EP2002158A1 - Paire de poulies coniques pour transmission a courroie enroulee sur poulies coniques - Google Patents

Paire de poulies coniques pour transmission a courroie enroulee sur poulies coniques

Info

Publication number
EP2002158A1
EP2002158A1 EP07721977A EP07721977A EP2002158A1 EP 2002158 A1 EP2002158 A1 EP 2002158A1 EP 07721977 A EP07721977 A EP 07721977A EP 07721977 A EP07721977 A EP 07721977A EP 2002158 A1 EP2002158 A1 EP 2002158A1
Authority
EP
European Patent Office
Prior art keywords
arms
shaft
support ring
sensing piston
teeth
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.)
Withdrawn
Application number
EP07721977A
Other languages
German (de)
English (en)
Inventor
Hartmut Faust
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.)
Schaeffler Buehl Verwaltungs GmbH
LuK Lamellen und Kupplungsbau GmbH
Original Assignee
LuK Lamellen und Kupplungsbau Beteiligungs KG
LuK Lamellen und Kupplungsbau GmbH
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 LuK Lamellen und Kupplungsbau Beteiligungs KG, LuK Lamellen und Kupplungsbau GmbH filed Critical LuK Lamellen und Kupplungsbau Beteiligungs KG
Publication of EP2002158A1 publication Critical patent/EP2002158A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F16H61/662—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 with endless flexible members
    • F16H61/66272—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 with endless flexible members characterised by means for controlling the torque transmitting capability of the gearing

