GB1413766A - Hydraulic control apparatus - Google Patents

Hydraulic control apparatus

Info

Publication number
GB1413766A
GB1413766A GB5573973A GB5573973A GB1413766A GB 1413766 A GB1413766 A GB 1413766A GB 5573973 A GB5573973 A GB 5573973A GB 5573973 A GB5573973 A GB 5573973A GB 1413766 A GB1413766 A GB 1413766A
Authority
GB
United Kingdom
Prior art keywords
valve
chamber
pump
side wall
pressure
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.)
Expired
Application number
GB5573973A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1413766A publication Critical patent/GB1413766A/en
Expired 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use 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
    • 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
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/275—Control of the prime mover, e.g. hydraulic control
    • 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
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30585—Assemblies of multiple valves having a single valve for multiple output members
    • 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
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/634—Electronic controllers using input signals representing a state of a 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • 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
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/911—Fluid motor system incorporating electrical system

Landscapes

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

Abstract

1413766 Hydraulic control circuits ROBERT BOSCH GmbH 30 Nov 1973 [4 Dec 1972] 55739/73 Heading F1P An hydraulic control circuit, Fig. 1, comprises valves 16, 17 which control rams 13, 12 and influence a control line 32 and a changeover valve 35 which is spring-loaded to a first position in which it connects a line 37 to a reservoir 47 and closes a supply line 31 and has an alternative position in which it connects the supply line 31 to the line 37. The circuit controls the raising and tilting of the side loading wall of a lorry. To tilt the wall outwards valve 17 is moved to position 25. The pump 45 is inoperative so no fluid flows through the control line and valve 35 is therefore in the position shown. Thus, chamber 54 of ram 12 is connected to the reservoir through ducts 56, 39, 21 and the weight of the wall causes outward tilting, forcing fluid out of chamber 51 and drawing it into chamber 54. If this does not happen, due to the lorry standing on a slope, after a delay a cam 27 operates a switch 28 and starts a motor 26 which operates the pump 45. Fluid flows through the control line 32 and the pressure drop caused by a throttle 33 operates the changeover valve 35. This supplies pressure fluid to chamber 54 of ram 12 and tilts the side wall. A pressure limiting valve 29 determines the pressure available. To tilt the side wall inwards the valve 17 is moved to position 24. Cam 27 starts the pump 45 and pressure fluid is delivered to chamber 51 of ram 12 to tilt the side wall. In this position the control line 32 is interrupted so valve 35 is in the position shown and fluid from chamber 54 returns to the reservoir. The hoisting ram 13 is controlled by the valve 16 in a similar way. Lowering is almost always due to the weight of the load but the pump 45 may be switched on if required. Fig. 2 shows a modification in which a pressure limiting valve 63 determines the lower pressure required for tilting the side wall outwards and lowering the load than for hoisting and tilting the side wall inwards. Fig. 3, (not shown), illustrates a circuit in which the changeover valve has three positions instead of two and a cam for controlling the pump.
GB5573973A 1972-12-04 1973-11-30 Hydraulic control apparatus Expired GB1413766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2259294A DE2259294C3 (en) 1972-12-04 1972-12-04 Hydraulic device for controlling a system with at least one consumer

Publications (1)

Publication Number Publication Date
GB1413766A true GB1413766A (en) 1975-11-12

Family

ID=5863459

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5573973A Expired GB1413766A (en) 1972-12-04 1973-11-30 Hydraulic control apparatus

Country Status (6)

Country Link
US (1) US3864913A (en)
JP (1) JPS4986774A (en)
DE (1) DE2259294C3 (en)
FR (1) FR2209052B1 (en)
GB (1) GB1413766A (en)
IT (1) IT1001973B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962871A (en) * 1975-04-30 1976-06-15 Towmotor Corporation Control means adjustably synchronizing operation of a single pump with a plurality of control valves
DE2601484C2 (en) * 1976-01-16 1984-07-26 Robert Bosch Gmbh, 7000 Stuttgart Control device for at least two hydraulic consumers fed by a pressure medium source
US4149565A (en) * 1977-02-02 1979-04-17 International Harvester Company Pilot controlled poppet valve assembly
DE2718641C2 (en) * 1977-04-27 1986-05-07 Mannesmann Rexroth GmbH, 8770 Lohr Control block with electrical switch-on and switch-off device for the hydraulic pump of electrically operated lifting vehicles
EP0316500B1 (en) * 1987-11-19 1991-04-17 Honeywell Lucifer Sa Control device for a piston located in a cylinder
US4881371A (en) * 1988-07-26 1989-11-21 Clark Equipment Company Auxiliary coupler pressure relief hydraulic system with pump drive ignition switch relief
DE10021744A1 (en) * 2000-05-04 2001-11-15 Festo Ag & Co Device for adjusting the differential pressure in a fluid cylinder
CN101614228B (en) * 2008-06-27 2012-01-04 扬州威奥重工机械有限公司 Hydraulic controlling system for mining concrete pump
CN103161780B (en) * 2013-03-20 2016-02-10 日照海卓液压有限公司 A kind of multiple directional control valve based on single-ended oil sources management system
CN104776080B (en) * 2015-04-08 2017-06-09 中联重科股份有限公司 Damping valve, hoisting system and engineering machinery

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3443483A (en) * 1966-05-06 1969-05-13 Int Harvester Co Pilot unloading hydraulic circuit
US3520231A (en) * 1968-10-23 1970-07-14 Gen Signal Corp Hydraulic supply systems with flow rate-limiting control
US3550505A (en) * 1969-05-07 1970-12-29 Gen Signal Corp Hydraulic system including two work circuits

Also Published As

Publication number Publication date
DE2259294A1 (en) 1974-06-06
DE2259294C3 (en) 1979-01-04
IT1001973B (en) 1976-04-30
US3864913A (en) 1975-02-11
JPS4986774A (en) 1974-08-20
FR2209052B1 (en) 1978-02-10
FR2209052A1 (en) 1974-06-28
DE2259294B2 (en) 1978-04-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee