To reduce resistance due to grease or air during plunging.
This double offset type constant velocity universal joint comprises an outer ring 10 having ball grooves 16 formed at circumferentially equal spaces axially extending to a cylindrical inner peripheral face 14, an inner ring 20 having ball grooves 26 formed at circumferentially equal spaces axially extending to a spherical outer peripheral face 24, balls 30 laid between the ball groove 16 of the outer ring 10 and the ball groove 26 of the inner ring 20 paired with each other, and a cage 40 laid between the inner peripheral face 14 of the outer ring 10 and the outer peripheral face 24 of the inner ring 20 for holding the balls 30. Herein, communication passages 15, 17, 27 are provided which can be not only angle-displaced but also axially displaced between the outer ring 10 and the inner ring 20 for allowing the movement of grease or air between the corner side and the opening side inside the outer ring during axial displacement.
Yoshiyuki Shiraishi
Kunihiko Shiromura
Next Patent: GYROSCOPE PRECESSION MOVEMENT AUTOMATIC TRANSMISSION