CN115030962A

CN115030962A - Novel high-efficiency constant-speed movable joint three-pin joint

Info

Publication number: CN115030962A
Application number: CN202110244947.7A
Authority: CN
Inventors: 邹为良; 彭堂俊; 李晓天
Original assignee: Shanghai GKN Huayu Driveline Systems Co Ltd
Current assignee: Shanghai GKN Huayu Driveline Systems Co Ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2022-09-09

Abstract

The invention provides a novel high-efficiency constant-speed movable joint three-pin joint, which comprises three pin shafts with three shaft heads and roller bearings sleeved on each shaft head, wherein each roller bearing comprises a roller inner ring in running fit with the periphery of the shaft head, a roller outer ring in running fit with the periphery of the roller inner ring and a roller pin rotatably arranged between the roller inner ring and the roller outer ring, the inner peripheral surface of the roller outer ring is integrally provided with limiting steps distributed at two ends of the roller pin, a containing groove for containing the roller pin is formed between the two limiting steps, and the limiting steps are in contact fit with the end parts of the roller pin. The roller wheel structure has the advantages that the strength of the outer ring of the roller wheel can be prevented from being weakened due to the arrangement of the clamp spring groove, the originally widened area for ensuring the strength of the two sides of the clamp spring groove can be eliminated, the width of the outer ring of the roller wheel is reduced, and the cost is reduced; meanwhile, the roller bearing is ensured to run smoothly, and the efficiency is improved; and the roller bearing is easy to disassemble and assemble, so that the product detection and analysis after the experiment and the use are convenient, and the product continuity analysis and improvement are convenient.

Description

Novel high-efficiency constant-speed movable joint three-pin joint

Technical Field

The invention relates to the field of automobile transmission, in particular to a novel high-efficiency constant-speed movable joint three-pin joint.

Background

The tripod joint is a key part of the constant velocity universal joint, is an important part on an automobile transmission shaft, and can be divided into an AAR joint and a GI joint according to different structures. The AAR joint mainly comprises a three-pin shaft and three roller bearings, wherein the three-pin shaft is provided with three shaft heads, and each shaft head is sleeved with one roller bearing; each roller bearing comprises a roller inner ring matched with the shaft head, a roller outer ring matched with the periphery of the roller inner ring, a roller pin arranged between the roller inner ring and the roller outer ring, and clamp springs arranged at two ends of the roller pin, wherein the clamp springs are used for axially limiting the roller pin.

Further, among the current three round pin festivals, the mounting means of jump ring does: two clamp spring grooves are formed in the inner circumferential surface of the roller outer ring, clamp springs with oblique angle openings are pressed into each clamp spring groove after being extruded and deformed, and the clamp spring grooves control the clamp springs through interference fit of groove bottom diameters and the clamp springs to prevent the clamp springs from shaking. However, this structure has the following drawbacks:

1. the clamp spring groove has a large axial clearance with the clamp spring due to the requirement of an installation process, and the clamp spring cannot be kept vertical to the roller pin due to the structure of the clamp spring and the installation process; in addition, the width of the opening of the clamp spring and the height difference of the two sides can cause slight collision of the roller pins in the rolling process, so that the roller bearing is blocked in operation, the efficiency is reduced, and the service life is prolonged.

2. In order to reduce the influence of the clamp spring opening as much as possible, the precision of the clamp spring and the clamp spring groove and the installation process are required, and therefore the cost is increased.

3. The jump ring is non-detachable structure, and after gyro wheel bearing installed the jump ring, just must cut gyro wheel bearing with destructive mode if need carry out the analysis to inside, so be unfavorable for carrying out the continuity analysis to the product and improve, for example many internal data can't measure after the experiment.

