Rolling bearing with seal

摘要

A seal lip having: a cylindrical seal surface in close contact with an outer peripheral surface of an inner race with outer side and inner side surfaces standing upright respectively from an outer end and an inner end of the seal surface and reaching a lip supporting portion of a seal member, and protruding on an inner peripheral surface of the lip supporting portion. The outer side surface is a perpendicular surface standing upright from the outer end of the seal surface in a direction perpendicular to a generating line of the outer peripheral surface of the inner race. The inner side surface includes: a perpendicular surface standing upright from the inner end of the seal surface in parallel with the outer side surface; and a conical surface inclined toward the outer side surface extending outward in a radial direction from an outer peripheral end of the perpendicular surface.

主权项

1. A rolling bearing with seal comprising:
an inner race; an outer race surrounding the inner race; a plurality of rolling members arranged circumferentially and interposed between the inner and outer races; and a pair of annular seal members disposed between the inner and outer races and covering opposite sides of the rolling members, wherein an attachment bead to be fixed to the outer race is formed on an outer periphery of each of the seal members, wherein a seal lip rotatably and slidably placed in contact with an outer peripheral surface of the inner race is formed on an inner periphery of each of the seal members, wherein an annular lip supporting portion having a larger thickness than that of the seal lip, which is measured in a direction along a generating line of the outer peripheral surface of the inner race, is formed on the inner periphery side of the seal member, wherein the seal lip protrudes from an inner peripheral surface of the lip supporting portion, the seal lip having: a cylindrical seal surface placed in contact with the outer peripheral surface of the inner race; and an outer side surface and an inner side surface standing upright respectively from an outer end and an inner end of the seal surface and reaching the lip supporting portion, wherein the outer side surface is formed as a perpendicular surface standing upright from the outer end of the seal surface in a direction perpendicular to the generating line of the outer peripheral surface of the inner race, and wherein the inner side surface includes: a perpendicular surface standing upright from the inner end of the seal surface in parallel with the outer side surface; and a conical surface inclined toward the outer side surface while extending outward in a radial direction from an outer peripheral end of the perpendicular surface, and reaching the lip supporting portion.