FR2747751A1 - Disc brake - Google Patents
Disc brake Download PDFInfo
- Publication number
- FR2747751A1 FR2747751A1 FR9604967A FR9604967A FR2747751A1 FR 2747751 A1 FR2747751 A1 FR 2747751A1 FR 9604967 A FR9604967 A FR 9604967A FR 9604967 A FR9604967 A FR 9604967A FR 2747751 A1 FR2747751 A1 FR 2747751A1
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- FR
- France
- Prior art keywords
- disc
- support
- branch
- vehicle
- plane
- 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
Links
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 230000035939 shock Effects 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000001072 colon Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- 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
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
- F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
- F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
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- 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
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
-
- 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
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
- F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
- F16D55/22655—Constructional details of guide pins
-
- 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
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0008—Brake supports
- F16D2055/0012—Brake supports integral with vehicle suspension
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
Description
FREIN A DISQUE A COUPLES PARASITES REDUITS. DISC BRAKE WITH REDUCED PARASITE TORQUES.
La présente invention concerne un frein à disque pour véhicule à moteur, comprenant
- deux éléments de frein mobiles l'un par rapport à l'autre, dont l'un est un étrier chevauchant un disque de frein de rayon déterminé, et dont l'autre est un support fixé au véhicule, le disque adoptant un premier sens de rotation pour un déplacement du véhicule en marche avant et étant délimité, dans un plan médian, par une périphérie circulaire partageant ce plan médian en points intérieurs et en points extérieurs;
- des moyens de serrage comprenant un cylindre solidaire de l'étrier et présentant en regard du disque une ouverture fermée par un piston mobile suivant un premier axe, le disque passant entre ce piston et un nez de l'étrier;
- des moyens de guidage permettant un coulissement de l'étrier par rapport au support lors d'un actionnement des moyens de serrage, ces moyens de guidage comprenant au moins une première colonnette fixée au support perpendiculairement au disque et formant un premier appui de l'étrier sur le support, un premier alésage formé dans l'étrier et coulissant sur cette première colonnette, et un second appui décalé par rapport à la première colonnette dans le premier sens de rotation du disque, et
- deux éléments de friction tournés vers des faces opposées du disque, portés par le support, enserrés entre le piston et le nez d'étrier, et appliqués sur le disque lors de l'actionnement des moyens de serrage.The present invention relates to a disc brake for a motor vehicle, comprising
- two brake elements movable relative to each other, one of which is a caliper straddling a brake disc of determined radius, and the other of which is a support fixed to the vehicle, the disc adopting a first direction of rotation for moving the vehicle forward and being delimited, in a median plane, by a circular periphery sharing this median plane in interior points and in exterior points;
- clamping means comprising a cylinder integral with the caliper and having opposite the disc an opening closed by a piston movable along a first axis, the disc passing between this piston and a nose of the caliper;
- guide means allowing the stirrup to slide relative to the support during actuation of the clamping means, these guide means comprising at least one first column fixed to the support perpendicular to the disc and forming a first support of the stirrup on the support, a first bore formed in the stirrup and sliding on this first baluster, and a second support offset with respect to the first baluster in the first direction of rotation of the disc, and
- Two friction elements facing opposite faces of the disc, carried by the support, sandwiched between the piston and the caliper nose, and applied to the disc when the clamping means are actuated.
De tels freins sont bien connus dans l'art antérieur. comme le montre par exemple le document GB-A-2 202 287. Such brakes are well known in the prior art. as shown for example in GB-A-2 202 287.
Un problème très ancien qui se pose dans les freins de ce type, dits "à étrier coulissant", est la déformation que subissent les divers composants de tels freins en fonctionnement, en particulier les colonnettes, dont des déformations importantes entraînent une usure dissymétrique des éléments de friction et un mauvais retour de l'étrier dans sa position de repos après relâchement du frein. A very old problem which arises in brakes of this type, called "sliding caliper", is the deformation undergone by the various components of such brakes in operation, in particular the balusters, whose significant deformations cause asymmetrical wear of the elements. friction and a bad return of the caliper to its rest position after releasing the brake.
L'invention se situe dans ce contexte et a pour but de proposer un frein à disque à étrier coulissant, de structure simple, dans lequel les couples de flexion appliqués aux colonnettes sont réduits par rapport à la valeur qu'ils présentent dans les freins à disque actuels. The invention is situated in this context and aims to provide a sliding caliper disc brake, of simple structure, in which the bending torques applied to the balusters are reduced compared to the value which they present in the brakes. current disc.
A cette fin, le frein de l'invention, par ailleurs conforme au préambule ci-dessus, est essentiellement caractérisé en ce que la première colonnette s'étend suivant un second axe, parallèle au premier axe, qui coupe le plan médian du disque en un point extérieur à la périphérie du disque, en ce qu'une projection orthogonale du second appui sur le plan médian du disque est un point intérieur à la périphérie du disque, et en ce qu'un premier plan passant par les premier et second axes, et un second plan passant par le premier axe et le second appui forment entre eux un angle compris entre 170 degrés et 180 degrés. To this end, the brake of the invention, moreover in accordance with the preamble above, is essentially characterized in that the first column extends along a second axis, parallel to the first axis, which cuts the median plane of the disc in a point external to the periphery of the disc, in that an orthogonal projection of the second support on the median plane of the disc is a point internal to the periphery of the disc, and in that a first plane passing through the first and second axes , and a second plane passing through the first axis and the second support form between them an angle between 170 degrees and 180 degrees.
Dans un mode de réalisation typique de l'invention, la projection orthogonale du second appui sur le plan médian du disque est par exemple séparée de la périphérie du disque par une distance au moins égale au cinquième du rayon du disque. In a typical embodiment of the invention, the orthogonal projection of the second support on the median plane of the disc is for example separated from the periphery of the disc by a distance at least equal to one fifth of the radius of the disc.
Le second appui peut lui-même être constitué, comme c'est fréquemment le cas dans l'art antérieur, par une seconde colonnette solidaire du support et parallèle au premier axe. The second support can itself be constituted, as is frequently the case in the prior art, by a second column integral with the support and parallel to the first axis.
En outre, pour équilibrer les forces résistantes, le premier alésage est de préférence disposé de manière à être coupé par le plan médian du disque en deux parties dont chacune est au plus égale au double de l'autre. In addition, to balance the resistance forces, the first bore is preferably arranged so as to be cut by the median plane of the disc into two parts, each at most equal to twice the other.
Dans une application privilégiée de l'invention, le support est constitué par un portefusée présentant au moins des première et seconde branches radiales, en ce que la première branche et les éléments de fnction présentent des reliefs complémentaires permettant aux éléments de friction de s'accrocher à la première branche et de la tirer dans le premier sens de rotation du disque, et en ce que la seconde branche et les éléments de friction présentent des zones d'appui réciproques permettant aux éléments de friction de pousser la seconde branche dans le premier sens de rotation du disque. In a preferred application of the invention, the support is constituted by a portfolio having at least first and second radial branches, in that the first branch and the fnction elements have complementary reliefs allowing the friction elements to catch on to the first branch and to pull it in the first direction of rotation of the disc, and in that the second branch and the friction elements have reciprocal support zones allowing the friction elements to push the second branch in the first direction disc rotation.
n est alors avantageux, dans une telle application. de prévoir que la première branche du porte-fusée comporte des moyens pour supporter la première colonnette et un amortisseur du véhicule. n is then advantageous in such an application. to provide that the first branch of the stub axle comprises means for supporting the first column and a shock absorber of the vehicle.
n peut également être avantageux de prévoir que la première branche comporte des moyens pour supporter la première colonnette et des moyens pour supporter un mécanisme de commande de la direction de la roue du véhicule, et que la seconde branche comporte des moyens pour supporter le second appui et des moyens pour supporter un amortisseur du véhicule. It may also be advantageous to provide that the first branch comprises means for supporting the first pillar and means for supporting a mechanism for controlling the direction of the wheel of the vehicle, and that the second branch comprises means for supporting the second support. and means for supporting a shock absorber of the vehicle.
D'autres caractéristiques et avantages de l'invention ressortiront clairement de la des cription qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels: - La Figure 1 est une vue axiale du frein à disque réalisé selon les enseignements de la présente invention; - La Figure 2 est une vue radiale, en coupe partielle, du frein à disque de la Figure 1; - La Figure 3 est une vue en coupe partielle du frein à disque de la présente invention, selon les lignes m-m de la Figure 1 ou de la Figure 5; - La Figure 4 est une vue en coupe partielle du frein à disque de la présente invention, selon les lignes IV-IV de la Figure I ou de la Figure 5, et - La Figure 5 est une vue axiale d'une variante de réalisation du frein à disque de la Figure 1. Other characteristics and advantages of the invention will emerge clearly from the description which is made of it below, by way of indication and in no way limiting, with reference to the appended drawings, in which: - Figure 1 is an axial view of the brake disc made according to the teachings of the present invention; - Figure 2 is a radial view, in partial section, of the disc brake of Figure 1; - Figure 3 is a partial sectional view of the disc brake of the present invention, along the lines m-m of Figure 1 or Figure 5; - Figure 4 is a partial sectional view of the disc brake of the present invention, along lines IV-IV of Figure I or of Figure 5, and - Figure 5 is an axial view of an alternative embodiment of the disc brake in Figure 1.
On a représenté sur les Figures 1 et 2 un frein à disque. comportant un étrier 10 monté coulissant sur un support fixe 12, faisant partie intégrante ou étant solidaire, par exemple par vissage, d'une partie fixe 14 du véhicule telle qu'un porte-tiisée. Figures 1 and 2 show a disc brake. comprising a stirrup 10 slidably mounted on a fixed support 12, forming an integral part or being integral, for example by screwing, with a fixed part 14 of the vehicle such as a carrier.
L'étrier 10 chevauche un disque de frein 16 de rayon R et solidaire d'une roue du véhicule, tournant par exemple dans le sens de la flèche A (Figure I) lorsque le véhicule se déplace en marche avant. The caliper 10 overlaps a brake disc 16 of radius R and secured to a wheel of the vehicle, turning for example in the direction of arrow A (Figure I) when the vehicle is moving forward.
L'étrier 10 comporte sur un de ses côtés, appelé par convention côté intérieur, des moyens d'actionnement ou de serrage formés d'un alésage borgne 18 (Figure 2) ouvert du côté du disque 16 et formant un cylindre 18 dans lequel est susceptible de coulisser un piston 20 lorsqu'un fluide sous pression est introduit dans une chambre de travail 22 par un conduit d'amenée 24 destiné à être relié à une source de fluide sous pression, telle qu'un maîtrecylindre (non représenté) commandant le circuit de freinage du véhicule automobile. Un joint carré 25 logé dans une gorge de l'alésage 18 assure l'étanchéité du coulissement du piston 20 dans le cylindre 18. The stirrup 10 has on one of its sides, conventionally called the inner side, actuation or tightening means formed of a blind bore 18 (Figure 2) open on the side of the disc 16 and forming a cylinder 18 in which is capable of sliding a piston 20 when a pressurized fluid is introduced into a working chamber 22 by a supply duct 24 intended to be connected to a source of pressurized fluid, such as a master cylinder (not shown) controlling the motor vehicle braking system. A square seal 25 housed in a groove in the bore 18 seals the sliding of the piston 20 in the cylinder 18.
Le piston 20 est ainsi susceptible d'amener un élément de friction 24 directement en contact d'une face du disque 16 et un autre élément de friction 26 contre l'autre face du disque 16 par réaction au moyen d'un nez d'étrier 28 formé sur l'autre coté de l'étrier 10, appelé par convention côté extérieur, lorsque l'étrier coulisse axialement par rapport au support 12. The piston 20 is thus capable of bringing a friction element 24 directly into contact with one face of the disc 16 and another friction element 26 against the other face of the disc 16 by reaction by means of a caliper nose. 28 formed on the other side of the stirrup 10, conventionally called on the outside side, when the stirrup slides axially relative to the support 12.
Comme on l'a représenté sur les Figures, le coulissement de l'étrier sur le support fixe 12 est obtenu au moyen de deux appuis coulissants axialement 30 et 32. As shown in the Figures, the sliding of the stirrup on the fixed support 12 is obtained by means of two axially sliding supports 30 and 32.
Dans l'exemple de réalisation représenté sur les Figures, le support 12 est d'une seule pièce avec le porte-fusée 14. Ce dernier est formé avec au moins deux branches radiales 40 et 42, servant d'une part à la fixation des appuis coulissants 30 et 32, et d'autre part au guidage des éléments de fnction 24 et 26. In the embodiment shown in the Figures, the support 12 is in one piece with the stub axle 14. The latter is formed with at least two radial branches 40 and 42, serving on the one hand for fixing the sliding supports 30 and 32, and on the other hand to guide the fnction elements 24 and 26.
Dans cet exemple, la première branche radiale 40 et les éléments de friction 24 et 26 présentent des reliefs complémentaires 44 et 46 respectivement pour permettre aux éléments de friction 24 et 26 de s'accrocher à cette première branche, et de la tirer dans le sens de la flèche A (Figure 1) lors d'une action de freinage pendant que le véhicule progresse en marche avant. In this example, the first radial branch 40 and the friction elements 24 and 26 have complementary reliefs 44 and 46 respectively to allow the friction elements 24 and 26 to catch on this first branch, and to pull it in the direction arrow A (Figure 1) during a braking action while the vehicle is moving forward.
De façon avantageuse, la première branche radiale 40 est formée sur une extension 60 du porte-fusée 14, normalement utilisée pour fixer l'amortisseur associé à cette roue du véhicule. Advantageously, the first radial branch 40 is formed on an extension 60 of the stub axle 14, normally used to fix the damper associated with this wheel of the vehicle.
De la même façon, la seconde branche 42 présente une surface de butée 48 sur laquelle viennent en appui des zones d'appui 50 formées sur les éléments de friction 24 et 26, permettant à ces derniers de pousser la seconde branche 42 lors de cette meme action de freinage. Similarly, the second branch 42 has an abutment surface 48 on which abut support zones 50 formed on the friction elements 24 and 26, allowing the latter to push the second branch 42 during this same braking action.
Conformément à la présente invention, le premier appui coulissant 30 est formé d'une colonnette axiale 30, d'axe A1 solidaire du support fixe 12, par exemple par vissage, et reçue avec un jeu réduit dans un alésage axial borgne 34 de l'étrier 10. La colonnette axiale 30 s'étend à partir du support fixe 12 axialement, parallèlement à l'axe du disque 16 et au dessus de la périphérie P de ce dernier, en direction de l'extérieur, de façon à dépasser le plan médian
M (Figures 2 à 4) du disque 16.According to the present invention, the first sliding support 30 is formed of an axial column 30, of axis A1 secured to the fixed support 12, for example by screwing, and received with reduced clearance in a blind axial bore 34 of the stirrup 10. The axial column 30 extends from the fixed support 12 axially, parallel to the axis of the disc 16 and above the periphery P of the latter, in the direction of the outside, so as to exceed the plane median
M (Figures 2 to 4) of disc 16.
Selon un mode de réalisation préfëré, le plan médian M du disque 16 coupe l'alésage 34 en deux parties sensiblement égales, la longueur de chacune étant au plus égale au double de l'autre. Une telle disposition permet au frein à disque réalisé conformément à la présente invention de conserver ses caractéristiques de tonctionnement quel que soit le degré d'usure des éléments de friction 24 et 26. According to a preferred embodiment, the median plane M of the disc 16 cuts the bore 34 into two substantially equal parts, the length of each being at most equal to twice the other. Such an arrangement allows the disc brake produced in accordance with the present invention to retain its operating characteristics whatever the degree of wear of the friction elements 24 and 26.
Le second appui coulissant 32 est formé d'une seconde colonnette axiale 32, d'axe A2, elle aussi solidaire du support fixe 12, et reçue, avec un jeu légèrement supérieur au jeu de la première colonnette 30 dans son alésage 34, dans un alésage axial traversant 36 de l'étrier 10. The second sliding support 32 is formed by a second axial column 32, of axis A2, also integral with the fixed support 12, and received, with a clearance slightly greater than the clearance of the first baluster 30 in its bore 34, in a axial bore through 36 of stirrup 10.
La colonnette axiale 32 s'étend à partir du support fixe 12 axialement, parallèlement à l'axe du disque 16, en direction de l'intérieur, de telle manière que l'intersection entre l'axe de la colon nette 32 et le plan médian M du disque 16 soit située à l'intérieur de la périphérie P du disque 16.The axial column 32 extends from the fixed support 12 axially, parallel to the axis of the disc 16, inward direction, so that the intersection between the axis of the net colon 32 and the plane median M of the disc 16 is located inside the periphery P of the disc 16.
Selon un mode de réalisation préfëré, le point d'intersection entre l'axe de la colonnette 32 et le plan médian M du disque 16 est situé à une distance de la périphérie P du disque 16 au moins égale au cinquième du rayon R du disque 16. According to a preferred embodiment, the point of intersection between the axis of the column 32 and the median plane M of the disc 16 is located at a distance from the periphery P of the disc 16 at least equal to one fifth of the radius R of the disc 16.
De plus, les axes A1 et A2 sont disposés sensiblement symétriquement par rapport à l'axe A3 du cylindre 18. De façon plus précise, les axes A1 et A2 sont situés à la même distance de l'axe A3, et les plans P1, contenant les axes Al et A, et P, contenant les axes A2 et A3, forment entre eux un angle compris entre 170 et 180 degrés. In addition, the axes A1 and A2 are arranged substantially symmetrically with respect to the axis A3 of the cylinder 18. More precisely, the axes A1 and A2 are located at the same distance from the axis A3, and the planes P1, containing the axes Al and A, and P, containing the axes A2 and A3, form between them an angle between 170 and 180 degrees.
Grâce à un tel mode de réalisation, la colonnette 32 coulisse dans l'étrier 10 à une distance minimale de l'axe A3 d'action du piston 20, compte tenu du rayon du cylindre 18 et de son propre rayon, et, de plus, sensiblement dans le plan des forces de réaction défini par le plan passant par les axes A1 et A2. Thanks to such an embodiment, the small column 32 slides in the caliper 10 at a minimum distance from the axis A3 of action of the piston 20, taking into account the radius of the cylinder 18 and its own radius, and, moreover , substantially in the plane of the reaction forces defined by the plane passing through the axes A1 and A2.
Lors d'une action de freinage, le véhicule se déplaçant en marche avant, un fluide sous pression est fourni à la chambre 22 pour faire avancer le piston 20 vers le disque 16, et, par réaction, faire s'approcher le nez 28 du disque 16. Les éléments de friction 24 et 26 sont ainsi amenés en contact avec les faces du disque 16 pour en ralentir la vitesse de rotation. During a braking action, the vehicle moving forward, a pressurized fluid is supplied to the chamber 22 to advance the piston 20 towards the disc 16, and, by reaction, to bring the nose 28 of the disc 16. The friction elements 24 and 26 are thus brought into contact with the faces of the disc 16 to slow down the speed of rotation.
On voit donc bien que, grâce à l'invention, les forces de réaction dûes au frottement des éléments de friction 24 et 26 sur le disque 16 sont transmises à l'étrier 10 par les colonnettes 30 et 32, symétriques par rapport à l'axe du cylindre 18 et du piston 20 exerçant l'effort de freinage. n en résulte donc que, même sous des efforts de freinage élevés, le coulissement de l'étrier sur les colonnettes 30 et 32 ne sera pas contrarié. It can therefore be seen that, thanks to the invention, the reaction forces due to the friction of the friction elements 24 and 26 on the disc 16 are transmitted to the stirrup 10 by the balusters 30 and 32, symmetrical with respect to the axis of the cylinder 18 and of the piston 20 exerting the braking force. It therefore follows that, even under high braking forces, the sliding of the caliper on the balusters 30 and 32 will not be adversely affected.
De plus, l'étrier 10 coulisse sur la colonnette 30, située en amont par rapport au sens de rotation du disque 16, et s'étendant au delà du plan médian M du disque 16, dans lequel est contenues la résultante des forces de frottement des éléments de friction 24 et 26 sur les faces du disque 16. Il en résulte donc que le couple de torsion auquel est soumis l'étrier 10 lors d'une action de freinage est réduit à une valeur minimale. de même que les déformations qu'il peut être amené à subir. In addition, the stirrup 10 slides on the baluster 30, situated upstream with respect to the direction of rotation of the disc 16, and extending beyond the median plane M of the disc 16, in which the resultant of the friction forces is contained. friction elements 24 and 26 on the faces of the disc 16. It therefore follows that the torsional torque to which the caliper 10 is subjected during a braking action is reduced to a minimum value. as well as the deformations which it can be brought to undergo.
Enfin, la disposition particulière selon l'invention des axes A1 et A2 des colonnettes 30 et 32, l'un passant au delà de la périphérie P du disque 16 et la projection de l'autre sur le plan médian M du disque 16 étant à l'intérieur de la périphérie P du disque, permet de réduire de façon importante la distance entre ces axes A1 et A2, ce qui résulte en un couple de frottement minimal puisque la résultante des forces de réaction est située au voisinage immédiat des zones de coulissement de l'étrier sur les colonnettes. L'arc-boutement des colonnettes est ainsi réduit au minimum, et le coulissement peut se produire dans des conditions optimales. Finally, the particular arrangement according to the invention of the axes A1 and A2 of the columns 30 and 32, one passing beyond the periphery P of the disc 16 and the projection of the other onto the median plane M of the disc 16 being at inside the periphery P of the disc, makes it possible to significantly reduce the distance between these axes A1 and A2, which results in minimal friction torque since the resultant of the reaction forces is located in the immediate vicinity of the sliding zones of the stirrup on the balusters. The bracing of the columns is thus reduced to a minimum, and sliding can occur under optimal conditions.
On a représenté sur la Figure 5 une variante du mode de réalisation qui vient d'être décrit, et plus particulièrement applicable dans le cas ou le frein à disque de l'invention est destiné à équiper une roue directrice d'un véhicule. Selon cette variante, la première branche radiale 40' est formée sur une extension du porte-ftisée 14, normalement utilisée pour fixer une rotule de direction 62, et la seconde branche 42' est tonnée sur l'extension 60 du porte-fusée qui est utilisée pour fixer l'amortisseur associé à cette roue du véhicule. There is shown in Figure 5 a variant of the embodiment which has just been described, and more particularly applicable in the case where the disc brake of the invention is intended to equip a steering wheel of a vehicle. According to this variant, the first radial branch 40 ′ is formed on an extension of the jacked carrier 14, normally used to fix a steering ball joint 62, and the second branch 42 ′ is knocked on the extension 60 of the rocket carrier which is used to fix the shock absorber associated with this vehicle wheel.
Les autres caractéristiques du frein à disque représenté sur le Figure 5 sont identiques à celles du frein à disque décrit plus haut, elles procurent les mêmes avantages, et elles ne seront donc pas explicitées plus en détail. The other characteristics of the disc brake shown in Figure 5 are identical to those of the disc brake described above, they provide the same advantages, and they will therefore not be explained in more detail.
On a donc bien réalisé un frein à disque à étrier coulissant, dans lequel la déformation que subissent l'étrier et les colonnettes lors d'une action de freinage est réduite à une valeur minimale, résultant en un usure symétrique des éléments de friction, et facilitant le retour en position de repos de l'étrier après relâchement du frein. A disc brake with sliding caliper has therefore been produced, in which the deformation which the caliper and the columns undergo during a braking action is reduced to a minimum value, resulting in symmetrical wear of the friction elements, and facilitating the return to the caliper rest position after releasing the brake.
Bien entendu, l'invention n'est pas limitée au mode de réalisation qui a été décrit, mais elle est susceptible au contraire de recevoir de nombreuses modifications qui apparaîtront à l'homme du métier et qui rentrent dans le cadre des revendications annexées. C'est ainsi par exemple que le support fixe 12 pourrait également être constitué d'une chape rapportée sur le porte-fusée 14. Of course, the invention is not limited to the embodiment which has been described, but it is on the contrary capable of receiving numerous modifications which will appear to a person skilled in the art and which fall within the scope of the appended claims. Thus, for example, the fixed support 12 could also consist of a clevis attached to the stub axle 14.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9604967A FR2747751B1 (en) | 1996-04-22 | 1996-04-22 | DISC BRAKE WITH REDUCED PARASITE TORQUES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9604967A FR2747751B1 (en) | 1996-04-22 | 1996-04-22 | DISC BRAKE WITH REDUCED PARASITE TORQUES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2747751A1 true FR2747751A1 (en) | 1997-10-24 |
| FR2747751B1 FR2747751B1 (en) | 1998-05-22 |
Family
ID=9491400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9604967A Expired - Fee Related FR2747751B1 (en) | 1996-04-22 | 1996-04-22 | DISC BRAKE WITH REDUCED PARASITE TORQUES |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2747751B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2795147A1 (en) * | 1999-06-15 | 2000-12-22 | Jean Louis Bourrel | Disc brake of Zero Noise kind has brake caliper, clevis and two inverted small columns which can slide above the disk |
| EP1614924A1 (en) * | 2004-07-07 | 2006-01-11 | ROBERT BOSCH GmbH | Floating caliper disc brake with means for preventing the deformation of the brake carrier during braking |
| WO2006021682A1 (en) | 2004-08-19 | 2006-03-02 | Robert Bosch Gmbh | Disk brake equipped reduced-size yoke |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1600007B1 (en) * | 1966-05-11 | 1970-06-25 | Messier Sa | Partially lined floating caliper disc brake |
| US4197926A (en) * | 1978-11-27 | 1980-04-15 | Chrysler Corporation | Brake and steering knuckle apparatus |
| US4347917A (en) * | 1976-12-07 | 1982-09-07 | Sumitomo Electric Industries, Ltd. | Floating type disc brake |
| EP0350867A1 (en) * | 1988-07-15 | 1990-01-17 | LUCAS INDUSTRIES public limited company | Spot-type disc brake |
-
1996
- 1996-04-22 FR FR9604967A patent/FR2747751B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1600007B1 (en) * | 1966-05-11 | 1970-06-25 | Messier Sa | Partially lined floating caliper disc brake |
| US4347917A (en) * | 1976-12-07 | 1982-09-07 | Sumitomo Electric Industries, Ltd. | Floating type disc brake |
| US4197926A (en) * | 1978-11-27 | 1980-04-15 | Chrysler Corporation | Brake and steering knuckle apparatus |
| EP0350867A1 (en) * | 1988-07-15 | 1990-01-17 | LUCAS INDUSTRIES public limited company | Spot-type disc brake |
Non-Patent Citations (1)
| Title |
|---|
| GIRAULDON: "Evolution technologique des freins à disque tourisme", INGÉNIEURS DE L'AUTOMOBILE, no. 7, 1982, PARIS, pages 64 - 67, XP002022587 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2795147A1 (en) * | 1999-06-15 | 2000-12-22 | Jean Louis Bourrel | Disc brake of Zero Noise kind has brake caliper, clevis and two inverted small columns which can slide above the disk |
| EP1614924A1 (en) * | 2004-07-07 | 2006-01-11 | ROBERT BOSCH GmbH | Floating caliper disc brake with means for preventing the deformation of the brake carrier during braking |
| FR2872875A1 (en) * | 2004-07-07 | 2006-01-13 | Bosch Gmbh Robert | FLOATING CALIPER DISC BRAKE HAVING MEANS FOR PREVENTING THE DEFORMATION OF THE BRAKE ON BRAKES |
| WO2006021682A1 (en) | 2004-08-19 | 2006-03-02 | Robert Bosch Gmbh | Disk brake equipped reduced-size yoke |
| US8708111B2 (en) | 2004-08-19 | 2014-04-29 | Robert Bosch Gmbh | Disk brake equipped reduced-size yoke |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2747751B1 (en) | 1998-05-22 |
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| ST | Notification of lapse |
Effective date: 20151231 |