Brake pad wear degree detection device

Abstract

The invention discloses a brake pad wear degree detection device, and relates to the technical field of brake pad wear degree detection, the brake pad wear degree detection device comprises a wear detection assembly arranged on brake calipers of an automobile, the wear detection assembly comprises a blowing and sucking pump machine fixedly connected to the brake calipers, and the air outlet end of the blowing and sucking pump machine is fixedly communicated with an air pipe; the two air outlet ends of the air pipe are each fixedly communicated with an air cover, the two telescopic square pipes are symmetrically and fixedly connected to the brake calipers, and triangular scrapers and detection devices are arranged on the telescopic square pipes; the detection device and the triangular scraping plate are driven to move through the telescopic square pipe, the friction face of the brake pad is detected after chippings are removed, it is guaranteed that detection data are not interfered by the chippings, and the accuracy of abrasion degree detection is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of brake pad wear detection, and specifically to a brake pad wear detection device. Background Technique

[0002] As a key device for vehicle safety monitoring, the optical detection technology system of the brake pad wear detection device is mainly based on two types of sensing principles: the laser ranging sensor calculates the distance between the brake pad and the brake disc through the time difference of the emitted and received light beams, and the camera imaging system analyzes the friction surface morphology characteristics through image processing algorithms. These two non-contact detection methods can achieve millimeter-level accuracy and generate visual wear amount data.

[0003] However, during the actual use of the brake pads, the following interference factors will occur when the brake pads are in frictional contact with the brake disc: the high friction temperature carbonizes the metal debris generated by the wear of the brake pads, forming a conductive particle layer attached to the friction surface. The road impurities (such as sand and dust) stirred up during the braking process are mixed with the metal debris to form composite contaminants on the friction surface. Such foreign objects will cause the laser beam to undergo diffuse reflection or refraction, and at the same time reduce the imaging contrast of the camera, ultimately resulting in errors in the measurement data.

[0004] Therefore, a brake pad wear detection device is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a brake pad wear detection device to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A brake pad wear detection device includes a wear detection component arranged on the brake caliper of an automobile. The wear detection component includes a blowing and suction pump machine fixedly connected to the brake caliper. The air outlet end of the blowing and suction pump machine is fixedly communicated with an air duct. Each of the two air outlet ends of the air duct is fixedly communicated with a wind hood. The wind hood is fixedly connected to the brake caliper. It also includes two air delivery grooves I opened on the brake caliper. The two wind hoods are respectively communicated with the two air delivery grooves I. It further includes two symmetrically fixedly connected telescopic square tubes on the brake caliper. The telescopic square tube includes a fixed end and a telescopic end. The fixed end of the telescopic square tube is fixedly connected to the brake caliper. An airbag is arranged inside the telescopic square tube. Both ends of the airbag are fixedly connected to the telescopic end and the fixed end of the telescopic square tube respectively. The airbag is communicated with the adjacent air delivery groove I. The telescopic end of the telescopic square tube is fixedly connected to a rotating shaft. A triangular scraper is rotatably connected to the rotating shaft. A torsion spring is arranged between the triangular scraper and the adjacent rotating shaft. The telescopic end of the telescopic square tube is fixedly connected to a detection device. It also includes two shelves fixedly arranged on the brake caliper.

[0007] Further, the wear detection component further includes two air delivery grooves II opened on the brake caliper. The two air delivery grooves II are respectively communicated with the two air hoods. The telescopic end of the telescopic square tube is further fixedly connected with a support rod. A trachea is fixedly connected to the support rod. An inclined air duct housing is fixedly connected to the side of the support rod away from the trachea. The end of the trachea away from the support rod is communicated with the adjacent air delivery groove II, and the end of the trachea close to the support rod is communicated with the adjacent inclined air duct housing.

[0008] Further, a first spring is arranged inside the telescopic square tube. The two ends of the first spring are respectively fixedly connected with the fixed end and the telescopic end of the telescopic square tube.

[0009] Further, a plurality of first springs are arranged inside each telescopic square tube.

[0010] Further, the inclined air duct housing is arranged obliquely, and the air outlet end of the inclined air duct housing faces the adjacent triangular scraping plate.

