EP3911845B1 - Wellgetriebe - Google Patents

Wellgetriebe Download PDF

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Publication number
EP3911845B1
EP3911845B1 EP19836787.2A EP19836787A EP3911845B1 EP 3911845 B1 EP3911845 B1 EP 3911845B1 EP 19836787 A EP19836787 A EP 19836787A EP 3911845 B1 EP3911845 B1 EP 3911845B1
Authority
EP
European Patent Office
Prior art keywords
antitwist
ring
drive
harmonic drive
fitting
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.)
Active
Application number
EP19836787.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3911845C0 (de
EP3911845A1 (de
Inventor
Daniel Heise
Marco HILDEBRAND
Bastian Hain
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co 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 Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP3911845A1 publication Critical patent/EP3911845A1/de
Application granted granted Critical
Publication of EP3911845C0 publication Critical patent/EP3911845C0/de
Publication of EP3911845B1 publication Critical patent/EP3911845B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L1/34—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
    • F01L1/46—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
    • F01L2001/3521—Harmonic drive of flexspline type
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/02—Initial camshaft settings

Definitions

  • the invention relates to a wave gear suitable for use as an actuator of an electromechanical camshaft adjuster.
  • the invention further relates to a method for securing a wave gear against adjustment, in particular during transport or during assembly.
  • a camshaft adjuster which can be secured against unintentional adjustment using an anti-twist device.
  • the anti-rotation device of the known camshaft adjuster includes a spring that preloads the actuating gear.
  • the actuating gear of the camshaft adjuster is designed as a wave gear with a flex ring as an elastic gear element.
  • phase adjuster for internal combustion engines that is to say a camshaft adjuster, with a locking element is known.
  • the locking element When operating this camshaft adjuster, the locking element remains in a park position.
  • the locking element can be moved from its locking position to the parking position using compressed oil or air.
  • More camshaft adjusters are in DE 10 2016 204 426 A1 and US 2017/0 145 873 A1 shown.
  • the actuator after DE 10 2016 207 927 A1 includes a thrust washer that acts as an integrated transport lock and prevents the wave generator from falling out. However, as part of the actuator, it cannot be used to fix the relative pre-positioning of the components of the wave gear.
  • the invention is based on the object of specifying a wave gear that has been further developed compared to the prior art mentioned and can be secured against unintentional adjustment, whereby the anti-rotation device is particularly easy to handle and interventions in the structure of components of the wave gear should be avoided as far as possible.
  • the wave gear comprises three connecting elements, namely a drive element in the form of a housing which can be rotated as a whole, an output element to be connected to the shaft to be adjusted, in particular a camshaft, and an adjusting element, as well as an operating element between two of the three connecting elements Anti-twist device.
  • the anti-rotation device comprises a securing element that is concentric to all of the connecting elements and interacts positively with one of the three connecting elements and non-positively with another connecting element. It has been shown that both an effective anti-twist protection can be achieved and that conventional wave gears can be secured against adjustment, especially during transport or during assembly, without geometric modification of any components.
  • the securing element is a securing ring, in particular made of plastic, which can be placed in such a way that it interacts non-positively with the drive element and positively with the adjusting element.
  • a form-fitting anti-rotation contour is preferably formed on the side of the adjusting element by two bolts, which are fixed to an inner ring a wave generator of the wave gear are connected.
  • the two bolts can be part of an Oldham coupling, which, as a compensating coupling, compensates for an axial offset between the wave gear and an electric motor driving the adjusting element, that is, the inner ring of the wave generator including the bolt.
  • the locking ring can be produced efficiently by injection molding.
  • the locking ring is profiled in a U-shape.
  • the locking ring forms a positive anti-rotation contour, which interacts directly with the bolts of the adjusting element, by a corrugated, inner section of the U-profile of the locking ring.
  • the locking ring in this embodiment has a smooth, outer section of the U-profile, which is provided for non-positive anti-rotation protection relative to the drive element, that is, the housing of the wave gear.
  • a radially outwardly directed flange is preferably formed on the U-profile described by the locking ring, which rests against an end face of the drive element when the locking ring is inserted.
  • a tab suitable for manually removing the locking ring from the connecting elements can be formed on this flange.
  • the retaining ring has the advantage that it can be placed between the elements mentioned in any position of the adjusting element relative to the drive element.
  • the locking ring itself can also be in any angular position.
  • a defined angular relationship between the drive element and the output element of the wave gear can first be set and held with the help of the locking ring.
  • the angular position of the adjusting element is irrelevant at this moment.
  • the compensating clutch and the electric motor must then be attached to the adjusting element. This is only possible after the locking ring has been removed from the shaft gear, which can be done easily without tools. Assembling the electric motor with the wave gear locked is therefore fundamentally impossible.
  • twist angle locking realized with the help of the non-positive/positive locking ring, which is equally effective in every angular position of the elements to be locked relative to one another, is also suitable for use in an automated production line.
