Control mechanism for hydrostatic transmissions

Details Control mechanism for hydrostatic transmissions Control mechanism for hydrostatic transmissions

1977-06-24

1978-09-05

Herrmann, Allan D.

Machine element or mechanism

Mechanical movements

Oscillating to oscillating

74470, 74516, F16H 2144, G05G 704

Patent

active

041110625

ABSTRACT:
A rocker shaft is rotatably mounted and integral with a control valve of a hydrostatic transmission. The valve shaft may be rotated in an arc to either side of a neutral position. A housing is mounted to the control valve with rocker shaft projecting into the housing. A pair of levers are pivotally mounted on the rocker shaft in scissored relationship thereon and an actuating arm is rotatably mounted on the housing to engage camming surfaces defined on first ends of the levers. A drive member or dog is secured to the rocker shaft to engage between second ends of the levers whereby pivotal movments of the actuating arm will transmit pivotal movements of the levers to the rocker shaft to control mechanisms of the control valve. The second ends of the levers are biased towards each other into engagement with the drive member by a coil spring and a stop lug is secured on each of the levers to engage and pivot the other one of the levers in response to pivotal movements of the actuating arm. The stop lug is incorporated as a device to assure positive response of the valve shaft at a high speed reversal of an input shaft secured to the actuating arm.

REFERENCES:
patent: 2231609 (1941-02-01), Andersen
patent: 2777329 (1957-01-01), Banker
patent: 3055226 (1962-09-01), Kiessling
patent: 3491605 (1970-01-01), Macdonald

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