Assembly of a brake caliper and at least one pad
阅读说明：本技术 制动卡钳与至少一个衬垫的组件 (Assembly of a brake caliper and at least one pad ) 是由 克里斯蒂安·克里帕 毛罗·曼布雷蒂 于 2018-07-11 设计创作，主要内容包括：本发明涉及制动卡钳与至少一个衬垫的组件(1),该衬垫组件包括制动卡钳(2)和至少一个制动衬垫(3)；所述至少一个制动衬垫(3)包括至少一个衬垫保持装置(4)；所述保持装置(4)被牢固地附接至所述制动衬垫(3),以防止该保持装置在制动衬垫(3)的正常使用期间相对于该制动衬垫的相关移动；所述制动卡钳(2)包括至少一个致动装置(5),该至少一个致动装置沿着推进方向(X-X)移动并向所述制动衬垫(3)施加制动作用,以使制动衬垫抵靠盘式制动器(12)的盘的至少一个制动表面(11)；所述致动装置限定了与致动装置的推进方向(X-X)正交的径向方向(Z-Z)；其中,每个致动装置(5)包括至少一个致动装置座部(6),该至少一个致动装置座部具有基本上面向所述制动衬垫(3)的至少一个座部开口(13),其中,所述座部(6)通过所述座部开口(13)接收保持装置(4)的至少一个保持装置耦接部分(14)；所述组件包括至少一个耦接环(8)；所述耦接环(8)容纳在所述座部(6)中,在所述耦接环(8)与所述座部(6)之间留有径向间隙(Gr)；所述耦接环(8)在与推进装置径向方向(Z-Z)平行的径向方向上自由移动；所述耦接环(8)容纳在所述座部(6)中,在所述耦接环(8)与所述座部(6)之间留有轴向间隙(Ga),该轴向间隙在衬垫保持装置被插入耦接环中时消除；所述耦接环(8)在与推进装置推进方向(X-X)平行的轴向方向上自由移动,并且耦接环的行程受到限制,以防止其在正常使用期间从所述座部(6)脱离；所述保持装置(4)的所述保持装置耦接部分(14)可移除地卡扣耦接至所述耦接环(8),以在至少一个制动衬垫(3)的正常使用期间使至少一个制动衬垫(3)与至少一个致动装置(5)可移除地连接。(The invention relates to an assembly (1) of a brake caliper with at least one pad, the pad assembly comprising a brake caliper (2) and at least one brake pad (3); the at least one brake pad (3) comprises at least one pad holding device (4); said retaining means (4) being firmly attached to said brake pad (3) to prevent relative movement of the retaining means with respect to the brake pad (3) during normal use thereof; said brake caliper (2) comprising at least one actuation device (5) moving along a thrust direction (X-X) and applying a braking action to said brake pads (3) to bring them against at least one braking surface (11) of the disc of a disc brake (12); said actuating means defining a radial direction (Z-Z) orthogonal to the advancing direction (X-X) of the actuating means; wherein each actuation device (5) comprises at least one actuation device seat (6) having at least one seat opening (13) substantially facing the brake pad (3), wherein the seat (6) receives at least one retaining device coupling portion (14) of a retaining device (4) through the seat opening (13); the assembly comprises at least one coupling ring (8); said coupling ring (8) being housed in said seat (6) leaving a radial gap (Gr) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in a radial direction parallel to the propulsion device radial direction (Z-Z); said coupling ring (8) being housed in said seat (6), leaving an axial gap (Ga) between said coupling ring (8) and said seat (6) which is eliminated when the pad-holding device is inserted into the coupling ring; said coupling ring (8) being free to move in an axial direction parallel to the propulsion direction (X-X) of the propulsion device and limited in its travel to prevent its disengagement from said seat (6) during normal use; the retaining device coupling portion (14) of the retaining device (4) is removably snap-coupled to the coupling ring (8) to removably connect at least one brake pad (3) with at least one actuating device (5) during normal use of the at least one brake pad (3).)
1. Assembly (1) of a brake caliper with at least one pad, comprising:
-a brake caliper (2);
-at least one brake pad (3);
-said at least one brake pad (3) comprises at least one pad holding means (4);
-the retaining means (4) is firmly attached to the brake pad (3) to prevent relative movement of the retaining means with respect to the brake pad (3) during normal use of the brake pad;
-said brake caliper (2) comprising at least one actuation device (5) moving along a thrust direction (X-X) and applying a braking action to said brake pads (3) to abut them against at least one braking surface (11) of the disc of a disc brake (12);
-said actuating means define a radial direction (Z-Z) orthogonal to said advancing direction (X-X) of said actuating means;
it is characterized in that the preparation method is characterized in that,
-each actuation device (5) comprises at least one actuation device seat (6) having at least one seat opening (13) substantially facing the brake pad (3), wherein,
-the seat (6) receives at least one retaining device coupling portion (14) of the retaining device (4) through the seat opening (13); and wherein the one or more of the one,
-the assembly comprises at least one coupling ring (8); and wherein the one or more of the one,
-said coupling ring (8) is housed in said seat (6) leaving a radial gap (Gr) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in a radial direction parallel to the propulsion device radial direction (Z-Z); and wherein the one or more of the one,
-said coupling ring (8) is housed in said seat (6), leaving an axial gap (Ga) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in an axial direction parallel to the propulsion direction (X-X) of the propulsion device and is limited in its stroke to prevent its disengagement from said seat (6) during its normal use; and wherein the one or more of the one,
-the retaining device coupling portion (14) of the retaining device (4) is removably snap-coupled to the coupling ring (8) to removably connect the at least one brake pad (3) with the at least one actuating device (5) during normal use of the at least one brake pad (3).
2. Assembly (1) according to claim 1,
-said seat (6) is delimited by a seat wall (7); and wherein the one or more of the one,
-said coupling ring (8) is housed in said seat (6) leaving a radial gap (Gr) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in a radial direction parallel to said thrust means radial direction (Z-Z), defined by said seat wall (7); and/or wherein the at least one processor is,
-said coupling ring (8) is housed in said seat (6), leaving an axial gap (Ga) between said coupling ring (8) and said seat (6); the coupling ring (8) is free to move in an axial direction parallel to the propulsion direction (X-X) of the propulsion device, and its travel is limited at least on one side by the seat wall (7) to prevent its disengagement from the seat during normal use.
3. Assembly (1) according to claim 1 or 2,
-said seat (6) comprises a seat bottom wall (19); and/or wherein the at least one processor is,
-said assembly comprises a stop element (17) arranged on a side substantially opposite to said seat bottom wall (19), said stop element (17) at least partially protruding in said seat (6) for delimiting the travel of said coupling ring (8); and/or wherein the at least one processor is,
-said seat (6) has a first seat portion (15) having a predefined transverse dimension or inner diameter (Dfp); and/or wherein the at least one processor is,
-said first seat portion (15) being at least partially inside said seat wall (7), forming a coupling seat (33), at least a portion of which does not directly face said seat opening (13); and/or wherein the at least one processor is,
-said seat (6) comprises a second seat portion (16) having a predefined transverse dimension or inner diameter (Dsp).
4. Assembly (1) according to any one of the preceding claims,
-the assembly comprises a stop element (17) received in the first seat portion (15); and wherein the one or more of the one,
-said stop element (17) is received and snap-coupled in said first seat portion (15); and/or wherein the at least one processor is,
-said stop element (17) is received and screwed to said first seat portion (15); and/or wherein the at least one processor is,
-at least one stop element wall (20) facing the seat bottom wall (19); and/or wherein the at least one processor is,
-defining a distance (ds) from the seat bottom wall (19) to the stop element wall (20); and wherein the one or more of the one,
-defining a stop element internal transverse dimension or internal diameter (Dse); and/or wherein the at least one processor is,
-said stop element (17) comprises a stop element body (29) having an open annular extension for snap insertion thereof in said first seat portion (15).
5. Assembly (1) according to any one of the preceding claims,
-the coupling ring (8) has a predefined coupling ring outer transverse dimension or outer diameter (Dre); and wherein the one or more of the one,
-said coupling ring (8) having a predefined coupling ring minimum inner transverse dimension or minimum inner diameter (Dri);
-the coupling ring (8) has a predefined coupling ring size (drx) in the direction of the advancing direction (X-X).
