Brake pad multiple detection device

Abstract

The invention belongs to the technical field of brake pad detection, and particularly relates to a brake pad multiple detection device. Comprising a three-coordinate measuring instrument body. The three-coordinate measuring instrument body is provided with a detection auxiliary assembly. A mounting bin is mounted on the three-coordinate measuring instrument body; a convex block is arranged in the mounting bin; the two sides of the convex block are each provided with two ejector rods. The top of the ejector rod is fixedly connected with a fan-shaped block; an arc-shaped plate is fixedly connected to the fan-shaped block; a U-shaped plate is arranged on the side, away from the convex block, of the ejector rod. A plurality of rollers are arranged in the U-shaped plate in a unidirectional rotation manner; a first electric push rod is arranged on each mounting bin; a liquid cylinder is arranged below each ejector rod; the ejector rod extends into the liquid cylinder; piston discs are connected into the liquid cylinders in a sliding manner; a liquid bin is fixedly connected to the lower portion of the convex block. According to the brake pad detection device, the installation bin and the detection auxiliary assembly are arranged, so that the situation that detection data are seriously distorted and misjudgment occurs when an inclined brake pad is detected can be avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of brake pad detection, and specifically relates to a multi-detection device for brake pads. Background Art

[0002] Due to its high-precision characteristics, the coordinate measuring machine has become one of the commonly used devices for detecting the flatness of brake pads. The coordinate measuring machine contacts the surface of the brake pad through a probe, collects three-dimensional coordinate points, and then generates a surface profile by software and calculates the flatness error. Its principle is based on a spatial rectangular coordinate system, and by using the movement and feedback of the probe head, the coordinate values of each point of the object to be measured are accurately measured, so as to realize the detection of parameters such as flatness and form and position tolerances. During the detection process of brake pads, theoretically, accurate flatness data can be obtained by measuring multiple points on the surface of the brake pad, providing a basis for product quality evaluation.

[0003] Since the brake pad backplate is produced by a casting process, during the casting process, due to factors such as mold accuracy, pouring temperature, and uneven cooling speed, local inclination may occur on the backplate. When using a coordinate measuring machine for detection, when the probe contacts the inclined area of the backplate, the position where the probe is triggered will shift due to the surface inclination, resulting in a deviation in the measured height value.

[0004] In actual detection operations, if the detection personnel fail to place the brake pad accurately and horizontally on the measurement platform, causing the brake pad to be in an inclined state as a whole, it will seriously interfere with the detection results, resulting in large deviations in the detection results. It may misjudge a qualified product as unqualified, or cover up the quality problems of unqualified products, leading to defective products flowing into the market and bringing serious safety hazards.

[0005] Whether it is local inclination of the brake pad backplate or placement inclination, it will cause serious distortion of the detection data. In contact measurement, the deviation of the probe trajectory will misjudge the Z-axis coordinate, which will not only cause cost waste due to misjudging a qualified product as a waste product, or cause braking safety hazards due to unqualified products flowing into the market, but also interfere with the later friction performance test results, making key indicators such as friction coefficient and heat fade lose their reference value, and ultimately affecting the effectiveness and reliability of brake pad quality control. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve the above technical problems, the present invention proposes a multi-detection device for brake pads. By setting an installation bin and a detection auxiliary component, it can avoid the situation of serious distortion of detection data and misjudgment when detecting inclined brake pads. The technical solution of the present invention is as follows: A multi-detection device for brake pads, including a coordinate measuring machine body, on which a detection auxiliary component is installed; an installation bin is installed on the coordinate measuring machine body; a convex block is arranged in the installation bin, and the convex block is fixedly installed at the bottom of the inner cavity of the installation bin; Two ejector rods are arranged on both sides of the convex block, and the ejector rods pass through the installation bin and are slidably connected with the installation bin; the top of the ejector rod is a hemispherical surface; A sector block is fixedly connected to the top of the ejector rod; an arc plate is fixedly connected to the sector block, and the four arc plates are used for limiting the brake pads; Semicircular grooves are opened on the surface of one end of the convex block facing the ejector rod, and the ejector rods are all slid in the semicircular grooves; a U-shaped plate is arranged on the side of the ejector rod away from the convex block; a plurality of rollers are rotatably installed in the U-shaped plate in a one-way manner, and the rollers are in contact with the ejector rod and can only rotate downward in a one-way manner; A first electric push rod is arranged on the installation bin, and the extension rod of the first electric push rod is fixedly connected to the U-shaped plate; Liquid cylinders are arranged below the ejector rods; the ejector rods extend into the liquid cylinders; a piston disc is slidably connected in each liquid cylinder, and the piston disc is fixedly connected to the ejector rod; liquid is filled below the piston disc; a spring is connected between the piston disc and the liquid cylinder; A liquid storage bin is fixedly connected below the convex block, and the four liquid cylinders are all communicated with the liquid storage bin through liquid pipes; electromagnetic flowmeters are installed on the four liquid pipes, and the electromagnetic flowmeters are connected to a computer, and the computer monitors the numerical changes of the electromagnetic flowmeters.

[0007] As a preferred embodiment of the present invention, the coordinate measuring machine body includes a base; a cross beam is slidably installed on the base; a carriage slides on the cross beam; a probe head seat slides up and down in the carriage; a probe is installed at the bottom of the probe head seat; The installation bin is installed on the base; the brake pad is composed of a back plate and a friction lining; The detection auxiliary component includes a sliding disc; the sliding disc slides on the probe head seat and is perpendicular to the probe head seat and the probe; a second electric push rod is installed on the probe head seat, and the extension rod of the second electric push rod is fixedly connected to the sliding disc; Long grooves are opened at the four corners of the probe head seat, and the cross section of the long groove is C-shaped; four round rods are fixedly connected to the top of the sliding disc, and the round rods are all slid in the long grooves; An annular groove is opened on the outer circumferential surface of the sliding disc; an annular plate is slidably connected in the annular groove; tooth grooves are opened on the top surface of the annular plate along the circumferential direction and are evenly distributed; A servo motor is installed on the top of the sliding disc; a gear is installed on the servo motor, and the gear partially extends into the sliding disc and meshes with the tooth groove; A guide rod is fixedly connected below the annular plate and is uniformly arranged; the bottom of the guide rod is fixedly connected with a rotating plate, and the rotating plate is parallel to the probe.

[0008] As a preferred embodiment of the present invention, a rubber layer is fixedly connected to the outer surface of the roller.

[0009] As a preferred embodiment of the present invention, anti-slip lines are provided on the outer surface of the rubber layer.

[0010] As a preferred embodiment of the present invention, T-shaped rods are slidably connected to the four arc-shaped plates, and springs are connected between the T-shaped rods and the arc-shaped plates. Under the pulling force of the springs, the T-shaped rods will contact the side surface of the back plate.

[0011] As a preferred embodiment of the present invention, a semi-circular block is fixedly connected to one side of the T-shaped rod passing through the arc-shaped plate; a sphere is rotated in the semi-circular block, and the sphere contacts the side surface of the back plate and presses the back plate.

[0012] As a preferred embodiment of the present invention, a suction cup is provided above the sector block, and the suction cup is fixedly connected to the top rod; An air groove is provided in the top rod, and the top of the air groove is communicated with the inner cavity of the suction cup, and the bottom of the air groove is communicated with the space above the piston disc.

[0013] As a preferred embodiment of the present invention, an air cavity is provided in the annular plate; an annular air duct is provided on the annular plate above the air cavity; A connecting pipe is installed above the sliding disc, and the connecting pipe extends to the surface of the annular plate and is communicated with the annular air duct; the connecting pipe is communicated with an external air compressor through a conduit; The guide rod is a cylindrical structure and is communicated with the air cavity; an air chamber is provided inside the rotating plate; inclined grooves are provided on both sides of the rotating plate, and the inclined grooves are communicated with the air chamber.

[0014] As a preferred embodiment of the present invention, a ball is rotatably connected to the bottom of the rotating plate.

[0015] As a preferred embodiment of the present invention, notches are provided on the sliding disc on the left and right sides of the probe holder; A straight rod is rotatably connected to the notch through a torsion spring and a rotating shaft. In the initial state, the straight rod is located in the notch under the block of the probe holder; a brush is fixedly connected to the bottom of the straight rod.

[0016] The beneficial effects of the present invention are as follows: 1. A multiple detection device for brake pads according to the present invention utilizes a rotating plate to contact the brake pad and controls the cyclic rotation of the brake pad. During the cyclic rotation of the rotating plate, it will gradually contact different positions of the brake pad. If the surface of the brake pad is in an inclined state, since the plane formed during the rotation of the rotating plate is perpendicular to the probe, the rotating plate will push down the inclined position on the surface of the brake pad and adjust the inclined state of the brake pad surface. When the surface of the brake pad fits the plane formed during the rotation of the rotating plate, the brake pad and the probe are in a perpendicular state at this time, thus avoiding the situation where the detection data is severely distorted and misjudgment occurs when detecting an inclined brake pad.

[0017] 2. A multiple detection device for brake pads according to the present invention, when the brake pad is squeezed by the rotating plate, it will push the corresponding ejector rod downward. The downward-moving ejector rod will push the piston disk downward. When the piston disk moves downward, it will push the liquid through the electromagnetic flowmeter, and the numerical change on the electromagnetic flowmeter will be displayed on the computer. Therefore, during the rotation of the rotating plate, if the values on multiple electromagnetic flowmeters do not change, at this time, the surface of the brake pad completely fits the plane formed during the rotation of the rotating plate. Thus, it is possible to judge whether the brake pad fits the plane formed during the rotation of the rotating plate by observing the numerical change of the electromagnetic flowmeter, preventing the rotating plate from stopping rotating when the brake pad does not fit the plane formed during the rotation of the rotating plate, resulting in the brake pad still being in an inclined state after being adjusted by the rotating plate.

[0018] 3. A multiple detection device for brake pads according to the present invention, when using the probe to detect the brake pad, the computer is used to monitor the values of multiple electromagnetic flowmeters at the same time. Since the values on the electromagnetic flowmeters are unchanged at this time, if the value on a certain electromagnetic flowmeter changes during the detection process, it means that the position of the brake pad has changed. Therefore, the rotating plate can be controlled to move downward again and rotate along the brake pad to adjust the inclined state of the brake pad surface. During this process, it can be prevented that when the probe detects the brake pad, due to contact measurement, the brake pad will be affected by the force of the probe. If the brake pad tilts under the force, it can be monitored, thus avoiding the situation where the tilt of the brake pad cannot be detected, which will affect the detection result of the brake pad. Brief Description of the Drawings

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is the state diagram of the three-coordinate measuring instrument of the present invention in the initial state; Figure 2 is the state diagram of the three-coordinate measuring instrument of the present invention when adjusting the brake pad; Figure 3 is the structural diagram of the detection auxiliary component and the probe holder in the present invention; Figure 4 It is the internal structure diagram of the installation bin in the present invention; Figure 5 It is the top view of the coordinate measuring machine in the present invention; Figure 6 It is the present invention Figure 5 The sectional view at A-A in the initial state of the coordinate measuring machine in the present invention; Figure 7 It is the present invention Figure 6 The partial enlarged view at B in the present invention; Figure 8 It is the present invention Figure 5 The sectional view at A-A when adjusting the brake pads of the coordinate measuring machine in the present invention; Figure 9 It is the present invention Figure 8 The partial enlarged view at C in the present invention; Figure 10 It is the present invention Figure 5 The sectional view at D-D in the initial state of the coordinate measuring machine in the present invention; Figure 11 It is the present invention Figure 10 The partial enlarged view at E in the present invention; Figure 12 It is the present invention Figure 10 The sectional view at F-F in the present invention.

[0021] In the figure: 1. Installation bin; 11. Convex block; 12. Thumb rod; 13. Semi-circular groove; 14. U-shaped plate; 15. Roller; 16. First electric push rod; 2. Liquid cylinder; 21. Piston disc; 22. Liquid storage; 23. Electromagnetic flowmeter; 24. Liquid pipe; 3. Base; 31. Cross beam; 32. Slide carriage; 33. Probe head seat; 34. Probe; 35. Brake pad; 4. Slide disc; 401. Notch; 402. Straight rod; 403. Brush hair; 41. Second electric push rod; 42. Long groove; 43. Round rod; 44. Annular groove; 45. Annular plate; 451. Air cavity; 452. Annular air duct; 46. Gear; 47. Guide rod; 48. Rotating plate; 481. Air storage; 482. Inclined groove; 49. Connecting pipe; 5. Sector block; 51. Arc plate; 52. T-shaped rod; 53. Semi-circular block; 54. Sphere; 55. Suction cup; 56. Air groove. Specific embodiments

