CN117128251A - Ball cage universal joint for vehicle rear drive and vehicle - Google Patents
Ball cage universal joint for vehicle rear drive and vehicle Download PDFInfo
- Publication number
- CN117128251A CN117128251A CN202311404873.4A CN202311404873A CN117128251A CN 117128251 A CN117128251 A CN 117128251A CN 202311404873 A CN202311404873 A CN 202311404873A CN 117128251 A CN117128251 A CN 117128251A
- Authority
- CN
- China
- Prior art keywords
- ball
- groove
- ball cage
- channel groove
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009434 installation Methods 0.000 claims abstract description 49
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 208000016261 weight loss Diseases 0.000 claims description 11
- 239000013585 weight reducing agent Substances 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000007789 sealing Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000004323 axial length Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
The application discloses a ball cage universal joint for vehicle rear drive and a vehicle, wherein the ball cage universal joint comprises: the ball cage shell defines an installation space, and a first ball channel groove is formed in the inner side wall of the installation space; the radius of the circle where the bottom wall of the first ball channel groove is positioned is R, and the length dimension of the ball cage shell is L, wherein L is more than or equal to 0.3R and less than or equal to 0.6R; the inside wall in installation space is formed with the third lane groove, and the both sides in first lane groove all are formed with the third lane groove, and the third lane groove is suitable for spacing cooperation to the ball. Therefore, through enabling 0.3R to be less than or equal to L to be less than or equal to 0.6R, on the basis of enabling the ball cage universal joint to meet the required angle of the maximum working swing angle, the volume of the ball cage shell and the ball cage universal joint can be reduced, the weight of the ball cage universal joint can be reduced, the lightweight design of the ball cage universal joint is facilitated, in addition, the inner wall of the third ball channel groove can limit the ball to move out of the first ball channel groove, and the working reliability of the ball cage universal joint is improved.
Description
Technical Field
The application relates to the field of ball cage universal joints, in particular to a ball cage universal joint for vehicle rear drive and a vehicle.
Background
In the related art, the angle of the working swing angle of the existing ball cage universal joint is larger, the length of a ball channel groove of the ball cage universal joint is overlong, so that the ball cage universal joint is large in weight and size, the installation space of the ball cage universal joint is large, and the lightweight design of the ball cage universal joint is not facilitated. The required angle of the working swing angle of the upper ball-and-cage type universal joint on the rear drive is smaller than that of the upper ball-and-cage type universal joint on the front drive, the angle of the working swing angle of the ball-and-cage type universal joint is far beyond that required by the rear drive after the existing ball-and-cage type universal joint is installed on the rear drive of a vehicle, and the waste of materials and space is caused due to the fact that the length of a ball channel groove of the ball-and-cage type universal joint is too long. In addition, when the ball of the existing ball cage universal joint moves along the ball channel groove, the ball easily moves out of the ball channel groove from the end part of the ball channel groove, and the working reliability of the ball cage universal joint is affected.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present application is to provide a ball-and-socket joint, which is light in weight and small in size, and is beneficial to the lightweight design of the ball-and-socket joint, and the inner wall of the third ball-channel groove can limit the movement of the ball out of the first ball-channel groove, so that the operational reliability of the ball-and-socket joint is improved.
The application further provides a vehicle.
The ball and socket joint for vehicle rear drive according to the present application includes:
the ball cage shell is used for defining an installation space, the two opposite ends of the axial installation space of the ball cage shell are opened, and a first ball channel groove extending along the axial direction of the ball cage shell is formed in the inner side wall of the installation space;
the ball, the retainer and the star cover are all arranged in the installation space, the retainer is sleeved outside the star cover and is provided with a first installation hole, the outer peripheral wall of the star cover is provided with a second ball channel groove extending along the axial direction of the ball cage shell, the second ball channel groove is arranged corresponding to the first ball channel groove, the ball penetrates through the first installation hole, the ball is assembled in the first ball channel groove and the second ball channel groove, the star cover is provided with a second installation hole, and the second installation hole is suitable for assembling the connecting shaft;
the radius of the circle where the bottom wall of the first ball channel groove is located is R, the length dimension of the axial ball cage shell along the ball cage shell is L, and the relation is satisfied: l is more than or equal to 0.3 and less than or equal to 0.6R;
the inner side wall of the installation space is also provided with a third ball channel groove extending along the axial direction of the ball cage shell, the two sides of the first ball channel groove are respectively provided with a third ball channel groove along the axial direction of the ball cage shell, the third ball channel groove is adjacent to and communicated with the first ball channel groove, and the third ball channel groove is suitable for limiting and matching the ball to limit the ball to move out of the first ball channel groove.
According to the ball-and-socket joint, through enabling L to be more than or equal to 0.3R and less than or equal to 0.6R, on the basis of enabling the ball-and-socket joint to meet the required angle of the maximum working swing angle, compared with the prior art, the length size of the first ball channel groove is reduced, the volumes of the ball-and-socket shell and the ball-and-socket joint can be reduced, the assembly space of the ball-and-socket joint can be reduced, manufacturing materials of the ball-and-socket joint can be reduced, the weight of the ball-and-socket joint can be reduced, the lightweight design of the ball-and-socket joint is facilitated, and the manufacturing cost of the ball-and-socket joint can be reduced. Meanwhile, when the ball moves to the end part of the first ball channel groove along the first ball channel groove, the inner wall of the third ball channel groove can limit the ball to move out of the first ball channel groove, so that the working reliability of the ball cage universal joint is improved.
In some examples of the application, the bottom wall of the third lane groove and the bottom wall of the first lane groove are located on different circles.
In some examples of the application, the length dimension of the third ball channel slot is greater than or equal to 2mm along the axial direction of the cage housing.
In some examples of the application, the angle of maximum working swing of the ball and socket joint is 20 °.
In some examples of the application, the outer peripheral wall of the cage housing is formed with an annular weight-reducing groove that extends in the circumferential direction of the cage housing.
In some examples of the application, the ball and socket joint further comprises: and the end cover is provided with a first assembly hole, the ball cage shell is provided with a second assembly hole corresponding to the first assembly hole, and the end cover is used for closing one open end of the installation space.
In some examples of the application, the end cap is formed with a relief groove recessed away from the installation space, the relief groove being open at an end opposite the installation space and communicating with the installation space.
In some examples of the application, the end cap includes: the end cover main body is located at the end part of the ball cage shell to close one open end of the installation space along the axial direction of the ball cage shell, the first annular body is arranged around the peripheral wall of the ball cage shell, the first annular body is connected between the end cover main body and the first limit flanging, the first limit flanging stretches into the weight reduction groove, and the first limit flanging is in butt joint with the inner side wall of the weight reduction groove, which is close to the end cover, to limit.
In some examples of the application, the ball and socket joint further comprises: the connecting sleeve is annular and defines a mounting channel hole, the axial end cover and the connecting sleeve along the ball cage shell are respectively positioned at two ends of the ball cage shell, the connecting sleeve is sleeved on the outer side of the ball cage shell so that the mounting channel hole is communicated with the mounting space, and the connecting sleeve is used for mounting the protective cover.
In some examples of the application, the connection sleeve comprises: the connecting sleeve body, the second annular body and the second limit flanging, along the axial direction of the ball cage shell, the connecting sleeve body is opposite to the end part of the ball cage shell, the second annular body is arranged around the peripheral wall of the ball cage shell, the second annular body is connected between the connecting sleeve body and the second limit flanging, the second limit flanging stretches into the weight-reducing groove, and the second limit flanging is in butt joint with the inner side wall of the weight-reducing groove, which is close to the connecting sleeve, to be limited.
In some examples of the application, the end of the adapter sleeve body remote from the ball cage housing has a mounting flange bent inwardly toward the mounting passage hole.
In some examples of the application, the central axis of the mounting channel hole and the central axis of the second mounting hole are collinear.
In some examples of the application, the second fitting hole penetrates the ball cage housing in an axial direction of the ball cage housing, and the connecting sleeve has a third fitting hole corresponding to the second fitting hole, and a central axis of the first fitting hole, a central axis of the second fitting hole, and a central axis of the third fitting hole are collinear.
The vehicle comprises the ball-and-socket universal joint for vehicle rear drive.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
FIG. 1 is a schematic view of a ball and socket joint according to an embodiment of the present application;
FIG. 2 is another angular schematic view of a ball and socket joint according to an embodiment of the application;
FIG. 3 is a cross-sectional view of a ball and socket joint according to an embodiment of the application;
FIG. 4 is a side view of a ball and socket joint according to an embodiment of the application;
FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;
FIG. 6 is a cross-sectional view taken at B-B of FIG. 4;
FIG. 7 is a schematic view of an assembly of a ball cage housing, balls, a cage, and an inner race of a ball cage universal joint according to an embodiment of the present application;
FIG. 8 is a cross-sectional view taken at C-C of FIG. 7;
fig. 9 is a sectional view at D-D in fig. 7.
Reference numerals:
100 ball and cage universal joint;
10 ball cage housing; 11 installation space; 111 a first lane groove; 112 a third lane groove; 12 weight reduction grooves; 13 a second assembly hole; 14 a first open end; 15 a second open end;
20 balls;
30 holders; 31 a first mounting hole;
a 40 star cover; 41 a second lane groove; 42 second mounting holes;
50 end caps; 51 a first mounting hole; 52 avoiding the groove; 53 an end cap body; 54 a first annular body; 55 a first limit flanging;
60 connecting sleeves; 61 mounting a passage hole; 62 connecting sleeve main body; 63 a second annular body; 64 second limit flanging; 65 mounting a flanging; 66 third mounting hole.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
The following describes a ball and socket joint 100 for a rear drive of a vehicle according to an embodiment of the present application with reference to the accompanying drawings, and the ball and socket joint 100 may be mounted on a vehicle, which may be a vehicle. The ball and socket joint 100 may be connected to a connecting shaft to achieve torque transmission.
As shown in fig. 3, 4, 5, 6, 7, 8 and 9, the ball-and-socket joint 100 according to the embodiment of the present application includes: a cage housing 10, balls 20, a cage 30, and an inner race 40. The cage housing 10 defines a mounting space 11 which is opened along opposite ends of the axial mounting space 11 of the cage housing 10, and the inner side wall of the mounting space 11 is formed with a first ball channel groove 111 extending in the axial direction of the cage housing 10. The ball 20, the cage 30 and the star 40 are all disposed in the mounting space 11, the cage 30 is sleeved outside the star 40 and is formed with a first mounting hole 31, the outer circumferential wall of the star 40 is formed with a second ball channel groove 41 extending along the axial direction of the cage housing 10, the second ball channel groove 41 is disposed corresponding to the first ball channel groove 111, the ball 20 is threaded through the first mounting hole 31, and the ball 20 is assembled in the first ball channel groove 111 and the second ball channel groove 41, the star 40 has a second mounting hole 42, and the second mounting hole 42 is adapted to be assembled with a connecting shaft. Wherein, the radius of the circle where the bottom wall of the first ball channel groove 111 is located is R, and the length dimension of the axial ball cage housing 10 along the ball cage housing 10 is L, which satisfies the relation: l is more than or equal to 0.3 and less than or equal to 0.6R. The inner side wall of the installation space 11 is further formed with a third ball channel groove 112 extending along the axial direction of the ball cage housing 10, and third ball channel grooves 112 are formed on both sides of the first ball channel groove 111 along the axial direction of the ball cage housing 10, the third ball channel groove 112 is adjacent to and communicated with the first ball channel groove 111, and the third ball channel groove 112 is suitable for limiting the ball 20 to move out of the first ball channel groove 111.
