JPS5681741A - Locus controlling device of working tool such as oil pressure shovel - Google Patents
Locus controlling device of working tool such as oil pressure shovelInfo
- Publication number
- JPS5681741A JPS5681741A JP15809279A JP15809279A JPS5681741A JP S5681741 A JPS5681741 A JP S5681741A JP 15809279 A JP15809279 A JP 15809279A JP 15809279 A JP15809279 A JP 15809279A JP S5681741 A JPS5681741 A JP S5681741A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- signal
- boom
- valve
- flow rate
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
- E02F3/432—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like for keeping the bucket in a predetermined position or attitude
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
PURPOSE:To obtain the titled controlling device having an excellent responsibility by a method wherein a flow rate control valve installed between a rod contracting side chamber duct and a rod extruding side chamber duct of a boom cylinder is controlled by means of an operation system inputting a comparative position signal between an arm and a boom. CONSTITUTION:A switch 27 is turned ON and a boom 2 is optionally made to move upward or downward with an operation of a boom change-over valve 10. And the switch 27 is turned OFF and the valve 10 is placed in a neutral position and when an arm switching valve 9 is placed at an arm extruding position, the point of an arm 3 draws a locus A. Further, the switch 27 is turned ON, and the valve 10 is placed at the neutral position, and when the valve 9 is placed at an arm extruding position, an output of an operation system 26, namely, a control signal I enters a flow rate control a value 23, and an oil passing flow rate becomes a value corresponding to the signal I. And further, the oil in a rod extruding side chamber to a boom cylinder 5 flows with a flow rate corresponding to the signal I, and a part thereof flows in a rod contracting side chamber of the cylinder 5 and the residual flows into a tank 25. Accordingly, the cylinder 5 contracts with a speed corresponding to the signal I and the boom 2 moves downward with a speed corresponding to the signal I, thus, making the point of the arm 3 draw a required locus such as B-E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15809279A JPS5681741A (en) | 1979-12-07 | 1979-12-07 | Locus controlling device of working tool such as oil pressure shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15809279A JPS5681741A (en) | 1979-12-07 | 1979-12-07 | Locus controlling device of working tool such as oil pressure shovel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5681741A true JPS5681741A (en) | 1981-07-04 |
| JPS6252095B2 JPS6252095B2 (en) | 1987-11-04 |
Family
ID=15664115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15809279A Granted JPS5681741A (en) | 1979-12-07 | 1979-12-07 | Locus controlling device of working tool such as oil pressure shovel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5681741A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2817574A1 (en) * | 2000-12-04 | 2002-06-07 | Faucheux Ind Soc | FRONT LOADER FOR CARRIER |
| JP2013002634A (en) * | 2011-06-16 | 2013-01-07 | Caterpillar Inc | Lift system implementing feedfoward control based on velocity |
| WO2021066029A1 (en) * | 2019-10-03 | 2021-04-08 | 日立建機株式会社 | Construction machine |
-
1979
- 1979-12-07 JP JP15809279A patent/JPS5681741A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2817574A1 (en) * | 2000-12-04 | 2002-06-07 | Faucheux Ind Soc | FRONT LOADER FOR CARRIER |
| JP2013002634A (en) * | 2011-06-16 | 2013-01-07 | Caterpillar Inc | Lift system implementing feedfoward control based on velocity |
| WO2021066029A1 (en) * | 2019-10-03 | 2021-04-08 | 日立建機株式会社 | Construction machine |
| JP2021059855A (en) * | 2019-10-03 | 2021-04-15 | 日立建機株式会社 | Construction machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6252095B2 (en) | 1987-11-04 |
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