EP3859128A1 - Dispositif de décalage de phase d'un angle de rotation d'une partie d'entraînement vers une partie entraînée - Google Patents

Dispositif de décalage de phase d'un angle de rotation d'une partie d'entraînement vers une partie entraînée Download PDF

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Publication number
EP3859128A1
EP3859128A1 EP21154669.2A EP21154669A EP3859128A1 EP 3859128 A1 EP3859128 A1 EP 3859128A1 EP 21154669 A EP21154669 A EP 21154669A EP 3859128 A1 EP3859128 A1 EP 3859128A1
Authority
EP
European Patent Office
Prior art keywords
gear
eccentric
elastomer
double
double gear
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.)
Pending
Application number
EP21154669.2A
Other languages
German (de)
English (en)
Inventor
Martin Nowak
Michael Breuer
Philipp HERTEN
Benjamin Simon
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP3859128A1 publication Critical patent/EP3859128A1/fr
Pending legal-status Critical Current

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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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/352—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
    • 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
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0476—Camshaft bearings
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/02—Camshaft drives characterised by their transmission means the camshaft being driven by chains
    • 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
    • F01L2301/00—Using particular materials

Definitions

  • the invention relates to a device for phase shifting an angle of rotation of a drive part to an output part, with a double gear, which has an externally toothed, first gear and an externally toothed, second gear, the two gears are non-rotatably connected to one another, an internally toothed, first ring gear, which with the drive part is rotatably connected and is operatively connected to the externally toothed, first gear, an internally toothed, second ring gear, which is rotatably connected to the output part and is operatively connected to the externally toothed, second gear, and an eccentric on which the double gear rotates via a bearing element is mounted, wherein at least one elastomer element is arranged radially between the double gear and the eccentric.
  • Such devices are known in particular for phase shifting between a crankshaft and a camshaft.
  • the phase shift is used to control the opening and closing times of the intake and exhaust valves of an internal combustion engine, which improves the gas exchange process.
  • eccentric gears are often used, which are usually designed with an eccentric. Two externally toothed gears that are firmly connected to one another are mounted on an eccentric, a first externally toothed gear with a drive ring gear and a second, externally toothed gear with a Output ring gear are in engagement.
  • the eccentric is driven by an actuator, the magnitude of the phase shift and the direction of the phase shift being set by the rotational speed of the eccentric.
  • a device for phase shifting an angle of rotation of a drive part with respect to an output part is disclosed, for example, in US Pat JP 2012-092720 .
  • the device has a driven drive part, a driven part and an eccentric gear.
  • the eccentric gear includes an eccentric, on the outer surface of which a double gear with two different external gears is rotatably mounted.
  • a first external toothing is operatively connected to a first, internally toothed ring gear and a second external toothing is operatively connected to a second, internally toothed ring gear.
  • the first ring gear is connected to the drive part and the second ring gear is firmly connected to the driven part.
  • an elastomer element is provided radially between the eccentric and the double gear.
  • the elastomer element is deformed and preloaded during the assembly process, so that the elastomer element radially preloads the double gearwheel in the assembled state.
  • the elastomer element has a hollow cylindrical shape and is held in its mounted position radially and axially by pressing between a bearing element and the eccentric or the double gear wheel.
  • a disadvantage of such a configuration of the device for phase shifting is that the elastomer element can move axially during operation of the device, since the compression of the elastomer element does not result in an axial displacement of the elastomer element can reliably prevent. If the elastomer element is displaced, there is a risk that the elastomer element and the entire device will be damaged.
  • the double gear wheel can tilt due to the axial displacement of the elastomer element and thereby cause the gear wheels to jam. Furthermore, due to the axial displacement of the elastomer element, the predefined radial tension between the external toothing of the double gear and the internal toothing of the ring gears cannot be guaranteed.
  • the invention is therefore based on the object of providing a device for phase shifting an angle of rotation of a drive part with respect to an output part, in which proper operation can be ensured over the entire service life and damage to the device can be reliably prevented.
