A brake pad multiple detection device

Abstract

The present invention belongs to the field of brake pad detection technology, specifically a brake pad multiple detection device; it includes a three-coordinate measuring instrument body; a detection auxiliary component is installed on the three-coordinate measuring instrument body; a mounting bin is installed on the three-coordinate measuring instrument body; a convex block is provided in the mounting bin; two push rods are provided on both sides of the convex block; the top of the push rod is fixedly connected to a fan-shaped block; the fan-shaped block is fixedly connected to an arc plate; a U-shaped plate is provided on the side of the push rod away from the convex block; a plurality of rollers are unidirectionally rotating in the U-shaped plate; a first electric push rod is provided on the mounting bin; a liquid cylinder is provided below the push rod; the push rod extends into the liquid cylinder; a piston disk is slidably connected in the liquid cylinder; a liquid bin is fixedly connected below the convex block; the present invention can avoid serious distortion of detection data and misjudgment when detecting tilted brake pads by arranging the mounting bin and the detection auxiliary component.

Description

Technical Field

[0001] The invention belongs to the technical field of brake pad detection, in particular to a brake pad multiple detection device. Background Art

[0002] Due to its high precision, three-dimensional coordinate measuring machines (CMMs) are commonly used for testing brake pad flatness. A CMM uses a probe to contact the brake pad surface, collecting three-dimensional coordinate points. Software then generates a surface profile and calculates flatness errors. Based on a spatial rectangular coordinate system, the CMM utilizes probe movement and feedback to accurately measure the coordinates of each point on the object being measured, thereby enabling testing of parameters such as flatness and form and position tolerances. During brake pad testing, accurate flatness data can theoretically be obtained by measuring multiple points on the pad surface, providing a basis for product quality assessment.

[0003] Because brake pad backing plates are produced using a casting process, the backing plates may tilt locally due to factors such as mold precision, pouring temperature, and uneven cooling rates. When inspected using a coordinate measuring machine (CMM), when the probe contacts the tilted area of ​​the backing plate, the probe trigger position shifts due to the tilted surface, resulting in a deviation in the measured height.

[0004] During actual testing operations, if the inspectors fail to place the brake pads accurately and horizontally on the measuring platform, causing the brake pads to be tilted as a whole, it will seriously interfere with the test results and cause large deviations in the test results. Qualified products may be misjudged as unqualified, or quality problems of unqualified products may be concealed, resulting in defective products entering the market and posing serious safety hazards.

[0005] Whether the brake pad back plate is partially tilted or tilted, it will cause serious distortion of the test data. In contact measurement, the probe trajectory offset will cause the Z-axis coordinate to be misjudged, which will not only cause cost waste due to qualified products being misjudged as scrap, or cause unqualified products to flow into the market and bring braking safety hazards, but also interfere with the subsequent friction performance test results, making key indicators such as friction coefficient and thermal decay lose their reference value, and ultimately affecting the effectiveness and reliability of brake pad quality control. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology and solve the above-mentioned technical problems, the present invention proposes a brake pad multiple detection device. By providing an installation chamber and a detection auxiliary component, it can avoid the serious distortion of detection data and misjudgment when detecting tilted brake pads. The technical solution of the present invention is as follows:

[0007] A brake pad multiple detection device includes a three-dimensional coordinate measuring instrument body, a detection auxiliary component is installed on the three-dimensional coordinate measuring instrument body; a mounting chamber is installed on the three-dimensional coordinate measuring instrument body; a convex block is provided in the mounting chamber, and the convex block is fixedly installed at the bottom of the inner cavity of the mounting chamber;

[0008] Two push rods are provided on both sides of the convex block, and the push rods pass through the installation chamber and are slidably connected to the installation chamber; the top of the push rod is a hemispherical surface;

[0009] The top of the push rod is fixedly connected to a sector block; the sector block is fixedly connected to an arc plate, and the four arc plates are used to limit the brake pads;

[0010] The convex block has a semicircular groove on one end surface facing the push rod, and the push rod slides in the semicircular groove; a U-shaped plate is provided on the side of the push rod away from the convex block; a plurality of rollers are unidirectionally rotated in the U-shaped plate, and the rollers are in contact with the push rod and can only rotate in one direction downward;

