DE202018106135U1 - Rear bicycle sprocket arrangement and bicycle powertrain - Google Patents

Abstract

A rear bicycle sprocket assembly comprising: at least one sprocket having at least ten internal splines adapted for engagement with a bicycle hub assembly.

Description

BACKGROUND OF THE INVENTION

REFERENCE TO OTHER APPLICATIONS

This application claims the benefit of the US patent application US 15 / 608,924 and the US patent application US 15 / 608,915 , filed on May 30, 2017. The entire disclosure of the US patent application US 15 / 608,924 and the US patent application US 15 / 608,915 is hereby incorporated by reference.

FIELD OF THE INVENTION

The present invention relates to a rear bicycle sprocket assembly and a bicycle powertrain.

DISCUSSION OF THE BACKGROUND

Cycling is becoming an increasingly popular form of recreational activity as well as a means of transport. In addition, cycling has become a very popular competitive sport for amateurs and professionals. Whether the bicycle is used for leisure, transportation or competition, the bicycle industry is constantly improving the various components of the bicycle. A bicycle component that has been extensively revised is a powertrain.

SUMMARY OF THE INVENTION

According to a first aspect of the present invention, a rear bicycle sprocket assembly comprises at least one sprocket. The at least one sprocket comprises at least ten internal splines or spline teeth adapted for engagement with a bicycle hub assembly.

In the rear bicycle sprocket assembly of the first aspect, the at least ten internal splines reduce a rotational force applied to each of the at least ten internal splines as compared to a sprocket having nine or fewer internal splines. This improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket.

According to a second aspect of the present invention, the rear bicycle sprocket assembly according to the first aspect is arranged such that a total number of the at least ten inner splines equal to or greater than 20 is.

In the rear bicycle sprocket assembly of the second aspect, the at least twenty inner splines further reduce the rotational force acting on each of the at least twenty inner splines, as compared to a sprocket having nine or fewer inner splines. This further improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket.

According to a third aspect of the present invention, the rear bicycle sprocket assembly according to the second aspect is arranged such that the total number of the at least ten inner splines is equal to or greater than 25 is.

In the rear bicycle sprocket assembly of the third aspect, the at least twenty-five internal splines further reduce the rotational force applied to each of the at least twenty internal splines as compared to a sprocket comprising nine or fewer internal splines. This further improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket.

According to a fourth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to third aspects is arranged such that the at least ten inner splines have a first inner pitch angle and a second inner pitch angle different from the first inner pitch angle.

With the rear bicycle sprocket assembly according to the fourth aspect, the difference between the first inner pitch angle and the second inner pitch angle assists the user to correctly attach the rear bicycle sprocket assembly to the bicycle hub assembly, particularly with respect to a circumferential position of each sprocket of the rear bicycle sprocket assembly.

According to a fifth aspect of the present invention, the rear bicycle sprocket assembly of any of aspects one to four is arranged such that at least one of the at least ten inner splines has a further first spline shape or spline shape different from a second spline shape of another of the at least ten inner splines different.

In the bicycle rear sprocket assembly according to the fifth aspect, the difference helps between the first spline shape and the second spline shape, the user correctly attaches the rear bicycle sprocket assembly to the bicycle hub assembly, particularly with respect to a circumferential position of each sprocket of the rear bicycle sprocket assembly.

According to a sixth aspect of the present invention, the rear bicycle sprocket assembly of any one of aspects one to five is arranged such that at least one of the at least ten inner splines has a first size different from a second size of another of the at least ten inner splines.

In the rear bicycle sprocket assembly according to the sixth aspect, the difference between the first size and the second size assists the user to correctly attach the rear bicycle sprocket assembly to the sprocket support body particularly with respect to a circumferential position of each sprocket of the rear bicycle sprocket assembly.

According to a seventh aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to sixth aspects is arranged such that the at least one sprocket comprises a smallest sprocket comprising at least one sprocket tooth. A total number of the at least one sprocket tooth of the smallest sprocket is equal to or smaller than 10 ,

With the rear bicycle sprocket assembly according to the seventh aspect, it is possible to expand a gear range of the rear bicycle sprocket assembly on the upper-speed side.

According to an eighth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to seventh aspects is arranged such that the at least one sprocket comprises a largest sprocket comprising at least one sprocket tooth. A total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 46 ,

With the rear bicycle sprocket assembly according to the eighth aspect, it is possible to expand the gear range of the rear bicycle sprocket assembly on one side of the low gears.

According to a ninth aspect of the present invention, the rear bicycle sprocket assembly according to the eighth aspect is arranged such that the total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 50 is.

With the rear bicycle sprocket assembly according to the ninth aspect, it is possible to further expand the gear range of the rear bicycle sprocket assembly.

According to a tenth aspect of the present invention, a rear bicycle sprocket assembly comprises at least one sprocket. The at least one sprocket comprises a plurality of internal splines adapted for engagement with a bicycle hub assembly. At least two inner splines of the plurality of inner splines are circumferentially disposed at a first inner lead angle with respect to a rotational center axis of the rear bicycle sprocket assembly. The first inner pitch angle is in the range of 10 degrees to 20 degrees.

In the rear bicycle sprocket assembly according to the tenth aspect, the first inner pitch angle reduces a rotational force applied to each of the at least ten inner splines, as compared with a sprocket having nine or fewer inner splines. This improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket.

According to an eleventh aspect of the present invention, the rear bicycle sprocket assembly according to the tenth aspect is arranged such that the first inner pitch angle is in the range of 12 degrees to 15 degrees.

In the rear bicycle sprocket assembly according to the eleventh aspect, the first inner pitch angle reduces a rotational force applied to each of the at least ten inner splines, as compared with a sprocket having nine or fewer inner splines. This further improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket.

According to a twelfth aspect of the present invention, the rear bicycle sprocket assembly according to the eleventh aspect is arranged such that the first inner pitch angle is in the range of 13 degrees to 14 degrees.

In the rear bicycle sprocket assembly of the twelfth aspect, the first inner pitch angle further reduces a rotational force applied to each of the at least ten inner splines, as compared to a sprocket having nine or fewer inner splines. This improves the durability of the at least one sprocket further and / or improves a degree of freedom in the selection of a material of the at least one sprocket, without reducing the durability of the at least one sprocket.

According to a thirteenth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the ten to twelve aspects is arranged such that at least two inner splines of the plurality of inner splines are circumferentially arranged at a second inner pitch angle with respect to the rotational center axis. The second inner pitch angle is different from the first inner pitch angle.

With the rear bicycle sprocket assembly according to the thirteenth aspect, the difference between the first inner pitch angle and the second inner pitch angle assists the user to correctly attach the rear bicycle sprocket assembly to the bicycle hub assembly, particularly with respect to a circumferential position of each sprocket of the rear bicycle sprocket assembly.

According to a fourteenth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the tenth to thirteenth aspects is arranged such that the at least one sprocket has a smallest sprocket having at least one sprocket tooth. A total number of the at least one sprocket tooth of the smallest sprocket is equal to or smaller than 10 ,

With the rear bicycle sprocket assembly according to the fourteenth aspect, it is possible to expand the gear range of the rear bicycle sprocket assembly on one side of the upper gears.

According to a fifteenth aspect of the present invention, the rear bicycle sprocket assembly according to any of the ten to fourteen aspects is arranged such that the at least one sprocket comprises a largest sprocket comprising at least one sprocket tooth. A total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 46 ,

With the rear bicycle sprocket assembly according to the fifteenth aspect, it is possible to expand the gear range of the rear bicycle sprocket assembly on one side of the low gears.

According to a sixteenth aspect of the present invention, the rear bicycle sprocket assembly according to the fifteenth aspect is arranged such that the total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 50 is.

With the rear bicycle sprocket assembly according to the sixteenth aspect, it is possible to further expand the speed range of the rear bicycle sprocket assembly.

According to a seventeenth aspect of the present invention, a rear bicycle sprocket assembly comprises at least one sprocket. The at least one sprocket includes at least one internal spline tooth configured to engage a bicycle hub assembly. The at least one internal spline has an internal spline diameter equal to or smaller than 30 mm.

With the rear bicycle sprocket assembly according to the seventeenth aspect, it is possible to manufacture a rear bicycle sprocket having a total teeth number equal to or smaller than 10 is. Therefore, it is possible to expand a gear range of the rear bicycle sprocket assembly on one side of the upper gears.

According to an eighteenth aspect of the present invention, the rear bicycle sprocket assembly according to the seventeenth aspect is arranged so that the main internal spline diameter is equal to or larger than 25 mm.

With the rear bicycle sprocket assembly according to the eighteenth aspect, it is possible to secure the strength of the at least one sprocket by broadening the gear portion of the rear bicycle sprocket assembly on one side of the upper gears.

According to a nineteenth aspect of the present invention, the rear bicycle sprocket assembly according to the eighteenth aspect is arranged so that the main internal spline diameter is equal to or larger than 29 mm.

With the rear bicycle sprocket assembly according to the nineteenth aspect, it is possible to further ensure the strength of the at least one sprocket by widening the gear range of the rear bicycle sprocket assembly on one side of the upper gears.

According to a twentieth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the seventeenth to nineteenth aspects is arranged such that the at least one inner spline has an inner spline diameter equal to or smaller than 28 mm.

In the rear bicycle sprocket assembly according to the twentieth aspect, the inner spline diameter may be the radial length of a drive surface of the at least one inner spline enlarge. This improves the strength of the at least one sprocket.

According to a twenty-first aspect of the present invention, the bicycle rear sprocket assembly according to the twentieth aspect is arranged such that the internal spline or spline diameter is equal to or greater than 25 mm.

With the rear bicycle sprocket assembly according to the twenty-first aspect, it is possible to secure the strength of the at least one sprocket with broadening of the rear bicycle sprocket gear area on one side of the upper gears.

According to a twenty-second aspect of the present invention, the rear bicycle sprocket assembly according to the twenty-first aspect is arranged so that the inner spline diameter is equal to or larger than 27 mm.

With the rear bicycle sprocket assembly according to the twenty-second aspect, it is possible to surely secure the strength of the at least one sprocket by expanding the gear range of the rear bicycle sprocket assembly on one side of the upper gears.

According to a twenty-third aspect of the present invention, the rear bicycle sprocket assembly according to any one of the seventeenth to twenty-second aspects is arranged such that the at least one inner spline includes a plurality of inner splines having a plurality of inner spline driving surfaces to receive a drive rotational force from the bicycle hub assembly during the pedal operation. The plurality of internal spline drive surfaces each include a radially outermost edge, a radially innermost edge, and a radial length defined from the radially outermost edge to the radially innermost edge. A total sum of the radial lengths of the plurality of internal spline driving surfaces is equal to or larger than 7 mm.

