JPS57157804A - Multi-valve construction - Google Patents

Multi-valve construction

Info

Publication number
JPS57157804A
JPS57157804A JP4371681A JP4371681A JPS57157804A JP S57157804 A JPS57157804 A JP S57157804A JP 4371681 A JP4371681 A JP 4371681A JP 4371681 A JP4371681 A JP 4371681A JP S57157804 A JPS57157804 A JP S57157804A
Authority
JP
Japan
Prior art keywords
valve
pump
carry over
neutral
valves
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
JP4371681A
Other languages
Japanese (ja)
Inventor
Shuho Iwata
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Toyo Kogyo Co 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 Mazda Motor Corp, Toyo Kogyo Co Ltd filed Critical Mazda Motor Corp
Priority to JP4371681A priority Critical patent/JPS57157804A/en
Publication of JPS57157804A publication Critical patent/JPS57157804A/en
Pending 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3127—Floating position connecting the working ports and the return line
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To parallelly connect all valves for a pump and perform pump unload action as neutral, when multi-valves are plurally connected and used. CONSTITUTION:Carry over inlet ports 9a, 9b, connected to carry over ports 10a, 7b at neutral, are formed in housings 2a, 2b. When all of valve bodies are in a neutral position, working fluid from a pump 7 is returned to a tank 5 through series connected carry over passages 15a, 15b, then an overload is never applied to a relief valve 16. Further even if one of the valve bodies 3a, 4a in a multi- valve 1a in the upstream side is operated, working fluid is supplied to the other multi-valve 1b from an inlet port 8b, then actuated 12b, 13b can be operated without a trouble.
JP4371681A 1981-03-25 1981-03-25 Multi-valve construction Pending JPS57157804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4371681A JPS57157804A (en) 1981-03-25 1981-03-25 Multi-valve construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4371681A JPS57157804A (en) 1981-03-25 1981-03-25 Multi-valve construction

Publications (1)

Publication Number Publication Date
JPS57157804A true JPS57157804A (en) 1982-09-29

Family

ID=12671521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4371681A Pending JPS57157804A (en) 1981-03-25 1981-03-25 Multi-valve construction

Country Status (1)

Country Link
JP (1) JPS57157804A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488401A (en) * 1981-06-25 1984-12-18 Zahnradfabrik Friedrichshafen, A.G. Hydraulic servo steering for vehicles
JPH0250577U (en) * 1988-09-30 1990-04-09

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488401A (en) * 1981-06-25 1984-12-18 Zahnradfabrik Friedrichshafen, A.G. Hydraulic servo steering for vehicles
JPH0250577U (en) * 1988-09-30 1990-04-09

Similar Documents

Publication Publication Date Title
SE9501794D0 (en) Hydraulic directional valve
GB2314057A (en) Hydraulic control arrangement
AU552257B2 (en) Electrohydraulic valve
GB858476A (en) Hydraulic control valve
ES2004556A6 (en) Pressure equalizing valve
JPS57157804A (en) Multi-valve construction
EP0067320A3 (en) Control apparatus for vehicle steering system
EP0416130A4 (en) Hydraulic valve capable of pressure compensation
KR900001936A (en) Hydraulic Backhoe Circuit
EP0774547A4 (en) Valve apparatus for preventing fall of working machine
SE8500569D0 (en) POST-PRESSURE-COMPENSATED UNITARY HYDRAULIC VALVE
US2935090A (en) Valve systems for pressure fluid circuits
IT1171521B (en) Pump control and relief valve
JPS57140434A (en) Oil-pressure circuit for oil-pressure shovel
JPS54156985A (en) Safety device of hydraulic circuit having a plurality of actuators
JPS588876A (en) Flow dividing valve
CA2181658A1 (en) Anchor torque controller for anchor installing machines
JPS6446001A (en) Hydraulic elevation control device for tractor and the like
EP0396760A4 (en) Operation valve device
JPS5620808A (en) Hydraulic pressure control system for single acting hydraulic cylinder
JPS5586907A (en) Three-pump hydraulic circuit for construction machinery or the like
JPS5740173A (en) Spool moving method for counter balance valve and device for the same
JPS5620803A (en) Hydraulic circuit
JPS5614670A (en) Logic valve
JPS5467861A (en) Oil pressure controller