4. The inner peripheral surface of the roller outer ring is provided with the clamp spring groove, and the clamp spring groove has the defects of stress concentration and the like after heat treatment because the chamfer at the bottom of the clamp spring groove is small, so that the material thickness of the clamp spring groove area needs to be ensured for ensuring the strength of the roller outer ring, the width of the roller outer ring is inevitably increased, and the cost is increased.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a novel high-efficiency constant velocity universal joint with three pins, which can avoid the roller bearing from being stuck in operation and improve the efficiency.

In order to achieve the purpose, the invention provides a novel high-efficiency three-pin joint of a constant-speed movable joint, which comprises three pin shafts with three shaft heads and roller bearings sleeved on each shaft head, wherein each roller bearing comprises a roller inner ring rotationally matched with the periphery of the shaft head, a roller outer ring rotationally matched with the periphery of the roller inner ring and a roller pin rotatably arranged between the roller inner ring and the roller outer ring, limiting steps distributed at two ends of the roller pin are integrally arranged on the inner circumferential surface of the roller outer ring, a containing groove for containing the roller pin is formed between the two limiting steps, and the limiting steps are in contact fit with the end parts of the roller pin.

Furthermore, the end surfaces of the two ends of the roller pins, which are in contact fit with the limiting steps, are arc surfaces.

Furthermore, the inner end of the roller inner ring close to the center of the three-pin shaft is integrally provided with a radial step, and the inner end face of the roller outer ring can be abutted against the radial step.

Furthermore, the outer end of the roller inner ring, which is far away from the center of the three-pin shaft, is integrally provided with an extension section which extends outwards in the axial direction.

Further, when the inner end face of the roller outer ring abuts against the radial step, the outer end face of the extension section is flush with the outer end face of the roller outer ring, or the outer end face of the extension section is higher than the outer end face of the roller outer ring.

As described above, the novel high-efficiency constant velocity mobile joint three pin joint according to the present invention has the following advantageous effects:

this application has cancelled the jump ring structure in jump ring groove and the gyro wheel bearing on the inner peripheral surface of gyro wheel outer lane, carries out the axial spacingly to the kingpin through two spacing steps on the inner peripheral surface of gyro wheel outer lane to can realize following beneficial effect: 1. the strength of the roller outer ring is prevented from being weakened due to the arrangement of the clamp spring groove, and the widened area of the original roller outer ring for ensuring the strength of the two sides of the clamp spring groove can be eliminated, so that the width of the roller outer ring is properly reduced, and the cost is reduced; 2. the mutual collision and friction between the clamp spring and the roller pin in the axial direction of the roller pin are avoided, the roller bearing is ensured to run smoothly, the efficiency of the roller bearing is improved, and the service life of the roller bearing is prolonged; 3. the roller bearing is easy to assemble and disassemble, so that the product after the test and use can be conveniently detected and analyzed, and the product can be conveniently subjected to continuous analysis and improvement; 4. the requirements of machining precision and installation process of all parts of the roller bearing are properly reduced, and the cost is further reduced.

Drawings

Fig. 1 is a schematic structural view of a novel high-efficiency constant-velocity movable joint three-pin joint in the application.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is an enlarged view of circle B of fig. 3.

Description of the element reference numerals

10 three pin shaft

11 shaft head

12 axle main body

20 roller bearing

21 roller inner ring

211 radial step

212 extended section

213 connecting hole

214 chamfer

22 roller outer ring

221 limiting step

222 containing groove

23 roller pin

231 arc surface

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be made without substantial technical changes and modifications.

