JPS58176888U - Crane work equipment hydraulic circuit - Google Patents
Crane work equipment hydraulic circuitInfo
- Publication number
- JPS58176888U JPS58176888U JP7266982U JP7266982U JPS58176888U JP S58176888 U JPS58176888 U JP S58176888U JP 7266982 U JP7266982 U JP 7266982U JP 7266982 U JP7266982 U JP 7266982U JP S58176888 U JPS58176888 U JP S58176888U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- switching valve
- conduit
- pressure
- hoisting
- 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
Links
Landscapes
- Jib Cranes (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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は伸縮ブームをそなえたクレーン作業機の一例を
示す側面図、第２図は第１図のクレーン作業機における
従来の油圧回路を示す系統図、第３図はこの考案による
クレーン作業機を示す側面図、第４図は第３図のＩＶ−
ＩＶ断面拡大図、第５図はこの考案による油圧回路の一
実施態様を示す系統図である。
１・・・・・・クレーン作業機本体、２・・・・・・巻
上用ウィンチ、３・・・・・・起伏シリンダ、４・・・
・・・伸縮ブーム、５・・・・・・伸縮シリンダ、７・
・・・・・油圧ポンプ、８・・・・・・油タンク、９・
・・・・・リリーフ弁、１０・・・・・・起伏シリンダ
操作用切替弁、１１・・・・・・伸縮シリンダ操作用切
替弁、１２・・・・・・油圧モータ操作用切替弁、１３
・・・・・・油圧モ・−タ、１４・・・・・・カウンタ
バランス弁、１５・・・・・・カウンタバランス弁、１
６・・・・・・カウンタバランス弁、１７・・・・・・
モーメント荷重検出用シリンダ、１７ａ・・・・・・圧
力取出し室、２０・・・・・・長穴、２１・・・・・・
巻上がわ管路、２２・・・・・・巻下がわ管路、２３・
・・・・・第一切替弁、２４・・・・・・管路、２５・
・・・・・パイロットチェック弁、２６・・・・・・パ
イロット管路、２７・・・・・・管路、２８・・・・・
・設定圧用ばね、２９・・・・・・管路、３０・・・・
・・第二切替弁、３１・・・・・・管路、３２・・・・
・・パイロットチェック方弁、３３・・・パイロット管
路、３４・・・・・・管路、３５・・・・・・管路、３
６・・・・・・設定圧用ばね、３７・・・・・・管路、
３８・・・・・・チェック弁。Fig. 1 is a side view showing an example of a crane working machine equipped with a telescopic boom, Fig. 2 is a system diagram showing a conventional hydraulic circuit in the crane working machine shown in Fig. 1, and Fig. 3 is a crane working machine according to this invention. FIG. 4 is a side view showing IV- in FIG. 3.
FIG. 5, an enlarged cross-sectional view of IV, is a system diagram showing one embodiment of the hydraulic circuit according to this invention. 1... Crane working machine body, 2... Hoisting winch, 3... Lifting cylinder, 4...
...Telescopic boom, 5...Telescopic cylinder, 7.
...Hydraulic pump, 8...Oil tank, 9.
... Relief valve, 10 ... Switching valve for operating the elevating cylinder, 11 ... Switching valve for operating the telescopic cylinder, 12 ... Switching valve for operating the hydraulic motor, 13
......Hydraulic motor, 14...Counter balance valve, 15...Counter balance valve, 1
6... Counter balance valve, 17...
Moment load detection cylinder, 17a...Pressure extraction chamber, 20...Elongated hole, 21...
Winding side pipe line, 22... Winding side side pipe line, 23.
...First switching valve, 24...Pipeline, 25.
...Pilot check valve, 26...Pilot line, 27...Pipe line, 28...
・Set pressure spring, 29... Conduit, 30...
...Second switching valve, 31...Pipe line, 32...
...Pilot check valve, 33...Pilot line, 34...Pipe line, 35...Pipe line, 3
6... Spring for setting pressure, 37... Pipe line,
38... Check valve.
