EP2438275B1 - Embrayage ou frein dans ou sur une transmission - Google Patents

Embrayage ou frein dans ou sur une transmission Download PDF

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Publication number
EP2438275B1
EP2438275B1 EP20100708763 EP10708763A EP2438275B1 EP 2438275 B1 EP2438275 B1 EP 2438275B1 EP 20100708763 EP20100708763 EP 20100708763 EP 10708763 A EP10708763 A EP 10708763A EP 2438275 B1 EP2438275 B1 EP 2438275B1
Authority
EP
European Patent Office
Prior art keywords
armature
switching coil
transmission
shaft
clutch
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.)
Not-in-force
Application number
EP20100708763
Other languages
German (de)
English (en)
Other versions
EP2438275A1 (fr
Inventor
Frank Richter
Konrad Thoma
Ilja Imgrunt
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP2438275A1 publication Critical patent/EP2438275A1/fr
Application granted granted Critical
Publication of EP2438275B1 publication Critical patent/EP2438275B1/fr
Not-in-force 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
    • F01L1/34—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

Definitions

  • the invention relates to a clutch or brake with an electrically actuated shift coil and an axially movable against the shift coil, a frictional engagement or positive engagement with the shift coil causing, relative to the shift coil rotatable armature, according to the preamble of patent claim 1.
  • Such clutches or brakes are used for example in adjusting systems for camshafts of an internal combustion engine, the superposition gear with a drive shaft driven by a crankshaft of the internal combustion engine, with a camshaft of the internal combustion engine driven output element and with an actuator, by applying a braking torque relative rotation between can cause the drive element and the output element, have.
  • Electromagnetically actuated clutches or brakes are also used as switching elements in automatic transmissions to couple there rotating gear parts together or decelerate against a transmission housing.
  • an adjusting device for a camshaft which has a brake system and an output side connected to the output side of the camshaft and the crankshaft drive side, wherein the superposition gear for adjusting the camshaft dissipates a part of the drive-side energy in the brake system.
  • the frictional braking system generates the required braking force via a friction lining located in the permanent slip by a switching coil acts on an armature on which the friction lining is mounted, via an electrical control and depending on the required phase position causes a corresponding braking torque.
  • This adjusting device has an additional mechanical lock, which comes into effect when the switching coil is not energized by the armature is displaced axially by means of a spring and an adjusting shaft is positively connected to the drive element of the superposition gearing.
  • the switching coil is fixed to the housing and requires an adjustment relative to the on the adjusting shaft rotatably and axially displaceably arranged anchor with the friction lining.
  • a similar adjusting device for a camshaft is in the DE 102 20 687 A1 described, which also has a superposition gear with a driven by a crankshaft of the engine drive element, a camshaft of the internal combustion engine driving output element and an actuator, by means of an acting on the actuator electromotive actuator relative rotation between the drive element and the output element can cause.
  • an electromagnetic brake between the actuator and a fixed housing part is still provided by means of which can reach and hold a base or emergency position of the camshaft.
  • This adjustment device for a camshaft is shown only schematically, and it can not be seen how the electromotive actuator and the electromagnetic brake relative to the housing part and the superposition gear are stored.
  • the invention has for its object to provide a clutch or brake in a gear consisting of an electrically actuated shift coil and a movable against the shift coil, a frictional engagement or positive engagement with the switching coil causing relatively rotatable armature to the anchor, the axial manufacturing tolerances in a simple manner and thermal expansion between the building parts allowed.
  • the invention is based on a clutch or brake with an electrically actuated shift coil and an axially movable against the shift coil, a frictional engagement or positive engagement with the shift coil causing, relative to the shift coil rotatable armature, in a transmission, for example in an adjustment system for camshafts of an internal combustion engine comprising a superposition gearbox with a drive element driven by a crankshaft of the internal combustion engine, an output element driving a camshaft of the internal combustion engine and an adjusting element, by means of which a relative rotation between the drive element and the output element can be effected by applying a braking torque
  • the armature rotatably and slidably centered on or arranged on a transmission part, and that the switching coil rotatably and centered coaxial with the anchor by means of a diaphragm spring to another transmission part, relative to the braked or with the anchor the anchor is coupled, is attached.
  • the transmission part on which the armature is arranged be a transmission shaft on which the switching coil is rotatably and immovably mounted.
  • the transmission shaft is centered and supported relative to the transmission part to which the shift coil is fixed by means of the diaphragm spring, while the axial manufacturing tolerances between the transmission part and the transmission shaft as well as the thermal expansion are absorbed by the diaphragm spring.
  • the gear part to which the shift coil is attached may be a non-rotatable housing part, in particular, the shift coil may be fixed to a rotationally fixed housing element of the superposition gearbox for a camshaft adjusting an internal combustion engine, while the armature is arranged on an adjusting shaft designed as an adjusting element of the superposition gear.
  • the superposition gear is designed as a three-shaft gearbox arranged in a motor housing part with a drive shaft connected to the crankshaft, an output shaft connected to the camshaft and an adjusting shaft, wherein the switching coil is fixed by means of the diaphragm spring on the motor housing part and mounted on the adjusting shaft by means of at least one rolling bearing and the armature is arranged rotationally fixed and axially displaceable on the adjusting shaft.
  • the adjusting system for camshafts of an internal combustion engine comprises a superimposition gearbox 1, the drive element 4 of which is driven by a crankshaft of the internal combustion engine communicating with the crankshaft via a drive wheel 7. Furthermore, the superposition gearing 1 comprises an output element 3 driving a camshaft of the internal combustion engine and an adjusting element 6, the latter being connected to an electromotive actuator consisting of a rotor 8 and a stator 9.
  • the stator 9 is rotationally fixed in a motor housing part 10 and fixed axially immovable.
  • an electromagnetic brake 11 is arranged, which serves, for example, in a failure of the electric motor actuator 8, 9 by braking or setting the adjusting 6, a base or emergency position of the driven element connected to a camshaft. 3 to reach and hold.
  • the electromagnetic brake 11 has a switching coil 12 which is connected by means of a diaphragm spring 22 to the motor housing part 10, wherein the diaphragm spring 22 is screwed both to the switching coil 12 and to the motor housing 10 by means of fastening screws 23.
  • the shift coil 12 also serves to support the free end of the adjusting shaft 6 by means of two deep groove ball bearings 15a, 15b.
  • the inner rings of these deep groove ball bearings 15a, 15b are on a stub shaft of the adjusting shaft 6 by means of an expansion screw or nut 17 against a shoulder 16 on the adjusting shaft 6 axially braced with the interposition of a spacer ring 18.
  • the outer ring of the shoulder closer groove ball bearing 15b is axially fixed to a collar 19 of the switching coil 12 and axially fixed by means of a snap ring 20, while the other deep groove ball bearing 15a is designed as a floating bearing with loose outer ring.
  • the adjusting shaft 6 and the superposition gear 1 are compensated.
  • a thermal expansion of the elements of the superposition gear 1 relative to the motor housing part 10 is received by the diaphragm spring 22, without this having any effect on the mounting of the adjusting shaft 6 in the switching coil 12. Accordingly, there is a relief of the superposition gear 1 of lateral forces and vibrations, since the adjusting shaft 6 via the deep groove ball bearings 15a and 15b, the switching coil 12 and the diaphragm spring 22 in all operating states safely centered relative to the motor housing part 10 remains.
  • an armature 13 is also arranged axially displaceable and rotationally fixed.
  • a friction lining 14 on an end face of the armature 13 cooperates with a corresponding frontal friction surface 24 of the switching coil 12.
  • a compression spring 21 serves to move the armature 13 when the switching coil 12 is not energized in a release position, in which no contact between the switching coil 12 and the friction lining 14 of the armature 13 is given.
  • the double arrow marked on the anchor 13 indicates its possible directions of movement.
  • the illustrated and described embodiment relates to an electromagnetic, frictionally acting brake 11 in a superposition gear 1 of an adjustment system for camshafts of an internal combustion engine, which may also be formed positively acting.
  • the invention can also be used for the realization of a clutch or brake in an automatic transmission and can serve rotating transmission elements to set against a gear housing part or to couple rotating gear elements together.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Braking Arrangements (AREA)

Claims (6)

  1. Embrayage ou frein (11) comprenant une bobine de commutation (12) pouvant être actionnée électriquement et une armature (13) déplaçable axialement contre la bobine de commutation (12), provoquant un engagement par friction ou un engagement par complémentarité de formes avec la bobine de commutation (12) et rotative par rapport à la bobine de commutation (12), dans une transmission (1), comportant une transmission à superposition (1) comprenant un élément d'entraînement (4) entraîné par un vilebrequin d'un moteur à combustion interne, un élément de sortie (3) entraînant un arbre à cames du moteur à combustion interne et un élément de réglage au moyen duquel une rotation relative entre l'élément d'entraînement (4) et l'élément de sortie (3) peut être provoquée par application d'un moment de freinage, et l'armature (13) étant disposée de manière solidaire en rotation et coulissante de façon centrée sur ou contre une partie de transmission (6), et la bobine de commutation (12) étant fixée de manière solidaire en rotation ainsi que de manière centrée coaxialement par rapport à l'armature (13) sur une partie de transmission supplémentaire (10), par rapport à laquelle l'armature (13) est freinée ou à laquelle l'armature (13) est accouplée, caractérisé en ce que la bobine de commutation est fixée à la partie de transmission supplémentaire au moyen d'un ressort à diaphragme.
  2. Embrayage ou frein selon la revendication 1, caractérisé en ce que la partie de transmission (6) sur laquelle l'armature (13) est disposée est un arbre de transmission, et en ce que la bobine de commutation (12) est montée de manière rotative et non coulissante sur l'arbre de transmission.
  3. Embrayage ou frein selon la revendication 1 ou 2, caractérisé en ce que la partie de transmission supplémentaire (10) à laquelle la bobine de commutation (12) est fixée est une partie de boîtier solidaire en rotation.
  4. Embrayage ou frein selon la revendication 3, caractérisé en ce que la bobine de commutation (12) est fixée à un élément de boîtier solidaire en rotation de la transmission à superposition (1) pour un système de réglage d'arbre à cames d'un moteur à combustion interne, et en ce que l'armature (13) est disposée sur un élément de réglage (6), réalisé sous forme d'arbre de réglage, de la transmission à superposition (1).
  5. Embrayage ou frein selon la revendication 4, caractérisé en ce que la transmission à superposition (1) est réalisée sous la forme d'une transmission à trois arbres disposée dans une partie de boîtier de moteur (10) et comprenant un arbre d'entraînement (4) relié au vilebrequin, un arbre de sortie (3) relié à l'arbre à cames et un arbre de réglage (6), la bobine de commutation (12) étant fixée à la partie de boîtier de moteur (10) au moyen du ressort à diaphragme (22) et étant montée sur l'arbre de réglage (6) au moyen d'au moins un palier à roulement (15a, 15b), et l'armature (13) étant disposée de manière solidaire en rotation et axialement coulissante sur l'arbre de réglage (6).
  6. Embrayage ou frein selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'un ressort de compression (21) agissant dans le sens d'ouverture est disposé entre l'armature (13) et la bobine de commutation (12).
EP20100708763 2009-06-02 2010-03-12 Embrayage ou frein dans ou sur une transmission Not-in-force EP2438275B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009026626A DE102009026626A1 (de) 2009-06-02 2009-06-02 Kupplung oder Bremse in oder an einem Getriebe
PCT/EP2010/053159 WO2010139491A1 (fr) 2009-06-02 2010-03-12 Embrayage ou frein dans ou sur une transmission

