Patent ID: 8888376

Claim:
A bearing structure comprising: a shaft member which rotates and extends in a horizontal direction; a bearing which fits externally onto the shaft member; a ring-shaped member which is arranged on an outer radial side of the bearing; a ring-shaped elastic body which is made of an elastic material, is fixed to an outer ring and encloses the ring-shaped member; and a cover member which is fixed to the shaft member and rotates in unison with the shaft member, wherein the shaft member is supported rotatably by the outer ring via the bearing, the ring-shaped elastic body includes, on one side in an axial direction, a rib which extends inward in the radial direction and extends in a circumferential direction so as to seal off a first gap formed between the cover member and the ring-shaped member, a second gap is formed between an inner radial end of the rib and the cover member, the cover member extends outward in the radial direction and extends in the circumferential direction so as to cover the rib and the second gap on the one side of the ring-shaped elastic body, and a cutout is formed in a portion of the rib, said cutout extending in the circumferential direction.