JPS62163558U - - Google Patents
Info
- Publication number
- JPS62163558U JPS62163558U JP5083286U JP5083286U JPS62163558U JP S62163558 U JPS62163558 U JP S62163558U JP 5083286 U JP5083286 U JP 5083286U JP 5083286 U JP5083286 U JP 5083286U JP S62163558 U JPS62163558 U JP S62163558U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic cylinder
- hydraulic
- cylinder
- hydraulic excavator
- drive circuit
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例に係る側溝掘フロント
駆動回路の油圧回路図、第２図および第３図はそ
れぞれ側溝掘フロントの平面図および側面図、第
４図は従来の側溝掘フロント駆動回路の油圧回路
図である。
１……運転室、２ａ……ロアブーム、２ｂ……
アツパブーム、４……アーム、５……バケツト、
６……ブームシリンダ、７……オフセツトシリン
ダ、１１……方向切換弁、１２……切換弁、１３
……近接状態検出器。
Fig. 1 is a hydraulic circuit diagram of a side ditch front drive circuit according to an embodiment of the present invention, Figures 2 and 3 are a plan view and side view of the side ditch front, respectively, and Figure 4 is a conventional side ditch front drive. FIG. 3 is a hydraulic circuit diagram of the circuit. 1... Driver's cab, 2a... Lower boom, 2b...
Atsupahboom, 4...Arm, 5...Bucket,
6... Boom cylinder, 7... Offset cylinder, 11... Directional switching valve, 12... Switching valve, 13
...Proximity state detector.
Claims (1)
ロントにおいて、このフロントのリンク機構を構
成する複数の部材のうちの１つを駆動する第１の
油圧シリンダと、他の１つを駆動する第２の油圧
シリンダと、前記油圧シヨベル本体と前記複数の
部材のうちの１つとの近接状態を検出する検出手
段と、この検出手段が所定以上の近接状態を検出
したとき前記第１の油圧シリンダの油を近接した
当該部材が前記本体から離れる方向に移動するよ
うに前記第２の油圧シリンダに導入する切換弁と
を設けたことを特徴とする油圧シヨベルのフロン
ト駆動回路。 (2) 実用新案登録請求の範囲第(1)項において、
前記第１の油圧シリンダは、ブームシリンダであ
ることを特徴とする油圧シヨベルのフロント駆動
回路。 (3) 実用新案登録請求の範囲第(1)項において、
前記第１の油圧シリンダおよび前記第２の油圧シ
リンダは、それぞれ油圧シヨベルの側溝掘フロン
トにおけるブームシリンダおよびオフセツトシリ
ンダであることを特徴とする油圧シヨベルのフロ
ント駆動回路。[Claims for Utility Model Registration] (1) In a front rotatably connected to the main body of a hydraulic excavator, a first hydraulic cylinder that drives one of a plurality of members constituting a link mechanism of the front; , a second hydraulic cylinder that drives the other one, a detection means for detecting a state of proximity between the hydraulic excavator main body and one of the plurality of members, and this detection means detects a state of proximity of a predetermined level or more. and a switching valve for introducing oil from the first hydraulic cylinder into the second hydraulic cylinder so that the adjacent member moves away from the main body. drive circuit. (2) In paragraph (1) of claims for utility model registration,
A front drive circuit for a hydraulic excavator, wherein the first hydraulic cylinder is a boom cylinder. (3) In paragraph (1) of claims for utility model registration,
A front drive circuit for a hydraulic excavator, wherein the first hydraulic cylinder and the second hydraulic cylinder are a boom cylinder and an offset cylinder, respectively, at a trench digging front of the hydraulic excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5083286U JPH0439879Y2 (en) | 1986-04-07 | 1986-04-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5083286U JPH0439879Y2 (en) | 1986-04-07 | 1986-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62163558U true JPS62163558U (en) | 1987-10-17 |
| JPH0439879Y2 JPH0439879Y2 (en) | 1992-09-18 |
Family
ID=30874548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5083286U Expired JPH0439879Y2 (en) | 1986-04-07 | 1986-04-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439879Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01271535A (en) * | 1988-04-22 | 1989-10-30 | Yanmar Diesel Engine Co Ltd | Dangerous area avoiding device for work machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269637B1 (en) | 1998-03-31 | 2001-08-07 | Shin Caterpillar Mitsubishi, Ltd. | Hydraulic pressure control circuit for a working machine |
-
1986
- 1986-04-07 JP JP5083286U patent/JPH0439879Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01271535A (en) * | 1988-04-22 | 1989-10-30 | Yanmar Diesel Engine Co Ltd | Dangerous area avoiding device for work machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0439879Y2 (en) | 1992-09-18 |
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