• 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 fixed brake caliper (2, 2 ') comprising at least one pair (11) of brake pistons (114, 124) housed in two half-housings (21, 22) assembled together. According to the invention, this stirrup comprises firstly a drive mechanism including a motor (6) which rotates a screw-nut mechanism coaxial with the first piston to move it along its axis; and on the other hand a mechanical transmission mechanism distributed between the two half-housings (21, 22), arranged to cooperate with said drive mechanism to drive in rotation a second screw-nut mechanism coaxial with the second piston to produce moving this second piston an opposite direction. This transmission mechanism comprises a shaft (312, 322) parallel to the pistons, which couples two gears 311, 321 each meshing with the screw 112, 122 of one of the pistons.
    公开号:FR3046446A1
    申请号:FR1563494
    申请日:2015-12-31
    公开日:2017-07-07
    发明作者:Thierry Pasquet；Nicola Tristano
    申请人:Chassis Brakes International BV；
    IPC主号:
    专利说明:

    The invention relates to a fixed brake caliper, comprising at least one pair of brake pistons housed in two half-housings assembled together. According to the invention, this stirrup comprises on the one hand a drive mechanism including a motorization which rotates a screw-nut mechanism coaxial with the first piston to move it along its axis; and on the other hand a mechanical transmission mechanism distributed between the two half-housings, arranged to cooperate with said drive mechanism to drive in rotation a second screw-nut mechanism coaxial with the second piston to produce moving the second piston in an opposite direction .
    This transmission mechanism comprises a shaft parallel to the pistons, which couples two gears meshing each with the screw of one of the pistons.
    State of the art
    In the field of vehicle brakes, for more than fifty years, the actuation was carried out by hydraulic pistons for the service brake, and by pulling cable for the parking brake and emergency brake, or park brake. Since at least ten years, it is common to achieve an automated braking, ie motorized and at least electrical control, at least for the park brake. It has also been sought for a long time to provide fully motorized, generally electric brakes.
    However, it remains difficult to integrate this motorization in the braking base, that is to say the part that is attached to the wheel. The constraints for this are many. In particular, there is congestion, the severe environment due for example to water, heat and projections and dust, and the disadvantages of any addition of mass since it is an unsprung part.
    In disc brakes with sliding caliper, only one of the arms of the caliper carries a piston or more, generally called caliper body. The other branch has no active part, and serves only to receive the clamping force produced by the piston housed in the body. There are various solutions for mounting an electric actuator directly on or in a sliding caliper, for example as disclosed in US 4,804,073 and US 5,348,123.
    In disc brakes with fixed caliper, with one or more pairs of pistons, the two arms of the caliper each carry one piston of each pair, and the two pistons of a pair must be activated to perform the tightening. Known solutions do not currently allow to mount or integrate an electric actuator on the two pistons of such a pair of piston on a fixed bracket, usually for reasons of weight and bulk.
    An object of the invention is to overcome all or part of the disadvantages of the prior art, and in particular to achieve an actuator with electric motor mounted integral with the stirrup or integrated therein, for a stirrup disc brake fixed.
    DESCRIPTION OF THE INVENTION The invention proposes a fixed mount disc brake caliper, comprising at least one pair of opposed brake pistons comprising a first piston and a second piston, typically coaxial, housed in two half-housings assembled together, typically symmetrically. These pistons are arranged to apply and tighten at least one pair of linings on friction tracks located on the two opposite faces of a brake disc.
    According to the invention, this stirrup comprises on the one hand at least one drive mechanism including a motor or geared motor arranged to drive in rotation a first screw-nut mechanism coaxial with the first piston so as to produce a linear displacement of said first piston according to its axis in a first sense. Preferably, this drive mechanism comprises a motor mounted on the brake side of the half-train of the vehicle, that is to say the opposite side to the wheel.
    In addition, this stirrup further comprises at least one mechanical transmission mechanism distributed between the two half-housings and arranged to cooperate with said drive mechanism so as to drive in rotation a second screw-nut mechanism coaxial with the second piston so as to produce a linear displacement of said second piston along its axis in a second direction opposite to the first direction.
    Preferably, this transmission mechanism is arranged to couple between them, permanently, the screw-nut mechanisms of the first and second piston.
    This gives a motorized actuation, integrated in the braking base, which can activate the two pistons of the same pair with a single motor or even a single mechanical drive input in the caliper, which limits the weight and the space induced by this motorization.
    Making the stirrup in two parts (not similar) is usually considered a disadvantage, since it represents more manufacturing operations and assembly, and therefore cost.
    However, the invention makes it possible to use this disadvantage to implement motorized actuation more easily.
    The power source, for example in torque, is provided for example by a DC motor. The invention thus makes it possible to adapt a park brake to a fixed caliper brake, without having to install external devices and the corresponding links, mounting the assembly directly on or in the caliper.
    According to other features of the invention, advantageously combined together but not necessarily:
    The screw-nut mechanism of at least one piston, and preferably all those thus actuated, is disposed inside a housing formed in said piston on the side opposite the disk, in that it applies its force to the bottom of said housing, and is driven by an input member or input pinion which is disposed outside said housing. rev4 + support ball
    The bottom of the piston housing has a hemispherical shape which receives the support of the screw-nut mechanism by a face of complementary shape; this allows for example to facilitate and respect the alignment of the pistons of the same pair. the transmission mechanism comprises a first transmission pinion which meshes with a first pinion gear integral with the screw-nut mechanism of the first piston, and which is integral in rotation with a second pinion gear integral with the screw-nut mechanism of the second piston, via a single-axis transmission shaft extending through the two half-housings. This transmission shaft is for example made of two half-shafts coupled to each other, for example by complementary cooperation of rotational drive shape, which are free in translation relative to each other.
    Different embodiments are possible, in particular with input modes of the rotary drive from the motorization.
    According to a first exemplary embodiment, the drive mechanism comprises a worm which drives the first screw-nut mechanism by cooperation with non-parallel axes with a pinion gear.
    According to a second exemplary embodiment, the drive mechanism comprises a worm which drives the first screw-nut mechanism by cooperation with non-parallel axes with a sleeve with external teeth which surrounds the piston and is integral in rotation with its screw-nut mechanism by a coupling element disposed at the end of said piston on the side opposite the disk.
    According to a third exemplary embodiment, the drive mechanism comprises a pinion which drives the first screw-nut mechanism by cooperation with parallel axes with a pinion pinion.
    According to a fourth exemplary embodiment, which can be combined with the others, the invention applies to a stirrup (2 ') which comprises at least two pairs of pistons piston pistons parallel axes, which pistons are then coupled by the same transmission mechanism.
    In another aspect, there is also provided a vehicle or vehicle subassembly comprising at least one stirrup as described herein.
    Various embodiments of the invention are provided, integrating, according to all of their possible combinations, the various optional features set forth herein.
    List of Figures Other features and advantages of the invention will become apparent from the detailed description of a non-limiting embodiment, and the accompanying drawings in which: - FIGURE 1 is a schematic view in sagittal section by the disk axis and the axis of the pistons which illustrates a first exemplary embodiment of the invention, with worm drive on a pinion at the end of the piston; FIGURE 2 is a schematic perspective semi-transparent view illustrating the drive geared motor of the embodiment of FIGURE 1; FIG. 3 is a partial perspective diagram illustrating the arrangement of the transmission and of the two pistons, according to several drive variants, with FIG. 3a, a screw drive, FIG. 3b, a drive. by pinion with parallel axis, o in FIGURE 3c, a detail of the bearing-joint arrangement of the half-shafts of transmission, o in FIGURE 3d, a detail of the coupling of the half shafts of transmission, and o in FIGURE 3e, the shutter plug of transmission housing; FIGS. 4a and 4b illustrate a second exemplary embodiment, with worm drive on a toothed drive sleeve which surrounds the piston, respectively in partial schematic view in sagittal section and in partial view in offset cross-section. according to AA; FIGURE 5 is a schematic view in sagittal section illustrating a third embodiment with pinion drive parallel axis to the piston pin; FIGS. 6a and 6b are partial diagrams which illustrate a fourth exemplary embodiment, with a direct drive by a transmission pinion, here applied to a fixed caliper with two pairs of brake pistons, respectively in top view. in a plane parallel to the axes of the pistons and in rear view along the axes of the pistons.
