JPH0226652U - - Google Patents
Info
- Publication number
- JPH0226652U JPH0226652U JP10455988U JP10455988U JPH0226652U JP H0226652 U JPH0226652 U JP H0226652U JP 10455988 U JP10455988 U JP 10455988U JP 10455988 U JP10455988 U JP 10455988U JP H0226652 U JPH0226652 U JP H0226652U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- hydraulic
- pilot
- regulating valve
- 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
- 230000001105 regulatory effect Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
Description
第１図ａはこの考案による作業機油圧回路の一
実施例、第１図ｂはすくい込み作業時の作業機油
圧供給流量を示すグラフ、第１図ｃはすくい込み
作業時のバケツト刃先軌跡を示すグラフ、第２図
はこの考案による別の実施例、第３図はシヨベル
ローダの全体概要図、第４図ａ，ｂ，ｃ，ｄは従
来の作業機油圧回路の一具体例とその問題点を説
明するためのグラフならびに説明図である。
１０，３０……油圧作業機操作装置、１１，３
１……電磁切換弁、１２……減圧弁、１３……パ
イロツト配管、１４……シヤツトル弁、２１……
バケツトレバー、２２……スイツチ。
Figure 1a shows an example of the work machine hydraulic circuit according to this invention, Figure 1b is a graph showing the work machine hydraulic pressure supply flow rate during scooping work, and Figure 1c shows the locus of the bucket tip during scooping work. 2 is another embodiment based on this invention, FIG. 3 is an overall schematic diagram of a shovel loader, and FIGS. 4 a, b, c, and d are a specific example of a conventional working machine hydraulic circuit and its problems. FIG. 2 is a graph and an explanatory diagram for explaining. 10,30...Hydraulic working machine operating device, 11,3
1... Solenoid switching valve, 12... Pressure reducing valve, 13... Pilot piping, 14... Shuttle valve, 21...
Bucket Trevor, 22...Switch.
Claims (1)
せる作業機用油圧装置であつて、油圧パイロツト
バルブのパイロツト圧力によつて作動する作業機
操作弁を備えた油圧回路において、パイロツト回
路の圧力を調圧する調圧弁と、該調圧弁を操作レ
バーに装着したスイツチによつて作動あるいは非
作動状態に切換える電磁切換弁とを備え、上記ス
イツチを操作したとき上記調圧弁がパイロツト回
路の圧油を減圧することによつて上記作業機操作
弁の最大吐出量を規制するようにしたことを特徴
とする油圧作業機操作装置。 This is a hydraulic system for work equipment that tilts, raises, and lowers a bucket cart using hydraulic pressure, and is equipped with a work equipment operation valve that is operated by the pilot pressure of a hydraulic pilot valve. The pressure regulating valve is provided with a pressure valve and an electromagnetic switching valve that switches the pressure regulating valve to an activated or non-operating state by a switch attached to an operating lever, and when the switch is operated, the pressure regulating valve reduces the pressure of the pressure oil in the pilot circuit. A hydraulic working machine operating device characterized in that the maximum discharge amount of the working machine operating valve is regulated.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10455988U JPH0226652U (en) | 1988-08-09 | 1988-08-09 | |
| US07/465,261 US5174190A (en) | 1988-08-02 | 1989-08-02 | Moving speed regulator for hydraulically driven work implement |
| PCT/JP1989/000798 WO1990001588A1 (en) | 1988-08-02 | 1989-08-02 | Moving speed regulator for hydraulically driven working machines |
| EP19890909042 EP0381778A4 (en) | 1988-08-02 | 1989-08-02 | Moving speed regulator for hydraulically driven working machines |
| KR1019900700689A KR900702150A (en) | 1988-08-02 | 1990-04-02 | Hydraulic speed control device |
| US07/996,191 US5320025A (en) | 1988-08-02 | 1992-12-23 | Moving speed regulator for hydraulically driven work implement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10455988U JPH0226652U (en) | 1988-08-09 | 1988-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226652U true JPH0226652U (en) | 1990-02-21 |
Family
ID=31336386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10455988U Pending JPH0226652U (en) | 1988-08-02 | 1988-08-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226652U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61294031A (en) * | 1985-06-19 | 1986-12-24 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for excavator |
-
1988
- 1988-08-09 JP JP10455988U patent/JPH0226652U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61294031A (en) * | 1985-06-19 | 1986-12-24 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for excavator |
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