Hydraulic-mechanical transmission system having output branches

Details Hydraulic-mechanical transmission system having output branches Hydraulic-mechanical transmission system having output branches

1984-05-14

1985-01-01

Herrmann, Allan D.

Machine element or mechanism

Elements

Gear casings

74681, F16H 4704, F16H 3706

Patent

active

044910347

ABSTRACT:
A continuously adjustable hydraulic-mechanical power transmission system has a mechanical part including an input shaft, forward gear and reversing gear controlled respectively by clutches for coupling with the input shaft; a planetary gear set has an annulus acting as a first shaft in continuous engagement with the forward gear and the reversing gear, a cage connected to a second shaft acting as an output of the system, and a sun wheel connected to a third shaft. The hydraulic part of the system includes an adjustable positive displacement hydraulic unit and a fixed displacement hydraulic unit hydraulically connected to the adjustable unit; the adjustable hydraulic unit is permanently connected to the reversing shaft of the mechanical unit and is hydraulically connected to the fixed displacement hydraulic unit, the range of the output rotational speed of the system always starts at one extreme adjusting position of the adjustable unit and ends at the opposite adjusting position of this unit for both directions of rotation.

REFERENCES:
patent: 3744344 (1973-07-01), Olsen et al.
patent: 3903755 (1975-09-01), Polak
patent: 3969958 (1976-07-01), Miyao et al.
patent: 4008628 (1977-02-01), Orshansky, Jr.
patent: 4313351 (1982-02-01), Hagin
patent: 4341132 (1982-07-01), Burdick

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