VARIABLE CAPACITANCE, OBLIQUE SPINDLE TYPE HYDRAULIQUE MACHINE

Title:

VARIABLE CAPACITANCE, OBLIQUE SPINDLE TYPE HYDRAULIQUE MACHINE

Document Type and Number:

WIPO Patent Application WO/1990/004101

Kind Code:

A1

Abstract:

This invention relates to a variable capacitance, oblique spindle type hydraulic machine which supports the reaction of oil pressure acting on a cylinder block (8) by a radial static pressure bearing (23) or by a thrust static pressure bearing (28). This hydraulic machine delivers a high pressure oil in accordance with an angle of inclination of a cylinder block (8) by variable throttle means (34, 37, 51, 54) or control valves (77, 78). The high pressure oil thus delivered is supplied to the radial static pressure bearing (23) or to the thrust static pressure bearing (28). Accordingly, static pressure support capacity is exhibited in accordance with the angle of inclination of the cylinder block (8), a spindle can be supported stably and a leakage flow rate can be minimized.

Inventors:

AKASAKA YOSHIMICHI (JP)
NAKAMURA ICHIRO (JP)
GOTOH YASUHARU (JP)

Application Number:

PCT/JP1989/001007

Publication Date:

April 19, 1990

Filing Date:

October 02, 1989

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACHINERY (JP)

International Classes:

F03C1/253; F03C1/26; F03C1/06; F03C1/38; F04B1/20; F04B1/24; F16C32/06; F16H39/14; (IPC1-7): F03C1/06; F04B1/24

Foreign References:

JPS59213953A	1984-12-03
JPS62121873A	1987-06-03
JPS59131776A	1984-07-28

Other References: