CN211623991U - Ball cage type universal joint - Google Patents
Ball cage type universal joint Download PDFInfo
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- CN211623991U CN211623991U CN202020038168.2U CN202020038168U CN211623991U CN 211623991 U CN211623991 U CN 211623991U CN 202020038168 U CN202020038168 U CN 202020038168U CN 211623991 U CN211623991 U CN 211623991U
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- race
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- 230000007704 transition Effects 0.000 claims abstract description 8
- 230000000717 retained effect Effects 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 208000035874 Excoriation Diseases 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of the transmission, especially, relate to a ball cage universal joint, including steel ball, star cover, eccentric holder and bell shell, raceway in the bell shell includes raceway in smooth transition's the first and second, the sphere centre of sphere of raceway is for arranging wherein in the first the centre of sphere left side of steel ball is eccentric, the sphere centre of sphere of raceway is for arranging wherein in the second the centre of sphere right side of steel ball is eccentric, the outer raceway of star cover includes smooth transition's first outer raceway and second outer raceway, the sphere centre of sphere of first outer raceway is for arranging wherein in the centre of sphere left side of steel ball is eccentric, the sphere centre of sphere of the outer raceway of second is for arranging wherein the centre of sphere right side of steel ball is eccentric. Therefore, when the ball cage universal joint swings at a large angle, the steel ball containing surfaces between the inner raceway of the bell-shaped shell and the outer raceway of the star sleeve can change in a cross mode, so that the steel balls are stressed uniformly, the abrasion risk is reduced, and the service life of the ball cage universal joint is prolonged.
Description
Technical Field
The utility model belongs to the technical field of the transmission, especially, relate to a ball cage universal joint.
Background
In the existing six-channel rzeppa universal joint, the spherical center of the inner spherical surface of the bell-shaped shell, the spherical center of the inner and outer spherical surfaces of the retainer and the spherical center of the outer spherical surface of the inner race are overlapped to form a common point. The structure has the defects that when the universal joint swings to a limit angle in the driving process of a vehicle, the containing areas of the steel ball and the inner spherical surface of the bell-shaped shell and the outer spherical surface of the star-shaped sleeve are too small, the steel ball and the ball path are easily abraded excessively, and the service life of the universal joint is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the ball cage type universal joint aims at solving the problems that the existing six-channel ball cage type universal joint is easy to cause excessive abrasion of a steel ball and a ball channel due to the fact that the containing areas of the steel ball, the inner spherical surface of a bell-shaped shell and the inner and outer spherical surfaces of a star sleeve are too small, and the service life of the universal joint is shortened.
In order to solve the technical problem, an embodiment of the present invention provides a ball cage type universal joint, including a steel ball, an inner race, an eccentric holder and an outer race, wherein the eccentric holder is disposed in the outer race, the inner race is disposed in the eccentric holder, the steel ball is held in a circular hole on the eccentric holder, an outer spherical surface of the inner race is in contact fit with an inner spherical surface of the eccentric holder, an inner spherical surface of the outer race is in contact fit with an outer spherical surface of the eccentric holder, a plurality of inner races of the outer race are disposed on an inner wall of the outer race, a plurality of outer races of the inner race corresponding to the inner races of the outer race are disposed on an outer periphery of the inner race, and the inner races of the outer race and the corresponding inner races of the inner race are all in conjugate contact with the steel ball; the inner race of the bell-shaped shell comprises a first inner race and a second inner race which are in smooth transition, the spherical center of the first inner race is eccentric relative to the left side of the spherical center of the steel ball placed in the first inner race, the spherical center of the second inner race is eccentric relative to the right side of the spherical center of the steel ball placed in the second inner race, the outer race of the inner race comprises a first outer race and a second outer race which are in smooth transition, the spherical center of the first outer race is eccentric relative to the left side of the spherical center of the steel ball placed in the first outer race, and the spherical center of the second outer race is eccentric relative to the right side of the spherical center of the steel ball placed in the second outer race.
