A tire puncture resistance performance detection device and a method of using the same

Abstract

The application relates to the technical field of tire detection, in particular to a tire puncture resistance performance detection device and a use method thereof. The tire puncture resistance performance detection device comprises a gantry, a tire mounting mechanism, a puncture mechanism and a driving mechanism for driving the puncture mechanism to move up and down are arranged on the gantry from bottom to top, the puncture mechanism comprises a needle and a sealed needle cylinder, the needle is axially provided with a central air hole in communication with the needle cylinder, a rotating ring is rotationally arranged on the outer wall of the needle cylinder, a plurality of rectangular blades deviating from the axis of the needle cylinder are equidistantly arranged on the outer wall of the rotating ring, an annular groove in sealed communication with the needle cylinder is arranged on the inner wall of the rotating ring, and an exhaust hole in communication with the annular groove is horizontally arranged in the blade. The application can quickly judge the puncture resistance performance of the tire, the tire is simple to mount, and the service life of the equipment is long.

Description

Technical Field

[0001] This invention relates to the field of tire testing technology, and in particular to a tire puncture resistance testing device and its usage method. Background Technology

[0002] Tires are easily punctured when encountering sharp objects during driving, affecting vehicle safety. Therefore, it is necessary to test the puncture resistance of tires. Patent CN118883103B discloses a tire puncture resistance testing system for automobiles, including a testing platform with a mounting component. The mounting component uses a screw and threaded sleeve to attach the tire. A support structure is provided on the testing platform, with the suspended end of the screw supported by a support frame. A puncture component is located above the mounting component, and a lifting component is also provided on the testing platform. The lifting component uses a jack to lift the tire. This invention solves the technical problem that tire puncture resistance testing devices cannot adapt to different tire sizes, and that tire testing requires a specialist to use additional equipment for lifting. However, the following problems exist: First, it is difficult to determine whether the puncture component has penetrated the tire, affecting the assessment of the tire's puncture resistance; second, tire installation and fixing are relatively complex, and after installation, the tire is off the ground and relies on the screw for support. The tire's own weight can easily deform the screw, affecting the equipment's lifespan.

[0003] In summary, there is an urgent need for a tire puncture resistance testing device that can quickly determine the tire's puncture resistance performance, is easy to install, and has a long service life. Summary of the Invention

[0004] To solve at least one of the above-mentioned technical problems, the present invention provides a tire puncture resistance testing device, including a gantry frame. The gantry frame is provided with a tire mounting mechanism, a puncture mechanism, and a driving mechanism for driving the puncture mechanism to move up and down from bottom to top. The puncture mechanism includes a needle and a sealed syringe. The needle has a central air hole communicating with the syringe in the axial direction. A rotating ring is rotatably provided on the outer wall of the syringe. A plurality of rectangular blades offset from the axis of the syringe are equidistantly provided on the outer circumference of the rotating ring. An annular groove communicating with the syringe is provided on the inner wall of the rotating ring. An exhaust hole communicating with the annular groove is provided horizontally in the blades.

[0005] Preferably, the syringe includes a barrel with a top opening and a top cover threadedly connected to the barrel. A sealing gasket is provided between the barrel and the top cover. The outer side wall of the barrel has a side hole communicating with the annular groove. The inner side wall of the rotating ring has two sealing rings, which are located on the upper and lower sides of the annular groove, respectively.

[0006] Preferably, the needle is further provided with a plurality of air distribution holes arranged equidistantly around the central air hole, the air inlet ends of the plurality of air distribution holes are arranged equidistantly along the needle axis, and the air outlet ends are connected to the syringe through a one-way valve. The upper end face of the rotating ring is provided with a proximity block, and the syringe is provided with a proximity switch for detecting the proximity block approaching.

[0007] Preferably, the driving mechanism includes a vertically slidable rectangular lifting rod that passes through the top of the gantry frame. The bottom of the lifting rod is connected to a syringe, and a rack is provided on the side wall. A servo motor is provided on the top of the gantry frame, and the output end of the servo motor is connected to a third gear that meshes with the rack.

[0008] Preferably, the tire mounting mechanism includes a lifting plate that is vertically slidably mounted on a gantry frame. The lifting plate is provided with a horizontal telescopic mechanism. The horizontal telescopic mechanism includes a fixed plate that can be connected to the wheel hub of the tire. The fixed plate is connected to a horizontal threaded rod and a guide rod that is parallel to the horizontal threaded rod. The guide rod slides through the lifting plate. A horizontal threaded cylinder that is threaded to the horizontal threaded rod is provided through and rotatably mounted on the lifting plate.

