WO2005080770A2 - Transmission par elements de traction flexibles de moteur a combustion interne - Google Patents

Transmission par elements de traction flexibles de moteur a combustion interne Download PDF

Info

Publication number
WO2005080770A2
WO2005080770A2 PCT/EP2005/000414 EP2005000414W WO2005080770A2 WO 2005080770 A2 WO2005080770 A2 WO 2005080770A2 EP 2005000414 W EP2005000414 W EP 2005000414W WO 2005080770 A2 WO2005080770 A2 WO 2005080770A2
Authority
WO
WIPO (PCT)
Prior art keywords
traction
drive according
internal combustion
combustion engine
tensioning rail
Prior art date
Application number
PCT/EP2005/000414
Other languages
German (de)
English (en)
Other versions
WO2005080770A3 (fr
Inventor
Rainer Schenk
Martin Assel
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 WO2005080770A2 publication Critical patent/WO2005080770A2/fr
Publication of WO2005080770A3 publication Critical patent/WO2005080770A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • 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
    • F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
    • F16H2007/026—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts with belts running in a mist of oil
    • 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
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/087—Sprockets

Definitions

  • the present invention relates to a traction mechanism drive for an internal combustion engine, the traction mechanism connecting an endless belt, an output gear and at least one drive gear.
  • a belt wheel connected to the crankshaft of the internal combustion engine is provided as the driven wheel.
  • the drive wheel which is connected to a camshaft of the internal combustion engine and is assigned to the end of the camshaft, is driven.
  • a traction mechanism drive of an internal combustion engine known as a control drive, is known, in which a toothed belt rotating in an oil bath is provided for driving the camshaft.
  • the known traction mechanism includes drive wheels which are spatially closely associated with the driven wheel, without a tensioning device for the traction device.
  • the patent US 6,000,373 shows a further control drive for an internal combustion engine, in which the traction means connects the driven wheel connected to the crankshaft to a drive wheel assigned to the camshaft.
  • This control drive also includes the drive of a lubricating oil pump immersed in an oil bath, the drive wheel of which is non-positively or positively connected to the traction means in the region of the driven wheel.
  • the externally toothed drive wheel of the oil pump engages in an outer toothing of the toothed belt toothed on both sides.
  • the train is now tel always at least in the operating state of the internal combustion engine with oil.
  • the traction mechanism drive does not include a separate tensioning device which influences the pretensioning of the traction mechanism. Summary of the invention
  • a tensioning rail is provided as the tensioning device, which is pivotable about an axis of rotation and acted upon by a power means.
  • the structure of the tensioning rail further comprises at least one rotatably mounted guide roller, by means of which the tensioning rail is supported on the traction means.
  • This tensioning device according to the invention is preferably suitable for combination with a traction drive which is arranged in an encapsulated or closed separate installation space of the internal combustion engine.
  • the tensioning device according to the invention advantageously reduces the friction associated with a consumption advantage of the internal combustion engine. Furthermore, this tensioning device promotes the wear behavior of the traction mechanism and reduces the running noise of the traction mechanism drive.
  • the traction mechanism drive according to the invention in connection with the tensioning device advantageously enables the traction mechanism to be exchanged. This means that the vehicle manufacturer or the customer can replace the traction device used as a chain with an endless belt if required. Because the installation position is protected from environmental influences in the installation space, the endless belt achieves a service life corresponding to the chain, with the maintenance-free belt drive advantageously having a lower noise level and a cost advantage. Further advantageous refinements are the subject of dependent claims 2 to 16.
  • a preferred construction of the tensioning rail provides for the end of the latter to be provided with a rotary bearing enclosing an axis of rotation. Furthermore, the tensioning rail is assigned a power means which interacts with the tensioning rail at a distance from the axis of rotation. To achieve a small-sized power means, it is advisable to place it at a maximum distance from the pivot bearing of the tensioning rail, as a result of which a high adjustment torque can be achieved with a relatively low actuating force in conjunction with a relatively long lever arm.
