| 摘要 |
A gearless transmission which uses one or more rectilinear drive mechanisms in series. The rectilinear drive mechanism comprises paired eccentric discs 31, 32, mounted on a crankpin 22 and guided by two pairs of rails, 26, 27, 36, 37 orthogonal to each other, such that the discs rotate in the opposite direction to the crank. The two pairs of rails are mounted on fixing plate 38. In the transmission, the fixing plate is allowed to rotate, in some modes of operation, which provides a 2:1 speed ratio. The reverse rotating orbital motion of the paired discs is converted to reverse rotation, concentric with the input shaft, by means of a multicrank coupling 45, 46. Clutches (not shown) are used to select reverse rotation, direct drive or variable ratio outputs. Embodiments of the same mechanism provide reciprocating motion along at least one axis and also along two orthogonal axes so that the invention can be used as a piston machine with built-in reverse motion shafts which may be selectable. |
