JPH0321469U - - Google Patents
Info
- Publication number
- JPH0321469U JPH0321469U JP8129689U JP8129689U JPH0321469U JP H0321469 U JPH0321469 U JP H0321469U JP 8129689 U JP8129689 U JP 8129689U JP 8129689 U JP8129689 U JP 8129689U JP H0321469 U JPH0321469 U JP H0321469U
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- pilot
- main switching
- valve
- operating
- 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
- 238000011017 operating method Methods 0.000 claims 3
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Description
第１図はこの考案にかかる操作装置を示す回路
図、第２図は従来技術操作装置を示す回路図であ
る。
５，〜，１０……制御弁、１４……主切換弁、
１６……副切換弁、１８，１９……リモコン弁、
２０，２１……操作レバー、２２，〜，２９……
パイロツト弁、３０……パイロツトポンプ、３３
……パイロツト回路、３４……電磁弁、３６，３
７……リミツトスイツチ。
FIG. 1 is a circuit diagram showing an operating device according to this invention, and FIG. 2 is a circuit diagram showing a conventional operating device. 5, ~, 10...control valve, 14...main switching valve,
16... Sub-switching valve, 18, 19... Remote control valve,
20, 21...operation lever, 22,~,29...
Pilot valve, 30...Pilot pump, 33
...Pilot circuit, 34...Solenoid valve, 36,3
7...Limit switch.
Claims (1)
の作動を制御する所要数のパイロツト式制御弁と
、これら各制御弁のパイロツトポートに対応する
所要数のパイロツト弁と、これらのパイロツト弁
を操作する複数の操作レバーと、上記各制御弁の
パイロツトポートと各パイロツト弁とを接続する
１個の操作方式主切換弁をそなえ、その主切換弁
の所定の各ポジシヨンのうちいずれかポジシヨン
に対して、そのポジシヨンの一部の入力ポートと
出力ポートとの接続関係を変換するために副切換
弁を上記主切換弁に直列に接続して設け、主切換
弁を所要のポジシヨンに切換操作してさらに副切
換弁を切換操作したとき主切換弁による操作方式
にもとづきさらに別の操作方式を設定できるよう
にした操作装置において、上記主切換弁および副
切換弁にそれぞれリミツトスイツチを設け、また
パイロツトポンプとリモコン弁とを連通するパイ
ロツト回路に電磁弁を設け、主切換弁、副切換弁
をそれぞれ所定の操作方式におけるポジシヨン操
作位置に切換えたとき上記電磁弁により上記パイ
ロツト回路を連通状態とし、主切換弁、副切換弁
をそれぞれ所要以外のポジシヨン、基準位置以外
の位置に切換えたときパイロツト回路を遮断状態
とするように構成したことを特徴とする油圧シヨ
ベルの操作装置。 A required number of pilot type control valves for controlling the operation of various hydraulic actuators in a hydraulic excavator, a required number of pilot valves corresponding to the pilot ports of each of these control valves, and a plurality of operating levers for operating these pilot valves; A main switching valve with an operating method is provided that connects the pilot port of each of the control valves and each pilot valve, and for any one of the predetermined positions of the main switching valve, a part of that position is In order to change the connection relationship between the input port and the output port, a sub-switching valve was connected in series to the above-mentioned main switching valve, and the main switching valve was switched to the required position, and then the sub-switching valve was switched. The operating device is capable of setting another operating method based on the operating method of the main switching valve, and the main switching valve and the auxiliary switching valve are each provided with a limit switch, and a pilot circuit that communicates the pilot pump and the remote control valve is provided. A solenoid valve is provided in the main switching valve and the sub switching valve, and when the main switching valve and the sub switching valve are respectively switched to the operating position in the predetermined operation method, the pilot circuit is brought into communication state by the solenoid valve, and the main switching valve and the sub switching valve are respectively switched to the position other than the required one. An operating device for a hydraulic excavator, characterized in that the pilot circuit is cut off when the position is changed to a position other than the reference position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8129689U JPH0321469U (en) | 1989-07-10 | 1989-07-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8129689U JPH0321469U (en) | 1989-07-10 | 1989-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321469U true JPH0321469U (en) | 1991-03-04 |
Family
ID=31627111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8129689U Pending JPH0321469U (en) | 1989-07-10 | 1989-07-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321469U (en) |
-
1989
- 1989-07-10 JP JP8129689U patent/JPH0321469U/ja active Pending
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