• 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 present invention relates to a disc brake device for capturing particles emitted by abrasion of the friction pad during friction thereof against the disc. This device consists in particular of a particle extraction channel and a retention pipe of said particles. The extraction channel passes through the friction pad and part of the brake caliper before opening into the retention tubing. The retention pipe, provided at its output with a dust filter, generates by simple dimensional variation of its section a vacuum that sucks the brake particles contained in the extraction channel. The device according to the invention is particularly intended to limit the pollution emitted by the brakes of road or rail vehicles.
    公开号:FR3034831A1
    申请号:FR1500767
    申请日:2015-04-10
    公开日:2016-10-14
    发明作者:Romuald Jean Jacques Vigier
    申请人:Romuald Jean Jacques Vigier；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the field of road or rail vehicle brakes. More specifically, the invention relates in particular to a disk brake system capable of capturing and trapping particles resulting from abrasion of friction pads commonly called "brake pads". Several environmental and health studies have shown, on the one hand, that these particles are an important part of air pollution from motor vehicles and, on the other hand, they are extremely harmful to health. It has already been proposed devices for capturing these polluting particles but these devices have several disadvantages: - some, by implementing a housing around the brake caliper (see, for example, the patent FR 2815099), penalize the 15 times the cooling of the brake system and the unsprung mass of the wheel. - Others, consisting of mechanisms using moving parts (see, for example, the patent FR 2 997 743), are likely to be afflicted, over time, many malfunctions, the brake dust being of nature to seize the mechanisms they encounter. - All, by their relative complexity, prove to be penalizing for the cost of the disc brake. The object of the present invention is to capture these pollutant particles at a lower cost and without causing problems of mass, cooling or reliability while being visually discrete. The device according to the invention is essentially an air circulation system: A stream of fresh air circulating in a manifold creates a vacuum which draws the particles of brake dust directly into the friction pad, via a dedicated duct. . To leave the tubing, the flow passes through a filter that traps the particles. The whole thing works through basic aerodynamic principles without resorting to any moving mechanism, moving part or external source of depression whatsoever. Other features and advantages of the invention will appear on reading the description which is given below, by way of indicative and in no way limiting with reference to the accompanying drawings, in which: FIG. 1 is a sectional view of FIG. a conventional disc brake system.
    [0002] Figure 2 is a sectional view of the same brake system showing the flow of air flow generated by the conjunction of the advancement of the vehicle and the ventilation effect caused by the rotation of the rim. Figure 3 is a sectional view of the friction pad according to the invention. Figure 4 is a bottom view of the friction pad according to the invention. Figure 5 is a perspective of the friction pad according to the invention. Figure 6 is a front sectional view of the device according to the invention. Figure 7 is a side sectional view of the device according to the invention. Fig. 8 is a block diagram illustrating the so-called Venturi effect. Figure 9 is a sectional view of the retention tubing duo in a version made with a polymer insert. Figure 10 is a sectional view of the duo retention tubing in a version integrated directly into the caliper. Figures 11 and 12 are perspectives of the friction pad according to the invention in the case where the width of the friction pad requires the breakthrough segmented into several parts. The usual disk brake system is well known to those skilled in the art. The device according to the invention conforms to it in that it comprises a wheel consisting of at least one rim (1), a disc (2) integral with said wheel, a stirrup (3) overlapping this disc and provided with at least one piston (4) and friction pads (5), commonly called "pads" for braking the disc 35 when the piston plates against the disc. 3034831 3 These pads consist of a metal support plate (7) to which is attached a sole (6) made of a friction material. This sole undergoes abrasion during each braking and, as a result, disperses particles of the friction material in the atmosphere. These particles, torn off by the passage of the disc, are "pushed" by it to the extreme edge, called "trailing edge" (28), of the friction pad from which they escape.
    [0003] The device according to the invention is distinguished from the usual disk brake systems in that it comprises: - a particle extraction channel, - a retention pipe (12), - a particle collecting filter (15) .
    [0004] The device according to the invention is a two-input circuit that does not use any moving mechanism or moving part or external source of depression. The first input of the circuit is constituted by a breakthrough (9) made within the friction pad (5), directly in the mass without adding any additional piece whatsoever, and which passes right through both the sole (6) of friction material and its support plate (7). This breakthrough (9), which in its lower part "captures" the particles resulting from the abrasion of the pad, opens, in its upper part, on a pipe (10) arranged in the stirrup (2) [directly in the case the pad located on the side opposite the piston, via a connecting piece (30) in the case of the pad located on the piston side]. This duct (10) opens in turn via a nozzle (11) into the retention pipe (12).
