WO2014091105A1 - Bicycle braking system - Google Patents
Bicycle braking system Download PDFInfo
- Publication number
- WO2014091105A1 WO2014091105A1 PCT/FR2013/052815 FR2013052815W WO2014091105A1 WO 2014091105 A1 WO2014091105 A1 WO 2014091105A1 FR 2013052815 W FR2013052815 W FR 2013052815W WO 2014091105 A1 WO2014091105 A1 WO 2014091105A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stirrup
- cleat
- movable member
- braking
- spring
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
- B62L1/00—Brakes; Arrangements thereof
- B62L1/02—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
- B62L1/06—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
- B62L1/10—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis
- B62L1/14—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis the elements being mounted on levers pivotable about different axes
Definitions
- the invention relates to a braking system for a bicycle and a bicycle equipped with such a braking system.
- V-brake There are known braking systems called “V-brake”, which comprise two brackets each equipped with a pad and a mounting sleeve on a bracket integral with the frame of the bike to be arranged on either side of a wheel with the pads facing respectively one side of the rim of said wheel.
- the stirrups are connected to a brake cable to be moved, under the effect of a traction exerted on said cable by the cyclist when he actuates a brake lever disposed on the handlebar, in axial rotation according to a braking stroke, and this from a position apart in which the pads are at a distance from the rim to a close braking position in which said pads are in contact with said rim.
- the stirrups are constrained in the spaced apart position by at least one spring and the lever is held at rest by tensioning the cable by means of the spring, the actuation of said lever making it possible to exert a traction force which is greater than the return force of the spring to move the calipers to the close position of braking.
- these braking systems require a certain number of adjustments, in particular during their assembly on a bicycle at the factory or following the change of the wheel, or during the period of use of said bicycle, particularly with regard to wear skates.
- each caliper is equipped with a stress spring and comprises a screw for adjusting the tension of said spring, said screw being in particular disposed on the lower end of said stirrup.
- each caliper is equipped with a stress spring and comprises a screw for adjusting the tension of said spring, said screw being in particular disposed on the lower end of said stirrup.
- US-5,788,020 discloses a stirrup of such a braking system.
- the balance of the springs is sensitive to poorly controlled parameters, including the friction of the sleeves on the cleats, the routing and the deformation of the brake sheath, so that said balance is easily broken during the use of the bike and the balancing operation must be frequently repeated.
- the balancing has not been correctly performed, one of the pads is permanently in contact with the rim of the wheel, which causes premature wear and generates an annoying noise.
- the adjustment screw is not very visible for the cyclist, and the balancing of the springs appears therefore not very intuitive.
- document EP-1 140 609 discloses a braking system in which each stirrup is provided with an adjustment assembly of its braking stroke comprising a friction element interposed between said stirrup and the amount of the bicycle to allow movement of said caliper relative to said amount.
- the document EP-1 140 609 provides for mounting a voltage adjusting device around the braking cable, this device being particularly complex.
- the invention aims to improve the prior art by proposing in particular a braking system which is arranged to present a balance of springs which is easily achievable during assembly and which is maintained in time automatically, in particular according to the skate wear.
- the invention proposes a braking system arranged to maintain a good tension of the braking cable without requiring the use of complex technical means.
- the invention provides a bicycle braking system comprising two brackets each equipped with a shoe and a mounting sleeve on a batten integral with the frame of the bicycle to be arranged on both sides. another of a wheel with the pads facing respectively one side of the rim of said wheel, said sleeves being arranged to allow the displacement in axial rotation of the stirrups on the batten in a braking stroke defined between a spaced apart position and a close position, each of said stirrups being equipped with a biasing spring of said stirrup in the spaced apart position, one of the stirrups being provided with an adjustment assembly of its braking stroke comprising a movable member mounted in axial rotation on the one of the sleeve and the cleat via a device for constraining said rotation, said device being arranged to exert a force of immobilization of the movable member which is greater than the force exerted by the spring equipping said stirrup, said assembly further comprising a fixed member intended
- the invention proposes a bicycle comprising a frame which has two uprights between which a wheel is mounted, each upright comprising a cleat on which is mounted the sleeve of respectively a stirrup of such a braking system, said bicycle.
- a braking cable connected to the callipers for pulling said cable over a braking stroke from a remote position, wherein the skids are spaced from the rim, to a close position of braking, wherein said pads are in contact with said rim, each yoke being biased back into position by a spring, a first stop being arranged to define the position away from the caliper equipped with the adjustment assembly when the finger is resting on it, the second stop serving to move the movable member under the effect of a displacement of the stirrup with a force greater than the immobilization force said movable member exerted by the constraint device.
- FIG. 1 shows in perspective partially exploded a stirrup provided with an adjustment assembly of a braking system according to one embodiment of the invention
- Figures 2 show the stirrup of Figure 1 mounted on the batten, respectively in longitudinal section (Figure 2a) and in bottom view without the spring flange (Figure 2b);
- Figure 3 shows in perspective the stirrup of Figure 1 with the constraint device and the movable member in partial exploded view, Figure 3a showing in longitudinal section the caliper of Figure 3 in the assembled state;
- FIG. 4 schematically show the adjustment steps of the stirrups of a braking system according to another embodiment of the invention during their mounting on either side of a bicycle wheel;
- FIG. 5 schematically show the adjustment of the braking stroke of the stirrups of Figures 4 during the use of the bicycle.
- the bicycle comprises a frame which has two uprights between which a wheel 1 is mounted and the braking system comprises two brackets 2, each amount comprising a cleat 3 on which is mounted respectively a stirrup 2.
- the braking system can be mounted on the amounts of a fork mounted at the front of the frame of the bike, with the stirrups 2 arranged on both sides. other of the front wheel, or on the rear stays of said frame, with the stirrups 2 arranged on either side of the rear wheel.
- the stirrups 2 are each equipped with a pad 4 and a sleeve 5 for mounting on a cleat 3 to be arranged on either side of the wheel 1 with the pads 4 facing respectively one side of the rim of said wheel.
- each stirrup 2 comprises a piece 6 for mounting a pad 4, said piece comprising a vertical slot 7 in which the base of said pad is mounted by means of a screw 8.
- vertical position of the pad 4 can be adjusted by loosening the screw 8 and sliding the base of said pad in the slot 7, before tightening the screw 8 once the desired position obtained.
- the cyclist loosens the screw 8 and removes the base of the slot 7.
- each stirrup 2 comprises a lower end 2a equipped with a sleeve 5, said end being provided with a bore in which said sleeve is crimped. Furthermore, the sleeve 5 is disposed around the cleat 3 with the stirrup 2 disposed on the side of the distal end 3a of the cleat 3, said stirrup being fixed axially on said cleat by means of a clamping screw 9 mounted in said cleat, the screw 9 having a head 9a disposed in abutment on the outer face of said stirrup.
- the sleeves 5 are arranged to allow the displacement in axial rotation of the stirrups 2 on respectively a cleat 3 according to a braking stroke defined between a spaced apart position (FIGS. 4c, 5c), in which the runners 4 are spaced from the rim of the wheel. 1, and a close position ( Figures 4b, 5b), wherein said pads are in contact with said rim.
- the cleat 3 comprises a cavity formed on its outer periphery extending axially from the distal end 3a. said batten and over a portion of the length of said batten, the sleeve 5 being rotatably mounted around said print.
- the bicycle comprises a braking cable which is connected to the stirrups 2 during assembly of said system, each stirrup 2 comprising an upper end 2b equipped with a device 10 for connection to said cable.
- the cyclist presses the brake lever disposed on its handlebar and corresponding to the wheel 1 that it wishes to immobilize, so as to exert traction on the cable and drive the stirrups 2 of said system to their close position of braking.
- each of said stirrups is equipped with a spring 1 1 stress of said stirrup in the spread position.
- the springs January 1 allow the return of the handle in the rest position and the tensioning of the brake cable.
- each spring 1 1 comprises a helical body 1 1 mounted around the sleeve 5.
- the helical body 1 1 a is extended by an upper rod 1 1 b held in position on a lug 12 of the caliper 2, as well as by an axial rod 1 1 c intended to be fixed to the cleat 3.
- Each yoke 2 comprises a flange 13 in which the helical body 11a is disposed, said flange having a groove of which the axial rod 1 1c is projecting.
- the batten 3 comprises a proximal end provided with a flange 3b, said flange having an orifice in which the axial rod 11c is fixed.
