EP2676011A2 - 3-wellen-verstellgetriebe mit zwei mechanischen anschlägen - Google Patents
3-wellen-verstellgetriebe mit zwei mechanischen anschlägenInfo
- Publication number
- EP2676011A2 EP2676011A2 EP11791281.6A EP11791281A EP2676011A2 EP 2676011 A2 EP2676011 A2 EP 2676011A2 EP 11791281 A EP11791281 A EP 11791281A EP 2676011 A2 EP2676011 A2 EP 2676011A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- stop
- shaft
- gear
- drive
- mechanism according
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- 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
Definitions
- the invention relates to a 3-shaft adjusting according to the preamble of claim 1 with a rotatably connected to a drive shaft driving part, a rotatably connected to an output shaft driven part and a rotatably connected to an adjusting actuator.
- 3-shaft adjusting gears are used, for example, in internal combustion engines for adjusting phase angles, primarily for adjusting the opening and closing times of the gas exchange valves (camshaft adjuster, phaser for actuator shafts in variable valve trains).
- the phaser is arranged as an actuator in a 3-shaft system.
- Primary power is supplied to the 3-shaft system through the drive shaft (sprocket), which is output through the output shaft (e.g., camshaft).
- the actuator is arranged as a link between the drive shaft and the shaft to be driven in the power flow. It allows a third shaft (adjusting shaft) superimposed on the drive power additionally coupled mechanical power into the shaft system or remove it.
- the predetermined by the drive shaft movement function phase angle
- 3-shaft adjusting gear examples include swash plate gear and mecanical gear, which are described for example in WO 2006/018080. These also include the wave gears known from WO 2005/080757 and the gears contained in US 2007/0051332 A1 and US 2003/0226534 A1.
- phasers are known in the art.
- DE 10 2004 009 128 A1 DE 10 2005 059884 A1 and DE 10 2004 038 681 A1 describes electromechanical camshaft adjusters.
- an electromechanical camshaft adjuster is known in which the Versteilmotor is connected by means of a releasable coupling with the adjusting gear. By an appropriate design of the coupling transmittable to the adjusting torque can be limited. This then acts as a safety clutch.
- a special case of a 3-shaft variable speed is a 2-shaft arrangement in Versteilantrieben where the drive shaft is fixed to the housing, d. H. only power is transferred between the adjusting shaft and the output shaft.
- Such a device serves to convert a drive power inputted at a high speed and a low load into a low-speed and high-load output, and finds application in, for example, automotive type reduction drives and industrial applications, e.g. robotics.
- the adjustment range or drive range is limited by limiting the angle of rotation of one of the three shafts relative to a second shaft or relative to the housing.
- a mechanical stop is used as an integral part of the device.
- the stop between the output shaft and the drive shaft is provided, since the adjusting shaft usually covers an angle of more than 360 °.
- the adjustment shaft which is not limited directly in the adjustment angle or drive angle, is then braked in the case of the stop via the transmission kinematics and the rigidity of the transmission elements as soon as the output side reaches the limit of the rotation angle.
- gear parts can deform so much that they collide with each other and bring the actuator to jamming.
- Farther Gear parts can tire prematurely or must be oversized for normal operation in order to endure the high loads in the case of unbraked stop.
- the object of Einfindung is to form a 3-shaft adjustment such that the pulse loads occurring when reaching a stop in the actuator are damped in their effect.
- a 3-shaft adjusting initially comprises in a known manner with a drive shaft rotatably connectable drive part, a rotatably connected to an output shaft driven part and a rotatably connected to an adjusting shaft of an actuator actuator.
- a first mechanical stop for limiting an adjustment angle between the drive shaft and the output shaft is provided.
- a second mechanical stop is now arranged between two other shafts as the first stop. That is, when the first stop is provided between the driving part and the driven part, the second stop may be provided between the actuator and the driving part or the driven part.
- each of the three shafts is thus coupled to at least one of the two stops, and precisely one shaft is coupled to both stops.
- the advantages of the invention are to be seen in particular in that a simple effective protective measure damaging or even prevents the jamming of the actuator under excessive load. As a result, the life and reliability of the variable transmission can be significantly increased with minimal cost.
- the second mechanical stop may be formed in the simplest case by two stop surfaces, which are placed on the various gear parts (execution corresponding to the first stop). But the two abutment surfaces can also be formed by a run in a gate stop pin
- the second stop may be formed in alternative embodiments, for example by a ball, a pin or a similar shaped body, which is guided in a spiral-shaped recess.
- the spiral-shaped recess may have a pitch in the axial or radial direction.
- the adjustment angle can be limited in only one adjustment direction or in both adjustment directions.
- the limitation is achieved by mounting the loop belt up to the respective block angle by contact between the windings or with the housing, so that the function of the second stop for limiting the adjustment of the adjusting shaft is represented by the principle of the wrap.
- the torque of the wrap spring acting on the adjusting shaft is much smaller than the moment of the actuator. In the fail-safe case, the moment effective at the adjustment acts in the preferably approaching adjustment direction.
- the invention is explained below on an electromechanical camshaft adjuster of an internal combustion engine, in which the first mechanical stop is provided between the drive part and the driven part.
