CN110077518B - Dental tray, dental tray assembly and bicycle - Google Patents
Dental tray, dental tray assembly and bicycle Download PDFInfo
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- CN110077518B CN110077518B CN201910299260.6A CN201910299260A CN110077518B CN 110077518 B CN110077518 B CN 110077518B CN 201910299260 A CN201910299260 A CN 201910299260A CN 110077518 B CN110077518 B CN 110077518B
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- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 4
- 208000016261 weight loss Diseases 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 4
- 241000239290 Araneae Species 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a toothed disc, a toothed disc assembly and a bicycle, wherein the toothed disc comprises a toothed disc main body, a plurality of stages of gear teeth are arranged on the periphery of the toothed disc main body, tooth grooves are formed between two adjacent gear teeth, and concave positions matched with sleeve rollers of a chain are arranged on one side wall or two side walls of the gear teeth; the dental tray component is provided with the dental tray; the bicycle is provided with the crankset assembly. According to the chain wheel, the chain wheel assembly and the bicycle, when the chain is pulled by the sleeve roller of the chain, the sleeve roller of the chain is clamped in the concave position, so that the contact area is increased, the pressure intensity on the side wall of the gear tooth is reduced, the problem of the inward sinking of the side wall of the gear tooth can be effectively overcome, the service life is prolonged, the two defects of a traditional structure can be well overcome by combining the mode of heightening the gear tooth adopted in the market, the maintenance and use cost of the bicycle is reduced, the convenience is improved, and the practicability is high.
Description
Technical Field
The invention belongs to the technical field of bicycles, and particularly relates to a dental tray, a dental tray assembly adopting the dental tray and a bicycle adopting the dental tray assembly.
Background
The tooth disc assembly of the bicycle comprises a tooth disc, a middle shaft, a left crank and a right crank, wherein the left crank and the right crank are respectively arranged at two ends of the middle shaft, and the tooth disc is arranged on the middle shaft or on the left crank (or the right crank). The chain is wound on the chain wheel, the middle shaft is driven to rotate by pedaling the tail ends of the left crank and the right crank, and further the chain is driven, and the rear wheel is driven by the chain. When the toothed disc rotates to drive the rear wheel to rotate, the rear wheel applies a reaction force (namely resistance) to the toothed disc through the chain, and the resistance mainly acts on the gear teeth at the upper end of the toothed disc (the forward gear teeth of the traction chain) in the length direction of the chain and acts on the side wall of the advancing direction of the gear teeth, so that each gear tooth passing through the upper end of the toothed disc can receive a larger tangential acting force in the working process, and one of the following two defects can occur in the gear teeth at the peripheral side of the toothed disc after a certain working time:
firstly, because the root of the tooth groove between two adjacent teeth on the tooth disc is an arc surface with a curvature radius slightly larger than that of the chain sleeve roller, and the side wall is a plane tangent to the arc surface, tooth grooves with wider centrifugal ends and narrower near-center ends are formed, and the tooth grooves are in equal line contact with the chain sleeve roller, according to p=f/S (P is the pressure born by the side wall of the tooth groove, F is the chain resistance, S is the contact area between the tooth groove and the chain sleeve roller), wherein s=l×d (L is the contact arc length of the chain sleeve roller and the side wall of the tooth groove, and d is the contact surface width), and therefore p=f/(l×d). Because the sleeve roller of the chain is in line contact with the tooth slot, the contact arc length L is extremely small, so that the pressure P born by the gear teeth is relatively large, after a certain period of work, the side wall of the advancing direction of the gear teeth and the sleeve roller of the chain are excessively worn or are subjected to relatively strong pressure for a long time to sink inwards, so that the sleeve roller of the chain can be clamped into the sinking concave position and cannot be separated from the sinking concave position in time, the flexibility and the efficiency of chain transmission are affected, the width of the gear teeth is reduced after the excessive wear, the strength of the gear teeth is weakened, and the gear teeth are easy to deform.
Secondly, the tail ends of the gear teeth deform towards the direction of the resistance, so that the chain sleeve roller cannot be well pulled, and the phenomenon of tooth jump exists in the rotation process, so that the transmission efficiency is affected.
Therefore, the dental tray needs to be replaced periodically in the actual use process, which not only increases the use and maintenance cost of the bicycle, but also improves the use inconvenience of the bicycle.
In order to overcome the problem of tooth jump, manufacturers on the market at present basically realize the tooth jump through a mode of heightening the tooth disc gear teeth. However, as the tooth structure of the tooth disc is not improved, the contact area between the chain sleeve roller and the tooth groove is still smaller in the actual working process, so that the side wall of the tooth in the advancing direction still receives larger pressure, the first defect can not be overcome due to heightening of the tooth, and the improvement effect is limited.
Disclosure of Invention
In order to solve the above problems, the present invention provides a toothed disc capable of increasing the contact area between a chain sleeve roller and a tooth slot side wall by improving the tooth structure, thereby reducing the pressure and overcoming the defect of the inward sinking of the tooth side wall, a toothed disc assembly comprising the toothed disc, and a bicycle comprising the toothed disc assembly.
The invention provides a toothed disc, which comprises a toothed disc main body, wherein a plurality of gear teeth are arranged on the peripheral side of the toothed disc main body, tooth grooves are formed between two adjacent gear teeth, and concave positions matched with sleeve rollers of a chain are arranged on one side wall or two side walls of the gear teeth.
Optionally, the cross section profile of the concave position is a smooth curve, and the curvature radius of the curve is matched with the sleeve roller radius of the chain.
Optionally, the cross-section profile of the concave position is a smooth curve, the curve is provided with a plurality of arc sections with different curvature radii, and the curvature radius of at least one arc section is matched with the sleeve roller radius of the chain.
Optionally, the centers of curvature radii of the arc sections are all located on the same side of the curve.
Optionally, the proximal end and the distal end of the concave position are in smooth transition with the tooth slot.
Optionally, the dental tray main body includes a spoke and a gear ring detachably mounted on the spoke, and the gear teeth are disposed on a peripheral side of the gear ring.
Optionally, the outside of spoke is provided with a plurality of spoke convex parts around the axle center, the inboard of ring gear corresponds the spoke convex part and is provided with a plurality of lock concave parts, the spoke convex part can be followed axial direction and pressed into in the lock concave part.
Optionally, the circumference side of spoke is formed with a plurality of protruding shaping concave positions along axial direction indent, forms a spoke protruding portion between two adjacent protruding shaping concave positions, is formed with the ring gear protruding portion that matches with protruding shaping concave position between two adjacent lock concave positions.
Optionally, the spoke includes the inner spoke circle and outer spoke circle of coaxial distribution and sets up and be used for connecting a plurality of spokes of two between inner spoke circle and outer spoke circle, protruding shaping concave position sets up in one side of outer spoke circle, another side of outer spoke circle is provided with first weight-reducing groove.
Optionally, the spoke is made of light materials such as aluminum alloy, carbon fiber or magnesium alloy, and the gear ring is made of steel.
On the other hand, the invention also provides a dental tray assembly, which comprises a central shaft, a left crank, a right crank and the dental tray with the structure, wherein the left crank and the right crank are respectively arranged at two ends of the central shaft, and the dental tray is arranged on the central shaft.
And, still provide a bicycle, including frame and the guide system, the actuating system and the braking system that set up on the frame, actuating system is provided with the tooth disc subassembly of above-mentioned structure.
The beneficial effects of the invention are as follows: the concave position matched with the sleeve roller of the chain is arranged on the gear tooth side wall of the chain, and the side wall provided with the concave position is used as the gear tooth side wall of the advancing direction of the chain when the gear tooth is meshed with the sleeve roller of the chain to pull the chain, the sleeve roller of the chain can be clamped in the concave position, the contact area is increased, the pressure intensity born by the side wall of the gear tooth is reduced, the problem of the inward sinking of the gear tooth side wall can be effectively overcome, the service life is prolonged, the mode of heightening the gear tooth adopted on the market is combined, the two defects of the traditional structure can be well solved, the maintenance and the use cost of a bicycle are reduced, the convenience is improved, and the gear tooth assembly adopting the gear tooth disc and the bicycle adopting the gear tooth assembly also have the advantages.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a partial schematic view of a first construction of a dental tray in accordance with the present invention;
FIG. 2 is a schematic view of the gear tooth structure in the dental tray of FIG. 1;
FIG. 3 is a schematic overall view of a second construction of the dental tray of the present invention;
FIG. 4 is a schematic illustration of the ring gear configuration of the configuration of FIG. 3;
FIG. 5 is a schematic view of the front face of the spoke in the configuration shown in FIG. 3;
fig. 6 is a schematic view of the rear face structure of the spoke in the structure shown in fig. 3.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
First embodiment
Referring to fig. 1 and 2, the present invention discloses a dental tray, which comprises a dental tray main body 100, wherein a plurality of gear teeth 101 are arranged on the peripheral side of the dental tray main body 100, a tooth slot 102 is formed between two adjacent gear teeth 101, and a concave position 103 adapted to a sleeve roller 200 of a chain is arranged on one side wall or two side walls of the gear teeth 101.