[0011] Further, the trachea is made of rubber material.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The detection device and the triangular scraping plate are driven to move by the telescopic square tube. After the debris is removed, the friction surface of the brake pad is detected, ensuring that the detection data is not interfered by the debris and significantly improving the accuracy of the wear degree detection. The traditional detection method of the brake pad wear degree is affected by the debris on the surface of the brake pad, resulting in inaccurate detection data. This device effectively solves this interference problem by first removing the debris and then performing the detection.

[0013] Meanwhile, during the detection process, the telescopic square tube is fully extended and covers one side of the friction surface of the brake pad, which can prevent foreign impurities from entering, reduce the interference of foreign impurities on the detection effect, ensure the accuracy of detecting the wear degree of the brake pad, and reduce the risk of being affected by external factors during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention from the first perspective; Figure 2 is a schematic diagram of the overall structure of the present invention from the second perspective; Figure 3 is a three-dimensional schematic diagram of the shelf, air hood and other structures of the present invention; Figure 4 is the present invention Figure 3 The enlarged schematic diagram at position A; Figure 5 is the present invention Figure 4 The enlarged schematic diagram at position B; Figure 6 is the present invention Figure 4 The enlarged schematic diagram at position C; Figure 7 Schematic three-dimensional view of the telescopic square tube, airbag and other structures of the present invention; Figure 8 For the present invention Figure 7 Enlarged view at D in; Figure 9 Schematic three-dimensional view of the telescopic square tube, spring one and other structures of the present invention; Figure 10 For the present invention Figure 9 Enlarged view at E in; Figure 11 For the present invention Figure 10 Enlarged view at F in.

[0015] In the figure: 11, brake disc; 12, brake caliper; 13, brake pad; 21, blowing and suction pump; 22, air duct; 23, air hood; 24, first air delivery groove; 25, second air delivery groove; 26, telescopic square tube; 27, airbag; 28, first spring; 29, rotating shaft; 210, triangular scraper; 211, torsion spring; 212, detection device; 213, support rod; 214, air pipe; 215, inclined air duct housing; 216, shelf. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Embodiments provided by the present invention: As Figures 1 to 11 shown, a brake pad wear detection device includes a wear detection component disposed on the brake caliper 12 of an automobile. It should be noted that both sides of the inner wall of the brake caliper 12 are connected with a brake pad 13 through hydraulic rods. The two brake pads 13 are respectively located on both sides of the brake disc 11. The brake disc 11, the brake caliper 12 and the brake pad 13 are all known technologies in the prior art and will not be elaborated here.

[0018] It should be noted that: the brake disc 11 rotates as the vehicle travels, and the brake caliper 12 and the brake pads 13 thereon do not rotate.

[0019] The wear detection assembly includes a blowing and suction pump 21 fixedly connected to the brake caliper 12. The air outlet end of the blowing and suction pump 21 is fixedly communicated with an air duct 22, and the air inlet end of the blowing and suction pump 21 is communicated with the outside. The two air outlet ends of the air duct 22 extend towards the two brake pads 13 respectively. Each of the two air outlet ends of the air duct 22 is fixedly communicated with an air hood 23, and the air hood 23 is fixedly connected to the brake caliper 12. It also includes two air delivery grooves one 24 and two air delivery grooves two 25 opened on the brake caliper 12. Each air hood 23 is communicated with an air delivery groove one 24 and an air delivery groove two 25. It further includes two symmetrically fixedly connected telescopic square pipes 26 on the brake caliper 12. The two telescopic square pipes 26 are respectively located on both sides of the brake disc 11. The telescopic square pipe 26 includes a fixed end and a telescopic end. The fixed end of the telescopic square pipe 26 is fixedly connected to the brake caliper 12. The telescopic ends of the two telescopic square pipes 26 all face the adjacent brake pads 13. An airbag 27 is arranged inside each of the two telescopic square pipes 26. The two ends of the airbag 27 are respectively fixedly connected to the inner walls of the telescopic end and the fixed end of the telescopic square pipe 26. The airbag 27 is communicated with the adjacent air delivery groove one 24. A plurality of first springs 28 are arranged inside each of the two telescopic square pipes 26. The two ends of the first spring 28 are respectively fixedly connected to the inner walls of the telescopic end and the fixed end of the telescopic square pipe 26. A rotating shaft 29 is fixedly connected to the telescopic end of the telescopic square pipe 26. A triangular scraping plate 210 is rotatably connected to the rotating shaft 29. A torsion spring 211 is arranged between the triangular scraping plate 210 and the adjacent rotating shaft 29. A detection device 212 is fixedly connected to the side of the telescopic end of the telescopic square pipe 26 facing the adjacent brake pad 13.