- the inventive second mechanical stop is advantageously provided in this case between the actuator and drive part, but may also be formed between the actuator and output member. The following will only on the variant of the stop between actuator and drive part received.
- the second mechanical see stop comprises a reduction gear.
- the width of the secondary adjustment window then depends on the reduction and the adjustment on the output side.
- the reduction gear is in a preferred embodiment, a planetary gear, which comprises a formed with the actuator sun gear, at least one planetary gear and a ring gear.
- a stop is firmly connected to the sprocket, while a stop gate is provided either on a planet carrier or on the ring gear.
- the ring gear may be formed in a first embodiment with the sprocket.
- the stop scenery is provided here on the planet carrier.
- the ring gear may be rotatably connected to the drive member.
- the planet carrier is then sprocket-proof.
- the ring gear as such may be arranged separately on the drive member or be formed only in a sector of a ring gear.
- the stop bead is then provided, in which a stop pin fixedly connected to the drive part is guided.
- the ring gear disc can therefore only be rotated by an angle given by the angular range of the guide angle with respect to the drive part.
- FIG. 1 shows a camshaft adjuster with a second mechanical stop according to the invention with a reduction gear in a longitudinal sectional view
- FIG. 2 shows the camshaft adjuster according to FIG. 1 in a side view, seen from an adjusting shaft;
- FIG. 3 shows the camshaft adjuster according to FIG. 1 in a side view, viewed from a camshaft;
- FIG. 4 shows a second embodiment of a second stop in a camshaft adjuster in two different positions;
- Fig. 5 An embodiment of the application of the principle of the wrap.
- the camshaft adjuster comprises a sprocket 01 as a drive part and a camshaft gear 02 as a driven part.
- the adjusting gear is designed as a wave gear.
- a hollow shaft 03 as an actuator is formed with a wave generator 04, which comprises an elliptical inner ring 06, an elliptical outer ring 07 with an outer toothing 08 and roller bodies 09 arranged therebetween.
- the sprocket 01 comprises a first ring gear with an internal toothing 1 1.
- the ring gear is incorporated directly into the sprocket 01.
- the camshaft gear 02 has an internal toothing 12.
- the number of teeth of the internal gears 1 1, 12 differ by one or two teeth.
- the hollow shaft 03 is preferably connected via a coupling with the adjusting shaft of the electric motor.
- the rotor of the electric motor runs with camshaft speed with. By increasing or reducing the rotor speed, it takes place camshaft adjustment to early or late in a conventional manner.
- a stop ring 13 On the sprocket 01 camshaft side in a known manner, a stop ring 13 is provided with a radially inwardly projecting stop lug 14. On Nockenwellenrad 02 a stop plate 16 with stops 17 in the same plane as the stop ring 13 is arranged. A relative rotation between the camshaft and crankshaft is limited by the abutting stop lug 14 with one of the stop surfaces 17 (see also Fig. 3).
- the internal teeth 1 1 of the sprocket 01 is extended on the Verstellwellenseite (in the picture left) in the axial direction and engages in one or more planet gears 18 (see also Fig. 2).
- the planet gears 18 roll on an outer toothing 19 of the hollow shaft 03 and are connected to each other by means of a web shaft 21 (planet carrier).
- the web shaft 21 has on its outer periphery a link 22 with stop surfaces 23 (FIG. 2).
- a stop pin 24 is firmly anchored, which is movable relative to the web shaft 21 within the link 22 between the abutment surfaces 23.
- the width of the secondary adjustment window of the second stop depends on the reduction and the adjustment on the output side.
- Fig. 4 shows an alternative embodiment of a second stop with a reduction gear in a 3-shaft adjusting in a side view from the perspective of the adjusting or hollow shaft 03 in two different positions.
- a ring gear 26 is arranged relative to the sprocket 01 rotatably in the adjusting gear.
- the ring gear 26 has a stop gate 27, in which the sprocket-fixed stop pin 24 is guided.
- the ring gear 26 has a Geretekulisse 28 with an internal toothing 29.
- the components of the second stop are preferably made of plastic by injection molding because of the low load and in favor of low inertia.
- the second stop (secondary stop) is realized between adjusting and drive unit by applying the principle of the wrap.
- the left figure shows the secondary stop on the example of the output unit in the early stop.
- a wrap spring 32 is disposed in a housing 33 which is mounted on the sprocket 01.
- the wrap spring acts in the illustrated embodiment between the sprocket 01 and the hollow shaft 03.
- An inner end 34 is connected to the hollow shaft 03, an outer end 36 of the wrap spring 32 is fixedly connected to the sprocket 03.
- the limitation of the adjustment in the direction of the early stop (arrow 37) is effected by contact with the housing 33. In this position, a turn spacing remains between the turns of the wrap spring 32.
- the drive unit is in the late stop.
- the hollow shaft 03 was rotated after reaching the stop about 400 ° in the clockwise direction (arrow 38). This corresponds to a translation i AB of 1:20 at a Verstellwinkel Scheme between sprocket 01 and camshaft 02 of about 20 °.