  • the eccentric or the double gear wheel have a groove, the at least one elastomer element being arranged in the groove, the elastomer element is securely and reliably held in a predefined, axial position and tilting of the double gear wheel due to undesired displacement of the elastomer element is reliably prevented.
  • the elastomer element is axially fixed in a form-fitting manner on the eccentric or the double gear wheel, the elastomer element being pressed radially into the groove in its assembled state. In this way, the elastomer element is reliably prevented from sliding out of the groove. This ensures the preload between the double gear and the ring gears reliably over the entire service life and reliably prevents damage to the device due to displacement of the elastomer element.
  • the elastomer element is preferably arranged radially between the bearing element and the double gear, the groove being provided on an inner circumferential surface of the double gear facing the eccentric.
  • the elastomer element is arranged radially between the eccentric and the bearing element, the groove being provided on an outer circumferential surface of the eccentric facing the double gearwheel.
  • the eccentric has a sleeve which is arranged on the outer circumferential surface, the elastomer element being arranged radially between the outer circumferential surface and the sleeve.
  • the elastomer element can be positioned and fixed on the eccentric even before the final assembly of the device.
  • the outer circumferential surface of the sleeve also serves as the inner race of the bearing element designed as a roller bearing. As a result, the radial installation space of the device can be reduced.
  • the elastomer element is made of a fluorine rubber or a hydrogenated acrylonitrile butadiene rubber, the hydrogenated acrylonitrile butadiene rubber having a relatively high heat resistance, good mechanical properties and good aging resistance.
  • the elastomer element is an O-ring, whereby the assembly of the elastomer element can be simplified.
  • the elastomer element preferably has a first surface facing the double gearwheel and a second surface facing the eccentric, at least one of the two surfaces being embodied in a wave-like manner. In a preferred embodiment, both surfaces are designed to be wave-like. In the assembled state, the elastomer element rests with the deformed tips of the wave-like surface on the double gearwheel and / or the eccentric. In this way, the double gear wheel is evenly pretensioned over the circumference and overloading of the elastomer element is reliably prevented.
  • Two elastomer elements are preferably provided, which are arranged axially spaced from one another.
  • the relatively wide double gear can be radially evenly pretensioned and tilting of the double gear can be reliably prevented.
  • a rotation of the double gear about a vertical axis is reduced, the rotation resulting from the fact that different loads resulting from the toothing act on the first externally toothed gear and the second externally toothed gear.
  • the two elastomer elements can be made in one piece, the two elastomer elements being axially coupled to one another via a connecting element made in one piece with the elastomer elements.
  • the two elastomer elements are each arranged in a separate groove, whereby both elastomer elements can be held safely and reliably in a predefined, axial position.
  • a sheet-metal spring element is preferably arranged radially between the eccentric and the double gear wheel, the sheet-metal spring element loading the double gear wheel radially.
  • the sheet-metal spring element loads the double gear wheel radially in the same direction as the elastomer element and thus supports the elastomer element when the double gear wheel is radially pretensioned.
  • the section arranged axially between the two grooves preferably serves as a radial stop, the stop limiting compression of the elastomer elements and thereby reliably preventing overloading of the elastomer elements.
  • the sheet-metal spring element and the elastomer element together form a spring system for the radial preloading of the double gear wheel, the sheet-metal spring element having a spring characteristic such that the spring force of the sheet-metal spring element increases from a predefined spring travel, thereby preventing damage to the elastomer element.
  • the bearing element is a needle bearing, as a result of which the radial installation space of the device can be reduced.
  • the double gear is preferably made in one piece, the externally toothed first gear being made in one piece with the externally toothed second gear.
  • a device which reliably ensures the preload between the double gear and the ring gears over the entire service life in a simple and inexpensive manner, in that an undesired displacement of the elastomer element is reliably prevented by arranging the elastomer element in a groove.
  • the Figure 1 shows an embodiment according to the invention of a device for phase shifting a driven part to a drive part in a sectional view
  • the Figure 2 shows an elastomer element of the device according to the invention from Figure 1 .
  • the device shown comprises a drive part 2 and a driven part 4.
