STRENGTHENING DEVICE WITH A BIG AREA OF HARDENESS CONDITIONS

摘要

A power drive line in which a continuously variable, nutating drive transmission unit 16 is combined with a single planetary gear set 84, 86, 88 to provide two forward modes and a reverse mode of the transmission. Two transmission unit input shafts 18, 20 are alternately coupled to a power input to the overall driveline. In one forward mode, the planet gear 86 is driven by the sun gear 84 to rotate the ring gear 88 in a relatively wide low speed range of speed ratios. In another forward mode, the transmission body 52 carrying the planet gear 86 is arranged to be driven directly by the drive line power input to effect a high range of output speeds for a given input speed. In the reverse mode, the body 52 carrying the planet gear 86 is held against planetary movement so that the planet gear 86 operates as an idler between the sun gear 84 and the ring gear 88. IMAGE