Toroidal Race Rotary Traction Type Gear Ratio Continuously Variable Transmission

摘要

PCT No. PCT/GB93/01358 Sec. 371 Date Dec. 13, 1994 Sec. 102(e) Date Dec. 13, 1994 PCT Filed Jun. 29, 1993 PCT Pub. No. WO94/01697 PCT Pub. Date Jan. 20, 1994A roller-control unit for a continuously-variable-ratio transmission of the toroidal-race rolling-traction type, in which the roller carriage (10, 14) is connected by a pivotal joint (30) to the piston (15) of a hydraulic piston-and-cylinder unit (15, 16). The piston (15) is double-acting, and the piston/cylinder contact is the only locus through which the roller carriage (10, 14) makes contact with the fixed structure of the transmission. The piston (15) may have an inner part (32) to which the roller carriage (10, 14) is jointed, and a sleeve-like outer part (33, 34) which makes the necessary sliding and sealing contacts with the cylinder (16), but allows the roller carriage (10, 14) the necessary freedom of pivoting movement during use.