GB1341361A - Hydrostatic drive system - Google Patents

Hydrostatic drive system

Info

Publication number
GB1341361A
GB1341361A GB1341361DA GB1341361A GB 1341361 A GB1341361 A GB 1341361A GB 1341361D A GB1341361D A GB 1341361DA GB 1341361 A GB1341361 A GB 1341361A
Authority
GB
United Kingdom
Prior art keywords
displacement
motor
pump
pedal
operated
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
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.)
CMI Terex Corp
Original Assignee
CMI Corp
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 CMI Corp filed Critical CMI Corp
Publication of GB1341361A publication Critical patent/GB1341361A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/437—Pump capacity control by mechanical control means, e.g. by levers or pedals
    • 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • 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
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/465—Automatic regulation in accordance with output requirements for achieving a target input speed
    • 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
    • F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
    • F16H2047/025—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the fluid gearing comprising a plurality of pumps or motors
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/04—Ratio selector apparatus
    • F16H59/06—Ratio selector apparatus the ratio being infinitely variable
    • F16H2059/065—Inching pedals for setting the ratio of an hydrostatic transmission
    • 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
    • F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type

Abstract

1341361 Vehicle transmission CMI CORP 13 Jan 1972 1681/72 Heading B7H [Also in Division F2] A vehicle, for use in road construction equipment is powered by an engine 24 driving the variable displacement pump 26 of a hydrostatic transmission also having a variable displacement motor 38 and a fixed displacement motor 40 these driving the wheels 16 of the vehicle via gearing, a shaft 100 and chains. The embodiment shown has two such transmissions, controlled electrically by circuitry 224 (Fig. 9, not shown). A pedal 264 for control of the transmissions is shown in Fig. 8 and comprises potentiometers 302, 304 operated in turn as contacts 306 and 308 respectively move along them when pedal 264 is depressed to move the linkage. The voltage on the brushes is used to adjust pump and motor displacements. A mechanical pedal operated control for the vehicle with one transmission only is shown in Fig. 4, two cam discs (one, 114, is shown) rotating due to a crank 110 operated by the pedal firstly adjusting pump displacement (by member 32) and then motor displacement. A yet further pedal is also described (Fig. 13, not shown) wherein a first, toe operated, bar is depressed to alter pump displacement for forward drive and a second, heel operated, bar, alters pump displacement for reverse drive both bars operating a common lever having cable connections to the pump and motor. It is also possible to have separate controls (Fig. 12, not shown), separate foot pedals for forward and reverse and levers for control of a two-speed gearing which may optionally be included in the driveline, the motor displacement and the engine governor (engine speed normally being constant during operation).
GB1341361D 1972-01-13 1972-01-13 Hydrostatic drive system Expired GB1341361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB168172 1972-01-13

Publications (1)

Publication Number Publication Date
GB1341361A true GB1341361A (en) 1973-12-19

Family

ID=9726176

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1341361D Expired GB1341361A (en) 1972-01-13 1972-01-13 Hydrostatic drive system

Country Status (1)

Country Link
GB (1) GB1341361A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219845A (en) * 1988-06-14 1989-12-20 Hiroshi Sato Parallel drive hydraulic motor system
EP0360132A1 (en) * 1988-09-17 1990-03-28 Deere & Company Control device for changing a vehicle transmission
US5048638A (en) * 1988-09-17 1991-09-17 Deere & Company System for controlling the ground speed and direction of travel of an off-road vehicle
EP1325833A2 (en) * 1999-05-21 2003-07-09 Bosch Rexroth AG Hydrostatic drive

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219845A (en) * 1988-06-14 1989-12-20 Hiroshi Sato Parallel drive hydraulic motor system
EP0360132A1 (en) * 1988-09-17 1990-03-28 Deere & Company Control device for changing a vehicle transmission
US5048638A (en) * 1988-09-17 1991-09-17 Deere & Company System for controlling the ground speed and direction of travel of an off-road vehicle
EP1325833A2 (en) * 1999-05-21 2003-07-09 Bosch Rexroth AG Hydrostatic drive
EP1325833A3 (en) * 1999-05-21 2007-03-14 Bosch Rexroth AG Hydrostatic drive

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees