JPH0321471U - - Google Patents
Info
- Publication number
- JPH0321471U JPH0321471U JP8264689U JP8264689U JPH0321471U JP H0321471 U JPH0321471 U JP H0321471U JP 8264689 U JP8264689 U JP 8264689U JP 8264689 U JP8264689 U JP 8264689U JP H0321471 U JPH0321471 U JP H0321471U
- Authority
- JP
- Japan
- Prior art keywords
- travel
- switching valve
- lever
- switching
- valves
- 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
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
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である。
１Ｌ，１Ｒ……左、右走行モータ、２Ｌ，２Ｒ
……左、右走行用切換弁、３Ｌ，３Ｒ……左、右
走行レバー、４，５，６，７……切換弁、８Ｌ８
Ｒ……リモコン弁、９Ｌ，９Ｒ……左、右作業レ
バー、１３，１４……第１、第２ポンプ、１５…
…パイロツトポンプ、１８……走行直進弁、２０
……第１の切換弁、２２……第２の切換弁、２５
，２６……リミツトスイツチ。
FIG. 1 is a hydraulic circuit diagram according to this invention. 1L, 1R...Left, right travel motor, 2L, 2R
...Left and right travel switching valves, 3L, 3R...Left and right travel levers, 4, 5, 6, 7...Switching valves, 8L8
R...Remote control valve, 9L, 9R...Left and right working levers, 13, 14...1st and 2nd pumps, 15...
... Pilot pump, 18 ... Straight travel valve, 20
...First switching valve, 22... Second switching valve, 25
, 26...Limit switch.
Claims (1)
タを２個のグループＡ，Ｂに分け、各々第１、第
２ポンプで駆動する如くし、左右の走行用切換弁
を上記各グループにそれぞれ配置し、これと他ア
クチユエータ操作用切換弁をタンデムに連結し、
かつ他アクチユエータ操作用切換弁をそれぞれ並
列に連結し、また第１、第２ポンプの吐出側に走
行直進弁を設けた油圧回路において、走行レバー
の作動を検知する手段と、走行レバーの作動を検
知して切換わる第１の切換弁と、走行以外の作業
レバーの操作により作動する第２の切換弁とを有
し、上記第１の切換弁と第２の切換弁をポンプ回
路で連通し、左右の走行レバーが作動状態にある
とき走行以外の作業レバーの作動を検知すると、
走行直進弁が切換えるように構成したことを特徴
とする油圧シヨベルの油圧回路。 The various hydraulic actuators installed on the hydraulic excavator are divided into two groups A and B, each driven by the first and second pumps, and left and right travel switching valves are placed in each group, respectively. The switching valves for actuator operation are connected in tandem,
In a hydraulic circuit in which switching valves for operating other actuators are connected in parallel, and straight travel valves are provided on the discharge sides of the first and second pumps, means for detecting the operation of the travel lever and means for detecting the operation of the travel lever are provided. It has a first switching valve that is switched upon detection, and a second switching valve that is activated by operation of a work lever for purposes other than traveling, and the first switching valve and the second switching valve are communicated through a pump circuit. , When the left and right travel levers are activated, if the operation of a work lever other than travel is detected,
A hydraulic circuit for a hydraulic excavator, characterized in that the straight travel valve is configured to switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8264689U JPH0321471U (en) | 1989-07-12 | 1989-07-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8264689U JPH0321471U (en) | 1989-07-12 | 1989-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321471U true JPH0321471U (en) | 1991-03-04 |
Family
ID=31629647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8264689U Pending JPH0321471U (en) | 1989-07-12 | 1989-07-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321471U (en) |
-
1989
- 1989-07-12 JP JP8264689U patent/JPH0321471U/ja active Pending