To provide a uniform motion universal joint without drying up lubricating grease in a sliding part of inner/outer races by restraining the movement of the lubricating grease from the sliding part in boots without being damaged by expanding by centrifugal force or slipping out of a boot band when the boots of the uniform motion universal joint operate on mass of lubricating oil.
The lubricating grease is filled between the outer race 2 and the inner race 1, and the rubber bellows-shaped boots 8 are installed to straddle the outer periphery of the outer race 2 and the outer periphery of a shaft 7 held by the inner race 1. In these boots 8, a flexible and elastic granular foaming elastic resin 9 followable to bending deformation of the boots 8 is densely filled in its inside so that a lubricating grease infiltrating clearance is maximally eliminated, and an end part is sealed by belt-like fasteners (the so-called boot band) 10 and 11.
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro
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