Gerotor motor and parking lock assembly therefor

Details Gerotor motor and parking lock assembly therefor Gerotor motor and parking lock assembly therefor

1997-10-24

2000-05-16

Nguyen, Hoang

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

418181, F01C 102

Patent

active

060628359

ABSTRACT:
A fluid pressure motor of the type including a gerotor gear set (15) including a star member (31) which orbits and rotates. The motor includes valving (41) which is disposed forwardly of the gerotor gear set, and an end cap assembly (21;111) disposed rearwardly of the gerotor gear set. The star member (31) defines a central opening (89;127) at the rearward end thereof, which may be defined by a separate insert member (125). Within the end cap assembly (21;111) is a lock piston (75;133) biased by a pair of Belleville washers (85,87;121) toward an engaged position (FIG. 1; FIG. 4) in which a lock portion (79) has its beveled portion (91;135) in engagement with the central opening (89;127) of the star (31), thus preventing any further orbital motion of the star, and serving as a parking lock. The lock piston (75;133) and end cap assembly (21;111) define a pressure chamber (99;119) which may be pressurized by an external signal (95) to move the lock piston to its disengaged position (FIG. 2) in which the beveled portion (91;135) is out of engagement with the central opening (89;127), and the star member (31) is permitted to orbit and rotate in the normal manner.

REFERENCES:
patent: 3087436 (1963-04-01), Dettlof et al.
patent: 3616882 (1971-11-01), White
patent: 3960470 (1976-06-01), Kinder
patent: 4493404 (1985-01-01), Wenker
patent: 4597476 (1986-07-01), Wenker
patent: 4613292 (1986-09-01), Bernstrom et al.
patent: 4981423 (1991-01-01), Bissonnette
patent: 5114324 (1992-05-01), Spindeldreher

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