[0011] The installation compartment is provided with a first electric push rod, and the extension rod of the first electric push rod is fixedly connected to the U-shaped plate;

[0012] A fluid cylinder is provided below the push rod; the push rod extends into the fluid cylinder; a piston disc is slidably connected in the fluid cylinder, and the piston disc is fixedly connected to the push rod; liquid is filled below the piston disc; a spring is connected between the piston disc and the fluid cylinder;

[0013] A liquid tank is fixedly connected to the bottom of the convex block, and the four liquid cylinders are connected to the liquid tank through liquid pipes; an electromagnetic flow meter is installed on the four liquid pipes, and the electromagnetic flow meter is connected to a computer, and the computer is used to monitor the value changes of the electromagnetic flow meter.

[0014] As a preferred embodiment of the present invention, the three-dimensional coordinate measuring instrument body includes a base; a crossbeam is slidably mounted on the base; a slide is slidably mounted on the crossbeam; a probe seat is slidably mounted in the slide; a probe is mounted at the bottom of the probe seat;

[0015] The mounting chamber is mounted on the base; the brake pad is composed of a back plate and a friction lining;

[0016] The detection auxiliary component includes a sliding plate; the sliding plate slides on the probe base and is perpendicular to the probe base and the probe; a second electric push rod is installed on the probe base, and the extension rod of the second electric push rod is fixedly connected to the sliding plate;

[0017] The four corners of the probe seat are each provided with a long slot, and the cross section of the long slot is C-shaped; four round rods are fixedly connected to the top of the sliding plate, and the round rods all slide in the long slot;

[0018] The outer ring surface of the sliding disc is provided with an annular groove; an annular plate is slidably connected in the annular groove; the top surface of the annular plate is provided with tooth grooves evenly distributed along the circumferential direction;

[0019] A servo motor is installed on the top of the sliding plate; a gear is installed on the servo motor, and the gear part extends into the sliding plate and engages with the tooth groove;

[0020] The lower part of the annular plate is fixedly connected to the guide rods which are evenly arranged; the bottom of the guide rods is fixedly connected to the rotating plate, and the rotating plate is parallel to the probe.

[0021] As a preferred embodiment of the present invention, a rubber layer is fixedly connected to the outer ring surface of the roller.

[0022] As a preferred embodiment of the present invention, the outer surface of the rubber layer is provided with anti-slip grooves.

[0023] As a preferred embodiment of the present invention, the four arc-shaped plates are all slidably connected with T-shaped rods, and springs are connected between the T-shaped rods and the arc-shaped plates, so that the T-shaped rods can contact the side surfaces of the back plate under the tension of the springs.

[0024] As a preferred embodiment of the present invention, the T-shaped rod passes through one side of the arc-shaped plate and is fixedly connected to a semicircular block; a sphere rotates in the semicircular block, and the sphere contacts the side of the back plate and squeezes the back plate.

[0025] 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;

[0026] An air groove is provided in the push 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.

[0027] As a preferred embodiment of the present invention, an air cavity is provided in the annular plate; an annular air passage is provided on the annular plate above the air cavity;

[0028] A connecting pipe is installed above the sliding plate, and the connecting pipe extends to the surface of the annular plate and is connected to the annular air channel; the connecting pipe is connected to the external air compressor through a conduit;

[0029] The guide rod is a cylindrical structure and is connected to 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 connected to the air chamber.

[0030] As a preferred embodiment of the present invention, a ball is rotatably connected to the bottom of the rotating plate.

[0031] As a preferred embodiment of the present invention, grooves are provided on the sliding plate on the left and right sides of the probe base;

[0032] A straight rod is rotatably connected in the notch through a torsion spring and a rotating shaft. In an initial state, the straight rod is located in the notch under the obstruction of the probe seat; and bristles are fixedly connected to the bottom of the straight rod.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1. The brake pad multiple detection device described in the present invention utilizes a rotating plate to contact the brake pad and controls the brake pad to rotate cyclically. During the cyclic rotation of the rotating plate, it will gradually contact different positions of the brake pad. If the brake pad surface is in an inclined state, since the plane formed by the rotation of the rotating plate is perpendicular to the probe, the rotating rotating plate will push the inclined position of the brake pad surface downward and adjust the inclination state of the brake pad surface. When the brake pad surface is in contact with the plane formed by the rotation of the rotating plate, the brake pad and the probe are in a perpendicular state, thereby avoiding serious distortion of detection data and misjudgment during detection of tilted brake pads.