    [0005] The continuity "breakthrough-conduit-nozzle" constitutes the extraction channel. The second inlet of the circuit, called the "air inlet" (13), is at one end of the retention pipe (12).
    [0006] The other end of the tubing, called "air exhaust mouth" (14), closed by a filter (15) permeable to air but impervious to particles, is the only output of the circuit.
    [0007] 3034831 4 The intake mouth (13) is oriented, obliquely, towards the front and towards the inside of the vehicle while the exhaust mouth (14) is oriented towards the outside of the vehicle so that the tubing Retention (12) is naturally supplied with fresh air by the dynamic flow (24) generated by the concomitant actions of the vehicle advance and the ventilation caused by the rotation of the rim (1). In addition, the section of the retention pipe (12) varies along its length so as to create a depression (16) at the nozzle 10 (11) of the extraction channel. Bernoulli's theorem makes it possible to understand the phenomenon that generates this depression: if the kinetic energy of a fluid in motion increases then this increase is translated by an equivalent decrease of its elastic energy.
    [0008] The device according to the invention exploits one of the most known applications of this theorem, called a Venturi effect: by reducing the section of a pipe (here the retention pipe), the flow of the fluid flowing through it is accelerated. (increase in kinetic energy) which generates a depression (decrease in elastic energy). During braking, the shoe (5) is pressed by the action of the piston (4) against the disc (2) while the piercing (9) communicates with the conduit (10), so that the extraction channel is only open in its final part, constituted by the nozzle (11).
    [0009] Thus, the depression (16) created in the retention tubing (12) sucks the contents of the extraction channel. It should be noted that the content of the extraction channel, whose initially high temperature could damage the filter, is then cooled by its meeting with a flow of fresh air (24).
    [0010] Next, the air stream (24), now loaded with polluting particles, continues its path to the exhaust mouth (14) of the retention pipe (12). When the flow (24) passes through the filter (15), the latter traps the particles.
    [0011] Certain features of the device according to the invention make it possible to optimize the efficiency of its operation: the piercing (9), oriented parallel to the trailing edge (28) of the friction pad (5) and whose length (25) is slightly less than the width (27) of said pad, has a width of between 1 millimeter and 1 centimeter. It traverses the entire thickness (18) of the friction pad (5).
    [0012] This breakthrough is located as close as possible to the trailing edge (28) so that most of the friction surface is before the breakthrough (9). This breakthrough is made directly in the friction material during molding of the latter as well as in the support plate (7) during the cutting thereof, without the addition of additional parts. So that the portion (32) of the sole (6) which is located after the breakthrough (9) does not tear off the support plate (7) under the action of the friction force, said portion (32) is 15 is cut away from the trailing edge (28) so that its upper part has a large adhesion surface (34) with the support plate (7) while its lower part has a small surface area friction (35) with the disk (2) when the friction pad is new. Then, the increase of said friction surface (35) under the effect of wear has no consequences on the tearing off of this portion (32) of the sole: indeed, the thickness (8) of said sole (6) decreases simultaneously and proportionally, or it is this thickness which determines the force exerted at the point of adhesion of the sole (6) on the support plate (7). For certain types of vehicles (heavy and / or heavy vehicles), the friction pad (5) has large dimensions. In this case, the piercing (9) can be separated into several segments (their number depends on the width of the friction pad) so that bridges (22a and 22b) provide the mechanical cohesion of the support plate (7) and than that of the sole (6). In order to limit swirling phenomena which may adversely affect the efficiency of the Venturi effect, fins (20) can be positioned in the tubing (12) between the inlet (13) and the throttle (17). ), to guide the flow (24) and maintain it in a laminar state.
    [0013] The throttle (17) is followed by a flare that leads to the filter (15). Over this flaring air flow (24) slows which generates a rise in pressure.
