FR2725809A1 - Motor vehicle brake pedal with locking mechanism to act as parking brake - Google Patents

Motor vehicle brake pedal with locking mechanism to act as parking brake Download PDF

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Publication number
FR2725809A1
FR2725809A1 FR9412161A FR9412161A FR2725809A1 FR 2725809 A1 FR2725809 A1 FR 2725809A1 FR 9412161 A FR9412161 A FR 9412161A FR 9412161 A FR9412161 A FR 9412161A FR 2725809 A1 FR2725809 A1 FR 2725809A1
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FR
France
Prior art keywords
actuator
hub
pedal
spring
rod
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.)
Granted
Application number
FR9412161A
Other languages
French (fr)
Other versions
FR2725809B1 (en
Inventor
Franck Mencarelli
Gerard Rouviere
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR9412161A priority Critical patent/FR2725809A1/en
Publication of FR2725809A1 publication Critical patent/FR2725809A1/en
Application granted granted Critical
Publication of FR2725809B1 publication Critical patent/FR2725809B1/fr
Granted legal-status Critical Current

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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
    • 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
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/103—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices
    • B60T11/105—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices with brake locking after actuation, release of the brake by a different control device, e.g. gear lever
    • 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
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/045—Brake-action initiating means for personal initiation foot actuated with locking and release means, e.g. providing parking brake application
    • B60T7/047—Hand-actuated release means

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Control Devices (AREA)

Abstract

The brake pedal has the brake pedal arm mounted on a pivot, with a toothed segment (13) at the end opposite the pedal. The toothed segment meshes with a locking wheel (15). The locking wheel has a friction surface on its hub (16). A coil spring (20) is wound round the hub. One end of the spring is fixed (21a), while the other end is attached to an actuator (23). To lock the pedal the actuator displaces the end of the spring to tighten it round the hub of the locking wheel. The actuator is electrically operated, and moves linearly between two positions. An over-centre mechanism holds the mechanism in the locked position once the actuator has passed a threshold point. The actuator is controlled by a switch (25) mounted on the dashboard of the vehicle.

Description

PEDALE A DISPOSITIF D'IMMOBILISATION
L'invention concerne une pédale à dispositif d'immobilisation montée à rotation sur un axe.IMMOBILIZER PEDAL
The invention relates to a pedal with an immobilizing device rotatably mounted on an axis.

On sait qu'un inconvénient des freins de parking tient au fait qu'ils se desserrent brutalement lors de leur déclenchement. Il s'ensuit lors d'un démarrage en côte, que la plupart des véhicules sont soumis à un déplacement dangereux vers l'arrière.We know that a disadvantage of parking brakes is that they suddenly release when they are applied. As a result, when starting on a hill, most vehicles are subject to dangerous rearward movement.

La plupart des solutions proposées impliquent un mécanisme coûteux et compliqué.Most of the solutions proposed involve an expensive and complicated mechanism.

La publication FR-A-2693965 décrit une pédale qui actionne un maîtrecylindre par l'intermédiaire d'un servomoteur d'assistance. Un interrupteur sensible à la pente interdit dans certaines conditions le retour du servomoteur à sa position de repos en correspondance avec l'état desserré des freins.The publication FR-A-2693965 describes a pedal which actuates a master cylinder by means of an assistance servomotor. A slope-sensitive switch in certain conditions prevents the servomotor from returning to its rest position in correspondence with the released state of the brakes.

La publication FR-A-1524109 décrit un dispositif de coincement de la tige de commande du frein au moyen de billes ou de galets montés sur un basculeur manoeuvré par le conducteur du véhicule.The publication FR-A-1524109 describes a device for wedging the brake control rod by means of balls or rollers mounted on a rocker operated by the driver of the vehicle.

L'invention a pour objet une pédale à dispositif d'immobilisation dont le fonctionnement indépendant de la présence d'un quelconque dispositif d'assistance permet au choix - la commande conventionnelle simultanée des freins du véhicule avec
retour au repos de la pédale de freinage, - la mise en oeuvre d'un dispositif anti-recul avec maintien automatique
de la pédale en position active, - la neutralisation du dispositif anti-recul à l'aide d'un actionneur
commandé à distance.The subject of the invention is a pedal with an immobilizing device, the operation of which, independent of the presence of any assistance device, allows the choice - the simultaneous conventional control of the vehicle brakes with
return to rest of the brake pedal, - the implementation of an anti-reverse device with automatic maintenance
of the pedal in the active position, - neutralization of the anti-rollback device using an actuator
remote control.

Selon l'invention l'organe d'immobilisation est rigidement relié à un moyeu tournant sur lequel agit un moyen de blocage unidirectionnel placé sous la dépendance d'un actionneur asservi à un organe de commande à distancie.According to the invention, the immobilization member is rigidly connected to a rotating hub on which acts a unidirectional locking means placed under the dependence of an actuator slaved to a remote control member.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture d'un exemple de réalisation de la pédale en référence au dessin annexé dans lequel: - la figure 1 est une représentation schématique d'une pédale de frein en
position de repos à dispositif d'immobilisation conforme à l'invention, - la figure 2 est une représentation schématique de la pédale en position
de freinage dont le dispositif d'immobilisation est représenté en position
de blocage de la pédale, - la figure 3 est une vue en coupe de la pédale suivant la ligne III - III de
la figure 1.Other characteristics and advantages of the invention will appear on reading an exemplary embodiment of the pedal with reference to the appended drawing in which: - Figure 1 is a schematic representation of a brake pedal in
rest position with immobilizing device according to the invention, - Figure 2 is a schematic representation of the pedal in position
brakes, the immobilizer of which is shown in position
for blocking the pedal, - Figure 3 is a sectional view of the pedal along line III - III of
Figure 1.

La pédale de frein 1 est montée à rotation sur un axe 2 installé sur un support 3 monté sur une cloison 4 de la carrosserie d'un véhicule automobile. Sur la figure, la pédale 1 est représentée dans la position de repos correspondant à l'état desserré des freins.The brake pedal 1 is rotatably mounted on an axis 2 installed on a support 3 mounted on a partition 4 of the body of a motor vehicle. In the figure, the pedal 1 is shown in the rest position corresponding to the released state of the brakes.

Un ensemble servofrein 10 est relié à la pédale 1 par l'intermédiaire d'un axe 11 porté par une tige 12.A brake booster assembly 10 is connected to the pedal 1 via a pin 11 carried by a rod 12.

Une denture d'entraînement, rigidement reliée à la pédale 1 est constituée à titre d'exemple par un secteur denté 13 porté par la tête 14 de la pédale.A drive toothing, rigidly connected to the pedal 1 is constituted by way of example by a toothed sector 13 carried by the head 14 of the pedal.

Le secteur denté 13 est en prise avec un pignon d'immobilisation 15. Le pignon 15 est rigidement relié à un moyeu tournant 16 porté par un axe 17 installé sur le support 3.The toothed sector 13 is engaged with an immobilizing pinion 15. The pinion 15 is rigidly connected to a rotating hub 16 carried by a pin 17 installed on the support 3.

Un ressort de blocage 20 est constitué par une succession de spires de friction à section polygonale enroulé autour du moyeu 16.A locking spring 20 is constituted by a succession of friction turns of polygonal section wound around the hub 16.

Sans sortir du cadre de l'invention, il est évident que l'élément de friction 20 peut être monté tout aussi bien sur un moyeu rigidement lié à la pédale 1 disposé concentriquement à l'axe 2 de la pédale. Without departing from the scope of the invention, it is obvious that the friction element 20 can be mounted just as well on a hub rigidly connected to the pedal 1 disposed concentrically with the axis 2 of the pedal.

Les extrémités libres 21a, 21b du ressort 20 sont respectivement solidaires du support 3 et de la tige de commande 22 d'un actionneur 23 asservi à un contacteur de commande 25 monté par exemple sur le tableau de bord 26 du véhicule.The free ends 21a, 21b of the spring 20 are respectively secured to the support 3 and the control rod 22 of an actuator 23 controlled by a control switch 25 mounted for example on the dashboard 26 of the vehicle.

L'actionneur 23 peut être constitué à titre d'exemple, par un électroaimant plongeur dont la bobine fixe est alimentée à partir du contacteur 25, dans le but de commander à l'arrêt du véhicule et à partir d'une impulsion électrique, l'actionneur 23 qui engendre le couple moteur nécessaire à la réalisation de l'accouplement entre le ressort 20 et le moyeu 16 du pignon 15.The actuator 23 can be constituted, for example, by a plunger electromagnet, the fixed coil of which is supplied from the contactor 25, in order to control when the vehicle is stopped and from an electric pulse, l actuator 23 which generates the motor torque necessary for the coupling between the spring 20 and the hub 16 of the pinion 15.

Par contre dès que le véhicule est en mouvement, l'alimentation de l'actionneur est interrompue par l'intermédiaire d'un bloc de commande logique 29 sensible à un signal représentatif de la vitesse V du véhicule et l'effet de serrage du ressort 20 est neutralisé.On the other hand, as soon as the vehicle is in motion, the power supply to the actuator is interrupted by means of a logic control unit 29 sensitive to a signal representative of the speed V of the vehicle and the spring tightening effect. 20 is neutralized.

Le bloc logique 29 interrompt également le circuit d'alimentation de l'actionneur pour empêcher une action inappropriée sur le contacteur 25.The logic block 29 also interrupts the actuator supply circuit to prevent inappropriate action on the contactor 25.

Dans ces conditions l'actionneur 23 peut être alimenté par le contacteur 25 à l'arrêt du véhicule contrôlé par le bloc de commande logique 29 pour déplacer la tige de commande 22 et l'extrémité 21b du ressort 20 R a) Dans le sens d'un blocage du moyeu 16 par une contrainte radiale de
serrage du moyeu 16 du pignon 15 à la suite d'un enfoncement
préalable de la pédale 1.Under these conditions, the actuator 23 can be powered by the contactor 25 when the vehicle is stopped, controlled by the logic control unit 29 to move the control rod 22 and the end 21b of the spring 20 R a) In the direction d '' a blocking of the hub 16 by a radial stress of
tightening of the hub 16 of the pinion 15 following a depression
pedal first 1.

b) Dans le sens d'un déblocage du moyeu 16 par une impulsion sur le
contacteur 25 qui déplace la tige 22 et supprime la contrainte radiale
de serrage et d'immobilisation du moyeu 16.b) In the direction of release of the hub 16 by an impulse on the
contactor 25 which moves the rod 22 and removes the radial stress
clamping and immobilizing the hub 16.

Dans le but de permettre la commande impulsionnelle du dispositif d'immobilisation de la pédale, la tige de commande 22 possède deux positions limites représentées aux figures 1 et 2 en correspondance avec l'état desserré et serré des freins, on prévoit l'application d'un ressort auxiliaire d'assistance 30 et de maintien de la tige dans ses positions limites. In order to allow impulse control of the pedal immobilization device, the control rod 22 has two limit positions shown in Figures 1 and 2 in correspondence with the released and applied state of the brakes, the application of 'An auxiliary assistance spring 30 and holding the rod in its limit positions.

Le ressort 30 est un ressort de franchissement de point mort monté en compression entre un ancrage sur le support 3 et un ancrage sur la tige 22.The spring 30 is a neutral point crossing spring mounted in compression between an anchoring on the support 3 and an anchoring on the rod 22.

Le ressort 30 exerce alors dans la position de serrage du moyeu 16, une force dirigée selon le premier sens d'actionnement de la tige 22 à partir du contacteur 25 de commande à distance, fixé sur la planche de bord du véhicule.The spring 30 then exerts in the clamping position of the hub 16, a force directed in the first direction of actuation of the rod 22 from the remote control switch 25, fixed to the dashboard of the vehicle.

Le ressort 30 exerce par contre dans la position de desserrage du moyeu 16, une force dirigée selon le deuxième sens d'actionnement de la tige 22, à partir du même contacteur 25. The spring 30, on the other hand, exerts in the loosening position of the hub 16, a force directed in the second direction of actuation of the rod 22, from the same contactor 25.

Claims (4)

REVENDICATIONS 1) Pédale à dispositif d'immobilisation, montée à rotation sur un axe et1) Pedal with immobilizer, rotatably mounted on an axle and dans lequel un organe de commande agit sur ledit dispositif, in which a control member acts on said device, constitué par une denture (13) d'entraînement actionnée par la pédale consisting of a toothing (13) driven by a pedal en prise avec la denture d'un organe d'immobilisation (15), in engagement with the teeth of an immobilizing member (15), caractérisée par le fait que l'organe d'immobilisation (15) est characterized by the fact that the immobilizing member (15) is rigidement relié à un moyeu tournant (16) sur lequel agit un moyen rigidly connected to a rotating hub (16) on which a means acts de blocage unidirectionnel (20) placé sous la dépendance d'un unidirectional blocking device (20) placed under the dependence of a actionneur (23) asservi audit organe de commande (25). actuator (23) slaved to said control member (25). 2) Pédale selon la revendication 1, caractérisée par le fait que2) Pedal according to claim 1, characterized in that l'actionneur (23) du moyeu (16) de l'organe d'immobilisation (15) the actuator (23) of the hub (16) of the immobilizing member (15) sont raccordés par un élément de friction qui réagit au couple moteur are connected by a friction element which reacts to the motor torque communiqué par l'actionneur (23), en s'accouplant au moyeu (16) communicated by the actuator (23), by coupling to the hub (16) dudit organe d'immobilisation (15). said immobilizing member (15). 3) Pédale selon la revendication 2, caractérisée par le fait que l'élément3) Pedal according to claim 2, characterized in that the element de friction est constitué par un ressort à spires soumises par friction consists of a coil spring subjected by l'actionneur (23) à une contrainte radiale de serrage du moyeu (16) the actuator (23) to a radial clamping stress of the hub (16) de l'organe d'immobilisation (15) et dans laquelle une extrémité of the immobilizing member (15) and in which one end dudit ressort est immobilisée par le support (3) de la pédale of said spring is immobilized by the support (3) of the pedal tandisque l'autre extrémité est soumise à l'effort de l'actionneur (23).  while the other end is subjected to the force of the actuator (23). 4) Pédale selon la revendication 3, caractérisée par le fait que4) Pedal according to claim 3, characterized in that l'actionneur (23) porte une tige de commande (22) à deux positions the actuator (23) carries a two-position control rod (22) limites correspondant au serrage et au desserrage du moyeu (16) de limits corresponding to the tightening and loosening of the hub (16) of l'organe d'immobilisation par le ressort à spires, sur laquelle est the immobilization member by the coil spring, on which is accroché un ressort de franchissement de point mort (30), qui dans la hooked a neutral crossing spring (30), which in the position de serrage du moyeu (16), exerce une force dirigée dans le clamping position of the hub (16), exerts a force directed into the premier sens d'actionnement de ladite tige (22) par un contacteur first direction of actuation of said rod (22) by a contactor (26) de commande à distance de l'actionneur (23) et qui dans la (26) remote control of the actuator (23) and which in the position de desserrage du moyeu (16) exerce une force dirigée dans hub release position (16) exerts a directed force in le sens opposé d'actionnement de cette même tige (22) par ledit the opposite direction of actuation of the same rod (22) by said contacteur (26).  contactor (26).
FR9412161A 1994-10-12 1994-10-12 Motor vehicle brake pedal with locking mechanism to act as parking brake Granted FR2725809A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9412161A FR2725809A1 (en) 1994-10-12 1994-10-12 Motor vehicle brake pedal with locking mechanism to act as parking brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9412161A FR2725809A1 (en) 1994-10-12 1994-10-12 Motor vehicle brake pedal with locking mechanism to act as parking brake

Publications (2)

Publication Number Publication Date
FR2725809A1 true FR2725809A1 (en) 1996-04-19
FR2725809B1 FR2725809B1 (en) 1997-02-07

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FR9412161A Granted FR2725809A1 (en) 1994-10-12 1994-10-12 Motor vehicle brake pedal with locking mechanism to act as parking brake

Country Status (1)

Country Link
FR (1) FR2725809A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1433680A2 (en) * 1999-03-02 2004-06-30 Textron Inc. Suspended pedal system for golf cars
US7389859B2 (en) 1999-03-02 2008-06-24 Textron Inc. Golf car having disk brakes and single point latching brake

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105438377B (en) * 2015-12-05 2018-06-26 冯仓武 A kind of pedal braking device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333512A (en) * 1965-07-28 1967-08-01 Universal American Corp Fluid pressure actuated servo-motor
GB2011563A (en) * 1977-12-29 1979-07-11 Rau Swf Autozubehoer Brake power assistance
FR2525978A1 (en) * 1982-04-29 1983-11-04 Gen Motors Corp DEVICE FOR CONTROLLING ROAD BRAKES AND PARKING BRAKES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333512A (en) * 1965-07-28 1967-08-01 Universal American Corp Fluid pressure actuated servo-motor
GB2011563A (en) * 1977-12-29 1979-07-11 Rau Swf Autozubehoer Brake power assistance
FR2525978A1 (en) * 1982-04-29 1983-11-04 Gen Motors Corp DEVICE FOR CONTROLLING ROAD BRAKES AND PARKING BRAKES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1433680A2 (en) * 1999-03-02 2004-06-30 Textron Inc. Suspended pedal system for golf cars
EP1433680A3 (en) * 1999-03-02 2005-04-20 Textron Inc. Suspended pedal system for golf cars
US7389859B2 (en) 1999-03-02 2008-06-24 Textron Inc. Golf car having disk brakes and single point latching brake

Also Published As

Publication number Publication date
FR2725809B1 (en) 1997-02-07

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Effective date: 20070629