So through set up the concave position 103 of the bush roller 200 adaptation with the chain on the tooth 101 lateral wall of this chain tray, when the installation, the lateral wall that will be provided with concave position 103 is as the tooth 101 lateral wall of tooth tray advancing direction, thereby when the bush roller 200 of tooth 101 meshing chain pulls the chain, the bush roller 200 of chain can block in concave position 103, because the pressure P=F/S that the lateral wall of tooth 101 received (P is the pressure that the tooth 101 lateral wall received, F is the chain resistance, S is the contact area of tooth 'S socket 102 and chain drum), wherein S=L d (L is the contact arc length of chain bush roller 200 and tooth' S socket 102 lateral wall, d is the contact surface width), obviously, when the bush roller 200 adaptation of chain is in concave position 103, contact arc length L between the two has increased a lot than traditional structure, and then increased area of contact, and then reduced the pressure that the lateral wall received of tooth 101, can effectively overcome the problem emergence of 101 lateral wall subsidence, help prolonging service life, the mode that combines on the market adopts a high-grade mode, can be solved the practicality is good, the practicality is convenient, and the convenience is improved.
When the concave position 103 is arranged on one side wall of the gear teeth 101, the front direction and the back direction need to be distinguished when the dental tray is installed, so that the side wall where the concave position 103 is positioned is the side wall of the advancing direction of the gear teeth 101. When the concave positions 103 are arranged on the side walls of the two sides of the gear teeth 101, the matching of the sleeve roller 200 of the chain and the concave positions 103 can be realized without distinguishing the front and the back.
As a first preferred arrangement of the recess 103, the cross-sectional profile of the recess 103 is a rounded curve, the radius of curvature of which is adapted, e.g. identical, to the radius of the chain sleeve roller 200. So that the arc surface of the entire recess 103 can be fitted with the bush roller 200 of the chain.
As a second preferred arrangement of the recess 103, the cross-sectional profile of the recess 103 is a rounded curve having a plurality of arcuate segments with different radii of curvature, wherein the radius of curvature of at least one arcuate segment is adapted, e.g. identical, to the radius of the chain sleeve roller 200. This arrangement allows only a portion of the arcuate surface in the recess 103 to engage the chain sleeve roller 200. In order to prevent the arc segments forming the curve from affecting the sinking of the chain sleeve roller 200 into the concave portion 103, it is preferable that the centers of the radii of curvature of several of the arc segments are all located on the same side of the curve, so as to avoid the occurrence of convex hull structures in the concave portion 103. Or the curve is externally connected to the circumference of the arc section matched with the radius of the chain sleeve roller 200, so that the convex hull formed between two arc sections with different curvature radii is prevented from blocking the chain sleeve roller 200 into the concave position 103 to be attached to the corresponding arc section.
Further, in order to avoid a stagnant or choking feeling during the transmission process of the chain wheel and the chain, the proximal end and the distal end of the concave portion 103 are in smooth transition with the tooth slot 102, so that the sleeve roller 200 can slide along the side wall of the tooth 101 without abrupt change of position during the matching process of the tooth 101 and the chain sleeve roller 200.
In the actual production process, the concave depth of the concave position 103 may be flexibly set according to factors such as actual requirements and material properties of the gear teeth 101, which are not limited herein. To prevent the occurrence of tooth jump, the gear teeth 101 in the present embodiment may also be designed to be commercially available in a high-height manner, i.e., the height of the gear teeth 101 may be appropriately increased. Because the structural design is a common means in the industry, details such as specific heightened structure arrangement are not described herein.
