Friction brake device

Abstract

The invention relates to a friction brake device (10) comprising a caliper (12), at least one pad (16) movable in translation along an axis (A) relative to the caliper (12), said pad (16) being intended to cooperate with a brake disc, and at least one piston (14) movably mounted on the caliper (12) and capable of axially moving said pad (16) in translation, said pad (16) comprising at least one particle suction zone (28), the invention relates to a device (10) for sucking particles in a particle suction area (28), said particle suction area (28) comprising a suction inlet (30), characterized in that the device (10) further comprises a suction tube (60) secured to a piston (14), said suction tube (60) comprising an end capable of sealingly supporting a gasket (16), said end being opposite said suction inlet (30) of the gasket (16) in order to connect said suction tube (60) and said suction area (28) of the gasket (16).

Description

Technical Field

[0001] The present invention relates to the field of friction brake devices. Background Art

[0002] The invention relates to a friction brake device intended to be fitted, for example, to a road or rail vehicle, or to a stationary machine comprising a rotor, such as a wind turbine or an industrial machine.

[0003] This type of braking device is particularly known from document FR 3 057 040 B1 in the name of the applicant. This latter device typically comprises a so-called floating caliper, intended to be mounted on a fixed caliper bracket, and two pads, one mounted on opposite sides of a brake disc rigidly connected to a vehicle wheel or a fixed machine rotor. Specifically, the device comprises a so-called inner pad, which is moved translationally by a piston and is intended to contact a first surface of the brake disc, and a so-called outer pad, which is intended to contact a second surface of the brake disc opposite the first. The piston includes a portion that is subjected to the pressure of a hydraulic fluid, such as oil, within a pressure chamber. Increasing the pressure in this chamber causes the piston to move axially relative to the caliper, pushing the inner pad toward the first surface of the brake disc. Simultaneously, the rear portion of the floating caliper pushes the outer pad toward the second surface of the brake disc. The brake disc is thus braked by the resistance torque generated by the friction of the pads against the corresponding surfaces.

[0004] If the pressure in the chamber decreases, the piston retracts and the floating caliper moves to release the pads. Due to the slight natural runout of the brake disc, the pads can move away from the disc as it rotates.

[0005] Each pad comprises a base and a friction lining. The lining is intended to come into contact with the brake disc and, over time, wears out due to wear. Wear of the lining generates potentially harmful dust particles. To limit the emission of such particles, it is known to provide a device for collecting and extracting the emitted particles. To this end, each pad includes a groove in the lining near a side edge thereof, and a suction port that opens into the groove and, on the side opposite the groove, axially toward the base. A flexible tube connects each suction port to the extraction and filtration device.

[0006] During operation, the flexibility of the tubing can compensate for any axial movement of the pads caused by piston movement and / or gradual pad wear. However, such tubing has a spring effect that tends to exert undesirable axial forces on the pads, which can cause them to move toward or away from the brake disc in an uncontrolled manner. This can lead to premature pad wear or inadequate control of the braking torque. Summary of the Invention

[0007] The present invention improves this situation.

[0008] The present invention proposes a friction brake device, which includes a caliper, at least one pad and at least one piston, at least one pad moving translationally relative to the caliper along a moving axis, the pad being intended to cooperate with a brake disc, and at least one piston movably mounted on the caliper and capable of causing the pad to move axially translationally, the pad including at least one particle suction area including a suction port, characterized in that the device also includes a suction pipe fixed to the piston, the suction pipe including an end portion suitable for contacting the pad in a sealed manner, the end portion being opposite to the suction port of the first pad so as to connect the suction pipe and the suction area of ​​the pad.

[0009] Therefore, the suction pipe is fixed to the piston instead of the at least one liner, with the result that the suction pipe does not exert an axial force on the corresponding liner. This avoids the above-mentioned disadvantages of the prior art.

[0010] The suction pipe can be fixed to the piston directly or indirectly, ie fixed via an additional component. The end of the suction pipe can rest against the gasket in a sealing manner directly or indirectly.

[0011] The corresponding end of the suction pipe is able to bear against the pad in a sealing manner during braking, i.e. when the piston abuts against the pad to push it axially towards the brake disc. During these braking phases, particles are generated and must be sucked away. It is during these phases that a seal is provided between the pipe and the pad's suction zone by the sealing abutment.

[0012] A seal is still provided between the braking phases, which enables particles to be sucked away after braking, at least during a so-called cleaning phase following the braking phase.

[0013] The suction tube can have a first end fixed directly or indirectly to the piston, and a second end intended to be connected to the suction and filtering device.

[0014] In this context, "axially" is understood to mean "approximately parallel to the axis of movement".

[0015] According to one aspect, the end of the suction pipe can be rigidly connected to a bracket that is fixed to the piston. The bracket can be in the form of a metal sheet. The bracket may include a central opening through which the piston passes. The bracket can be fixed to the piston, for example, by threading, riveting, or welding.

[0016] According to one aspect, the bracket can comprise a port facing the respective end of the duct, the bracket being adapted to bear against the gasket in a sealing manner such that the suction opening in the gasket and the port in the bracket are opposite each other.

[0017] According to one aspect, the suction tube can comprise at least a rigid portion fixed to the piston, and a flexible portion adapted to allow an axial movement of the piston.

[0018] Furthermore, in contrast to the prior art, the suction tube is not flexible along its entire length, which reduces its spring effect on the liner. While the axially extendable, flexible portion allows the suction tube to compensate for axial movement of the liner, the spring effect on the liner and piston is limited because the first rigid portion is fixed to the piston. Consequently, the residual torque in the brake device is reduced compared to the prior art.

[0019] It should also be noted that due to the shortened length of the flexible portion, the suction pipe can be more resistant to high temperatures. In fact, the melting point of the rigid portion can be higher than the melting point of the flexible portion.

[0020] Herein, "rigid portion" refers to a portion of the suction pipe whose axial dimension does not change when the piston moves the liner axially. Herein, "flexible portion" refers to a portion of the suction pipe whose axial dimension is adapted to change when the piston moves the liner axially.

[0021] The rigid portion may be directly fixed to the piston. For example, the rigid portion may be integral with the piston. Alternatively, the rigid portion may be indirectly fixed to the piston. For example, the rigid portion may be fixed to the bracket.

[0022] The suction tube can comprise two rigid parts and at least one flexible part located between the rigid parts.Thus, when the piston is retracted, the flexible part can be contracted between the first rigid part and the second rigid part.

[0023] Specifically, the flexible portion can be axially extendable. The flexible portion can be made of an elastomeric material, such as rubber. Therefore, the flexible portion can exhibit elastic behavior.

[0024] The arms extending in a generally L-shape can secure the suction tube, in particular one of its rigid portions, to the caliper.

[0025] According to one aspect, the flexible portion can comprise at least one bellows.

[0026] Since the bellows comprises corrugations, the flexible portion is able to follow the axial movement of the corresponding pad (caused by the piston and brake disc runout) without being subjected to high traction forces that could cause the flexible portion to break. Alternatively, the flexible portion can be replaced by a telescopic flexible or rigid portion.

[0027] According to one aspect, the caliper can be a floating caliper capable of axial translational movement relative to the caliper support, the device comprising a so-called first inner pad and a so-called second outer pad, the first pad being directly driven by the piston and the second pad being directly driven by the rear of the floating caliper, the first suction pipe being connectable to the suction area of ​​the first pad and the second suction pipe being connectable to the suction area of ​​the second pad.

[0028] This configuration with a floating caliper can directly drive the first pad and indirectly drive the second pad through the floating caliper.

[0029] The particles emitted by each pad are sucked through a dedicated suction pipe.

[0030] According to one aspect, the rear portion of the floating caliper may include a suction port, a second suction pipe being connected to the suction port of the floating caliper, and the suction port of the floating caliper being able to rest against the second liner in a sealing manner, opposite to the suction port of the second liner, so as to connect the second suction pipe and the suction area of ​​the second liner.

[0031] As previously mentioned, the suction port of the caliper can be adapted to bear in a sealing manner against the suction port of the second pad when particles are generated.

[0032] The second conduit can be made entirely of one or more rigid parts and have no flexible parts. For example, the second suction pipe can be made in the floating casting of the caliper. Specifically, the second conduit can be integrated with the floating casting of the caliper.

[0033] Therefore, the seal between the second suction pipe and the second pad is ensured by the sealing abutment engagement between the suction port of the caliper and the suction port of the second pad. This therefore reduces the number of components in the brake device.

[0034] The second suction pipe can have a first end that is directly or indirectly fixed to the caliper, and a second end that is intended to be connected to the suction and filtration device. It should be noted that because the second suction pipe is fixed to the caliper, it prevents the second suction pipe from applying force to the second pad. In practice, the second suction pipe is not directly fixed to the second pad, but rather provides a caliper suction port for suctioning brake-generated particles.

[0035] The diameter of the second pad's suction port can be smaller than that of the caliper's. This ensures that the maximum amount of particles emitted during the engagement of the second pad with the brake disc are drawn into the second suction pipe. In practice, if the caliper's suction port and the second pad's suction port have the same or smaller diameter, the risk of particles accumulating at the interface between the two ports is very high.

[0036] In some cases, the first portion of the suction port of the caliper includes a generally annular shoulder shaped to receive the suction tube.

[0037] This improves the seal between the caliper and the second suction pipe, since the second suction pipe is partially inserted into the suction port of the caliper. This reduces the risk of particles being discharged to the outside of the brake device at the interface between the caliper and the second suction port.

[0038] The first end portion specifically corresponds to the end of the caliper's suction port opposite the second liner. Due to the shoulder, the diameter of the caliper's suction port is increased at its first end portion. Thus, the second suction pipe can be accommodated in the caliper's suction port while ensuring that the diameter of the passageway through which particles flow in the suction pipe is equal to or greater than the diameter of the caliper's suction port. This reduces the risk of particles accumulating at the interface between the caliper's suction port and the second suction pipe.

[0039] The second suction tube can in particular be a close fit or tight fit in the shoulder.

[0040] The second suction pipe can be fixed to the caliper by at least one detachable connecting member. Therefore, in the event of wear, the second suction pipe can be easily replaced. For example, the second suction pipe can be threadedly connected to the caliper.

[0041] The suction port of the second gasket may be located in a first surface of the second gasket, the first surface of the second gasket being made of metal and resting in a sealing manner against the metal first surface of the caliper, the suction port of the caliper opening being directed toward the metal first surface. Thus, the seal between the second gasket and the caliper is ensured by metal-to-metal contact.

[0042] According to one aspect, the caliper can be a so-called fixed caliper, the device comprising a so-called first inner pad located on the vehicle side and a second outer pad located on the rim side, each pad being directly driven by at least one piston, a first suction pipe being connectable to the suction area of ​​the first pad and a second suction pipe being connectable to the suction area of ​​the second pad.

[0043] In this fixed caliper configuration, each pad is driven by at least one dedicated piston.

[0044] As previously mentioned, the particles emitted by each pad are suctioned through a dedicated pipe.

[0045] According to one aspect, each suction tube can be fixed to a respective piston, each suction tube comprising an end adapted to rest in a sealing manner against a respective pad, opposite said suction opening of the respective pad, so as to connect the suction tube to said suction zone of the respective pad.

[0046] The present application also relates to a brake system comprising a brake disc and a friction brake device of the above type.

[0047] The present application also relates to a vehicle comprising a braking system of the above-mentioned type.

[0048] The application also relates to a stationary machine comprising a rotor and a braking system of the type described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Other features, details, and advantages will become more apparent upon reading the following detailed description and analyzing the accompanying drawings, in which:

[0050] Figure 1

[0051] [ Figure 1 ] is a schematic perspective view of an embodiment of a friction brake device.

[0052] Figure 2

[0053] [ Figure 2 ]yes Figure 1 Schematic side view of the friction brake device in.

[0054] Figure 3

[0055] [ Figure 3 ]yes Figure 1 Another schematic perspective view of the friction brake device in FIG.

[0056] Figure 4

[0057] [ Figure 4 ]yes Figure 1 Schematic front cross-sectional view of the friction brake device in.

[0058] Figure 5

[0059] [ Figure 5 ]yes Figure 1 Another schematic front sectional view of the friction brake device in FIG.

[0060] Figure 6

[0061] [ Figure 6 ]yes Figure 1 Schematic perspective view of a portion of a friction brake device in FIG, comprising a first pad, a piston and a suction pipe connected to a bracket surrounding the piston.

[0062] Figure 7

[0063] [ Figure 7 ] is connected to Figure 6 Schematic perspective view of the suction pipe of the shown bracket.

[0064] Figure 8

[0065] [ Figure 8 ]yes Figure 1 Schematic partial side cross-sectional view of the friction brake device in FIG, showing the second pad of the device.

[0066] Figure 9

[0067] [ Figure 9 ] is a schematic perspective view of another embodiment of a friction brake device. DETAILED DESCRIPTION

[0068] Figure 1 is a schematic perspective view of an example of a friction brake device 10. The device 10 may be used, for example, in a braking system of a road or rail vehicle, or a braking system of a stationary machine comprising a rotor, such as a wind turbine or an industrial machine.

[0069] The friction device 10 includes a caliper 12. Figures 1 to 8 In the embodiment, the caliper 12 is a floating caliper, but it can also be a fixed caliper, as will be described in detail below. If the caliper 12 is a floating caliper, it can move in translation relative to the caliper bracket (not shown) on which it is mounted.

[0070] The caliper 12 comprises a fixed portion 13A and a floating casting 13B, both of which are Figure 2 Visible in.

[0071] The device 10 also includes a piston 14 mounted on the caliper 12. The piston 14 may include a portion that is subjected to pressure from a hydraulic fluid (e.g., oil) within a pressure chamber. Increasing the pressure within the chamber causes the piston 14 to move in an axial direction A relative to the caliper. Hereinafter, "axial" or "axially" means generally parallel to the direction A.

[0072] The device 10 includes a first pad 16, also referred to as an inboard pad. Specifically, the pad 16 may be disposed in a housing 17 in the front portion 19 of the caliper 12 (see FIG. Figure 4 ). For example, the liner 16 is installed directly opposite to the piston 14 in the axial direction. Specifically, as Figure 4 As can be seen in FIG, the pad 16 may be in contact with the piston 14. As described in detail below, the pad 16 is intended to cooperate with a brake disc (not shown).

[0073] The first gasket 16 includes a base 18 and a liner 20 .

[0074] The base 18 has an outer surface 22 and an inner surface 24 that are opposite to each other in the axial direction. The outer surface 22 abuts against the piston 14 and / or the caliper 12.

[0075] The thickness of the base 18 is, for example, between 3 mm and 5 mm. Herein, the “thickness of the base” refers to the dimension of the base 18 in the axial direction A.

[0076] The base 18 is preferably made of metal.

[0077] A lining 20 is secured to an inner surface 24 of the base 18. The lining 20 is formed from a material commonly referred to as a friction material.

[0078] The lining 20 comprises a friction surface 26 axially opposite the surface of the lining 20 fixed to the base 18 . During the braking phase, the friction surface 26 is intended to bear axially against a first surface of a brake disc that rotates about an axis that is substantially parallel to the axial direction A. Specifically, when the piston 14 moves in the direction A towards the brake disc, the friction surface 26 bears against the first surface of the brake disc.

[0079] During braking, when the friction surface 26 abuts the brake disc, the lining 20 and the brake disc release particles due to wear. This causes the lining 20 and the brake disc to wear. As a result, the thickness of the lining (i.e., the axial dimension) gradually decreases during the service life of the lining 16.

[0080] like Figure 4 As shown, the liner 16 includes a particle intake region 28. The particle intake region 28 includes an intake port 30 formed by a first cavity 32 in the base 18 and a recess 34 in the liner 20. For example, the intake port extends generally axially.

[0081] A first cavity 32 extends through the base 18, between its outer surface 22 and its inner surface 24, opposite at least a portion of a groove 34 in the lining 20. The groove 34 extends axially between the friction surface 26 and the second surface of the lining 20. In other words, the depth of the groove 34 is equal to the thickness of the lining 20. In addition, particles released by wear can be collected in the groove 34 and then drawn through the cavity 32 in the base 18.

[0082] The device comprises a first suction pipe 60 for sucking out particles collected in the recess 34. The first suction pipe 60 has a first end 62 and an opposite second end 63.

[0083] Especially Figure 5 As can be seen in the drawing, the first end 62 can be directly or indirectly sealed against the first pad 16. The end 62 is advantageously adapted to be sealed against opposite the suction opening 30 of the pad 16. The suction pipe 60 is thus connected to the suction zone 28 of the plate 16. This reduces the risk of particles being ejected to the outside due to wear when the pad 16 and the brake disc come into contact.

[0084] The end 62 of the suction pipe 60 advantageously bears in a sealed manner during the braking phase against the pad 16. In fact, as mentioned above, during the braking phase, the pad 16 bears axially against the brake disc, thus forming particles due to wear.

[0085] The seal between the suction pipe 60 and the pad 16 is also maintained between braking phases, at least during the cleaning phase following the braking phase. This enables the particles to be sucked away after braking.

[0086] The second end 63 of the pipe 60 is intended to be connected to a suction device (not shown). The suction device is composed of, for example, a suction and filtering device. Such a device is configured to suck particles formed by wear when the pad 16 and the brake disc come into contact.

[0087] In some cases, the conduit 60 may include at least one rigid portion 64 and at least one flexible portion 66. As used herein, a "rigid portion" refers to a portion of the conduit 60 whose axial dimension does not change when the piston 14 axially moves the liner 16. As used herein, a "flexible portion" refers to a portion of the conduit 60 whose axial dimension is adapted to change when the piston 14 axially moves the liner 16.

[0088] In the non-limiting example shown in the figures, the duct 60 includes a first rigid portion 64 - 1 , a second rigid portion 64 - 2 , and a flexible portion 66 located between the two rigid portions 64 - 1 , 64 - 2 .

