Title:
SWASH PLATE TYPE FLUID PRESSURE ROTATING MACHINE
Document Type and Number:
Japanese Patent JP2023084603
Kind Code:
A
Abstract:
To reduce a machine loss caused by the shearing of oil without increasing a leakage flow rate from slide faces of cylinder holes with respect to pistons.SOLUTION: Notches 23 are formed at slide faces between a plurality of cylinder holes 6 and a plurality of pistons 8, and since cross sections of the notches 23 in thickness directions are formed so as to face an oil film portion which is formed into a reverse wedge form in progress directions of the pistons 8 in a discharge stroke out of an oil film between the slide faces of the cylinder holes 6 and the pistons 8, tips of the notches are formed in a region of the slide faces of the cylinder holes 6 which is the nearest a rotation center of a cylinder block 5 in a radial direction of the cylinder block 5. Also, it is preferable that the notches 23 are formed in regions from zero-degree angle up to 180-degree angle of the cylinder holes 6, and from 270-degree angle up to 360-degree angle, more preferably, from zero-degree angle up to 170-degree angle, and from 310-degree angle up to 360-degree angle.SELECTED DRAWING: Figure 15
Inventors:
SUZUKI KENTA
SUZUKI MOTOJI
FUJIMOTO TAKASHI
YOSHIDA TOMOHIRO
SUZUKI MOTOJI
FUJIMOTO TAKASHI
YOSHIDA TOMOHIRO
Application Number:
JP2021198895A
Publication Date:
June 19, 2023
Filing Date:
December 07, 2021
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F04B1/22; F04B1/143
Attorney, Agent or Firm:
Patent Attorney Corporation Kaichi
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