• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    The invention proposes a disk brake comprising a fixed support arm comprising a C-shaped housing, a slideway (32) which surrounds the walls of the housing, a braking pad (18) comprising two lateral lugs (26) each of which is received in a housing with the interposition of a slide (32), and an elastic return spring (48) of the braking pad (18) to its inactive position comprising a fixing portion on the fixed support characterized in that the portion having a fastening tab (52), at least one wing of the slide (32) has a fastening tab (466), and the fastening tab (52) and the fastening tab (466) have complementary means liaison by cooperation of complementary forms.
    公开号:FR3033378A1
    申请号:FR1551891
    申请日:2015-03-06
    公开日:2016-09-09
    发明作者:Alexandre Foucoin；Didier Montegu；Xavier Labarre
    申请人:Foundation Brakes France SAS；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION The invention relates to a disk brake comprising at least one resilient return spring of a braking pad, an elastic return spring, a guide rail and a replacement kit. motor vehicle. The invention relates in particular to a disc brake including a resilient return spring of a brake shoe having means for compensating for the wear clearance of a friction lining of the brake shoe. BACKGROUND OF THE INVENTION The invention relates for example to a motor vehicle disc brake of the type described and shown in the French patent application FR-A1-3,004,500 which comprises: a brake disc which is extends in a plane transverse to an axis of axial orientation of rotation of the disk; a fixed support relative to a chassis of the vehicle; at least one braking pad, each of which comprises a friction lining whose transverse friction face cooperates with an associated braking track of the disk, the braking pad being mounted sliding axially in the support between an active front position in which said face friction is in abutment against the associated annular track of the disk, and an inoperative rear position in which said friction face is spaced axially from said associated annular track of the disk, a determined set of operation; - At least one elastic return spring of the braking shoe to its inactive position, which is for example interposed between the braking pad and the support.
    [0002] 3033378 2 In a disc brake, the sliding of the brake pads to their active position is controlled by a piston. The two braking pads strongly pinch the disc to slow its rotation. The braking operation is thus an active operation. The braking pads are pushed back to their idle position by the rotating disk. It is therefore a passive operation. It happens, however, that the disc does not push the 10 brake pads with enough force to spread them away from the disc. This may for example occur when the sliding of the brake pads is of insufficient quality or seized, or if the design creates "restitution".
    [0003] Although the braking pads are no longer actively tightened against the disc, each of the annular tracks of the disc nevertheless continuously rubs against the friction lining carried by the associated braking shoe. The friction linings thus undergo premature non-functional wear.
    [0004] In addition, this permanent friction is likely to cause a damaging heating for certain components of the disc brake. This permanent friction also causes the appearance of a residual torque which opposes the rotation of the disc. This increases the fuel consumption of the vehicle, while decreasing the performance of the vehicle. To solve these wear and heat-up problems, the above-mentioned document proposes a disk brake in which the elastic return spring comprises means 30 for compensating a set of wear of the friction pad of the braking pad. which plastically deform when the stroke of the braking pad to its active position is greater than said determined set of operation.
    [0005] To this end, the elastic return spring, which is interposed between the fixed support of the disk brake and an associated braking pad, comprises at least one axially oriented section which is elastically deformable by traction between a state of rest. and a state of maximum elongation whose value is equal to the determined set of operation, the spring comprising at least one plastically deformable section, under the effect of an axial tensile force, forming said means of catching up the play. wear, this plastically deformable section being shaped to be plastically elongated when the stroke of the braking pad to its active position is greater than the determined set of operation. According to the embodiment proposed in this document, the elastic return spring comprises in particular a fixing portion of the elastic return spring on the fixed support, and a rigid branch of axial general orientation whose free end section is shaped. to cooperate with the associated braking pad. According to another known design, the free end section is fixed on the braking pad.
    [0006] Such designs result in complex assembly and assembly to ensure cooperation of the return spring with the brake pad, or its attachment to the brake pad. These disadvantages also exist when the return spring does not include a plastically deformable section. BRIEF SUMMARY OF THE INVENTION In order to overcome this drawback, the invention proposes a disk brake characterized in that it comprises: a brake disk which extends in a plane transverse to an axis of axial orientation rotation of the disc; A fixed support comprising at least two opposite arms of generally vertical orientation each comprising an axial recess with a C-shaped cross-section horizontally open in the direction of the opposite arm and which is delimited by an upper face and by a lower face; horizontal general orientation; for each one arm of the fixed support, a slideway which follows the walls of the housing, which is fixed to the fixed support and which comprises at least one axial sliding upper section with a C-shaped section which is received and locked in the housing associated, this upper part having a horizontal lower wing, a horizontal upper wing, and a vertical bottom wing which connects the two lower and upper wings; at least one braking shoe comprising two opposing mounting side lugs each of which is received in an associated housing of an associated arm with the interposition of a said slide; wherein said at least one braking pad comprises a vertical transverse plate which carries a friction lining 20 whose transverse friction face cooperates with an associated braking track of the disk, the braking pad being axially slidably mounted in the fixed support between an active forward position in which said friction face bears against the associated brake track of the disc, and an inactive rear position in which said friction face is spaced axially from said associated brake track of the disc, from a game determined operation; and at least one elastic return spring of the braking shoe to its inoperative position comprising at least one attachment portion of the elastic return spring on the fixed support, and comprising a rigid connection branch, of axial orientation parallel to the sliding direction of the braking shoe, which is connected to the braking shoe, characterized in that: the fixing portion of the elastic return spring on the fixed support comprises a fixing lug which extends towards the front in an axial direction parallel to the sliding direction of the braking pad; at least one wing of the slideway associated with this spring comprises a fixing tongue which extends axially towards the rear; the fixing lug and the fastening tongue comprise complementary means of connection by cooperation of complementary shapes. According to other characteristics of the disk brake: the complementary means of connection by cooperation of complementary shapes of the fastening tongue and the fixing lug co-operate by elastic engagement during their assembly; the fixing tongue is a band which extends in an axial plane; the fixing lug is a strip which extends in a plane parallel to said axial plane; the fastening tongue and the fastening tab are adjacent, plane to plane; said complementary connection means comprise at least one transversely oriented finger orthogonal to said axial plane which is carried by the fixing lug and which is received in a notch formed in the fastening tab; the free end end section of the connecting branch is a strip which extends in a vertical axial plane orthogonal to the plane of the disc and which constitutes said fastening tab; - The bracket is shaped as a clamp in which is received the fastening tab; Said gripper comprises said strip and a parallel blade carrying said finger; the fixing lug comprises a stabilizing lug of the elastic return spring which cooperates with a portion of said slide; said stabilizing tab extends transversely and horizontally from an axially oriented edge of the fastening tab and cooperates with a portion of a horizontal wing of the slide; Said one horizontal wing of the slideway comprises a stabilizing tongue which extends axially rearwardly in the horizontal plane of said horizontal wing, and the stabilizing lug bears on an upper face of the stabilizing tongue; The fixing lug of the resilient return spring comprises an abutment lug which is in contact, axially forwards, with an abutment face opposite the slide; said stop tab extends from said axially oriented edge of the fastening tab; Said at least one wing of the slide which comprises the fastening tongue is the vertical bottom flange of the slideway; the resilient return spring comprises means for compensating a set of wear of the brake pad friction lining, which plastically deforms when a stroke of the braking shoe to its active braking position, is greater than said determined set of operation; - The elastic return spring is formed in one piece by cutting and forming a sheet of material. The invention proposes an axial resilient return spring 30 of a braking pad, a disk brake, to an inactive position, in which the elastic return spring comprises: a portion for fixing the elastic return spring on a fixed support of a disk brake; and a connecting branch which is connected, directly or indirectly, to the braking shoe; characterized in that the securing portion of the resilient return spring on the fixed support comprises a fixing lug which extends forwardly in an axial direction parallel to the sliding direction of the braking shoe, and which comprises complementary means of connection, by cooperation of complementary shapes, with a component fixed on the fixed support.
    [0007] According to other characteristics of the elastic return spring: - it comprises means of catching a set of wear of a friction lining of the braking pad, which are interposed between said fixing portion and said rigid branch, 15 and which deform plastically when a stroke of the braking pad, in an axial direction of displacement to an active braking position, is greater than a determined set of operation; it is made in one piece by cutting and forming a sheet of material. The invention also proposes a guide slide in axial sliding of a braking pad of a disk brake which matches the walls of a housing complementary to a fixed support of the disk brake, and which comprises a sliding part. 25-section C-shaped having a horizontal lower wing, a horizontal upper wing, and a vertical bottom wing which connects the two lower and upper wings together, characterized in that at least one wing of the slide has a tongue of fastening which extends axially and which comprises complementary connection means, by cooperation of complementary shapes, with an elastic return spring of the braking shoe.
    [0008] According to another characteristic of the slide, it is made in one piece by cutting and forming a sheet of material. The invention proposes a replacement kit for a motor vehicle disc brake according to the invention, characterized in that it comprises at least one braking pad and two resilient return springs matched to said braking pad, each of which is realized. according to the invention. The replacement kit may further comprise two springs for mounting the brake pad in the disc brake. BRIEF DESCRIPTION OF THE FIGURES Other features and advantages of the invention will become apparent on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which: FIG. 1 is an exploded perspective view which represents a disk brake comprising an example of an elastic return spring in one piece according to the state of the art; - Figure 2 is a front view which shows the fixed support of the disc brake of Figure 1 provided with slides for receiving elastic return springs of an associated brake shoe; FIG. 3A is a diagrammatic perspective view illustrating an exemplary embodiment in which each lug of a braking pad is equipped with a "radial" spring; Figure 3B is a detail view of the representation in Figure 3A; FIG. 4 is a partial perspective view illustrating the assembly of a braking pad with a radial spring in an arm of a yoke forming a fixed support provided with an attached slide; FIGS. 5 and 6 are two views illustrating in detail the design of a lamellar element forming a slider according to the state of the art; Figure 7 is a detail perspective view showing a resilient return spring of the plastically deformable one-piece brake pad according to a design alternative; Figure 8 is a perspective view illustrating an exemplary embodiment of a slide of a disk brake according to the invention adapted to allow the attachment of an elastic return spring; FIG. 9 is a perspective view illustrating an exemplary embodiment of an elastic return spring according to the invention designed for its attachment to the slideway illustrated in FIG. 8; FIG. 10 is a perspective view illustrating the components of FIGS. 8 and 9 in assembled position, the assembly being illustrated mounted on the disk brake and in a "new" state of the elastically and plastically non-deformed resilient return spring; . DETAILED DESCRIPTION OF THE FIGURES In the rest of the description, elements having an identical structure or similar functions will be designated by the same references. We will adopt without limitation and without reference to the Earth's gravity, axial, vertical and transverse orientations with reference to the trihedron "A, V, T" of the figures.
    [0009] The axial orientation "A" is directed from back to front, parallel to an axis "B" of rotation of the disc 12. The horizontal plane is defined as being a transverse axial plane.
