JPS5875969U

JPS5875969U - Radial piston type pump/motor

Info

Publication number: JPS5875969U
Application number: JP17177981U
Authority: JP
Inventors: 一正湯浅
Original assignee: 日立建機株式会社
Priority date: 1981-11-18
Filing date: 1981-11-18
Publication date: 1983-05-23

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来技術によるラジアルピストン型ポンプ・モ
ータの部分縦断面図、第２図は第１図中の滑りシューの
摺動面側平面図、第３図ないし第６図は本考案に係るラ
ジアルピストン型ポンプ・モータを示し、第３図は第１
図と同様の縦断面図、第４図は第３図中のＩＶ−ＩＶ矢
示方向断面図、第５図は滑りシューの摺動面側平面図、
第６図イ２口。ハ、二はそれぞれ異なる作動状態を示す第４図中のＶＩ
−ＶＩ矢示方向断面図である。１・・・・・・カムリング、ＩＡ・・・・・・カム面、
２・・・・・・シリンダブロック、３・・・・・・シリ
ンダ、４・・聞ピストン、２１・・・・・・滑りシュー
　２１Ｂ・・・・・・摺動面部、２２Ａ、２２Ｂ、２３
Ａ、２３Ｂ・・・・・・静圧ポケット、２４・・・・・
・圧力制御室、２５Ａ、２５Ｂ、２６Ａ。２６Ｂ・・・・・・絞り穴、２７・・・・・・導通穴、
２８・曲・ピン８０８１Fig. 1 is a partial vertical sectional view of a radial piston type pump/motor according to the prior art, Fig. 2 is a plan view of the sliding surface side of the sliding shoe in Fig. 1, and Figs. 3 to 6 are according to the present invention. A radial piston type pump/motor is shown, and Fig. 3 shows the 1st
4 is a sectional view in the direction of the IV-IV arrow in FIG. 3; FIG. 5 is a plan view of the sliding surface of the sliding shoe;
Figure 6 A 2 mouths. VI in Fig. 4 shows different operating states.
-VI is a cross-sectional view in the direction of the arrow. 1...Cam ring, IA...cam surface,
2...Cylinder block, 3...Cylinder, 4...Piston, 21...Sliding shoe 21B...Sliding surface portion, 22A, 22B, 23
A, 23B... Static pressure pocket, 24...
・Pressure control chamber, 25A, 25B, 26A. 26B... Throttle hole, 27... Continuity hole,
28・Song・Pin 80 81

Claims

[Scope of utility model registration request]

A cylinder block that rotates eccentrically with respect to the cam ring is provided in the cam ring, a plurality of cylinders are radially bored in the cylinder block, a piston is slidably provided in each cylinder, and the piston and the In a radial piston type pump motor, a sliding shoe is provided between the cam rings, one end of which is swingably connected to the piston, and the other end of which slides on the cam surface of the cam ring.
The sliding surface of the sliding shoe relative to the cam ring is provided with static pressure pockets on the front and rear and left and right sides in the sliding direction, and within the sliding shoe is a pressure control chamber and a conductor that communicates the pressure control chamber with the cylinder. and a throttle hole that communicates each of the static pressure pockets with the pressure control chamber, and the pressure in the pressure control chamber decreases when the pressure in any one of the static pressure pockets decreases. A radial piston type pump motor characterized by housing a pin that closes a throttle hole communicating with the static pressure pocket.