Brake lining

Abstract

The utility model discloses a brake friction plate. The brake friction plate comprises a plate-shaped body; the body is provided with a plate surface, the two or more cantilever parts are formed at one end in the plate surface direction of the body and extend in the direction away from the body in the plate surface direction of the body, and the mass parts are connected to the extending ends of the cantilever parts. The length of the cantilever part is set to be the length of the cantilever part extending out of the body, and the width of the cantilever part is set to be the distance between two opposite side faces, parallel to the thickness direction, of the cantilever part. The length, the width and the thickness of the cantilever part and the weight of the mass part are set to enable the brake friction plate to absorb noise smaller than 4 KHz.

Description

Technical Field

[0001] The present application relates to a vehicle and / or industrial field, and more particularly, to a brake friction pad for a brake caliper used in a vehicle and / or industrial field. Background Art

[0002] As is well known, brake calipers used in existing vehicles are typically equipped with brake pads that engage the caliper to decelerate the vehicle when a user applies the brakes. However, during braking, mechanical vibrations occur between the known brake pads and the pins, caliper body, brake disc, and other structures that engage with them. This mechanical vibration is the cause of noise, or so-called squeal, during braking.

[0003] Existing brake systems typically reduce noise by modifying and optimizing the structural design of the brake caliper or brake disc, or by adding mass to the friction pad. However, existing brake calipers are unable to eliminate low-frequency whine, which occurs below approximately 4kHz.

[0004] Therefore, the problem to be solved by the present invention is to design a brake friction pad having structural and functional characteristics that meet the above requirements while eliminating the disadvantages mentioned with reference to the prior art. Utility Model Content

[0005] The purpose of the present utility model is to provide a brake friction pad, so as to solve the technical problems described above with reference to the prior art.

[0006] In particular, the object of the present invention is to provide a brake friction pad capable of eliminating or at least partially reducing the phenomenon of noise generated in a disc brake using the brake friction pad, thereby improving the comfort of a vehicle equipped with a brake caliper.

[0007] This object and advantage, as well as other objects and advantages, are achieved by the brake friction pad according to the embodiments of the present application.

[0008] An embodiment of the present application provides a brake pad, which includes: a plate-shaped body; two or more cantilever portions, the cantilever portion being formed at one end in the plate surface direction of the body and extending along the plate surface direction of the body in a direction away from the body; at least one mass member, the mass member being connected to the protruding end of the cantilever portion, the length of the cantilever portion being set to the length of the cantilever portion extending out of the body, the width of the cantilever portion being the distance between two opposite side surfaces of the cantilever portion parallel to the thickness direction, the length, width, thickness of the cantilever portion and the weight of the mass member being configured to enable the brake friction pad to absorb noise less than 4 kHz.

[0009] In some embodiments, the mass member is provided on only one cantilever portion.

[0010] In some embodiments, the mass member is provided on all the cantilever portions, and the cantilever portions have different lengths and widths.

[0011] In some embodiments, the weight of the mass member, the length, width, and thickness of the cantilever portion on which the mass member is provided are configured to satisfy the following formula:

[0012]

[0013] Wherein, fn represents the frequency that the brake friction pad can eliminate, K represents the stiffness of the cantilever part, I represents the moment of inertia, E represents the elastic modulus, L represents the length of the cantilever part, b represents the width of the cantilever part, h represents the thickness of the cantilever part, and m represents the weight of the mass part.

[0014] In some embodiments, the length of the cantilever portion does not exceed the edge of the contour surface of the rim on which the brake friction pad is mounted, and the width is greater than or equal to 1.2 times the thickness.

[0015] In some embodiments, the weight of the mass member is greater than or equal to 0.05 times the weight of the brake friction pad.

[0016] In some embodiments, the length of the cantilever portion is determined by a gap between the brake pad and an adjacent component engaged with the brake pad.

[0017] In some embodiments, the length of the cantilever portion may be in the range of 10 mm to 50 mm. In some embodiments, the length may be, for example but not limited to, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, or 45 mm.

[0018] In some embodiments, the thickness of the cantilever portion may be in the range of 4 mm to 7 mm. In some embodiments, the width may be, for example but not limited to, 4.5 mm, 5 mm, 5.5 mm, 6 mm, or 6.5 mm.

[0019] In some embodiments, the width of the cantilever portion can be in the range of 4.8 mm to 20 mm. In some embodiments, the width can be, for example, but not limited to, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, or 19 mm.

[0020] In some embodiments, the mass may have a weight in the range of 15 g to 70 g. In some embodiments, the mass may have a weight of, for example but not limited to, 20 g, 30 g, 40 g, 50 g, or 60 g.

[0021] In some embodiments, the frequency fn may be in the range of 1000 Hz to 4000 Hz. In some embodiments, the frequency fn may be 1500 Hz, 2000 Hz, 2500 Hz, or 3000 Hz.

[0022] In some embodiments, the weight of the mass member is greater than the weight of the cantilever portion.

[0023] In some embodiments, the protruding end of the cantilever portion is provided with a through hole for receiving the mass member.

[0024] In some embodiments, the protruding end of the cantilever portion and the mass member are connected by bolt connection, riveting, or a combination of riveting and gluing.

[0025] In some embodiments, an ear is provided at the formed end of the cantilever portion of the brake friction pad, wherein the ear is formed into a curved protrusion, a gap is formed between the ear and the body, and a gap is formed between the protruding end of the ear and the side surface of the adjacent cantilever portion. The gap is used to allow a fixing member to pass through to fix the brake friction pad to the brake caliper of the vehicle.

[0026] In some embodiments, the mass has a cylindrical shape.

[0027] In some embodiments, the cantilever portion itself is symmetrical with respect to a center line along the extending direction of the cantilever portion.

[0028] In some embodiments, the width of the cantilever portion is greater than or equal to 1.2 times the thickness of the body.

[0029] The brake friction pad provided by embodiments of the present application provides the following beneficial technical effects. The brake friction pad comprises: a plate-shaped body; two or more cantilevered portions, each formed at one end of the body in the direction of the plate surface and extending away from the body along the plate surface; and at least one mass member connected to the protruding ends of the cantilevered portions. The length of the cantilevered portion is defined as the length of the cantilevered portion extending from the body, and the width of the cantilevered portion is defined as the distance between two opposing side surfaces of the cantilevered portion parallel to the thickness direction. In the brake friction pad, the length, width, thickness of the cantilevered portion, and the weight of the mass member are specifically configured or selected to eliminate or at least partially mitigate noise generated by a disc brake using the brake friction pad, thereby improving the ride comfort of vehicles equipped with brake calipers. For example, the length, width, thickness of the cantilevered portion, and the weight of the mass member are specifically configured or selected to enable the brake friction pad to absorb noise below 4 kHz, such as 3 kHz, 2 kHz, or 1 kHz.

[0030] Furthermore, thanks to the proposed technical solution, a mechanically strong and robust brake friction pad can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present application and its further advantageous and further embodiments are described and explained in more detail below with reference to the examples shown in the accompanying drawings. According to the present application, the features derived from the description and the drawings can be used alone or together in any combination. In the drawings:

[0032] Figure 1 is a schematic diagram of a brake friction pad according to an embodiment of the present application;

[0033] Figure 2 is a front view of a brake friction pad according to an embodiment of the present application;

[0034] Figure 3 for Figure 1 and Figure 2 An exploded view of the cantilever portion and mass member of the brake friction pad shown;

[0035] Figure 4 To follow Figure 3 A cross-sectional view of the cantilever portion taken along the center line AA;

[0036] Figure 5 is a front view of a brake friction pad according to another embodiment of the present application;

[0037] Figure 6 is a schematic diagram of a mass member used in a brake friction pad according to an embodiment of the present application;

[0038] Figure 7 This is a test chart of the sound pressure level (SPL) and frequency of a conventional brake friction pad without a mass member;

[0039] Figure 8 This is a test chart of frequency and temperature of a conventional brake friction pad without a mass part;

[0040] Figure 9 A test chart showing the sound pressure level (SPL) and frequency of the cantilever portion provided with a single mass member of the present application; and

[0041] Figure 10 This is a test chart showing the frequency and temperature of a cantilever portion provided with a single mass member in the present application. DETAILED DESCRIPTION

[0042] The illustrations in the accompanying drawings are schematic. It should be noted that in different drawings, similar or identical elements or features are provided with the same reference numerals or reference numerals that differ from the corresponding reference numerals only in the first digit. To avoid unnecessary repetition, elements or features that have already been explained with respect to the preceding embodiments are not explained again at the subsequent description point.

[0043] In addition, spatially relative terms, such as "front" and "rear", "upper" and "lower", "left" and "right", etc., are used to describe the relationship of one element to another element as shown in the figures. In this way, spatially relative terms can be applied to orientations in use that are different from the orientations depicted in the figures. Obviously, all such spatially relative terms refer to the orientations shown in the figures for ease of description only and are not necessarily limiting, as the device according to the embodiments of the present application can assume orientations different from those illustrated in the figures when in use. For example, the expressions "inner" and "outer" used in this application are relative positions with respect to the rotation axis of the brake caliper using the brake friction pad of the present application, and the meaning of such expressions can be easily understood by a person of ordinary skill in the art in conjunction with the description herein and the figures.

