JPS59160905U

JPS59160905U - hydraulic cylinder device

Info

Publication number: JPS59160905U
Application number: JP5516083U
Authority: JP
Inventors: 越智　勝彦; 浅田　忠敬; 山川　政志
Original assignee: 日立造船株式会社
Priority date: 1983-04-12
Filing date: 1983-04-12
Publication date: 1984-10-27

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図は従来の油圧シリンダ装置の油圧系統図、第２図
及び第３図はそれぞれ従来の油圧シリンダ装置における
流量制御機構の具体例を示す断面図、　・第４図は本考
案の一実施例における油圧シリンダ装置の油圧系統図、
第５図は同油圧シリンダ装置の断面図、第６図は同油圧
シリンダ装置の上昇動作の説明図、第７図は同油圧シリ
ンダ装置におけるピストンの受圧面積の説明図、第８図
は同油圧シリンダ装置の上昇動作時及び下降動作時にお
けるオイルクッションがきき始める状態の説明図である
。２１・・・内ピストン、２２．２３・・・外ピストン、
２４・・・シリンダ、２５．２６・・・カバー、２５ａ
。２６ａ・・・クッション用凹部、２８・・・ピストンロ
ッド、Ａ、Ｂ・・・ポート。（ニ）　　　　　　　　　　θす６　　　　　　　　６− ／　　　　　　　　　　　１第５図 ’　　　　　　　　２’５　２５；１　２２ａ＝／ＬＪ
″７・Fig. 1 is a hydraulic system diagram of a conventional hydraulic cylinder device, Figs. 2 and 3 are sectional views showing specific examples of a flow control mechanism in a conventional hydraulic cylinder device, and Fig. 4 is an implementation of the present invention. Hydraulic system diagram of hydraulic cylinder device in example,
Fig. 5 is a sectional view of the hydraulic cylinder device, Fig. 6 is an explanatory diagram of the lifting operation of the hydraulic cylinder device, Fig. 7 is an explanatory diagram of the pressure receiving area of the piston in the hydraulic cylinder device, and Fig. 8 is the hydraulic pressure FIG. 6 is an explanatory diagram of a state in which the oil cushion starts to be generated during the ascending operation and descending operation of the cylinder device. 21...Inner piston, 22.23...Outer piston,
24...Cylinder, 25.26...Cover, 25a
. 26a... Cushion recess, 28... Piston rod, A, B... Port. (d) θS6 6- / 1 Figure 5'2'525; 1 22a=/LJ
″7・

Claims

[Scope of utility model registration request]

(1) Move inside the first space formed by a cylindrical cylinder and a cover that closes both ends of this cylinder.
A hollow outer piston that can move backwards and this outer screw
The outer piston is provided with an inner piston that can reciprocate within a second space surrounded by a ton and is connected to a piston rod, and a port for supplying and discharging pressure oil to the first space. , an opening communicating the first space and the second space is formed in both end walls, and an orifice consisting of a small hole extending from this opening to the outer circumferential surface of the outer piston is formed, and a small orifice is formed at both ends of the outer piston. A hydraulic cylinder device, characterized in that a small diameter portion is formed in the cover, and a cushioning recess is formed in the cover into which the small diameter portions at both ends of the front and outer pistons can fit.