CN104565030B - Linear-transmission ball spline device - Google Patents
Linear-transmission ball spline device Download PDFInfo
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- CN104565030B CN104565030B CN201310497988.2A CN201310497988A CN104565030B CN 104565030 B CN104565030 B CN 104565030B CN 201310497988 A CN201310497988 A CN 201310497988A CN 104565030 B CN104565030 B CN 104565030B
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Abstract
The invention discloses a linear-transmission ball spline device. The linear-transmission ball spline device comprises a spline shaft and a moving body, wherein a plurality of rolling grooves are formed in the surface of the spline shaft; the moving body comprises a body, two reflowing components and a plurality of rolling components; the body is provided with a perforated hole for sleeving of the spline shaft; the perforated hole is provided with rolling slots corresponding to the rolling grooves; the rolling grooves and the rolling slots form a load path; a mounting hole is formed in each of the two ends of the perforated hole; the two reflowing components are accommodated inside the mounting holes respectively; each reflowing component is provided with reflowing passages with the number corresponding to that of the rolling slots; outlines of the reflowing passages are U-shaped; the two ends of each reflowing passage are jointed with the load path and reflowing holes respectively to form a circulating path; the rolling components are arranged inside the circulating path. By adopting the structure, the linear-transmission ball spline device can give full play to original functions, outside diameters of nut components can be extremely minimized, and the assembling workhour is saved; the linear-transmission ball spline device is cheap, and easy and convenient to manufacture, and the quality reliability can be retained.
Description
Technical field
The present invention be a kind of Linear transmission component, espespecially a kind of Linear transmission ball spline device.
Background technology
The present invention is to make splined shaft and nut component be combined into the transmission group of linear relative movement with regard to passing through most balls
Part, using the ball of the moment of torsion communication portion of straight line guide portion or industrial robot in work mechanism or various industrial machines etc.
Spline device.
It is known, there are Japanese Unexamined Patent Publication 61-179414 Patent Case or JP 58- known to this kind of ball spline device
No. 137616 Patent Cases, disclosed ball spline device.The ball spline device, be by：Possess to have along length direction and extend
Plural bar rolling channel splined shaft；And while being assembled in above-mentioned splined shaft through most balls, possess have above-mentioned ball without
The nut component of limit circulating path is constituted, as the Infinite Cyclic of ball can make above-mentioned nut component edge around the splined shaft
Its length direction to move freely.
Additionally, the ball Infinite Cyclic path that nut component possesses, be by：The rolling of the nut component arranged for ball
The load passage constituted by the rolling channel of ditch and splined shaft；The ball backward channel of formation parallel with the load passage；And with this
The U-shaped direction conversion road that link is formed in load passage and ball backward channel is constituted.Then, by load passage and
The two ends of ball backward channel configure above-mentioned direction conversion road to constitute ball Infinite Cyclic road.
Above-mentioned document ball spline device is interior to enclose face being formed face is enclosed in cylindric nut component and this is arranged in
Splined shaft between gap installing synthetic resin retainer, returned using the ball that cooperatively forms of the keeper and nut component
Go back to passage and direction conversion road.
Additionally, in order to allow rolling to be moved to ball backward channel via direction conversion in the ball of above-mentioned load passage, needing
The ball that the ball departs from splined shaft is allowed to roll groove.Therefore, known ball spline device is provided with above-mentioned keeper
The continuous portion in the ball in above-mentioned direction conversion road is drawn, makes the ball moved in above-mentioned ball rolling channel trough roller cross this and has drawn
Portion rolls groove from the ball and departs from, and is formed as being housed in the direction conversion road formed by keeper and nut component cooperation.
But, in the known ball spline device of described above, because being to cooperatively form ball by keeper and nut component
Backward channel, thus the ball backward channel at least must from splined shaft towards its radial direction vacate keeper amount of thickness away from
From.Additionally, above-mentioned direction conversion road or ball backward channel are formed with keeper, in order to realize that the complicated shape is to utilize mould
Tool is made with synthetic resin ejection formation.Therefore, the ball spline commonly used has problems with point：
If being located in nut component the keeper deformation in face of enclosing, then the keeper will contact splined shaft, cause to hinder
The motion of nut component, so keeper is difficult to form extremely slim.Therefore, protect with regard to housing between splined shaft and nut component
For the known ball spline device of holder, the external diameter of nut component can be affected by keeper thickness, so that in nut structure
Part outside dimension becomes big.
