Title:
斜板式可変容量型ピストンポンプ
Document Type and Number:
Japanese Patent JP5662241
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a swash plate type variable capacity piston pump that can achieve both improvement in lubricity of a slide of a convexly curved surface of a swash plate on a concavely curved surface of a swash plate reception member and prevention for stagnation of lubricating oil having deteriorated in the swash plate reception member while suppressing increase in size.SOLUTION: The swash plate type variable capacity piston pump includes a low-friction swash plate reception member 32 which is curved to form a concavely curved surface 32a and oil film formation means of forming an oil film of lubricating oil between the swash plate reception member 32 and a convexly curved surface 21 of a swash plate 11 by using lubricating oil filled in a casing 2, and the oil film formation means includes a hole 34 penetrating the swash plate reception member 32 in a direction crossing a circumferential direction of the concavely curved surface 32a of the swash plate reception member 32, and grooves 35, 36 as oil passages which are formed in a cradle member 22, and introduce the lubricating oil from outside the cradle member 22 and guide the lubricating oil to the hole 34 from the opposite side of the concavely curved surface 32a of the swash plate reception member 32.
Inventors:
岡崎 豊
Application Number:
JP2011109548A
Publication Date:
January 28, 2015
Filing Date:
May 16, 2011
Export Citation:
Assignee:
日立建機株式会社
International Classes:
F04B1/22
Attorney, Agent or Firm:
Patent business corporation Takekazu international patent firm