EP1654143A2 - Actionneur pour un frein de stationnement - Google Patents

Actionneur pour un frein de stationnement

Info

Publication number
EP1654143A2
EP1654143A2 EP04740903A EP04740903A EP1654143A2 EP 1654143 A2 EP1654143 A2 EP 1654143A2 EP 04740903 A EP04740903 A EP 04740903A EP 04740903 A EP04740903 A EP 04740903A EP 1654143 A2 EP1654143 A2 EP 1654143A2
Authority
EP
European Patent Office
Prior art keywords
actuator
rotor
actuator according
locking
spindle
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.)
Withdrawn
Application number
EP04740903A
Other languages
German (de)
English (en)
Inventor
Günter Hartig
Manfred Kraus
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.)
IHO Holding GmbH and Co KG
Original Assignee
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
Priority claimed from DE102004030939A external-priority patent/DE102004030939A1/de
Application filed by Schaeffler KG filed Critical Schaeffler KG
Publication of EP1654143A2 publication Critical patent/EP1654143A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60T13/746—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 and mechanical transmission of the braking action
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/04—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically
    • B60T11/046—Using cables

Definitions

  • the present invention relates to an actuator of a parking brake of a motor vehicle. Parking brakes actuated with an actuator can be automatically determined when parking and can be released automatically when the vehicle is started again. These parking brakes can also be referred to as active parking brakes.
  • the generally electromechanical actuators include an electric motor that actuates the parking brake via an actuator.
  • the actuator can include a transmission. These actuators are intended to enable the parking brake to be released and applied quickly.
  • the object of the present invention is to provide an actuator of a parking brake for a motor vehicle which is simple in construction and can be operated reliably.
  • the actuator according to the invention has the advantage that the rotor of the electric motor drives the threaded spindle directly, and there is no transmission between the rotor and the threaded spindle.
  • the spindle nuts known per se, arranged on the threaded spindle, work very low-friction, since a relative rotation between the spindle nut and the threaded spindle takes place with the rolling of rolling elements on threaded paths of the spindle nut and the threaded spindle.
  • the combination of direct drive and rolling element screw drive enables a drive with very high mechanical efficiency.
  • the spindle nut cooperating with the threaded spindle form a rolling element screw drive known per se, which works reliably. tet.
  • the actuator according to the invention is compact and inexpensive to manufacture due to the omission of an intermediate gear. Because of the low friction losses, the electric motor can be made smaller.
  • the spindle nut moves axially with rotation of the threaded spindle, since a rolling element screw drive is a Rot-Trans gear.
  • the cable pull acting on the spindle nut is tensioned by pulling under the axial displacement of the spindle nut.
  • the spindle nut loosens in the opposite direction.
  • the actuator according to the invention enables a pretensioning force of approx. 1600 N per wheel side.
  • the clamping path - i.e. the path of the spindle nut - can be about 25 mm.
  • the actuation time can be reduced to approximately 700 milliseconds, at a spindle speed of approximately 1250 rpm. Fast actuation times are possible.
  • a locking device can be provided which secures the rotor and / or the threaded spindle against rotation.
  • This locking can expediently take place mechanically, for example by interlocking interlocking locking elements, one of which is non-rotatably fixed to the rotor and the other of which is in any case fixed in the directions of rotation of the rotor.
  • a displaceable piston can engage in a gap of a toothed disk delimited by teeth. The tensile load of the pull rope can exert a torque on the threaded spindle or the rotor.
  • an emergency release device is recommended.
  • this emergency release device which can be operated by hand, for example - the locking device can be overridden.
  • the locking device described by way of example it is necessary to remove the load of the pressing toothed disk from the piston so that the piston can spring out of its locking position under the spring force.
  • a torque is now exerted by hand which counteracts a torque exerted by the load of the pull rope. This means that the pressure is released from the piston so that the piston can rebound. The parking brake is then released.
  • the emergency unlocking device has a belt that wraps around the toothed disk and that has a pocket in the looping area into which the teeth of the toothed disk are immersed, the toothed disk can first rotate without coming into contact with the belt.
  • the band is provided with a cross bar which can engage in a gap in the toothed disc
  • the emergency release device can operate as follows. The band is attached to a tension spring at one end. The other end is now being pulled. The belt now moves along the circumference of the toothed pulley, the crossbar engaging in the gap. With further movement of the belt, the toothed disc is now taken along and the piston of the locking device is relieved, so that it can spring out of the gap.
  • FIG. 1 shows a perspective view of an actuator of a parking brake of a motor vehicle
  • Figure 2 shows a part of the actuator of Figure 1 in longitudinal section
  • FIG. 3 shows a further perspective illustration of the actuator according to the invention according to FIG. 1.
  • the actuator of a parking brake of a motor vehicle according to the invention shown in FIGS. 1 and 3 is provided with an electric motor 1, the rotor 2 of which has a threaded spindle 3.
  • a spindle nut 4 is arranged on the threaded spindle 3.
  • the spindle nut 4 is clearly shown in Figure 2 in longitudinal section. This figure 2 shows that between the threaded spindle 3 and the spindle nut 4 rolling elements 5 are in rolling engagement with threaded paths 6, 7 formed on the spindle nut 4 and the threaded spindle 3.
  • the spindle nut 4 and the threaded spindle 3 form a ball screw drive 9, the rolling elements being formed by balls 5 a which run in the endless ball tracks 10.
  • the ball tracks 10 are limited by the threaded tracks 6, 7 of the threaded spindle 3 and the spindle nut 4.
  • the rotor 2 has two opposite ends, which are arranged on both sides of a motor housing 1 a of the electric motor 1.
  • One of the threaded spindles 3 is connected to both ends of the rotor 2.
  • This thread Spindle 3 is arranged coaxially to the rotor 2 and connected to it in a rotationally fixed manner. These two threaded spindles 3 have thread sections of opposite pitch.
  • a spindle nut 4 is arranged on each thread section.
  • a cable bearing 4a is fastened to each spindle nut 4. Cables 8 are suspended in the two cable bearings 4a. The cables 8 each engage one of the parking brakes of the motor vehicle.
  • FIG. 3 shows that the cable pull bearings 4a are arranged to be displaceable along a slide 26, which is only shown in broken lines here, this slide 26 serving as an anti-rotation device for the cable pull bearing 4a and the spindle nut 4.
  • FIG. 3 also shows a locking device 11, which prevents the rotor 2 and thus the threaded spindle 3 from rotating when the electric motor 1 is de-energized.
  • This locking device 11 has a first locking element 12, which is non-rotatably connected to the rotor 2, and a movably arranged second locking element 13, the two locking elements 12, 13 interlocking in the locking position to prevent rotation of the rotor 2.
  • the first locking element 12 has a toothed disk 15 which is received on the rotor 2 in a manner fixed against relative rotation, on the circumference of which a plurality of teeth 16 are formed which are arranged distributed over the circumference on gap 17.
  • the locking device 11 further comprises an electromagnet 14 which is fixed to the frame and which is provided with the second locking element 13.
  • the locking element 13 moves into the locking position when the electromagnet 14 is actuated, the locking position being reached when the second locking element 13 engages in the gap 17.
  • the second locking element 13 is formed here by a piston 18.
  • the piston 18 is acted upon by spring force and can be moved into the locking position against the spring force by actuating the electromagnet 14.
  • the ball screw 9 forms an actuator which is driven by the rotor 2. Instead of the ball screw drive, other Rot-Trans gears are also possible.
  • FIG. 3 also shows an emergency release device 19 for relieving the locking device 11 of a load applied to tension the brake.
  • This emergency release device 19 has a band 20 arranged transversely to the rotor axis, which wraps around a contact surface 21 arranged coaxially to the rotor axis.
  • This contact surface 21 is formed on the toothed disc 15, namely axially on both sides of the teeth 16.
  • the band 20 has webs or straps 23 which extend in the longitudinal direction of the band 20, the straps 23 being able to be brought into contact with the contact surface 21.
  • the two webs or straps 23 delimit a large pocket 24 which is delimited along the belt by a catch 22.
  • this catch 22 is designed as a transverse web 22a which connects the two belts 23 to one another.
  • One end of the band is connected to a tension spring 27, which in turn is fixed to the frame on a housing 25.
  • the other end of the tape engages a cable 28.
  • the belt 20 By pulling on the cable 28, the belt 20 lies with its belts 23 against the contact surface 21 of the toothed disk 15 and is moved counterclockwise relative to the toothed disk 15, this belt movement taking place with the tension spring 27 being deflected.
  • the electric motor 1 To activate the parking brakes, not shown, the electric motor 1 is actuated. With the rotation of the rotor 2 and the threaded spindles 3, the spindle nut 4 is displaced axially along the threaded spindle 3, specifically in the direction of the motor housing 1a.
  • the cable pulls 8 are tensioned under this shifting of the cable pull bearings 4 a, the parking brakes being activated as a result of the actuation of the cable pulls 8.
  • the electric motor 1 When the electric motor 1 is de-energized, the piston 18 of the locking device 11 moves into the next possible Gap 17.
  • the toothed disc 5 - and thus the rotor 2 - is now locked and secured against rotation.
  • the piston 18 To release the parking brake, the piston 18 must first be moved out of the gap 17 again. However, this can initially be made more difficult by the fact that one of the two teeth arranged adjacent to the piston 18 presses against the piston 18 under a torque acting on the toothed disk 15.
  • the electric motor 1 can be briefly confirmed or, if necessary, the emergency release device 19 if the electric motor 1 has failed, for example.
  • a handle connected to the cable 28 can be provided in the passenger compartment in order to be able to pull the cable 28. Under the pull of the cable 28, the band 20 is now moved. The catch 22 of the band 20 shown in FIG. 3 finally comes into a gap 17. When the band moves further, the toothed disc 15 is now entrained.
  • the piston 18 is now relieved of pressure under this positive entrainment. Finally, the pressure is reduced to such an extent that the piston 18 springs back under spring force and disengages from the gap 17. Now the toothed disc 15 can be rotated again, and thus also the rotor 2 and the threaded spindle 3. Now the spindle nuts 4 can be displaced away from the motor housing 1a along the threaded spindle 3 while relieving the cable pulls 8, whereby the parking brakes are released.
  • Electric motor 25 housing a motor housing 26 gate rotor 27 tension spring threaded spindle 28 cable pull spindle nut cable pull bearing rolling element ball ball thread thread cable cable ball screw drive0 ball track1 locking device2 locking element3 locking element4 electromagnet5 tooth lock washer6 tooth7 gap8 piston9 emergency release device0 belt1 contact surface2 detent2a crossbar3 belt3

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne un actionneur pour un frein de stationnement d'un véhicule automobile, comportant un moteur électrique (1) dont le rotor (2) présente une broche filetée (3) sur laquelle est monté un écrou (4). Entre la broche filetée (3) et l'écrou (4), des corps de roulement (5) sont en contact avec des pistes filetées (6, 7) formées sur l'écrou (4) et la broche filetée (3). Un câble de commande (8) servant à actionner un frein vient en contact avec l'écrou (4).
EP04740903A 2003-08-14 2004-07-10 Actionneur pour un frein de stationnement Withdrawn EP1654143A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10337801 2003-08-14
DE102004030939A DE102004030939A1 (de) 2003-08-14 2004-06-26 Aktuator einer Parkbremse
PCT/EP2004/007640 WO2005016715A2 (fr) 2003-08-14 2004-07-10 Actionneur pour un frein de stationnement

Publications (1)

Publication Number Publication Date
EP1654143A2 true EP1654143A2 (fr) 2006-05-10

Family

ID=34195745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04740903A Withdrawn EP1654143A2 (fr) 2003-08-14 2004-07-10 Actionneur pour un frein de stationnement

Country Status (3)

Country Link
US (1) US20060157308A1 (fr)
EP (1) EP1654143A2 (fr)
WO (1) WO2005016715A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005028513B4 (de) * 2005-06-17 2020-01-16 Sma Solar Technology Ag Verfahren zum Bestimmen einer Zusammenschaltungsart von mindestens zwei elektrischen Einrichtungen und System mit mehreren elektrischen Einrichtungen
IL180398A0 (en) * 2006-12-27 2007-10-31 Mag Eh Ltd An electromechanical parking brake
US9976614B2 (en) * 2013-11-27 2018-05-22 Kelsey-Hayes Company Ball nut assembly for an electromechanically actuable parking brake assembly of a brake assembly
CN104389925B (zh) * 2014-10-15 2017-04-05 天津英创汇智汽车技术有限公司 一种带有紧急释放功能的电子驻车制动装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726525B1 (fr) * 1994-11-03 1997-01-17 Rockwell Body & Chassis Syst Frein electrique de stationnement de vehicule automobile
DE19755933C1 (de) * 1997-12-17 1999-08-12 Kuester & Co Gmbh Feststellbremse für Fahrzeuge
JP4322348B2 (ja) * 1999-04-23 2009-08-26 株式会社ハイレックスコーポレーション 電動式のパーキングブレーキ操作装置
DE10035220B4 (de) * 2000-07-20 2014-01-23 Robert Bosch Gmbh Verfahren zum Betrieb einer Radbremsvorrichtung
JP3894733B2 (ja) * 2001-02-15 2007-03-22 本田技研工業株式会社 電動駐車ブレーキ装置
US6626270B2 (en) * 2001-12-21 2003-09-30 Delphi Technologies, Inc. Caliper with internal motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005016715A2 *

Also Published As

Publication number Publication date
US20060157308A1 (en) 2006-07-20
WO2005016715A3 (fr) 2005-05-26
WO2005016715A2 (fr) 2005-02-24

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