US 2007/0167243 A1 · Constant velocity joint

Abstract

An annular member is installed on a circular cylinder section of a trunnion, and a roller member, in the inner periphery of which a needle bearing is held, is installed on the circular cylinder section. The needle bearing is held between a flange section formed on one end of the roller member and the annular member installed on the trunnion with a predetermined gap between them. Further, a gap (X) between the needle bearing and the annular member is set to satisfy the following relationship. X>R/2·(1/cos θ max−1) where R: Radius of rotation of the center of the roller member relative to the center axis of an outer member. θ max: Maximum inclination angle of an inner member.

Claims16

Dependent claims

A constant-velocity joint having a tubular outer member having a plurality of axially extending guide grooves defined in an inner circumferential surface thereof and spaced at predetermined intervals, said outer member being connected to one transmission shaft, and an inner member inserted in an open internal space of said outer member and connected to another transmission shaft, wherein

said inner member comprises:
a plurality of trunnions projecting into said guide grooves;
a ring-shaped roller held in contact with each of said guide grooves and fitted over each of said trunnions;
and
a plurality of rolling elements rollingly interposed between each of said trunnions and said roller;
said roller having a flange disposed on an inner circumferential surface thereof near a projecting end of each of said trunnions, said flange projecting radially inwardly and circularly extending along said inner circumferential surface;
wherein an annular member is mounted on said trunnion near a proximal end thereof;
said rolling elements being retained between said flange and said annular member.

5 more elements

said inner member comprises:
a plurality of trunnions projecting into said guide grooves;
a ring-shaped roller held in contact with each of said guide grooves and fitted over each of said trunnions;
and
a plurality of rolling elements rollingly interposed between each of said trunnions and said roller;
wherein a gap H between a proximal end of said trunnion and said rolling elements or said roller is set with respect to with respect to a distance δ by which said roller is movable with respect to said proximal end, according to the relationship:
H>δ=R/2·(1/cos θ max−1)
where R:
the radius of rotation of the center of said roller around a central axis of said outer member;
and
θ max:
the maximum angle of tilt of said other transmission shaft with respect to said one transmission shaft.

9 more elements

Dependencies are inferred from the claim text.

Constant velocity joint

Life of this patent

Constant velocity joint

Life of this patent

Abstract

Claims16