JPS62202502U - - Google Patents
Info
- Publication number
- JPS62202502U JPS62202502U JP9224286U JP9224286U JPS62202502U JP S62202502 U JPS62202502 U JP S62202502U JP 9224286 U JP9224286 U JP 9224286U JP 9224286 U JP9224286 U JP 9224286U JP S62202502 U JPS62202502 U JP S62202502U
- Authority
- JP
- Japan
- Prior art keywords
- negative
- pressure
- switching valve
- pilot
- control
- 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
- 239000013642 negative control Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の油圧回路図、第２図は本考案
のリリーフ弁断面図、第３図はリモコン圧力とネ
ガコン圧力との関係図表、第４図は従来技術の油
圧回路図、第５図は従来技術のリリーフ弁断面図
である。
１……可変ポンプ、２……レギユレータ、９…
…センタバイパス油路、１０……リモコン弁、１
１……操作レバ、１３ａ，１３ｂ……切換弁、１
３ｃ，１３ｄ……切換弁、１６……パイロツトポ
ンプ、２２，２２′……リリーフ弁、３１，３１
′……ポペツト、３７……ネガコンパイロツト圧
受圧部。
Figure 1 is a hydraulic circuit diagram of the present invention, Figure 2 is a sectional view of the relief valve of the present invention, Figure 3 is a relationship chart between remote control pressure and negative control pressure, Figure 4 is a hydraulic circuit diagram of the prior art, and Figure 5 is a hydraulic circuit diagram of the prior art. The figure is a sectional view of a conventional relief valve. 1...variable pump, 2...regulator, 9...
...Center bypass oil passage, 10...Remote control valve, 1
1...Operation lever, 13a, 13b...Switching valve, 1
3c, 13d...Switching valve, 16...Pilot pump, 22, 22'...Relief valve, 31, 31
'... Poppet, 37... Negative compiler pressure receiving part.
Claims (1)
バイパス油路出口側より導出せしめたネガコン圧
力をレギユレータに作用させて可変ポンプの吐出
油量を制御せしめ、かつ、リモコン用操作レバの
操作によりパイロツトポンプからの吐出圧油をパ
イロツト弁を介し上記切換弁に作用させ、該切換
弁の切換制御を可変としたリモートコントロール
操作方式の建設機械において、パイロツトポンプ
吐出油をリリーフせしめるリリーフ弁のポペツト
部にネガコンパイロツト圧受圧部を設け、該ネガ
コンパイロツト圧受圧部を切換弁のセンタバイパ
ス出口側に連通せしめるとともに、そのネガコン
パイロツト圧受圧部に作用するネガコン圧力の変
動により上記リリーフ弁のリリーフセツト圧力を
変動可能に構成していることを特徴とするリモコ
ン用パイロツトポンプ制御装置。 The negative control pressure derived from the center bypass oil passage outlet side of the switching valve for operating various hydraulic actuators is applied to the regulator to control the amount of oil discharged from the variable pump, and the amount of oil discharged from the pilot pump is controlled by operating the remote control lever. In a remote control construction machine in which pressurized oil is applied to the switching valve via a pilot valve and the switching control of the switching valve is variable, a negative controller pilot pressure is applied to the poppet part of the relief valve that relieves the pilot pump discharge oil. The negative compiler pressure receiving part is connected to the center bypass outlet side of the switching valve, and the relief set pressure of the relief valve is configured to be variable by fluctuations in the negative compass pressure acting on the negative compiler pressure receiving part. A remote control pilot pump control device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9224286U JPS62202502U (en) | 1986-06-16 | 1986-06-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9224286U JPS62202502U (en) | 1986-06-16 | 1986-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62202502U true JPS62202502U (en) | 1987-12-24 |
Family
ID=30953770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9224286U Pending JPS62202502U (en) | 1986-06-16 | 1986-06-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62202502U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6145101A (en) * | 1984-08-03 | 1986-03-05 | Yuatsu Kiki Hanbai Kk | Unload circuit |
-
1986
- 1986-06-16 JP JP9224286U patent/JPS62202502U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6145101A (en) * | 1984-08-03 | 1986-03-05 | Yuatsu Kiki Hanbai Kk | Unload circuit |