A new type of steel ball retainer assembly structure

Abstract

The utility model discloses a novel steel ball retainer assembly structure, including the multiple torque transmission part one and the circumferential buffer part of the multiple torque transmission part one and circumferential buffer part of being equipped with the retainer body circumference outer wall, torque transmission part one includes the multiple accommodating recess of being equipped with on the retainer body outer wall, and the accommodating recess of torque transmission part one is arranged along the axial direction of retainer body, and the rolling friction piece is equipped in accommodating recess all, and the torque transmission part two of circumferential buffer part including the torque transmission part two of being equipped with on the retainer body outer wall, and the structure of torque transmission part two is same with the structure of torque transmission part one, and the axial both ends of torque transmission part two are equipped with circumferential buffer body all, the circumferential buffer body is hollow cylinder structure, and the outer wall of circumferential buffer body is equipped with the opening of making it produce elastic deformation, the utility model has NVH performance is good, and the steel ball retainer axial sliding process of buffering is jammed, and sliding friction is small, and the service life of steel ball retainer is long, and steel ball retainer material utilization rate has advantages such as high.

Description

Technical Field

[0001] This utility model relates to the field of steering intermediate shaft technology, specifically a novel steel ball cage assembly structure. Background Technology

[0002] The function of the steering shaft is to transmit the steering torque applied by the driver to the steering gear. Existing steering shafts and steering gear connections typically use a ball-and-steel sliding pair structure, consisting of a splined shaft, splined tube, and ball-and-steel components. For ease of assembly on the production line, the ball-and-steel components are usually pre-assembled using a cage to form a ball-and-steel cage assembly. Patent publication number CN112065872A discloses a backlash-free steering drive shaft ball-and-steel cage, specifically featuring three rows of C-shaped openings around the circumference of the ball-and-steel cage. Each C-shaped opening consists of two eccentric cylinders and a cylindrical column, forming an elastically deformable arc surface. The cylinders are interference-fitted with the ball tracks of the drive shaft and drive shaft sleeve. During operation, the arc surface tightly fits the drive shaft sleeve, eliminating circumferential backlash. The protruding shape of the C-shaped openings is arc-shaped and interference-fitted with the ball tracks of the drive shaft and drive shaft sleeve. However, this design suffers from problems such as easy jamming during axial sliding of the ball-and-steel cage, limited grease storage capacity, high friction, and short service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a novel steel ball cage assembly structure, which can eliminate the vibration of the steel ball cage from the circumferential direction, improve NVH performance, buffer the jamming during the axial sliding process of the steel ball cage, store sufficient grease on the steel ball cage, and replenish grease in real time to the circumferential buffer area and the action area of ​​the rolling friction component, reduce sliding friction, and improve the service life of the steel ball cage assembly, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel steel ball cage assembly structure includes multiple torque transmission parts and circumferential buffer parts provided on the outer circumferential wall of the cage body. Each torque transmission part includes multiple receiving grooves on the outer wall of the cage body, arranged along the axial direction of the cage body. Rolling friction elements are provided within each receiving groove, and an external locking buckle is provided on the outer edge of each receiving groove on the cage body to prevent the rolling friction elements from disengaging. The circumferential buffer part includes a second torque transmission part on the outer wall of the cage body. The structure of the second torque transmission part is the same as that of the first torque transmission part. Circumferential buffer bodies are provided at both axial ends of the second torque transmission part, spaced apart from the second torque transmission part. The outer axial end of the circumferential buffer body is flush with the outer axial end of the cage body. The circumferential buffer body is a cylindrical structure, and an opening is provided on its outer wall to allow elastic deformation.

[0005] Furthermore, the torque transmission part one and the circumferential buffer part are both equally spaced along the circumferential direction of the cage body, and the torque transmission part one and the circumferential buffer part are staggered along the circumferential direction of the cage body; the axial length of the torque transmission part one is greater than the axial length of the torque transmission part two.

[0006] Furthermore, the circumferential buffer body has a C-shaped column structure, and the opening of the circumferential buffer body faces the outside of the cage body.

[0007] Furthermore, multiple oil storage ring grooves are formed on the outer circumferential wall of the cage body.

[0008] Furthermore, the number of oil storage ring grooves is adapted to the number of circumferential buffer parts, the positions of the oil storage ring grooves and the circumferential buffer parts correspond, and the oil storage ring grooves are located between the circumferential buffer bodies at both ends of the circumferential buffer parts. The oil storage ring grooves surround the outer periphery of the torque transmission part two. Oil storage grooves that communicate with the oil storage ring grooves are provided on the outer circumferential walls of the circumferential buffer bodies.

[0009] Furthermore, the outer circumferential wall of the retainer body is provided with a groove for connecting the oil storage ring groove and the corresponding receiving groove.

[0010] Furthermore, the rolling friction element is a steel ball.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The new steel ball cage assembly structure, when the steering intermediate shaft is working, can eliminate the vibration of the steel ball cage from the circumferential direction through the circumferential buffer, thus improving NVH performance; when assembling the steel ball cage and working on the steering intermediate shaft, the rolling friction element provided in the torque transmission part and the circumferential buffer part can buffer the jamming during the axial sliding process of the steel ball cage; the oil storage ring groove and oil storage groove provided on the cage body can store sufficient grease and replenish grease in real time to the circumferential buffer area and the action area of ​​the rolling friction element, reducing sliding friction, improving the service life of the steel ball cage assembly and the material utilization rate of the steel ball cage, etc. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This is an isometric drawing of the present invention; Figure 4 This is a schematic diagram of the oil storage ring groove structure of this utility model.

[0013] In the figure: 1. Cage body; 2. Torque transmission part one; 21. Receiving groove; 22. Rolling friction element; 23. External lock; 3. Circumferential buffer part; 31. Torque transmission part two; 32. Circumferential buffer body; 321. Opening; 322. Oil storage groove; 4. Oil storage ring groove; 41. Dividing groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0015] Please see Figure 1-3 This utility model provides a technical solution: a novel steel ball cage assembly structure, including multiple torque transmission parts 2 and circumferential buffer parts 3 provided on the outer circumferential wall of the cage body 1. The torque transmission parts 2 and circumferential buffer parts 3 are equally spaced along the circumferential direction of the cage body 1, and the torque transmission parts 2 and circumferential buffer parts 3 are staggered along the circumferential direction of the cage body 1; in this embodiment, there are two torque transmission parts 2 and two circumferential buffer parts 3. The torque transmission part 2 includes a plurality of receiving grooves 21 provided on the outer wall of the cage body 1, and the receiving grooves 21 of the torque transmission part 2 are arranged along the axial direction of the cage body 1. Each receiving groove 21 is provided with a rolling friction element 22. In this embodiment, the rolling friction element 22 is a steel ball structure, and the outer edge of the receiving groove 21 on the cage body 1 is provided with an outer locking buckle 23 to restrict the rolling friction element 22 from falling out. The circumferential buffer part 3 includes a torque transmission part 2 31 provided on the outer wall of the cage body 1. The structure of the torque transmission part 2 31 is the same as that of the torque transmission part 1 2. The axial length of the torque transmission part 1 2 is greater than the axial length of the torque transmission part 2 31. Both ends of the torque transmission part 2 31 are provided with circumferential buffer bodies 32, and the circumferential buffer bodies 32 are spaced apart from the torque transmission part 2 31. The outer axial end of the circumferential buffer body 32 is flush with the outer axial end of the cage body 1. The circumferential buffer body 32 is a columnar structure, and an opening 321 is provided on the outer wall of the circumferential buffer body 32 to allow it to undergo elastic deformation. In this embodiment, the circumferential buffer body 32 is a C-shaped columnar structure, and the opening 321 of the circumferential buffer body 32 faces the outer side of the cage body 1.

[0016] The outer circumferential wall of the retainer body 1 is provided with a plurality of oil storage ring grooves 4; in this embodiment, the number of oil storage ring grooves 4 is adapted to the number of circumferential buffer parts 3, the positions of the oil storage ring grooves 4 and the circumferential buffer parts 3 are corresponding, and the oil storage ring grooves 4 are located between the circumferential buffer bodies 32 at both ends of the circumferential buffer parts 3, and the oil storage ring grooves 4 surround the periphery of the torque transmission part 2 31; the outer circumferential wall of the circumferential buffer body 32 is provided with oil storage grooves 322 that communicate with the oil storage ring grooves 4; Please refer to the following: Figure 4 The outer circumference of the retainer body 1 is also provided with a sub-groove 41 for connecting the oil storage ring groove 4 and the corresponding receiving groove 21.

