WO1995033141A1 - Disc brake with improved shoe side spring - Google Patents
Disc brake with improved shoe side spring Download PDFInfo
- Publication number
- WO1995033141A1 WO1995033141A1 PCT/EP1995/001490 EP9501490W WO9533141A1 WO 1995033141 A1 WO1995033141 A1 WO 1995033141A1 EP 9501490 W EP9501490 W EP 9501490W WO 9533141 A1 WO9533141 A1 WO 9533141A1
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- WIPO (PCT)
- Prior art keywords
- disc
- yoke
- shoe
- edge
- blade
- Prior art date
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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
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
- F16D65/095—Pivots or supporting members therefor
- F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
- F16D65/0972—Resilient means interposed between pads and supporting members or other brake parts transmitting brake reaction force, e.g. elements interposed between torque support plate and pad
Definitions
- the present invention relates to a disc brake for a motor vehicle, comprising a yoke, first and second pads each of which has first and second substantially vertical edges and a central zone covered with a layer of friction material, each pad being held by the yoke in the vicinity of its edges, a caliper mounted sliding with respect to the yoke, a brake motor associated with the caliper and capable of being actuated to cause the application of the pads on the disc in a first substantially relative first direction perpendicular to the disc and pointing towards it, and elastic means for moving the first at least of the pads from the disc after the brake has been actuated, these elastic means comprising at least one first spring comprising at least one first blade extending at least partially in a plane and arranged between the yoke and the first edge of the first shoe, this first blade having an edge outer and an inner edge substantially parallel to the disc, the second of which is closer to the disc than the first, and which are distant from each other by a distance at least equal to a distance separating two extreme
- Disc brakes of this type have been known for a long time in the prior art under the name of sliding caliper disc brakes, and an example is given in the document JP-A-58 142 038.
- any insufficient recoil of at least one of the pads after braking results in the fact that this pad continues to rub on the disc, which causes a parasitic residual torque opposing the running of the vehicle, as well as premature wear of the skate.
- the object of the present invention is to propose a sliding caliper disc brake provided with a spring of simple construction and making it possible to obtain the satisfactory recoil of at least one of the pads without interfering with the normal operation of the brake.
- the brake of the invention is essentially characterized in that the useful section of the first tongue comprises a second part which constitutes a free end for this first tongue, which forms with the first part a angle at which it points towards the central area of the first pad, and which rests on the edge of the layer of friction material carried by this pad.
- this brake further comprises a second blade similar to the first, disposed between the yoke and the second edge of the first pad and having at least a second tongue similar to the first.
- the first and second blades are carried by respective first and second springs.
- first and second springs also carry, respectively, third and fourth blades, similar to the first two and acting respectively in the vicinity of the first and second edges of the second shoe.
- each spring is made of stainless steel and has at least one attachment profile making it possible to attach it to the yoke.
- FIG. 1 is a top view of a disc brake according to the invention.
- FIG. 2 is a partial sectional view of this brake along line II-II of Figure 1;
- FIG. 3 is an enlarged detail view, illustrating the first spring, seen from the side;
- FIG. 4 is an enlarged detail view, illustrating the first spring, seen from the front.
- FIG. 5 is an enlarged detail view, illustrating the first spring, seen from above.
- the invention relates generally to sliding caliper disc brakes intended to equip motor vehicles.
- Such brakes essentially comprise a first support 1, called “clevis”, fixed relative to the vehicle, a caliper 2 mounted to slide relative to the clevis, and pads 3, 4.
- Each pad has first and second edges 3a, 3b, 4a, 4b substantially vertical and a central zone 3c, 4c covered with a layer of friction material 30, 40 and each pad is held in the yoke 1 by means of of its edges.
- a brake motor 5, associated with the caliper 2 is capable of being actuated to cause the application of the pads on the disc 6 in a first relative direction Dl, substantially perpendicular to the disc and pointing towards it for each of the pads.
- Elastic means are further provided for distancing from the disc 6 at least a first of the pads, for example the pad 3, after actuation of the brake.
- these elastic means comprise at least a first spring 7, and preferably also a second spring 8, similar to the first and arranged symmetrically with respect to it.
- the first spring 7 comprises at least a first blade 71 extending at least partially in a plane P ( Figures 2 and 5) and disposed between the yoke 1 and the first edge 3a of the first shoe 3, this first blade having ( Figure 4 ) an outer edge 71a and an inner edge 71b both substantially parallel to the disc 6.
- the internal edge 71b is closer to the disc than the external edge 71a, and the distance L between these edges, which determines the width of the blade 71, is at least equal to the stroke made by the first shoe relative to the yoke between the position furthest from the disc, which it occupies when it is new while the brake is at rest, and the position closest to the disc, which it occupies when it is used while the brake is applied .
- the edge 3a of the shoe 3 is always supported on the blade 71.
- the first blade 71 comprises at least one first flexible tongue 710 which is connected to its external edge 71a and which, at a distance from this edge, has a useful section of which a first part 710a points towards the disk.
- this useful section comprises a second part 710b which constitutes a free end for the first tab 710, which forms with the first part 710a an angle A thanks to which it points towards the central zone 3c of the first shoe 3, and which rests on the edge 30a of the layer of friction material carried by this pad.
- the free end 710b of the tongue 710 exerts on the edge 30a of the layer of friction material 30 of this shoe a force, a first component of which is oriented in a direction D2, inverse to the first relative direction Dl ( Figure 5), and which allows a satisfactory recoil of the skate, and a second component, oriented towards the central zone 3c of the first skate, and which avoids noise caused by impacts between this skate and the yoke.
- a second spring 8 similar to the first spring 7, carries a second blade not visible but similar to the first blade 71, disposed between the yoke and the second edge 3b of the first shoe 3 and having at least one second tongue itself not visible but similar to the first tongue 710.
- first and second blades previously described are therefore symmetrical with respect to the plane perpendicular to the disc 6, passing through its axis, and identified by its trace Q, visible in FIG. 1.
- the first spring preferably carries a third blade 73 symmetrical with the first blade 71 with respect to the median plane of the disc 6, the trace of which in FIG. 1 coincides with the line II-II, the third blade being joined to the first by a junction 70 forming an integral part of the spring 7.
- the second spring 8 itself carries a fourth blade, symmetrical with the second blade with respect to the median plane of the disc 6, these third and fourth blades, such as 73, acting in the vicinity of the respective first and second edges, such that 40a, of the layer of friction material 40 of the second shoe 4.
- Each spring is for example made of stainless steel and has at least one attachment profile such as 75 (FIGS. 2 and 3) making it possible to hold it in place on the yoke 1.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a disc brake with sliding caliper wherein spring means are provided to push back at least one of the shoes (3, 4) after the braking operation. These means comprise at least a first spring (7) having at least one tongue (710) whereon slides the shoe (3), and which is intended to exert on the latter, due to its curved shape, a return force in a direction (D2) opposite to the direction (D1) of the actuation force received by the shoe (3) upon braking.
Description
FREIN A DISQUE AVEC RESSORT LATERAL DE PATIN PERFECTIONNE DISC BRAKE WITH IMPROVED PAD LATERAL SPRING
La présente invention concerne un frein à disque pour véhicule automobile, comprenant une chape, des premier et second patins dont chacun présente des premier et second bords sensiblement verticaux et une zone centrale recouverte d'une couche de matériau de friction, chaque patin se trouvant maintenu par la chape au voisinage de ses bords, un étrier monté coulissant par rapport à la chape, un moteur de frein associé à l'étrier et susceptible d'être actionné pour provoquer l'application des patins sur le disque suivant une première direction relative sensiblement perpendiculaire au disque et pointant vers lui, et des moyens élastiques pour éloigner du disque le premier au moins des patins après l'actionnement du frein, ces moyens élastiques comprenant au moins un premier ressort comportant au moins une première lame s'étendant au moins partiellement dans un plan et disposée entre la chape et le premier bord du premier patin, cette première lame présentant un bord externe et un bord interne sensiblement parallèles au disque, dont le second est plus proche du disque que le premier, et qui sont éloignés l'un de l'autre d'une distance au moins égale à une distance séparant deux positions extrêmes que le premier patin peut adopter par rapport à la chape, cette première lame comportant au moins une première languette flexible qui est reliée à son bord externe et qui, à distance de ce bord, présente une section utile dont une première partie au moins pointe vers le disque.The present invention relates to a disc brake for a motor vehicle, comprising a yoke, first and second pads each of which has first and second substantially vertical edges and a central zone covered with a layer of friction material, each pad being held by the yoke in the vicinity of its edges, a caliper mounted sliding with respect to the yoke, a brake motor associated with the caliper and capable of being actuated to cause the application of the pads on the disc in a first substantially relative first direction perpendicular to the disc and pointing towards it, and elastic means for moving the first at least of the pads from the disc after the brake has been actuated, these elastic means comprising at least one first spring comprising at least one first blade extending at least partially in a plane and arranged between the yoke and the first edge of the first shoe, this first blade having an edge outer and an inner edge substantially parallel to the disc, the second of which is closer to the disc than the first, and which are distant from each other by a distance at least equal to a distance separating two extreme positions than the first skate can adopt relative to the yoke, this first blade comprising at least a first flexible tongue which is connected to its outer edge and which, at a distance from this edge, has a useful section of which a first part at least points towards the disc.
Des freins à disque de ce type sont connus depuis fort longtemps dans l'art antérieur sous la dénomination de freins à disque à étrier coulissant, et un exemple en est donné dans le document JP-A-58 142 038.Disc brakes of this type have been known for a long time in the prior art under the name of sliding caliper disc brakes, and an example is given in the document JP-A-58 142 038.
Un problème également bien connu dans l'art antérieur avec ce type de frein réside dans la difficulté à obtenir un recul satisfaisant des patins après une opération de freinage, et notamment le recul du patin dit "extérieur" qui est situé à l'opposé du moteur de frein et qui ne peut en effet reprendre sa position de repos que par un mouvement de l'étrier.A problem also well known in the prior art with this type of brake lies in the difficulty in obtaining a satisfactory recoil of the pads after a braking operation, and in particular the recoil of the so-called "outer" pad which is located opposite the brake motor and which can indeed return to its rest position only by a movement of the caliper.
Or, tout recul insuffisant de l'un au moins des patins après le freinage se traduit par le fait que ce patin continue de frotter sur le disque, ce qui provoque un couple résiduel parasite s'opposant à la marche du véhicule, ainsi qu'une usure prématurée du patin.However, any insufficient recoil of at least one of the pads after braking results in the fact that this pad continues to rub on the disc, which causes a parasitic residual torque opposing the running of the vehicle, as well as premature wear of the skate.
Bien que différents ressorts déjà proposés pour éviter ce couple résiduel donnent
satisfaction, la plupart de ces ressorts présentent l'inconvénient soit d'être d'une réalisation complexe, soit de perturber le fonctionnement du frein de façon sensible.Although different springs already proposed to avoid this residual torque give satisfaction, most of these springs have the disadvantage either of being of a complex embodiment, or of disturbing the operation of the brake significantly.
D'autres ressorts, comme celui qu'illustre le document japonais précité, ne permettent pas un recul suffisant des patins.Other springs, such as that illustrated in the aforementioned Japanese document, do not allow sufficient retraction of the pads.
Dans ce contexte, la présente invention a pour but de proposer un frein à disque à étrier coulissant doté d'un ressort de construction simple et permettant d'obtenir le recul satisfaisant de l'un au moins des patins sans interférer avec le fonctionnement normal du frein.In this context, the object of the present invention is to propose a sliding caliper disc brake provided with a spring of simple construction and making it possible to obtain the satisfactory recoil of at least one of the pads without interfering with the normal operation of the brake.
A cette fin, le frein de l'invention, du type identifié précédemment, est essentiellement caractérisé en ce que la section utile de la première languette comprend une seconde partie qui constitue une extrémité libre pour cette première languette, qui forme avec la première partie un angle grâce auquel elle pointe vers la zone centrale du premier patin, et qui s'appuie sur le bord de la couche de matériau de friction portée par ce patin.To this end, the brake of the invention, of the type identified above, is essentially characterized in that the useful section of the first tongue comprises a second part which constitutes a free end for this first tongue, which forms with the first part a angle at which it points towards the central area of the first pad, and which rests on the edge of the layer of friction material carried by this pad.
Pour un fonctionnement optimal, ce frein comprend en outre une seconde lame semblable à la première, disposée entre la chape et le second bord du premier patin et présentant au moins une seconde languette semblable à la première.For optimal operation, this brake further comprises a second blade similar to the first, disposed between the yoke and the second edge of the first pad and having at least a second tongue similar to the first.
Selon un mode de réalisation très simple, les première et seconde lames sont portées par des premier et second ressorts respectifs.According to a very simple embodiment, the first and second blades are carried by respective first and second springs.
Dans ce cas, il est avantageux que les premier et second ressorts portent en outre, repectivement, des troisième et quatrième lames, semblables aux deux premières et agissant respectivement au voisinage des premier et second bords du second patin.In this case, it is advantageous that the first and second springs also carry, respectively, third and fourth blades, similar to the first two and acting respectively in the vicinity of the first and second edges of the second shoe.
De préférence, chaque ressort est réalisé en acier inoxydable et présente au moins un profil d'accrochage permettant de le rendre solidaire de la chape.Preferably, each spring is made of stainless steel and has at least one attachment profile making it possible to attach it to the yoke.
D'autres caractéristiques et avantages de l'invention ressortiront clairement de la
description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels :Other characteristics and advantages of the invention will emerge clearly from the description given below, by way of indication and in no way limitative, with reference to the appended drawings, in which:
- la Figure 1 est une vue de dessus d'un frein à disque conforme à l'invention; et- Figure 1 is a top view of a disc brake according to the invention; and
- la Figure 2 est une vue en coupe partielle de ce frein suivant la ligne II-II de la Figure 1;- Figure 2 is a partial sectional view of this brake along line II-II of Figure 1;
- la Figure 3 est une vue de détail agrandie, illustrant le premier ressort, vu de côté;- Figure 3 is an enlarged detail view, illustrating the first spring, seen from the side;
- la Figure 4 est une vue de détail agrandie, illustrant le premier ressort, vu de face; et- Figure 4 is an enlarged detail view, illustrating the first spring, seen from the front; and
- la Figure 5 est une vue de détail agrandie, illustrant le premier ressort, vu de dessus.- Figure 5 is an enlarged detail view, illustrating the first spring, seen from above.
L'invention concerne de façon générale les freins à disque à étrier coulissant destinés à équiper les véhicules automobiles.The invention relates generally to sliding caliper disc brakes intended to equip motor vehicles.
De tels freins comprennent essentiellement un premier support 1, appelé "chape", fixe par rapport au véhicule, un étrier 2 monté coulissant par rapport à la chape, et des patins 3, 4.Such brakes essentially comprise a first support 1, called "clevis", fixed relative to the vehicle, a caliper 2 mounted to slide relative to the clevis, and pads 3, 4.
Chaque patin présente des premier et second bords 3a, 3b, 4a, 4b sensiblement verticaux et une zone centrale 3c, 4c recouverte d'une couche de matériau de friction 30, 40 et chaque patin se trouve maintenu dans la chape 1 par l'intermédiaire de ses bords.Each pad has first and second edges 3a, 3b, 4a, 4b substantially vertical and a central zone 3c, 4c covered with a layer of friction material 30, 40 and each pad is held in the yoke 1 by means of of its edges.
Un moteur de frein 5, associé à l'étrier 2, est susceptible d'être actionné pour provoquer l'application des patins sur le disque 6 suivant une première direction relative Dl, sensiblement perpendiculaire au disque et pointant vers lui pour chacun des patins.A brake motor 5, associated with the caliper 2, is capable of being actuated to cause the application of the pads on the disc 6 in a first relative direction Dl, substantially perpendicular to the disc and pointing towards it for each of the pads.
Des moyens élastiques sont en outre prévus pour éloigner du disque 6 un premier au moins des patins, par exemple le patin 3, après l'actionnement du frein.Elastic means are further provided for distancing from the disc 6 at least a first of the pads, for example the pad 3, after actuation of the brake.
Plus précisément, ces moyens élastiques comprennent au moins un premier ressort 7, et de préférence également un second ressort 8, semblable au premier et disposé symétriquement par rapport à lui.
Le premier ressort 7 comporte au moins une première lame 71 s' étendant au moins partiellement dans un plan P (figures 2 et 5) et disposée entre la chape 1 et le premier bord 3a du premier patin 3, cette première lame présentant (figure 4) un bord externe 71a et un bord interne 71b tous deux sensiblement parallèles au disque 6.More specifically, these elastic means comprise at least a first spring 7, and preferably also a second spring 8, similar to the first and arranged symmetrically with respect to it. The first spring 7 comprises at least a first blade 71 extending at least partially in a plane P (Figures 2 and 5) and disposed between the yoke 1 and the first edge 3a of the first shoe 3, this first blade having (Figure 4 ) an outer edge 71a and an inner edge 71b both substantially parallel to the disc 6.
Le bord interne 71b est plus proche du disque que le bord externe 71a, et la distance L entre ces bords, qui détermine la largeur de la lame 71, est au moins égale à la course qu'effectue le premier patin par rapport à la chape entre la position la plus éloignée du disque, qu'il occupe lorsqu'il est neuf alors que le frein est au repos, et la position la plus proche du disque, qu'il occupe lorsqu'il est usagé alors que le frein est actionné.The internal edge 71b is closer to the disc than the external edge 71a, and the distance L between these edges, which determines the width of the blade 71, is at least equal to the stroke made by the first shoe relative to the yoke between the position furthest from the disc, which it occupies when it is new while the brake is at rest, and the position closest to the disc, which it occupies when it is used while the brake is applied .
Grâce à ces dispositions, le bord 3a du patin 3 se trouve toujours en appui sur la lame 71.Thanks to these arrangements, the edge 3a of the shoe 3 is always supported on the blade 71.
Comme le montrent les figures 4 et 5, la première lame 71 comporte au moins une première languette flexible 710 qui est reliée à son bord externe 71a et qui, à distance de ce bord, présente une section utile dont une première partie 710a pointe vers le disque.As shown in FIGS. 4 and 5, the first blade 71 comprises at least one first flexible tongue 710 which is connected to its external edge 71a and which, at a distance from this edge, has a useful section of which a first part 710a points towards the disk.
Selon l'invention, cette section utile comprend une seconde partie 710b qui constitue une extrémité libre pour la première languette 710, qui forme avec la première partie 710a un angle A grâce auquel elle pointe vers la zone centrale 3c du premier patin 3, et qui s'appuie sur le bord 30a de la couche de matériau de friction portée par ce patin.According to the invention, this useful section comprises a second part 710b which constitutes a free end for the first tab 710, which forms with the first part 710a an angle A thanks to which it points towards the central zone 3c of the first shoe 3, and which rests on the edge 30a of the layer of friction material carried by this pad.
Dans ces conditions, l'extrémité libre 710b de la languette 710 exerce sur le bord 30a de la couche de matériau de friction 30 de ce patin une force dont une première composante est orientée suivant une direction D2, inverse de la première direction relative Dl (figure 5), et qui permet un recul satisfaisant du patin, et une seconde composante, orientée vers la zone centrale 3c du premier patin, et qui évite les bruits occasionnés par les chocs entre ce patin et la chape.Under these conditions, the free end 710b of the tongue 710 exerts on the edge 30a of the layer of friction material 30 of this shoe a force, a first component of which is oriented in a direction D2, inverse to the first relative direction Dl ( Figure 5), and which allows a satisfactory recoil of the skate, and a second component, oriented towards the central zone 3c of the first skate, and which avoids noise caused by impacts between this skate and the yoke.
De préférence, un second ressort 8, semblable au premier ressort 7, porte une seconde
lame non visible mais semblable à la première lame 71, disposée entre la chape et le second bord 3b du premier patin 3 et présentant au moins une seconde languette elle-même non visible mais semblable à la première languette 710.Preferably, a second spring 8, similar to the first spring 7, carries a second blade not visible but similar to the first blade 71, disposed between the yoke and the second edge 3b of the first shoe 3 and having at least one second tongue itself not visible but similar to the first tongue 710.
Comme le comprendra l'homme de l'art, les première et seconde lames précédemment décrites sont donc symétriques par rapport au plan perpendiculaire au disque 6, passant par son axe, et identifié par sa trace Q, visible sur la figure 1.As will be understood by those skilled in the art, the first and second blades previously described are therefore symmetrical with respect to the plane perpendicular to the disc 6, passing through its axis, and identified by its trace Q, visible in FIG. 1.
De même, le premier ressort porte de préférence une troisième lame 73 symétrique de la première lame 71 par rapport au plan médian du disque 6, dont la trace sur la figure 1 est confondu avec la ligne II-II, la troisième lame étant réunie à la première par une jonction 70 formant partie intégrante du ressort 7.Similarly, the first spring preferably carries a third blade 73 symmetrical with the first blade 71 with respect to the median plane of the disc 6, the trace of which in FIG. 1 coincides with the line II-II, the third blade being joined to the first by a junction 70 forming an integral part of the spring 7.
Enfin, le second ressort 8 porte lui-même une quatrième lame, symétrique de la seconde lame par rapport au plan médian du disque 6, ces troisième et quatrième lames, telles que 73, agissant au voisinage des premier et second bords respectifs, tels que 40a, de la couche de matériau de friction 40 du second patin 4.Finally, the second spring 8 itself carries a fourth blade, symmetrical with the second blade with respect to the median plane of the disc 6, these third and fourth blades, such as 73, acting in the vicinity of the respective first and second edges, such that 40a, of the layer of friction material 40 of the second shoe 4.
Chaque ressort est par exemple réalisé en acier inoxydable et présente au moins un profil d'accrochage tel que 75 (figures 2 et 3) permettant de le maintenir en place sur la chape 1.
Each spring is for example made of stainless steel and has at least one attachment profile such as 75 (FIGS. 2 and 3) making it possible to hold it in place on the yoke 1.
Claims
1. Frein à disque pour véhicule automobile, comprenant une chape (1), des premier et second patins (3, 4) dont chacun présente des premier et second bords (3a, 3b, 4a, 4b) sensiblement verticaux et une zone centrale (3c, 4c) recouverte d'une couche de matériau de friction (30, 40), chaque patin se trouvant maintenu par la chape (1) au voisinage de ses bords, un étrier (2) monté coulissant par rapport à la chape, un moteur de frein (5) associé à l'étrier (2) et susceptible d'être actionné pour provoquer l'application des patins sur le disque (6) suivant une première direction relative (Dl) sensiblement perpendiculaire au disque et pointant vers lui, et des moyens élastiques (7, 8) pour éloigner du disque le premier au moins des patins après l'actionnement du frein, ces moyens élastiques comprenant au moins un premier ressort (7) comportant au moins une première lame (71) s'étendant au moins partiellement dans un plan (P) et disposée entre la chape (1) et le premier bord (3a) du premier patin, cette première lame présentant un bord externe (71a) et un bord interne (71b) sensiblement parallèles au disque, dont le second (71b) est plus proche du disque que le premier (71a), et qui sont éloignés l'un de l'autre d'une distance (L) au moins égale à une distance séparant deux positions extrêmes que le premier patin peut adopter par rapport à la chape, cette première lame (71) comportant au moins une première languette flexible (710) qui est reliée à son bord externe (71a) et qui, à distance de ce bord, présente une section utile dont une première partie au moins (710a) pointe vers le disque (6), caractérisé en ce que cette section utile comprend une seconde partie (710b) qui constitue une extrémité libre pour la première languette, qui forme avec la première partie un angle (A) grâce auquel elle pointe vers la zone centrale (30c) du premier patin, et qui s'appuie sur le bord (30a) de la couche de matériau de friction portée par ce patin.1. Disc brake for a motor vehicle, comprising a yoke (1), first and second pads (3, 4) each of which has first and second edges (3a, 3b, 4a, 4b) substantially vertical and a central zone ( 3c, 4c) covered with a layer of friction material (30, 40), each shoe being held by the yoke (1) in the vicinity of its edges, a stirrup (2) mounted to slide relative to the yoke, a brake motor (5) associated with the caliper (2) and capable of being actuated to cause the application of the pads on the disc (6) in a first relative direction (Dl) substantially perpendicular to the disc and pointing towards it, and elastic means (7, 8) for moving the first at least of the pads away from the disc after the brake has been actuated, these elastic means comprising at least one first spring (7) comprising at least one first blade (71) extending at least partially in a plane (P) and arranged between the yoke (1) and the first b ord (3a) of the first shoe, this first blade having an outer edge (71a) and an inner edge (71b) substantially parallel to the disc, the second (71b) of which is closer to the disc than the first (71a), and which are distant from each other by a distance (L) at least equal to a distance separating two extreme positions that the first shoe can adopt relative to the yoke, this first blade (71) comprising at least a first tongue flexible (710) which is connected to its outer edge (71a) and which, at a distance from this edge, has a useful section of which at least a first part (710a) points towards the disc (6), characterized in that this section useful includes a second part (710b) which constitutes a free end for the first tongue, which forms with the first part an angle (A) by which it points towards the central zone (30c) of the first shoe, and which rests on the edge (30a) of the layer of friction material carried by this skate.
2. Frein à disque suivant la revendication 1, caractérisé en ce qu'il comprend une seconde lame semblable à la première, disposée entre la chape (1) et le second bord (3b) du premier patin (3) et présentant au moins une seconde languette semblable à la première.2. Disc brake according to claim 1, characterized in that it comprises a second blade similar to the first, disposed between the yoke (1) and the second edge (3b) of the first shoe (3) and having at least one second tab similar to the first.
3. Frein à disque suivant la revendication 2, caractérisé en ce que les première et seconde lames sont portées par des premier et second ressorts respectifs (7, 8). 3. Disc brake according to claim 2, characterized in that the first and second blades are carried by respective first and second springs (7, 8).
4. Frein à disque suivant la revendication 3, caractérisé en ce que les premier et second ressorts (7, 8) portent repectivement des troisième et quatrième lames (73) semblables aux deux premières (71) et agissant respectivement au voisinage des premier et second bords (4a, 4b) du second patin (4).4. Disc brake according to claim 3, characterized in that the first and second springs (7, 8) respectively carry third and fourth blades (73) similar to the first two (71) and acting respectively in the vicinity of the first and second edges (4a, 4b) of the second shoe (4).
5. Frein à disque suivant l'une quelconque des revendications précédentes, caractérisé en ce que chaque ressort (7, 8) présente au moins un profil d'accrochage (75) permettant de le rendre solidaire de la chape (1).5. Disc brake according to any one of the preceding claims, characterized in that each spring (7, 8) has at least one attachment profile (75) making it possible to make it integral with the yoke (1).
6. Frein à disque suivant la revendication 5, caractérisé en ce que chaque ressort (7, 8) est réalisé en acier inoxydable. 6. Disc brake according to claim 5, characterized in that each spring (7, 8) is made of stainless steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITTO94A000435 | 1994-05-27 | ||
| IT94TO000435A IT1266842B1 (en) | 1994-05-27 | 1994-05-27 | DISC BRAKE WITH SIDE SPRING FOR THE IMPROVED SHOE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995033141A1 true WO1995033141A1 (en) | 1995-12-07 |
Family
ID=11412562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1995/001490 WO1995033141A1 (en) | 1994-05-27 | 1995-04-20 | Disc brake with improved shoe side spring |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT1266842B1 (en) |
| WO (1) | WO1995033141A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB953323A (en) * | 1959-07-23 | 1964-03-25 | Girling Ltd | Brake lining retraction means |
| US3721322A (en) * | 1971-05-17 | 1973-03-20 | T Thompson | Self-compensating disc brake apparatus |
| GB2013292A (en) * | 1978-01-23 | 1979-08-08 | Sumitomo Electric Industries | Disc brake apparatus for a motor vehicle |
| GB2079878A (en) * | 1980-06-23 | 1982-01-27 | Tokico Ltd | Disc brake |
| JPS58142038A (en) * | 1982-02-19 | 1983-08-23 | Akebono Brake Ind Co Ltd | Shoe return mechanism for disc brake |
| US4422534A (en) * | 1979-11-20 | 1983-12-27 | Tokico Ltd. | Disc brake |
-
1994
- 1994-05-27 IT IT94TO000435A patent/IT1266842B1/en active IP Right Grant
-
1995
- 1995-04-20 WO PCT/EP1995/001490 patent/WO1995033141A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB953323A (en) * | 1959-07-23 | 1964-03-25 | Girling Ltd | Brake lining retraction means |
| US3721322A (en) * | 1971-05-17 | 1973-03-20 | T Thompson | Self-compensating disc brake apparatus |
| GB2013292A (en) * | 1978-01-23 | 1979-08-08 | Sumitomo Electric Industries | Disc brake apparatus for a motor vehicle |
| US4422534A (en) * | 1979-11-20 | 1983-12-27 | Tokico Ltd. | Disc brake |
| GB2079878A (en) * | 1980-06-23 | 1982-01-27 | Tokico Ltd | Disc brake |
| JPS58142038A (en) * | 1982-02-19 | 1983-08-23 | Akebono Brake Ind Co Ltd | Shoe return mechanism for disc brake |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 7, no. 261 (M - 257) 19 November 1983 (1983-11-19) * |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1266842B1 (en) | 1997-01-21 |
| ITTO940435A0 (en) | 1994-05-27 |
| ITTO940435A1 (en) | 1995-11-27 |
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