WO2009024418A1 - Tendeur de courroie - Google Patents

Tendeur de courroie Download PDF

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Publication number
WO2009024418A1
WO2009024418A1 PCT/EP2008/059311 EP2008059311W WO2009024418A1 WO 2009024418 A1 WO2009024418 A1 WO 2009024418A1 EP 2008059311 W EP2008059311 W EP 2008059311W WO 2009024418 A1 WO2009024418 A1 WO 2009024418A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
belt tensioner
housing
damping sleeve
band spring
Prior art date
Application number
PCT/EP2008/059311
Other languages
German (de)
English (en)
Inventor
Thorsten Liebel
Johann Singer
Original Assignee
Schaeffler 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 Kg filed Critical Schaeffler Kg
Publication of WO2009024418A1 publication Critical patent/WO2009024418A1/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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1218—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the dry friction type
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/081—Torsion springs

Definitions

  • the invention relates to a belt tensioner with a substantially cylindrical housing and a coaxially inset hub of a clamping arm, wherein the housing and the hub are rotatably mounted to each other and supported with a helical torsion spring against each other with bias, and with a damping device having a damping sleeve and a band spring adapted to the damping sleeve, wherein the band spring is arranged between the damping sleeve and the torsion spring and wherein the band spring and the torsion spring are connected in series.
  • a belt tensioner in which a band spring encloses a damping bushing, wherein both are arranged at a distance from a helical torsion spring which lies on a larger radius and on the one hand with the receiving housing and the other with the hub secured against rotation connected is.
  • the spring force of the torsion spring is transmitted via a roller carrier and a roller as a biasing force on a tensioning belt, wherein the damping mechanism fulfills the task to calm the spring-mass system and to avoid undesirable belt vibrations.
  • the damping here is clearly asymmetrical, with a higher attenuation and, when the band spring opens, lower attenuation occurs when the band spring attracts.
  • DE 100 63 638 A1 describes a belt tensioner with a clamping arm with a hub, referred to as a swinging element, which is designed as a cup-shaped element with a bottom and an opening pointing towards the base.
  • the swing member has a bearing extending from the ground toward the base and supported by a support shaft, and an arm projecting from the outer peripheral surface of the pot-shaped member and supporting a tension roller.
  • the oscillating element can pivot or oscillate about an axis of rotation coinciding with the axis of the carrier shaft.
  • a damping element is secured to the base of a stationary housing at a location closer to the base than to the bearing. The damping element slides on approximately the entire circumference with friction on an inner peripheral surface of the cup-shaped element and supports the vibrating element.
  • a belt tensioner which has a pivot arm which is attached to a staggered cylinder part, which supports the pivot arm and is rotatable about a pivot pin fixed to a base.
  • a arranged on the pivot pin sleeve-like bush has a bearing surface which carries the cylinder part.
  • Attached to the swing arm is a belt pulley which engages a belt of a belt drive system and receives a belt load which generates a belt force component for transmission to the cylinder part.
  • the hub load and the normal force component generated by a damper mechanism are held by at least one or two bushings having two axially spaced bearing surfaces.
  • the bushings have an axial length by which the bearing surfaces are sized for such average pressure contact that each bearing surface wears radially at substantially the same rate. Due to the substantially same radial wear rate of the bearing surfaces, the pulley alignment over the expected life of the clamping device should be ensured.
  • DE 10 2004 047 422 A1 discloses a belt tensioner with a substantially cylindrical receiving housing and a coaxial housing therein. hub, wherein the receiving housing and the hub are rotatably mounted to each other and supported with a helical torsion spring against each other with bias, and with a damping device comprising a circumferentially slotted damping bushing and a damping bush adapted to the band spring.
  • the damping bushing bears against a housing of a tensioning arm of the belt tensioner which is connected to the hub, wherein the belt spring lies between the damping bushing and the torsion spring, in such a way that the band spring and the torsion spring are connected in series, the torsion spring acting on the stationary gear - Housing of the belt tensioner and the band spring on the housing of the clamping arm is supported.
  • This arrangement has the advantage that a very compact construction of the belt tensioner is made possible.
  • the friction between the work with the clamping arm or clamping lever moving friction lining of the damping bushing and the stationary housing of the belt tensioner is performed, which can lead to increased wear and thus premature failure of the belt tensioner with respect to oscillating movements of the tensioning arm.
  • the invention has for its object to provide a belt tensioner, which eliminates the disadvantages.
  • a cheap to manufacture and compact constructed belt tensioner should be created in which vibration damping is effectively and low-wear causes.
  • the invention is based on the finding that the stated object can be achieved in a surprisingly simple manner in that the damping sleeve and the band spring acting against it are fixed in the stationary housing. are ordered, wherein the band spring is supported against the housing and the torsion spring is clamped against the hub.
  • the invention is therefore based on a belt tensioner with a substantially cylindrical housing and a coaxially inset hub of a clamping arm, wherein the housing and the hub are rotatably mounted to each other and supported by a helical torsion spring against each other with prestressing, and with a damping device, which comprises a damping sleeve and a band spring adapted to the damping sleeve, wherein the band spring is arranged between the damping sleeve and the torsion spring and wherein the band spring and the torsion spring are connected in series.
  • At least one damping sleeve and at least one band spring are arranged in the stationary housing, wherein the band spring is supported with one end against the housing and with its other end against one end of the torsion spring, wherein the other end of the torsion spring braced against the hub is.
