Brake pad

Abstract

The utility model relates to a brake pad, and belongs to the technical field of brake devices. Comprising a backboard, a friction block, an alarm line and an alarm system. A friction block is fixedly installed on the back plate, a wire embedding groove is formed in the friction block, and the area of a pattern defined by the wire embedding groove is close to the area of a working face of the friction block. The bottom of the wire embedding groove is provided with an alarm wire, and the alarm system is connected with the alarm wire. According to the brake pad, the alarm line is distributed in a large range of the brake pad, so that the alarm line can be abraded no matter which side of the friction block is greatly abraded, an alarm signal is sent out, the alarm area is greatly increased, the safety of the brake pad is greatly improved, and when the brake pad is eccentrically abraded or at different positions of one surface, the brake pad can be prevented from being damaged. As long as the natural loop line where the alarm line is located is abraded, a signal can be transmitted to the automobile ECU, an instrument panel is displayed to give an alarm, and an automobile owner is reminded that the brake pad is abraded and needs to be replaced in time.

Description

Technical Field

[0001] This utility model relates to the field of braking device technology, and in particular to a brake pad. Background Technology

[0002] Brake pads, also called brake linings, are the friction material fixed to the inside of the brake drum or the inside and outside of the brake disc in a car's braking system. The friction linings and pads bear the pressure from the brake cylinder, generating friction to slow the vehicle down. Brake pads are among the most critical safety components in a car. Over time, brake pads wear down, causing thinning in certain areas, which reduces braking performance and can easily lead to dangerous situations.

[0003] To ensure the safe operation of the braking system, an alarm system is usually installed in the brake pads. In the current technology, the brake pad alarm line is only located at a single point. When the brake pad is worn on only one side or at different locations on one side (i.e., not at the location of the brake pad alarm line), the alarm device cannot correctly detect the wear of the brake pad, thus failing to notify the owner to replace the brake pad in time, which poses a significant safety hazard. Utility Model Content

[0004] To solve or partially solve the problems existing in related technologies, this utility model provides a brake pad, which aims to improve the early warning effect of the brake pad alarm device.

[0005] The aforementioned brake pad includes a backing plate, a friction block, a warning wire, and a warning system;

[0006] A friction block is fixedly installed on the back plate, and a wire groove is constructed on the friction block. The area of ​​the shape enclosed by the wire groove is close to the area of ​​the working surface of the friction block. An alarm line is provided at the bottom of the wire groove, and the alarm system is connected to the alarm line.

[0007] In some designs, the embedded wire groove is arranged parallel to the edge of the friction block and surrounds the friction block.

[0008] In some designs, the pattern formed by the buried wire groove is similar in shape to the friction block.

[0009] In some designs, the shape formed by the buried cable trench is trapezoidal or trapezoidal.

[0010] In some designs, the buried cable groove is provided with a wear-resistant, high-temperature-resistant, non-conductive insulating layer located above the alarm line, and the surface of the non-conductive insulating layer is flush with the surface of the friction block.

[0011] In some designs, the alarm line is wrapped with insulating material.

[0012] In some designs, an insulating ring is provided on one side of the friction block, and the alarm wire is routed around the buried wire groove once, with both ends leading out from the insulating ring.

[0013] In some implementations, the alarm system includes a power supply and an alarm circuit; one end of the alarm line is connected to the power supply, and the other end of the alarm line is connected to the power supply through the alarm circuit.

[0014] The technical solution provided by this utility model can include the following beneficial effects:

[0015] This application distributes the warning lines over a larger area of ​​the brake pads, ensuring that regardless of which side of the friction pad experiences significant wear, the warning lines will be reached, triggering an alarm signal. This contrasts with existing technologies that use a single-point warning, which cannot provide timely feedback on brake pad wear (i.e., where the friction point is not at the warning line location and the thickness change in non-friction areas of the brake pad is minimal). This prevents timely brake pad replacement by the vehicle owner, potentially leading to serious safety accidents. This application significantly increases the warning area and brake pad safety. When the brake pads show uneven wear or wear at different locations on one side, as long as the natural return path of the warning line is broken, a signal is transmitted to the vehicle's ECU, displaying an alarm on the dashboard and reminding the owner that the brake pads are worn and need to be replaced promptly.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0018] Figure 1 This is a schematic diagram of the structure of a brake pad shown in an embodiment of the present invention;

[0019] Figure 2 This is another structural schematic diagram of the brake pad shown in this embodiment of the present invention;

[0020] Figure 3 yes Figure 2 A magnified view of point A;

[0021] Figure 4 This is a circuit diagram of the brake pads shown in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the connection circuit of the alarm line of the brake pads shown in an embodiment of this utility model;

[0023] Figure 6 This is another structural schematic diagram of the brake pad shown in this embodiment of the present utility model;

[0024] Reference numerals:

[0025] 1. Backplate; 2. Friction block; 3. Alarm line; 31. Positive line; 32. Negative line; 4. Cable tray; 5. Non-conductive insulation layer; 6. Insulating ring. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the content described.

