JPH0226665U - - Google Patents
Info
- Publication number
- JPH0226665U JPH0226665U JP10303688U JP10303688U JPH0226665U JP H0226665 U JPH0226665 U JP H0226665U JP 10303688 U JP10303688 U JP 10303688U JP 10303688 U JP10303688 U JP 10303688U JP H0226665 U JPH0226665 U JP H0226665U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- pilot
- control valves
- valves
- branch point
- 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
- 239000003921 oil Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
図面は本考案に係る作業車の油圧回路構造の実
施例を示し、第１図はバツクホウにおける油圧モ
ータ、油圧シリンダとこの両者に対する第１・第
２制御弁、並びにこの第１・第２制御弁を切換操
作する第１・第２パイロツト弁の接続状態を示す
油圧回路図、第２図は従来構造を示す油圧回路図
である。
１，２……油圧アクチユエータ、４，５……制
御弁、６，７……パイロツト弁、８，９……人為
操作具、１０……ポンプ、１１……分岐点、１４
……開閉弁、１５，１６……分岐点から各パイロ
ツト弁に至る油路、１７ａ，１７ｂ……逆止弁。
The drawings show an embodiment of the hydraulic circuit structure of a work vehicle according to the present invention, and FIG. 1 shows a hydraulic motor in a backhoe, a hydraulic cylinder, first and second control valves for both, and the first and second control valves. FIG. 2 is a hydraulic circuit diagram showing a conventional structure. 1, 2... Hydraulic actuator, 4, 5... Control valve, 6, 7... Pilot valve, 8, 9... Human operating tool, 10... Pump, 11... Branch point, 14
...Opening/closing valve, 15, 16...Oil passage leading from the branch point to each pilot valve, 17a, 17b...Check valve.
Claims (1)
排操作を行う複数の制御弁４，５と、前記各制御
弁４，５を油圧により切換操作するパイロツト弁
６，７と、このパイロツト弁６，７を切換操作す
る人為操作具８，９とを備えた作業車の油圧回路
構造であつて、ポンプ１０から前記各パイロツト
弁６，７に対して制御弁切換操作用の操作動油を
並列供給すると共に、この並列供給用油路におけ
る各パイロツト弁６，７への分岐点１１よりポン
プ１０側に開閉弁１４を設け、且つ、前記分岐点
１１とパイロツト弁６，７との間の各油路１５，
１６に分岐点１１側への逆流を止める逆止弁１７
ａ，１７ｂを設けてある作業車の油圧回路構造。 A plurality of control valves 4, 5 for supplying and discharging hydraulic oil to the hydraulic actuators 1, 2, pilot valves 6, 7 for switching the respective control valves 4, 5 by hydraulic pressure, and the pilot valves 6, This is a hydraulic circuit structure for a working vehicle equipped with human operating tools 8 and 9 for switching control valves 7 and 7, in which hydraulic fluid for switching control valves is supplied from a pump 10 to each of the pilot valves 6 and 7 in parallel. At the same time, an on-off valve 14 is provided on the pump 10 side from the branch point 11 to each pilot valve 6, 7 in this parallel supply oil path, and each oil between the branch point 11 and the pilot valve 6, 7 is Road 15,
A check valve 17 that stops backflow to the branch point 11 side is provided at 16.
Hydraulic circuit structure of a work vehicle provided with a and 17b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10303688U JPH0226665U (en) | 1988-08-02 | 1988-08-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10303688U JPH0226665U (en) | 1988-08-02 | 1988-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226665U true JPH0226665U (en) | 1990-02-21 |
Family
ID=31333492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10303688U Pending JPH0226665U (en) | 1988-08-02 | 1988-08-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226665U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63151731A (en) * | 1986-12-15 | 1988-06-24 | Yutani Heavy Ind Ltd | Oil-pressure circuit for oil-pressure shovel |
-
1988
- 1988-08-02 JP JP10303688U patent/JPH0226665U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63151731A (en) * | 1986-12-15 | 1988-06-24 | Yutani Heavy Ind Ltd | Oil-pressure circuit for oil-pressure shovel |
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