With the rear bicycle sprocket assembly according to the twenty-third aspect, it is possible to increase the radial lengths of the plurality of internal spline driving surfaces. This improves the strength of the at least one sprocket.

According to a twenty-fourth aspect of the present invention, the rear bicycle sprocket assembly according to the twenty-third aspect is arranged so that the total sum of the radial lengths is equal to or larger than 10 mm.

With the rear bicycle sprocket assembly according to the twenty-fourth aspect, it is possible to further increase the radial lengths of the plurality of internal spline driving surfaces. This improves the strength of the at least one sprocket.

According to a twenty-fifth aspect of the present invention, the rear bicycle sprocket assembly according to the twenty-third aspect is arranged such that the total sum of the radial lengths is equal to or larger than 15 mm.

With the bicycle rear sprocket assembly according to the twenty-fifth aspect, it is possible to further increase the radial lengths of the plurality of internal spline driving surfaces. This further improves the strength of the at least one sprocket.

According to a twenty-sixth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the seventeenth through twenty-fifth aspects is arranged such that the at least one sprocket has a smallest sprocket having at least one sprocket tooth. A total number of the at least one sprocket tooth of the smallest sprocket is equal to or smaller than 10 ,

With the rear bicycle sprocket assembly according to the twenty-sixth aspect, it is possible to expand the gear range of the rear bicycle sprocket assembly on one side of the upper gears.

According to a twenty-seventh aspect of the present invention, the rear bicycle sprocket assembly according to any one of the seventeenth through twenty-sixth aspects is arranged such that the at least one sprocket has a largest sprocket having at least one sprocket tooth. A total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 46 ,

With the rear bicycle sprocket assembly according to the twenty-seventh aspect, it is possible to expand the gear range of the rear bicycle sprocket assembly on one side of the low gears.

According to a twenty-eighth aspect of the present invention, the rear bicycle sprocket assembly according to the twenty-seventh aspect is arranged such that the total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 50 is.

With the rear bicycle sprocket assembly according to the twenty-eighth aspect, it is possible to further expand the gear range of the rear bicycle sprocket assembly.

According to a twenty-ninth aspect of the present invention, a rear bicycle sprocket assembly comprises at least one sprocket. The at least one sprocket has at least one internal spline tooth adapted to engage a bicycle hub assembly. The at least one internal spline includes an internal spline drive surface and an internal spline non-drive surface. The internal spline drive surface has a first internal spline surface angle defined between the internal spline drive surface and a first radial line extending from a rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the internal spline drive surface. The internal spline non-drive surface has a second internal spline surface angle defined between the internal spline non-drive surface and a second radial line extending from the rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the internal splined non-drive surface. The second internal spline surface angle is different from the first internal spline surface angle.

With the rear bicycle sprocket assembly according to the twenty-ninth aspect, it is possible to save a weight of the at least one sprocket while securing the strength of the at least one internal spline of the at least one sprocket.

According to a thirtieth aspect of the present invention, the rear bicycle sprocket assembly according to the twenty-ninth aspect is arranged such that the first inner spline surface angle is smaller than the second inner spline surface angle.

With the rear bicycle sprocket assembly according to the thirtieth aspect, it is possible to effectively save the weight of the at least one sprocket while securing the strength of the at least one internal spline of the at least one sprocket.

According to a thirty-first aspect of the present invention, the rear bicycle sprocket assembly according to the twenty-ninth or thirtieth aspect is arranged so that the first internal spline surface angle ranges from 0 degrees to 10 degrees.

In the rear bicycle sprocket assembly according to the thirty-first aspect, the first internal spline surface angle ensures the strength of the internal spline drive surface.

According to a thirty-second aspect of the present invention, the rear bicycle sprocket assembly according to any one of the twenty-ninth through thirty-first aspects is arranged such that the second internal spline surface angle ranges from 0 degrees to 60 degrees.

In the rear bicycle sprocket assembly according to the thirty-second aspect, the second internal spline surface angle saves a weight of the at least one sprocket.

According to a thirty-third aspect of the present invention, the rear bicycle sprocket assembly according to any one of the twenty-ninth through thirty-second aspects is arranged such that the at least one sprocket has a smallest sprocket having at least one sprocket tooth. A total number of the at least one sprocket tooth of the smallest sprocket is equal to or smaller than 10 ,

With the rear bicycle sprocket assembly according to the thirty-third aspect, it is possible to expand the gear range of the rear bicycle sprocket assembly on one side of the upper gears.

According to a thirty-fourth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the twenty-ninth through thirty-third aspects is arranged such that the at least one sprocket has a largest sprocket having at least one sprocket tooth. A total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 46 ,

With the rear bicycle sprocket assembly according to the thirty-fourth aspect, it is possible to expand the gear range of the rear bicycle sprocket assembly on one side of the low gears.

According to a thirty-fifth aspect of the present invention, the rear bicycle sprocket assembly according to the thirty-fourth aspect is arranged such that the total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 50 is.

With the rear bicycle sprocket assembly according to the thirty-fifth aspect, it is possible to further expand the gear range of the rear bicycle sprocket assembly.

According to a thirty-sixth aspect of the present invention, a bicycle drive train includes the rear bicycle sprocket assembly according to any one of the first to ninth aspects and a bicycle hub assembly. The bicycle hub assembly includes a sprocket support body having at least ten outer wedge or spline teeth adapted for engagement with the rear bicycle sprocket assembly. Each of the at least ten outer spline teeth has an outer spline outer spline drive surface and an outer spline non-drive surface.

In the bicycle powertrain of the thirty-sixth aspect, the at least ten inner splines reduce a rotational force applied to each of the at least ten inner splines, as compared with a sprocket having nine or fewer inner splines. This improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket. Further, the at least ten outer spline teeth reduce a rotational force applied to each of the at least ten outer spline teeth as compared to a sprocket support having nine or fewer outer spline teeth. This improves the durability of the sprocket support body and / or improves the degree of freedom in selecting a material of the sprocket support body without reducing the durability of the sprocket support body.

According to a thirty-seventh aspect of the present invention, a bicycle drive train includes the rear bicycle sprocket assembly according to any of the tenth to sixteenth aspects and a bicycle hub assembly. The bicycle hub assembly includes a sprocket support body having a plurality of external spline teeth adapted for engagement with the rear bicycle sprocket assembly. At least two outer spline teeth of the plurality of outer spline teeth are circumferentially disposed at a first outer pitch angle with respect to a rotational center axis of the bicycle hub assembly. The first external pitch angle ranges from 10 degrees to 20 degrees.

In the bicycle powertrain of the thirty-seventh aspect, the first inner pitch angle reduces a rotational force applied to each of the at least ten inner splines, as compared to a sprocket having nine or fewer inner splines. This improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket. Further, the at least ten outer spline teeth reduce a rotational force applied to each of the at least ten outer spline teeth as compared to a sprocket support having nine or fewer outer spline teeth. This improves the durability of the sprocket support body and / or improves the degree of freedom in selecting a material of the sprocket support body without reducing the durability of the sprocket support body.

According to a thirty-eighth aspect of the present invention, a bicycle powertrain includes the rear bicycle sprocket assembly according to any one of the seventeenth through twenty-eighth aspects, and a bicycle hub assembly. The bicycle hub assembly includes a sprocket support body having at least one outer spline tooth configured for engagement with the rear bicycle sprocket assembly. The at least one outer spline has an outer spline main diameter equal to or smaller than 30 mm.

With the bicycle powertrain according to the thirty-eighth aspect, it is possible to manufacture a rear sprocket having a total number of teeth equal to or smaller than 10. Therefore, it is possible to expand a gear range of the bicycle powertrain.

According to a thirty-ninth aspect of the present invention, a bicycle powertrain includes the rear bicycle sprocket assembly according to any of the twenty-ninth through thirty-fifth aspects, and a bicycle hub assembly. The bicycle hub assembly includes a sprocket support body having at least nine outer splines adapted for engagement with the rear bicycle sprocket assembly. At least one of the at least nine outer splines has an asymmetrical shape with respect to a circumferential tooth tip centerline. The at least one of the at least nine outer spline teeth includes an outer spline drive surface and an outer spline non-drive surface. The outer spline drive surface has a first outer spline surface angle defined between the outer spline drive surface and a first radial line extending from a rotational centerline of the bicycle hub assembly to a radially outermost edge of the outer spline drive surface. The outer spline non-drive surface has a second outer spline surface angle defined between the outer spline non-drive surface and a second radial line extending from the rotational centerline of the bicycle hub assembly to a radially outermost edge of the outer spline non-drive surface. The second External spline surface angle is different from the first external spline surface angle.

With the bicycle powertrain according to the thirty-ninth aspect, it is possible to save a weight of the bicycle powertrain by securing the strength of the bicycle powertrain.

According to a fortieth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to ninth aspects is arranged such that the at least ten inner splines have an inner spline main diameter equal to or larger than 25 mm.

In the rear bicycle sprocket assembly according to the fortieth aspect, it is possible to ensure the strength of the at least one sprocket.

According to a forty-first aspect of the present invention, the bicycle rear sprocket assembly according to the fortieth aspect is arranged so that the internal spline haptic diameter is equal to or larger than 29 mm.

With the rear bicycle sprocket assembly according to the forty-first aspect, it is possible to further secure the strength of the at least one sprocket.

According to a forty-second aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to ninth, fortieth and forty-first aspects is arranged such that the at least ten inner splines have an inner spline diameter equal to or larger than 25 mm.

In the rear bicycle sprocket assembly according to the forty-second aspect, it is possible to secure the strength of the at least one sprocket.

According to a forty-third aspect of the present invention, the rear bicycle sprocket assembly according to the forty-second aspect is arranged so that the inner spline diameter is equal to or larger than 27 mm.

With the rear bicycle sprocket assembly according to the forty-third aspect, it is possible to surely secure the strength of the at least one sprocket.

According to a forty-fourth aspect of the present invention, the bicycle rear sprocket assembly of any of the first to ninth and fortieth to forty-third aspects is arranged such that the at least ten internal splines comprise a plurality of internal spline drive surfaces for receiving drive rotational force from the bicycle hub assembly during pedaling. The plurality of internal spline drive surfaces each include a radially outermost edge, a radially innermost edge, and a radial length defined from the radially outermost edge to the radially innermost edge. A total sum of the radial lengths of the plurality of internal spline driving surfaces is equal to or larger than 7 mm.

