CN210978263U

CN210978263U - Tripod universal joint

Info

Publication number: CN210978263U
Application number: CN201921714728.5U
Authority: CN
Inventors: 徐霖; 陈强; 张家彬; 王敷玟; 战敏; 冯立
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-07-10
Anticipated expiration: 2029-10-12

Abstract

The utility model relates to a universal joint technical field especially relates to a tripod universal joint. The tripod universal joint comprises a tripod shell, a tripod joint and a ball ring; the three pin joints are assembled in the three pin shells and comprise three pin shafts which are uniformly arranged; the ball ring is sleeved on the pin shaft and forms a first raceway with the pin shaft; the tripod type universal joint further comprises aligning rollers which are arranged in the first roller path side by side, and the aligning rollers are abutted against the pin shaft and the spherical ring; and a second raceway for the ball ring to slide is arranged in the three-pin shell, and the ball ring is abutted against the three-pin shell. The tripod universal joint transmits torque by mutual extrusion among the pin shaft, the aligning roller, the ball ring and the tripod shell of the tripod joint, can effectively reduce the sliding friction between the ball ring and the tripod shell, reduce the derived axial force, improve the transmission efficiency and reduce the vibration noise.

Description

Tripod universal joint

Technical Field

The utility model relates to a universal joint technical field especially relates to a tripod universal joint.

Background

Constant velocity joint mechanisms are key components of automotive drive axle shafts. The universal joint allows the included angle between the connected parts to be changed in a certain range, and variable-angle power transmission is realized. The universal joint meets the requirements of axial displacement and angle change caused by vertical jumping during the running of an automobile and simultaneously transmits torque.

The tripod universal joint that uses on the car at present has following problem, and when tripod and tripod shell become big angle, the unable compensation angle deviation of ball ring, to the inclination of raceway in the tripod shell, lead to ball ring and the raceway production great sliding friction in the tripod shell, and then form great derivation axial force, reduce transmission efficiency, cause whole car acceleration in-process to appear continuous horizontal swing phenomenon about, influence the vehicle travelling comfort.

SUMMERY OF THE UTILITY MODEL

To current tripod universal joint form the problem of great derivation axial force when tripod and tripod shell become the wide-angle, the utility model provides a tripod universal joint of low derivation axial force.

The utility model provides a tripod universal joint, which comprises a tripod shell, a tripod joint and a ball ring; the three pin joints are assembled in the three pin shells and comprise three pin shafts which are uniformly arranged; the ball ring is sleeved on the pin shaft and forms a first raceway with the pin shaft; the tripod type universal joint further comprises aligning rollers which are arranged in the first roller path side by side, and the aligning rollers are abutted against the pin shaft and the spherical ring; and a second raceway for the ball ring to slide is arranged in the three-pin shell, and the ball ring is abutted against the three-pin shell.

Preferably, the inner wall of the tripod shell corresponding to the second raceway is arc-shaped; the outer wall of the ball ring is arc-shaped, and the radian of the outer wall of the ball ring is matched with the radian of the inner wall of the tripod shell, so that the ball ring is in surface contact with the tripod shell.

Preferably, the inner wall of the ball ring is arc-shaped, and the radian of the inner wall of the ball ring is matched with the radian of the aligning roller, so that the aligning roller is in surface contact with the ball ring.

Preferably, the self-aligning roller is a symmetrical spherical roller.

Preferably, the symmetrical spherical rollers are spindle rollers.

Preferably, two rows of the aligning rollers are arranged on the first raceway side by side.

Preferably, the tripod joint further comprises a retainer arranged on the tripod joint and located in the first raceway, and two aligning rollers are sleeved on the retainer.

Preferably, the tripod type universal joint further comprises an annular retainer ring arranged at the tail end of the pin shaft and located at a position corresponding to the first raceway.

Preferably, the tripod type universal joint further comprises an input shaft and an output shaft, the input shaft is spline-coupled with the tripod joint, and the output shaft is assembled on the tripod shell.

