Plunging type constant velocity universal joint.

摘要

An outside member (22) connected to a first shaft (20) is provided on the inner peripheral surface with three grooves (34) extending in the axial direction of the first shaft (20) at circumferentially equal intervals. An inside member (26) connected to a second shaft (24) has roller shafts (28) extending outward in the radial direction of the second shaft (24) so as to respectively enter into the grooves (34) of the outside member, each roller shaft (28) being provided on the outer periphery with a convex spherical surface (29). A cage (30) provided on the inner periphery with a concave spherical surface (31) is mounted on each roller shaft (28) by fitting the concave spherical surface (31) to the covex spherical surface (29) of the roller shaft (28). A ring-like roller (32) is rotatably supported by the cage (30) to contact with the outside member (22). When the first shaft (20) and the second shaft (24) are rotated with a joint angle made between the first and second shafts, the position of the roller (32) relative to the axis of the first shaft (20) is maintained constant. The cage (30) and the roller (32) are capable of moving relative to each other in the radial direction orthogonal to the axis of the first shaft (20). <IMAGE>