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Patent Searching and Data


Title:
HYDRAULIC ROTARY MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/169552
Kind Code:
A1
Abstract:
Provided is a hydraulic rotary machine configured so as to reduce the sliding resistance of a reciprocating piston and so as to suppress a reduction in volumetric efficiency corresponding to the amount of leakage of hydraulic oil. A piston pump (1) is provided with a rotating shaft (11), a cylinder block (12), a piston head (13), a piston rod (14), a retainer (15), a swash plate (16), and a tilt regulation mechanism (17). When the tilt regulation mechanism (17) rocks the swash plate (16), the amount of discharge from the piston pump (1) is variably changed. The retainer (15) which rotates with both the piston head (13) and the piston rod (14) is supported by a retainer bush (11A) provided to the rotating shaft (11). The retainer sphere section (15A) of the retainer (15) and the retainer bush sphere section (11B) of the retainer bush (11A) have spherical shapes having the same curvature. During the regulation of tilt, the retainer (15) rocks while the retainer bush sphere section (11B) is in sliding contact with the retainer bush (11A).

Inventors:
MAEKAWA, Satoshi
SUGANO, Naoki
MORITA, Kei
Application Number:
JP2017/008898
Publication Date:
October 05, 2017
Filing Date:
March 07, 2017
Export Citation:
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Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) (2-4 Wakinohama-Kaigandori 2-chome, Chuo-ku Kobe-sh, Hyogo 85, 〒6518585, JP)
International Classes:
F04B1/22; F03C1/253
Foreign References:
JP2009250204A2009-10-29
JP2003113776A2003-04-18
JPS57105574A1982-07-01
JPS4980602A1974-08-03
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (Osaka Nakanoshima Building 2nd Floor, 2-2 Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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