Environment-friendly sintered brake pad

Abstract

The utility model discloses an environmental protection type sintered brake pad, include: backboard and the friction block of through detachable mechanical connecting structure connection in backboard, the side of friction block close backboard still is provided with the sound attenuation shock attenuation layer, between friction block and backboard, be equipped with temperature -sensitive linkage, temperature -sensitive linkage is configured as: when brake pad operating temperature exceeds the preset threshold value, produce a mechanical thrust in the direction of brake disc direction, to compensate the friction coefficient drop due to high temperature. The environmental protection type sintered brake pad provided by the utility model realizes the separation of friction block and backboard through detachable mechanical connecting structure. When replacing the brake pad, only need to replace the worn friction block, and the expensive metal backboard can be repeatedly used, greatly saving the metal resources, and the temperature -sensitive linkage can real -time response brake pad temperature, and actively exert additional mechanical thrust when high temperature, effectively offset the braking force loss brought by the friction coefficient drop, ensure the stability of the braking performance.

Description

Technical Field

[0001] This utility model relates to the field of automotive braking technology, and in particular to environmentally friendly sintered brake pads. Background Technology

[0002] Brake pads are a critical safety component in a car's braking system, and their performance directly affects driving safety. Traditional sintered brake pads typically have the following problems: Resource waste and environmental pollution: Traditional brake pads bond the friction material and metal backing plate together through high-temperature sintering or strong bonding, forming an inseparable whole. When the friction material wears down to its limit and needs to be replaced, the entire brake pad (including the intact metal backing plate) is discarded, resulting in a huge waste of metal resources and increasing the pressure on solid waste disposal.

[0003] Poor environmental friendliness of materials: In pursuit of performance, some traditional brake pads still use materials harmful to the environment and human health, such as asbestos (a proven carcinogen), copper, and its alloys. The dust generated by brake wear contains these heavy metals, which can enter soil and water bodies with rainwater, causing serious environmental pollution.

[0004] High-temperature thermal fade problem: Under extreme conditions such as continuous or emergency braking, the operating temperature of brake pads will rise sharply. When the temperature exceeds a certain threshold, the coefficient of friction of the friction material will decrease significantly, that is, "thermal fade" occurs, resulting in weakened braking force, longer braking distance, and posing a serious safety hazard.

[0005] Therefore, there is an urgent need to develop a new type of environmentally friendly sintered brake pad to solve one or more of the above problems. Utility Model Content

[0006] Therefore, it is necessary to provide environmentally friendly sintered brake pads to address the aforementioned technical problems, aiming to solve the problems of resource waste, environmentally unfriendly materials, performance degradation at high temperatures, and high noise caused by the integral structure of existing brake pads.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An environmentally friendly sintered brake pad includes: a backing plate and a friction block connected to the backing plate by a detachable mechanical connection structure; The friction block is also provided with a sound-absorbing and vibration-damping layer on the side near the back plate; A temperature-sensitive linkage mechanism is provided between the friction block and the back plate; The temperature-sensitive linkage mechanism is configured to generate a mechanical thrust pointing towards the brake disc when the working temperature of the brake pads exceeds a preset threshold, in order to compensate for the decrease in the coefficient of friction caused by high temperature.

[0008] Furthermore, the sound-absorbing and vibration-damping layer is a polymer composite material layer or a rubber layer.

[0009] Furthermore, a plurality of heat dissipation grooves are provided on the friction surface of the friction block, and the heat dissipation grooves extend from the inner edge to the outer edge of the friction block.

[0010] Furthermore, the detachable mechanical connection structure includes a hinge seat disposed on the top of the back plate and a hinge arm fixedly connected to the top of the friction block, wherein the hinge seat and the hinge arm are rotatably connected by a pin.

[0011] Furthermore, a torque shaft is fitted onto the outer wall of the pin, and the two ends of the torque shaft are fixedly connected to the hinge seat and the hinge arm, respectively, to provide the friction block with an elastic thrust close to the back plate.

[0012] Furthermore, the temperature-sensitive linkage mechanism is either a bimetallic strip or a shape memory alloy spring.

[0013] Furthermore, the temperature-sensitive linkage mechanism is a bimetallic strip with a V-shaped structure and its two side walls are fixedly connected to the back plate and the friction block, respectively. The inner side wall of the back plate has a cavity adapted to the bimetallic strip.

[0014] Furthermore, the friction block is one of the copper-free, asbestos-free ceramic-based or composite-based environmentally friendly materials.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The environmentally friendly sintered brake pads provided by this invention achieve separation of the friction block and the backing plate through a detachable mechanical connection structure. When replacing the brake pads, only the worn friction block needs to be replaced, and the expensive metal backing plate can be reused, greatly saving metal resources, reducing solid waste, and conforming to the environmental protection concept of a circular economy. The temperature-sensitive linkage mechanism can sense the brake pad temperature in real time and actively apply additional mechanical thrust at high temperatures, effectively offsetting the braking force loss caused by the decrease in the coefficient of friction, ensuring stable braking performance under extreme conditions, and significantly improving driving safety. Furthermore, the unfolded friction block allows for convenient and rapid heat dissipation, facilitating subsequent braking actions.

[0016] The sound-absorbing and vibration-damping layer added between the friction block and the backing plate can effectively absorb and buffer the high-frequency vibrations generated during braking, suppressing the generation of brake noise from the source and improving driving comfort. The heat dissipation groove design on the surface of the friction block can effectively guide airflow, enhance heat dissipation efficiency, reduce the working temperature of the brake pads, delay the occurrence of heat fade, and at the same time reduce high-temperature wear and extend service life. Attached Figure Description

[0017] Figure 1A schematic diagram of the structure of the environmentally friendly sintered brake pad provided by this utility model; Figure 2 A schematic diagram of the unfolded structure of the environmentally friendly sintered brake pad provided by this utility model; Figure 3 A side view of the environmentally friendly sintered brake pad provided by this utility model; Figure 4 The environmentally friendly sintered brake pad provided by this utility model Figure 2 Cross-sectional structural diagram.

[0018] The markings in the diagram are explained as follows: 1. Backplate; 11. Hinge mount; 12. Hinge arm; 13. Pin; 2. Friction block; 21. Heat dissipation groove; 3. Noise-absorbing and vibration-damping layer; 4. Temperature-sensitive linkage mechanism. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0020] Example 1

[0021] Please refer to Figure 1-4 Environmentally friendly sintered brake pads, including: Back plate 1 and friction block 2 connected to back plate 1 by a detachable mechanical connection structure; A sound-absorbing and vibration-damping layer 3 is also provided on the side of the friction block 2 near the back plate 1; A temperature-sensitive linkage mechanism 4 is provided between the friction block 2 and the back plate 1; The temperature-sensitive linkage mechanism 4 is configured to generate a mechanical thrust pointing in the direction of the brake disc when the working temperature of the brake pads exceeds a preset threshold, in order to compensate for the decrease in the coefficient of friction caused by high temperature.

[0022] The sound-absorbing and vibration-damping layer 3 is a polymer composite material layer or a rubber layer.

[0023] Specifically, when the friction block 2 needs to be replaced, the maintenance personnel only need to pull out the pin 13 to separate the old friction block 2, along with its hinge arm 12, from the hinge seat 11 of the back plate 1. Installing a new friction block 2 is the reverse process. The torsion spring provides a constant elastic force after installation, pressing the hinge arm 12 firmly against the hinge seat 11. This hinged structure not only makes disassembly and assembly extremely convenient, but the preload provided by the torsion spring ensures that the friction block 2 fits tightly against the back plate 1 during operation, eliminating any potential gaps and abnormal noises. Beneficial effects: It truly achieves rapid and low-cost replacement of the friction block; the back plate 1 can be recycled dozens of times, resulting in significant economic and environmental benefits, and perfectly solving the resource waste problem of traditional integrated brake pads.

[0024] Example 2

[0025] The environmentally friendly sintered brake pads provided in Embodiment 1 are further optimized. Specifically, a plurality of heat dissipation grooves 21 are provided on the friction surface of the friction block 2, and the heat dissipation grooves 21 extend from the inner edge to the outer edge of the friction block 2.

[0026] Specifically, several heat dissipation grooves 21 are machined on the friction surface where the friction block 2 contacts the brake disc. These heat dissipation grooves 21 are radial or linear, extending from the inner diameter edge of the friction block 2 to the outer diameter edge. When the brake pads rotate with the wheel, these grooves act like water pump blades, forcing air to be drawn in from the center and flowing outward along the grooves, forming a forced airflow. This design greatly enhances the convective heat dissipation effect and can quickly remove the heat accumulated on the contact surface between the brake disc and the friction block.

[0027] Example 3

[0028] The environmentally friendly sintered brake pads provided in Embodiment 1 or 2 are further optimized. The detachable mechanical connection structure includes a hinge seat 11 disposed on the top of the back plate 1 and a hinge arm 12 fixedly connected to the top of the friction block 2. The hinge seat 11 and the hinge arm 12 are rotatably connected by a pin 13.

[0029] A torque shaft is fitted on the outer wall of the pin 13, and the two ends of the torque shaft are fixedly connected to the hinge seat 11 and the hinge arm 12 respectively to provide the friction block 2 with an elastic thrust close to the back plate 1.

[0030] Specifically, the noise-absorbing and vibration-damping layer 3 is made of a high-molecular composite material or rubber with high damping properties. When the friction block 2 vibrates, this layer dissipates the vibration energy into heat energy through the movement and friction of its internal molecular chains. Beneficial effects: It effectively blocks the transmission path of vibration from the friction block to the back plate, significantly reducing braking noise and vibration, and improving driving smoothness and comfort.

[0031] Example 4

[0032] The environmentally friendly sintered brake pads provided in Example 3 are further optimized, and the temperature-sensitive linkage mechanism 4 is either a bimetallic strip or a shape memory alloy spring.

[0033] The temperature-sensitive linkage mechanism 4 is a bimetallic strip. The bimetallic strip has a V-shaped structure and its two side walls are fixedly connected to the back plate 1 and the friction block 2, respectively. The inner side wall of the back plate 1 has a cavity that is adapted to the bimetallic strip.

[0034] Specifically, under normal temperature conditions: when the brake pads are at their normal operating temperature (such as below 250°C), the V-shaped bimetallic strip maintains its initial shape and does not generate additional thrust. The brake pads rely on the hydraulic pressure of the caliper to operate normally.

[0035] Under high-temperature conditions: When a vehicle is going downhill for a long time or undergoing continuous emergency braking, the brake pad temperature rises sharply and exceeds a preset threshold (such as 300°C). The V-shaped bimetallic strip begins to "unfold" and straighten due to the difference in the thermal expansion coefficients of the two metals.

[0036] Generating thrust: This "unfolding" action pushes open the two fixed points (i.e., back plate 1 and friction block 2). Since back plate 1 is fixed by the caliper, the reaction force will push the friction block 2 as a whole towards the brake disc, producing a small displacement, i.e., mechanical thrust.

[0037] The mechanical thrust increases the normal pressure between the friction block 2 and the brake disc, thereby compensating for the decrease in the coefficient of friction caused by high temperature, and keeping the total friction torque (coefficient of friction × normal pressure) at a relatively stable level.

[0038] Example 5

[0039] The environmentally friendly sintered brake pads provided in Example 4 are further optimized, and the friction block 2 is one of the copper-free and asbestos-free ceramic-based or composite-based environmentally friendly materials.

[0040] Specifically, these materials are asbestos-free, eliminating the dangers of carcinogenic dust; and copper-free, avoiding heavy metal pollution of water bodies. Furthermore, these new environmentally friendly materials have been optimized, achieving or even surpassing the friction performance, wear resistance, and thermal stability of traditional copper-containing materials, thus realizing a balance between environmental protection and performance.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. An environmentally friendly sintered brake pad, characterized in that: Includes a back plate (1) and a friction block (2) connected to the back plate (1) by a detachable mechanical connection structure; The friction block (2) is also provided with a sound-absorbing and vibration-damping layer (3) on the side near the back plate (1); A temperature-sensitive linkage mechanism (4) is provided between the friction block (2) and the back plate (1). The temperature-sensitive linkage mechanism (4) is configured to generate a mechanical thrust pointing in the direction of the brake disc when the working temperature of the brake pad exceeds a preset threshold, in order to compensate for the decrease in the coefficient of friction caused by high temperature.

2. The environmentally friendly sintered brake pad according to claim 1, characterized in that, The sound-absorbing and vibration-damping layer (3) is a polymer composite material layer or a rubber layer.

3. The environmentally friendly sintered brake pad according to claim 1, characterized in that, The friction surface of the friction block (2) is provided with a plurality of heat dissipation grooves (21), which extend from the inner edge to the outer edge of the friction block (2).

4. The environmentally friendly sintered brake pad according to claim 1, characterized in that, The detachable mechanical connection structure includes a hinge seat (11) disposed on the top of the back plate (1) and a hinge arm (12) fixedly connected to the top of the friction block (2), wherein the hinge seat (11) and the hinge arm (12) are rotatably connected by a pin (13).

5. The environmentally friendly sintered brake pad according to claim 4, characterized in that, A torque shaft is fitted on the outer wall of the pin (13), and the two ends of the torque shaft are fixedly connected to the hinge seat (11) and the hinge arm (12) respectively to provide the friction block (2) with an elastic thrust close to the back plate (1).

6. The environmentally friendly sintered brake pad according to claim 1, characterized in that, The temperature-sensitive linkage mechanism (4) is either a bimetallic strip or a shape memory alloy spring.

7. The environmentally friendly sintered brake pad according to claim 6, characterized in that, The temperature-sensitive linkage mechanism (4) is a bimetallic strip. The bimetallic strip has a V-shaped structure and its two side walls are fixedly connected to the back plate (1) and the friction block (2) respectively. The inner side wall of the back plate (1) has a cavity that is compatible with the bimetallic strip.

8. The environmentally friendly sintered brake pad according to claim 1, characterized in that, The friction block (2) is one of the copper-free, asbestos-free ceramic-based or composite-based environmentally friendly materials.

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