  • the method with which the wave gear is secured against adjustment is characterized in that a locking ring is inserted between the adjusting element and the housing of the wave gear in such a way that at the same time there is a non-positive connection between the lock ring and the housing and a positive connection between the Circlip and the adjusting element is produced.
  • the wave gear is not only suitable for use in an electromechanical camshaft adjuster, but also for industrial applications, for example in an industrial robot or in a machine tool.
  • a wave gear marked overall with the reference number 1, is part of an electric camshaft adjuster, not shown, which is used for the adjustment a camshaft of an internal combustion engine, namely a reciprocating piston engine, in relation to its crankshaft.
  • an electric camshaft adjuster not shown, which is used for the adjustment a camshaft of an internal combustion engine, namely a reciprocating piston engine, in relation to its crankshaft.
  • the wave gear 1 used as an actuator is a three-shaft gear.
  • Three elements that can be rotated about a common axis, namely the axis of rotation of the camshaft, and each interact directly with external components, i.e. components that are not attributable to the wave gear 1, are generally referred to as connecting elements 2, 9, 13.
  • the drive element 2 is constructed in several parts and includes a chain wheel 3, which is driven by the crankshaft during operation of the camshaft adjuster, rotating at half the crankshaft speed.
  • the output element 13 is intended for a rotationally fixed connection to the camshaft to be adjusted.
  • the adjusting element 9 is designed as an inner ring of a rolling bearing 8, which is part of a wave generator 7.
  • the wave generator 7 is driven via a compensating clutch, namely an Oldham clutch, by an electric motor (not shown), for example a brushless synchronous motor.
  • the compensating clutch has an Oldham disk, not shown, into which two bolts 14 engage when the camshaft adjuster is fully assembled.
  • the bolts 14 are fastened in the roller bearing inner ring mentioned and are assigned to the adjusting element 9.
  • the adjusting element 9 provides one non-circular, elliptical raceway for rolling elements 10, namely balls, is formed.
  • An associated outer ring 11, in which the balls 10 roll, is designed to be flexible in contrast to the adjusting element 9, so that it permanently adapts to the non-round shape of the adjusting element 9.
  • the outer ring 11 in turn is surrounded by a flexible gear element 12, which has external teeth and is also called a flex ring.
  • the external toothing of the flex ring 12 engages in the internal toothing of the chain wheel 3 and the output element 13 at two diametrically opposite points.
  • the chain wheel 3 is firmly connected by screws 6 to a housing element 4, which is also part of the drive element 2.
  • the drive element 2 includes a housing cover 5, which is located on the end face of the wave gear 1 facing the camshaft to be adjusted.
  • the output element 13 is secured in the axial direction within the wave gear 1 by the housing cover 5.
  • the housing element 4 serves to secure the outer ring 11 and thus the entire wave generator 7 in the opposite axial direction within the wave gear 1.
  • the drive element 2 and the output element 13 ensure in a manner known per se that a full revolution of the adjusting element 9 relative to the drive element 2 results in a comparatively small pivoting between the drive element 2 and the output element 13 is implemented.
  • a coupling stage can be formed either between the flex ring 12 and the drive element 2 or between the flex ring 12 and the output element 13.
  • the transmission stage of the wave gear is accordingly formed either by the flex ring 12 and the output element 13 or between the flex ring 12 and the drive element 2.
  • the wave gear 1 is a plus gear
  • an anti-twist device 15 is provided, which is formed on the one hand by two elements 2, 9, namely the drive element 2 and the adjusting element 9, which are to be assigned to the connecting elements of the wave gear 1, and on the other hand by a securing element 18 in the form of a locking ring.
  • the locking ring 18 interacts positively with the drive element 2 on the outside and positively with the adjusting element 9 on the inside.
  • the U-profile 19 forms an inner, corrugated section 20, which can be attributed to a positive anti-rotation device that can be produced between the adjusting element 9 and the locking ring 18.
  • the form-fitting anti-rotation protection is constructed from an inner anti-rotation contour 16 on the side of the adjusting element 9 and an outer anti-rotation contour 17 on the side of the locking ring 18.
  • the inner anti-rotation contour 16 is secured by parts that are already present in the wave gear 1, namely by the bolts 14, provided.
  • the associated outer anti-rotation contour 17 is in the form of the annularly closed, corrugated section 20 of the locking ring 18.
  • the corrugated section 20 is concentrically surrounded by an outer, smooth section 21, which is also formed by the U-profile 19 of the locking ring 18.
  • the outer, annular section 21 contacts a cylindrical inner circumferential surface of the housing element 4.
  • the smooth section 21 is part of a force-locking anti-rotation device between the locking ring 18 and the drive element 2.
  • a radially outwardly directed flange 22 of the locking ring 18 adjoins the outer, cylindrical section 21.
  • This flange 22 is in the arrangement according to Figures 1 and 2 on the front side of the housing element 4.
  • a tab 23 extending from the flange 22 can also be seen, which allows the device to be easily removed manually Circlip 18 from wave gear 1 is used. Attaching the electric motor of the camshaft adjuster to the wave gear 1 is only possible with the locking ring 18 removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Retarders (AREA)
EP19836787.2A 2019-01-16 2019-12-17 Wellgetriebe Active EP3911845B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019101107.8A DE102019101107B4 (de) 2019-01-16 2019-01-16 Wellgetriebe
PCT/DE2019/101099 WO2020147882A1 (de) 2019-01-16 2019-12-17 Wellgetriebe