Optionally, the center of the inner spherical surface of the outer race and the center of the outer spherical surface of the inner race are respectively located at two sides of the center of the steel ball, and the eccentricity between the center of the inner spherical surface of the outer race and the center of the steel ball is equal to the eccentricity between the center of the outer spherical surface of the inner race and the center of the steel ball.
Optionally, the center of the circular hole of the eccentric holder is eccentric from the center of the eccentric holder.
Optionally, the steel ball is in interference fit with the circular hole of the eccentric holder.
Optionally, the rzeppa universal joint further comprises an input shaft, the inner race is provided with a spline hole, and the input shaft is provided with an external spline matched with the spline hole.
Optionally, the birfield joint further comprises an output shaft fixed to or integrally formed with a side of the outer race that faces away from the input shaft.
Optionally, the inner race of the bell-shaped shell and the outer race of the inner race of the outer race of the inner race of the outer.
Optionally, eight inner ball tracks of the bell-shaped shell and eight outer ball tracks of the inner race of the bell-shaped shell and eight outer race of the inner.
According to the utility model discloses ball cage universal joint, the raceway includes the first inner raceway and the second inner raceway of smooth transition in the bell-shaped shell, the sphere centre of sphere of the first inner raceway is for arranging wherein the centre of sphere left side (input shaft side) of steel ball is eccentric, the sphere centre of raceway is for arranging wherein in the second the centre of sphere right side (output shaft side) of steel ball is eccentric, the outer raceway of star cover includes the first outer raceway and the second outer raceway of smooth transition, the sphere centre of sphere of the first outer raceway is for arranging wherein the centre of sphere left side (input shaft side) of steel ball is eccentric, the sphere centre of sphere of the second outer raceway is for arranging wherein the centre of sphere right side (output shaft side) of steel ball is eccentric. Therefore, when the ball cage universal joint swings at a large angle, the eccentric distances of the first inner rolling way and the second inner rolling way of the bell-shaped shell are different, and the eccentric distances of the first outer rolling way and the second outer rolling way of the star sleeve are different, so that the steel ball containing surfaces between the inner rolling way of the bell-shaped shell and the outer rolling way of the star sleeve can be changed in a cross mode, the steel balls are stressed uniformly, the risk that the steel balls and the inner rolling way of the bell-shaped shell and the outer rolling way of the star sleeve are excessively abraded due to the fact that the containing surfaces of the steel balls are too small is reduced. This structure can be applicable to six channel rzeppa universal joints and eight channel rzeppa universal joints.
Drawings
Fig. 1 is a schematic diagram illustrating an internal structure of a birfield type universal joint according to an embodiment of the present invention;
fig. 2 is a schematic view of a bell-shaped shell of a rzeppa universal joint according to an embodiment of the present invention;
fig. 3 is a schematic view of a inner race of a rzeppa universal joint according to an embodiment of the present invention;
fig. 4 is a sectional view taken along a-a in fig. 3.
The reference numerals in the specification are as follows:
1. an input shaft; 2. a steel ball; 3. a star-shaped sleeve; 31. an outer race of the inner race; 311. a first outer raceway; 312. a second outer raceway; 32. a splined bore; 4. an eccentric retainer; 5. a bell housing; 51. a bell-shaped shell inner raceway; 511. a first inner raceway; 512. a second inner raceway; 6. and an output shaft.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 4, an embodiment of the present invention provides a ball-and-cage type universal joint, including an input shaft 1, a steel ball 2, an inner race 3, an eccentric holder 4, an outer race 5, and an output shaft 6, wherein the eccentric holder 4 is disposed in the outer race 5, the inner race 3 is disposed in the eccentric holder 4, and the steel ball 2 is held in a circular hole on the eccentric holder 4. The output shaft 6 is fixed or integrally formed on the side of the outer bell housing 5 facing away from the input shaft 1.