[0017] In use: The ball cage is assembled between the spline sleeve and the spline drive shaft, and the rolling friction element 22 on the cage body 1 is fitted into the arc-shaped raceway between the spline sleeve and the spline drive shaft. The elastically deformable circumferential buffer 32 is also fitted into the arc-shaped raceway between the spline sleeve and the spline drive shaft, so that the circumferential buffer 32 and the arc-shaped raceway in the spline sleeve are interference-fitted. When the steering intermediate shaft is working, the circumferential buffer 32 can eliminate the vibration of the ball cage from the circumferential direction, thereby improving NVH performance. When assembling the ball cage and when the steering intermediate shaft is working, the torque transmission part 2 and the circumferential buffer part 3 are used to... The rolling friction element 22 can buffer the jamming during the axial sliding of the steel ball cage; the oil storage ring groove 4 on the cage body 1 can store a sufficient amount of grease, which can form a self-closed circulation with the movement of the steel ball cage during operation, and replenish the grease to the circumferential buffer body 32 area in real time, reducing sliding friction, improving the service life of the steel ball cage assembly, and reducing the weight of the steel ball cage; the oil storage groove 322 can further replenish the grease to the working area of ​​the circumferential buffer body 32, and the dividing groove 41 can further replenish the grease to the working area of ​​the rolling friction element 22.

[0018] The novel steel ball cage assembly structure disclosed in this embodiment can eliminate vibrations from the circumferential direction of the steel ball cage and improve NVH performance when the steering intermediate shaft is working. When assembling the steel ball cage and when the steering intermediate shaft is working, the rolling friction element 22 provided by the torque transmission part 2 and the circumferential buffer part 3 can buffer the jamming during the axial sliding process of the steel ball cage. The oil storage ring groove 4 and the oil storage groove 322 provided on the cage body 1 can store sufficient grease and replenish grease to the area of ​​the circumferential buffer 32 and the working area of ​​the rolling friction element 22 in real time, reduce sliding friction, improve the service life of the steel ball cage assembly and the material utilization rate of the steel ball cage.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel steel ball cage assembly structure, comprising multiple torque transmission sections and circumferential buffer sections provided on the outer circumferential wall of the cage body, wherein the torque transmission section includes multiple receiving grooves formed on the outer wall of the cage body, and the receiving grooves of the torque transmission section are arranged along the axial direction of the cage body, each receiving groove is provided with a rolling friction element, and each receiving groove on the cage body is provided with an external locking buckle at the outer edge of the receiving groove to prevent the rolling friction element from disengaging; characterized in that: The circumferential buffer section includes a torque transmission section two provided on the outer wall of the cage body. The structure of the torque transmission section two is the same as that of the torque transmission section one. Both axial ends of the torque transmission section two are provided with circumferential buffer bodies, and the circumferential buffer bodies are spaced apart from the torque transmission section two. The outer axial end of the circumferential buffer body is flush with the outer axial end of the cage body. The circumferential buffer body is a columnar structure, and an opening is provided on the outer wall of the circumferential buffer body to allow it to undergo elastic deformation.

2. The novel steel ball retainer assembly structure according to claim 1, characterized in that: Both the torque transmission section one and the circumferential buffer section are equally spaced along the circumferential direction of the cage body, and the torque transmission section one and the circumferential buffer section are staggered along the circumferential direction of the cage body; the axial length of the torque transmission section one is greater than the axial length of the torque transmission section two.

3. The novel steel ball retainer assembly structure according to claim 1, characterized in that: The circumferential buffer body has a C-shaped column structure, and the opening of the circumferential buffer body faces the outside of the cage body.

4. The novel steel ball retainer assembly structure according to claim 1, characterized in that: Multiple oil storage ring grooves are formed on the outer circumferential wall of the cage body.

5. The novel steel ball retainer assembly structure according to claim 4, characterized in that: The number of oil storage ring grooves is adapted to the number of circumferential buffer parts. The positions of the oil storage ring grooves and circumferential buffer parts correspond to each other. The oil storage ring grooves are located between the circumferential buffer bodies at both ends of the circumferential buffer parts. The oil storage ring grooves surround the outer periphery of the torque transmission part two. Oil storage grooves that communicate with the oil storage ring grooves are opened on the outer circumferential walls of the circumferential buffer bodies.

6. The novel steel ball retainer assembly structure according to claim 5, characterized in that: The outer circumference of the cage body is also provided with a groove for connecting the oil storage ring groove and the corresponding receiving groove.

7. The novel steel ball retainer assembly structure according to claim 1, characterized in that: The rolling friction element is a steel ball.

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