[0009] Preferably, the lifting plate is provided with a vertical telescopic mechanism, the vertical telescopic mechanism includes a vertical threaded rod rotatably connected to the upper end face of the lifting plate, and a vertical threaded cylinder screwed to the vertical threaded rod is fixedly provided on the top of the gantry frame.

[0010] Preferably, the lifting plate is provided with a telescopic drive mechanism, which includes a drive shaft and a driven shaft rotatably mounted on the lifting plate. The drive shaft is provided with a first gear, the driven shaft is provided with a first bevel gear and a second gear, the vertical threaded rod is provided with a second bevel gear that meshes with the first bevel gear, and the horizontal threaded cylinder is provided with a gear ring. The drive shaft passes through the lifting plate and can move horizontally, so that the first gear can selectively mesh with the second gear and the gear ring.

[0011] Preferably, one end of the drive shaft is provided with a handle and a first gear, and the other end passes through the lifting plate and is connected to a limiting flange.

[0012] Preferably, the gantry includes a base, two columns on the base, and a crossbeam at the top of the columns. The inner sidewall of the columns is provided with a vertical sliding groove. The lifting plate is provided with a slider that cooperates with the vertical sliding groove. The crossbeam includes a main beam connected to the two columns and a protruding beam perpendicular to the main beam. The protruding beam is provided with a sliding hole for the lifting rod and rack to pass through and a plate for fixing the servo motor.

[0013] This invention provides a method for using a tire puncture resistance testing device, comprising the following steps:

[0014] Step S1: Connect the servo motor of the drive mechanism to the controller, connect the controller to the display, and inflate the tire to the detection pressure.

[0015] Step S2: Fix the tire vertically on the tire mounting mechanism, and align the needle of the puncture mechanism with the tire.

[0016] Step S3: The drive mechanism drives the puncture mechanism to puncture the tire at the detection speed. If the needle of the puncture mechanism punctures the tire, the gas inside the tire enters the syringe through the central air hole on the needle, then enters the annular groove of the rotating ring from the syringe, and finally exits from the exhaust hole on the blade that is connected to the annular groove. During the exhaust process, the gas pushes the blade and the rotating ring connected to the blade to rotate. If the needle of the puncture mechanism does not puncture the tire, the blade and the rotating ring remain stationary, and the tire has the best puncture resistance.

[0017] Step S4: After the test is completed, the drive mechanism drives the puncture mechanism to reset, the needle is removed from the tire, and finally the tire is removed to complete one test.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] 1. The present invention provides a central air hole on the needle of the puncture mechanism, as well as a syringe, a rotating ring and a blade connected to the central hole. By observing whether the rotating ring and the blade rotate, it can be determined whether the needle has punctured the tire, thereby quickly judging the quality of the tire's puncture resistance.

[0020] 2. The needle of the puncture mechanism is equipped with several air distribution holes. The air inlet ends of the air distribution holes are arranged at equal intervals along the needle axis. As the needle penetration depth increases, the rotation speed of the rotating ring and the blade increases. The rotation speed of the rotating ring can be obtained by measuring the number of times the proximity block on the rotating ring approaches by the proximity switch. The smaller the rotation speed, the shallower the needle penetration depth into the tire, and the better the tire's puncture resistance.

[0021] 3. The horizontal telescopic mechanism on the tire mounting mechanism can be quickly connected and fixed to the tire rim via a fixing plate, and can also adjust the tire's horizontal position to align it with the needle of the puncture mechanism.

[0022] 4. The vertical telescopic mechanism can adjust the distance between the fixed plate on the horizontal telescopic mechanism and the ground, so that the tires are in natural contact with the ground. The ground supports the tires, which avoids bending and deformation of the horizontal telescopic mechanism and improves the service life of the equipment.

[0023] 5. The telescopic drive mechanism can control the extension and retraction of the horizontal and vertical telescopic mechanisms through its own horizontal movement and rotation, making operation simple and convenient;

[0024] In summary, this invention can quickly determine the puncture resistance of a tire, and the tire installation is simple with a long service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 Right view of the piercing mechanism;

[0027] Figure 3 for Figure 2 AA cross-section view;

[0028] Figure 4 for Figure 2 BB cross-section;

[0029] Figure 5 This is a schematic diagram of the drive mechanism;

[0030] Figure 6 This is a schematic diagram of the tire fixing mechanism;

[0031] Figure 7 Right view of the tire fixing mechanism;

[0032] Figure 8 This is a partial exploded view of the tire fixing mechanism;

[0033] Figure 9 This is a schematic diagram of the gantry frame structure;

[0034] Figure 10 This is a schematic diagram of the structure of the present invention after the tire is installed.

[0035] Explanation of reference numerals in the attached drawings: 1. Gantry frame; 11. Base; 12. Column; 121. Vertical slide groove; 13. Crossbeam; 131. Main beam; 132. Protruding beam; 133. Sliding hole; 134. Vertical plate; 2. Tire mounting mechanism; 21. Lifting plate; 211. Slider; 212. Circular shaft; 213. First circular groove; 214. First bearing; 22. Horizontal telescopic mechanism; 221. Fixed plate; 222. Horizontal threaded rod; 223. Guide rod; 224. Horizontal threaded cylinder; 2241. First annular flange; 2242. First turntable bearing; 23. Vertical telescopic mechanism; 231. Vertical threaded rod; 2311. Second circular groove; 2312. Second bearing; 232. Vertical threaded cylinder; 24. Telescopic drive mechanism; 241. Drive shaft. 2411, Handle; 2412, Limiting flange; 242, Driven shaft; 243, First gear; 244, First bevel gear; 245, Second gear; 246, Second bevel gear; 247, Gear ring; 3, Puncture mechanism; 31, Needle; 311, Central vent; 312, Separating vent; 32, Syringe; 321, Cylindrical body; 322, Top cover; 323, Sealing gasket; 324, Side hole; 325, Second annular flange; 326, Second turntable bearing; 33, Rotary ring; 331, Annular groove; 332, Sealing ring; 34, Blade; 341, Exhaust port; 35, One-way valve; 36, Proximity block; 37, Proximity switch; 4, Drive mechanism; 41, Lifting rod; 42, Rack; 43, Servo motor; 44, Third gear. Detailed Implementation

[0036] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples:

[0037] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention.

[0038] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. Example 1

[0039] Combined with appendix Figure 1-10This embodiment provides a tire puncture resistance testing device, including a gantry frame 1. The gantry frame 1 is provided with a tire mounting mechanism 2, a puncture mechanism 3, and a driving mechanism 4 for driving the puncture mechanism 3 to move up and down from bottom to top. The puncture mechanism 3 includes a needle 31 and a sealed syringe 32. The needle 31 is provided with a central air hole 311 communicating with the syringe 32 axially. The outer wall of the syringe 32 is provided with a rotating ring 33. The outer wall of the rotating ring 33 is provided with a plurality of rectangular blades 34 that are offset from the axis of the syringe 32 at equal intervals around its circumference. The inner wall of the rotating ring 33 is provided with an annular groove 331 that is sealed and communicates with the syringe 32. The blades 34 are provided with a horizontal vent hole 341 that communicates with the annular groove 331.

[0040] In the above technical solution, the structure of the tire mounting mechanism 2 is not limited, as long as it can fix the tire in a vertical position. The drive mechanism 4 can use conventional displacement drive components such as cylinders or hydraulic cylinders, as long as it can drive the puncture mechanism 3 to puncture the tire. In use, the puncture mechanism 3 can be connected to the controller, and the controller can be connected to the display. The tire is inflated until the tire pressure reaches the detection pressure. Then, the tire is fixed on the tire mounting mechanism 2 in a vertical position (vertical position refers to the tire's state when it is moving, i.e., the tire's axis of rotation is parallel to the ground). The drive mechanism 4 drives the puncture mechanism 3 to puncture the tire at the detection speed. If the needle 31 of the puncture mechanism 3 punctures the tire, the gas inside the tire enters the syringe 32 through the central air hole 311 on the needle 31, and then enters the annular groove 331 of the rotating ring 33 from the syringe 32. Finally, it exits through the exhaust hole 341 on the blade 34 that communicates with the annular groove 331. During the discharge process, since the blade 34 is offset from the axis of the syringe 32 (i.e., the extension line of the blade 34 does not intersect the central axis of the syringe 32, nor does it coincide with the radial line of the syringe 32), the gas pressure will be decomposed into radial force and oblique force when the gas passes through the exhaust port 341 of the blade 34. The oblique force will drive the blade 34 to rotate. Therefore, the gas will push the blade 34 and the rotating ring 33 connected to the blade 34 to rotate during the discharge process. If the needle 31 of the puncture mechanism 3 does not puncture the tire, no gas will be discharged, and the blade 34 and the rotating ring 33 will remain stationary. After the test is completed, the drive mechanism 4 drives the puncture mechanism 3 to reset, the needle 31 disengages from the tire, and finally the tire is removed to complete one test.