    [0010] FIG. 1 diagrammatically shows a disc brake 10 of a motor vehicle. This is a disk brake 10 called "floating caliper" or "sliding caliper". In known manner, the disk brake comprises a disk 12 which is rotatably mounted about an axially oriented axis "B" of rotation. The disc 12 is secured in rotation with a wheel (not shown) of the motor vehicle. The disc brake 10 comprises a support 14, also called clevis, which is fixedly mounted relative to the chassis (not shown) of the vehicle. The fixed support 14 overlaps a peripheral edge 16 of the disc 12. Two opposing braking pads 18, rear and front (also called inside and outside) are mounted sliding axially in the fixed support 14 on either side of the disc 12.
    [0011] The two rear brakes 18, front and rear, have a structure and an arrangement on the fixed support 14 which are symmetrically identical to a median vertical transverse plane. Thereafter, only the rear braking pad 18 will be described on the left in consideration of FIG. 1, the description being applicable to the braking pad 18 before reversing the front and rear directions. The rear brake pad 18 is in the form of a vertical transverse friction support plate 19. The rear brake pad 18 has a front face 20, which is oriented towards a rear face 22 opposite the disk 12 which is in the form of an annular track. The front face 20 carries a friction lining 24 whose transverse and vertical face before friction 25 is able to cooperate with the face 22 of the disk 12. Each of the opposite transverse ends of the braking pad 18 comprises a lateral lug 26 which is sliding 3033378 11 sliding, with play, in a housing or slide 28 associated with an associated arm 27 of the yoke or fixed support 14. Each slide 28 is of axial orientation and present, in section by a vertical and transverse plane orthogonal to A 5 and B axes, a form of "C" open transversely to the associated lateral ear 26 of the braking pad 18. The slide 28 is delimited transversely by a bottom 30 of axial orientation and generally vertical, and it is delimited vertically , upwards by an upper horizontal and axial face 33, and downwards by an upper horizontal and axial face 31. A slideway 32 is here interposed transversely re each side ear 26 and the associated slide 28. The design of such a slide is illustrated and described in detail in document FR-A1-3,005,127.
    [0012] Each slideway 32 is a lamellar element formed by a leaf spring with a "C" section which matches the walls of the associated slide 28 (see in particular FIG. 4). Each lug 26 is here received in axial sliding in its housing 28 associated with the interposition of a lamellar element 32 associated spring steel. As illustrated more particularly in FIGS. 5 and 6, such a lamellar element 32 in the form of a slideway comprises an axially oriented, so-called sliding, top portion 452 with a C-shaped section which is received and locked in the housing. 28 associated, which comprises a first lower flange 424 of generally horizontal general orientation, which is interposed between the sliding leg 108 of the shoe spring 100 and the lower face 31 of the housing 28 of the fixed support 14.
    [0013] The upper portion 452 has a second upper horizontal prop support flange 425, which is interposed between an upper horizontal facet of the associated lateral lug 26 of the braking pad 18 and the upper horizontal face 33. The lamellar member 32 further includes an axially oriented, lower support portion 454 having a third transverse support wing 428 that extends the glide wing 424, which vertical plane orthogonal to the plane of the glide wing 424. The lower bearing portion 454 is arranged in contact with a transverse bearing resurfacing surface 420 belonging to the arm 27 of the fixed support 14, and is capable of forming a transverse stop for an associated vertical lower facet 37 of the brake shoe 18. Thus, the lamellar element 32 comprises a first lower flange 424 of sliding which is generally parallel to the second upper flange 425 vertical support.
    [0014] The two upper horizontal wings 425 and 424 are interconnected by a wing or bottom 34 of vertical and axial orientation which is arranged facing the vertical bottom 30 of the housing 28, and which is interposed between the lateral ear 26 and the vertical bottom 30 of the housing or slide 28.
    [0015] In addition, the third transverse support flange 428, outside the housing 28, is substantially orthogonal to the first lower glide wing 424. The lamellar element 32 further comprises an axial immobilization upper portion 458, which extends the second upstanding wing 425 and which cooperates with a complementary portion 460 of the arm 27 to axially immobilize the lamellar element 32. relative to the arm 27. The first lower glide wing 424 has an anchor tongue 456 which is cut into the first downwardly projecting lower flange 424 and cooperates with the lower face 33 of the housing 28 to anchor in this lower face 33 of the housing 28, as shown in Figures 5 and 3033378 13 6, and thus to ensure a "plane-to-plane" contact between the flange 425 and the associated surface vis-à-vis. As illustrated in FIGS. 4 and 6, the complementary portion 460 of the arm is shaped into a stud of axial length less than that of the housing 28 and the immobilization portion 458 of the lamellar element 32 essentially comprises a fourth vertical wing 462 from which extend two tabs 464 which enclose the portion 460 in the form of a stud which constitutes an axial abutment with which the two opposed tabs 464 cooperate. The slide or lamellar element 32 allows a determined degree of movement braking shoe 18 in the fixed support 14, that is to say, generally but not limited to, an axial sliding movement, and a transverse sliding movement accompanying the rotation of the disc 12, during a braking action. Without limitation, each side lug 26 may be equipped with a so-called mounting spring, of the type described and shown in FR-A1-2.925.636 and an example of which is illustrated in detail in FIGS. 3A, 3B and 4. FIG. 4 illustrates the assembly of a mounting spring on a lateral lug 26 and the fitting of the lug thus equipped in an associated slideway 32. FIGS. 3A, 3B and 4 are diagrammatically shown, A spring 100 for mounting the braking pad 18, also called a radial spring, capable of equipping the lugs 26 with a braking pad 18 for mounting and guiding the braking pad 18 in the associated axial slides 28 of the support fixed 14, with or without the presence of slides 32.