[0089] The first rigid portion 64-1 has a first end corresponding to the first end 62 of the duct 60. Furthermore, the first end 62 of the first rigid portion 64-1 is adapted to bear directly or indirectly against the gasket 16 in a sealing manner, in particular opposite the suction opening 30 of the gasket 16.

[0090] As will be described in detail below, the first rigid portion 64 - 1 may be fixed to the piston 14 or directly to the liner 16 .

[0091] The first rigid portion 64-1 further has a second end 65 axially opposite to the first end 62. Figure 5 As can be clearly seen in FIG, the second end 65 is connected to the flexible portion 66.

[0092] The flexible portion 66 has a first end 67 and an axially opposed second end 69 .

[0093] The first end 67 is connected to the first rigid portion 64 - 1 . Specifically, the first end 67 of the flexible portion 66 is connected to the second end 65 of the first rigid portion 64 - 1 .

[0094] Second end 69 is intended to be connected to a device for extracting particles generated by wear. In the example shown here, the connection between second end 69 and the particle extraction device is an indirect connection via second rigid portion 64-2. However, in an example not shown, second end 69 of flexible portion 66 can be directly connected to the extraction device.

[0095] The flexible portion 66 is axially extendable. The flexible portion 66 can advantageously be made of an elastomeric material, such as rubber. Thus, the flexible portion 66 can exhibit elastic behavior capable of tracking the axial movement of the piston 14.

[0096] In the figures, the flexible portion 66 includes at least one bellows 70 with pleats.

[0097] The second rigid portion 64-2 has a first end 71. Figure 5 As clearly shown in FIG, the first end 71 is connected to the second end 69 of the flexible portion 66. Thus, the flexible portion 66 is disposed between the first rigid portion 64-1 and the second rigid portion 64-2. Thus, when the piston 14 is retracted, the flexible portion 66 can contract between the first rigid portion 64-1 and the second rigid portion 64-2.

[0098] The second rigid portion 64-2 further has a second end corresponding to the second end 63 of the above-mentioned pipe 60. In addition, the second end 63 of the second rigid portion 64-2 is intended to be connected to a suction device. For example, the second end 63 can be directly connected to the suction device.

[0099] Due to the presence of rigid portions 64 - 1 and 64 - 2 , pipe 60 is not flexible throughout its entire length, which reduces the spring effect of pipe 60 on liner 16 . Specifically, because first rigid portion 64 - 1 directly or indirectly seals against liner 16 and is directly or indirectly fixed to piston 14 , the spring effect applied to liner 16 is limited. Consequently, the residual torque in the brake device is reduced compared to the prior art.

[0100] Furthermore, it should be noted that the pipe 60 can have better heat resistance due to the shortened length of the flexible portion 66. In fact, the melting point of the rigid portions 64-1, 64-2 can be higher than the melting point of the flexible portion 66.

[0101] In the non-limiting embodiment shown in the figures, the suction pipe 60 is fixed to the piston 14. Specifically, the first rigid portion 64-1 of the pipe 60 is fixed to the piston 14. More specifically, the first rigid portion 64-1 can be fixed to the piston by its first end 62.

[0102] Therefore, the conduit 60 is fixed to the piston 14 rather than to the pad 16, with the result that the conduit 60 does not exert an axial force on the pad 16. This therefore prevents the pad 16 from moving uncontrolled toward or away from the brake disc, thereby reducing the risk of premature wear of the pad 16 and allowing for better control of the braking torque.

[0103] When the pipe 60 is fixed to the piston, its end 62 is advantageously able to bear in a sealed manner against the liner 16 opposite the suction opening 30. Thus, the first suction pipe 60 is connected to the suction opening 30 of the liner 16.

[0104] The pipe 60, in particular the first rigid portion 64-1 thereof, can be fixed directly to the piston 74. For example, the first rigid portion 64-1 can be integral with the piston 14.

[0105] Alternatively, the first rigid portion 64-1 of the pipe 60 may be indirectly fixed to the piston 14. For example, as shown in the figure, the first rigid portion 64-1 may be indirectly connected to the piston via an additional component 74. The additional component 74 may be a bracket fixed to the piston 14 by threading, riveting, or welding.

[0106] The bracket 74 may be in the form of a metal sheet. Figure 7 As shown in FIG, the bracket 74 includes a central opening 75. Figure 6 It can be seen in particular that the piston 14 passes through this opening 75 .

[0107] The end 62 of the duct 60 is rigidly connected to the bracket 74. The bracket 74 may include a port 76 facing the end 62 of the duct 60. The bracket 74 can thus rest against the liner 16 in a sealing manner such that the suction opening 30 of the liner 16 and the port 76 of the bracket are opposite each other.

[0108] In an alternative embodiment not shown, the duct 60 can be fixed directly to the liner 16. As previously described, the end 62 of the duct 60 can then rest in a sealing manner against the first liner 12, opposite the suction opening 30. Thus, the first suction duct 60 is connected to the suction zone 30 of the liner 16.

[0109] As can be seen in the figures, the caliper may further include an L-shaped arm 78 that enables the pipe 60 to be secured to the caliper 12. The arm 78 preferably secures one of the rigid portions 64 to the caliper 12, in this case the second rigid portion 64-2.

[0110] A second pad 36, also referred to as an outboard pad, is provided in the device 10. The second pad 36 may be disposed in a housing 37 in the rear portion 39 of the caliper 12. As shown in the figures, in particular as Figure 4 As shown in FIG, the second pad 36 faces the first pad 16 in the axial direction. A space 21 is formed between the two pads 16, 36, which is intended to accommodate a brake disc.

[0111] Second liner 36 includes a base 38 and a liner 40. Base 38 and liner 40 are similar or identical to base 18 and liner 20, respectively, described above. Therefore, for the sake of brevity, they will not be described in detail below. It should be noted that second liner 36 includes a suction region 48, which includes a suction port 50 formed by a first cavity 52 and a recess 54, which are similar or identical to first cavity 32 and recess 34, respectively, of first liner 16. For example, suction port 50 extends generally axially.

[0112] It should also be noted that the friction surface of the second pad 36, and in particular of its lining 40, is intended to bear axially against the second surface of the brake disc, axially opposite the first surface of the brake disc, during the braking phase. As in the case of the inner pad 16, this leads to wear of the lining 40 and the brake disc, thus generating particles.

[0113] like Figure 4 and Figure 8 , the second pad 36 has a first surface 42 that abuts axially against a first surface 56 of the caliper 12. The first surface 42 of the second pad 36 is similar or identical to the outer surface 22 of the base 18 of the first pad 16. The first surface 42 of the pad 32 and the first surface 56 of the caliper 12 are advantageously made of metal.

[0114] If the caliper 12 is a floating caliper, the second pad 36 is advantageously mounted on a guide and a slide (not shown). Thus, the movement of the second pad 36 towards the brake disc is caused by the axial movement of the caliper 12, in particular its rear portion 39, relative to the caliper support 13. This axial movement of the rear portion 39 of the caliper 12 causes the second pad 36 to slide on the guide and slide on which it is mounted. Thus, the second pad 36 is directly driven by the rear portion 39 of the floating caliper 12. Moreover, in this floating caliper configuration, only one piston, here piston 14,

[0115] The first pad 16 can be driven directly and the second pad 36 can be driven indirectly by the floating caliper.

[0116] The suction port 50 of the second liner 36 may be located in the first surface 42 of the liner 36 .

[0117] The rear portion 39 of the caliper 12 may include Figure 8 . The suction port 80 passes through the rear portion 39 of the caliper 12, between the first surface 56 and the exterior of the caliper 12. For example, the suction port 80 extends generally axially.

[0118] When the surface 42 of the liner 36 contacts the surface 56 of the caliper 12, the suction port 50 of the liner 36 and the suction port of the caliper 12 are advantageously aligned. Specifically, the suction port 80 of the caliper 12 is adapted to seal against the second liner 36 opposite the suction port 50. Because the first surface 42 of the liner 32 and the first surface 56 of the caliper 12 are made of metal, the seal between the second liner 32 and the caliper 12 is provided by metal-to-metal contact. Due to this seal between the liner 32 and the caliper 12, particles generated by wear of the liner 32 and the brake disc during the braking phase can be extracted by the suction device, as will be described in detail below, thereby limiting the amount of particles released into the environment.

[0119] The suction port 80 of the caliper 12 may be adapted to bear in a sealed manner against the suction port 50 of the second pad 36 during braking, during which particles are generated by wear. Between braking phases, the pad 36 is pushed towards the rear portion 39, which also makes it possible to maintain the seal between the second pad 32 and the caliper 12. This makes it possible to extract residual particles during the cleaning phase.

[0120] like Figure 8 As shown, the diameter D1 of the suction port 50 of the second pad 36 can be smaller than the diameter D2 of the suction port 80 of the caliper 12. This ensures that a maximum amount of particles emitted during engagement of the second pad 36 with the brake disc are sucked in by the suction device. In practice, if the suction port 80 of the caliper 12 were the same diameter as or smaller than the suction port 50 of the second pad 36, the risk of particles accumulating at the interface between the two suction ports 50, 80 would be very high.

