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WO2009053165A2 - Roue à chaîne pour une transmission à moyen de traction - Google Patents

Roue à chaîne pour une transmission à moyen de traction Download PDF

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Publication number
WO2009053165A2
WO2009053165A2 PCT/EP2008/062157 EP2008062157W WO2009053165A2 WO 2009053165 A2 WO2009053165 A2 WO 2009053165A2 EP 2008062157 W EP2008062157 W EP 2008062157W WO 2009053165 A2 WO2009053165 A2 WO 2009053165A2
Authority
WO
WIPO (PCT)
Prior art keywords
sprocket
sprocket according
wheel body
teeth
recesses
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/EP2008/062157
Other languages
German (de)
English (en)
Other versions
WO2009053165A3 (fr
Inventor
Michael Bogner
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
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 WO2009053165A2 publication Critical patent/WO2009053165A2/fr
Publication of WO2009053165A3 publication Critical patent/WO2009053165A3/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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/30—Chain-wheels
    • 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
    • F16H55/02—Toothed members; Worms
    • F16H55/14—Construction providing resilience or vibration-damping
    • F16H55/16—Construction providing resilience or vibration-damping relating to teeth only
    • 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
    • F16H55/02—Toothed members; Worms
    • F16H55/30—Chain-wheels
    • F16H2055/306—Chain-wheels with means providing resilience or vibration damping in chain sprocket wheels

Definitions

  • the invention relates to a sprocket for a Switzerlandstofftheb with radially arranged teeth, which are loaded in the traction drive via the chain.
  • the invention is therefore based on the problem, a sprocket for a traction mechanism, in particular a timing drive of an internal combustion engine, indicate, via which a noise attenuation is possible, and which is improved in terms of a possible chain wear.
  • a sprocket for a traction mechanism in particular a timing drive of an internal combustion engine, indicate, via which a noise attenuation is possible, and which is improved in terms of a possible chain wear.
  • the sprocket is formed in the teeth in such a way that loaded teeth are radially and / or tangentially elastically deformable.
  • a plurality of preferably symmetrically arranged and equidistantly spaced apertures are provided on the disk-shaped wheel body for this purpose. Through these openings, the necessary elasticity in the radial or tangential direction is ensured, since in the region of these openings an elastic material displacement is possible.
  • the openings can be formed as equidistantly spaced, lying on a common radius circular arc-shaped slots, between which webs remain, over which a high torsional rigidity is achieved.
  • the slots in turn ensure the elasticity. It is fundamentally possible to provide several rows of slots at different radii.
  • the openings may also be in the form of round or polygonal, equidistantly spaced recesses which lie on a common radius, with several rows of recesses at different radii being provided here as well.
  • a recess guided under the tooth is provided on the tooth root. That is, the tooth root itself is made significantly narrower by this recess or the connection region of the tooth root to the disk body is significantly shortened via the recess, wherein the recess is open to the side, so that the tooth over a considerable length is virtually self-supporting.
  • the recess may be a slot-shaped passage or a recess extending into the wheel body.
  • the invention relates to a traction mechanism comprising at least one sprocket of the type described.
  • Fig. 3 is a partial view of a sprocket according to the invention with a
  • Fig. 5 is a partial view of a sprocket according to the invention with a guided adjacent to the tooth in the wheel body recess. Detailed description of the drawing
  • openings 5 are provided in the form of circular arc-shaped slots 6 in this embodiment, wherein the slots 6a lie on a larger radius n than the slots 6b, which lie on the smaller radius r 2 . All lying on a common radius slots are equidistant from each other.
  • the arrangement of the slots is here such that the slots 6a engage over two adjacent slots 6b, that is, the slots are offset from each other.
  • FIG. 2 shows a further embodiment of a sprocket 1 according to the invention which, like the sprocket 1 of FIG. 1, consists of a wheel body 2 with teeth 3 formed thereon. Again, a plurality of equidistantly spaced, located on a common radius openings 6 are provided on the wheel body 2, which are here, however, designed as polygonal or asymmetrical openings 6c. These perforations 6c also lead to a certain basic elasticity of the wheel body 2 being achieved, which permits minimal elastic deflection of the teeth in the region in which the chain is loaded (as indicated by the arrows K).
  • the illustrated shapes of the apertures 6a, 6b, 6c are merely exemplary in nature. Of course, the shapes can be chosen arbitrarily freely. The optimal shape is to be determined by a detailed analysis of the real conditions in Werge- or Steuervieb in which the sprocket is to be used, in particular the forces and moments acting.
  • recesses which do not extend through the entire wheel body, but reduce it only locally in its thickness.
  • These recesses can also have any desired shape, for example the shape as illustrated by the apertures in FIGS. 1 and 2.
  • the recesses would be provided on both sides of the wheel body 2.
  • nut-like or bead-like circular-arc-shaped recesses are used, which correspond to the embodiment of FIG. 1 from the viewpoint, they would be provided on the one wheel-body side as shown in FIG. 1, in preferably congruent arrangement and penetration depth on the other side would be the further recesses provided.
  • As a result of the material removal also results in a certain elasticity, which is sufficient for the inventive chain damping.
  • FIG. 3 shows a partial view of a sprocket wheel 1 according to the invention of a third embodiment comprising a wheel body 2 with teeth 3 arranged thereon.
  • the tooth base 4 is tapered compared with the previously described embodiments. This is realized in that a recess 8 in the form of a narrow slot or a passage 8a from the side, that is substantially tangential, is guided under the tooth 3. In this way, the width of the tooth root is significantly reduced, as shown in FIG. 3, furthermore, the tooth root 3 is self-supporting in the undercut region. This results in that the respective tooth 3 is resiliently spring-loaded.
  • the teeth are preferably arranged slightly outside the normal position.
  • the chain force K acts on a tooth 3, then it is elastically deformed, thus springing back around the tooth base 4 as far as the recess depth permits. After deformation, it is in the ideal position, starting from the normal outside position unloaded. The displacement of the tooth 3 can maximally go so far, until the two flanks 9a of the tooth and 9b of the recess are adjacent to each other. After the sprocket 1 normally runs in the oil mist, an oil film between the two flanks 9a, 9b will adjust, which in turn has a damping effect on the tooth displacement.
  • FIG. 4 shows a further embodiment of a sprocket 1 according to the invention with a wheel body 2 and teeth 3 arranged thereon, which are also resiliently spring-mounted on the wheel body 2 via a recess 8, which is guided under the respective tooth 3 ,
  • the action principle is similar to that of the sprocket 1 of FIG. 3.
  • Upon application of the force K through the chain it also comes here to a compression of the tooth in the tangential and radial direction, wherein here due to the recess 8b, the elasticity is slightly larger and, depending on how far the flanks 9a and 9b are spaced, the spring travel is also slightly larger.
  • FIG. 5 shows a fifth embodiment of a sprocket wheel 1 according to the invention.
  • Recesses 8 are provided on the wheel body 2, seen from the direction from which the force K is applied to the teeth 3 subsequently, to the tooth 3, are designed in the form of recesses 8c extending in the wheel body 2.
  • the elasticity of the respective tooth 3 is realized via the recess 8c directly adjoining it, which allows tilting in the tangential / radial direction, essentially following the applied force.

