Swash plate type axial piston pump including lubrication mechani

Details Swash plate type axial piston pump including lubrication mechani Swash plate type axial piston pump including lubrication mechani

1997-02-24

1998-07-28

Denion, Thomas E.

Lubrication

Systems

Cylinders parallel to shaft

92 57, 92154, 417269, F01M 100

Patent

active

057851506

ABSTRACT:
In a swash plate type axial piston pump, a swash plate 23 is fixed and supported in a cabinet while being inclined with respect to the center axial line of a rotary shaft 3. A cylinder block 15 having a plurality of cylinders 13 is attached to the rotary shaft 3 so that the cylinder block 15 slides of the rotary shaft 3 in the axial direction thereof and is rotated integrally therewith. Each one end of a plurality of pistons 21 is slidingly engaged with the cylinder 13 and the other end thereof is abutted against the swash plate 23 through a shoe 25. A valve plate 31 having a suction port 33 and a discharge port 35 is disposed so as to be abutted against the inner surface of the cabinet 1 and the bottom the cylinder block 15 so that a suction path 39 and a discharge path 41 in the cabinet 1 are selectively communicated with a pump chamber 14 in each cylinder through the suction port 33 and the discharge port 35. An operating oil is supplied to the sliding portion between the valve plate 31 and the bottom of the cylinder block 15 by a lubrication means. With this arrangement, since the operating oil is positively supplied to the sliding portion being rotated of the swash plate type axial piston pump, the sliding portion is sufficiently lubricated even if the pump is started to thereby prevent the dry state of the pump.

REFERENCES:
patent: 3037489 (1962-06-01), Douglas
patent: 3131605 (1964-05-01), LaBorde
patent: 4014250 (1977-03-01), Bosch
patent: 5205124 (1993-04-01), Budzich

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