Sealed thrust ball bearing

A sealed thrust ball bearing for use in a strut type suspension device, comprising:

• an inner ring and an outer ring opposing each other in an axial direction;
• a plurality of balls arranged between opposing surfaces of the inner ring and the outer ring so as to be able to roll;
• and
• an inner elastic sealing member and an outer elastic sealing member which seal between inner circumferential portions of the inner ring and the outer ring and between outer circumferential portions of the inner ring and the outer ring and are integrated with the inner ring by coating the inner ring with an elastic body, the sealed thrust ball bearing being used by assembling the outer ring to a lower member disposed below the outer ring, wherein
• the inner elastic sealing member includes an inner cylindrical base portion leading to an end portion of an inner cylindrical portion of the inner ring, and also includes, at an outer circumferential surface of the inner cylindrical base portion, a projection extending radially outward of an inner periphery of a lower end of an inner cylindrical portion of the outer ring,
• the outer elastic sealing member includes a lip extending radially inward so as to be brought into pressure contact with a pressure contact surface in a radially outer surface of the outer ring, and
• at a time of completion of assembling the inner ring, the outer ring, and the lower member, an upper surface of the projection of the inner elastic sealing member is spaced downward from the lower end of the inner cylindrical portion of the outer ring, and an outer circumferential surface of the projection is spaced radially inward from the lower member.