Known ball spline device, makes ball be able to Infinite Cyclic using above-mentioned keeper, but the keeper is penetrated for plastics
Go out molding to make, its length dimension is all fixed, therefore the nut of different length cannot be applied to, versatility is not high.
The content of the invention
The present invention is in view of the problems referred to above point and the invention that is, its object is to provide one kind can give full play to it is original
Function, and nut component external diameter can limit miniaturization, and assembling is not when taking a lot of work, can inexpensive and easy manufacture again can
Maintain the ball spline device of reliability.
To reach above-mentioned purpose, the solution of the present invention is：
A kind of Linear transmission ball spline device, comprising：
One splined shaft, which extends to strip structure towards a direction, and it is direction of principal axis to define the bearing of trend, the splined shaft
Surface is provided with the rolling channel that plural bar is axially extended；
One moving body, which includes body, two return pieces and plural rolling member, and the body is provided with one for wearing that splined shaft is arranged
Hole, the inner edge surface of the perforation are provided with the rolling groove of relative rolling channel, and rolling channel constitutes a load path, and the perforation with rolling groove
Be respectively arranged at two ends with an installing hole, installing hole with diameter greater than the perforation diameter and both be interconnected, body is further provided with
The return port that quantity is arranged with respect to rolling groove and parallel to rolling groove, the two ends of the return port are connected with the installing hole, this time
The section of discharge orifice is one circular；Two return pieces are respectively contained in two installing holes, and return piece is provided with backflow of the quantity with respect to rolling groove
Road, backflow road profile are a U-shaped, and its two ends is connected with load path and return port respectively and constitutes a circulating path；Plural number rolling
Moving part is arranged at circulating path.
By above-mentioned structure, the external diameter of the body can be reduced without keeper is arranged between splined shaft and body, and
The return piece system is arranged at the installing hole at the two ends of the body, when the body only has axial length change, then the backflow
Part still can be universally used in the body, therefore improve the versatility of the return piece.
Furthermore, to make the rolling member that preferably smooth degree is obtained when the circulating path runs, present invention system is for most holding
The backflow road that rolling member operation has some setbacks is easily caused, the design of specific path is carried out, which is described as follows：
Described backflow road divides into four sections, and this four sections are sequentially connected respectively for section of climbing, the first meander sections, the second revolution
Section and joining section；Diameter of the width in backflow road more than rolling member.
Described section part of climbing is located in rolling channel, and section of climbing has a climb altitude and length of climbing, climb altitude
Less than length of climbing, and length of climbing meets this relational expression：The Zhi Jing of 0.25 times of rolling member≤climb Chang Du≤0.5 times rolling member
Diameter.
The first described meander sections constitute single-revolution section with the second meander sections, and the radius of the Internal periphery of the meander sections meets this
Relational expression：The diameter of the Ban Jing≤rolling member of the Zhi Jing≤Internal periphery of 0.5 times of rolling member.
The first described meander sections see it by direction of principal axis with the second meander sections, the bottom of first meander sections and the second meander sections
Contouring is made up of the first arc section and the mutually tangent linking of the second arc section respectively, the circle of the first arc section and the second arc section
The heart is different；And the length of first arc section meets this relational expression：The length of first arc section of length ＜ of 0.5 times of second arc section
The length of second arc section of 0.8 times of ＜ of degree；And first arc section radius less than the second arc section radius.
The return piece is fixed on installing hole for stable by the present invention, and the inner edge surface depression of installing hole is provided with an annular
Fixing groove, when the return piece arranges installing hole, the end face of return piece and the tangent setting of inner side cell wall of fixing groove, a fixture set
The fixing groove is placed in, the fixture contacts at the end face of return piece.
Design by above-mentioned path, the design of required climb altitude especially when rolling member departs from the rolling channel, by which
Climb altitude is dispersed to the definition of the leading portion of climb section and first meander sections：From climbing, section is started at the first meander sections connecting points
To 1/2nd of the total length less than the first meander sections scope, rolling member is allowed to compare and set in the past in the climb altitude of section of climbing
Meter is low, also reduces relatively its resistance for climbing, and it is smooth rolling member is run when departing from rolling channel.
Description of the drawings
Fig. 1 is the system figure of Linear transmission ball spline device of the present invention；
Fig. 2 is the constitutional diagram of Linear transmission ball spline device of the present invention；
A-A sectional views of the Fig. 3 for Fig. 2；
Fig. 4 is the axonometric chart of the return piece of Linear transmission ball spline device of the present invention；
Fig. 5 is that the path in the backflow road of return piece of the present invention constitutes schematic diagram；
Fig. 6 is that the path in the backflow road of return piece of the present invention constitutes schematic diagram, sees it by direction of principal axis；
B-B sectional views of the Fig. 7 for Fig. 5, illustrates section detailing of climbing in backflow road.
