JPS608747U - Pilot hydraulic circuit device for hydraulic construction machinery - Google Patents
Pilot hydraulic circuit device for hydraulic construction machineryInfo
- Publication number
- JPS608747U JPS608747U JP9884583U JP9884583U JPS608747U JP S608747 U JPS608747 U JP S608747U JP 9884583 U JP9884583 U JP 9884583U JP 9884583 U JP9884583 U JP 9884583U JP S608747 U JPS608747 U JP S608747U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- circuit
- pump
- accumulator
- pressure
- 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
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の液圧式建設機械のパイロット液圧回路装
置の構成説明図、第２図は本考案−実施例の構成説明図
である。
４はパイロットポンプ、３９は方向切換弁、４２はチェ
ック弁、４４はアキュムレータ。
ｔｉ、ｉｔ、
トーーー１十−−１１１
モ
１ ”’＋９１
１ ５１
］FIG. 1 is an explanatory diagram of the configuration of a conventional pilot hydraulic circuit device for a hydraulic construction machine, and FIG. 2 is an explanatory diagram of the configuration of an embodiment of the present invention. 4 is a pilot pump, 39 is a directional valve, 42 is a check valve, and 44 is an accumulator. ti, it, to-10--111 mo1 ”'+91 1 51]
Claims (1)
ボおよび作業機操作回路のメインポンプのポンプサーボ
をパイロット回路のパイロット圧で作動するようにした
ものにおいて、パイロット回路にパイロットポンプ４の
吐出圧を蓄圧するアキュムレータ４４を設け、パイロッ
ト回路にアキュムレータ４４のアンロード圧ＰＰ１で切
換作動してパイロットポンプ４の吐出側をタンク２１に
連通ずると共に、オンロード圧ＰＰ２で作動２してパイ
ロットポンプ４′の吐出側をアキュムレータ４４に連通
ずる方向切換弁３９を設けると共にパイロット回路に方
向切換弁３９側からアキュムレータ４４側にのみ流体を
流すチェック弁４２を設けたことを特徴とする液圧式建
設機械のパイロット液圧回路装置。In a system in which the valve servo of the main valve and the pump servo of the main pump of the work equipment operating circuit are operated by the pilot pressure of the pilot circuit, the discharge pressure of the pilot pump 4 is stored in the pilot circuit. An accumulator 44 is provided in the pilot circuit, and the pilot circuit is switched and operated by the unload pressure PP1 of the accumulator 44 to communicate the discharge side of the pilot pump 4 with the tank 21, and is operated by the on-load pressure PP2 to discharge the pilot pump 4'. Pilot hydraulic pressure of a hydraulic construction machine characterized in that a directional switching valve 39 whose side communicates with an accumulator 44 is provided, and a check valve 42 is provided in the pilot circuit to allow fluid to flow only from the directional switching valve 39 side to the accumulator 44 side. circuit device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9884583U JPS608747U (en) | 1983-06-28 | 1983-06-28 | Pilot hydraulic circuit device for hydraulic construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9884583U JPS608747U (en) | 1983-06-28 | 1983-06-28 | Pilot hydraulic circuit device for hydraulic construction machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS608747U true JPS608747U (en) | 1985-01-22 |
| JPH0329413Y2 JPH0329413Y2 (en) | 1991-06-24 |
Family
ID=30234503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9884583U Granted JPS608747U (en) | 1983-06-28 | 1983-06-28 | Pilot hydraulic circuit device for hydraulic construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0180030U (en) * | 1987-11-16 | 1989-05-29 |
-
1983
- 1983-06-28 JP JP9884583U patent/JPS608747U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0180030U (en) * | 1987-11-16 | 1989-05-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0329413Y2 (en) | 1991-06-24 |
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