[0044] Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "coupled" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0046] The present application provides a brake friction pad 1 .

[0047] In an embodiment of the brake friction pad 1 of the present application, the brake friction pad 1 may include: a plate-shaped body 2; two or more cantilever portions 3, which may be formed at one end in the plate surface direction of the body 2 and may extend along the plate surface direction of the body 2 in a direction away from the body 2; and at least one mass member 4, which may be connected to the protruding end 38 of the cantilever portion 3.

[0048] In some embodiments, the length of the cantilever portion 3 can be the length of the cantilever portion 3 extending out of the main body 2, the width of the cantilever portion 3 can be the distance between two opposite side surfaces of the cantilever portion 3 parallel to the thickness direction, and the length, width, thickness of the cantilever portion and the weight of the mass member 4 can be set to enable the brake friction pad 1 to absorb noise less than 4KHz.

[0049] exist Figures 1 to 4 In the illustrated embodiment of the brake pad 1 of the present application, the body 2 may be a generally rectangular plate. Specifically, the body 2 may have a first major surface 22, a second major surface 24 opposite and parallel to the first major surface 22, and a side portion located between the first and second major surfaces 22, 24. Friction material may be provided on one of the first and second major surfaces 22, 24 of the body 2, such that when the brake pad 1 is engaged with a vehicle's brake caliper, the other of the first and second major surfaces 22, 24 may face the brake caliper, while the friction material may face the brake disc, thereby interacting with the brake disc during braking.

[0050] It is understandable that the rectangular shape is only a schematic structure of the body 2 , and its specific shape can be changed accordingly according to the specific installation situation and usage conditions of the brake friction pad 1 , thereby ensuring the wide applicability of the brake friction pad 1 .

[0051] In the embodiment of the present application, the brake friction pad 1 may include two or more cantilever portions 3. Figures 1 to 4 In the embodiment of the brake friction pad 1 of the present application shown, the brake friction pad 1 includes two cantilever portions 3. It will be understood that the number of cantilever portions 3 shown here is only schematic, and the brake friction pad 1 may also include more cantilever portions 3 depending on different vehicles and manufacturing requirements.

[0052] In the embodiment shown, the brake friction pad 1 includes two cantilever portions 3, the cantilever portion 3 can extend away from the main body 2 on the first side portion 26 of the side portion, and the cantilever portion 3 can have a first surface 32, a second surface 34 opposite to and parallel to the first surface 32, and a circumferential side wall 36 located between the first surface 32 and the second surface 34, the circumferential side wall 36 includes a first side wall 362, a second side wall 364, and an arc-shaped protruding end side wall 366 connecting the first side wall 362 and the second side wall 364.

[0053] according to Figure 2 As can be seen from the structure shown, the extended end side wall 366 can be located at the extended end 38 of the cantilever portion 3 .

[0054] In the embodiment shown, the two cantilever portions 3 can extend away from the body 2 at the same side. It is understood that the two cantilever portions 3 can extend outward on different sides of the body 2. For example, one cantilever portion 3 can extend outward from the body 2 at the first side 26, and the other cantilever portion 3 can extend away from the body 2 at a side adjacent to the first side 26, for example. Figure 2 The left or right side of the body 2 is shown extending outward away from the body 2. For another example, one cantilever portion 3 may extend away from the body 2 on one side of the body 2, while the other cantilever portion 3 may extend away from the body 2 on the opposite side. The placement of the cantilever portions 3 shown in the drawings is merely schematic and for ease of understanding. The specific placement of the cantilever portions 3 may be adaptively changed according to the specific structure of the brake caliper using the brake friction pad.

[0055] In the structure shown in the drawings, the cantilever portion 3 may extend perpendicularly to the side of the body 2. It is understood that such a perpendicular arrangement is merely illustrative, and the cantilever portion 3 may be arranged at an angle to the side.

[0056] According to the structure shown in the figure, the thickness h of the cantilever portion 3 may be the distance between the first surface 32 and the second surface 34 measured in a direction perpendicular to the first surface 32 or the second surface 34 .

[0057] The length L of the cantilever portion 3 may be a distance between the farthest point of the cantilever portion 3 from the first side portion 26 and the first side portion 26 , measured in a direction perpendicular to the first side portion 26 .

[0058] The width b of the cantilever portion 3 may be the distance between the first side wall 362 and the second side wall 364 along the extending direction of the first side portion 26 .

