WO2019012078A1 - Système de transmission - Google Patents

Système de transmission Download PDF

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Publication number
WO2019012078A1
WO2019012078A1 PCT/EP2018/069028 EP2018069028W WO2019012078A1 WO 2019012078 A1 WO2019012078 A1 WO 2019012078A1 EP 2018069028 W EP2018069028 W EP 2018069028W WO 2019012078 A1 WO2019012078 A1 WO 2019012078A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
pair
rollers
rings
pairs
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.)
Ceased
Application number
PCT/EP2018/069028
Other languages
English (en)
Inventor
Alexy BIKMUKHAMETOV
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.)
Arrival UK Ltd
Original Assignee
Arrival 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 Arrival Ltd filed Critical Arrival Ltd
Priority to EP18742983.2A priority Critical patent/EP3652465A1/fr
Publication of WO2019012078A1 publication Critical patent/WO2019012078A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F16H15/48—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members with members having orbital motion
    • F16H15/56—Gearings providing a discontinuous or stepped range of gear ratios
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0039—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising three forward speeds
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/201—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with three sets of orbital gears
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2038—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with three engaging means
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2071—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes using three freewheel mechanism

Definitions

  • Conventional transmission systems use toothed gears to transfer drive between an input and output shaft.
  • the gear ratio is set by the number of teeth of the geared components, allowing the design of the transmission to be adapted to either step up or step down an output rotational velocity and a torque with respect to an input.
  • the transmission may further comprise a layshaft that extends along the common axis within the ring pairs, the layshaft being configured to selectively engage the inner ring of the second ring pair and, when dependent on claim 2, the inner rings of the additional ring pairs.
  • the outer ring of the first ring pair may be fixed and form part of a transmission housing.
  • the layshaft may be rotatably mounted to the transmission housing.
  • the plurality of rollers may be held in a roller cage to maintain the separation of said rollers.
  • Figure 2 shows another transmission system in section taken along its axis
  • FIG. 1 An example of a planetary transmission system 1 is shown in Fig. 1.
  • the transmission system 1 comprises two pairs of rings.
  • a first pair of rings 2, which comprise an outer ring 3 and an inner ring 4 are arranged coaxially and have an inner surface 5 and an outer surface 6 respectively which are spaced apart to accommodate a set of rollers 7.
  • the rollers 7 are spaced evenly about a pitch circle between the outer and inner rings 3, 4 and are tightly pressed thereto so that rotation of one of the outer or the inner ring 3, 4 causes the rollers 7 to rotate about the other of the outer or inner rings 3, 4 which are held stationary.
  • the outer ring 3 may be held stationary and the inner ring 4 rotatable, so that when the inner ring 4 is rotated its rotation drives the rollers 7 about the inner surface 5 of the outer ring 3.
  • rollers comprise a further stepped portion 13 which will herein be referred to as a second stepped portion 13, the above mentioned stepped portion 8 being referred to as a first stepped portion 8.
  • the second stepped portion 13 extends from the first stepped portion 8 along the roller's axes into contact with a second pair of driven rings 14.
  • the second stepped portion 13 has a diameter less than the first stepped portion 8 to offer an even lower gear ratio.
  • the diameter of the second step portion 13 may be greater than the diameter of the first stepped portion, or the radius of the rollers 7 accommodated between the first pair of rings 2, in order to provide an increased gear ratio.
  • the gear ratio delivered by the inner ring 16 of the second pair of driven rings 14 will be a reduction over the gear ratio of the inner ring 10 of the first pair of driven rings 9.
  • the pawl 19 engaging the inner ring 10 of the first pair of driven rings 9 is disengaged and the pawl 19 corresponding to the inner ring 16 of the second pair of driven rings 14 is engaged.
  • the transmission system 1 may further comprise a housing 20 in which the driven rings 9, 14, 15 and first pair of rings 2 are enclosed.
  • the inner ring 4 of the first pair of rings 2 may be connected to an input shaft (not shown) that extends along the common axis A-A from out of the housing opposite to the end wall 21.
  • a facing plate (not shown) may be added to enclose the transmission system 1 within the housing 20 and protect it from dirt.
  • the input shaft is rotated to transfer drive to the layshaft via the first pair of rings 2 and the driven rings 9, 14, 15 as described above.
  • the input shaft may be connected to the inner ring 4 of the first ring pair 2 by a spline, key way or similar mechanical coupling known to those skilled in the art.
  • the rollers 7 can be lightened by removing a central section of each of the rollers to form hollow tubes. It shall be appreciated that an advantage of the above examples is that no lubrication is required and, in fact, is undesirable as the rollers must be frictionally engaged with the ring pairs. This reduces the maintenance schedule of the transmission system compared to conventionally geared transmission systems which require, from time to time, the lubricant to be changed.