6. Assembly (1) according to any one of the preceding claims,
-the holding device (4) comprises at least one holding device arm (21, 22) cantilevered from a holding device base (23); and/or wherein the at least one processor is,
-said at least one arm (21, 22) being elastically movable to allow a snap coupling of said coupling ring (8); and/or wherein the at least one processor is,
-said holding means (4) comprise at least two mutually opposite arms (21, 22); and/or wherein the at least one processor is,
-said two opposite arms (21, 22) each comprise a first inclined stretch (24) diverging from each other, an elbow (25) and a second inclined stretch (26) converging towards each other, for assisting said snap-coupling; and/or wherein the at least one processor is,
-said retaining means (4) defining a maximum covering distance (Ddr) of said two opposite arms; and/or wherein the at least one processor is,
-the holding device (4) comprises a base (23) arranged parallel to the pad (3) or to a pad plate (32); and/or wherein the at least one processor is,
-the base (23) comprises a base hole (27); and/or wherein the at least one processor is,
-the base (23) receives in the base hole (27) a locking rivet riveted to a plate (28); and/or wherein the at least one processor is,
-said base (23) receiving in said base hole (27) a protrusion (31) riveted to form a stop or rivet (30) for locking said base to a plate (32) of said gasket (3).
7. Assembly (1) according to any one of the preceding claims,
-the transverse dimension or diameter of the second seat portion is greater than the outer transverse dimension or diameter of the coupling ring:
Dsp>Dre
to form said coupling ring radial gap (Gr) with respect to said seat; and/or wherein the at least one processor is,
-the dimension or height of the coupling ring in the direction of advancement (X-X) of the actuating device is smaller than the distance between the seat bottom wall and the stop element wall:
Drx<ds
to form said coupling ring axial gap (Ga) with respect to said seat.
8. Assembly (1) according to any one of the preceding claims,
-the transverse dimension or inner diameter of the stop element is smaller than the outer transverse dimension or outer diameter of the coupling ring:
Dse<Dre
to prevent the coupling ring (8) from disengaging from the seat (6).
9. Assembly (1) according to any one of the preceding claims,
-the minimum inner transverse dimension or minimum inner diameter of the coupling ring is smaller than the maximum transverse coverage distance of the opposite arms of the retaining device:
Dri<Ddr
thereby allowing the snap-coupling of the retaining device (4) in the coupling ring (8).
10. Actuation device (5) of a disc brake caliper, in which,
-said caliper is part of a brake caliper assembly and at least one pad (1), said assembly comprising:
-said brake caliper (2) and at least one brake pad (3);
-said at least one brake pad (3) comprises at least one pad holding means (4);
-the retaining means (4) is firmly attached to the brake pad (3) to prevent relative movement of the retaining means with respect to the brake pad (3) during normal use of the brake pad;
-said brake caliper (2) comprising at least one actuation device (5) moving along a thrust direction (X-X) and applying a braking action to said brake pads (3) to abut them against at least one braking surface (11) of the disc of a disc brake (12);
-said actuating means define a radial direction (Z-Z) orthogonal to a direction of propulsion (X-X) of said actuating means;
it is characterized in that the preparation method is characterized in that,
-each actuation device (5) comprises at least one actuation device seat (6) having at least one seat opening (13) substantially facing the brake pad (3), wherein,
-the seat (6) receives at least one retaining device coupling portion (14) of the retaining device (4) through the seat opening (13); and wherein the one or more of the one,
-said actuating means (5) comprise at least one coupling ring (8); and wherein the one or more of the one,
-said coupling ring (8) is housed in said seat (6) leaving a radial gap (Gr) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in a radial direction parallel to the propulsion device radial direction (Z-Z); and wherein the one or more of the one,
-said coupling ring (8) is housed in said seat (6), leaving an axial gap (Ga) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in an axial direction parallel to the propulsion direction (X-X) of the propulsion device and is limited in its stroke to prevent its disengagement from said seat (6) during its normal use; and wherein the one or more of the one,
-the retaining device coupling portion (14) of the retaining device (4) is removably snap-coupled to the coupling ring (8) to removably connect the at least one brake pad (3) with the at least one actuating device (5) during normal use of the at least one brake pad (3).
