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WO2001071216A1 - Dispositif tendeur pour moyens d'entrainement - Google Patents

Dispositif tendeur pour moyens d'entrainement Download PDF

Info

Publication number
WO2001071216A1
WO2001071216A1 PCT/EP2001/002006 EP0102006W WO0171216A1 WO 2001071216 A1 WO2001071216 A1 WO 2001071216A1 EP 0102006 W EP0102006 W EP 0102006W WO 0171216 A1 WO0171216 A1 WO 0171216A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
support
tensioning
tensioning device
traction means
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/EP2001/002006
Other languages
German (de)
English (en)
Inventor
Michael Schmid
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.)
IHO Holding GmbH and Co KG
INA Waelzlager Schaeffler OHG
Original Assignee
INA Schaeffler KG
INA Waelzlager Schaeffler OHG
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 INA Schaeffler KG, INA Waelzlager Schaeffler OHG filed Critical INA Schaeffler KG
Publication of WO2001071216A1 publication Critical patent/WO2001071216A1/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
    • 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
    • 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 tensioning device for traction means, such as belts and chains, which is used, for example, in a traction mechanism drive of an internal combustion engine, in order to achieve a slip-free pretensioning of the traction means.
  • the tensioning device comprises a stationary housing and a swivel arm which is rotatably arranged on a bearing journal of the housing via a hub.
  • a tensioning means arranged with the tensioning arm, preferably a tensioning roller, is spring-supported on the tensioning means.
  • a torsion spring is provided, the spring ends of which are fastened to the housing and to the tensioning arm.
  • a tensioning device with a pot-shaped housing in which a bearing journal is arranged centrally.
  • the bearing journal serves to receive a hub, which is provided in one piece with a tension arm, with an end tensioning roller.
  • the housing in connection with the tensioning arm forms an annular interior in which a torsion spring is inserted.
  • the torsion spring used for the non-positive contact of the tensioning roller on the traction means is rotationally fixed with the spring ends directly on the housing and the tensioning arm.
  • the torsion spring which continues to exert an axial force, is supported axially with the spring ends on the housing made of metal or on the tensioning arm.
  • a spring support designed as a multifunctional part.
  • the design of the spring support made of plastic enables on the one hand axial support and on the other hand radial guidance or centering of the torsion spring.
  • the invention consequently avoids direct support of the torsion spring on the housing or on the tensioning arm, i. H. between a torsionally rigid and the pivotable component, whereby decoupling and thus noise development are effectively prevented.
  • the spring support made of plastic also provides a desired friction-reducing support and thus prevents wear on the spring end.
  • the spring support according to the invention takes on the function of effectively sealing an annular gap between the torsionally rigid and a pivotable component.
  • This further function of the spring support effectively prevents moisture or dirt particles from entering the annular gap, the slide bearing zone and lubricant from the area of the slide bearing, which has an advantageous effect on the function and service life of the bearing and thus the useful life of the entire tensioning device effect.
  • An advantageous development of the invention provides that one for the torsion resistance to provide the support surface determined on the spring support with a continuous axial increase.
  • the increase corresponds to the winding pitch of the torsion spring designed as a coil spring.
  • This helical support surface caused an improved, large-area support of the torsion spring.
  • An advantageous embodiment of the invention provides for the arrangement of the spring support between a support disk fixed to the bearing journal of the housing and the spring end.
  • the spring support is guided on a hub of the tensioning arm and provided at the end with a radially oriented, circumferential rim, on which the torsion spring is axially supported.
  • the spring support according to the invention can also be used according to the invention with a board between the support disk, which is rigidly connected to the housing, and an end face of the tensioning arm, the corresponding spring end of the torsion spring being supported on the board of the spring support.
  • the invention further includes a spring support for a tensioning device, in which the housing is provided with a torsionally rigid hollow pin, in which a bearing pin of the tensioning arm is rotatably guided.
  • a spring support is provided, the radially aligned rim of which rests on the tension arm and the spring end of the torsion spring is supported on the side of the spring support facing away from the tension arm.
  • the spring support is provided according to the invention with a sleeve section which is guided on the hub of the tensioning arm or on a lateral surface of the hollow pin which is integrally connected to the housing.
  • the structure of the spring support provides that a circumferential, radially aligned board adjoining the support disk or the tensioning arm adjoins the sleeve section at the end, on which mutually the torsion spring is supported over the spring end.
  • Effective centering of the spring end is achieved according to the invention on the spring support with a shoulder arranged radially offset from the sleeve section.
  • the shoulder axially aligned in the direction of the torsion spring is preferably limited in length.
  • the torsion spring is guided radially and thus centered on the circumferential or sectionally arranged shoulder.
  • the shoulder provided for centering on the spring support can be arranged differently on the radially oriented board of the spring support.
  • the invention includes both a shoulder enclosing the spring on the outside and a shoulder on which the spring is guided.
  • the spring support made of plastic can furthermore be arranged according to the invention between the support disk, which is rigidly connected to the housing, and a hub of the tensioning arm.