Preferably, a first external spline is arranged on the input shaft, a first internal spline is arranged on the three pin joints, and spline coupling is performed based on the first external spline and the first internal spline; and a second external spline is arranged on the output shaft.

The utility model discloses an among the tripod universal joint, round pin axle and the ball ring butt of aligning roller and tripod festival that set up in first raceway, and ball ring and tripod shell butt, make the round pin axle of tripod festival, aligning roller, extrude each other with the transmission moment of torsion between ball ring and the tripod shell, at tripod shell and ball ring cooperation in order to realize universal joint axial direction motion and angle beat, when making form certain motion angle between tripod shell and the tripod festival, and this motion angle can be compensated to the change angle between ball ring and the tripod, with the sliding friction between reduction ball ring and the tripod shell, reduce derived axial force, improve transmission efficiency and reduce the purpose of vibration noise.

Drawings

Fig. 1 shows a perspective view of a tripod joint according to an embodiment of the present invention;

fig. 2 shows a front view of a tripod joint according to an embodiment of the present invention;

fig. 3 shows a cross-sectional view of a tripod joint in an embodiment of the present invention.

Wherein, 1, three pin shells; 2. three pin joints; 21. a pin shaft; 22. a first internal spline; 3. a ball ring; 4. a self-aligning roller; 5. a holder; 6. an annular retainer ring; 7. an input shaft; 71. a first external spline; 8. an output shaft; 81. a second male spline.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1-3 illustrate a tripod joint provided by one embodiment. As shown in fig. 1 to 3, the tripod type universal joint includes a tripod shell 1, a tripod 2 and a ball ring 3; the three pin joints 2 are assembled in the three pin shells 1 and comprise three pin shafts 21 which are uniformly arranged; the ball ring 3 is sleeved on the pin shaft 21 and forms a first raceway with the pin shaft 21; the tripod universal joint further comprises aligning rollers 4 arranged in the first roller path side by side, and the aligning rollers 4 are abutted with the pin shaft 21 and the ball ring 3; and a second raceway for the ball ring 3 to slide is arranged in the three-pin shell 1, and the ball ring 3 is abutted against the three-pin shell 1.

Three pin shafts 21 are uniformly arranged on the three pin joints 2, each pin shaft 21 is sleeved with one spherical ring 3, and each pin shaft 21 and one spherical ring 3 are matched to form a first rolling way for placing a roller. Three second ball tracks for the ball ring 3 to slide are correspondingly and uniformly arranged on the three-pin shell 1. Wherein, ball ring 3 sets up in the second raceway of tripod shell 1 to ball ring 3 and the tripod shell 1 butt that the second raceway corresponds, through ball ring 3 and the mutual butt cooperation of tripod shell 1 with transmission moment of torsion, with the realization universal joint axial motion and angle beat. Because self-aligning roller 4 has automatic aligning performance, can bear great load, set up self-aligning roller 4 in first raceway, with round pin axle 21 butt on three round pin joints 2 and with the butt of spherical ring 3 to make mutual butt between self-aligning roller 4 and round pin axle 21 and the spherical ring 3 with the transmission moment of torsion, utilize self-aligning performance of self-aligning roller 4, change and to form certain change angle between spherical ring 3 and three round pin joints 2. Understandably, through the continuous structure, the pin shaft 21, the self-aligning roller 4, the spherical ring 3 and the tripod shell 1 of the tripod joint 2 are mutually extruded to transmit torque, and when the tripod shell 1 and the spherical ring 3 are matched to realize the axial direction movement and the angle deflection of the universal joint, a certain movement angle is formed between the tripod shell 1 and the tripod joint 2; the motion angle between the three-pin shell 1 and the three-pin joint 2 is compensated through the change angle formed between the ball ring 3 and the three-pin joint 2, so that the aims of reducing the sliding friction between the ball ring 3 and the three-pin shell 1, reducing the derived axial force, improving the transmission efficiency and reducing the vibration noise are fulfilled.

