Universal joint for power transmission device of motor vehicle

摘要

The joint includes an outer body provided with a cylindrical hole and a first guide groove. An inner body (2) is provided with a second guide groove (2a). Several balls transmit the torque distributed in a bolt rack, to the guide groove of the inner body. The first spherical outer surface of the inner body contacts with the cylindrical hole of the outer body. A holder (14) is provided with a ball pocket (4a), a cylindrical surface (4b) and an outer surface (4c). The cylindrical surface is provided with partial spherical surfaces (4b1,4b2) on both sides, and has length which can absorb the amount of movement of the engine during starting of the motor.