Wherein the cage housing 10 defines a mounting space 11, an inner side wall of the mounting space 11 is a spherical surface, opposite ends of the mounting space 11 are opened in an axial direction of the cage housing 10, in other words, the mounting space 11 has opposite first and second open ends 14 and 15 in the axial direction of the cage housing 10. The inner side wall of the installation space 11 is formed with a first ball channel groove 111 extending in the axial direction of the cage housing 10. Taking the ball and socket joint 100 of fig. 3 as an example, the axial direction of the ball and socket housing 10 is the X direction of fig. 3. The number of the first ball channel grooves 111 may be plural, and the plural first ball channel grooves 111 are sequentially spaced apart from each other along the circumferential direction of the ball and cage universal joint 100, and further, the plural first ball channel grooves 111 are sequentially uniformly spaced apart from each other along the circumferential direction of the ball and cage universal joint 100, and the spacing distances between two adjacent first ball channel grooves 111 are the same along the circumferential direction of the ball and cage universal joint 100.
The ball 20, the cage 30 and the star 40 are all disposed in the mounting space 11, the cage 30 is annular, the inner side surface and the outer side surface of the cage 30 are spherical surfaces, the cage 30 is sleeved outside the star 40, the cage 30 is formed with the first mounting hole 31, the outer circumferential wall of the star 40 is spherical, the outer circumferential wall of the star 40 is formed with the second ball channel grooves 41 extending along the axial direction of the ball cage housing 10, the second ball channel grooves 41 are correspondingly arranged with the first ball channel grooves 111, the second ball channel grooves 41 can be a plurality of, the second ball channel grooves 41 are sequentially arranged at intervals along the circumferential direction of the star 40, the interval distance between two adjacent second ball channel grooves 41 is the same, the second ball channel grooves 41 are sequentially uniformly spaced along the circumferential direction of the star 40, and the second ball channel grooves 41 are arranged in one-to-one correspondence with the first ball channel grooves 111. The ball 20 is inserted through the first mounting hole 31, and the ball 20 is fitted in the first and second ball groove 111 and 41, and the ball 20 moves between the first and second ball groove 111 and 41 and transmits torque. Specifically, the first mounting holes 31 and the balls 20 may be plural, and the plural first mounting holes 31, the plural balls 20, the plural second ball channel grooves 41 and the plural first ball channel grooves 111 may be assembled in one-to-one correspondence. The plurality of beads 20 are respectively inserted into the plurality of first mounting holes 31, so that the relative positions of the plurality of beads 20 can be maintained. The inner race 40 has a second mounting hole 42, the second mounting hole 42 may be a circular hole, the second mounting hole 42 may penetrate the inner race 40, the second mounting hole 42 may be adapted to fit a connection shaft, and torque may be transmitted through the connection shaft to the ball and socket joint 100. For example: the inner peripheral wall of the second mounting hole 42 has an internal spline, the outer peripheral wall of the connecting shaft has an external spline, and when the connecting shaft is mounted in the second mounting hole 42, the internal spline of the second mounting hole 42 is fitted with the external spline of the connecting shaft, so that the connecting shaft is mounted in the second mounting hole 42.
The radius of the circle where the bottom wall of the first ball channel groove 111 is located is R, and the length dimension of the ball cage housing 10 along the axial direction of the ball cage housing 10 is L, satisfying the relation: 0.3 R.ltoreq.L.ltoreq.0.6R, for example: l is equal to 0.3R, 0.4R, 0.5R, 0.6R, etc. The relation is satisfied by "L" and "R": on the basis that L is more than or equal to 0.3R and less than or equal to 0.6R and the required angle of the maximum working swing angle is met by the ball cage universal joint 100, compared with the prior art, the length dimension of the first ball channel groove 111 is reduced, the axial dimension of the ball cage shell 10 is reduced, and the volumes of the ball cage shell 10 and the ball cage universal joint 100 can be reduced, so that the assembly space of the ball cage universal joint 100 is reduced, and the ball cage universal joint 100 is convenient to install on a rear drive of a vehicle. And, compared with the prior art, because the volume of the ball cage universal joint 100 is reduced, the manufacturing materials of the ball cage universal joint 100 can be reduced, the weight of the ball cage universal joint 100 can be reduced, the lightweight design of the ball cage universal joint 100 is facilitated, and the manufacturing cost of the ball cage universal joint 100 can be reduced.
The inner side wall of the installation space 11 is also formed with third ball channel grooves 112 extending in the axial direction of the ball cage housing 10, and third ball channel grooves 112 are formed on both sides of the first ball channel grooves 111 in the axial direction of the ball cage housing 10, the third ball channel grooves 112 are adjacent to and communicate with the first ball channel grooves 111, each first ball channel groove 111 is adjacent to and communicates with two third ball channel grooves 112, and the first ball channel grooves 111 are connected between the corresponding two third ball channel grooves 112. The third lane groove 112 is adapted to positively engage the ball 20 to limit movement of the ball 20 out of the first lane groove 111. Through setting up third lane groove 112, ball 20 moves along the axial of first lane groove 111 along ball cage shell 10, and ball 20 moves when the tip in first lane groove 111 and the inner wall butt in third lane groove 112, and the inner wall in third lane groove 112 can carry out spacingly to ball 20, and the inner wall in third lane groove 112 can restrict ball 20 and shift out first lane groove 111, promotes ball cage universal joint 100 operational reliability.