  • This installation position has the advantage of a further improved sealing of the annular gap between the clamping arm and the housing.
  • the sleeve sections with which the spring support is guided on the lateral surface of the tensioning arm or the housing can be omitted if required.
  • the spring support is fixed in a torsionally rigid manner to the support disk or the tensioning arm.
  • the spring support can be glued or riveted to the associated component.
  • a suitable material for the spring support according to the invention is in particular a wear-resistant plastic with sufficient pressure-resistant properties, for example an elastomer.
  • FIG. 1 shows a longitudinal section through a clamping device provided with a spring support according to the invention
  • FIG. 2 shows the tensioning device shown in FIG. 1 with an alternatively designed spring support, the rim of which is inserted between an end face of the tensioning arm and a support disk of the housing;
  • Figure 3 shows a clamping device in a longitudinal section, in which the
  • a tensioning device 1 is shown in a longitudinal section, which is provided for tensioning a traction mechanism drive, in particular a belt drive for an internal combustion engine.
  • the structure comprises a stationary housing 2, on the bearing pin 3 of which a hub 4 is pivotally arranged. Between the hub 4 and the bearing pin 3, a slide bearing 6 is inserted in an annular gap 5, in order to achieve a low-friction pivoting movement of the hub 4.
  • a clamping arm 7 At one end of the hub 4 there is a clamping arm 7, which is at right angles to a longitudinal axis 8 of the housing 2 is aligned and provided at the end with a roller-mounted tensioning roller 9.
  • a torsion spring 11 is provided to achieve a spring-loaded contact of the tensioning roller 9 with a traction means 10.
  • the torsion spring 11 is arranged between a support disk 12, which is rigidly connected to the housing 2, and the tensioning arm 7, spring ends 13, 14 on the support disk 12, respectively the clamping arm 7 are fixed in position. Due to a pretensioned installation position of the torsion spring 11, an always supported contact of the tensioning roller 9 on the traction means 10 is ensured. In addition to a torsional force or a torque component, the torsion spring 11 continues to exert an expanding force acting in the axial direction, as a result of which the tensioning arm 7 is pressed onto a friction element 15 inserted between the housing 2 and the tensioning arm 7.
  • the annular friction element 15 is adapted to a corresponding contact surface 16 of the clamping arm 7.
  • a spring support 20a according to the invention which is designed as a multi-function part, is arranged between the spring end 13 facing away from the tension arm 7 and the support disk 12 which is rigidly attached to the housing 2.
  • the torsion spring 11 is axially supported on the spring support 20a and is also guided or centered radially.
  • the spring support is provided with a continuously axially increasing support surface 37.
  • the helical support surface is adapted to a pitch of the torsion spring 11.
  • the structure of the spring support 20a comprises a sleeve section 17 which is guided on the lateral surface of the hub 4 and to which a flange 18 extending radially beyond the outer contour of the torsion spring 11 is connected at the end.
  • the spring support 20a forms a shoulder 19 which is offset radially to the sleeve section 17 and on which the spring end 13 of the torsion spring 11 is centered.
  • the shoulder 19 can be arranged both circumferentially and in sections.
  • the spring support 20a is supported on the inside of the support disk 12 over a large area, supported by the axial force of the torsion spring 11. This system effectively prevents the entry of contaminants of any kind into the annular gap 5 and lubricant leakage from the annular gap 5.
  • the spring support 20a consequently continues to have a sealing function.
  • FIG. 2 In a second exemplary embodiment (FIG. 2) of a tensioning device 1 according to the invention, the components which correspond to the first exemplary embodiment are provided with the same reference numerals, so that with regard to their Description can be made to the embodiment of the first embodiment.
  • the tensioning device 1 is provided with a spring support 20b, the rim 22 of which extends radially up to close to the outer contour of the bearing journal 3.
  • This design forms an enlarged support surface of the spring support 20b and also improves the sealing function of the spring support 20b.
  • gluing is suitable for this.
  • the spring support 20b which is preferably made of a plastic, can also be welded to the support disc 12.
  • riveting and / or a form-fitting connection is suitable, for example in the form of a toothing profile between the rim 22 and the support disk 12, which is distributed in sections over the circumference.
  • FIG. 3 shows the tensioning device 21, which is provided with the spring support 20c, the structure of which largely corresponds to the spring support 20a shown in FIG. 1.
  • the tensioning device 21 has a pot-shaped housing 23 with a centrally arranged hollow pin 24, which has a bearing pin 25 of the tensioning arm 26 rotatably arranged via a slide bearing 27.
  • the torsion spring 28 inserted in the housing 23 is fixed in position with the spring ends 29, 30 on the tensioning arm 26 or the housing 23.
  • the spreading force exerted by the torsion spring 28 provides a non-positive support for a support disk 31 which is fixed in a rotationally rigid manner on the bearing journal 25 on the housing 23.
  • the friction element 32 inserted between the support disk 31 and the housing 23 serves to dampen actuating movements.
  • the spring support 20c is inserted in the clamping device 21 between the spring end 29 and the clamping arm 26.
  • the spring support 20c is advantageously rotationally fixed to the tensioning arm 26, for example by gluing, so that when the tensioning arm 26 moves, the sleeve section 33 of the spring support 20c on a jacket surface of the sleeve 24 of the housing 23 slides.
  • the spring support 20c which bears against the clamping arm 26 via the rim 34 is further provided with a shoulder 35 for centering the spring end 29 and furthermore provides an effective sealing function of the annular gap 36 predetermined by the slide bearing 27 between the bearing journal 25 and the inner diameter of the hollow journal 24.
  • Housing 31 support disc

