Tripod-ball assembly of tripod universal joint

Abstract

The present invention discloses one kind of three ball-and-spigot assembly for three ball-and-spigot gimbal. The three ball-and-spigot assembly includes one three spigot frame and three pin shafts separated by 120 deg and mounted onto the three spigot frame, as well as ball rings on the pin shafts and roller race with parallel needle rollers between the ball ring and pin shaft. The present invention features the needle roller with outside retaining ring and the pin shaft with fixed elastic collar and fitting the retaining ring, and has the advantages of surface contact between the retaining ring and the elastic collar, raised capacity of the retaining ring in bearing axial force of the needle roller, firm fixing of the needle rollers, etc.

Description

technical field [0001] The invention relates to a tripod assembly of a tripod type constant velocity universal joint (TJ type constant velocity universal joint). Background technique [0002] The three-ball pin assembly is the core component of the three-ball constant velocity universal joint. Its main function is to transmit the torque from the engine gearbox to the wheel through the moving end. The traditional three-ball pin assembly structure (as shown in Figure 1) It includes a three-pin frame 1, three pin shafts 2 installed on the three-pin frame 1 and spaced 120° apart from each other, the ball ring 3 is set on the outside of the pin shaft 2, and a raceway is arranged between the ball ring 3 and the pin shaft 2, so that Needle rollers 4 are arranged side by side in parallel in the above-mentioned raceway, and the outside of the needle rollers 4 is closed with a needle roller retaining ring 5 to prevent the needle rollers 4 from falling. The needle roller retaining ring...

AI Technical Summary

Problems solved by technology

In engineering, the three-ball pin assembly is required to transmit power while satisfying a certain swing angle and flexible axial movement, no stagnation, and no noise. However, if a relatively large swing angle is required, the ball ring 3 must have a relatively large slip Therefore, the right angle of the roller retaining ring 5 is bent upward relatively high, so that the flanging of the edge of the roller retaining ring 5 is set very high, and it is easy to appear that the roller retaining ring 5 and the three-ball pin rotate together. The inner wall of the housing 7 outside the three-ball pin contacts and interferes, deforming the needle roller retaining ring 5, causing the needle roller 4 and the ball ring 3 to fall off, thereby affecting the service life of the entire three-ball pin assembly, and generating a lot of noise , affecting the environment

In addition, because the circlip 6 is a steel wire with a circular cross section, the retaining ring and the circlip 6 are in point contact with force, so the retaining ring 5 is easy to fall off from the circlip 6, and the cross section is circular. The retaining ring 6 itself is also easy to slip out of its shaft groove when the tripod assembly is working, which also greatly reduces the service life of the whole tripod assembly

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