    [0016] In known manner, each pad spring 100 comprises a lower sliding leg 102 which cooperates with a lower horizontal face of the associated slide and which solicits an upper horizontal facet of the ear 26 bearing vertically upwards against a upper face vis-à-vis the slide 28. According to the illustrated embodiment, the spring 100 of the shoe is commonly called "snail spring" and it comprises a leg 104 bearing under a lower horizontal facet of the ear 26 of the braking shoe 18, this arm 104 forming part of a fastening branch, or clip, 106 which resiliently clips the ear 26 to ensure the fixing of the shoe spring 100 on the ear 26.
    [0017] The shoe spring 100 further comprises a curved limb 108 which connects the attachment limb 106 to the lower sliding limb 102 primarily providing elasticity to the slipper spring 100. The brake shoe 18 is thus slidably mounted in accordance with a axial direction, parallel to the axis of rotation B of the disc 12, in the fixed support 14 on an operating stroke between: - an active front position in which the front transverse friction face 25 of the friction lining 24 is in support against the face 22 facing the disc 12; and 20 - an inoperative rear position in which the front transverse friction face 25 of the friction lining 24 of the braking pad 18 is axially spaced from the associated face 22 of the disk 12, with a determined operating clearance "J1 ".
    [0018] During a braking operation, the clamping of the braking pads 18, from their inactive position to their active position, is controlled by a brake caliper 36 of the disk brake 10. In known manner, the caliper 36 comprises an arch 38 which extends axially above the fixed support 14 by covering it and two rear and front wings 40 which extend radially from the rear and front end edges of the arch 38 towards the axis "B".
    [0019] The front wing 42 extends facing the front brake pad 18, and the rear wing 40 extends opposite the rear brake pad 18. The yoke 36 is here mounted to slide axially with respect to the fixed support 14 by means of two parallel guide columns 44 each of which is slidably received in an associated axial bore 45 of the fixed support 14. In known manner, the yoke 36 rear wing 40 of the caliper 36 carries at least one axial piston 46, a front transverse face of support 10 is likely, during a braking operation, to cooperate with the transverse face facing the rear brake pad 18 to urge it axially forward, to exert an axial force of clamping the front transverse face of friction 25 of the friction lining 24 bearing against the face 22 opposite the disc 12. By reaction, the yoke 36 slides axially rearward and, symmetrically, the front wing 42 urges the braking pad 18 forward to clamp the rear frictional face 25 of the friction lining 24 of the braking pad 18 20 av against the front face 22 opposite the disc 12. When, after the braking operation, the piston 46 stops urging the rear brake pad 18, the return of the braking pads 18, from their active position to their inactive position, is generally caused by the rotation of the disk 12 which "pushes" each braking pad 18 to its inactive position. Nevertheless, in some cases, it has been found that the repulsive force exerted by the disk 12 is not sufficient to push each of the braking pads 18 to its respective inactive position. The friction lining 24 of the braking pads 18 thus continues to rub against the disc 12, while no action of clamping the friction linings of the braking pads by the stirrup 36 is controlled.
    [0020] After a braking operation, to ensure that each braking pad 18 returns to an inactive position, the disk brake 10 is provided with elastic return means of the braking pad 18 to its inoperative position. These elastic return means are made in the form of resilient return springs which are interposed between the braking pad 18 and the fixed support 14. The disk brake 10 comprises by way of nonlimiting example four elastic return springs 48 , also called "spreader" springs, each of which - without limitation - is here arranged between an arm 27 of the fixed support 14 and an associated lateral lug 26 of a braking pad 18. Thus, a braking pad 18, rear or front, is here associated with two resilient return springs 48 each of which 15 cooperates, directly or indirectly, with the plate 19 friction lining. Without limitation, the four springs 48 of elastic return are of the same overall design and they are arranged in the same way on the fixed support 14. The design principle 20 of only one of these springs 48 elastic return of the skid rear brake 18 will be described here in detail. An elastic return spring 48 is in the form of a metal strip, for example of steel, of rectangular section whose width extends vertically and which is produced for example by cutting, stamping and bending a metal sheet. stainless steel of constant thickness. Referring in particular to Figure 7, an elastic return spring 48 comprises a first portion 50, said fixing, generally in the form of a bracket 52 of the spring 48 on the fixed support 14, which is connected to the end of a first rigid branch B1 and which extends in an orthogonal plane to be fixed, for example by riveting, on an associated part of the fixed support 14.
    [0021] Starting from the first rigid rectilinear branch of axial orientation B1, the elastic return spring 48 is successively extended by three other rigid straight branches B2, B3 and B4 respectively.
    [0022] The first branch B1 has its proximal end connected to the elbow 54, while its distal end is located axially out of the slider 28 to be connected to the second rigid branch B2. The second rigid branch B2 is connected to the first rigid branch B1 by a first deformable first ply P1. Like the first branch B1, the second rigid branch B2 is shaped in a strip in the extension of the first rigid branch B1. So that the first bend P1 shaped elbow 15 is a plastically deformable zone, this portion is weakened mechanically, here by means of a window or light F1 which is here a rectangular opening opening. In the same way, the third rigid branch B3 is connected to the second rigid branch B2 by a second fold 20 plastically deformable P2. The second fold P2 is a bent portion of the web of material having a window F2. Finally, the fourth branch B4 is connected to the third rigid branch B3 by a third plastically deformable fold P3. The third fold P3 comprises a window F3 similar to the windows F1 and F2. The fourth rigid branch B4 is rectilinear and of general axial orientation parallel to the first rigid branch B1 and is extended here by a front free end section intended to be connected directly to the associated braking shoe 18.