With the rear bicycle sprocket assembly according to the forty-fourth aspect, it is possible to increase the radial lengths of the plurality of internal spline driving surfaces. This improves the strength of the at least one sprocket.

According to a forty-fifth aspect of the present invention, the rear bicycle sprocket assembly according to the forty-fourth aspect is arranged so that the total sum of the radial lengths is equal to or larger than 10 mm.

With the rear bicycle sprocket assembly according to the forty-fifth aspect, it is possible to further increase the radial lengths of the plurality of internal spline driving surfaces. This improves the strength of the at least one sprocket.

According to a forty-sixth aspect of the present invention, the rear bicycle sprocket assembly according to the forty-fourth aspect or the forty-fifth aspect is arranged such that the total sum of the radial lengths is equal to or larger than 15 mm.

With the rear bicycle sprocket assembly according to the forty-sixth aspect, it is possible to further increase the radial lengths of the plurality of internal spline driving surfaces. This further improves the strength of the at least one sprocket.

According to a forty-seventh aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to ninth and fortieth to forty-sixth aspects is arranged such that at least two inner splines of the at least ten inner splines are circumferentially disposed at a first inner pitch angle with respect to a rotational center axis of the rear bicycle sprocket assembly are. The first inner pitch angle is in the range of 10 degrees to 20 degrees.

In the rear bicycle sprocket assembly according to the forty-seventh aspect, the FIG first inner pitch angle is a rotational force applied to each of the at least ten inner splines, as compared to a sprocket having nine or fewer inner splines. This improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket. Further, the at least ten outer spline teeth reduce a rotational force applied to each of the at least ten outer spline teeth as compared to a sprocket support having nine or fewer outer spline teeth. This improves the durability of the sprocket support body and / or improves the degree of freedom in selecting a material of the sprocket support body without reducing the durability of the sprocket support body.

According to a forty-eighth aspect of the present invention, the rear bicycle sprocket assembly according to the forty-seventh aspect is arranged such that the first inner pitch angle is in the range of 12 degrees to 15 degrees.

In the rear bicycle sprocket assembly of the forty-eighth aspect, the first inner pitch angle further reduces a rotational force applied to each of the at least ten inner splines as compared to a sprocket having nine or fewer inner splines. This further improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket.

According to a forty-ninth aspect of the present invention, the rear bicycle sprocket assembly according to the forty-fourth aspect or the forty-eighth aspect is arranged such that the first inner pitch angle is in the range of 13 degrees to 14 degrees.

In the rear bicycle sprocket assembly according to the forty-ninth aspect, the first inner pitch angle further reduces a rotational force applied to each of the at least ten inner splines as compared to a sprocket having nine or fewer inner splines. This further improves the durability of the at least one sprocket and / or improves a degree of freedom in selecting a material of the at least one sprocket without reducing the durability of the at least one sprocket.

According to a fiftieth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the forty-seventh to the forty-ninth aspect is arranged such that at least two inner splines of the at least ten inner splines are circumferentially arranged at a second inner pitch angle with respect to the rotational center axis. The second inner pitch angle is different from the first inner pitch angle.

With the rear bicycle sprocket assembly according to the fiftieth aspect, the difference between the first inner pitch angle and the second inner pitch angle assists the user to correctly attach the rear bicycle sprocket assembly to the bicycle hub assembly, particularly with respect to a circumferential position of each sprocket of the rear bicycle sprocket assembly.

According to a fifty-first aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to ninth and fortieth to fiftieth aspects is arranged such that the at least ten inner splines have an inner spline drive surface and an inner spline non-drive surface. The internal spline drive surface has a first internal spline surface angle defined between the internal spline drive surface and a first radial line extending from a rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the internal spline drive surface. The internal spline non-drive surface has a second internal spline surface angle defined between the internal spline non-drive surface and a second radial line extending from the rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the internal splined non-drive surface. The second internal spline surface angle is different from the first internal spline surface angle.

With the rear bicycle sprocket assembly according to the fifty-first aspect, it is possible to save a weight of the at least one sprocket while securing the strength of the at least one internal spline of the at least one sprocket.

According to a fifty-second aspect of the present invention, the rear bicycle sprocket assembly according to the fifty-first aspect is arranged such that the first inner spline surface angle is smaller than the second inner spline surface angle.

With the rear bicycle sprocket assembly according to the fifty-second aspect, it is possible to effectively save the weight of the at least one sprocket, wherein the strength of the at least one an internal spline of the at least one sprocket is saved.

According to a fifty-third aspect of the present invention, the rear bicycle sprocket assembly according to the fifty-first aspect or the fifty-second aspect is arranged so that the first internal spline surface angle ranges from 0 degrees to 10 degrees.

In the rear bicycle sprocket assembly according to the fifty-third aspect, the first internal spline surface angle ensures the strength of the internal spline drive surface.

According to a fifty-fifth aspect of the present invention, the rear bicycle sprocket assembly according to the fifty-first aspect is arranged so that the second internal spline surface angle is between 0 degrees and 60 degrees.

In the rear bicycle sprocket assembly according to any one of the fifty-first through the fifty-fourth aspects, the second internal spline surface angle saves a weight of the at least one sprocket.

According to a fifty-fifth aspect of the present invention, the rear bicycle sprocket assembly according to any one of the first to thirty-fifth and fiftieth to fifty-fourth aspects further comprises a sprocket mount with which the at least one sprocket is mounted.

According to a fifty-sixth aspect of the present invention, the rear bicycle sprocket assembly according to the fifty-fifth aspect is arranged such that the sprocket support is made of a non-metallic material comprising a resin material.

list of figures

• 1 ist eine schematische Darstellung eines Fahrradantriebsstrangs nach einer Ausführungsform.
• 2 ist eine perspektivische Explosionsansicht des Fahrradantriebsstrangs, der in 1 dargestellt ist.
• 3 ist eine weitere perspektivische Ansicht des in 2 dargestellten Fahrradantriebsstrangs.
• 4 ist eine Querschnittsansicht des Fahrradantriebsstrangs entlang der Linie IV-IV von 2.
• 5 ist eine perspektivische Explosionsansicht einer Fahrradnabenanordnung des Fahrradantriebsstranges, der in 2 dargestellt ist.
• 6 ist eine vergrößerte Querschnittsansicht des in 4 dargestellten Fahrradantriebs.
• 7 ist eine perspektivische Ansicht eines Kettenradstützkörpers der Fahrradnabenanordnung des in 2 dargestellten Fahrradantriebsstrangs.
• 8 ist eine weitere perspektivische Ansicht des Kettenradstützkörpers der Fahrradnabenanordnung des in 2 dargestellten Fahrradantriebsstrangs.
• 9 ist eine Seitenaufrissansicht des in 7 dargestellten Kettenradstützkörpers.
• 10 ist eine Seitenaufrissansicht eines Kettenradstützkörpers der Fahrradnabenanordnung nach einer Modifikation.
• 11 ist eine vergrößerte Querschnittsansicht des in 7 dargestellten Kettenradstützkörpers.
• 12 ist eine Querschnittsansicht des in 7 dargestellten Kettenradstützkörpers.
• 13 ist eine perspektivische Ansicht der Fahrradnabenanordnung des in 2 dargestellten Fahrradantriebsstrangs.
• 14 ist eine Seitenaufrissansicht der Fahrradnabenanordnung des in 2 dargestellten Fahrradantriebsstrangs.
• 15 ist eine Rückansicht der Fahrradnabenanordnung des in 2 dargestellten Fahrradantriebsstrangs.
• 16 ist eine Querschnittsansicht der Fahrradnabenanordnung entlang der Linie XVI-XVI von 5.
• 17 ist eine Seitenaufrissansicht der hinteren Fahrradkettenradanordnung des in 2 dargestellten Fahrradantriebsstrangs
• 18 ist eine perspektivische Explosionsansicht der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 19 ist eine perspektivische Teilexplosionsansicht der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 20 ist eine weitere perspektivische Teilexplosionsansicht der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 21 ist eine weitere perspektivische Teilexplosionsansicht der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 22 ist eine weitere perspektivische Teilexplosionsansicht der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 23 ist eine perspektivische Querschnittsansicht der hinteren Fahrradkettenradanordnung entlang der Linie XXIII-XXIII von 17.
• 24 ist eine perspektivische Ansicht eines kleinsten Kettenrads der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 25 ist eine weitere perspektivische Ansicht des kleinsten Kettenrads der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 26 ist eine Seitenaufrissansicht des kleinsten Kettenrads der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 27 ist eine Seitenaufrissansicht eines kleinsten Kettenrads nach einer Modifikation.
• 28 ist eine vergrößerte Querschnittsansicht des in 24 dargestellten kleinsten Kettenrads.
• 29 ist eine Querschnittsansicht des in 24 dargestellten kleinsten Kettenrads.
• 30 ist eine Querschnittsansicht des Kettenradstützkörpers und des kleinsten Kettenrads des in 2 dargestellten Fahrradantriebsstrangs.
• 31 ist eine perspektivische Teilexplosionsansicht der in 17 dargestellten hinteren Fahrradkettenradanordnung.
• 32 ist eine perspektivische Ansicht einer Kettenradhalterung der in 17 dargestellten hinteren Fahrradkettenradanordnung.

A more complete understanding of the invention and many of the attendant advantages will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings.

• 1 is a schematic representation of a bicycle drive train according to an embodiment.
• 2 FIG. 11 is an exploded perspective view of the bicycle powertrain incorporated in FIG 1 is shown.
• 3 is another perspective view of the in 2 illustrated bicycle drive train.
• 4 is a cross-sectional view of the bicycle powertrain along the line IV-IV of 2 ,
• 5 FIG. 13 is an exploded perspective view of a bicycle hub assembly of the bicycle drive train incorporated in FIG 2 is shown.
• 6 is an enlarged cross-sectional view of the in 4 illustrated bicycle drive.
• 7 FIG. 15 is a perspective view of a sprocket support of the bicycle hub assembly of FIG 2 illustrated bicycle drive train.
• 8th FIG. 12 is another perspective view of the sprocket support of the bicycle hub assembly of FIG 2 illustrated bicycle drive train.
• 9 is a side elevational view of the in 7 shown sprocket support body.
• 10 FIG. 10 is a side elevational view of a sprocket support of the bicycle hub assembly according to a modification. FIG.
• 11 is an enlarged cross-sectional view of the in 7 shown sprocket support body.
• 12 is a cross-sectional view of the in 7 shown sprocket support body.
• 13 FIG. 15 is a perspective view of the bicycle hub assembly of FIG 2 illustrated bicycle drive train.
• 14 FIG. 11 is a side elevational view of the bicycle hub assembly of FIG 2 illustrated bicycle drive train.
• 15 is a rear view of the bicycle hub assembly of the in 2 illustrated bicycle drive train.
• 16 is a cross-sectional view of the bicycle hub assembly along the line XVI-XVI of 5 ,
• 17 FIG. 11 is a side elevational view of the rear bicycle sprocket assembly of FIG 2 illustrated bicycle drive train
• 18 FIG. 11 is an exploded perspective view of FIG 17 illustrated rear bicycle sprocket assembly.
• 19 is a perspective exploded view of the in 17 illustrated rear bicycle sprocket assembly.
• 20 is another perspective exploded view of the in 17 illustrated rear bicycle sprocket assembly.
• 21 is another perspective exploded view of the in 17 illustrated rear bicycle sprocket assembly.
• 22 is another perspective exploded view of the in 17 illustrated rear bicycle sprocket assembly.
• 23 is a perspective cross-sectional view of the rear Fahrradkettenradanordnung along the line XXIII-XXIII of 17 ,
• 24 is a perspective view of a smallest sprocket in 17 illustrated rear bicycle sprocket assembly.
• 25 is another perspective view of the smallest sprocket in 17 illustrated rear bicycle sprocket assembly.
• 26 FIG. 11 is a side elevational view of the smallest sprocket in FIG 17 illustrated rear bicycle sprocket assembly.
• 27 Fig. 11 is a side elevation view of a smallest sprocket after a modification.
• 28 is an enlarged cross-sectional view of the in 24 illustrated smallest sprocket.
• 29 is a cross-sectional view of the in 24 illustrated smallest sprocket.
• 30 is a cross-sectional view of the sprocket support body and the smallest sprocket of the in 2 illustrated bicycle drive train.
• 31 is a perspective exploded view of the in 17 illustrated rear bicycle sprocket assembly.
• 32 FIG. 15 is a perspective view of a sprocket support of FIG 17 illustrated rear bicycle sprocket assembly.

DESCRIPTION OF THE EMBODIMENTS

The embodiment (s) will now be described with reference to the accompanying drawings, in which like reference characters designate corresponding or identical elements throughout the several drawings.

With initial reference to 1 includes a bicycle powertrain 10 according to one embodiment, a bicycle hub assembly 12 and a rear bicycle sprocket assembly 14 , The bicycle hub assembly 12 is attached to a bicycle frame BF. The rear bicycle sprocket assembly 14 gets on the bicycle hub assembly 12 attached. A bicycle brake rotor 16 is on the bicycle hub assembly 12 attached.

The bicycle powertrain 10 further comprises a crank assembly 18 and a bicycle chain 20 , The crank assembly 18 includes a crank axle 22 , a right crank arm 24 , a left crank arm 26 and a front sprocket 27 , The right crank arm 24 and the left crank arm 26 are on the crank axle 22 attached. The front sprocket 27 is at least one of the crank axle 22 and the right crank arm 24 attached. The bicycle chain 20 is with the front sprocket 27 and the rear bicycle sprocket assembly 14 connected to a pedaling force from the front sprocket 27 on the rear bicycle sprocket assembly 14 transferred to. The crank assembly 18 has the sprocket in the illustrated embodiment 27 as a single sprocket. The crank assembly 18 however, may have multiple front sprockets. The rear bicycle sprocket assembly 14 is a rear sprocket assembly. However, there may be structures of the rear bicycle sprocket assembly 14 be applied to the front sprocket.

In the present application, the following directional terms refer to "front", "rear", "forward", "backward", "left", "right", "across", "up" and "down", as well as other similar directional indications in those directions determined from the perspective of the user (e.g., the cyclist) sitting on a saddle (not shown) of a bicycle and facing the handlebar (not shown). Accordingly, these terms are intended to describe the bicycle powertrain 10 . the bicycle hub assembly 12 or the rear bicycle sprocket assembly 14 used with respect to that with the bicycle powertrain 10 , the bicycle hub layout 12 or the rear bicycle sprocket assembly 14 equipped bicycle as it is used in an upright riding position on a horizontal surface.

As in 2 and 3 to see the bicycle hub assembly 12 and the rear bicycle sprocket assembly 14 a rotational center axis A1 on. The rear bicycle sprocket assembly 14 is through the bicycle hub assembly 12 Regarding the bicycle frame BF ( 1 ) about the rotational center axis A1 rotatably supported around. The rear bicycle sprocket assembly 14 is set up with the bike chain 20 engaged to drive torque between the bicycle chain 20 and the rear bicycle sprocket assembly 14 during pedal operation. The bicycle rear sprocket assembly becomes about the rotational center axis during the pedal operation A1 around in a driving direction D11 turned. The driving direction of rotation D11 is along a circumferential direction D1 the bicycle hub assembly 12 or the rear bicycle sprocket assembly 14 Are defined. A reverse direction of rotation D12 is an opposite direction to the driving direction D11 and is along the circumferential direction D1 Are defined.

As in 2 to see includes the bicycle hub assembly 12 a sprocket support body 28 , The rear bicycle sprocket assembly is attached to the sprocket support body 28 attached to the drive torque F1 between the sprocket support body 28 and the rear bicycle sprocket assembly. The bicycle hub assembly 12 further comprises a hub axle 30 , The sprocket support body 28 is rotatable on the hub axle 30 around the central axis of rotation A1 attached around. The bicycle hub assembly 12 includes a locking ring 32 , The locking ring 32 is on the sprocket support body 28 attached to the rear bicycle sprocket assembly 14 with respect to the sprocket support body 28 in an axial direction D2 parallel to the central axis of rotation A1 to keep.

As in 4 to see is the bicycle hub layout 12 on the bicycle frame BF attached with a wheel attachment structure WS. The hub axle 30 has a through hole 30A on. A fixing rod WS1 the wheel attachment structure WS extends through the hole 30A the hub axle 30 therethrough. The hub axle 30 includes a first axle end 30B and a second axle end 30C , The hub axle 30 extends between the first axis end 30B and the second axis end 30C along the rotational center axis A1 , The first axle end 30B is in a first recess BF 11 a first frame BF1 of the bicycle frame BF intended. The second axis end 30C is in a second recess BF21 a second frame BF2 of the bicycle frame BF intended. The hub axle 30 will be between the first frame BF1 and the second frame BF2 with the wheel securing structure WS held. The wheel securing structure WS includes a structure known in the bicycle field. Therefore, for the sake of brevity, it will not be described in detail.

As in 4 and 5 to see includes the bicycle hub assembly 12 Further, a brake rotor support body 34 , The brake rotor support body 34 is at the hub axle 30 around the central axis of rotation A1 rotatably mounted around. The brake rotor support body 34 is with the bicycle brake rotor 16 ( 1 ) to apply a braking torque from the bicycle brake rotor 16 to the brake rotor support body 34 transferred to.

As in 5 to see includes the bicycle hub assembly 12 also a hub body 36 , The hub body 36 is rotatable about the rotational center axis A1 around at the hub axle 30 attached. In this embodiment, the sprocket support body 28 one from the hub body 36 separate element. The brake rotor support body 34 is integral with the hub body 36 provided as a one-piece unitary element. However, the sprocket support body may be integral with the hub body 36 be provided. The brake rotor support body 34 may be one of the hub body 36 be separate element.

The hub body 36 includes a first flange 36A and a second flange 36B , First spokes (not shown) are with the first flange 36A connected. Second spokes (not shown) are with the second flange 36B connected. The second flange 36B is from the first flange 36A in the axial direction D2 spaced. The first flange 36A is in the axial direction D2 between the sprocket support body 28 and the second flange 36B intended. The second flange 36B is in the axial direction D2 between the first flange 36A and the brake rotor support body 34 intended.

The locking ring 32 includes an externally threaded part 32A , The sprocket support body 28 has an internally threaded portion 28A on. The external thread section 32A is with the female thread section 28A in a threaded condition in which the locking ring 32 on the sprocket support body 28 is attached.

As in 6 to see includes the bicycle hub assembly 12 Furthermore, a pawl structure 38 , The sprocket support body 28 is over the pawl structure 38 with the hub body 36 operatively connected. The pawl structure 38 is set up to the Kettenradstützkörper 28 with the hub body 36 to connect the sprocket support during pedal operation 28 together with the hub body 36 in the drive direction of rotation D11 ( 5 ) to turn. The pawl structure 38 is set up to the sprocket support body 28 during coasting, with respect to the hub body 36 in the reverse direction D12 ( 5 ) to turn. Accordingly, the pawl structure 38 in a one-way clutch structure 38 be circumscribed. The pawl structure 38 includes structures that are known in the bicycle field. Therefore, for the sake of brevity, they will not be described in detail here.

The bicycle hub assembly 12 includes a first camp 39A and a second camp 39B , The first camp 39A and the second camp 39B are between the sprocket support body 28 and the hub axle 30 provided to the sprocket support body 28 with respect to the hub axle 30 around the central axis of rotation A1 rotatable support around.

In this embodiment, each of the sprocket support bodies 28 , the Brake rotor support body 34 and the hub body 36 each made of a metallic material such as aluminum, iron or titanium. However, at least one of the sprocket support body may 28 , the brake rotor support body 34 and the hub body 36 be made of a non-metallic material.

As in 7 and 8th to see includes the Kettenradstützkörper 28 at least one external wedge tooth 40 for engagement with the rear bicycle sprocket assembly 14 ( 6 ) is set up. The sprocket support body 28 includes several external splines 40 for engagement with the rear bicycle sprocket assembly 14 ( 6 ) are set up. That is, the at least one outer wedge tooth 40 includes several external splines 40 , The sprocket support body 28 includes at least nine external wedge teeth 40 that are set to work with the rear bicycle sprocket assembly 14 ( 6 ) to be engaged. The sprocket support body 28 includes at least ten outer splines 40 that are set to work with the rear bicycle sprocket assembly 14 ( 6 ) to be engaged.