  • the tensioning rail provides for it to be provided with two widely spaced guide rollers.
  • the wrap angle of the traction means on the driven wheel and / or the drive wheel can thus be influenced.
  • the invention further includes providing the tensioning rail with more than two guide rollers, for example for a sickle-shaped tensioning rail, in order, for example, to implement a targeted traction means guidance determined by the motor contour.
  • the invention includes a roller-mounted guide roller or guide rollers which are enclosed with a plastic roller.
  • a suitable design of the guide roller is, for example, a plastic-coated outer bearing ring of the rolling bearing.
  • the tensioning rail comprises a one-piece sheet metal body with a largely U-shaped structure.
  • a tensioning rail preferably comprises two axially spaced cheeks, which are fixed by connecting webs and can be referred to as flat profiles.
  • the sheet metal body also serves to receive bearing bolts on which the guide rollers are rotatably arranged.
  • the base part of the tensioning rail is provided with a device or a support on which the power means is supported.
  • a connecting bar takes on a double function, ie in addition to connecting the two flat profiles of the tensioning rail, the power means is articulated on the connecting bar at the same time.
  • both flat profiles of the tensioning rail have a bore for the axis of rotation, in order to form a pivot bearing, for example with the crankcase of the internal combustion engine.
  • the invention includes, as an alternative to a sheet metal body, a tensioning rail designed as a plastic injection molded part.
  • a tensioning rail designed as a plastic injection molded part.
  • a suitable high-strength plastic is used, for example Kevlar or a plastic reinforced with glass fibers, preferably PA-66.
  • the tensioning device is preferably in operative connection with a hydraulically acting force means.
  • the power means comprises a housing which is fixed in place, in particular detachably attached to the internal combustion engine, in which a piston which is acted upon by a spring means and a hydraulic fluid and which cooperates directly or indirectly with the tensioning rail can be displaced.
  • Pressure oil circulation lubrication of the internal combustion engine is preferably suitable as a suitable hydraulic fluid for acting on the piston of the power means. The existing pressure of the circulating lubrication is sufficient for the hydraulic power medium to achieve sufficient pre-tensioning of the traction means.
  • a spring can be used as the force means, for example a helical spring, which on the one hand is fixed in place, for example supported on the internal combustion engine, and whose further end is fastened to the tensioning rail according to the invention.
  • the tensioning device according to the invention can also be combined with an electrically controllable actuator.
  • a ball screw actuated by an electric servomotor is preferably suitable for such a power means, the actuation of the servomotor interacting with a regulating or control unit.
  • Such a power means enables one in dependence variable pre-tensioning of the traction device depending on operating parameters or definable operating cycles.
  • the tensioning device according to the invention can be used for traction mechanism drives, the traction means of which partially circulates in an oil bath or is caused by an oil mist.
  • the tensioning rail is provided with openings. These enable, for example, an improved circulation of the oil mist in the area of the guide roller, which reduces the rolling contact and the associated contact friction between the traction means and the guide roller.
  • the tensioning device can preferably be used in control drives of internal combustion engines which are intended to drive one or more camshafts.
  • the tensioning device according to the invention is suitable for a so-called unit drive.
  • This traction mechanism drive is provided for driving different units of the internal combustion engine, such as, for example, water pump, power steering pump, generator or air conditioning compressor.
  • the invention includes a traction mechanism made of an oil-resistant material, for which purpose, for example, an elastomeric material mass or polyurethane is suitable.
  • the tensioning device according to the invention is intended in particular for traction mechanism drives which are arranged in a sealed installation space upstream of the internal combustion engine.