Since the structure of the gear teeth 101 generally has the widest width of the root, the recess 103 is preferably provided at the root position of the gear teeth 101 to secure the strength of the gear teeth 101. As shown in the figure, the proximal end of the concave position 103 is tangent to the cross-sectional curve of the root of the tooth slot 102, so that the concave position 103 is arranged without increasing the depth of the tooth slot 102, and can be positioned at the lowest point of the side wall of the gear tooth 101, thereby ensuring the strength of the gear tooth 101.
And in some embodiments, the consideration of both ensuring the strength of the gear teeth 101 and reducing the pressure of the sleeve roller 200 on the gear teeth 101 is comprehensively taken as a base line, the connecting line of the proximal end and the distal end of the concave position 103 is taken as a base line, the distance between the circumference of the arc section matched with the radius of the sleeve roller 200 on the curve and the base line is taken as a representation of the depth D of the concave position 103, and the depth D of the concave position 103 meets the relation 0< D <2mm.
To sum up, the problem of the sidewall of the gear tooth 101 sinking can be solved by the arrangement of the concave position 103 in the tooth tray in this embodiment, and the gear jump preventing effect can be achieved by the way that the concave position 103 is clamped with the sleeve roller 200, and the gear jump problem can be effectively solved by combining with the heightening of the gear tooth 101, so that the practicality is strong.
However, abrasion of the gear teeth 101 is unavoidable, so that the gear disc with the above structure can effectively prolong the service life of the gear teeth 101, but still needs to be replaced after a certain period of work, and the conventional gear disc is difficult to disassemble, and a plurality of parts such as a crank and the like need to be disassembled, so that the replacement difficulty is high. In order to meet the market demand of pursuing light weight, the materials of the dental tray are changed from traditional steel parts to light materials such as aluminum alloy, so that the wear resistance of the gear teeth 101 is poor, and the effects are reduced when the dental tray is made of light materials such as aluminum alloy although the dental tray can effectively overcome two defects of the traditional structure and prolong the service life of the dental tray by combining the concave position 103.
In view of this, in some embodiments, as shown in fig. 3 to 6, the dental tray body 100 includes a spoke 400 and a ring gear 300 detachably mounted on the spoke 400, and the gear teeth 101 are disposed at a circumferential side of the ring gear 300.
In the use, if the teeth 101 of the tooth disc are worn and need to be replaced, only the ring gear 300 of the outer ring part needs to be disassembled for replacement, and the structures such as a crank and the like do not need to be disassembled like the traditional structure, so that the convenience and the efficiency of the disassembly and the replacement of the teeth 101 are improved. In addition, materials can be flexibly selected according to the needs in the process of producing the gear ring 300 and the spoke 400, so that various problems caused by material problems of the traditional dental tray are avoided, the weight of the dental tray can be reduced under the condition of ensuring the strength, the toughness and the rigidity of the spoke 400, the wear resistance of the dental tray is not required to be considered, and meanwhile, the wear resistance of the dental tray is mainly ensured on the premise of ensuring the strength and the toughness of the gear teeth 101, and the dental tray is realized to have high strength, high rigidity, high toughness, high wear resistance and light weight by combining the two materials. Ring gear 300 in this embodiment is preferably made of steel, such as alloy structural steel, so that it has excellent strength, wear resistance and toughness, and other materials having good wear resistance may be used. The spoke 400 is preferably made of aluminum alloy, so that the spoke has the advantages of sufficient strength, toughness and rigidity and light weight, and can be made of light materials such as carbon fiber and magnesium alloy.
The ring gear 300 can be directly mounted on the outer side of the spoke 400 through rivet riveting, screw connection, interference fit or the like, but in consideration of the fact that the gear teeth 101 can be subjected to great tangential force when the chain wheel drives the bicycle chain to drive, the mounting mode can cause great load to the rivet or screw or the like, in view of the fact, as a further improvement of the scheme, a plurality of spoke convex parts 404 are arranged on the outer side of the spoke 400 around the axis, a plurality of buckling concave parts 302 are arranged on the inner side of the ring gear 300 corresponding to the spoke convex parts 404, and the spoke convex parts 404 can be pressed into the buckling concave parts 302 along the axial direction.