The outer spherical surface of the inner race 3 is in contact fit with the inner spherical surface of the eccentric retainer 4, the inner spherical surface of the outer race 5 is in contact fit with the outer spherical surface of the eccentric retainer 4, a plurality of inner race 51 of the inner race of the outer race are arranged on the inner wall of the outer race 5, a plurality of outer race 31 of the inner race corresponding to the inner race 51 of the outer race are arranged on the periphery of the inner race 3, and the inner race 51 of the outer race and the inner race 31 of the corresponding inner race are in conjugate contact with a steel ball 2; the bell-type shell inner race 51 includes a first inner race 511 and a second inner race 512 which are smoothly transitioned, the spherical center of the first inner race 511 is eccentric with respect to the left side (input shaft 1 side) of the spherical center of the steel ball 2 placed therein, the spherical center of the second inner race 512 is eccentric with respect to the right side (output shaft 6 side) of the spherical center of the steel ball 2 placed therein, the inner race 31 includes a first outer race 311 and a second outer race 312 which are smoothly transitioned, the spherical center of the first outer race 311 is eccentric with respect to the left side (input shaft 1 side) of the spherical center of the steel ball 2 placed therein, and the spherical center of the second outer race 312 is eccentric with respect to the right side (output shaft 6 side) of the spherical center of the steel ball 2 placed therein.
The center of the inner spherical surface of the outer spherical shell 5 and the center of the outer spherical surface of the inner star-shaped sleeve 3 are respectively positioned at two sides of the center of the steel ball 2, and the eccentric distance between the center of the inner spherical surface of the outer spherical shell 5 and the center of the steel ball 2 is equal to the eccentric distance between the center of the outer spherical surface of the inner star-shaped sleeve 3 and the center of the steel ball 2.
Since the eccentricity is present in both the bell inner raceway 4 and the inner race outer raceway 3, the circular bore of the eccentric cage 4 is also designed to be eccentric. Therefore, the center of the circular hole of the eccentric holder 4 is not concentric with the center of the eccentric holder 4, and there is an eccentricity.
The eccentric retainer 4 is used for clamping the steel ball 2, guiding the rotation angles of the input shaft 1 and the output shaft 6 and positioning. The steel ball 2 is in interference fit with the circular hole of the eccentric retainer 4. The interference magnitude of the steel ball 2 and the circular hole of the eccentric retainer 4 is very small, and in the moving process of the rzeppa universal joint, friction exists between the steel ball 2 and the inner raceway 51 of the bell-shaped shell, between the outer raceway 31 of the star sleeve and between the steel ball 2 and the circular hole of the eccentric retainer 4, and the interference between the steel ball 2 and the circular hole of the eccentric retainer 4 is changed into small clearance fit. The purpose of designing like this is, in order to make the rzeppa universal joint after long-time motion, steel ball 2 keeps little clearance fit with the circular port of eccentric holder 4 to guarantee that the motion of whole rzeppa universal joint can maintain steady state.
When the rzeppa universal joint of the above embodiment swings, the corresponding inner race 51 of the bell housing and the outer race 31 of the inner race of the outer race of the inner race of the outer race of the.
In one embodiment, as shown in fig. 3 and 4, the inner race 3 is provided with a splined hole 32, and the input shaft 1 is provided with an external spline that is fitted into the splined hole 32. In this way, the connection of the input shaft 1 to the inner race 3 is achieved.
In the embodiment of fig. 1 to 4, six inner races 51 of the bell and outer races 31 of the inner race and six outer races of the inner race and the outer races of the inner race are provided, and six steel balls 2 are provided. That is, the aforementioned rzeppa joint is a six-channel rzeppa joint.
