To provide a constant-velocity joint with excellent constant-velocity property which requires no grease lubrication and hardly undergoes usage restrictions.
An annular space 5 which opens in an outer ring 1 at its one end is formed and three track grooves 6, 7 are respectively formed in an outer peripheral surface and an inner peripheral surface of the annular space 5 in such a manner that they extend in the axial direction. A pocket 12 is formed in a cage 10 incorporated in the annular space 5, and a ball 20 is incorporated in the pocket 12, the ball 20 being capable of rolling along the track grooves 6, 7. The outer ring 1 is formed as a molded product of synthetic resin so that the grease lubrication is not required. An annular leaf spring 32 is attached to the outer periphery of the outer ring 1. The outer ring 1 is clamped by the leaf spring 32 so as to be elastically deformed inwardly. A preload is applied to the contact portions between the ball 10 and the track grooves 6, 7 to eliminate the circumferential looseness, thereby improving the constant-velocity property.
FUKUZAWA SATORU
Higashio Masahiro
Torii Kazuhisa
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