[0121] In order to connect the suction openings 50, 80 to the suction means, the device 10 comprises a second suction pipe 90. The second pipe 90 can be made continuously with the floating casting 13B.

[0122] The second conduit 90 has a first end 92 and a second end 93 .

[0123] A first end 92 of the conduit 90 is secured directly or indirectly to the caliper 12. In the figure, the first end 92 is directly connected to the suction port 80 of the caliper 12. This allows the conduit 90 to be indirectly connected to the suction area 48 of the second pad 36. Thus, particles generated by wear of the pad 36 and the brake disc can move from the suction area 48 of the pad 36 through the port 80 in the caliper to the conduit 90.

[0124] In particular, the first end 92 is at least partially a close fit or tight fit in the port 80. Thus, the seal between the caliper 12 and the suction pipe 90 is improved, which limits the risk of particles being discharged outside the device 10 at the interface between the caliper 12 and the second suction pipe 90.

[0125] In the non-limiting example shown in the figures, the suction port 80 includes a shoulder 82 in its end 81 opposite the second pad 36. Due to the shoulder 82, the diameter D2 of the suction port 80 of the caliper 12 is increased in its end 81 relative to the rest of the port 80.

[0126] The shoulder 82 is, for example, substantially annular. The shoulder 82 is advantageously shaped to accommodate the second suction pipe 90, in particular its first end 92. The end 92 of the pipe 90 can be specifically tightly fitted or tightly fitted in the end 81 of the port 80.

[0127] Since the diameter of the suction opening 80 of the caliper 12 is increased from its first end 81 by the shoulder 82, the second suction pipe 90 can be housed in the suction opening 80 of the caliper, ensuring that the diameter of the passage 94 for the flow of particles in the suction pipe is equal to or greater than the diameter of the suction opening 80 of the caliper. This limits the risk of particles accumulating at the interface between the suction opening 80 of the caliper 12 and the second suction pipe 90.

[0128] Securing the suction tube 90 to the caliper 12 prevents the second suction tube 90 from exerting a force on the second pad 36 .

[0129] The second end 93 of the conduit 90 is intended to be connected to a suction device. As mentioned above, such a device may be a suction and filtration device. Note that the first conduit 60 and the second conduit 90 may be connected to the same suction and filtration device or separate suction and filtration devices.

[0130] The second suction pipe 90 is preferably entirely composed of one or more rigid parts. In other words, the pipe 90 preferably does not have a flexible part similar to the flexible part 66 of the pipe 60.

[0131] like Figure 3 As is clear from the figure, the shape of the pipe 90 may include an elbow 95. This elbow 95 enables the end 93 of the pipe 90 to be placed on the same side of the caliper 12 as the end 63 of the pipe 60. Thus, it is simpler to connect the two pipes 60, 90 to the same suction and filtering device.

[0132] like Figure 8 It can also be seen that the second suction pipe 90 can also be fixed to the caliper 12 by at least one detachable connecting member 96. Thus, in the event of wear, the pipe 90 can be easily replaced. The detachable connecting member 96 is, for example, a screw.

[0133] Next describe Figure 9 A variation of the device 10 is shown in FIG. In this figure, the device 10 is Figures 1 to 8 The same or similar elements in the examples are denoted by the same reference numerals. Therefore, for the sake of brevity, they are not described below, and the description of these elements above is applicable to this variant.

[0134] Here, the caliper 12 is a fixed caliper. Compared to the floating caliper described above, a fixed caliper differs in that the second pad 36 is axially moved by a piston 104, which is similar to or identical to the piston 14 that drives the first pad 16. Furthermore, the second pad 36 is not axially moved by movement of the caliper 12 relative to the caliper bracket 13.

[0135] Furthermore, in order to track the movement of the piston 104, Figure 9The fixed clamp in FIG. 1 may include a conduit 110 that is similar or identical to the conduit 60 described above. That is, the conduit 110 may include at least one rigid portion and at least one flexible portion that are similar or identical to the rigid portions 64 - 1 , 64 - 2 and the flexible portion 66 of the conduit 60 .

[0136] Finally, the pipe 110 is installed in a similar or identical manner to the pipe 60 and will not be described further below. Suffice it to say that the pipe 110 can be connected directly or indirectly to the piston 104 or the gasket 36 in a manner similar to the pipe 60. One end 112 of the pipe 110 is adapted to sealably abut against the gasket 36, opposite the suction port 50.

[0137] It should be noted that, as in the case of a floating caliper, in the case of a fixed caliper, the pads 16, 36, after rubbing against the brake disc, will move away from the brake disc due to a slight bounce (not shown) of the brake disc. Specifically, when the brake disc rotates, the pads 16, 36 move away from the brake disc.

[0138] In the case of the floating caliper shown in the figures, the pads 16, 36 move away from the brake disc when the piston 14 is retracted (thereby moving away from the inboard pad 16) and the caliper 12 moves relative to the caliper carrier 13 away from the outboard pad 36. The pads 16, 36 are released, which allows them to move in a direction away from the brake disc under the effect of slight runout of the brake disc.

[0139] In the case of a fixed caliper, the pistons 14, 104 associated with the inner and outer pads 16, 36 are retracted to move away from the corresponding pads. Therefore, the pads 16, 36 can move in a direction away from the brake disc under the effect of a slight runout of the brake disc.

[0140] The present invention is not limited to the embodiments described above, which are merely exemplary, but encompasses all variations that may be conceived by a person skilled in the art within the scope of the claimed invention. For example, as shown in the figures, each pipe 60, 90, 110 may include a branch 120. Such branches 120 are preferably not provided in a device 10 intended for installation in a vehicle or a stationary machine including a rotor. These branches 120 are only useful when the device 10 is used for experimental testing to measure the reduced pressure in the pipe carrying them.

Claims

1. A friction brake device (10), comprising a caliper (12), at least one lining (16) and at least one piston (14), wherein the at least one lining (16) is movable in translation relative to the caliper (12) along an axis (A), the lining (16) being intended to cooperate with a brake disc, the at least one piston (14) being movably mounted on the caliper (12) and capable of axially translating the lining (16), the lining (16) comprising at least one particle intake region (28), the particle intake region (28) comprising a suction port (30), characterized in that The device (10) further comprises a suction pipe (60) fixed to the piston (14), the suction pipe (60) comprising an end portion (62) adapted to rest in a sealing manner against the gasket (16), the end portion being opposite the suction opening (30) of the gasket (16) so as to connect the suction pipe (60) and the suction zone (28) of the gasket (16).

2. The device (10) according to the preceding claim, characterized in that The end (62) of the suction pipe (60) is rigidly connected to a bracket (74) which is fixed to the piston (14).

3. The device (10) according to the preceding claim, characterized in that The bracket (74) includes a port (76) facing the corresponding end (62) of the pipe (60), and the bracket (74) is adapted to bear against the gasket (16) in a sealing manner so that the suction port (30) in the gasket (16) and the port in the bracket are opposite each other.

4. The device (10) according to any of the preceding claims, characterized in that The suction pipe (60) comprises at least one rigid portion (64, 64-1, 64-2) fixed to the piston (14), and a flexible portion (66) adapted to allow the piston (14) to move axially.

5. Device (10) according to the preceding claim, characterized in that The flexible portion (66) includes at least one bellows (70).

6. The device (10) according to any of the preceding claims, characterized in that The caliper (12) is a floating caliper capable of axial translation relative to the caliper support (13), the device (10) comprising a so-called first inner pad (16) and a so-called second outer pad (36), the first pad (16) being directly driven by the piston (14) and the second pad being directly driven by the rear part (39) of the floating caliper, a first suction pipe (60) being connectable to the suction area (28) of the first pad (16) and a second suction pipe (90) being connectable to the suction area (48) of the second pad (36).

7. Device (10) according to the preceding claim, characterized in that The rear portion (39) of the floating caliper comprises a suction port (80), to which a second suction pipe (90) is connected, and the suction port (80) of the floating caliper (12) is capable of resting against the second pad (36) in a sealing manner, opposite to the suction area (48) of the second pad (36), so as to connect the second suction pipe (90) and the suction area (48) of the second pad (36).

8. The device (10) according to any one of claims 1 to 5, characterized in that The caliper (12) is a so-called fixed caliper, the device comprising a so-called first inner pad (16) on the vehicle side and a second outer pad (36) on the rim side, each pad (16, 36) being directly driven by at least one piston (104), a first suction pipe (60) being connectable to the suction area (28) of the first pad (16), and a second suction pipe (110) being connectable to the suction area (48) of the second pad (36).

9. The device (10) according to claim 8, characterized in that Each suction pipe (60, 110) is fixed to a corresponding piston (14, 104), and each suction pipe (60, 110) includes an end portion (112) adapted to rest in a sealing manner against the corresponding gasket (16, 36), the end portion being opposite to the suction port (30, 50) of the corresponding gasket (16, 36) so as to connect the suction pipe (60, 110) and the suction zone (28, 48) of the corresponding gasket (16, 36).

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