| 摘要 |
PCT No. PCT/EP83/00056 Sec. 371 Date Oct. 28, 1983 Sec. 102(e) Date Oct. 28, 1983 PCT Filed Feb. 28, 1983 PCT Pub. No. WO83/03289 PCT Pub. Date Sep. 29, 1983.A planetary gear assembly (10) having a stationary housing (18) and co-axial input and output shafts (12, 14) having the same diameter and spline formations of the same cross-sectional form on their adjacent end portions (12a, 14a). First and second sun gears (13, 15) are splined one onto each shaft end portion, a carrier (20) is rotatable about the axis of the input and output shafts, and planet gears (22, 23) carried by the carrier mesh with the sun gears. A brake (31) is provided to hold the carrier stationary so that the assembly operates in its planetary ratio. A clutch (27) is provided to clutch a torque transmitting member (24) which is splined onto either the input or output shaft to the carrier (20) to lock-up the assembly and provide a direct drive ratio. The arrangement allows either sun gear (13, 15) to be splined onto either the input or output shaft and the meshing planet gears to be located accordingly so that a given planetary gear assembly can be assembled to give either an overdrive or underdrive planetary ratio. The planetary ratio can be omitted if desired by joining the input and output shafts (12, 14) with an internally-splined sleeve (50). |