Landscapes

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

Abstract

Une transmission à rouleaux planétaires comprend au moins deux paires de bagues, une première paire de bagues et une seconde paire de bagues, chaque paire de bagues est alignée sur un axe commun, chaque paire de bagues comprenant une bague extérieure et une bague intérieure espacées radialement pour recevoir une pluralité de rouleaux, la pluralité de rouleaux étant agencés sur un cercle primitif entre lesdites paires de bagues pour venir en prise par frottement avec les bagues externes et internes et relier les paires de bagues l'une à l'autre, les rouleaux comprenant une première partie disposée entre la première paire de bagues et une seconde partie disposée entre la seconde paire de bagues, les première et seconde parties de rouleau ayant des diamètres sensiblement différents, la bague interne ou externe de la première paire de bagues étant fixée, l'autre des première ou seconde bagues de la première paire de bagues étant libre de tourner, de telle sorte que la rotation de la bague librement rotative amène les rouleaux à tourner autour de la bague fixe et par conséquent transfère un entraînement vers la bague externe et interne de la seconde paire de bagues.
PCT/EP2018/069028 2017-07-14 2018-07-12 Système de transmission Ceased WO2019012078A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18742983.2A EP3652465A1 (fr) 2017-07-14 2018-07-12 Système de transmission

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2017125286 2017-07-14
RU2017125286 2017-07-14

Publications (1)

Publication Number Publication Date
WO2019012078A1 true WO2019012078A1 (fr) 2019-01-17

Family

ID=62976042

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/069028 Ceased WO2019012078A1 (fr) 2017-07-14 2018-07-12 Système de transmission

Country Status (2)

Country Link
EP (1) EP3652465A1 (fr)
WO (1) WO2019012078A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5364881U (fr) * 1976-10-29 1978-05-31
EP0713284A1 (fr) * 1994-06-03 1996-05-22 Sony Corporation Moteur avec reducteur
WO2005071287A1 (fr) * 2004-01-22 2005-08-04 Rotrex A/S Train planetaire multietage
EP2586694A1 (fr) * 2010-06-23 2013-05-01 NTN Corporation Bicyclette à assistance électrique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE358444A (fr) * 1929-02-25 1929-03-30 Systeme d'engrenages applicable en particulier aux vehicules automobiles
JPS4978676U (fr) * 1972-10-30 1974-07-08
JPH10205588A (ja) * 1997-01-22 1998-08-04 Mitsubishi Heavy Ind Ltd 増減速装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5364881U (fr) * 1976-10-29 1978-05-31
EP0713284A1 (fr) * 1994-06-03 1996-05-22 Sony Corporation Moteur avec reducteur
WO2005071287A1 (fr) * 2004-01-22 2005-08-04 Rotrex A/S Train planetaire multietage
EP2586694A1 (fr) * 2010-06-23 2013-05-01 NTN Corporation Bicyclette à assistance électrique

Also Published As

Publication number Publication date
EP3652465A1 (fr) 2020-05-20

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