JPS59169404U - Cylinder hydraulic circuit - Google Patents

Cylinder hydraulic circuit

Info

Publication number
JPS59169404U
JPS59169404U JP6283383U JP6283383U JPS59169404U JP S59169404 U JPS59169404 U JP S59169404U JP 6283383 U JP6283383 U JP 6283383U JP 6283383 U JP6283383 U JP 6283383U JP S59169404 U JPS59169404 U JP S59169404U
Authority
JP
Japan
Prior art keywords
oil passage
side oil
piston
cylinder
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6283383U
Other languages
Japanese (ja)
Inventor
野坂　寛
長浜　利夫
Original Assignee
新キャタピラ−三菱株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新キャタピラ−三菱株式会社 filed Critical 新キャタピラ−三菱株式会社
Priority to JP6283383U priority Critical patent/JPS59169404U/en
Publication of JPS59169404U publication Critical patent/JPS59169404U/en
Pending legal-status Critical Current

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  • Fluid-Pressure Circuits (AREA)

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は油圧パワーショベルを示す側面図、第２図は本
案に係るシリンダの油圧回路の一実施例を示す油圧回路
図である。 １１・・・シリンダ、１２・・・ピストン、１３・・・
ロッド、１５・・・コントロール弁、１６．１７・・・
リモートコントロール弁、１８２．１９−・・スローリ
ターン弁、２０．２１・・・ポンプ過負荷防止用リリー
フ弁、２２．２３・・・パイロットチェック弁、２４．
２５・・・シリンダ保護用り゛リーフ弁、ａ・・・ピス
トン側油路、ａｌ・・・一方のパイロット油路、ｂ・・
・ロッド側油路、ｂ□・・・他方のパイロット油路。FIG. 1 is a side view showing a hydraulic power shovel, and FIG. 2 is a hydraulic circuit diagram showing an embodiment of the hydraulic circuit of a cylinder according to the present invention. 11...Cylinder, 12...Piston, 13...
Rod, 15...Control valve, 16.17...
Remote control valve, 182.19-...Slow return valve, 20.21...Relief valve for pump overload prevention, 22.23...Pilot check valve, 24.
25... Cylinder protection leaf valve, a... Piston side oil passage, al... One pilot oil passage, b...
・Rod side oil passage, b□...Other pilot oil passage.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一対のリモートコントロール弁からの制御圧力により切
換えられるコントロール弁と、同コントロール弁とシリ
ンダのピストン側とを接続するピストン側油路及び同コ
ントロール弁とシリンダのロンド側とを接続するロッド
側油路のそれぞれに設けたスローリターン弁と、同各ス
ローリターン弁と同コントロール弁との間のピストン側
油路及びロッド側油路のそれぞれに設けたポンプ過負荷
防止用リリーフ弁とを有するシリンダの油圧回路におい
て、前記各スローリターン弁と前記シリンダとの間の前
記ピストン側油路及び前記ロッド側油路のそれぞれにパ
イロットチェック弁を設けるとともに同各パイロットチ
ェック弁と前記シリンダとの間の前記ピストン側油路及
び前記ロッド側油路のそれぞれにシリンダ保護用リリー
フ弁を設け、前記ピストン側油路のコントロール弁側と
前記ロッド側油路のパイロットチェック弁とを一方のパ
イロット油路により、前記ロッド側油路のコントロール
弁側と前記ピストン側油路のパイロットチェック弁とを
他方のパイロット油路により、それぞれ接続したことを
特徴とするシリンダの油圧回路。A control valve that is switched by control pressure from a pair of remote control valves, a piston-side oil passage that connects the control valve and the piston side of the cylinder, and a rod-side oil passage that connects the control valve and the cylinder side. A hydraulic circuit for a cylinder having a slow return valve provided in each of the slow return valves, and a pump overload prevention relief valve provided in each of the piston side oil passage and the rod side oil passage between the slow return valve and the control valve. A pilot check valve is provided in each of the piston side oil passage and the rod side oil passage between each of the slow return valves and the cylinder, and the piston side oil passage between each of the pilot check valves and the cylinder is provided with a pilot check valve. A cylinder protection relief valve is provided in each of the piston-side oil passage and the rod-side oil passage, and one pilot oil passage connects the control valve side of the piston-side oil passage and the pilot check valve of the rod-side oil passage. A hydraulic circuit for a cylinder, characterized in that the control valve side of the piston side oil passage and the pilot check valve of the piston side oil passage are connected by the other pilot oil passage.
JP6283383U 1983-04-28 1983-04-28 Cylinder hydraulic circuit Pending JPS59169404U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6283383U JPS59169404U (en) 1983-04-28 1983-04-28 Cylinder hydraulic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6283383U JPS59169404U (en) 1983-04-28 1983-04-28 Cylinder hydraulic circuit

Publications (1)

Publication Number Publication Date
JPS59169404U true JPS59169404U (en) 1984-11-13

Family

ID=30193018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6283383U Pending JPS59169404U (en) 1983-04-28 1983-04-28 Cylinder hydraulic circuit

Country Status (1)

Country Link
JP (1) JPS59169404U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01139101U (en) * 1988-03-16 1989-09-22

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS507322A (en) * 1973-05-22 1975-01-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS507322A (en) * 1973-05-22 1975-01-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01139101U (en) * 1988-03-16 1989-09-22

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