【Symbol description】
1 splined shaft, 11 rolling channel
2 bodies 21 are bored a hole
211 rolling groove, 22 installing hole
23 fixing groove, 231 inner side cell wall
24 return port, 3 return piece
31 backflow 32 end faces of road
A climbs the first meander sections of section B
C the second meander sections D joining sections
The bottom profile of second meander sections of bottom profile C1 of the first meander sections of B1
Q points of tangency T rolling member rotary paths
The radius of second arc sections of radius R2 of the first arc sections of R1
The width in the Internal periphery radius U backflows road of R3 meander sections
H climb altitude C climb length
90 load path, 100 circulating path
4 rolling member of X direction of principal axis
The diameter of 5 fixture D1 perforation
Diameter B2, C2 centers of circle of D2 installing holes.
Specific embodiment
In order to technical scheme is explained further, the present invention is explained in detail below by specific embodiment
State.
Refer to Fig. 1 to Fig. 3 and show a preferred embodiment of the present invention, the present invention is filled for a kind of Linear transmission ball spline
Put, comprising：
One splined shaft 1, which extends to strip structure towards a direction, defines the bearing of trend for direction of principal axis X, the splined shaft
1 surface is provided with the plural bar rolling channel 11 that axially X is extended；
One moving body, which includes body 2, two return pieces 3 and plural rolling member 4, and the body 2 is provided with one for the splined shaft 1
The perforation 21 being arranged, the inner edge surface of the perforation 21 are provided with the rolling groove 211 of the relative rolling channel 11, the rolling channel 11 and rolling groove
211 constitute a load paths 90, and the perforation 21 is respectively arranged at two ends with an installing hole 22, and the diameter D2 of the installing hole 22 is more than
The diameter D1 of the perforation 21 and both be interconnected, the body 2 is further provided with quantity with respect to the rolling groove 211 and parallel to the rolling
The return port 24 that groove 211 is arranged, the two ends of the return port 24 are connected with the installing hole 22, and the section of the return port 24 is a circle
Shape, that is to say, that the 24 footpath direction of return port is closing kenel；Two return pieces 3 are respectively contained in two installing holes 22, this time
Stream part 3 is provided with backflow road 31 of the quantity with respect to the rolling groove 211, and 31 profile of backflow road is a U-shaped, and its two ends is born with this respectively
Lotus path 90 and return port 24 are connected and constitute a circulating path 100；The plural rolling member 4 is arranged at the circulating path 100.
The present embodiment is provided with the fixation of an annular in the inner edge surface depression of the installing hole 22 in order to fix the return piece 3
Groove 23, when the return piece 3 arranges the installing hole 22, the end face 32 of the return piece 3 and 231 phase of inner side cell wall of the fixing groove 23
Setting is cut, then is arranged at after the fixing groove 23 by a fixture 5, the fixture 5 contacts at the end face 32 of the return piece 3, with
The direction of principal axis X degree of freedom of the return piece 3 is limited, and the fixture 5 is a c-type button being made of metal in the present embodiment, whereby,
The return piece 3 is all enveloped by metal material in any direction, please be coordinated shown in Fig. 2 and Fig. 3, the footpath direction of the return piece 3 by
The installing hole 22 is coated, and direction of principal axis X one end of the return piece 3 coats the end face 32 by 5 part of fixture, its cladding scope
Be optimal more than 1/2nd of the end face 32, other end is arranged to the perforation 21, can so avoid ball spline device because
It is improper the factor such as to use, and cause rolling member 4 impact the backflow road 31 power it is excessive when, cause 3 crack damage of return piece
（Note：Because the return piece is most of all being manufactured by plastic ejection moulding）, now because having metal barrier i.e. around the return piece 3
Rolling member 4 can be avoided to drop out the backflow road 31, you can from avoiding the equipment of the ball spline device is installed, because rolling member 4 is complete
Depart from the body 2 and splined shaft 1 and make equipment lose the degree of freedom for limiting originally, and cause the associated components of equipment mutually to clash into
And damage, therefore the present invention is by the design of the special fixed structure of the return piece 3, therefore with actively preventing quick-fried pearl（Refer to and roll
Part）Safe effect avoiding bigger infringement from occurring.
