• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a disc brake system (1) comprising a caliper (2) provided with two brake linings, a brake disc (1) cooperating with the caliper (2), each brake lining rubbing against the one of two faces opposite one another of the disc (1) in braking operation, metallic or electrostatic particles coming from an abrasion of the linings and of the disc (1) being emitted during the braking operation. The stirrup (2) is coated at least partially with a layer of a magnetic material attracting and collecting the metallic or electrostatic particles emitted. Figure of the abstract: FIGURE 1
    公开号:FR3090057A1
    申请号:FR1873063
    申请日:2018-12-17
    公开日:2020-06-19
    发明作者:Eric Palpacuer
    申请人:PSA Automobiles SA；
    IPC主号:
    专利说明:

    Description
    Title of the invention: Disc braking system comprising a caliper coated with a magnetic layer
    Technical field of the invention
    The present invention relates to a disc braking system comprising a caliper coated with a magnetic layer and a set of wheels equipped with such a braking system for each of its wheels and a method of using a magnetic material deposited on a brake caliper for such a braking system or such a set of wheels.
    Such a braking system may be present in a motor vehicle but this is not limiting.
    Prior art
    In a braking system of the prior art, the caliper is provided inside with two brake linings and cooperates with a braking disc.
    Each brake lining present in the caliper rubs against one of two opposite faces of the disc in braking operation.
    The stirrup can be fixed or floating. In the context of a fixed caliper, the caliper does not move relative to the disc and the brake linings are each pushed against the disc by means of one or more hydraulic pistons.
    In the context of a floating caliper, only one of the linings is pushed against the brake disc by one or more hydraulic pistons. Once this lining is in contact with the disc, the pressure that continues to exert on the piston (s) will then move the caliper body which is slidably mounted in a caliper yoke until the second lining, worn through the caliper body, in turn comes into contact with the disc.
    [0007] During a braking operation, metallic or electrostatic particles from abrasion of the linings and the disc are emitted. There may also be organic particles that are not electrostatically charged.
    These particles, frequently microparticles, are harmful to the organism generating various serious conditions, such as irritation of the respiratory tract, cardiovascular diseases, etc., and must be recovered.
    Document EP-A1-2 309 146 describes a collection of particles and brake dust by a magnetic plate housed at the bottom of a particle collection chamber. A magnetic field is created inside the chamber, which magnetic field attracts particles and brake dust. A collection tank is provided which opens onto the base of the particle collection chamber and collects the particles, being able to be removed from the chamber.
    Such a device for collecting particles and dust takes up space in a relatively constrained environment and hardly suitable for its installation. Such a device is not also placed as close as possible to the brake linings and the disc, given the presence of the entire braking system and is therefore only ineffective.
    Therefore, the problem underlying the invention is in a disc and caliper braking system carrying brake linings rubbing on the disc during the braking operation, to recover as efficiently as possible the particles emitted during abrasion of the brake linings and the disc without requiring a bulky device.
    Summary of the invention
    To this end the present invention relates to a disc braking system comprising a caliper provided with two brake linings, a brake disc cooperating with the caliper, each brake lining rubbing against one of two opposite faces l to each other of the disc in braking operation, metallic or electrostatic particles coming from an abrasion of the linings and of the disc being emitted during the braking operation, characterized in that the caliper is coated at least partially a layer of a magnetic material attracting and collecting the metallic or electrostatic particles emitted.
    The particles collected can be metallic particles but also non-metallic particles electrostatically charged, non-metallic particles which can be electrostatically charged when the brake linings rub on the disc.
    The device for recovering metallic or electrostatic particles according to the present invention in the form of a layer of magnetic material coating the caliper is placed as close as possible to the brake linings and the disc.
    First, it follows that the magnetic material used can simply create a reduced magnetic field to be effective when, according to the closest prior art, the magnetic field created had to be strong, given the distance of the magnetic plate from the brake linings and the disc.
    Second, the layer of magnetic material is applied to the stirrup and therefore has an extremely small footprint, of the order of one or a few millimeters unlike the nearest prior art device which has a footprint several centimeters.
    Thirdly, a single layer of magnetic material applied to the stirrup is less expensive than a whole recovery device according to the closest prior art comprising a collection chamber, a plate of relatively thick magnetic material and a detachable tank provided with removable fixing means with the collection chamber.
    Fourth, by being carried by the stirrup, advantageously both outside and inside the stirrup, the magnetic layer is as close as possible to the creation of particles and therefore can pick them up very effectively.
    Fifth, when recovering the particles magnetically bonded to the layer of the stirrup, it is not necessary to dismantle a tank as proposed by the state of the art. This recovery can be done by suction, blowing or brushing which are simpler operations than the dismantling of an inaccessible tank which can also overturn during this recovery and having to be replaced again after emptying.
    Advantageously, the stirrup is coated by painting with the magnetic material.
    This represents a relatively simple and quick way to position the layer of magnetic material on the caliper. The layer thickness may be greater at locations in the caliper known to be more exposed to particles.
    Advantageously, the stirrup is coated by adhesion with a layer in one piece of the magnetic material, the layer being already formed before adhesion. The layer can then be designed to be a little thicker than a layer of paint, resulting in a stronger electromagnetic field.
    Advantageously, the magnetic material is deposited on an entire caliper.
    Advantageously, the layer of magnetic material comprises one or more surface-active elements or has a soft and sticky consistency for the capture and retention of uncharged electrostatically emitted organic particles.
    This completes the collection of particles by collecting organic particles not electrostatically charged, which is less common than the collection of metal particles or non-metallic particles electrostatically charged.
    The invention also relates to a wheel set equipped with a braking system for each wheel of the train, the caliper being carried in a fixed or pivoting manner by a wheel pivot and the disc being integral with a wheel in comprising a hub zone, characterized in that the braking system is as previously mentioned, the hub zone and the wheel pivot also being coated with a layer of magnetic material attracting and collecting the particles emitted during the operation braking.
    The present invention also relates to a method of using a magnetic material deposited on a stirrup for a collection on this magnetic material of metallic or electrostatic particles from an abrasion of the linings and a disc during a braking operation of such a braking system or for such a train of wheels, characterized in that the particles collected by the magnetic material are recovered during a maintenance phase of the braking system by being separated from the magnetic material.
    The layer of magnetic material has the capacity to retain the particles for a predetermined period or for an estimated predetermined amount of retained particles, maintenance may be provided at the end of this period or at the end of a mileage which should lead according to estimates at a quantity of particles retained greater than the predetermined quantity. Other means of evaluation, such as the number of brakes applied, can also be taken into account.
    Advantageously, the particles are separated from the magnetic material by brushing, blowing or vacuuming and treated.
    This separation does not require any disassembly and is relatively simple to perform. Aspiration seems to be the most effective means of recovering particles, but this is not limiting.
    In a first embodiment of the method, the magnetic material is based on at least one powder of demagnetized ferrites, said at least one powder being mixed with a binder for at least partial application to the stirrup, the ferrites being magnetized after application to the stirrup.
    This avoids a possible demagnetization of the powder or powders during their coating on the caliper.
    In a second embodiment of the method, the magnetic material is based on at least one powder of magnetized ferrites, said at least one powder being mixed with a binder for at least partial application on the stirrup.
    The main advantages of the present invention are a reduction or even elimination of the rejection of particles emitted by abrasion during braking, protection of public health, a very low cost of the means of capturing the emitted particles and a very small footprint of this capture means in the form of a layer of magnetic material on a stirrup.
    The appearance of the wheel associated with the braking system is further protected by preventing dirt on the styling face of the wheel which faces outwards and therefore visible in the environment of a motor vehicle.
    Brief description of the figures
    Other characteristics, objects and advantages of the present invention will appear on reading the detailed description which follows and with regard to the appended drawings given by way of nonlimiting examples and in which:
    [Fig.l]
    - Figure 1 is a schematic representation of a perspective view of a braking system with disc, caliper and brake linings which can be in accordance with the present invention when the caliper is coated with a layer of magnetic material collecting the particles emitted during abrasion of the disc and the brake linings during braking,
    [Fig.2]
    - Figure 2 is a schematic representation of a perspective view of two brake linings for use in a braking system according to the present invention but having no characteristics specific to the invention.
    It should be borne in mind that the figures are given by way of examples and are not limitative of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily at the scale of practical applications. In particular, the dimensions of the various elements illustrated are not representative of reality.
    Detailed description of the invention
    In what follows, reference is made to all the figures taken in combination. When reference is made to a specific figure, this figure is to be taken in combination with the other figure for the recognition of designated numerical references.
    Referring to Figures 1 and 2, the present invention relates to a disc braking system 1 comprising a caliper 2 provided with two brake linings 3. A brake disc 1 cooperates with the caliper 2, each lining brake 3 rubbing against one of two opposite faces of the disc 1 in braking operation.
    Conventionally, without this being essential in the context of the present invention, the bracket 2 can be connected to a wheel pivot 4, this in a fixed or mobile manner. The caliper 2 has a partially hollow shape and houses the brake linings 3 inside. The stirrup 2 also receives inside of it a portion of a wheel disc 1 secured to the wheel by a wheel hub.
    A stirrup 2 may include a stirrup holder 6 spaced apart and articulated to the rest of the stirrup 2 and bearing partially on the disc 1. The stirrup holder 6 has two fixing pins 7 relative to the rest of the stirrup 2 by forming guide pins.
    As particularly visible in Figure 2, the brake linings 3 or brake pads, provided at each of their longitudinal ends with a fixing tip 3a, are in the form of elongated blocks arranged parallel and at a distance l 'from each other by presenting relatively flat friction surfaces against the disc 1, not shown in this figure 2.
    The brake linings 3 are movably mounted in the caliper 2 and are operated by pistons to put them under pressure on the brake disc 1 when the pistons are actuated.
    The pistons are generally mounted with seals which deform elastically when the pistons are maneuvered in the direction of tightening of the linings 3 against the brake disc 1 so that the seals recall the pistons in the separated position from the brake disc 1 when the braking action is interrupted.
    This creates abrasion of the brake linings 3 and also of the disc 1 and metallic or electrostatic particles from abrasion of the linings and of the disc 1 are emitted during the braking operation.
    The present invention provides that the stirrup 2 is coated at least partially with a layer of a magnetic material attracting and collecting the metallic or electrostatic particles emitted.
    According to the present invention, the brake caliper 2 is painted or is covered with a layer of magnetic material. This layer of magnetic material is not referenced in the figures because it is at least partially confused with the stirrup 2 that this layer of magnetic material covers.
    This layer of magnetic material makes it possible to magnetically attract and capture most of the dust and particles produced during braking, essentially metallic particles or electrostatically charged particles.
    Indeed, the particles, most often microparticles emitted by the linings 3 and the disc 1, are mainly composed of metallic and organic elements charged electrostatically.
    The magnetic layer applied at least locally to the caliper 2, advantageously at least on the areas closest to the path of the emitted particles, is located near the brake linings 3 and captures a maximum of particles.
    In a first embodiment of the magnetic layer, the stirrup 2 can be coated by painting with the magnetic material, this at least partially.
    The layer of magnetic material may be thicker at places in the caliper 2, the vicinity of which is particularly exposed to the projection of particles emitted during braking.
    In a second embodiment of the magnetic layer, the stirrup 2 can be coated by adhesion with a layer in one piece of the magnetic material, the layer being already formed before adhesion. This avoids painting the stirrup 2, the layer already made being continuously deposited on the stirrup 2. The layer can be glued on the stirrup 2.
    The magnetic material can be deposited on a whole of the stirrup 2, in particular the internal part of the stirrup 2 than on the external part as shown in FIG. 1.
    So that the particle collection relates to all the particles emitted, not only the metallic particles or electrostatically charged particles, the layer of magnetic material can comprise one or more surface-active elements or has a soft and sticky consistency for capture and retention of uncharged electrostatically emitted organic particles.
    This can be done by partially coating said organic particles not electrostatically charged on the surface of the layer of magnetic material. These characteristics relating to organic particles which are not electrostatically charged are purely optional and are not essential for the implementation of the present invention.
    The invention also relates to a train of wheels equipped with a braking system for each of the wheels of the train, the caliper 2 being carried in a fixed or pivoting manner by a wheel pivot 4 and the disc 1 being integral with a wheel comprising a hub zone 5, not shown in FIG. 1 but referenced by its passage recess made in the disc 1.
    The braking system for this train of wheels is as previously described. The hub area 5 and the wheel pivot 4 can also be coated with a layer of magnetic material attracting and collecting the particles emitted during the braking operation.
    Indeed, other elements arranged near the braking system can benefit from the coating with a layer of magnetic material, this to capture as much as possible of particles emitted during abrasion of the brake linings 3 and of the disc. 1 during braking.
    It is necessary to discharge the layer of magnetic material regularly from the retained particles.
    This is done in a method of using a magnetic material deposited on a brake caliper 2 for harvesting on this magnetic material of metallic or electrostatic particles from an abrasion of the linings and a disc 1 during of a braking operation of such a braking system or for such a train of wheels.
    The particles collected by the magnetic material are recovered during a maintenance phase of the braking system by being separated from the magnetic material.
    For a motor vehicle equipped with a braking system or a set of wheels as previously described, the skilled person has the skills to know the maximum amount of particles that can be retained by the magnetic material.
    Those skilled in the art also have the skills to estimate the number of kilometers traveled, the duration of the journey or the number of brakes performed and with what braking intensity, these parameters, which can be measured in particular by a control unit engine, used to monitor the quantity of particles emitted and to compare it with the maximum quantity of particles emitted.
    This can be done in different ways. The particles can be separated from the magnetic material by brushing, blowing or vacuuming. Then, these particles can be treated to be eliminated or recycled.
    In a first optional embodiment of the deposition of the magnetic material on the stirrup 2 in the context of the aforementioned method of use, the magnetic material can be based on at least one powder of demagnetized ferrites.
    Or the powders can be mixed with a binder for at least partial application on the caliper 2, the ferrites being magnetized after application on the caliper 2, which avoids possible demagnetization during their application.
    In a second optional embodiment of the deposition of the magnetic material on the stirrup 2 in the context of the aforementioned method of use, the magnetic material can be based on at least one powder of magnetized ferrites.
    Or the powders can be mixed with a binder for at least partial application on the caliper 2. This avoids the magnetization step of the first embodiment.
    The present invention can also be extrapolated to other elements of a braking system than a caliper 2 and could also be implemented in a drum braking system, the drum being coated with a layer of magnetic material.
    The invention is in no way limited to the embodiments described and illustrated which have been given only by way of examples.
    权利要求:
    Claims (1)
    [1" id="c-fr-0001]
    Claims [Claim 1] Disc brake system (1) comprising a caliper (2) provided with two brake linings (3), a brake disc (1) cooperating with the caliper (2), each brake lining (3) rubbing against the 'one of two faces opposite to each other of the disc (1) in braking operation, metallic or electrostatic particles coming from an abrasion of the linings (3) and the disc (1) being emitted during the braking operation, characterized in that the caliper (2) is coated at least partially with a layer of a magnetic material attracting and collecting the metallic or electrostatic particles emitted. [Claim 2] Braking system according to claim 1, in which the caliper (2) is coated with paint of the magnetic material. [Claim 3] Braking system according to claim 1, in which the caliper (2) is coated by adhesion with a layer in one piece of magnetic material, the layer being already formed before adhesion. [Claim 4] Braking system according to any one of the preceding claims, in which the magnetic material is deposited on an entire caliper (2). [Claim 5] Braking system according to any one of the preceding claims, in which the layer of magnetic material comprises one or more surface-active elements or has a soft and sticky consistency for the capture and retention of uncharged electrostatically emitted organic particles. [Claim 6] Train wheels fitted with a braking system for each of the train wheels, the caliper (2) being fixedly or pivotally carried by a wheel pivot (4) and the disc (1) being integral with a wheel comprising a hub area (5), characterized in that the braking system is according to any one of the preceding claims, the hub area (5) and the wheel pivot (4) also being coated with a layer magnetic material attracting and collecting the particles emitted during the braking operation. [Claim 7] Method of using a magnetic material deposited on a brake caliper (2) for a collection on this magnetic material of metallic or electrostatic particles originating from an abrasion of the brake linings (3) and of a disc (1) during a braking operation of a braking system according to any one of claims 1 to 5 or for a wheel set according to the preceding claim, characterized in that
    the particles collected by the magnetic material are recovered during a braking system maintenance phase by being separated from the magnetic material. [Claim 8] Method according to the preceding claim, in which the particles are separated from the magnetic material by brushing, blowing or vacuuming and treated. [Claim 9] Method according to either of Claims 7 and 8, in which the magnetic material is based on at least one powder of demagnetized ferrites, said at least one powder being mixed with a binder for at least partial application on the stirrup (2), the ferrites being magnetized after application to the stirrup (2). [Claim 10] Method according to either of Claims 7 and 8, in which the magnetic material is based on at least one powder of magnetized ferrites, said at least one powder being mixed with a binder for at least partial application to the stirrup (2).
    1/1
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3090057B1|2020-12-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1981002690A1|1980-03-18|1981-10-01|Partcoll Handelsbolag|An improvement in brakes or clutches|
    WO2011014819A2|2009-07-31|2011-02-03|Tech M3, Inc.|Reduction of particulate emissions from vehicle braking systems|
    EP2309146A1|2009-09-18|2011-04-13|Fabrizio Lupica|Disk brake pad|CN111942158A|2020-07-09|2020-11-17|浙江吉智新能源汽车科技有限公司|Braking energy recovery device, system, vehicle and energy recovery method|
    US11187288B2|2019-07-31|2021-11-30|Federal-Mogul Motorparts Llc|Vehicle brake component for collecting brake dust|
    法律状态:
    2019-11-20| PLFP| Fee payment|Year of fee payment: 2 |
    2020-06-19| PLSC| Publication of the preliminary search report|Effective date: 20200619 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 3 |
    2021-11-17| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1873063A|FR3090057B1|2018-12-17|2018-12-17|Disc brake system comprising a caliper coated with a magnetic layer|FR1873063A| FR3090057B1|2018-12-17|2018-12-17|Disc brake system comprising a caliper coated with a magnetic layer|
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