Further, the first and third ball groove 111 and 112 may be integrally formed.
Thus, by making 0.3 R.ltoreq.L.ltoreq.0.6R, on the basis of the angle required to make the ball-and-cage joint 100 satisfy the maximum working yaw angle, the length dimension of the first ball-and-cage housing 10 is reduced, and the axial dimension of the ball-and-cage housing 10 and the ball-and-cage joint 100 is reduced, compared with the prior art, so that the assembly space of the ball-and-cage joint 100 can be reduced, and the manufacturing materials of the ball-and-cage joint 100 can be reduced, the weight of the ball-and-cage joint 100 can be reduced, the lightweight design of the ball-and-cage joint 100 is facilitated, and the manufacturing cost of the ball-and-cage joint 100 can be reduced. Meanwhile, when the ball 20 moves to the end of the first ball channel groove 111 along the first ball channel groove 111, the inner wall of the third ball channel groove 112 can limit the ball 20 to move out of the first ball channel groove 111, thereby improving the operational reliability of the ball and cage joint 100.
In some embodiments of the present application, the bottom wall of the third lane groove 112 and the bottom wall of the first lane groove 111 are located on different circles. Wherein, the diapire of third lane groove 112 and the diapire of first lane groove 111 are the convex face, and the diapire of third lane groove 112 and the diapire of first lane groove 111 are located different circles, so set up can make the inner wall of third lane groove 112 play the spacing effect to ball 20, and when ball 20 moved to the tip in first lane groove 111 along first lane groove 111, can guarantee that ball 20 can not shift out the installation space 11 of ball cage shell 10 to can promote ball cage universal joint 100 operational reliability.
In some embodiments of the present application, the length dimension of the third ball channel slot 112 is greater than or equal to 2mm in the axial direction of the cage housing 10. The length of the third ball channel slot 112 may be 2mm, 2.5mm, 3mm, etc. along the axial direction of the ball cage housing 10, and the maximum length of the third ball channel slot 112 may be specifically set according to practical situations, for example: the length dimension of the third lane groove 112 is 2mm or more and 5mm or less. Through making the length dimension of third lane groove 112 more than or equal to 2mm, can make the axial dimension of third lane groove 112 along ball cage shell 10 long enough, guarantee that the inner wall of third lane groove 112 plays the spacing effect to ball 20, when ball 20 moves to the tip in first lane groove 111 along first lane groove 111, can further guarantee that ball 20 can not shift out the installation space 11 of ball cage shell 10 to can further promote ball cage universal joint 100 operational reliability.
In some embodiments of the present application, the angle of the maximum working swing angle of the ball-and-socket joint 100 is 20 °, and it is also understood that the working angle of the ball-and-socket joint 100 is 20 ° or less, in other words, the angle of the maximum working swing angle of the ball-and-socket joint 100 does not exceed 20 °. The arrangement can enable the ball-and-cage universal joint 100 to meet the rear driving requirement of the vehicle, and the ball-and-cage universal joint 100 is beneficial to reducing the rear driving weight and volume of the vehicle after being installed on the rear driving of the vehicle.
In some embodiments of the present application, as shown in fig. 1, 2 and 7, the outer circumferential wall of the gabion casing 10 is formed with an annular weight-reduction groove 12, and the weight-reduction groove 12 extends in the circumferential direction of the gabion casing 10. Wherein, the weight-reducing groove 12 is sunken towards the interior of the ball cage shell 10, and the weight-reducing groove 12 is of a closed-loop structure, and the weight of the ball cage shell 10 can be reduced by arranging the weight-reducing groove 12 on the peripheral wall of the ball cage shell 10, so that the weight of the ball cage universal joint 100 can be reduced, the lightweight design of the ball cage universal joint 100 is more facilitated, the manufacturing materials of the ball cage universal joint 100 can be further reduced, and the manufacturing cost of the ball cage universal joint 100 can be reduced.
In some embodiments of the present application, as shown in fig. 1 and 3, the ball and socket joint 100 may further include: the end cap 50, the end cap 50 has a first fitting hole 51, the ball cage housing 10 has a second fitting hole 13 corresponding to the first fitting hole 51, and the end cap 50 is used to close one open end of the installation space 11. Wherein, the second assembly hole 13 may be provided with internal threads, the first assembly hole 51 may also be provided with internal threads, the first assembly hole 51 penetrates through the end cover 50 along the thickness direction of the end cover 50, the first assembly hole 51 and the second assembly hole 13 may be plural, the plural second assembly holes 13 and the plural first assembly holes 51 are arranged in one-to-one correspondence, and the end cover 50 is used for closing the first open end 14 of the installation space 11. When the end cover 50 and the ball cage housing 10 are assembled, the end cover 50 is positioned on one side of the first open end 14 of the ball cage housing 10 along the axial direction of the ball cage housing 10, the first assembly hole 51 is opposite to the second assembly hole 13, and bolts are inserted through the first assembly hole 51 and are mounted in the second assembly hole 13, so that the end cover 50 is fixed on the ball cage housing 10, the end cover 50 and the ball cage housing 10 are fixedly assembled, and the end cover 50 is further sealed on the first open end 14 of the mounting space 11.
Further, a first sealing element can be arranged between the end cover 50 and the ball cage shell 10, and the first sealing element can be a sealing ring, so that the sealing performance between the end cover 50 and the ball cage shell 10 can be improved, and impurities can be effectively prevented from flowing into the installation space 11 from a gap between the end cover 50 and the ball cage shell 10.
In some embodiments of the present application, as shown in fig. 3, the end cap 50 may be formed with a relief groove 52 recessed toward away from the installation space 11, the end of the relief groove 52 opposite to the installation space 11 being open and communicating with the installation space 11. Wherein, along the axial direction of the ball cage housing 10, the end cover 50 is formed with a dodging groove 52 recessed toward the far away from the installation space 11, the end of the dodging groove 52 opposite to the installation space 11 is opened, and the dodging groove 52 is communicated with the installation space 11. By providing the avoidance groove 52, when the ball 20, the cage 30 and the inner race 40 oscillate in the installation space 11, the avoidance groove 52 can avoid the ball 20, the cage 30 and the inner race 40, prevent the ball 20, the cage 30 and the inner race 40 from collision interference with the end cover 50, enable the ball cage universal joint 100 to work normally, and reduce the working noise of the ball cage universal joint 100.
In some embodiments of the present application, as shown in fig. 1 and 3, the end cap 50 may include: the end cover main body 53, the first annular body 54 and the first limit flanging 55 are arranged along the axial direction of the ball cage shell 10, the end cover main body 53 is positioned at the end part of the ball cage shell 10 to close one open end of the installation space 11, the first annular body 54 is arranged around the peripheral wall of the ball cage shell 10, the first annular body 54 is connected between the end cover main body 53 and the first limit flanging 55, the first limit flanging 55 extends into the weight-reducing groove 12, and the first limit flanging 55 is in butt limit with the inner side wall of the weight-reducing groove 12, which is close to the end cover 50.
The end cover main body 53 is provided with the first assembly hole 51, the first annular body 54 and the first limit flange 55 are of annular structures, the end cover main body 53 is located at one side of the first open end 14 of the ball cage housing 10 along the axial direction of the ball cage housing 10, the end cover main body 53 seals the first open end 14 of the installation space 11, the first annular body 54 is arranged around the outer peripheral wall of the ball cage housing 10, it can be understood that the first annular body 54 is sleeved outside the ball cage housing 10, the first annular body 54 can be attached to the outer peripheral wall of the ball cage housing 10, the first annular body 54 is connected between the end cover main body 53 and the first limit flange 55, the first limit flange 55 extends into the weight-reducing groove 12, the first limit flange 55 is attached to the inner side wall of the weight-reducing groove 12, which is close to the end cover 50, the first limit flange 55 is in limit fit with the inner side wall of the weight-reducing groove 12, the end cover 50 can be limited to move along the axial direction of the ball cage housing 10, and the assembly firmness of the end cover 50 can be improved.
Further, the end cover main body 53, the first annular body 54 and the first limit flange 55 are integrally formed, so that the structural strength of the end cover 50 can be improved, the production die of the end cover 50 can be reduced, and the manufacturing cost of the end cover 50 can be reduced, thereby reducing the manufacturing cost of the ball-and-cage universal joint 100.
In some embodiments of the present application, as shown in fig. 2 and 3, the ball and socket joint 100 may further include: the connecting sleeve 60, the connecting sleeve 60 is annular, the connecting sleeve 60 defines a mounting channel hole 61, the end cover 50 and the connecting sleeve 60 are respectively positioned at two ends of the ball cage shell 10 along the axial direction of the ball cage shell 10, the connecting sleeve 60 is sleeved outside the ball cage shell 10 so that the mounting channel hole 61 is communicated with the mounting space 11, and the connecting sleeve 60 is used for mounting a protective cover.
Wherein, the connecting sleeve 60 is of a closed-loop structure, the connecting sleeve 60 defines a mounting channel hole 61, the end cover 50 is positioned at one side of the first open end 14 of the ball cage shell 10 along the axial direction of the ball cage shell 10, the connecting sleeve 60 is positioned at one side of the second open end 15 of the ball cage shell 10, the connecting sleeve 60 is sleeved outside the ball cage shell 10, the connecting sleeve 60 can be attached to the peripheral wall of the ball cage shell 10, the second open end 15 of the ball cage shell 10 is communicated with the mounting channel hole 61 and the mounting space 11, and the connecting shaft penetrates through the mounting channel hole 61 and is mounted in the second mounting hole 42. The shield may be mounted to the connection sleeve 60, for example: the protection casing is clamped in the connecting sleeve 60 through the clamping piece, or the protection casing is arranged in the connecting sleeve 60 through the bolts, or the protection casing is clamped in the connecting sleeve 60, through the arrangement of the connecting sleeve 60, the protection casing can be installed in the connecting sleeve 60, and can shield external matters of the ball cage universal joint 100, so that the external matters of the ball cage universal joint 100 are effectively prevented from flowing into the installation space 11 from the second open end 15 of the ball cage shell 10, and the interior of the installation space 11 is kept clean.
In some embodiments of the present application, as shown in fig. 2 and 3, the connection sleeve 60 includes: the connecting sleeve main body 62, the second annular body 63 and the second limit flanging 64 are arranged along the axial direction of the ball cage shell 10, the connecting sleeve main body 62 is opposite to the end part of the ball cage shell 10, the second annular body 63 is arranged around the peripheral wall of the ball cage shell 10, the second annular body 63 is connected between the connecting sleeve main body 62 and the second limit flanging 64, the second limit flanging 64 stretches into the weight-reducing groove 12, and the second limit flanging 64 is in butt limit with the inner side wall of the weight-reducing groove 12, which is close to the connecting sleeve 60.