The sprocket support body 28 includes a base carrier 41 which has a tubular shape. The basic carrier 41 extends along the rotational center axis A1 , The outer wedge tooth 40 extends from the base carrier 41 radially outward. The sprocket support body 28 includes a part 42 with larger diameter, a flange 44 and a plurality of spiral outer splines 46 , The part 42 with larger diameter and the flange 44 extend from the base carrier 41 radially outward. The part 42 with larger diameter is between the several outer splines 40 and the flange 44 in the axial direction D2 intended. The part 42 with larger diameter and the flange 44 are in the axial direction D2 between the several external splines 40 and the plurality of external spiral splines 46 intended. As in 6 The rear bicycle sprocket assembly becomes visible 14 in the axial direction D2 between the part of larger diameter 42 and a locking flange 32B of the locking ring 32 held. The part 42 with the larger diameter may have an inner cavity so that a drive structure such as a one-way clutch structure may be contained in the inner cavity. The part 42 with the larger diameter can be out of the bicycle hub assembly as needed 12 be omitted.

As in 9 to see is the total number of at least ten outer wedge teeth 40 equal to or greater than 20 , The total number of at least ten outer splines 40 is equal to or greater than 25 , In this embodiment, the total number of external splines is 40 26 , The total number of external splines 40 however, is not limited to this embodiment and the above ranges.

The at least ten outer wedge teeth 40 have a first outer pitch angle PA11 and a second outer pitch angle PA12 on. At least two outer splines of the plurality of outer spline teeth are in the first outer pitch angle PA11 with respect to the rotational center axis A1 the bicycle hub assembly 12 arranged in the circumferential direction. At least two external splines of the plurality of external splines 40 are in the circumferential direction in the second pitch angle PA12 with respect to the rotational center axis A1 the bicycle hub assembly 12 arranged. In this embodiment, the second outer pitch angle is different PA12 from the first outer pitch angle PA11 , The second outer pitch angle PA12 however, may be substantially equal to the first outer pitch angle PA11 be.

In this embodiment, the external splines are 40 in the circumferential direction D1 in the first outer pitch angle PA11 arranged. Two external splines of external splines 40 are in the second outer pitch angle PA12 in the circumferential direction D1 arranged. However, at least two outer splines of the outer splines 40 at another outer angle in the circumferential direction D1 be arranged.

The first outer slope angle PA11 ranges from 10 degrees to 20 degrees. The first outer slope angle PA11 ranges from 12 degrees to 15 degrees. The first outer slope angle PA11 ranges from 13 degrees to 14 degrees. In this embodiment, the first outer pitch angle PA11 13.3 degrees. The first outer slope angle PA11 however, is not limited to this embodiment and the above ranges.

The second outer pitch angle PA12 ranges from 5 degrees to 30 degrees. In this embodiment, the second outer pitch angle is PA12 26 degrees. The second outer pitch angle PA12 however, it is not limited to this embodiment and the above range.

The outer wedge teeth 40 have substantially the same shape. The outer wedge teeth 40 have substantially the same spline size. The outer wedge teeth 40 have substantially the same profile when along the central axis of rotation A1 to be viewed as. As in 10 However, at least one of the at least ten outer splines can be seen 40 a first spline shape extending from a second spline shape of another of the at least ten outer spline teeth 40 different. At least one of the at least ten External splines 40 may have a first spline size that is different from a second spline size of another of the at least ten outer splines 40 different. At least one of the at least ten outer wedge teeth 40 may have a profile that differs from a profile of another of the at least ten outer splines 40 differs when it is along the rotational center axis A1 is looked at. In 10 has one of the outer splines 40 a spline shape, which differs from a spline shape of the other teeth of the outer splines 40 different. One of the outer wedge teeth 40 has a spline size that is different from a spline size of the other teeth of the outer splines 40 different. One of the outer wedge teeth 40 has a profile that differs from a profile of the other teeth of the outer splines 40 makes a difference when moving along the center axis of rotation A1 to be viewed as.

As in 11 to see, each of the at least 40 External splines an external spline drive surface 48 and an outer spline non-drive surface 50 on. The several external splines 40 include a plurality of external spline drive surfaces 48 to the drive torque F1 from the rear bicycle sprocket arrangement 14 ( 6 ) during pedal operation. The several external splines 40 include a plurality of external spline non-drive surfaces 50 , The outer wedge drive surface 48 is with the rear bicycle sprocket assembly 14 contactable to the drive torque F1 from the rear bicycle sprocket arrangement 14 ( 6 ) during pedal operation. The external spline drive surface 48 is the reverse direction D12 facing. The outer spline non-drive surface 50 is on a back side of the external spline drive surface 48 in the circumferential direction D1 intended. The outer spline non-drive surface 50 is the driving direction D11 facing, not to the drive torque F1 from the rear bicycle sprocket arrangement 14 during the pedal operation.

The at least ten outer wedge teeth 40 each have a maximum circumferential width MW1 on. The outer wedge teeth 40 each have maximum circumferential widths MW1 on. The maximum circumferential width MW1 is defined as a maximum width to one on the outer spline 40 exerted pressure force F2 take. The maximum circumferential width MW1 is as a straight distance based on the external spline drive surface 48 Are defined.

The multiple external spline drive surfaces 48 each have a radially outermost edge 48A and a radially innermost edge 48B on. The external spline drive surface 48 extends from the radially outermost edge 48A up to the radially innermost edge 48B , A first reference circle is at the radially innermost edge 48B defined and is on the rotational center axis A1 centered. The first reference circle RC11 cuts the outer spline non-drive surface 50 at a reference point 50R , The maximum circumferential width MW1 extends from the radially innermost edge 48B to the reference point 50R in the circumferential direction D1 ,

The multiple external spline non-drive surfaces 50 each have a radially outermost edge 50A and a radially innermost edge 50B on. The outer spline non-drive surface 50 extends from the radially outermost edge 50A up to the radially innermost edge 50B , The reference point 50R is between the radially outermost edge 50A and the radially innermost edge 50B intended. The reference point 50R However, with the radially innermost edge 50B coincide.

A grand total of maximum circumferential widths MW1 is equal to or greater than 55 mm. The total of the maximum circumferential widths MW1 is equal to or greater than 60 mm. The total of the maximum circumferential widths MW1 is equal to or greater than 65 mm. In this embodiment, the total of the maximum circumferential widths is MW1 68 mm. The total of the maximum circumferential widths MW1 however, is not limited to this embodiment and the above ranges.

As in 12 to see, has the at least one external wedge tooth 40 an outer spline main diameter DM11 on. The external spline main diameter DM11 is equal to or greater than 25 mm. The external spline main diameter DM11 is equal to or greater than 29 mm. The external spline main diameter DM11 is equal to or less than 30 mm. In this embodiment, the outer spline main diameter is DM11 29.6 mm. The external spline main diameter DM11 however, is not limited to this embodiment and the above ranges.

The at least one external wedge tooth 40 has an outer spline diameter DM12 , The at least one external wedge tooth 40 has an outer spline base circle RC12 with the external spline diameter DM12 on. The external spline base circle RC12 however, may have a different diameter than the outer spline diameter DM12 exhibit. The outer spline diameter DM12 is equal to or less than 28 mm. The outer spline diameter DM12 is equal to or greater than 25 mm. The outer spline diameter DM12 is the same or greater than 27 mm. In this embodiment, the outer spline diameter is DM12 27.2 mm. The outer spline diameter DM12 however, is not limited to this embodiment and the above ranges.

The part 42 with the larger diameter has an outer diameter DM13 which is larger than the outer diameter of the outer spline main diameter DM11 is. The outer diameter DM13 is in the range between 32 mm and 40 mm. In this embodiment, the outer diameter is DM13 35 mm. The outer diameter DM13 however, is not limited to this embodiment.

As in 11 As can be seen, the plurality of outer spline drive surfaces 48 each a radial length RL11 from the radially outermost edge 48A up to the radially innermost edge 48B is defined. The total of the radial lengths RL11 the plurality of external spline driving surfaces 48 is equal to or greater than 7 mm. The total of the radial lengths RL11 is equal to or greater than 10 mm. The total of the radial lengths RL11 is equal to or greater than 15 mm. In this embodiment, the total sum of the radial lengths RL11 19.5 mm. The total of the radial lengths RL11 however, is not limited to this embodiment.

The several external splines 40 have an additional radial length RL12 on. The additional radial lengths RL12 are each from the outer spline base circle RC12 to the radially outermost ends 40A of the several external splines 40 Are defined. The total of the additional radial lengths RL12 is equal to or greater than 12 mm. In this embodiment, the sum total of the additional radial lengths RL12 31.85 mm. The total of the additional radial lengths RL12 however, is not limited to this embodiment.

At least one of the at least nine outer wedge teeth 40 has an asymmetrical shape with respect to a circumferential tooth tip centerline CL1 on. The circumferential tooth tip centerline CL1 is a line that is the center of rotation A1 and a circumferential center CP1 the radially outermost end 40A of the external spline 40 combines. However, at least one of the outer splines 40 a symmetrical shape with respect to the circumferential tooth tip centerline CL1 exhibit. The at least one of the at least nine outer wedge teeth 40 includes the external spline drive surface 48 and the outer spline non-drive surface 50 ,

The external spline drive surface 48 has a first external spline surface angle AG11 on. The first external spline surface angle AG11 is between the external spline drive surface 48 and a first radial line L11 Are defined. The first radial line L11 extends from the rotational center axis A1 the bicycle hub assembly 12 up to the radially outermost edge 48A the external spline drive surface 48 , The first outer slope angle PA11 or the second outer pitch angle PA12 is between the adjacent first radial lines L11 defined (see eg 9 ).

The outer spline non-drive surface 50 has a second external spline surface angle AG12 on. The second external spline surface angle AG12 is between the outer spline non-drive surface 50 and a second radial line L12 Are defined. The second radial line L12 extends from the rotational center axis A1 the bicycle hub assembly 12 up to the radially outermost edge 50A the outer spline non-drive surface 50 ,

In this embodiment, the second outer spline surface angle differs AG12 from the first outer spline surface angle AG11 , The first external spline surface angle AG11 is smaller than the second outer spline surface angle AG12 , However, the first outer spline surface angle AG11 equal to or larger than the second outer spline surface angle AG12 be.

The first external spline angle AG11 is in the range of 0 degrees to 10 degrees. The second external spline surface angle AG12 is in the range of 0 degrees to 60 degrees. In this embodiment, the first external spline surface angle is AG11 5 degrees. The second external spline surface angle AG12 is 45 degrees. The first external spline surface angle AG11 and the second external spline surface angle AG12 however, are not limited to this embodiment and the above ranges.

As in the 13 and 14 to see, the brake rotor support body has 34 at least one additional external spline 52 on, to engage with the bicycle brake rotor 16 ( 4 ) is set up. In this embodiment, the brake rotor support body 34 an additional basic carrier 54 and several additional external splines 52 on. The additional basic carrier 54 has a tubular shape and extends from the hub body 36 along the rotational center axis A1 , The additional external spline 52 extends from the additional base support 54 radially outward. A total number of additional external splines 52 is 52. The total number of additional External splines 52 however, is not limited to this embodiment.

