Large-angle and high-efficiency ball-cage type constant-velocity universal joint with eight steel balls

Abstract

The invention discloses a large-angle and high-efficiency ball-cage type constant-velocity universal joint with eight steel balls. Each inner race of a bell-shaped shell and each outer race of a star-shaped sleeve are conjugate and composed of two sections of tangential and reverse arcs separately; the central line of the first pair of inner races is located at the outer side of the central line of an inner spherical surface, an angle between the connection line of the tangential point A of the central track A of a steel ball I and the center of an inner-side arc I, and the central line of theinner races is 2-4 degrees, the central lines of the second pair of inner races and the fourth pair of inner races are superposed with the central line of the inner spherical surface, and an angle between the connection line of the tangential point A of the central track A of each of a steel ball II and a steel ball IV and the center of the inner-side arc I, and the central line of the inner races is 4-6 degrees; and the central line of the third pair of inner races is located at the inner side of the central line of the inner spherical surface, an angle between the connection line of the tangential point A of the central track A of a steel ball III and the center of the inner-side arc I, and the central line of the inner races is 9-11 degrees. The large-angle and high-efficiency ball-cage type constant-velocity universal joint with the eight steel balls is capable of achieving an angle of 52 degrees, high in strength and transmission efficiency, more compact in structure, lighter inmass, and adaptive to use in a vehicle with a lower requirement on a vehicle turning radius.

Description

technical field [0001] The invention belongs to the field of auto parts and relates to a large-angle high-efficiency eight-steel ball cage type constant velocity universal joint. 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. [0003] Generally, a universal joint serves to transmit rotational power (torque) between two rotating shafts that meet at an angle to each other. In the case of propeller shafts with small power transmission angles, hook type universal joints, flexible joints, etc. are used, while in the case of drive shafts of front-wheel drive vehicles with large power transmission angles, constant velocity universal joints are used. to the knot. Because constant velocity joints can reliably transmit power at constant speeds even when the angle between the dri...

AI Technical Summary

Problems solved by technology

The smaller the angle of the universal joint, the smaller the turning radius of the vehicle, and the higher the performance of the vehicle. However, in order to achieve a smaller angle of the existing six-ball cage type constant velocity universal joint, the geometric size needs to be greatly reduced. , which directly leads to the strength and durability not meeting the design requirements

Therefore, the traditional six steel ball cage type constant velocity universal joint cannot meet the requirements of vehicles with small turning radius requirements.

In addition, the hooks of the bell shell and the star sleeve of the traditional six-ball cage type constant velocity universal joint are the same. Since the raceways of the two parts are eccentric relative to the spherical surface, in the case of a large angle , the outside of the outer spherical surface of the cage will squeeze the outer surface of the inner spherical surface of the bell-shaped shell, causing internal heat generation, reducing durability and transmission efficiency

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