JPS59156961U - Hydraulic circuit of hydraulic work equipment - Google Patents
Hydraulic circuit of hydraulic work equipmentInfo
- Publication number
- JPS59156961U JPS59156961U JP5017983U JP5017983U JPS59156961U JP S59156961 U JPS59156961 U JP S59156961U JP 5017983 U JP5017983 U JP 5017983U JP 5017983 U JP5017983 U JP 5017983U JP S59156961 U JPS59156961 U JP S59156961U
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- hydraulic pump
- hydraulic
- directional
- actuator
- 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
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図および第２図は本考案の油圧回路が適用される油
圧作業機の一例として挙げた油圧ショベルを示す説明図
で、第１図は側面図、第２図は平面図、第３図は従来の
油圧作業機の油圧回路を示す回路図、第４図は本考案の
油圧作業機の油圧回路の一実施例を示す回路図、第５図
は本考案の別の実施例を示す回路図である。
５・・・左走行モータ（第１の走行モータ）、７・・・
右走行モータ（第２の走行モータ）、１４・・・第１の
油圧ポンプ、１５・・・左走行用方向切換弁（第１の走
行用方向切換弁）、１７・・・アーム用方向切換弁、１
８・・・第２の油圧ポンプ、２１・・・右走行用方向切
換弁（第２の走行用方向切換弁）、２２・・・別の油圧
ポンプ、３０・・・増速用方向切換弁、３１゜３２．３
３・・・管路、３４．３５・・・チェック弁、３７．３
９・・・ロンド、４０．４１・・・リンク、４２゜４６
．４７・・・ピン、４３．４５・・・長大。
６ ．２ ３
’４ １
］1 and 2 are explanatory diagrams showing a hydraulic excavator as an example of a hydraulic working machine to which the hydraulic circuit of the present invention is applied, in which FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 4 is a circuit diagram showing a hydraulic circuit of a conventional hydraulic working machine, FIG. 4 is a circuit diagram showing an embodiment of the hydraulic circuit of a hydraulic working machine of the present invention, and FIG. 5 is a circuit diagram showing another embodiment of the present invention. It is a diagram. 5...Left travel motor (first travel motor), 7...
Right travel motor (second travel motor), 14... First hydraulic pump, 15... Left travel direction switching valve (first travel direction switching valve), 17... Arm direction switching valve, 1
8... Second hydraulic pump, 21... Directional switching valve for right travel (second running directional switching valve), 22... Another hydraulic pump, 30... Directional switching valve for increasing speed , 31°32.3
3...Pipeline, 34.35...Check valve, 37.3
9...Rondo, 40.41...Link, 42°46
．． 47...pin, 43.45...long. 6. 2 3 '4 1 ]
Claims (1)
エータと、上記走行モータおよびアクチュエータに圧油
を供給する油圧ポンプ−と、この油圧ポンプに連絡され
、上記走行モータに供給される圧油の方向および流量を
制御する走行用方向切換弁と、上記油圧ポンプに連絡さ
れ、上記アクチュエータに供給される圧油の方向および
流量を制御するアクチュエータ用方向切換弁と、上記走
行モータおよびアクチュエータに増速用の圧油を供給可
能な別の油圧ポンプと、この別の油圧ポンプと上記走行
用方向切換弁とを、あるいは該別の油圧ポンプと上記ア
クチュエータ用方向切換弁とを選択的に連絡する増速用
方向切換弁とを備えた油圧作業機の油圧回路において、
上記走行用方向切換弁のスプールの最大位置付近に至る
動作と連動して増速用方向切換弁を、該別の油圧ポンプ
と該走行用方向切換弁とを連絡するように切換える切換
手段を設けたことを特徴とする油圧作業機の油圧回路。 ２ 走行モータが第１の走行モータおよび第２の走行モ
ータからなり、走行用方向切換弁が上記第１の走行モー
タに供給される圧油の方向および流量を制御する第１の
走行用方向切換弁と、上記第２の走行モータに供給され
る圧油の方向および流量を制御する第２の走行用方向切
換弁とからなり、増速用方向切換弁が別の油圧ポンプと
上記第１の走行用方向切換弁および第２の走行用方向切
換弁とを、または別の油圧ポンプとアクチュエータ用方
向切換弁とを選択的に連絡するようになっているととも
に、切換手段は上記の第１の走行用方向切換弁および第
２の走行用方向切換弁のそれぞれのスプール双方の最大
位置付近に至る動作に連動して、上記増速用方向切換弁
を、別の油圧ポンプと、該第１の走行用方向切換弁およ
び第２の走行用方向切換弁とを連絡するように切換える
ことを特徴とする実用新案登録請求の範囲第１項記載の
油圧作業機の油圧回路。 ３ 切換手段がリンク機構からなることを特徴とする実
用新案登録請求の範囲第２項記載の油圧作業機の油圧回
路。[Scope of Claim for Utility Model Registration] 1. A travel motor, an actuator different from the travel motor, a hydraulic pump that supplies pressure oil to the travel motor and the actuator, and a hydraulic pump that is connected to the hydraulic pump and supplies pressure oil to the travel motor. a travel direction switching valve that controls the direction and flow rate of the pressure oil supplied to the actuator; an actuator directional control valve that is connected to the hydraulic pump and controls the direction and flow rate of the pressure oil supplied to the actuator; and the travel motor. and select another hydraulic pump capable of supplying pressure oil for speed increase to the actuator, this other hydraulic pump and the above-mentioned travel directional control valve, or this other hydraulic pump and the above-mentioned actuator directional control valve. In the hydraulic circuit of a hydraulic working machine equipped with a speed increasing directional control valve that communicates with
