• 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:
    Device for recovering particles emitted by a vehicle wheel braking system, comprising linings (6) with friction materials (28) having a friction front face in contact with a rotating element (2), and cavities ( 44) each equipped with a magnet (40) for recovering particles, the linings (6) comprising holes (50) opening out towards the rear on these cavities (44), each magnet (40) comprising plates having faces flat receiving particles, which are arranged in the direction perpendicular to the friction face.
    公开号:FR3086023A1
    申请号:FR1858346
    申请日:2018-09-17
    公开日:2020-03-20
    发明作者:Eric Palpacuer
    申请人:PSA Automobiles SA；
    IPC主号:
    专利说明:

    “DEVICE FOR RECOVERING PARTICLES FROM THE BRAKING OF A MOTOR VEHICLE EQUIPPED WITH MAGNETS” [0001] The present invention relates to a device for recovering particles for a braking system of a motor vehicle, as well as a braking system and a vehicle. automobile equipped with such particle recovery devices.
    Motor vehicles include braking systems comprising linings fitted with friction materials delivering pressure on discs or drums linked in rotation to the wheels of the vehicle, in order to apply braking torque thereto.
    Braking of the vehicle results in abrasion wear of the friction materials, as well as reduced wear of the metal discs or drums, which generate particles dispersed in the ambient air causing pollution of this air. The anti-pollution standards will impose in the future limitations on the emission of polluting particles from braking.
    A known device for recovering particles emitted by disc brakes, presented in particular by documents EP-A1-2309146 and JP-A-2018003940, uses holes made on the brake linings, passing through these linings to drive the particles emitted between the friction material and a face of the disc to a rear cavity containing a magnet.
    The particles of friction materials containing metallic elements, and the metallic particles of the discs, are attracted by the magnet placed flat at the bottom of the cavity, parallel to the lining, in order to accumulate in this cavity forming a tank to avoid dispersion in the air. During a vehicle maintenance, the tank is removed to empty the particles.
    However, the magnet disposed flat at the bottom of the tank, gradually covering with particles, is located relatively far from the front face of the lining bearing on the disc and emitting the particles, which makes its attraction weaker for attract these particles through the holes in the linings and then to the bottom of the tank.
    In addition, the rear face of the magnet being in support at the bottom of the tank, only its front face is used for the collection of particles which reduces its attraction force.
    A certain number of particles can disperse around the linings and get lost in the air, the efficiency of the recovery device is low.
    The present invention aims in particular to avoid these drawbacks of the prior art.
    To this end, it offers a device for recovering particles emitted by a vehicle wheel braking system, comprising linings with friction materials having a friction front face in contact with a rotating element, and cavities equipped each of a magnet for recovering particles, the linings comprising holes opening towards the rear on these cavities, this device being remarkable in that each magnet comprises plates having flat faces receiving the particles, which are arranged in the direction perpendicular to the friction face.
    An advantage of this particle recovery device is that the flat faces of the magnet arranged in the perpendicular direction, can extend into the tank along its entire perpendicular direction, which gives magnetized surfaces near the entry of this reservoir, applying a high attraction force just behind the holes in the gasket. In addition, the two faces of the flat magnets can be used, which substantially doubles the magnetized surface accessible to particles, compared to a magnet fixed flat to the bottom of this reservoir having a single magnetized face.
    The particle recovery device according to the invention may further include one or more of the following characteristics, which can be combined with one another.
    Advantageously, each magnet has a cross shape in a direction parallel to the friction face.
    In addition, advantageously the cylindrical cavities have axial grooves receiving the ends of the crosses forming the magnets.
    Advantageously, each magnet extends over the entire depth of the cavity.
    In particular, the linings may have a flat friction face coming from a brake disc.
    Advantageously, the friction material of each lining has grooves for particle circulation.
    In this case, in particular the grooves may include a central part surrounding a central bore of the lining, and loops opening on both sides on this central part.
    The invention also relates to a braking system comprising a brake disc, a brake caliper and two sets of clamping of this brake disc, comprising a recovery device comprising any of the preceding characteristics, equipped a particle recovery cavity arranged on the rear face of each lining.
    In this case, advantageously a cavity is produced inside a hydraulic brake piston.
    The invention further relates to a motor vehicle equipped with a braking system comprising linings, which comprises particle recovery devices comprising any of the preceding characteristics.
