EP2210015A2 - Disque de roulement, poulie de tension et/ou de renvoi, et transmission à courroie trapézoïdale crantée - Google Patents

Disque de roulement, poulie de tension et/ou de renvoi, et transmission à courroie trapézoïdale crantée

Info

Publication number
EP2210015A2
EP2210015A2 EP08851471A EP08851471A EP2210015A2 EP 2210015 A2 EP2210015 A2 EP 2210015A2 EP 08851471 A EP08851471 A EP 08851471A EP 08851471 A EP08851471 A EP 08851471A EP 2210015 A2 EP2210015 A2 EP 2210015A2
Authority
EP
European Patent Office
Prior art keywords
ribbed belt
running
straight
belt
tread
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Withdrawn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
EP08851471A
Other languages
German (de)
English (en)
Inventor
Thomas Mennerat
Thomas Rasche
Johann Singer
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 Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2210015A2 publication Critical patent/EP2210015A2/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Withdrawn legal-status Critical Current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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • F16H55/49—Features essential to V-belts pulleys

Definitions

  • the invention relates to a running disk of a tensioning and / or deflection roller for a V-ribbed belt drive according to the preamble of claim 1. Furthermore, a tensioning and / or deflection roller with a running disk according to the invention and a V-ribbed belt drive having a tensioning and / or deflection roller with such a running disk includes.
  • V-ribbed belt drives like other traction mechanism drives, serve to transmit a torque, wherein a V-ribbed belt is used as traction means.
  • the V-ribbed belt has a plurality of longitudinal elevations, the so-called ribs, which generally have a substantially V-shaped cross-section.
  • the V-ribbed belt is stretched over at least one drive and one driven roller, each having a running disk for receiving the belt.
  • the circumferential treads of the pulleys have, to the ribs of the V-ribbed belt corresponding, circumferential V-shaped depressions, called grooves on.
  • the ribs of the V-ribbed belt are in engagement with the grooves of the running surfaces, wherein the rib side surfaces abut against the flank surfaces of the grooves.
  • V-ribbed belt drives are used today predominantly in the motor vehicle industry for driving ancillaries, such as, for example, an alternator, cooling water pump or air-conditioning compressor, it being possible to drive several units at the same time with one belt.
  • ancillaries such as, for example, an alternator, cooling water pump or air-conditioning compressor
  • To ensure a constant belt force tensioning of the V-ribbed belt usually takes place via automatic clamping systems, wherein the belt is guided over at least one tensioning and / or deflection roller.
  • these rollers also have running wheels with grooves corresponding to the belt profile.
  • V-ribbed belts are already designed for a long service life, a general concern remains to extend the service life by minimizing belt wear in order to postpone the time-consuming and expensive replacement of the belt as long as possible.
  • a running disk of a tensioning and / or deflection roller according to claim 1.
  • the cross-sectional profile of the running surface of the running disk is completely or partially straight, with the straight portions lying on the envelope surface of the running surface.
  • Low-friction running of the V-ribbed belt on the straight, groove-free running surface of the running disk can also reduce fuel consumption and thus also pollutant emissions. Especially at high speeds, a reduction of the frictional forces is noticeable in this way.
  • the substantially cylindrical design of the running disk has the advantage that it is inexpensive to produce due to the simple design, regardless of whether steel or plastic is used as the material for the running disks.
  • plastic pulleys with smooth treads can be made by using simple injection tools. Instead of several radial slide to form the groove shape, it only requires two semi-cylindrical shapes.
  • Rotary and axial runout values can be subsequently improved by 3D corrections. Accordingly, the manufacturing and processing costs can be significantly reduced even with a steel disc.
  • the cross-sectional profile of the running surface of the running disk is partially, that is sections, straight.
  • the straight sections lie on the envelope of the tread.
  • the cross-sectional profile of the tread to the straight sections substantially V-shaped depressions, wherein in each case between two V-shaped depressions, the tread extends straight. That is, the tread completes laterally each with a substantially V-shaped recess.
  • the flank surfaces of the recesses serve as contact surfaces for the ribs of the V-ribbed belt.
  • the radial extent of the depressions is selected to be smaller than the profile depth of the ribs of the V-ribbed belt to be used, so that even in this embodiment an Ringing the belt contact surface and thus a lower stress due to friction can be achieved.
  • the service life of the V-ribbed belt increases, while at the same time fuel consumption and pollutant emissions can be minimized.
  • radially extending ribs are provided both in the case of the running disk with a straight running surface and in the running disk with a partially straight running surface.
  • the rims are intended to prevent the belt from running or jumping off.
  • the rims have inner flank surfaces, which preferably extend inclined to the straight running surface or to the straight portions of the tread.
  • the distance between the inner flank surfaces increases towards the outside.
  • the opposing inner flank surfaces of the shelves form conically extending boundary surfaces, which facilitate centering of the belt.
  • the inner flank surfaces of the ribs preferably have at least one circumferential step.
  • the step limits the portion of the inner flank surfaces, which serve as a contact surface for the lateral flank surfaces of the V-ribbed belt.