The connecting sleeve main body 62, the second annular body 63 and the second limit flanging 64 are all in annular structures, the second annular body 63 is connected between the connecting sleeve main body 62 and the second limit flanging 64, the connecting sleeve main body 62 is opposite to the end part of the ball cage shell 10 along the axial direction of the ball cage shell 10, the second annular body 63 is sleeved on the outer peripheral wall of the ball cage shell 10, and the second annular body 63 can be attached to the outer peripheral wall of the ball cage shell 10. The second limit flanging 64 stretches into the weight-reducing groove 12, along the axial direction of the ball cage shell 10, the second limit flanging 64 is attached to the inner side wall of the weight-reducing groove 12, which is close to the connecting sleeve 60, and the second limit flanging 64 is in limit fit with the inner side wall of the weight-reducing groove 12, which is close to the connecting sleeve 60, so that the connecting sleeve 60 can be limited to move along the axial direction of the ball cage shell 10 in a direction away from the ball cage shell 10, and the assembling firmness of the connecting sleeve 60 and the ball cage shell 10 can be improved.
Further, the connecting sleeve main body 62, the second annular body 63 and the second limit flange 64 are integrally formed, so that the structural strength of the connecting sleeve 60 can be improved, the production die of the connecting sleeve 60 can be reduced, and the manufacturing cost of the connecting sleeve 60 can be reduced, thereby further reducing the manufacturing cost of the ball cage universal joint 100.
In some embodiments of the application, as shown in fig. 3, the end of the adapter sleeve body 62 remote from the cage housing 10 has a mounting flange 65 bent inwardly toward the mounting channel hole 61. Along the axial direction of the ball cage housing 10, the end portion of the connecting sleeve main body 62 away from the ball cage housing 10 is provided with a mounting flange 65 bent towards the inside of the mounting channel hole 61, the mounting flange 65 is of an annular structure, and the mounting flange 65 can be used for mounting a protective cover, so that the protective cover is more reliably mounted on the connecting sleeve 60.
In some embodiments of the present application, the central axis of the mounting channel hole 61 and the central axis of the second mounting hole 42 are collinear, so that the mounting channel hole 61 and the mounting space 11 are arranged opposite to each other, and the connecting shaft can be prevented from striking the connecting sleeve main body 62 when the connecting shaft swings to the maximum working swing angle, thereby reducing the working noise of the ball and cage universal joint 100.
In some embodiments of the present application, as shown in fig. 2 and 3, the second fitting hole 13 penetrates the cage housing 10 in the axial direction of the cage housing 10, the connection sleeve 60 has a third fitting hole 66 corresponding to the second fitting hole 13, and the central axis of the first fitting hole 51, the central axis of the second fitting hole 13, and the central axis of the third fitting hole 66 are collinear.
Wherein, the third assembly hole 66 may be provided with an internal thread, the second assembly hole 13 is a through hole, the second assembly hole 13 penetrates the ball cage housing 10 along the axial direction of the ball cage housing 10, the connecting sleeve 60 is provided with the third assembly hole 66 corresponding to the second assembly hole 13, the third assembly hole 66 penetrates the connecting sleeve 60 along the thickness direction of the connecting sleeve 60, the third assembly hole 66 is provided in the connecting sleeve main body 62, the third assembly hole 66 may be a plurality of, the plurality of third assembly holes 66 and the plurality of second assembly holes 13 are arranged in one-to-one correspondence, so that the same bolt penetrates the first assembly hole 51, the second assembly hole 13 and the third assembly hole 66 at the same time, thereby fixing the end cover 50, the ball cage housing 10 and the connecting sleeve 60, and further simplifying the structure of the ball cage universal joint 100. The central axes of the first assembly hole 51, the second assembly hole 13 and the third assembly hole 66 are collinear, so that the same bolt can pass through the first assembly hole 51, the second assembly hole 13 and the third assembly hole 66 at the same time, and the end cover 50, the ball cage housing 10 and the connecting sleeve 60 can be assembled fixedly.
Further, a second sealing element can be arranged between the connecting sleeve 60 and the ball cage shell 10, and the second sealing element can be a sealing ring, so that the sealing performance between the connecting sleeve 60 and the ball cage shell 10 can be improved, and impurities can be effectively prevented from flowing into the installation space 11 from a gap between the connecting sleeve 60 and the ball cage shell 10.
It should be noted that, on the premise that the maximum working angle of the ball-and-socket joint 100 of the present application is not more than 20 °, the lengths of the ball tracks of the ball-and-socket housing 10 and the star-shaped sleeve 40 may be reduced, and the axial length of the ball-and-socket housing 10 may be correspondingly reduced, so that the volume and weight of the ball-and-socket joint 100 may be reduced.
The ball cage 10 is limited in length to limit the length of the ball channel, and the ball 20 still contacts in the first ball channel 111 and the third ball channel 112 when the maximum swing angle is met. As shown in fig. 8, along the axial direction of the ball and socket joint 100, the axial length dimension of the third ball channel groove 112 is L1, and the axial length dimension of the first ball channel groove 111 is L2, satisfying the relation: l2+2l1 is less than or equal to L, l2=2×r×tan (β/2), R is the radius of the movement track of the ball 20, and β is the maximum working swing angle of the ball and socket joint 100.