11. Brake caliper (2) of a disc brake, wherein,
-said caliper is part of a brake caliper assembly comprising said brake caliper (2) and at least one brake pad (3) and at least one pad (1);
-said at least one brake pad (3) comprises at least one pad holding means (4);
-the retaining means (4) is firmly attached to the brake pad (3) to prevent relative movement of the retaining means with respect to the brake pad (3) during normal use of the brake pad;
-said brake caliper (2) comprising at least one actuation device (5) moving along a thrust direction (X-X) and applying a braking action to said brake pads (3) to abut them against at least one braking surface (11) of the disc of a disc brake (12);
-said actuating means define a radial direction (Z-Z) orthogonal to said advancing direction (X-X) of said actuating means;
it is characterized in that the preparation method is characterized in that,
-each actuation device (5) comprises at least one actuation device seat (6) having at least one seat opening (13) substantially facing the brake pad (3), wherein,
-the seat (6) receives at least one retaining device coupling portion (14) of the retaining device (4) through the seat opening (13); and wherein the one or more of the one,
-said actuating means (5) comprise at least one coupling ring (8); and wherein the one or more of the one,
-said coupling ring (8) is housed in said seat (6) leaving a radial gap (Gr) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in a radial direction parallel to the propulsion device radial direction (Z-Z); and wherein the one or more of the one,
-said coupling ring (8) is housed in said seat (6), leaving an axial gap (Ga) between said coupling ring (8) and said seat (6); -said coupling ring (8) is free to move in an axial direction parallel to the propulsion direction (X-X) of the propulsion device and is limited in its stroke to prevent its disengagement from said seat (6) during its normal use; and wherein the one or more of the one,
-the retaining device coupling portion (14) of the retaining device (4) is removably snap-coupled to the coupling ring (8) to removably connect the at least one brake pad (3) with the at least one actuating device (5) during normal use of the at least one brake pad (3).
Technical Field
The present invention relates to a brake caliper and brake pad assembly for a brake system, such as but not necessarily exclusively for a vehicle.
In particular, the present invention relates to a brake caliper suitable for receiving at least one actuation device provided with a mechanical system capable of anchoring at least one pad of the brake caliper to prevent the pad from remaining in contact with the braking surface of the brake disc when the braking action ceases, so as to generate a residual braking torque, for example on the vehicle.
More specifically, the invention relates to a brake caliper of the type generally known under the term "point type".
The invention also relates to a disc brake and also to a vehicle comprising said assembly and/or said brake caliper.
More specifically, the invention relates to a braking device particularly suitable for, but not necessarily intended for, a vehicle.
Background
The brake caliper in a disc brake is normally arranged to straddle an outer peripheral edge of a brake disc adapted to rotate about an axis of rotation defining an axial direction (a-a). Furthermore, in the disc brake, a radial direction (R-R) substantially orthogonal to the axial direction (A-A) and a tangential direction (T-T) or a circumferential direction (C-C) orthogonal to both the axial direction (X-X) and the radial direction (R-R) are defined.
The brake calipers are constrained to a support structure that remains stationary with respect to the wheel, such as, for example, the journal of a vehicle suspension, or the wheel hub, or the front fork or rocker of a motor vehicle. The brake caliper generally comprises: a caliper disc body having two elongated portions arranged to face opposite braking surfaces of the brake disc; and at least one bridge connecting the two elongated portions to each other. Thanks to the actuating means, the callipers, which are easy to actuate, press the pads against the braking band and the braking action is generated by the friction between the pads and the braking band of the disc.
In known brake calipers there are also piston retraction means, such as the pad actuation means mentioned above, which are adapted to actuate at least one brake caliper pad. The aforementioned piston is adapted to axially translate each pad against a respective friction surface of the disc by bringing it into contact with a force, so as to generate a braking friction torque opposite to the direction of rotation of the disc. In respective seats formed in the caliper body, the aforementioned pistons are slidingly actuated, stressed (pressurized) by the user in a controlled manner by means of a pressurized brake fluid supplied by the distribution system, in order to perform braking.
The retraction means allow the piston to return to the respective seat at the end of stressing the pressurized brake fluid, allowing the pads to move away from the disc friction surface and also preventing the pads from remaining inadvertently in contact with the disc after the braking action is finished. This will in fact lead to the drawback of a residual braking torque lasting, with the negative effect that the performance of the moving vehicle decreases unacceptably and the consumption of pads and disks increases and is rapid.
