| 摘要 |
A constant output transmission apparatus operable to transform a variable RPM input to an input shaft member through the use of double planetary gear set means and the use of a low range gear and clutch assembly and a high range gear and clutch assembly to transfer output through a ring gear and carrier assembly and an output ring gear assembly to an output shaft assembly to provide a constant RPM output to an output shaft member. The variable input to the input shaft member is constantly causing rotation of an input carrier plate assembly driving input planet gear members and, concurrently, driving an input drive gear assembly. The input gear drive assembly is operable to concurrently drive a low range gear and clutch assembly and a high range gear and clutch assembly. On activation of a respective low range clutch piston or a high range clutch piston, this operates to selectively operate and rotate a respective low range clutch assembly and a high range clutch assembly. This operates through the rotating input planet gear members and output planet gear members to rotate the output ring gear assembly and the ring gear and carrier assembly to provide the constant output to the output shaft member. A second embodiment of a constant output transmission assembly uses a single planetary gear set means, a single viscous clutch means, and one output ring gear assembly to achieve the constant RPM output.
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