Definitions

  • the invention relates to a cone pulley pair for a conical-pulley belt transmission.
  • Cone pulley as used for example in motor vehicles, generally contain two conical disk pairs, which are wrapped by a belt, for example a special chain. By opposing change in the distance between the conical disks of each conical disk pair, the transmission ratio can be changed continuously.
  • a pair of conical disks preferably the drive side, includes an integrated torque sensor with which the torque acting on a drive motor is detected and a contact pressure between the conical disks of the associated disk pair is changed in accordance with the torque.
  • the torque sensor is arranged directly in the space between a support plate of the cone pulley pair supporting, rigidly connected to the shaft of the cone pulley pair support ring wall and the washer.
  • a sensing piston belonging to the torque sensor has axial arms which project through the support ring wall and are in meshing engagement outside the support ring wall with an input gear driven, for example, by a drive motor.
  • the invention has for its object to solve the above problems, i. to provide a way to form the cone pulley pair such that the arms of the sensing piston with high durability are produced in a cost effective manner.
  • a pair of conical disks for a conical-pulley belt drive comprises an input shaft which is rigidly connected to a fixed disk, a travel disk axially displaceable on the shaft and non-rotatably mounted, a torque-sensing device with a sensing piston rigidly encompassing a shaft and axially displaceable and rotatable relative to the shaft is connected, which mold surfaces are formed such that the axial position of the sensing piston changes by rolling arranged between the mold surfaces rolling elements on the molding surfaces with a change in the effective between the sensing piston and the shaft torque, which sensing piston on its side facing away from the shim
  • axially directed arms which are provided with axial toothing, with an axial circumferential toothing of a rotatably mounted on the shaft and substantially axially non-displaceably rotatably frictional input wheel is engaged, and a support ring which is on the teeth of the arms radially opposite side in abutment against the arms and
  • peripheral teeth of the axial extension of the sensing piston may be formed, for example, on the radial outer side, when the input gear is formed with an internal toothing.
  • the support ring is located advantageously on the free end portions of the arms.
  • the support ring is preferably symmetrical with respect to a rotation through 180 ° about an axis containing a diameter of the support ring.
  • Figure 1 shows a longitudinal section through a conical disk pair
  • Figure 2 is a view similar to Figure 1 with axially displaced sensing piston
  • Figure 3 is a detail sectional view of the support ring at the beginning of pushing on the
  • FIG. 4 shows a detail sectional view similar to FIG. 3 with the sleeves pushed onto the arms
  • a pair of conical disks of a conical-pulley belt transmission has an input shaft 10, which is formed integrally with a fixed disk 12. On the shaft 10 is axially displaceable, but rotatably connected to the shaft, a spacer plate 14 is arranged. An unillustrated looping means runs between the conical surfaces of the discs 12 and 14 and the conical surfaces of a further, not shown cone pulley pair.
  • a cylindrical ring 16 is rigidly fixed in the radially outer region with two radially spaced walls in which a piston 18 operates, so that according to Figure 1 the right side of the piston 18, a first pressure chamber 20 is formed by the in the spacer 14 formed radial bores 22, an annular space 24 between the washer 14 and the shaft 10 and formed in the shaft 10 radial bore 26 and axial bore 28 can be acted upon by hydraulic pressure, which is variable for a translation adjustment.
  • the overall annular piston 18 is rigidly connected to a generally cup-shaped support ring wall 30, which in turn is rigidly connected to the shaft 10.
  • a ring-shaped component 34 which is formed with molding surfaces 32, is rigidly fastened to the support ring wall 30.
  • a generally annular sensing piston 36 is axially slidable sealing against the peripheral surface of the shaft 10 and an inner peripheral surface of the annular member 34.
  • the sensing piston 36 is formed with a projection directed toward the travel plate 14, on the rear side of which molding surfaces 38 are formed, which form counter surfaces to the shaping surfaces 32.
  • Between the forming surfaces 32 and 38 are rolling elements, in the example shown balls 40, respectively.
  • a second pressure chamber 42 is formed, which is acted upon via a leading through the shaft 44 supply line with hydraulic pressure, wherein the hydraulic fluid via a likewise formed in the shaft 10 discharge line 46 is derivable.
  • the effective cross section of the leading into the second pressure chamber inlet opening 48 is not determined by the axial position of the spacer plate 14.
  • the free cross section of the outgoing from the second pressure chamber discharge opening 50 is determined by the position of the sensing piston 36.
  • the sensing piston 36 projects with circumferentially preferably equally spaced axial arms 52 through recesses of the support ring wall 30 therethrough.
  • the radially outer surfaces of the arms 52 are provided with axially and radially directed teeth, which are in engagement with an internal toothing of an input gear 54, which is mounted on an outer shell 56 of a bearing generally designated 58 axially substantially immovable.
  • a support ring 60 is provided for supporting the free ends of the arms 52 of the sensing piston, which abuts against the radial inner sides of the end portions of the arms 52 and urges them outwardly so that the outer teeth of the arms are forced into secure engagement with the internal teeth of the input gear 54 become.
  • the arms 52 are, as shown, advantageously formed on a welded to the sensing piston ring part, from which they protrude axially. In this way, the welding of the arms and the ring member is relieved of directly acting on the arms in the circumferential direction bending forces.
  • Figures 3 and 4 show a section of the circled in Figures 1 and 2 area with the support ring 60 and the free end portions 62 of the arms 52, wherein in each case only one arm of advantageously at least three arms is shown.
  • each finger 52 is provided with a recess 66 which ends in a nose surface 68 at the end.
  • the support ring 60 has a radially outwardly facing outer surface 70, which is the recess 66 correspondingly, but formed with oversize, and merges via a Vorzentri fürstress 72 in the end face of the support ring.
  • the cross section of the support ring 60 is advantageously designed such that the support ring merges with a rotation of 180 ° about a diameter in itself, that can be inserted from both sides into the circumferentially spaced fingers 52.
  • the radial diameter of the pre-centering stage 72 of the support ring 60 is slightly smaller, while For example, by about 0.05 mm smaller than the smallest diameter of the nose surface 68, so that the support ring 60 centered when pushed onto the front ends of the arms 52 itself.
  • the excess of the largest diameter of the outer surface 70 of the support ring 60 with respect to the smallest inner diameter of the recess 66 is for example in the order of 0.15 mm.
  • the support ring 60 is in the inserted state in the fingers 52, preferably axially slightly outside the outer teeth 64, in the region of the fingers 52 are formed radially larger in thickness than in their end portions 62nd
  • the outer surface 70 and the inner surface of the recess 66 can be knurled in the axial direction.
  • the support ring does not require additional space since it is located within the thinned end portions of the arms within an annulus formed between the bearing 58, the arms 52, and a seal carrier.
  • the attachment of the support ring on the described snap connection has against mechanically rigid connections such.
  • the snap connection can be formed in various ways, for example, a narrow snap-on nose can be formed on the support ring, wherein a radial support is given left and right of the nose.
  • a wide snap-on nose can be formed on the ring, wherein the radial support takes place directly on the nose, as shown in Figures 3 and 4, and the snap takes place on both sides of the nose.
  • the arms rigidly connected to the sensing piston are advantageously case hardened or carbonitrided.
  • the support ring is advantageously made of steel, a tempering steel, for example ETG 100 with Rm »1000 MPa without further heat treatment, case hardened steel, hardened or carbonitrided.
  • the arms 52 are externally toothed, so that the support ring 60 is disposed within the arms.
  • the arms can be internally toothed and interact with an external toothing of the input wheel.
  • the support ring is then disposed radially outward of the arms and urges them in meshing engagement with the input gear.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

