Hydraulic pump rotating group axial alignment structure

Details Hydraulic pump rotating group axial alignment structure Hydraulic pump rotating group axial alignment structure

1981-06-08

1983-12-06

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

418135, 291564R, 403 14, F04C 200, F04C 1500

Patent

active

044190581

ABSTRACT:
A vane type hydraulic pump has a pressure plate, thrust plate, cam ring, rotor and vanes, which when assembled, are denoted as the pump rotating group. The thrust plate, pressure plate and cam ring are maintained in axial and angular alignment by a pair of dowel pins which extend between the plates and through the cam ring with a close fit relationship. The plates and cam ring are restrained from rotation by a dowel pin which extends between a close fit in the pump housing and a loose fit in the pressure plate. The rotating group is disposed in a cylindrical cavity in the pump housing which cavity has a diametral dimension cooperating with the outer diameter of the pressure plate and thrust plate to provide a sliding pilot fit at assembly thereby sharing the axial alignment constraint of the pair of dowel pins.

REFERENCES:
patent: T927009 (1974-10-01), Ulrich
patent: 3198127 (1965-08-01), Brundage
patent: 3207077 (1965-09-01), Zeigler et al.
patent: 3334591 (1967-08-01), Dymond
patent: 3421413 (1969-01-01), Adams et al.
patent: 3491699 (1970-01-01), Yowell
patent: 3632238 (1972-01-01), Searle
patent: 3827834 (1974-08-01), Kakimoto

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