Furthermore, in the event of an increase in brake pressure, the caliper body may also elastically deform, moving away from the disc friction surface due to the effect of the thrust force against the disc friction surface. At the end of such stressing of the brake fluid, the caliper body elastically recovers its original shape, also moving the piston and pads again close to the disc friction surface. In fact, the piston has a total return stroke equal to the sum of the spaces travelled to compensate for the distance between the pads and the disc and equal to the elastic return of the caliper body and the pads. In such a case, in the case of the above negative consequences, the pad may also remain pressed against the disc friction surface after the end of stressing the brake fluid.
In at least some applications, it is desirable to retract the piston with the brake pad to prevent the brake pad from remaining in contact with the disc braking surface.
Certain embodiments are known from US4467897, US4609077, US4809825, US5494140, US5701978, US5704452, US5706916, US5860495, US5881848, DE4318744, DE4335001, DE19617373, DE19857559, DE 19906804.
A solution of this type is disclosed, for example, in documents US6634469 to ContinentalTeves, AG & co.
This known solution relates to a disc brake of the "point" type for motor vehicles, having a retaining device for a brake pad coupled to a thrust piston. The retaining device is locked to the assembly support or plate of the cushion. The holding function is performed by two springs separated from each other. The first spring axially locks the pad relative to the piston, and the second spring secures the retainer to the pad plate. The two springs are actively independent of each other to prevent undesired lateral forces on the piston, which are transverse to the axial direction.
These known compensation systems for the relative position of the system for coupling the pad to the thrust piston of the caliper provide complex retention solutions in which the plurality of springs for coupling to the pad body have clearances, thus complicating the construction and management maintenance. In fact, the entire holder as a whole is also forcibly replaced with both springs each time the pad is replaced.
Furthermore, these known solutions are not always able to compensate for braking system tolerances, in particular operating tolerances, but instead usually only for component tolerances.
This known solution also slows down the assembly operations of the pads in the caliper, both in the case of maintenance and in the case of replacement of worn pads with new ones. In fact, this known solution provides a spring coupling device which is able to move slidingly with respect to the pad itself. Thus, under production, assembly, packaging and transport conditions, the known spring coupling will almost always be in a relative position with respect to the gasket, which is different with respect to the seat in which it should be received in the piston, and almost not centered, thus making the coupling operation and therefore the gasket replacement operation very difficult or even difficult, these operations now needing to take place in a very rapid time due to regular maintenance operations and increasing included prices, while at the same time always protecting the integrity and safety of the correct coupling.
Furthermore, when several pistons are provided on each caliper side and are therefore suitable for pads facing several pistons, the above-mentioned problem is exacerbated and sometimes it becomes very complex to solve it, because a plurality of movable holding means, each independent of one another, are to be centered simultaneously on the same pad.
The radial and tangential locking engagement of the spring in the piston causes undesirable lateral forces on the brake piston, which may cause the brake to tilt and therefore cause undesirable friction during movement of the piston itself. Furthermore, manufacturing tolerances of the pads and manufacturing tolerances of the caliper sometimes produce a non-centered positioning of the pads in the radial or tangential direction with respect to the piston. This means that, due to these tolerances, other undesired transverse forces occur on the piston and on the caliper body. This in turn leads to a thrust force of the piston which is not completely transverse to the pad and therefore not completely transverse to the brake disc, and correspondingly to an undesired variation in the braking torque. As a result of the variation in the braking torque of the brake, undesirable vibrations occur, such as steering wheel vibrations, for example, and thus sometimes noise or low-frequency buzzing or high-frequency whistling sounds.
Therefore, there is a strong need to couple the brake pads to the actuating means, so as to prevent stresses at least transverse to the direction of advance of the actuating means, and at the same time simplify the manufacture of the pads and facilitate the assembly operations of the pads or the replacement operations of the worn pads.
However, in particular, there is a strong need to make the assembly operations, and therefore the maintenance of the vehicle, of in particular the braking system at the time of replacement of the brake pads quick, while always ensuring maximum reliability, safety of the operations.
Disclosure of Invention
The object of the present invention is to eliminate the drawbacks of the prior art.
The object of the present invention is to provide an assembly of a brake caliper and at least one pad which allows a safe and always reliable coupling of the pad to the actuating means also when the system assembly and operating construction tolerances are significant, thus improving this solution with respect to the known solutions.
These and other objects are achieved by an assembly according to
Certain advantageous embodiments are the subject of the dependent claims.
Drawings
Other features and advantages of the device, the disc brake and the vehicle will become apparent from the following description of preferred embodiments thereof, given by way of non-limiting example with reference to the accompanying drawings, in which:
figure 1 is an isometric view of the assembly of the brake caliper and the pad;
fig. 2 shows a section of the assembly of fig. 1 according to line II-II of fig. 1;
figure 3 depicts an isometric view of an assembly of an actuating device and a brake pad according to the invention, with some hidden components indicated with dashed lines;
figure 4 shows an isometric view of the brake pad of figure 3;
figures 5 and 6 show a view according to the thrust axis of the actuating device and an axonometric view of the actuating device;
fig. 7 depicts an enlarged detail of the section in fig. 2;
figure 8 shows a section of an enlarged detail of the assembly of the actuating means with the brake pad.
Detailed Description
According to a general embodiment of the present invention, there is provided an assembly of a brake caliper, indicated as a whole with the
The at least one
The
Said
Said actuating means 5 define a radial direction Z-Z orthogonal to the advancing direction X-X of the actuating means.
Advantageously, each
The
The assembly comprises at least one
The
The
The
Said
Said retaining means
According to one embodiment, said
Said
According to one embodiment, the
Said
According to one embodiment, said
According to one embodiment, the assembly comprises a
According to one embodiment, said
According to one embodiment, said
According to one embodiment, said
According to one embodiment, the assembly comprises a
The
According to another embodiment, the
According to one embodiment, at least one
According to one embodiment, the distance from the
According to one embodiment, the internal transverse dimension or internal diameter (hereinafter designated by reference numeral Dse) of the stop element is defined.
According to one embodiment, said
According to one embodiment, said
According to one embodiment, said
According to one embodiment, said
According to one embodiment, the holding
According to one embodiment, said at least one
According to one embodiment, the retaining means 4 comprise at least two mutually
According to one embodiment, said two
According to one embodiment, said retaining means 4 define a maximum coverage (footprint ) distance of the two opposite arms (hereinafter indicated with reference Ddr).
According to one embodiment, the holding
According to one embodiment, the
According to one embodiment, the
According to one embodiment, said
According to one embodiment, said transverse dimension or diameter of the second seat portion is greater than said external transverse dimension or external diameter of the coupling ring:
Dsp>Dre
to form said coupling ring radial gap Gr with respect to the seat.
According to one embodiment, said dimension or height of the coupling ring in the direction of advancement (X-X) of the actuating device is smaller than said distance between the seat bottom wall and the stop element wall:
drx<ds
to form said coupling ring axial gap Ga with respect to the seat.
According to one embodiment, the transverse dimension or inner diameter of the stop element is smaller than the outer transverse dimension or outer diameter of the coupling ring:
Dse<Dre
to prevent the
According to one embodiment, said minimum inner transverse dimension or minimum inner diameter of the coupling ring is smaller than said maximum transverse coverage distance of the opposite arms of the retaining device:
Dri<Ddr
thus allowing a snap coupling of the retaining means 4 in said
The invention also relates to an actuating device for a
The at least one
The retaining means 4 is firmly attached to the
The actuating means define a radial direction Z-Z orthogonal to the advancing direction X-X of the actuating means.
Advantageously, each
Said
The
The
The
The
Said
The retaining
The invention also relates to a brake caliper of a
The at least one
The retaining means 4 is firmly attached to the
Said
The actuating means define a radial direction Z-Z orthogonal to the advancing direction X-X of the actuating means.
Advantageously, each
Said
Said actuating means 5 of said
The
Said
The retaining
Thanks to the features of this solution, the coupling of the pads to the actuating means, for example to the thrust piston of the caliper, can be provided by a simple retaining structure in the actuating means, leaving a gap directly provided in the caliper, thus making the construction and management maintenance simple. In fact, each time the gasket is replaced, only the fixed retaining means are replaced, while the coupling portion is not replaced, which provides a defined gap useful for compensating construction tolerances.