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

L'invention concerne un dispositif tendeur pour moyens d'entraînement, comportant un bras tendeur (7) qui peut pivoter par rapport au boîtier (2) et qui est monté sur un moyen d'entraînement (10) par l'intermédiaire d'un ressort de torsion (11). Une extrémité (13) du ressort de torsion (11) prend appui sur le boîtier (2) par l'intermédiaire d'un support de ressort (20a).
PCT/EP2001/002006 2000-03-21 2001-02-22 Dispositif tendeur pour moyens d'entrainement Ceased WO2001071216A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10013978.7 2000-03-21
DE2000113978 DE10013978A1 (de) 2000-03-21 2000-03-21 Spannvorrichtung für Zugmittel

Publications (1)

Publication Number Publication Date
WO2001071216A1 true WO2001071216A1 (fr) 2001-09-27

Family

ID=7635771

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/002006 Ceased WO2001071216A1 (fr) 2000-03-21 2001-02-22 Dispositif tendeur pour moyens d'entrainement

Country Status (2)

Country Link
DE (1) DE10013978A1 (fr)
WO (1) WO2001071216A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003074888A1 (fr) * 2002-03-05 2003-09-12 Ina-Schaeffler Kg Cylindre destine a un entrainement a courroie
FR3023891A1 (fr) * 2014-07-18 2016-01-22 Skf Ab Dispositif tendeur d'un organe de traction

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333876A1 (de) * 2003-07-25 2005-02-17 Ina-Schaeffler Kg Spann- oder Umlenkelement eines Zugmitteltriebs
DE102005031294B4 (de) * 2005-07-05 2014-07-10 Schaeffler Technologies Gmbh & Co. Kg Zugmitteltrieb eines Verbrennungskolbenmotors
DE102005053195A1 (de) * 2005-11-08 2007-05-10 Schaeffler Kg Spanneinrichtung für ein Zugmittel
DE102006041678A1 (de) 2006-09-06 2008-03-27 Schaeffler Kg Spannvorrichtung eines Zugmitteltriebs
CN108930766A (zh) * 2018-08-14 2018-12-04 浙江瑞德利汽车部件有限公司 一种耐磨损高强度电机空调轮系张紧轮

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4934988A (en) 1988-09-22 1990-06-19 Koyo Seiko Co., Ltd. Belt tensioner
EP0400772A2 (fr) * 1989-06-02 1990-12-05 Litens Automotive Inc Tendeur à ressort de torsion avec stabilisateur
EP0709595A1 (fr) * 1994-10-28 1996-05-01 DAYCO PTI S.p.A. Tendeur pour courroie de transmission

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4698049A (en) * 1986-04-11 1987-10-06 Litens Automotive Inc. Belt tensioner with frustoconical pivot bearing
DE3714645A1 (de) * 1987-05-02 1988-11-17 Daimler Benz Ag Spannvorrichtung fuer riemen oder ketten an brennkraftmaschinen
DE9017863U1 (de) * 1990-04-04 1992-07-30 MAGNA INTERNATIONAL GmbH, 6460 Gelnhausen Automatischer Riemenspanner
DE4220879A1 (de) * 1992-06-25 1994-01-05 Litens Automotive Gmbh Riemenspannvorrichtung
DE4327141A1 (de) * 1993-08-12 1995-02-16 Litens Automotive Gmbh Automatischer Riemenspanner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4934988A (en) 1988-09-22 1990-06-19 Koyo Seiko Co., Ltd. Belt tensioner
EP0400772A2 (fr) * 1989-06-02 1990-12-05 Litens Automotive Inc Tendeur à ressort de torsion avec stabilisateur
EP0709595A1 (fr) * 1994-10-28 1996-05-01 DAYCO PTI S.p.A. Tendeur pour courroie de transmission

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003074888A1 (fr) * 2002-03-05 2003-09-12 Ina-Schaeffler Kg Cylindre destine a un entrainement a courroie
US7011593B2 (en) 2002-03-05 2006-03-14 Ina-Schaeffler Kg Tensioning or deflection pulley for a belt drive
FR3023891A1 (fr) * 2014-07-18 2016-01-22 Skf Ab Dispositif tendeur d'un organe de traction

Also Published As

Publication number Publication date
DE10013978A1 (de) 2001-10-25

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