    The invention will be better understood, and other objects, characteristics, details and advantages thereof will appear more clearly in the explanatory description which follows, made with reference to the accompanying drawings given solely by way of example illustrating an embodiment of the invention, and in which:
    - Figure 1 is an exploded view of a disc brake comprising a recovery device according to the invention;
    - Figure 2 is an axial sectional view of this disc brake, passing through the axis of the piston of the brake caliper;
    - Figures 3a and 3b are views respectively of the piston and the piston magnet of this braking system;
    - Figures 4a and 4b are views respectively of the reservoir and the reservoir magnet of this braking system; and
    - Figures 5 and 6 are cross-sectional views of this brake, presented respectively along the cutting planes V-V and VI-VI.
    Figures 1 and 2 show a brake caliper 4 receiving a brake disc 2, pressing on each face 16 of this disc a brake lining 6 equipped with a friction material 28, comprising an internal lining 10 disposed on the internal axial side, indicated by arrow INT, and an external seal 12.
    The brake disc 2 comprises a hub 14 receiving fixing bores on the hub carrier of the suspension, and two parallel transverse braking faces 16, having between them radial holes 18 allowing internal ventilation of the disc.
    The brake caliper 4 comprises a body 20 produced by a molding, comprising on the inner side an axial bore forming a cylindrical chamber 22, receiving a piston 24 actuated by hydraulic pressure, having a front surface forming a crown 26 pressing on the rear face of the internal lining 10. An annular seal 42 surrounds the piston 24 to seal the chamber 22.
    The body 20 comprises opposite the piston 24, a fork 30 comprising two fingers releasing a circular central space 32 aligned with the piston 24, receiving on the inner side the support from the rear face of the external lining 12.
    The body 20 constitutes a clamp clamping by its linings 6 the faces 16 of the brake disc 2, which is connected by an axial slide to the hub carrier in order to be positioned axially freely according to the wear of the linings.
    The piston 24 comprises a cylindrical cavity 44 having towards the outside an opening coming from the rear face of the internal lining 10, forming an integrated reservoir receiving a bonding magnet 40 of the emitted particles.
    An additional cylindrical tank 34 adjusted in the circular central space 32 of the fork 30, is surrounded by a transverse outer flange 36 bearing on the outer face of the body of the stirrup 20, comprising two holes receiving screws fixing 38 on this body. The additional reservoir 34 has a cylindrical cavity having an opening towards the inside coming from the rear face of the external lining 12, also forming a reservoir receiving a bonding magnet 40.
    Figures 3a and 4a respectively show the piston 24 and the additional reservoir 34, having an identical interior cavity 44 receiving the same bonding magnet 40. Each interior cavity 44 has four regularly distributed axial grooves, extending over the entire length of this cavity.
    Figures 3b and 4b show the magnet 40 formed by two perpendicular planes elongated in the axial direction, forming a cross section in cross comprising four identical branches. Each end of the branches of a magnet 40 fits in an axial groove of the interior cavities 44, so as to maintain this magnet in all directions, inside the piston 24 or the additional reservoir 34.
    The two internal 10 and external 12 linings are symmetrical with respect to the brake disc 2. FIG. 5 shows the internal lining 10 comprising a central bore 50 aligned on the axis of the piston 24, perpendicular to the friction face, having a diameter substantially equal to the radius of the interior cavity 44 of this piston.
    A groove made over the entire thickness of the friction material 28 has a central portion 56 constituting a significant clearance around the central bore 50, of substantially rectangular shape, having in the tangential direction a width equal to the diameter of this bore. central, and in the radial direction a length covering more than three-quarters of this material.
    Each long side of the central part 56 has a loop 52 comprising a tangential direction, then a radial direction and finally the reverse tangential direction in order to connect the two angles of this central part.
    The loops 52 constitute a drainage going around each lining 6, which allows the particles emitted 54 over the entire friction face to move in these loops to reach the central part 56. The particles 54 are then attracted by the magnet 40 coming to bear under the rear face of the lining 6, as close as possible to this rear face, and pass through the central bore 50 to come and lodge in the internal cavity 44 separated into four spaces.
    This gives a very short circuit between the friction faces emitting the particles 54, and the magnet 40 located just behind each lining.
    Figure 6 shows the large area given by the cross forming the magnet 40, which receives the particles 54 on both sides of its four branches. This gives both a maximum surface of the magnets 40 capable of receiving the particles, representing approximately 95% of the total surface of these magnets, and good proximity of the magnets relative to the friction faces.
    During the maintenance of the vehicle, we take advantage of the changes of the linings 6 to empty the cavities 44 of its particles 54, in order to leave for the recovery of the particles from these new linings.
    Alternatively, a particle recovery device according to the invention may be used on a drum brake, by installing cavities on the rear face of the brake shoes, on the side opposite to the friction material.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Device for recovering particles (54) emitted by a vehicle wheel braking system, comprising linings (6) with friction materials (28) having a front friction face in contact with a rotating element (2) , and cavities (44) each equipped with a magnet (40) for recovering particles (54), the linings (6) comprising holes (50) opening out towards the rear on these cavities (44), characterized in that that each magnet (40) comprises plates having flat faces receiving the particles (54), which are arranged in the direction perpendicular to the friction face.
    [2" id="c-fr-0002]
    2. Recovery device according to claim 1, characterized in that each magnet (40) has in a direction parallel to the friction face a cross shape.
    [3" id="c-fr-0003]
    3. Recovery device according to claim 2, characterized in that the cylindrical cavities (44) have axial grooves receiving the ends of the crosses forming the magnets (40).
    [4" id="c-fr-0004]
    4. Recovery device according to any one of the preceding claims, characterized in that each magnet (40) extends over the entire depth of the cavity (44).
    [5" id="c-fr-0005]
    5. Recovery device according to any one of the preceding claims, characterized in that the linings (6) have a flat friction face coming from a brake disc (2).
    [6" id="c-fr-0006]
    6. Recovery device according to claim 5, characterized in that the friction material (28) of each lining (6) has grooves for particle circulation (54).
    [7" id="c-fr-0007]
    7. Recovery device according to claim 6, characterized in that the grooves comprise a central part (56) surrounding a central bore (50) of the lining (6), and loops (52) opening on both sides on this part central (56).
    [8" id="c-fr-0008]
    8. Braking system comprising a brake disc (2), a brake caliper (4) and two linings (6) for clamping this brake disc (2), characterized in that it comprises a recovery device according to any one of the preceding claims, equipped with a cavity (44) for recovering the particles (54) arranged on the rear face of each lining (6).
    [9" id="c-fr-0009]
    9. Braking system according to claim 8, characterized in that a cavity (44) is produced inside a piston (24) for hydraulic brake application.
    5
    [0010]
    10. Motor vehicle equipped with a braking system comprising linings, characterized in that it comprises particles recovery devices (54) according to any one of claims 1 to 7.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3086023B1|2020-09-04|
    WO2020058596A1|2020-03-26|
    EP3853492A1|2021-07-28|
    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|
    EP1256739A2|2001-05-09|2002-11-13|Ford Global Technologies, Inc.|A brake dust collection assembly|
    DE102005006465A1|2005-02-12|2006-08-24|Bayerische Motoren Werke Ag|Vehicle with friction brake with brake covering and having an electrostatic field and/or magnetic field in its vicinity that is generated around the wheel housing|
    EP2309146A1|2009-09-18|2011-04-13|Fabrizio Lupica|Disk brake pad|
    US20140262633A1|2013-03-15|2014-09-18|Alex E. Kunzler|Braking device, system and method|
    US20180031059A1|2016-07-29|2018-02-01|Joseph Gelb|Brake Pad Waste Collector|
    DE102017007429A1|2017-08-05|2018-04-19|Daimler Ag|Device for collecting magnetic brake abrasion particles of a disc brake system|FR3110652A1|2020-05-25|2021-11-26|Psa Automobiles Sa|VEHICLE BRAKING SYSTEM|
    FR3110943A1|2020-05-26|2021-12-03|Psa Automobiles Sa|BRAKE PARTICLE COLLECTION DEVICE|JP6614049B2|2016-06-30|2019-12-04|株式会社アドヴィックス|Brake pads|US11187288B2|2019-07-31|2021-11-30|Federal-Mogul Motorparts Llc|Vehicle brake component for collecting brake dust|
    法律状态:
    2019-08-20| PLFP| Fee payment|Year of fee payment: 2 |
    2020-03-20| PLSC| Search report ready|Effective date: 20200320 |
    2020-08-19| PLFP| Fee payment|Year of fee payment: 3 |
    2021-08-19| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1858346A|FR3086023B1|2018-09-17|2018-09-17|DEVICE FOR RECOVERING PARTICLES FROM THE BRAKING OF A MOTOR VEHICLE EQUIPPED WITH MAGNETS|
    FR1858346|2018-09-17|FR1858346A| FR3086023B1|2018-09-17|2018-09-17|DEVICE FOR RECOVERING PARTICLES FROM THE BRAKING OF A MOTOR VEHICLE EQUIPPED WITH MAGNETS|
    EP19783588.7A| EP3853492A1|2018-09-17|2019-09-04|Device for recovering the particles originating from the braking of a motor vehicle fitted with magnets|
    PCT/FR2019/052037| WO2020058596A1|2018-09-17|2019-09-04|Device for recovering the particles originating from the braking of a motor vehicle fitted with magnets|
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