[0059] In the illustrated embodiment, the cantilever portion 3 and the surface of the body 2 can be arranged flush, that is, the first surface 32 of the cantilever portion 3 and the first main surface 22 of the body 2 can be coplanar, and the second surface 34 of the cantilever portion 3 and the second main surface 24 of the body 2 can be coplanar. In this flush arrangement, the thickness of the cantilever portion 3 is the same as that of the body 2. It will be understood that this arrangement is merely illustrative, and the cantilever portion 3 can also be arranged to protrude or recess relative to the body 2 in the thickness direction.

[0060] That is, by arranging the first surface 32 and the first main surface 22 in different planes and / or arranging the second surface 34 and the second main surface 24 in different planes, the thickness of the cantilever portion 3 can be different from the thickness of the body 2. For example, the thickness of the cantilever portion 3 can be greater than or less than the thickness of the body 2. The specific arrangement of the first surface 32 and the second surface 34 of the cantilever portion 3 can be adaptively changed according to the specific structure of other devices engaged with the brake friction pad 1.

[0061] In some embodiments, the cantilever portion 3 itself may be symmetrical with respect to a center line along the extension direction of the cantilever portion 3. For example Figure 3 As shown, the cantilever portion 3 may be symmetrical with respect to the center line AA of its own extension direction, thereby ensuring the mechanical stability of the cantilever portion 3 structure.

[0062] exist Figures 1 to 4 In the embodiment shown in which the brake friction pad 1 of the present application includes two cantilever portions 3 , the brake friction pad 1 may further include a mass member 4 , which may be disposed at the protruding end 38 of one of the two cantilever portions 3 .

[0063] In some embodiments, a through hole 382 may be provided at the protruding end 38 of the cantilever portion 3 for receiving the mass member 4 .

[0064] In a preferred embodiment, the center line of the through hole 382 may intersect with the center line AA of the extension direction of the cantilever portion 3 .

[0065] The extended end 38 of the cantilever portion 3 and the mass member 4 can be connected by some common methods in the art. For example, in some embodiments, the extended end 38 of the cantilever portion 3 and the mass member 4 can be connected by bolting, riveting, or a combination of riveting and gluing.

[0066] In some embodiments, the bolt connection between the protruding end 38 of the cantilever portion 3 and the mass member 4 can be performed using M5 screws.

[0067] In some embodiments, the protruding end 38 of the cantilever portion 3 and the mass member 4 can be riveted together in the following manner: the mass member 4 itself can be provided with a rivet (e.g., a square column or cylindrical rivet), which can be passed through the through hole 382 (correspondingly a square hole or a round hole) of the cantilever portion 3. The rivet is then deformed and expanded within the through hole 382 by stamping or riveting, thereby forming a rigid connection between the mass member 4 and the cantilever portion 3. In a preferred embodiment, the central axis of the rivet can coincide with the central axis of the mass member 4.

[0068] In some embodiments, the combination of riveting and gluing of the protruding end 38 of the cantilever portion 3 and the mass member 4 can be achieved as follows: considering that the riveting process may become unstable due to prolonged use, so that the connection strength may become unstable, an adhesive, such as glue, can be additionally applied between the contact surfaces of the mass member 4 and the cantilever portion 3 to enhance the stability of the connection between the mass member 4 and the cantilever portion 3.

[0069] like Figure 3 and Figure 6 As shown in (a) of FIG. , the mass member 4 can have a cylindrical shape. It will be appreciated that the cylindrical shape of the mass member 4 is merely illustrative and that the mass member 4 can also have other shapes. Due to the mechanical stability of the engagement between the mass member 4 and the through-hole 382 of the cantilever portion 3, the specific shape of the mass member 4 can be varied based on the shape of the through-hole 382 of the cantilever portion 3 and the specific engagement method. In other words, the mass member 4 only needs to have a shape that ensures stable engagement between the mass member 4 and the cantilever portion 3.

[0070] In the embodiment shown in the present application, the cylindrical shape is the preferred form (for example, it can be derived through frequency response functions and experiments) because the cylindrical shape can match the shape of the circular through hole 382 in the cantilever portion 3 for accommodating the mass member 4.

[0071] Of course, if Figure 6 As shown in (b) and (c) of FIG. 3 , the mass member 4 may also have an L-shaped structure. In addition, the mass member 4 may also have other non-illustrated special-shaped structures, as long as the mass member 4 can be tightly engaged with the extended end 38 of the cantilever portion 3 .

[0072] For example, in Figure 6 As shown in (a), the mass member 4 can be a cylindrical structure with a hole. It is understood that the mass member 4 can be connected to the cantilever portion 3 with a circular hole through a coupling device. In some embodiments, the coupling device can be a pin, a rivet, a threaded cylindrical member, etc. In some embodiments, the coupling device can be a separate structure from the mass member 4. In some embodiments, the coupling device can be integrated with the mass member 4.