    Description of an Exemplary Embodiment Embodiment 1
    FIGURE 1, FIGURE 2 and FIGURE 3 illustrate a first exemplary embodiment of the invention. The other exemplary embodiments will only be described in their differences.
    In this first embodiment, a geared motor 6 comprises a drive shaft 631 carrying a worm which meshes with a pinion 111, located at the end of the piston frame side. This pinion gear 111 rotates a screw 112, which moves a nut 113 along the Al axis of movement of the piston. This nut 113 has a hemispherical head which bears on a surface of complementary shape at the bottom of the housing formed inside the piston 114.
    As seen in FIGURE 1, the stirrup 2 is made in two parts, one of which can be fixed to the chassis of the vehicle by a fixing lug 29 provided with a bore accommodating a fixing bolt.
    Above the axis A1 of the pistons and their housings, these two half-housings 21, 22 comprise a through transmission bore, parallel to the axis of the disk 91 and that Al pistons. This transmission bore accommodates the transmission shaft here formed by two half-shafts 312, 322 which are coupled together in rotation, at the level of the separation plane between the two parts 21, 22 of the caliper, by a removable coupling 33 As illustrated in FIGURE 3d, this coupling 33 can take the form of two complementary non-circular drive shapes, carried by the end of each half-shaft. Here, it is a maneuvering plate 331 at the end of a half shaft 312, which is inserted into a slot 332 of the other half shaft 322.
    As seen in FIGURE 1, the transmission bore has an end, on the side opposite the disk 91, which forms a through-housing 401, 402, of larger diameter than the transmission pinion. Each of these housings 311, 321 is arranged to be able to introduce and accommodate the corresponding transmission gear, respectively 311 and 421.
    As illustrated in FIGURE 1 and FIGURE 3e, each of these housings is closed by a plug 411, 421 provided with a seal 413, 423, which is pressed into its housing to a stop segment 412, 422 .
    As illustrated in FIGURE 2, the drive mechanism comprises a geared motor 6 including a motor 61 driving an epicyclic reduction gear 62 to at least one epicyclic gear driven at the input by a sun gear 621 meshing with a group of satellites 622 carried by a carrier. satellites 623 and meshing with a fixed ring gear 624 integral with the geared motor gearbox, and providing an output drive by said planet carrier 633. Optionally, the geared motor can comprise several epicyclic gear trains, for example in series or harmonics with mobile intermediate ring gear, or other types of gearboxes.
    In this first embodiment, as illustrated in FIG. 3a, the geared motor 6 carries an endless screw 631 which drives the first screw-nut mechanism by cooperation with non-parallel axes with a piston pinion 111, here at an angle of 90 °.
    Embodiment 2
    In a second exemplary embodiment, as illustrated in FIGURE 4, the drive mechanism comprises a worm 631 which drives the first screw-nut mechanism by non-parallel axis cooperation with a piston sleeve 131 with external teeth 1319 which surrounds the piston 134. This sleeve is free to rotate in the housing of the piston, and is integral in rotation 1310-1399 of the screw-nut mechanism 132, 133, by a coupling element 139 disposed at the end of said piston of the opposite side to the disc 99. In this example, this connection in rotation is performed by a piston drive flange 139, integral with the screw 132, and which bears on its periphery 1399 protrusions or pins. These are housed in recesses 1310 formed in the inner surface of the drive sleeve 131.
    Embodiment 3
    In a third exemplary embodiment, as illustrated in FIGURE 3b and FIGURE 5, the drive mechanism comprises a pinion 632 which drives the first screw-nut mechanism by parallel axis cooperation with a pinion gear 111.