[0041] In this embodiment, a central air hole 311 is provided on the needle 31 of the puncture mechanism 3, and a syringe 32, a rotating ring 33 and a blade 34 are connected to the central air hole 311. By observing whether the rotating ring 33 and the blade 34 rotate, it can be determined whether the needle 31 punctures the tire, thereby quickly judging the quality of the tire's puncture resistance.

[0042] In one specific technical solution, the syringe 32 includes a cylindrical body 321 with a top opening and a top cover 322 threadedly connected to the cylindrical body 321. A sealing gasket 323 is provided between the cylindrical body 321 and the top cover 322. The outer side wall of the cylindrical body 321 is provided with a side hole 324 communicating with an annular groove 331. The inner side wall of the rotating ring 33 is provided with two sealing rings 332, which are located on the upper and lower sides of the annular groove 331, respectively.

[0043] In the above technical solution, the syringe 32's barrel 321 is preferably integrally formed with the needle 31. The top cover 322 of the barrel 321 is used to seal the top opening of the barrel 321. The inner side wall of the rotating ring 33 is provided with a sealing ring 332 to improve the sealing between the annular groove 331 and the barrel 321. The rotating ring 33 can be rotatably connected to the barrel 321 in any suitable manner. In this embodiment, the outer side wall of the barrel 321 is provided with a second annular flange 325. The second annular flange 325 is provided with a second rotating bearing 326, and the second rotating bearing 326 is connected to the rotating ring 33.

[0044] In one specific technical solution, the needle 31 is further provided with a plurality of air distribution holes 312 arranged equidistantly around the central air hole 311. The air inlet ends of the plurality of air distribution holes 312 are arranged equidistantly along the axial direction of the needle 31, and the air outlet ends are connected to the syringe 32 through a one-way valve 35. The upper end face of the rotating ring 33 is provided with a proximity block 36, and the syringe 32 is provided with a proximity switch 37 for detecting the proximity block 36 approaching.

[0045] In the above technical solution, the air inlet ends of several air distribution holes 312 are equidistantly arranged along the axial direction of the needle 31. This means that there is a height difference between the air inlet ends of several air distribution holes 312. Since the air distribution holes 312 are equidistantly arranged around the central air hole 311, the air inlet ends of several air distribution holes 312 are also dispersed around the circumferential sidewall of the needle 31, rather than located on the same vertical line. The one-way valve 35 can ensure that the airflow flows unidirectionally from the needle 31 into the syringe 32, preventing the airflow in the syringe 32 from flowing back to the needle 31. The several air distribution holes 312 can detect the depth of the needle 31 piercing the tire. The central air hole 311 is located on the central axis of the syringe 32, and its air inlet end is lower than the air inlet ends of the air distribution holes 312. When the needle 31 pierces the tire, since the air inlet ends of several air distribution holes 312 are equidistantly arranged along the axial direction of the needle 31, the number of air distribution holes 312 communicating with the inner cavity of the tire increases as the piercing depth of the needle 31 increases. That is, the air flow from the needle 31 to the syringe 32 increases. The increased air flow will increase the rotation speed of the rotating ring 33 and the blade 34. By measuring the number of times the proximity block 36 on the rotating ring 33 approaches within a certain period of time by the proximity switch 37, the rotation speed of the rotating ring 33 can be obtained. The smaller the rotation speed, the shallower the piercing depth of the needle 31 into the tire, and the better the tire's puncture resistance. The larger the rotation speed, the deeper the piercing depth of the needle 31 into the tire, and the worse the tire's puncture resistance.

[0046] In one specific technical solution, the drive mechanism 4 includes a vertically slidable rectangular lifting rod 41 that passes through the top of the gantry frame 1. The bottom of the lifting rod 41 is connected to a syringe 32, and a rack 42 is provided on the side wall. A servo motor 43 is provided on the top of the gantry frame 1, and the output end of the servo motor 43 is connected to a third gear 44 that meshes with the rack 42.

