Fixed-type constant velocity universal joint

Abstract

Provided is a fixed-type constant velocity universal joint. Track grooves of an outer joint member are constituted by first track groove parts (7a) that are positioned on a rear side and second trackgroove parts (7b) that are positioned on an opening side. The first track groove parts (7a) have ball track center lines (Xa) of a single radius of curvature (R1) having a center of curvature that isnot offset in an axial direction with respect to a joint center (O). Planes (M) that contain the ball track center lines (Xa) and the joint center (O) are inclined with respect to an axis (N-N) of thejoint and the inclination directions are formed in mutually opposite directions in first track groove parts (7a) that are adjacent to each other in a circumferential direction. Ends (A) of the ball track center lines (Xa) of the first track groove parts (7a) are positioned closer to the opening side than the joint center (O). Ball track center lines (Xb) of the second track groove parts (7b) areconnected to the ends (A). Ball track center lines (Y) of track grooves of an inner joint member are formed so as to be mirror images of ball track center lines of the track grooves of the outer jointmember, which form pairs therewith, about a plane (P) that includes the joint center (O) at an operation angle of 0 degree and is perpendicular to the axis (N-N) of the joint. The fixed-type constantvelocity universal joint is characterized in that the ball track center lines (Xb) of the second track groove parts (7b) have a single radius of curvature (R2) having a center of curvature that is offset with respect to the axis (N-N) of the joint in a radial direction and in that the radius of curvature (R2) is set to be larger than the radius of curvature (R1).

Description

technical field [0001] The present invention relates to a fixed constant velocity universal joint, in particular, to a fixed constant velocity universal joint that allows only angular displacement between two shafts on the drive side and the driven side, and is used in power transmission systems of motor vehicles and various industrial machines. Type constant velocity universal joint. Background technique [0002] For example, on the drive shaft for the front part of a motor vehicle, a sliding constant velocity universal shaft that can be axially displaced at a working angle is usually installed on the inner disc side (differential side) although the maximum operating angle is relatively small. For the coupling, on the outer disc side (wheel side), since the wheels steer, a fixed constant velocity universal joint that cannot be displaced in the axial direction is incorporated although it can have a large operating angle. [0003] A fixed constant velocity universal joint of...

AI Technical Summary

Problems solved by technology

[0002] For example, on the drive shaft for the front part of a motor vehicle, a sliding constant velocity universal shaft that can be axially displaced at a working angle is usually installed on the inner disc side (differential side) although the maximum operating angle is relatively small. For the coupling, as far as the outer disc side (wheel side) is concerned, since the wheel turns, it is equipped with a fixed constant velocity universal joint that cannot be displaced in the axial direction although it can have a large working angle

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