Floating bush and outer bearing structure for mounting a shaft in a body rotatably

Claim 1

A bearing structure which supports a rotating shaft in a body, said body being formed with a lubricant-conducting passage which supplies lubricant comprising: a floating hollow-cylindrical bush supported loosely on the shaft with a clearance existing therebetween; and a hollow-cylindrical bearing held in the body with a clearance existing therebetween, said clearance between said body and said bearing communicating with said lubricant-conducting passage so as to receive lubricant therefrom, said bearing loosely supporting the bush with a clearance existing therebetween; the bush being free in use to turn with respect to the bearing and the shaft; the bush being formed with an even number n of circumferentially equally spaced passages extending radially from its outer cylindrical surface to its inner cylindrical surface, the bearing being formed with a lesser even number m of circumferentially equally spaced passages which extend from its outer cylindrical surface to its inner cylindrical surface and which are inclined with respect to the bearing radii in the direction opposite to the normal direction of rotation of the shaft, whereby the passages of the bush are arranged to come into register sequentially with the passages of the bearing as the bush rotates relative to the bearing, the radial angle subtended by the inner ends of the passages in the bearing being approximately 360°/m-360°/n.