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] Such as Figures 1 to 12As shown, as an embodiment of the present invention; a multi-detection device for brake pads of the present invention includes a coordinate measuring instrument body, and a detection auxiliary component is installed on the coordinate measuring instrument body; an installation bin 1 is installed on the coordinate measuring instrument body; a convex block 11 is arranged in the installation bin 1, and the convex block 11 is fixedly installed at the bottom of the inner cavity of the installation bin 1; Two ejector rods 12 are arranged on both sides of the convex block 11, and the ejector rods 12 pass through the installation bin 1 and are slidably connected with the installation bin 1; the top of the ejector rod 12 is a hemispherical surface; A sector block 5 is fixedly connected to the top of the ejector rod 12; an arc plate 51 is fixedly connected to the sector block 5, and the four arc plates 51 are used for limiting the brake pad 35; Semicircular grooves 13 are formed on the surface of one end of the convex block 11 facing the ejector rod 12, and the ejector rods 12 are all slid in the semicircular grooves 13; a U-shaped plate 14 is arranged on the side of the ejector rod 12 away from the convex block 11; a plurality of rollers 15 are rotatably installed in the U-shaped plate 14 in a one-way manner, and the rollers 15 are in contact with the ejector rod 12 and can only rotate downward in a one-way manner; A first electric push rod 16 is arranged on the installation bin 1, and the extension rod of the first electric push rod 16 is fixedly connected to the U-shaped plate 14; Liquid cylinders 2 are arranged below the ejector rods 12; the ejector rods 12 extend into the liquid cylinders 2; a piston disc 21 is slidably connected in each liquid cylinder 2, and the piston disc 21 is fixedly connected to the ejector rod 12; liquid is filled below the piston disc 21; a spring is connected between the piston disc 21 and the liquid cylinder 2; A liquid storage bin 22 is fixedly connected below the convex block 11, and the four liquid cylinders 2 are all communicated with the liquid storage bin 22 through liquid pipes 24; electromagnetic flowmeters 23 are installed on the four liquid pipes 24, and the electromagnetic flowmeters 23 are connected to a computer, and the computer monitors the numerical changes of the electromagnetic flowmeters 23; In this embodiment, the coordinate measuring instrument body includes a base 3; a cross beam 31 is slidably installed on the base 3; a carriage 32 slides on the cross beam 31; a probe holder 33 slides up and down in the carriage 32; a probe 34 is installed at the bottom of the probe holder 33; The installation bin 1 is installed on the base 3; the brake pad 35 is composed of a back plate and a friction lining; The detection auxiliary component includes a sliding disc 4; the sliding disc 4 slides on the probe holder 33 and is perpendicular to the probe holder 33 and the probe 34; a second electric push rod 41 is installed on the probe holder 33, and the extension rod of the second electric push rod 41 is fixedly connected to the sliding disc 4; Long grooves 42 are formed at the four corners of the probe holder 33, and the cross section of the long grooves 42 is C-shaped; four round rods 43 are fixedly connected to the top of the sliding disc 4, and the round rods 43 are all slid in the long grooves 42; An annular groove 44 is formed on the outer circumferential surface of the sliding disk 4; an annular plate 45 is slidably connected in the annular groove 44; tooth grooves are circumferentially formed on the top surface of the annular plate 45 at uniform intervals; A servo motor is mounted on the top of the sliding disk 4; a gear 46 is mounted on the servo motor, and a part of the gear 46 extends into the sliding disk 4 and meshes with the tooth grooves; Uniformly arranged guide rods 47 are fixedly connected below the annular plate 45; the bottom of the guide rod 47 is fixedly connected with a rotating plate 48, and the rotating plate 48 is parallel to the probe 34.

[0024] When detecting the brake pad 35, first place the brake pad 35 in the four arc-shaped plates 51. The brake pad 35 placed in the arc-shaped plates 51 will contact the semi-circular surfaces of the four ejector rods 12, so as to provide four-point support for the back plate of the brake pad 35 and reduce the contact area with the back plate. Subsequently, control the second electric push rod 41 to extend. The extended second electric push rod 41 will push the sliding disk 4 to gradually move downward along the probe holder 33. The sliding disk 4 will drive the guide rod 47 to gradually move downward in the long groove 42. At the same time, the sliding disk 4 will drive the annular plate 45 and the rotating plate 48 to move downward. As the sliding disk 4 gradually moves downward, the rotating plate 48 will gradually contact the top surface of the brake pad 35 and squeeze the brake pad 35 downward for a certain distance. If the surface of the brake pad 35 is originally inclined, the downward moving rotating plate 48 will contact the higher side of the brake pad 35 at this time, and then will push the higher position of the brake pad 35 to move downward, and gradually make the brake pad 35 contact with multiple rotating plates 48. When multiple rotating plates 48 contact the surface of the brake pad 35 and push the brake pad 35 to move downward, the inclination degree of the surface of the brake pad 35 is adjusted at this time.

[0025] Subsequently, control the second electric push rod 41 to stop working. During the downward movement of the brake pad 35, it will push the ejector rod 12 to move downward. During the downward movement of the ejector rod 12, it will pass through multiple rollers 15 and push the rollers 15 to rotate downward unidirectionally. At the same time, it will push the piston disk 21 to move downward and compress the spring. The downward moving piston disk 21 will push the liquid to enter the liquid storage chamber 22 through the liquid pipe 24, and the value of the electromagnetic flowmeter 23 will change during the process of the liquid flowing through the electromagnetic flowmeter 23.

[0026] Subsequently, control the servo motor to drive the gear 46 to rotate. The rotating gear 46 will push the annular plate 45 to rotate within the annular groove 44, and the annular plate 45 will drive the rotating plate 48 to rotate. The rotating rotating plate 48 will rotate along the circumferential direction on the upper surface of the brake pad 35, so as to gradually contact different positions of the brake pad 35 in sequence. If the surface of the brake pad 35 is still in an inclined state at this time, during the rotation of the rotating plate 48, it will squeeze the higher side of the brake pad 35 to move downward. The downward-moving brake pad 35 will push the ejector rod 12 to move downward. Subsequently, the downward-moving ejector rod 12 will be limited and fixed by the roller 15, so that the brake pad 35 and the probe 34 are in a vertical state. During this process, the inclination of the surface of the brake pad 35 can be avoided.

[0027] Subsequently, by controlling the first electric push rod 16 to extend, the first electric push rod 16 will drive the U-shaped plate 14 and the roller 15 to squeeze the ejector rod 12, so as to further fix the ejector rod 12. When the ejector rod 12 is further locked and fixed, the brake pad 35 placed above the ejector rod 12 is also fixed at this time. Subsequently, the brake pad 35 can be detected. After the detection of the brake pad 35 is completed, control the first electric push rod 16 to contract, so as to drive the U-shaped plate 14 and the roller 15 to move away from the ejector rod 12. The piston disc 21 will push the ejector rod 12 to move upward under the action of the spring, so that the ejector rod 12 drives the brake pad 35 to return to the initial state.

[0028] In summary, by using the contact between the rotating plate 48 and the brake pad 35 and controlling the cyclic rotation of the brake pad 35, during the cyclic rotation of the rotating plate 48, it will gradually contact different positions of the brake pad 35. If the surface of the brake pad 35 is in an inclined state, since the plane formed during the rotation of the rotating plate 48 is perpendicular to the probe 34, the rotating rotating plate 48 will push the inclined position of the surface of the brake pad 35 to move downward and adjust the inclined state of the surface of the brake pad 35. When the surface of the brake pad 35 fits the plane formed during the rotation of the rotating plate 48, at this time the brake pad 35 and the probe 34 are in a vertical state, so as to avoid the situation that when the inclined brake pad 35 is detected, the detection data is seriously distorted and misjudgment occurs.

[0029] Meanwhile, when the brake pad 35 is squeezed by the rotating plate 48, it will push the corresponding ejector rod 12 downward. The downward-moving ejector rod 12 will push the piston disc 21 downward. When the piston disc 21 moves downward, it will push the liquid through the electromagnetic flowmeter 23, and the change in the value on the electromagnetic flowmeter 23 will be displayed on the computer. Therefore, during the rotation of the rotating plate 48, if the values on multiple electromagnetic flowmeters 23 do not change, at this time, the surface of the brake pad 35 is completely attached to the plane formed during the rotation of the rotating plate 48. Thus, by observing the change in the value of the electromagnetic flowmeter 23, it can be determined whether the brake pad 35 is in a state of being attached to the plane formed during the rotation of the rotating plate 48, preventing the rotating plate 48 from being controlled to stop rotating when the brake pad 35 is not attached to the plane formed during the rotation of the rotating plate 48, resulting in the brake pad 35 adjusted by the rotating plate 48 still being in an inclined state.

[0030] Finally, when using the probe 34 to detect the brake pad 35, the computer is used to monitor the values of multiple electromagnetic flowmeters 23 at the same time. Since the values on the electromagnetic flowmeters 23 are unchanged at this time, if the value on a certain electromagnetic flowmeter 23 changes during the detection process, it means that the position of the brake pad 35 has changed. Therefore, the rotating plate 48 can be controlled to move downward again and rotate along the brake pad 35 to adjust the inclined state of the surface of the brake pad 35. During this process, it can be prevented that when the probe 34 is detecting the brake pad 35, because it is a contact measurement, the brake pad 35 will be subjected to the force of the probe 34. If the brake pad 35 tilts under the force, it can be monitored, thus avoiding the situation that the tilt of the brake pad 35 cannot be detected, which will affect the detection result of the brake pad 35.

[0031] As an embodiment of the present invention; a rubber layer is fixedly connected to the outer circumferential surface of the roller 15; anti-slip patterns are provided on the outer surface of the rubber layer; since the rubber layer is fixedly connected to the roller 15 and the anti-slip patterns are provided on the rubber layer, the friction with the ejector rod 12 can be increased, avoiding the situation that the ejector rod 12 slides upward, resulting in a change in the position of the brake pad 35.

[0032] As an embodiment of the present invention; T-shaped rods 52 are slidably connected to the four arc-shaped plates 51, and springs are connected between the T-shaped rods 52 and the arc-shaped plates 51. Under the pulling force of the springs, the T-shaped rods 52 will contact the side surface of the back plate.

[0033] One side of the T-shaped rod 52 passing through the arc-shaped plate 51 is fixedly connected with a semi-circular block 53; a sphere 54 is rotated in the semi-circular block 53, and the sphere 54 contacts the side surface of the back plate and squeezes the back plate.

[0034] Above the sector block 5, there is a suction cup 55, and the suction cup 55 is fixedly connected to the ejector rod 12; an air groove 56 is formed in the ejector rod 12, the top of the air groove 56 communicates with the inner cavity of the suction cup 55, and the bottom of the air groove 56 communicates with the space above the piston disc 21.

[0035] When the brake pad 35 is placed between multiple arc-shaped plates 51, the side of the back plate will first contact the sphere 54, and then continue to push the brake pad 35 downward. The back plate will push the sphere 54 to gradually move away from the back plate. At the same time, the sphere 54 will push the semi-circular block 53 and the T-shaped rod 52 to move gradually. The moving T-shaped rod 52 will gradually extend from the arc-shaped plate 51 and stretch the spring. When the brake pad 35 contacts the top of the ejector rod 12, at this time, the sphere 54 abuts against the side of the back plate. The multiple spheres 54 can abut against multiple positions of the brake pad 35, so that the brake pad 35 can be fixed between the multiple arc-shaped plates 51, avoiding the situation that the brake pad 35 slides during the detection process.

[0036] On the other hand, when the brake pad 35 contacts the top of the ejector rod 12, the suction cup 55 will fit against the bottom end face of the back plate. When the ejector rod 12 is pushed downward, the downward moving ejector rod 12 will push the piston disc 21 downward. Since the air groove 56 is formed in the ejector rod 12, the downward moving piston disc 21 will extract the gas in the suction cup 55 through the air groove 56, so as to adsorb the suction cup 55 on the bottom surface of the back plate. By using multiple suction cups 55 to suck the back plate, the fixing effect on the brake pad 35 can be improved, avoiding the situation that the brake pad 35 slides during the detection process.

[0037] As an embodiment of the present invention; an air cavity 451 is formed in the annular plate 45; an annular air passage 452 is formed in the annular plate 45 above the air cavity 451; A connecting pipe 49 is installed above the sliding disc 4, and the connecting pipe 49 extends to the surface of the annular plate 45 and communicates with the annular air passage 452; the connecting pipe 49 is communicated with an external air compressor through a conduit; The guide rod 47 is of a cylindrical structure and communicates with the air cavity 451; an air chamber 481 is formed inside the rotating plate 48; inclined grooves 482 are formed on both sides of the rotating plate 48, and the inclined grooves 482 communicate with the air chamber 481.

[0038] A ball is rotatably connected to the bottom of the rotating plate 48.

[0039] In this embodiment, on the left and right sides of the probe holder 33, a notch 401 is formed in the sliding disc 4; A straight rod 402 is rotatably connected to the notch 401 through a torsion spring and a rotating shaft. In the initial state, blocked by the probe holder 33, the straight rod 402 is located in the notch 401; a brush 403 is fixedly connected to the bottom of the straight rod 402.

[0040] Before testing the brake pad 35, connect the connecting pipe 49 to the external air compressor, and the gas will enter the connecting pipe 49. Since the connecting pipe 49 is connected to the annular air channel 452, the gas will enter the air cavity 451. Then, the gas will pass through the guide rod 47 and enter the air chamber 481 of the rotating plate 48. Since the air chamber 481 is provided with an inclined groove 482, the gas will be ejected from the inclined groove 482. When the rotating plate 48 acts on the brake pad 35, the gas ejected through the inclined groove 482 will act on the surface of the brake pad 35, thereby cleaning the surface of the brake pad 35 and blowing off the dust or impurities on the brake pad 35, so as to prevent the impurities on the brake pad 35 from affecting the detection process of the probe 34. Since there are evenly arranged rotating balls at the bottom of the rotating plate 48, when the rotating plate 48 makes a circular motion along the brake pad 35, the friction between the rotating plate 48 and the brake pad 35 can be reduced, thereby avoiding excessive friction between the rotating plate 48 and the brake pad 35, which will push the brake pad 35 to slide on the top of the top rod 12 and the multiple curved plates 51.

[0041] When the straight rod 402 moves to the position of the probe head 33, it will gradually return to its initial state under the obstruction of the probe head 34.

[0042] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0043] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi - detection device for brake pads, including a coordinate measuring instrument body, characterized in that: A detection auxiliary component is installed on the coordinate measuring instrument body; an installation bin (1) is installed on the coordinate measuring instrument body; a convex block (11) is arranged in the installation bin (1), and the convex block (11) is fixedly installed at the bottom of the inner cavity of the installation bin (1). Two ejector rods (12) are arranged on both sides of the convex block (11). The ejector rods (12) pass through the installation bin (1) and are slidably connected with the installation bin (1); the top of the ejector rod (12) is a hemispherical surface. The top of the ejector rod (12) is fixedly connected with a sector block (5); an arc plate (51) is fixedly connected to the sector block (5). Semicircular grooves (13) are formed on the surface of one end of the convex block (11) facing the ejector rod (12), and the ejector rods (12) are all slid in the semicircular grooves (13); a U-shaped plate (14) is arranged on the side of the ejector rod (12) away from the convex block (11); a plurality of rollers (15) are rotatably installed in the U-shaped plate (14) in a one-way manner. A first electric push rod (16) is arranged on the installation bin (1), and the extension rod of the first electric push rod (16) is fixedly connected to the U-shaped plate (14). A liquid cylinder (2) is arranged below each ejector rod (12); the ejector rod (12) extends into the liquid cylinder (2); a piston disc (21) is slidably connected in the liquid cylinder (2), and the piston disc (21) is fixedly connected to the ejector rod (12); liquid is filled below the piston disc (21); a spring is connected between the piston disc (21) and the liquid cylinder (2). A liquid storage bin (22) is fixedly connected below the convex block (11), and the four liquid cylinders (2) are all communicated with the liquid storage bin (22) through liquid pipes (24); electromagnetic flowmeters (23) are installed on the four liquid pipes (24).