As shown in fig. 1 to 3, the novel high-efficiency constant-speed movable joint triple pin joint provided by the present application includes a triple pin shaft 10 and three roller bearings 20, the triple pin shaft 10 includes a shaft main body 12 provided with an inner hole, and three shaft heads 11 integrally extending outwards along the radial direction of the shaft main body 12 from the outer peripheral surface of the shaft main body 12, the three shaft heads 11 are uniformly distributed along the circumferential direction of the shaft main body 12, the triple pin shaft 10 is an integrally formed part, each shaft head 11 is sleeved with one roller bearing 20, and the inner hole of the shaft main body 12 is used for being matched with an automobile transmission shaft. Further, the roller bearing 20 includes a roller inner race 21 rotatably fitted to the outer periphery of the spindle head 11, a roller outer race 22 rotatably fitted to the outer periphery of the roller inner race 21, and a needle roller 23 rotatably disposed between the roller inner race 21 and the roller outer race 22; in this embodiment, the spindle head 11 and the roller inner ring 21, the roller inner ring 21 and the roller pin 23, the roller pin 23 and the roller outer ring 22, and the roller outer ring 22 and the roller inner ring 21 are in clearance fit, preferably, in zero clearance fit. Specifically, as shown in fig. 4, the inner circumferential surface of the roller outer ring 22 is integrally provided with limiting steps 221 distributed at the two ends of the roller 23, a receiving groove 222 for receiving the roller 23 is formed between the two limiting steps 221, and the limiting steps 221 are in contact fit with the ends of the roller 23, so as to axially limit the roller 23 and control the axial displacement of the roller 23 in the axial direction thereof.

This application carries out the axial spacingly through two spacing steps 221 on the inner peripheral surface of gyro wheel outer lane 22 to kingpin 23, and for prior art, the jump ring structure among the gyro wheel bearing 20 and the jump ring groove structure on the inner peripheral surface of gyro wheel outer lane 22 have been cancelled to this application, so, this application can have following beneficial effect: 1. the strength of the roller outer ring 22 is prevented from being weakened due to the arrangement of the clamp spring groove on the roller outer ring 22, and the widened area for ensuring the strength of the two sides of the clamp spring groove in the original roller outer ring 22 can be eliminated, so that the width of the roller outer ring 22 is properly reduced, and the cost is reduced; 2. the mutual collision and friction between the clamp spring and the roller pin 23 in the axial direction of the roller pin 23 are avoided, the roller bearing 20 is ensured to run smoothly, the efficiency of the roller bearing 20 is improved, and the service life of the roller bearing 20 is prolonged; 3. the roller bearing 20 is easy to disassemble and assemble, so that the product after the experiment and use can be conveniently detected and analyzed, and the product can be conveniently subjected to continuous analysis and improvement; 4. the requirements of machining precision and installation process of each part of the roller bearing 20 are properly reduced, and the cost is further reduced.

Further, as shown in fig. 4, end surfaces of both ends of the needle roller 23 in contact fit with the limiting step 221 are arc surfaces 231, so that a contact area between the end surfaces of both ends of the needle roller 23 and the limiting step 221 is reduced, and the needle roller 23 is ensured to be freely rollably arranged between the roller inner ring 21 and the roller outer ring 22 around its axis on the premise that the limiting step 221 controls axial displacement of the needle roller 23.

Further, as shown in fig. 3 and 4, the inner end of the roller inner ring 21 near the center of the three-pin shaft 10 is integrally provided with a radial step 211. After the novel high-efficiency constant-speed moving joint three-pin joint is installed in a transmission system, a shell is sleeved outside the novel high-efficiency constant-speed moving joint three-pin joint and can also be called as a shaft fork, and the roller outer ring 22 is fixed by the shell; the roller 23 and the roller inner ring 21 can relatively move along the axial direction of the shaft head 11, and the roller 23 is limited in the containing groove 222 of the roller outer ring 22; therefore, when the roller inner ring 21 moves outwards along the axial direction of the spindle head 11 in the direction away from the center of the three-pin shaft 10, the radial step 211 on the roller inner ring 21 abuts against the inner end face of the roller outer ring 22, so that the moving distance of the roller inner ring 21 in the axial direction of the spindle head 11 is limited, that is, the allowable limit position of the roller inner ring 21 when moving outwards is limited, the roller inner ring 21 is ensured not to be separated, and the roller inner ring 21 is prevented from interfering with other components.

