JPS5452281A - Hydraulic positioning apparatus for working equipment - Google Patents

Hydraulic positioning apparatus for working equipment

Info

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
Application number
JP11917077A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Katayama
Katsumi Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP11917077A priority Critical patent/JPS5452281A/en
Publication of JPS5452281A publication Critical patent/JPS5452281A/en
Pending legal-status Critical Current

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
JP11917077A 1977-10-03 1977-10-03 Hydraulic positioning apparatus for working equipment Pending JPS5452281A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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