Title:
HYDRAULIC ROTARY MACHINE
Document Type and Number:
Japanese Patent JP2019120155
Kind Code:
A
Abstract:
To correct an inclination of a cylinder block with respect to a rotation center axis line of a rotary shaft.SOLUTION: A hydraulic pump 1 comprises: a casing 2; a rotary shaft 5 rotatably provided in the case 2; a cylinder block 8 having an insertion hole 8C in which the rotary shaft 5 is inserted so that the cylinder block is rotatable integrally with the rotary shaft 5, and having a plurality of cylinders 9; a plurality of pistons 10 which are reciprocatively inserted into the cylinders 9 of the cylinder block 8; and a valve plate 17 having feed/discharge ports 17A, 17B causing the cylinders 9 of the cylinder block 8 to communicate with the outside. A posture holding cylinder member 28 is provided between an outer circumferential surface of an intermediate shaft part 5D of the rotary shaft 5 and an inner circumferential surface of a large-diameter hole part 8E of the cylinder block 8. The posture holding cylinder member 28 corrects an inclination of the cylinder block 8 with respect to a rotation center axis line O-O of the rotary shaft 5 and cause the rotation center axis line O-O of the rotary shaft 5 and a rotation center axis line of the cylinder block 8 to match with each other.SELECTED DRAWING: Figure 2
Inventors:
BABA YUYA
Application Number:
JP2017253936A
Publication Date:
July 22, 2019
Filing Date:
December 28, 2017
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F04B1/22; F03C1/253; F04B53/00; F04B53/16; F04B53/22
Domestic Patent References:
| JPS56110582A | 1981-09-01 | |||
| JPS54177602U | 1979-12-15 | |||
| JPH10331759A | 1998-12-15 |
Foreign References:
| US20160131116A1 | 2016-05-12 |
Attorney, Agent or Firm:
Hirowa Patent Office