Patent ID: 11920636
Assignee: NOK CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A sealing device adapted to be disposed between an inner member and an outer member of a rolling bearing, which rotate relative to each other, for sealing a gap between the inner member and the outer member, the sealing device comprising:
an annular rigid part that is adapted to be fixed to an inside of a hole of the outer member, the rigid part made from a rigid material; and
an elastic part fixed to the rigid part, the elastic part made from an elastic material,
wherein the elastic part comprises a seal lip having an outer peripheral surface shaped in a truncated cone, an inner peripheral surface shaped in a truncated cone that is substantially parallel to the outer peripheral surface, a proximal end, and a distal end that is configured to be in slidable contact with an outer peripheral surface of a cylindrical part of the inner member or a member fixed to the inner member,
wherein multiple bumps are formed on the inner peripheral surface of the seal lip, the multiple bumps being adapted to be always in slidable contact with the inner member or the member fixed to the inner member for providing clearances between the seal lip and the inner member or the member fixed to the inner member in vicinities the multiple bumps, and
wherein each of the multiple bumps comprises a parallel surface that is parallel to the inner peripheral surface of the seal lip, and an inclined surface continuing from the parallel surface, the parallel surface and the inclined surface of each of the multiple bumps being aligned along a generatrix of the inner peripheral surface of the seal lip shaped in a truncated cone, the parallel surface being disposed at the distal end of the seal lip, the inclined surface being disposed at an intermediate portion between the proximal end and the distal end of the seal lip, and the inclined surface having a height that decreases from the parallel surface to the inner peripheral surface at the proximal end of the seal lip.