Planetary backward and forward drive apparatus

Details Planetary backward and forward drive apparatus Planetary backward and forward drive apparatus

1986-04-07

1988-01-12

Herrmann, Allan D.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74802, 192 8717, F16H 344, F16H 5710

Patent

active

047183055

ABSTRACT:
There is disclosed a planetary backward and forward drive apparatus comprising a planetary gear mechanism disposed between an input and an output shafts. The planetary gear mechanism includes a carrier connected to the input shaft, two step planet gears supported by the carrier and consisting of a large first gear and a small second gear, a first sun gear connected to the output shaft, and a second sun gear freely rotatably mounted on the first sun gear and meshing with the second gear. A forward drive condition is provided when the carrier and the second sun gear are connected to each other by an operation of a hydraulic clutch, and a backward drive condition is provided when the second sun gear is fixed to a stationary case by an operation of a hydraulic brake.

REFERENCES:
patent: 2336459 (1943-12-01), Banker
patent: 2464538 (1949-03-01), Vandevzee
patent: 2488540 (1949-11-01), Hollingsworth
patent: 2979176 (1961-04-01), Voth
patent: 3009370 (1961-11-01), Frost
patent: 4528872 (1985-07-01), Umemoto et al.
patent: 4532827 (1985-08-01), Beim

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