Further, as shown in fig. 4, an outer end of the roller inner ring 21 away from the center of the three-pin shaft 10 is integrally provided with an extended section 212 extending outward in the axial direction, and the extended section 212 increases the length of the roller inner ring 21 in the axial direction of the shaft head 11, so as to ensure that the roller 23 freely rolls in the circumferential direction of the outer diameter surface of the roller inner ring 21, and also ensure that the roller inner ring 21 freely moves in the axial direction of the shaft head 11. Preferably, the extension 212 of the roller inner ring 21 should satisfy: when the inner end surface of the roller outer ring 22 abuts against the radial step 211, the outer end surface of the extension section 212 is flush with the outer end surface of the roller outer ring 22, or the outer end surface of the extension section 212 is higher than the outer end surface of the roller outer ring 22, and that the outer end surface of the extension section 212 is higher than the outer end surface of the roller outer ring 22 means that the outer end surface of the extension section 212 extends outward beyond the outer end surface of the roller outer ring 22. Therefore, when the swing angle of the three-pin shaft 10 is increased from 0 degree, the center of the shaft head 11 of the three-pin shaft 10 moves downwards, when the swing angle reaches about a large-angle swing angle 23 degree, the center of the shaft head 11 is close to the position of the inner end face of the roller outer ring 22, in the process, the roller inner ring 21 can move downwards along with the shaft head 11, the outer end of the roller inner ring 21 is not separated from the roller inner ring 21 when the swing angle reaches about the large-angle swing angle 23 degree through the extension section 212 on the roller inner ring 21, and therefore the design of the large swing angle can be achieved more easily.

Further, as shown in fig. 3 and 4, a connection hole 213 matched with the shaft head 11 is formed in the roller inner ring 21, and chamfers 214 are arranged at both the inner end and the outer end of the connection hole 213; when the outer end of the roller inner ring 21 is provided with the extension section 212, the strength of the roller inner ring 21 is also improved, so that the chamfer 214 at the inner end of the roller inner ring 21 can be properly enlarged.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a novel three round pin festivals of high efficiency constant velocity movable festival, includes three round pin axle (10) that are equipped with three spindle nose (11) and establishes gyro wheel bearing (20) on every spindle nose (11) of cover, gyro wheel bearing (20) are including running fit at gyro wheel inner circle (21) of spindle nose (11) periphery, running fit at gyro wheel outer lane (22) of gyro wheel inner circle (21) periphery and rotationally dispose kingpin (23) between gyro wheel inner circle (21) and gyro wheel outer lane (22), its characterized in that: the inner circumferential surface of the roller outer ring (22) is integrally provided with limiting steps (221) distributed at two ends of the roller pin (23), a containing groove (222) for containing the roller pin (23) is formed between the two limiting steps (221), and the limiting steps (221) are in contact fit with the ends of the roller pin (23).

2. The new high efficiency constant velocity joint triple pin joint of claim 1 wherein: the end surfaces of the two ends of the roller pin (23) which are in contact fit with the limiting step (221) are arc surfaces (231).

3. The new high efficiency constant velocity joint triple pin joint of claim 1 wherein: the inner end of the roller inner ring (21) close to the center of the three-pin shaft (10) is integrally provided with a radial step (211), and the inner end face of the roller outer ring (22) can be abutted against the radial step (211).

4. The new high efficiency constant velocity joint triple pin joint of claim 3 wherein: the outer end of the roller inner ring (21) far away from the center of the three-pin shaft (10) is integrally provided with an extension section (212) extending outwards in the axial direction.

5. The new high efficiency constant velocity joint triple pin joint of claim 4 wherein: when the inner end face of the roller outer ring (22) is abutted against the radial step (211), the outer end face of the extension section (212) is flush with the outer end face of the roller outer ring (22), or the outer end face of the extension section (212) is higher than the outer end face of the roller outer ring (22).