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Patent Searching and Data


Title:
SWASH PLATE TYPE PUMP MOTOR
Document Type and Number:
Japanese Patent JP2006132464
Kind Code:
A
Abstract:

To provide a swash plate type pump motor capable of supplying lubricating oil to the vicinity of shoes without forming oil holes guiding lubricating oil to a rotational shaft.

This swash plate type pump motor is provided with cylinder blocks 3 which are rotatably stored in a casing 4 and through which cylinders 2 are bored; the rotational shaft 4 rotating the cylinder blocks 3; pitons 5 stored in the respective cylinders 2 reciprocatingly; the shoes 6 fitted into each end part of the pistons 5; and a swash plate 7 on which the shoes 6 are slid. The cylinder blocks 3 have engagement parts 11 engaged with the rotational shaft 4 and cylindrical holes 12 which are continued to the engagement parts 11 and in which part of the rotational shaft 4 is stored. Oil holes 16 communicated with the cylindrical holes 12 and opened in the vicinity of the shoes 6 are formed on the cylinder blocks 3. The three oil holes 3 are formed at even intervals along the circumferential directions of the cylinder blocks 3 and arranged in regions between the cylinders 2 and the engagement parts 11.


Inventors:
KOBAYASHI TAKESHI
YOSHIDA HIROBUMI
Application Number:
JP2004323816A
Publication Date:
May 25, 2006
Filing Date:
November 08, 2004
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F04B1/24; F03C1/253
Domestic Patent References:
JPH0552180A1993-03-02
JPS56138471A1981-10-29
JPS54163302U1979-11-15
Attorney, Agent or Firm:
Kenjiro Take
Ichiro Suzuki
Hirohiro Ichimura
Kazunori Satake