Speed change mechanism for swash plate type hydraulic motor

Details Speed change mechanism for swash plate type hydraulic motor Speed change mechanism for swash plate type hydraulic motor

1994-12-30

1997-11-18

Gluck, Richard E.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

4172221, F01B 1304

Patent

active

056876319

ABSTRACT:
A two-stage speed change mechanism for a swash plate hydraulic motor, in which a swash plate is moved even during the revolution of the swash type hydraulic motor, thereby making it possible to vary the exclusion volume. An accommodating bore for accommodating a fixing pin is formed on a side wall of a housing. Piston for shifting the swash plate is provided, and control valves 14,15 and 16 each including a pilot line 14, a spool 15 and a compression spring 16 are installed for the actuation of the swash plate shifting piston 3. Thus the exclusion volume can be safely varied even during the rotating of the hydraulic motor.

REFERENCES:
patent: 3130817 (1964-04-01), Wahlmark
patent: 3339660 (1967-09-01), Budzich
patent: 3784327 (1974-01-01), Lonnemo
patent: 4825753 (1989-05-01), Inoue et al.
patent: 4958989 (1990-09-01), Frantz
patent: 5183393 (1993-02-01), Schaffner
patent: 5222870 (1993-06-01), Budzich
patent: 5320499 (1994-06-01), Hamey et al.

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