Fixed Constant Velocity Universal Joint

Abstract

The present invention relates to an eight-ball non-undercut type fixed constant velocity universal joint capable of improving torque capacity at high operating angles while ensuring durability at low operating angles. In this eight-ball non-undercut type fixed constant velocity universal joint, the center of the track groove (32) of the outer joint member and the center of the track groove (32) of the inner joint member are separated from the joint center plane (P) respectively. They are separated on both sides in the axial direction, and are biased at positions separated from the center axis (X) of the joint to the opposite side in the radial direction with respect to these track grooves (32). The distance between the center of the track groove (32) of the outer joint part and the center of the ball (37) is Rt, and the axial distance between the center of the track groove (32) of the outer joint part and the center plane (P) of the joint When it is F, the ratio R1 of F to Rt is 0.061R1≤0.087, and when the distance between the center of the track groove (32) of the outer joint member and the central axis (X) of the joint, that is, the offset in the radial direction is fr, The ratio R3 of fr to Rt is 0.07≤R3≤0.19.

Description

technical field [0001] The present invention relates to a fixed constant velocity universal joint, in particular to a type that only allows angular displacement between two shafts on the driving side and the driven side connected together, used in motor vehicles or various industrial machinery An undercut type fixed constant velocity universal joint with eight torque transmission balls used in the power transmission system. Background technique [0002] Among the fixed type constant velocity universal joints, there are cage type (BJ) (for example, Patent Document 1), unundercut type (UJ), and the like. [0003] Ball cage type fixed constant velocity universal joints, such as Figure 13 As shown, the outer ring 3 as the outer joint part has a plurality of track grooves 2 formed at equal intervals in the circumferential direction on the inner spherical surface 1 along the axial direction, and the outer ring 3 is formed on the outer spherical surface 4 at equal intervals in the...

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Problems solved by technology

In addition, in Patent Document 5, there are also six balls, and there is no linear portion of the track groove.

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