In this way, when the gear ring 300 receives a tangential acting force, force transmission and dispersion can be realized through the cooperation of the spoke convex parts 404 and the buckling concave parts 302, so that the force transmission between the gear ring 300 and the spoke 400 is avoided through the action of rivets or screws, and the stability of work, the strength of connection and the reliability are improved. Meanwhile, the spoke convex parts 404 move along the axial direction to be assembled with the buckling concave parts 302, and are mainly subjected to tangential acting force in the working process of the dental tray, and almost no axial acting force exists, so that the assembling mode has strong working reliability and stability.
As shown in the drawing, in this embodiment, a plurality of convex forming concave portions 405 are concavely formed on the circumferential side of the spoke 400 along the axial direction, a spoke convex portion 404 is formed between two adjacent convex forming concave portions 405, and a ring gear convex portion 301 matching with the convex forming concave portions 405 is formed between two adjacent buckling concave portions 302. The depth of the convex forming concave portion 405 is matched with the thickness of the gear ring 300, so that the side wall of the buckling concave portion 302 is completely attached to the spoke convex portion 404, the contact area is ensured, and the bearing capacity is improved. To ensure the provision of convex-shaped concave portions 405, the thickness of spoke 400 needs to be larger than the thickness of ring gear 300, but since it is made of an aluminum alloy, there is little increase in weight, but at the same time, this increase in thickness contributes to the improvement in strength of spoke 400. In this structure, a limiting plate 406 abutting against the end face of the ring gear 300 or the end face of the ring gear convex portion 301 is formed between two adjacent spoke convex portions 404, and when the ring gear 300 is assembled, the limiting plate 406 can be used for mounting and positioning, and a rivet or screw mounting hole is conveniently arranged between the ring gear convex portion 301 and the limiting plate 406, so that connection and fixation of the two are realized.
As a further improvement of the scheme, one side or two sides of the spoke convex part 404 are provided with convex structures protruding relative to the root parts of the spoke convex part, and one side or two sides of the buckling concave position 302 are provided with concave structures matched with the convex structures. As shown in the figure, the protruding structure may be a sector structure in which the spoke convex portion 404 and the ring gear convex portion 301 are matched, or may be a block structure or a convex hull in which the protrusion is provided on the side surface of the spoke convex portion 404, and the engaging concave portion 302 may be provided with a concave structure matched with the protrusion.
In this way, spoke protrusions 404 may form a flared structure with a narrow root and a wide outer side through the convex structure, and after gear teeth 101 are subjected to tangential force, the force will be mainly borne by the convex structure and the concave structure, so that the rivet only bears a small part of force, and therefore the rivet mainly acts to axially fix ring gear 300 and spoke 400. And because of a plurality of convex-concave structures along the circumferential direction, the acting force of the chain is equally divided along the circumference, thereby greatly reducing the strength required by rivet connection and greatly improving the bearing capacity of the whole gear teeth 101. Meanwhile, when the chain acting force pulls the gear ring 300, the anti-pulling can be realized through the concave-convex structure, and the connection strength of the gear ring 300 and the spoke 400 is effectively improved.
As shown in the figure, as a further improvement of the present solution, the spoke 400 includes an inner spoke ring 402 and an outer spoke ring 401 which are coaxially distributed, and a plurality of spokes 403 which are disposed between the inner spoke ring 402 and the outer spoke ring 401 and are used for connecting the inner spoke ring 402 and the outer spoke ring 401, the convex forming concave portion 405 is disposed on one side surface of the outer spoke ring 401, and the other side surface of the outer spoke ring 401 is provided with a first weight-reducing groove. The inner spider 402 is provided with mounting structure for connecting a crank or a central shaft. In this way, since the inner and outer spokes 402, 401 are fixed by the spokes 403, the use of materials can be reduced while the weight can be reduced.
