JPH0399069U - - Google Patents
Info
- Publication number
- JPH0399069U JPH0399069U JP634690U JP634690U JPH0399069U JP H0399069 U JPH0399069 U JP H0399069U JP 634690 U JP634690 U JP 634690U JP 634690 U JP634690 U JP 634690U JP H0399069 U JPH0399069 U JP H0399069U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure oil
- arm
- hydraulic
- attachment
- 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
- 230000007935 neutral effect Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案の一実施例を示す油圧回路図、
第２図は従来例を示す油圧回路図である。
１１……第１の油圧ポンプ、１２……第２の油
圧ポンプ、２１Ｄ……アーム用バルブ（第１バ
ルブ）、２２Ｂ……アーム用バルブ（第２バル
ブ）、２２Ｄ……作業アタツチメント用バルブ（
第３バルブ）、３１……アーム油圧シリンダ、３
２……作業アタツチメント油圧モータ、４６……
外部配管、５１……アーム用パイロツトバルブ、
５２……作業アタツチメント用パイロツトバルブ
、５３……優先バルブ、１２０……コントロール
バルブ、ｌ５……第１バルブの圧油供給側管路、
ｌ６……第２バルブの圧油供給側管路、ｌ７……
アーム用合流管路、ｌ１１……第３バルブの圧油
供給側管路。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention;
FIG. 2 is a hydraulic circuit diagram showing a conventional example. 11...First hydraulic pump, 12...Second hydraulic pump, 21D...Arm valve (first valve), 22B...Arm valve (second valve), 22D...Work attachment valve (
3rd valve), 31... Arm hydraulic cylinder, 3
2... Working attachment hydraulic motor, 46...
External piping, 51...Pilot valve for arm,
52...Pilot valve for work attachment, 53...Priority valve, 120...Control valve, l5...Pressure oil supply side pipe of the first valve,
l6...Pressure oil supply side pipe of the second valve, l7...
Arm confluence pipe line, l11... pressure oil supply side pipe line for the third valve.
Claims (1)
通する中立位置、その圧油を遮断するイ位置およ
び通過させるロ位置に切り換えられる合流油制御
用第１バルブ；前記第２の油圧ポンプからアーム
油圧シリンダへ流れる圧油を制御するため中立位
置、イおよびロ位置に切り換えられるアーム制御
用第２バルブ；および作業アタツチメント油圧ア
クチユエータへ流れる圧油を制御するため中立位
置、イ位置およびロ位置に切り換えられる作業ア
タツチメント制御用第３バルブを内蔵するコント
ロールバルブと、 前記第１バルブがイ位置にあるときに前記第１
の油圧ポンプの吐出油を前記第２バルブの圧油供
給側に導くアーム用合流管路と、 前記第１バルブがロ位置にあるときにこの第１
バルブを通つて前記第１の油圧ポンプの吐出油を
前記第３バルブの圧油供給側に導く作業アタツチ
メント用合流管路と、 アーム油圧シリンダをダンプ側およびクラウド
側に操作するために前記第１および第２バルブを
イまたはロ位置に切り換えるアーム用パイロツト
バルブと、 作業アタツチメントアクチユエータを一方向側
および他方向側に操作するために前記第３バルブ
をイまたはロ位置に切り換えるとともに前記第１
バルブをロ位置に切り換える作業アタツチメント
用パイロツトバルブと、 アーム用パイロツトバルブと作業アタツチメン
ト用パイロツトバルブが複合操作されたとき、前
記アーム用パイロツトバルブがいずれに操作され
ても前記作業アタツチメント用パイロツトバルブ
からの圧油により前記第１バルブをロ位置に切り
換える優先弁とを具備することを特徴とする作業
機の油圧装置。[Claims for Utility Model Registration] First and second hydraulic pumps, a neutral position where the pressure oil from the first hydraulic pump is communicated to the tank, a position where the pressure oil is shut off, and a position where the pressure oil is passed through the tank. A first valve for controlling the confluence oil that is switched; a second valve for controlling the arm that is switched to a neutral position, A and B positions to control the pressure oil flowing from the second hydraulic pump to the arm hydraulic cylinder; and a work attachment hydraulic actuator. a control valve incorporating a third valve for controlling a working attachment that can be switched to a neutral position, an A position, and a B position to control the pressure oil flowing to the work attachment; and when the first valve is in the A position, the first
an arm confluence conduit that guides the discharge oil of the hydraulic pump to the pressure oil supply side of the second valve;
a working attachment confluence conduit for guiding the discharge oil of the first hydraulic pump to the pressure oil supply side of the third valve through a valve; and an arm pilot valve for switching the second valve to the A or B position, and switching the third valve to the A or B position for operating the work attachment actuator in one direction and the other direction. 1st
When the pilot valve for the work attachment that switches the valve to the ``low'' position, the pilot valve for the arm, and the pilot valve for the work attachment are operated in combination, no matter which way the pilot valve for the arm is operated, the A hydraulic system for a work machine, comprising: a priority valve that switches the first valve to a position O using pressure oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634690U JPH0735884Y2 (en) | 1990-01-26 | 1990-01-26 | Hydraulic system of work machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634690U JPH0735884Y2 (en) | 1990-01-26 | 1990-01-26 | Hydraulic system of work machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0399069U true JPH0399069U (en) | 1991-10-16 |
| JPH0735884Y2 JPH0735884Y2 (en) | 1995-08-16 |
Family
ID=31510022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP634690U Expired - Fee Related JPH0735884Y2 (en) | 1990-01-26 | 1990-01-26 | Hydraulic system of work machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0735884Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101428099B1 (en) * | 2008-11-19 | 2014-08-08 | 두산인프라코어 주식회사 | Hydraulic circuit for construction machinery |
-
1990
- 1990-01-26 JP JP634690U patent/JPH0735884Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0735884Y2 (en) | 1995-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |