WO2002030722A2 - Frein a disque a commande electrique pour automobile - Google Patents

Frein a disque a commande electrique pour automobile Download PDF

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Publication number
WO2002030722A2
WO2002030722A2 PCT/EP2001/011709 EP0111709W WO0230722A2 WO 2002030722 A2 WO2002030722 A2 WO 2002030722A2 EP 0111709 W EP0111709 W EP 0111709W WO 0230722 A2 WO0230722 A2 WO 0230722A2
Authority
WO
WIPO (PCT)
Prior art keywords
disc brake
electrically actuated
stator winding
motor vehicle
vehicle disc
Prior art date
Application number
PCT/EP2001/011709
Other languages
German (de)
English (en)
Other versions
WO2002030722A3 (fr
Inventor
Andreas GRÜNDL
Bernhard Hoffmann
Original Assignee
Compact Dynamics 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 Compact Dynamics Gmbh filed Critical Compact Dynamics Gmbh
Priority to AU2002224775A priority Critical patent/AU2002224775A1/en
Publication of WO2002030722A2 publication Critical patent/WO2002030722A2/fr
Publication of WO2002030722A3 publication Critical patent/WO2002030722A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H02K21/227—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos having an annular armature coil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/741—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on an ultimate actuator
    • 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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • 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
    • F16D2121/24—Electric or magnetic using motors
    • 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
    • F16D2125/40—Screw-and-nut