  • FIG. 1 shows a traction drive including the tensioning device according to the invention in the installed state
  • FIG. 2 shows the traction mechanism drive according to FIG. 1 in an individual illustration
  • Figure 3 shows a clamping rail of the clamping device according to the invention as a single part in a perspective
  • FIG. 4 shows the tensioning rail of the tensioning device according to the invention in a further perspective
  • FIG. 5 shows a detail of a traction mechanism drive in connection with the tensioning device according to the invention, which comprises an actuator. Detailed description of the drawings
  • a traction mechanism drive 1 in the installed state as part of an internal combustion engine 2.
  • a traction mechanism 3 designed as an endless belt connects an output gear 4, i.e. a belt wheel connected directly to a crankshaft of the internal combustion engine 2, with two drive wheels 5a, 5b, each of which is assigned to a camshaft of the internal combustion engine 2.
  • the traction mechanism drive 1, which can also be referred to as a control drive, is arranged in a closed installation space 6 on the front side of the internal combustion engine 2.
  • the installation space 6, which is advantageously connected to a crank chamber of the internal combustion engine 2 through openings 7, 8, ensures that oil mist or directly from the lubricating oil of the internal combustion engine 2 passes into the installation space 3.
  • a tensioning device 10 is assigned to the traction mechanism drive 1 and comprises a tensioning rail 9 which can be pivoted about an axis of rotation 11. At the end remote from the axis of rotation 11, the tensioning rail 9 is supported on a force means 12 from which the tensioning rail 9 receives a clockwise force pulse, in order to achieve a sufficient preload of the traction device 3.
  • the tensioning device 10 is assigned to the empty run of the traction device drive 1 rotating in the clockwise direction.
  • FIG. 2 shows the traction mechanism drive 1 in connection with all associated components, without the internal combustion engine 2 shown in detail in FIG. 1.
  • the tensioning device 10 is provided between the axis of rotation 11 and the point of application of the power means 12 with two spaced-apart guide rollers 13a, 13b, on which the traction device 3 is guided.
  • the traction of the traction device 3 is guided between the drive wheel 5b and the driven wheel 4 on a deflection roller 14, which ensures, for example, that the traction device 3 is guided by the design of the installation space 6 and also the wrap angle of the traction device 3 on the driven wheel 4 and the drive wheel 5b affected.
  • the traction means 3 wetted by at least one oil mist results in a desired friction-reducing contact on the guide rollers 13a, 13b and the deflection roller 14, which advantageously reduces the fuel consumption of the internal combustion engine 2, the wear of the traction means 3 and also reduces the noise development of the traction mechanism drive 1.
  • a hydraulic actuator is provided as the power means 12, which is preferably acted upon by the pressure of the circulating oil lubrication of the internal combustion engine 2, the tensioning rail 9 in the direction of the arrow, ie. H. starting from the axis of rotation 11, pivots clockwise to the traction means 3.
  • the power means 12 further includes a compression spring which always ensures a non-positive support of the tensioning rail 9 on the traction means 3, regardless of the lubricating oil pressure.
  • FIGS 3 and 4 show the clamping rail 9 as an individual part in each case in a perspective.
  • the structure of the tensioning rail 9 comprises two axially spaced flat profiles 15a, 15b, which are connected at the ends by connecting webs 16a, 16b.
  • a suitable high-strength plastic is used for this, for example a plastic reinforced with glass fibers such as PA-66 or Kevlar.
  • the guide rollers 13a, 13b which are arranged between the flat profiles 15a, 15b and are intended for the traction means, are rotatably mounted on associated bearing bolts 17a, 17b. Both guide rollers 13a, 13b preferably have a plastic casing, designed as a roller 18a, 18b.
  • the flat profiles 15a, 15b which are also referred to as cheeks of the tensioning rail 9, are further provided with openings 19a, 19b which bring about an improved oil or oil mist circulation.
  • the connecting web 16a is also designed such that it forms a support surface for the power means 12.
  • FIG. 5 shows the tensioning device 20, the tensioning rail of which interacts with an electrically controllable force means 22.
  • This power means 22, which can be referred to as an actuator, is designed as a ball screw drive which is adjustable by means of a servomotor 21.