As in 14 to see, the at least one additional external spline tooth has an additional external spline main diameter DM14 on. As in 15 to see is the additional external spline main diameter DM14 larger than the outer spline main diameter DM11 , The additional external spline main diameter DM14 is essentially equal to the outer diameter DM13 of the part 42 with the larger diameter. However, the additional outer spline main diameter DM14 equal to or smaller than the outer spline main diameter DM11 be. The additional external spline main diameter DM14 can be different from the outside diameter DM13 of the part 42 differ with the larger diameter.

As in 16 to see includes the hub axle 30 an axial contact surface 30B1 to the bicycle frame BF to contact. In this embodiment, the axial contact surface 30B1 with the first frame BF1 of the bicycle frame BF contactable. The first frame BF1 has a frame contact surface BF12 on. The axial contact surface 30B1 is in a state in which the bicycle hub assembly 12 on the bicycle frame BF with the wheel attachment structure WS is attached to the frame contact surface BF12 in contact.

A first axial length AL11 is from the axial contact surface 30B1 up to the part 42 with larger diameter in the axial direction D2 with respect to the rotational center axis A1 Are defined. The first axial length AL11 ranges from 35 mm to 41 mm. The first axial length AL11 can be equal to or greater than 39 mm. The first axial length AL11 can also be in the range of 35 mm to 37 mm. In this embodiment, the first axial length is AL11 36.2 mm. The first axial length AL11 however, is not limited to this embodiment and the above ranges.

The part 42 with the larger diameter has an axial end 42A on, in the axial direction D2 furthest from the axial contact surface 30B1 is removed. A second axial length AL12 is from the axial contact surface 30B1 to the axial end 42A in the axial direction D2 Are defined. The second axial length AL12 ranges from 38 mm to 47 mm. The second axial length AL12 can range from 44 mm to 45 mm. The second axial length AL12 can also be in the range of 40 mm to 41 mm. In this embodiment, the second axial length is AL12 40.75 mm. The second axial length AL12 however, is not limited to this embodiment and the above ranges.

An axial length AL13 of the part 42 with larger diameter is in the range of 3 mm to 6 mm. In this embodiment, the axial length is AL13 4.55 mm. The axial length AL13 however, is not limited to this embodiment and the above ranges.

As in 17 to see includes the rear Fahrradkettenradanordnung 14 at least one sprocket. The at least one sprocket comprises a smallest sprocket SP1 and a largest sprocket SP12 , The smallest sprocket SP1 can also be used as a sprocket SP1 be designated. The biggest sprocket SP12 can also be used as a sprocket SP12 be designated. In this embodiment, the at least one sprocket further comprises sprockets SP2 to SP11 , The sprocket SP1 corresponds to the highest gear. The sprocket SP12 corresponds to a low gear. A total number of sprockets of the rear bicycle sprocket assembly 14 is not limited to this embodiment.

The smallest sprocket SP1 includes at least one sprocket tooth SP1B , A total of at least one sprocket tooth SP1B the smallest sprocket SP1 is equal to or less than 10 , In this embodiment, the total number of the at least one sprocket tooth SP1B the smallest sprocket SP1 equal to 10. The total number of at least one sprocket tooth SP1B the smallest sprocket SP1 however, it is not limited to this embodiment and the above range.

The biggest sprocket SP12 includes at least one sprocket tooth SP12B , A total of at least one sprocket tooth SP12B the largest sprocket SP12 is equal to or greater than 46 , The total number of at least one sprocket tooth SP12B the largest sprocket SP12 is equal to or greater than 50 , In this embodiment, the total number of the at least one sprocket tooth SP12B the largest sprocket SP12 51 , However, the total number of the at least one sprocket tooth is SP12B of the largest sprocket SP12 is not limited to this embodiment and the above ranges.

The sprocket SP2 includes at least one sprocket tooth SP2B , The sprocket SP3 includes at least one sprocket tooth SP3b , The sprocket SP4 includes at least one sprocket tooth SP4B , The sprocket SP5 includes at least one sprocket tooth SP5B , The sprocket SP6 includes at least one sprocket tooth SP6B , The sprocket SP7 includes at least one sprocket tooth SP7B , The sprocket SP8 includes at least one sprocket tooth SP8B , The sprocket SP9 includes at least one sprocket tooth SP9B , The sprocket SP10 includes at least one sprocket SP10B , The sprocket SP11 includes at least one sprocket tooth SP11B ,

A total of at least one sprocket tooth SP2B is 12 , A total of at least one sprocket tooth SP3b is 14 , A total of at least one sprocket tooth SP4B is 16 , A total of at least one sprocket tooth SP5B is 18 , A total of at least one sprocket SP6B is 21 , A total of at least one sprocket tooth SP7B is 24 , A total of at least one sprocket tooth SP8B is 28 , A total of at least one sprocket tooth SP9B is 33 , A total of at least one sprocket tooth SP10B is 39 , A total of at least one sprocket tooth SP11B is 45 , The total number of sprocket teeth SP2 to SP11 is not limited to this embodiment.

As in 18 to see are the sprockets SP1 to SP12 separate elements. At least one of the sprockets SP1 to SP12 However, at least partially integral with another of the sprockets SP1 to SP12 be provided. The rear bicycle sprocket assembly 14 includes a sprocket mount 56 , several spacers 58 , a first ring 59A and a second ring 59B , The sprockets SP1 to SP12 are in the illustrated embodiment on the Kettenradhalterung 56 appropriate.

As in 19 to see includes the sprocket SP1 a sprocket body SP1A and the multiple sprocket teeth SP1B , The multiple sprocket teeth SP1B extend from the sprocket body SP1A radially outward. The sprocket SP2 includes a sprocket body SP2A and the multiple sprocket teeth SP2B , The multiple sprocket teeth SP2B extend from the sprocket body SP2A radially outward. The sprocket SP3 includes a sprocket body SP3A and the multiple sprocket teeth SP3b , The multiple sprocket teeth SP3b extend from the sprocket body SP3A radially outward. The sprocket SP4 includes a sprocket body SP4A and the multiple sprocket teeth SP4B , The multiple sprocket teeth SP4B extend from the sprocket body SP4A radially outward. The sprocket SP5 includes a sprocket body SP5A and the multiple sprocket teeth SP5B , The multiple sprocket teeth SP5B extend from the sprocket body SP5A radially outward. The first ring 59A is between the sprockets SP3 and SP4 intended. The second ring 59B is between the sprockets SP4 and SP5 intended.

As in 20 to see includes the sprocket SP6 a sprocket body SP6A and the multiple sprocket teeth SP6B , The plurality of sprocket teeth SP6B extend from the sprocket body SP6A radially outward. The sprocket SP7 includes a sprocket body SP7A and the multiple sprocket teeth SP7B. The multiple sprocket teeth SP7B extend from the sprocket body SP7A radially outward. The sprocket SP8 includes a sprocket body SP8A and the multiple sprocket teeth SP8B , The multiple sprocket teeth SP8B extend from the sprocket body SP8A radially outward.

As in 21 to see includes the sprocket SP9 a sprocket body SP9A and the multiple sprocket teeth SP9B , The multiple sprocket teeth SP9B extend from the sprocket body SP9A radially outward. The sprocket SP10 includes a sprocket body SP10A and the multiple sprocket teeth SP10B , The multiple sprocket teeth SP10B extend from the sprocket body SP10A radially outward. The sprocket SP11 includes a sprocket body SP11A and the multiple sprocket teeth SP11B , The multiple sprocket teeth SP11B extend from the sprocket body SP11A radially outward. The sprocket SP12 includes a sprocket body SP12A and the multiple sprocket teeth SP12B , The multiple sprocket teeth SP12B extend from the sprocket body SP12A radially outward.

As in 22 to see includes the sprocket bracket 56 a hub engaging portion 60 and several support arms 62 , The multiple support arms 62 extend from the hub engaging portion 60 radially outward. The support arm 62 includes a first to eighth attachment part 62A to 62H , The several spacers 58 have several first spacers 58A , several second spacers 58B , several third spacers 58C , several fourth spacers 58D , several fifth spacers 58E , several sixth spacers 58F and several seventh spacers 58G on.

As in 23 to see are the first spacers 58A between the sprockets SP5 and SP6 intended. The second spacers 58B are between the sprockets SP6 and SP7 intended. The third spacers 58C are between the sprockets SP7 and SP8 intended. The fourth spacers 58D are between the sprockets SP8 and SP9 intended. The fifth spacers 58E are between the sprockets SP9 and SP10 intended. The sixth spacers 58F are between the sprockets SP10 and SP11 intended. The seventh spacers 58G are between the sprockets SP11 and SP12 intended.

The sprocket SP6 and the first spacer 58A are at the first one attachment section 62A attached with a bonding structure, such as an adhesive. The sprocket SP7 and the second spacer 58B are at the second attachment portion 62B attached with a bonding structure such as an adhesive. The sprocket SP8 and the third spacer 58C are at the third attachment portion 62C attached with a bonding structure such as an adhesive. The sprocket SP9 and the spacer 58D are at the fourth attachment portion 62D attached with a bonding structure such as an adhesive. The sprocket SP10 and the fifth spacer 58E are at the fifth attachment portion 62E attached with a bonding structure such as an adhesive. The sprocket SP11 and the sixth spacer 58F are at the sixth attachment portion 62F attached with a bonding structure such as an adhesive. The sprocket SP12 and the seventh spacer 58G are at the seventh attachment section 62G attached with a bonding structure such as an adhesive. The sprocket SP5 and the second ring 59B are at the eighth attachment portion 62H attached with a bonding structure such as an adhesive. The hub engagement section 60 , the sprockets SP1 to SP4 , the first ring 59A , the second ring 59B be in the axial direction D2 between the part 42 with the larger diameter and the locking flange 32B of the locking ring 32 held.

In this embodiment, each of the springs SP1 to SP12 made of a metallic material such as aluminum, iron or titanium. Each of the sprocket holders 56 , the first to seventh spacer 58A to 58G , the first ring 59A and the second ring 59B are made of a non-metallic material such as a resin material. However, at least one of the springs SP1 until at least partially made of a non-metallic material. At least one of the sprocket brackets 56 , the first to seventh spacer 58A to 58G , the first ring 59A and the second ring 59B may be at least partially made of a metallic material, such as aluminum, iron or titanium.