[0035] 2. The present invention describes a multiple detection device for brake pads. When the brake pad is squeezed by the rotating plate, it will push the corresponding push rod to move downward, and the downward moving push rod will push the piston disc to move downward. When the piston disc moves downward, it will push the liquid through the electromagnetic flowmeter, and the value changes 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, the surface of the brake pad is completely in contact with the plane formed when the rotating plate rotates. Therefore, by observing the value changes of the electromagnetic flowmeter, it can be judged whether the brake pad is in contact with the plane formed when the rotating plate rotates, to prevent the brake pad from not being in contact with the plane formed when the rotating plate rotates, thereby controlling the rotating plate to stop rotating, thereby causing the brake pad after adjustment by the rotating plate to still be in a tilted state.

[0036] 3. The brake pad multiple detection device described in the present invention uses a computer to monitor the values ​​of multiple electromagnetic flow meters when using a probe to detect the brake pad. Since the values ​​on the electromagnetic flow meters are unchanged at this time, if the value on a certain electromagnetic flow meter changes during the detection process, it means that the position of the brake pad has changed. Therefore, the turn plate can be controlled to move down again and rotate along the brake pad to adjust the inclination of the brake pad surface. In this process, it can prevent the brake pad from being subjected to the force of the probe due to contact measurement when the probe is detecting the brake pad. If the brake pad is tilted due to the force, it can be monitored to avoid the inability to detect the tilt of the brake pad, which will affect the detection result of the brake pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] Figure 1This is a state diagram of the three-coordinate measuring instrument of the present invention in the initial state;

[0039] Figure 2 This is a state diagram of the three-coordinate measuring instrument of the present invention when adjusting the brake pad;

[0040] Figure 3 It is a structural diagram of the detection auxiliary component and the probe base in the present invention;

[0041] Figure 4 This is a diagram of the internal structure of the installation bin in the present invention;

[0042] Figure 5 is a top view of the three-coordinate measuring machine of the present invention;

[0043] Figure 6 This invention Figure 5 Cross-sectional view at AA in the initial state of the coordinate measuring machine;

[0044] Figure 7 This invention Figure 6 A partial enlarged view of point B in the middle;

[0045] Figure 8 This invention Figure 5 Cross-sectional view at AA when adjusting the brake pad using a coordinate measuring machine;

[0046] Figure 9 This invention Figure 8 A partial enlarged view of point C in the middle;

[0047] Figure 10 This invention Figure 5 Cross-sectional view at DD in the initial state of the coordinate measuring machine;

[0048] Figure 11 This invention Figure 10 A partial enlarged view of point E in the middle;

[0049] Figure 12 This invention Figure 10 Cross-sectional view at FF in the middle.

[0050] In the figure: 1. Mounting chamber; 11. Convex block; 12. Push rod; 13. Semicircular groove; 14. U-shaped plate; 15. Roller; 16. First electric push rod; 2. Liquid cylinder; 21. Piston plate; 22. Liquid tank; 23. Electromagnetic flowmeter; 24. Liquid pipe; 3. Base; 31. Crossbeam; 32. Slide; 33. Probe base; 34. Probe; 35. Brake pad; 4. Slide plate; 401. Slot; 402. Straight rod; 403. Bristles; 41. Second electric push rod; 42. Long groove; 43. Round rod; 44. Annular groove; 45. Annular plate; 451. Air cavity; 452. Annular airway; 46. Gear; 47. Guide rod; 48. Rotating plate; 481. Air chamber; 482. Inclined groove; 49. Connecting pipe; 5. Fan-shaped block; 51. Arc plate; 52. T-bar; 53. Semicircular block; 54. Sphere; 55. Suction cup; 56. Air groove. DETAILED DESCRIPTION

[0051] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0052] like Figures 1 to 12 As shown in FIG. 1 , as an embodiment of the present invention, a brake pad multiple detection device according to the present invention comprises a three-dimensional coordinate measuring instrument body, on which a detection auxiliary component is installed; a mounting chamber 1 is installed on the three-dimensional coordinate measuring instrument body; a convex block 11 is provided in the mounting chamber 1, and the convex block 11 is fixedly mounted on the bottom of the inner cavity of the mounting chamber 1;