- the wrap spring 24 is "wound up" in this position, ie there is a winding spacing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Retarders (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011004070A DE102011004070A1 (de) | 2011-02-14 | 2011-02-14 | 3-Wellen-Verstellgetriebe mit zwei mechanischen Anschlägen |
PCT/EP2011/071582 WO2012110128A2 (de) | 2011-02-14 | 2011-12-02 | 3-wellen-verstellgetriebe mit zwei mechanischen anschlägen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2676011A2 true EP2676011A2 (de) | 2013-12-25 |
EP2676011B1 EP2676011B1 (de) | 2014-10-22 |
Family
ID=45094615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11791281.6A Not-in-force EP2676011B1 (de) | 2011-02-14 | 2011-12-02 | 3-wellen-verstellgetriebe mit zwei mechanischen anschlägen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2676011B1 (de) |
DE (1) | DE102011004070A1 (de) |
WO (1) | WO2012110128A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10352419B2 (en) | 2016-06-30 | 2019-07-16 | Borgwarner Inc. | Carrier stop for split ring planetary drive |
WO2020094174A1 (de) | 2018-11-09 | 2020-05-14 | Schaeffler Technologies AG & Co. KG | Wellgetriebe für einen elektromechanischen nockenwellenversteller |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014207631B4 (de) | 2014-04-23 | 2019-10-17 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller mit zusätzlichem Formschluss zwischen drehmomentübertragenden Teilen |
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 |
DE102017111223B3 (de) | 2017-05-23 | 2018-09-13 | Schaeffler Technologies AG & Co. KG | Nockenwellenversteller |
JP2019027435A (ja) | 2017-07-31 | 2019-02-21 | ボーグワーナー インコーポレーテッド | e−位相器クッション止め部 |
DE102017119460B3 (de) * | 2017-08-25 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Wellgetriebe |
DE102017128880B4 (de) * | 2017-12-05 | 2021-03-25 | Schaeffler Technologies AG & Co. KG | Elektrischer Nockenwellenversteller zur variablen Ventilsteuerung in einer Brennkraftmaschine |
EP3578769A1 (de) | 2018-06-01 | 2019-12-11 | Ovalo GmbH | Verstellvorrichtung, insbesondere nockenwellenversteller |
DE102021114625B4 (de) * | 2021-06-08 | 2023-07-06 | Schaeffler Technologies AG & Co. KG | Stellgetriebe und Verfahren zur Montage eines Stellgetriebes eines elektromechanischen Nockenwellenverstellers |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3986371B2 (ja) | 2002-06-07 | 2007-10-03 | 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 |
DE10248351A1 (de) | 2002-10-17 | 2004-04-29 | Ina-Schaeffler Kg | Elektrisch angetriebener Nockenwellenversteller |
DE102004009128A1 (de) | 2004-02-25 | 2005-09-15 | Ina-Schaeffler Kg | Elektrischer Nockenwellenversteller |
DE102004038681B4 (de) | 2004-08-10 | 2017-06-01 | Schaeffler Technologies AG & Co. KG | Elektromotorischer Nockenwellenversteller |
JP4390078B2 (ja) | 2005-09-05 | 2009-12-24 | 株式会社デンソー | バルブタイミング調整装置 |
DE102005059884A1 (de) | 2005-12-15 | 2007-07-05 | Schaeffler Kg | Nockenwellenversteller |
EP2006501A1 (de) * | 2007-06-22 | 2008-12-24 | Delphi Technologies, Inc. | Variable Nockenverstellvorrichtung |
DE102008019586A1 (de) * | 2008-04-18 | 2009-10-22 | Schaeffler Kg | Nockenwellenverstellvorrichtung |
DE102008039007A1 (de) * | 2008-08-21 | 2010-02-25 | Schaeffler Kg | Verfahren zur Verstellung einer Kurbelwelle eines Verbrennungsmotors, Nockenwellenverstellsystem und Verbrennungsmotor mit verstellbarer Kurbelwelle |
DE102009009523A1 (de) * | 2009-02-18 | 2010-08-19 | Schaeffler Technologies Gmbh & Co. Kg | Phasenstellanordnung einer Brennkraftmaschine |
-
2011
- 2011-02-14 DE DE102011004070A patent/DE102011004070A1/de not_active Ceased
- 2011-12-02 EP EP11791281.6A patent/EP2676011B1/de not_active Not-in-force
- 2011-12-02 WO PCT/EP2011/071582 patent/WO2012110128A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012110128A2 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10352419B2 (en) | 2016-06-30 | 2019-07-16 | Borgwarner Inc. | Carrier stop for split ring planetary drive |
WO2020094174A1 (de) | 2018-11-09 | 2020-05-14 | Schaeffler Technologies AG & Co. KG | Wellgetriebe für einen elektromechanischen nockenwellenversteller |
Also Published As
Publication number | Publication date |
---|---|
EP2676011B1 (de) | 2014-10-22 |
WO2012110128A3 (de) | 2012-10-11 |
DE102011004070A1 (de) | 2012-08-16 |
WO2012110128A2 (de) | 2012-08-23 |
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