JPS59102649U - Hydraulic drive control device - Google Patents
Hydraulic drive control deviceInfo
- Publication number
- JPS59102649U JPS59102649U JP19869682U JP19869682U JPS59102649U JP S59102649 U JPS59102649 U JP S59102649U JP 19869682 U JP19869682 U JP 19869682U JP 19869682 U JP19869682 U JP 19869682U JP S59102649 U JPS59102649 U JP S59102649U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- passage
- directional
- pilot pressure
- variable displacement
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来装置の油圧回路図、第２図は本考案の一実
施例を示す油圧回路図、第３図及び第４図はそれぞれパ
イロット弁によりフロート位置を含む４位置に選択的に
切換えられる方向切換弁の油圧回路図、第５図は可変容
量形ポンプのいま一つの流量制御機構説明図である。
１・・・可変容量形ポンプ、２・・・レギュレータ、１
１・・・サーボ弁、１２・・・４位置切換弁、１３・・
・液圧シリンダ、１４・・・サーボポンプ、１５・・・
パイロット弁、２５・・・シャトル弁、３１・・・切換
弁、３７゜４２・・・方向切換弁。
第２図
■
Ｉ −ｍ−
’ｌ、−１７−
Ｌ−惺。
旧
−
・ ６」
“ＩＯ
・慴
２６
−
一７’ Ｉ −Figure 1 is a hydraulic circuit diagram of a conventional device, Figure 2 is a hydraulic circuit diagram showing an embodiment of the present invention, and Figures 3 and 4 are selectively switched to four positions including the float position by pilot valves. FIG. 5 is an explanatory diagram of another flow rate control mechanism of a variable displacement pump. 1... Variable displacement pump, 2... Regulator, 1
1... Servo valve, 12... 4 position switching valve, 13...
・Hydraulic cylinder, 14... Servo pump, 15...
Pilot valve, 25... Shuttle valve, 31... Switching valve, 37° 42... Directional switching valve. Figure 2 ■ I -m- 'l, -17- L-惺. Old-・6” “IO・慴26-17'I-
Claims (1)
つパイロット弁からのパイロット圧によりフロート位置
を含む４位置に選択的に切換えられる方向切換弁を備え
、この方向切換弁をフロート位置に切換えるためのパイ
ロット圧通路と、フロート位置及び中立位置を除く二つ
のアクチュエータ位置の一方の位置に方向切換弁を切換
えるときにのみ使用するアクチュエータ位置専用のパイ
ロット圧通路とをシャトル弁を介して可変容量形ポンプ
の流量制御機構に接続し方向切換弁が中立位置をとると
き、可変容量形ポンプの吐出流量を最少にした装置にお
いて、方向切換弁をフロート位置にとるためのパイロッ
ト圧通路とシャトル弁とを接続する通路に開閉弁を介装
し、この開閉弁は方向切換弁がフロート位置をとるとき
通路をし−や断し、それ以外では通路を連通ずるように
したことを特徴とする液圧駆動制御装置。A directional switching valve is provided between the variable displacement pump and the actuator and can be selectively switched to four positions including a float position by pilot pressure from a pilot valve. The pilot pressure passage and the pilot pressure passage dedicated to the actuator position, which is used only when switching the directional control valve to one of the two actuator positions excluding the float position and the neutral position, are connected to the variable displacement pump via the shuttle valve. In a device that minimizes the discharge flow rate of a variable displacement pump when connected to a flow rate control mechanism and the directional valve assumes a neutral position, a shuttle valve is connected to a pilot pressure passage for setting the directional valve to a float position. A hydraulic drive control device characterized in that an on-off valve is interposed in the passage, and the on-off valve slightly cuts off the passage when the directional control valve assumes a float position, and allows the passage to communicate at other times. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19869682U JPS59102649U (en) | 1982-12-27 | 1982-12-27 | Hydraulic drive control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19869682U JPS59102649U (en) | 1982-12-27 | 1982-12-27 | Hydraulic drive control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59102649U true JPS59102649U (en) | 1984-07-10 |
| JPH0118692Y2 JPH0118692Y2 (en) | 1989-05-31 |
Family
ID=30424259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19869682U Granted JPS59102649U (en) | 1982-12-27 | 1982-12-27 | Hydraulic drive control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59102649U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7372726B2 (en) * | 2020-05-11 | 2023-11-01 | キャタピラー エス エー アール エル | Boom control device for construction machinery |
-
1982
- 1982-12-27 JP JP19869682U patent/JPS59102649U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0118692Y2 (en) | 1989-05-31 |
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