[0047] In the above technical solution, the servo motor 43 drives the third gear 44 to rotate. The rotation of the third gear 44 drives the rack 42 meshing with it and the lifting rod 41 connected to the rack 42 to rise or fall. Finally, it drives the piercing mechanism 3 connected to the lifting rod 41 to rise or fall. By adjusting the speed and number of rotations of the servo motor 43, the speed and depth of the piercing mechanism 3 piercing the tire can be adjusted.

[0048] In one specific technical solution, the tire mounting mechanism 2 includes a lifting plate 21 that is vertically slidably mounted on the gantry frame 1. The lifting plate 21 is provided with a horizontal telescopic mechanism 22. The horizontal telescopic mechanism 22 includes a fixed plate 221 that can be connected to the wheel hub of the tire. The fixed plate 221 is connected to a horizontal threaded rod 222 and a guide rod 223 that is parallel to the horizontal threaded rod 222. The guide rod 223 slides through the lifting plate 21. A horizontal threaded cylinder 224 that is threaded to the horizontal threaded rod 222 is provided through and rotatably mounted on the lifting plate 21.

[0049] In the above technical solution, the horizontal telescopic mechanism 22 can adjust the horizontal distance between the tire and the gantry 1 by horizontal telescopic adjustment, so that the part of the tire to be punctured is directly aligned with the needle 31 of the puncture mechanism 3. The fixed plate 221 is used to fix the tire. Preferably, the tire hub and the fixed plate 221 are connected by bolts. The guide rod 223 can circumferentially lock the fixed plate 221 and the lifting plate 21 to prevent the fixed plate 221 from rotating circumferentially relative to the lifting plate 21. In use, rotating the horizontal threaded cylinder 224 can drive the horizontal threaded rod 222 and the fixed plate 221 connected to the horizontal threaded rod 222 to move horizontally, thereby adjusting the position of the tire. The horizontal threaded cylinder 224 can pass through the lifting plate 21 and be rotatably connected to the lifting plate 21 in any suitable manner. In this embodiment, one end of the horizontal threaded cylinder 224 is provided with a first annular flange 2241. The first annular flange 2241 is connected to the first turntable bearing 2242, and the first turntable bearing 2242 is connected to the lifting plate 21.

[0050] In one specific technical solution, the lifting plate 21 is provided with a vertical telescopic mechanism 23, the vertical telescopic mechanism 23 includes a vertical threaded rod 231 rotatably connected to the upper end face of the lifting plate 21, and a vertical threaded cylinder 232 screwed to the vertical threaded rod 231 is fixedly provided on the top of the gantry frame 1.

[0051] In the above technical solution, the vertical telescopic mechanism 23 can adjust the distance between the fixed plate 221 and the ground through vertical telescopic adjustment, so that the tire can be in natural contact with the ground and supported by the ground. At this time, the horizontal telescopic mechanism 22 only plays a role in straightening the tire, ensuring that the tire is in a vertical position, and avoiding the problem of bending and deformation of the horizontal telescopic mechanism 22 due to the pressure of the tire's own weight on the horizontal telescopic mechanism 22. During installation, the tire is rolled vertically to the installation position, at which point the tire is in natural contact with the ground. By rotating the vertical threaded rod 231, the vertical height of the fixed plate 221 is adjusted to be consistent with the position of the wheel hub. Then, the wheel hub is connected and fixed to the fixed plate 221. The rotational connection method between the vertical threaded rod 231 and the lifting plate 21 is not limited. In this embodiment, the lower end face of the vertical threaded rod 231 is provided with a second circular groove 2311, and a second bearing 2312 is fixedly installed in the second circular groove 2311. The upper end face of the lifting plate 21 is provided with a circular shaft 212 connected to the second bearing 2312.

[0052] In one specific technical solution, the lifting plate 21 is provided with a telescopic drive mechanism 24. The telescopic drive mechanism 24 includes a drive shaft 241 and a driven shaft 242 rotatably mounted on the lifting plate 21. The drive shaft 241 is provided with a first gear 243, and the driven shaft 242 is provided with a first bevel gear 244 and a second gear 245. The vertical threaded rod 231 is provided with a second bevel gear 246 that meshes with the first bevel gear 244. The horizontal threaded cylinder 224 is provided with a gear ring 247. The drive shaft 241 passes through the lifting plate 21 and can move horizontally, so that the first gear 243 can selectively mesh with the second gear 245 and the gear ring 247.