  • the friction lining of the damping sleeve also acts against the oscillating lever, as is already known from DE 10 2004 047 422 A1, but indirectly via the connection of the band spring clamped against the stationary housing the torsion spring clamped against the hub or a cover of the tensioning arm connected to the hub.
  • the damping sleeve does not rotate with the hub and thus with the clamping arm, but remains more or less rigid in the stationary housing.
  • the wear of the damping sleeve can be significantly reduced in a surprisingly simple manner.
  • the construction of the belt tensioner which is known from DE 10 2004 047 422 A1 and is compact and space-saving, is in no way impaired.
  • the hub is connected to a cover, on which the clamping arm is formed.
  • a damping device is arranged in the lid, which comprises a damping sleeve and a matched to the damping sleeve band spring, wherein the free end of the torsion spring is supported on a radially inwardly angled end of the leaf spring.
  • This embodiment can also be supplemented by a radially outwardly angled end of the band spring engages in a slot in the lid, wherein the damping sleeve is arranged radially outside of the band spring.
  • the damping sleeve is integrally formed on the band spring.
  • an embodiment of the invention is particularly advantageous, which is characterized in that the damping sleeve is integrally connected by injection molding or rolling on the band spring.
  • Fig. 2 shows the belt tensioner of FIG. 1 in cross section along a line
  • FIG. 3 shows a second embodiment of a belt tensioner according to the invention in longitudinal section
  • Fig. 4 is a band spring of the belt tensioner according to the invention in cross section.
  • a first embodiment of a belt tensioner 1 according to the invention is shown, wherein in Fig. 1, the belt tensioner 1 in longitudinal section along the line BB 'in Fig. 2, and in Fig. 2 in cross section along the line AA 'Is shown in Fig. 1.
  • the belt tensioner 1 has a substantially cylindrical and stationary, for example, connected to a motor block housing 2 and a housing 2 in this housing hub 3, which are arranged with respect to a rotational and central axis concentric with each other and rotatable against each other.
  • the hub 3 is rotatably supported by a bolt 4 on a pin 5, which is directly connected to the housing 2.
  • the housing 2 is provided with means, not shown, for example, flanges or the like, by means of which it can be fixed non-positively in its mounting location.
  • a lid 6 is integrally connected to the hub 3.
  • Housing 2 and hub 3 are biased against each other via a helical torsion spring 9, wherein in Fig. 2, only a free end 10 of the torsion spring 9 is shown.
  • the other end 11 of the torsion spring 9 is supported against rotation in the lid 6 from.
  • the housing 2 directed free end 10th
  • the torsion spring 9, which can be seen in Fig. 2 is supported on a band spring 12 from whose free end 13 is bent radially inwardly and the other end 14 is secured against rotation on the housing 2, in particular by the fact that angled radially outward End 14 of the band spring 12 engages in a slot 15 in the housing 2.
  • the torsion spring 9 and the band spring 12 are connected in this manner between the housing 2 and the hub 3 in series.
  • the springs are biased in this case, wherein they are radially mounted, that are widened.
  • Radially outside the band spring 12 is seated a damping sleeve 16, which is acted upon indirectly indirectly by the torsion spring 9 and directly from the band spring 12 with a force, and which is supported axially below and radially inwardly on the housing 2.
  • the housing 2 has, moreover, a per se known, not shown, rotation stop, which cooperates with an inner recess on a cover 6. In this way, the housing 2 and the hub 3 are only limited by a peripheral sector rotated against each other.
  • a second embodiment of a belt tensioner 1 is shown in longitudinal section corresponding to the section of FIG. 1, which substantially corresponds to the belt tensioner 1 of Figures 1 and 2, so that the same reference numerals are used for the same components.
  • the belt tensioner 1 of Fig. 3 comprises a substantially cylindrical housing 2 and a hub 3 in the latter, which are arranged concentrically with each other and rotatable relative to each other with respect to a rotational and central axis.
  • the hub 3 is rotatably supported by a bolt 4 on a pin 5, which is directly connected to the housing 2.
  • a lid 6 is integrally connected to the hub 3.
  • a tension roller 8 is rotatably mounted, which presses against a drive belt of a belt drive, not shown, and biases the drive belt during operation.
  • the housing 2 and the hub 3 are also biased against each other via a helical torsion spring 9.
  • the housing 2 directed to the free end 10 of the torsion spring 9 is supported on a band spring 12 from whose free end 13 is bent radially inward and the other end 14 is fixed against rotation on the housing 2.
  • the radially outwardly angled end 14 of the band spring 12 engages in a slot 15 in the housing 2 a.
  • the torsion spring 9 and the band spring 12 are also biased, wherein they are radially mounted, that are widened.
  • Radially outside of the band spring 12 is also a damping sleeve 16 which is acted upon indirectly indirectly by the torsion spring 9 and directly from the band spring 12 with a force, and which is supported axially below and radially inwardly on the housing 2.
  • the radially outwardly angled end 18 of the second band spring 17 engages in a slot 19 in the lid 6 a.
  • Radially outside the band spring 17 is also a damping sleeve 20 which is acted upon indirectly indirectly by the torsion spring 9 and directly from the band spring 17 with a force, and which is supported axially above and radially inside the cover 6.
  • the free end 11 of the torsion spring 9 is supported on a radially inwardly angled end 21 of the leaf spring 17 from.
  • the torsion spring 9 is in this case stored virtually floating by themselves with their free ends 10, 11 against the radially inwardly directed free ends 13, 21 of the two axially oppositely disposed band springs 12 and 17 is supported.
  • Fig. 4 a particularly preferred embodiment of an existing of the damping sleeve 16 and the band spring 12 damping element in cross-section in an enlarged view is shown.
  • the consisting of damping sleeve 20 and band spring 17 damping element of FIG. 3 can be constructed the same way.
  • the damping sleeve 16 is integrally formed in this embodiment of the band spring 12, namely the fact that the material of the damping sleeve 16, for example, a polymer plain bearing material, molded onto the band spring 12 and the band spring 12 is encapsulated by the material of the damping sleeve 16 ,
  • the material of the damping sleeve 16 for example, a polymer plain bearing material

