JPS58125702U

JPS58125702U - Double acting hydraulic cylinder

Info

Publication number: JPS58125702U
Application number: JP2249582U
Authority: JP
Inventors: 和彦矢野; 正久河村; 源吉井
Original assignee: 株式会社神崎高級工機製作所
Priority date: 1982-02-18
Filing date: 1982-02-18
Publication date: 1983-08-26

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図はこの考案の一実施例を装備した田植機要部の概
略側面図、第２図はほぼ、第１図の■−■線に沿う拡大
横断平面図、第３図は第２図に図示部分の要部を第２図
とは異なった状態で図示した横断平面図である。６・・・油圧昇降装置、７・・・複動型油圧シリンダ、
８・・・ピストンロンド部、２２−・・ピストン部、２
３・・・伸長作用油室、２４・・・縮小作用油室、２５
・・・油通路、２６・・・アンロードバルブ、２７・・
・シート面、２８・・・スプリング、２９・・・油通路
穴、３０・・・オーバロードリリーフバルブ、３１・・
・油通路穴、３２・・・シート面、３３・・・スプリン
グ。Fig. 1 is a schematic side view of the main parts of a rice transplanter equipped with an embodiment of this invention, Fig. 2 is an enlarged cross-sectional plan view taken approximately along the line ■-■ in Fig. 1, and Fig. 3 is the same as Fig. 2. FIG. 2 is a cross-sectional plan view showing the main parts of the portion shown in FIG. 2 in a different state from that in FIG. 2; 6...Hydraulic lifting device, 7...Double acting hydraulic cylinder,
8...Piston rond part, 22-...Piston part, 2
3... Extension oil chamber, 24... Reduction oil chamber, 25
...Oil passage, 26...Unload valve, 27...
・Seat surface, 28... Spring, 29... Oil passage hole, 30... Overload relief valve, 31...
・Oil passage hole, 32...Seat surface, 33...Spring.

Claims

[Scope of utility model registration request]

The two sleeve chambers 23 and 24 of the double-acting hydraulic cylinder 7 are arranged in an oil passage 25 formed in the piston rod 8°22 so as to connect the two sleeve chambers 23 and 24. In a double-acting hydraulic cylinder 7 equipped with an unload valve 26 configured as a check valve that allows oil flow only from the first oil chamber 24 to the second oil chamber 23, the unload valve 26 through the oil passage 25 to the both sleeve chambers 23.
．． An oil passage hole 31 is provided to communicate between the second oil chamber 23 and the second oil chamber 23, and when a surge pressure is generated in the second oil chamber 23, a relief operation is performed to remove hydraulic pressure from the second oil chamber 23 to the first oil chamber 24. The overload relief valve 30 is
0 seat surface 32 is formed on the unload valve 26 at the end of the oil passage hole 31, and the piston rod 8
A double-acting hydraulic cylinder characterized by being installed within ゜22.