Patent ID: 6319133
Filing Date: 2001-11-20
Classification: F16D,Y10S

Abstract:
A constant velocity universal joint for transmitting torque comprising:an outer joint part (31) with outer ball tracks (38) the outer joint part having a base end (35) closed by a base and an open end (37) defined by an aperture;an inner joint part (32) with inner ball tracks (42);torque transmitting balls (33) guided by pairs of outer and inner ball tracks (38, 42) positioned in corresponding meridian planes; anda ball cage (34) which lodges the balls (33) in circumferentially distributed windows (43) and holds the balls in a common plane and guides the balls onto an angle-bisecting plane (W) when the joint is articulated, with the outer and inner ball tracks (38, 42) having center lines composed of at least two differently curved portions (S.sub.a, S.sub.i) adjoining one another, with the center lines of the outer and inner ball tracks (38, 42) intersecting one another in the center of each ball and being symmetric relative to one another with reference to a central joint plane (E), wherein the center lines (S.sub.a) of the ball tracks (38) of the outer joint part (31) each comprise convexly curved inner portions (S.sub.1) and, towards the open end (37), oppositely curved concave first end portions (S.sub.2) and that the center lines (S.sub.i) of the ball tracks (42) of the inner joint part (32) each comprise convexly curved outer portions and, towards the base end (35) of the outer joint part (31), oppositely curved, concave second end portions.