JPS57137702A - Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder - Google Patents

Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder

Info

Publication number
JPS57137702A
JPS57137702A JP2013681A JP2013681A JPS57137702A JP S57137702 A JPS57137702 A JP S57137702A JP 2013681 A JP2013681 A JP 2013681A JP 2013681 A JP2013681 A JP 2013681A JP S57137702 A JPS57137702 A JP S57137702A
Authority
JP
Japan
Prior art keywords
piston
change
over
sensing
hydraulic
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
Application number
JP2013681A
Other languages
Japanese (ja)
Other versions
JPS6233443B2 (en
Inventor
Matsuhisa Isobe
Masami Yoshida
Kenji Sakai
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP2013681A priority Critical patent/JPS57137702A/en
Publication of JPS57137702A publication Critical patent/JPS57137702A/en
Publication of JPS6233443B2 publication Critical patent/JPS6233443B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To enable to efficiently adjust piston stroke by a constitution wherein means for sensing the position of hydraulic piston and for increasing or decreasing the oil amount within a closed circuit through change-over valves operated in response to the output signal of said means for sensing the position of hydraulic piston are provided for controlling. CONSTITUTION:The means for sensing the position of hydraulic piston, each of the means of which consists of a magnet 13, reed switches 17 and 18 and the like, are provided in hydraulic pistons 12 and 33 respectively. Said sensing means is so constituted as to change-over the gate cylinder change-over valve 6 by sensing that a piston 12 or 33 reaches to its stroke end and to change-over the main hydraulic cylinder change- over valve 8 by interlocking with the change-over operation of the valve 6. Needle valves 23 and 24 are connected to a hydraulic piping 22, through which high pressure compressed oil is flowed in the closed circuit 21 by opening the needle valve 23 resulting in making the piston stroke longer or flowed out of the closed circuit 21 by opening the neelde valve 24 resulting in making the piston stroke shorter. In such a manner as mentioned above, automatic adjustment of length of piston stroke can be possible and as well as the retreat position of the piston can be kept at constant.
JP2013681A 1981-02-16 1981-02-16 Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder Granted JPS57137702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013681A JPS57137702A (en) 1981-02-16 1981-02-16 Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013681A JPS57137702A (en) 1981-02-16 1981-02-16 Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder

Publications (2)

Publication Number Publication Date
JPS57137702A true JPS57137702A (en) 1982-08-25
JPS6233443B2 JPS6233443B2 (en) 1987-07-21

Family

ID=12018711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013681A Granted JPS57137702A (en) 1981-02-16 1981-02-16 Automatic adjusting device of piston stroke of double row double-acting type hydraulic cylinder

Country Status (1)

Country Link
JP (1) JPS57137702A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063083U (en) * 1983-10-06 1985-05-02 日本電子株式会社 pump mechanism
JPS60256607A (en) * 1984-06-01 1985-12-18 Kobe Steel Ltd Oil hydraulic circuit of booster
JPS6252303U (en) * 1985-09-20 1987-04-01

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735175A (en) * 1980-08-06 1982-02-25 Niigata Eng Co Ltd Automatic adjustment unit for amount of closing oil for concrete pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735175A (en) * 1980-08-06 1982-02-25 Niigata Eng Co Ltd Automatic adjustment unit for amount of closing oil for concrete pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063083U (en) * 1983-10-06 1985-05-02 日本電子株式会社 pump mechanism
JPS60256607A (en) * 1984-06-01 1985-12-18 Kobe Steel Ltd Oil hydraulic circuit of booster
JPS6252303U (en) * 1985-09-20 1987-04-01

Also Published As

Publication number Publication date
JPS6233443B2 (en) 1987-07-21

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