WO2004027293A1 - Actionneur hydraulique et bloc de transmission a changement de vitesse continu - Google Patents

Actionneur hydraulique et bloc de transmission a changement de vitesse continu Download PDF

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Publication number
WO2004027293A1
WO2004027293A1 PCT/GB2003/003326 GB0303326W WO2004027293A1 WO 2004027293 A1 WO2004027293 A1 WO 2004027293A1 GB 0303326 W GB0303326 W GB 0303326W WO 2004027293 A1 WO2004027293 A1 WO 2004027293A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston rod
cylinder
hydraulic actuator
piston
seal body
Prior art date
Application number
PCT/GB2003/003326
Other languages
English (en)
Inventor
Leslie Kendrick Robinson
Original Assignee
Torotrak (Development) Limited
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 Torotrak (Development) Limited filed Critical Torotrak (Development) Limited
Priority to AU2003248983A priority Critical patent/AU2003248983A1/en
Publication of WO2004027293A1 publication Critical patent/WO2004027293A1/fr

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
    • F16H61/66—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 specially adapted for continuously variable gearings
    • F16H61/664—Friction gearings
    • F16H61/6648—Friction gearings controlling of shifting being influenced by a signal derived from the engine and the main coupling
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3224—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip capable of accommodating changes in distances or misalignment between the surfaces, e.g. able to compensate for defaults of eccentricity or angular deviations
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/441—Free-space packings with floating ring

Definitions

  • the present invention relates to hydraulic actuators in general and has specific
  • toroidal cavity is defined. Within this cavity, and running upon the part-toroidal
  • At least one roller is at least one roller (more typically two or three rollers are
  • the roller serves to transfer drive from one race to the other and is
  • the roller is free to "precess" - i.e. to change its inclination relative to the races - and the variator geometry is such that as the roller
  • the hydraulic piston/cylinder arrangement is of double acting type, having working
  • piston rod emerges from the working chamber and to maintain the integrity of this
  • patent number 444086 disclose an arrangement using a flexible sealing gland which
  • piston rod is capable of angular displacement about a transverse axis and a seal against egress of fluid from the cylinder is formed where the piston
  • Fig. 1 is a simplified illustration of major components of a toroidal-race
  • Fig. 2 is a perspective, partly sectional view of parts of a first hydraulic
  • Fig. 3 is a partly sectional view of a piston road and seal anangement of a
  • Fig. 4 is a scrap sectional view of a piston for use in an actuator embodying
  • FIG. 5 is an exploded, perspective illustration of a further toroidal-race
  • Fig. 6 is a perspective illustration of a roller/actuator assembly of the Figure
  • the present invention is particularly applicable to toroidal-
  • a drive shaft 16 for rotation therewith and have respective part toroidal surfaces 18,
  • the output disc is journalled such as to be rotatable
  • rollers disposed in the toroidal cavities.
  • a single representative roller 28 is illustrated
  • the output disc to further parts of the transmission, typically an epicyclic mixer, as
  • roller/caniage combination As well as being capable of translational motion the
  • roller/carriage combination is able to rotate about an axis determined by the hydraulic
  • actuator 32 to change the "tilt angle" of the roller and to move the contacts between
  • the illustrated variator is of the type known in the art as "torque control”.
  • the hydraulic actuator 32 exerts a controlled force on the roller/carriage and for
  • the axis determined by the actuator 32 is angled to the plane perpendicular to the
  • the force from the actuator 32 is controlled by means of a hydraulic circuit (not shown).
  • FIG 1 represents the prior art and details of the required seal arrangement
  • a cylinder whose wall is seen at 200 receives a piston 202 rigidly coupled to
  • annular recess 206 A suitable piston seal will be described in more detail below.
  • the piston rod is
  • the actuator is of double acting type. That is the piston is urged in opposite
  • the cylinder 200 has a transverse end wall 218 with a centre
  • closure plate 226 is thus formed an inwardly open annular recess 227 within
  • the piston-rod seal arrangement comprises an annular seal body 228 located
  • sealing band 230 of generally "L" cross section providing sealing
  • sealing rings and the sealing band is not permitted to escape.
  • piston rod 204 emerges is less than the working area of the opposite piston face 244
  • Fig. 3 illustrates an alternative floating piston-rod-seal arrangement.
  • cylinder end wall is seen at 218, the closure plate at 226 and the piston rod at 204.
  • the piston-rod seal anangement here comprises a seal body 300 of "J" section
  • FIG. 4 illustrates one possible way of allowing for this
  • the wear ring 306 itself has an outwardly facing recess receiving at its base a sealing
  • the piston rod need not necessarily be coupled directly to the roller's
  • each piston is instead coupled to the mountings of a respective roller through a
  • roller / piston assemblies 506A-F each comprising a roller 508 mounted in a
  • caniage 510 coupled by a universal joint 512 (formed in this embodiment as a ball
  • lever 514 The lever is in each case pivotally mounted about
  • transverse bore 516 therein and pivotally coupled at 518 to a piston rod 520 of a
  • Each piston moves along a direction which is vertical in the drawing, but
  • levers cause the rollers to move along the required tangential paths in response.
  • seal anangement 526 is provided which is identical to the seal
  • the present invention is ideally suited to use in vanators, it is considered that it is also