  • the driven part 4 is connected in a rotationally fixed manner to a camshaft 6 via a screw 5, a screw shaft of the screw 5 extending through an opening 7 provided on the driven part 4 and being screwed into the camshaft 6 .
  • the drive part 2 has a sprocket 8 on an outer surface, which is produced in one piece with the drive part 2.
  • a chain drive (not shown) engages the chain wheel 8, which connects the chain wheel 8 to a crankshaft (also not shown) and transmits a rotational movement of the crankshaft to the drive part 2.
  • the eccentric gear 16 is arranged on the side of the drive part 2 radially facing away from the sprocket 8.
  • the eccentric gear 16 has a first gear pair 18 and a second gear pair 20.
  • the first gear pair 18 comprises an internally toothed, first ring gear 22 and an externally toothed, first gear 24.
  • the internally toothed, first ring gear 22 is on the side of the drive part facing away from the sprocket 8 2 and is made in one piece with the drive part 2.
  • the externally toothed first gear 24 forms, together with an externally toothed second gear 26, a double gear 25, the two externally toothed gears 24, 26 being non-rotatably connected to one another and rotating with one another.
  • the externally toothed, second gear 26 meshes with an internally toothed, second ring gear 28 which is connected to the output part 4 in a rotationally fixed manner and, together with the externally toothed second gear 26, forms the second gear pair 20.
  • the double gear 25 is designed in such a way that the externally toothed, first gear 24 has an axially extending stub 27 on which the externally toothed, second gear 26 is pushed.
  • the non-rotatable connection between the first and second externally toothed gear 24, 26 can be established, for example, via a toothing or a press fit.
  • the double gear 25 is rotatably mounted on an eccentric 32 driven by a drive unit.
  • the eccentric 32 is a one-piece internal eccentric which is rotatably mounted via a needle bearing 40 on an outer circumferential surface of a bearing stub 42 formed on the driven part 4.
  • the inner running surface 44 of the needle bearing 40 is formed by the outer circumferential surface of the bearing stub 42.
  • the outer running surface 46 of the needle bearing 40 forms the inner circumferential surface of the eccentric 32.
  • the rotatable mounting of the double gear 25 on the eccentric 32 takes place via a needle bearing 48 arranged radially between the double gear 25 and the eccentric 32, the outer running surface 50 being formed by the inner circumferential surface of the double gear 25.
  • the inner running surface 52 of the needle bearing 48 forms an outer circumferential surface a sleeve 54 which is arranged on an outer circumferential surface of the eccentric 32.
  • Two elastomer elements 60, 62 and a sheet-metal spring element 64 are provided radially between the sleeve 54 and the outer circumferential surface, the elastomer elements 60, 62 and the sheet-metal spring element 64 loading the double gear 25 radially.
  • the play between the two externally toothed gears 24, 26 and the corresponding internally toothed ring gears 22, 28 can be compensated for by the radial load.
  • the double gear 25 is damped radially by the elastomer elements 60, 62.
  • the sheet metal spring element 64 has a wave-like cross section and is arranged in a recess 66 provided on the outer circumferential surface of the eccentric 32.
  • the two elastomer elements 60, 62 are shown in FIG Figure 2 shown and are designed as O-rings.
  • the elastomer elements 60, 62 each have a surface 70 facing the eccentric 32 and a surface 68 facing the double gear 25. Both surfaces 68, 70 have a wave-like shape. Due to the wave-like shape of the surfaces 68, 70, the elastomer elements 60, 62 in the final assembled state rest with the corresponding tips of the wave-like surfaces 68, 70 on the sleeve 54 and the eccentric 32.
  • the elastomer elements 60, 62 are each arranged in a groove 72, 74 produced on the outer circumferential surface of the eccentric 32.
  • the two grooves 72, 74 are arranged axially spaced apart from one another and have an annular cross-section.
  • the recess 66 and the sheet-metal spring element 64 are arranged axially between the two spaced apart grooves 72, 74.
  • the grooves 72, 74 extend over the entire circumference of the outer peripheral surface of the eccentric 32, so that the ring-like elastomer elements 60, 62 are arranged over the entire circumference in the grooves 72, 74.
  • the elastomer elements 60, 62 Due to the arrangement of the elastomer elements 60, 62 in the grooves 72, 74, the elastomer elements 60, 62 are reliably held axially in their predefined axial positions. This prevents undesired axial movement of the elastomer elements 60, 62.
  • eccentric 32 or the elastomer elements 60, 62 can be designed differently.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Retarders (AREA)
  • Gears, Cams (AREA)
EP21154669.2A 2020-02-03 2021-02-02 Dispositif de décalage de phase d'un angle de rotation d'une partie d'entraînement vers une partie entraînée Pending EP3859128A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020102632.3A DE102020102632B4 (de) 2020-02-03 2020-02-03 Vorrichtung zur Phasenverschiebung eines Drehwinkels eines Antriebsteils zu einem Abtriebsteil

