DE102020108533A1 - Disc brake assembly with identification system - Google Patents

Abstract

Disc brake assembly for a vehicle or a machine, the assembly comprising a caliper support (1), a caliper (2), a disc (3), linings (11, 12), the assembly further comprising: - a disc identification (6) which is arranged on the disc and / or a pad identification (7) which is arranged on at least one of the first and second pads, - a reading device (4, 5) which is designed to read one or more of the identifications, wherein the disc and / or pad identifications are electronic identifications.

Description

Technical field and context

The present invention relates to brake assemblies, particularly of the disc brake type, which are primarily intended for use on road or rail vehicles. The present invention is also applicable to stationary machines such as industrial machines.

A rotor disk and brake pads are used in these disc brake assemblies, each pad including a sole and a friction pad.

More particularly, the invention relates to low-pollutant brake assemblies capable of suction-capturing particulates and dust generated from abrasion and expelled from friction brakes. It is known that these particles dispersed in the environment are harmful to human health.

State of the art

Systems or devices for trapping particles and dust resulting from the abrasion of friction brakes have been proposed, particularly in the patent FR3076877 on behalf of the present applicant.

The solutions known thus prove to be entirely satisfactory, but the braking performance and the size of the particle collection rate depend on the one hand on the material that forms the friction block of the linings and on the other hand on the material of the disc surface.

It is therefore necessary to maintain the optimal performance of the braking system over the long term, i.e. with increasing wear of the components, which abrade and wear, and also in the event of a replacement of a worn component (s) (lining and / or disc), whereby the component has to be replaced by a component of the same type and of adequate material.

Summary of the invention

• - eine Scheibenidentifizierung, die auf der Scheibe angeordnet ist, und/oder mindestens eine Belagsidentifizierung, die auf mindestens einem des ersten und zweiten Belags angeordnet ist,
• - eine Lesevorrichtung, die ausgestaltet ist, eine oder mehrere der Identifizierungen zu lesen,

wobei die Scheiben- und/oder Belagsidentifizierungen elektronische Identifizierungen sind.To this end, according to the present disclosure, a disc brake assembly for a vehicle or a machine is proposed, the assembly comprising a saddle carrier, a saddle, a disc, a first pad and a second pad, the assembly being characterized in that it further includes:

• a disc identification which is arranged on the disc and / or at least one covering identification which is arranged on at least one of the first and second covering,
• - a reading device which is designed to read one or more of the identifications,

wherein the disc and / or pad identifications are electronic identifications.

As a result, said pad and / or disk identifications make it possible to identify the type of component (pad and / or disk) perfectly. Since the reading device is embedded on the brake assembly, the identifications are advantageously read in situ, thus ensuring the adequacy of the components effectively mounted on the brake assembly, and thus compliance with the braking performance and the low level of particle contamination (this goes out the ejection rate of the particles and optionally from the collection rate of the particles). If the braking system is subject to a regulation, the unambiguous identification of the components of the system, as they are mounted on the vehicle (or the machine), enables conformity with the regulation to be ensured.

Thanks to these arrangements, it can be provided that, if one of the attached components is not compliant, an alarm message can be issued to a user of the vehicle (or the machine) through their read but unexpected identification or through their unread identification, or even a limitation of vehicle performance can be applied.

According to one aspect it can be provided that the reading device comprises a logic unit and a reading element. In the case of a vehicle, the reading element is arranged in the vicinity of the disc and the pads, while the logic unit can be arranged in a more distant position, in the passenger compartment or engine compartment, protected from environmental influences.

According to one aspect it can be provided that the reading element is arranged on the saddle carrier. As a result, the position in relation to the disc is fixed and known, while the saddle is generally floating, its position changing with the wear of the pads. In addition, the reading element is not endangered by mechanical impacts when the covering is changed.

According to one aspect it can be provided that the reading element is arranged on the saddle. This leaves them for the The necessary cables for the identification function run parallel to the hydraulic hose or to the cable of the wear indicator of the linings, which are generally already connected at the level of the saddle.

According to one aspect, the reading element can comprise an antenna which is designed to transmit and receive signals which are exchanged in the direction or from the direction of the pane identification and / or the covering identification. As a result, the antenna of the reader remotely supplies the identifications and, conversely, receives data back. The reading organ is thus limited to rustic and robust electronics, or is even free of electronics. The reading organ can be placed in a physico-chemical and mechanical environment which is quite aggressive.

According to one aspect, the target identification ( 6th ) and / or the covering identification ( 7th ) be an electronic tag of the RFID chip / tag type, i.e. an electronic identification component that communicates thanks to electromagnetic waves, the tag being supplied remotely by the reader and being free of its own electric battery. Advantageously, these labels have become very cheap; In addition, these electronic labels are very tolerant of environmental influences and, in particular, of wide temperature ranges.

According to one aspect, the target identification ( 6th ) and / or the covering identification ( 7th ) be arranged on an insulating substrate, the thickness of which is at least equal to 1 mm, this substrate being attached to the disc and / or the covering by gluing. This frees oneself from the electromagnetic shielding effect that is generated by the metal masses of the disks and coverings, or at least this shielding effect is reduced.

According to one aspect, the covering identification ( 7th ) can be arranged on the sole of the covering. As a result, the identification works continuously with increasing wear of the pads. Whether the covering is new or more or less worn does not prevent the identification from being read. The pad identification can be placed on an edge of the sole.

According to one aspect, the covering identification ( 7th ) in the block ( 14th ) can be embedded or attached to the block. As a result, since the electromagnetic waves can penetrate the friction material of the pad, the reading performance can prove to be satisfactory. In addition, the identification works continuously up to a certain level of wear and tear; Beyond a predetermined wear level, the lining identification can be destroyed and in this case one can use this configuration in order to use the electronic lining identification as a wear indicator.

According to one aspect, the target identification is ( 6th ) placed on the face of the disc facing inwards, that is to say on the face opposite the face intended to receive the rim, in a zone lying radially inside the ring over which the pads pass. This protects the affected area from potential mechanical effects and this position is compatible with the presence of surrounding parts (hub, wheel rim, ...).

According to one aspect, the assembly can further comprise a system for collecting brake particles by suction. Thanks to the presence of such a suction system, combined with a system for the precise identification of the relevant parts, as proposed, a very low level of particle pollution can be ensured (this comes from the rate of ejection of the particles in connection with the relevant parts and from a good particle collection rate).

The invention is also directed to a vehicle comprising one or more disc brake assemblies as previously described. In a motor vehicle in particular, there are typically four disc brake assemblies, one on each wheel.

• - 1 eine perspektivische Ansicht einer Scheibenbremsenbaugruppe gemäß einer Ausführungsform der Erfindung,
• - 2 einen Querschnitt einer Scheibenbremsenbaugruppe aus 1, jedoch mit Ausführungsabwandlungen,
• - 3 ein Funktionsdiagramm des Identifikationssystems,
• - 4 eine auseinandergezogene Ansicht der Scheibenbremsenbaugruppe aus 1.

Further aspects, objects and advantages of the invention will emerge from a reading of the following description of an embodiment of the invention, which is given as a non-restrictive example. The invention can also be better understood in light of the accompanying drawings. Show it:

• - 1 a perspective view of a disc brake assembly according to an embodiment of the invention,
• - 2 Figure 3 shows a cross section of a disc brake assembly 1 , but with design modifications,
• - 3 a functional diagram of the identification system,
• - 4th Figure 3 is an exploded view of the disc brake assembly 1 .

Detailed description of embodiments

In the different figures, the same reference symbols designate identical or similar elements.

the 1 and 2 show a brake assembly 10 according to a first embodiment of the invention, which relates to an embodiment of a disc brake. Such a configuration of a disc brake is very common in motor vehicles, utility vehicles, trucks, buses and in rail vehicles and also on two-wheelers. In this embodiment, the braking effect takes place on a rotor called a “disc”, which is firmly connected to the rim of the wheel, but is different from it.

Since it is a friction brake, it is based on a rotor that rotates around a wheel axis A, on which a brake stone acts by friction to reduce its speed by converting kinetic energy into heat. The rotor is a special disc 3 dedicated to the braking function.

The disc is firmly connected to the wheel to be braked (or the wheels of the axle to be braked) and is a brake block, generally a brake pad 11 called, is intended to press on the disc in the axial direction A in order to brake it. The pad is in relation to a caliper 2 movably attached. The brake assembly 10 includes a saddle support 1 on which the saddle 2 is appropriate.

In the classic configuration shown, there are actually two coverings 11 , 12th that can be claimed to each other to make the disc 3 under the action of a piston 8th interlayer, thus generating a force parallel to the axial direction of the wheel A.

Any topping 11 , 12th includes a metal base 15th , also called "sole", and a support body 14th , also called “block”, which comprises friction material that is able to release particles resulting from friction-induced abrasion.