    Embodiment 4
    In a fourth embodiment, as shown in FIGURE 6a and FIGURE 6b, the invention is applied to a fixed caliper with two pairs of brake pistons. The drive is here presented with a gear motor shaft 632 which directly drives one of the transmission gears 311.
    Note that this training can also be applied to the other embodiments, and that this mode can also use the drive modes of the other embodiments.
    As can be seen, the same transmission shaft 312, 322 carries two transmission gears 311, 321 which each mesh with the piston pinions 111, 121 of two pairs of pistons 11a and 11b.
    Of course, the invention is not limited to the examples that have just been described and many adjustments can be made to these examples without departing from the scope of the invention.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    A fixed mount disc brake caliper (2, 2 ') comprising at least one pair (11) of opposing brake pistons (114, 124) including a first piston and a second piston, housed in two half-housings (21, 22) assembled together, which pistons are arranged to apply and clamp at least one pair of gaskets (92, 93) on friction tracks of a brake disc (91), characterized in that it comprises at least one at least one drive mechanism including a motor or geared motor (6) arranged to drive in rotation a first screw-nut mechanism coaxial with the first piston so as to produce a linear displacement of said first piston along its axis in a first direction, and at least a mechanical transmission mechanism distributed between the two half-housings (21, 22) and arranged to cooperate with said drive mechanism so as to drive in rotation a second screw-nut mechanism coaxial with the second piston so as to produce a n linear displacement of said second piston along its axis in a second direction opposite to the first direction.
    [2" id="c-fr-0002]
    2. A stirrup according to the preceding claim, characterized in that the transmission mechanism is arranged to couple between them, permanently, the screw-nut mechanisms (112-113, 122-123) of the first (114) and second ( 124) piston.
    [3" id="c-fr-0003]
    3. Caliper according to any one of the preceding claims, characterized in that the screw-nut mechanism (112-113, 122-123, 132, 133) of at least one piston (114, 124, 134) is arranged to the interior of a housing formed in said piston on the opposite side of the disc (91), in that it applies its force to the bottom of said housing, and is driven by an input member (139) or an input pinion (111, 121) which is disposed outside said housing.
    [4" id="c-fr-0004]
    4. A stirrup according to the preceding claim, characterized in that the bottom of the housing of the piston (114, 124, 134) has a hemispherical shape which receives the support of the screw-nut mechanism by a face of complementary shape.
    [5" id="c-fr-0005]
    5. Caliper according to any one of the preceding claims, characterized in that the transmission mechanism comprises a first transmission pinion (311) which meshes with a first pinion gear (111) integral with the screw-nut mechanism (112-113 ) of the first piston (114), and which is integral in rotation with a second pinion gear (121) integral with the screw-nut mechanism (122-123) of the second piston (124), via a shaft of mono-axle transmission (312, 322) extending through both half-housings (21, 22).
    [6" id="c-fr-0006]
    6. Caliper according to the preceding claim, characterized in that the or half-housings (21, 22) comprise a through bore parallel to the axis of the disc and accommodating the transmission shaft (312, 322), and the opposite end to the disk forms an opening housing (401, 402) arranged to be able to introduce and accommodate the transmission gear (311, 321), which housing is closed by a plug (411, 421) sealing (413, 423). ).
    [7" id="c-fr-0007]
    7. Caliper according to any one of the preceding claims, characterized in that the drive mechanism comprises a geared motor (6) including a motor (61) driving an epicyclic reduction gear (62) to at least one epicyclic gear driven input by a sun gear (621) meshing with a group of satellites (622) carried by a planet carrier (623) and meshing with a fixed ring gear (624) integral with the geared motor housing, and providing output drive by said planet carrier (633).
    [8" id="c-fr-0008]
    8. Caliper according to any one of the preceding claims, characterized in that the drive mechanism comprises a worm (631) which drives the first screw-nut mechanism by cooperation with non-parallel axes with a pinion gear (111 ).