L'invention concerne une paire de poulies coniques qui contient un arbre d'entrée (10) relié solidairement à une poulie fixe (12), une poulie mobile (14) disposée à rotation solidaire sur l'axe et de manière à pouvoir coulisser axialement par rapport à ce dernier, un dispositif de détection du couple de rotation doté d'une surface façonnée (38) reliée solidairement à l'arbre et d'une autre surface façonnée (32) reliée solidairement à un piston de détection (36) qui chevauche l'arbre et qui peut coulisser axialement par rapport à l'arbre et tourner par rapport à ce dernier, les surfaces façonnées (38, 32) étant configurées de telle sorte que lors d'une modification du couple de rotation qui agit entre le piston de détection (36) et l'arbre, la position axiale du piston de détection (36) est modifiée par roulement sur les surfaces façonnées (38, 32) de corps de roulement (40) disposés entre les surfaces façonnées, le piston de détection (36) présentant sur son côté non tourné vers la poulie mobile (14), des bras (52) situés à distance les uns des autres dans la direction périphérique, orientés axialement et dotés de dentures axiales (64) qui s'engage sur une denture périphérique axiale d'une roue d'entrée (54) qui peut tourner sur l'arbre, qui est montée de manière à essentiellement ne pas se déplacer axialement et qui est entraînée en rotation, et une bague de soutien (60) qui vient se placer sur les bras (52) sur le côté opposé radialement aux dentures des bras (52) et qui repoussent les dentures (64) des bras de manière à ce qu'elles s'engagent sur la denture périphérique de la roue d'entrée (54).
EP07721977A 2006-03-24 2007-03-05 Paire de poulies coniques pour transmission a courroie enroulee sur poulies coniques Withdrawn EP2002158A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006013775 2006-03-24
PCT/DE2007/000402 WO2007110027A1 (fr) 2006-03-24 2007-03-05 Paire de poulies coniques pour transmission à courroie enroulée sur poulies coniques

Publications (1)

Publication Number Publication Date
EP2002158A1 true EP2002158A1 (fr) 2008-12-17

Family

ID=38029281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07721977A Withdrawn EP2002158A1 (fr) 2006-03-24 2007-03-05 Paire de poulies coniques pour transmission a courroie enroulee sur poulies coniques

Country Status (4)

Country Link
EP (1) EP2002158A1 (fr)
JP (1) JP2009531611A (fr)
DE (1) DE112007000503A5 (fr)
WO (1) WO2007110027A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000240768A (ja) * 1999-02-24 2000-09-05 Luk Lamellen & Kupplungsbau Gmbh 伝動装置
JP4848559B2 (ja) * 2000-12-20 2011-12-28 シェフラー テクノロジーズ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 組み込まれたトルク感応器を備えた無段変速可能な円錐形プーリ巻掛け伝動装置
DE102005037941A1 (de) * 2004-08-24 2006-03-02 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Kegelscheibenumschlingungsgetriebe, Verfahren zu dessen Herstellung sowie Fahrzeug mit einem derartigen Getriebe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007110027A1 *

Also Published As

Publication number Publication date
DE112007000503A5 (de) 2008-11-27
WO2007110027A1 (fr) 2007-10-04
JP2009531611A (ja) 2009-09-03

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