GB1268641A - Improvements in or relating to variable gears - Google Patents

Improvements in or relating to variable gears

Info

Publication number
GB1268641A
GB1268641A GB4645568A GB4645568A GB1268641A GB 1268641 A GB1268641 A GB 1268641A GB 4645568 A GB4645568 A GB 4645568A GB 4645568 A GB4645568 A GB 4645568A GB 1268641 A GB1268641 A GB 1268641A
Authority
GB
United Kingdom
Prior art keywords
gear
input
variable
race
toric
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
GB4645568A
Inventor
Randle Leslie Abbott
Paul Clifford Green
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.)
GKN Birfield Transmissions Ltd
GKN Automotive Ltd
Original Assignee
GKN Transmissions Ltd
GKN Birfield Transmissions 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 GKN Transmissions Ltd, GKN Birfield Transmissions Ltd filed Critical GKN Transmissions Ltd
Priority to US840413A priority Critical patent/US3620101A/en
Priority to DE19691935762 priority patent/DE1935762A1/en
Priority to NL6910923A priority patent/NL6910923A/xx
Priority to FR6924264A priority patent/FR2013075A1/fr
Publication of GB1268641A publication Critical patent/GB1268641A/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
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • 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
    • F16H13/00—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members
    • F16H13/10—Means for influencing the pressure between the members
    • 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
    • F16H37/086—CVT using two coaxial friction members cooperating with at least one intermediate friction member
    • 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
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • F16H2015/386—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces with two or more sets of toroid gearings arranged in series

Landscapes

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

Abstract

1,268,641. Variable-speed gear. G.K.N. BIRFIELD TRANSMISSIONS Ltd. 4 July, 1969 [16 July, 1968; 1 Oct., 1968], Nos. 33755/68 and 46455/68. Heading F2D. The input race 64 of a steplessly-variable toric race friction gear, having a single set of tiltable non-planetary rollers 103, is driven from the input shaft 58 through a non-variable toothed or friction gear 56, which changes the input speed in sign and magnitude, whilst its output toric race 69 forms one input of a second non-variable torque-splitting planetary gear 72, having a final output element 53 and a second input element 79, driven by the input toric race 64 through an intermediate shaft 65. The overall range of the gear, used on a motor vehicle, provides output at reduced reverse; a geared neutral with the two inputs to the second non- variable gear cancelling each other; and reduced and overdrive forward ratios. There is also a positive neutral, parklock, and common hydraulic end loading for traction pressure. In Fig. 1, the input toric race 64 is driven at increased reverse speed through toothed wheels 61 in a permanently fixed carrier 60, and meshing external teeth 63 in input toric race 64 and internal teeth 57 in a ring gear fast with the input shaft 58. The non-variable output gear 72 comprises planetary balls 74 in an output carrier 75, contacting the back of the output toric race 69 and an assembly 79 splined to the intermediate shaft 65 to which is also splined the input toric race 71, the assembly 79 enclosing a dowelled piston 82 for hydraulic end-loading contained within abutments 65a, 68 on the intermediate shaft 65. A spring 87 in the assembly 79 provides initial end-loading for a push start. A clutch sleeve 78, splined to the final output member 53 clutches the ball-carrier 75 for reverse, geared neutral, and forward drives; releases it for positive neutral, and clutches casing teeth 91 for parklock. In Fig. 2, not shown, the input gear has friction rollers (123) on fixed axial spindles, and the output gear is another toric race gear with friction planetary rollers non-variably inclined in a carrier (147) splined to the final output shaft (116). The input face of the variable toric gear forms the piston and cylinder assembly for spring and hydraulic end-loading. The friction contacts transmit drive by oilfilm shear.
GB4645568A 1968-07-16 1968-07-16 Improvements in or relating to variable gears Expired GB1268641A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US840413A US3620101A (en) 1968-07-16 1969-07-09 Variable gears
DE19691935762 DE1935762A1 (en) 1968-07-16 1969-07-14 Infinitely variable friction gear
NL6910923A NL6910923A (en) 1968-07-16 1969-07-16
FR6924264A FR2013075A1 (en) 1968-07-16 1969-07-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3375568 1968-07-16

Publications (1)

Publication Number Publication Date
GB1268641A true GB1268641A (en) 1972-03-29

Family

ID=10357026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4645568A Expired GB1268641A (en) 1968-07-16 1968-07-16 Improvements in or relating to variable gears

Country Status (1)

Country Link
GB (1) GB1268641A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229986A (en) * 1976-08-14 1980-10-28 Lucas Industries Limited Axial loading device
DE3801597A1 (en) * 1988-01-21 1989-08-03 Rohs Ulrich Manual transmission arrangement on a double wobble-plate friction transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229986A (en) * 1976-08-14 1980-10-28 Lucas Industries Limited Axial loading device
DE3801597A1 (en) * 1988-01-21 1989-08-03 Rohs Ulrich Manual transmission arrangement on a double wobble-plate friction transmission

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