Publications (3)

Publication Number Publication Date
EP3911845A1 EP3911845A1 (de) 2021-11-24
EP3911845C0 EP3911845C0 (de) 2024-02-21
EP3911845B1 true EP3911845B1 (de) 2024-02-21

Family

ID=69167554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19836787.2A Active EP3911845B1 (de) 2019-01-16 2019-12-17 Wellgetriebe

Country Status (6)

Country Link
US (1) US11686225B2 (ja)
EP (1) EP3911845B1 (ja)
JP (1) JP7268166B2 (ja)
CN (2) CN113302380A (ja)
DE (1) DE102019101107B4 (ja)
WO (1) WO2020147882A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021105281A1 (de) 2021-03-04 2022-09-08 Schaeffler Technologies AG & Co. KG Elektromechanischer Nockenwellenversteller und Verfahren zum Betrieb eines Nockenwellenverstellers

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4930427B2 (ja) * 2008-03-27 2012-05-16 株式会社デンソー バルブタイミング調整装置の製造方法
DE102008022932B4 (de) 2008-05-09 2021-08-05 Schaeffler Technologies AG & Co. KG Montageanordnung eines Phasenstellers und Phasensteller
DE102008022931A1 (de) 2008-05-09 2009-11-12 Schaeffler Kg Anordnung zur Montage eines Phasenstellers
DE102009019397B4 (de) 2008-07-07 2017-11-23 Schaeffler Technologies AG & Co. KG Phasenversteller für Verbrennungsmotoren mit einem Verriegelungselement
US8424500B2 (en) 2009-08-06 2013-04-23 Delphi Technologies, Inc. Harmonic drive camshaft phaser with improved radial stability
US8584633B2 (en) 2009-08-06 2013-11-19 Delphi Technologies, Inc. Harmonic drive camshaft phaser with bias spring
DE102013204659A1 (de) 2013-03-18 2014-09-18 Schaeffler Technologies Gmbh & Co. Kg Nockenwellenversteller
WO2015187469A1 (en) * 2014-06-05 2015-12-10 Borgwarner Inc. Electric cam phaser with fixed sun planetary
JP6350365B2 (ja) * 2015-04-07 2018-07-04 株式会社デンソー バルブタイミング調整装置、バルブタイミング調整装置の製造に用いられるロック治具、および、バルブタイミング調整装置の製造方法
DE102016204426A1 (de) * 2016-03-17 2017-09-21 Schaeffler Technologies AG & Co. KG Elektrischer Wellenversteller
DE102016207927B4 (de) * 2016-05-09 2018-07-26 Schaeffler Technologies AG & Co. KG Stellantrieb
DE102016207930B3 (de) 2016-05-09 2017-08-10 Schaeffler Technologies AG & Co. KG Wellgetriebe
CN109196192A (zh) * 2016-05-31 2019-01-11 舍弗勒技术股份两合公司 调节传动机构
DE102016216594B3 (de) 2016-09-02 2017-11-02 Schaeffler Technologies AG & Co. KG Nockenwellenversteller
DE102016223474B3 (de) * 2016-11-25 2018-03-08 Schaeffler Technologies AG & Co. KG Verstellgetriebevorrichtung für eine Welle sowie Fahrzeug mit der Verstellgetriebevorrichtung
DE102017111035B3 (de) * 2017-05-22 2018-06-21 Schaeffler Technologies AG & Co. KG Nockenwellenversteller
CN107588177B (zh) * 2017-09-28 2024-06-18 深圳市领略数控设备有限公司 一种摆线针轮谐波传动装置

Also Published As

Publication number Publication date
EP3911845C0 (de) 2024-02-21
JP7268166B2 (ja) 2023-05-02
CN113302380A (zh) 2021-08-24
EP3911845A1 (de) 2021-11-24
US20220243620A1 (en) 2022-08-04
JP2022518453A (ja) 2022-03-15
CN116641772A (zh) 2023-08-25
US11686225B2 (en) 2023-06-27
WO2020147882A1 (de) 2020-07-23
DE102019101107A1 (de) 2020-07-16
DE102019101107B4 (de) 2024-05-16

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