WO2005059395A1 - Hydraulic vehicle brake - Google Patents

Hydraulic vehicle brake Download PDF

Info

Publication number
WO2005059395A1
WO2005059395A1 PCT/EP2004/052693 EP2004052693W WO2005059395A1 WO 2005059395 A1 WO2005059395 A1 WO 2005059395A1 EP 2004052693 W EP2004052693 W EP 2004052693W WO 2005059395 A1 WO2005059395 A1 WO 2005059395A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
hydraulic vehicle
vehicle brake
spindle
threaded nut
Prior art date
Application number
PCT/EP2004/052693
Other languages
German (de)
French (fr)
Inventor
Peter Volz
Original Assignee
Continental Teves Ag & Co. Ohg
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
Priority claimed from DE102004043309A external-priority patent/DE102004043309A1/en
Application filed by Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2005059395A1 publication Critical patent/WO2005059395A1/en

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
    • 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
    • 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
    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/08—Brake-action initiating means for personal initiation hand actuated
    • B60T7/10—Disposition of hand control
    • B60T7/107—Disposition of hand control with electrical power assistance
    • 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
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/003—Position, angle or speed
    • 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
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/005—Force, torque, stress or strain
    • 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
    • F16D2121/02—Fluid pressure
    • 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
    • F16D2123/00—Multiple operation forces
    • 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
    • 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
    • F16D2125/58—Mechanical mechanisms transmitting linear movement
    • F16D2125/582—Flexible element, e.g. spring, other than the main force generating element
    • 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
    • F16D2127/00—Auxiliary mechanisms
    • F16D2127/02—Release mechanisms
    • F16D2127/04—Release mechanisms for manual operation

Definitions

  • the invention relates to a hydraulic vehicle brake with a parking brake device with a brake housing in which a hydraulic operating pressure space is delimited by a brake piston, the parking brake device acting on the brake piston and being locked in the locked state by means of a threaded nut-spindle arrangement driven by an electric motor.
  • Such a hydraulic vehicle brake is known from DE 197 32 168 Cl.
  • a spindle is driven by an electric motor, after which a threaded nut can mechanically lock the brake piston.
  • the output shaft of the electric motor is arranged parallel to the axis of the brake piston at a lateral distance.
  • a Hall sensor records the revolutions of the electric motor and thus the translation of the threaded nut. It is to be regarded as less advantageous with this arrangement that no information about the set clamping force is available.
  • the invention is therefore based on the object of improving a hydraulic vehicle brake of the type mentioned at the outset in such a way that the application force required for carrying out a parking brake operation is set reliably.
  • This object is achieved in that a sensor is provided for the direct detection of the clamping force.
  • the senor is formed by a force sensor, via which the spindle is supported on the housing of the electric motor.
  • the senor is formed by a displacement sensor which detects the movement of the spindle, which is supported on the brake housing via a spring element.
  • a particularly advantageous embodiment of the subject matter of the invention provides that the threaded nut has a radial collar at its end facing the electric motor, which cooperates with a stop on the brake piston.
  • the threaded nut has an anti-rotation device on its outer circumference, which permits axial movements of the threaded nut relative to the brake piston.
  • a self-locking thread is provided between the threaded nut and the spindle to implement a parking brake operation.
  • a hydraulically loadable working memory interacting with the brake piston is provided with at least one integrated spring element, the spring element being designed such that it does not experience any compression during service braking. It is particularly advantageous if the spring element is designed such that the comparison of the compression path of the spring element with the force required for this has a maximum.
  • an electronic control unit is provided for evaluating the current consumption of the electric motor.
  • a mechanical emergency release is provided for releasing the parking brake. It is particularly advantageous that a sleeve is provided which protrudes into the brake piston and is firmly connected to it and receives the threaded nut-spindle arrangement.
  • FIG. 1 shows a partial illustration of a first embodiment of the hydraulic vehicle brake according to the invention in the released state in the axial cross section
  • FIG. 2 shows a partial representation of a second embodiment of the hydraulic brake according to the invention in the released state.
  • the hydraulic vehicle brake according to the invention which is only partially shown in FIG. 1, has a brake housing 1 which encompasses the outer edge of a brake disk (not shown) and two brake linings (not shown).
  • the brake housing 1 forms on its inside a brake cylinder 2 which receives a brake piston 10 axially displaceably.
  • brake fluid are supplied, so that a brake pressure builds up, which moves the brake piston 10 axially towards the brake disk, not shown.
  • a working memory 11, which is formed by a spring element 12, is provided between the brake piston 10 and a force-transmitting part 13 guided in the brake piston 10.
  • the brake lining facing the force-transmitting part 13 is pressed against the brake disk, the brake housing 1 shifting in response in the opposite direction and thereby also pressing the other brake lining against the brake disk.
  • the spring element 12 just mentioned is designed or preloaded such that it does not experience any compression during the service braking just described and prevents relative movements between the brake piston 10 and the force-transmitting part 13. As a result, the axial movement of the brake piston 10 is transmitted directly to the force-transmitting part 13 and there is no increased volume absorption of brake fluid compared to a conventional vehicle brake, which has no working memory 11.
  • a locking device which is required to implement a parking brake function, is formed in the embodiment shown in Fig.l by a spindle gear or a threaded nut-spindle arrangement, which consists of a threaded nut 15 and a spindle 14 which are connected to one another by means of a self-locking thread There is a connection.
  • the threaded nut 15 has on its side facing away from the brake disc a radial collar 16 which interacts with a stop 17 on the brake piston 10.
  • the threaded nut 15 has an anti-rotation device 18 on its outer circumference, which, however, permits axial movements of the threaded nut 15 relative to the brake piston 10.
  • the threaded nut-spindle arrangement just described 14, 15 is received by a sleeve 3, which protrudes into the brake piston 10 and is caulked or snapped firmly with it.
  • the parking brake is locked after a hydraulic pressure has been built up in the operating pressure chamber 23.
  • the pressure applied to carry out a parking brake operation is so high that the working memory 11 is hydraulically loaded or preloaded.
  • the spring element 12 is compressed and the brake piston 10 moves after the brake lining facing the force-transmitting part 13 against the brake disc moves toward the force-transmitting part 13.
  • the electric motor 4 is then energized in such a way that the spindle 14 is driven such that the threaded nut 15 moves to the left in the drawing.
  • the radial collar 16 already mentioned comes to rest against the stop 17 formed on the brake piston 10.
  • the force-transmitting element 13 is supported on the brake piston 10 via the compressed spring element 12, which in turn is supported by the stop 17, the radial collar 16 and the self-locking thread between the threaded nut 15 and the spindle 14 the spindle 14 supports.
  • the spindle 14 is supported by a force sensor 6 on the housing 7 of the electric motor 4, which detects the set clamping force directly.
  • a displacement sensor 26 is provided instead of the force sensor 6.
  • a hydraulic pressure which is high enough to charge or preload the spring element 11, as already described, is again introduced into the operating pressure chamber 23.
  • the radial collar 16 bears against the stop 17 with the aid of the electric motor 4, the applied pressure is released again.
  • the support takes place in the same way as described with reference to FIG. 1.
  • the spindle 14 is supported on the brake housing 1 via a radial collar 24 and a spring element 27.
  • the spindle 14 moves to the right in the drawing and compresses the spring element 27 in the process. This movement of the spindle 14 to the right in the drawing is a measure of the set clamping force, which is detected with the aid of a displacement sensor 26.
  • the spring element 12 described with reference to FIGS. 1 and 2 can also be designed in the vehicle brake according to the invention in such a way that the assignment of the compression path and the associated force has a maximum.
  • Pressure sensors that monitor the pressure build-up to carry out a parking brake operation can thus be dispensed with.
  • the spindle 14 is always pushed to the right in the drawing by the hydraulic input, since the hydraulic pressure acts on the cross-sectional area of the spindle 14. Since the spindle 14 is supported by the force sensor 6 or the displacement sensor 26, the pressure introduced in the operating pressure chamber 23 can be determined by the sensors just mentioned.
  • the vehicle brake according to the invention also has an electronic control unit, not shown, which evaluates the current consumption of the electric motor 4.
  • an electronic control unit not shown, which evaluates the current consumption of the electric motor 4.
  • an emergency release is provided to release the parking brake in an emergency.
  • the emergency release means is preferably designed as an emergency release screw, which is in direct connection with the spindle 14 in order to actuate it manually in the event of a defect in the electric motor 4 or in the event of a failure of the electrical energy supply, as a result of which the threaded nut 15 and thus the radial collar 16 1 and 2 is moved to the right. This releases the parking brake manually.

Abstract

The invention relates to a hydraulic vehicle brake comprising a parking brake device with a brake housing, inside of which a hydraulic operating pressure space is delimited by a brake plunger. The parking brake device acts upon the brake plunger and can be locked in a tensioned state by means of a threaded nut-spindle assembly driven by an electric motor. According to the invention, a sensor is provided for directly detecting the tensioning force, which is provided either in the form of a force sensor, via which the spindle is supported on a housing, or of a displacement sensor that detects the movement of the spindle.

Description

Hydraulische FahrzeugbremseHydraulic vehicle brake
Die Erfindung betrifft eine hydraulische Fahrzeugbremse mit Feststellbremsvorrichtung mit einem Bremsgehäuse, in dem ein hydraulischer Betriebsdruckraum von einem Bremskolben begrenzt ist, wobei die Feststellbremsvorrichtung auf den Bremskolben wirkt und im zugespannten Zustand mittels einer von einem Elektromotor angetriebenen Gewindemutter-Spindel- Anordnung verriegelbar ist.The invention relates to a hydraulic vehicle brake with a parking brake device with a brake housing in which a hydraulic operating pressure space is delimited by a brake piston, the parking brake device acting on the brake piston and being locked in the locked state by means of a threaded nut-spindle arrangement driven by an electric motor.
Aus der DE 197 32 168 Cl ist eine derartige hydraulische Fahrzeugbremse bekannt. Bei der vorbekannten Fahrzeugbremse wird eine Spindel von einem Elektromotor angetrieben, wonach eine Gewindemutter den Bremskolben mechanisch feststellen kann. Dabei ist die Abtriebswelle des Elektromotors mit seitlichem Abstand parallel zur Achse des Bremskolbens angeordnet. Ein Hallsensor erfasst die Umdrehungen des Elektromotors und damit die Translation der Gewindemutter. Als weniger vorteilhaft ist bei dieser Anordnung anzusehen, dass keine Informationen über die eingestellte Zuspannkraft zur Verfügung steht.Such a hydraulic vehicle brake is known from DE 197 32 168 Cl. In the previously known vehicle brake, a spindle is driven by an electric motor, after which a threaded nut can mechanically lock the brake piston. The output shaft of the electric motor is arranged parallel to the axis of the brake piston at a lateral distance. A Hall sensor records the revolutions of the electric motor and thus the translation of the threaded nut. It is to be regarded as less advantageous with this arrangement that no information about the set clamping force is available.
Der Erfindung liegt also die Aufgabe zugrunde, eine hydraulische Fahrzeugbremse der eingangs genannten Gattung dahingehend zu verbessern, dass die Einstellung der zur Durchführung eines Feststellbremsvorganges notwendigen Zuspannkraft zuverlässig erfolgt. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass ein Sensor zur direkten Erfassung der Zuspannkraft vorgesehen ist.The invention is therefore based on the object of improving a hydraulic vehicle brake of the type mentioned at the outset in such a way that the application force required for carrying out a parking brake operation is set reliably. This object is achieved in that a sensor is provided for the direct detection of the clamping force.
Eine vorteilhafte Ausführung des Erfindungsgegenstandes sieht vor, dass der Sensor durch einen Kraftsensor gebildet ist, über welchen sich die Spindel am Gehäuse des Elektromotors abstützt.An advantageous embodiment of the subject matter of the invention provides that the sensor is formed by a force sensor, via which the spindle is supported on the housing of the electric motor.
Bei einer anderen vorteilhaften Ausführung wird der Sensor durch einen Wegsensor gebildet, der die Bewegung der Spindel, die sich über ein Federelement am Bremsgehäuse abstützt, erfasst.In another advantageous embodiment, the sensor is formed by a displacement sensor which detects the movement of the spindle, which is supported on the brake housing via a spring element.
Eine besonders vorteilhafte Ausführung des Erfindungsgegenstandes sieht vor, dass die Gewindemutter an ihrem dem Elektromotor zugewandten Ende einen radialen Kragen aufweist, der mit einem Anschlag am Bremskolben zusammenwirkt.A particularly advantageous embodiment of the subject matter of the invention provides that the threaded nut has a radial collar at its end facing the electric motor, which cooperates with a stop on the brake piston.
Außerdem weist die Gewindemutter an ihrem Außenumfang eine Verdrehsicherung auf, die axiale Bewegungen der Gewindemuter relativ zum Bremskolben zulässt.In addition, the threaded nut has an anti-rotation device on its outer circumference, which permits axial movements of the threaded nut relative to the brake piston.
Zur Realisierung eines Feststellbremsvorganges ist zwischen der Gewindemutter und der Spindel ein selbsthemmendes Gewinde vorgesehen .A self-locking thread is provided between the threaded nut and the spindle to implement a parking brake operation.
Eine vorteilhafte Weiterbildung des Erfindungsgegenstands sieht vor, dass ein mit dem Bremskolben zusammenwirkender, hydraulisch ladbarer Arbeitsspeicher mit mindestens einem integrierten Federelement vorgesehen ist, wobei das Federelement derart ausgelegt ist, dass es während Betriebsbremsungen keine Komprimierung erfährt . Besonders vorteilhaft ist es dabei, wenn das Federelement derart ausgelegt ist, dass der Vergleich des Komprimierungsweges des Federelementes mit der dazu notwendigen Kraft ein Maximum aufweist.An advantageous further development of the subject matter of the invention provides that a hydraulically loadable working memory interacting with the brake piston is provided with at least one integrated spring element, the spring element being designed such that it does not experience any compression during service braking. It is particularly advantageous if the spring element is designed such that the comparison of the compression path of the spring element with the force required for this has a maximum.
Bei einer weiteren Ausführungsform ist eine elektronische Steuereinheit zur Auswertung der Stromaufnahme des Elektromotors vorgesehen.In a further embodiment, an electronic control unit is provided for evaluating the current consumption of the electric motor.
Außerdem ist ein mechanisches Notlösemittel zum Lösen der Feststellbremse vorgesehen. Besonders vorteilhaft ist, dass eine Hülse vorgesehen ist, die in den Bremskolben hinein ragt und mit diesem fest verbunden ist und die Gewindemutter-Spindel-Anordnung aufnimmt.In addition, a mechanical emergency release is provided for releasing the parking brake. It is particularly advantageous that a sleeve is provided which protrudes into the brake piston and is firmly connected to it and receives the threaded nut-spindle arrangement.
Die Erfindung wird nachfolgend anhand von zwei Ausführungs- beispielen im Zusammenhang mit der beiliegenden Zeichnung näher erläutert. In der Zeichnung zeigen:The invention is explained in more detail below on the basis of two exemplary embodiments in conjunction with the accompanying drawing. The drawing shows:
Fig.l eine Teildarstellung einer ersten Ausführung der erfindungsgemäßen hydraulischen Fahrzeugbremse in gelöstem Zustand im axialen Querschnitt,1 shows a partial illustration of a first embodiment of the hydraulic vehicle brake according to the invention in the released state in the axial cross section,
Fig.2 eine Teildarstellung einer zweiten Ausführung der erfindungsgemäßen hydraulischen Bremse in gelöstem Zustand.2 shows a partial representation of a second embodiment of the hydraulic brake according to the invention in the released state.
Die in Fig.l lediglich teilweise dargestellte erfindungsgemäße hydraulische Fahrzeugbremse weist ein Bremsgehäuse 1 auf, welches den äußeren Rand einer nicht dargestellten Bremsscheibe und zwei nicht dargestellte Bremsbeläge umgreift. Das Bremsgehäuse 1 bildet auf seiner Innenseite einen Bremszylinder 2, der einen Bremskolben 10 axial verschiebbar aufnimmt. In den zwischen Bremszylinder 2 und Bremskolben 10 gebildeten Betriebsdruckraum 23 kann mittels eines hydraulischen Anschlusses 9 Bremsflüssigkeit zugeführt werden, so dass sich ein Bremsdruck aufbaut, der den Bremskolben 10 axial zur nicht dargestellten Bremsscheibe hin verschiebt. Zwischen dem Bremskolben 10 und einem im Bremskolben 10 geführten kraftübertragenden Teil 13 ist ein Arbeitsspeicher 11 vorgesehen, der durch ein Federelement 12 gebildet ist. Durch die axiale Verschiebung des Bremskolbens 10 in Richtung der BremsScheibe wird der dem kraftübertragenden Teil 13 zugewandte Bremsbelag gegen die BremsScheibe gedrückt, wobei sich das Bremsgehäuse 1 als Reaktion in der entgegengesetzten Richtung verschiebt und dadurch auch den anderen Bremsbelag gegen die Bremsscheibe drückt. Das eben erwähnte Federelement 12 ist derart ausgelegt bzw. vorgespannt, dass es während der eben beschriebenen Betriebsbremsung keine Komprimierung erfährt und Relativbewegungen zwischen dem Bremskolben 10 und dem kraftübertragenden Teil 13 verhindert. Dadurch wird die axiale Bewegung des Bremskolbens 10 direkt auf das kraftübertragende Teil 13 übertragen und es findet keine erhöhte Volumenaufnahme an Bremsflüssigkeit gegenüber einer herkömmlichen Fahrzeugbremse, die keinen Arbeitsspeicher 11 aufweist, statt.The hydraulic vehicle brake according to the invention, which is only partially shown in FIG. 1, has a brake housing 1 which encompasses the outer edge of a brake disk (not shown) and two brake linings (not shown). The brake housing 1 forms on its inside a brake cylinder 2 which receives a brake piston 10 axially displaceably. In the operating pressure space 23 formed between the brake cylinder 2 and the brake piston 10 can by means of of a hydraulic connection 9 brake fluid are supplied, so that a brake pressure builds up, which moves the brake piston 10 axially towards the brake disk, not shown. A working memory 11, which is formed by a spring element 12, is provided between the brake piston 10 and a force-transmitting part 13 guided in the brake piston 10. Due to the axial displacement of the brake piston 10 in the direction of the brake disk, the brake lining facing the force-transmitting part 13 is pressed against the brake disk, the brake housing 1 shifting in response in the opposite direction and thereby also pressing the other brake lining against the brake disk. The spring element 12 just mentioned is designed or preloaded such that it does not experience any compression during the service braking just described and prevents relative movements between the brake piston 10 and the force-transmitting part 13. As a result, the axial movement of the brake piston 10 is transmitted directly to the force-transmitting part 13 and there is no increased volume absorption of brake fluid compared to a conventional vehicle brake, which has no working memory 11.
Eine Verriegelungsvorrichtung, die zur Realisierung einer Feststellbremsfunktion erforderlich ist, ist bei der in Fig.l dargestellten Ausführung durch ein Spindelgetriebe bzw. eine Gewindemutter-Spindel-Anordnung gebildet, die aus einer Gewindemutter 15 sowie einer Spindel 14, die mittels eines selbsthemmenden Gewindes miteinander in Verbindung stehen, besteht. Dabei weist die Gewindemutter 15 an ihrer der Bremsscheibe abgewandten Seite einen radialen Kragen 16 auf, der mit einem Anschlag 17 am Bremskolben 10 zusammenwirkt. Außerdem weist die Gewindemutter 15 an ihrem Außenumfang eine Verdrehsicherung 18 auf, die jedoch axiale Bewegungen der Gewindemutter 15 relativ zum Bremskolben 10 zu- lässt. Die eben beschriebene Gewindemutter-Spindel-Anordnung 14, 15 wird von einer Hülse 3 aufgenommen, die in den Bremskolben 10 hineinragt und fest mit diesem verstemmt oder verschnappt ist.A locking device, which is required to implement a parking brake function, is formed in the embodiment shown in Fig.l by a spindle gear or a threaded nut-spindle arrangement, which consists of a threaded nut 15 and a spindle 14 which are connected to one another by means of a self-locking thread There is a connection. The threaded nut 15 has on its side facing away from the brake disc a radial collar 16 which interacts with a stop 17 on the brake piston 10. In addition, the threaded nut 15 has an anti-rotation device 18 on its outer circumference, which, however, permits axial movements of the threaded nut 15 relative to the brake piston 10. The threaded nut-spindle arrangement just described 14, 15 is received by a sleeve 3, which protrudes into the brake piston 10 and is caulked or snapped firmly with it.
Die Verriegelung der Feststellbremse erfolgt, nachdem im Betriebsdruckraum 23 ein hydraulischer Druck aufgebaut wurde. Der für die Durchführung eines Feststellbremsvorganges eingesteuerte Druck ist so hoch, dass der Arbeitsspeicher 11 hydraulisch geladen bzw. vorgespannt wird. Dabei wird das Federelement 12 komprimiert und der Bremskolben 10 vollzieht nach Anlage des dem kraftübertragenden Teil 13 zugewandten Bremsbelages an die BremsScheibe eine Bewegung auf das kraftübertragenden Teil 13 zu. Anschließend wird der Elektromotor 4 derart bestromt und damit die Spindel 14 angetrieben, dass sich die Gewindemutter 15 in der Zeichnung nach links bewegt. Der bereits erwähnte radiale Kragen 16 kommt dabei an dem am Bremskolben 10 ausgebildeten Anschlag 17 zur Anlage. Nach einem anschließendem Abbau des im Betriebsdruckraum 23 eingesteuerten hydraulischen Drucks stützt sich das kraftübertragende Element 13 über das komprimierte Federelement 12 am Bremskolben 10 ab, der sich wiederum über den Anschlag 17, den radialen Kragen 16 und das selbsthemmende Gewinde zwischen Gewindemutter 15 und Spindel 14 an der Spindel 14 abstützt. Die Spindel 14 stützt sich in dem in Fig. 1 dargestellten ersten Ausführungsbeispiel über einen Kraftsensor 6 am Gehäuse 7 des Elektromotors 4 ab, der direkt die eingestellte Zuspannkraft erfasst.The parking brake is locked after a hydraulic pressure has been built up in the operating pressure chamber 23. The pressure applied to carry out a parking brake operation is so high that the working memory 11 is hydraulically loaded or preloaded. The spring element 12 is compressed and the brake piston 10 moves after the brake lining facing the force-transmitting part 13 against the brake disc moves toward the force-transmitting part 13. The electric motor 4 is then energized in such a way that the spindle 14 is driven such that the threaded nut 15 moves to the left in the drawing. The radial collar 16 already mentioned comes to rest against the stop 17 formed on the brake piston 10. After a subsequent reduction in the hydraulic pressure introduced in the operating pressure chamber 23, the force-transmitting element 13 is supported on the brake piston 10 via the compressed spring element 12, which in turn is supported by the stop 17, the radial collar 16 and the self-locking thread between the threaded nut 15 and the spindle 14 the spindle 14 supports. In the first exemplary embodiment shown in FIG. 1, the spindle 14 is supported by a force sensor 6 on the housing 7 of the electric motor 4, which detects the set clamping force directly.
Während eines Feststellbremsvorganges wird aufgrund des geladenen Arbeitsspeichers 10 erreicht, dass die auf die nicht dargestellten Bremsbeläge einwirkende Zuspannkraft von thermisch bedingten Längenänderungen und Einflüssen im Bereich des Bremssattels nahezu unabhängig ist. Das bedeutet unter anderem, dass auch bei Abkühlung des zuvor durch Reibung aufgeheizten Bremssattels, die Zuspannkraft nie unter einen sicherheitskritischen Wert abfällt. Zum Lösen der Feststellbremse wird im Betriebsdruckraum 23 ein hydraulischer Druck aufgebaut, der zur Entlastung der Gewindemutter 15 führt, so dass die Spindel 14 vom Elektromotor 4 betätigt werden kann. Der Elektromotor 4 muss dabei nur geringe Motordrehmomente aufbringen und benötigt nur wenig elektrische Energie. Durch die Betätigung des Elektromotors 4 wird die Gewindemutter 15 in der Zeichnung nach rechts verschoben, bis der radiale Kragen 16 an einem weiteren Anschlag 21 im Bremsgehäuse 1 anliegt. Die Bewegungen des Bremskolbens 10 werden in diesem gelösten Zustand der Feststellbremse nicht von der Gewindemutter-Spindel-Anordnung eingeschränkt .During a parking brake operation it is achieved due to the loaded working memory 10 that the application force acting on the brake pads, not shown, is almost independent of thermally induced changes in length and influences in the area of the brake caliper. Among other things, this means that even when the brake caliper, which was previously heated by friction, cools down, the clamping force never falls below one safety-critical value drops. To release the parking brake, a hydraulic pressure is built up in the operating pressure chamber 23, which relieves the pressure on the threaded nut 15, so that the spindle 14 can be actuated by the electric motor 4. The electric motor 4 only has to apply low motor torques and requires little electrical energy. By actuating the electric motor 4, the threaded nut 15 is shifted to the right in the drawing until the radial collar 16 abuts another stop 21 in the brake housing 1. The movements of the brake piston 10 are not restricted by the threaded nut-spindle arrangement in this released state of the parking brake.
Bei dem in Fig. 2 dargestellten Ausführungsbeispiel ist anstelle des Kraftsensors 6 ein Wegsensor 26 vorgesehen. Zur Durchführung eines Feststellbremsvorganges wird wiederum ein hydraulischer Druck in den Betriebsdruckraum 23 eingesteuert, der hoch genug ist, um das Federelement 11, wie bereits beschrieben, zu laden bzw. vorzuspannen. Nachdem mit Hilfe des Elektromotors 4 der radiale Kragen 16 am Anschlag 17 anliegt, wird der eingesteuerte Druck wieder abgelassen. Die Abstützung findet in derselben Weise, wie anhand von Fig. 1 beschrieben, statt. Allerdings stützt sich die Spindel 14 bei der in Fig. 2 dargestellten Aus ührungsform über einen radialen Kragen 24 und ein Federelement 27 am Bremsgehäuse 1 ab. Beim Abbau des hydraulischen Drucks bewegt sich die Spindel 14 in der Zeichnung nach rechts und komprimiert dabei das Federelement 27. Diese Bewegung der Spindel 14 in der Zeichnung nach rechts ist ein Maß für die eingestellte Zuspannkraft, die mit Hilfe eines Wegsensors 26 erfasst wird.In the embodiment shown in FIG. 2, a displacement sensor 26 is provided instead of the force sensor 6. To carry out a parking brake operation, a hydraulic pressure which is high enough to charge or preload the spring element 11, as already described, is again introduced into the operating pressure chamber 23. After the radial collar 16 bears against the stop 17 with the aid of the electric motor 4, the applied pressure is released again. The support takes place in the same way as described with reference to FIG. 1. However, in the embodiment shown in FIG. 2, the spindle 14 is supported on the brake housing 1 via a radial collar 24 and a spring element 27. When the hydraulic pressure is reduced, the spindle 14 moves to the right in the drawing and compresses the spring element 27 in the process. This movement of the spindle 14 to the right in the drawing is a measure of the set clamping force, which is detected with the aid of a displacement sensor 26.
Das anhand von Fig. 1 und Fig. 2 beschriebene Federelement 12 kann bei der erfindungsgemäßen Fahrzeugbremse auch derart ausgebildet sein, dass die Zuordnung des Komprimierungsweges und der zugehörigen Kraft ein Maximum aufweist. Bei der Verwendung einer hydraulischen Pumpe zum für den Feststellbremsvorgang notwendigen Druckaufbau hat dies zur Folge, dass die Messung des Stroms des Pumpenmotors ebenfalls ein Maximum aufweist. Wenn dieses Maximum erkannt wird, kann man auf ein komprimiertes Federpaket 12 und damit auf einen ausreichenden Druckaufbau im Betriebsdruckraum 23 schließen. Auf Drucksensoren, die den Druckaufbau zur Durchführung eines Feststellbremsvorganges überwachen, kann somit verzichtet werden. Außerdem wird die Spindel 14 vom eingesteuerten hydraulischen stets in der Zeichnung nach rechts gedrückt, da der hydraulische Druck auf die Querschnittsfläche der Spindel 14 wirkt. Da sich die Spindel 14 über den Kraftsensor 6 bzw. den Wegsensor 26 abstützt, ist der im Betriebsdruckraum 23 eingesteuerte Druck durch die eben genannten Sensoren ermittelbar.The spring element 12 described with reference to FIGS. 1 and 2 can also be designed in the vehicle brake according to the invention in such a way that the assignment of the compression path and the associated force has a maximum. When using a hydraulic pump to build up the pressure required for the parking brake operation, this means that the measurement of the current of the pump motor also has a maximum. If this maximum is recognized, a compressed spring assembly 12 and thus an adequate pressure build-up in the operating pressure chamber 23 can be concluded. Pressure sensors that monitor the pressure build-up to carry out a parking brake operation can thus be dispensed with. In addition, the spindle 14 is always pushed to the right in the drawing by the hydraulic input, since the hydraulic pressure acts on the cross-sectional area of the spindle 14. Since the spindle 14 is supported by the force sensor 6 or the displacement sensor 26, the pressure introduced in the operating pressure chamber 23 can be determined by the sensors just mentioned.
Die erfindungsgemäße Fahrzeugbremse weist außerdem eine nicht dargestellte elektronische Steuereinheit auf, die die Stromaufnahme des Elektromotors 4 auswertet. Durch die Auswertung der Stromaufnahme des Elektromotors 4 wird der Kontakt zwischen dem radialen Kragen 16 der Gewindemutter 15 und dem Anschlag 17, der am Bremskolben 10 ausgebildet ist, und zwischen radialen Kragen 16 und dem im Bremsgehäuse 1 ausgebildeten Anschlag 21 erfasst. Dadurch ist eine weitere Überwachung der Feststellbremsfunktion möglich.The vehicle brake according to the invention also has an electronic control unit, not shown, which evaluates the current consumption of the electric motor 4. By evaluating the current consumption of the electric motor 4, the contact between the radial collar 16 of the threaded nut 15 and the stop 17, which is formed on the brake piston 10, and between the radial collar 16 and the stop 21 formed in the brake housing 1 is detected. This enables further monitoring of the parking brake function.
Dadurch dass zu Beginn und zur Beendigung ein hydraulischer Druck im Betriebsdruckraum 23 aufgebaut wird, muss der E- lektromotor 4 nur geringe Motordrehmomente aufbringen und benötigt nur wenig elektrische Energie. Der Einsatz eines leistungsschwachen, kostengünstigen Elektromotors 4 ist also möglich. Außerdem ist ein Notlösemittel zum Lösen der Feststellbremse im Notfall vorgesehen. Das Notlösemittel ist dabei vorzugsweise als Notlöseschraube ausgebildet, die in direkter Verbindung mit der Spindel 14 steht, um diese bei einem Defekt des Elektromotors 4 oder bei einem Ausfall- der elektrischen Energieversorgung manuell direkt zu betätigen, wodurch die Gewindemutter 15 und damit der radiale Kragen 16 in den Fig. 1 und 2 nach rechts bewegt wird. Dadurch wird die Feststellbremse manuell gelöst. Because a hydraulic pressure is built up in the operating pressure chamber 23 at the beginning and at the end, the electric motor 4 only has to apply small motor torques and requires little electrical energy. The use of a low-power, inexpensive electric motor 4 is therefore possible. In addition, an emergency release is provided to release the parking brake in an emergency. The emergency release means is preferably designed as an emergency release screw, which is in direct connection with the spindle 14 in order to actuate it manually in the event of a defect in the electric motor 4 or in the event of a failure of the electrical energy supply, as a result of which the threaded nut 15 and thus the radial collar 16 1 and 2 is moved to the right. This releases the parking brake manually.

Claims

Patentansprüche claims
1. Hydraulische Fahrzeugbremse mit Feststellbremsvorrichtung mit einem Bremsgehäuse (1) , in dem ein hydraulischer Betriebsdruckraum (23) von einem Bremskolben (10) begrenzt ist, wobei die Feststellbremsvorrichtung auf den Bremskolben (10) wirkt und im zugespannten Zustand mittels einer von einem Elektromotor (4) angetriebenen Gewindemutter-Spindel-Anordnung (14, 15) verriegelbar ist, dadurch gekennzeichnet, dass ein Sensor zur direkten Erfassung der Zuspannkraft vorgesehen ist.1.Hydraulic vehicle brake with a parking brake device having a brake housing (1) in which a hydraulic operating pressure space (23) is delimited by a brake piston (10), the parking brake device acting on the brake piston (10) and in the applied state by means of an electric motor ( 4) driven threaded nut-spindle arrangement (14, 15) can be locked, characterized in that a sensor is provided for the direct detection of the clamping force.
2. Hydraulische Fahrzeugbremse nach Anspruch 1, dadurch gekennzeichnet, dass der Sensor durch einen Kraftsensor (6) gebildet ist, über welchen sich die Spindel (14) an einem Gehäuse (7) des Elektromotors (4) abstützt.2. Hydraulic vehicle brake according to claim 1, characterized in that the sensor is formed by a force sensor (6), via which the spindle (14) is supported on a housing (7) of the electric motor (4).
3. Hydraulische Fahrzeugbremse nach Anspruch 1, dadurch gekennzeichnet, dass der Sensor durch einen Wegsensor (26) gebildet ist, der die Bewegung der Spindel (14) , die sich über ein Federelement (27) am Bremsgehäuse (1) abstützt, erfasst.3. Hydraulic vehicle brake according to claim 1, characterized in that the sensor is formed by a displacement sensor (26) which detects the movement of the spindle (14), which is supported on the brake housing (1) via a spring element (27).
4. Hydraulische Fahrzeugbremse nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass die Gewindemutter (15) an ihrem dem Elektromotor (4) zugewandten Ende einen radialen Kragen (16) aufweist, der mit einem Anschlag (17) am Bremskolben zusammenwirkt.4. Hydraulic vehicle brake according to claim 1 to 3, characterized in that the threaded nut (15) at its end facing the electric motor (4) has a radial collar (16) which interacts with a stop (17) on the brake piston.
5. Hydraulische Fahrzeugbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gewinde- mutter (15) an ihrem Außenumfang eine Verdrehsicherung (18) aufweist, die axiale Bewegungen der Gewindemuter (15) relativ zum Bremskolben (10) zulässt.5. Hydraulic vehicle brake according to one of the preceding claims, characterized in that the threaded nut (15) has on its outer circumference an anti-rotation device (18) which permits axial movements of the threaded nut (15) relative to the brake piston (10).
6. Hydraulische Fahrzeugbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen der Gewindemutter (15) und der Spindel (14) ein selbsthemmendes Gewinde vorgesehen ist.6. Hydraulic vehicle brake according to one of the preceding claims, characterized in that a self-locking thread is provided between the threaded nut (15) and the spindle (14).
7. Hydraulische Fahrzeugbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein mit dem Bremskolben (10) zusammenwirkender, hydraulisch ladbarer Arbeitsspeicher (11) mit mindestens einem Federelement (12) vorgesehen ist, wobei das Federelement (12) derart ausgelegt ist, dass es während Betriebsbremsungen keine Komprimierung erfährt.7. Hydraulic vehicle brake according to one of the preceding claims, characterized in that a with the brake piston (10) cooperating, hydraulically loadable working memory (11) is provided with at least one spring element (12), the spring element (12) being designed such that it is not compressed during service braking.
8. Hydraulische Fahrzeugbremse nach Anspruch 8, dadurch gekennzeichnet, dass das Federelement (12) derart ausgelegt ist, dass der Vergleich des Komprimierungsweges des Federelementes (12) mit der dazu notwendigen Kraft ein Maximum aufweist.8. Hydraulic vehicle brake according to claim 8, characterized in that the spring element (12) is designed such that the comparison of the compression path of the spring element (12) with the necessary force has a maximum.
9. Hydraulische Fahrzeugbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine elektronische Steuereinheit zur Auswertung der Stromaufnahme des Elektromotors (4) vorgesehen ist.9. Hydraulic vehicle brake according to one of the preceding claims, characterized in that an electronic control unit for evaluating the current consumption of the electric motor (4) is provided.
10. Hydraulische Fahrzeugbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein mechanisches Notlösemittel zum Lösen der Feststellbremse vorgesehen ist.10. Hydraulic vehicle brake according to one of the preceding claims, characterized in that a mechanical emergency release means is provided for releasing the parking brake.
11. Hydraulische Fahrzeugbremse nach einem der vorhergehen- den Ansprüche, dadurch gekennzeichnet, dass eine Hülse (3) vorgesehen ist, die in den Bremskolben (10) hinein ragt und mit diesem fest verbunden ist und die Gewindemutter-Spindel-Anordnung (14, 15) aufnimmt. 11. Hydraulic vehicle brake according to one of the previous the claims, characterized in that a sleeve (3) is provided which protrudes into the brake piston (10) and is fixedly connected to it and receives the threaded nut-spindle arrangement (14, 15).
PCT/EP2004/052693 2003-12-17 2004-10-28 Hydraulic vehicle brake WO2005059395A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10359474 2003-12-17
DE10359474.4 2003-12-17
DE102004043309.7 2004-09-08
DE102004043309A DE102004043309A1 (en) 2003-12-17 2004-09-08 Hydraulic vehicle brake has parking brake device acting on brake piston and lockable in tensioned state by motor-driven threaded nut spindle assembly with sensor directly detecting tension force

Publications (1)

Publication Number Publication Date
WO2005059395A1 true WO2005059395A1 (en) 2005-06-30

Family

ID=34701995

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/052693 WO2005059395A1 (en) 2003-12-17 2004-10-28 Hydraulic vehicle brake

Country Status (1)