[0027] Please see Figure 1 , Figure 2 , Figure 3 and Figure 6 This application provides a brake pad, including a backing plate 1, a friction block 2, an alarm wire 3, and an alarm system; the backing plate 1 provides support for the overall structure of the brake pad and serves as a component connected to the vehicle, transmitting the braking force of the brake caliper. The friction block 2 is fixedly installed on the backing plate 1, and the side of the friction block 2 facing away from the backing plate 1 is the working surface, which rubs against the brake pad during operation to perform braking.

[0028] The friction block 2 has a wire groove 4, and an alarm line 3 is provided at the bottom of the wire groove 4. The alarm system is connected to the alarm line 3. As the friction block 2 wears down, its thickness gradually decreases until it begins to rub against the alarm line 3. When the alarm line 3 in the wire groove 4 is worn off, the alarm system sends an alarm signal to remind the car owner to replace or repair the brake pads in time to ensure driving safety.

[0029] The depth of the embedded groove 4 inside the friction block 2 is greater than or equal to the friction limit position. Generally, the thickness of the friction block 2 is 10mm, and the friction limit position is 2.5-3mm. Therefore, the depth of the embedded groove 4 in the friction block 2 from the non-friction surface to the groove position is 3.5mm. The 0.5mm space is reserved so that the brake pads can still play a braking role if the car owner cannot replace the brake pads in time after the warning.

[0030] In this embodiment, the embedded groove 4 forms a closed shape or an open shape, i.e., a shape with a small gap. The area of ​​the shape formed by the embedded groove 4 is close to the area of ​​the working surface of the friction block 2, maximizing the detection and warning range of the alarm line 3. When the brake pad is worn on one side or at different positions on one side, it can also be detected, effectively improving the warning capability and effect. When the shape formed by the embedded groove 4 is an open shape, the open part is filled with a line parallel to the friction block 2, and then used as the area of ​​the shape formed by the embedded groove 4 for calculation.

[0031] In some specific embodiments, the buried wire groove 4 is arranged parallel to the edge of the friction block 2 and surrounds the friction block 2. In this way, each point of the alarm line 3 is close to the edge of the friction block 2, so that no matter which side of the friction block 2 wears first, it can be detected by the alarm line 3, which further improves the accuracy of the alarm.

[0032] In some specific embodiments, the shape formed by the buried wire groove 4 is similar to the shape of the friction block 2, such as trapezoidal or trapezoidal, for example, the buried wire groove 4 has a groove length of 2mm and a height of 1.5mm.

[0033] In some specific embodiments, the embedded wire groove 4 is provided with a wear-resistant and high-temperature resistant non-conductive insulating layer 5 located above the alarm line 3. For example, polyimide material is selected, which has the characteristics of high temperature resistance, high insulation, excellent mechanical properties, and good chemical stability. When it is fused with the friction block 2, it does not affect the braking effect of the friction block 2. The surface of the non-conductive insulating layer 5 is flush with the surface of the friction block 2. In this way, the embedded wire groove 4 is filled by the non-conductive insulating layer 5, so that the setting of the embedded wire groove 4 does not affect the braking effect of the brake pad.

[0034] In some specific embodiments, the alarm line 3 is wrapped with an insulating sheath made of a material with good insulation properties to protect the alarm line 3.

[0035] In some specific embodiments, an insulating ring 6 is provided on one side of the friction block 2. The insulating ring 6 is integrally processed and fixed with the insulating filling material (i.e., non-conductive insulating layer 5) used around the buried wire groove 4. The insulating ring 6 is used to improve the connection between the alarm line 3 and the friction block 2 and to prevent the alarm line 3 from being relatively displaced during the wear of the friction block 2.

[0036] In some specific implementations, such as Figure 4 and Figure 5As shown, the alarm system includes a power supply and an alarm circuit; one end of the alarm wire 3 is connected to the power supply, and the other end of the alarm wire 3 is connected to the power supply through the alarm circuit. The alarm circuit is as shown. The alarm wire 3 is divided into a positive line 31 and a negative line 32. The positive line 31 and the negative line 32 form an alarm wire module in the circuit diagram.

[0037] Specifically, the positive line 31 and the negative line 32 are led out from the rubber protective sleeve at the end far from the friction block 2, and two symmetrical brake pads on the wheel are connected in series through a plug, so that the two symmetrical brake pads form a circuit loop. No matter which side of the alarm wire 3 is worn out during braking, as long as one side is worn out, the alarm light will turn on (such as Figure 4 the light-emitting diode in the circuit diagram shown) and immediately transmit a signal to inform the vehicle owner that the brake pads need to be replaced.

[0038] The positive line 31 is connected to the positive pole of a 12V DC power supply. One end of the negative line 32 is connected to the LM393 voltage comparator element, and the other end is connected in series with a resistor to the negative pole of the 12V DC power supply. The negative line 32 is connected to the pin of the LM393 voltage comparator element, which is defined as the input voltage U1; the pin of the LM393 voltage comparator element is defined as the reference voltage U2, which is the power supply voltage of 10V; the pin 1 of the LM393 voltage comparator element is defined as the output voltage U3, and the line of pin 1 is connected to the base of the 8550 PNP triode. When U3 < U2, U1 is positive, and the base of the 8550 PNP triode is in the saturation state, then the triode conducts and the light-emitting diode lights up; conversely, when U3 > U2. U1 is negative, and the base of the 8550 PNP triode is in the cut-off state, then the triode does not conduct and the light-emitting diode does not light up. That is, when the alarm wire 3 is not worn out, as Figure 4 shown in the circuit diagram, the second loop where the alarm wire 3 module is located is normally conducting, the voltage of the negative line 32 is 12V, U3 > U2, the output voltage U1 is negative, the triode is in the cut-off state, and the loop where the light-emitting diode is located is not powered on, and the signal indicating that the brake pads need to be replaced will not be displayed. Once the alarm wire 35 is worn out during braking, the voltage of the negative line 329 becomes 0V, resulting in U3 < U2, the output voltage U1 is positive, the base of the triode is in the saturation state, the loop where the light-emitting diode is located is powered on, and the signal to replace the brake pads is transmitted.

[0039] The working principle of this application is as follows:

[0040] During use, when the friction block 2 is engaged in braking, wear may occur in one or more places under different working conditions. The shape of the embedded groove 4 is similar to that of the brake pad, which greatly increases the alarm area and provides reliable safety protection. Regardless of whether the wear is uneven or different positions on the same surface, as long as the friction block 2 becomes thinner due to friction loss, the alarm wire 3 in the embedded groove 4 at the non-friction surface of the friction block 2 in contact with the back plate 1 will be worn off. That is, the natural circuit where the alarm wire 3 is located becomes an open circuit, causing the voltage of the negative line 9 to become 0V. This makes the voltage at pin 3 of the LM393 voltage comparator less than the voltage at pin 2 of the LM393 voltage comparator. The output voltage at pin 1 of the LM393 voltage comparator is positive, the base of the 8550PNP transistor is in a saturated state, the circuit where the light-emitting diode is located is energized, and the signal to replace the brake pad is transmitted to the car ECU. The instrument panel displays an alarm, which promptly reminds the owner to replace the brake pad.

[0041] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A brake pad, characterized in that: Includes backplate (1), friction block (2), alarm wire (3), and alarm system; A friction block (2) is fixedly installed on the back plate (1). A wire groove (4) is constructed on the friction block (2), and the area of ​​the figure enclosed by the wire groove (4) is close to the area of ​​the working surface of the friction block (2). An alarm line (3) is provided at the bottom of the wire groove (4), and the alarm system is connected to the alarm line (3).

2. A brake pad according to claim 1, characterized in that: The buried wire groove (4) is arranged parallel to the edge of the friction block (2) and surrounds the friction block (2) in a circle.

3. A brake pad according to claim 1, characterized in that: The shape formed by the buried wire groove (4) is similar to that of the friction block (2).

4. A brake pad according to claim 3, characterized in that: The shape formed by the buried wire groove (4) is trapezoidal or trapezoidal.

5. A brake pad according to claim 1, characterized in that: The buried wire groove (4) is provided with a wear-resistant and high-temperature resistant non-conductive insulating layer (5) located above the alarm line (3), and the surface of the non-conductive insulating layer (5) is flush with the surface of the friction block (2).

6. A brake pad according to claim 1, characterized in that: The alarm line (3) is wrapped with insulating material.

7. A brake pad according to claim 1, characterized in that: An insulating ring (6) is provided on one side of the friction block (2). After the alarm line (3) is wrapped around the buried wire groove (4), both ends are led out from the insulating ring (6).

8. A brake pad according to claim 1, characterized in that: The alarm system includes a power supply and an alarm circuit; one end of the alarm line (3) is connected to the power supply, and the other end of the alarm line (3) is connected to the power supply through the alarm circuit.

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