A switching means is provided for switching the speed-increasing directional switching valve so that the other hydraulic pump and the running directional switching valve communicate with each other in conjunction with the movement of the spool of the traveling directional switching valve to near its maximum position. A hydraulic circuit for a hydraulic working machine characterized by: 2. The travel motor includes a first travel motor and a second travel motor, and the travel direction switching valve controls the direction and flow rate of pressure oil supplied to the first travel motor. and a second traveling directional switching valve that controls the direction and flow rate of pressure oil supplied to the second traveling motor, and the speed increasing directional switching valve is connected to another hydraulic pump and the first traveling motor. The driving directional switching valve and the second driving directional switching valve are selectively connected to each other, or another hydraulic pump and the actuator directional switching valve are selectively connected to each other, and the switching means is configured to selectively communicate with the above-mentioned first directional switching valve. In conjunction with the operation of both the spools of the traveling directional switching valve and the second traveling directional switching valve to near their maximum positions, the speed increasing directional switching valve is operated by another hydraulic pump and the first spool. A hydraulic circuit for a hydraulic working machine according to claim 1, wherein the traveling direction switching valve and the second traveling direction switching valve are switched so as to communicate with each other. 3. The hydraulic circuit for a hydraulic working machine according to claim 2, wherein the switching means comprises a link mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5017983U JPS59156961U (en) | 1983-04-06 | 1983-04-06 | Hydraulic circuit of hydraulic work equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5017983U JPS59156961U (en) | 1983-04-06 | 1983-04-06 | Hydraulic circuit of hydraulic work equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59156961U true JPS59156961U (en) | 1984-10-22 |
Family
ID=30180654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5017983U Pending JPS59156961U (en) | 1983-04-06 | 1983-04-06 | Hydraulic circuit of hydraulic work equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59156961U (en) |
-
1983
- 1983-04-06 JP JP5017983U patent/JPS59156961U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59156961U (en) | Hydraulic circuit of hydraulic work equipment | |
| JPS5923806Y2 (en) | Fluid pressure circuit of backhoe work vehicle | |
| JP2520653B2 (en) | Running control device for construction machinery | |
| JPS6096479U (en) | Hydraulic circuit of hydraulic machine with blade | |
| JPS60126553U (en) | Hydraulic circuits for civil engineering and construction machinery | |
| JPH0246417Y2 (en) | ||
| JPH0258412B2 (en) | ||
| JPH047412B2 (en) | ||
| JPH02116554U (en) | ||
| JPS6120901U (en) | Pump control circuit for cranes, etc. | |
| JPS60148366U (en) | Power shovel hydraulic circuit | |
| JPH01141207A (en) | Working vehicle | |
| JPS62170403U (en) | ||
| JPS5833569U (en) | Work vehicle hydraulic circuit | |
| JPH0183906U (en) | ||
| JPS6130703U (en) | Hydraulic supply system for work vehicles | |
| JPH0452288Y2 (en) | ||
| JPH0245321Y2 (en) | ||
| JPS59135957U (en) | construction machinery | |
| JPS6312209Y2 (en) | ||
| JPS5947771U (en) | Construction machinery hydraulic circuit | |
| JPS63119901U (en) | ||
| JPS60151957U (en) | Power shovel hydraulic circuit | |
| JPS6120902U (en) | Pump control circuit for cranes, etc. | |
| JPH03259003A (en) | Hydraulic circuit for working car |