Patent ID: 9133888
Filing Date: 2015-09-15
Classification: F16D

Abstract:
1. A constant velocity joint in the form of a counter track joint, comprising: an outer joint part which comprises a longitudinal axis and an attaching end and an aperture end which are axially opposed relative to one another, and which also comprises first outer ball tracks and second outer ball tracks; an inner joint part which comprises a longitudinal axis and an attaching portion for a shaft which points to the aperture end of the outer joint part, and which inner joint part comprises first inner ball tracks and second inner ball tracks, wherein the first outer ball tracks and the first inner ball tracks, together, form first pairs of tracks which, when the counter track joint is in an aligned position, widen towards the aperture end of the outer joint part, and wherein the second outer ball tracks and the second inner ball tracks, together, form second pairs of tracks which, when the counter track joint is in the aligned position, widen towards the attaching end of the outer joint part; a torque transmitting ball in each of the first pair of tracks and in each of the second pair of tracks; an annular ball cage which is arranged between the outer joint part and the inner joint part and comprises circumferentially distributed cage windows which each accommodate at least one of the torque transmitting balls; wherein, with coaxially aligned longitudinal axes of the inner joint part and of the outer joint part, the balls are held by the ball cage on a central joint plane and, in the case of an angular movement of the inner joint part relative to the outer joint part, the balls are guided onto an angle-bisecting plane between the longitudinal axes; wherein the centres of the balls of the first ball tracks, when said balls are moved along the outer and inner first ball tracks, each define a first track centre line, and wherein the centres of the balls of the second tall tracks, when said balls are moved along the outer and inner second ball tracks each define a second track centre line; wherein a first reference radius is defined between a radius centre on the longitudinal axis of the outer joint part and a central plane intersection point of the first track centre line and the central joint plane, wherein the radius centre is positioned at the intersection of the longitudinal axis and a line which runs through said central plane intersection point and which is perpendicular to a tangent on the first track centre line through the central plane intersection point; wherein, in the direction from the central joint plane towards the attaching end, at least a portion of the first track centre line extends radially inside a reference arc defined by the first reference radius.