[0073] For example, Figure 6 As shown in (b), the mass member 4 has an L-shaped structure with a square recess at the joint area. It can be understood that the mass member 4 can be joined to the cantilever portion 3 with a square protrusion through a joining device. Figure 6 As shown in (c), the mass member 4 has an L-shaped structure and has an L-shaped recess at the joining area. It can be understood that the mass member 4 can be joined to the cantilever portion 3 having the L-shaped protrusion through a joining device. Figure 6 The structures shown in the figure are schematic. The mass member 4 can also be an L-shaped structure with a protrusion. Accordingly, the shape of the cantilever portion 3 matching the mass member 4 will also change accordingly. For example, the cantilever portion 3 can be provided with an L-shaped recess so that the mass member 4 and the cantilever portion 3 can be tightly joined in structure. No further details will be given here.

[0074] In addition, in some embodiments, the brake pad 1 may further include an ear 5 for fixing the brake pad 1 to the brake caliper of the vehicle. Figures 1 to 4 As shown, the ear portion 5 can be disposed at the end of the cantilever portion 3 of the brake pad. The ear portion 5 can be formed as a curved protrusion. A gap 52 can be formed between the ear portion 5 and the body 2. A clearance can be formed between the protruding end of the ear portion 5 and the adjacent side of the cantilever portion 3. The gap 52 can be used to pass a fixing member through to secure the brake pad 1 to the vehicle's brake caliper.

[0075] In some embodiments, the fixing member may be a bolt, a pin, or other fixing device.

[0076] It is understood that in this embodiment, the number of ears 5 is two, which is only for illustration. In different embodiments, for mechanical stability, more ears 5 may be provided, such as 3, 4 or more ears 5.

[0077] In the brake friction pad 1 of the embodiment of the present application, the length L, width b and thickness h of the cantilever portion 3 provided with the mass member 4 and the weight m of the mass member 4 are adjusted so that they cooperate with each other to adjust the frequency of vibration absorption by the mass member 4, so that the cantilever portion 3 and the mass member 4 jointly form a dynamic vibration absorption effect, thereby enabling the brake friction pad 1 to eliminate noise less than 4KHz.

[0078] In some embodiments, the brake friction pad 1 of the present application can also cooperate with each other to further adjust the frequency of vibration absorption by the mass part 4 by adjusting the length L, width b and thickness h of a cantilever portion 3 without a mass part 4, the length L, width b and thickness h of the cantilever portion 3 with a mass part 4, and the weight m of the mass part 4, so that they form a dynamic vibration absorption effect together with the mass part 4, so that the brake friction pad 1 can eliminate noise less than 4KHz.

[0079] Specifically, in some embodiments, the weight of the mass member 4, and the length, width, and thickness of the cantilever portion 3 on which the mass member 4 is provided are set to satisfy the following formula:

[0080]

[0081] Wherein, fn represents the frequency that the brake friction pad 1 can eliminate, K represents the stiffness of the cantilever portion, I represents the moment of inertia, E represents the elastic modulus, L represents the length of the cantilever portion, b represents the width of the cantilever portion, h represents the thickness of the cantilever portion, and m represents the weight of the mass member.

[0082] In some embodiments, the weight m of the mass member 4 can be kept constant, and the noise elimination effect of the brake friction pad 1 can be adjusted by changing the length L and width b of the cantilever portion 3, thereby achieving the effect of eliminating low-frequency noise, for example, below 4 kHz.

[0083] In some embodiments, the length of the cantilever portion 3 may not exceed the edge of the contour surface of the rim on which the brake friction pad 1 is mounted, and the width may be greater than or equal to 1.2 times the thickness.

[0084] In some embodiments, the weight of the mass member 4 can be greater than or equal to 0.05 times the weight of the brake pad 1. It should be understood that during the manufacturing or assembly process of the brake pad 1, the ratio of the weight of the mass member 4 to the weight of the brake pad 1 should be greater than or equal to 0.05. If the mass member 4 is manufactured too light, or the ratio of the weight of the mass member 4 to the weight of the brake pad 1 is manufactured to be less than 0.05, the vibration absorption effect of the brake pad 1 may be ineffective, and the generated low-frequency noise may not be eliminated.

[0085] In some embodiments, the weight of the mass member 4 may be much greater than the weight of the cantilever portion 3 .

[0086] In some embodiments, the length L of the cantilever portion 3 is determined by the gap between the brake pad 1 and an adjacent component that engages with the brake pad 1 .

[0087] In some embodiments, the length L of the cantilever portion 3 may be in the range of 10 mm to 50 mm. In some embodiments, the length L may be, for example but not limited to, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, or 45 mm.

[0088] In some embodiments, the thickness h of the cantilever portion 3 may be in the range of 4 mm to 7 mm. In some embodiments, the thickness h may be, for example but not limited to, 4.5 mm, 5 mm, 5.5 mm, 6 mm, or 6.5 mm.

[0089] In some embodiments, the width b of the cantilever portion can be in the range of 4.8 mm to 20 mm. In some embodiments, the width b can be, for example, but not limited to, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, or 19 mm.

[0090] In some embodiments, the weight m of the mass member 4 may be in the range of 15 g to 70 g. In some embodiments, the weight m may be, for example but not limited to, 20 g, 30 g, 40 g, 50 g, or 60 g.

[0091] In some embodiments, the frequency fn may be in the range of 1000 Hz to 4000 Hz. In some embodiments, the frequency fn may be 1500 Hz, 2000 Hz, 2500 Hz, or 3000 Hz.

[0092] In addition, the applicant conducted a comparative experiment on a conventional brake friction pad without a mass part in the prior art and a brake friction pad 1 with a mass part 4 in the present application according to standard number SAE J 2521 (disc and drum pad squeal noise matrix), thereby showing the effect of different brake friction pads on noise elimination. Figure 7 and Figure 8 A test chart of sound pressure level (SPL) versus frequency and a test chart of frequency versus temperature of a conventional brake friction pad without a mass member are shown respectively. Figure 9 and Figure 10 Taking the brake friction pad 1 provided with a single mass member 4 as an example, a test chart of sound pressure level (SPL) and frequency, and a test chart of frequency and temperature of the brake friction pad 1 of the present application are respectively shown.

[0093] exist Figure 7 It can be seen from the test chart of sound pressure level and frequency that the conventional brake friction pad without mass parts still has high sound pressure values ​​at the frequencies of 2-3kHz and 8-9kHz, especially at the frequency of 2-3kHz, the sound pressure value is higher. Figure 8It can be seen from the frequency and temperature test chart that during the operation of a conventional brake friction pad without a mass part, there is almost always a noise of about 2kHz throughout the entire change process of the temperature curve (indicated by the yellow wavy line) during the braking action. In particular, when the temperature changes from about 0°C to about 400°C, a noise frequency of about 8kHz is even generated (as indicated by the blue breakpoint line fw at the top), which is extremely uncomfortable for users of the vehicle.

[0094] However, in contrast, Figure 9 The test graph of the sound pressure level and frequency of the brake friction pad 1 provided with a single mass member 4 according to the embodiment of the present application shows that there is almost no sound pressure value at any frequency, that is, the brake friction pad 1 of the present application almost eliminates all noise during braking, especially noise less than 4kHz. Figure 10 During the operation of the brake friction pad 1 provided with a single mass member 4 in the embodiment of the present application shown, there is almost no noise of any frequency in the entire change process of the temperature curve (shown by the yellow wavy line) during the braking action, that is, the brake friction pad 1 of the present application almost eliminates all noise during the braking action, especially noise less than 4kHz.

[0095] according to Figures 7 to 10 From the content shown, it can be clearly seen that the brake friction pad 1 of the present application has advantages over the existing conventional brake friction pad in eliminating noise in the braking device, especially in terms of low-frequency noise that is difficult to eliminate with the existing brake friction pad. The brake friction pad 1 of the present application has a good noise elimination effect.

[0096] also, Figure 5 The brake friction pad 1 according to another embodiment of the present application is also shown. Figures 1 to 4 The brake pad 1 shown has partially identical or similar structures. The following primarily describes the differences between this embodiment and the illustrated embodiment. Identical or similar structures are denoted by the same reference numerals and will not be described again. The brake pad 1 of this embodiment differs from the aforementioned brake pad 1 in the arrangement of the cantilever portion 3 and the mass member 4.

[0097] Specifically, the brake friction pad 1 may include more than two cantilever portions 3. For ease of understanding, in this embodiment, three cantilever portions 3 are used as an example for description, and the specific arrangement is also applicable to the arrangement of more cantilever portions 3, such as 4, 5, 6 or more cantilever portions 3.

[0098] In the illustrated embodiment, the three cantilever portions 3 can extend away from the body 2 on the first side 26 in a spaced-apart manner. It is understood that the three cantilever portions 3 can extend outward on different sides of the body 2. For example, one cantilever portion 3 can extend outward from the body 2 at the first side 26, and another cantilever portion 3 can extend away from the body 2 at a side adjacent to the first side 26, for example, at Figure 5 The left side or right side of the body 2 shown extends outwardly away from the body 2. For another example, one cantilever portion 3 can extend away from the body 2 at one side of the body 2, while the other cantilever portion 3 can extend away from the body 2 on the opposite side. Figure 5 The arrangement position of the cantilever portion 3 shown is only for illustration and ease of understanding. The specific arrangement position of the cantilever portion 3 can be adaptively changed according to the specific structure of the brake caliper using the brake friction pad.

[0099] In the structure shown in the drawings, the cantilever portion 3 can extend entirely perpendicular to the side of the body 2. It is understood that this vertical arrangement is merely illustrative, and the cantilever portion 3 can also be partially or entirely arranged at an angle to the side.

[0100] In the illustrated embodiment, the surfaces of the cantilever portions 3 and the body 2 can all be arranged flush, that is, the first surfaces 32 of the three cantilever portions 3 and the first major surface 22 of the body 2 can all be in the same plane, and the second surfaces 34 of the three cantilever portions 3 and the second major surface 24 of the body 2 can all be in the same plane. In this flush arrangement, the thickness of the cantilever portions 3 is the same as that of the body 2. It will be understood that this arrangement is merely illustrative, and the cantilever portions 3 can also be partially or completely arranged to protrude or recess relative to the body 2 in the thickness direction.

[0101] That is, by arranging the first surface 32 of part or all of the cantilever portion 3 and the first main surface 22 in different planes and / or arranging the second surface 34 of part or all of the cantilever portion 3 and the second main surface 24 in different planes, the thickness of part or all of the cantilever portion 3 can be different from the thickness of the body 2. For example, the thickness of part or all of the cantilever portion 3 can be greater than or less than the thickness of the body 2. The specific arrangement of the first surface 32 and the second surface 34 of the cantilever portion 3 can be adaptively changed according to the specific structure of other devices engaged with the brake friction pad 1.

[0102] In some embodiments, part or all of the cantilever portion 3 itself may be symmetrical with respect to a center line along the extension direction of the cantilever portion 3 , thereby ensuring the mechanical stability of the cantilever portion 3 structure.

[0103] In some embodiments, the brake pad 1 may include more than two mass members 4. For ease of understanding, this embodiment is described using three mass members 4 as an example, and the specific configuration is also applicable to the configuration of more mass members 4, such as 4, 5, 6, or more mass members.

[0104] It should be noted that in an embodiment with more than two cantilever portions 3 or mass members 4, the number of cantilever portions 3 and mass members 4 is corresponding, that is, the number of cantilever portions 3 and mass members 4 is equal, and each cantilever portion 3 is provided with a mass member 4.

[0105] exist Figure 5 In the illustrated embodiment, the brake friction pad 1 may further include three mass members 4 , and each mass member 4 may be disposed at the protruding end 38 of each cantilever portion 3 .

[0106] In the illustrated embodiment, a through hole 382 may be provided at the protruding end 38 of each cantilever portion 3 for receiving the mass member 4 .

[0107] The extended end 38 of the cantilever portion 3 and the mass member 4 may also be connected by methods commonly used in the art. For example, in some embodiments, the extended end 38 of the cantilever portion 3 and the mass member 4 may be connected by bolting, riveting, or a combination of riveting and gluing.

[0108] In embodiments with more than two cantilever parts 3, each cantilever part 3 is preferably connected to the mass member 4 in the same manner. In some embodiments, each cantilever part 3 may be connected to the mass member 4 in a different manner.

[0109] In this embodiment, the mass member 4 preferably has a cylindrical shape. It will be appreciated that the cylindrical shape of the mass member 4 is merely illustrative and that the mass member 4 may also have other shapes. Due to the mechanical stability of the engagement between the mass member 4 and the through-hole 382 of the cantilever portion 3, the specific shape of the mass member 4 may be varied based on the shape of the through-hole 382 of the cantilever portion 3 and the specific engagement method. Specifically, the mass member 4 may have a shape that ensures stable engagement between the mass member 4 and the cantilever portion 3.

[0110] In the brake friction pad 1 of the embodiment of the present application, the length L, width b and thickness h of the cantilever portion 3 and the weight m of the mass member 4 are set and coordinated with each other, so that the brake friction pad 1 can eliminate low-frequency howling phenomenon less than 4KHz.

[0111] Specifically, the weight of each mass member 4, and the length, width, and thickness of each cantilever portion 3 provided with the mass member 4 are set to also satisfy the following formula:

[0112]

[0113] Wherein, fn represents the frequency that the brake friction pad 1 can eliminate, K represents the stiffness of the cantilever portion, I represents the moment of inertia, E represents the elastic modulus, L represents the length of the cantilever portion, b represents the width of the cantilever portion, h represents the thickness of the cantilever portion, and m represents the weight of the mass member.

[0114] In this embodiment, each cantilever portion 3 is provided with a mass member 4, and each cantilever portion 3 has a different length and width. The cantilever portions 3 of different lengths and widths cooperate with each mass member 4 to produce a vibration-absorbing combination corresponding to multiple frequency bands, allowing the brake friction pad 1 to eliminate noise in more than two frequency bands.

[0115] In some embodiments, the weight m of the mass member 4 can be kept constant, and the noise elimination effect of the brake friction pad 1 can be adjusted by changing the length L and width b of each cantilever portion 3, thereby achieving the effect of eliminating low-frequency noise, for example, below 4 kHz.

[0116] Furthermore, it is understood that the brake friction pads provided by the embodiments of the present application are reproducible and can be used in a variety of industrial applications, particularly in the automotive field.

[0117] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

[0118] List of reference numerals:

[0119] 1 brake friction pad

[0120] 2 body

[0121] 22 first main surface

[0122] 24 second main surface

[0123] 26 first side

[0124] 3 Cantilever

[0125] 32 Page 1

[0126] 34 Page 2

[0127] 36 circumferential sidewall

[0128] 362 first side wall

[0129] 364 second side wall

[0130] 366 extended end side wall

[0131] 38 extension end

[0132] 382 through hole

[0133] 4 Quality parts

[0134] 5. Ears

[0135] 52 pores.

Claims

1. A brake friction pad, characterized in that: The brake friction pad (1) comprises: Plate-shaped body (2); Two or more cantilever parts (3), each of which is formed at one end of the main body (2) in the plate surface direction and extends in a direction away from the main body (2) along the plate surface direction of the main body (2), at least one mass member (4), the mass member (4) being connected to the protruding end (38) of the cantilever portion (3), The length of the cantilever portion (3) is set to be the length of the cantilever portion (3) extending out of the body (2), the width of the cantilever portion (3) is set to be the distance between two opposite side surfaces of the cantilever portion (3) parallel to the thickness direction, and the length, width, thickness of the cantilever portion and the weight of the mass member (4) are set to enable the brake friction pad (1) to absorb noise less than 4KHz.

2. The brake friction pad according to claim 1, characterized in that: The mass member (4) is provided on only one cantilever portion (3).

3. The brake friction pad according to claim 1, characterized in that: The mass member (4) is provided on all the cantilever parts (3), and the cantilever parts (3) have different lengths and widths.

4. The brake friction pad according to any one of claims 1 to 3, characterized in that: The weight of the mass member (4), the length, width and thickness of the cantilever portion (3) on which the mass member (4) is provided are set to satisfy the following formula: Wherein, fn represents the frequency that the brake friction pad (1) can eliminate, K represents the stiffness of the cantilever portion, I represents the moment of inertia, E represents the elastic modulus, L represents the length of the cantilever portion, b represents the width of the cantilever portion, h represents the thickness of the cantilever portion, and m represents the weight of the mass member.

5. The brake friction pad according to claim 4, characterized in that: The length of the cantilever portion (3) does not exceed the edge of the contour surface of the rim on which the brake friction pad (1) is assembled, and the width is greater than or equal to 1.2 times the thickness.

6. The brake friction pad according to claim 4, characterized in that: The weight of the mass member (4) is greater than or equal to 0.05 times the weight of the brake friction pad (1).

7. The brake friction pad according to claim 4, characterized in that: The weight of the mass member (4) is greater than the weight of the cantilever portion (3).

8. The brake friction pad according to any one of claims 1 to 3, characterized in that: The protruding end (38) of the cantilever portion (3) is provided with a through hole (382) for receiving the mass member (4).

9. The brake friction pad according to claim 8, characterized in that: The protruding end (38) of the cantilever portion (3) and the mass member (4) are connected by means of bolt connection, riveting, or a combination of riveting and gluing.

10. The brake friction pad according to any one of claims 1 to 3, characterized in that: An ear (5) is provided at the forming end of the cantilever portion (3) of the brake friction pad, the ear (5) being formed into a curved protruding shape, a gap (52) being formed between the ear (5) and the body (2), a gap being formed between the protruding end of the ear (5) and the adjacent side surface of the cantilever portion (3), and the gap (52) being used to allow a fixing member to pass through to fix the brake friction pad (1) to the brake caliper of a vehicle.

11. The brake friction pad according to any one of claims 1 to 3, characterized in that: The mass member has a cylindrical shape.

12. The brake friction pad according to any one of claims 1 to 3, characterized in that: The cantilever portion (3) itself is symmetrical relative to a center line along the extending direction of the cantilever portion (3).

13. The brake friction pad according to any one of claims 1 to 3, characterized in that: The width of the cantilever portion (3) is greater than or equal to 1.2 times the thickness of the body (2).

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