  • a clamping and / or deflection roller with a running disk according to the invention differs from a conventional roller only with regard to the inventive design of the running disk. Clamping and / or deflection rollers with profiled running disks can therefore be exchanged without changing the V-ribbed belt drive, so that the described advantages can also be achieved by retrofitting to a V-ribbed belt drive already in use.
  • a V-ribbed belt drive is claimed with a tensioning and / or deflection roller having a running disk according to the invention.
  • the running surface of the running disk preferably has a straight cross-sectional profile and an annular gap is formed in the operating state between the running surface and the V-ribbed belt in the region of the interstices between the ribs.
  • the contact surface of the belt is thus limited to the rib ends, which are preferably made flattened. Only then frictional forces act, so that the proportion of the surfaces subject to wear is reduced.
  • the normal force to the contact surface is not reinforced by wedge action and there is no relative movement between the belt ribs and V-shaped depressions when the belt starts and ends.
  • the running surface can also have a cross-sectional profile which is adapted to the ribs of the V-ribbed belt so far that in operation each rib of the V-ribbed belt is in engagement with a recess of the running surface, wherein between the straight portions of the running surface of the running disk and the V-ribbed belt in each case forms an annular gap.
  • the belt has a cross-sectional profile, in which in each case an annular gap between see forming the flattened ends of the ribs of the V-ribbed belt and the bottom of the substantially V-shaped recesses of the tread.
  • the rib ends are then also subject to no frictional stress.
  • the invention also relates to the use of a V-ribbed belt drive according to the invention in an internal combustion engine of a motor vehicle, in particular for driving an auxiliary unit. Due to the reduced contact surface and the associated reduced wear of the belt replacement of the belt can be postponed in time. In addition, the friction losses decrease, so that the fuel consumption and thus ultimately the emission of pollutants, which are criteria that is generally given more attention today when buying a motor vehicle.
  • FIG. 3 shows the cross-sectional profile of a first embodiment of a running disk according to the invention
  • FIG. 4 shows the cross-sectional profile of a second embodiment of a running disk according to the invention.
  • FIGS. 1 a and 1 b The running disk according to the invention serves to receive a known KeN ribbed belt as shown in FIGS. 1 a and 1 b.
  • FIG. 1 a shows the cross-sectional profile of a V-ribbed belt provided with ribs 9 on one side, the rib gaps 8 being V-shaped.
  • the ribs 9 have outer, straight sections 10.
  • FIG. 1 b shows the cross section of a V-ribbed belt provided with ribs 9 on both sides.
  • This embodiment of a V-ribbed belt also has substantially V-shaped rib gaps 8 and ribs 9 with outer, straight sections 10.
  • V-ribbed belts are known from the prior art running wheels, which have a cross-sectional profile corresponding to FIG.
  • the rib side walls 13 engage the inner flank surfaces 12 of the recesses 3. In this way an optimal adhesion between the belt and the rotor is achieved.
  • FIG. 3 shows the cross-sectional profile of a running disk according to the invention, in which the running surface 1 runs straight, that is to say without depressions 3.
  • the straight rib sections 10 of the belt are pressed onto the running surface 1 (see also FIGS. 1 a and 1 b, identification of the contact surfaces by a double line).
  • the frictional connection between the belt and the running disk is thereby reduced, it does not have a negative effect on a tensioning and / or deflecting roller since no torque has to be transmitted.
  • only the straight rib sections 10 are subject to wear, since the rib side walls 13 do not come into contact with the running surface. In particular, at high speeds, this circumstance also has a positive effect on the required drive power, so that overall fuel consumption and pollutant emissions decrease.
  • radially extending shelves 4 are provided for lateral delimitation of the tread and for guiding the belt. They have inner flank surfaces 5, which are formed at least partially corresponding to the lateral flank surfaces 6 of the belt. They form contact surfaces or running surfaces for the two outer rib side walls 13 of the belt, so that the belt is guided and counteracts drainage of the belt (see also FIGS. 1 a and 1 b, identification of the contact surfaces by a double line).
  • a circumferential step 7 limits the tread of the lateral belt flanks in the radial direction, the moreover extending inner flank surfaces of the flanges serving as additional securing means for the belt, for example to prevent the belt from jumping off.
  • FIG. 4 An alternative embodiment of a running disk according to the invention is shown in FIG. 4.
  • Straight sections 2 and essentially V-shaped depressions 3 of the running surface 1 can be taken from the illustrated cross-sectional profile.
  • the depressions 3 extend in the radial direction to such an extent that the rib side walls 13 do not rest completely against the inner flank surfaces 12 of the depressions 3.
  • the straight sections 2 of the tread 1 also ensure that an annular gap remains between the belt and the running surface in the intercostal spaces 8, respectively. If a belt with a cross-sectional profile according to FIG. 1 a or 1 b is used, due to the straight sections 10 of the ribs 9 there also remains a circumferential annular gap between the bottom 11 of the depressions 3 and the straight sections 10 of the ribs 9.
  • the belt contact surface thus reduces on subregions of the rib side walls 13, whereby a reduced wear of the belt also occurs here.
  • the running disk according to FIG. 4 preferably also has laterally arranged, radially extending ribs 4 with inner flank surfaces 5 as contact surfaces or running surfaces for the lateral flanks 6 of the belt.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