[0053] In the above technical solution, the telescopic drive mechanism 24 can control the extension and retraction of the horizontal telescopic mechanism 22 and the vertical telescopic mechanism 23 by its own horizontal movement and rotation. When the horizontal telescopic mechanism 22 needs to be extended or retracted, the drive shaft 241 is moved horizontally, causing the first gear 243 on the drive shaft 241 to mesh with the gear ring 247. Then, the drive shaft 241 is rotated, driving the horizontal threaded cylinder 224 to rotate through the meshing transmission structure of the first gear 243 and the gear ring 247, thereby driving the horizontal threaded rod 222 and the fixed plate 221 to move horizontally. When the vertical telescopic mechanism 23 needs to be extended or retracted, the drive shaft 241 is moved horizontally, causing the first gear 243 on the drive shaft 241 to mesh with the second gear 245. Then, the drive shaft 241 is rotated, driving the driven shaft 242 to rotate through the meshing transmission structure of the first gear 243 and the second gear 245. The vertical threaded rod 231 is driven to rotate through the meshing transmission structure between the first bevel gear 244 on the driven shaft 242 and the second bevel gear 246 on the vertical threaded rod 231, thereby driving the vertical threaded rod 231 and the lifting plate 21 to move vertically. The driven shaft 242 can be rotatably mounted on the lifting plate 21 in any suitable form. In this embodiment, the lifting plate 21 is provided with a first circular groove 213, and a first bearing 214 is provided in the first circular groove 213. The first bearing 214 is connected to the driven shaft 242.

[0054] In one specific technical solution, one end of the drive shaft 241 is provided with a handle 2411 and a first gear 243, and the other end passes through the lifting plate 21 and is connected to the limiting flange 2412.

[0055] In the above technical solution, the handle 2411 facilitates the worker to rotate the drive shaft 241. The limiting flange 2412 serves two purposes: firstly, it limits the drive shaft 241 from slipping off the lifting plate 21; secondly, it controls the horizontal displacement of the drive shaft 241. In this embodiment, when the first gear 243 meshes with the gear ring 247, the first gear 243 abuts against the lifting plate 21, and the limiting flange 2412 is furthest from the lifting plate 21. When the first gear 243 meshes with the second gear 245, the first gear 243 is furthest from the lifting plate 21, and the limiting flange 2412 abuts against the lifting plate 21.

[0056] In one specific technical solution, the gantry frame 1 includes a base 11, two columns 12 disposed on the base 11, and a crossbeam 13 disposed on the top of the columns 12. The inner sidewall of the columns 12 is provided with a vertical sliding groove 121. The lifting plate 21 is provided with a slider 211 that cooperates with the vertical sliding groove 121. The crossbeam 13 includes a main beam 131 connected to the two columns 12 and a protruding beam 132 perpendicular to the main beam 131. The protruding beam 132 is provided with a sliding hole 133 for the lifting rod 41 and the rack 42 to pass through, and a vertical plate 134 for fixing the servo motor 43. The gantry frame 1 is a conventional support structure in the prior art. Its main structure includes columns 12 and crossbeams 13. The specific shapes of the columns 12 and crossbeams 13 can be designed according to specific process requirements. In this invention, the lifting plate 21 is set between the two columns 12, which can improve the lifting stability of the lifting plate 21. The crossbeam 13 is provided with a protruding beam 132, which can match the installation and fixing position of the tire, ensuring that the piercing mechanism 3 can be aligned with the tire.

