GB945877A - Hydraulic apparatus - Google Patents

Hydraulic apparatus

Info

Publication number
GB945877A
GB945877A GB2787459A GB2787459A GB945877A GB 945877 A GB945877 A GB 945877A GB 2787459 A GB2787459 A GB 2787459A GB 2787459 A GB2787459 A GB 2787459A GB 945877 A GB945877 A GB 945877A
Authority
GB
United Kingdom
Prior art keywords
motors
vehicle
motor
clutches
clutch
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
GB2787459A
Inventor
Eric Hider Bowers
Oswald Thoma
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.)
Dowty Hydraulic Units Ltd
Original Assignee
Dowty Hydraulic Units 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 Dowty Hydraulic Units Ltd filed Critical Dowty Hydraulic Units Ltd
Priority to GB2787459A priority Critical patent/GB945877A/en
Priority to DED34008A priority patent/DE1161768B/en
Publication of GB945877A publication Critical patent/GB945877A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
    • B62D11/10—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears
    • B62D11/14—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source
    • B62D11/18—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied hydraulically
    • 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
    • F16H61/456—Control of the balance of torque or speed between pumps or motors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Motor Power Transmission Devices (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

945,877. Motor vehicles. DOWTY HYDRAULIC UNITS Ltd. Aug. 8, 1960 [Aug. 14, 1959; Sept. 21, 1959], Nos. 27874/59 and 32074/59. Heading B7H. [Also in Divisions E1 and F2] An hydrostatic power transmission for transmitting power from a source 1, such as the engine of an earth-scraping vehicle, to a load, such as the earth engaging wheels 2, 5, comprises a pair of positive-displacement motors 2A, 5A connected in parallel with a positive-displacement pump 6, a mechanical connection between each motor and the load, one of the mechanical connections including a disconnectable clutch, and a valve 9 controlling the hydraulic connection to the motor having the clutch, and pressure responsive means 23, 29 to cause the clutch to engage when the pressure to the motor having the clutch is high and to disengage when the pressure is low. In the embodiment described, the engine 1 drives a pair of reversible, variable-displacement pumps 6, 7, pump 6 driving motors 2A, 5A connected to wheels 2, 5, and pump 7 driving motors 3A, 4A connected to wheels 3, 4. One motor 4A, 5A of each pair has a disconnectable clutch and valves 9, 11 are provided in the hydraulic connections leading to those motors. When the scraper of the vehicle is in use, the valves 9, 11 are open and the clutches engaged so that all four motors drive the vehicle at low speed. When the bucket of the vehicle is full, the clutches are disengaged and the valves closed to drive the vehicle at high speed. A flow-divider such as described in Specification 886,022 may be interposed in the connections from each pump to its motors so that, when both motors of a circuit are in operation, the flow is divided proportionally between the motors to prevent one wheel or the other slipping. The circuits may be interconnected by restrictors or one-way valves 16, 17 so that fluid from one circuit may flow to the other in the event of different pressures occurring in the circuit. The clutches are of the unidirectional type and two clutches operative in opposite directions, so that the vehicle can be reversed, are provided for each motor 4A, 5A housed in a unit 18 connected by reduction gearing 19 to the wheel. The clutches may be operated by piston-and-cylinder devices 23, 24 and 28, 29 operated by the pressure in the connections 26, 27 leading to the motor. In an alternative arrangement, a single piston having the opposite ends of its cylinder joined to the connections 26, 27 operates the clutches. In another embodiment, the pairs of motors drive a single wheel. The vehicle is steered by a mechanism which controls the differential setting of the pumps 6, 7 and the pivoting of a framework carrying the front wheels.
GB2787459A 1959-08-14 1959-08-14 Hydraulic apparatus Expired GB945877A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2787459A GB945877A (en) 1959-08-14 1959-08-14 Hydraulic apparatus
DED34008A DE1161768B (en) 1959-08-14 1960-08-12 Hydrostatic drive, especially for the chassis of a motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2787459A GB945877A (en) 1959-08-14 1959-08-14 Hydraulic apparatus

Publications (1)

Publication Number Publication Date
GB945877A true GB945877A (en) 1964-01-08

Family

ID=10266686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2787459A Expired GB945877A (en) 1959-08-14 1959-08-14 Hydraulic apparatus

Country Status (2)

Country Link
DE (1) DE1161768B (en)
GB (1) GB945877A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092339A2 (en) * 1982-04-16 1983-10-26 Matthias Norbert Senger A vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011920A (en) * 1975-08-25 1977-03-15 Caterpillar Tractor Co. Synchronized vehicle fluid drive system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR389971A (en) * 1908-05-07 1908-09-23 Louis Renault Wheel drive mechanism for motor cars
FR419864A (en) * 1910-08-30 1911-01-17 Delaunay Belleville Sa Direct drive control device in hydraulic shifting applications
FR14174E (en) * 1910-08-30 1911-09-27 Delaunay Belleville Sa Direct drive control device in hydraulic shifting applications
DE421296C (en) * 1925-01-01 1925-11-09 Motorenfabrik Deutz Akt Ges Device for reducing idling friction in fluid gears consisting of pump and motor
DE583359C (en) * 1931-03-20 1933-09-01 Carl Oscar Josef Montelius Drive device for motor vehicles with several drive axles
US2446242A (en) * 1946-10-22 1948-08-03 Acrotorque Co Hydraulic drive control mechanism for vehicles
DE820694C (en) * 1949-12-14 1951-11-12 Kloeckner Humboldt Deutz Ag Caterpillar vehicle
DE923048C (en) * 1953-01-15 1955-01-31 Gewerk Eisenhuette Westfalia Chassis control, e.g. B. for a loading machine with hydraulic drive
FR1152139A (en) * 1955-03-10 1958-02-12 Ford France Hydraulic transmission device for motor vehicle
DE1020533B (en) * 1956-06-08 1957-12-05 Ver Westdeutsche Waggonfab Device for controlling the hydrostatic drive of vehicles, in particular forklift trucks

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092339A2 (en) * 1982-04-16 1983-10-26 Matthias Norbert Senger A vehicle
EP0092339A3 (en) * 1982-04-16 1984-05-09 Matthias Norbert Senger A vehicle

Also Published As

Publication number Publication date
DE1161768B (en) 1964-01-23

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