JPS6189484U - - Google Patents
Info
- Publication number
- JPS6189484U JPS6189484U JP17457484U JP17457484U JPS6189484U JP S6189484 U JPS6189484 U JP S6189484U JP 17457484 U JP17457484 U JP 17457484U JP 17457484 U JP17457484 U JP 17457484U JP S6189484 U JPS6189484 U JP S6189484U
- Authority
- JP
- Japan
- Prior art keywords
- oil passage
- operated
- hydraulic
- valve
- breaker
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fluid-Pressure Circuits (AREA)
- Percussive Tools And Related Accessories (AREA)
- Shovels (AREA)
- Component Parts Of Construction Machinery (AREA)
Description
第１図は本考案の実施例の油圧回路図、第２図
は従来のものの油圧回路図である。
１……第１油圧ポンプ、２……第１分配弁、５
……タンク、６……第２油圧ポンプ、７……第２
分配弁、１０……アームシリンダ、１２……油路
、１３……ヘツド側油室、２０……パイロツト切
換弁、２１……オーバーロードリリーフ弁、２２
……油路、２３……パイロツト油路、２４……絞
り弁、２５……チエツク弁。
FIG. 1 is a hydraulic circuit diagram of an embodiment of the present invention, and FIG. 2 is a conventional hydraulic circuit diagram. 1...First hydraulic pump, 2...First distribution valve, 5
... Tank, 6 ... Second hydraulic pump, 7 ... Second
Distribution valve, 10... Arm cylinder, 12... Oil passage, 13... Head side oil chamber, 20... Pilot switching valve, 21... Overload relief valve, 22
...oil passage, 23...pilot oil passage, 24...throttle valve, 25...check valve.
Claims (1)
プに分け、各々別個の油圧モータで作動する如く
し、油圧ブレーカを一方のグループの油圧ポンプ
で、アームシリンダを他方のグループの油圧ポン
プで作動する如くした装置において、アームシリ
ンダのヘツド側油室に通ずる油路からタンクへ分
岐油路を設け、これにパイロツト切換弁と、その
下流側にオーバーロードリリーフ弁を設けると共
に、ブレーカ作動油路からパイロツト切換弁へパ
イロツト油路を通ぜしめ、該油路に絞り弁とチエ
ツク弁を設けたことよりなるブレーカのチゼル折
損防止装置。 In a device in which the actuators of a hydraulic excavator are divided into two groups, each operated by a separate hydraulic motor, the hydraulic breaker is operated by the hydraulic pump of one group, and the arm cylinder is operated by the hydraulic pump of the other group. A branch oil passage is provided from the oil passage leading to the head side oil chamber of the arm cylinder to the tank, and a pilot switching valve and an overload relief valve are installed downstream of the oil passage, and a pilot switching valve is installed from the breaker operating oil passage to the pilot switching valve. A device for preventing breakage of a chisel of a breaker, which includes an oil passage connected to the oil passage, and a throttle valve and a check valve provided in the oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984174574U JPH0118305Y2 (en) | 1984-11-17 | 1984-11-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984174574U JPH0118305Y2 (en) | 1984-11-17 | 1984-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6189484U true JPS6189484U (en) | 1986-06-11 |
| JPH0118305Y2 JPH0118305Y2 (en) | 1989-05-29 |
Family
ID=30732193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984174574U Expired JPH0118305Y2 (en) | 1984-11-17 | 1984-11-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0118305Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5823588U (en) * | 1981-08-11 | 1983-02-14 | 太田 とし子 | Equipment to prevent clothes hangers, etc. from falling or moving |
-
1984
- 1984-11-17 JP JP1984174574U patent/JPH0118305Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5823588U (en) * | 1981-08-11 | 1983-02-14 | 太田 とし子 | Equipment to prevent clothes hangers, etc. from falling or moving |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0118305Y2 (en) | 1989-05-29 |
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