The at least one sprocket has at least one internal spline for engagement with the bicycle hub assembly 12 is set up. As in 24 and 25 To see, the at least one sprocket at least ten internal splines, which are for engagement with the bicycle hub assembly 12 are set up. The at least one internal spline has a plurality of internal splines. Thus, the at least one sprocket has a plurality of internal splines that engage with the bicycle hub assembly 12 are formed. In this embodiment, the sprocket SP1 at least ten inner splines 64 on, for engagement with the bicycle hub assembly 12 are set up. In this embodiment, the sprocket SP1 the internal splines 64 which are set up with the outer wedge teeth 40 the sprocket support 28 the bicycle hub assembly 12 to comb. The sprocket body SP1A has an annular shape. The internal splines 64 extend from the sprocket body SP1A radially inward.

As in 26 to see, the total number of internal splines is equal to or greater than 20 , The total number of internal splines is equal to or greater than 25 , In this embodiment, the total number of internal splines 64 26 , However, the total number of internal splines is not limited to these embodiments and the above ranges.

The at least ten internal splines 64 have a first inner pitch angle PA21 and a second inner pitch angle PA22 on. At least two internal splines of the multiple internal splines 64 are in the circumferential direction at a first inner pitch angle PA21 with respect to the rotational center axis A1 the rear bicycle sprocket assembly 14 arranged. At least two internal splines of the multiple internal splines 64 are in the circumferential direction at a second inner pitch angle PA22 with respect to the rotational center axis A1 arranged. In this embodiment, the second inner pitch angle is different PA22 from the first inner pitch angle PA21 , The second inner pitch angle PA22 however, may be substantially equal to the first inner pitch angle PA21 be.

In this embodiment, the internal splines are 64 in the circumferential direction in the first inner pitch angle PA21 in the circumferential direction D1 arranged. Two internal splines of the internal splines 64 are in the second inner pitch angle PA22 in the circumferential direction D1 arranged. However, at least two internal splines of the internal splines can 64 in another inner pitch angle in the circumferential direction D1 be arranged.

The first inner pitch angle PA21 ranges from 10 degrees to 20 degrees. The first inner pitch angle PA21 ranges from 12 degrees to 15 degrees. The first inner pitch angle PA21 ranges from 13 degrees to 14 degrees. In this embodiment, the first inner pitch angle PA21 13.3 degrees. The first inner pitch angle PA21 however, is not limited to this embodiment and the above ranges.

The second inner pitch angle PA22 is in the range of 5 degrees to 30 degrees. In this embodiment, the second inner pitch angle is PA22 26 degrees. The second inner pitch angle PA22 however, it is not limited to this embodiment and the above range.

At least one of the at least ten inner splines 64 has a first spline shape different from a second spline shape of another of the at least ten inner splines 64 different. At least one of the at least ten inner splines 64 has a first spline size that is different from a second spline size of another of the at least ten inner splines 64 different. At least one of the at least ten internal splines 64 has a cross-sectional shape extending from a cross-sectional shape of another of the at least ten inner splines 64 different. As in 27 can be seen, the internal splines 64 however, have the same shape. The internal splines 64 can be the same size The internal splines 64 may have the same cross-sectional shape.

As in 28 to see the at least one internal spline 64 an internal spline drive surface 66 and an internal spline non-drive surface 68 , The at least one internal spline 64 includes several internal splines 64 , The several internal splines 64 include a plurality of internal spline drive surfaces 66 to drive torque during pedal operation F1 from the bicycle hub assembly 12 ( 6 ). The several internal splines 64 include a plurality of internal spline non-drive surfaces 68 , The internal spline drive surface 66 is with the sprocket support body 28 contactable to the drive torque F1 during the pedal operation of the sprocket SP1 to the sprocket support body 28 transferred to. The internal spline drive surface 66 is the driving direction D11 facing. The internal spline non-drive surface 68 is on a reverse side of the internal spline drive surface 66 in the circumferential direction D1 intended. The internal spline non-drive surface 68 is the reverse direction D12 turned to not drive torque during pedal operation F1 from the sprocket SP1 to the sprocket support body 28 transferred to.

The at least ten internal splines 64 each have maximum circumferential widths MW2 on. The internal splines 64 have maximum circumferential widths MW2 on. The maximum circumferential width MW2 is defined as a maximum width to one on the internal spline 64 applied pressure force F3 record. The maximum circumferential width MW2 is as a straight distance based on the internal spline drive surface 66 Are defined.

The internal spline drive surface 66 has a radially outermost edge 66A and a radially innermost edge 66B on. The internal spline drive surface 66 extends from the radially outermost edge 66A up to the radially innermost edge 66B , A second reference circle RC21 is at the radially outermost edge 66A defined and is on the rotational center axis A1 centered. The second reference circle RC21 cuts the internal spline non-drive surface 68 at a reference point 68R , The maximum circumferential width MW2 extends in the circumferential direction D1 from the radially innermost edge 66B to the reference point 68R ,

The outer spline non-drive surface 68 has a radially outermost edge 68A and a radially innermost edge 68B on. The outer spline non-drive surface 68 extends from the radially outermost edge 68A up to the radially innermost edge 68B , The reference point 68R is between the radially outermost edge 68A and the radially innermost edge 68B intended.

A grand total of maximum circumferential widths MW2 is equal to or greater than 40 mm. The total of the maximum circumferential widths MW2 is equal to or greater than 45 mm. The total sum of the maximum circumferential widths MW2 is equal to or greater than 50 mm. In this embodiment, the total sum of the maximum circumferential widths MW2 is 50.8 mm. However, the total sum of the maximum circumferential widths MW2 is not limited to this embodiment.

As in 29 To see, has the at least one internal spline 64 an internal spline main diameter DM21 , The at least one internal spline has an internal spline base circle RC22 with the internal spline major diameter DM21 , The internal spline foot circle RC22 however, may be one of the major internal spline diameter DM21 have different diameters. The internal spline main diameter DM21 is equal to or less than 30 mm. The internal spline main diameter DM21 is equal to or greater than 25 mm. The internal spline major diameter DM21 is equal to or greater than 29 mm. In this embodiment, the major internal spline diameter is DM21 29.8 mm. However, the major internal spline diameter r DM21 not limited to this embodiment and the above ranges.

The at least one internal spline 64 has an internal spline diameter DM22 equal to or less than 28 mm. The internal spline outside diameter DM22 is equal to or greater than 25 mm. The internal spline outside diameter DM22 is the same or greater than 27 mm. In this embodiment, the internal spline is the minor diameter DM22 27.7 mm. However, the internal spline is the minor diameter DM22 not limited to this embodiment and the above ranges.

As in 28 to see have the multiple internal spline drive surfaces 66 the radially outermost edge 66A and the radially innermost edge 66B on. The multiple internal spline drive surfaces 66 each comprise a radial length RL21 from the radially outermost edge 66A up to the radially innermost edge 66B is defined. A total of radial lengths RL21 the plurality of internal spline drive surfaces 66 is equal to or greater than 7 mm. The total of the radial lengths RL21 is equal to or greater than 10 mm. The total of the radial lengths RL21 is equal to or greater than 15 mm. In this embodiment, the total sum of the radial lengths RL21 19.5 mm. The total of the radial lengths RL21 however, is not limited to this embodiment and the above ranges.

The several internal splines 64 have an additional radial length RL22 on. The additional radial lengths RL22 are each from the internal spline root circle RC22 up to radially innermost ends 64A of the several internal splines 64 Are defined. A total of additional radial lengths RL22 is equal to or greater than 12 mm. In this embodiment, the sum total of the additional radial lengths RL22 27.95 mm. The total of the additional radial lengths RL22 however, is not limited to this embodiment and the above ranges.

At least one of the internal splines 64 has an asymmetrical shape with respect to a circumferential tooth tip central axis CL2 on. The circumferential tooth tip centerline CL2 is a line that is the center of rotation A1 and a circumferential center CP2 the radially innermost end 64A of the internal spline 64 combines. However, at least one of the internal splines 64 a symmetrical shape with respect to the circumferential tooth tip centerline CL2 exhibit. The at least one of the internal splines 64 includes the internal spline drive surface 66 and the internal spline non-drive surface 68 ,

The internal spline drive surface 66 has a first internal spline surface angle AG21 on. The first internal spline surface angle AG21 is between the internal spline drive surface 66 and a first radial line L21 Are defined. The first radial line L21 extends from the rotational center axis A1 the rear bicycle sprocket assembly 14 up to the radially outermost edge 66A the internal spline drive surface 66 , The first inner pitch angle PA21 or the second inner pitch angle PA22 is between adjacent first radial lines L21 (see eg 26 ) Are defined.

The internal spline non-drive surface 68 has a second internal spline surface angle AG22 on. The second internal spline surface angle AG22 is between the internal spline non-drive surface 68 and a second radial line L22 Are defined. The second radial line L22 extends from the rotational center axis A1 the rear bicycle sprocket assembly 14 up to the radially outermost edge 68A the internal spline non-drive surface 68 ,

In this embodiment, the second internal spline surface angle differs AG22 from the first internal spline surface angle AG21 , The first internal spline surface angle AG21 is smaller than the second internal spline surface angle AG22 , The first internal spline surface angle AG21 however, may be equal to or greater than the second internal spline surface angle AG22 be.

The first internal spline surface angle AG21 is in the range of 0 degrees to 10 degrees. The second internal spline surface angle AG22 is in the range of 0 degrees to 60 degrees. In this embodiment, the first internal spline surface angle is AG21 5 degrees. The second internal spline surface angle AG22 is 45 degrees. However, the first internal spline surface angle is AG21 and the second internal spline surface angle AG22 not limited to this embodiment and the above ranges.

As in 30 to see, comb the internal splines 64 with the external wedge teeth 40 to the drive torque F1 from the sprocket SP1 to the sprocket support body 28 transferred to. The internal spline drive surface 66 can with the external spline drive surface 48 be brought into contact with the drive torque F1 from the sprocket SP1 to the sprocket support body 28 transferred to. The internal spline non-drive surface 68 is from the outer spline non-drive surface 50 spaced apart in a state in which the internal spline drive surface 66 with the external spline drive surface 48 is in contact.