- the axial dimension of the cleat 3 is greater than the axial length of the sleeve 5, the axial dimension of said sleeve being substantially equal to the axial dimension of the cavity in which it is arranged.
- the flange 13 is mounted around the part of the span of the cleat 3 which is not provided with the imprint, which avoids the rotational drive of said flange by the sleeve 5.
- one of the stirrups 2 is provided with a set of adjustment of its braking stroke.
- the adjustment assembly comprises a movable member 14 mounted in axial rotation on the sleeve 5 by means of a constraint of said rotation which is arranged to exert a force of immobilization of the movable member 14 greater than the force exerted by the spring 1 1 equipping the yoke 2.
- the constraint device comprises at least one friction element 15 interposed between the movable member 14 and the stirrup 2.
- the movable member 14 comprises a washer disposed around the sleeve 5 and the friction element comprises two friction washers 15 disposed around the sleeve 5 and on either side of said movable member.
- the constraint device comprises a spring washer 16 and a clamping washer 17 mounted on the sleeve 5 and between which are arranged the movable member 14 and the friction washers 15, the spring washer 16 to ensure the pressure axial on said movable member and said friction washers 15 being held compressed by the clamping washer 17.
- the adjustment assembly comprises a fixed member 18 intended to be secured to the cleat 3.
- the fixed member 18 comprises a radial lug 18a which has an assembly port to the cleat 3 via a screw mounted in said cleat.
- the radial lug 18a of the fixed member 18 is interposed, during assembly of the yoke 2 on the cleat 3, between the head 9a of the mounting screw 9 and the outer face said stirrup, and this so as to be pressed against the distal end 3a of said cleat by means of said head.
- the movable member 14 and its constraint device are arranged around the sleeve 5 by being interposed between the fixed member 18 and the flange 13 of the spring 1 1, said flange further comprising at least one housing in which said members are partially arranged, in particular for aesthetic purposes.
- one of the members 14, 18 has a finger 19 and the other member 18, 14 forms two stops 20 to define a relative angular displacement stroke of said members.
- the finger 19 extends radially from the washer of the movable member 14 and the fixed member 18 forms the stops 20.
- the fixed member 18 comprises two axial tabs 18b respectively defining a stop 20a, 20b, the finger 19 of the movable member 14 being disposed between said tabs.
- the movable member 14 comprises a washer mounted in axial rotation on the cleat 3 and of which the finger 19 extends radially.
- the fixed member 18 is secured to the stirrup 2 to move in rotation with it relative to the cleat 3 and comprises an inner stop 20a intended to be disposed near the wheel 1 when said stirrup is mounted on a the amount of the bicycle, and an outer stop 20b to be disposed at a distance from said wheel.
- the technical characteristics of the constraint device and the fixed member 18 described in relation with FIGS. 1 to 3 may be adapted to the assemblies of the movable member 14 and of said fixed member respectively on the cleat 3 and on the stirrup 2.
- the movable member 14 may comprise the two stops 20a, 20b while being mounted in axial rotation on one of the sleeve 5 and the cleat 3, while the fixed member 18 may comprise the finger 19 while being secured to the other among the cleat 3 and the sleeve 5.
- the stops 20a, 20b are arranged so that a first stop defines the spaced apart position of the stirrup 2 provided with the adjustment assembly when the finger 19 bears on it.
- the inner stop 20a fulfills this function.
- the immobilization force exerted by the constraint device on the movable member 14 prevents any additional movement towards the outside of said movable member, and therefore of the stirrup 2, so that the pad 4 equipping said stirrup will deviate from the rim only by the distance corresponding to the spaced apart position, and the pad 4 fitted to the other stirrup 2 will not approach the rim at beyond this distance.
- the force of the spring 1 1 equipping the yoke 2 provided with the adjustment assembly is greater than the force of the spring 1 1 equipping the other yoke 2, so that the position spaced from the two calipers 2 is obtained only by pressing on the inner stop 20a, and it is not necessary to manually balance the springs 1 January.
- the force of the spring 1 1 equipping the other arm 2 constantly stretches the brake cable without requiring manual adjustment of said voltage.
- the second stop of the adjustment assembly serves to move the movable member 14 relative to the sleeve 5 by exerting on the stirrup 2 a force greater than the immobilization force exerted on said movable member by the constraint device, for example by moving said stirrup manually (when mounting the brake system on the bike) or by means of the brake lever (when using the bicycle).
- the outer stop 20a fulfills this function.
- each of said stirrups is biased into the spaced position by a spring January 1, and until the finger 19 comes into contact with the inner stopper 20a, the immobilization force the constraint device then preventing any further movement of the stirrups 2 outwards (Figure 4c).
- the pads 4 wear out, the distance between each of said pads and the rim increases.
- the cyclist exerts a displacement force on the stirrups 2 by pressing on the brake lever until the finger 19 comes into contact with the stop 20b external adjustment ( Figures 5a, 5b).
- the angular difference between the abutments 20a, 20b is substantially equal to the braking stroke of the yoke 2 provided with the adjustment assembly.
- the system ensures that the pads 4 are never in contact with the rim at rest.
- the braking system according to the invention makes it possible to save time during assembly of the bicycle, especially at the factory or while reassembling a wheel, while reducing the maintenance and adjustment operations to be carried out for the cyclist as and when using the bicycle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention concerns a braking system comprising two stirrups (2) each fitted with a sleeve (5) for assembly on a cleat (3), said sleeves being arranged to allow the stirrups (2) to move in axial rotation along a braking stroke defined between a spaced-apart position and a close position, each stirrup (2) being provided with a biasing spring (11) in the spaced-apart position, one of the stirrups (2) being provided with an assembly for adjusting the braking stroke thereof, which comprises a mobile member (14) mounted in axial rotation via a biasing device arranged to exert an immobilising force greater than the force exerted by the spring (11), and a fixed member (18), the members (14, 18) having, respectively, a finger (19) and two stops (20a, 20b), one stop (20b) defining the spaced-apart position, the other stop (20a) moving the mobile member (14) by exerting, on the stirrup (2), a force greater than the immobilising force, the force of the spring (11) equipping the stirrup (2) provided with the adjustment assembly being greater than the force of the spring (11) equipping the other stirrup (2).
Description
Système de freinage pour vélo Bike braking system
L'invention concerne un système de freinage pour vélo, ainsi qu'un vélo équipé d'un tel système de freinage. The invention relates to a braking system for a bicycle and a bicycle equipped with such a braking system.
On connaît des systèmes de freinage dits « V-brake », qui comprennent deux étriers équipés chacun d'un patin et d'un manchon de montage sur un tasseau solidaire du cadre du vélo pour être disposés de part et d'autre d'une roue avec les patins en regard de respectivement un côté de la jante de ladite roue. There are known braking systems called "V-brake", which comprise two brackets each equipped with a pad and a mounting sleeve on a bracket integral with the frame of the bike to be arranged on either side of a wheel with the pads facing respectively one side of the rim of said wheel.
Dans ces systèmes, les étriers sont raccordés à un câble de freinage pour être déplacés, sous l'effet d'une traction exercée sur ledit câble par le cycliste lorsqu'il actionne une manette de frein disposée sur le guidon, en rotation axiale suivant une course de freinage, et ce depuis une position écartée dans laquelle les patins sont à distance de la jante vers une position rapprochée de freinage dans laquelle lesdits patins sont au contact de ladite jante. In these systems, the stirrups are connected to a brake cable to be moved, under the effect of a traction exerted on said cable by the cyclist when he actuates a brake lever disposed on the handlebar, in axial rotation according to a braking stroke, and this from a position apart in which the pads are at a distance from the rim to a close braking position in which said pads are in contact with said rim.
Par ailleurs, au repos, les étriers sont contraints en position écartée par au moins un ressort et la manette est maintenue au repos par mise en tension du câble au moyen du ressort, l'actionnement de ladite manette permettant d'exercer un effort de traction qui est supérieur à l'effort de rappel du ressort pour déplacer les étriers vers la position rapprochée de freinage. Furthermore, at rest, the stirrups are constrained in the spaced apart position by at least one spring and the lever is held at rest by tensioning the cable by means of the spring, the actuation of said lever making it possible to exert a traction force which is greater than the return force of the spring to move the calipers to the close position of braking.
Pour pouvoir être efficaces, ces systèmes de freinage nécessitent un certain nombre de réglages, notamment durant leur montage sur un vélo en usine ou suite au changement de la roue, ou encore durant la période d'utilisation dudit vélo, notamment relativement à l'usure des patins. In order to be effective, these braking systems require a certain number of adjustments, in particular during their assembly on a bicycle at the factory or following the change of the wheel, or during the period of use of said bicycle, particularly with regard to wear skates.
En particulier, pour pouvoir assurer un jeu fonctionnel correct entre les patins et les jantes de la roue, et donc un freinage efficace, l'équilibrage des ressorts d'un tel système doit être réglé avec soin. Pour ce faire, on connaît des systèmes de freinage dont chaque étrier est équipé d'un ressort de contrainte et comprend une vis de réglage en tension dudit ressort, ladite vis étant
notamment disposée sur l'extrémité inférieure dudit étrier. Par exemple, le document US-5 788 020 décrit un étrier d'un tel système de freinage. In particular, to be able to ensure a correct functional clearance between the pads and the rims of the wheel, and thus effective braking, the balancing of the springs of such a system must be carefully adjusted. To do this, brake systems are known in which each caliper is equipped with a stress spring and comprises a screw for adjusting the tension of said spring, said screw being in particular disposed on the lower end of said stirrup. For example, US-5,788,020 discloses a stirrup of such a braking system.
Toutefois, cette opération s'avère particulièrement longue et délicate à réaliser, ce qui peut entraîner des erreurs de montage et donc un refus du vélo lors d'un contrôle qualité effectué en usine. However, this operation is particularly long and difficult to achieve, which can lead to assembly errors and therefore a refusal of the bike during a quality control performed at the factory.
Par ailleurs, l'équilibre des ressorts est sensible à des paramètres mal maîtrisés, notamment la friction des manchons sur les tasseaux, le cheminement et la déformation de la gaine de frein, de sorte que ledit équilibre est facilement rompu durant l'utilisation du vélo et l'opération d'équilibrage doit être fréquemment réitérée. En particulier, lorsque l'équilibrage n'a pas été correctement effectué, un des patins est en permanence au contact de la jante de la roue, ce qui entraîne son usure prématurée et génère un bruit gênant. De plus, la vis de réglage est peu visible pour le cycliste, et l'équilibrage des ressorts apparaît donc peu intuitif. Furthermore, the balance of the springs is sensitive to poorly controlled parameters, including the friction of the sleeves on the cleats, the routing and the deformation of the brake sheath, so that said balance is easily broken during the use of the bike and the balancing operation must be frequently repeated. In particular, when the balancing has not been correctly performed, one of the pads is permanently in contact with the rim of the wheel, which causes premature wear and generates an annoying noise. In addition, the adjustment screw is not very visible for the cyclist, and the balancing of the springs appears therefore not very intuitive.
Pour pallier à ces inconvénients, on connaît du document EP-1 140 609 un système de freinage dans lequel chaque étrier est muni d'un ensemble d'ajustement de sa course de freinage comprenant un élément de friction interposé entre ledit étrier et le montant du vélo pour permettre le déplacement dudit étrier par rapport audit montant. To overcome these drawbacks, document EP-1 140 609 discloses a braking system in which each stirrup is provided with an adjustment assembly of its braking stroke comprising a friction element interposed between said stirrup and the amount of the bicycle to allow movement of said caliper relative to said amount.
Cependant, cette solution génère un problème de tension au niveau du câble de freinage, qui se traduit par l'apparition d'un jeu dans ledit câble au fur et à mesure de l'usure des patins. Pour résoudre ce problème, le document EP- 1 140 609 prévoit de monter un dispositif de réglage en tension autour du câble de freinage, ce dispositif s'avérant particulièrement complexe. L'invention vise à perfectionner l'art antérieur en proposant notamment un système de freinage qui est agencé pour présenter un équilibrage des ressorts qui est facilement réalisable lors du montage et qui est maintenu dans le temps de façon automatique, notamment en fonction de l'usure des patins. Par
ailleurs, l'invention propose un système de freinage agencé pour maintenir une bonne tension du câble de freinage sans nécessiter l'utilisation de moyens techniques complexes. A cet effet, selon un premier aspect, l'invention propose un système de freinage pour vélo comprenant deux étriers équipés chacun d'un patin et d'un manchon de montage sur un tasseau solidaire du cadre du vélo pour être disposés de part et d'autre d'une roue avec les patins en regard de respectivement un côté de la jante de ladite roue, lesdits manchons étant agencés pour permettre le déplacement en rotation axiale des étriers sur le tasseau suivant une course de freinage définie entre une position écartée et une position rapprochée, chacun desdits étriers étant équipé d'un ressort de contrainte dudit étrier en position écartée, l'un des étriers étant muni d'un ensemble d'ajustement de sa course de freinage comprenant un organe mobile monté en rotation axiale sur l'un parmi le manchon et le tasseau par l'intermédiaire d'un dispositif de contrainte de ladite rotation, ledit dispositif étant agencé pour exercer un effort d'immobilisation de l'organe mobile qui est supérieur à l'effort exercé par le ressort équipant ledit étrier, ledit ensemble comprenant en outre un organe fixe destiné à être solidarisé à l'autre parmi le tasseau et le manchon, un organe présentant un doigt et l'autre organe formant deux butées pour définir une course de déplacement angulaire relative desdits organes, une première butée définissant la position écartée dudit étrier lorsque le doigt est en appui sur elle, la deuxième butée servant à déplacer l'organe mobile en exerçant sur l'étrier un effort supérieur à l'effort d'immobilisation dudit organe mobile, l'effort du ressort équipant l'étrier muni de l'ensemble d'ajustement étant supérieur à l'effort du ressort équipant l'autre étrier. However, this solution generates a tension problem in the brake cable, which results in the appearance of a game in said cable as and when the pads wear. To solve this problem, the document EP-1 140 609 provides for mounting a voltage adjusting device around the braking cable, this device being particularly complex. The invention aims to improve the prior art by proposing in particular a braking system which is arranged to present a balance of springs which is easily achievable during assembly and which is maintained in time automatically, in particular according to the skate wear. By Moreover, the invention proposes a braking system arranged to maintain a good tension of the braking cable without requiring the use of complex technical means. For this purpose, according to a first aspect, the invention provides a bicycle braking system comprising two brackets each equipped with a shoe and a mounting sleeve on a batten integral with the frame of the bicycle to be arranged on both sides. another of a wheel with the pads facing respectively one side of the rim of said wheel, said sleeves being arranged to allow the displacement in axial rotation of the stirrups on the batten in a braking stroke defined between a spaced apart position and a close position, each of said stirrups being equipped with a biasing spring of said stirrup in the spaced apart position, one of the stirrups being provided with an adjustment assembly of its braking stroke comprising a movable member mounted in axial rotation on the one of the sleeve and the cleat via a device for constraining said rotation, said device being arranged to exert a force of immobilization of the movable member which is greater than the force exerted by the spring equipping said stirrup, said assembly further comprising a fixed member intended to be secured to the other one of the cleat and the sleeve, a member having a finger and the other member forming two stops for defining a relative angular displacement stroke of said members, a first stop defining the spaced apart position of said stirrup when the finger is resting on it, the second stop serving to move the movable member by exerting on the stirrup a greater effort to the effort of immobilization of said movable member, the force of the spring equipping the stirrup provided with the adjustment assembly being greater than the force of the spring equipping the other stirrup.
Selon un deuxième aspect, l'invention propose un vélo comprenant un cadre qui présente deux montants entre lesquels une roue est montée, chaque montant comprenant un tasseau sur lequel est monté le manchon de respectivement un étrier d'un tel système de freinage, ledit vélo comprenant un câble de freinage raccordé aux étriers afin de les entraîner par traction dudit câble sur une course de freinage depuis une position écartée, dans laquelle les
patins sont écartés de la jante, vers une position rapprochée de freinage, dans laquelle lesdits patins sont au contact de ladite jante, chaque étrier étant rappelé en position écartée par un ressort, une première butée étant agencée pour définir la position écartée de l'étrier équipé de l'ensemble d'ajustement lorsque le doigt est en appui sur elle, la deuxième butée servant à déplacer l'organe mobile sous l'effet d'un déplacement de l'étrier avec un effort supérieur à l'effort d'immobilisation dudit organe mobile exercé par le dispositif de contrainte. D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence aux figures annexées dans lesquelles : According to a second aspect, the invention proposes a bicycle comprising a frame which has two uprights between which a wheel is mounted, each upright comprising a cleat on which is mounted the sleeve of respectively a stirrup of such a braking system, said bicycle. comprising a braking cable connected to the callipers for pulling said cable over a braking stroke from a remote position, wherein the skids are spaced from the rim, to a close position of braking, wherein said pads are in contact with said rim, each yoke being biased back into position by a spring, a first stop being arranged to define the position away from the caliper equipped with the adjustment assembly when the finger is resting on it, the second stop serving to move the movable member under the effect of a displacement of the stirrup with a force greater than the immobilization force said movable member exerted by the constraint device. Other features and advantages of the invention will appear in the description which follows, made with reference to the appended figures in which:
- la figure 1 représente en perspective partiellement éclatée un étrier muni d'un ensemble d'ajustement d'un système de freinage selon un mode de réalisation de l'invention ; - Figure 1 shows in perspective partially exploded a stirrup provided with an adjustment assembly of a braking system according to one embodiment of the invention;
- les figures 2 représentent l'étrier de la figure 1 monté sur le tasseau, respectivement en coupe longitudinale (figure 2a) et en vue de dessous sans la bride du ressort (figure 2b) ; - Figures 2 show the stirrup of Figure 1 mounted on the batten, respectively in longitudinal section (Figure 2a) and in bottom view without the spring flange (Figure 2b);
- la figure 3 représente en perspective l'étrier de la figure 1 avec le dispositif de contrainte et l'organe mobile en vue partiellement éclatée, la figure 3a représentant en coupe longitudinale l'étrier de la figure 3 à l'état monté ; - Figure 3 shows in perspective the stirrup of Figure 1 with the constraint device and the movable member in partial exploded view, Figure 3a showing in longitudinal section the caliper of Figure 3 in the assembled state;
- les figures 4 représentent schématiquement les étapes de réglage des étriers d'un système de freinage selon un autre mode de réalisation de l'invention lors de leur montage de part et d'autre d'une roue de vélo ; - les figures 5 représentent schématiquement l'ajustement de la course de freinage des étriers des figures 4 durant l'utilisation du vélo. - Figures 4 schematically show the adjustment steps of the stirrups of a braking system according to another embodiment of the invention during their mounting on either side of a bicycle wheel; - Figures 5 schematically show the adjustment of the braking stroke of the stirrups of Figures 4 during the use of the bicycle.
En relation avec ces figures, on décrit ci-dessous un système de freinage pour vélo, ainsi qu'un vélo équipé d'un tel système de freinage. In connection with these figures, there is described below a braking system for a bicycle, and a bicycle equipped with such a braking system.
Le vélo comprend un cadre qui présente deux montants entre lesquels une roue 1 est montée et le système de freinage comprend deux étriers 2, chaque
montant comprenant un tasseau 3 sur lequel est monté respectivement un étrier 2. Par exemple, le système de freinage peut être monté sur les montants d'une fourche montée à l'avant du cadre du vélo, avec les étriers 2 disposés de part et d'autre de la roue avant, ou sur les haubans arrière dudit cadre, avec les étriers 2 disposés de part et d'autre de la roue arrière. The bicycle comprises a frame which has two uprights between which a wheel 1 is mounted and the braking system comprises two brackets 2, each amount comprising a cleat 3 on which is mounted respectively a stirrup 2. For example, the braking system can be mounted on the amounts of a fork mounted at the front of the frame of the bike, with the stirrups 2 arranged on both sides. other of the front wheel, or on the rear stays of said frame, with the stirrups 2 arranged on either side of the rear wheel.
Les étriers 2 sont équipés chacun d'un patin 4 et d'un manchon 5 de montage sur un tasseau 3 pour être disposés de part et d'autre de la roue 1 avec les patins 4 en regard de respectivement un côté de la jante de ladite roue. The stirrups 2 are each equipped with a pad 4 and a sleeve 5 for mounting on a cleat 3 to be arranged on either side of the wheel 1 with the pads 4 facing respectively one side of the rim of said wheel.
En relation avec les figures 1 et 3, chaque étrier 2 comprend une pièce 6 de montage d'un patin 4, ladite pièce comprenant une fente verticale 7 dans laquelle la base dudit patin est montée par l'intermédiaire d'une vis 8. La position verticale du patin 4 peut être réglée en desserrant la vis 8 et en faisant coulisser la base dudit patin dans la fente 7, avant de resserrer la vis 8 une fois la position souhaitée obtenue. Pour changer le patin 4, par exemple lorsque celui-ci est usé, le cycliste desserre la vis 8 et retire la base de la fente 7. In relation with FIGS. 1 and 3, each stirrup 2 comprises a piece 6 for mounting a pad 4, said piece comprising a vertical slot 7 in which the base of said pad is mounted by means of a screw 8. vertical position of the pad 4 can be adjusted by loosening the screw 8 and sliding the base of said pad in the slot 7, before tightening the screw 8 once the desired position obtained. To change the pad 4, for example when it is worn, the cyclist loosens the screw 8 and removes the base of the slot 7.
En relation avec la figure 2a, chaque étrier 2 comprend une extrémité inférieure 2a équipée d'un manchon 5, ladite extrémité étant pourvue d'un alésage dans lequel ledit manchon est serti. Par ailleurs, le manchon 5 est disposé autour du tasseau 3 avec l'étrier 2 disposé du côté de l'extrémité distale 3a du tasseau 3, ledit étrier étant fixé axialement sur ledit tasseau par l'intermédiaire d'une vis de serrage 9 montée dans ledit tasseau, la vis 9 présentant une tête 9a disposée en appui sur la face extérieure dudit étrier. In relation to FIG. 2a, each stirrup 2 comprises a lower end 2a equipped with a sleeve 5, said end being provided with a bore in which said sleeve is crimped. Furthermore, the sleeve 5 is disposed around the cleat 3 with the stirrup 2 disposed on the side of the distal end 3a of the cleat 3, said stirrup being fixed axially on said cleat by means of a clamping screw 9 mounted in said cleat, the screw 9 having a head 9a disposed in abutment on the outer face of said stirrup.
Les manchons 5 sont agencés pour permettre le déplacement en rotation axiale des étriers 2 sur respectivement un tasseau 3 suivant une course de freinage définie entre une position écartée (figures 4c, 5c), dans laquelle les patins 4 sont écartés de la jante de la roue 1 , et une position rapprochée (figures 4b, 5b), dans laquelle lesdits patins sont au contact de ladite jante. Pour ce faire, en relation avec la figure 2a, le tasseau 3 comprend une empreinte formée sur sa périphérie extérieure en s'étendant axialement depuis l'extrémité distale 3a
dudit tasseau et sur une partie de la longueur dudit tasseau, le manchon 5 étant monté en rotation autour de ladite empreinte. The sleeves 5 are arranged to allow the displacement in axial rotation of the stirrups 2 on respectively a cleat 3 according to a braking stroke defined between a spaced apart position (FIGS. 4c, 5c), in which the runners 4 are spaced from the rim of the wheel. 1, and a close position (Figures 4b, 5b), wherein said pads are in contact with said rim. To do this, in relation with FIG. 2a, the cleat 3 comprises a cavity formed on its outer periphery extending axially from the distal end 3a. said batten and over a portion of the length of said batten, the sleeve 5 being rotatably mounted around said print.
Pour permettre l'actionnement du système de freinage, le vélo comprend un câble de freinage qui est raccordé aux étriers 2 durant le montage dudit système, chaque étrier 2 comprenant une extrémité supérieure 2b équipée d'un dispositif 10 de raccordement audit câble. Ainsi, pour actionner le système de freinage, le cycliste appuie sur la manette de frein disposée sur son guidon et correspondant à la roue 1 qu'il souhaite immobiliser, de sorte à exercer une traction sur le câble et entraîner les étriers 2 dudit système vers leur position rapprochée de freinage. To enable the actuation of the braking system, the bicycle comprises a braking cable which is connected to the stirrups 2 during assembly of said system, each stirrup 2 comprising an upper end 2b equipped with a device 10 for connection to said cable. Thus, to actuate the braking system, the cyclist presses the brake lever disposed on its handlebar and corresponding to the wheel 1 that it wishes to immobilize, so as to exert traction on the cable and drive the stirrups 2 of said system to their close position of braking.
Pour rappeler les étriers 2 en position écartée à la fin du freinage, lorsque le cycliste cesse d'appuyer sur la manette de frein, chacun desdits étriers est équipé d'un ressort 1 1 de contrainte dudit étrier en position écartée. En outre, les ressorts 1 1 permettent le retour de la manette en position de repos et la mise en tension du câble de freinage. To recall the stirrups 2 in the separated position at the end of the braking, when the cyclist stops pressing the brake lever, each of said stirrups is equipped with a spring 1 1 stress of said stirrup in the spread position. In addition, the springs January 1 allow the return of the handle in the rest position and the tensioning of the brake cable.
Dans le mode de réalisation représenté, chaque ressort 1 1 comprend un corps hélicoïdal 1 1 a monté autour du manchon 5. Le corps hélicoïdal 1 1 a est prolongé par une tige supérieure 1 1 b maintenue en position sur un ergot 12 de l'étrier 2, ainsi que par une tige axiale 1 1 c destinée à être fixée au tasseau 3. In the embodiment shown, each spring 1 1 comprises a helical body 1 1 mounted around the sleeve 5. The helical body 1 1 a is extended by an upper rod 1 1 b held in position on a lug 12 of the caliper 2, as well as by an axial rod 1 1 c intended to be fixed to the cleat 3.
Chaque étrier 2 comprend une bride 13 dans laquelle le corps hélicoïdal 1 1 a est disposé, ladite bride présentant une rainure de laquelle la tige axiale 1 1 c est saillante. En relation avec la figure 2b, le tasseau 3 comprend une extrémité proximale pourvue d'une collerette 3b, ladite collerette présentant un orifice dans lequel la tige axiale 1 1 c est fixée. En particulier, la dimension axiale du tasseau 3 est supérieure à la longueur axiale du manchon 5, la dimension axiale dudit manchon étant sensiblement égale à la dimension axiale de l'empreinte dans laquelle il est disposé. Par ailleurs, la bride 13 est montée autour de la partie de la portée du tasseau 3 qui
n'est pas munie de l'empreinte, ce qui permet d'éviter l'entraînement en rotation de ladite bride par le manchon 5. Each yoke 2 comprises a flange 13 in which the helical body 11a is disposed, said flange having a groove of which the axial rod 1 1c is projecting. In relation to FIG. 2b, the batten 3 comprises a proximal end provided with a flange 3b, said flange having an orifice in which the axial rod 11c is fixed. In particular, the axial dimension of the cleat 3 is greater than the axial length of the sleeve 5, the axial dimension of said sleeve being substantially equal to the axial dimension of the cavity in which it is arranged. Furthermore, the flange 13 is mounted around the part of the span of the cleat 3 which is not provided with the imprint, which avoids the rotational drive of said flange by the sleeve 5.
Pour éviter un réglage fastidieux et sans garantie d'efficacité de l'équilibre des ressorts 1 1 , l'un des étriers 2 est muni d'un ensemble d'ajustement de sa course de freinage. To avoid a tedious adjustment and without guarantee of efficiency of the balance of the springs January 1, one of the stirrups 2 is provided with a set of adjustment of its braking stroke.
Dans le mode de réalisation représenté sur les figures 1 à 3, l'ensemble d'ajustement comprend un organe mobile 14 monté en rotation axiale sur le manchon 5 par l'intermédiaire d'un dispositif de contrainte de ladite rotation qui est agencé pour exercer un effort d'immobilisation de l'organe mobile 14 supérieur à l'effort exercé par le ressort 1 1 équipant l'étrier 2. En particulier, le dispositif de contrainte comprend au moins un élément de friction 15 interposé entre l'organe mobile 14 et l'étrier 2. In the embodiment shown in Figures 1 to 3, the adjustment assembly comprises a movable member 14 mounted in axial rotation on the sleeve 5 by means of a constraint of said rotation which is arranged to exert a force of immobilization of the movable member 14 greater than the force exerted by the spring 1 1 equipping the yoke 2. In particular, the constraint device comprises at least one friction element 15 interposed between the movable member 14 and the stirrup 2.
En particulier, l'organe mobile 14 comprend une rondelle disposée autour du manchon 5 et l'élément de friction comprend deux rondelles de friction 15 disposées autour du manchon 5 et de part et d'autre dudit organe mobile. De plus, le dispositif de contrainte comprend une rondelle élastique 16 et une rondelle de serrage 17 montées sur le manchon 5 et entre lesquelles sont disposés l'organe mobile 14 et les rondelles de friction 15, la rondelle élastique 16 permettant d'assurer la pression axiale sur ledit organe mobile et lesdites rondelles de friction 15 en étant maintenue comprimée par la rondelle de serrage 17. In particular, the movable member 14 comprises a washer disposed around the sleeve 5 and the friction element comprises two friction washers 15 disposed around the sleeve 5 and on either side of said movable member. In addition, the constraint device comprises a spring washer 16 and a clamping washer 17 mounted on the sleeve 5 and between which are arranged the movable member 14 and the friction washers 15, the spring washer 16 to ensure the pressure axial on said movable member and said friction washers 15 being held compressed by the clamping washer 17.
En outre, l'ensemble d'ajustement comprend un organe fixe 18 destiné à être solidarisé au tasseau 3. Pour ce faire, l'organe fixe 18 comprend une patte radiale 18a qui présente un orifice d'association au tasseau 3 par l'intermédiaire d'une vis montée dans ledit tasseau. En particulier, dans le mode de réalisation représenté, la patte radiale 18a de l'organe fixe 18 est interposée, lors du montage de l'étrier 2 sur le tasseau 3, entre la tête 9a de la vis 9 de montage et la face extérieure dudit étrier, et ce de manière à être plaquée contre l'extrémité distale 3a dudit tasseau au moyen de ladite tête.
Ainsi, l'organe mobile 14 et son dispositif de contrainte sont disposés autour du manchon 5 en étant interposés entre l'organe fixe 18 et la bride 13 du ressort 1 1 , ladite bride comprenant en outre au moins un logement dans lequel lesdits organes sont disposés partiellement, notamment à des fins esthétiques. In addition, the adjustment assembly comprises a fixed member 18 intended to be secured to the cleat 3. To do this, the fixed member 18 comprises a radial lug 18a which has an assembly port to the cleat 3 via a screw mounted in said cleat. In particular, in the embodiment shown, the radial lug 18a of the fixed member 18 is interposed, during assembly of the yoke 2 on the cleat 3, between the head 9a of the mounting screw 9 and the outer face said stirrup, and this so as to be pressed against the distal end 3a of said cleat by means of said head. Thus, the movable member 14 and its constraint device are arranged around the sleeve 5 by being interposed between the fixed member 18 and the flange 13 of the spring 1 1, said flange further comprising at least one housing in which said members are partially arranged, in particular for aesthetic purposes.
Par ailleurs, un des organes 14, 18 présente un doigt 19 et l'autre organe 18, 14 forme deux butées 20 pour définir une course de déplacement angulaire relative desdits organes. Sur les figures 1 à 3, le doigt 19 s'étend radialement depuis la rondelle de l'organe mobile 14 et l'organe fixe 18 forme les butées 20. En particulier, l'organe fixe 18 comprend deux pattes axiales 18b définissant respectivement une butée 20a, 20b, le doigt 19 de l'organe mobile 14 étant disposé entre lesdites pattes. Dans le mode de réalisation représenté sur les figures 4 et 5, l'organe mobile 14 comprend une rondelle montée en rotation axiale sur le tasseau 3 et de laquelle le doigt 19 s'étend radialement. En outre, l'organe fixe 18 est solidarisé à l'étrier 2 pour se déplacer en rotation avec lui par rapport au tasseau 3 et comprend une butée intérieure 20a destinée à être disposée à proximité de la roue 1 lorsque ledit étrier est monté sur un montant du vélo, ainsi qu'une butée extérieure 20b destinée à être disposée à distance de ladite roue. Moreover, one of the members 14, 18 has a finger 19 and the other member 18, 14 forms two stops 20 to define a relative angular displacement stroke of said members. In FIGS. 1 to 3, the finger 19 extends radially from the washer of the movable member 14 and the fixed member 18 forms the stops 20. In particular, the fixed member 18 comprises two axial tabs 18b respectively defining a stop 20a, 20b, the finger 19 of the movable member 14 being disposed between said tabs. In the embodiment shown in Figures 4 and 5, the movable member 14 comprises a washer mounted in axial rotation on the cleat 3 and of which the finger 19 extends radially. In addition, the fixed member 18 is secured to the stirrup 2 to move in rotation with it relative to the cleat 3 and comprises an inner stop 20a intended to be disposed near the wheel 1 when said stirrup is mounted on a the amount of the bicycle, and an outer stop 20b to be disposed at a distance from said wheel.
Par ailleurs, les caractéristiques techniques du dispositif de contrainte et de l'organe fixe 18 décrites en relation avec les figures 1 à 3 peuvent être adaptées aux montages de l'organe mobile 14 et dudit organe fixe respectivement sur le tasseau 3 et sur l'étrier 2. Furthermore, the technical characteristics of the constraint device and the fixed member 18 described in relation with FIGS. 1 to 3 may be adapted to the assemblies of the movable member 14 and of said fixed member respectively on the cleat 3 and on the stirrup 2.
Selon des variantes non représentées, l'organe mobile 14 peut comprendre les deux butées 20a, 20b tout en étant monté en rotation axiale sur l'un parmi le manchon 5 et le tasseau 3, tandis que l'organe fixe 18 peut comprendre le doigt 19 tout en étant solidarisé à l'autre parmi le tasseau 3 et le manchon 5.
Les butées 20a, 20b sont agencées de sorte qu'une première butée définisse la position écartée de l'étrier 2 muni de l'ensemble d'ajustement lorsque le doigt 19 est en appui sur elle. En relation avec les figures 4 et 5, lorsque le doigt 19 est porté par l'organe mobile 14 et monté en rotation par rapport au tasseau 3, la butée intérieure 20a remplit cette fonction. According to variants not shown, the movable member 14 may comprise the two stops 20a, 20b while being mounted in axial rotation on one of the sleeve 5 and the cleat 3, while the fixed member 18 may comprise the finger 19 while being secured to the other among the cleat 3 and the sleeve 5. The stops 20a, 20b are arranged so that a first stop defines the spaced apart position of the stirrup 2 provided with the adjustment assembly when the finger 19 bears on it. In relation to FIGS. 4 and 5, when the finger 19 is carried by the movable member 14 and mounted to rotate relative to the cleat 3, the inner stop 20a fulfills this function.
Ainsi, lorsque l'étrier 2 muni de l'ensemble d'ajustement est rappelé en position écartée par le ressort 1 1 dont il est équipé, la course de rappel dudit étrier est interrompue lorsque le doigt 19 de l'organe mobile 14 entre en contact avec la butée intérieure 20a. Thus, when the stirrup 2 provided with the adjustment assembly is returned to its separated position by the spring 1 1 with which it is equipped, the restoring stroke of said stirrup is interrupted when the finger 19 of the movable member 14 enters into position. contact with the inner stop 20a.
Par ailleurs, une fois que le doigt 19 est en contact avec la butée extérieure 20a, l'effort d'immobilisation exercé par le dispositif de contrainte sur l'organe mobile 14 empêche tout mouvement supplémentaire vers l'extérieur dudit organe mobile, et donc de l'étrier 2, de sorte que le patin 4 équipant ledit étrier ne s'écartera de la jante que de la distance correspondant à la position écartée, et le patin 4 équipant l'autre étrier 2 ne se rapprochera pas de la jante au-delà de ladite distance. En outre, l'effort du ressort 1 1 équipant l'étrier 2 muni de l'ensemble d'ajustement est supérieur à l'effort du ressort 1 1 équipant l'autre étrier 2, de sorte que la position écartée des deux étriers 2 est obtenue uniquement par appui sur la butée intérieure 20a, et il n'est pas nécessaire d'équilibrer manuellement les ressorts 1 1 . De plus, l'effort du ressort 1 1 équipant l'autre bras 2 permet de tendre constamment le câble de freinage, sans nécessiter de réglage manuel de ladite tension. Moreover, once the finger 19 is in contact with the outer abutment 20a, the immobilization force exerted by the constraint device on the movable member 14 prevents any additional movement towards the outside of said movable member, and therefore of the stirrup 2, so that the pad 4 equipping said stirrup will deviate from the rim only by the distance corresponding to the spaced apart position, and the pad 4 fitted to the other stirrup 2 will not approach the rim at beyond this distance. In addition, the force of the spring 1 1 equipping the yoke 2 provided with the adjustment assembly is greater than the force of the spring 1 1 equipping the other yoke 2, so that the position spaced from the two calipers 2 is obtained only by pressing on the inner stop 20a, and it is not necessary to manually balance the springs 1 January. In addition, the force of the spring 1 1 equipping the other arm 2 constantly stretches the brake cable without requiring manual adjustment of said voltage.
Pour que la distance en position écartée entre chaque patin 4 et le côté de la jante en regard duquel il est disposé soit toujours optimale, un réglage est nécessaire, notamment lors du montage du système de freinage sur le vélo, que ce soit suite à l'assemblage en usine ou à la remise en place de la roue 1 , ou encore au fur et à mesure de l'usure des patins 4. Par exemple, cette distance peut être de l'ordre de 1 mm.
Pour ce faire, la deuxième butée de l'ensemble d'ajustement sert à déplacer l'organe mobile 14 par rapport au manchon 5 en exerçant sur l'étrier 2 un effort supérieur à l'effort d'immobilisation exercé sur ledit organe mobile par le dispositif de contrainte, par exemple en déplaçant ledit étrier manuellement (lors du montage du système de freinage sur le vélo) ou par l'intermédiaire de la manette de frein (lors de l'utilisation du vélo). En relation avec les figures 4 et 5, lorsque le doigt 19 est porté par l'organe mobile 14 et monté en rotation par rapport au tasseau 3, la butée extérieure 20a remplit cette fonction. So that the distance in position spaced between each pad 4 and the side of the rim opposite which it is arranged is always optimal, an adjustment is necessary, especially when mounting the braking system on the bike, either as a result of assembly at the factory or the replacement of the wheel 1, or as and when the wear of the pads 4. For example, this distance can be of the order of 1 mm. To do this, the second stop of the adjustment assembly serves to move the movable member 14 relative to the sleeve 5 by exerting on the stirrup 2 a force greater than the immobilization force exerted on said movable member by the constraint device, for example by moving said stirrup manually (when mounting the brake system on the bike) or by means of the brake lever (when using the bicycle). In relation to FIGS. 4 and 5, when the finger 19 is carried by the movable member 14 and mounted to rotate relative to the cleat 3, the outer stop 20a fulfills this function.
Comme représenté sur les figures 4, lors du montage des étriers 2 sur les montants du vélo, la course de freinage desdits étriers n'est pas encore réglée (figure 4a). En rapprochant manuellement les étriers 2 de la roue 1 jusqu'à ce que les patins 4 viennent au contact de la jante, on exerce un effort supérieur à l'effort d'immobilisation, ce qui entraîne le déplacement de l'organe mobile 14 par appui du doigt 19 sur la butée extérieure 20b solidarisée à l'étrier 2 (figure 4b). As shown in FIGS. 4, during assembly of the stirrups 2 on the uprights of the bicycle, the braking stroke of said stirrups has not yet been adjusted (FIG. 4a). By manually bringing the stirrups 2 of the wheel 1 until the pads 4 come into contact with the rim, a greater force is exerted on the immobilizing force, which causes the displacement of the movable member 14 by pressing the finger 19 on the outer abutment 20b secured to the yoke 2 (Figure 4b).
En relâchant l'effort exercé sur les étriers 2, chacun desdits étriers est rappelé en position écartée par un ressort 1 1 , et ce jusqu'à ce que le doigt 19 vienne au contact de la butée intérieure 20a, l'effort d'immobilisation du dispositif de contrainte empêchant alors tout mouvement supplémentaire des étriers 2 vers l'extérieur (figure 4c). De même, au fur et à mesure que les patins 4 s'usent, la distance entre chacun desdits patins et la jante augmente. Comme représenté sur les figures 5, pour ajuster la course de freinage à cette usure, le cycliste exerce un effort de déplacement sur les étriers 2 en appuyant sur la manette de frein, jusqu'à ce que le doigt 19 vienne au contact de la butée extérieure 20b d'ajustement (figures 5a, 5b). L'effort de déplacement induit étant plus important que l'effort d'immobilisation exercé par le dispositif de contrainte, l'appui du doigt 19 sur la deuxième butée entraine le déplacement de l'organe mobile 14 jusqu'à ce que les patins 4 entrent en contact avec la jante (figure 5b).
Ainsi, en relâchant la manette de frein, le cycliste permet aux étriers 2 d'être rappelés en position écartée par appui du doigt 19 sur la butée intérieure 20a, ladite butée intérieure ayant été déplacée pour s'ajuster à l'usure des patins 4 (figure 5c) et ainsi ne pas perdre le réglage de la distance en position écartée entre lesdits patins et la jante. By releasing the force exerted on the stirrups 2, each of said stirrups is biased into the spaced position by a spring January 1, and until the finger 19 comes into contact with the inner stopper 20a, the immobilization force the constraint device then preventing any further movement of the stirrups 2 outwards (Figure 4c). Similarly, as the pads 4 wear out, the distance between each of said pads and the rim increases. As shown in FIGS. 5, to adjust the braking stroke to this wear, the cyclist exerts a displacement force on the stirrups 2 by pressing on the brake lever until the finger 19 comes into contact with the stop 20b external adjustment (Figures 5a, 5b). The induced displacement force being greater than the immobilization force exerted by the stress device, the support of the finger 19 on the second stop causes the displacement of the movable member 14 until the pads 4 come into contact with the rim (Figure 5b). Thus, by releasing the brake lever, the cyclist allows the stirrups 2 to be returned to the remote position by pressing the finger 19 on the inner stop 20a, said inner stop having been moved to adjust to the wear of the pads 4 (Figure 5c) and thus do not lose the adjustment of the distance position spaced between said pads and the rim.
En outre, l'écart angulaire entre les butées 20a, 20b est sensiblement égal à la course de freinage de l'étrier 2 muni de l'ensemble d'ajustement. En particulier, le système assure que les patins 4 ne soient jamais en contact avec la jante au repos. In addition, the angular difference between the abutments 20a, 20b is substantially equal to the braking stroke of the yoke 2 provided with the adjustment assembly. In particular, the system ensures that the pads 4 are never in contact with the rim at rest.
Ainsi, le système de freinage selon l'invention permet de faire gagner du temps lors de l'assemblage du vélo, notamment en usine ou durant le remontage d'une roue, tout en réduisant les opérations d'entretien et de réglage à effectuer pour le cycliste au fur et à mesure de l'utilisation dudit vélo.
Thus, the braking system according to the invention makes it possible to save time during assembly of the bicycle, especially at the factory or while reassembling a wheel, while reducing the maintenance and adjustment operations to be carried out for the cyclist as and when using the bicycle.
Claims
1 . Système de freinage pour vélo comprenant deux étriers (2) équipés chacun d'un patin (4) et d'un manchon (5) de montage sur un tasseau (3) solidaire du cadre du vélo pour être disposés de part et d'autre d'une roue (1 ) avec les patins (4) en regard de respectivement un côté de la jante de ladite roue, lesdits manchons étant agencés pour permettre le déplacement en rotation axiale des étriers (2) sur le tasseau (3) suivant une course de freinage définie entre une position écartée et une position rapprochée, chacun desdits étriers étant équipé d'un ressort (1 1 ) de contrainte dudit étrier en position écartée, ledit système étant caractérisé en ce que l'un des étriers (2) est muni d'un ensemble d'ajustement de sa course de freinage comprenant un organe mobile (14) monté en rotation axiale sur l'un parmi le manchon (5) et le tasseau (3) par l'intermédiaire d'un dispositif de contrainte de ladite rotation, ledit dispositif étant agencé pour exercer un effort d'immobilisation de l'organe mobile (14) qui est supérieur à l'effort exercé par le ressort (1 1 ) équipant ledit étrier, ledit ensemble comprenant en outre un organe fixe (18) destiné à être solidarisé à l'autre parmi le tasseau (3) et le manchon (5), un organe (14, 18) présentant un doigt (19) et l'autre organe (18, 14) formant deux butées (20a, 20b) pour définir une course de déplacement angulaire relative desdits organes, une première butée (20b) définissant la position écartée dudit étrier lorsque le doigt (18) est en appui sur elle, la deuxième butée (20a) servant à déplacer l'organe mobile (14) en exerçant sur l'étrier (2) un effort supérieur à l'effort d'immobilisation dudit organe mobile, l'effort du ressort (1 1 ) équipant l'étrier (2) muni de l'ensemble d'ajustement étant supérieur à l'effort du ressort (1 1 ) équipant l'autre étrier (2). 1. Bicycle brake system comprising two stirrups (2) each equipped with a pad (4) and a sleeve (5) for mounting on a cleat (3) integral with the frame of the bicycle to be arranged on both sides a wheel (1) with the pads (4) opposite respectively one side of the rim of said wheel, said sleeves being arranged to allow axial displacement of the stirrups (2) on the cleat (3) following a braking stroke defined between a spaced apart position and a close position, each of said stirrups being equipped with a spring (1 1) of stress of said stirrup in the spaced apart position, said system being characterized in that one of the stirrups (2) is provided with an adjusting assembly of its braking stroke comprising a movable member (14) mounted in axial rotation on one of the sleeve (5) and the cleat (3) via a constraining device of said rotation, said device being arranged to exert an effo immobilizing the movable member (14) which is greater than the force exerted by the spring (1 1) equipping said yoke, said assembly further comprising a fixed member (18) intended to be secured to the other among the cleat (3) and the sleeve (5), a member (14, 18) having a finger (19) and the other member (18, 14) forming two stops (20a, 20b) for defining a displacement stroke relative angle of said members, a first stop (20b) defining the spaced apart position of said stirrup when the finger (18) bears on it, the second stop (20a) serving to move the movable member (14) by exerting on the stirrup (2) a force greater than the immobilizing force of said movable member, the force of the spring (1 1) equipping the stirrup (2) provided with the adjustment assembly being greater than the spring force (1 1) equipping the other stirrup (2).
2. Système de freinage selon la revendication 1 , caractérisé en ce que l'écart angulaire entre les butées (20a, 20b) est sensiblement égal à la course de freinage de l'étrier (2) muni de l'ensemble d'ajustement. 2. Braking system according to claim 1, characterized in that the angular spacing between the stops (20a, 20b) is substantially equal to the braking stroke of the stirrup (2) provided with the adjustment assembly.
3. Système de freinage selon la revendication 1 ou 2, caractérisé en ce que l'organe mobile (14) est monté en rotation axiale sur le manchon (5), l'organe fixe (18) étant destiné à être solidarisé au tasseau (3).
3. Braking system according to claim 1 or 2, characterized in that the movable member (14) is mounted in axial rotation on the sleeve (5), the fixed member (18) being intended to be secured to the cleat ( 3).
4. Système de freinage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'organe mobile (14) comprend une rondelle, le doigt (19) s'étendant radialement depuis ladite rondelle. 4. Braking system according to any one of claims 1 to 3, characterized in that the movable member (14) comprises a washer, the finger (19) extending radially from said washer.
5. Système de freinage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le dispositif de contrainte comprend au moins un élément de friction (15) interposé entre l'organe mobile (14) et l'un parmi l'étrier (2) et le tasseau (3). 5. Braking system according to any one of claims 1 to 4, characterized in that the constraint device comprises at least one friction element (15) interposed between the movable member (14) and one of the stirrup (2) and the cleat (3).
6. Système de freinage selon la revendication 5, caractérisé en ce que l'élément de friction comprend deux rondelles de friction (15) disposées de part et d'autre de l'organe mobile (14). 6. Braking system according to claim 5, characterized in that the friction element comprises two friction washers (15) disposed on either side of the movable member (14).
7. Système de freinage selon la revendication 5 ou 6, caractérisé en ce que le dispositif de contrainte comprend une rondelle élastique (16) et une rondelle de serrage (17) entre lesquelles sont disposés l'organe mobile (14) et l'élément de friction (15). 7. Braking system according to claim 5 or 6, characterized in that the constraint device comprises a spring washer (16) and a clamping washer (17) between which are arranged the movable member (14) and the element friction (15).
8. Système de freinage selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'organe fixe (18) comprend deux pattes axiales (18b) définissant respectivement une butée (20a, 20b), le doigt (19) de l'organe mobile (14) étant disposé entre lesdites pattes. 8. Braking system according to any one of claims 1 to 7, characterized in that the fixed member (18) comprises two axial lugs (18b) respectively defining a stop (20a, 20b), the finger (19) of the movable member (14) being disposed between said tabs.
9. Système de freinage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'organe fixe (18) comprend une patte radiale (18a) qui présente un moyen d'association à l'un parmi l'étrier (2) et le tasseau (3). 9. Braking system according to any one of claims 1 to 8, characterized in that the fixed member (18) comprises a radial tab (18a) which has a means of association with one of the stirrup ( 2) and the cleat (3).
10. Système de freinage selon l'une quelconque des revendications 1 à 9, caractérisé en ce que chaque ressort (1 1 ) comprend un corps hélicoïdal (1 1 a) monté autour du manchon (5), ledit corps étant prolongé par une tige supérieure (1 1 b) maintenue en position sur un ergot (12) de l'étrier (2), ledit
corps étant en outre prolongé par une tige axiale (1 1 c) destinée à être fixée au tasseau (8). 10. Braking system according to any one of claims 1 to 9, characterized in that each spring (1 1) comprises a helical body (1 1 a) mounted around the sleeve (5), said body being extended by a rod upper (1 1 b) held in position on a lug (12) of the stirrup (2), said body being further extended by an axial rod (1 1 c) intended to be fixed to the cleat (8).
1 1 . Vélo comprenant un cadre qui présente deux montants entre lesquels une roue (1 ) est montée, chaque montant comprenant un tasseau (3) sur lequel est monté le manchon (5) de respectivement un étrier (2) d'un système de freinage selon l'une quelconque des revendications 1 à 10, ledit vélo comprenant un câble de freinage raccordé aux étriers (2) afin de les entraîner par traction dudit câble sur une course de freinage depuis une position écartée, dans laquelle les patins (4) sont écartés de la jante, vers une position rapprochée de freinage, dans laquelle lesdits patins sont au contact de ladite jante, chaque étrier (2) étant rappelé en position écartée par un ressort (1 1 ), une première butée (20a) étant agencée pour définir la position écartée de l'étrier (2) muni de l'ensemble d'ajustement lorsque le doigt (19) est en appui sur elle, la deuxième butée (20b) servant à déplacer l'organe mobile (19) sous l'effet d'un déplacement de l'étrier (2) avec un effort supérieur à l'effort d'immobilisation dudit organe mobile exercé par le dispositif de contrainte. 1 1. Bicycle comprising a frame which has two uprights between which a wheel (1) is mounted, each upright comprising a cleat (3) on which is mounted the sleeve (5) of respectively a stirrup (2) of a braking system according to l any one of claims 1 to 10, said bicycle comprising a braking cable connected to the brackets (2) for pulling said cable on a braking stroke from a remote position, wherein the pads (4) are separated from the rim, to a close braking position, wherein said pads are in contact with said rim, each yoke (2) being biased back into position by a spring (1 1), a first stop (20a) being arranged to define the position away from the stirrup (2) provided with the adjustment assembly when the finger (19) bears on it, the second stop (20b) serving to move the movable member (19) under the effect of a displacement of the stirrup (2) with u n force greater than the immobilizing force of said movable member exerted by the constraint device.
12. Vélo selon la revendication 14, caractérisé en ce que le manchon (5) de chaque étrier (2) est disposé autour du tasseau (3) avec ledit étrier disposé du côté de l'extrémité distale (8a) dudit tasseau, ledit étrier étant fixé audit tasseau au moyen d'un vis (9) de serrage montée dans ledit tasseau, la vis (9) comprenant une tête (9a) disposée en appui sur une face extérieure de l'étrier (2), l'organe fixe (18) étant interposé entre ladite tête et ladite face extérieure pour être solidarisé au tasseau (3). 12. A bicycle according to claim 14, characterized in that the sleeve (5) of each stirrup (2) is arranged around the cleat (3) with said stirrup disposed on the side of the distal end (8a) of said cleat, said stirrup being fixed to said cleat by means of a screw (9) clamping mounted in said cleat, the screw (9) comprising a head (9a) disposed in abutment on an outer face of the stirrup (2), the fixed member (18) being interposed between said head and said outer face to be secured to the cleat (3).
13. Vélo selon la revendication 12, caractérisé en ce que la dimension axiale du tasseau (3) est supérieure à la dimension axiale du manchon (5), l'organe fixe (18) étant plaqué axialement contre le tasseau (3) au moyen de la tête (9a) de la vis (9) de serrage.
13. Bicycle according to claim 12, characterized in that the axial dimension of the cleat (3) is greater than the axial dimension of the sleeve (5), the fixed member (18) being pressed axially against the cleat (3) by means the head (9a) of the tightening screw (9).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1261962A FR2999144B1 (en) | 2012-12-12 | 2012-12-12 | BRAKE SYSTEM FOR BIKE |
FR1261962 | 2012-12-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014091105A1 true WO2014091105A1 (en) | 2014-06-19 |
Family
ID=47741139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2013/052815 WO2014091105A1 (en) | 2012-12-12 | 2013-11-21 | Bicycle braking system |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2999144B1 (en) |
WO (1) | WO2014091105A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5788020A (en) | 1997-08-14 | 1998-08-04 | Chang Star Corporation | Device for micro-adjusting bicycle brake holder |
US5853069A (en) * | 1997-04-01 | 1998-12-29 | Falcon Industrial Co., Ltd. | Mechanism for microadjusting bicycle brake tension |
DE29914644U1 (en) * | 1999-08-19 | 1999-12-23 | Horng Jia Industry Co., Ltd., Lu Kang, Chang Hwa | Brake adjustment device for a bicycle |
EP1140609A1 (en) | 1998-12-30 | 2001-10-10 | OLDE-HEUVEL, Bernardus Johannes Maria | Self-centring brake device |
-
2012
- 2012-12-12 FR FR1261962A patent/FR2999144B1/en not_active Expired - Fee Related
-
2013
- 2013-11-21 WO PCT/FR2013/052815 patent/WO2014091105A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5853069A (en) * | 1997-04-01 | 1998-12-29 | Falcon Industrial Co., Ltd. | Mechanism for microadjusting bicycle brake tension |
US5788020A (en) | 1997-08-14 | 1998-08-04 | Chang Star Corporation | Device for micro-adjusting bicycle brake holder |
EP1140609A1 (en) | 1998-12-30 | 2001-10-10 | OLDE-HEUVEL, Bernardus Johannes Maria | Self-centring brake device |
DE29914644U1 (en) * | 1999-08-19 | 1999-12-23 | Horng Jia Industry Co., Ltd., Lu Kang, Chang Hwa | Brake adjustment device for a bicycle |
Also Published As
Publication number | Publication date |
---|---|
FR2999144B1 (en) | 2014-12-05 |
FR2999144A1 (en) | 2014-06-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2543583B1 (en) | Bicycle wheel supporting assembly with integrated brake | |
EP0599716A1 (en) | Process and device for breaking, especially for bicycles | |
EP2490928B1 (en) | Push device with clearance compensation for rack-and-pinion steering of a motor vehicle | |
EP2058217B1 (en) | Device for adjusting the castor angle of the front wheel of a cycle and wheel with such a device | |
EP2088346B1 (en) | Guide for a disc brake pad support | |
FR2654406A1 (en) | FRONT FORK OF MOTORCYCLE. | |
EP0734496B1 (en) | Automatic adjusting strut for drum brake | |
EP2607222B1 (en) | Bicycle pedal with automatic engagement and disengagement | |
WO2014091105A1 (en) | Bicycle braking system | |
EP2879943B1 (en) | Bicycle convertible into a hobby horse | |
EP3502507B1 (en) | Modular disc brake provided with a compact cap and brake shoe mounting system | |
EP2679478B1 (en) | System for fixing an accessory to a bicycle | |
FR2739827A1 (en) | CONTROL DEVICE FOR A BICYCLE BRAKE, COMPRISING A DEVICE FOR LIMITING THE BRAKING FORCE | |
EP0319358B1 (en) | Drum brake with automatic adjustment | |
WO2014122404A1 (en) | System for mounting a wheel on a wheelchair | |
EP2861479B1 (en) | Off-centre yoke for a motor vehicle steering system | |
FR2849136A1 (en) | Disk brake motor, has sensitive unit sensitive unit detecting wearing of friction unit and provoking step-by-step control device of self-by-step control device to unscrew nut engaged on screw based on wearing | |
FR2586580A1 (en) | Device for height adjustment of a ski binding, of the type with multi-directional releasing | |
FR3113483A1 (en) | Connecting device between a saddle and a bicycle frame | |
WO2009156616A2 (en) | Braking device for a cycle | |
FR2487770A1 (en) | Disc brake for motorcycle - is mounted on caliper across disc carried on wheel hub | |
BE337805A (en) | ||
FR3061858A1 (en) | PHYSICAL EXERCISE APPARATUS IN SWIMMING POOL, OF BIKE TYPE | |
FR2859452A1 (en) | Brake caliper for e.g. all-terrain bike, has brake shoe carried by brake shoe supports connected to lever by deformable link, where supports are connected to deformable parallelogram assembly by built-in connections | |
FR2873590A1 (en) | Complete shoe holder unit for ski or snowboard has front and rear holders with slide connection with relatively movable slide elements for easier mounting |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13803170 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13803170 Country of ref document: EP Kind code of ref document: A1 |