Sealed Joint Assembly

A sealed joint assembly for use in a driveshaft of a motor vehicle, comprising:

• a constant velocity joint with an outer joint part having outer ball tracks, an inner joint part having inner ball tracks, torque transmitting balls which are guided in pairs of tracks each consisting of an outer ball track and an inner ball track, and a cage with cage windows in which the balls are received and held in a common plane;
• a sleeve which is firmly connected to the inner joint part and is coaxially arranged thereto;
• and
• a sealing mechanism comprising an annular cap fixed to the outer joint part, a sealing diaphragm which, by an outer collar, is firmly connected to the annular cap and which, by an inner collar, is sealingly connected to the sleeve, and a securing ring for fixing the inner collar on the sleeve;
• wherein the sleeve comprises a continuous annular groove which is engaged by the sealing diaphragm by an inner annular bead formed on the inner collar.