[0020] A support rod 213 is fixedly connected to the side of the telescopic end of the telescopic square pipe 26 close to the brake disc 11. An air pipe 214 is fixedly connected to the support rod 213. An inclined air duct housing 215 is fixedly connected to the side of the support rod 213 away from the air pipe 214. The end of the air pipe 214 away from the support rod 213 is communicated with the adjacent air delivery groove two 25. The end of the air pipe 214 close to the support rod 213 is communicated with the adjacent inclined air duct housing 215. It also includes two shelves 216 symmetrically arranged on the inner side wall of the brake caliper 12. The two shelves 216 are respectively located on both sides of the brake disc 11. The shelves 216 are arranged corresponding to the positions of the adjacent brake pads 13.

[0021] Among them: The blowing and suction pump 21 and the detection device 212 are both electrically connected to the vehicle controller. When it is necessary to detect the wear degree of the brake pad 13, the blowing and suction pump 21 and the detection device 212 are started through the controller, so that the blowing and suction pump 21 blows air into the air duct 22. The detection end of the detection device 212 faces the friction surface of the brake pad 13. The wear condition of the brake pad 13 detected by the detection device 212 can be received by the vehicle control system.

[0022] It should be added that: a laser ranging system and a camera imaging system are integrated on the detection device 212. The laser ranging system calculates the distance between the brake pad 13 and the brake disc 11 through the time difference of emitting and receiving light beams, and the camera imaging system analyzes the morphological characteristics of the friction surface through an image processing algorithm. Both the laser ranging system and the camera imaging system are existing technologies and will not be elaborated here.

[0023] As Figure 5 shown, the side of the triangular scraper 210 away from the rotating shaft 29 is triangularly arranged, and the triangular scraper 210 is fitted to the friction surface of the brake pad 13. The pointed part of the triangle of the triangular scraper 210 can scrape off the debris on the friction surface of the brake pad 13 as the triangular scraper 210 moves.

[0024] The triangular scraper 210 is made of a high-temperature resistant rubber material, such as fluororubber or silicone rubber material, which has the characteristic of remaining elastic at high temperatures, enabling the triangular scraper 210 to adapt to the uneven friction surface of the worn brake pad 13 and ensuring that the triangular scraper 210 can remain in contact with the friction surface of the brake pad 13.

[0025] Among them: the torsion spring 211 is always in an elastic deformation state, enabling the triangular scraper 210 to remain in contact with the brake pad 13, avoiding the situation that the contact state between the triangular scraper 210 and the brake pad 13 is affected by the wear of the friction surface of the brake pad 13, and ensuring that the triangular scraper 210 can scrape off the debris on the friction surface of the brake pad 13.

[0026] The extendable range of the telescopic square tube 26 is adapted to the size of the brake pad 13, that is, as the telescopic square tube 26 extends, the telescopic square tube 26 can completely cover the brake pad 13.

[0027] The air pipe 214 is made of rubber material and has the characteristic of being soft and deformable, that is, when the telescopic square tube 26 expands and contracts, it can drive the air pipe 214 to deform adaptively.

[0028] As Figure 4 、 Figure 5 and Figure 11 shown, when the brake pad 13 is not in use, the side of the shelf 216 close to the brake disc 11 and the side of the brake pad 13 close to the brake disc 11 are on the same plane (they are not on the same plane after the brake pad 13 is worn). The shelf 216 can limit the triangular scraper 210. When the triangular scraper 210 is not in contact with the brake pad 13, it makes the triangular scraper 210 contact with the shelf 216, preventing the torsion spring 211 from fully elastically resetting and ensuring that the torsion spring 211 is in an elastic deformation state, facilitating the telescopic square tube 26 to drive the triangular scraper 210 to scrape off the debris on the surface of the brake pad 13.

[0029] As Figure 5As shown, the inclined air duct housing 215 is inclined, and the air outlet end of the inclined air duct housing 215 faces the adjacent triangular scraper 210, so that the gas blown out by the inclined air duct housing 215 can blow off the debris scraped by the triangular scraper 210. With the scraping of the triangular scraper 210, the debris on the friction surface of the brake pad 13 can be better removed.

[0030] In the initial state of the wear detection assembly, when the vehicle does not use the brake, the brake pad 13 is not in contact with the brake disc 11, the output end of the hydraulic rod connected to the brake pad 13 does not extend and is in a fully retracted state, the blowing and suction pump 21 does not blow air into the air duct 22, the airbag 27 is in a contracted state, the telescopic square tube 26 is in a fully retracted state, the first spring 28 does not produce elastic deformation, and the triangular scraper 210 is in contact with the shelf 216. At this time, the structures provided on the telescopic square tube 26 are not located on the moving path of the brake pad 13 and will not interfere with the frictional cooperation between the brake pad 13 and the brake disc 11.

[0031] When the vehicle is not running and the brake pad 13 is not in contact with the brake disc 11, the wear degree of the friction surface of the brake pad 13 can be detected by the wear detection assembly. At this time, the blowing and suction pump 21 and the detection device 212 are started through the vehicle controller. The blowing and suction pump 21 blows air into the air duct 22, and the gas flows into the two air hoods 23 through the air duct 22. The gas flows into the first air delivery groove 24 and the second air delivery groove 25 inside the air hood 23 at the same time. The gas flows inside the first air delivery groove 24, causing the airbag 27 to gradually inflate and expand. As the airbag 27 inflates and expands, the airbag 27 pushes the telescopic end of the telescopic square tube 26 to move towards the brake pad 13, and at the same time, the first spring 28 is elastically stretched. While the telescopic end of the telescopic square tube 26 moves, the triangular scraper 210 is driven to move synchronously, so that the triangular scraper 210 is driven to contact and resist the brake pad 13. At this time, as the triangular scraper 210 continues to move, the debris generated on the friction surface of the brake pad 13 due to wear is scraped off by the triangular tip of the triangular scraper 210. At the same time, as the triangular scraper 210 moves, the gas inside the second air delivery groove 25 flows into the air pipe 214, and the gas inside the air pipe 214 is ejected from the air outlet end of the inclined air duct housing 215 towards the triangular tip of the triangular scraper 210, so that the debris scraped by the triangular scraper 210 is blown away from the triangular scraper 210, ensuring that too much debris does not adhere to the triangular tip of the triangular scraper 210 and affecting the cleaning effect. At the same time, it can also blow air to the brake pad 13 at the front end in the moving direction of the triangular scraper 210 to remove debris, and remove the debris that is not firmly adsorbed on the friction surface of the brake pad 13 in advance, assisting in improving the cleaning effect of the triangular scraper 210 during the moving process.

[0032] As the telescopic end of the telescopic square tube 26 moves, the telescopic square tube 26 drives the detection device 212 to move synchronously, so that the detection device 212 detects the friction surface of the brake pad 13 after the debris is removed. When the telescopic end of the telescopic square tube 26 is fully extended, the detection device 212 can complete the detection of the entire friction surface of the brake pad 13. The laser ranging system of the detection device 212 calculates the distance between the brake pad 13 and the brake disc 11 through the time difference of transmitting and receiving the light beam, and the camera imaging system of the detection device 212 analyzes the morphological characteristics of the friction surface through the image processing algorithm. Then, the data obtained from this measurement is compared with the initially recorded thickness data to detect the thickness of the brake pad 13, and the wear condition of the friction surface of the brake pad 13 is transmitted to the vehicle control system. If the wear is excessive, a signal is sent to the driver through the vehicle control system, so that the driver can know in time whether the brake pad 13 needs to be replaced.

[0033] When the wear detection component needs to be reset after the detection is completed, at this time, the controller makes the air blowing and suction pump 21 pump the gas inside the air duct 22 outwards, so that the airbag 27 quickly contracts. Combined with the elastic reset function of multiple first springs 28, the telescopic end of the telescopic square tube 26 can be quickly reset to the fully contracted state, so that the telescopic square tube 26 and its upper structure will not affect the cooperation between the brake pad 13 and the brake disc 11. At this time, the wear detection component is completely reset, and the air blowing and suction pump 21 stops operating and no longer sucks air.

[0034] During the operation of the above wear detection component, the detection device 212 is driven by the telescopic square tube 26 to move, and the friction surface of the brake pad 13 is detected after the debris is removed, ensuring that the detection data is not interfered by the debris and significantly improving the accuracy of the wear degree detection. The traditional wear degree detection method of the brake pad 13 is affected by the debris on the surface of the brake pad 13, resulting in inaccurate detection data. This device effectively solves this interference problem by removing the debris first and then performing the detection.

[0035] At the same time, during the detection process, the telescopic square tube 26 is fully extended and covers one side of the friction surface of the brake pad 13, which can prevent foreign impurities from entering, reduce the interference of foreign impurities on the detection effect, ensure the accuracy of detecting the wear degree of the brake pad 13, and reduce the risk of being affected by external factors during the detection process.

[0036] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake pad wear detection device, characterized in that: It includes a wear detection component arranged on the brake caliper (12) of an automobile. The wear detection component includes a blowing and suction pump (21) fixedly connected to the brake caliper (12). The air outlet end of the blowing and suction pump (21) is fixedly communicated with an air duct (22). Each of the two air outlet ends of the air duct (22) is fixedly communicated with a wind hood (23). The wind hood (23) is fixedly connected to the brake caliper (12). It also includes two air inlet grooves one (24) opened on the brake caliper (12). The two wind hoods (23) are respectively communicated with the two air inlet grooves one (24). It further includes two symmetrically fixedly connected telescopic square pipes (26) on the brake caliper (12). The telescopic square pipe (26) includes a fixed end and a telescopic end. The fixed end of the telescopic square pipe (26) is fixedly connected to the brake caliper (12). An airbag (27) is arranged inside the telescopic square pipe (26). The two ends of the airbag (27) are respectively fixedly connected to the telescopic end and the fixed end of the telescopic square pipe (26). The airbag (27) is communicated with the adjacent air inlet groove one (24). A rotating shaft (29) is fixedly connected to the telescopic end of the telescopic square pipe (26). A triangular scraper (210) is rotatably connected to the rotating shaft (29). A torsion spring (211) is arranged between the triangular scraper (210) and the adjacent rotating shaft (29). A detection device (212) is fixedly connected to the telescopic end of the telescopic square pipe (26). It also includes two shelves (216) fixedly arranged on the brake caliper (12).

2. The brake pad wear detection device according to claim 1, characterized in that: The wear detection component also includes two air inlet grooves two (25) opened on the brake caliper (12). The two air inlet grooves two (25) are respectively communicated with the two wind hoods (23). A support rod (213) is also fixedly connected to the telescopic end of the telescopic square pipe (26). An air pipe (214) is fixedly connected to the support rod (213). An inclined air duct shell (215) is fixedly connected to the side of the support rod (213) away from the air pipe (214). The end of the air pipe (214) away from the support rod (213) is communicated with the adjacent air inlet groove two (25). The end of the air pipe (214) close to the support rod (213) is communicated with the adjacent inclined air duct shell (215).

3. A brake pad wear detection device according to claim 1, characterized in that: A first spring (28) is arranged inside the telescopic square pipe (26). The two ends of the first spring (28) are respectively fixedly connected to the fixed end and the telescopic end of the telescopic square pipe (26).

4. A brake pad wear detection device according to claim 3, characterized in that: A plurality of first springs (28) are arranged inside each telescopic square pipe (26).

5. The brake pad wear detection device according to claim 2, wherein: The inclined air duct shell (215) is inclined. The air outlet end of the inclined air duct shell (215) faces the adjacent triangular scraper (210).

6. The brake pad wear detection device according to claim 2, characterized in that: The air pipe (214) is made of rubber material.

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