Brake pad capable of achieving early warning of abrasion

Abstract

The brake pad comprises an arc-shaped framework and a friction plate which are connected with each other, the friction plate is fixed on the outer end face of the arc-shaped framework, an abrasion early-warning device placing groove is formed in the friction plate, and an abrasion early-warning device is arranged in the abrasion early-warning device placing groove. An infrared distance meter and a wear detection device are fixedly arranged in the wear early warning device placing groove, and when the friction plate brakes, the infrared distance meter measures the distance of the wear detection device pressed by a hub so as to determine the wear thickness of the friction plate. According to the device, the abrasion detection device capable of being pressed by the hub in the braking process after the friction plate is abraded is arranged on the friction plate, and the abrasion degree of the friction plate is judged by detecting the distance of the abrasion detection device through the infrared distance meter, so that the abrasion degree of the brake pad can be virtualized; a user can conveniently judge the abrasion condition of the brake pad; the device is simple in structure, convenient to use and relatively low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of drum brake pads, in particular to a brake pad with wear warning capability. Background Art

[0002] Brake pads are the most critical safety component in a vehicle's braking system, playing a crucial role in the vehicle's braking performance. Brake pads typically consist of a steel backing plate and a friction lining made of friction material, bonded to the backing plate by an adhesive layer and often also provided with a thermal insulation layer. Due to the hard contact between brake pads and the brake drum, long-term use can lead to significant wear and tear on the lining, reducing braking effectiveness. Furthermore, prolonged, uninterrupted braking can lead to high temperatures in the lining, which can easily cause brake failure. Drum brake pads are particularly vulnerable to wear and tear because they are mounted inside the drum, making it difficult to detect wear without removal. Furthermore, the presence of the brake pad inside the drum hinders heat dissipation. Promptly monitoring wear and temperature status can help mitigate potential risks. Patent number CN219176835U, titled "A Drum Brake Pad," utilizes a wear sensing module and a thermistor to simultaneously monitor temperature and wear. This allows the vehicle's central control processor to monitor the brake pad's temperature and wear during use, enabling the user to take appropriate measures to mitigate potential risks. However, multiple wear sensing units need to be set at different depths in the module mounting base, and the degree of wear cannot be detected at the same time. Moreover, the entire device is relatively complex and the production is relatively cumbersome, and the production cost will also increase accordingly. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a brake pad with early warning of wear.

[0004] According to the technical solution provided in the embodiment of the present application, a brake pad with wear warning includes an arc-shaped frame and a friction plate connected to each other. The friction plate is fixed on the outer end face of the arc-shaped frame. A groove for placing a wear warning device is provided on the friction plate. An infrared rangefinder and a wear detection device are fixed in the groove for placing the wear warning device. When the friction plate is braking, the infrared rangefinder measures the distance that the wear detection device is pressed by the wheel hub to determine the wear thickness of the friction plate.

[0005] Furthermore, the wear detection device includes a compression spring, a fixed ball and a ball bearing. One end of the compression spring is fixedly connected to the bottom end surface of the groove where the wear warning device is placed, and the other end is fixedly connected to the fixed ball. The ball bearing can roll in the fixed ball. In this way, the rolling of the ball bearing can reduce the friction between the brake pad and the vehicle hub during braking, thereby damaging the ball bearing and affecting the accuracy of the subsequent infrared rangefinder's ranging.

[0006] Furthermore, the ball is close to the outer end surface of the friction plate, so that after the friction plate is worn, the wheel hub can press the ball, causing the distance from the ball to the bottom end surface of the groove where the wear warning device is placed to change, and then be detected by the infrared rangefinder.

[0007] Furthermore, the end surface of the fixed ball is slidably connected to the groove where the wear warning device is placed to prevent the fixed ball from being offset when the wheel hub presses the ball, thereby affecting the accuracy of distance measurement.

[0008] Furthermore, the fixed ball can be replaced with a fixed block, as long as it can be ensured that the ball can roll inside the fixed ball.

[0009] Furthermore, the friction plate is provided with a wire passing hole to facilitate power supply and signal reception of the infrared rangefinder.

[0010] To sum up, the beneficial effects of the present application are as follows: the device of the present application is provided with a wear detection device on the friction plate, which can be pressed by the wheel hub during the braking process after the friction plate is worn. The wear degree of the friction plate is judged by detecting the distance of the wear detection device by an infrared rangefinder, so that the wear degree of the brake pad can be materialized, which is convenient for the user to judge the wear condition of the brake pad; the device has a simple structure, is easy to use, and has a correspondingly low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0012] Figure 1 This is a schematic structural diagram of the overall device of the utility model;

[0013] Figure 2 This is a schematic diagram of the front cross-sectional structure of the overall device of the utility model;

[0014] Figure 3 This is an enlarged view of the connection structure of the infrared rangefinder, wear detection device and friction plate of the utility model;

[0015] Figure 4 This is a schematic structural diagram of the wear detection device of the present utility model.

[0016] Reference numerals in the figure: arc-shaped skeleton-1; friction plate-2; wire passage hole-21; wear warning device placement groove-3; infrared rangefinder-4; wear detection device-5; compression spring-51; fixing ball-52; ball-53. DETAILED DESCRIPTION

[0017] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0018] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] A brake pad with wear warning function, such as Figure 1 and Figure 2 As shown, the friction plate 2 is fixed to the outer end surface of the arc-shaped skeleton 1, and a wear warning device placement groove 3 is provided on the outer end surface of the friction plate 2. An infrared rangefinder 4 and a wear detection device 5 are fixed in the wear warning device placement groove 3. The infrared rangefinder 4 is fixed to the bottom end surface of the wear warning device placement groove 3. The wear detection device 5 has a compression spring 51 fixed to the bottom end surface of the wear warning device placement groove 3. The infrared rangefinder 4 is connected to the power supply through the wire through hole 21 located on the friction plate 2;

[0020] like Figure 3 and Figure 4 As shown, one end of the compression spring 51 on the wear detection device 5 is fixedly connected to the bottom surface of the groove 3 where the wear warning device is placed, and the other end is fixedly connected to the fixed ball 52. The ball 53 can roll in the fixed ball 52, and the ball 53 is close to the outer end surface of the friction plate 2.

[0021] During use, when the friction plate 2 is braking, that is, when the friction plate 2 contacts the wheel hub and is worn, that is, the thickness of the friction plate 2 becomes thinner. After wear, the ball 53 on the wear detection device 5 located in the wear warning device placement groove 3 will abut the wheel hub until the wheel hub presses the ball 53 and moves toward the arc-shaped frame 1.

[0022] The infrared rangefinder 4 can detect the distance between the fixed ball 52 and the infrared rangefinder 4 in real time when the friction plate 2 is braked. In this way, the wear degree of the friction plate 2 on the brake pad can be obtained when the entire brake pad is braked, and the data is more intuitive, which is more conducive to user viewing.

[0023] The above description is merely an illustration of the preferred embodiments of the present application and the technical principles employed. The scope of the invention herein is not limited to the technical solutions formed by the specific combination of the aforementioned technical features, but also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A brake pad with wear warning function, comprising an arc-shaped frame (1) and a friction plate (2) connected to each other, wherein the friction plate (2) is fixed on the outer end surface of the arc-shaped frame (1), characterized in that: The friction plate (2) is provided with a groove (3) for placing a wear warning device. An infrared rangefinder (4) and a wear detection device (5) are fixedly provided in the groove (3) for placing the wear warning device. When the friction plate (2) is braked, the infrared rangefinder (4) measures the distance that the wear detection device (5) is pressed by the wheel hub to determine the wear thickness of the friction plate (2).

2. The brake pad with wear warning according to claim 1, characterized in that: The wear detection device (5) comprises a compression spring (51), a fixed ball (52) and a rolling ball (53); one end of the compression spring (51) is fixedly connected to the bottom end surface of the wear warning device placement groove (3); the other end is fixedly connected to the fixed ball (52); and the rolling ball (53) can roll inside the fixed ball (52).

3. The brake pad with wear warning according to claim 2, characterized in that: The ball (53) is adjacent to the outer end surface of the friction plate (2).

4. The brake pad with wear warning according to claim 2, characterized in that: The end surface of the fixed ball (52) is slidably connected to the wear warning device placement groove (3).

5. The brake pad with wear warning according to claim 4, characterized in that: The fixed ball (52) can be replaced with a fixed block.

6. The brake pad with wear warning according to claim 1, characterized in that: The friction plate (2) is provided with a wire passing hole (21).

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