A tire puncture device for simulating a tire blowout test

Abstract

The utility model discloses a kind of tire breaking device for simulating tire burst test, including mounting seat, for being fixed on the hub of wheel;Tire breaking drive mechanism, installation is on mounting seat, including motor, speed reducer and electric slip ring, the rotating end of electric slip ring is electrically connected with motor, static end is connected with power cord, and static end is also connected with vehicle body fixing frame, vehicle body fixing frame is fixed on the body of motor vehicle;Tire breaking execution mechanism, including rope support, tire breaking cutter and drawstring, rope support is fixed on mounting seat, pulley is equipped on rope support, drawstring passes pulley, one end is wound on the output shaft of speed reducer, other end is connected tire breaking cutter by cutter fixing head, tire breaking cutter includes blade, blade edge is compared with the pulling direction of drawstring and is obliquely arranged. The utility model can realize the cutting tire breaking of tire breaking cutter from inside to outside, avoid the risk of falling produced by tool externalization, guarantee that test process is safely and reliably completed.

Description

Technical Field

[0001] This utility model belongs to the field of automotive safety testing technology, and specifically relates to a tire bursting device for simulating tire blowout testing. Background Technology

[0002] With the rapid development of modern transportation, the number of cars and new cars on the road is increasing year by year, putting increasing pressure on roads. For example, on highways, vehicle density is rising, especially during holidays. Vehicles on highways operate in a relatively closed environment with no other road users. When danger occurs, besides subjective factors such as fatigued driving and drunk driving, the most common cause of serious accidents is tire blowout. Therefore, in vehicle testing, it is necessary to simulate tire blowouts to measure changes in various tire parameters during the blowout process, and then make corresponding improvements to the tire.

[0003] Currently, the tire blowout measurement devices on the market mainly employ the following four technical solutions for tire blowout detection: (1) Using detonators pre-embedded in tires for blasting; (2) Using road barriers pre-buried on the road to damage the tire's exterior; (3) By making holes in the wheel hub and using a solenoid valve to control the deflation of the tires; (4) Using a tool mounted on the wheel hub, the tool is controlled by a motor and air pressure to cut the tire from the outside of the tire side.

[0004] Depending on the application area, simulated tire blowout detection devices must also comply with the standards of the corresponding region. These include FMVSS 110 (US standard), KMVSS 88-2 (Korean standard), GB / T 38796—2020 "Performance Requirements and Test Methods for Emergency Safety Devices for Tire Blowouts of Automobiles", GB / T30513-2014 "Technical Requirements and Test Methods for Tire Blowout Monitoring and Control Systems for Passenger Cars", and JT / T 782-2020 "Technical Requirements and Test Methods for Emergency Safety Devices for Tire Blowouts of Commercial Vehicles", etc.

[0005] The above four methods of tire puncture have the following drawbacks: 1. While pre-embedded detonators can deflate tires, according to standards (such as GB / T38796-2020), when a vehicle reaches 80 km / h, the deflation time of 0.75 seconds from the tire's rated pressure to atmospheric pressure cannot be measured using this method. Furthermore, because the deflation volume is difficult to control, it's impossible to confirm the technical requirements of at least 50 mm for tires with a cross-sectional width no greater than 245 mm and at least 80 mm for tires with a cross-sectional width greater than 245 mm. This method only damages the tire; it cannot collect or digitize the deflation time, pressure, and vehicle speed required by the standards.

[0006] 2. Using roadside obstacles pre-buried on the road can deflate tires, but the operation is difficult. The standard requires that the sidewall of the test vehicle's tires be damaged, which is very difficult for test personnel to operate. At the same time, it is impossible to collect deflation time, deflation pressure, and vehicle speed.

[0007] 3. The method of venting air using a solenoid valve with an opening on the wheel hub is inconsistent with the requirement of GB / T38796-2020 to vent air on the tire sidewall.

[0008] 4. Using a blade mounted on the wheel hub, and controlling the blade with a motor and air pressure to cut the outside of the tire sidewall, can deflate the tire. However, the test was conducted while the vehicle was moving at high speed, and there are certain risks associated with cutting from the outside. The blade may fly out, potentially damaging the equipment and endangering personnel safety. Utility Model Content

[0009] This utility model addresses the problems existing in the tire puncture device in the prior art by providing a tire puncture device for simulating tire blowout testing. The blade for puncturing the tire is pre-embedded inside the tire, and the blade is pulled from the inside out by an external rope to puncture the tire, thus achieving tire puncture. There is no safety hazard of blade falling off and flying and injuring people.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tire bursting device for simulating tire bursting test, including a mounting base for being fixedly connected to the wheel hub; The tire-puncture drive mechanism, mounted on the mounting base, includes a motor, a reducer, and an electric slip ring. The rotating end of the electric slip ring is electrically connected to the motor, and the stationary end of the electric slip ring is connected to the power line. The stationary end is also connected to the vehicle body mounting bracket, which is used to fix the vehicle body to the vehicle body. The tire-puncture actuator includes a rope support, a tire-puncture blade, and a pull rope. The rope support is fixed on the mounting base and has a pulley. The pull rope passes around the pulley, with one end wound around the output shaft of the reducer and the other end connected to the tire-puncture blade via a blade fixing head. The tire-puncture blade includes a blade with one narrow end and the other wide end. The narrow end is connected to the blade fixing head, and the cutting edge of the blade is located on one or both sides between the narrow end and the wide end, and is inclined relative to the pulling direction of the pull rope.

[0011] Furthermore, the front end of the tool fixing head is provided with an installation slot, and the narrow end of the tire-breaking tool is inserted into the installation slot and fixed by fasteners passing through the tool fixing head and the tire-breaking tool.

[0012] Furthermore, the tool fixing head has a cylindrical structure with a threaded hole on its end face. The tire-breaking tool also includes a tool holder. The narrow end of the blade is connected to the tool holder as an integral structure. The tool holder is machined with external threads for threaded connection with the threaded hole of the tool fixing head.

[0013] Furthermore, the mounting hole on the mounting base for connecting the wheel hub is an elongated slot extending radially along the wheel hub.

[0014] Furthermore, an anti-rotation rod is provided on the vehicle body mounting bracket, one end of which is connected to the stationary end of the electric slip ring, and the power line is laid along the anti-rotation rod.

[0015] Furthermore, the vehicle body mounting bracket includes a support frame and a vehicle body adsorption component mounted on the support frame, the adsorption component being used to adsorb onto the vehicle body.

[0016] Furthermore, the vehicle body adsorption component is a suction cup or a magnet.

[0017] Furthermore, the anti-rotation rod is cross-connected to the bracket.

[0018] Furthermore, the mounting base 1 is also provided with a support plate assembly, which includes a side plate and a top plate. The side plate is fixed on the mounting base, and the top plate is fixed on the side plate. The top plate and the side plate form a space to accommodate the tire-puncture drive mechanism. The top plate has a through hole for the pull rope to pass through. The output shaft of the reducer in the tire-puncture drive mechanism is rotatably supported on the inner side of the side plate.

[0019] Furthermore, it also includes a tire pressure sensor, which is fixed to the mounting base or the side plate and connected to the valve on the wheel hub to monitor the tire pressure in real time.

[0020] The beneficial effects achieved by this utility model are as follows: 1. In use, the tire puncture cutter is built into the tire. When a tire puncture is needed, a motor drives a pull rope to pull the tire puncture cutter, causing the blade to cut the sidewall of the tire and achieve puncture. This inside-out cutting method avoids the risk of the cutter falling off due to its external placement, ensuring the safe and reliable completion of the testing process.

[0021] 2. The tire puncture cutter of this utility model has blades on one or both sides of the blade, and the blades are inclined, which helps to smoothly cut the sidewall of the tire. Moreover, by changing the blade, controlling the rotation angle of the motor, or adjusting the installation depth of the blade fixing head, different cutting lengths can be achieved to meet different tire puncture requirements.

[0022] 3. During testing, the mounting base, motor, and reducer need to rotate with the wheel, but the motor's power cord cannot rotate. This invention solves this problem by using an electric slip ring. The anti-rotation rod is fixedly connected to the vehicle body mounting frame, and its end is connected to the stationary end of the electric slip ring. This prevents the stationary end of the slip ring from rotating, allowing the power cord to be laid along the anti-rotation rod, preventing it from swinging freely during testing and improving testing safety.

[0023] 4. The vehicle body mounting bracket of this utility model is fixed to the vehicle body by suction cups, magnets and other adsorption components, making installation and disassembly more convenient.

[0024] 5. This utility model can meet the test requirements for simulated tire blowouts of commercial vehicles and passenger cars in standards such as FMVSS 110 (American standard), KMVSS 88-2 (Korean standard), GB / T38796—2020 "Performance Requirements and Test Methods for Emergency Safety Devices for Tire Blowouts of Automobiles", GB / T30513-2014 "Technical Requirements and Test Methods for Monitoring and Control Systems for Tire Blowouts of Passenger Cars", and JT / T 782-2020 "Technical Requirements and Test Methods for Emergency Safety Devices for Tire Blowouts of Commercial Vehicles". Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the tire-breaking actuator in this utility model; In the diagram: 1. Mounting base, 2. Rope bracket, 3. Tire puncture cutter, 301. Blade, 4. Pull rope, 5. Vehicle body mounting bracket, 501. Bracket, 502. Suction cup, 6. Anti-rotation rod, 7. Tire puncture drive mechanism, 8. Electric slip ring, 9. Pressure sensor, 10. Support plate assembly, 11. Cutter fixing head, 12. Pulley, 100. Tire, 200. Wheel hub. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] like Figure 1 As shown, a tire-burst test device for simulating tire blowout includes a mounting base 1, a tire-burst actuator, a tire-burst drive mechanism 7, a vehicle body fixing frame 5, an electric slip ring 8, and an anti-rotation rod 6.