Publications (2)

Publication Number Publication Date
EP2438275A1 EP2438275A1 (fr) 2012-04-11
EP2438275B1 true EP2438275B1 (fr) 2015-04-22

Family

ID=42154493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100708763 Not-in-force EP2438275B1 (fr) 2009-06-02 2010-03-12 Embrayage ou frein dans ou sur une transmission

Country Status (7)

Country Link
US (1) US8434439B2 (fr)
EP (1) EP2438275B1 (fr)
JP (1) JP2012528975A (fr)
KR (1) KR20120016122A (fr)
CN (1) CN102449274B (fr)
DE (1) DE102009026626A1 (fr)
WO (1) WO2010139491A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9664073B2 (en) * 2014-02-25 2017-05-30 Delphi Technologies, Inc. Modular electrically actuated camshaft phaser
DE102017207905A1 (de) * 2017-05-10 2018-11-15 Robert Bosch Gmbh Nockenwellenphasensteller sowie Nockenwelle und Verbrennungsmotor umfassend einen derartigen Nockenwellenphasensteller
US11378145B2 (en) 2017-10-25 2022-07-05 Warner Electric Europe S.A.S. Stepped torque braking device
WO2019134732A1 (fr) * 2018-01-02 2019-07-11 HELLA GmbH & Co. KGaA Dispositif d'actionnement pour un appareil de synchronisation d'arbre à cames
JP7185536B2 (ja) * 2019-01-09 2022-12-07 株式会社Subaru 回転翼駆動装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3904641B2 (ja) * 1996-11-22 2007-04-11 日鍛バルブ株式会社 可変バルブタイミング装置
JP3911982B2 (ja) * 2000-09-25 2007-05-09 日産自動車株式会社 内燃機関の可変バルブタイミング装置
JP3798944B2 (ja) * 2001-01-31 2006-07-19 株式会社日立製作所 内燃機関のバルブタイミング制御装置
JP2003049615A (ja) 2001-08-06 2003-02-21 Hitachi Unisia Automotive Ltd 回転制動機及び内燃機関のバルブタイミング制御装置
US6672264B2 (en) * 2001-10-12 2004-01-06 Hitachi Unisia Automotive, Ltd. Valve timing control device of internal combustion engine
US6622677B2 (en) 2002-02-22 2003-09-23 Borgwarner Inc. Worm gear driven variable cam phaser
DE10220687A1 (de) 2002-05-10 2003-11-20 Ina Schaeffler Kg Nockenwellenversteller mit elektrischem Antrieb
US6799544B1 (en) * 2003-05-29 2004-10-05 Delphi Technologies, Inc. Method and apparatus for actuating a cam phaser
DE102004045631A1 (de) 2004-09-21 2006-04-06 Daimlerchrysler Ag Verstellantrieb für eine Nockenwellenverstelleinrichtung sowie Rotor für einen Verstellantrieb
DE102006011806A1 (de) 2006-03-15 2007-10-04 Zf Friedrichshafen Ag Verstellvorrichtung für eine Nockenwelle

Also Published As

Publication number Publication date
CN102449274A (zh) 2012-05-09
EP2438275A1 (fr) 2012-04-11
KR20120016122A (ko) 2012-02-22
CN102449274B (zh) 2014-08-06
JP2012528975A (ja) 2012-11-15
US20120067315A1 (en) 2012-03-22
DE102009026626A1 (de) 2010-12-09
US8434439B2 (en) 2013-05-07
WO2010139491A1 (fr) 2010-12-09

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