EP1198373A1 - Dispositif de commande pour un frein de stationnement - Google Patents

Dispositif de commande pour un frein de stationnement

Info

Publication number
EP1198373A1
EP1198373A1 EP00958215A EP00958215A EP1198373A1 EP 1198373 A1 EP1198373 A1 EP 1198373A1 EP 00958215 A EP00958215 A EP 00958215A EP 00958215 A EP00958215 A EP 00958215A EP 1198373 A1 EP1198373 A1 EP 1198373A1
Authority
EP
European Patent Office
Prior art keywords
brake
lever
pawl
actuating device
linkage
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Withdrawn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
EP00958215A
Other languages
German (de)
English (en)
Inventor
Ulf Braker
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.)
Edscha AG
Original Assignee
Edscha AG
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 Edscha AG filed Critical Edscha AG
Publication of EP1198373A1 publication Critical patent/EP1198373A1/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Withdrawn legal-status Critical Current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
    • 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
    • B60T7/102—Disposition of hand control by means of a tilting lever
    • B60T7/104—Disposition of hand control by means of a tilting lever with a locking mechanism
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/12—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in an indefinite number of positions, e.g. by a toothed quadrant

Definitions

  • the invention relates to an actuating device according to the preamble of claim 1 for a parking brake in motor vehicles, comprising a toothed segment arranged on a bridge support of the vehicle body, a brake actuation lever articulated on the bridge support, a coupling unit which tensions a brake cable according to the displacement of the brake actuation lever, one on the Brake actuating lever articulated and interacting with the toothed segment locking pawl, a pawl spring for biasing the locking pawl in the direction of the toothed segment and a linkage that can be actuated along the brake operating lever.
  • Actuators for parking brakes of motor vehicles are known in practice, in which a push rod articulated to the locking pawl, which is used to actuate a push button arranged at the front end of the brake operating lever in an axially displaceable manner to release the locking pawl, interacts.
  • the spring acting on the push rod is at the same time the prestressed element which brings the locking pawl into engagement with a toothing arranged on the vehicle body.
  • the spring preload is selected to be significantly higher than required to secure the locking pawl against the teeth, but this has the consequence that the locking and also the locking of the locking pawl is accompanied by significant noise ,
  • EP-A-0 351 131 describes a self-adjusting manual parking brake in which a one-piece locking pawl for the engaged state of the Handbrake and another one-piece pawl for adjusting the cable are articulated on a handbrake lever on the same shaft, the locking pawl being biased by a spring in the engaged position with a toothed surface of the bridge girder fixed to the vehicle body and at its end facing away from the toothed surface with an in the hand brake lever integrated spring-loaded actuating linkage is connected, the actuation of a button on the hand brake lever on the actuating linkage allows the locking pawl to disengage from the toothed surface.
  • GB-A-2 059 022 describes a foot parking brake which fixes the cable of the brake via a foot brake lever which can be pivoted relative to a bridge support fixed to the vehicle body and with a toothed surface, with a pedal articulated thereon, in that a pawl articulated on the foot brake lever with the toothed Surface for locking the tightened brake cable comes into engagement, wherein to actuate the pawl in the direction of releasing the engagement, it is actuated at its end facing away from the toothed surface via a lever articulated at this end, the lever facing away from the linkage to the pawl End is pivotally connected to a rod mounted on the pedal and is further held by a spring against the direction of actuation of the pedal such that the pawl only with a simultaneous tilting movement in the direction of the release of the pawl, which actuates the rod, and one in the direction the lock g the pawl pushing movement of the pedal, which actuates the foot brake lever, can be disengaged from the toothed
  • EP-A-0 771 706 describes a hand parking brake for motor vehicles, in which a locking pawl articulated on the brake actuating lever is constructed in two parts such that a restoring movement occurring when the toothing slides over a decoupling part decouples from the first second pawl part, which is articulated to an actuatable linkage, can take place while actuation of the linkage via driver lugs allows the first pawl part to come out of engagement with the toothing.
  • a leg spring is provided, which acts on the first pawl part in the direction of the engagement with a toothing fixed to the vehicle body, the solution as a whole being complex and cumbersome with regard to assembly and the variety of parts, in particular the moving parts.
  • DE-A-195 38 108 describes a braking device in which one with a
  • Handbrake lever connected rack cooperates with a pawl designed as a double lever for locking a brake cable
  • a U-shaped leaf spring is provided on the lever facing the rack of the pawl, the legs of which encompass the boundary surfaces of the rack laterally and generate a frictional force at the ends, which at Tensioning the brake increases the force of a spring acting on the other, shorter lever.
  • a rod for releasing the brake which is also displaced by the movements of the pawl, also articulates on the short lever.
  • a disadvantage of this parking brake is in particular the fact that the U-shaped leaf spring tends to wear due to the friction it generates, so that the corresponding braking force changes over time. In addition, the spring may become blocked due to contamination or the like, as a result of which the braking device as a whole would be put out of operation.
  • the leaf spring in particular requires a large variety of parts.
  • GB-A-1 428 230 describes a servo-assisted hand-operated parking brake which has servo assistance by means of a hydraulic brake assistance unit.
  • a pawl designed as a double lever engages with its engaging tooth in a toothed segment of an escapement wheel, a compression spring for fixing the pawl to the toothed segment facing lever of the pawl.
  • a push rod integrated in the brake actuation lever is actuated, the front end of which is slidably held in a longitudinal guide and the rear end of which has an elongated hole which permits displacement relative to the pivot pin on which the brake actuation lever is mounted.
  • An intermediate double lever is actuated with the rounded aft end of the push rod, the end facing the push rod is in contact with the rounded front end of the push rod, while a distance remains between the end of the intermediate double lever facing the latch and the lever of the latch facing away from the tooth segment. to allow the pawl to move over the teeth of the toothed segment when the brake actuation lever is tightened. Since the compression spring acts on the lever of the pawl facing the toothed segment, it has to be designed with a high spring force, as a result of which the latching or ratcheting noise when the brake actuation lever is tightened is clearly audible.
  • the pawl spring is designed as a compression spring and acts on an end facing away from the toothed segment of the locking pawl designed as a one-piece double lever, and that the linkage only in Actuated the fixed part pawl against the idea of the pawl spring out of engagement with the toothed segment.
  • the actuating device according to the invention reduces the actuating force on the locking pawl, as a result of which the noise development when the brake actuating lever is applied can be set as a function of the spring force of the compression spring and is correspondingly reduced.
  • the noisy engagement of the engaging tooth which is perceived as uncomfortable by conventional parking brakes as an exaggeratedly loud reference to the mechanics, is also reduced when using inexpensive components for the actuating device in such a way that separate noise insulation is not required.
  • the design of the actuating device according to the invention means that when the locking pawl is pivoted in one piece, the linkage does not move due to the decoupling from the linkage, as a result of which vibration or an optically perceptible movement of a push button arranged at the end is prevented and the overall impression of quiet mechanical properties of the actuating device is conveyed to the driver.
  • the engagement of the locking pawl is at the same time implemented in a particularly functionally reliable and cost-effective manner, wherein in addition the assembly of the actuating device is made possible by the simple means for introducing a compression spring against an end of the housing which serves as an abutment for the compression spring. It is also possible to limit the relaxation of the compression spring by a stop for the compression spring or by a stop for the locking pawl, which on the one hand a defined minimum distance between the end of the linkage on the one hand and a stop point of the locking pawl on the other hand can be maintained, which is available as an idle path when the linkage is actuated.
  • the locking pawl on a short lever facing the toothing is equipped with an engagement lug, which can not necessarily be arranged in an extension of the lever, but also laterally cantilevered, which is intended to come into engagement with the toothing, so that when the Brake actuating lever is fixed in its tightened position at an angle to the relaxed position.
  • the locking pawl preferably has on its long lever facing away from the toothing a stop point against which the end of the linkage only strikes when it has been actuated to a certain extent, the end of the linkage coming out of contact with the stop point by releasing the actuation, so that the Locking pawl only engages with the toothing under the influence of the pawl spring.
  • the stop point is expediently arranged on the side of the long lever of the locking pawl which faces away from the pawl spring, so that the spring forces of the pawl spring on the one hand and the compression rod spring on the other hand are directed essentially in the same direction when the linkage is actuated and thus essentially by taking them into account of the sign for the orientation can be taken into account additively for the design.
  • the linkage expediently in the vicinity of the stop point and essentially at the inward end of the linkage, is equipped in the brake actuation lever with an axial guide along the brake actuation lever, so that the pushing motion of the linkage in the event of the pushbutton being actuated axially in the direction of the locking pawl , preferably to an attachment point provided thereon.
  • the guide is preferably formed by an elongated hole provided in the region of the end of the linkage, in which a pin engages, the slot being preferably integrated in the linkage and the pin being fixedly arranged on the brake actuation lever.
  • the long axis of the elongated hole, which essentially coincides with the direction of impact of the linkage, and the main axis of the pawl spring are arranged essentially parallel, whereby the two axes can be arranged laterally offset from one another.
  • the pawl spring will attack the end of the lever of the locking pawl, so that a relatively long spring travel for the pivoting of the locking pawl is covered when engaging in the toothing, whereby the snap-in noise is less pronounced.
  • the locking pawl is expediently inexpensive to manufacture as a pressed sheet metal part.
  • the actuating device expediently also has an adjusting device for the coupling unit, which adjusts the
  • the adjusting device preferably comprises a spring load in the direction of tightening of the brake cable and, by means of a circumferential toothing and a drive pawl designed as a rocker arm, which can be reversed as a function of the tightening path of the hand brake lever, a rope pulley which can be coupled to the brake actuation lever and which by the spring load in each case when the parking brake is released ensures tight condition of the brake cable.
  • the actuating device according to the invention for a parking brake can be provided equally in foot parking brakes and in hand parking brakes.
  • the linkage and the locking pawl can even be made in one piece.
  • the displacement of the locking pawl relative to the linkage for the latching movements can be designed free of positive locking, so that there is no entrainment of the linkage when the pawl is pivoted when it is displaced on the toothed segment by tightening the brake actuation lever.
  • only the force of the pawl spring has to be overcome, which is accompanied by low noise.
  • the two parts are at least positively coupled in such a way that when the linkage is moved against the pawl spring (and the further compression spring arranged in the handle by actuating the push button), the locking pawl is taken along, which thereby releases the locking position.
  • the linkage and the locking pawl are coupled via an elongated hole in one of the two parts and a pin arranged in the other of the two parts and engaging in the elongated hole in such a way that a pivoting movement of the locking pawl against the pretension of the pawl spring can be carried out without moving the linkage.
  • the elongated hole can advantageously have a curvature corresponding to the pivot radius of the pin.
  • FIG. 1 shows a partially sectioned representation of an embodiment of a parking brake according to the invention in the stored position.
  • FIG. 2 shows the parking brake from FIG. 1 while the brake actuation lever is being applied.
  • Fig. 3 shows the parking brake of Fig. 1 and 2 when the
  • the handbrake 1 shown in detail in FIG. 1 has a bridge support 2 which is arranged in a rotationally fixed manner with the vehicle body and to which a brake actuation lever 4 is pivotably articulated via a joint 3.
  • the bridge girder 2 has a circumferential toothing 5 via a circular arc section, which is arranged on a circular arc segment whose center of the circle coincides with the joint 3.
  • a pawl 7 is pivotally arranged via a joint 6, which pawl 5 faces a short one Lever 7a and a long lever 7b facing away from the toothing 5.
  • An engagement lug 8 is formed on the front of the short lever 7a and is intended to engage the teeth of the teeth 5 when the handbrake 1 is applied in order to secure the position of the handbrake 1.
  • the engagement lug 8 rests in an area 9 which is provided in the extension of the toothed segment and is lowered in relation to an engagement position.
  • a projection 10 is formed on the side facing the support bracket 2, on which a compression spring 11 designed as a spiral spring engages.
  • the compression spring 1 1 is fixed in place on the brake operating lever 4 in a housing-like receptacle 12, and biases the locking pawl 7 in the direction of engagement.
  • a stop point 13 is provided which protrudes relative to the contour of the lever 7b and has an outer contour which indicates a semicircle.
  • the brake actuating lever 4 also has a linkage 14 which comprises a push rod 15 which is arranged to be displaceable essentially axially within the brake actuating lever 4 by a spring element (not shown) when a pushbutton (not shown) arranged on the end of the hand brake lever 4 is actuated.
  • the aft end of the push rod 15 comprises an axial guide 16 which is designed as an elongated hole 17 arranged in the end region of the push rod 15, which elongated hole 17 sits on a pin 18 and thus essentially defines the axial actuation path of the push rod 15.
  • the end surface 19 delimiting the push rod 15 aft of the guide 16 has a slight gap 20 to the stop point 13 of the locking pawl 7 in the rest position of the locking pawl 7, in which the engaging nose 8 rests in the tray 9.
  • a stop In order to prevent a positive contact of the stop point 13 of the locking pawl 7 with the end side 19 of the push rod 15 and to always keep a gap 20 ready which, when the linkage 14 is actuated by overcoming the gap, creates a short idle travel, it is provided that the maximum spring travel of the spring 11 is limited by a stop.
  • This stop can be arranged either in the area of the spring travel itself or in the area of the locking pawl 7, it also being possible to provide the travel limitation through the rest area 9 for the short lever 7a.
  • the coupling unit with which the Bremsseii is coupled to the brake actuation lever, can include both a direct transmission of the force and a force support device and is particularly expediently designed to be self-adjusting in such a way that a voltage is transmitted to the brake cable even when the brake actuation lever is applied.
  • Such self-adjusting coupling units are known and are therefore not dealt with in more detail.
  • the spring 11 is dimensioned to such an extent that, however, at the end of the pivoting movement 21 the locking pawl 7 due to the action prints the long lever 7b with the engaging lug 8 into the valley between two teeth of the toothing 5 and thus locks the brake actuating lever 4 in an angular position relative to the bridge girder 2 and its toothing 5.
  • the spring 11 is shown in the compressed state and can be seen that the gap 20 between the end te 19 and the stop 13 has increased accordingly.
  • the push rod is moved by actuating the push button arranged on the end face due to a strong compression spring and, with its end side 19 abutting against the stop point 13, the pawl 7 is displaced around the joint 6 against the force of the compression spring 11 so that the pin 18 is arranged in the slot 17 near the front end of the slot 17 Due to this positive connection between the push rod 15 and locking pawl 7 arrives
  • the engagement nose 8 is out of engagement with the toothing 5 (or with the rest position 9 if the push button is actuated when the handbrake 1 is removed) and the handbrake lever can be put down when the handbrake is applied as is customary in the prior art.
  • the end side 19 of the push rod 15 always defines a contact line when the stop point 13 is touched, which enables the stop point 13 to slide over the end side 19 and thus prevents jamming or jamming. If the push button is released, the push rod 15 comes back into it Position shown in Fig. 1, and the locking pawl 7 comes back due to the bias of the spring 1 1 with the circumference of the bridge girder 2, in the stored position in the rest position 9, and with the hand brake with the teeth 5th
  • the invention has been explained above on the basis of an exemplary embodiment in which the elongated hole 17 arranged in the push rod 15 can be displaced relative to a pin 18 which is fastened to the brake actuation lever 4.
  • the pin 18 also to be arranged on the locking pawl 7 in such a way that there is no positive connection between the two parts, but only in the case of actuation that the locking pawl 7 is entrained by the linkage 14

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Elements And Transmission Devices (AREA)
  • Braking Arrangements (AREA)
  • Mechanical Control Devices (AREA)

Abstract

L'invention concerne un dispositif de commande pour un frein de stationnement pour véhicule à moteur, comprenant un secteur denté (5) monté sur un longeron (2) de la carrosserie du véhicule, un levier de commande du frein (4) articulé sur le longeron (2), un bloc d'accouplement exerçant une tension sur le câble de frein, en fonction des déplacements du levier de commande (4), un cliquet d'arrêt (7) articulé sur le levier de commande (4) et coopérant avec le secteur denté (5), un ressort de cliquet (11) pour la pré-tension du cliquet d'arrêt (7) en direction du secteur denté (5), et une tringlerie (14) pouvant être actionnée le long du levier de commande (4). L'invention a pour but de fournir un dispositif de commande permettant d'obtenir, avec des moyens simples, une réduction du bruit satisfaisante lorsqu'on tire le frein de stationnement. Ce but est atteint, conformément à l'invention, laquelle est caractérisée en ce que le ressort de cliquet (7) est réalisé sous la forme d'un ressort de compression et est en prise avec une extrémité, opposée au secteur denté (5), dudit cliquet d'arrêt (7) réalisé sous la forme d'un levier double monobloc, et en ce que la tringlerie (14) déplace, lors de la commande, tout d'abord le cliquet d'arrêt (7), à l'encontre la pré-tension du ressort de cliquet (11), hors de la prise avec le secteur denté (5).
EP00958215A 1999-08-06 2000-08-02 Dispositif de commande pour un frein de stationnement Withdrawn EP1198373A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1999136733 DE19936733C2 (de) 1999-08-06 1999-08-06 Betätigungseinrichtung für eine Feststellbremse
DE19936733 1999-08-06
PCT/DE2000/002590 WO2001010688A1 (fr) 1999-08-06 2000-08-02 Dispositif de commande pour un frein de stationnement

Publications (1)

Publication Number Publication Date
EP1198373A1 true EP1198373A1 (fr) 2002-04-24

Family

ID=7917182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00958215A Withdrawn EP1198373A1 (fr) 1999-08-06 2000-08-02 Dispositif de commande pour un frein de stationnement

Country Status (7)

Country Link
EP (1) EP1198373A1 (fr)
JP (1) JP2003506258A (fr)
CN (1) CN1368921A (fr)
AU (1) AU6982600A (fr)
BR (1) BR0012902A (fr)
DE (2) DE19936733C2 (fr)
WO (1) WO2001010688A1 (fr)

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DE20210489U1 (de) * 2002-07-06 2002-11-21 Dietz Automotive Gmbh & Co Kg Betätigungsvorrichtung für eine Feststellbremse
DE10236593A1 (de) * 2002-08-09 2004-03-04 Audi Ag Feststellbremse eines Kraftfahrzeuges
DE10315233B4 (de) * 2003-04-03 2007-06-14 Fico Cables, S.A. Handbremshebeleinheit
ES2265240B1 (es) 2004-10-22 2008-01-01 Batz, S.Coop Conjunto de accionamiento de freno de estacionamiento con dispositivo de reduccion de ruido.
DE102005013475B4 (de) * 2005-03-23 2010-01-07 Dietz-Automotive Gmbh & Co. Kg Betätigungsvorrichtung für eine Feststellbremse
JP4519740B2 (ja) * 2005-08-31 2010-08-04 本田技研工業株式会社 パーキングブレーキ装置
JP4486011B2 (ja) * 2005-08-31 2010-06-23 本田技研工業株式会社 パーキングブレーキ装置
JP4579279B2 (ja) * 2006-11-15 2010-11-10 トヨタ自動車株式会社 ペダル操作量検出装置
DE102007021831A1 (de) * 2007-05-07 2008-11-13 Zf Friedrichshafen Ag Bedienvorrichtung für ein Fahrzeug mit automatisiertem Getriebe und einem elektrisch betätigten Parkbremssystem
KR100829310B1 (ko) * 2007-05-15 2008-05-13 현대자동차주식회사 차량의 주차 브레이크장치
DE202007017096U1 (de) * 2007-12-05 2008-02-14 Edscha Ag Kraftfahrzeug-Feststellbremse
DE202009013243U1 (de) * 2009-10-02 2009-12-10 Dietz-Automotive Gmbh & Co. Kg Betätigungsvorrichtung für eine Feststellbremse
DE102011018507A1 (de) * 2011-04-23 2012-10-25 Power-Cast Light Metal Solutions Gmbh & Co. Kg Betätigungsvorrichtung für eine Feststellbremse
DE102018118305A1 (de) * 2018-07-27 2020-01-30 Stopfix Bremse Schröter & Co. GmbH Vorrichtung und Verfahren zur Betätigung einer Feststellbremse
CN109144166A (zh) * 2018-10-10 2019-01-04 浙江省能源集团有限公司 用于工程车辆驾驶室内操纵杆的控制系统

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JPS5647339A (en) * 1979-09-20 1981-04-30 Nissan Motor Co Ltd Pedal type parking brake device
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FR2675103B1 (fr) * 1991-04-15 1993-08-06 Rockwell Abs France Frein a main pour vehicule.
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Also Published As

Publication number Publication date
JP2003506258A (ja) 2003-02-18
DE10082274D2 (de) 2001-11-08
AU6982600A (en) 2001-03-05
DE19936733C2 (de) 2001-06-13
WO2001010688A1 (fr) 2001-02-15
CN1368921A (zh) 2002-09-11
DE19936733A1 (de) 2001-03-01
BR0012902A (pt) 2002-04-16

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