According to the vehicle of the embodiment of the application, the vehicle can be a new energy vehicle, the vehicle comprises the ball-and-cage universal joint 100 of the embodiment, and the ball-and-cage universal joint 100 can be mounted on a rear drive of the vehicle. By making 0.3 R.ltoreq.L.ltoreq.0.6R, on the basis of the angle required to make the ball-and-cage joint 100 satisfy the maximum working swing angle, the volume of the ball-and-cage joint 100 can be reduced, and the weight of the ball-and-cage joint 100 can also be reduced, which is favorable to the lightweight design of the ball-and-cage joint 100, and thus is favorable to the lightweight design of vehicles.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (14)
1. A ball and socket joint for a rear drive of a vehicle, comprising:
the ball cage comprises a ball cage shell, a ball cage and a ball cage cover, wherein the ball cage shell defines a mounting space, opposite ends of the mounting space are opened along the axial direction of the ball cage shell, and a first ball channel groove extending along the axial direction of the ball cage shell is formed in the inner side wall of the mounting space;
the ball, the retainer and the star cover are all arranged in the installation space, the retainer is sleeved outside the star cover and is provided with a first installation hole, the outer circumferential wall of the star cover is provided with a second ball channel groove extending along the axial direction of the ball cage shell, the second ball channel groove is arranged corresponding to the first ball channel groove, the ball penetrates through the first installation hole, the ball is assembled in the first ball channel groove and the second ball channel groove, and the star cover is provided with a second installation hole which is suitable for assembling a connecting shaft;
the radius of the circle where the bottom wall of the first ball channel groove is located is R, the length dimension of the ball cage shell along the axial direction of the ball cage shell is L, and the relation is satisfied: l is more than or equal to 0.3 and less than or equal to 0.6R;
the inner side wall of the installation space is further provided with a third ball channel groove extending along the axial direction of the ball cage shell, the third ball channel grooves are formed on two sides of the first ball channel groove along the axial direction of the ball cage shell, the third ball channel groove is adjacent to and communicated with the first ball channel groove, and the third ball channel groove is suitable for limiting the ball beads to be matched so as to limit the ball beads to move out of the first ball channel groove.
2. The vehicle rear drive ball and socket joint according to claim 1, wherein the bottom wall of said third ball channel groove and the bottom wall of said first ball channel groove are located on different circles.
3. The ball and socket joint for vehicle rear drive according to claim 1, wherein the length dimension of said third ball channel groove is 2mm or more in the axial direction of said ball and socket housing.
4. The vehicle rear-drive ball and socket joint according to claim 1, wherein the angle of maximum operational swing of the ball and socket joint is 20 °.
5. The ball and socket joint for vehicle rear drive according to any one of claims 1 to 4, wherein an annular weight-reduction groove is formed in an outer peripheral wall of the ball and socket housing, the weight-reduction groove extending in a circumferential direction of the ball and socket housing.
6. The ball and socket joint for vehicle rear drive of claim 5, further comprising: and the end cover is provided with a first assembly hole, the ball cage shell is provided with a second assembly hole corresponding to the first assembly hole, and the end cover is used for closing one open end of the installation space.
7. The ball and socket joint for vehicle rear drive according to claim 6, wherein said end cover is formed with a relief groove recessed toward a direction away from said installation space, said relief groove being open at an end opposite to said installation space and communicating with said installation space.
8. The ball and socket joint for vehicle rear drive of claim 6, wherein said end cap comprises: the end cover main body is located at the end part of the ball cage shell so as to seal one open end of the installation space, the first annular body surrounds the outer peripheral wall of the ball cage shell, the first annular body is connected between the end cover main body and the first limit flanging, the first limit flanging stretches into the weight reduction groove, and the first limit flanging is in butt joint limit with the inner side wall of the weight reduction groove, which is close to the end cover.
9. The ball and socket joint for vehicle rear drive of claim 6, further comprising: the connecting sleeve is annular and is provided with a mounting channel hole, the end cover and the connecting sleeve are respectively positioned at two ends of the ball cage shell along the axial direction of the ball cage shell, the connecting sleeve is sleeved on the outer side of the ball cage shell so that the mounting channel hole is communicated with the mounting space, and the connecting sleeve is used for mounting a protective cover.
10. The ball and socket joint for vehicle rear drive according to claim 9, wherein said connection sleeve comprises: the connecting sleeve body, the second annular body and the second limit flanging, along the axial direction of the ball cage shell, the connecting sleeve body is opposite to the end part of the ball cage shell, the second annular body surrounds the peripheral wall of the ball cage shell, the second annular body is connected between the connecting sleeve body and the second limit flanging, the second limit flanging stretches into the weight reduction groove, and the second limit flanging is in butt joint limit with the inner side wall of the weight reduction groove, which is close to the connecting sleeve.
11. The vehicle rear drive ball and socket joint according to claim 10, wherein an end of said connection sleeve body remote from said ball and socket housing has a mounting flange bent inwardly toward said mounting passage hole.
12. The vehicle rear drive ball and socket joint according to claim 9, wherein the center axis of said mounting passage hole and the center axis of said second mounting hole are collinear.
13. The ball and socket joint for vehicle rear drive according to claim 6, wherein said second fitting hole penetrates said ball and socket housing in an axial direction of said ball and socket housing, said connecting sleeve has a third fitting hole corresponding to said second fitting hole, and a center axis of said first fitting hole, a center axis of said second fitting hole and a center axis of said third fitting hole are collinear.
14. A vehicle comprising a ball and socket joint for vehicle rear drive according to any one of claims 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404873.4A CN117128251B (en) | 2023-10-27 | 2023-10-27 | Ball cage universal joint for vehicle rear drive and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404873.4A CN117128251B (en) | 2023-10-27 | 2023-10-27 | Ball cage universal joint for vehicle rear drive and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117128251A true CN117128251A (en) | 2023-11-28 |
| CN117128251B CN117128251B (en) | 2024-01-30 |
Family
ID=88860433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311404873.4A Active CN117128251B (en) | 2023-10-27 | 2023-10-27 | Ball cage universal joint for vehicle rear drive and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117128251B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6368223B1 (en) * | 1997-07-16 | 2002-04-09 | Nsk Ltd. | Rolling bearing unit and constant velocity joint for wheels |
| CN101493120A (en) * | 2004-01-15 | 2009-07-29 | 本田技研工业株式会社 | Constant velocity joint |
| JP2010185541A (en) * | 2009-02-13 | 2010-08-26 | Jtekt Corp | Ball type constant velocity joint |
| KR20110125034A (en) * | 2010-05-12 | 2011-11-18 | 현대위아 주식회사 | Ball type constant velocity joint for vehicle |
| CN202082307U (en) * | 2011-06-15 | 2011-12-21 | 人本集团有限公司 | Fixed type constant velocity universal joint |
| CN105840679A (en) * | 2016-05-03 | 2016-08-10 | 芜湖佳先传动轴有限公司 | Lightweight axially slidable cage constant velocity universal joint with crossed lanes |
| CN109404430A (en) * | 2018-11-06 | 2019-03-01 | 浙江向隆机械有限公司 | A kind of fixed universal joint |
| CN110345170A (en) * | 2018-04-04 | 2019-10-18 | 株式会社捷太格特 | CV joint |
| CN112211915A (en) * | 2020-09-28 | 2021-01-12 | 万向钱潮股份有限公司 | Efficient rzeppa constant velocity universal joint |
| CN112784371A (en) * | 2020-12-31 | 2021-05-11 | 华南理工大学 | Method for predicting deflection bending moment of rzeppa constant velocity universal joint based on response surface |
| CN113623335A (en) * | 2021-08-23 | 2021-11-09 | 万向钱潮股份有限公司 | High-efficiency long-life fixed end ball cage type constant velocity universal joint |
| CN115234581A (en) * | 2022-09-23 | 2022-10-25 | 万向钱潮股份公司 | Constant speed driving shaft device |
-
2023
- 2023-10-27 CN CN202311404873.4A patent/CN117128251B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6368223B1 (en) * | 1997-07-16 | 2002-04-09 | Nsk Ltd. | Rolling bearing unit and constant velocity joint for wheels |
| CN101493120A (en) * | 2004-01-15 | 2009-07-29 | 本田技研工业株式会社 | Constant velocity joint |
| JP2010185541A (en) * | 2009-02-13 | 2010-08-26 | Jtekt Corp | Ball type constant velocity joint |
| KR20110125034A (en) * | 2010-05-12 | 2011-11-18 | 현대위아 주식회사 | Ball type constant velocity joint for vehicle |
| CN202082307U (en) * | 2011-06-15 | 2011-12-21 | 人本集团有限公司 | Fixed type constant velocity universal joint |
| CN105840679A (en) * | 2016-05-03 | 2016-08-10 | 芜湖佳先传动轴有限公司 | Lightweight axially slidable cage constant velocity universal joint with crossed lanes |
| CN110345170A (en) * | 2018-04-04 | 2019-10-18 | 株式会社捷太格特 | CV joint |
| CN109404430A (en) * | 2018-11-06 | 2019-03-01 | 浙江向隆机械有限公司 | A kind of fixed universal joint |
| CN112211915A (en) * | 2020-09-28 | 2021-01-12 | 万向钱潮股份有限公司 | Efficient rzeppa constant velocity universal joint |
| CN112784371A (en) * | 2020-12-31 | 2021-05-11 | 华南理工大学 | Method for predicting deflection bending moment of rzeppa constant velocity universal joint based on response surface |
| CN113623335A (en) * | 2021-08-23 | 2021-11-09 | 万向钱潮股份有限公司 | High-efficiency long-life fixed end ball cage type constant velocity universal joint |
| CN115234581A (en) * | 2022-09-23 | 2022-10-25 | 万向钱潮股份公司 | Constant speed driving shaft device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117128251B (en) | 2024-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101078460B1 (en) | Opposed Path Joint | |
| ITMI992627A1 (en) | HOMOCINETIC JOINT | |
| US10352368B2 (en) | Propeller shaft and constant-velocity joint used in said propeller shaft | |
| WO2007074630A1 (en) | Constant velocity universal joint and inner member of the same | |
| KR101994661B1 (en) | A cage for constant velocity joint and the contant velocity joint comprising the cage and an inner race intergrated with a sleeve | |
| CN117128251B (en) | Ball cage universal joint for vehicle rear drive and vehicle | |
| CN110821978A (en) | Eight steel ball rzeppa constant velocity joints of wide-angle high efficiency | |
| CN101278137B (en) | Constant velocity ball joint | |
| CN211398335U (en) | Eight steel ball rzeppa constant velocity joints of wide-angle high efficiency | |
| CN201884612U (en) | Cylindrical gear driving device | |
| US8062139B2 (en) | Fixed constant-velocity universal joint | |
| ITMI970189A1 (en) | DRIVE SHAFT WITH INTERMEDIATE SUPPORT | |
| CN216424542U (en) | Steering transmission shaft dustproof device with spherical structure | |
| CN214998934U (en) | Driving shaft mechanism, driving shaft assembly and automobile | |
| CN215861402U (en) | Steering universal joint with dustproof sealing structure | |
| CN115143199B (en) | Universal joint exhaust structure and universal joint | |
| CN215567441U (en) | Steering universal joint with nylon gasket dustproof sealing structure | |
| CN219388620U (en) | Steering intermediate shaft dust cover assembly | |
| CN211449400U (en) | Sealing bush for mounting automobile shafts | |
| CN220668189U (en) | Cross axle universal joint installed in small space | |
| CN218480052U (en) | Novel integrated lightweight hub bearing unit | |
| CN218844902U (en) | Blocking cover type ball cage and transmission shaft applying same | |
| CN220452540U (en) | Driving shaft ball cage, half shaft assembly and vehicle | |
| CN212838972U (en) | Guide bush for automobile longitudinal transmission shaft | |
| CN201086801Y (en) | Closed cooling anti-dust cover brake disc assembly used for servant brake of electric car and bicycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |