JPS63195106U - - Google Patents
Info
- Publication number
- JPS63195106U JPS63195106U JP8706587U JP8706587U JPS63195106U JP S63195106 U JPS63195106 U JP S63195106U JP 8706587 U JP8706587 U JP 8706587U JP 8706587 U JP8706587 U JP 8706587U JP S63195106 U JPS63195106 U JP S63195106U
- Authority
- JP
- Japan
- Prior art keywords
- drive unit
- hydraulic
- valve
- hydraulic pump
- hydraulic pressure
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
図面は本考案の実施例を示すもので、第１図は
ホイールローダの側面図、第２図はホイールロー
ダの駆動系の全体構成図である。
３……ブームシリンダ、６……バケツトシリン
ダ、７……ステアリングシリンダ、８……バルブ
ユニツト、９……バルブユニツト、１０……第１
油圧ポンプ、１１……第２油圧ポンプ、１２……
エンジン、１３……電磁開閉弁、１６……方向切
換弁、１６ａ……操作ハンドル、２７……逆止弁
、２９……リリーフ油路、３２……スイツチ。
The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a wheel loader, and FIG. 2 is an overall configuration diagram of the drive system of the wheel loader. 3... Boom cylinder, 6... Bucket cylinder, 7... Steering cylinder, 8... Valve unit, 9... Valve unit, 10... First
Hydraulic pump, 11... Second hydraulic pump, 12...
Engine, 13... Solenoid on-off valve, 16... Directional switching valve, 16a... Operation handle, 27... Check valve, 29... Relief oil path, 32... Switch.
Claims (1)
ーム駆動部と、これら駆動部に油圧を供給する第
１油圧ポンプと、バケツト駆動部とブーム駆動部
とに油圧を供給する第２油圧ポンプと、上記両油
圧ポンプと駆動輪駆動系を駆動するエンジンとを
備えたホイールローダにおいて、 上記第２油圧ポンプから延びる油圧供給路に逆
流防止用の逆止弁を介装するとともに、この油圧
供給路の逆止弁より上流側部分から油圧をリリー
フさせるリリーフ油路に電磁開閉弁を介装し、 上記ブーム駆動部のバルブを操作する操作ハン
ドルに上記電磁開閉弁を切換えるスイツチを設け
たことを特徴とするホイールローダの油圧負荷切
換装置。[Scope of Claim for Utility Model Registration] A steering drive unit, a bucket drive unit, a boom drive unit, a first hydraulic pump that supplies hydraulic pressure to these drive units, and a first hydraulic pump that supplies hydraulic pressure to the bucket drive unit and the boom drive unit. In a wheel loader equipped with a second hydraulic pump and an engine that drives both of the hydraulic pumps and the driving wheel drive system, a check valve for preventing backflow is interposed in the hydraulic pressure supply path extending from the second hydraulic pump, and An electromagnetic on-off valve is installed in the relief oil passage that relieves hydraulic pressure from the upstream portion of the check valve in this oil pressure supply passage, and a switch for switching the electromagnetic on-off valve is provided on the operating handle that operates the valve of the boom drive section. A hydraulic load switching device for a wheel loader, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8706587U JPS63195106U (en) | 1987-06-04 | 1987-06-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8706587U JPS63195106U (en) | 1987-06-04 | 1987-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63195106U true JPS63195106U (en) | 1988-12-15 |
Family
ID=30943948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8706587U Pending JPS63195106U (en) | 1987-06-04 | 1987-06-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63195106U (en) |
-
1987
- 1987-06-04 JP JP8706587U patent/JPS63195106U/ja active Pending
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