    [9" id="c-fr-0009]
    9. Caliper according to any one of the preceding claims, characterized in that the drive mechanism comprises a worm (631) which drives the first screw-nut mechanism by cooperation with non-parallel axes with a sleeve (131) to external toothing (1319) which surrounds the piston (134) and is rotationally integral (1310-1399) of its screw-nut mechanism (132, 133) by a coupling element (139) disposed at the end of said piston of the opposite side to the disk (99).
    [10" id="c-fr-0010]
    10. Caliper according to any one of the preceding claims, characterized in that the drive mechanism comprises a pinion (632) which drives the first screw-nut mechanism by cooperation with parallel axes with a pinion gear (111).
    [11" id="c-fr-0011]
    11. Caliper (2 ') according to any one of the preceding claims, characterized in that it comprises at least two pairs of pistons (11a, 11b) of brake pistons (114, 124) of parallel axes (Ala, Alb), which are coupled by the same transmission mechanism (111, 311, 312, 33, 322, 321, 121).
    [12" id="c-fr-0012]
    Vehicle or vehicle subassembly comprising at least one stirrup according to any one of the preceding claims.
    类似技术:
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    WO2020136325A1|2020-07-02|Reduction motor for drum brake
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    同族专利:
    公开号 | 公开日
    DE16816608T1|2019-05-09|
    WO2017114645A1|2017-07-06|
    EP3397872A1|2018-11-07|
    EP3397872B1|2019-11-27|
    FR3046446B1|2018-01-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH01168392U|1988-05-19|1989-11-28|
    FR2837548A1|2002-03-20|2003-09-26|Daimler Chrysler Ag|Vehicle brake disc comprises floating caliper and activating device, caliper divided into two halves able to displace parallel to disc rotational axis and each carrying friction lining|
    WO2009016660A1|2007-07-30|2009-02-05|Freni Brembo S.P.A.|Electrical parking brake|
    JP2010236655A|2009-03-31|2010-10-21|Nissin Kogyo Co Ltd|Mechanical disc brake|
    US20150354651A1|2014-06-09|2015-12-10|Daegu Gyeongbuk Institute Of Science And Technology|Electro-mechanical brake|
    FR3045758B1|2015-12-21|2018-01-05|Foundation Brakes France|ELECTROMECHANICAL DISK BRAKE COMPRISING A TRANSMISSION COMPRISING AN UNEQUAL WEAR OF THE SAME WAFER|
    CN107269741B|2017-07-28|2019-02-19|江苏理工学院|A kind of brake system of car using electric operator|
    DE102018203368A1|2018-03-07|2019-09-12|Continental Teves Ag & Co. Ohg|Caliper of a fixed caliper brake with an electric motor-operated parking brake|
    FR3097605B1|2019-06-19|2021-06-11|Foundation Brakes France|Dual actuator brake caliper, disc brake and associated braking method|
    法律状态:
    2016-11-21| PLFP| Fee payment|Year of fee payment: 2 |
    2017-07-07| PLSC| Search report ready|Effective date: 20170707 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 3 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 5 |
    2021-09-10| ST| Notification of lapse|Effective date: 20210806 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1563494A|FR3046446B1|2015-12-31|2015-12-31|DISC BRAKE CALIPER WITH INTEGRATED ELECTRIC ACTUATOR|
    FR1563494|2015-12-31|FR1563494A| FR3046446B1|2015-12-31|2015-12-31|DISC BRAKE CALIPER WITH INTEGRATED ELECTRIC ACTUATOR|
    EP16816608.0A| EP3397872B1|2015-12-31|2016-12-08|Fixed caliper of disc brake with integrated electrical actuator|
    DE16816608.0T| DE16816608T1|2015-12-31|2016-12-08|FIXED BRAKE CALIPER OF A DISK BRAKE WITH INTEGRATED ELECTRIC ACTUATOR|
    PCT/EP2016/080190| WO2017114645A1|2015-12-31|2016-12-08|Fixed caliper of disc brake with integrated electrical actuator|
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