Tripod sliding type universal joint assembly

Abstract

The invention discloses a tripod sliding type universal joint assembly, which comprises a sliding sleeve and a three-fork bearing assembly arranged in the sliding sleeve. The sliding sleeve is provided internally with an arc-shaped raceway for the sliding of the three-fork bearing assembly. The three-fork bearing assembly includes a bearing frame with an involute spline in the middle, three pin shafts uniformly arranged on the bearing frame, and bearing outer rings, needle rollers, baffle rings and elastic snap rings mounted on respective pin shafts. The outer spherical surfaces of the bearingouter rings are matched with the raceway of the sliding sleeve. A groove is formed on the outer spherical surface of each bearing outer ring or a rough surface is laser-etched on the outer sphericalsurface of each bearing outer ring. The inner surfaces of the bearing outer rings are matched with the needle rollers. The inner surfaces of the bearing outer rings and the needle rollers are respectively in a corresponding spindle shape. The tripod sliding type universal joint assembly of the invention has the characteristics of sufficient lubrication, small friction force, high overall transmission efficiency, small running vibration and large working swing angle.

Description

technical field [0001] The invention belongs to the field of auto parts and relates to a tripod-pin sliding universal joint assembly. Background technique [0002] A high-performance constant velocity universal joint shaft assembly for a passenger car usually consists of a fixed universal joint, a sliding universal joint and an intermediate shaft connected between the universal joints. Sliding universal joints include tripod type and ball cage type. At present, there are many tripod sliding universal joints in the market, which include sliding sleeve and three-prong bearing assembly, and the three-prong bearing assembly is inside the sliding sleeve. It can slide. The three-prong bearing assembly includes a bearing frame. There are three pin shafts evenly arranged on the bearing frame. The pin shafts are equipped with bearing outer rings, needle rollers, retaining rings and elastic snap rings. The outer ends of the needle rollers are supported by retaining rings. And elastic...

AI Technical Summary

Problems solved by technology

However, due to the large contact area between the outer surface of the bearing outer ring and the raceway of the sliding sleeve, the inner surface of the outer ring and the needle roller, and the needle roller and the pin shaft of the bearing frame, the lubrication is insufficient, resulting in greater frictional resistance. There is no degree of freedom to swing around the Y axis between the needle rollers, which affects the transmission efficiency, NVH performance and universal joint swing angle range of the vehicle

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