A shock resistant brake pad device provided with a buffer layer

Abstract

The utility model provides an anti -impact brake pad device with buffer layer belongs to anti -impact brake pad device technical field, this anti -impact brake pad device with buffer layer includes brake base plate, buffer layer, friction layer and fixed part, brake base plate is plate -like structure, the first surface of brake base plate is used for with brake system's mounting surface fixed connection, the second surface of brake base plate is opposite with first surface setup, buffer layer sets up on the second surface of brake base plate, buffer layer is made of elastic material, friction layer sets up in buffer layer away from one side of brake base plate, the working surface of friction layer is used for with brake disc contact and produces friction force, can solve the technical problem of brake pad in prior art when bearing braking impact lacks effective buffer structure and leads to impact force direct action on brake pad base plate and friction layer, causes brake pad structural member fatigue damage acceleration, friction layer uneven wear.

Description

Technical Field

[0001] This utility model belongs to the technical field of impact-resistant brake pad devices, specifically, it relates to an impact-resistant brake pad device with a buffer layer. Background Technology

[0002] Brake pads are a critical safety component in automotive braking systems. They generate braking torque through friction with the brake disc to decelerate or stop the vehicle. In actual use, brake pads frequently withstand impact loads transmitted from the brake disc, especially during emergency braking, high-speed braking, or braking on bumpy roads. The instantaneous impact force can be several times or even tens of times the normal braking force. Current brake pad technology typically uses a structure where the friction material is directly bonded or mechanically fixed to a metal backing plate. This rigid connection method lacks an effective buffering mechanism, causing impact energy to be directly transmitted to the interface between the backing plate and the friction material. Long-term use can lead to problems such as adhesive layer delamination, friction material cracking, or backing plate deformation. Furthermore, the rigid contact between the friction layer of existing brake pads and the brake disc also generates significant vibration and noise. The reduced driving comfort has led to various issues. Existing technologies primarily address these problems by increasing backing plate thickness to improve rigidity, refining friction material formulations to enhance strength, and adding fiber reinforcement to friction materials. However, these methods either increase the weight and cost of brake pads or have limited effectiveness, failing to fundamentally solve the problem of impact loads damaging the brake pad structure. Some technical solutions attempt to add adhesive or transition layers between the backing plate and the friction material, but these layers mainly serve an adhesive function, and their thickness and elastic modulus cannot provide sufficient cushioning. With the continuous improvement of vehicle performance and the increasing complexity of operating conditions, higher demands are placed on the impact resistance and service life of brake pads, urgently requiring the development of a new type of brake pad device that can effectively alleviate impact loads and improve structural reliability. Utility Model Content

[0003] In view of this, the present invention provides an impact-resistant brake pad device with a buffer layer, which can solve the technical problem in the prior art that the lack of an effective buffer structure when the brake pad is subjected to braking impact causes the impact force to act directly on the brake pad base plate and friction layer, resulting in accelerated fatigue damage of brake pad structural components, uneven wear of the friction layer, and excessive braking noise and vibration, which seriously affects the service life and braking performance stability of the braking system.

[0004] This utility model is implemented as follows:

[0005] This utility model provides an impact-resistant brake pad device with a buffer layer, including a brake base plate, a buffer layer, a friction layer, and a fixing member. The brake base plate has a plate-like structure. The first surface of the brake base plate is used for fixed connection with the mounting surface of the brake system. The second surface of the brake base plate is disposed opposite to the first surface. The buffer layer is disposed on the second surface of the brake base plate and is made of an elastic material. The friction layer is disposed on the side of the buffer layer away from the brake base plate. The working surface of the friction layer is used to contact the brake disc to generate friction. The fixing member passes through the friction layer, the buffer layer, and the brake base plate to fasten the friction layer, the buffer layer, and the brake base plate together.

