| 摘要 |
A continuously variable transmission device has planetary members ( 23 ) in rolling contact with radially inner and outer races ( 12, 14; 36, 37 ) each comprising axially spaced relatively axially movable parts, and control means ( 18 ) for determining the axial separation of the parts ( 12, 14 ) of one of the two races, in which the planetary members ( 23 ) are connected for drive transmission to an input or output member ( 30 ) of the transmission device by connection means which allows the radial position of the planets to vary in response to variation in the axial separation of the parts ( 12, 14 ) of the said one of the two races ( 37 ), and in which the generatrix of the curved surface ( 70, 71 ) of at least one of the races ( 37 ) and/or planetary members ( 23 ) is non-circular.
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