Title:
RADIAL PISTON-TYPE HYDRAULIC ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2019/215850
Kind Code:
A1
Abstract:
In the present invention, a pintle switching valve shaft is discarded and a valve plate is employed to improve volumetric efficiency, and a rotary shaft that passes through a pump housing is provided to enable multiple connections between rotary shafts. This radial hydraulic actuator A comprises: a rotary shaft 1 that passes through a pump housing H; a cylinder block 30 which is accommodated in an accommodation part 10a of the pump housing H, rotates together with the rotary shaft 1, and is capable of sliding in the axial direction thereof; a suction port 11 and a discharge port 12 which are provided on the pump housing H; a valve plate 40 provided between the cylinder block 30 and the accommodation part 10a; a spring 27 that presses the cylinder block 30 against the valve plate 40; a sliding ring 60 that is disposed so as to be capable of moving eccentrically with respect to the cylinder block 30, and with which a piston shoe 70 of a piston 50 inserted into a cylinder bore 33 comes into sliding contact; and an eccentric drive part 80 that eccentrically moves the sliding ring 60.
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Inventors:
KUBO TOMIO (JP)
SHIGETOMO TAKURO (JP)
OKAMURA TADASHI (JP)
SHIGETOMO TAKURO (JP)
OKAMURA TADASHI (JP)
Application Number:
PCT/JP2018/017975
Publication Date:
November 14, 2019
Filing Date:
May 09, 2018
Export Citation:
Assignee:
RAPIIT CO LTD (JP)
International Classes:
F04B1/04
Foreign References:
| JPS57168069A | 1982-10-16 | |||
| JP2004176601A | 2004-06-24 | |||
| JPS6073884U | 1985-05-24 | |||
| JP2009121312A | 2009-06-04 | |||
| JPH11241689A | 1999-09-07 | |||
| JPH07238884A | 1995-09-12 | |||
| JPS568871U | 1981-01-26 | |||
| JPS55144870U | 1980-10-17 | |||
| JPS57171085A | 1982-10-21 | |||
| DE4123675A1 | 1993-01-21 | |||
| US3614265A | 1971-10-19 |
Attorney, Agent or Firm:
MORI Yoshiaki et al. (JP)
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