BRAKE ASSEMBLY FOR A DISC BRAKE

Abstract

Brake assembly (14) for a friction braking device (10), the assembly extending in a first axial direction (A), the assembly comprising:- at least one brake pad (18) comprising a friction face intended to come into contact with a brake disc (12), the pad being provided with at least one particle collection groove and at least one orifice in fluid communication with said collection groove, the at least one orifice opening onto an edge of the at least one pad;- a brake caliper (16) comprising an installation housing (21) for the at least one pad, said caliper comprising an opening (22) located opposite the at least one orifice in a radial direction; and- at least one fluid communication means (19) connected to said at least one orifice through said opening of the caliper. Abstract figure: Figure 1

Description

Title of the invention: BRAKE ASSEMBLY FOR A DISC BRAKE Technical field

[0001] The present disclosure relates to the field of brake assemblies for a disc brake. Prior art

[0002] Conventionally, a friction braking device for a road or rail vehicle is equipped with a brake disc, two brake pads and a caliper.

[0003] The disc has an annular shape extending around an axial direction. Each pad comprises a lining made of friction material, and a sole carrying the lining. In particular, the lining comprises a first face directly connected to the sole, and a second face, called the friction face, opposite the first face.

[0004] A pad installation housing is provided in the caliper, a portion of the disc being received axially between the two pads. Each pad is in particular arranged in the housing so that, during braking phases, the friction face comes axially into contact with the disc. Polluting particles are then generated by friction between each pad and the disc.

[0005] In order to limit the release of these polluting particles into the environment, FR 3057040 A1 proposes providing the lining of each pad with a groove in which the particles are collected, and connecting this groove to a suction device from a fluid communication means, such as a suction pipe. To this end, the base of each pad is axially traversed by an orifice which opens onto the groove of the base, and a cavity specially shaped to receive the suction pipe is provided axially in the caliper. The suction pipe is therefore connected to the groove of the corresponding pad through the orifice and the axial cavity of, respectively, the base and the caliper. The terms "axial" or "axially" used above mean parallel to the axial direction around which the brake disc rotates in the braking device.

[0006] In the prior art, it is therefore necessary to machine the axial cavity in the caliper, which complicates its manufacture and requires re-approving existing braking devices, in particular their calipers. Summary

[0007] The present disclosure improves the situation.

[0008] For this purpose, there is provided a brake assembly for a braking device friction, the assembly extending in a first axial direction, the assembly comprising: - at least one brake pad comprising a sole and a lining made of friction material, said lining comprising a friction face intended to come into contact with a brake disc, the lining being provided with at least one particle collection groove open on said friction face, the at least one pad comprising at least one orifice in fluid communication with said at least one collection groove, the at least one orifice opening onto an edge of the at least one pad; - a brake caliper comprising a housing for installing the at least one pad, said caliper comprising an opening located opposite the at least one orifice in a radial direction substantially perpendicular to said first axial direction; and - at least one fluid communication means comprising at least one first end connected to said at least one orifice through said opening of the stirrup, and a second end intended to be connected to a source of depression.

[0009] The at least one fluid communication means being connected to the at least one pad through the opening of the caliper, it is not necessary to machine a cavity passing axially through the caliper and shaped to receive the at least one fluid communication means. The manufacture of the brake assembly is therefore simplified, more economical and there is no need to re-approve the caliper.

[0010] Advantageously, the opening of the caliper is shaped to allow the installation and removal of the at least one pad. In other words, the dimensions of the opening can allow the at least one pad to be inserted or extracted from the assembly through the opening. More precisely, this passage of the at least one pad through the opening of the caliper can be possible with the pad positioned according to its final orientation in the assembly. It is therefore possible to replace the at least one pad with a new pad without needing to disassemble the caliper from the brake disc. The opening of the caliper can therefore have a dual use: opening for the installation / removal of the at least one pad, and opening for connecting the at least one fluid communication means to the at least one pad. The manufacture of the assembly is therefore simpler and more economical because the same opening can provide these two functions.

[0011] During braking, the friction face of the pad is moved until it comes into contact with the brake disc. This contact causes friction forces between the pad and the disc which cause the progressive wear of the pad lining and the disc. Particles from the friction material of the lining and the disc material are thus generated, these particles generally being polluting and toxic.

[0012] The brake disc has, for example, a substantially annular shape extending around the first axial direction.

[0013] In the present text, by "axial" or "axially" is meant substantially parallel to the first axial direction, while by "radial", "radially", "transverse" or "transversely" is meant substantially perpendicular to the first axial direction.

[0014] In the brake assembly, the friction face of the at least one pad may have a normal vector substantially parallel to the first axial direction when the pad is installed in the brake assembly. The lining of the at least one pad further comprises a face axially opposite the friction face, called a connecting face. The connecting face may be directly or indirectly fixed to the shoe. The lining of the at least one pad comprises a peripheral edge connecting the friction face and the connecting face at the periphery of the lining.

[0015] The sole of the at least one pad comprises a first face and a second face which are advantageously of normal vector substantially parallel to the first axial direction when the pad is installed in the brake assembly. The first face of the sole and the second face of the sole are in particular axially opposite one another. The first face of the sole is for example fixed, directly or indirectly, to the lining.

[0016] The at least one pad may further comprise a central groove formed in the lining and open on the friction face. The central groove may extend substantially axially in the thickness of the lining and terminate in a blind bottom. The central groove may separate the lining into a first portion and a second portion. In some cases, the central groove is arranged in a position in which each of the first and second portions of the lining form one half thereof. According to one example, the at least one pad comprises two collection grooves, a first collection groove located on the first portion of the lining, and a second collection groove located on the second portion of the lining. According to a non-limiting example, each of the first and second collection grooves has a curved shape.For example, the first collection groove may include a first portion and a second portion each located in continuity with the other. The first portion may extend substantially parallel and adjacent to a first face of the peripheral edge of the pad of the wafer, while the second portion may extend substantially parallel and adjacent to the central groove. In the case of the second collection groove, the latter may include a first portion and a second portion each located in continuity with the other. The first portion may extend substantially parallel and adjacent to a second face of the peripheral edge of the . lining radially opposite the first face of this peripheral edge. The second portion may extend substantially parallel and adjacent to a face of the peripheral edge of the lining connecting the first and second faces of this peripheral edge. Such shapes of the first and second collection grooves make it possible to improve the efficiency of particle collection (a greater quantity of particles is collected thanks to these shapes). In particular, thanks to these shapes of the collection grooves, it is possible to collect the particles before they reach the central groove, thus improving the efficiency of particle collection.

[0017] The caliper may be a fixed caliper or a floating caliper. According to one example, a cross-section of the caliper has a circular segment shape. The caliper comprises, for example, a side wall and two transverse walls. The side wall may extend around the first axial direction. The transverse walls of the caliper may extend substantially perpendicular to the first axial direction. The installation housing of the at least one pad is, for example, delimited between the side and transverse walls of the caliper. The opening of the caliper is, for example, provided on the side wall of the caliper, so that the opening can open onto the housing of the caliper.

[0018] The at least one fluid communication means comprises, for example, at least one suction pipe comprising at least one first end. Each first end is connected to one of the orifices through said opening of the stirrup. The at least one fluid communication means further comprises a second end intended to be connected to a vacuum source. The at least one fluid communication means may be a flexible or rigid pipe, or a pipe comprising flexible parts and rigid parts. The pipe is, for example, a pneumatic pipe.

[0019] Advantageously, each fluid communication means can be connected radially to a respective orifice of the at least one plate. In certain cases, the same fluid communication means is connected to several orifices of the same plate. In other cases, the same fluid communication means is connected to several orifices of the different plates.

[0020] As said at least one orifice opens onto the edge of the at least one wafer, each fluid communication means can be connected to this edge of the wafer.

[0021] According to one example, the at least one orifice opens directly onto the at least one collection groove. Advantageously, the at least one orifice preferably opens onto one of the ends of the at least one collection groove. The particles generated by the friction between the lining and the brake disc are therefore collected over the entire length of the corresponding collection groove and sucked into the end where at least one orifice opens.

[0022] Alternatively, a cavity may fluidly connect the at least one orifice to the at least one collection groove.

[0023] According to one example, the number of orifices is equal to the number of collection grooves. Alternatively, the number of orifices may be less than the number of collection grooves, with a single orifice being fluidly connected to several collection grooves. Alternatively, the number of orifices may be greater than the number of collection grooves, with several orifices being connected to a single collection groove.

[0024] The vacuum source, when connected to said at least one fluid communication means, makes it possible to suck the particles collected in the at least one collection groove. The vacuum source is for example a suction device. The air is able to circulate in the fluid communication means up to the vacuum source.

[0025] The friction braking device can be used in a braking system, for example in a road vehicle (cars, buses, heavy goods vehicles, etc.) or rail vehicle (trains, trams, metros, etc.), but also in a stationary rotor machine, such as a wind turbine or an industrial machine.

[0026] According to one aspect, the at least one orifice may be provided in a first face of a peripheral edge of said sole, said first face of said peripheral edge being arranged radially opposite said opening of the stirrup.

[0027] The at least one orifice can thus be positioned in a position allowing the particles collected in the at least one collection groove to be better sucked up. In addition, since the orifice can be provided in a face of the peripheral edge of the sole which is radially opposite the opening of the stirrup, the connection of the at least one fluid communication means to the orifice is facilitated and does not require the machining of the cavities expressly dedicated to the passage of the at least one communication means for its connection to the orifice of the pad.

[0028] The peripheral edge of the sole is advantageously arranged so as to connect the first and second faces of the sole. According to one example, the peripheral edge of the sole comprises said first face and a second face. When the insert is installed in the assembly, the first face is a radially external face, while the second face is a radially internal face.

[0029] In other cases, in particular when the sole is very thin, the at least one orifice may be provided between the lining and the sole of the at least one pad. In such a case, the orifice, however, preferably remains positioned below the wear limit dimension of the lining.

[0030] In other cases, the at least one orifice is provided in a face of the lining arranged radially opposite the opening of the caliper. In such cases, the orifice remains, however, preferably positioned below the wear limit dimension of the lining.

[0031] According to all these configurations, the at least one fluid communication means can be connected radially to the plate.

[0032] According to another aspect, the assembly may further comprise a cannula projecting substantially radially from the at least one orifice, said cannula being shaped to be connected to the at least one fluid communication means.

[0033] The cannula makes it possible to fluidly connect the at least one fluid communication means to the respective orifice of the wafer more easily and in a sealed manner.

[0034] The cannula may protrude from said first face of the peripheral edge of the sole when the orifice is included in this first face.

[0035] Advantageously, the number of cannulas is equal to the number of orifices in the plate.

[0036] The at least one cannula can be screwed, welded, glued or force-fitted into the plate, in particular into the at least one orifice. Of course, any other manner of fixing the at least one cannula to the plate can be used.

[0037] According to a non-limiting example, the cannula is rigid, for example made of metallic material.

[0038] The at least one fluid communication means may be clipped onto a respective cannula. Alternatively, it is the cannula that may be clipped onto the respective fluid communication means.

[0039] According to another aspect, the at least one fluid communication means comprises a plurality of branches opening onto a main conduit.

[0040] Thus, the same fluid communication means can be connected to several orifices arranged on the same plate or on different plates.

[0041] According to one example, two fluid communication means are provided in the assembly, each comprising two branches, each of these branches being connected to the orifice of a different plate.

[0042] Said at least one first end of the at least one fluid communication means may be included in a branch of said plurality of branches. Said second end of the at least one fluid communication means may be included in said main conduit.

[0043] According to an alternative example, when the at least one fluid communication means comprises a single first end, the fluid communication means may be devoid of the plurality of branches and comprise only said main conduit. In such a case, the first end and the second end of the at least one fluid communication means are included in said main conduit.

[0044] According to one aspect, the at least one fluid communication means is shaped to be substantially axially extensible.

[0045] In the present text, by “extendable” we mean that the fluid communication means can stretch or shorten depending on external stresses.

[0046] For example, the at least one fluid communication means may be telescopic, i.e., formed by at least two parts, one being capable of sliding inside the other. According to a non-limiting example, the fluid communication means comprises a first part and a second part. The first part may comprise an end portion shaped to be received in an end portion of the second part and to be able to slide therein substantially axially.

[0047] Advantageously, one of the two branches can be carried by the first part of the fluid communication means, and the other of the two branches is carried by the second part of the fluid communication means.

[0048] According to an alternative example not illustrated, the fluid communication means may comprise a bellows capable of extending and shortening in the axial direction. The bellows facilitates the mounting of the brake because it allows radial or tangential play during mounting. In such a case, advantageously, each of the two branches is arranged on one side and the other of the bellows.

[0049] The fluid communication means being substantially axially extensible, it therefore has a degree of freedom in a direction substantially parallel to the axial direction. Thus, when the fluid communication means is connected to orifices arranged on two different pads, the fluid communication means can follow the axial movement of the pads between the braking and non-braking phases, which avoids the formation of a force couple between the pad and the fluid communication means, in particular after the braking phase when each pad moves away from the disc.

[0050] More precisely, as during braking phases the pads move axially closer together, the fluid communication means shortens axially. In particular, the end portion of the first part is inserted more into the end portion of the second part, or the bellows contracts axially. On the contrary, outside of braking phases, as the pads move axially away from each other, the fluid communication means increases its axial dimension. In particular, the end portion of the first part is partly removed from the end portion of the second part, or the bellows expands axially.

[0051] By virtue of being substantially axially extensible, the fluid communication means can also axially follow the wear of each pad due to friction with the disc during braking phases.

[0052] According to one aspect, the assembly may further comprise a device for locking the at least one plate in radial position in said installation housing, said locking device being connected to the stirrup opposite said opening.

[0053] The locking device may be mounted opposite the opening of the stirrup.

[0054] The locking device may comprise a locking bar and at least one locking spring. Preferably, the number of locking springs is equal to the number of plates.

[0055] Each locking spring is shaped to be arranged on the first face of said peripheral edge of the sole of one of the plates. In particular, each locking spring may comprise at least one hole capable of receiving a protrusion projecting substantially radially from the first face of said peripheral edge of the sole. The number of holes in the spring may be equal to the number of protrusions of the corresponding plate.

[0056] The locking bar may extend substantially axially over the entire axial dimension of the opening of the stirrup.

[0057] A first end of the locking bar may be connected to a first edge of the opening which is included in a plane substantially perpendicular to the first axial direction. This first edge of the opening may comprise a connecting zone. In certain cases, this connecting zone projects substantially radially towards the outside of the stirrup. Said connecting zone may be crossed by a cavity substantially parallel to said first edge of the opening. A pin passing through the cavity of the connecting zone may be provided to connect the first end of the locking bar to the stirrup. Advantageously, the pin is removably mounted in the connecting zone.

[0058] A second end of the locking bar which is axially opposite said first end of the locking bar may be connected to a second edge of the opening of the stirrup which is axially opposite said first edge of the opening. The second end of the locking bar may be pressed substantially axially against the second edge of the opening of the stirrup. Thus, the connection between the second end of the locking bar and the second edge of the opening may be removable and may be made without using additional means to maintain it. Of course, additional means, such as screws, could be used to maintain the connection between the second end of the locking bar and the second edge of the opening of the stirrup.

[0059] The locking bar may be positioned at a substantially central position of the caliper opening. This position improves the retention of each pad in the caliper housing and reduces the risk of each pad changing its orientation in the assembly. Other positions of the locking bar in relation to the opening of the stirrup could of course be considered. It is also possible to provide several locking bars in the set.

[0060] Each pad can be pressed radially inwardly into the caliper housing by means of the locking bar. For example, the locking bar exerts a force on each locking spring that is directed radially inwardly into the housing. The radially outward movement of each pad from the housing can thus be limited by means of the locking device. This prevents each pad from spontaneously disengaging from the brake assembly through the opening in the caliper. It should be noted that the locking bar, even if it can extend over the entire axial dimension of the opening, generally does not cover the entire surface of the opening. The locking bar therefore makes it possible to hold the pads inside the housing while reducing manufacturing costs and the weight of the assembly.

[0061] As previously indicated, both ends of the locking bar are removably connected to the caliper. Also, to replace each brake pad, the locking bar, as well as the respective locking spring can be removed from the brake assembly. The pad can thus be removed from the assembly through the opening and replaced with a new pad, without the need for further disassembly of the brake assembly.

[0062] In some cases, the connection between the pin and said connection zone may be a pivot connection with an axis substantially parallel to the axis of the cavity of the connection zone. Also, in such a case, it is possible to remove and replace each pad without needing to completely detach the locking bar from the assembly. Indeed, it is sufficient to rotate the locking bar around the axis of the pivot connection to release the opening of the caliper and thus be able to uninstall and / or install a pad through this opening.

[0063] Advantageously, the locking device, and in particular its locking bar and its locking springs, are designed to deform elastically when they are subjected to stresses in the brake assembly.

[0064] In some cases, the locking device may serve to connect each fluid communication means to the brake assembly, thereby reducing the risk of disengagement of each fluid communication means from the brake assembly. For example, each fluid communication means may be connected to the locking bar.

[0065] According to one aspect, the at least one fluid communication means is fixed on said locking device. This prevents the at least one fluid communication means from disengaging from the assembly. For example, the at least one fluid communication means can be connected to the locking bar.

[0066] According to one aspect, the assembly may comprise a part for closing said opening.

[0067] Thanks to the closing part, it is prevented that the at least one plate and / or the at least one fluid communication means become disengaged from the assembly.

[0068] The closing part can close the opening. This closing can be total or partial. The closing part comprises, for example, a sheet metal shaped to cover the entire opening of the stirrup.

[0069] The sheet metal may have a circular arc cross-section. This allows for a sufficiently wide space between the closure piece and the opening so that the at least one fluid communication means is also covered by the closure piece. According to a non-limiting example, the sheet metal is made of a metallic material.

[0070] The closure part may comprise at least one groove. The closure part may in particular comprise a number of grooves equal to the number of fluid communication means in the assembly. Each groove may be shaped to receive, at least in part, one of the fluid communication means of the assembly. According to a non-limiting example, each groove has a shape complementary to the shape of said second part of each fluid communication means. Also, the second part of each fluid communication means may be installed in a respective groove. Once in the groove, the movements of said second part of each fluid communication means are limited, which limits the risk of this second part of each fluid communication means becoming detached from each orifice of the plate to which it is fluidically connected. According to one example, the second part may be snapped into the groove.Advantageously, each groove can be sized so that a clearance exists between the part of the fluid communication means installed in the groove, and an internal wall of this groove. Thanks to this clearance, it is possible to limit the movements of this part of each communication means once installed in the groove, while allowing a certain mobility limited to the dimensions of the clearance.

[0071] The closure part may further comprise at least one opening. In particular, the closure part may comprise a number of openings equal to the number of fluid communication means in the assembly. Each opening may be shaped and positioned to allow the passage, at least in part, of one of the fluid communication means. Each opening may be shaped and positioned to allow the passage of the first part of a respective fluid communication means. Thus, said first part of each fluid communication means may exit the space delimited between the opening and the closure part. Thus, the second end of each fluid communication means is accessible for its connection to the vacuum source. According to one example, each opening of the closing part is axially in continuity with a respective groove.

[0072] To maintain the closure piece in position relative to the stirrup, several configurations are possible. According to a first configuration, it can be force-fitted into the opening of the stirrup. For this purpose, the closure piece is advantageously elastically deformable. According to another configuration, the closure piece is made in one piece with the locking device, in particular with the locking bar. Thus, the connection described above of the locking bar on the stirrup also makes it possible to maintain the closure piece in position relative to the stirrup. According to another configuration, a fixing by a crapaudine or, in other words, by pinching, can be used to maintain the closure piece in position relative to the stirrup. According to another configuration, the closure piece can be an individual piece connected to the locking bar.According to one example, the closure piece may be assembled around the locking bar before the locking bar is arranged in the opening. The closure piece may, for example, be shaped to slide along the locking bar until it reaches its final position on the bar. The closure piece may be held to the locking bar by screw elements. Once in this position, the bar, connected to the closure piece, may be arranged in the opening as described above.

[0073] Of course, these configurations for holding the closing part in position on the stirrup can be combined with each other as long as they are not incompatible.

[0074] According to one aspect, the at least one fluid communication means can be connected to said closure part. This prevents the at least one fluid communication means from becoming detached from the closure part.

[0075] According to one aspect, the closing part comprises at least one slide shaped to receive a connecting member carried by the at least one fluid communication means, the connecting member being received in the at least one slide so as to be able to slide inside the at least one slide.

[0076] The connecting member therefore makes it possible to connect and secure the at least one fluid communication means and the closing part of the opening of the stirrup. The closing part and the at least one fluid communication means are thus connected in such a way that the at least one fluid communication means is held in position relative to the closing part. Furthermore, the slide allows the closing part to be locked at the same time as the locking device, thus serving as passive safety.

[0077] The connecting member has for example a T shape. The connecting member can project outside the fluid communication means which carries it. The connecting member connection may in particular be carried by a branch of said first part of the respective fluid communication means.

[0078] The number of slides may be equal to the number of fluid communication means in the assembly. The at least one slide extends substantially axially. In particular, the at least one slide comprises two rails extending substantially axially.

[0079] Advantageously, the dimensions of the at least one slide and the connecting member allow the connecting member to be able to move axially in the slide. Thanks to this axial movement of the connecting member in the at least one slide, the at least one fluid communication means can be easily installed in the closing part. In addition, this axial movement allows the at least one fluid communication means to follow the movement of each pad which takes place during and after the braking phases, as well as the movement of each pad which takes place due to their wear.

[0080] The at least one slide may comprise an opening. To form this opening, the two rails or at least one of the rails of the slide may be interrupted at a location of their axial dimension.

[0081] According to a non-limiting example, the at least one fluid communication means can be installed in the closure part in the following manner: firstly, the first part of the at least one fluid communication means can be connected to the closure part. For this purpose, the connecting member carried by the first part can be introduced into the respective slide through the corresponding opening, and the second end of the at least one fluid communication means can be extracted towards the outside of the closure part through the opening of the corresponding closure part. Then, the first part can be moved axially by sliding the connecting member in the slide. This axial movement is advantageously made in a direction causing the second end of the fluid communication means to be further extracted towards the outside of the closure part through the opening thereof.The second part of the fluid communication means can then be installed in the respective groove. Finally, the first part can again be axially displaced by sliding the connecting member in the slide. This time, this axial displacement can be made in a direction causing the end portion of the first part shaped to be received inside the second part to be effectively introduced inside this second part.

[0082] According to another aspect, the stirrup comprises at least one bore for fixing or sliding the stirrup, the assembly comprising a support for the fluid communication means, the support having at least one orifice coaxial with the at least a bore.

[0083] The bore or bores may be provided to allow the caliper to slide along posts. Alternatively, the bore or bores may be provided for the attachment of a fixed caliper to the axle or other structural member of the vehicle or machine on which it is mounted. The coaxiality of a hole in the bracket allows a single guide, pin or bolt to attach both the caliper and the bracket.

[0084] The support may be formed from a punched and folded sheet metal. The support may have a general Y shape, with two branches fixed to the caliper and one branch partially covering the opening of the caliper or the pad holding bar. The fluid communication means may be fixed (for example clipped) to the support, in particular at the opening of the caliper.

[0085] According to another aspect, the fluid communication means comprises elastomer pipe segments. These segments make it possible to increase the flexibility of the fluid communication means to prevent its deformation from modifying the dynamic behavior of the pads during their (relative) movement relative to the disc.

[0086] According to another aspect, a spring is attached to a radially external edge of the at least one plate and the fluid communication means comprises a tab bearing axially on the spring. This tab thus makes it possible to secure the movement of the fluid communication means with the plate at a predetermined location and thus to control the deformation / extension of the fluid communication means. Brief description of the drawings

[0087] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawings, in which: Fig.l

[0088] [Fig.l] shows a schematic perspective view of a friction braking system according to an exemplary embodiment. Fig. 2

[0089] [Fig.2] shows a schematic perspective view of an exemplary brake pad for the friction braking system of [Fig.l]. Fig. 3

[0090] [Fig.3] shows a schematic perspective view of a detail of the friction braking system of [Fig.l]. Fig. 4

[0091] [Fig.4] shows a schematic perspective view of a friction braking system according to another exemplary embodiment. Fig. 5

[0092] [Fig.5] shows a schematic perspective view of a closure part and the fluid communication means included in the friction braking system of [Fig.4]. Fig. 6

[0093] [Fig.6] shows a schematic perspective view of a friction braking system according to another exemplary embodiment. Description of the embodiments

[0094] [Fig.l] shows a schematic perspective view of an example of a friction braking device 10, in particular a disc brake. The device 10 can be used in a braking system, for example in a road vehicle (cars, buses, heavy goods vehicles, etc.) or railway vehicle (trains, trams, metros, etc.), but also in a stationary rotor machine, such as a wind turbine or an industrial machine.

[0095] The friction braking device 10 comprises a brake disc 12 and a brake assembly 14 which will be described in detail later.

[0096] As can be seen from [Fig.l], the disc 12 has a substantially annular shape extending in a first axial direction A. The disc 12 is for example made of metallic material. The brake disc 12 is configured to rotate about the axial direction A when the vehicle is in motion.

[0097] The brake assembly 14 extends along the axial direction A and comprises a caliper 16 and at least one brake pad 18. In this case, two brake pads 18 are provided in the assembly 14. The brake assembly 14 also comprises at least one fluid communication means 19, as will be detailed.

[0098] The stirrup 16 may be a fixed stirrup or a floating stirrup. In the non-limiting example of [Fig.l], a cross-section of the stirrup 16 has a circular segment shape. The stirrup 16 comprises a side wall 20-1 and two transverse walls 20-2. The side wall 20-1 extends around the axial direction A. The transverse walls 20-2 extend substantially perpendicular to the axial direction A.

[0099] A housing 21 is delimited between the side walls 20-1 and transverse walls 20-2.

[0100] The side wall 20-1 of the stirrup 16 comprises an opening 22. The opening 22 opens directly onto the housing 21. As will be detailed, the opening 22 can be shaped to allow the installation and uninstallation of each plate 18 through it, without the need to completely dismantle the assembly 14 from the system 10.

[0101] As can be seen from [Fig.l], each pad 18 is installed in the housing 21, so that the side wall 20-1 of the caliper is radially outside the pads 18. A portion of the disc 12 is also received in the housing 21. This portion of the disc 12 is located axially between the two pads 18.

[0102] Now one of the plates 18 will be described with reference to [Fig.2], this description being transposable to any plate 18 provided in the system 10.

[0103] The plate 18 comprises a sole 24 (also called a “base”) and a lining 26.

[0104] The sole 24 comprises a first face 28 and a second face 30, a normal vector of which is substantially parallel to the axial direction A when the pad 18 is installed in the brake assembly 14. The first face 28 and the second face 30 are axially opposite each other. As can be seen from [Fig. 2], the first face 28 is fixed to the lining 26. The second face 30 may bear on the caliper 16, or on a piston (not shown) included in the caliper 16.

[0105] The sole 24 further comprises a peripheral edge 32 connecting the faces 28 and 30. The peripheral edge 32 comprises a first lateral face 34 and a second lateral face 36. When the plate 18 is installed in the assembly 14, the first lateral face 34 is a radially external face, while the second lateral face 36 is a radially internal face. As will be detailed, according to a non-limiting example, the radially external face 34 of the edge 32 is arranged radially opposite the opening 22 of the stirrup 16.

[0106] In [Fig.2], the radially external face 34 of the edge 32 of the sole 24 comprises two protrusions 42 projecting from this radially external face 34. The protrusions 42 extend substantially radially. Of course, the number of protrusions 42 in the figures is not limiting. Indeed, the plate 18 could comprise a single protrusion 42, or more than two protrusions 42 on the radially external face 34 of its edge 32. As will be detailed later, these protrusions 42 make it possible to connect the plate 18 to a spring for holding the plate 18 in position in the assembly 14.

[0107] The peripheral edge 32 further comprises a rear face 38 and a front face 40 which connect the faces 34, 36 of the edge 32 to each other.

[0108] A thickness of the sole 24 is for example between 3 mm and 10 mm. By “thickness of the sole” is meant here the dimension of the sole 24 in the axial direction A.

[0109] The sole 24 is advantageously made of metallic material, but this is not limiting.

[0110] The lining 26 is formed by a friction material, commonly called “ferodo”.

[0111] The lining 26 comprises a friction face 44 and a connecting face 46. The connecting face 46 is the face of the lining 26 connected to the first face 28 of the base 24. The friction face 44 is opposite the connecting face 46. A vector normal to the friction faces 44 and connecting face 46 is substantially parallel to the axial direction A when the pad 18 is installed in the brake assembly 14.

[0112] The lining 26 further comprises a peripheral edge 48 connecting the friction face 44 and the connecting face 46. The peripheral edge 48 extends, for example, substantially radially.

[0113] The peripheral edge 48 comprises a first lateral face 50 and a second lateral face 52. When the pad 18 is installed in the assembly, the first lateral face 50 is a radially outer face, while the second lateral face 52 is a radially inner face. The radially outer face 50 of the edge 48 may be arranged radially opposite the opening 22 of the stirrup 16.

[0114] The peripheral edge 48 further comprises a front face 56 and a rear face 54 which connect the faces 50, 52 of the edge 48 to each other.

[0115] The peripheral edge 32 of the sole 24 and the peripheral edge 48 of the lining 26 constitute an edge of the plate 18.

[0116] The friction face 44 is intended, during the braking phases, to come axially into contact with a face of the brake disc 12, which rotates about the axial direction A, as indicated previously. The friction face 44 of the lining 26 and the disc 12 release particles resulting from abrasion when the friction face 44 comes into contact with the brake disc 12 during the braking phase. This causes wear of the lining 26 and the disc 12. The thickness (i.e., the axial dimension) of the lining 26 therefore gradually decreases during the useful life of the pad 18. Generally, the particles released by the lining 26 and the disc 12 during the braking phases are polluting and toxic particles, for example fine particles. Also, in what follows, these particles resulting from the friction between the lining 26 and the disc 12 will also be called “polluting particles”.

[0117] As visible in [Fig.2], the lining 26 comprises a central groove 57 open on the friction face 44. The central groove 57 extends substantially axially in the thickness of the lining 26 and ends in a blind bottom. In other words, the central groove 57 does not pass through the entire thickness of the lining 26.

[0118] The central groove 57 separates the liner 26 into a first portion 62 and a second portion 64. In some cases, the central groove 57 may be arranged in a position on the liner 26 in which each of the first and second portions 62, 64 of the liner form one half thereof. In other words, the first and second portions 62, 64 are identical in shape and size. In other cases, the central groove 57 is substantially displaced toward one of the front 54 or rear 56 faces of the peripheral edge 48 of the liner 26, such that the portions 62, 64 of the liner 26 are different in shape and / or size.

[0119] As is apparent from [Fig.2], the lining 26 of the plate 18 is further provided with at least one groove 58 for collecting polluting particles resulting from the abrasion of the pad 18 and the disc 12 during braking phases. The at least one collection groove 58 is open on the friction face 44. In this case, a first collection groove 58-1 and a second collection groove 58-2 are provided.

[0120] In the example of [Fig.2], the first collection groove 58-1 and the second collection groove 58-2 advantageously have a curved shape. The first collection groove 58-1 comprises a first portion 66 and a second portion 68 each located in continuity with the other. The first portion 66 extends substantially parallel and adjacent to the first lateral face 50 of the peripheral edge 48 of the lining 26, while the second portion 68 extends substantially parallel and adjacent to the central groove 57. In the case of the second collection groove 58-2, the latter comprises a first portion 70 and a second portion 72 each located in continuity with the other. The first portion 70 extends substantially parallel and adjacent to the second lateral face 52 of the peripheral edge 48 of the lining 26.The second portion 72 extends substantially parallel and adjacent to the rear face 54 of the peripheral edge 48.

[0121] These curved shapes of the first and second collection grooves 58-1, 58-2 make it possible to improve the efficiency of the collection of polluting particles since a greater quantity of polluting particles is collected thanks to these shapes. In particular, thanks to these shapes of the collection grooves 58-1, 58-2, it is possible to collect the polluting particles before they reach the central groove 57, thus improving the efficiency of the collection of the polluting particles. This groove design can be preferred for a clockwise direction of rotation of the disc (an element of the disc first sees the groove 66, then the groove 57 and then the groove 72).

[0122] Of course, any other shape and number of collection grooves 58 is conceivable.

[0123] The plate 18 also comprises at least one orifice 74 fluidly connected to each collection groove 58. In this case, two orifices 74 are provided in each plate 18, without this being limiting. According to one example, the number of orifices 74 is equal to the number of collection grooves 58. Alternatively, the number of orifices 74 may be less than the number of collection grooves 58, a single orifice 74 being fluidly connected to several collection grooves 58. Alternatively, the number of orifices 74 may be greater than the number of collection grooves 58, several orifices being connected to a single collection groove 58. Each orifice 74 is advantageously arranged radially opposite the opening 22 of the caliper when the pad 18 is installed in the assembly 14. As will be detailed, each orifice 74 constitutes a passage through which the polluting particles collected in each groove 58 can be sucked.

[0124] According to one example, each orifice 74 opens directly onto the collection groove. 58 corresponding. Advantageously, each orifice 74 opens onto one of the ends of the at least one collection groove 58. The particles generated by the friction between the lining and the brake disc are therefore brought back to the end of each collection groove 58 for their suction.

[0125] Alternatively, a cavity may fluidly connect each orifice 74 to the corresponding collection groove 58.

[0126] According to the non-limiting example illustrated in Figures 1 to 3, each orifice 74 is formed in the first lateral face 34 of the peripheral edge 32 of the sole 24. As indicated, the radially external face 34 of the edge 32 is arranged radially opposite the opening 22 of the stirrup 16. Thus, each orifice 74 is also arranged radially opposite the opening 22. This makes it possible, as will be explained later, to connect each fluid communication means 19 to the plate 18 through the opening 22 of the stirrup. In other words, there is no need to expressly machine a cavity on the stirrup 16 dedicated to the passage of each fluid communication means 19 for its connection to the orifice of the plate 18.

[0127] As illustrated in [Fig.2], the orifices 74 may be arranged in the vicinity of the circumferential edges of the sole, for example at a distance from the circumferential edges which is less than 20% or less than 10% of the (circumferential) width of the plate 18.

[0128] In an alternative example not illustrated, each orifice 74 (or at least some of the orifices 74) can be arranged astride the sole 24 and the lining 26, in particular astride the first lateral face 34 of the sole 24 and the first lateral face 50 of the lining 26. Thus, it is possible to establish the connection between each fluid communication means 19 and each orifice 74 through the opening 22 of the stirrup 16.

[0129] In another alternative example not illustrated, each orifice 74 (or at least some of the orifices 74) can be provided entirely in the lining 26, in particular in the first lateral face 50 of the lining 26.

[0130] These alternative examples of positioning each orifice 74 can take place for example when the sole 24 is very thin. Advantageously, in all cases, each orifice 74 remains positioned below the wear limit dimension of the lining 26.

[0131] In the non-limiting example of [Fig. 2], a cannula 76 is fluidically connected to each orifice 74 of the wafer. In particular, each cannula 76 can be installed in the respective orifice 74, at least in part. Thus, as is apparent from [Fig. 2], each cannula 76 projects from its orifice 74 substantially radially. The cannula 76 can have an orientation forming an angle of between 110 and 170° with the surface at right angles to which it projects. A person skilled in the art will adapt the position and the orientation of the cannula depending in particular on the size of the stirrup.

[0132] Each cannula 76 can be screwed, welded, glued, force-fitted or mounted by shrink-fitting in the plate 18, in particular in each orifice 74, without this being limiting.

[0133] Preferably, the number of cannulas 76 is equal to the number of orifices 74 in the plate 18.

[0134] Advantageously, each cannula 76 is rigid. For example, each cannula 76 is made of metallic material.

[0135] As will be detailed, each cannula 76 is shaped to be connected to one of the fluid communication means 19. Thus, each cannula 76 makes it possible to fluidly connect each fluid communication means 19 to the respective orifice 74 of the plate 18 more easily and in a sealed manner.

[0136] Now one of the fluid communication means 19 will be described with reference in particular to [Fig. 3]. In this figure, two fluid communication means 19 are provided. These two means 19 being identical or similar, the following description is applicable to both.

[0137] The fluid communication means 19 comprises a suction pipe. This pipe may be a flexible or rigid pipe, or a pipe comprising flexible parts and rigid parts. The pipe is for example a pneumatic pipe.

[0138] The fluid communication means 19 comprises at least a first end 78 and a second end 80.

[0139] Each first end 78 is connected, directly or indirectly, to one of the orifices 74. For example, when the cannulas 76 described above are provided, the fluid communication means 19 is connected to one of the orifices 74 via the corresponding cannula 76. According to one example, the fluid communication means 19 can be clipped onto the corresponding cannula 76. Alternatively, the cannula 76 can be clipped onto the corresponding fluid communication means 19.

[0140] The second end 80 is intended to be connected to a vacuum source (not shown). The vacuum source is for example a suction device. The air is able to circulate in the fluid communication means 19 from the first end 78 to the vacuum source. Thus, the particles collected in each groove 58 can be sucked via the fluid communication means 19.

[0141] The fluid communication means 19 may comprise a main conduit 82 comprising the second end 80 and several branches 84, each branch 84 comprising one of the first ends 78. Thus, the same fluid communication means 19 may be connected to several orifices 74 arranged on the same plate 18 or on different plates 18. Each branch 84 opens onto the main conduit 82, such that the main conduit 82 and each branch 84 are fluidly connected.

[0142] In this case, the fluid communication means 19 comprises two branches 84 each comprising a first end 78. Thus, the same fluid communication means 19 can be connected to two orifices 74. In [Fig. 3], one of the branches 84 of the means 19 is connected to one of the orifices 74 of one of the plates 18, the other branch 84 being connected to one of the orifices 74 of the other plate 18.

[0143] Alternatively, when the fluid communication means 19 comprises a single first end 78, the means 19 may be devoid of branches 84, so that the first end 78 is included in the main conduit 82.

[0144] Advantageously, the fluid communication means 19 is shaped to be substantially axially extensible. In the example of the figures, the fluid communication means 19 is telescopic. In particular, the fluid communication means 19 comprises a first part 19-1 and a second part 19-2. The first part 19-1 comprises an end portion shaped to be received in an end portion of the second part 19-2 and to be able to slide therein substantially axially.

[0145] Advantageously, one of the two branches 84 is carried by the first part 19-1, and the other of the two branches 84 is carried by the second part 19-2.

[0146] According to an alternative example not illustrated, the fluid communication means 19 may comprise a bellows capable of extending and shortening in the axial direction. In such a case, advantageously, each of the two branches 84 is arranged on an opposite side of the bellows.

[0147] The fluid communication means 19 being substantially axially extensible, it therefore has a degree of freedom in a direction substantially parallel to the axial direction. Thus, when the fluid communication means 19 is connected to orifices arranged on the two pads 18, the fluid communication means 19 can follow the axial movement of the pads 18 between the braking and non-braking phases. In this way, the formation of a force couple between the pad 18 and the fluid communication means 19 is avoided, in particular after the braking phase when each pad 18 moves away from the disc 12.

[0148] More precisely, as during the braking phases the pads 18 move axially closer to each other, the fluid communication means 19 shortens axially. In particular, the end portion of the first part 19-1 is inserted more into the end portion of the second part 19-2, or the bellows contracts axially. On the contrary, outside the braking phases, as the pads 18 move axially away from each other, the fluid communication means 19 increases its axial dimension. In particular, the end portion of the first part 19-1 is partly removed from the end portion of the second part 19-2, or the bellows is deployed axially.

[0149] By virtue of being substantially axially extensible, the fluid communication means 19 can also axially follow the wear of each pad 18 due to friction with the disc 12 during braking phases.

[0150] As is clear from [Fig.l], the fluid communication means 19 passes through the opening 22 of the stirrup 16 to connect to each orifice 74 of the plate(s) 18 which corresponds to it. The fluid communication means 19 therefore connects radially to the edge of the plate(s) 18, in particular to the corresponding orifice(s) 74.

[0151] As indicated previously, advantageously the opening 22 of the caliper 16 is shaped to allow the installation and uninstallation of each pad 18. Also, to connect the fluid communication means to the orifices 74, it is not necessary to machine a cavity expressly dedicated to the connection of the fluid communication means 19 to the corresponding orifices 74. The manufacture of the brake assembly 14 is therefore simplified, more economical and there is no need to re-approve the caliper 16.

[0152] In the non-limiting example of Figures 1 and 3, the fluid communication means 19 further comprises a connecting member 86 making it possible to connect the fluid communication means 19 to a part for closing the opening 22 of the stirrup which will be described in detail later with reference to Figures 4 and 5. The connecting member 86 has, for example, a T shape projecting outside the fluid communication means 19 which carries it. In the example of the figures, the connecting member 86 is carried by the branch 84 of the first part 19-1 of the respective fluid communication means 19.

[0153] The assembly 14 may further comprise a locking device 88, visible in [Fig.l]. The locking device 88 is mounted opposite the opening 22 of the stirrup, as visible in particular in this [Fig.l].

[0154] The locking device 88 comprises a locking bar 90 and at least one locking spring 92. Preferably, the number of locking springs 92 is equal to the number of plates 18. Also, in this case, two locking springs 92 are provided in the assembly 14.

[0155] Each locking spring 92 is shaped to be arranged on the first lateral face 34 of the sole 26 of one of the plates 18. As can be seen in particular in [Fig. 3], each locking spring 92 comprises at least one hole 94 capable of receiving one of the protrusions 42. Preferably, the number of holes 94 in the spring 92 is equal to the number of protrusions 42 of the corresponding plate 18. Thus, each hole 94 can receive a respective protrusion 42.

[0156] The locking bar 90 extends substantially axially over the entire axial dimension of the opening 22 of the stirrup 16.

[0157] A first end of the locking bar 90 is connected to a first edge 95 of the opening 22 which is included in a plane substantially perpendicular to the axial direction A. The first edge 95 comprises a connecting zone 96 crossed by a cavity substantially parallel to the first edge 95. In the figures, the connecting zone 96 projects substantially radially towards the outside of the stirrup 16, but this is not limiting.

[0158] The first end of the locking bar 90 may be connected to the first edge 95 from a pin 98 which passes through the cavity of the connecting zone 96. The pin 98 is advantageously removably mounted in the connecting zone 96. Preferably, the connection between the pin 98 and the connecting zone 96 is a pivot connection with an axis substantially parallel to the axis of the cavity of the connecting zone 96.

[0159] A second end of the locking bar 90 which is axially opposite its first end is connected to a second edge 99 of the opening 22 which is axially opposite the first edge 95. According to a non-limiting example, to connect this second end to the second edge 99, the axial dimension of the bar 90 is chosen so that the second end of the locking bar 90 is pressed substantially axially against the second edge 99. Thus, the connection between the second end of the bar 90 and the second edge 99 is removable and can be made without using additional means to maintain it.

[0160] In the example of [Fig. 1], the locking bar 90 is placed at a substantially central position of the opening 22. In particular, in this example the locking bar 90 is placed between the two fluid communication means 19.

[0161] Each plate 18 is pressed radially towards the inside of the housing 21 by means of the locking bar 90. For example, the locking bar 90 exerts a force on each locking spring 92 which is directed radially towards the inside of the housing 21. The movement of each plate 18 radially towards the outside of the housing 21 is thus limited by means of the locking device 88. In particular, by means of this locking device 88, each plate 18 is prevented from spontaneously disengaging from the assembly 14 through the opening 22 of the stirrup 16.

[0162] As previously indicated, the two ends of the bar 90 are removably connected to the caliper 96. Also, to replace each brake pad 18, the locking bar 90, as well as the respective spring 92 can be removed from the assembly 14. Each pad 18 can thus be uninstalled from the assembly 14 through the opening 22 and be replaced by a new pad 18, without it being necessary to carry out a more significant disassembly of the assembly 14. It is also noted that, since the connection between the pin 98 and the connection zone 96 is a pivot connection, it is also possible to remove and replace each plate 18 without needing to completely detach the locking bar 90 from the assembly 14. Indeed, it is sufficient to rotate the locking bar 90 around the axis of the pivot connection to release the opening 22 and thus be able to uninstall and / or install a plate 18 through the opening 22.

[0163] Advantageously, the locking device 88, and in particular its bar 90 and its springs 92, are designed to deform elastically when they are subjected to stresses in the assembly 14.

[0164] It is noted that the locking device 88 may serve to connect each fluid communication means 19 to the brake assembly 14, thereby reducing the risk of disengagement of each fluid communication means 19 from the brake assembly 14. For example, each fluid communication means 19 may be connected to the locking bar 90.

[0165] Reference is now made to Figures 4 and 5. [Fig.4] shows a brake assembly 14 identical or similar to that of [Fig.l] but further comprising a closing part 100 of the opening 22 of the caliper 16.

[0166] The closing piece 100 closes the opening 22. Preferably, as visible in [Fig.5], the closing piece 100 covers the entire opening 22, without this being limiting.

[0167] The closure part 100 comprises a sheet metal, made for example of metallic material. As visible in the non-limiting example of Figures 4 and 5, the sheet metal may have a cross-section in the shape of an arc of a circle. This makes it possible to have a sufficiently wide space between the closure part 100 and the opening 22 so that each fluid communication means 19 is also covered by the closure part 100.

[0168] As can be seen from [Fig.4], the closure part 100 comprises at least one groove 102. Preferably, the closure part 100 comprises a number of grooves 102 equal to the number of fluid communication means 19. In this case, two grooves 102 are provided. Each groove 102 is shaped to receive, at least in part, one of the fluid communication means 19. In the example of the figures, each groove 102 has a shape complementary to the shape of the second part 19-2 of each fluid communication means 19. Also, the second part 19-2 of each means 19 can be installed in the respective groove 102. According to one example, the second part 19-2 can be snapped into the groove 102. Advantageously, each groove 102 is sized so that a clearance exists between the part of the fluid communication means 19 installed in the groove 102, in this case the second part 19-2, and an internal wall of this groove 102.Thanks to this game, it is possible to limit the movements of the second part 19-2 of each means of communication 19 once installed in the throat, while allowing a certain . mobility of the medium 19 limited to the dimensions of the game.

[0169] The closure part 100 may further comprise at least one opening 104. Preferably, the closure part 100 comprises a number of openings 104 equal to the number of fluid communication means 19. In this case, two openings 104 are provided. Each opening 104 is shaped and positioned to allow the passage, at least in part, of one of the fluid communication means 19. In the example of FIGS. 4 and 5, each opening 104 is shaped to allow the passage of the first part 19-1 of a respective means 19. Thus, the first part 19-1 of each fluid communication means 19 can exit the space delimited between the opening 22 and the closure part 100. Thus, the second end 80 of each fluid communication means 19 is accessible for its connection to the vacuum source. In the example of figures 4 and 5, each opening 104 is axially in the continuity of a respective groove 102.

[0170] To maintain the closing part 100 in position relative to the stirrup 16, several configurations are possible.

[0171] According to a first configuration, the closing part 100 is elastically deformable, which allows it to be force-fitted into the opening 22 of the stirrup.

[0172] According to another configuration, the closing part 100 is made in one piece with the locking device 88, in particular with the locking bar 90. Thus, the connection described above of the locking bar 90 on the stirrup 16 also makes it possible to keep the closing part 100 in position relative to the stirrup 16.

[0173] According to another configuration, a toad-type or, in other words, a pinching attachment can be used to hold the closing part 100 in position relative to the stirrup 16.

[0174] According to another configuration, the closure piece 100 may be an individual piece connected to the locking bar 90. The closure piece 100 may be assembled around the locking bar 90 before the locking bar 90 is arranged between the edges 95, 99 of the opening 22. For example, the closure piece 100 may be shaped to slide along the locking bar 90 until it reaches its final position on the bar 90. Once in this position, the bar 90, connected to the closure piece 100, may be arranged between the edges 95, 99 of the opening 22 as previously described. Finally, the closure piece 100 can be screwed to the locking bar 90. Figures 4 and 5 show recesses or counterbores which illustrate an example of positioning of the screws (not shown) which can engage in tapped holes formed in the locking bar 90.

[0175] Of course, these configurations for holding the closing part 100 in position on the stirrup 16 can be combined with each other to the extent that they do not are not incompatible.

[0176] The closing part 100 comprises at least one slide 106, visible in [Fig.5]. Advantageously, the number of slides 106 is equal to the number of fluid communication means 19 in the assembly 14. Also, in this case, two slides 106 are provided. Each slide 106 extends substantially axially. In particular, each slide 106 comprises two rails 107 extending substantially axially.

[0177] As is clear from [Fig. 5], each slide 106 is shaped to receive the connecting member 86 of a respective fluid communication means 19. As indicated previously, this connecting member 86 is preferably carried by the first part 19-1 of the fluid communication means 19, in particular by the branch 84 of this first part 19-1. Advantageously, the dimensions of each slide 106 and of each connecting member 86 allow the connecting member 86 to be able to move axially in the slide 106. Thanks to this possibility of axial movement of the connecting member 86 in the slide, the fluid communication means 19 can be easily installed in the closing part 100, as will be detailed.Furthermore, this axial movement allows the fluid communication means 19 to follow the movement of the pads 18 which takes place during and after the braking phases, as well as the movement of the pads 18 which takes place due to their wear, as explained previously.

[0178] Thanks to each connecting member 86 and each slide 106, the closing part 100 and each fluid communication means 19 can be secured. The closing part 100 and each fluid communication means 19 are thus connected in such a way that each fluid communication means 19 is held in position relative to the closing part 100.

[0179] In order to facilitate the insertion of each connecting member 86 into the respective slide, the slide 106 comprises an opening 108. In the example of [Fig.5], to form this opening, the two rails 107 of the slide are interrupted at a location of their axial dimension. Alternatively, only one of the rails 107 could be interrupted at a location of its axial dimension.

[0180] Each fluid communication means 19 can be installed in the closure part 100 in the following manner: firstly, the first part 19-1 of the fluid communication means 19 is connected to the closure part 100. For this purpose, the connecting member 86 carried by the first part 19-1 is introduced into the respective slide 106 through the corresponding opening 108, and the second end 80 of the fluid communication means 19 is extracted towards the outside of the closure part 100 through the corresponding opening 104. Then, the first part 19-1 is moved axially by sliding the connecting member 86 in the slide 106. This axial displacement is in particular made in a direction causing the second end 80 of the fluid communication means 19 to be further extracted towards the outside of the closing part 100 through the opening 104. The second part 19-2 of the fluid communication means 19 is then installed in the respective groove 102. Finally, the first part 19-1 is again axially displaced by sliding the connecting member 86 in the slide 106. This time, this axial displacement is made in a direction causing the end portion of the first part 19-1 shaped to be received inside the second part 19-2 to be effectively introduced inside this second part 19-2.

[0181] The closing part 100 makes it possible to prevent the plates 18 and the fluid communication means 19 present in the assembly from disengaging from the latter.

[0182] [Fig.6] shows a variant for fixing the fluid communication means 19. In this example, a support 110 is fixed to the caliper. The support 110 has a central branch 112 which overhangs the opening 22 and which can be arranged on the holding bar 90. The support 110 can have one or more branches 114 which can match the profile of the caliper 16 or match the volume swept by the wheel mounted around the caliper. The support 110 extends mainly over an axially inner part (inner side of the vehicle) of the caliper. A mechanism 116 for fixing the fluid communication means 19 to the support 110 is shown in an enlarged part of [Fig.6]. In particular, an example of possible fixing can be seen, by clipping the fluid communication means 19 into a clamp.

[0183] The support 110 may have an orifice 118 coaxial with an orifice 120 of the stirrup 16. This may in particular make it possible to couple the support to the stirrup by means of an axis (not shown) which makes it possible to fix or slide the stirrup.

[0184] In one configuration, the support 110 and the closing part 100 shown in Figures 4 and 5 may constitute a single part.

[0185] [Fig.6] also illustrates the fact that a tab 124 can be fitted to the fluid communication means 19. This tab 124 can have an L shape. It can overhang the spring 92. The tab 124 comes into axial contact with the spring 92. Thus, when the plate 18 moves axially, the tab follows the movement of the plate. This allows good control of the deformation of the fluid communication means 19.

[0186] The fluid communication means 19 may comprise segments 122 that are more flexible than others, in particular made of silicone or other elastomeric materials. It is indeed not necessary for the entirety of the fluid communication means 19 to be flexible and it may be advantageous for certain parts of the fluid communication means 19 to be more rigid than others. The flexible pipe segments 122 can be relatively linear tubular segments in their resting state (excluding braking phases). When it elastically returns to the resting state after braking, the flexible hose, for example made of silicone, can assist in the release of the pads or at least promote the reduction of the residual friction torque.

[0187] The fluid communication means 19 may comprise segments of rigid tubing, in particular the cannulas or other portions of the fluid communication means 19. The flexible segments 122 are connected to the rigid segments by any suitable means. The rigid segments may for example include a flexible conduit lined inside a rigid tubular envelope. The lined flexible conduit of a rigid segment may be made of the same material as the flexible segments (for example silicone). Optionally, the same flexible pipe runs through the rigid portions and the flexible portions, the rigid portions being portions of pipe lined with a rigid sleeve for example made of stainless steel.

[0188] The present disclosure may also relate to the following items, considered alone or according to all technically possible combinations of items or all possible combinations with the aspects or examples mentioned above or the appended claims:

[0189] Item 1. Closing part intended to cover substantially the entirety of an opening of a stirrup, the closing part comprising arrangements for receiving a fluid communication means for suctioning particles.

[0190] Item 2. Closing part according to item 1, comprising at least one groove shaped to receive, at least in part and optionally in a snap-fit ​​manner, the fluid communication means.

[0191] Item 3. Closing part according to one of the preceding items, the closing part comprising at least one opening, in particular of the notch type. A notch can allow a fluid communication means to pass through. Another notch can receive a platelet holding bar. According to one example, each opening of the closing part is axially in the continuity of a respective groove.

[0192] Item 4. Closing part according to one of the preceding items, the part comprising a gutter supporting a fluid communication means (see [Fig.5] below element 82).

[0193] Item 5. Closing part according to one of the preceding items, comprising at least one slide shaped to receive a connecting member carried by the at least one fluid communication means, the connecting member being received in the at least one slide so as to be able to slide inside the at least one slide.

[0194] Item 6. Closing part according to one of the preceding items, comprising two through-holes offset axially and circumferentially (in the reference of the brake disc).

[0195] Item 7. Closing part according to one of the preceding items, comprising two radially internal bosses offset axially and circumferentially.

[0196] Item 8. Fluid communication means for suctioning dust into a brake, comprising at least one segment made of silicone.

[0197] Item 9. Fluid communication means for suctioning dust into a brake, comprising a tab intended for axial contact with a spring disposed on a radially outer edge of a brake pad.

[0198] Item 10. Brake pad comprising a lining provided with a brake dust collection groove and a base supporting the lining and having an orifice arranged on a radially external or internal, or circumferential edge, the orifice being in fluid connection with the groove.

[0199] Item 11. Plate according to item 10, comprising a cannula screwed, welded, glued or force-fitted into the plate, in particular into the at least one orifice. The cannula may be metallic or plastic.

[0200] Item 12. Kit comprising a brake pad on a radially external edge of which a spring is arranged, and a particle suction pipe comprising a tab intended to come into axial support on the spring.

[0201] Item 13. Mounting bracket for a particle suction line, the bracket comprising means for attachment to a particle suction line.

[0202] Item 14. Support according to item 13, having a general Y shape with a central branch comprising the means of attachment to the suction pipe and two branches ending in an orifice intended for the attachment of the support to a brake caliper.

[0203] Item 15. Method of installing brake pads in a disc brake, the brake comprising a caliper provided with an opening of sufficient size to extract and insert the pads without removing the caliper, the method comprising inserting the pads into the caliper through the opening, then connecting fluid communication means to the pads, in particular to a radially external edge of the pads' soles, preferably by connection to cannulas secured to the soles.

[0204] The present disclosure is not limited to the examples of brake assemblies described above, solely by way of example, but it encompasses all the variants that a person skilled in the art may envisage within the framework of the protection sought.

Claims

Claims

1. Brake assembly (14) for a friction braking device (10), the assembly (14) extending in a first axial direction (A), the assembly (14) comprising: - at least one brake pad (18) comprising a base (24) and a lining (26) made of friction material, said lining (26) comprising a friction face (44) intended to come into contact with a brake disc (12), the lining (26) being provided with at least one particle collection groove (58) open on said friction face (44), the at least one pad (18) comprising at least one orifice (74) in fluid communication with said at least one collection groove (58), the at least one orifice (74) opening onto an edge (32, 48) of the at least one pad (18);- a brake caliper (16) comprising an installation housing (21) for the at least one pad (18), said caliper (16) comprising an opening (22) located opposite the at least one orifice (74) in a radial direction substantially perpendicular to said first axial direction (A); and - at least one fluid communication means (19) comprising at least one first end (78) connected to said at least one orifice (74) through said opening (22) of the caliper (16), and a second end (80) intended to be connected to a vacuum source.;

2. Assembly (14) according to claim 1, in which the at least one orifice (74) is provided in a first face (34) of a peripheral edge (32) of said sole (26), said first face (34) of said peripheral edge (32) being arranged radially opposite said opening (22) of the stirrup (16).

3. Assembly (14) according to one of the preceding claims, further comprising a cannula (76) projecting substantially radially from the at least one orifice (74), said cannula (76) being shaped to be connected to the at least one fluid communication means (19).

4. Assembly (14) according to one of the preceding claims, in which the at least one fluid communication means (19) comprises a plurality of branches opening onto a main conduit.

5. Assembly (14) according to one of the preceding claims, in which the at least one fluid communication means (19) is shaped to be substantially axially extensible.

6. Assembly (14) according to one of the preceding claims, further comprising a locking device (88) for locking the at least one plate (18) in a radial position in said installation housing (21), said locking device (88) being connected to the stirrup (16) opposite said opening (22), the at least one fluid communication means (19) being fixed to said locking device (88).

7. Assembly (14) according to one of the preceding claims, further comprising a closing part (100) of said opening (22), the at least one fluid communication means (19) being connected to said closing part (100).

8. Assembly (14) according to claim 7, in which the closing part (100) comprises at least one slide (106) shaped to receive a connecting member (86) carried by the at least one fluid communication means (19), the connecting member (86) being received in the at least one slide (106) so as to be able to slide inside the at least one slide (106).

9. Assembly according to one of the preceding claims, in which the stirrup (16) comprises at least one bore (120) for fixing or sliding the stirrup (16), the assembly comprising a support (110) for the fluid communication means (19), the support (110) having at least one orifice (118) coaxial with the at least one bore (120).

10. An assembly according to any preceding claim, wherein the fluid communication means (19) comprises elastomeric pipe segments (122).

11. Assembly according to one of the preceding claims, in which a spring (92) is attached to a radially external edge of the at least one plate (18) and the fluid communication means (19) comprises a tab (124) bearing axially on the spring (92).

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