Fixed constant velocity universal joint

Abstract

Provided is a fixed constant velocity universal joint of a structure, which easily allows incorporation of an inner ring into a cage without impairing a function of the joint. The fixed constant velocity universal joint has an outer ring having in an inner spherical surface thereof a plurality of track grooves arranged at equal circumferential intervals and extending axially toward an open end; an inner ring (28) having in an outer spherical surface (26) thereof a plurality of axially extending track grooves (27) paired with the track grooves of the outer ring and arranged at equal circumferential intervals; a plurality of balls interposed between the track grooves of the outer ring and the track grooves (27) of the inner ring (28), for transmitting torque; and a cage interposed between the inner spherical surface of the outer ring and the outer spherical surface (26) of the inner ring (28), for holding the balls, in which an outer ring open end side of the outer spherical surface (26) of the inner ring (28) is cut off, with a boundary portion (34) between a cutoff portion (33) thereby obtained and the outer spherical surface (26) being rounded.

Description

technical field [0001] The present invention relates to a fixed type constant velocity universal joint, which is used in power transmission systems of automobiles and various industrial machines in detail, and which only allows angular displacement between two shafts on the driving side and the driven side, etc. Speed ​​universal joint. Background technique [0002] For example, one type of constant velocity universal joint used as a device for transmitting rotational force from an engine of an automobile to a wheel at a constant velocity is a fixed type constant velocity universal joint. This fixed type constant velocity universal joint has a structure that connects two shafts on a driving side and a driven side, and can transmit rotational torque at a constant speed even if the two shafts take an operating angle. [0003] Generally speaking, a fixed constant velocity universal joint includes: an outer ring as an outer member in which a plurality of raceway grooves are for...

AI Technical Summary

Problems solved by technology

[0017] In particular, if the axial width of the inner ring is increased, even if Figure 9 As shown, with regard to the inner ring 8, the distance d between the boundary between one raceway groove 7 and the outer spherical surface 6 and the boundary between the opposite raceway groove 7 and the outer spherical surface 6 is set in advance so that it is smaller than that of the spacer ring 10 Dimple diameter D, when inserting the inner ring 8 from the dimple 15 of the spacer 10, as Figure 10 A part of the contour of the inner ring 8 in the region of the dimple 15, that is, the bottom side of the outer ring 6 of the outer spherical surface 6 of the inner ring 8 (part A in the figure) bulges out, causing interference. 15 Straight insertion into the inner ring 8 becomes difficult

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