GB1379213A - Hydromechanical transmissions - Google Patents

Hydromechanical transmissions

Info

Publication number
GB1379213A
GB1379213A GB3318573A GB3318573A GB1379213A GB 1379213 A GB1379213 A GB 1379213A GB 3318573 A GB3318573 A GB 3318573A GB 3318573 A GB3318573 A GB 3318573A GB 1379213 A GB1379213 A GB 1379213A
Authority
GB
United Kingdom
Prior art keywords
displacement
unit
shaft
speed
drive
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
GB3318573A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation 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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB1379213A publication Critical patent/GB1379213A/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
    • 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
    • F16H47/04—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths
    • F16H37/084—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths at least one power path being a continuously variable transmission, i.e. CVT
    • F16H2037/088—Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/10—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts
    • F16H2037/102—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing at both ends of intermediate shafts the input or output shaft of the transmission is connected or connectable to two or more differentials

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

1379213 Hydro-mechanical variable-speed gear GENERAL MOTORS CORP 12 July 1973 [9 Aug 1972] 33185/73 Heading F2D A transmission providing infinitely variable low and high range drives comprises co-axial input and output shafts 10, 12, planetary gearing arranged circumjacent the input shaft and comprising an input sun wheel 18, a pair of planetary output members 20, 26 connected by a carrier 24 with the output shaft, a first hydraulic drive member constituted by a sun wheel 28 connected by gearing 54, 56 with one shaft 62 of a variable-ratio hydraulic transmission comprising pump/motor units 66, 64 of variable, positive displacement, the shaft 62 being parallel to and radially displaced from the input shaft 10, a second hydraulic drive member constituted by a ring gear 22 connected by gearing 34, 36 with a second shaft 60 of the hydraulic transmission, the shafts 60, 62 being co-axially aligned, and a reaction member 30 operatively connected to a selectively engageable brake 38 of which a portion is disposed intermediate the planetary gearing and the hydraulic transmission. Low range is established when a fluidpressure operated clutch 58 is disengaged and the brake 38 is applied by a fluid-pressure actuator 42. Then, with the unit 66 at maximum displacement and the unit 64 at zero displacement, the sun 28 is held, whilst the ring gear 22 may rotate freely so that no drive is transmitted to the output shaft 12. As the displacement of the unit 64 is increased from zero to maximum the sun 28 is driven at increasing speed to drive the carrier 24, and the resistance to rotation of the ring gear 22 increases, whereby a splittorque drive is established to the output shaft, and when the unit 64 reaches maximum displacement, the speed of the output shaft is further increased by progressive reduction of the displacement of the unit 66. When this displacement reaches zero the unit 64 holds the ring gear 22 stationary so that the planets 26, which have the same number of teeth as the planets 20, rotate the sun 28 at the same speed as the input shaft. High range may then be established by engagement of the clutch 58 and release of the brake 38, whereafter further increase in output speed is obtainable by increase of displacement of the unit 66. Reverse drive in low range is obtainable by reverse adjustment of the displacement of the unit 64.
GB3318573A 1972-08-09 1973-07-12 Hydromechanical transmissions Expired GB1379213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27904272A 1972-08-09 1972-08-09

Publications (1)

Publication Number Publication Date
GB1379213A true GB1379213A (en) 1975-01-02

Family

ID=23067422

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3318573A Expired GB1379213A (en) 1972-08-09 1973-07-12 Hydromechanical transmissions

Country Status (1)

Country Link
GB (1) GB1379213A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177168A (en) * 1985-06-26 1987-01-14 Kubota Ltd Hydromechanical transmission
WO1998046912A1 (en) * 1997-04-16 1998-10-22 Ove Hammarstrand A power transmission system
US6595884B1 (en) * 2000-11-22 2003-07-22 The Timken Company Continuous variable transmission

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177168A (en) * 1985-06-26 1987-01-14 Kubota Ltd Hydromechanical transmission
GB2177168B (en) * 1985-06-26 1990-01-24 Kubota Ltd Hydro-mechanical power transmission for vehicles
WO1998046912A1 (en) * 1997-04-16 1998-10-22 Ove Hammarstrand A power transmission system
US6283883B1 (en) 1997-04-16 2001-09-04 Ove Hammarstrand Power transmission system
US6595884B1 (en) * 2000-11-22 2003-07-22 The Timken Company Continuous variable transmission

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee