Brake pad of automobile braking system

Abstract

The brake pad of the automobile brake system comprises a plurality of storage holes formed in the brake pad, the storage holes are vertically formed from the surface, close to a brake disc, of the brake pad to the interior of the brake pad, and each storage hole sequentially comprises a circular truncated cone storage part, a cylindrical storage part and a conical storage part which are communicated with one another; the upper bottom surface of the circular truncated cone storage part is arranged on the surface, close to the brake disc, of the brake pad, and the two ends of the cylindrical storage part are communicated with the lower bottom surface of the circular truncated cone storage part and the bottom surface of the conical storage part respectively. The storage hole structure formed by compounding the circular truncated cone storage part, the cylindrical storage part and the conical storage part is arranged on the surface of the brake pad, so that the trapping and coagulation efficiency of brake wear particles is effectively improved, and the emission level of micron-scale and nano-scale particles is remarkably reduced; the particle containing and heat management performance of a friction interface in different braking stages is improved, and meanwhile the abrasion resistance and braking stability of the surface of the brake pad are enhanced.

Description

Technical Field

[0001] This invention relates to brake pads for an automotive braking system, belonging to the field of friction braking technology. Background Technology

[0002] In recent years, particulate matter emissions generated during vehicle braking due to friction and wear have received increasing attention. Under frequent braking conditions in urban areas, micron- and nano-sized particulate matter generated by braking systems has become a significant source of air pollution, posing a substantial threat to the environment and public health.

[0003] In disc braking systems, the friction and wear process between the brake disc and brake pads typically includes a break-in stage, a stable friction stage, and a limit wear stage. Each stage presents different requirements for friction control and particulate matter emissions. The properties of friction materials and their coupling effect with braking conditions are highly complex and difficult to predict accurately, directly impacting the reliability design of the system. Studies show that the wear rate increases significantly with increasing braking pressure, speed, and temperature. Simultaneously, frictional heat dissipates through conduction and convection at the contact surfaces, further influencing material behavior. A positive feedback relationship exists between the wear rate and particulate matter emission concentration, posing a significant challenge to particulate matter control.

[0004] To reduce particulate emissions during braking, existing technologies primarily employ groove structures on the surface of friction linings to promote debris removal, improve heat dissipation, and reduce particulate retention. However, these groove structures have limitations in shape design: most existing grooves use a single, regular geometric shape, making it difficult to fully adapt to the dynamic changes required at different wear stages during braking. Especially under high-temperature, high-pressure, or high-speed braking conditions, grooves with fixed shapes cannot effectively regulate the friction interface state, leading to unstable particulate emission control. Furthermore, existing groove shapes still fall short in balancing braking performance, wear resistance, and overall emission reduction performance, and their potential has not been fully realized. Summary of the Invention

[0005] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a brake pad for an automotive braking system. This invention effectively captures brake wear particles by creating storage holes with frustum, cylindrical, and conical storage sections on the brake pad, thus solving the problem of spatiotemporally differentiated particle emissions throughout the entire life cycle of the brake pad.

[0006] Technical solution: A brake pad for an automotive braking system includes a plurality of storage holes formed on the brake pad. The storage holes are formed vertically from the surface of the brake pad near the brake disc toward the interior of the brake pad. The storage holes sequentially include a frustum storage portion, a cylindrical storage portion, and a conical storage portion that are interconnected. The diameter of the upper base of the frustum storage portion is larger than the diameter of the lower base, and its upper base is formed on the surface of the brake pad near the brake disc. The two ends of the cylindrical storage portion are respectively connected to the lower base of the frustum storage portion and the bottom surface of the conical storage portion.

[0007] This invention effectively captures brake wear particles by creating storage holes with frustum, cylindrical, and conical storage sections on the brake pads, thereby reducing wear particle emissions and improving surface wear performance. This addresses the issue of spatiotemporally differentiated particle emissions throughout the brake pad's lifespan. When the brake disc and brake pad are engaged, friction generates tiny wear particles. These particles enter the storage holes on the brake pads as the brake disc rotates. Simultaneously, the friction generates high temperatures, causing the tiny wear particles to collide and coalesce into larger particles stored in the storage holes. This reduces the concentration of tiny particles emitted into the environment, suppresses non-exhaust gas emissions during braking, and reduces environmental pollution. Furthermore, the storage holes with frustum, cylindrical, and conical storage sections on the brake pad surface meet the functional requirements of three different friction and wear states during the brake pad's service life: the break-in stage, the stable friction stage, and the extreme wear stage. This adapts to the staged particle emission concentration requirements during the brake disc and brake pad engagement, allowing the brake pad surface to store an appropriate number of wear particles, achieving a synergistic optimization effect of suppressing wear particle emission concentration and reducing wear. The storage holes with frustum-shaped storage sections allow the brake pads and brake discs to collect a large amount of wear debris during the break-in phase throughout their entire lifespan, enabling the brake pads to quickly enter the next phase. During the stable friction phase, the storage holes with cylindrical storage sections can stably collect wear particles and provide stable friction performance for the brake pads. During the extreme wear phase, the storage holes with conical storage sections can still suppress particle emission concentration to a certain extent even when the brake pads are severely worn, and ensure braking force when the brake pads and brake discs are engaged. The overall optimization effect is more reasonable, thereby achieving a synergistic optimization effect of reducing the emission concentration of fine particles and reducing wear.

[0008] In a preferred embodiment, to optimize the internal spatial distribution of the storage holes and the particle holding capacity, the depth ratio of the frustum storage section, the cylindrical storage section, and the conical storage section is 1:3:1.

[0009] By setting the depth ratio of the frustum storage section, cylindrical storage section, and conical storage section to 1:3:1, more reasonable particle classification storage and thermal management are achieved, enhancing particle agglomeration effect.

[0010] Preferably, to ensure consistent particle collection behavior, the diameter of the upper bottom surface of the frustum-shaped storage portion of each storage hole is [not specified]. D 1 All are the same, the diameter of the cylindrical storage section D 2 All are the same, with the same bottom diameter of the conical storage section. D 3 All are the same, the vertical depth of each of the storage holes H All are the same; the storage holes on the brake pads are arranged in a rectangular array, with adjacent storage holes spaced at equal intervals.

[0011] By ensuring that all storage holes have the same size parameters and are distributed in a rectangular, equally spaced array, uniform capture and storage of wear particles at the braking interface can be achieved, thereby improving emission reduction stability.

[0012] Preferably, to accommodate the differences in temperature and pressure distribution at different radial positions of the brake disc, the diameter of the upper bottom surface of the frustum-shaped storage portion of each storage hole is [not specified]. D 1 All are the same, the diameter of the cylindrical storage section D 2 All are the same, with the same bottom diameter of the conical storage section. D 3 All are the same. The storage holes on the brake pad are arranged in a rectangular array, with equal spacing between adjacent storage holes. The depth of the storage holes gradually increases from the center of rotation of the brake disc outward along the radial direction of the brake pad. The depth difference between adjacent storage holes along the radial direction of the brake pad increases at an equal gradient, and the gradient value is equal to the ratio of the maximum depth difference between adjacent storage holes to the total number of depth differences.

[0013] By increasing the depth of the storage holes radially, a better match is achieved in terms of particle containment and heat dissipation capacity for local operating conditions, thereby improving overall emission reduction efficiency.

[0014] Preferably, to optimize the particle capture probability in high-wear areas, the diameter of the upper bottom surface of the frustum-shaped storage portion of each of the storage holes is [not specified]. D 1 All are the same, the diameter of the cylindrical storage section D 2 All are the same, with the same bottom diameter of the conical storage section. D 3 All are the same, the vertical depth of each of the storage holes H All are the same; the center distance between adjacent storage holes gradually decreases from the center of rotation of the brake disc outward along the radial direction of the brake pad, and the difference in center distance between adjacent storage holes along the radial direction of the brake pad increases gradually with an equal gradient, the gradient value being equal to the ratio of the maximum center distance difference between adjacent storage holes to the total number of center distance differences.

[0015] By making the center distance of the storage holes decrease radially, a denser particle collection layout is achieved in high-wear areas such as the outer edge of the brake disc, thereby enhancing the local emission reduction effect.

[0016] Preferably, in order to match the different radial particle generation characteristics during braking, the vertical depth of each of the storage holes is... H All are identical; the storage holes on the brake pads are arranged in a rectangular array, with adjacent storage holes spaced equally apart; the diameter of the upper bottom surface of the frustum-shaped storage portion of the storage hole is... D 1 Diameter of cylindrical storage section D 2 Diameter of the bottom surface of the conical storage section D 3 The diameter of each storage hole increases gradually outward from the center of rotation of the brake disc along the radial direction of the brake pad. The diameter difference between adjacent storage holes along the radial direction of the brake pad increases at an equal gradient. The gradient value is equal to the ratio of the maximum diameter difference between adjacent storage holes to the total number of diameter differences.

[0017] By making the diameter of each part of the storage hole decrease radially, more precise particle classification and storage space allocation can be achieved, thereby improving the utilization efficiency of the hole structure.

[0018] Preferably, in order to increase the particle capture capacity per unit area, the diameter of the upper bottom surface of the frustum-shaped storage portion of each of the storage holes is [not specified]. D 1 All are the same, the diameter of the cylindrical storage section D 2 All are the same, with the same bottom diameter of the conical storage section. D 3 All are the same, the vertical depth of each of the storage holes H All are the same; the storage holes on the brake pads are arranged in a honeycomb array, with adjacent storage holes spaced at equal intervals.

[0019] By arranging the storage holes in a honeycomb array, higher space utilization and more uniform interface contact pressure distribution are achieved, enhancing overall emission reduction and wear resistance.

[0020] Preferably, in order to maximize particle storage capacity while ensuring structural strength, the diameter of the upper bottom surface of the frustum-shaped storage section of the storage hole is... D 1 The diameter of the cylindrical storage section ranges from 200 to 600 μm. D 2 The diameter of the bottom surface of the conical storage section ranges from 100 to 500 μm. D 3 The vertical depth of the storage hole ranges from 100-500 μm. H The thickness of each storage hole is equal to 1 / 3 to 2 / 3 of the total thickness of the brake pad, and the center distance between adjacent storage holes is 500-2000μm.

[0021] By limiting the critical size range and depth ratio of the storage pores, efficient particle agglomeration, storage, and thermal management can be coordinated to ensure the engineering feasibility of emission reduction effects.

[0022] Beneficial effects: This invention, by setting a storage hole structure on the surface of the brake pad composed of a frustum storage section, a cylindrical storage section, and a conical storage section, effectively improves the collection and coagulation efficiency of brake wear particles, significantly reducing the emission levels of micron- and nano-sized particles; it improves the particle containment and thermal management performance of the friction interface at different braking stages—run-in, stable friction, and ultimate wear stages—while enhancing the wear resistance and braking stability of the brake pad surface; it effectively adapts to the differentiated emission reduction requirements under dynamic changes in braking pressure, speed, and temperature, solving the problem that existing single-shaped groove structures cannot respond to changes in operating conditions and have unstable emission reduction effects; and it can meet the engineering application requirements of high reliability, full life cycle particulate emission reduction, and synergistic optimization of braking performance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a surface view of the brake pad with storage holes according to the present invention; Figure 2 This is a cross-sectional view (AA) of the present invention; Figure 3 This is a BB cross-sectional view of the storage hole of the present invention with varying depth along the radial direction; Figure 4 This is a CC view of the storage hole of the present invention with a radially variable center distance; Figure 5 This is a partial view of the storage hole of the present invention with a radially variable diameter; Figure 6 This is a surface view of the brake pad with the storage hole honeycomb array of the present invention; Figure 7 This is a schematic diagram of the entire wear process of the brake pads according to the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] like Figure 1 As shown, a brake pad for an automotive braking system includes a plurality of storage holes 1 formed on the brake pad. The storage holes 1 are formed vertically from the surface of the brake pad near the brake disc into the brake pad. The storage holes 1 sequentially include a frustum storage portion 11, a cylindrical storage portion 12, and a conical storage portion 13 that are interconnected. The diameter of the upper bottom surface of the frustum storage portion 11 is larger than the diameter of the lower bottom surface, and its upper bottom surface is formed on the surface of the brake pad near the brake disc. The two ends of the cylindrical storage portion 12 are respectively connected to the lower bottom surface of the frustum storage portion 11 and the bottom surface of the conical storage portion 13.

[0029] By creating storage holes 1 on the brake pads, which have frustum-shaped storage sections 11, cylindrical storage sections 12, and conical storage sections 13, brake wear particles are effectively captured, thereby reducing wear particle emissions and improving surface wear performance. This addresses the issue of spatiotemporally differentiated particle emissions throughout the brake pad's lifespan. When the brake disc and brake pads are engaged, friction generates tiny wear particles. As the brake disc rotates, these particles enter the storage holes 1 on the brake pads. Simultaneously, friction generates high temperatures, causing the tiny wear particles to collide and coalesce into larger particles stored in the storage holes 1. This reduces the concentration of tiny particles emitted into the environment, suppresses non-exhaust gas emission particles during braking, and reduces environmental pollution. Meanwhile, the storage holes 1 on the surface of the brake pads, comprising a frustum storage section 11, a cylindrical storage section 12, and a conical storage section 13, meet the functional requirements of three different friction and wear states during the service life of the brake pads: the break-in stage, the stable friction stage, and the extreme wear stage. This adapts to the staged requirements of particle emission concentration during the interaction between the brake disc and the brake pad, allowing the brake pad surface to store an appropriate amount of wear particles, achieving a synergistic optimization effect of suppressing wear particle emission concentration and reducing wear. The storage holes 1 with the frustum storage section 11 enable the brake pads and brake disc to collect a large amount of wear debris during the break-in stage, allowing the brake pads to quickly enter the next stage. During the stable friction stage, the storage holes 1 with the cylindrical storage section 12 can stably collect wear particles and provide stable friction performance for the brake pads. During the extreme wear stage, the storage holes 1 with the conical storage section 13 can still suppress particle emission concentration to a certain extent even when the brake pads are severely worn, ensuring braking force when the brake pads and brake discs are in contact. The overall optimization effect is more reasonable, thus achieving a synergistic optimization effect of reducing the emission concentration of fine particles and reducing wear.

[0030] In order to optimize the internal space distribution and particle holding capacity of the storage hole 1, the depth ratio of the frustum storage section 11, the cylindrical storage section 12, and the conical storage section 13 is 1:3:1.

[0031] By setting the depth ratio of the frustum storage section 11, the cylindrical storage section 12, and the conical storage section 13 to 1:3:1, this staged storage hole depth structure ratio design can effectively collect wear particles with different particle size characteristics generated at different wear stages, achieve more reasonable particle classification storage and thermal management, and enhance particle coagulation effect.

[0032] like Figure 2 As shown, to ensure consistent particle collection behavior, the diameter of the upper bottom surface of the frustum-shaped storage portion 11 of each storage hole 1 is... D 1 All have the same diameter of 500 μm for the cylindrical storage section 12. D 2All have the same diameter of 300 μm at the bottom of the conical storage section 13. D 3 All are the same, with a vertical depth of 300 μm for each of the storage holes 1. H All of them are made of 2 / 3 of the wear material. The storage holes 1 on the brake pad are arranged in a rectangular array, with adjacent storage holes 1 being equally spaced and the center distance being 2000μm.

[0033] By ensuring that all storage holes 1 have the same size parameters and are distributed in a rectangular array with equal spacing, uniform capture and storage of wear particles at the braking interface can be achieved, thereby improving emission reduction stability.

[0034] like Figure 3 As shown, Example 1: Storage hole with varying depth along the radial direction. To accommodate the differences in temperature and pressure distribution at different radial positions of the brake disc, the upper bottom surface diameter of the frustum-shaped storage portion 11 of each of the storage holes 1 is [not specified]. D 1 All have the same diameter of 600 μm for the cylindrical storage section 12. D 2 All have the same diameter of 400 μm at the bottom of the conical storage section 13. D 3 All are 400μm. The storage holes 1 on the brake pad are arranged in a rectangular array, with adjacent storage holes 1 being equally spaced and the center distance being 1000μm. The depth of the storage holes 1 gradually increases from the center of rotation of the brake disc outward along the radial direction of the brake pad. The depth difference between adjacent storage holes 1 along the radial direction of the brake pad increases at an equal gradient (in the form of an arithmetic sequence). The gradient value is equal to the ratio of the maximum depth difference between adjacent storage holes 1 to the total number of depth differences.

[0035] By increasing the depth of storage hole 1 radially, a better match is achieved in terms of particle containment and heat dissipation capacity for local operating conditions, thereby improving overall emission reduction efficiency. The maximum depth of the storage hole... H max Minimum depth equal to 2 / 3 of the total thickness of the brake pad H min This is equal to 1 / 3 of the total thickness of the brake pad. Taking a brake pad with a total thickness of 1.5cm as an example, the vertical depth of each storage hole... H The range is 0.5cm-1cm.

[0036] like Figure 4 As shown in Example 2: The storage hole has a variable center distance along the radial direction. To optimize the particle capture probability in high-wear areas, the diameter of the upper bottom surface of the frustum-shaped storage portion 11 of each storage hole 1 is [not specified]. D 1 All have the same diameter of 600 μm for the cylindrical storage section 12. D 2All have the same diameter of 300 μm at the bottom of the conical storage section 13. D 3 All are the same, with a vertical depth of 300 μm for each of the storage holes 1. H All are the same, being 2 / 3 of the wear material; the center distance between adjacent storage holes 1 gradually decreases from the center of rotation of the brake disc outward along the radial direction of the brake pad, and the center distance difference between adjacent storage holes 1 along the radial direction of the brake pad increases gradually at an equal gradient, the gradient value being equal to the ratio of the maximum center distance difference between adjacent storage holes 1 to the total number of center distance differences.

[0037] By gradually decreasing the center distance of the storage holes 1 along a radial gradient, a denser particle collection layout is achieved in the high-wear area at the outer edge of the brake disc, enhancing the local emission reduction effect. The maximum center distance of the storage holes... L max Equal to 2000μm, minimum center distance L min It equals 500μm.

[0038] like Figure 5 As shown, Example 3: The storage hole has a radially variable diameter. To match the different radial particle generation characteristics during braking, the vertical depth of each of the storage holes 1 is... H All are made of the same 2 / 3 of wear material. The storage holes 1 on the brake pad are arranged in a rectangular array, with adjacent storage holes 1 equally spaced and a center distance of 1000 μm; the diameter of the bottom surface of the frustum storage part 11 of the storage hole 1 is... D 1 The minimum diameter is D 1min 200μm, maximum diameter D 1max The diameter of the cylindrical storage section is 12 μm, with a diameter of 600 μm. D 2 minimum diameter D 2min 100μm, maximum diameter D 2max The diameter of the bottom surface of the conical storage section 13 is 500 μm. D 3 The minimum diameter is D 3min 100μm, maximum diameter D 3max The diameter is 500μm, and it gradually increases outward from the center of rotation of the brake disc along the radial direction of the brake pad. The diameter difference between adjacent storage holes 1 along the radial direction of the brake pad increases at an equal gradient. The gradient value is equal to the ratio of the maximum diameter difference between adjacent storage holes 1 to the total number of diameter differences.

[0039] By making the diameter of each part of the storage hole 1 decrease radially, more precise particle classification and storage space allocation are achieved, thereby improving the utilization efficiency of the hole structure.

[0040] like Figure 6 As shown, Example 4: Variable Arrangement of Storage Holes To increase the particle capture capacity per unit area, the diameter of the upper bottom surface of the frustum-shaped storage portion 11 of each storage hole 1 is... D 1 All have the same diameter of 600 μm for the cylindrical storage section 12. D 2 All have the same diameter of 400 μm at the bottom of the conical storage section 13. D 3 All are the same, with a vertical depth of 400 μm for each of the storage holes 1. H All of them are made of 2 / 3 of the wear material. The storage holes 1 on the brake pad are arranged in a honeycomb array, with adjacent storage holes 1 being equally spaced and the center distance being 500μm.

[0041] By arranging the storage holes 1 in a honeycomb array, higher space utilization and more uniform interface contact pressure distribution are achieved, enhancing overall emission reduction and wear resistance.

[0042] To maximize particle storage capacity while ensuring structural strength, the diameter of the upper bottom surface of the frustum-shaped storage section 11 of the storage hole 1 is... D 1 The diameter of the cylindrical storage section 12 ranges from 200 to 600 μm. D 2 The diameter of the bottom surface of the conical storage section 13 is in the range of 100-500 μm. D 3 The vertical depth of the storage hole 1 is in the range of 100-500 μm. H The thickness of each component is equal to 1 / 3 to 2 / 3 of the total thickness of the brake pads, and the center distance between adjacent storage holes 1 is... L The range is 500-2000μm.

[0043] By limiting the key size range and depth ratio of storage hole 1, the synergy of efficient particle agglomeration, storage and thermal management is achieved, ensuring the engineering feasibility of emission reduction effect.

[0044] like Figure 7The diagram illustrates different service stages throughout the lifecycle of a brake pad, including the break-in stage, the stable wear stage, and the ultimate wear stage. The corresponding storage hole features are a frustum-shaped storage section 11, a cylindrical storage section 12, and a conical storage section 13. In one illustrative embodiment, the depth ratio of the three sections is set to 1:3:1, with a total depth of 6000 μm. This staged storage hole structure design effectively collects wear particles with different particle sizes generated at different wear stages, achieving an optimized effect of reducing particle emissions.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brake pad for an automotive braking system, characterized in that: The device includes several storage holes (1) on the brake pad. The storage holes (1) are opened vertically from the surface of the brake pad near the brake disc into the brake pad. The storage holes (1) include a frustum storage part (11), a cylindrical storage part (12), and a conical storage part (13) that are connected to each other. The diameter of the upper bottom surface of the frustum storage part (11) is larger than the diameter of the lower bottom surface. Its upper bottom surface is opened on the surface of the brake pad near the brake disc. The two ends of the cylindrical storage part (12) are connected to the lower bottom surface of the frustum storage part (11) and the bottom surface of the conical storage part (13), respectively.

2. The brake pads of the automotive braking system according to claim 1, characterized in that: The depth ratio of the frustum storage section (11), the cylindrical storage section (12), and the conical storage section (13) is 1:3:

1.

3. The brake pads of the automotive braking system according to claim 2, characterized in that: The diameter of the upper bottom surface of the frustum-shaped storage portion (11) of each of the storage holes (1) D 1 All are the same, the diameter of the cylindrical storage section (12) is the same D 2 All are the same, the bottom diameter of the conical storage section (13) D 3 All are the same, the vertical depth of each of the storage holes (1) is the same. H All are the same, the storage holes (1) on the brake pad are arranged in a rectangular array, and adjacent storage holes (1) are equally spaced.

4. The brake pads of the automotive braking system according to claim 2, characterized in that: The diameter of the upper bottom surface of the frustum-shaped storage portion (11) of each of the storage holes (1) D 1 All are the same, the diameter of the cylindrical storage section (12) is the same D 2 All are the same, the bottom diameter of the conical storage section (13) D 3 All are the same. The storage holes (1) on the brake pad are arranged in a rectangular array, and the adjacent storage holes (1) are equally spaced. The depth of the storage holes (1) gradually increases from the center of rotation of the brake disc along the radial direction of the brake pad. The depth difference between adjacent storage holes (1) along the radial direction of the brake pad increases at an equal gradient. The gradient value is equal to the ratio of the maximum depth difference between adjacent storage holes (1) to the total number of depth differences.

5. The brake pads of the automotive braking system according to claim 2, characterized in that: The diameter of the upper bottom surface of the frustum-shaped storage portion (11) of each of the storage holes (1) D 1 All are the same, the diameter of the cylindrical storage section (12) is the same D 2 All are the same, the bottom diameter of the conical storage section (13) D 3 All are the same, the vertical depth of each of the storage holes (1) is the same. H All are the same; the center distance between adjacent storage holes (1) gradually decreases from the center of rotation of the brake disc outward along the radial direction of the brake pad, and the center distance difference between adjacent storage holes (1) along the radial direction of the brake pad increases gradually with equal gradient, and the gradient value is equal to the ratio of the maximum center distance difference between adjacent storage holes (1) to the total number of center distance differences.

6. The brake pads of the automotive braking system according to claim 2, characterized in that: Vertical depth of each of the storage holes (1) H All are identical; the storage holes (1) on the brake pads are arranged in a rectangular array, with adjacent storage holes (1) spaced equally apart; the diameter of the bottom surface of the frustum storage portion (11) of the storage hole (1) is... D 1 , cylindrical storage section (12) diameter D 2 , Conical storage section (13) bottom diameter D 3 The diameter of the adjacent storage holes (1) along the radial direction of the brake pad gradually increases from the center of rotation of the brake disc. The diameter difference of the adjacent storage holes (1) along the radial direction of the brake pad increases at an equal gradient. The gradient value is equal to the ratio of the maximum diameter difference of the adjacent storage holes (1) to the total number of diameter differences.

7. The brake pads of the automotive braking system according to claim 2, characterized in that: The diameter of the upper bottom surface of the frustum-shaped storage portion (11) of each of the storage holes (1) D 1 All are the same, the diameter of the cylindrical storage section (12) is the same D 2 All are the same, the bottom diameter of the conical storage section (13) D 3 All are the same, the vertical depth of each of the storage holes (1) is the same. H All are the same, the storage holes (1) on the brake pad are arranged in a honeycomb array, and adjacent storage holes (1) are equally spaced.

8. The brake pads of the automotive braking system according to any one of claims 3-7, characterized in that: The diameter of the upper bottom surface of the frustum-shaped storage section (11) of the storage hole (1) D 1 The diameter of the cylindrical storage section (12) ranges from 200 to 600 μm. D 2 The diameter of the bottom surface of the conical storage section (13) ranges from 100 to 500 μm. D 3 The vertical depth of the storage hole (1) ranges from 100-500 μm. H The center distance between adjacent storage holes (1) is equal to 1 / 3 to 2 / 3 of the total thickness of the brake pads. L The range is 500-2000μm.

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