JPS5822503U

JPS5822503U - hydraulic cylinder

Info

Publication number: JPS5822503U
Application number: JP11713381U
Authority: JP
Inventors: 邦彦吉田
Original assignee: 日立建機株式会社
Priority date: 1981-08-06
Filing date: 1981-08-06
Publication date: 1983-02-12

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 the drawing]

第１図は従来技術による油圧シリンダを示す縦断面図、
゛第２図は本考案に係る油圧シリンダを示す縦断面図、
第３図は第２図によるシリンダ及びダンパシリンダの拡
大縦断面図である。１・・・シリンダ、２・・・ヘッドカバー、３・・・ロ
ッドカバー、８・・・ロッド、９・・・ピストン、２１
Ａ。２１Ｂ・・・ダンパシリンダ、２２Ａ、２２Ｂ・・・間
隙、２３Ａ、２３Ｂ・・・ダンピストン、２４Ａ、２４
Ｂ・・・突出部、２５Ａ、２５Ｂ・・・ダンパ室、２６
Ａ。２６Ｂ・・・油室、２７Ａ、２７Ｂ・・・逆止弁。FIG. 1 is a longitudinal sectional view showing a hydraulic cylinder according to the prior art;
゛Figure 2 is a longitudinal sectional view showing the hydraulic cylinder according to the present invention;
3 is an enlarged longitudinal sectional view of the cylinder and damper cylinder according to FIG. 2; FIG. 1... Cylinder, 2... Head cover, 3... Rod cover, 8... Rod, 9... Piston, 21
A. 21B... Damper cylinder, 22A, 22B... Gap, 23A, 23B... Dam piston, 24A, 24
B... Protrusion, 25A, 25B... Damper chamber, 26
A. 26B...Oil chamber, 27A, 27B...Check valve.

Claims

[Scope of utility model registration request]

Cylinder covers for covering the cylinder are provided on both end surfaces of the cylinder, and a piston is slidably provided in the cylinder to define two oil chambers inside the cylinder. In a hydraulic cylinder, a damper cylinder is provided on at least one end surface of the piston and is parallel to the axis of the piston, and a microscopic cylinder is provided between the damper cylinder and the damper cylinder. a damper piston is slidably provided with a gap therebetween, the damper piston 7&; is provided with a protrusion that protrudes beyond the end surface of the piston, and a damper chamber is formed between the damper cylinder and the damper piston; The damper piston is provided with an oil chamber that communicates the damper chamber with an oil chamber defined by the piston, and a check valve is provided in the middle of the oil chamber to allow oil to flow only to the damper chamber. 1. A hydraulic cylinder, characterized in that the protruding portion is configured to provide a cushioning effect due to the flow resistance of the oil flowing through the gap when the protrusion comes into contact with the cylinder cover.