Ball head type tripod universal joint with composite structure

Abstract

The invention discloses a ball head type tripod universal joint with a composite structure. The ball head type tripod universal joint with the composite structure mainly comprises a tripod, inner rings, outer rings, check rings and bearings, wherein the bearings are mounted on three journals of the tripod, the inner rings of the bearings are fittingly sleeved on the journals of the tripod, the outer rings are fittingly mounted on the outer diameter of the inner rings, and the outer diameter of the inner rings is fittingly contacted with the inner diameter of the outer rings to realize circumferential fixation; the two ends of the inner rings are axially positioned through check rings fixed to the outer rings; and grooves are designed in the inner hole walls of the outer rings and the outerhole walls of the inner rings, and solid lubricants are filled in the grooves. According to the ball head type tripod universal joint with the composite structure, few parts of a constant-speed transmission shaft are realized, and parts such as a tripod universal joint roller pin and lubricating grease between a ball ring and the roller pin are cancelled; the structure is simple, and the self-lubricating function is achieved; and the roller pin is omitted, the shaft diameter of the tripod is increased, the structure of the tripod universal joint is simplified, the technical requirement is low, assembling is convenient, the manufacturing difficulty and the manufacturing cost are reduced, the strength of the tripod universal joint is improved, and the service life of the tripod universal joint is prolonged.

Description

technical field [0001] The invention relates to the field of universal joints, in particular to a ball-type tripod joint with a composite structure. Background technique [0002] The constant velocity universal joint is a device that connects two shafts with an angle between the shafts or changes in mutual position, and makes the two shafts transmit power at the same angular velocity. speed problem. Ball-type tripods are commonly used because they work well at larger swing angles. The main structure of the ball-type tripod joint of the prior art is as attached Figure 1 As shown, it mainly includes: tripod frame 1, needle retaining ring 2, original inner ring 3, needle roller 4, original outer ring 5, small bearing assembly 6, in order to ensure that the tripod will not fall off during assembly and work If the needle does not get stuck, it is necessary to use the needle retaining ring 2 and apply an appropriate amount of grease between the original outer ring 5, needle rol...

AI Technical Summary

Problems solved by technology

At the same time, it is necessary to ensure the circumferential gap between the needle rollers 4, the radial clearance between the original outer ring 5, the original inner ring 3 and the needle roller 4, the axial clearance between the original inner ring 3 and the needle roller retaining ring 2, and the needle roller clearance. Dimensions such as the axial gap between the retaining ring 2 and the needle roller 4 meet the technical requirements, resulting in high performance requirements, difficult manufacturing and assembly, and high manufacturing costs

In addition, due to the large force on the needle roller 4 and the limitation of the space of the original outer ring 5 and the original inner ring 3, the needle roller 4 is fragile in a high-strength working environment, which will reduce the function of the tripod joint or fail , the service life of the ball ring assembly will be limited

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