SEALING DEVICE

摘要

A sealing device (31) for use in a bearing (21) comprising a first seal ring (32) and a second seal ring (35). The first seal ring (32) comprises a lip seal (33) having a lip part (33B) being fitted to the outer circumferential side of a coupling shaft (26) and coming into sliding contact with the end face (23B) of a bush part (23), and a sliding tube (34) provided integrally at the tubular section (33A) of the lip seal (33) and having a sealing face (34C) at the end face on the opposite side to the lip part (33B). The second seal ring (35) is fitted to the inner circumferential side of a boss (22) at the radial outside of the first seal ring (32) and has the inner side face of an annular inward protrusion (35C) working as a slide face (35D) that comes into sliding contact with the sealing face (34C) of the sliding tube (34).