In the tripod universal joint provided by this embodiment, the aligning roller 4 disposed in the first raceway abuts against the pin 21 and the ball ring 3 of the tripod joint 2, and the ball ring 3 abuts against the tripod housing 1, so that the pin 21, the aligning roller 4, the ball ring 3 and the tripod housing 1 of the tripod joint 2 are mutually squeezed to transmit torque, and the tripod housing 1 and the ball ring 3 are matched to realize axial movement and angular deflection of the tripod joint, so that when a certain movement angle is formed between the tripod housing 1 and the tripod joint 2, the variation angle between the ball ring 3 and the tripod joint 2 can compensate the movement angle, thereby reducing sliding friction between the ball ring 3 and the tripod housing 1, reducing derived axial force, improving transmission efficiency and reducing vibration noise.

In one embodiment, as shown in fig. 2, the inner wall of the housing 1 corresponding to the second raceway is arc-shaped; the outer wall of the ball ring 3 is arc-shaped, and the radian of the outer wall of the ball ring 3 is matched with the radian of the inner wall of the three-pin shell 1, so that the ball ring 3 is in surface contact with the three-pin shell 1. Because the inner wall of the tripod shell 1 corresponding to the second raceway is arc-shaped, the outer wall of the ball ring 3 is arc-shaped, and the radian of the outer wall of the ball ring 3 is matched with the radian of the inner wall of the tripod shell 1, when the tripod joint 2 and the tripod shell 1 move relatively, the ball ring 3 on the tripod joint 2 moves on the second raceway and contacts with the surface of the tripod shell 1 corresponding to the second raceway to transmit torque, so that the ball ring 3 and the tripod shell 1 are more comprehensively contacted, the stress is more reasonable, the service life of the universal joint can be prolonged, and the sliding friction between the ball ring 3 and the tripod shell 1 can be further reduced, so that the purposes of reducing derived axial force, improving the transmission efficiency and reducing the vibration noise are achieved.

In one embodiment, as shown in fig. 2 and 3, the inner wall of the ball ring 3 is arc-shaped, and the radian of the inner wall of the ball ring 3 matches with the radian of the aligning rollers 4, so that the aligning rollers 4 are in surface contact with the ball ring 3. Because the self-aligning roller 4 has a certain radian, the inner wall of the ball ring 3 is arc-shaped, and the radian of the inner wall of the ball ring 3 is matched with the radian of the self-aligning roller 4, when the three pin joints 2 and the three pin shells 1 move relatively, the self-aligning roller 4 in the first roller path is in surface contact with the pin shaft 21 on the three pin joints 2 and the inner wall of the ball ring 3, and torque is transmitted by mutual extrusion; the spherical ball is in contact with the inner wall surfaces of the self-aligning rollers 4 and the spherical ring 3, so that the contact surface between the self-aligning rollers 4 and the inner wall of the spherical ring 3 is larger, the stress is more reasonable, the service life of the universal joint can be prolonged, the change angle formed between the self-aligning rollers 4 and the spherical ring 3 can more effectively compensate the motion angle formed when the three-pin joint 2 and the three-pin shell 1 move relatively, the sliding friction between the spherical ring 3 and the three-pin shell 1 can be further reduced, and the purposes of reducing the derived axial force, improving the transmission efficiency and reducing the vibration noise are achieved.

