A device for detecting the wear degree of brake pads

Abstract

The present invention discloses a brake pad wear detection device, which relates to the technical field of brake pad wear detection. It 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. It also includes two symmetrically fixedly connected telescopic square pipes on the brake caliper. A triangular scraping plate and a detection device are arranged on the telescopic square pipe. The detection device and the triangular scraping plate are driven to move by the telescopic square pipe, and the friction surface of the brake pad is detected after the debris is removed, ensuring that the detection data is not interfered by the debris and significantly improving the accuracy of wear detection.

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 technical 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-received light beam, 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, forming composite pollutants 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 also 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. The two ends of the airbag are respectively fixedly connected to the telescopic end and the fixed end of the telescopic square tube. The airbag is communicated with the adjacent air delivery groove I. A rotating shaft is fixedly connected to the telescopic end of the telescopic square tube. A triangular scraping plate is rotatably connected to the rotating shaft. A torsion spring is arranged between the triangular scraping plate and the adjacent rotating shaft. A detection device is fixedly connected to the telescopic end of the telescopic square tube. It also includes two shelves fixedly arranged on the brake caliper.

[0007] Further, the wear detection component further includes two air ducts II opened on the brake caliper. The two air ducts II are respectively communicated with the two wind covers. The telescopic end of the telescopic square tube is also fixedly connected with a support rod. A trachea is fixedly connected to the support rod. An inclined air duct shell 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 duct II, and the end of the trachea close to the support rod is communicated with the adjacent inclined air duct shell.

[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 shell is inclined, and the air outlet end of the inclined air duct shell faces the adjacent triangular scraper.

[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:

[0013] The detection device and the triangular scraper are driven to move by the telescopic square tube, and the friction surface of the brake pad is detected after the debris is removed, ensuring that the detection data is not interfered by the debris and significantly improving the accuracy of wear degree detection. The traditional method for detecting the wear degree of brake pads is affected by the debris on the surface of the brake pads, resulting in inaccurate detection data. This device effectively solves this interference problem by first removing the debris and then performing the detection.

[0014] 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 and reduce the interference of foreign impurities on the detection effect, ensuring the accuracy of detecting the wear degree of the brake pad and reducing the risk of being affected by external factors during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention from the first perspective;

[0016] Figure 2 It is a schematic diagram of the overall structure of the present invention from the second perspective;

[0017] Figure 3 It is a three-dimensional schematic diagram of the shelf, wind cover and other structures of the present invention;

[0018] Figure 4 For the present invention Figure 3 The enlarged schematic diagram at A in;

[0019] Figure 5 For the present invention Figure 4 The enlarged schematic diagram at B in;

[0020] Figure 6 For the present invention Figure 4 Schematic enlarged view at position C in the present invention;

[0021] Figure 7 Schematic perspective view of the telescopic square tube, airbag and other structures of the present invention;

[0022] Figure 8 For the present invention Figure 7 Schematic enlarged view at position D in the present invention;

[0023] Figure 9 Schematic perspective view of the telescopic square tube, spring I and other structures of the present invention;

[0024] Figure 10 For the present invention Figure 9 Schematic enlarged view at position E in the present invention;

[0025] Figure 11 For the present invention Figure 10 Schematic enlarged view at position F in the present invention.

[0026] In the figure:

[0027] 11, brake disc; 12, brake caliper; 13, brake pad;

[0028] 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, spring I; 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

[0029] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiments provided by the present invention:

[0031] 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 a hydraulic rod, and 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.

[0032] It should be noted that: the brake disc 11 rotates as the vehicle travels, while the brake caliper 12 and the brake pads 13 thereon do not rotate.

[0033] 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. 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 a wind hood 23. The wind 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 wind 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 tubes 26 on the brake caliper 12. The two telescopic square tubes 26 are respectively located on both sides of the brake disc 11. The telescopic square tube 26 includes a fixed end and a telescopic end. The fixed end of the telescopic square tube 26 is fixedly connected to the brake caliper 12. The telescopic ends of the two telescopic square tubes 26 all face the adjacent brake pads 13. An airbag 27 is arranged inside each of the two telescopic square tubes 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 tube 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 tubes 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 tube 26. A rotating shaft 29 is fixedly connected to the telescopic end of the telescopic square tube 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 tube 26 facing the adjacent brake pad 13.

[0034] A support rod 213 is fixedly connected to the side of the telescopic end of the telescopic square tube 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 symmetrically arranged shelves 216 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.

[0035] 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 pads 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, and the detection end of the detection device 212 faces the friction surface of the brake pads 13. The wear condition of the brake pads 13 detected by the detection device 212 can be received by the vehicle control system.

[0036] It should be added that: The detection device 212 is integrated with a laser ranging system and a camera imaging system. The laser ranging system calculates the distance between the brake pads 13 and the brake disc 11 through the time difference of emitting and receiving light beams, and the camera imaging system analyzes the topographic features 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.

[0037] 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 and adapted to the friction surface of the brake pads 13. The triangular tip part of the triangular scraper 210 can scrape off the debris on the friction surface of the brake pads 13 as the triangular scraper 210 moves.

[0038] 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 pads 13 and ensuring that the triangular scraper 210 can remain in contact with the friction surface of the brake pads 13.

[0039] 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 pads 13, avoiding the situation that the contact state between the triangular scraper 210 and the brake pads 13 is affected by the wear of the friction surface of the brake pads 13, and ensuring that the triangular scraper 210 can scrape off the debris on the friction surface of the brake pads 13.

[0040] The extendable range of the telescopic square tube 26 is adapted to the size of the brake pads 13, that is, as the telescopic square tube 26 extends, the telescopic square tube 26 can completely cover the brake pads 13.

[0041] 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.

[0042] As Figure 4 、 Figure 5 and Figure 11As 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 does not fit with the brake pad 13, it makes the triangular scraper 210 fit with the shelf 216, preventing the torsion spring 211 from fully elastically resetting and ensuring that the torsion spring 211 is in an elastically deformed state, which is convenient for the telescopic square tube 26 to drive the triangular scraper 210 to scrape the debris on the surface of the brake pad 13.

[0043] As Figure 5 shown, the inclined air duct shell 215 is inclined, and the air outlet end of the inclined air duct shell 215 faces the adjacent triangular scraper 210, so that the gas blown out by the inclined air duct shell 215 can blow off the debris scraped by the triangular scraper 210. Cooperating with the scraping of the triangular scraper 210, the debris on the friction surface of the brake pad 13 can be better removed.

[0044] In the initial state of the wear detection assembly, the vehicle does not use the brake, the brake pad 13 does not fit 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 air blowing and suction pump 21 does not blow air into the air duct 22, the airbag 27 is in a retracted state, the telescopic square tube 26 is in a fully retracted state, the first spring 28 does not generate elastic deformation, and the triangular scraper 210 fits with the shelf 216. At this time, each structure arranged on the telescopic square tube 26 is not 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.

[0045] When the vehicle is not running and the brake pads 13 are not in contact with the brake discs 11, the wear detection component can detect the wear degree of the friction surface of the brake pads 13. At this time, the controller of the vehicle starts the air blowing and suction pump 21 and the detection device 212. The air blowing and suction pump 21 blows air into the air duct 22, and the gas flows through the air duct 22 into the two air hoods 23. 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 flowing in the first air delivery groove 24 causes 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 pads 13, and at the same time causes the first spring 28 to be 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 pads 13. At this time, as the triangular scraper 210 continues to move, the debris generated by wear on the friction surface of the brake pads 13 is scraped off by the triangular tip of the triangular scraper 210. At the same time, as the triangular scraper 210 moves, the gas in the second air delivery groove 25 flows into the air pipe 214, and the gas in 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 off 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 affect the cleaning effect. At the same time, it can also blow air to the brake pads 13 at the front end of 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 pads 13 in advance, assisting in improving the cleaning effect of the triangular scraper 210 during the moving process.

[0046] 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 pads 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 pads 13. The laser ranging system of the detection device 212 calculates the distance between the brake pads 13 and the brake discs 11 through the time difference of transmitting and receiving light beams, and the camera imaging system of the detection device 212 analyzes the morphological characteristics of the friction surface through image processing algorithms. Then, the data measured this time is compared with the initially recorded thickness data to detect the thickness of the brake pads 13, and the wear condition of the friction surface of the brake pads 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 timely know whether the brake pads 13 need to be replaced.

[0047] When the wear detection component needs to be reset after the detection is completed, at this time, the controller causes the blowing and suction pump 21 to pump the gas inside the air duct 22 outwards, so that the airbag 27 quickly contracts, and 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 the structures thereon 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 blowing and suction pump 21 stops operating and no longer sucks air.

[0048] During the operation of the above wear detection component, the detection device 212 is driven to move by the telescopic square tube 26. After the debris is removed, the friction surface of the brake pad 13 is detected, which ensures that the detection data is not interfered by the debris and significantly improves the accuracy of the wear degree detection. The traditional method for detecting the wear degree 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 first removing the debris and then performing the detection.

[0049] 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.

[0050] It should be noted that in this article, 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. 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 the vehicle. 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 delivery grooves one (24) opened on the brake caliper (12). The two wind hoods (23) are respectively communicated with the two air delivery grooves one (24). It further includes two symmetrically fixedly connected telescopic square tubes (26) on the brake caliper (12). The telescopic square tube (26) includes a fixed end and a telescopic end. The fixed end of the telescopic square tube (26) is fixedly connected to the brake caliper (12). An airbag (27) is arranged inside the telescopic square tube (26). The two ends of the airbag (27) are respectively fixedly connected to the telescopic end and the fixed end of the telescopic square tube (26). The airbag (27) is communicated with the adjacent air delivery groove one (24). A rotating shaft (29) is fixedly connected to the telescopic end of the telescopic square tube (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 telescopic end of the telescopic square tube (26). It also includes two shelves (216) fixedly arranged on 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). 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. The shelf (216) can limit the triangular scraping plate (210).

2. The brake pad wear detection device according to claim 1, characterized in that: The wear detection component also includes two air delivery grooves two (25) opened on the brake caliper (12). The two air delivery 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 tube (26). An air tube (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 tube (214). The end of the air tube (214) away from the support rod (213) is communicated with the adjacent air delivery groove two (25). The end of the air tube (214) close to the support rod (213) is communicated with the adjacent inclined air duct shell (215).

3. The brake pad wear detection device according to claim 1, characterized in that: A first spring (28) is arranged inside the telescopic square tube (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 tube (26).

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

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

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

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