| 摘要 |
The invention relates to a boot for a universal shaft coupling, by which an improvement of an assembling workability can be expected, and an improvement of a sealing performance can be expected. The boot for the universal shaft coupling is formed by a rubber elastic body, and separated portions ( 22 ) are formed linearly along a generatrix. A fastener pair ( 26 ) is arranged in both sides of the separated portions ( 22 ) so as to form a seal portion. The fastener pair ( 26 ) is constituted by an occluding portion ( 32 ) formed in one end edge of the separated portion ( 22 ) and provided with a bulge locking portion ( 32 a) in a leading end, and an occluded portion ( 34 ) formed in another end edge of the separated portion ( 22 ) and provided with an occluding groove ( 33 ) occluding with the bulge locking portion ( 32 a). A guide fin ( 36 ) is provided in an inner side of the occluding groove ( 33 ) on a separated portion end surface ( 22 b) in a side forming the occluded portion of the separated portion ( 22 ), in a side of a crest portion ( 28 ) of a bellows portion ( 24 ). The guide fin ( 36 ) is provided a guide surface ( 40 ) at a position partly overlapping the occluding portion ( 32 ) at a time of facing to the occluding portion ( 32 ).
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