In one embodiment, as shown in fig. 2 and 3, the self-aligning rollers 4 are symmetrical spherical rollers. The symmetrical spherical roller is symmetrically arranged based on an axial symmetry axis and a radial symmetry axis. In this embodiment, the symmetrical spherical roller is divided into the roller upper portion and the roller lower portion of the symmetrical spherical roller based on the radial symmetry axis of the symmetrical spherical roller, and at this time, the spherical radians corresponding to the roller upper portion and the roller lower portion of the symmetrical spherical roller are matched with the radian of the inner wall of the spherical ring 3. It can be understood that, the corresponding spherical radians of the upper roller portion and the lower roller portion of the symmetrical spherical roller are both matched with the radian of the inner wall of the ball ring 3, so that when the three-pin joint 2 and the three-pin shell 1 move relatively, the upper roller portion or the lower roller portion of the symmetrical spherical roller is matched with the inner wall of the ball ring 3, so that the upper roller portion or the lower roller portion of the symmetrical spherical roller can contact with the inner wall of the ball ring 3, and the change angle formed between the upper roller portion or the lower roller portion of the symmetrical spherical roller and the ball ring 3 can more effectively compensate the movement angle formed when the three-pin joint 2 and the three-pin shell 1 move relatively, which is helpful for further reducing the sliding friction between the ball ring 3 and the three-pin shell 1, so as to achieve the purposes of reducing the derived axial force, improving the transmission efficiency.

In one embodiment, as shown in fig. 2 and 3, the symmetrical spherical rollers are spindle rollers. The spindle roller has a spindle-shaped cross section formed on the basis of an axial symmetry axis, the axial symmetry axis and a radial symmetry axis of the spindle-shaped cross section are perpendicular to each other, and the spindle roller can be divided into symmetrical upper roller portions and lower roller portions on the basis of the radial symmetry axis.

In one embodiment, as shown in fig. 2 and 3, two rows of self-aligning rollers 4 are arranged side by side on the first raceway. The number of the aligning rollers 4 per row may be determined by the diameter of the pin 21 of the three-pin joint 2 and the size of the aligning rollers 4, for example, two rows of roller bearings formed by 18 aligning rollers 4 may be provided on the first raceway. Understandably, two rows of aligning rollers 4 are arranged on the first raceway side by side, so that the limiting effect can be better realized, and the direction of the aligning rollers 4 in the process of transmitting torque can be more favorably adjusted.

In one embodiment, as shown in fig. 2 and 3, the tripod joint further comprises a cage 5 disposed on the tripod joint 2 and located in the first raceway, the cage 5 being fitted with two aligning rollers 4. It can be understood that, a plurality of retainers 5 located on the first raceway are fixedly arranged on the three pin joints 2, and each retainer 5 is sleeved with two aligning rollers 4, so that the aligning rollers 4 are kept at the relative positions of the three pin joints 2 when transmitting torque, no displacement change occurs, and the adjustment of the change angle of the ball ring 3 relative to the aligning rollers 4 is facilitated.

Because two aligning rollers 4 are arranged on each retainer 5 on the first raceway, each aligning roller 4 comprises a roller upper part and a roller lower part, when the three-pin joint 2 moves relative to the three-pin shell 1, the upper part of the roller of the self-aligning roller 4 close to the tail end of the pin shaft 21 is abutted against the inner wall of the ball ring 3, the lower parts of the aligning rollers 4 far away from the tail end of the pin shaft 21 are abutted with the inner wall of the ball ring 3, so that the two aligning rollers 4 are abutted with the inner wall of the ball ring 3 to achieve the effects of aligning and transmitting torque, when the tripod shell 1 and the tripod joint 2 move relatively to form a certain movement angle, a change angle is formed between the tripod joint 2 and the ball ring 3, the formed movement angle is compensated by the change angle, therefore, the aims of reducing the sliding friction between the ball ring 3 and the three-pin shell 1, reducing the derived axial force, improving the transmission efficiency and reducing the vibration noise are fulfilled.

In one embodiment, as shown in fig. 1-3, the tripod joint further comprises an annular retainer ring 6 disposed at the end of the pin 21 and located in correspondence with the first raceway. The annular retainer ring 6 is fixedly arranged at the tail end of the pin shaft 21 and is positioned at the corresponding position of the first raceway for blocking the aligning roller 4 from being separated from the first raceway so as to ensure the normal work of the universal joint. In this embodiment, the annular retainer ring 6 is disposed at the end of the pin 21, and can be flush with the surface of the end of the pin 21 and extend from the end of the pin 21 to the radial direction thereof, so as to prevent the self-aligning roller 4 from being separated from the first raceway.

Because the first raceway is a raceway formed by matching the pin shaft 21 on the three pin joints 2 and the ball ring 3, the first raceway is an annular raceway, and in order to avoid the self-aligning roller 4 from being separated from the first raceway, the outer diameter of the annular retainer ring 6 can be matched with the outer diameter of the opening of the first raceway.

In one embodiment, the tripod joint further comprises an input shaft 7 and an output shaft 8, the input shaft 7 being splined to the tripod joint 2 and the output shaft 8 being fitted to the tripod housing 1. The input shaft 7 and the output shaft 8 of the tripod type universal joint are connected with different external structures so as to realize angle changing power transmission among the different external structures. The input shaft 7 is connected with the three pin joints 2 through splines, and has the advantages of uniform stress, capability of bearing larger load, higher guidance quality and alignment property and the like. It can be understood that the input shaft 7 is in spline connection with the three-pin joint 2, and the output shaft 8 is assembled on the three-pin shell 1, so that when the three-pin joint 2 is matched with the three-pin shell 1 to realize the axial movement and the angular deflection of the universal joint, the external structures connected with the input shaft 7 and the output shaft 8 are driven to move and angularly deflect, and the purpose of controlling the variable-angle power transmission between different external structures connected with the input shaft 7 and the output shaft 8 is achieved.

As shown in fig. 2, the input shaft 7 is provided with a first external spline 71, the three pin joint 2 is provided with a first internal spline 22, and the first external spline 71 and the first internal spline 22 are used for spline coupling, so that the coupling between the input shaft 7 and the three pin joint 2 has the advantage of spline coupling.

As shown in fig. 1 and 3, the output shaft 8 is provided with a second external spline 81, and the second external spline 81 can be in spline connection with a second internal spline matched with other external structures, so that the connection between the output shaft 8 and other external structures has the advantage of spline connection.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A tripod universal joint comprises a tripod shell, a tripod joint and a ball ring; the three pin joints are assembled in the three pin shells and comprise three pin shafts which are uniformly arranged; the ball ring is sleeved on the pin shaft and forms a first raceway with the pin shaft; the tripod type universal joint is characterized by further comprising aligning rollers arranged in the first roller path side by side, wherein the aligning rollers are abutted against the pin shaft and the spherical ring; and a second raceway for the ball ring to slide is arranged in the three-pin shell, and the ball ring is abutted against the three-pin shell.

2. The tripod joint of claim 1 wherein the inner wall of said tripod housing corresponding to said second raceway is arcuate; the outer wall of the ball ring is arc-shaped, and the radian of the outer wall of the ball ring is matched with the radian of the inner wall of the tripod shell, so that the ball ring is in surface contact with the tripod shell.

3. The tripod joint of claim 1 wherein the inner wall of the ball ring is arcuate and the curvature of the inner wall of the ball ring matches the curvature of the self-aligning rollers so that the self-aligning rollers are in surface contact with the ball ring.

4. The tripod joint of claim 1 wherein said self-aligning rollers are symmetrical spherical rollers.

5. The tripod joint of claim 4, wherein said symmetrical spherical rollers are spindle rollers.

6. A tripod joint according to claim 1, wherein two rows of said aligning rollers are provided side by side on said first track.

7. The tripod joint of claim 6 further comprising a cage disposed on said tripod and within said first raceway, said cage having two of said aligning rollers fitted thereover.

8. The tripod joint of claim 1 further comprising an annular retaining ring disposed at the end of said pin at a location corresponding to said first raceway.

9. The tripod joint of claim 1 further comprising an input shaft splined to said tripod and an output shaft mounted to said tripod housing.

10. The tripod joint of claim 9, wherein said input shaft is provided with a first external spline, said tripod is provided with a first internal spline, and said spline coupling is performed based on said first external spline and said first internal spline; and a second external spline is arranged on the output shaft.