Country Link
WO (1) WO2005059395A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010033273A1 (en) * 2010-08-03 2012-02-09 Lucas Automotive Gmbh A vehicle brake system for a motor vehicle and method for driving the vehicle brake system when releasing the parking brake function
WO2016034314A1 (en) * 2014-09-01 2016-03-10 Robert Bosch Gmbh Braking device for a motor vehicle, and method for controlling the braking device
EP3578429A1 (en) * 2018-06-06 2019-12-11 Sensata Technologies, Inc. Connector for an electromechanical brake
DE102004060906B4 (en) 2004-12-17 2024-02-22 Robert Bosch Gmbh Locking device for locking an automated parking brake in vehicles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4995483A (en) * 1989-12-18 1991-02-26 Aircraft Braking Systems Corporation Motor position feedback controlled electrically actuated aircraft brake
US5000521A (en) * 1984-12-25 1991-03-19 Nippondenso Co., Ltd. Vehicle braking control apparatus
US6000507A (en) * 1995-09-30 1999-12-14 Itt Manufacturing Enterprises Inc. Control or adjustment system for a wheel brake operated by an electric motor
US6394235B1 (en) * 1997-07-25 2002-05-28 Lucas Industries Plc Hydraulic vehicle brake with blocking means and method for operating same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000521A (en) * 1984-12-25 1991-03-19 Nippondenso Co., Ltd. Vehicle braking control apparatus
US4995483A (en) * 1989-12-18 1991-02-26 Aircraft Braking Systems Corporation Motor position feedback controlled electrically actuated aircraft brake
US6000507A (en) * 1995-09-30 1999-12-14 Itt Manufacturing Enterprises Inc. Control or adjustment system for a wheel brake operated by an electric motor
US6394235B1 (en) * 1997-07-25 2002-05-28 Lucas Industries Plc Hydraulic vehicle brake with blocking means and method for operating same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004060906B4 (en) 2004-12-17 2024-02-22 Robert Bosch Gmbh Locking device for locking an automated parking brake in vehicles
DE102010033273A1 (en) * 2010-08-03 2012-02-09 Lucas Automotive Gmbh A vehicle brake system for a motor vehicle and method for driving the vehicle brake system when releasing the parking brake function
US9340192B2 (en) 2010-08-03 2016-05-17 Lucas Automotive Gmbh Vehicle brake system for a motor vehicle and method for actuating the vehicle brake system during release of the parking brake function
WO2016034314A1 (en) * 2014-09-01 2016-03-10 Robert Bosch Gmbh Braking device for a motor vehicle, and method for controlling the braking device
US10697510B2 (en) 2014-09-01 2020-06-30 Robert Bosch Gmbh Braking device for a motor vehicle, and method for controlling the braking device
EP3578429A1 (en) * 2018-06-06 2019-12-11 Sensata Technologies, Inc. Connector for an electromechanical brake
US10744981B2 (en) 2018-06-06 2020-08-18 Sensata Technologies, Inc. Electromechanical braking connector

Similar Documents

Publication Publication Date Title
EP0996560B1 (en) Hydraulic vehicle brake with blocking means
EP1554504B1 (en) Hydraulic vehicle brake
DE102008062180B4 (en) Combined vehicle brake with electromechanically actuated parking brake
EP2200879B1 (en) Method for the secure release of an electromechanically actuatable parking brake
WO1996023685A1 (en) Combined service and parking brake
EP2414698A1 (en) Electromechanical vehicle brake
DE10150803A1 (en) Hydraulic vehicle brake with electrically operated parking device, has electronic control unit that varies electric motor control signals depending on sensor signals representing operating states
EP1438519B8 (en) Actuator with a force transducer for a disc brake
DE102006009089A1 (en) Drum brake e.g. simplex brake, for vehicle, has parking brake actuator actuated by electrical drive, where parking brake actuator presses two brake linings against brake drum for locking vehicle
DE102006001546A1 (en) Hydraulic brake for motor vehicle has brake housing with reservoir piston exposed to operating piston pressure
EP1714048B1 (en) Hydraulic vehicle-brake
EP1697188A1 (en) Automatic parking brake
EP1716351B1 (en) Hydraulic brake equipped with a locking device for a vehicle and related operating method
DE102004043309A1 (en) Hydraulic vehicle brake has parking brake device acting on brake piston and lockable in tensioned state by motor-driven threaded nut spindle assembly with sensor directly detecting tension force
DE10329694A1 (en) Hydraulic vehicle brake for motor vehicles, has parking brake device that can be used to charge energy accumulator, and which can be actuated by pressure regulated in service pressure chamber of brake housing
WO2005059395A1 (en) Hydraulic vehicle brake
DE102004046871A1 (en) Parking brake system, especially for motor vehicles, has auxiliary hydraulic piston that can be loaded against force of spring and that interacts with electromechanical control device
WO2006128759A1 (en) Parking drum brake
DE102006001543A1 (en) Vehicle hydraulic brake with integral parking brake, includes electromagnetic actuator, nut and spindle assembly and hydraulic accumulator
DE102005015726B4 (en) Automotive parking brake with position sensor
DE102004062810A1 (en) Hydraulic brake esp. for motor vehicles has power transmission element moved opposite to brake piston actuation direction, and locked by electromagnetic/ electromechanical actuator
DE102007027946A1 (en) Electric brake actuator for motor vehicle parking brake, has brake piston and elastic element, which acts elastic force for clamping parking brake of brake piston
WO2004041608A2 (en) Hydraulic vehicle brake
EP1458601B1 (en) Parking brake device and control method
DE102004055876B4 (en) Electrically operated parking brake with multi-stage locking process

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase