FR2657664A1 - Wedge mechanism for a brake - Google Patents

Wedge mechanism for a brake Download PDF

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Publication number
FR2657664A1
FR2657664A1 FR9001120A FR9001120A FR2657664A1 FR 2657664 A1 FR2657664 A1 FR 2657664A1 FR 9001120 A FR9001120 A FR 9001120A FR 9001120 A FR9001120 A FR 9001120A FR 2657664 A1 FR2657664 A1 FR 2657664A1
Authority
FR
France
Prior art keywords
guide element
assembly
pusher
wedge
corner
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
FR9001120A
Other languages
French (fr)
Other versions
FR2657664B1 (en
Inventor
Fabbro Edgar
Laurent Jacques
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.)
Bendix Europe Services Techniques SA
Original Assignee
Bendix Europe Services Techniques SA
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 Bendix Europe Services Techniques SA filed Critical Bendix Europe Services Techniques SA
Priority to FR9001120A priority Critical patent/FR2657664A1/en
Publication of FR2657664A1 publication Critical patent/FR2657664A1/en
Application granted granted Critical
Publication of FR2657664B1 publication Critical patent/FR2657664B1/fr
Granted legal-status Critical Current

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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
    • F16D65/22—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for pressing members apart, e.g. for drum brakes
    • 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
    • F16D2125/66—Wedges

Abstract

The invention relates to a wedge mechanism for actuating a brake, including a substantially cylindrical hollow body (1) in which is enclosed a wedge-roller cage assembly (3, 5, 7) controlled by a push rod (15) projecting from the body via the opposite end from the wedge (7). According to the invention, this assembly (3, 5, 7) is separated from the push rod (15) by means of a guide element (11) sliding in the body (1), the push rod (15) and the assembly (3, 5, 7) each including a ball joint (17, 19; 9, 13) for connection to the guide element (11).

Description

MECANISME A COIN POUR FREIN
La présente invention concerne le domaine des freins généralement utilisés sur les véhicules automobiles dits poids lourds pour actionner les freins, que ceux-ci soient du type à disque ou du type à tambour.CORNER MECHANISM FOR BRAKE
The present invention relates to the field of brakes generally used on so-called heavy-duty motor vehicles for actuating the brakes, whether these are of the disc type or of the drum type.

Le document EP-A-O 161 119 décrit notamment un tel mécanisme à coin. On sait qu'il est nécessaire que le coin puisse effectuer de petits débattement angulaires autour de sa position moyenne. Document EP-A-O 161 119 describes in particular such a wedge mechanism. We know that it is necessary for the wedge to be able to make small angular deflections around its average position.

Dans ce but, l'ensemble comprenant le coin et la cage à galets est fixé au poussoir du mécanisme au moyen d'une articulation à rotule de manière à préserver cette liberté de débattement tout en évitant que la force de poussée exercée par le poussoir fasse un angle important avec la force reçue par le coin.For this purpose, the assembly comprising the wedge and the roller cage is fixed to the pusher of the mechanism by means of a ball joint so as to preserve this freedom of movement while preventing the pushing force exerted by the pusher an important angle with the force received by the corner.

Il est alors nécessaire d'assurer un guidage du poussoir de manière à ce qu'il coulisse strictement dans un axe déterminé. It is then necessary to ensure guiding of the pusher so that it slides strictly in a determined axis.

Toutefois, les jeux inhérents à l'organe de commande rendent souvent délicat le maintien du poussoir dans cet axe ; en outre, il peut être souhaitable de disposer l'organe de commande en un autre lieu ce qui rend critique tout mouvement angulaire relatif entre le poussoir et cet axe. However, the games inherent in the control member often make it difficult to maintain the pusher in this axis; in addition, it may be desirable to have the control member at another location, which makes any relative angular movement between the pusher and this axis critical.

La présente invention a pour but d'obvier à cet inconvénient. The object of the present invention is to obviate this drawback.

L'invention concerne donc un mécanisme à coin pour actionnement d'un frein, comportant un corps creux sensiblement cylindrique dans lequel est enfermé un ensemble cage à galets-coin commandé par un poussoir faisant saillie du corps par l'extrémité opposée au coin. The invention therefore relates to a wedge mechanism for actuating a brake, comprising a substantially cylindrical hollow body in which is enclosed a roller cage-wedge assembly controlled by a pusher projecting from the body by the end opposite the wedge.

Selon l'invention, l'ensemble est séparé du poussoir au moyen d'un élément de guidage coulissant dans le corps, le poussoir et l'ensemble comportant chacun une liaison à rotule avec l'élément de guidage. According to the invention, the assembly is separated from the pusher by means of a guide element sliding in the body, the pusher and the assembly each comprising a ball joint with the guide element.

De préférence, l'élément de guidage comporte une jupe coopérant avec la paroi interne du corps. Preferably, the guide element comprises a skirt cooperating with the internal wall of the body.

De préférence également, une coupelle est solidaire de l'ensemble, un ressort de rappel étant disposé entre la jupe et la coupelle pour assurer un contact permanent entre l'élément de guidage et l'ensemble. Also preferably, a cup is integral with the assembly, a return spring being disposed between the skirt and the cup to ensure permanent contact between the guide element and the assembly.

L'invention sera mieux comprise et d'autres buts, avantages et caractéristiques de celle-ci apparaîtront plus clairement à la lecture de la description qui suit d'un mode de réalisation donné à titre non limitatif et à laquelle une planche de dessin est annexée sur laquelle
- la Figure unique représente schématiquement en coupe partielle un mécanisme à coin selon l'invention.The invention will be better understood and other objects, advantages and characteristics thereof will appear more clearly on reading the following description of an embodiment given without limitation and to which a drawing board is appended on which
- The single figure shows schematically in partial section a wedge mechanism according to the invention.

En référence maintenant à la Figure, le mécanisme comprend un corps creux cylindrique 1 enfermant les galets 3, la cage à galets 5, et le coin 7. L'extrémité 9 du coin opposée aux galets affecte une forme semi-sphérique coopérant avec la forme complémentaire 13 prévue dans un élément de guidage 11. Referring now to the Figure, the mechanism comprises a cylindrical hollow body 1 enclosing the rollers 3, the roller cage 5, and the corner 7. The end 9 of the corner opposite the rollers has a semi-spherical shape cooperating with the shape complementary 13 provided in a guide element 11.

On assure ainsi une liaison à rotule entre l'élément de guidage 11 et l'ensemble coin-cage à galets permettant les débattements précités. This provides a ball joint between the guide element 11 and the wedge-cage assembly with rollers allowing the above-mentioned deflections.

L'extrémité du poussoir 15 est également pourvue d'une tête 17 sphérique ou semi-sphérique coopérant avec la forme complémentaire 19 prévue dans l'élément de guidage 11. On assure ainsi une liaison à rotule entre le poussoir 15 et l'élément de guidage 11. The end of the pusher 15 is also provided with a spherical or semi-spherical head 17 cooperating with the complementary shape 19 provided in the guide element 11. This thus provides a ball joint between the pusher 15 and the element guide 11.

L'élément de guidage 11 comporte une jupe cylindrique 21 coopérant avec la paroi interne du corps 1 pour assurer le coulissement de l'élément de guidage 11 strictement dans l'axe déterminé, quels que soient les débattements angulaires respectifs du poussoir 15 et de l'ensemble 3,5,7. The guide element 11 comprises a cylindrical skirt 21 cooperating with the internal wall of the body 1 to ensure the sliding of the guide element 11 strictly in the determined axis, whatever the respective angular deflections of the pusher 15 and the '' 3,5,7 together.

Une butée annulaire 23 est fixée à la paroi interne du corps 1 pour interdire l'échappement de l'élément de guidage 11. Une. An annular stop 23 is fixed to the internal wall of the body 1 to prevent the escape of the guide element 11. A.

coupelle 25 est solidaire de l'ensemble coin-cage à galets, et un ressort 27 disposé entre cette coupelle 25 et l'extrémité de la jupe 21 maintient l'ensemble en contact avec l'élément de guidage 11.cup 25 is integral with the wedge-cage assembly with rollers, and a spring 27 disposed between this cup 25 and the end of the skirt 21 keeps the assembly in contact with the guide element 11.

Enfin, un soufflet élastique 29 relie la paroi externe du corps 1 et le poussoir 15 de manière à éviter l'introduction de corps étrangers dans le mécanisme à coin. Finally, an elastic bellows 29 connects the external wall of the body 1 and the pusher 15 so as to avoid the introduction of foreign bodies into the wedge mechanism.

Bien que seul un mode de réalisation ait été représenté et décrit, il est évident que de nombreuses modifications pourront être apportées par l'homme du métier sans sortir du cadre de l'invention tel que défini par les revendications jointes.  Although only one embodiment has been shown and described, it is obvious that many modifications can be made by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

Claims (5)

REVENDICATIONS 1. Mécanisme à coin pour actionnement d'un frein, comportant un corps creux (1) sensiblement cylindrique dans lequel est enfermé un ensemble cage à galets-coin (3,5,7) commandé par un poussoir (15) faisant saillie dudit corps (1) par l'extrémité opposée audit coin (7), caractérisé en ce que ledit ensemble (3,5,7) est séparé dudit poussoir (15) au moyen d'un élément de guidage (11) coulissant dans ledit corps (1), le poussoir (15) et l'ensemble comportant chacun une liaison à rotule (17,19 ; 9,13) avec ledit élément de guidage (11). 1. Corner mechanism for actuating a brake, comprising a substantially cylindrical hollow body (1) in which is enclosed a roller-wedge cage assembly (3,5,7) controlled by a pusher (15) projecting from said body (1) by the end opposite to said corner (7), characterized in that said assembly (3,5,7) is separated from said pusher (15) by means of a guide element (11) sliding in said body ( 1), the pusher (15) and the assembly each comprising a ball joint (17,19; 9,13) with said guide element (11). 2. Mécanisme à coin selon la revendication 1, caractérisé en ce que ledit élément de guidage (11) comporte une jupe (21) coopérant avec la paroi interne dudit corps (1). 2. Corner mechanism according to claim 1, characterized in that said guide element (11) comprises a skirt (21) cooperating with the internal wall of said body (1). 3. Mécanisme à coin selon la revendication 2, caractérisé en ce qu'une coupelle (25) est solidaire dudit ensemble (3,5,7), un ressort de rappel (27) étant disposé entre ladite jupe (21) et ladite coupelle (25) pour assurer un contact permanent entre ledit élément de guidage (11) et ledit ensemble (3,5,7). 3. Corner mechanism according to claim 2, characterized in that a cup (25) is integral with said assembly (3,5,7), a return spring (27) being disposed between said skirt (21) and said cup (25) to ensure permanent contact between said guide element (11) and said assembly (3,5,7). 4. Mécanisme à coin selon l'une quelconque des revendications précédentes, caractérisé en ce que une butée annulaire (23) est fixée à la paroi interne dudit corps (1) pour interdire l'échappement dudit élément de guidage (11). 4. Corner mechanism according to any one of the preceding claims, characterized in that an annular stop (23) is fixed to the internal wall of said body (1) to prevent the escape of said guide element (11). 5. Mécanisme à coin selon l'une quelconque des revendications précédentes, caractérisé en ce que un soufflet élastique (29) relie la paroi externe dudit corps (1) et ledit poussoir (15).  5. Corner mechanism according to any one of the preceding claims, characterized in that an elastic bellows (29) connects the external wall of said body (1) and said pusher (15).
FR9001120A 1990-01-31 1990-01-31 Wedge mechanism for a brake Granted FR2657664A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9001120A FR2657664A1 (en) 1990-01-31 1990-01-31 Wedge mechanism for a brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9001120A FR2657664A1 (en) 1990-01-31 1990-01-31 Wedge mechanism for a brake

Publications (2)

Publication Number Publication Date
FR2657664A1 true FR2657664A1 (en) 1991-08-02
FR2657664B1 FR2657664B1 (en) 1994-12-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR9001120A Granted FR2657664A1 (en) 1990-01-31 1990-01-31 Wedge mechanism for a brake

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FR (1) FR2657664A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013217065A1 (en) * 2013-08-27 2015-03-05 Saf-Holland Gmbh brake unit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR60061E (en) * 1950-02-14 1954-09-22 Bendix Aviat Corp Brakes for vehicles
DE1450098A1 (en) * 1964-03-25 1969-07-31 Perrot Bremse Gmbh Deutsche Servo brake, especially for heavy and heaviest vehicles
DE1625704B1 (en) * 1964-03-25 1971-09-16 Perrot Bremse Gmbh Deutsche SPREAD DEVICE FOR A SERVO BRAKE, ESPECIALLY FOR HEAVY VEHICLES
EP0161119A1 (en) * 1984-02-29 1985-11-13 BENDIX France Disc brake actuator mechanism
EP0265173A2 (en) * 1986-10-18 1988-04-27 LUCAS INDUSTRIES public limited company Improvements in self-energising disc brakes
EP0272227A2 (en) * 1986-12-17 1988-06-22 Bendix Heavy Vehicle Systems Italia S.P.A. Diaphragm brake cylinder for motor vehicles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR60061E (en) * 1950-02-14 1954-09-22 Bendix Aviat Corp Brakes for vehicles
DE1450098A1 (en) * 1964-03-25 1969-07-31 Perrot Bremse Gmbh Deutsche Servo brake, especially for heavy and heaviest vehicles
DE1625704B1 (en) * 1964-03-25 1971-09-16 Perrot Bremse Gmbh Deutsche SPREAD DEVICE FOR A SERVO BRAKE, ESPECIALLY FOR HEAVY VEHICLES
EP0161119A1 (en) * 1984-02-29 1985-11-13 BENDIX France Disc brake actuator mechanism
EP0265173A2 (en) * 1986-10-18 1988-04-27 LUCAS INDUSTRIES public limited company Improvements in self-energising disc brakes
EP0272227A2 (en) * 1986-12-17 1988-06-22 Bendix Heavy Vehicle Systems Italia S.P.A. Diaphragm brake cylinder for motor vehicles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013217065A1 (en) * 2013-08-27 2015-03-05 Saf-Holland Gmbh brake unit
DE102013217065B4 (en) * 2013-08-27 2015-10-29 Saf-Holland Gmbh brake unit
US10001185B2 (en) 2013-08-27 2018-06-19 Saf-Holland Gmbh Brake unit
DE102013217065C5 (en) 2013-08-27 2022-11-17 Saf-Holland Gmbh brake unit

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Publication number Publication date
FR2657664B1 (en) 1994-12-30

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