Claims (1)
起伏させる起伏シリンダと、伸縮ブームを伸縮させる伸
縮シリンダとをそなえ、油圧モータの操作回路、起伏シ
リンダの前操作回路、伸縮シリンダの操作回路を、それ
ぞれ油圧モータ操作用切替弁、起伏シリンダ操作用切替
弁、伸縮シリンダ操作用切替弁を介して油圧ポンプの吐
出がわにつらね、前記各操作回路にはそれぞれカウンタ
バランス弁をそなえたクレーン作業機の油圧回路におい
て、下記（ａ）〜（ｆ）のように構成した油圧回路。 （ａ） 伸縮ブームの長さと吊り荷とで発生するモー
メント荷重を検出するモーメント荷重検出用シリンダを
クレーン作業機本体に設ける。 （ｂ） 油圧モータ操作切替弁と油圧モータ操作回路
のカウンタバランス弁との間の巻上がわ管路に、設定圧
を超えるとｉ路を閉じる第一切替弁を設ける。 （Ｃ） 第一切替弁の一方の受圧部は、モーメント荷
重検出用シリンダの圧力取出し室に管路によりつらねら
れ、その管路には油圧モータの巻上がわ管路の圧力で開
かれるパイロットチェンク弁が設けられている。第一切
替弁の他方の受圧部は油圧モータ操作回路の巻上がわ管
路につらねられており、カリ、同受戻部には設定圧用ば
ねが設けられている。 （ｄ） 伸縮シリンダ操作用切替弁と伸縮シリンダ操
作回路のカウンタバランス弁との間に、設定圧を超える
と管路を閉じる第二切荷弁を設ける。 （ｅ） 第二切替弁の一方の受圧部材は、モーメント
荷重検出用シリンダの圧力取出し室に管路によりつらね
られ、その管路には伸縮シリンダ操作回路の伸長がわ管
路の圧力で開かれるパイットチェック弁が設けられる。 第二切替弁の他方の受圧部は伸縮シリンダの短縮がわ管
路にっらねられており、かつ、同受圧部には設定圧用ば
ねが設けられている。 （ｆ） モーメント荷重検出用シリンダの圧力取出し
室と起伏シリンダの起しがわ室とは管路によりたがいに
つらねられており、その管路には起伏シリンダがわへの
流れを阻止するチェック弁が設けられている。[Scope of Claim for Utility Model Registration] A hydraulic motor for driving a hoisting winch, a hoisting cylinder for hoisting a telescopic boom, and a telescoping cylinder for extending and retracting the telescopic boom. The operating circuit for the telescopic cylinder is connected to the discharge of the hydraulic pump via a switching valve for operating the hydraulic motor, a switching valve for operating the hoisting cylinder, and a switching valve for operating the telescopic cylinder, respectively, and each of the operating circuits has a counter. A hydraulic circuit for a crane working machine equipped with a balance valve, which is configured as shown in (a) to (f) below. (a) A moment load detection cylinder that detects the moment load generated by the length of the telescoping boom and the suspended load is provided on the crane work equipment body. (b) A first switching valve that closes the i-way when the set pressure is exceeded is provided in the hoisting line between the hydraulic motor operation switching valve and the counterbalance valve of the hydraulic motor operation circuit. (C) One pressure receiving part of the first switching valve is connected to the pressure take-off chamber of the moment load detection cylinder by a conduit, and the conduit has a pilot which is opened by the pressure of the conduit while hoisting the hydraulic motor. A check valve is provided. The other pressure receiving part of the first switching valve is suspended in the hoisting side pipe of the hydraulic motor operation circuit, and the receiving and returning part is provided with a spring for setting pressure. (d) A second switching valve is provided between the telescopic cylinder operating switching valve and the counterbalance valve of the telescopic cylinder operating circuit, which closes the conduit when the set pressure is exceeded. (e) One pressure receiving member of the second switching valve is suspended by a conduit in the pressure extraction chamber of the moment load detection cylinder, and the conduit is opened by the pressure of the extension conduit of the telescopic cylinder operation circuit. A pit check valve is provided. The other pressure receiving part of the second switching valve is aligned with the shortened conduit of the telescopic cylinder, and the pressure receiving part is provided with a set pressure spring. (f) The pressure take-off chamber of the moment load detection cylinder and the erecting chamber of the undulation cylinder are connected to each other by a conduit, and the conduit is equipped with a check valve to prevent the flow toward the undulation cylinder. is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7266982U JPS58176888U (en) | 1982-05-18 | 1982-05-18 | Crane work equipment hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7266982U JPS58176888U (en) | 1982-05-18 | 1982-05-18 | Crane work equipment hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58176888U true JPS58176888U (en) | 1983-11-26 |
Family
ID=30082227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7266982U Pending JPS58176888U (en) | 1982-05-18 | 1982-05-18 | Crane work equipment hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58176888U (en) |
-
1982
- 1982-05-18 JP JP7266982U patent/JPS58176888U/en active Pending
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