Furthermore, refer to shown in Fig. 3 to Fig. 7, to make the rolling member 4 obtain preferably when the circulating path 100 runs
Smooth degree, therefore the backflow road 31 is divided into four sections by the present invention, this four sections are sequentially connected respectively for climb a section A, the first meander sections
B, the second meander sections C and joining section D, wherein, section A that climbs is connected with load path 90, and joining section D is held in the mouth with return port 24
Connect；Refer to shown in Fig. 7, section part A of climbing is located in the rolling channel 11, section A that climbs is with a climb altitude H and climbs
Length C, climb altitude H is less than length C of climbing, and length C of climbing meets this relational expression：The diameter of 0.25 times of rolling member
The diameter of≤length C≤0.5 times the rolling member that climbs；First meander sections B and the second meander sections C constitute single-revolution section, the revolution
The radius R3 of the Internal periphery of section meets this relational expression：Radius R3≤the rolling member of the Zhi Jing≤Internal periphery of 0.5 times of rolling member it is straight
Footpath, and the width U in the backflow road 31 is more than the diameter of the rolling member 4.
Fig. 6 is referred to, first meander sections B and the second meander sections C see it by direction of principal axis X, first meander sections B and second
The bottom profile of meander sections C is made up of the mutually tangent linkings of the first arc section B1 and the second arc section C1 respectively, and which has a phase
Point of contact Q, the first arc section B1 be different with the center of circle B2, C2 of the second arc section C1, and the length of first arc section B1 meet
This relational expression：The length of the second arc section C1 of 0.8 times of length ＜ of length ＜ the first arc section B1 of 0.5 times of second arc section C1
Degree（Note：Continue to climb during the leading portion of 4 to the first meander sections B of rolling member, therefore the length of first arc section B1 have to be larger than
The length of two arc section C1, could allow the leading portion of the first meander sections B amplitude of climbing more gentle, and allow 4 smooth operation of rolling member
To the second meander sections C, and obtain the rotary path T of the relatively rolling member 4 of smooth-going）, and the radius R1 of first arc section B1 it is little
In the radius R2 of second arc section C1；And the present invention is designed by above-mentioned path, especially depart from the rolling channel in rolling member 4
The design of required climb altitude when 11, its climb altitude is dispersed to the definition of the leading portion of climb section A and first meander sections B：
From climb section and the first meander sections connecting points start to the total length less than the first meander sections 1/2nd scope, allow rolling
Part 4 is compared in the climb altitude of section A that climbs, and is also reduced relatively its resistance for climbing, and is departed from rolling member 4
Can run during rolling channel 11 smooth.
The product form and style of above-described embodiment and schema the non-limiting present invention, any art it is common
Appropriate change or modification that technical staff is done to which, all should be regarded as the patent category without departing from the present invention.
Claims (4)
1. a kind of Linear transmission ball spline device, it is characterised in that include：
One splined shaft, which extends to strip structure towards a direction, defines the bearing of trend for direction of principal axis, the surface of the splined shaft
It is provided with the rolling channel that plural bar is axially extended；
One moving body, which includes body, two return pieces and plural rolling member, and the body is provided with a perforation being arranged for splined shaft,
The inner edge surface of the perforation is provided with the rolling groove of relative rolling channel, and rolling channel and rolling groove constitute a load path, and the perforation
Be respectively arranged at two ends with an installing hole, installing hole with diameter greater than the perforation diameter and both be interconnected, body is further provided with number
The relative rolling groove of amount and the return port arranged parallel to rolling groove, the two ends of the return port are connected with the installing hole, the backflow
The section in hole is one circular；Two return pieces are respectively contained in two installing holes, and return piece is provided with backflow road of the quantity with respect to rolling groove,
Backflow road profile is a U-shaped, and its two ends is connected with load path and return port respectively and constitutes a circulating path；Plural rolling member
It is arranged at circulating path；The backflow road divides into four sections, this four sections respectively sequentially linking for climb section, the first meander sections, second
Meander sections and joining section；Diameter of the width in the backflow road more than rolling member；The section part of climbing is located in rolling channel, and this climbs
Section has a climb altitude and length of climbing, and the climb altitude is less than length of climbing, and the length of climbing meets this relational expression：
The diameter of the Zhi Jing of 0.25 times of rolling member≤Chang Du≤0.5 times rolling member that climbs.
2. Linear transmission ball spline device as claimed in claim 1, it is characterised in that：First meander sections and the second meander sections
Single-revolution section is constituted, the radius of the Internal periphery of the meander sections meets this relational expression：The half of the Zhi Jing≤Internal periphery of 0.5 times of rolling member
The diameter of Jing≤rolling member.
3. Linear transmission ball spline device as claimed in claim 1, it is characterised in that：First meander sections and the second meander sections
It is seen by direction of principal axis, the bottom profile of first meander sections and the second meander sections is respectively by the first arc section and the second arc section phase
Mutually tangent linking is constituted, and the first arc section is different with the center of circle of the second arc section；And the length of first arc section meets this pass
It is formula：The length of the second arc section of 0.8 times of length ＜ of first arc section of length ＜ of 0.5 times of second arc section；And the
Radius of the radius of one arc section less than the second arc section.
4. Linear transmission ball spline device as claimed in claim 1, it is characterised in that：The inner edge surface depression of installing hole is arranged
There is the fixing groove of an annular, when the return piece arranges installing hole, the end face of return piece and the tangent setting of inner side cell wall of fixing groove,
One fixture is arranged at the fixing groove, and the fixture contacts at the end face of return piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310497988.2A CN104565030B (en) | 2013-10-22 | 2013-10-22 | Linear-transmission ball spline device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310497988.2A CN104565030B (en) | 2013-10-22 | 2013-10-22 | Linear-transmission ball spline device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104565030A CN104565030A (en) | 2015-04-29 |
| CN104565030B true CN104565030B (en) | 2017-05-10 |
Family
ID=53081857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310497988.2A Active CN104565030B (en) | 2013-10-22 | 2013-10-22 | Linear-transmission ball spline device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104565030B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236665B (en) * | 2021-03-19 | 2023-06-23 | 丽水市杰祥科技有限公司 | Sliding block with oil way distributor and use method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634296A (en) * | 1985-05-20 | 1987-01-06 | Nippon Thompson Co., Ltd. | Ball spline bearing |
| US4655611A (en) * | 1984-12-28 | 1987-04-07 | Nippon Thompson Co., Ltd. | Ball spline bearing assembly |
| JPS63140111A (en) * | 1986-12-03 | 1988-06-11 | Nippon Thompson Co Ltd | Ball spline bearing with drive device |
| US5669716A (en) * | 1995-03-14 | 1997-09-23 | Hiwin Technologies Corporation | Linear ball bearing |
| US5893646A (en) * | 1997-02-06 | 1999-04-13 | Nippon Thompson Co., Ltd. | Ball spline |
| EP1199485A1 (en) * | 2000-10-19 | 2002-04-24 | INA Wälzlager Schaeffler oHG | Linear rolling bearing |
| CN101317017A (en) * | 2005-11-01 | 2008-12-03 | Thk株式会社 | Movement guiding device |
| CN201884466U (en) * | 2010-11-26 | 2011-06-29 | 全球传动科技股份有限公司 | Ball spline group and spline shaft thereof |
| CN202811839U (en) * | 2012-02-22 | 2013-03-20 | 威海利奥泰儆自动化设备有限公司 | Flat surface raceway ball bearing spline pair |
-
2013
- 2013-10-22 CN CN201310497988.2A patent/CN104565030B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655611A (en) * | 1984-12-28 | 1987-04-07 | Nippon Thompson Co., Ltd. | Ball spline bearing assembly |
| US4634296A (en) * | 1985-05-20 | 1987-01-06 | Nippon Thompson Co., Ltd. | Ball spline bearing |
| JPS63140111A (en) * | 1986-12-03 | 1988-06-11 | Nippon Thompson Co Ltd | Ball spline bearing with drive device |
| US4764032A (en) * | 1986-12-03 | 1988-08-16 | Nippon Thompson Co., Ltd. | Ball spline bearing provided with a driving unit |
| US5669716A (en) * | 1995-03-14 | 1997-09-23 | Hiwin Technologies Corporation | Linear ball bearing |
| US5893646A (en) * | 1997-02-06 | 1999-04-13 | Nippon Thompson Co., Ltd. | Ball spline |
| EP1199485A1 (en) * | 2000-10-19 | 2002-04-24 | INA Wälzlager Schaeffler oHG | Linear rolling bearing |
| CN101317017A (en) * | 2005-11-01 | 2008-12-03 | Thk株式会社 | Movement guiding device |
| CN201884466U (en) * | 2010-11-26 | 2011-06-29 | 全球传动科技股份有限公司 | Ball spline group and spline shaft thereof |
| CN202811839U (en) * | 2012-02-22 | 2013-03-20 | 威海利奥泰儆自动化设备有限公司 | Flat surface raceway ball bearing spline pair |
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| Publication number | Publication date |
|---|---|
| CN104565030A (en) | 2015-04-29 |
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