2. The brake pad multiple detection device according to claim 1, characterized in that: The coordinate measuring instrument body includes a base (3); a cross beam (31) is slidably installed on the base (3); a carriage (32) slides on the cross beam (31); a probe holder (33) slides up and down in the carriage (32); a probe (34) is installed at the bottom of the probe holder (33). The installation bin (1) is installed on the base (3); the brake pad (35) is composed of a back plate and a friction lining. The detection auxiliary component includes a sliding disc (4); the sliding disc (4) slides on the probe holder (33) and is perpendicular to the probe holder (33) and the probe (34); a second electric push rod (41) is installed on the probe holder (33), and the extension rod of the second electric push rod (41) is fixedly connected to the sliding disc (4). Long grooves (42) are formed at the four corners of the probe holder (33), and the cross section of the long groove (42) is C-shaped; four round rods (43) are fixedly connected to the top of the sliding disc (4), and the round rods (43) are all slid in the long grooves (42). An annular groove (44) is formed on the outer circumferential surface of the sliding disc (4); an annular plate (45) is slidably connected in the annular groove (44); tooth grooves are formed on the top surface of the annular plate (45) along the circumferential direction and are evenly distributed. A servo motor is installed on the top of the sliding disc (4); a gear (46) is installed on the servo motor, and the gear (46) partially extends into the sliding disc (4) and meshes with the tooth grooves. Below the said annular plate (45), guide rods (47) are fixedly connected in a uniformly arranged manner; at the bottom of the said guide rods (47), a rotating plate (48) is fixedly connected, and the rotating plate (48) is parallel to the probe (34).

3. The brake pad multiple detection device according to claim 1, characterized in that: On the outer circumferential surface of the said roller (15), a rubber layer is fixedly connected.

4. The multi-detection device for brake pads according to claim 3, wherein: Anti-slip patterns are provided on the outer surface of the said rubber layer.

5. The multi-detection device for brake pads according to claim 1, wherein: T-shaped rods (52) are slidably connected to all four of the said arc-shaped plates (51), and springs are connected between the T-shaped rods (52) and the arc-shaped plates (51). Under the pulling force of the springs, the T-shaped rods (52) are in contact with the side surface of the back plate.

6. The brake pad multiple detection device according to claim 5, characterized in that: One side of the said T-shaped rod (52) passing through the arc-shaped plate (51) is fixedly connected with a semi-circular block (53); a spherical body (54) is rotatably arranged within the said semi-circular block (53), and the spherical body (54) is in contact with the side surface of the back plate and presses the back plate.

7. The multi-detection device for brake pads according to claim 1, characterized in that: Above the said sector-shaped block (5), a suction cup (55) is provided, and the suction cup (55) is fixedly connected to the top rod (12). An air groove (56) is provided within the said top rod (12). The top of the air groove (56) is communicated with the inner cavity of the suction cup (55), and the bottom of the air groove (56) is communicated with the space above the piston disc (21).

8. The multi-detection device for brake pads according to claim 2, wherein: An air cavity (451) is provided within the said annular plate (45); above the said air cavity (451), an annular air passage (452) is provided on the annular plate (45). Above the said sliding disc (4), a connecting pipe (49) is installed, and the connecting pipe (49) extends to the surface of the annular plate (45) and is communicated with the annular air passage (452). The said guide rod (47) is of a cylindrical structure and is communicated with the air cavity (451); an air chamber (481) is provided within the said rotating plate (48); inclined grooves (482) are provided on both sides of the said rotating plate (48), and the inclined grooves (482) are communicated with the air chamber (481).

9. The multi-detection device for brake pads according to claim 2, characterized in that: A ball is rotatably connected to the bottom of the said rotating plate (48).

10. The brake pad multiple detection device according to claim 2, characterized in that: On the left and right sides of the said probe holder (33), notches (401) are provided on the sliding disc (4). Within the said notches (401), a straight rod (402) is rotatably connected through a torsion spring and a rotating shaft. In the initial state, blocked by the probe holder (33), the straight rod (402) is located within the notch (401); the bottom of the said straight rod (402) is fixedly connected with a brush (403).

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