| 摘要 |
PCT No. PCT/US80/00347 Sec. 371 Date Mar. 31, 1980 Sec. 102(e) Date Mar. 31, 1980 PCT Filed Mar. 31, 1980 PCT Pub. No. WO81/02921 PCT Pub. Date Oct. 15, 1981.A compact planetary differential (10) is provided including first and second planetary sets (16,18) individually having ring, sun, and carrier elements (26,28,30,34,36,38), a rotary input member (12), first and second output members (20,22) individually connected to a preselected first one of the elements of the respective planetary sets, and with preselected second ones of the elements of the respective planetary sets being connected for joint rotation. A multi-speed unit (14) desirably always drives the output members at equal torque levels while imparting multi-speed capability thereto. The multi-speed unit is driven by the input member and drives the remaining third one of the elements of the second planetary set in at least one speed. The multi-speed unit (14) preferably includes a third planetary set (44), one brake assembly (54) and a clutch assembly (102), or two brake assemblies (54,56) connected to preselected ones of the ring, sun, and/or carrier elements thereof.
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