Definitions

  • the invention relates to an electrically actuated motor vehicle disc brake.
  • the invention relates to a disc brake which enables the construction of a so-called dry brake system, i.e. without hydraulic or brake fluid, which is pressed into a cylinder / piston arrangement by a master brake cylinder when the driver actuates the brake pedal via a brake fluid line system.
  • an electric drive serves to bring the brake linings into frictional engagement with the brake disc.
  • Disc brake assemblies of this type are known in the prior art in a wide variety of configurations.
  • piezoelectric linear drives to perform an infeed movement on the brake linings arranged on both sides of a brake disc by means of a corresponding gear.
  • Another proposal provides for the use of linearly acting electromagnets to generate corresponding feed movements of the brake pads.
  • these proposals have so far been unsuccessful due to their considerable problems in converting them into a safe and mass-produced product.
  • the invention is therefore based on the problem of providing an electrically actuatable motor vehicle disk brake which, in particular, efficiently uses the small installation space for wheel brakes available in modern passenger motor vehicles, achieves the high level of reliability of conventional hydraulic brakes and the necessary contact pressure for provides the brake pads on the brake disc with the required speed.
  • an electrically actuable motor vehicle disc brake is provided according to the invention, with a brake caliper and an actuating unit arranged on the brake caliper.
  • the actuation unit is coupled to two friction linings, each of which cooperates with one side surface of a brake disk and is arranged to be displaceable to a limited extent in the brake caliper, wherein one of the friction linings can be brought into frictional engagement with the brake disk by the actuation unit and the other friction lining by the action of a reaction force applied by the brake caliper ,
  • the actuating unit has an electric motor and a gear unit, which is arranged between the electric motor and a friction lining, in order to convert the rotational movement of the electric motor into a translational movement for the friction linings.
  • the electric motor has a stator with at least one ring-shaped stator winding, on the two end faces of which a ring of pole pieces is arranged, the radially inner ends of the pole pieces of a ring being connected to one another and the radially outer end of the pole pieces of both rings protruding laterally. Furthermore, the electric motor has a rotor which at least partially encompasses the stator and which is connected to the input side of the Gear unit is coupled and carries magnets which are arranged opposite the pole shoes of the stator.
  • This arrangement forms a transverse flux motor with which a particularly high power density can be achieved.
  • a planetary gear required in known arrangements for example EP 394 238 B1 or DE 42 29 042 AI
  • EP 394 238 B1 or DE 42 29 042 AI can be saved in this way, which reduces both the construction space and the manufacturing outlay and costs.
  • this concept allows the electric motor to be designed both as an external rotor and as an internal rotor. Because of the possible larger surfaces of the magnets and the larger lever arm (due to the larger diameter of the rotor), preference should be given to the external rotor variant. Nevertheless, the invention covers both embodiments.
  • the efficiency is considerably improved.
  • the annular stator winding allows a very high filling factor of the winding (ratio of the winding wire volume to the total volume of the winding chamber), since on the one hand the winding shape is very simple and on the other hand rectangular wire or a copper strip can also be used in cross section.
  • this stator winding which is very easy to produce, requires only a very thin insulation of the wire used for it, since the individual turns only have a very small voltage difference of the order of one to a few volts. These circumstances also increase the efficiency compared to known arrangements.
  • this motor vehicle disc brake is extremely compact in construction and very easy to manufacture. With such an electrically actuated motor vehicle disc brake, the required contact pressure can be reliably achieved with the dynamics necessary for a correspondingly comfortable regulation of the braking behavior.
  • a gear unit which is preferably designed as a spindle / nut arrangement or as a spindle / ball bearing bush arrangement.
  • the rotor of the electric motor is rotatably connected to the nut or the ball bushing as the input side of the gear unit and the spindle has a translational effect on a brake pad.
  • stator windings arranged coaxially next to one another are provided, the pole shoes arranged on the end faces of a stator winding being offset in the circumferential direction with respect to the pole shoes of an adjacent stator winding.
  • the number of phases corresponding to stator windings and pole shoe rings encompassing them must be provided.
  • the pole shoes of one stator winding can be offset in the circumferential direction with respect to the pole shoes of the adjacent stator winding (s).
  • magnets assigned to a stator winding in relation to the magnets of the adjacent stator winding (s) in the circumferential direction.
  • one or more pole shoes For a particularly simple manufacture and assembly, it is expedient to manufacture one or more pole shoes to be arranged between two stator windings, axially adjacent (with their free ends oriented in opposite directions) and then to assemble them into a ring on which the two stator windings be pushed or plugged in on the side.
  • the / each stator winding In order to be able to introduce the magnetic field generated by the / each stator winding into the pole shoes or their ends facing the magnet, the / each stator winding is arranged on a ring 5 made of sheet iron. This ring made of sheet iron comes into (magnetic) contact when the pole shoes are assembled in the axial direction with their radially inner ends.
  • each of the magnets arranged on the rotor is dimensioned and positioned so that it is aligned with a pole piece of the stator in a predetermined rest position.
  • the magnets are preferably rare earth magnets (for example samarium / cobalt or the like).
  • the magnets are arranged with their radially outer side on a ring made of sheet iron, which serves as the magnetic yoke of the rotor.
  • the pole pieces can either be made of iron powder, the grains of which are electrical or magnetic
  • the variant pressed or sintered from iron powder is easier to manufacture as a mass product, but may have slightly less favorable magnetic properties than the laminated variant.
  • pole pieces form a jointly installable segment of the ring in order to be pushed together with the stator winding.
  • the pole shoes and the stator winding are designed so that they can be connected to one another by coaxial connection.
  • the electric motor is a drive that can be used independently of the application of the electrically actuable motor vehicle disc brake described above.
  • Fig. 1 shows a schematic representation of an electrically actuated motor vehicle disc brake in longitudinal section.
  • FIG. 2a shows a schematic plan view of a segment of a stator with two stator windings in a first embodiment of the invention.
  • FIG. 2b shows a schematic plan view of a segment of a stator with two stator windings in a second embodiment of the invention.
  • FIG. 1 shows an electrically actuable motor vehicle disc brake which has a brake caliper 10 which is essentially U-shaped in cross section and an electromechanical actuating unit 12 arranged on the brake caliper 10.
  • a brake caliper 10 Arranged in the brake caliper 10 on its two legs 10 ′, 10 ′′ are two friction linings 14, 14 ′ (which are accommodated in guides that are not illustrated in any more detail).
  • the two friction linings 14, 14 ′ are arranged on both sides of a brake disk 16 overlapped by the brake caliper 10 and cooperate with a respective side surface 16 ', 16 "of the brake disc 16, which is rotatably fixed with one only partially shown
  • Axle stub 18 is connected.
  • this is a floating caliper arrangement in which one of the friction linings 14 can be brought into frictional engagement with the brake disk 16 by the actuating unit 12 directly and the other friction lining 14 'by the action of a reaction force applied by the brake caliper 10.
  • the actuating unit 12 is attached to the side of the brake caliper 10 and has an electric motor 20 and a gear in the form of a nut / spindle arrangement 22 arranged between the electric motor 20 and a friction lining 14.
  • This gear 22 serves to convert the rotary movement of the electric motor 20 into a longitudinal movement for the friction linings 14, 14 '.
  • the electric motor 20 has a stator 24 with two annular stator windings 26, 26 '. On the two end faces of each stator winding 26, 26 'is a ring of pole shoes 28a, 28b; 28a '28b' (see also FIG. 2a) which partially overlap the outer jacket surface of the respective stator winding 26, 26 'with their free ends 30a, 30b, 30a', 30b 1 .
  • the radially inner ends of the pole shoes 32a, 32b; 32a ', 32b' of a ring are connected to one another by a magnetically conductive, integrally formed ring (not designated further).
  • pole shoes 30a, 30b, 30a ', 30b' of two rings arranged on a stator winding 26, 26 ' alternately engage with one another along the circumference of the respective stator winding 26, 26' and each protrude laterally.
  • the two adjoining rings of pole shoes 28b, 28a ', which are arranged between the two stator windings 26, 26' are configured as uniform components which have an essentially T-shaped configuration (see FIG. 1 below).
  • Each stator winding 26, 26 ' is arranged on a ring 34, 34' made of sheet iron, which serves as a magnetic yoke.
  • the pole pieces are made of sintered iron powder, the grains of which are electrically and magnetically insulated from one another by a plastic coating.
  • the electric motor 20 also has a rotor 40 in the form of an annular cylinder 40a, on the side facing away from the brake caliper 10, an end wall 40b is formed.
  • the rotor 40 with its ring cylinder 40a engages around the stator windings 26, 26 'in the radial and in the axial direction.
  • the end wall 40b of the rotor 40- is coupled to the input side of the gear unit 22 in such a way that the end wall 40b is connected to the nut 22a of the nut / spindle assembly 22 in a rotationally fixed (welded or form-fitting) manner.
  • the nut 22a of the nut / spindle arrangement 22 is rotatably mounted in a flange 48 formed on the leg 10 'of the brake caliper 10, but is not displaceable in the axial direction.
  • the nut 22a is coupled to the spindle 22c via balls 22b, the spindle 22c moving in the longitudinal direction when the nut 22a rotates and thereby pushing the brake pad 14 toward the brake disk 16 or away from it via a pressure plate 52.
  • the invention can be implemented with 1-, 2- or 3-phase motors, with two annular stator windings arranged coaxially next to one another being provided for multiphase motors - as shown in FIG. 2b for a 2-phase motor.
  • the pole shoes arranged on the end faces of a stator winding are arranged offset in the circumferential direction with respect to the pole shoes of an adjacent stator winding, and the magnets of a stator winding are arranged along the circumference of the rotor at the same position (ie not offset from one another).
  • the magnets can also be displaced and the pole pieces of adjacent stator windings have the same position along the circumference of the stator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Abstract

La présente invention concerne un frein à disque à commande électrique pour automobile, comprenant un étrier de frein, une unité de commande, montée sur ledit étrier à frein, ainsi que deux garnitures de friction, qui coopèrent respectivement avec une face latérale d'un disque de frein et qui sont montées dans l'étrier de frein de façon à pouvoir se déplacer de manière limitée. Une des garnitures de friction peut entrer directement en contact par friction avec le disque de frein au moyen de l'unité de commande et l'autre garniture de friction peut entrer en contact par friction avec le disque de frein au moyen d'une force de réaction exercée par l'étrier de frein. L'unité de commande comprend un moteur électrique et une unité de transmission, qui se trouve en liaison fonctionnelle entre le moteur électrique et une garniture de friction et permet de convertir un mouvement de rotation du moteur électrique en un mouvement de translation de la garniture de friction. Le moteur électrique présente un stator qui est pourvu d'au moins un enroulement de stator annulaire, aux deux faces duquel est respectivement montée une couronne de pièces polaires. Les extrémités radiales internes des pièces polaires d'une couronne sont connectées l'une à l'autre et les extrémités radiales externes des pièces polaires de deux couronnes font respectivement saillie de manière latérale. Le moteur électrique présente également un rotor qui entoure au moins partiellement le stator, qui est connecté à la face d'entrée de l'unité de transmission et qui porte des aimants montés de manière opposée aux pièces polaires.
PCT/EP2001/011709 2000-10-11 2001-10-10 Frein a disque a commande electrique pour automobile WO2002030722A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002224775A AU2002224775A1 (en) 2000-10-11 2001-10-10 Electrically actuated automotive disc brake

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000150352 DE10050352C1 (de) 2000-10-11 2000-10-11 Elektrisch betätigbare Kraftfahrzeug-Scheibenbremse
DE10050352.7 2000-10-11

Publications (2)

Publication Number Publication Date
WO2002030722A2 true WO2002030722A2 (fr) 2002-04-18
WO2002030722A3 WO2002030722A3 (fr) 2002-07-18

Family

ID=7659413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/011709 WO2002030722A2 (fr) 2000-10-11 2001-10-10 Frein a disque a commande electrique pour automobile

Country Status (3)