    [0023] The free end end section is here made by extension of the constituent band Bi branches. According to the designs illustrated in FIG. 1 or FIG. 7, the front free end portion of the resilient return spring 48 is shaped as an active tab 62 which is angled at right angles to act directly on a screw portion. with respect to the friction lining plate (FIG. 1) or to be fixed directly on an associated part of the braking shoe 18 (FIG. 7), and for example of its friction lining plate 19. In the figures, the elastic return spring 48 is shown in a "new" initial state, that is to say before any plastic deformation of the plies Pi. In this state, new or initial, the first branch B1 and the fourth rigid branch B4 are substantially parallel to each other and axially oriented by being arranged at a transverse distance from one another. In the state - not shown - of maximum plastic deformation of the elastic return spring 48, the first and fourth rigid branches B1 and B4 are always substantially parallel, axially oriented and spaced from each other substantially from the same distance, while the three ply Pi have been deformed plastically. For example, the thickness of the web of material is between 0.5 and 0.8 millimeters and the material is a reference stainless steel X2CrNbCu21 or reference 304L (X2CrNi18-9 / X2CrNi19-11). For example, the maximum displacement corresponding to a maximum wear "J2" is equal to about 14 millimeters.
    [0024] When the braking pad 18 is biased towards its active position by the piston 46, it first runs through the path corresponding to the set clearance "J1" of operation.
    [0025] During this first part of the race, the braking pad 18 drives the branch B4 of the elastic return spring 48 so as to elastically tighten the elastic return spring 48 between the fixing portion 50 fixed to the fixed support 14, and the branch B4 connected to the braking pad 18. The elastically deformable portions of the elastic return spring 48 then reach their maximum elongation state. Pi folds deform, first elastically, then plastically.
    [0026] The front transverse face of the friction lining 24 of the braking pad 18 is further spaced, with respect to the associated annular face or track of the disk 12, by a distance equal to the wear clearance "J2". The braking pad 18 continues its axial stroke to its active position.
    [0027] During this second part of the race, the elastically deformable parts being no longer able to deform "elastically", the clamping force is transmitted to plastically deformable folds Pi of the elastic return spring 48. The plies Pi are then plastically deformed, the Elastic deformations of the plastically deformable parts being negligible with respect to their plastic deformation. When the braking operation ends, the braking pad 18 is returned to its inactive position by the elastically deformable parts which resume their rest state.
    [0028] The braking pad 18 is thus again spaced from the disk 12 by a distance equal to the only set "J1" of operation; the play "J2" of wear having been absorbed by the plastic deformation of plastically deformable folds Pi. The elastic return spring 48 thus ensures that the braking pad 18 is returned to its inactive position. In addition, the arrangement of plastically deformable folds Pi makes it possible to prevent the clamping force to be exerted by the piston 46 to actuate the braking pad 18 towards its active position to become too high. "J1" play of constant operation between the brake pad 18 in the inactive position and the disc 12, the response time of the braking system remains constant regardless of the wear of the friction lining 24. A maximum complete wear of the With the friction lining, the elastic return spring 48 is plastically deformed and, like the worn braking pad 18, it must be replaced. According to the two conceptions illustrated diagrammatically in FIGS. 1 and 7, the elastic return spring comprises, in an integrated manner, the active tab 62 intended to "act" on the braking pad, and in particular on the stuffing plate 19.
    [0029] A first design according to the invention will now be described according to which the resilient return spring 48 is connected and fixed indirectly to an arm of the fixed support 14, that is to say to a slide 32 equipping the associated arm 27. More specifically, the attachment portion 50 of the elastic return spring 48 on the fixed support 14 comprises a fixing lug 52 which extends axially forward in a direction parallel to the direction of sliding of the braking pad 18, while the vertical flange 34 of the slideway 32 associated with this spring has a fastening tab 466 which extends axially rearwardly. The fixing lug 52 and the securing tongue 466 comprise complementary means for cooperatively connecting complementary shapes which allow the two components to be assembled by elastic interlocking in the axial direction.
    [0030] Referring to FIGS. 8 and 9, it will be seen that both the fastening tab 52 and the fastening tab are each a vertical, axially oriented plane strip.
    [0031] The fixing tongue 466 extends in the extension of the vertical flange 34, and the fixing lug 52 extends in the extension of the connecting branch B4. In the assembled position, the fixing tongue 466 and the fixing lug 52 are adjacent, plane to plane (see FIG. 10). The complementary connection means furthermore comprise a finger 72 of transverse orientation orthogonal to the axial plane and which is carried by the fixing lug 52. For this purpose, the fixing lug 52 is shaped in a clip in which the tongue of fixation 466 is received axially. The clamp consists of the strip constituting the fixing lug 52 and a parallel blade 68 which carries the finger 72 which is oriented transversely towards a face facing each other 53 of the fixing lug. The blade 68 is made by means of a puncture in the fixing lug 52 and the transverse distance separating the faces facing the fixing lug 52 and the blade 68 is substantially equal to the thickness of the fixing tongue 466.
    [0032] To receive the finger 72, the fixing tongue 466 comprises a cutout 468 constituting a notch in which the finger 72 engages. The fixing lug 52 comprises a tab 212 for stabilizing the elastic return spring 48 which cooperates with a portion of the upper horizontal flange 425 of the slide 32. The stabilizing lug 212 extends transversely and horizontally from an upper edge 208 of axial orientation of the bracket 52, in favor of a bend bent at right angles 213.
    [0033] The upper horizontal flange 425 of the slide 32 includes a stabilizing tongue 470 which extends axially rearwardly in the horizontal plane of the horizontal flange 425, and the stabilizing tab 212 is in vertical abutment 3033378 22 by its lower face 215 on an upper face 472 of the stabilizing tongue 470. The fixing lug 52 of the elastic return spring 48 comprises a stop lug 202 which is in contact, axially towards the front, with an abutment face. vis-à-vis 474 of the slide 32 to block the axial sliding of the elastic return spring 48 in the direction corresponding to the axial displacement of the brake pad 18 to its active braking position. The stop lug 202 extends from the axially oriented edge 208 of the bracket 52. With the aid of a bent elbow 203, the stop lug extends in a vertical axial plane and its vertical front edge 205 is adapted to cooperate with the horizontal edge vis-à-vis constituting the abutment face 474. In mounted position and assembly of the spring 48 on the slideway 32, the elastic return spring 48 cooperates only with the slideway 32, without being in contact or bearing on the arm 27. When assembling the two components, that is to say when, by a relative axial movement, the elastic return spring 48 is coupled to the associated slide 32, the complementary means 20 for connecting by cooperation of complementary shapes cooperate by elastic interlocking. This leads to the state illustrated in FIG. 10. Two functional zones have been added to a slide according to the state of the art. The first zone 25 in the form of a clip 25 and tongue allows "clipping" of the elastic return spring on the fastening tab 466, and thus a first implementation and its holding while waiting for its "arming". The second zone 212-202 makes it possible initially to maintain the elastic return spring 48 in the radial direction, then during the operating phases of the disc brake, the stop in translation and in rotation. For rotation, the first zone also allows a recovery of effort in the tangential direction.
    [0034] By way of nonlimiting example, the active tab 62 is here shaped to cooperate with a leg of the pad spring 100, that is to say to act indirectly on the stuffing plate 19.
    [0035] Due to the design of the fastening portion 50 and the slideway 32, the two springs 48 fitted to a brake pad 18, and the two slides fitted to the two opposite arms of the fixed support 14, are not identical and interchangeable, but they constitute a pair of two associated springs 48, and two associated slides 32, matched to a front and / or rear braking pad, the design of which is symmetrical with respect to a vertical and axial axial plane. The invention is not limited to the embodiment which has just been described. In particular, it is possible to design simple structural and functional mechanical inversions between the fixing lug 52 and the fixing tongue. An assembly or kit for replacing a worn set of brake pads 18 comprises, for each brake pad, a nine brake pad 18 itself equipped with a pair of resilient return springs 48 matched to the braking pad associated. If the braking shoe is of the type equipped with pad mounting springs 100, the replacement kit comprises, for each braking pad, a new pad equipped with its two pad springs 100, one for each of its two radial ears. 26.
    权利要求:
    Claims (22)
    [0001]
    REVENDICATIONS1. A disc brake (10) of a motor vehicle comprising: - a brake disc (12) which extends in a plane transverse to an axis (A) of axial rotation orientation of the disc; a fixed support (14) comprising at least two opposite arms (27) of generally vertical orientation (V), each having an axial housing (28) of C-section open horizontally towards the opposite arm (27) and which is delimited by an upper face (31) and a lower face (33) of general horizontal orientation; - for each one arm (14) of the fixed support (14), a slide (32) which surrounds the walls of the housing (28), which is fixed to the fixed support and which comprises at least a portion (452) upper axial of a C-shaped section slip received and locked in the associated housing (28), said upper portion (452) having a horizontal lower wing (424), a horizontal upper wing (425), and a vertical bottom wing (20). (34) interconnecting the two lower (424) and upper (425) wings - at least one braking pad (18) having two opposing mounting side lugs (26) each of which is received in an associated housing (28) an arm (14) associated with interposition of a said slide (32); wherein said at least one brake pad (18) comprises a vertical transverse plate (19) which carries a friction lining (24), a transverse friction face (25) cooperates with an associated braking track (22) of the disk (12), the braking pad (18) being axially slidably mounted in the fixed support (14) between an active front position in which said friction face (25) bears against the associated braking track (22) of the disc (12), and an inoperative rear position wherein said friction face (25) is spaced axially from said associated brake track of the disc, from a determined operating clearance (J1); and at least one elastic return spring (48) of the braking pad (18) towards its inoperative position comprising at least one attachment portion (50) of the elastic return spring (48) on the fixed support (14), and having a rigid connection branch (B4), axially oriented parallel to the sliding direction of the brake shoe, and which is connected to the brake shoe (18), characterized in that: - the attachment portion (50) an elastic return spring (48) on the fixed support (14) has a fixing lug which extends forwardly in an axial direction parallel to the sliding direction of the braking shoe (18); - At least one wing (34) of the slide (32) associated with this spring comprises a fixing tongue (466) which extends axially rearwardly; the fixing lug (52) and the fixing tongue (466) comprise complementary means for connecting together complementary shapes.
    [0002]
    2. Disc brake according to claim 1, characterized in that the complementary means for connecting by cooperation complementary shapes of the fastening tongue (466) and the fixing lug (52) cooperate by elastic interlocking during their assembly. .
    [0003]
    Disc brake according to one of claims 1 or 2, characterized in that: - the fastening tab (466) is a strip which extends in an axial plane; - The fixing lug (52) is a strip which extends in a plane parallel to said axial plane; - the fixing tongue (466) and the bracket (52) are adjacent, plane to plan.
