Machine element or mechanism – Elements – Gear casings
Patent
1978-12-06
1981-09-29
Husar, C. J.
Machine element or mechanism
Elements
Gear casings
74768, F16H 4704
Patent
active
042915929
ABSTRACT:
A hydromechanical drive has an input shaft connected permanently to the input of a variable-volume hydraulic pump and to the planet carrier of a summing transmission. The pump in turn drives a motor which in turn rotates the sun gear of this summing transmission, which has a first planet gear meshing with the sun gear and with a respective ring gear and a second planet gear meshing with the first planet gear and with a respective ring gear. A planetary-gear output transmission has its planet carrier connected to the ring gear of the second planet gear of the summing transmission and a planet carrier connected permanently to the output shaft of the drive and connectable through an openable clutch to the ring gear of the first planet gear of the summing transmission. In addition this output transmission has a first planet gear meshing with the respective sun gear and with a respective ring gear and a second planet gear meshing with the respective first planet gear and with its own ring gear. Brakes can arrest either of the ring gears of the output transmission. This output transmission can be replaced by a constant-mesh stepdown gear box. Thus the force applied to the input shaft of the transmission is split up and fed to the summing transmission in part directly and mechanically and in part through the hydrostatic transmission formed by the pump and the motor.
REFERENCES:
patent: 3884095 (1975-05-01), Miyao et al.
patent: 3969957 (1976-07-01), DeLalio
patent: 3979972 (1976-09-01), Sakai et al.
patent: 4164156 (1979-08-01), Reed
Ehrlinger Friedrich
Meyerle Michael
Husar C. J.
McKenzie Frank
Ross Karl F.
Zahnradfabrik Friedrichshafen Aktiengesellschaft
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