Country Link
AU (1) AU2002224775A1 (fr)
DE (1) DE10050352C1 (fr)
WO (1) WO2002030722A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1502035B1 (fr) 2002-04-26 2008-07-02 Continental Teves AG & Co. oHG Unite d'actionnement pour frein a disque a commande electromecanique
DE10227828B4 (de) * 2002-06-21 2007-06-06 Compact Dynamics Gmbh Elektrisch betätigbare Kraftfahrzeug-Scheibenbremse
US7687961B2 (en) 2005-03-01 2010-03-30 Honda Motor Co., Ltd. Stator, motor, and method of manufacturing such stator
DE102009004474B4 (de) * 2009-01-13 2014-09-25 Tirron-Elektronik Gmbh Transversalflussmaschine mit scheibenförmigen Rotoren
ES2572653T3 (es) * 2009-09-21 2016-06-01 Höganäs Ab Dispositivo de estator y máquina eléctrica

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410006A1 (de) 1984-03-19 1985-09-19 Alfred Teves Gmbh, 6000 Frankfurt Verfahren zur steuerung einer bremsanlage fuer kraftfahrzeuge und vorrichtung zur durchfuehrung des verfahrens
WO1989003490A1 (fr) 1987-10-07 1989-04-20 Allied-Signal Inc. Frein a disque electrique
US4865162A (en) 1986-12-15 1989-09-12 Opus Acquisition Corporation Electrically actuated aircraft brakes
DE4229042A1 (de) 1991-09-02 1993-03-04 Akebono Brake Ind Bremsbetaetigungs-vorrichtung fuer ein fahrzeug
DE19511287A1 (de) 1994-07-21 1996-01-25 Teves Gmbh Alfred Elektromechanische betätigbare Scheibenbremse
DE19543098C2 (de) 1995-05-19 1997-03-20 Continental Ag Bremsaktor für elektrisch betätigbare Fahrzeugbremse
WO1997011287A1 (fr) 1995-09-21 1997-03-27 Lucas Industries Public Limited Company Ameliorations concernant des ensembles frein a disque a actionnement electrique pour vehicules
WO1997017533A1 (fr) 1995-08-10 1997-05-15 Fairbrother, Paul, Garnet Appareil de rinçage
WO1997017553A1 (fr) 1995-11-04 1997-05-15 Lucas Industries Public Limited Company Ameliorations apportees a des ensembles freins a disque electriques de vehicules

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5982073A (en) * 1997-12-16 1999-11-09 Materials Innovation, Inc. Low core loss, well-bonded soft magnetic parts
DE59904085D1 (de) * 1998-11-27 2003-02-27 Bombardier Transp Gmbh Ein- oder mehrphasige Transversalflussmaschine
NO991395L (no) * 1999-03-22 2000-09-25 Lyng Motor As Stator i elektrisk roterende maskin
DE10014226A1 (de) * 2000-03-22 2001-09-27 Bosch Gmbh Robert Elektromechanische Radbremsvorrichtung

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410006A1 (de) 1984-03-19 1985-09-19 Alfred Teves Gmbh, 6000 Frankfurt Verfahren zur steuerung einer bremsanlage fuer kraftfahrzeuge und vorrichtung zur durchfuehrung des verfahrens
US4865162A (en) 1986-12-15 1989-09-12 Opus Acquisition Corporation Electrically actuated aircraft brakes
WO1989003490A1 (fr) 1987-10-07 1989-04-20 Allied-Signal Inc. Frein a disque electrique
EP0394238B1 (fr) 1987-10-07 1992-06-17 AlliedSignal Inc. Frein a disque electrique
DE4229042A1 (de) 1991-09-02 1993-03-04 Akebono Brake Ind Bremsbetaetigungs-vorrichtung fuer ein fahrzeug
DE19511287A1 (de) 1994-07-21 1996-01-25 Teves Gmbh Alfred Elektromechanische betätigbare Scheibenbremse
DE19543098C2 (de) 1995-05-19 1997-03-20 Continental Ag Bremsaktor für elektrisch betätigbare Fahrzeugbremse
WO1997017533A1 (fr) 1995-08-10 1997-05-15 Fairbrother, Paul, Garnet Appareil de rinçage
WO1997011287A1 (fr) 1995-09-21 1997-03-27 Lucas Industries Public Limited Company Ameliorations concernant des ensembles frein a disque a actionnement electrique pour vehicules
WO1997017553A1 (fr) 1995-11-04 1997-05-15 Lucas Industries Public Limited Company Ameliorations apportees a des ensembles freins a disque electriques de vehicules

Also Published As

Publication number Publication date
AU2002224775A1 (en) 2002-04-22
DE10050352C1 (de) 2002-01-03
WO2002030722A3 (fr) 2002-07-18

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