As in 31 can be seen, points the sprocket SP2 several internal splines 70 on. The sprocket SP3 has several internal splines 72 on. The sprocket SP4 has several internal splines 74 on. The first ring 59A has several internal splines 76 on. As in 32 to see includes the hub engaging portion 60 the sprocket holder 56 several internal splines 78 , The several internal splines 70 have substantially the same structure as the plurality of internal splines 64 on. The several internal splines 72 have substantially the same structure as the plurality of internal splines 64 on. The several internal splines 74 have substantially the same structure as the plurality of internal splines 64 on. The several internal splines 76 have substantially the same structure as the plurality of internal splines 64 on. The several internal splines 78 have substantially the same structure as the inner inner splines 64 on. They are therefore not described in detail here for the sake of brevity.

The term "comprising" and its derivatives, as used herein, are to be understood as open-ended terms that specify the presence of said features, elements, components, groups, integers and / or steps, the presence of other unnamed features, elements But do not exclude components, groups, integers, and / or steps. This concept also applies to words with similar meanings, such as the terms "with", "have", and their derivatives.

The terms "limb", "section", "section", "part", "element", "body" and "structure", when used in the singular, may have the dual meaning of a single part or multiple parts.

The ordinal numbers such as "first (s)", "second (s)" as given in the present application are merely identifiers, but have no other meaning such as a particular order or the like. Moreover, for example, the term "first element" itself does not imply the existence of a "second element" and the term "second element" does not itself imply the existence of a "first element".

The term "pair of" as used herein may include the configuration in which the pair of elements have different shapes or structures from each other in addition to the configuration in which the pair of elements have the same shapes or structures.

The terms "a" (or "a"), "one or more" and "at least one" may be used interchangeably herein.

Finally, the terms of degree such as "substantially", "about" and "approximately" as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. All numerical values described in this application can be construed to include "substantially," "about," and "about."

Obviously, many modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 15/608924 [0001]
• US 15/608915 [0001]

Claims (29)

Rear bicycle sprocket assembly comprising: at least one sprocket having at least ten internal splines adapted for engagement with a bicycle hub assembly. Rear bicycle sprocket arrangement behind Claim 1 wherein a total number of the at least ten internal splines is equal to or greater than 20, preferably equal to or greater than 25. Rear bicycle sprocket arrangement behind Claim 1 or 2 wherein the at least ten inner splines have a first inner pitch angle and a second inner pitch angle different from the first inner pitch angle. Rear bicycle sprocket assembly after one of the Claims 1 to 3 wherein at least one of the at least ten inner splines has a shape that is different from a shape of another of the at least ten inner splines. Rear bicycle sprocket assembly after one of the Claims 1 to 4 wherein at least one of the at least ten inner splines has a first spline size that is different than a second spline size of another of the at least ten inner splines. Rear sprocket assembly according to one of Claims 1 to 5 wherein the at least ten inner splines have an internal spline major diameter equal to or greater than 25 mm, preferably equal to or greater than 29 mm. Rear bicycle sprocket assembly after one of the Claims 1 to 6 wherein the at least ten inner splines have an inner spline diameter equal to or greater than 25 mm, preferably equal to or greater than 27 mm. Rear bicycle sprocket assembly after one of the Claims 1 to 7 wherein the at least ten inner splines comprise a plurality of internal spline drive surfaces for receiving drive torque from the bicycle hub assembly during pedaling, the plurality of inner spline drive surfaces each including a radially outermost edge, a radially innermost edge, and a radial length extending from the radially outermost edge Edge is defined to the radially innermost edge, and a total sum of the radial lengths of the plurality of internal spline drive surfaces is equal to or greater than 7 mm, preferably equal to or greater than 10 mm, more preferably equal to or greater than 15 mm. Rear bicycle sprocket assembly after one of the Claims 1 to 8th wherein at least two inner splines of the at least ten inner splines are circumferentially disposed at a first inner lead angle with respect to a rotational center axis of the rear bicycle sprocket assembly, and the first inner lead angle is in the range of 10 degrees to 20 degrees, preferably 12 degrees to 15 degrees, more preferably from 13 degrees to 14 degrees. Rear bicycle sprocket arrangement behind Claim 9 wherein at least two inner splines of the at least ten inner splines are circumferentially disposed at a second inner pitch angle with respect to the rotational center axis and the second inner pitch angle is different from the first inner pitch angle. Rear bicycle sprocket assembly after one of the Claims 1 to 10 wherein the at least ten inner splines comprise an inner spline drive surface having a first inner spline surface angle defined between the inner spline drive surface and a first radial line extending from a rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the internal spline drive surface ; and an internal splined non-drive surface having a second internal spline surface angle defined between the internal spline non-drive surface and a second radial line extending from the rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the internal splined non-drive surface, wherein the second internal splined surface angle of the first internal spline surface angle. Rear bicycle sprocket arrangement behind Claim 11 wherein one or more of the following conditions is met: a) the first internal spline surface angle is less than the second internal spline surface angle; b) the first internal spline surface angle is in the range of 0 degrees to 10 degrees; and c) the second internal spline surface angle is in the range of 0 degrees and 60 degrees. A second rear bicycle sprocket assembly comprising: at least one sprocket having a plurality of internal splines adapted for engagement with a bicycle hub assembly, wherein at least two inner splines of the plurality of inner splines are circumferentially disposed at a first inner lead angle with respect to a rotational center axis of the rear bicycle sprocket assembly, the first inner lead angle being in the range of 10 degrees to 20 degrees, preferably 12 degrees to 15 degrees, more preferably 13 degrees to 14 degrees. Rear bicycle sprocket arrangement behind Claim 13 wherein at least two inner splines of the plurality of inner splines are circumferentially disposed at a second inner lead angle with respect to the rotational center axis, and the second inner lead angle is different from the first inner lead angle. Rear bicycle sprocket assembly comprising: at least one sprocket having at least one internal spline adapted to engage a bicycle hub assembly, the at least one internal spline having an internal spline major diameter equal to or less than 30 mm. Rear bicycle sprocket arrangement behind Claim 15 in which the internal spline main diameter is equal to or greater than 25 mm, preferably equal to or greater than 29 mm. Rear bicycle sprocket arrangement behind Claim 16 wherein the at least one internal spline has an internal spline diameter equal to or less than 28 mm. Rear bicycle sprocket arrangement behind Claim 17 wherein the internal spline diameter is equal to or greater than 25 mm, preferably equal to or greater than 27 mm. Rear bicycle sprocket assembly after one of the Claims 15 to 18 wherein the at least one internal spline includes a plurality of internal splines having a plurality of internal spline drive surfaces for receiving drive torque from the bicycle hub assembly during pedaling, the plurality of internal spline drive surfaces each including a radially outermost edge, a radially innermost edge, and a radial length; is defined from the radially outermost edge to the radially innermost edge, and a total sum of the radial lengths of the plurality of internal spline driving surfaces is equal to or greater than 7 mm, preferably equal to or greater than 10 mm, more preferably equal to or greater than 15 mm. Rear bicycle sprocket assembly comprising: at least one sprocket having at least one internal spline adapted for engagement with a bicycle hub assembly, the at least one internal spline comprising: an internal spline drive surface having a first internal spline surface angle defined between the internal spline drive surface and a first radial line extending from a rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the internal spline drive surface; and an inner splined non-drive surface having a second inner spline surface angle defined between the inner spline non-drive surface and a second radial line extending from the rotational center axis of the rear bicycle sprocket assembly to a radially outermost edge of the inner splined non-drive surface, the second inner spline surface angle subtending the second inner spline surface angle first internal spline surface angle different. Rear bicycle sprocket arrangement behind Claim 20 wherein the first internal spline surface angle is less than the second internal spline surface angle. Rear bicycle sprocket arrangement behind Claim 20 or 21 wherein the first internal spline surface angle is in the range of 0 degrees to 10 degrees; and / or the second internal spline surface angle is in the range of 0 degrees to 60 degrees. Rear bicycle sprocket assembly after one of the Claims 1 to 22 wherein the at least one sprocket has a smallest sprocket with at least one sprocket tooth and a total number of the at least one sprocket tooth of the smallest sprocket is equal to or less than ten. Rear bicycle sprocket assembly after one of the Claims 1 to 23 wherein the at least one sprocket comprises a largest sprocket having at least one sprocket tooth and a total number of the at least one sprocket tooth of the largest sprocket is equal to or greater than 46, preferably equal to or greater than 50. Rear bicycle sprocket assembly after one of the Claims 1 to 24 , further comprising a sprocket mount to which the at least one sprocket is attached, the sprocket mount preferably being made of a non-metallic material comprising a resinous material. A bicycle powertrain, comprising: the rear bicycle sprocket assembly of any one of Claims 1 to 12 or one of the Claims 23 to 25 if this one of the Claims 1 to 12 depend; and a bicycle hub assembly comprising a sprocket support body having at least ten outer splines adapted for engagement with the rear bicycle sprocket assembly, each of the at least ten outer splines having an outer spline drive surface and an outer spline non-drive surface. A bicycle powertrain comprising: the rear bicycle sprocket assembly according to Claim 13 or 14 or one of the Claims 23 to 25 when they are from Claim 13 or 14 depend; and a bicycle hub assembly comprising a sprocket support body having a plurality of outer splines adapted for engagement with the rear bicycle sprocket assembly, wherein at least two outer splines of the plurality of outer splines are circumferentially disposed at a first outer pitch angle with respect to a rotational center axis of the bicycle hub assembly, wherein the first outer pitch angle in the range of 10 degrees to 20 degrees. A bicycle powertrain, comprising: the rear bicycle sprocket assembly of any one of Claims 15 to 19 or one of the Claims 23 to 25 if from one of the Claims 15 to 19 depend; and a bicycle hub assembly comprising a sprocket support body having at least one outer spline tooth adapted for engagement with the rear bicycle sprocket assembly, the at least one outer spline having an outer spline major diameter equal to or less than 30 mm. A bicycle powertrain, comprising: the rear bicycle sprocket assembly of any one of Claims 20 to 22 or one of the Claims 23 to 25 if from one of the Claims 20 to 22 depend; and a bicycle hub assembly comprising a sprocket support body having at least nine outer splines adapted for engagement with the rear bicycle sprocket assembly, wherein at least one of the at least nine outer splines has an asymmetrical shape with respect to a circumferential spike centerline, the at least one of the at least nine outer splines comprising an outer spline drive surface having a first outer spline surface angle defined between the outer spline drive surface and a first radial line extending from a rotational center axis of the bicycle hub assembly to a radially innermost edge of the outer spline drive surface; and an outer spline non-drive surface having a second outer spline surface angle defined between the outer spline non-drive surface and a second radial line extending from the rotational center axis of the bicycle hub assembly to a radially innermost edge of the outer spline drive surface, the second outer spline surface angle subtending from the outer spline surface angle first outer spline surface angle.

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