| 摘要 |
The invention relates to a universal joint boot whose portion between a small diameter ring and a large diameter ring is in the form of a bellows and which is formed with split sections (22) linearly extending from the small diameter ring portion to the large diameter ring portion along a generatrix, and an object of the invention is to improve the assemblability and sealing performance. A pair of fasteners (26) are disposed on opposite sides of the split sections. The pair of fasteners comprise a strip-like occluding section (32) formed in one end edge (22a) of the split sections and having a bulgy locking section (32a) at the front end, and a strip-like occluding subject section (34) formed in the other end edge (22b) of the split sections and having an occlusion groove (33) adapted to occlusally engage the bulgy locking section. The end surface of the split sections on the occluding subject section side is formed with a guide fin (36) having a guide surface (40) which is in a position to partially overlap the occluding section when opposed to the latter inside the occlusion groove, the guide fin projecting only to the ridge side of the bellows. Alternatively, the first valley section of the bellows on the large diameter ring section side is provided on its inner peripheral surface with a grease turning rib. |