In the example shown, with a single piston 8th , the saddle 2 on the saddle rack 1 thanks to a floating assembly, that is, it can slide along axis A, to compensate for the progressive reduction in the thickness of the blocks with increasing wear of the linings. Two piston designs that act symmetrically are also contemplated.

In one example, the disc may have a substantially constant thickness, preferably at least in its peripheral zone which includes that zone which is subject to wear.

According to the present invention it is provided via a disc identification 6th to have, which is arranged on the disc. Identification is to be understood here as an electronic identification, also called an electronic label. Such an electronic label is an electronic identification component that communicates thanks to electromagnetic waves, with the label being supplied remotely by a reader antenna. Such an electronic label does not have its own electrical battery. In one embodiment (see 1 ) is the target identification 6th on a shoulder of the disc, on an outside EXT.

In another embodiment (see 2 ) is the target identification 6th placed on the face of the disc facing inwards, that is to say on the face opposite the face intended to receive the wheel rim, in a zone lying radially inside the ring over which the linings swipe. As in 2 it should be noted that the affected area is protected from potential mechanical effects and that this position is compatible with the presence of surrounding parts (hub, wheel rim, ...).

In one embodiment of a road vehicle, as in 1 and 2 As shown, the direction marked by EXT denotes a direction directed towards the wheel rim that will be mounted on the disc, or in other words, the direction EXT denotes a direction directed towards the exterior of the vehicle. The direction marked by INT denotes a direction which is directed toward the vehicle interior, the non-rotating parts of the wheel assembly are arranged on the side of the direction INT. As is known per se, the disc is screwed onto the wheel hub and the rim is screwed onto the wheel hub through the disc.

It is advantageously provided via a covering identification 7th to have that on at least one of the first and second surfacing 11 , 12th is arranged. It can be provided that there is an identification on each of the pads of a pad pair, i.e. a pair 7th , 7 ' of identifications. The covering identification is preferably also an electronic label, that is to say an electronic identification component which communicates thanks to electromagnetic waves, the label being supplied remotely by a reading antenna. The electronic identification is free of its own electric battery. The pad identification 7th can be placed on the sole of the surface. The pad identification 7th can be placed on one edge of the sole. In this way, identification remains continuously possible with increasing wear of the linings. Whether the lining is new or more or less worn does not prevent the identification from being read correctly.

In a modification, not shown, it can be provided that the pad identification is embedded in the block or attached to the block, at a predetermined depth in relation to the sole, and that it is destroyed from a predetermined wear depth of the pad, so that it is itself as a wear indicator of the Covering is used. In other words, the pad can be identified when it is new or slightly worn, and beyond a certain level of wear and tear, if the identification has been physically destroyed, the identification no longer works and the system can conclude from this that the pad needs to be changed .

If the disc identification and the lining identification are preferably of the same type, they can be read by one and the same reading device.

Optionally, the target identification 6th (or the pad identification (s) 7th ) be arranged on a local insulating substrate, the thickness of which is at least equal to 1 mm, this substrate being attached to the disc and / or the covering by adhesive bonding. In other words, the local insulating substrate forms a spacer to keep the label away from the plane of an unfavorable mass of metal. This frees oneself from the electromagnetic shielding effect that is generated by the metal masses of the disks and coverings, or at least this shielding effect is reduced. It should be noted that the thickness of the insulating substrate can be between 0.5 mm and 2 mm.

Given that the disc identification 6th and the pad identification (s) 7th To be read “in situ”, a reading device is provided which is designed to read these identifications without contact or necessarily direct vision. The reading device comprises a logic unit 4th and a reading organ 5 .

The logic unit 4th is a special electronic unit or a function that is integrated in an electronic multifunction computer in the vehicle. The logic unit is preferably located 4th in the passenger compartment or the engine compartment of the vehicle, protected from environmental influences.

The reading organ 5 is located near the pads and the disc to allow reading of the identifications of these parts when they are in use position on the brake assembly 10 are located. The reading organ 5 acts as an antenna for bidirectional communication (providing electrical energy in the execution and receiving a code in the reverse direction).

In one embodiment, the reading element is on the saddle 2 arranged. As in 4th shown, forms the marked reading organ 5 ' a loop located on the inner surface of the saddle, i.e. the surface opposite the pads. In this embodiment one leaves the cable or cables necessary for the identification function 44 parallel to the hydraulic hose 84 or run to the cable of the wear indicator of the pads that are connected at the level of the saddle (see 2 ).

In another embodiment, the reading element is on the saddle support 1 arranged. In this case the position with respect to the disc is fixed and known, while the saddle is generally floating, its position changing with the wear of the pads. In addition, in this refinement, the reading element is not endangered by mechanical impacts when the lining is changed.

As in 4th shown, includes the saddle support 1 an arched outer bracket, marked 19th , an inner bracket 17th , which is arranged on the inside INT, and two crossbeams that span the pane, that is, a front crossbeam 18th and a rear cross member 16 .

According to a possibility that is included in 1 is shown is the reading organ 5 on the outside bracket 19th of the saddle carrier 1 arranged

According to another possibility that is included in 4th is shown, a first reading organ 50 that is on the inside bracket 17th of the saddle carrier 1 is arranged, and a second reading member 52 that is on the outside bracket 19th is arranged to be provided.

In another modification, which is not shown in the figures, a reading element can be provided which forms a large loop which runs over the entire saddle support, ie along the inner bracket 17th , then the front cross member 18th , then the outer bracket 19th and finally along the rear cross member 16 runs.

In one embodiment, the reading element comprises an antenna which is designed to transmit and receive signals which are exchanged in the direction or from the direction of the pane identification and / or the covering identification. The antenna of the reading organ remotely supplies the identifications and, conversely, receives data back. The reading organ is limited in this embodiment 5 thus on a rustic and robust electronics, or is even free of electronics. The reading member can be placed in a physico-chemical and mechanical environment which is quite aggressive, such as a brake assembly.

Furthermore, the brake assembly can comprise a system for collecting brake particles by suction. In such a system, a vacuum source, which in 3 with the reference number 91 is symbolized, pneumatic lines which connect the vacuum source with one or more grooves that are set up in the block of the pads, so that the pads are sucked in as close as possible to the place of production. Such a system is described in more detail in the publication WO2018065541 from the present applicant.

Thanks to the presence of such a suction system, combined with a system for the precise identification of the relevant parts, as proposed, a very low level of particle pollution can be ensured (this comes from the rate of ejection of the particles in connection with the relevant parts and from a good particle collection rate).

Optionally, it can be provided that if the parts are not correctly identified, e.g. B. lack of identification or unexpected identification, the system for managing the emission of brake particles information on the one hand to an on-board instrument of the multifunction display type 43 transmits to report the non-compliant situation to the driver or the owner of the vehicle (alarm message). In this case of non-conformity, it can also be provided that one or more services of the vehicle are limited, the logic unit 4th can send information ad hoc to the engine control computer, for example 42 of the vehicle in order to implement one or more power limitations, or even a ban on use.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• FR 3076877 [0004]
• WO 2018065541 [0047]

Claims (12)

Disc brake assembly (10) for a vehicle or a machine, the assembly comprising a caliper support (1), a caliper (2), a disc (3), a first pad (11) and a second pad (12), the The assembly is characterized in that it further comprises: a disc identification (6) which is arranged on the disc, and / or at least one lining identification (7) which is arranged on at least one of the first and second lining, - a reading device ( 4, 5) which is configured to read one or more of the identifications, the disc and / or lining identifications being electronic identifications. Assembly according to Claim 1 , wherein the reading device comprises a logic unit (4) and a reading element (5; 5 ';50; 52). Assembly according to Claim 2 , wherein the reading member is arranged on the saddle support (1). Assembly according to Claim 2 , wherein the reading member is arranged on the saddle (2). Assembly according to Claim 2 wherein the reading element comprises an antenna which is designed to transmit and receive signals which are exchanged in the direction or from the direction of the disc identification (6) and / or covering identification (7, 7 '). Assembly according to one of the Claims 1 until 4th wherein the disc identification (6) and / or the covering identification (7) is an electronic label of the RFID tag type, which is supplied remotely by the reading element and without its own electric battery. Assembly according to Claim 2 wherein the disk identification (6) and / or the covering identification (7) are arranged on an insulating substrate, the thickness of which is at least equal to 1 mm, this substrate being attached to the disk and / or the covering by adhesive bonding. Assembly according to one of the Claims 1 until 7th , wherein the covering identification (7) is arranged on the sole (15) of the covering. Assembly according to one of the Claims 1 until 8th , wherein the pad identification (7) is embedded in the block (14) or attached to the block. Assembly according to one of the Claims 1 until 9 wherein the disc identification (6) is arranged on the inwardly facing surface of the disc, in a zone which lies radially inward of the ring which is swept by the coatings. Assembly according to one of the Claims 1 until 9 , further comprising a system for collecting brake particles by suction. A vehicle comprising a disc brake assembly according to any preceding claim.

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