L'invention concerne un disque de roulement d'une poulie de tension et/ou de renvoi pour une transmission à courroie trapézoïdale crantée, disque qui possède sur sa circonférence une surface de roulement (1) pour les nervures (9) de la courroie trapézoïdale crantée. Selon l'invention, le profil de section de la surface de roulement (1) est réalisé totalement ou partiellement rectiligne, sachant que les parties rectilignes (2) se situent sur la surface d'enveloppe de la surface de roulement (1). L'invention concerne en outre une poulie de tension et/ou de renvoi équipée d'un disque de roulement selon l'invention, ainsi qu'une transmission à courroie trapézoïdale crantée qui comprend une poulie de tension et/ou de renvoi équipée d'un tel disque de roulement. L'invention concerne également l'utilisation d'une telle transmission à courroie trapézoïdale crantée dans un moteur à combustion interne d'un véhicule automobile.
EP08851471A 2007-11-21 2008-10-31 Disque de roulement, poulie de tension et/ou de renvoi, et transmission à courroie trapézoïdale crantée Withdrawn EP2210015A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710055543 DE102007055543A1 (de) 2007-11-21 2007-11-21 Laufscheibe, Spann- und/oder Umlenkrolle sowie Keilrippenriementrieb
PCT/EP2008/064771 WO2009065717A2 (fr) 2007-11-21 2008-10-31 Disque de roulement, poulie de tension et/ou de renvoi, et transmission à courroie trapézoïdale crantée

Publications (1)

Publication Number Publication Date
EP2210015A2 true EP2210015A2 (fr) 2010-07-28

Family

ID=40210841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08851471A Withdrawn EP2210015A2 (fr) 2007-11-21 2008-10-31 Disque de roulement, poulie de tension et/ou de renvoi, et transmission à courroie trapézoïdale crantée

Country Status (3)

Country Link
EP (1) EP2210015A2 (fr)
DE (1) DE102007055543A1 (fr)
WO (1) WO2009065717A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004068952A (ja) * 2002-08-07 2004-03-04 Toyota Motor Corp ベルト伝動装置
JP2005098461A (ja) * 2003-09-26 2005-04-14 Ntn Corp センサ付軸受およびこれを用いたプーリ，電磁クラッチ
US7316628B2 (en) * 2004-01-13 2008-01-08 The Gates Corporation Ip Law Dept. Two speed transmission and belt drive system
EP1801460B1 (fr) * 2005-12-21 2010-04-14 LuK Lamellen und Kupplungsbau Beteiligungs KG Unité motrice ayant un composant moteur interne et un composant moteur externe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009065717A2 *

Also Published As

Publication number Publication date
WO2009065717A2 (fr) 2009-05-28
WO2009065717A3 (fr) 2009-12-17
DE102007055543A1 (de) 2009-05-28

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