    [0004]
    Disc brake according to Claim 3, characterized in that:
    [0005]
    Said complementary connection means comprise at least one finger (72) of transverse orientation orthogonal to said axial plane which is carried by the fixing lug (52) and which is received in a notch (468) formed in the fastening tongue (466). Disc brake according to claim 3, characterized in that the front free end section of the connecting branch (B4) is a strip which extends in a vertical axial plane orthogonal to the plane of the disc (12). and which constitutes said bracket (52).
    [0006]
    6. Disk brake according to one of claims 3 or 4, characterized in that the fixing lug (52) is shaped as a clamp in which is received the fixing tongue (466).
    [0007]
    Disc brake according to claim 6 in combination with claim 5, characterized in that said clamp comprises said strip and a parallel blade (68) carrying said finger (72).
    [0008]
    8. Disc brake according to claim 1, characterized in that the fixing lug (52) comprises a stabilizing lug (212) of the elastic return spring (48) which cooperates with a portion of said slide (32).
    [0009]
    9. Disc brake according to claim 8, characterized in that said stabilizing tab (52) extends transversely and horizontally from an axially oriented edge (208) of the bracket (52) and cooperates with with a portion of a horizontal flange (425) of the slide (32).
    [0010]
    Disc brake according to claim 9, characterized in that said one horizontal flange (425) of the slideway (32) comprises a stabilizing tongue (470) extending axially rearwardly in the horizontal plane of said wing. Horizontal (425), and in that the stabilizing lug (52) bears on an upper face (472) of the stabilizing tongue (470).
    [0011]
    Disk brake according to one of the preceding claims, characterized in that the fixing lug (52) of the resilient return spring (48) has an abutment lug (202) which is in contact axially with the axle. front, with an abutment face vis-à-vis (474) of the slide (32).
    [0012]
    Disc brake according to claim 11 taken in combination with claim 9, characterized in that said stop tab (202) extends from said axially oriented edge (208) of the bracket (52). )
    [0013]
    Disc brake according to claim 1, characterized in that said at least one flange (34) of the slide (32) which has the fastening tongue is the vertical bottom flange (34) of the slideway.
    [0014]
    14. Disc brake (10) according to claim 1, characterized in that the elastic return spring (48) comprises means for catching a wear clearance (J2) of the friction lining (24) of the braking shoe (18), which deforms plastically when a stroke of the braking pad to its active braking position, is greater than said determined set of operation (J1).
    [0015]
    Disc brake (10) according to claim 1, characterized in that the resilient return spring (48) is made in one piece by cutting and forming a sheet of material.
    [0016]
    16. Spring (48) resilient axial return of a brake pad (18), a disc brake (12), to an inactive position, 30 in which the elastic return spring (48) comprises: - a attachment portion (50) of the resilient return spring (48) on a fixed support of a disk brake (14); and a connecting branch (B4) which is connected, directly or indirectly, to the braking shoe (18); characterized in that the attachment portion (50) of the resilient return spring (48) on the fixed support (14) comprises a fastening tab (52) which extends forwardly in an axial direction parallel to the sliding direction of the braking shoe (18), and which comprises complementary connecting means, by cooperation of complementary shapes, with a component (32) fixed on the fixed support (14). 10
    [0017]
    17. Spring according to claim 16, characterized in that it comprises means of catching a wear clearance (J2) of a friction lining (24) of the brake shoe (18), which are interposed between said fixing portion and said rigid leg (B4), and which deform plastically when a stroke of the braking pad (18), in an axial direction of displacement to an active braking position, is greater than one set determined operation (J1).
    [0018]
    18. Spring according to claim 16, characterized in that it is made in one piece by cutting and forming a sheet of material.
    [0019]
    19. slide (32) for guiding in axial sliding of a braking pad (18) of a disk brake (10) which surrounds the walls of a housing (28) complementary to a fixed support (14) of the disc brake, and which includes a C-shaped section sliding portion (452) having a horizontal lower wing (424), a horizontal upper wing (425), and a vertical bottom wing (34) which connects between they both lower (424) and upper (425) wings, characterized in that at least one wing (34) of the slide (32) comprises an axially extending fastening tab (466) which has complementary means of connection, by cooperation of complementary shapes, with an elastic return spring (48) of the braking pad. 3033378 29
    [0020]
    20. Slide according to claim 19, characterized in that it is made in one piece by cutting and forming a sheet of material.
    [0021]
    21. Replacement kit for a motor vehicle disc brake according to any one of claims 1 to 15, characterized in that it comprises at least one brake pad (18) and two elastic return springs (48). paired with said brake pad (18) each of which is made according to any one of claims 16 to 19. 10
    [0022]
    22. Replacement kit according to claim 21, characterized in that it further comprises two springs (100) for mounting the brake shoe in the disc brake.
    类似技术:
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    FR3005128A1|2014-10-31|"FIXED CALIPER DISC BRAKE AND STABILIZED BRAKE SHOES, AND ASSOCIATED METHODS OF ASSEMBLING AND REPLACING A SKATE"
    WO2013087868A1|2013-06-20|Spring-equipped member for guiding a disc brake pad and disc brake provided with such guiding members
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    同族专利:
    公开号 | 公开日
    JP2018508725A|2018-03-29|
    US20180051760A1|2018-02-22|
    EP3265687A1|2018-01-10|
    CN107429765B|2020-02-14|
    JP6873042B2|2021-05-19|
    FR3033378B1|2018-08-10|
    DE16707823T1|2018-04-19|
    CN107429765A|2017-12-01|
    US10746243B2|2020-08-18|
    WO2016142303A1|2016-09-15|
    EP3265687B1|2020-04-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102012016737A1|2012-08-23|2014-02-27|Lucas Automotive Gmbh|Disc brake for a motor vehicle with plastically deformable return spring and return spring|
    EP2792899A1|2013-04-16|2014-10-22|Chassis Brakes International B.V.|Disc brake equipped with elastic returning means and with plastic deformationwear compensation means for brake pads|WO2020109728A1|2018-11-29|2020-06-04|Foundation Brakes France|Self-adjusting brake pad return spring and method for manufacturing a disc brake comprising such springs|
    WO2020109693A1|2018-11-29|2020-06-04|Foundation Brakes France|Brake pad return spring comprising a hardened clip|FR2925636B1|2007-12-21|2010-04-02|Bosch Gmbh Robert|SYSTEM FOR MOUNTING DISC BRAKE PAD.|
    JP2012180905A|2011-03-02|2012-09-20|Nissin Kogyo Co Ltd|Vehicle disc brake|
    JP5837343B2|2011-06-30|2015-12-24|日立オートモティブシステムズ株式会社|Disc brake|
    FR2984438B1|2011-12-15|2014-01-17|Bosch Gmbh Robert|RADIAL SPRING OF DISC DISC BRAKE PAD AND BRAKE PADS AND BRAKES EQUIPPED WITH SUCH RADIAL SPRINGS|
    FR2984439B1|2011-12-15|2014-06-27|Bosch Gmbh Robert|SPRING BRAKE GUIDE SPRING GUIDE AND DISK BRAKE EQUIPPED WITH SUCH GUIDING BODIES|
    CN104662323B|2012-09-25|2018-01-26|日立汽车系统株式会社|Disk brake|
    US20140305753A1|2013-04-12|2014-10-16|Akebono Brake Corporation|Pad retraction clip|
    FR3005127B1|2013-04-29|2015-04-17|Chassis Brakes Int Bv|"BRAKE DISC BRAKE WITH STABILIZED BRAKES, AND ASSOCIATED METHODS OF ASSEMBLING AND REPLACING A SKATE"|
    FR3005334B1|2013-05-02|2015-04-24|Chassis Brakes Int Bv|"DISC BRAKE COMPRISING A PRELOAD SPRING OF A BRAKE PAD"|
    DE102013010876A1|2013-06-28|2014-12-31|Lucas Automotive Gmbh|Brake pad arrangement for a disc brake with a device for noise reduction|
    US9677629B2|2014-08-25|2017-06-13|Akebono Brake Industry Co., Ltd.|Multiple piece pad clip|
    DE102014014081A1|2014-09-23|2016-03-24|Lucas Automotive Gmbh|Guide means for a brake pad assembly of a disc brake and disc brake|
    FR3032505B1|2015-02-06|2017-03-17|Foundation Brakes France|"DISC BRAKE COMPRISING AT LEAST ONE ELASTIC RECALL SPRING OF A BRAKE SKATE, ELASTIC RECALL SPRING, BRAKE SKATE AND REPLACEMENT KIT"|DE102016202520A1|2016-02-18|2017-08-24|Continental Teves Ag & Co. Ohg|Friction lining arrangement with restoring spring for clearance simulation for a motor vehicle part lining disc brake|
    JP6958169B2|2017-09-22|2021-11-02|株式会社アドヴィックス|Disc brake device|
    法律状态:
    2016-02-22| PLFP| Fee payment|Year of fee payment: 2 |
    2016-09-09| PLSC| Publication of the preliminary search report|Effective date: 20160909 |
    2017-02-21| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-20| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-20| PLFP| Fee payment|Year of fee payment: 6 |
    2021-12-10| ST| Notification of lapse|Effective date: 20211105 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1551891A|FR3033378B1|2015-03-06|2015-03-06|"DISC BRAKE COMPRISING AT LEAST ONE ELASTIC RECALL SPRING OF A BRAKE SKATE, ELASTIC RECALL SPRING, GUIDE SLIDER AND REPLACEMENT KIT"|
    FR1551891|2015-03-06|FR1551891A| FR3033378B1|2015-03-06|2015-03-06|"DISC BRAKE COMPRISING AT LEAST ONE ELASTIC RECALL SPRING OF A BRAKE SKATE, ELASTIC RECALL SPRING, GUIDE SLIDER AND REPLACEMENT KIT"|
    US15/555,751| US10746243B2|2015-03-06|2016-03-04|Disc brake comprising at least one resilient return spring of a brake pad, resilient return spring, guiding slide and replacement kit|
    PCT/EP2016/054695| WO2016142303A1|2015-03-06|2016-03-04|Disc brake comprising at least one resilient return spring of a brake pad, resilient return spring, guiding slide and replacement kit|
    JP2017546759A| JP6873042B2|2015-03-06|2016-03-04|Disc brakes, elastic return springs, guide slides and replacement kits with at least one elastic return spring for the brake pads|
    DE16707823.7T| DE16707823T1|2015-03-06|2016-03-04|DISC BRAKE WITH AT LEAST ONE ELASTIC RESET SPRING OF A BRAKE PAD, ELASTIC RESET SPRING GUIDE RAIL AND REPLACEMENT KIT|
    EP16707823.7A| EP3265687B1|2015-03-06|2016-03-04|Disc brake comprising at least one resilient return spring of a brake pad, resilient return spring, guiding slide and replacement kit|
    CN201680013952.4A| CN107429765B|2015-03-06|2016-03-04|Disc brake comprising at least one elastic return spring for a brake pad, elastic return spring, guide runner and replacement kit|
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