[0057] The working principle and process of this embodiment are as follows: ① Connect the proximity switch 37 of the puncture mechanism 3 and the servo motor 43 of the drive mechanism 4 to the controller, and connect the controller to the display; ② Inflate the tire to the detection pressure, and then roll the tire vertically to the tire mounting mechanism 2. Control the vertical telescopic mechanism 23 to extend and retract vertically through the telescopic drive mechanism 24, so that the lifting plate 21 moves vertically to the appropriate position. At this time, the fixing plate 221 of the horizontal telescopic mechanism 22 on the lifting plate 21 is at the same height as the tire hub. Connect and fix the fixing plate 221 to the hub. Control the horizontal telescopic mechanism 22 to extend and retract horizontally through the telescopic drive mechanism 24, so that the tire moves directly below the puncture mechanism 3; ③ Drive mechanism 4 drives puncture mechanism 3 to puncture the tire at the detection speed. If the needle 31 of puncture mechanism 3 punctures the tire, the gas in the tire passes through the central air hole on the needle 31. 311 and the air distribution hole 312 enter the syringe 32, and then enter the annular groove 331 of the rotating ring 33 from the syringe 32. Finally, the gas is discharged from the exhaust hole 341 on the blade 34 that is connected to the annular groove 331. During the discharge process, the gas pushes the blade 34 and the rotating ring 33 connected to the blade 34 to rotate. By measuring the number of times the proximity block 36 on the rotating ring 33 approaches within a certain period of time through the proximity switch 37, the rotation speed of the rotating ring 33 can be obtained. The smaller the rotation speed, the shallower the depth of the needle 31 into the tire, and the better the tire's puncture resistance. When the rotation speed is zero, it indicates that the needle 31 has not punctured the tire and the puncture resistance is the best. The larger the rotation speed, the deeper the needle 31 penetrates the tire, and the worse the tire's puncture resistance. ④ After the test is completed, the drive mechanism 4 drives the puncture mechanism 3 to reset, the needle 31 is removed from the tire, and finally the tire is removed to complete one test. Example 2

[0058] Combined with appendix Figure 1-10 This embodiment provides a method for using a tire puncture resistance testing device. Using the tire puncture resistance testing device described in Embodiment 1 includes the following steps:

[0059] Step S1: Connect the servo motor 43 of the drive mechanism 4 to the controller, connect the controller to the display, and inflate the tire to make the tire pressure reach the detection pressure.

[0060] Step S2: Fix the tire vertically on the tire mounting mechanism 2, and align the needle 31 of the puncture mechanism 3 with the tire.

[0061] In step S3, the driving mechanism 4 drives the puncture mechanism 3 to puncture the tire at the detection speed. If the needle 31 of the puncture mechanism 3 punctures the tire, the gas inside the tire enters the syringe 32 through the central air hole 311 on the needle 31, and then enters the annular groove 331 of the rotating ring 33 from the syringe 32. Finally, it is discharged from the exhaust hole 341 on the blade 34 that is connected to the annular groove 331. During the discharge process, the gas pushes the blade 34 and the rotating ring 33 connected to the blade 34 to rotate. If the needle 31 of the puncture mechanism 3 does not puncture the tire, the blade 34 and the rotating ring 33 remain stationary, and the tire has the best puncture resistance.

[0062] Step S4: After the test is completed, the drive mechanism 4 drives the puncture mechanism 3 to reset, the needle 31 is removed from the tire, and finally the tire is removed to complete one test.

[0063] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A tire puncture resistance testing device, comprising a gantry frame (1), characterized in that, The gantry frame (1) is provided with a tire mounting mechanism (2), a puncture mechanism (3), and a driving mechanism (4) for driving the puncture mechanism (3) to move up and down from bottom to top. The puncture mechanism (3) includes a needle (31) and a sealed syringe (32). The needle (31) is provided with a central air hole (311) that communicates with the syringe (32) in the axial direction. The outer wall of the syringe (32) is provided with a rotating ring (33). The outer wall of the rotating ring (33) is provided with a number of rectangular blades (34) that are offset from the axis of the syringe (32) at equal intervals around the circumference. The inner wall of the rotating ring (33) is provided with an annular groove (331) that is sealed and communicates with the syringe (32). The blades (34) are provided with an exhaust hole (341) that communicates with the annular groove (331) in the horizontal direction. The syringe (32) includes a cylindrical body (321) with a top opening and a top cover (322) threadedly connected to the cylindrical body (321). A sealing gasket (323) is provided between the cylindrical body (321) and the top cover (322). The outer side wall of the cylindrical body (321) is provided with a side hole (324) communicating with the annular groove (331). The inner side wall of the rotating ring (33) is provided with two sealing rings (332). The sealing rings (332) are located on the upper and lower sides of the annular groove (331), respectively. The needle (31) is also provided with a number of air distribution holes (312) arranged equidistantly around the central air hole (311). The air inlet ends of the air distribution holes (312) are arranged equidistantly along the axial direction of the needle (31), and the air outlet ends are connected to the syringe (32) through a one-way valve (35). The upper end face of the rotating ring (33) is provided with a proximity block (36), and the syringe (32) is provided with a proximity switch (37) for detecting the proximity block (36) approaching.