Furthermore, the inventive solutions always enable compensation of braking system tolerances, in particular operating tolerances, and also assembly tolerances.
These solutions also speed up the assembly operations of the pads in the caliper, both in the case of maintenance and in the case of replacement of worn pads with new ones. In fact, this solution provides a spring coupling device which is fixed to the gasket itself in its optimal position, thus never being eccentric with respect to the theoretical assembly position. Thus, again, during production, assembly, packaging and transport, the retaining means will be in a fixed position with respect to the gasket, again centred with respect to the seat in which it should be received in the piston, so as to make the coupling operation and therefore the gasket replacement operation very simple, even negligible.
Furthermore, when several pistons and therefore pads adapted to face several pistons are provided on each caliper side, the ease of replacement becomes even more evident by not having to center several retaining means at the same time, but rather making them always perfectly aligned with the seat of the actuating means.
Due to the provision of the clearances Gr and Ga, the radial and tangential locking engagement of the retaining means in the piston will prevent undesired transverse forces on the brake piston, and thus prevent it from tilting, and thus from causing undesired friction during the movement of the piston itself. Obviously, said axial gap Ga is eliminated when the pad holding device is inserted in the coupling ring. Furthermore, manufacturing tolerances of the pads and the caliper sometimes produce a non-centered positioning with respect to the piston in the circumferential direction of the pads, which in any case can be compensated by the solution provided herein. This means that other undesired transverse forces on the piston and on the caliper body are prevented. This in turn makes it possible to always ensure a thrust of the piston substantially completely transverse to the pad and therefore completely transverse to the brake disc. The result will be that the variation in the braking torque of the brake is absent or drastically reduced, for example, preventing undesired vibrations such as steering wheel vibrations and thus sometimes preventing noise or low frequency buzzing and/or high frequency whistling.
Thus, the need to couple the brake pads to the actuating means is satisfied, thus preventing stresses at least transverse to the direction of advance of the actuating means, and at the same time simplifying the manufacture of the pads and facilitating the assembly operations of the pads or the replacement operations of worn pads.
In particular, the need is met to make the assembly operations, and therefore the maintenance of the vehicle, particularly of the braking system, quick when replacing the brake pads, while at the same time always ensuring maximum reliability, safety of the operations.
However, a person skilled in the art may make many changes and adaptations to the embodiments described above or may substitute functionally equivalent further elements to meet the contingent needs, without thereby departing from the scope of protection of the following claims.
List of reference numerals
Assembly or assembly of a brake caliper and at least one pad
2 brake caliper
3 at least one brake lining
4 pad holding device or holding device
5 actuating device
6 actuator seats or seats
7 actuator seat delimiting or seat wall
8 coupling ring
9 radial gap or radial gap of coupling ring
10 coupling ring axial gap or axial gap
11 braking surface of a brake disc
12 disc brake disc
13 seat opening
14 holding device coupling part
15 first seat part
16 second seat portion
17 stop element or stop ring
18 first seat part wall
19 bottom wall of seat
20 stop element wall
21 holding device arm
22 holder arm
23 holding device base
24 first extension of the tapered arm
25 elbow part
26 second extension of the closing arm
27 base hole
28 to plate locking rivet
29 stop element body
30 riveting piece
31 plate protrusion
32 liner panel
Axial direction of A-A disc brake parallel to or coincident with the axis of rotation of the brake disc
R-R radial direction orthogonal to axial direction A-A
Tangential or circumferential directions T-T or C-C orthogonal to the axial direction A-A and to the radial direction R-R
Propulsion direction of X-X actuator
Z-Z radial direction orthogonal to the propulsion direction X-X of the actuating device
Radial clearance of Gr with respect to the coupling ring of the seat
Coupling ring axial gap of Ga relative to seat
The transverse dimension or diameter of the Dfp first seat portion
Transverse dimension or diameter of the Dsp second seat portion
distance between ds seat bottom wall and stop member wall
Transverse dimension or internal diameter of Des stop element
Outer lateral dimension or outer diameter of Dre coupling ring
Minimum inner transverse dimension or minimum inner diameter of Dri coupling ring
Ddr maximum lateral coverage distance of opposite arms of holding device
The dimension or height of the drx coupling ring in the direction X-X
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