Landscapes

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

Abstract

L'invention concerne un actionneur hydraulique à double action comprenant un joint à l'emplacement où émerge une tige (204) de piston allongée, à une extrémité du cylindre (200) de l'actionneur, et permettant le déplacement angulaire de la tige de piston autour d'un axe transversal. On utilise un système de joint comprenant un corps de joint (240) à travers lequel passe la tige du piston, et qui est placé entre les parois (218, 226) d'un logement (227) annulaire s'ouvrant sur l'intérieur, ce corps de joint étant capable de subir un mouvement radial de manière à accommoder le déplacement angulaire de la tige de piston. Ce corps du joint est pourvu d'une bande d'étanchéité (230) qui présente une première et une seconde surface d'étanchéité, lesquelles sont poussées de manière élastique contre la tige de piston et contre une des parois du logement annulaire, formant ainsi deux joints qui bloquent conjointement la sortie du fluide à une extrémité du cylindre.
PCT/GB2003/003326 2002-09-17 2003-07-31 Actionneur hydraulique et bloc de transmission a changement de vitesse continu WO2004027293A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003248983A AU2003248983A1 (en) 2002-09-17 2003-07-31 Hydraulic actuator and continuously variable ratio transmission unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0221484.9 2002-09-17
GB0221484A GB0221484D0 (en) 2002-09-17 2002-09-17 Hydraulic actuator and variator

Publications (1)

Publication Number Publication Date
WO2004027293A1 true WO2004027293A1 (fr) 2004-04-01

Family

ID=9944168

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/003326 WO2004027293A1 (fr) 2002-09-17 2003-07-31 Actionneur hydraulique et bloc de transmission a changement de vitesse continu

Country Status (3)

Country Link
AU (1) AU2003248983A1 (fr)
GB (1) GB0221484D0 (fr)
WO (1) WO2004027293A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004090382A1 (fr) * 2003-04-09 2004-10-21 Torotrak (Development) Ltd. Transmission par traction a roulement toroidal
WO2005017391A1 (fr) * 2003-08-15 2005-02-24 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Variateur et systeme de variateur
WO2006131778A1 (fr) * 2005-06-10 2006-12-14 International Innovations Limited Systeme de transmission a variation continue

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB781784A (en) * 1953-12-31 1957-08-28 Schweizerische Lokomotiv Improved control system for automotive vehicles driven by an internal combustion engine and a continuously adjustable ratio gear
US3889958A (en) * 1974-04-15 1975-06-17 Case Co J I Piston rod floating wiper
DE3042536A1 (de) * 1980-11-12 1982-06-16 Fichtel & Sachs Ag, 8720 Schweinfurt Dichtung fuer zylindrische teile
DE3600971A1 (de) * 1985-02-08 1987-07-16 Sachtler Filmtech Geraete Hoehenverstellbare saeule, insbesondere mittelsaeule fuer ein stativ zur aufnahme einer film- oder fernsehkamera
US5395292A (en) 1988-11-21 1995-03-07 Torotrak (Development) Limited Transmissions of the toroidal-race rolling-traction type

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB781784A (en) * 1953-12-31 1957-08-28 Schweizerische Lokomotiv Improved control system for automotive vehicles driven by an internal combustion engine and a continuously adjustable ratio gear
US3889958A (en) * 1974-04-15 1975-06-17 Case Co J I Piston rod floating wiper
DE3042536A1 (de) * 1980-11-12 1982-06-16 Fichtel & Sachs Ag, 8720 Schweinfurt Dichtung fuer zylindrische teile
DE3600971A1 (de) * 1985-02-08 1987-07-16 Sachtler Filmtech Geraete Hoehenverstellbare saeule, insbesondere mittelsaeule fuer ein stativ zur aufnahme einer film- oder fernsehkamera
US5395292A (en) 1988-11-21 1995-03-07 Torotrak (Development) Limited Transmissions of the toroidal-race rolling-traction type

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004090382A1 (fr) * 2003-04-09 2004-10-21 Torotrak (Development) Ltd. Transmission par traction a roulement toroidal
US9175758B2 (en) 2003-04-09 2015-11-03 Torotrak (Development) Limited Transmission of the toroidal race rolling traction type
WO2005017391A1 (fr) * 2003-08-15 2005-02-24 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Variateur et systeme de variateur
US7211023B2 (en) 2003-08-15 2007-05-01 Getrag Getriebe-Und Zahradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Variator and variator arrangement
WO2006131778A1 (fr) * 2005-06-10 2006-12-14 International Innovations Limited Systeme de transmission a variation continue

Also Published As

Publication number Publication date
GB0221484D0 (en) 2002-10-23
AU2003248983A1 (en) 2004-04-08

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