Publications (1)

Publication Number Publication Date
EP3859128A1 true EP3859128A1 (fr) 2021-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21154669.2A Pending EP3859128A1 (fr) 2020-02-03 2021-02-02 Dispositif de décalage de phase d'un angle de rotation d'une partie d'entraînement vers une partie entraînée

Country Status (2)

Country Link
EP (1) EP3859128A1 (fr)
DE (1) DE102020102632B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023134864A1 (fr) * 2022-01-14 2023-07-20 Pierburg Gmbh Dispositif de décalage de phase de l'angle de rotation d'un élément d'entraînement par rapport à un élément de sortie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020100446A1 (en) * 2001-01-31 2002-08-01 Unisia Jecs Corporation Valve timing control device fo internal combustion engine
DE102008053913A1 (de) * 2008-10-30 2010-05-12 Ovalo Gmbh Lageranordnung zur Lagerung des Wellengenerators eines Spannungswellengetriebes, Spannungswellengetriebe sowie Vorrichtung zum Überlagern von Bewegungen
DE102009009523A1 (de) * 2009-02-18 2010-08-19 Schaeffler Technologies Gmbh & Co. Kg Phasenstellanordnung einer Brennkraftmaschine
JP2012092720A (ja) 2010-10-26 2012-05-17 Denso Corp 可変バルブタイミング装置
JP2012092721A (ja) * 2010-10-26 2012-05-17 Denso Corp 可変バルブタイミング装置
DE102015102543B3 (de) * 2015-02-23 2016-05-04 Pierburg Gmbh Vorrichtung zur Phasenverschiebung des Drehwinkels eines Antriebsteils zu einem Abtriebsteil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007263027A (ja) 2006-03-29 2007-10-11 Denso Corp バルブタイミング調整装置
JP5628593B2 (ja) 2010-08-17 2014-11-19 株式会社ブリヂストン プレキュアトレッド及びプレキュアトレッドを用いた更生タイヤ
DE102016104292B4 (de) 2016-03-09 2018-11-08 Pierburg Gmbh Exzenter und Vorrichtung zur Phasenverschiebung eines Drehwinkels eines Antriebsteils zu einem Abtriebsteil
JP6869465B2 (ja) 2017-03-28 2021-05-12 アイシン精機株式会社 ギヤ減速装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020100446A1 (en) * 2001-01-31 2002-08-01 Unisia Jecs Corporation Valve timing control device fo internal combustion engine
DE102008053913A1 (de) * 2008-10-30 2010-05-12 Ovalo Gmbh Lageranordnung zur Lagerung des Wellengenerators eines Spannungswellengetriebes, Spannungswellengetriebe sowie Vorrichtung zum Überlagern von Bewegungen
DE102009009523A1 (de) * 2009-02-18 2010-08-19 Schaeffler Technologies Gmbh & Co. Kg Phasenstellanordnung einer Brennkraftmaschine
JP2012092720A (ja) 2010-10-26 2012-05-17 Denso Corp 可変バルブタイミング装置
JP2012092721A (ja) * 2010-10-26 2012-05-17 Denso Corp 可変バルブタイミング装置
DE102015102543B3 (de) * 2015-02-23 2016-05-04 Pierburg Gmbh Vorrichtung zur Phasenverschiebung des Drehwinkels eines Antriebsteils zu einem Abtriebsteil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023134864A1 (fr) * 2022-01-14 2023-07-20 Pierburg Gmbh Dispositif de décalage de phase de l'angle de rotation d'un élément d'entraînement par rapport à un élément de sortie

Also Published As

Publication number Publication date
DE102020102632B4 (de) 2023-11-09
DE102020102632A1 (de) 2021-08-05

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