Patent ID: 7862439
Filing Date: 2011-01-04
Classification: F16D,Y10S

Abstract:
1. A plunging constant velocity universal joint comprising: an outer joint part having a plurality of track grooves formed on a cylindrical inner circumferential surface thereof and extending in an axial direction; an inner joint part having a plurality of track grooves formed on a spherical outer circumferential surface thereof and extending in the axial direction; n number of torque transmitting balls, each torque transmitting ball being disposed in a ball track formed by a pair of one track groove of the plurality of track grooves of the outer joint part and one track groove of the plurality of track grooves of the inner joint part, so as to form a plurality of ball tracks; and a cage having pockets for retaining the torque transmitting balls, wherein the center of a spherical outer circumferential surface and the center of a spherical inner circumferential surface of the cage are offset by the same distance in opposite directions along an axis about the center of the joint, wherein the ball tracks form a circumferential arrangement with a uniform pitch, and the pockets of the cage form a circumferential arrangement with a random and non-uniform pitch.