According to the utility model discloses the rzeppa universal joint, when the rzeppa universal joint swings the wide angle, because raceway 51's the first interior raceway 511 and the second interior raceway 512 eccentricity are different in the bell shell, and the first outer raceway 311 and the second outer raceway 312 eccentricity of the outer raceway 31 of star cover are different, the steel ball containing face between raceway 51 and the outer raceway 31 of star cover can cross change in the bell shell, make the even atress of steel ball 2, reduce the risk that steel ball 2 leads to steel ball 2 and bell shell interior raceway 51 and the outer raceway 31 excessive wear of star cover because of containing face undersize, increase the life of rzeppa universal joint.
In other embodiments, the inner race of the bell shell and the outer race of the inner race of the outer race of. That is, the rzeppa universal joint is applied as an eight-channel rzeppa universal joint.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A ball cage type universal joint comprises a steel ball, a star-shaped sleeve, an eccentric retainer and an outer race, wherein the eccentric retainer is arranged in the outer race, the star-shaped sleeve is arranged in the eccentric retainer, the steel ball is retained in a circular hole on the eccentric retainer, an outer spherical surface of the star-shaped sleeve is in contact fit with an inner spherical surface of the eccentric retainer, the inner spherical surface of the outer race is in contact fit with the outer spherical surface of the eccentric retainer, a plurality of inner race of the outer race are arranged on the inner wall of the outer race, a plurality of outer race of the star-shaped sleeve with the number corresponding to that of the inner race of the outer race are arranged on the periphery of the star-shaped sleeve, and the inner race of the outer race and the inner race of the corresponding star-shaped sleeve are in conjugate contact with the steel ball; the inner race of the bell-shaped shell comprises a first inner race and a second inner race which are in smooth transition, the spherical center of the first inner race is eccentric relative to the left side of the spherical center of the steel ball placed in the first inner race, the spherical center of the second inner race is eccentric relative to the right side of the spherical center of the steel ball placed in the second inner race, the outer race of the inner race comprises a first outer race and a second outer race which are in smooth transition, the spherical center of the first outer race is eccentric relative to the left side of the spherical center of the steel ball placed in the first outer race, and the spherical center of the second outer race is eccentric relative to the right side of the spherical center of the steel ball placed in the second outer race.
2. The rzeppa universal joint according to claim 1, wherein the center of the inner spherical surface of the outer bell and the center of the outer spherical surface of the inner race are located on both sides of the center of the steel ball, respectively, and the eccentricity between the center of the inner spherical surface of the outer bell and the center of the steel ball is equal to the eccentricity between the center of the outer spherical surface of the inner race and the center of the steel ball.
3. The rzeppa joint according to claim 1, wherein the center of the circular hole of the eccentric holder is eccentric from the center of the eccentric holder.
4. The rzeppa joint according to claim 1, wherein the steel balls are an interference fit with the circular bore of the eccentric cage.
5. A birfield joint according to claim 1, further comprising an input shaft, the inner race being provided with a splined bore, the input shaft being provided with external splines which mate with the splined bore.
6. A Rzeppa joint according to claim 5, further comprising an output shaft fixed to or integrally formed on the side of the outer bell housing facing away from the input shaft.
7. A Rzeppa joint according to any one of claims 1 to 6, wherein there are six of said inner race of the bell and outer race of the inner race of the outer race of the inner race of the.
8. A Rzeppa joint according to any one of claims 1 to 6, wherein there are eight of said inner race of the bell and outer race of the inner race of the outer race of the inner race of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020038168.2U CN211623991U (en) | 2020-01-08 | 2020-01-08 | Ball cage type universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020038168.2U CN211623991U (en) | 2020-01-08 | 2020-01-08 | Ball cage type universal joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211623991U true CN211623991U (en) | 2020-10-02 |
Family
ID=72636451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020038168.2U Active CN211623991U (en) | 2020-01-08 | 2020-01-08 | Ball cage type universal joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211623991U (en) |
-
2020
- 2020-01-08 CN CN202020038168.2U patent/CN211623991U/en active Active
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