Landscapes

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

Abstract

La présente invention concerne un tendeur de courroie (1) comprenant un boîtier (2) sensiblement cylindrique et un moyeu (3) d'un bras tendeur (7) qui est placé de façon coaxiale dans le boîtier. Le boîtier (2) et le moyeu (3) sont montés de manière à pouvoir tourner l'un par rapport à l'autre et sont précontraints l'un contre l'autre avec un ressort de torsion (9) en forme de vis. Le tendeur de courroie comprend également un dispositif d'amortissement qui comporte un manchon d'amortissement (16, 20) et un ressort à ruban (12, 17) adapté au manchon d'amortissement (16, 20). Le ressort à ruban (12, 17) est situé entre le manchon d'amortissement (16, 20) et le ressort de torsion (9). Le ressort à ruban (12, 17) et le ressort de torsion (9) sont raccordés en série. Afin d'améliorer l'amortissement du tendeur de courroie, au moins un manchon d'amortissement (16) et au moins un ressort à ruban (12) sont placés dans le boîtier fixe (2). Une extrémité (14) du ressort à ruban (12) s'appuie contre le boîtier (2) et l'autre extrémité (13) s'appuie contre une extrémité (10) du ressort de torsion (9), l'autre extrémité (11) du ressort de torsion étant contrainte contre le moyeu (3).
PCT/EP2008/059311 2007-08-18 2008-07-16 Tendeur de courroie WO2009024418A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007039133.3 2007-08-18
DE200710039133 DE102007039133A1 (de) 2007-08-18 2007-08-18 Riemenspanner

Publications (1)

Publication Number Publication Date
WO2009024418A1 true WO2009024418A1 (fr) 2009-02-26

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Application Number Title Priority Date Filing Date
PCT/EP2008/059311 WO2009024418A1 (fr) 2007-08-18 2008-07-16 Tendeur de courroie

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DE (1) DE102007039133A1 (fr)
WO (1) WO2009024418A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109690132A (zh) * 2016-09-20 2019-04-26 舍弗勒技术股份两合公司 皮带张紧器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008050384A1 (de) * 2008-10-02 2010-04-08 Schaeffler Kg Spann- und Dämpfungsvorrichtung für Zugmitteltriebe
ITTO20131032A1 (it) * 2013-12-17 2015-06-18 Dayco Europe Srl Tenditore per una trasmissione a cinghia

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1640636A2 (fr) * 2004-09-28 2006-03-29 Muhr und Bender KG Dispositif tendeur de courroie à amortissement élevé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002039297A (ja) 2000-07-19 2002-02-06 Unitta Co Ltd オートテンショナ
DE10131916A1 (de) 2001-07-05 2003-01-23 Muhr & Bender Kg Spanneinrichtung für Zugmittel, insbesondere Riemenspanneinrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1640636A2 (fr) * 2004-09-28 2006-03-29 Muhr und Bender KG Dispositif tendeur de courroie à amortissement élevé

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109690132A (zh) * 2016-09-20 2019-04-26 舍弗勒技术股份两合公司 皮带张紧器

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Publication number Publication date
DE102007039133A1 (de) 2009-02-19

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