JPH01119456U - - Google Patents
Info
- Publication number
- JPH01119456U JPH01119456U JP1104188U JP1104188U JPH01119456U JP H01119456 U JPH01119456 U JP H01119456U JP 1104188 U JP1104188 U JP 1104188U JP 1104188 U JP1104188 U JP 1104188U JP H01119456 U JPH01119456 U JP H01119456U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valves
- travel
- switching
- hydraulic
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図はこの考案にかかる油圧回路図、第２図
は小形シヨベルの側面図、第３図は従来技術油圧
回路図である。
２，３……走行モータ、９……第１ポンプ、１
０……第２ポンプ、１１，１２……走行弁、１３
，〜，１６……切換弁、１７……走行直進弁、２
９……油タンク、３６……電磁弁、３８，〜，４
１……信号発生器、４２……コントローラ。
FIG. 1 is a hydraulic circuit diagram according to this invention, FIG. 2 is a side view of a small shovel, and FIG. 3 is a conventional hydraulic circuit diagram. 2, 3... Travel motor, 9... First pump, 1
0... Second pump, 11, 12... Travel valve, 13
, ~, 16...Switching valve, 17...Straight travel valve, 2
9... Oil tank, 36... Solenoid valve, 38, ~, 4
1...Signal generator, 42...Controller.
Claims (1)
Ｂに分け、各々第１、第２ポンプ吐出圧油により
作動するようにし、左右走行弁を各グループの最
前列に設け、これと他の油圧アクチユエータ用切
換弁をタンデムに連結し、かつその切換弁をそれ
ぞれ並列に連結し、また上記走行弁および切換弁
と、第１、第２ポンプとの連通油路に走行直進弁
を介設した油圧回路において、上記左右走行弁を
通過しないで上記走行直進弁と他の油圧アクチユ
エータ用切換弁とを連通する圧油供給油路に電磁
弁を設け、上記他の油圧アクチユエータをすべて
操作していないときは、上記電磁弁をタンク連通
油路位置に設定し、他の油圧アクチユエータのい
ずれか切換弁を切換操作したときには、その切換
操作信号にもとづき上記電磁弁を他の油圧アクチ
ユエータ用圧油供給油路位置に切換可能に構成し
たことを特徴とする小形シヨベルの油圧回路。 Various hydraulic actuators are grouped into two groups A,
A left and right travel valve is provided in the front row of each group, and this and other hydraulic actuator switching valves are connected in tandem, and the valves are operated by the pressure oil discharged from the first and second pumps. In a hydraulic circuit in which the valves are connected in parallel and a straight travel valve is interposed in the communication oil path between the travel valve and the switching valve and the first and second pumps, the travel is performed without passing through the left and right travel valves. A solenoid valve is installed in the pressure oil supply oil passage that communicates the straight forward valve with the switching valve for other hydraulic actuators, and when all of the other hydraulic actuators mentioned above are not being operated, the solenoid valve is set to the tank communication oil passage position. The small size device is characterized in that, when any of the switching valves of the other hydraulic actuators is switched, the solenoid valve is configured to be able to switch to the position of the pressure oil supply line for the other hydraulic actuator based on the switching operation signal. Shovel hydraulic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1104188U JPH01119456U (en) | 1988-01-28 | 1988-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1104188U JPH01119456U (en) | 1988-01-28 | 1988-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01119456U true JPH01119456U (en) | 1989-08-14 |
Family
ID=31219243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1104188U Pending JPH01119456U (en) | 1988-01-28 | 1988-01-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01119456U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0365769U (en) * | 1989-10-31 | 1991-06-26 |
-
1988
- 1988-01-28 JP JP1104188U patent/JPH01119456U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0365769U (en) * | 1989-10-31 | 1991-06-26 |