    [0014] The conjunction of this rise in pressure and the presence of the obstacle (albeit relative relative because porous) constituted by the filter (15) is likely to cause a "return effect" of the flow (24) towards the depression zone ( 16). In order to counteract this eventual reflux, hollow "V" -shaped fins (21) arranged in the flare opposing impervious bearing surfaces to the flow, which can therefore only be evacuated by passing through through the filter (15), which, on the contrary, presents only permeable surfaces. The device can be constituted either by a single pipe (12) which sucks the contents of the bores of the two friction pads (5a and 5b) located on either side of the same disk (2), or by two tubings (12a and 12b) each assigned to one of these two pads. In this second case, the two pipes meet in a single duct after their respective depression zones (16a and 16b), at the level of the filter (15), so that the device requires only a single filter (15). ) for the two friction pads (5a and 5b) of the same disc (2). In a particular embodiment of the device according to the invention, the tubing is, for example, totally integrated into the stirrup and comes directly from the foundry. It is this particular embodiment which is illustrated in FIG. 6. In another industrial embodiment of the device according to the invention, the tubing results from the combination of molded or machined shapes in the mass of the stirrup. with an insert on said stirrup for example pressed steel sheet. It is this particular embodiment which is illustrated in FIG. 10. In another industrial embodiment of the device according to the invention, the tubing is entirely made in a part manufactured independently of the stirrup, for example by injection molding. of high thermal resistance polymer, then reported on said stirrup.
    [0015] It is this third embodiment which is illustrated in FIG. 9. The device according to the invention can be applied to any road or rail vehicle disc brake in order to limit the amount of harmful particles emitted in the vehicle. atmosphere by said brake.
    权利要求:
    Claims (10)
    [0001]
    CLAIMS1) A non-polluting disc brake device for motor vehicles comprising a disc (2), a stirrup (3) overlapping the disc and provided with at least one piston (4), and friction pads (5) of which abrasion releases particles during each braking and a retention device of said particles characterized in that it comprises: - at least one particle extraction channel through the entire thickness (18) of the friction pad (5) and a portion of the stirrup (3) and opening into a tubing (12) for retention, - a tube (12) for retention of particles provided at its output with a filter (15) dust, said tubing (12) ) of retention is supplied with fresh air by a conjunction of the advance of the vehicle and a ventilation effect caused by the rotation of the rim (1) of the vehicle and creates within it a depression (16) by the only variation dimension of a section of said retention pipe (12).
    [0002]
    2) Device according to claim 1, characterized in that the particle extraction channel is composed of the following three segments: - a breakthrough (9) for capturing particles, traversing the entire thickness (18) of the friction pad ( 5), support plate (7) included, such that when the friction pad (5) is pressed against the disc (2), the piercing (9) opens only in its upper part, thus communicating with an intermediate duct (10), - the intermediate duct (10) passing through the stirrup (3) from the pierce (9) to a nozzle (11), - the nozzle (11) opening into the tubing (12) retaining a precise location where a depression (16) is created in said retention tubing (12) such that said depression (16) sucks the particles contained in said particle extraction channel.
    [0003]
    3) Device according to the preceding claim, characterized in that the bore (9) having a depth equal to the total thickness 3034831 9 (18) of the friction pad (5), a length (25) slightly less than the width ( 27) of said friction pad (5), a width of between 1 millimeter and 1 cm, and positioned as close as possible to a trailing edge (28) of said friction pad (5), 5 is made directly from a material of friction during the molding of said friction material as well as in the support plate (7) during the cutting of said support plate (7).
    [0004]
    4) Device according to claim 3, characterized in that a portion (32) of friction plate posterior to the extraction aperture (9), is bevelled (19) so that: - the surface of adhesion (34) between said sole portion (32) and the support plate (7) is greater than the friction surface (35) of said sole portion; the reduction of the thickness of the friction plate under the effect of the wear is as fast or faster as the simultaneous increase of the friction surface between the sole portion (32) and the disc ( 2).
    [0005]
    5) Device according to claim 4, characterized in that, when the width of the friction pad (5) is greater than or equal to 4 cm, the piercing (9) is segmented in the direction of its length 25 to create bridges (22a and 22b) which connect the rear sole portion (32) of the friction shoe (5) to a main body (31) of said friction shoe (5).
