Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers
Patent
1979-07-25
1981-03-03
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Plural working members or chambers
418102, 180308, F03C 222, B60K 700
Patent
active
042538076
ABSTRACT:
A fluid pressure operated wheel motor is disclosed of the type including a stationary housing assembly (11) and a rotatable housing assembly (13), which includes a gerotor displacement mechanism (29). The gerotor ring (47) is part of the rotatable housing assembly and rotates, while the gerotor star (49) is connected by a dogbone shaft (57) to the stationary housing assembly and only orbits. The dogbone shaft defines an axial bore (67), and the stationary housing defines a pair of main fluid passages (71 and 73) which cooperate with a plurality of fluid passages (91 and 93) defined by the rotatable housing assembly to form commutating valving. In either direction of operation, the system fluid flows through the chamber (19) in which the dogbone is disposed. The system fluid is divided into two portions, with one portion flowing through one spline connection (59 and 63), and the other portion flowing through the axial bore and the other spline connection (61 and 65). The two portions then recombine and continue to flow through the motor. Flowing substantially all of the system fluid through the two spline connections greatly improves the lubrication of the splines, and substantially decreases the operating temperature thereof, thereby increasing the torque capacity of the motor.
REFERENCES:
patent: 3598509 (1971-08-01), Goff et al.
patent: 3601513 (1971-08-01), White, Jr.
patent: 3653454 (1972-04-01), Nielsen
patent: 3749195 (1973-07-01), Vegners
patent: 4035113 (1977-07-01), McDermott
Eaton Corporation
Kasper L.
McCloskey R. J.
Vrablik John J.
Yakimow J.
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