| 摘要 |
1,163,181. Toothed gearing. H. STOECKICHT, S.-M. STOECKICHT, A. W. STOECKICHT, A. H. VON ANKERSCHOFFEN and L. NIESSEN-STOECKICHT. 24 April, 1967 [27 April, 1966], No. 18860/67. Heading F2Q. In a gear train comprising a centre or sun gear 1 meshing at least one planet or idler gear 2 in turn meshing a floating annulus gear 3 coaxial with the gear 1 and flexibly connected to a torque transmitting or reacting member, at least one member 10, resiliently mounted in the casing 7, is movable between a position supporting the annulus gear and a retracted position clear of the annulus gear, to support the latter only when it is stationary or running at low speed. The roller 10 is connected via springs 14 to a piston 15 in a cylinder into which air or liquid under pressure is directed to move the roller to its supporting position against a retraction spring 16. In Fig. 1, the gear 1 is connected by a double-toothed coupling to an input shaft, the idler gears 2 have fixed axes, and the output annulus 3 comprises two helical gears of opposite hand interconnected by a double-toothed coupling 4 which is in turn connected by a double-toothed coupling 5 to an output shaft 6. The shaft 6 drives, via bevel gears (33, 34) (Fig. 3, not shown), a governor (20) which controls a valve (21) to admit pressure fluid to the piston 15 below a predetermined speed, and to vent the line to the piston above said speed. In Fig. 4, a train comprises an input sun, output planets in a carrier connected to an output shaft, and a reaction annulus. A brake 28 is engaged to hold the annulus gear for drive, and released to disconnect the drive. A valve 29 in one position supplies pressure fluid to the piston 15, to extend the support roller 10, and isolates the brake, and in a second position supplies fluid to engage the brake and vents the line 19 to the piston 15. Retraction of the roller 10 may be mechanical. |
