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GB1324860A - Control system for hydraulic motor - Google Patents

Control system for hydraulic motor

Info

Publication number
GB1324860A
GB1324860A GB4066870A GB4066870A GB1324860A GB 1324860 A GB1324860 A GB 1324860A GB 4066870 A GB4066870 A GB 4066870A GB 4066870 A GB4066870 A GB 4066870A GB 1324860 A GB1324860 A GB 1324860A
Authority
GB
United Kingdom
Prior art keywords
line
motor
valve
movable member
flow passage
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
GB4066870A
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB1324860A publication Critical patent/GB1324860A/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
    • 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
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F16H61/444—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation by changing the number of pump or motor units in operation

Landscapes

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

Abstract

1324860 Hydraulic pressure system CATERPILLAR TRACTOR CO 24 Aug 1970 [29 Sept 1969] 40668/70 Heading F1P A pair of pumps 11, 12, e.g. on articulated earth moving equipment, for selectively driving a remote motor M at one of two speeds, each has its output 23, 31 connected via an orifice 63, 73 in a movable member 61, 71 of a pilot valve 14, and a pilot flow passage 19, 21, to an annular chamber 51, 52 in a main control valve 16 which has a spool 41 movable to connect one, 51, both, or neither chambers 51, 52 to a drain line 22. Each movable member 61, 71, when its pilot flow passage 19, 21 is'connected to drain line 22, moves upwardly to connect the associated pump outlet 23, 31 to a drain passage 27 via orifices 64, 76. When its pilot flow passage 19, 21 is closed, the movable member 61, 71 moves downwardly as shown, and the output of the associated pump 11, 12 is directed via line 33 to the motor M which has a single supply line and drain line. A by-pass 38 prevents cavitation in the motor during over-run, and the valve 14 has a pressurerelief valve 81. Additional pressure fluid may be supplied to the motor via a line 32.
GB4066870A 1969-09-29 1970-08-24 Control system for hydraulic motor Expired GB1324860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86162769A 1969-09-29 1969-09-29

Publications (1)

Publication Number Publication Date
GB1324860A true GB1324860A (en) 1973-07-25

Family

ID=25336317

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4066870A Expired GB1324860A (en) 1969-09-29 1970-08-24 Control system for hydraulic motor

Country Status (5)

Country Link
US (1) US3576104A (en)
DE (1) DE2047642A1 (en)
FR (1) FR2062805A5 (en)
GB (1) GB1324860A (en)
ZA (1) ZA705845B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811282A (en) * 1973-01-26 1974-05-21 Caterpillar Tractor Co Hydraulic control circuit for a reversible hydraulic motor
US3949783A (en) * 1974-12-24 1976-04-13 Allis-Chalmers Corporation Dual Pump draft control valve
US3948049A (en) * 1975-05-01 1976-04-06 Caterpillar Tractor Co. Dual motor hydrostatic drive system
US3978666A (en) * 1975-09-11 1976-09-07 Caterpillar Tractor Co. Vehicle speed control apparatus and method
US4199293A (en) * 1977-03-07 1980-04-22 Caterpillar Tractor Co. High pressure implement circuit for loader with slow and fast dump position

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2583197A (en) * 1946-05-15 1952-01-22 Euclid Road Machinery Co Two-speed power steering
US2852918A (en) * 1954-12-24 1958-09-23 New York Air Brake Co Hydraulic control circuit with unloading means
US3386344A (en) * 1966-09-30 1968-06-04 Caterpillar Tractor Co Self-loading scraper hydraulic circuit with diverter

Also Published As

Publication number Publication date
ZA705845B (en) 1971-04-28
DE2047642A1 (en) 1971-04-01
FR2062805A5 (en) 1971-06-25
US3576104A (en) 1971-04-27

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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