Planetary-rotor hydraulic motor with reversing mechanism

Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers

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F03C 208

Patent

active

046574948

ABSTRACT:
A planetary-rotor hydraulic motor in a housing enclosed on two sides by first and second cover plates, of which there is disposed a shaft carrying a gear fixedly secured thereon and engageable with an inner toothing of a rotor arranged with an eccentricity relative to the shaft to form variable volume chambers, an outer toothing of the rotor engaging with an inner toothing of the housing and a fluid distributor serving to alternately communicate the variable volume chambers with holes in the second cover plate for feeding and discharging a fluid through a control valve accommodated in the second cover plate and resiliently urged to the fluid distributor, the control valve defining by its side opposite to the one facing the fluid distributor with the second cover plate a cavity continuously communicating through a damping passage with the hole for feeding the fluid. Further provided in the hydraulic motor are a reversing mechanism which comprises a toothed rack received by a drilling made in the second cover plate and having at rack ends pistons which form piston spaces in the drilling, a toothed sector made on the periphery of the control valve to engage with the toothed rack, and a solenoid-operated fluid distributor secured on the second cover plate communicating in its neutral position with the hole for feeding the fluid and continuously communicating with the cavity formed between the control valve and the second cover plate for periodically connecting therewith the piston spaces to adjust the toothed rack and turn the control valve relative to the second cover plate.

REFERENCES:
patent: Re28051 (1974-06-01), McDermott
patent: 4264288 (1981-04-01), Wusthof et al.
patent: 4380420 (1983-04-01), Wusthof et al.
patent: 4462773 (1984-07-01), Erasov et al.
patent: 4484870 (1984-11-01), Erasov

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