JPH032061U - - Google Patents
Info
- Publication number
- JPH032061U JPH032061U JP5948289U JP5948289U JPH032061U JP H032061 U JPH032061 U JP H032061U JP 5948289 U JP5948289 U JP 5948289U JP 5948289 U JP5948289 U JP 5948289U JP H032061 U JPH032061 U JP H032061U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- hydraulic cylinder
- bottom side
- valve
- control device
- 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 4
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案の第１実施例を示す作業機の制
御装置の制御系統図、第２図は同第２実施例を示
す制御系統図、第３図は油圧式堀削機の概略側面
図、第４図は油圧リリーフ時間を示す説明図、第
５図は油圧−流量関係図を示す。
１１……作業機操作用油圧シリンダ、１５，２
８……方向切換弁、１９……油圧スイツチ、２０
，２５……電子制御装置、２３……作業機操作レ
バー、２４……制御ＯＮ，ＯＦＦ切換スイツチ、
２７ａ，２７ｂ……開閉弁。
Fig. 1 is a control system diagram of a control device for a work machine showing a first embodiment of the present invention, Fig. 2 is a control system diagram showing a second embodiment of the same, and Fig. 3 is a schematic side view of a hydraulic excavator. FIG. 4 is an explanatory diagram showing the oil pressure relief time, and FIG. 5 is a diagram showing the oil pressure-flow rate relationship. 11...Hydraulic cylinder for operating work equipment, 15,2
8... Directional switching valve, 19... Hydraulic switch, 20
, 25...Electronic control device, 23...Work machine operating lever, 24...Control ON/OFF switch,
27a, 27b...Opening/closing valve.
Claims (1)
圧によつて作動する作業機の操作用油圧シリンダ
と、該油圧シリンダへの供給油圧を操作レバーに
より制御する方向切換弁とを備えたものにおいて
、前記油圧シリンダのボトム側への吐出回路側に
リリーフセツト圧を検知する油圧スイツチと、該
油圧スイツチが検知したリリーフセツト圧の信号
を受けて方向切換弁を切換え、前記油圧シリンダ
のボトム側へ供給していた油圧ポンプからの吐出
油圧をヘツド側へ切換え供給する電子制御装置と
を設けたことを特徴とする作業機の制御装置。 ２ 油圧ポンプと、この油圧ポンプからの吐出油
圧によつて作動する作業機の操作用油圧シリンダ
と、該油圧シリンダへの供給油圧を操作レバーに
より制御する方向切換弁とを備えたものにおいて
、前記油圧シリンダのボトム側への吐出回路側に
リリーフセツト圧を検知する油圧スイツチと、前
記油圧シリンダのボトム側回路とヘツド側回路間
に開閉弁とを設け、前記油圧スイツチが検知した
リリーフセツト圧信号を受けて、前記開閉弁を開
いて油圧シリンダのボトム側油圧をヘツド側へバ
イパス供給するようにした電子制御装置を設けた
ことを特徴とする作業機の制御装置。[Scope of Claim for Utility Model Registration] 1. A hydraulic pump, a hydraulic cylinder for operating a working machine that is operated by the hydraulic pressure discharged from the hydraulic pump, and a directional switching valve that controls the hydraulic pressure supplied to the hydraulic cylinder by an operating lever. a hydraulic switch for detecting a relief set pressure on the discharge circuit side to the bottom side of the hydraulic cylinder; and a directional control valve for switching the directional control valve in response to a signal of the relief set pressure detected by the hydraulic switch; 1. A control device for a working machine, comprising: an electronic control device that switches and supplies hydraulic pressure discharged from a hydraulic pump from a bottom side of a hydraulic cylinder to a head side. 2. A hydraulic pump, a hydraulic cylinder for operating a working machine operated by hydraulic pressure discharged from the hydraulic pump, and a directional control valve for controlling the hydraulic pressure supplied to the hydraulic cylinder by a control lever, the above-mentioned A hydraulic switch for detecting the relief set pressure is provided on the discharge circuit side to the bottom side of the hydraulic cylinder, and an on-off valve is provided between the bottom side circuit and the head side circuit of the hydraulic cylinder, and the relief set pressure signal detected by the hydraulic switch is provided. 1. A control device for a working machine, comprising: an electronic control device configured to open the on-off valve and bypass-supply the bottom side hydraulic pressure of the hydraulic cylinder to the head side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5948289U JPH032061U (en) | 1989-05-23 | 1989-05-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5948289U JPH032061U (en) | 1989-05-23 | 1989-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH032061U true JPH032061U (en) | 1991-01-10 |
Family
ID=31586014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5948289U Pending JPH032061U (en) | 1989-05-23 | 1989-05-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032061U (en) |
-
1989
- 1989-05-23 JP JP5948289U patent/JPH032061U/ja active Pending
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