Preferably, the first weight-reducing groove in this embodiment includes an annular weight-reducing groove 409 located inside the convex portion forming concave portion 405 and a tooth-shaped weight-reducing groove 408 disposed offset from the convex portion forming concave portion 405. Meanwhile, in this embodiment, a second weight-reducing groove 410 is disposed on the same side of the spoke 403 as the first weight-reducing groove, and the spoke 403 is formed with ribs extending along the length direction thereof on two sides of the spoke 403 through the second weight-reducing groove 410. The tooth-like weight-reduction groove 408 communicates with the annular weight-reduction groove 409 and the second weight-reduction groove 410 also communicates with the annular weight-reduction groove 409, such that the edge of the aperture formed between two adjacent spokes 403 forms a rib connected to the web, which rib and web form a closed coaming structure 411 as shown. In this way, the weight of the spoke 400 can be effectively reduced by the first weight-reducing groove provided after reasonably avoiding the convex portion forming concave portion 405 and the second weight-reducing groove 410 provided on the spoke 403 on the same side, contributing to the realization of light weight. And although the provision of the first and second weight-reducing grooves 410 reduces the thickness of the spoke 400, it can increase the strength, toughness, and tangential strength by the coaming structure 411, so that the overall strength, toughness, etc. are not greatly affected. For dental tray parts, the structure realizes perfect combination of strength, rigidity, toughness, wear resistance and light weight.
In the actual production process, the inner spoke ring 402, the outer spoke ring 401 and the spokes 403 are integrally formed, and the first weight-reducing groove and the second weight-reducing groove 410 can be integrally formed with the inner spoke ring 402, the outer spoke ring 401 and the spokes 403 or formed by milling afterwards according to the actual processing difficulty.
As shown, the mounting structure includes an internal spline disposed in the center of the inner spider 402 and a plurality of mounting holes distributed about the axial direction and disposed on the inner spider 402. The mounting holes may include mounting holes for attachment to a crank, or may include mounting holes for mounting a disk. And the internal spline is used for matching with a middle shaft of the bicycle to realize installation.
In addition, the shapes and sizes of the inner spoke ring 402, the outer spoke ring 401 and the spokes 403 can be reasonably set according to the needs in the actual production process, and as shown in the figure, the spokes 403 in the embodiment are of a structure of bending along the axial direction of the spokes 400, so that the inner spoke ring 402 and the outer spoke ring 401 deviate along the axial direction. The tooth disc structure in the scheme is not only suitable for the tooth disc or flywheel of the bicycle, but also suitable for all chain transmission or gear transmission, and has wide application range.
And still further disclose a tooth dish subassembly and a bicycle in this embodiment, this tooth dish subassembly includes axis, left crank, right crank and the tooth dish of above-mentioned structure, left crank and right crank set up respectively in the both ends of axis, tooth dish sets up in epaxially. The bicycle comprises a frame, a guide system, a driving system and a braking system, wherein the guide system, the driving system and the braking system are arranged on the frame, and the driving system is provided with the dental disc assembly with the structure. The guide system mainly comprises a handlebar, a front fork, a front axle, a front wheel and other parts, and a rider can change the running direction and keep the balance of the vehicle body by operating the handlebar; the driving (transmission or walking) system mainly comprises a toothed disc assembly, a pedal chain, a flywheel, a rear shaft, a rear wheel and other parts, and the pedal force of the human foot is transmitted by the toothed disc assembly, the chain, the flywheel, the rear shaft and other parts by the pedal, so that the bicycle is continuously advanced; the brake system consists of brake parts, so that the rider can operate the brake at any time to slow down and stop the running bicycle and ensure the running safety. Since the main structure of the bicycle is disclosed in the prior art, the specific structure and connection relation of the guide system, the driving system and the brake system are not described herein. Obviously, the dental tray assembly and the bicycle also have the advantages of the dental tray.
Second embodiment
The difference of this embodiment is that only the first weight-reducing groove is provided, and no second weight-reducing groove 410 is provided, so as to be suitable for the case where the spoke 403 is smaller in size.
Third embodiment
The present embodiment mainly includes the first embodiment, and is different in that the second weight-reducing groove 410 in the present embodiment is disposed on the other side opposite to the first weight-reducing groove.
Fourth embodiment
The difference of this embodiment is that, as shown in fig. 4, an inclined surface 303 is provided at one end of the inner ring edge of the ring gear 300, which is formed by the ring gear convex portion 301 and the buckling concave portion 302, and is close to the bottom of the convex portion forming concave portion 405, so that when the ring gear 300 is axially mounted on the spoke 400, the ring gear 300 can be conveniently mounted by guiding through the inclined surface 303, and the assembly efficiency is improved. And no inclined surface 303 is arranged at the other end of the gear ring 300 opposite to the gear ring, so that seamless joint between the end surface and the spoke 400 is facilitated.
