JPS6453504U - - Google Patents
Info
- Publication number
- JPS6453504U JPS6453504U JP14734287U JP14734287U JPS6453504U JP S6453504 U JPS6453504 U JP S6453504U JP 14734287 U JP14734287 U JP 14734287U JP 14734287 U JP14734287 U JP 14734287U JP S6453504 U JPS6453504 U JP S6453504U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- hydraulic pump
- steering
- work equipment
- oil discharged
- 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
- 238000010276 construction Methods 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Control And Safety Of Cranes (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Description
図は本考案の実施例を示す油圧回路図である。
１……ステアリング用油圧ポンプ、２……作業
機用油圧ポンプ、３……エンジン、４……減速機
、７……動力取出し装置（ＰＴＯ）、８……入力
回路、９……ステアリング用バルブ、１０……ス
テアリングシリンダ（ステアリング装置）、１５
……第１切替弁、１６……入力回路、１７……作
業機用バルブ、１８……戻り回路、１９……バイ
パス回路、２０……第２切替弁、２２……合流回
路、２３……スイツチ、２４……リレー、２６…
…スイツチ、２７……回転数検出器。
The figure is a hydraulic circuit diagram showing an embodiment of the present invention. 1...Hydraulic pump for steering, 2...Hydraulic pump for work equipment, 3...Engine, 4...Reducer, 7...Power take-off device (PTO), 8...Input circuit, 9...Steering valve , 10... Steering cylinder (steering device), 15
...First switching valve, 16...Input circuit, 17...Work machine valve, 18...Return circuit, 19...Bypass circuit, 20...Second switching valve, 22...Merge circuit, 23... Switch, 24... Relay, 26...
...Switch, 27...Rotation speed detector.
Claims (1)
ング用バルブを介してステアリング装置に供給す
るステアリング回路と、作業機用油圧ポンプの吐
出油を作業機用バルブを介して作業機に供給する
作業機回路と、上記各油圧ポンプを駆動するエン
ジンと、走行モードでエンジンの回転数が低い時
に作業機用油圧ポンプの吐出油をステアリング用
油圧ポンプの吐出油と合流させてステアリング用
バルブの入力回路に導く状態と、走行モードでエ
ンジンが所定の回転数以上になつた時および作業
モードの時に作業機用油圧ポンプの吐出油を作業
機用バルブの入力回路に導く状態とに切替える第
１切替弁と、作業機用バルブの入力回路に導かれ
る圧油を走行モードの時にタンクに導くアンロー
ド状態と、作業モードの時に作業機用バルブ側に
導くオンロード状態とに切替える第２切替弁とを
具備していることを特徴とする車両系建設機械の
油圧回路。 a steering circuit that supplies oil discharged from a steering hydraulic pump to the steering device via a steering valve; a work equipment circuit that supplies oil discharged from a hydraulic pump for a work equipment to the work equipment via a work equipment valve; an engine that drives each hydraulic pump, and a state in which the oil discharged from the hydraulic pump for the work equipment is combined with the oil discharged from the steering hydraulic pump and guided to the input circuit of the steering valve when the engine rotation speed is low in the driving mode; A first switching valve for switching to a state in which oil discharged from a hydraulic pump for a working machine is guided to an input circuit of a valve for the working machine when the engine reaches a predetermined rotation speed or higher in the driving mode and when the engine is in the working mode; Equipped with a second switching valve that switches between an unload state in which the pressure oil led to the input circuit of the valve is guided to the tank when in the travel mode, and an on-load state in which the pressure oil is guided to the work equipment valve side in the work mode. A hydraulic circuit for vehicle-based construction machinery featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14734287U JPS6453504U (en) | 1987-09-26 | 1987-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14734287U JPS6453504U (en) | 1987-09-26 | 1987-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6453504U true JPS6453504U (en) | 1989-04-03 |
Family
ID=31417648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14734287U Pending JPS6453504U (en) | 1987-09-26 | 1987-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6453504U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221253B2 (en) | 2002-07-09 | 2007-05-22 | Smart Electronics Inc. | Fusible resistor and method of fabricating the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5523047U (en) * | 1978-08-02 | 1980-02-14 |
-
1987
- 1987-09-26 JP JP14734287U patent/JPS6453504U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5523047U (en) * | 1978-08-02 | 1980-02-14 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221253B2 (en) | 2002-07-09 | 2007-05-22 | Smart Electronics Inc. | Fusible resistor and method of fabricating the same |
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