[0006] The technical effects of the impact-resistant brake pad device with a buffer layer provided by this utility model are as follows: By setting a buffer layer between the brake base plate and the friction layer, when the brake pad contacts the brake disc, the buffer layer can absorb the impact energy and disperse the stress, avoiding the impact force from being directly transmitted to the brake base plate and causing structural damage. At the same time, the elastic deformation characteristics of the buffer layer make the contact between the friction layer and the brake disc more uniform and stable, improving the service life and braking performance of the brake pad. The fasteners secure each layer of the structure together to ensure that the components will not undergo relative displacement when the device is subjected to impact load, thus ensuring the stability and reliability of the overall structure.

[0007] Based on the above technical solution, the impact-resistant brake pad device with a buffer layer of this utility model can be further improved as follows:

[0008] The thickness of the buffer layer gradually decreases from the geometric center of the brake substrate towards the edge.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the design of the buffer layer thickness gradually decreasing from the geometric center of the brake pad to the edge makes the central area have stronger buffering capacity to cope with the concentrated impact force during braking, while the reduced thickness in the edge area reduces the overall mass and improves heat dissipation performance. This thickness gradient distribution makes the deformation characteristics of the buffer layer match the pressure distribution of the brake disc, effectively improving the impact resistance while optimizing the dynamic response characteristics of the brake pads and reducing vibration and noise during braking.

[0010] Furthermore, the buffer layer has multiple grooves on the surface that contacts the brake base plate. The grooves are radially distributed, and the depth of the grooves is 1 / 3 to 1 / 2 of the thickness of the buffer layer.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the radial grooves on the contact surface between the buffer layer and the brake base plate increase the flexibility of the contact interface. The presence of the grooves allows the buffer layer to deform locally into the groove space when under pressure, thereby improving the overall deformation capacity and energy absorption efficiency of the buffer layer. The radially distributed groove structure also forms multiple independent support areas. When a certain area is subjected to concentrated impact, it will not affect the buffering performance of other areas. The groove depth is controlled at 1 / 3 to 1 / 2 of the thickness of the buffer layer, which ensures sufficient deformation space and maintains the overall strength of the buffer layer.

[0012] Furthermore, the working surface of the friction layer is provided with a plurality of arc-shaped protrusions, which are arranged along the radial direction of the friction layer, and a heat-conducting groove is formed between two adjacent arc-shaped protrusions.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the arc-shaped protrusions on the working surface of the friction layer increase the actual contact area with the brake disc, the arc structure makes the contact stress distribution more uniform, avoids uneven wear of the friction layer caused by local stress concentration, the heat conduction grooves formed between adjacent arc-shaped protrusions provide a channel for the heat generated during braking to dissipate, effectively reducing the working temperature of the friction layer and preventing thermal fade caused by overheating, and the radial arrangement of the arc-shaped protrusions matches the rotation direction of the brake disc, improving the smoothness of the braking process and friction efficiency.

[0014] Furthermore, the edge portion of the brake substrate is bent away from the buffer layer to form a reinforcing rib, and the reinforcing rib forms an angle of 80~100° with the first surface of the brake substrate.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the reinforcing ribs formed by bending the edge of the brake base plate away from the buffer layer significantly improve the bending stiffness and overall strength of the brake base plate. The angle between the reinforcing ribs and the first surface of the brake base plate is controlled at 80~100°, so that the reinforcing ribs can effectively resist bending deformation without reducing the reinforcing effect due to the angle being too small. This edge reinforcement structure prevents the brake base plate from warping or deforming when subjected to impact loads, ensuring the bonding stability between the brake base plate and the mounting surface. At the same time, the reinforcing ribs also play a limiting role to prevent the buffer layer and friction layer from shifting laterally.

[0016] Furthermore, the area of ​​the surface of the buffer layer that contacts the brake base plate is larger than the area of ​​the surface of the friction layer that contacts the buffer layer, and the edge of the buffer layer extends beyond the edge of the friction layer to form a protective edge.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the design that the contact surface area between the buffer layer and the brake base plate is larger than that between the friction layer and the buffer layer allows the impact force to be transmitted to the brake base plate through a larger contact area, reducing the stress level per unit area. The protective edge formed by the edge of the buffer layer extending beyond the friction layer plays a role in wrapping and protecting the edge of the friction layer, preventing the friction layer from cracking or peeling due to edge stress concentration during use. The protective edge can also block external impurities and moisture from penetrating the interface between the friction layer and the buffer layer, improving the durability of the bonding strength and the durability of the device.

[0018] Furthermore, the fixing member is a bolt structure, the brake base plate has a first through hole, the buffer layer has a second through hole, and the friction layer has a third through hole. The first through hole, the second through hole, and the third through hole are coaxially arranged in a direction perpendicular to the first surface of the brake base plate.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: using bolts as fasteners and opening coaxial through holes in the brake base plate, buffer layer and friction layer respectively, the fasteners can pass vertically through each layer of structure to achieve precise positioning and reliable fastening. The coaxial through holes ensure the alignment accuracy between each layer and avoid stress unevenness caused by installation deviation. The bolt fastening method facilitates assembly, maintenance and replacement. The setting of through holes will not significantly affect the buffering performance of the buffer layer. At the same time, the axial preload of the fasteners enables each layer of structure to form a stable composite system to jointly bear the braking impact load.

[0020] Furthermore, the buffer layer is made of rubber or polyurethane material.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The buffer layer is made of rubber or polyurethane material. These two elastic materials have excellent shock absorption and damping performance and fatigue resistance. Rubber material has good elastic modulus and damping characteristics, which can effectively absorb impact energy and convert mechanical vibration into heat energy dissipation. Polyurethane material has both high strength and high elasticity, which can maintain good resilience performance over a large strain range. The temperature resistance of these two materials meets the working temperature requirements of the braking system, and at the same time, they have good wear resistance and anti-aging properties to ensure the long-term stability of the buffer layer.

[0022] Furthermore, the friction layer is made of ceramic matrix composite material or semi-metallic friction material.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the friction layer is made of ceramic matrix composite material or semi-metallic friction material. Ceramic matrix composite material has the characteristics of good high temperature stability, stable friction coefficient and strong wear resistance, and can maintain stable braking performance under high temperature and high pressure conditions. Semi-metallic friction material has both good thermal conductivity and mechanical strength. When these two materials are used in conjunction with the brake disc, they can generate stable friction torque and have a low wear rate, which extends the replacement cycle of brake pads. The selection of materials and the design of the buffer layer achieve an optimized balance between braking performance and impact resistance.

[0024] Furthermore, the brake base plate is made of steel plate, and the thickness of the brake base plate is 2 to 3 times the maximum thickness of the buffer layer.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the brake base plate is made of steel plate, which provides sufficient mechanical strength and rigidity as the load-bearing foundation of the entire device. The ratio of the brake base plate thickness to 2 to 3 times the maximum thickness of the buffer layer ensures that the base plate will not deform excessively when subjected to braking force and impact force, and also avoids the increase in weight caused by excessive base plate thickness. This thickness ratio makes the brake base plate and the buffer layer achieve the best state in terms of rigidity and flexibility matching. The rigid support of the brake base plate and the flexible buffering effect of the buffer layer complement each other, jointly improving the overall impact resistance and reliability of the device.

[0026] Compared with existing technologies, the beneficial effects of the impact-resistant brake pad device with a buffer layer provided by this utility model are as follows: This utility model forms a three-layer composite structure system of brake base plate-buffer layer-friction layer by setting a buffer layer with a specific structure between the brake base plate and the friction layer. This effectively solves the problem of insufficient impact resistance of existing brake pads. The elastic deformation characteristics of the buffer layer can absorb and disperse the instantaneous impact energy generated during braking, avoid the concentration of impact stress at the interface between the brake base plate and the friction layer, significantly reduce the accumulation rate of fatigue damage of structural components, and extend the overall service life of the brake pad. At the same time, the presence of the buffer layer makes the contact between the friction layer and the brake disc... The braking is smoother and more uniform, reducing vibration and noise caused by rigid contact, and improving the smoothness and comfort of the braking process. By optimizing the thickness distribution of the buffer layer, the surface groove structure, and the size matching relationship with other components, the best balance between buffer performance and structural strength is achieved. This utility model also improves the heat dissipation capacity and overall rigidity of the device by setting arc-shaped protrusions and heat conduction grooves on the surface of the friction layer and setting reinforcing ribs on the edge of the brake base plate. This allows the brake pads to maintain stable performance under high-intensity braking conditions. The overall technical solution is simple and practical, easy to process and manufacture, and has limited cost increase. It has good engineering application value and market promotion prospects. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an impact-resistant brake pad device with a buffer layer.

[0029] Figure 2 This is a schematic diagram of the surface where the buffer layer contacts the brake base plate.

[0030] Figure 3 This is a schematic diagram of the working surface of the friction layer;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Brake base plate; 2. Buffer layer; 3. Friction layer; 4. Fixing component. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The diagram shows a schematic of an impact-resistant brake pad device with a buffer layer provided by this utility model. The device includes a brake base plate 1, a buffer layer 2, a friction layer 3, and a fixing member 4. The brake base plate has a plate-like structure. The first surface of the brake base plate is used to fix and connect with the mounting surface of the brake system. The second surface of the brake base plate is disposed opposite to the first surface. The buffer layer is disposed on the second surface of the brake base plate and is made of an elastic material. The friction layer is disposed on the side of the buffer layer away from the brake base plate. The working surface of the friction layer is used to contact the brake disc to generate friction. The fixing member passes through the friction layer, the buffer layer, and the brake base plate and is used to fasten the friction layer, the buffer layer, and the brake base plate together.

[0035] In the above technical solution, the thickness of the buffer layer gradually decreases from the geometric center of the brake substrate towards the edge.

[0036] Furthermore, in the above technical solution, the buffer layer has multiple grooves on the surface that contacts the brake substrate. The grooves are radially distributed, and the depth of the grooves is 1 / 3 to 1 / 2 of the thickness of the buffer layer.

[0037] Furthermore, in the above technical solution, the working surface of the friction layer is provided with multiple arc-shaped protrusions, which are arranged along the radial direction of the friction layer, and a heat-conducting groove is formed between two adjacent arc-shaped protrusions.

[0038] Furthermore, in the above technical solution, the edge portion of the brake substrate is bent away from the buffer layer to form a reinforcing rib, and the reinforcing rib and the first surface of the brake substrate form an angle of 80~100°.

[0039] Furthermore, in the above technical solution, the area of ​​the surface in contact with the brake substrate of the buffer layer is larger than the area of ​​the surface in contact with the friction layer of the buffer layer, and the edge of the buffer layer extends beyond the edge of the friction layer to form a protective edge.

[0040] Furthermore, in the above technical solution, the fastener is a bolt structure, a first through hole is provided on the brake base plate, a second through hole is provided on the buffer layer, and a third through hole is provided on the friction layer. The first through hole, the second through hole and the third through hole are coaxially arranged in a direction perpendicular to the first surface of the brake base plate.

[0041] Furthermore, in the above technical solution, the buffer layer is made of rubber or polyurethane material.

[0042] Furthermore, in the above technical solution, the friction layer is made of ceramic matrix composite material or semi-metallic friction material.

[0043] Furthermore, in the above technical solution, the brake base plate is a steel plate, and the thickness of the brake base plate is 2 to 3 times the maximum thickness of the buffer layer.

[0044] The following is a specific embodiment 1 of this utility model: The impact-resistant brake pad device with a buffer layer provided in this embodiment is applied to the front wheel braking system of a mid-sized car. The brake base plate is made of high-quality carbon structural steel plate with a thickness of 5mm and the steel plate grade is Q235. The brake base plate has a rectangular plate structure with a length of 150mm and a width of 80mm. The first surface of the brake base plate is sandblasted to increase the friction with the mounting surface. The four edges of the brake base plate are bent at 90 degrees away from the buffer layer to form a reinforcing rib with a height of 8mm. The angle between the reinforcing rib and the first surface is 90 degrees. The buffer layer is made of Shore hardness material. The A70 is made of nitrile rubber. The buffer layer has the same rectangular shape as the brake base plate, but is slightly larger, with a length of 155mm and a width of 85mm. The thickness of the buffer layer at the geometric center of the brake base plate is 4mm, decreasing linearly from the center to the edge, down to 2mm at the edge. Eight radial grooves are formed on the bottom surface of the buffer layer, the surface in contact with the brake base plate. The grooves are evenly distributed radially outward from the center of the buffer layer. Each groove is 3mm wide and 1.5mm deep, approximately one-third the thickness of the buffer layer at the center. The bottom of the grooves is arc-shaped. The friction layer is made of a ceramic-based composite friction material, which consists of alumina ceramic fibers. The friction layer is formed by sintering a mixture of carbon fiber, copper powder, graphite, and phenolic resin in a mass ratio of 3:2:1:2. The friction layer is rectangular, 145mm long, 75mm wide, and 12mm thick. The friction layer is smaller than the buffer layer, causing the buffer layer's edge to extend beyond the friction layer, forming a 5mm wide protective edge. The working surface of the friction layer has six arc-shaped protrusions, each extending along the length of the friction layer. Each protrusion has a semi-circular cross-section with a radius of 2mm. The spacing between adjacent protrusions is 20mm, forming a heat-conducting groove. Four M8 socket head cap screws are used for fixing, located at the four corners of the brake base plate, at various distances from the edge. At a position of 20mm, the through holes on the brake base plate, buffer layer, and friction layer are all 9mm in diameter. During assembly, first place the buffer layer on the second surface of the brake base plate and align the through holes. Then place the friction layer on the buffer layer and align the through holes as well. Finally, pass the bolts through the three-layer structure from the friction layer side and engage with the mounting nuts on the back of the brake base plate. Tighten the four bolts gradually to a torque of 18 Nm in a diagonal sequence. When the vehicle is in use and performs emergency braking at a speed of 60kN, the impact force generated at the moment of contact between the brake disc and the friction layer is approximately 8000N. This impact force acts on the surface of the friction layer, while the buffer layer below the friction layer experiences approximately 0.With an elastic compression of 8mm, approximately 40% of the peak impact force is absorbed by the buffer layer, significantly reducing the impact stress transmitted to the brake base plate. The radial groove structure of the buffer layer ensures more uniform pressure distribution, preventing stress concentration. The arc-shaped protrusions on the friction layer surface increase the actual contact area by approximately 25%, correspondingly reducing the pressure per unit area. Simultaneously, the heat-conducting grooves provide a dissipation channel for the heat generated by friction, keeping the friction layer's operating temperature within a reasonable range. After continuous braking testing, the device can withstand over 10,000 braking cycles without permanent deformation of the buffer layer, cracking of the friction layer, or fatigue damage to the brake base plate, demonstrating the effectiveness and reliability of the impact-resistant design of this invention.

[0045] The following is another specific embodiment 2 of this utility model: This embodiment 2 is based on embodiment 1, but the material of the buffer layer is changed to a polyurethane elastomer material with a Shore A hardness of 85. Compared with nitrile rubber, it has higher strength and resilience. The thickness distribution of the polyurethane buffer layer is kept the same as in embodiment 1, i.e., 4mm at the center and 2mm at the edge, but the groove depth is increased to 2mm, which is about half of the center thickness, so as to give full play to the deformation capacity of the polyurethane material. At the same time, the friction layer material is changed to a semi-metallic friction material, which is made by mixing and pressing steel fiber, iron powder, graphite and organic binder in a mass ratio of 4:3:2:3. The semi-metallic friction material has better thermal conductivity and high temperature stability, and is suitable for heavy load or high-speed braking conditions. The thickness of the brake base plate is increased to 6mm to match the maximum thickness of the polyurethane buffer layer of 4mm, maintaining a thickness ratio of 1.5 times to meet the rigidity-flexibility matching requirements. This embodiment is suitable for the braking system of medium and large SUV models, and can maintain excellent impact resistance and braking stability under more severe operating conditions.

[0046] The following is another specific embodiment 3 of this utility model: This embodiment 3 is based on embodiment 1, and the surface structure of the friction layer is improved. The number of arc-shaped protrusions is increased to 10, and the spacing between each protrusion is reduced to 12mm, which further increases the contact area by about 35%. The number of heat conduction grooves is increased accordingly, resulting in better heat dissipation. At the same time, grooves that are distributed horizontally and vertically are added to the buffer layer to form a grid-like groove structure. There are 4 horizontal grooves and 4 vertical grooves that are perpendicular to each other. The width and depth of the grooves are the same as the radial grooves in embodiment 1. The grid-like grooves make the flexibility of the buffer layer more consistent in all directions, which can cope with impact loads from different directions. The height of the brake base plate edge reinforcing ribs is increased to 10mm, which further improves the overall rigidity of the base plate. The number of fasteners is increased to 6. In addition to the original 4 fasteners, 1 is added at the midpoint of the long side of the brake base plate, which enhances the connection reliability of each layer structure. This embodiment is suitable for racing cars or performance vehicles and can provide maximum impact protection and performance stability under extreme braking conditions.

[0047] Specifically, the principle of this invention is as follows: The core of this invention lies in introducing a specially designed buffer layer between the brake plate and the friction layer, constructing a three-layer composite structure with gradient mechanical properties. When the brake disc contacts the friction layer and generates an impact force, the impact energy is first borne by the friction layer. Because an elastic buffer layer is provided below the friction layer, the impact force is not directly transmitted to the rigid brake plate but is buffered and absorbed through the elastic deformation of the buffer layer. The high elastic modulus of the buffer layer material allows it to generate large recoverable deformation under pressure, converting the impact kinetic energy into the elastic potential energy of the buffer layer and a small amount of heat dissipation, thereby significantly reducing the peak impact stress transmitted to the brake plate. The design of the buffer layer thickness decreasing from the center to the edge ensures that the stiffness distribution matches the braking pressure distribution. The thicker buffer layer in the central area provides a larger buffer capacity to cope with concentrated braking force, while the thicker buffer layer at the edges provides a greater buffer capacity. The thinner buffer layer ensures sufficient rigid support, while the radial grooves on the bottom surface of the buffer layer provide additional deformation space for elastic deformation, enhancing the overall flexibility of the buffer layer. At the same time, the groove structure allows the pressure to be distributed more evenly on the brake pad. The arc-shaped protrusions on the surface of the friction layer further optimize the stress distribution and provide heat dissipation channels by increasing the contact area and improving the contact state. The reinforcing ribs on the edge of the brake pad improve the bending stiffness of the base plate, ensuring that the base plate remains flat when the buffer layer deforms, and that the overall stress state is not affected by local deformation. The penetrating fasteners of the fasteners enable the various layers to work together when bearing loads, avoiding relative slippage between layers. Through this multi-layered structural design and precise matching of the dimensions and positions of the components, this invention achieves effective control and dispersion of impact energy, solving the problem of insufficient impact resistance of brake pads from a mechanistic perspective.

[0048] During installation, first align the first surface of the brake pad with the mounting surface of the brake system, ensuring the first through hole on the brake pad aligns with the mounting hole on the mounting surface. Then, pass the fastener through the third through hole of the friction layer, the second through hole of the buffer layer, and the first through hole of the brake pad, and tighten it with the threaded hole or nut on the mounting surface. During tightening, apply torque gradually in a diagonal sequence to ensure uniform pressure on each layer. After installation, the working surface of the friction layer should be parallel to the brake disc surface with uniform gap. During use, when the driver depresses the brake pedal, the braking system pushes the brake pads towards the brake disc. The working surface of the friction layer first contacts the brake disc, and as the braking force increases... The increased friction between the friction layer and the brake disc generates frictional torque, causing the vehicle to decelerate. The resulting impact force is transmitted through the friction layer to the buffer layer, which absorbs the impact energy through elastic compression deformation. The force is then transmitted to the brake pads. After braking, the buffer layer returns to its initial state due to its elasticity, preparing for the next braking. During long-term use, the wear of the friction layer should be checked regularly. When the friction layer thickness wears down to the limit, the entire brake pad assembly needs to be replaced. When replacing, the fasteners should be disassembled in the reverse order of installation. After removing the old brake pads, the mounting surface should be cleaned, and then the new brake pads should be installed according to the installation steps. The entire operation does not require special tools, making maintenance and replacement convenient.

Claims

1. An impact-resistant brake pad device with a buffer layer, comprising a brake base plate, a buffer layer, a friction layer, and a fixing member, wherein the brake base plate has a plate-like structure, a first surface of the brake base plate is used for fixed connection with a mounting surface of a brake system, a second surface of the brake base plate is disposed opposite to the first surface, the buffer layer is disposed on the second surface of the brake base plate, the buffer layer is made of an elastic material, the friction layer is disposed on the side of the buffer layer away from the brake base plate, the working surface of the friction layer is used for contacting a brake disc to generate friction, and the fixing member passes through the friction layer, the buffer layer, and the brake base plate to fasten the friction layer, the buffer layer, and the brake base plate together.

2. The impact-resistant brake pad device with a buffer layer according to claim 1, characterized in that, The thickness of the buffer layer gradually decreases from the geometric center of the brake base plate towards the edge.

3. The impact-resistant brake pad device with a buffer layer according to claim 2, characterized in that, The buffer layer has multiple grooves on the surface that contacts the brake base plate. The grooves are radially distributed and the depth of the grooves is 1 / 3 to 1 / 2 of the thickness of the buffer layer.

4. The impact-resistant brake pad device with a buffer layer according to claim 3, characterized in that, The working surface of the friction layer is provided with multiple arc-shaped protrusions, which are arranged along the radial direction of the friction layer, and a heat-conducting groove is formed between two adjacent arc-shaped protrusions.

5. The impact-resistant brake pad device with a buffer layer according to claim 4, characterized in that, The edge portion of the brake substrate is bent away from the buffer layer to form a reinforcing rib, and the reinforcing rib forms an angle of 80~100° with the first surface of the brake substrate.

6. The impact-resistant brake pad device with a buffer layer according to claim 5, characterized in that, The area of ​​the surface of the buffer layer that contacts the brake base plate is larger than the area of ​​the surface of the friction layer that contacts the buffer layer, and the edge of the buffer layer extends beyond the edge of the friction layer to form a protective edge.

7. The impact-resistant brake pad device with a buffer layer according to claim 6, characterized in that, The fastener is a bolt structure. A first through hole is formed on the brake base plate, a second through hole is formed on the buffer layer, and a third through hole is formed on the friction layer. The first through hole, the second through hole, and the third through hole are coaxially arranged in a direction perpendicular to the first surface of the brake base plate.

8. The impact-resistant brake pad device with a buffer layer according to claim 7, characterized in that, The buffer layer is made of rubber or polyurethane material.

9. The impact-resistant brake pad device with a buffer layer according to claim 8, characterized in that, The friction layer is made of ceramic matrix composite material or semi-metallic friction material.

10. The impact-resistant brake pad device with a buffer layer according to claim 9, characterized in that, The brake base plate is made of steel plate, and the thickness of the brake base plate is 2 to 3 times the maximum thickness of the buffer layer.

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