GB979062A - Improvements in or relating to a continuously variable ratio transmission - Google Patents

Improvements in or relating to a continuously variable ratio transmission

Info

Publication number
GB979062A
GB979062A GB1760660A GB1760660A GB979062A GB 979062 A GB979062 A GB 979062A GB 1760660 A GB1760660 A GB 1760660A GB 1760660 A GB1760660 A GB 1760660A GB 979062 A GB979062 A GB 979062A
Authority
GB
United Kingdom
Prior art keywords
roller
rollers
carriers
radially
rocker
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
GB1760660A
Inventor
Forbes George De Brie Perry
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1760660A priority Critical patent/GB979062A/en
Priority to FR862233A priority patent/FR1289325A/en
Publication of GB979062A publication Critical patent/GB979062A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Abstract

979,062. Variable - speed friction gear. NATIONAL RESEARCH DEVELOPMENT CORPORATION. May 18, 1961 [May 18, 1960], No. 17606/60, Heading F2D. Variable-speed friction gearing of the toric disc and precessional roller type is provided with means for equalizing the load between the rollers. As shown diagrammatically in Fig. 1 each roller 22 is rotatably mounted in a carrier 21 universally jointed at 18 to a cranked rocker 4 which is pivoted at 1 on a fixed reaction plate (not shown) and the free end of which engages a recess 10 in a common control member 13 which is rotatable to tilt all the carriers equally but which floats radially and is shifted radially by an overloaded roller to move this roller to a lower ratio position and the other rollers to higher ratio positions. The free ends 24 of the roller carriers 21 ride in sockets 25 anchored to the reaction plate. In a modification the ends 24 of the roller carriers are carried by rockers engaging a second radially floating control member which is used during reverse rotation of the transmission, the control member 13 being free from rotational restraint during reverse rotation. The precession of the rollers may be terminated by a screwing action, the universal joint 18 being formed by a ball disposed in a socket provided in the rocker and the roller carrier having a screw connection with the ball, alternatively the axis about which the roller carrier pivots may be at an angle to the plane of the torus centre circle. In the embodiment of Fig. 6 a roller carrier 440 has a screw connection with a pin 443 pivoted to a rocker 446 which has a ball-ended arm 450 engaging a notch 451 in a common radially floating non-rotatable member 452 which equalizes the load between the rollers. Tilting of the carriers 440 to vary the ratio is effected by angular adjustment of a common control ring 455 having notches 454 engaged by semi-circular webs 453 formed on the carriers. The invention may also be applied to a transmission of the type having two sets of rollers co-operating with two driving discs and a central driven disc having a toroidal track on each side. U.S.A. Specification 2,140,012 is referred to.
GB1760660A 1960-05-18 1960-05-18 Improvements in or relating to a continuously variable ratio transmission Expired GB979062A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1760660A GB979062A (en) 1960-05-18 1960-05-18 Improvements in or relating to a continuously variable ratio transmission
FR862233A FR1289325A (en) 1960-05-18 1961-05-18 Continuously variable gear ratio transmission mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1760660A GB979062A (en) 1960-05-18 1960-05-18 Improvements in or relating to a continuously variable ratio transmission

Publications (1)

Publication Number Publication Date
GB979062A true GB979062A (en) 1965-01-01

Family

ID=10098093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1760660A Expired GB979062A (en) 1960-05-18 1960-05-18 Improvements in or relating to a continuously variable ratio transmission

Country Status (2)

Country Link
FR (1) FR1289325A (en)
GB (1) GB979062A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1755840A1 (en) * 1967-06-30 1971-12-09 Nat Res Dev Power transmission device
US4297918A (en) * 1978-06-23 1981-11-03 National Research Development Corporation Control systems for steplessly-variable ratio transmissions
WO1990004729A1 (en) * 1988-10-27 1990-05-03 Perry Forbes G D Toroidal race rolling traction transmission units
WO1990011462A1 (en) * 1989-03-28 1990-10-04 Perry Forbes G D Continuously variable transmissions
WO1992011475A1 (en) * 1990-12-21 1992-07-09 Torotrak (Development) Limited Transmission of the toroidal-race rolling-traction type
US5423727A (en) * 1988-11-21 1995-06-13 Torotrak (Development) Limited Transmission of the toroidal-race rolling-traction type
WO1997040292A1 (en) * 1996-04-19 1997-10-30 Torotrak (Development) Limited Variator control system
US6030310A (en) * 1996-04-19 2000-02-29 Torotrak (Development) Limited Variator control system
US7632208B2 (en) 2002-01-24 2009-12-15 Torotrak (Development) Limited Continuously variable transmissions
US11078812B2 (en) 2015-07-13 2021-08-03 Borgwarner Inc. Continuously variable friction drive phaser

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1002479A (en) * 1963-05-07 1965-08-25 Nat Res Dev Improvements in or relating to a continuously variable ratio transmission
GB1026734A (en) * 1964-01-01 1966-04-20 Nat Res Dev Improvements in or relating to continuously variable ratio transmission units
GB1195205A (en) * 1966-09-12 1970-06-17 Nat Res Dev Improvements in or relating to Toroidal Race Transmission Units.

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1755840A1 (en) * 1967-06-30 1971-12-09 Nat Res Dev Power transmission device
US4297918A (en) * 1978-06-23 1981-11-03 National Research Development Corporation Control systems for steplessly-variable ratio transmissions
WO1990004729A1 (en) * 1988-10-27 1990-05-03 Perry Forbes G D Toroidal race rolling traction transmission units
US5111710A (en) * 1988-10-27 1992-05-12 Perry Forbes G Toroidal race rolling traction transmission units
US5423727A (en) * 1988-11-21 1995-06-13 Torotrak (Development) Limited Transmission of the toroidal-race rolling-traction type
WO1990011462A1 (en) * 1989-03-28 1990-10-04 Perry Forbes G D Continuously variable transmissions
GB2267133A (en) * 1990-12-21 1993-11-24 Torotrak Dev Ltd Transmission of the toroidal-race rolling-traction type
GB2267133B (en) * 1990-12-21 1994-05-11 Torotrak Dev Ltd Transmission of the toroidal-race rolling-traction type
WO1992011475A1 (en) * 1990-12-21 1992-07-09 Torotrak (Development) Limited Transmission of the toroidal-race rolling-traction type
WO1997040292A1 (en) * 1996-04-19 1997-10-30 Torotrak (Development) Limited Variator control system
US6030310A (en) * 1996-04-19 2000-02-29 Torotrak (Development) Limited Variator control system
US7632208B2 (en) 2002-01-24 2009-12-15 Torotrak (Development) Limited Continuously variable transmissions
US11078812B2 (en) 2015-07-13 2021-08-03 Borgwarner Inc. Continuously variable friction drive phaser

Also Published As

Publication number Publication date
FR1289325A (en) 1962-03-30

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