[0053] Two push rods 12 are provided on both sides of the convex block 11, and the push rods 12 pass through the installation chamber 1 and are slidably connected to the installation chamber 1; the top of the push rod 12 is a hemispherical surface;

[0054] The top of the push rod 12 is fixedly connected to a sector block 5; the sector block 5 is fixedly connected to an arc plate 51, and the four arc plates 51 are used to limit the brake pad 35;

[0055] The convex block 11 has a semicircular groove 13 on one end surface facing the push rod 12, and the push rod 12 slides in the semicircular groove 13; a U-shaped plate 14 is provided on the side of the push rod 12 away from the convex block 11; a plurality of rollers 15 are unidirectionally rotated in the U-shaped plate 14, and the rollers 15 are in contact with the push rod 12 and can only rotate in one direction downward;

[0056] The installation chamber 1 is provided with a first electric push rod 16, and the extension rod of the first electric push rod 16 is fixedly connected to the U-shaped plate 14;

[0057] A fluid cylinder 2 is provided below the push rod 12; the push rod 12 extends into the fluid cylinder 2; a piston disc 21 is slidably connected to the fluid cylinder 2, and the piston disc 21 is fixedly connected to the push rod 12; liquid is filled below the piston disc 21; a spring is connected between the piston disc 21 and the fluid cylinder 2;

[0058] A liquid tank 22 is fixedly connected to the lower portion of the convex block 11, and the four liquid cylinders 2 are connected to the liquid tank 22 through liquid pipes 24; an electromagnetic flowmeter 23 is installed on each of the four liquid pipes 24, and the electromagnetic flowmeter 23 is connected to a computer, and the computer is used to monitor the value changes of the electromagnetic flowmeter 23;

[0059] In this embodiment, the three-dimensional coordinate measuring machine body includes a base 3; a crossbeam 31 is slidably mounted on the base 3; a slide 32 is slidably mounted on the crossbeam 31; a probe base 33 is slidably mounted in the slide 32; a probe 34 is mounted at the bottom of the probe base 33;

[0060] The mounting chamber 1 is mounted on the base 3; the brake pad 35 is composed of a back plate and a friction lining;

[0061] The detection auxiliary component includes a sliding plate 4; the sliding plate 4 slides on the probe base 33 and is perpendicular to the probe base 33 and the probe 34; a second electric push rod 41 is installed on the probe base 33, and the extension rod of the second electric push rod 41 is fixedly connected to the sliding plate 4;

[0062] The four corners of the probe base 33 are each provided with a long slot 42, and the cross section of the long slot 42 is C-shaped; four round rods 43 are fixedly connected to the top of the sliding plate 4, and the round rods 43 all slide in the long slot 42;

[0063] The outer ring surface of the sliding disc 4 is provided with an annular groove 44; an annular plate 45 is slidably connected in the annular groove 44; the top surface of the annular plate 45 is provided with tooth grooves evenly distributed along the circumferential direction;

[0064] A servo motor is mounted on the top of the sliding plate 4; a gear 46 is mounted on the servo motor, and the gear 46 partially extends into the sliding plate 4 and engages with the tooth groove;

[0065] Guide rods 47 that are evenly arranged are fixedly connected to the lower portion of the annular plate 45 ; a rotating plate 48 is fixedly connected to the bottom of the guide rods 47 , and the rotating plate 48 is parallel to the probe 34 .

[0066] When testing 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 semicircular surfaces of the four push rods 12, thereby providing four-point support for the back plate of the brake pad 35, reducing the contact area with the back plate. Then, the second electric push rod 41 is controlled to extend. The extended second electric push rod 41 will push the sliding plate 4 to gradually move downward along the probe base 33, and the sliding plate 4 will drive the guide rod 47 to gradually move downward in the long groove 42. At the same time, the sliding plate 4 will drive the annular plate 45 and the rotating plate 48. As the sliding plate 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 distance. If the surface of the brake pad 35 is originally in an inclined state, the rotating plate 48 that moves downward will contact the higher side of the brake pad 35, and then push the higher position of the brake pad 35 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 downward, the inclination of the surface of the brake pad 35 is adjusted.

[0067] Then the second electric push rod 41 is controlled to stop working. During the downward movement of the brake pad 35, the push rod 12 will be pushed downward. During the downward movement of the push rod 12, it will pass through multiple rollers 15 and push the rollers 15 to rotate downward in one direction. At the same time, it will push the piston disc 21 downward and compress the spring. The downward moving piston disc 21 will push the liquid through the liquid pipe 24 into the liquid tank 22, and the value of the electromagnetic flowmeter 23 will change during the process of the liquid flowing through the electromagnetic flowmeter 23.

[0068] Subsequently, the servo motor is controlled to drive the gear 46 to rotate. The rotating gear 46 will push the annular plate 45 to rotate in the annular groove 44, and the annular plate 45 will drive the rotating plate 48 to rotate. The rotating rotating plate 48 will rotate in a circular direction on the upper surface of the brake pad 35, so that it can gradually contact different positions of the brake pad 35 in turn. 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, and the downward-moving brake pad 35 will push the push rod 12 to move downward, and then the downward-moving push 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. In this process, the surface of the brake pad 35 can be prevented from being tilted.

[0069] 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 push rod 12, so that the push rod 12 can be further fixed. When the push rod 12 is further locked and fixed, the brake pad 35 placed above the push rod 12 is also fixed, and then the brake pad 35 can be tested. If the brake pad 35 is tested, the first electric push rod 16 is controlled to retract, thereby driving the U-shaped plate 14 and the roller 15 away from the push rod 12, and the piston disc 21 will push the push rod 12 upward under the action of the spring, so that the push rod 12 drives the brake pad 35 to return to its initial state.

[0070] In summary, by utilizing the rotating plate 48 to contact 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 a tilted state, since the plane formed when the rotating plate 48 rotates is perpendicular to the probe 34, the rotating rotating plate 48 will push the tilted position of the surface of the brake pad 35 downward and adjust the tilt state of the surface of the brake pad 35. When the surface of the brake pad 35 fits the plane formed when the rotating plate 48 rotates, the brake pad 35 and the probe 34 are in a vertical state, thereby avoiding serious distortion of the detection data and misjudgment when detecting the tilted brake pad 35.

[0071] At the same time, when the brake pad 35 is squeezed by the rotating plate 48, it will push the corresponding push rod 12 to move downward, and the downward moving push rod 12 will push the piston disc 21 to move downward. When the piston disc 21 moves downward, it will push the liquid through the electromagnetic flowmeter 23, and the numerical changes on the electromagnetic flowmeter 23 will be displayed on the computer. Therefore, during the rotation of the rotating plate 48, if the numerical values ​​on multiple electromagnetic flowmeters 23 do not change, the surface of the brake pad 35 is completely in contact with the plane formed when the rotating plate 48 rotates. Therefore, by observing the numerical changes of the electromagnetic flowmeter 23, it can be judged whether the brake pad 35 is in contact with the plane formed when the rotating plate 48 rotates. To prevent the brake pad 35 from not being in contact with the plane formed when the rotating plate 48 rotates, the rotating plate 48 is controlled to stop rotating, resulting in the brake pad 35 after adjustment by the rotating plate 48 still being in a tilted state.

[0072] Finally, when the probe 34 is used to detect the brake pad 35, the computer is used to monitor the values ​​of multiple electromagnetic flow meters 23 at the same time. Since the value on the electromagnetic flow meter 23 is unchanged at this time, if the value on a certain electromagnetic flow meter 23 changes during the detection process, it means that the position of the brake pad 35 has changed. Therefore, the turn plate 48 can be controlled to move down again and rotate along the brake pad 35 to adjust the inclination state of the surface of the brake pad 35. In this process, it can be prevented that when the probe 34 is detecting the brake pad 35, due to contact measurement, the brake pad 35 will be subjected to the force of the probe 34. If the brake pad 35 tilts due to the force, it can be monitored to avoid the brake pad 35 being unable to detect the tilt, which will affect the detection result of the brake pad 35.

[0073] As an embodiment of the present invention, a rubber layer is fixedly connected to the outer ring surface of the roller 15; the outer surface of the rubber layer is provided with anti-slip grooves; since the rubber layer is fixedly connected to the roller 15 and the rubber layer is provided with anti-slip grooves, the friction with the push rod 12 can be increased, thereby preventing the push rod 12 from sliding upward, causing the position of the brake pad 35 to change.

[0074] As an embodiment of the present invention, the four arc-shaped plates 51 are all slidably connected with T-shaped rods 52, and a spring is connected between the T-shaped rods 52 and the arc-shaped plates 51, and the tension of the spring will make the T-shaped rods 52 contact with the side of the back plate.

[0075] The T-shaped rod 52 passes through one side of the arc-shaped plate 51 and is fixedly connected to a semicircular block 53; a ball 54 rotates inside the semicircular block 53, and the ball 54 contacts the side surface of the back plate and presses the back plate.

[0076] A suction cup 55 is provided above the sector block 5 and is fixedly connected to the push rod 12 ; an air groove 56 is provided in the push rod 12 , and the top of the air groove 56 is connected to the inner cavity of the suction cup 55 , and the bottom of the air groove 56 is connected to the space above the piston disc 21 .

[0077] When the brake pad 35 is placed between multiple curved 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 gradually away from the back plate. At the same time, the sphere 54 will push the semicircular block 53 and the T-shaped rod 52 to move gradually. The moving T-shaped rod 52 will gradually extend from the curved plate 51 and stretch the spring. When the brake pad 35 contacts the top of the push rod 12, the sphere 54 will be against the side of the back plate. The multiple spheres 54 can be used to support multiple positions of the brake pad 35, so that the brake pad 35 can be fixed between the multiple curved plates 51 to prevent the brake pad 35 from sliding during the detection process.

[0078] On the other hand, when the brake pad 35 contacts the top of the push rod 12, the suction cup 55 will fit with the bottom end surface of the back plate. When the push rod 12 is pushed downward, the downward-moving push rod 12 will push the piston disc 21 downward. Since an air groove 56 is provided on the push rod 12, the downward-moving piston disc 21 will extract the gas in the suction cup 55 through the air groove 56, thereby adsorbing 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 of the brake pad 35 can be improved, and the brake pad 35 can be prevented from sliding during the detection process.

[0079] 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 on the annular plate 45 above the air cavity 451;

[0080] A connecting pipe 49 is installed above the sliding plate 4, and the connecting pipe 49 extends to the surface of the annular plate 45 and is connected to the annular air channel 452; the connecting pipe 49 is connected to the external air compressor through a conduit;

[0081] The guide rod 47 is a cylindrical structure and is connected to the air cavity 451 ; an air chamber 481 is provided inside the rotating plate 48 ; inclined grooves 482 are provided on both sides of the rotating plate 48 , and the inclined grooves 482 are connected to the air chamber 481 .

[0082] The bottom of the rotating plate 48 is rotatably connected with a ball.

[0083] In this embodiment, the left and right sides of the probe base 33 are provided with notches 401 on the sliding plate 4;

[0084] A straight rod 402 is rotatably connected to the notch 401 via a torsion spring and a rotating shaft. In an initial state, the straight rod 402 is located in the notch 401 under the obstruction of the probe base 33 . Brush bristles 403 are fixedly connected to the bottom of the straight rod 402 .

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A brake pad multiple detection device, comprising a three-coordinate measuring instrument body, characterized in that: A detection auxiliary component is installed on the three-dimensional coordinate measuring machine body; an installation chamber (1) is installed on the three-dimensional coordinate measuring machine body; a convex block (11) is provided in the installation chamber (1), and the convex block (11) is fixedly installed on the bottom of the inner cavity of the installation chamber (1); Two push rods (12) are provided on both sides of the convex block (11), and the push rods (12) pass through the installation chamber (1) and are slidably connected to the installation chamber (1); the top of the push rod (12) is a hemispherical surface; The top of the push rod (12) is fixedly connected to the sector block (5); the upper portion of the sector block (5) is fixedly connected to the arc plate (51); A semicircular groove (13) is provided on one end surface of the convex block (11) facing the push rod (12), and the push rod (12) slides in the semicircular groove (13); a U-shaped plate (14) is provided on the side of the push rod (12) away from the convex block (11); a plurality of rollers (15) are unidirectionally rotated in the U-shaped plate (14); The installation chamber (1) is provided with a first electric push rod (16), and the extension rod of the first electric push rod (16) is fixedly connected to the U-shaped plate (14); A fluid cylinder (2) is provided below the push rod (12); the push rod (12) extends into the fluid cylinder (2); a piston disc (21) is slidably connected to the fluid cylinder (2), and the piston disc (21) is fixedly connected to the push rod (12); liquid is provided below the piston disc (21); a spring is connected between the piston disc (21) and the fluid cylinder (2); The lower portion of the convex block (11) is fixedly connected to a liquid bin (22), and the four liquid cylinders (2) are all connected to the liquid bin (22) via liquid pipes (24); and electromagnetic flow meters (23) are installed on the four liquid pipes (24).

2. The brake pad multiple detection device according to claim 1, characterized in that: The three-coordinate measuring instrument body comprises a base (3); a crossbeam (31) is slidably mounted on the base (3); a slide (32) is slidably mounted on the crossbeam (31); a probe seat (33) is slidably mounted in the slide (32); a probe (34) is mounted at the bottom of the probe seat (33); The mounting chamber (1) is mounted on a base (3); the brake pad (35) is composed of a back plate and a friction lining; The detection auxiliary component includes a sliding plate (4); the sliding plate (4) slides on the probe base (33) and is perpendicular to the probe base (33) and the probe (34); a second electric push rod (41) is installed on the probe base (33), and the extension rod of the second electric push rod (41) is fixedly connected to the sliding plate (4); The four corners of the probe seat (33) are each provided with a long slot (42), and the cross section of the long slot (42) is C-shaped; the top of the sliding plate (4) is fixedly connected to four round rods (43), and the round rods (43) all slide in the long slot (42); The outer ring surface of the sliding disc (4) is provided with an annular groove (44); an annular plate (45) is slidably connected in the annular groove (44); the top surface of the annular plate (45) is provided with tooth grooves evenly distributed along the circumferential direction; A servo motor is installed on the top of the sliding plate (4); a gear (46) is installed on the servo motor, and the gear (46) partially extends into the sliding plate (4) and engages with the tooth groove; The lower portion of the annular plate (45) is fixedly connected to uniformly arranged guide rods (47); the bottom portion of the guide rods (47) is fixedly connected to a rotating plate (48), 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: The outer ring surface of the roller (15) is fixedly connected with a rubber layer.

4. The brake pad multiple detection device according to claim 3, characterized in that: The outer surface of the rubber layer is provided with anti-skid grooves.

5. The brake pad multiple detection device according to claim 1, characterized in that: The four arc-shaped plates (51) are all slidably connected to T-shaped rods (52), and springs are connected between the T-shaped rods (52) and the arc-shaped plates (51). Under the tension of the springs, the T-shaped rods (52) contact the side surfaces of the back plate.

6. The brake pad multiple detection device according to claim 5, characterized in that: The T-shaped rod (52) passes through one side of the arc plate (51) and is fixedly connected to the semicircular block (53); the sphere (54) rotates inside the semicircular block (53), and the sphere (54) contacts the side surface of the back plate and presses the back plate.

7. The brake pad multiple detection device according to claim 1, characterized in that: A suction cup (55) is provided above the sector block (5), and the suction cup (55) is fixedly connected to the top rod (12); An air groove (56) is provided in the push 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 brake pad multiple detection device according to claim 2, characterized in that: An air cavity (451) is provided in the annular plate (45); an annular air passage (452) is provided above the air cavity (451) and on the annular plate (45); A connecting pipe (49) is installed above the sliding plate (4), and the connecting pipe (49) extends to the surface of the annular plate (45) and is connected to the annular air channel (452); The guide rod (47) is a cylindrical structure and is connected to the air cavity (451); an air chamber (481) is provided inside the rotating plate (48); inclined grooves (482) are provided on both sides of the rotating plate (48), and the inclined grooves (482) are connected to the air chamber (481).

9. The brake pad multiple detection device according to claim 2, characterized in that: The bottom of the rotating plate (48) is rotatably connected with a ball.

10. The brake pad multiple detection device according to claim 2, characterized in that: The left and right sides of the probe seat (33) are provided with notches (401) on the sliding plate (4); The straight rod (402) is rotatably connected in the notch (401) via a torsion spring and a rotating shaft. In an initial state, the straight rod (402) is located in the notch (401) under the obstruction of the probe base (33); the bottom of the straight rod (402) is fixedly connected to the brush bristles (403).

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