Fifth embodiment
The difference of the present embodiment is that the circumference of the limiting plate 406 is larger than the circumference of the outermost end of the spoke convex portion 404 in the present embodiment, so as to form a circle of extending wall 407 formed outside the spoke convex portion 404 as shown in the figure, increase the contact area between the limiting plate 406 and the ring gear 300, and improve the assembly strength and stability.
The above examples are only preferred embodiments of the invention, and other embodiments of the invention are possible. Equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the invention, and these equivalent modifications or substitutions are intended to be included within the scope of the present claims.
Claims (7)
1. The tooth plate comprises a tooth plate main body, wherein a plurality of gear teeth are arranged on the peripheral side of the tooth plate main body, tooth grooves are formed between two adjacent gear teeth, and the tooth plate is characterized in that concave positions matched with sleeve rollers of a chain are arranged on one side wall or two side walls of the gear teeth; the tooth disc main body comprises a spoke and a gear ring detachably arranged on the spoke, and the gear teeth are arranged on the periphery of the gear ring; the outer side of the spoke is provided with a plurality of spoke convex parts around the axle center, the inner side of the gear ring is provided with a plurality of buckling concave parts corresponding to the spoke convex parts, and the spoke convex parts can be pressed into the buckling concave parts along the axial direction; the periphery of the spoke is concavely provided with a plurality of convex part forming concave positions along the axial direction, a spoke convex part is formed between two adjacent convex part forming concave positions, and a gear ring convex part matched with the convex part forming concave positions is formed between two adjacent buckling concave positions; one side or two sides of the spoke convex part are provided with convex structures protruding relative to the root parts of the spoke convex part, and one side or two sides of the buckling concave position are provided with concave structures matched with the convex structures.
2. A dental tray as in claim 1, wherein the concave portion has a smooth cross-sectional profile with a radius of curvature that matches the radius of the chain's sleeve roller.
3. A dental tray as in claim 1, wherein the concave portion has a cross-sectional profile that is a rounded curve having arcuate segments with different radii of curvature, wherein the radius of curvature of at least one arcuate segment is adapted to the sleeve roller radius of the chain.
4. A dental tray as in claim 3, wherein the centers of the radii of curvature of the arcuate segments are all on the same side of the curve.
5. A dental tray as in any of claims 1-4, wherein the proximal and distal ends of the recess smoothly transition with the tooth space.
6. A dental tray assembly comprising a central shaft, a left crank, a right crank and a dental tray according to any one of claims 1-5, wherein the left crank and the right crank are respectively arranged at two ends of the central shaft, and the dental tray is arranged on the central shaft.
7. A bicycle comprising a frame and a guide system, a drive system and a brake system provided on the frame, wherein the drive system is provided with a dental tray assembly according to claim 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910299260.6A CN110077518B (en) | 2019-04-15 | 2019-04-15 | Dental tray, dental tray assembly and bicycle |
| PCT/CN2020/084473 WO2020211723A1 (en) | 2019-04-15 | 2020-04-13 | Chainwheel, chainwheel assembly, and bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910299260.6A CN110077518B (en) | 2019-04-15 | 2019-04-15 | Dental tray, dental tray assembly and bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110077518A CN110077518A (en) | 2019-08-02 |
| CN110077518B true CN110077518B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910299260.6A Active CN110077518B (en) | 2019-04-15 | 2019-04-15 | Dental tray, dental tray assembly and bicycle |
Country Status (2)
| Country | Link |
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| CN (1) | CN110077518B (en) |
| WO (1) | WO2020211723A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110077518B (en) * | 2019-04-15 | 2024-04-12 | 湖南速奥科技有限公司 | Dental tray, dental tray assembly and bicycle |
| DE102023115800B3 (en) | 2023-06-16 | 2024-06-27 | Miranda & Irmão Lda. | DRIVE SYSTEM WITH ONE DRIVE SHAFT AND ONE CHAINRING |
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| Publication number | Publication date |
|---|---|
| WO2020211723A1 (en) | 2020-10-22 |
| CN110077518A (en) | 2019-08-02 |
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