Swash-plate type piston pump motor

Details Swash-plate type piston pump motor Swash-plate type piston pump motor

1990-08-10

1991-04-30

Smith, Leonard E.

Pumps

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

74 60, 91499, 92 71, 92 57, F04B 110, F04B 112, F04B 120

Patent

active

050113771

ABSTRACT:
A swash-plate type piston pump motor has a housing assembly comprising: an end plate for rotatably supporting a cylinder rotor against thrust loads in its axial direction and also rotatably supporting the upper end of an output shaft; a cylinder side peripheral wall encompassing the cylinder rotor; an inner peripheral wall which is joined contiguously to the cylinder side peripheral wall and extends downward toward the lower end of the output shaft. The inner peripheral wall encloses and supports a swash plate in an inclined state. A downwardly extending outer peripheral wall is also joined contiguously to the cylinder side peripheral wall and is flared outward toward the lower end of the output shaft, an annular space being formed between the inner and outer peripheral walls. The maximum flare angle of the outer peripheral wall relative to the axial direction of the output shaft is 30 degrees. The outer peripheral wall has at its open flare extremity a motor mounting flange. The rigidity of the outer peripheral wall is thereby increased, and generation of vibrations and noise therefrom is effectively prevented. The outer peripheral wall also functions as a shield to contain and suppress noise generated at the outer surface of the inner peripheral wall.

REFERENCES:
patent: 3277835 (1966-10-01), Wahlmark
patent: 3978772 (1976-09-01), Miyao
patent: 4602554 (1986-07-01), Wagenseil
patent: 4611529 (1986-09-01), Stricker
patent: 4620475 (1986-11-01), Watts

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