JPH0426262U - - Google Patents
Info
- Publication number
- JPH0426262U JPH0426262U JP6535090U JP6535090U JPH0426262U JP H0426262 U JPH0426262 U JP H0426262U JP 6535090 U JP6535090 U JP 6535090U JP 6535090 U JP6535090 U JP 6535090U JP H0426262 U JPH0426262 U JP H0426262U
- Authority
- JP
- Japan
- Prior art keywords
- swash plate
- pressure
- machine
- work mode
- hydraulic pump
- 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
- 238000010276 construction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Description
図面は本考案に係る建設機械の作業機油圧回路
制御装置の実施例の構成を概念的に示す図である
。
１……エンジン、２……可変容量型油圧ポンプ
、３……斜板傾転用サーボシリンダ、４……パイ
ロツト用油圧ポンプ、５，６，７……手動操作弁
、８，９，１０……油圧シリンダ、１１……可変
型リリーフ弁、１２……パイロツト用通路、１３
……吊りモード切換用電気スイツチ、１４……電
気ケーブル、１５……切換弁。
The drawing is a diagram conceptually showing the configuration of an embodiment of a working machine hydraulic circuit control device for construction machinery according to the present invention. 1...Engine, 2...Variable capacity hydraulic pump, 3...Swash plate tilting servo cylinder, 4...Pilot hydraulic pump, 5, 6, 7...Manual operation valve, 8, 9, 10... Hydraulic cylinder, 11... Variable relief valve, 12... Pilot passage, 13
...Electric switch for changing suspension mode, 14...Electric cable, 15...Switching valve.
Claims (1)
圧油を作業機油圧回路を介して作業機に供給して
、該作業機を駆動する建設機械において、 前記作業機油圧回路内の圧力を高、低２段階に
可変設定する可変型リリーフ弁と、 前記油圧ポンプの斜板傾転角を可変する斜板角
可変手段と、 前記建設機械が行う吊り作業モードを設定する
吊り作業モード設定スイツチと、 前記吊り作業モード設定スイツチによつて吊り
作業モードが設定された場合に、前記作業機油圧
回路内の圧力が高圧側になるように前記可変型リ
リーフ弁の設定リリーフ圧を可変するとともに、
前記油圧ポンプの吐出圧油を流量が小さくなるよ
うに前記斜板角可変手段を制御する手段と を具えたことを特徴とする建設機械の作業機油圧
回路制御装置。[Scope of Claim for Utility Model Registration] A construction machine that drives a work machine by supplying pressure oil discharged from a hydraulic pump driven by an engine to the work machine via a work machine hydraulic circuit, A variable relief valve that variably sets the pressure in the circuit to two levels, high and low; A swash plate angle variable means that varies the swash plate tilt angle of the hydraulic pump; and A swash plate angle variable means that sets a lifting work mode to be performed by the construction machine. a lifting work mode setting switch; and a set relief pressure of the variable relief valve so that when the lifting work mode is set by the lifting work mode setting switch, the pressure in the working machine hydraulic circuit is on the high pressure side. In addition to varying
A working machine hydraulic circuit control device for construction machinery, comprising means for controlling the swash plate angle variable means so that the flow rate of pressure oil discharged from the hydraulic pump is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6535090U JPH0426262U (en) | 1990-06-20 | 1990-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6535090U JPH0426262U (en) | 1990-06-20 | 1990-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0426262U true JPH0426262U (en) | 1992-03-02 |
Family
ID=31597101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6535090U Pending JPH0426262U (en) | 1990-06-20 | 1990-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0426262U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040071537A (en) * | 2003-02-06 | 2004-08-12 | 주식회사수산중공업 | hydraulic control system and method of hydraulic equipment |
| KR100807923B1 (en) * | 2000-10-03 | 2008-02-27 | 가부시키가이샤 고마쓰 세이사쿠쇼 | Speed controller for work vehicle and its control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62224702A (en) * | 1986-03-26 | 1987-10-02 | Yutani Heavy Ind Ltd | Variably operating system for hydraulic actuator |
| JPH02128026A (en) * | 1988-11-07 | 1990-05-16 | Hitachi Constr Mach Co Ltd | Hydraulic circuit of hydraulic system excavator |
-
1990
- 1990-06-20 JP JP6535090U patent/JPH0426262U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62224702A (en) * | 1986-03-26 | 1987-10-02 | Yutani Heavy Ind Ltd | Variably operating system for hydraulic actuator |
| JPH02128026A (en) * | 1988-11-07 | 1990-05-16 | Hitachi Constr Mach Co Ltd | Hydraulic circuit of hydraulic system excavator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100807923B1 (en) * | 2000-10-03 | 2008-02-27 | 가부시키가이샤 고마쓰 세이사쿠쇼 | Speed controller for work vehicle and its control method |
| KR20040071537A (en) * | 2003-02-06 | 2004-08-12 | 주식회사수산중공업 | hydraulic control system and method of hydraulic equipment |
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