JPS58132202U

JPS58132202U - Double acting hydraulic cylinder

Info

Publication number: JPS58132202U
Application number: JP2939782U
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: 1982-03-01
Filing date: 1982-03-01
Publication date: 1983-09-06
Also published as: JPS6220733Y2

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図はこの考案の第１の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ｎ−ｎ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、第４図及
び第５図はそれぞれ、この考案の第２の実施例の一部を
互に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・・・・・・ピストンロッド部、２２・
・・・・・ピストン部、２３・・・・・・伸長作用油室
、２４・・・・・・縮小作用油室、２５・・・・・・油
通路、２５ｂ・・・・・・環状段部、２６・・・・・・
アンロードバルブ、２６ａ・・・・・・油通路穴、２７
・・・・・・オーバロードリリーフバルブ、２７ａ・・
・・・・ロッド部、２７ｂ・・・・・・穿孔ばね受板、
２７Ｃ・・・・・・油通路穴、２８・・・・・・ばね受
環体、２８ｂ・・・・・・規制ロッド部、２９・・・・
・・スプリング、３０・・・・・・スプリング、３２・
・・・・・シート面、３３・・・・・・シート面、５０
・・・・・・規制環体。ｔ、　　　声Fig. 1 is a schematic side view of the main parts of a rice transplanter equipped with the first embodiment of this invention, Fig. 2 is an enlarged cross-sectional plan view taken approximately along line nn in Fig. 1, and Fig. FIG. 2 is a cross-sectional plan view showing the main part of the illustrated part in a different state from FIG. 2, and FIGS. 4 and 5 each show a part of the second embodiment of this invention in a different state. FIG. 6...Hydraulic lifting device, 7...Double acting hydraulic cylinder, 8...Piston rod section, 22...
... Piston part, 23 ... Extension oil chamber, 24 ... Reduction oil chamber, 25 ... Oil passage, 25b ... Annular Step part, 26...
Unload valve, 26a...Oil passage hole, 27
...Overload relief valve, 27a...
...Rod part, 27b...Perforated spring receiving plate,
27C... Oil passage hole, 28... Spring receiving ring body, 28b... Regulation rod part, 29...
... Spring, 30 ... Spring, 32.
... Seat surface, 33 ... Seat surface, 50
...Regulatory environment. t, voice

Claims

[Scope of utility model registration request]

It is arranged in an oil passage 25 formed in the piston/piston rod 8° 22 so as to connect both the oil chambers 23 and 24 of the double-acting hydraulic cylinder 7, In a double-acting hydraulic cylinder 7 equipped with an unload valve 26 configured as a check valve that allows oil to flow only from the first oil chamber 24 to the second oil chamber 23, the second oil An overload relief valve 27 that performs a relief operation when surge pressure is generated in the chamber 23 to remove hydraulic pressure from the second oil chamber 23 to the first oil chamber 24 is connected to the overload relief valve 27 to perform the unloading operation. The double-acting double-acting device is characterized in that the seat surface 32 of the valve 26 is formed, and the seat surface 33 of the overload relief valve 27 is formed on the unload valve 27, and is provided in the piston-piston condo 8.22. type hydraulic cylinder.