2. The tire puncture resistance testing device according to claim 1, characterized in that, The drive mechanism (4) includes a vertically slidable rectangular lifting rod (41) that passes through the top of the gantry frame (1). The bottom of the lifting rod (41) is connected to a syringe (32), and a rack (42) is provided on the side wall. A servo motor (43) is provided on the top of the gantry frame (1), and the output end of the servo motor (43) is connected to a third gear (44) that meshes with the rack (42).

3. The tire puncture resistance testing device according to claim 2, characterized in that, The tire mounting mechanism (2) includes a lifting plate (21) that is vertically slidably mounted on the gantry (1). The lifting plate (21) is provided with a horizontal telescopic mechanism (22). The horizontal telescopic mechanism (22) includes a fixed plate (221) that can be connected to the wheel hub of the tire. The fixed plate (221) is connected to a horizontal threaded rod (222) and a guide rod (223) that is parallel to the horizontal threaded rod (222). The guide rod (223) slides through the lifting plate (21). A horizontal threaded cylinder (224) that is screwed to the horizontal threaded rod (222) is provided through and rotated on the lifting plate (21).

4. The tire puncture resistance testing device according to claim 3, characterized in that, The lifting plate (21) is provided with a vertical telescopic mechanism (23), which includes a vertical threaded rod (231) rotatably connected to the upper end face of the lifting plate (21). The top of the gantry frame (1) is fixedly provided with a vertical threaded cylinder (232) screwed to the vertical threaded rod (231).

5. The tire puncture resistance testing device according to claim 4, characterized in that, The lifting plate (21) is provided with a telescopic drive mechanism (24). The telescopic drive mechanism (24) includes a drive shaft (241) and a driven shaft (242) rotatably mounted on the lifting plate (21). The drive shaft (241) is provided with a first gear (243). The driven shaft (242) is provided with a first bevel gear (244) and a second gear (245). The vertical threaded rod (231) is provided with a second bevel gear (246) that meshes with the first bevel gear (244). The horizontal threaded cylinder (224) is provided with a gear ring (247). The drive shaft (241) passes through the lifting plate (21) and can move horizontally, so that the first gear (243) can mesh with either the second gear (245) or the gear ring (247).

6. The tire puncture resistance testing device according to claim 5, characterized in that, One end of the drive shaft (241) is provided with a handle (2411) and a first gear (243), and the other end passes through the lifting plate (21) and is connected to the limiting flange (2412).

7. The tire puncture resistance testing device according to claim 6, characterized in that, The gantry (1) includes a base (11), two columns (12) on the base (11), and a crossbeam (13) on the top of the columns (12). The inner sidewall of the columns (12) is provided with a vertical slide groove (121). The lifting plate (21) is provided with a slider (211) that cooperates with the vertical slide groove (121). The crossbeam (13) includes a main beam (131) connected to the two columns (12) and a protruding beam (132) perpendicular to the main beam (131). The protruding beam (132) is provided with a sliding hole (133) for the lifting rod (41) and the rack (42) to pass through, and a plate (134) for fixing the servo motor (43).

8. A method of using a tire puncture resistance testing device, characterized in that, Using the tire puncture resistance testing device according to claim 7 includes the following steps: Step S1: Connect the servo motor (43) of the drive mechanism (4) to the controller, connect the controller to the display, inflate the tire, and make the tire pressure reach the detection pressure. Step S2: Fix the tire vertically on the tire mounting mechanism (2) and align the needle (31) of the piercing mechanism (3) with the tire; Step S3: The driving mechanism (4) drives the puncture mechanism (3) to puncture the tire at the detection speed. If the needle (31) of the puncture mechanism (3) punctures the tire, the gas inside the tire enters the syringe (32) through the central air hole (311) on the needle (31), and then enters the annular groove (331) of the rotating ring (33) from the syringe (32). Finally, it is discharged from the exhaust hole (341) on the blade (34) that is connected to the annular groove (331). During the discharge process, the gas pushes the blade (34) and the rotating ring (33) connected to the blade (34) to rotate. If the needle (31) of the puncture mechanism (3) does not puncture the tire, the blade (34) and the rotating ring (33) remain stationary, and the tire has the best puncture resistance. Step S4: After the test is completed, the drive mechanism (4) drives the puncture mechanism (3) to reset, the needle (31) is removed from the tire, and finally the tire is removed to complete one test.

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