    [0006]
    6) Device according to claim 1, characterized in that the tubing (12) of retention is provided with an air inlet (13), oriented obliquely both towards the front of the vehicle and towards the inside of the wheel well, and an air exhaust mouth (14) facing the outside of the wheel well, so that a dynamic air flow (24) generated by a conjunction of the vehicle advance and a ventilation effect caused by the rotation of the rim (1), travels the tubing (12) from the intake port (13) to the exhaust port (14). ). 3034831 10
    [0007]
    7) Device according to claim 6, characterized in that the section of the tubing (12) varies so as to create, in a portion of said section immediately preceding the nozzle (11), a progressive throttling which causes an increase in the kinetic energy of the dynamic air flow (24), and which thus causes an equivalent decrease in the elastic energy of said dynamic air flow (24) so that a depression (16) is generated at the output of this progressive throttling and precisely at the level of the nozzle (11) of the particle extraction channel, so as to suck the particles contained in said extraction channel.
    [0008]
    8) Device according to claim 7, characterized in that hollow fins (21), in the form of "V" open towards the filter 15 (15), are arranged between the depression zone (16) and the filter (15) so as to allow the flow of dynamic air (24) to flow while opposing an air reflux in the opposite direction, from the zone preceding said filter (15) to the depression zone (16) . 20
    [0009]
    9) Device according to claim 1, characterized in that a tubular (12a) assigned to a friction pad (5a) located on one side of the disc (2) and a tubular (12b) assigned to a friction pad (5b) located on the other side of said disk (2), merge into a single pipe at the filter (15) after respective depression zones (16a and 16b) of said pipes (12a and 12b), so that the device requires only one filter (15) for the two friction pads (5a and 5b) of the same disk (2). 30
    [0010]
    10) Device according to any one of the preceding claims, characterized in that the tubing (12) of particle retention is molded, in part or in full, directly in the brake caliper (2) or is a part performed independently , for example by polymer injection, then reported on said brake caliper (2).
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3034831B1|2018-04-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19643869A1|1996-10-30|1998-05-07|Wolfgang Foesel|Brake system for motor vehicle or machine|
    DE19846887A1|1998-10-13|2000-04-20|Wolfgang Foesel|Brake unit for vehicle, with each brake shoe or brake lining having dust channels in form of grooves and dust collector|
    FR2815099A1|2000-10-10|2002-04-12|Peugeot Citroen Automobiles Sa|Disk brake for motor vehicle has closed casing fitted over frictional areas which carries pipe at top which has air inlet connected upstream and filter downstream|
    DE202006016661U1|2006-10-27|2008-03-06|Mann+Hummel Gmbh|Filter arrangement for brake dust retention systems|
    GB2515063A|2012-03-02|2014-12-17|Trevor Michael Mennie|Brake system|FR3072144A1|2017-10-11|2019-04-12|Psa Automobiles Sa|VEHICLE BRAKE SYSTEM WITH AIR DEFLECTOR AND VEHICLE USING THE SAME|
    FR3076876A1|2018-01-17|2019-07-19|Tallano Technologie|BRAKE PAD FOR DISC BRAKE ASSEMBLY COMPRISING A FRONT ZONE SUCTION GROOVE AND A FRONT AREA CHANFREIN|
    FR3076877A1|2018-01-17|2019-07-19|Tallano Technologie|DISC BRAKE PAD COMPRISING A COLLECTION GROOVE EXTENDING IN BIAIS|
    WO2019215402A1|2018-05-09|2019-11-14|Tallano Technologie|Friction assembly for a disc brake system able to filter a gaseous phase resulting from the friction of a lining|
    US20200049213A1|2016-10-05|2020-02-13|Tallano Technologie|Brake pad and braking unit for capturing particles|
    法律状态:
    2016-04-07| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-14| PLSC| Search report ready|Effective date: 20161014 |
    2017-05-02| PLFP| Fee payment|Year of fee payment: 3 |
    2018-04-03| PLFP| Fee payment|Year of fee payment: 4 |
    2020-01-10| ST| Notification of lapse|Effective date: 20191206 |
    2020-02-21| RN| Application for restoration|Effective date: 20200114 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 6 |
    2020-05-23| PLFP| Fee payment|Year of fee payment: 7 |
    2020-06-05| FC| Favourable decision of inpi director general on an application for restauration.|Effective date: 20200428 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1500767|2015-04-10|
    FR1500767A|FR3034831B1|2015-04-10|2015-04-10|ANTI-POLLUTION DEVICE FOR DISC BRAKE|FR1500767A| FR3034831B1|2015-04-10|2015-04-10|ANTI-POLLUTION DEVICE FOR DISC BRAKE|
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