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WO2008037569A1 - Unité d'entraînement électrique avec dispositif pour maintenir en position un arbre - Google Patents

Unité d'entraînement électrique avec dispositif pour maintenir en position un arbre Download PDF

Info

Publication number
WO2008037569A1
WO2008037569A1 PCT/EP2007/059233 EP2007059233W WO2008037569A1 WO 2008037569 A1 WO2008037569 A1 WO 2008037569A1 EP 2007059233 W EP2007059233 W EP 2007059233W WO 2008037569 A1 WO2008037569 A1 WO 2008037569A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive unit
shaft
unit according
holding device
clamping
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.)
Ceased
Application number
PCT/EP2007/059233
Other languages
German (de)
English (en)
Inventor
Ulrich Grau
Harald Hochmuth
Robby Lipfert
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 Industrial Drives AG and Co KG
IHO Holding GmbH and Co KG
Original Assignee
INA Drives and Mechatronics GmbH and Co KG
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 INA Drives and Mechatronics GmbH and Co KG, Schaeffler KG filed Critical INA Drives and Mechatronics GmbH and Co KG
Publication of WO2008037569A1 publication Critical patent/WO2008037569A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
    • F16D41/084—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action the intermediate coupling members wedging by pivoting or rocking
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/36—Helical cams, Ball-rotating ramps

Definitions

  • Electric drive unit with device for maintaining the position of a shaft
  • the invention relates to an electric drive unit with a device for maintaining the position of a rotatably mounted shaft.
  • a generic drive unit is known for example from DE 103 44 211 A1.
  • a position around a shaft namely an armature shaft of an electric motor, a arranged around the shaft wrapping body is used.
  • an actively actuable actuator for example an electrically actuated lifting magnet, is provided.
  • the shaft or the wrapping body may be coated with a material having a high coefficient of friction, in particular with a rubber-like sheathing. The sheathing is inherently subject to wear.
  • the invention has for its object to provide an electric drive unit, which comprises a device for maintaining the position of a shaft and is characterized both by compact design and by a particularly low wear. Summary of the invention
  • This object is achieved according to the invention by an electric drive unit having the features of claim 1.
  • This drive unit comprises both an electric motor with a housing, a stator, a rotor and a shaft connected to the rotor, and a position holding device acting on the shaft, i. a device with which the shaft can be selectively blocked or released.
  • a position holding device is a switchable, double-acting, i. provided in both directions of rotation, provided in the housing of the electric motor clamping roller freewheel.
  • a particularly compact construction of the entire drive unit including the position holding device can be realized.
  • the position holding device is preferably magnetically switchable, wherein a solenoid is provided for their actuation, which is an integral part of the stator of the electric motor.
  • the position holding device is preferably designed such that it is blocking in the de-energized state, i. the shaft of the electric motor is automatically held in case of failure of the power supply.
  • the position holding device may also be designed such that the rotation of the shaft is released in the de-energized state.
  • the outer clamping track of the clamping roller freewheel is formed integrally with an end wall of the housing.
  • the housing which terminates the housing on the front side and provides an external clamping track for the clamping rollers, is suitable for forming an outer raceway of a roller bearing, in particular a ball bearing, of the electric motor.
  • the pinch rollers of the positi- Onshaltevoriques here are arranged axially between the rotor of the electric motor and the bearing of the shaft of the electric motor bearings.
  • the sprag freewheel has a clamping cage leading to a number of pinch rollers, which in the released position of the position holding device, i. when the shaft is not blocked, with the shaft rotated and fixed in the locked position of the position holding device relative to the housing.
  • Double clamping ramps cooperating with the clamping rollers are preferably formed on the surface of the shaft. In the released position of the position holding device, the clamping rollers are located in the middle in a double clamping ramp, with the smallest possible distance to the axis of rotation of the electric motor.
  • the pinch rollers are acted upon by spring force, preferably in the form of a ring spring placed around the cage.
  • spring force preferably in the form of a ring spring placed around the cage.
  • the annular spring is inserted into annular grooves, which are located on the surface of the individual pinch rollers. The spring force of the annular spring is sufficient to prevent lifting of the pinch rollers from the shaft at all speeds occurring.
  • an armature plate which surrounds the shaft in an annular manner and is provided with an axially displaceable armature is preferably provided. This preferably acts positively, in particular by means of a toothing, with the clamping cage together.
  • a spring is tensioned between the armature plate and a non-rotating part of the electric motor, which is preferably designed in a space-saving manner as coaxial with the shaft arranged coil spring.
  • the armature plate is preferably axially displaceable by energizing the stator of the electric motor.
  • FIG. 1 is a perspective, partially sectioned view of an electric drive unit with a device for maintaining the position of a shaft
  • FIG. 2 shows the position holding device of the drive unit according to FIG.
  • Figure 3 shows the position holding device of Figure 2 in an exploded view.
  • An electric drive unit 1 illustrated in FIG. 1 is essentially composed of an electric motor 2 and a position-holding device 3, which is suitable for selectively blocking or releasing a shaft 5 rigidly connected to a rotor 4 of the electric motor 2.
  • the position holding device 3 is formed as a switchable, double-acting clamping roller freewheel and is located as well as the rotor 4 and a cooperating with this stator 6 in a housing 7 of the electric motor 2.
  • the housing 7 is composed of a substantially cylindrical shell part 8 and two end parts 9, 10 which are screwed on the casing part 8, for example.
  • the rotor 4 and the shaft 5 are mounted in the housing 7 by means of two rolling bearings 11, 12, namely ball bearings.
  • the individual balls 13 of the rolling bearing 12 contact on the one hand the shaft 5 and on the other hand, the front part 10, which closes the housing 7 on the side of the position holding device 3.
  • the front part 10 has an inward, ie. towards the rotor 4, pointing annular shoulder 14 integrally formed.
  • This paragraph 14 forms an outer clamping track 15 for pinch rollers 16 of the clamping roller freewheel 3.
  • the pinch rollers 16 are guided in a clamping cage 17 and surrounded by a designed as an annular spring spring 18 which rests in each case a circumferential groove 19 of the individual clamping rollers 16.
  • the annular spring 18 loads the clamping rollers 16 with a force radially inwardly, wherein each pinch roller 16 is located centrally in a double clamping ramp 20 formed on the surface of the shaft 5.
  • the spring 18 serves to keep not only the individual pinch rollers 16, but also the entire clamping cage 17 in freewheeling position.
  • at least one separate spring may be provided in a manner not shown in order to keep the clamping cage 17 in rest or freewheeling position. In any case, when the position holding device 3 is released, the clamping cage 17 rotates with the shaft 5, wherein the clamping rollers 16 do not contact the outer clamping track 15.
  • the armature plate 21 has an outer, in the arrangement of Figure 2 on the end portion 10 adjacent radial portion 22, a paragraph 14 adjacent to this parallel axial portion 23, and an inner radial portion 24 which is adjacent to the pinch rollers 16 axially.
  • a toothing 25 is formed, which is provided for positive engagement with a toothing 26 of the clamping cage 17.
  • the clamping cage 17 has relative to the anchor plate 21 a defined game in the circumferential direction.
  • the anchor plate 21 is secured against rotation by a guide (not visible in FIG. 2). If the anchor plate 21 is in the position shown in FIG.
  • the clamping cage 17 is first rotated along with it as long as the shaft 5 rotates until the toothing 26 is rotated of the clamping cage 17 abuts the toothing 25 of the anchor plate 21.
  • the pinch rollers 16 leave the center position of the double clamping ramps 20, so that the pinch rollers 16 are displaced radially outwards in the direction of the outer clamping track 15, until finally the desired clamping effect occurs and thus the shaft 5 is blocked relative to the housing 7 .
  • a direct form-fitting blocking for example by means of a blocking element engaging in a contour of a shaft, the shaft 5 is thus stopped by the clamping roller freewheel 3, although not abruptly within a small angular range. Excessive loads or damage to the position holding device 3 are thus avoided.
  • the armature plate 21 is permanently loaded by means of a helical spring 27 coaxially surrounding the shaft 5 with a force in the direction of the blocking position shown in FIG.
  • the axially displaceable armature plate 21 forms together with the stator 6 an electromagnetic actuator, wherein the stator 6 acts as a solenoid 28.
  • the stator 6 acts as a solenoid 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne une unité d'entraînement électrique, dans laquelle est intégré un dispositif pour maintenir en position un arbre, comprenant un rotor (4), un stator (6) et un boîtier (7) présentant un moteur électrique (2), un arbre (5) relié au rotor (4), ainsi qu'un dispositif pour maintenir une position et agissant sur l'arbre (5), formé en tant que rouleau de roue libre pouvant être connecté, à double action et intégré au boîtier (7).
PCT/EP2007/059233 2006-09-26 2007-09-04 Unité d'entraînement électrique avec dispositif pour maintenir en position un arbre Ceased WO2008037569A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006045231.3 2006-09-26
DE200610045231 DE102006045231A1 (de) 2006-09-26 2006-09-26 Elektrische Antriebseinheit mit Vorrichtung zur Positionseinhaltung einer Welle

Publications (1)

Publication Number Publication Date
WO2008037569A1 true WO2008037569A1 (fr) 2008-04-03

Family

ID=38670772

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/059233 Ceased WO2008037569A1 (fr) 2006-09-26 2007-09-04 Unité d'entraînement électrique avec dispositif pour maintenir en position un arbre

Country Status (2)

Country Link
DE (1) DE102006045231A1 (fr)
WO (1) WO2008037569A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009039627A1 (de) 2009-09-01 2011-03-03 Schaeffler Technologies Gmbh & Co. Kg Schaltbarer Klemmrollenfreilauf
DE102010000999B4 (de) * 2010-01-19 2018-03-01 Siemens Aktiengesellschaft Dynamoelektrische Maschine mit Läuferblockiereinrichtung
DE102013021877B4 (de) * 2013-12-21 2017-02-23 Thomas Magnete Gmbh Elektromechanische Vorrichtung zur schaltbaren formschlüssigen Verbindung von Rotationskörpern

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933242A1 (de) * 1998-07-16 2000-01-20 Ntn Toyo Bearing Co Ltd Kraftübertragungsvorrichtung für Hybridfahrzeuge
EP1426643A1 (fr) * 2002-12-04 2004-06-09 Ntn Corporation Embrayage à rouleaux et dispositif d'entraínement
DE10344211A1 (de) * 2003-09-24 2005-04-21 Bosch Gmbh Robert Vorrichtung zur Positionseinhaltung einer drehbar oder verschiebbar gelagerten Welle
US20060185956A1 (en) * 2005-02-21 2006-08-24 Makoto Yasui Rotation transmission device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB140380A (en) * 1919-03-18 1920-12-09 Anonima A B G D Soc Improvements in or relating to automatic clutches for shafts
US3050321A (en) * 1957-11-15 1962-08-21 John R Howe Auxiliary drive clutch mechanism
GB2219637B (en) * 1988-06-08 1992-05-06 Mitsubishi Electric Corp Electromagnetic clutch in motor-powered drive device
EP0791748B1 (fr) * 1996-02-26 1999-09-29 Denso Corporation Anneau élastique pour accouplement à roue libre et démarreur utilisant cet anneau
US6135255A (en) * 1998-12-09 2000-10-24 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Resealable roller clutch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933242A1 (de) * 1998-07-16 2000-01-20 Ntn Toyo Bearing Co Ltd Kraftübertragungsvorrichtung für Hybridfahrzeuge
EP1426643A1 (fr) * 2002-12-04 2004-06-09 Ntn Corporation Embrayage à rouleaux et dispositif d'entraínement
DE10344211A1 (de) * 2003-09-24 2005-04-21 Bosch Gmbh Robert Vorrichtung zur Positionseinhaltung einer drehbar oder verschiebbar gelagerten Welle
US20060185956A1 (en) * 2005-02-21 2006-08-24 Makoto Yasui Rotation transmission device

Also Published As

Publication number Publication date
DE102006045231A1 (de) 2008-04-03

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