Landscapes

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

Abstract

Roue à chaîne pour une transmission à moyen de traction, avec des dents disposées radialement qui sont sollicitées dans la transmission à moyen de traction par l'intermédiaire de la chaîne. Selon l'invention, la roue à chaîne est, dans la région des dents, conçue de telle sorte que les dents sollicitées (3) peuvent être déformées élastiquement radialement et/ou tangentiellement.
PCT/EP2008/062157 2007-10-18 2008-09-12 Roue à chaîne pour une transmission à moyen de traction Ceased WO2009053165A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007049880.4 2007-10-18
DE200710049880 DE102007049880A1 (de) 2007-10-18 2007-10-18 Kettenrad für einen Zugmitteltrieb

Publications (2)

Publication Number Publication Date
WO2009053165A2 true WO2009053165A2 (fr) 2009-04-30
WO2009053165A3 WO2009053165A3 (fr) 2009-10-29

Family

ID=40043091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/062157 Ceased WO2009053165A2 (fr) 2007-10-18 2008-09-12 Roue à chaîne pour une transmission à moyen de traction

Country Status (2)

Country Link
DE (1) DE102007049880A1 (fr)
WO (1) WO2009053165A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104973202A (zh) * 2014-04-11 2015-10-14 株式会社岛野 自行车链轮
CN105083461A (zh) * 2014-05-20 2015-11-25 株式会社岛野 自行车链轮
CN110915675A (zh) * 2018-09-19 2020-03-27 大荷兰人国际有限公司 用于驱动用于家畜的干料饲喂的链式加料器的驱动轮

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012147085A1 (fr) * 2011-04-28 2012-11-01 Tube Investments Of India Limited Pignon
US9297452B2 (en) 2013-10-01 2016-03-29 Shimano Inc. Bicycle sprocket

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB215082A (en) * 1923-02-01 1924-05-01 Peter Maurice Staunton Improved means for obtaining flexibility in toothed gearing
DE1268447B (de) * 1963-10-21 1968-05-16 Telefunken Patent Zahnrad fuer spielfreien Zahntrieb
JPS6317360U (fr) * 1986-07-18 1988-02-04
DE3906639A1 (de) * 1989-03-02 1990-09-06 Bosch Gmbh Robert Getriebe
US20030083166A1 (en) * 2000-05-10 2003-05-01 Jeff A. Greene Multilayered flexible drive sprocket
JP4460885B2 (ja) * 2003-12-01 2010-05-12 株式会社江沼チヱン製作所 ローラチェーン用のスプロケット
JP2007024275A (ja) * 2005-07-21 2007-02-01 Borg Warner Morse Tec Japan Kk スプロケット

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104973202A (zh) * 2014-04-11 2015-10-14 株式会社岛野 自行车链轮
CN105083461A (zh) * 2014-05-20 2015-11-25 株式会社岛野 自行车链轮
CN110915675A (zh) * 2018-09-19 2020-03-27 大荷兰人国际有限公司 用于驱动用于家畜的干料饲喂的链式加料器的驱动轮
EP3626054B1 (fr) 2018-09-19 2021-06-23 Big Dutchman International GmbH Roue d'entraînement permettant d'entraîner un mangeoire à chaînes pour l'alimentation sèche des animaux d'élevage
US11254509B2 (en) 2018-09-19 2022-02-22 Big Dutchman International Gmbh Drive wheel for driving a feed chain for the dry feeding of livestock

Also Published As

Publication number Publication date
DE102007049880A1 (de) 2009-04-23
WO2009053165A3 (fr) 2009-10-29

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