JPS5452281A - Hydraulic positioning apparatus for working equipment - Google Patents
Hydraulic positioning apparatus for working equipmentInfo
- Publication number
- JPS5452281A JPS5452281A JP11917077A JP11917077A JPS5452281A JP S5452281 A JPS5452281 A JP S5452281A JP 11917077 A JP11917077 A JP 11917077A JP 11917077 A JP11917077 A JP 11917077A JP S5452281 A JPS5452281 A JP S5452281A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- positioning
- pulse
- change
- counter
- 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
- Fluid-Pressure Circuits (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
PURPOSE: To improve the workability of working equipment through free change of positioning speed thereof, while accomplishing an excellent positioning by promoting the uniformity of the positioning speed in a hydraulic positioning apparatus for the equipment.
CONSTITUTION: When the output of a subtracter 13 is positive a lifting valve 16 is actuated intermittently at a constant interval, while a lowering valve 17 is done so when the output is negative. The change in the revolution speed of an engine 3 is detected with a speed detector 20. A pulse counter 21 generates a constant signal during the counting operation until the pulse signal from the detector 20 reaches a specified number. The pulse signal from the counter 21 and a pulse signal from a signal generator 18 are inputted to an AND circuit 22 to actuate the ascending valve 16. Accordingly, regardless of the change in the revolution speed of the engine 3, a tilling apparatus 1 is driven to ascent at a constant speed. In addition, the count pulse number from the pulse counter 21 can be varied by a setting apparatus 21a, thus freely controlling the ascending speed of the apparatus 1
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11917077A JPS5452281A (en) | 1977-10-03 | 1977-10-03 | Hydraulic positioning apparatus for working equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11917077A JPS5452281A (en) | 1977-10-03 | 1977-10-03 | Hydraulic positioning apparatus for working equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5452281A true JPS5452281A (en) | 1979-04-24 |
Family
ID=14754636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11917077A Pending JPS5452281A (en) | 1977-10-03 | 1977-10-03 | Hydraulic positioning apparatus for working equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5452281A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61276004A (en) * | 1985-05-31 | 1986-12-06 | Iseki & Co Ltd | Flow control device for hydraulic cylinder in automatic control device |
JPS6388305A (en) * | 1986-09-30 | 1988-04-19 | Sumitomo Kenki Kk | Speed controller for hydraulic rotary member |
JPS63219902A (en) * | 1987-03-04 | 1988-09-13 | Kayaba Ind Co Ltd | Control device for hydraulic actuator |
-
1977
- 1977-10-03 JP JP11917077A patent/JPS5452281A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61276004A (en) * | 1985-05-31 | 1986-12-06 | Iseki & Co Ltd | Flow control device for hydraulic cylinder in automatic control device |
JPS6388305A (en) * | 1986-09-30 | 1988-04-19 | Sumitomo Kenki Kk | Speed controller for hydraulic rotary member |
JPS63219902A (en) * | 1987-03-04 | 1988-09-13 | Kayaba Ind Co Ltd | Control device for hydraulic actuator |
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