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 une transmission par éléments de traction flexibles (1), montée dans un logement (6) fermé de moteur à combustion interne (2). Un dispositif de contrainte (10) associé comprend une glissière de serrage (9) qui peut pivoter autour d'un axe de rotation (11), au moyen d'un élément mécanique (12), l'élément de traction (3) étant guidé par l'intermédiaire de deux galets de guidage (13a, 13b) de la glissière de serrage (9).
PCT/EP2005/000414 2004-02-21 2005-01-18 Transmission par elements de traction flexibles de moteur a combustion interne WO2005080770A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004008683.4 2004-02-21
DE200410008683 DE102004008683A1 (de) 2004-02-21 2004-02-21 Zugmitteltrieb einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
WO2005080770A2 true WO2005080770A2 (fr) 2005-09-01
WO2005080770A3 WO2005080770A3 (fr) 2008-12-11

Family

ID=34832946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/000414 WO2005080770A2 (fr) 2004-02-21 2005-01-18 Transmission par elements de traction flexibles de moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE102004008683A1 (fr)
WO (1) WO2005080770A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008009544A1 (fr) * 2006-07-18 2008-01-24 Schaeffler Kg mÉcanisme de traction lubrifiÉ À l'huile d'un moteur À combustion interne
EP2063150A3 (fr) * 2007-11-22 2011-11-02 Bayerische Motoren Werke Aktiengesellschaft Dispositif de serrage pour entraînement d'arbre à cames d'un moteur à combustion interne
EP3076047A4 (fr) * 2013-11-28 2016-12-21 Ntn Toyo Bearing Co Ltd Guide-chaîne et dispositif d'entraînement à chaîne

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036959A1 (fr) * 2005-09-27 2007-04-05 Dayco Europe S.R.L. Con Unico Socio Courroie d'entraînement à utiliser dans de l'huile, avec sabot
DE102006058960A1 (de) * 2006-12-14 2008-06-19 Schaeffler Kg Zugmitteltrieb für eine Brennkraftmaschine
DE102013216806A1 (de) * 2013-08-23 2015-02-26 Schaeffler Technologies Gmbh & Co. Kg Spann- oder Führungsschiene für einen Zugmitteltrieb an einem Verbrennungsmotor eines Fahrzeugs

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434428A1 (de) 1984-09-19 1986-03-20 moto-spezial, 7420 Münsingen Steuerungsantrieb bei brennkraftmaschinen
US6000373A (en) 1995-11-09 1999-12-14 Stephen Ronald Tickner (a part interest) Engine lubrication system

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US3977266A (en) * 1975-07-28 1976-08-31 Rohr Industries, Inc. Multiple belt tension control mechanism
US4878461A (en) * 1987-02-24 1989-11-07 Siemens-Bendix Automotive Electronics L.P. Variable camshaft timing system
DE3738895A1 (de) * 1987-11-16 1989-06-08 Klifa Gmbh & Co Kettenspanner
JPH10311392A (ja) * 1997-05-12 1998-11-24 Tsubakimoto Chain Co テンショナレバー装置
DE19731808A1 (de) * 1997-07-24 1999-01-28 Bayerische Motoren Werke Ag Kettentrieb-Einheit für eine Brennkraftmaschine
JP4394815B2 (ja) * 2000-09-18 2010-01-06 本田技研工業株式会社 エンジンにおけるタイミングチェーン潤滑構造
DE10247419A1 (de) * 2002-10-11 2004-04-22 Daimlerchrysler Ag Umschlingungsgetriebe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434428A1 (de) 1984-09-19 1986-03-20 moto-spezial, 7420 Münsingen Steuerungsantrieb bei brennkraftmaschinen
US6000373A (en) 1995-11-09 1999-12-14 Stephen Ronald Tickner (a part interest) Engine lubrication system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008009544A1 (fr) * 2006-07-18 2008-01-24 Schaeffler Kg mÉcanisme de traction lubrifiÉ À l'huile d'un moteur À combustion interne
EP2063150A3 (fr) * 2007-11-22 2011-11-02 Bayerische Motoren Werke Aktiengesellschaft Dispositif de serrage pour entraînement d'arbre à cames d'un moteur à combustion interne
EP3076047A4 (fr) * 2013-11-28 2016-12-21 Ntn Toyo Bearing Co Ltd Guide-chaîne et dispositif d'entraînement à chaîne
US9885401B2 (en) 2013-11-28 2018-02-06 Ntn Corporation Chain guide and chain transmission device

Also Published As

Publication number Publication date
WO2005080770A3 (fr) 2008-12-11
DE102004008683A1 (de) 2005-09-08

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