[0028] The mounting base 1 is a circular fixing plate with mounting holes. The mounting base 1 is fixed to the outside of the wheel hub 200 by fixing bolts, and the mounting base 1 is arranged concentrically with the wheel hub. The mounting base 1 provides mounting support for the tire puncture actuator, tire puncture drive mechanism 7, etc.

[0029] Furthermore, the mounting hole is a radially extending elongated slot, and the fixing bolt can slide along the elongated slot to accommodate hubs 200 of different sizes.

[0030] The tire-puncture drive mechanism 7 includes a motor and a reducer, which are fixed on the mounting base 1. The motor outputs power through the reducer to drive the tire-puncture actuator to perform the tire-puncture action. The motor is a servo motor.

[0031] During testing, the motor and reducer need to rotate with the wheels, and the motor's wiring needs to be connected to a power source in the vehicle's cab; therefore, the wiring cannot rotate with the wheels. To achieve the goal of the motor rotating while the wiring remains stationary, an electric slip ring 8 is provided. The rotating end of the electric slip ring 8 is electrically connected to the motor, and the stationary end is electrically connected to the power supply line. An anti-rotation rod 6 is also connected to the stationary end of the electric slip ring 8, and the anti-rotation rod 6 is connected to the vehicle body mounting bracket 5 to prevent the stationary end of the electric slip ring 8 from rotating. The power supply line is laid along the anti-rotation rod 6 for connection to the power source in the vehicle's cab, allowing the driver to control the motor's start and stop from inside the vehicle.

[0032] The vehicle body mounting bracket 5 includes a bracket 501 and suction cups 502 mounted on the bracket 501. In this embodiment, two suction cups 502 are provided for adhering to the sheet metal surface of the vehicle body above the wheel to be tested. In other embodiments, magnets can be used instead of suction cups 502, utilizing the magnetic force of the magnets to adsorb the bracket onto the sheet metal surface of the vehicle body. A support rod is provided on the bracket 501 for supporting and connecting the anti-rotation rod 6. The anti-rotation rod 6 is arranged crosswise with the bracket 501, preferably perpendicularly.

[0033] like Figure 1 , 2 As shown, the tire-puncture actuator includes a rope support 2, a pull rope 4, and a tire-puncture cutter 3. The rope support 2 is fixed to the mounting base 1. Multiple pulleys 12 are spaced apart at the top of the rope support 2. The pull rope 4 passes over all the pulleys 12, and one end is wound and fixed to the output shaft of the tire-puncture drive mechanism 7, i.e., wound and fixed to the output shaft of the reducer. The other end of the pull rope 4 is fixedly connected to a cutter fixing head 11. The front end of the cutter fixing head 11 has a mounting slot. The tire-puncture cutter 3 is inserted into this mounting slot and fixed by bolts passing through the cutter fixing head 11 and the tire-puncture cutter 3, thus fixing the tire-puncture cutter 3 to the cutter fixing head 11. The blade 301 of the tire-puncture cutter 3 is inclined relative to the pulling direction of the pull rope 4 so that after being pulled by the pull rope 4, the blade 301 cuts the side of the tire. Furthermore, the tire-breaking cutter 3 is a blade, wherein one end for connecting the cutter fixing head is the narrow end of the blade, and the opposite end is the wide end of the blade. Thus, the shape of the blade can be triangular or trapezoidal, and the hypotenuse of the triangle or trapezoid is the cutting edge 301. The narrow end of the blade on the tire-breaking cutter 3 is fixed in the mounting slot of the cutter fixing head 11. Moreover, the tire-breaking cutter 3 is made of tungsten steel to produce a sharper cutting edge and to give the cutter greater strength.

[0034] Optionally, the tool fixing head 11 is a cylindrical structure with a threaded hole on its end face. The tire-breaking tool 3 includes a tool holder and a triangular or trapezoidal blade connected to the tool holder. The tool holder is machined with external threads for threaded connection with the threaded hole of the tool fixing head 11.

[0035] Furthermore, the top of the rope support 2 is provided with three pulleys 12, and the rim of the pulleys 12 is provided with an arc-shaped groove with an arc-shaped cross section. The pull rope 4 is located in the arc-shaped groove of the rim of the pulley 12 to prevent the pull rope 4 from slipping off the pulley 12.

[0036] In use, mounting holes are pre-drilled on the side of the tire 100. Then, the wheel hub 200 is removed from the tire 100. The cutter fixing head 11 is inserted into the mounting hole from the outside of the tire 100. The tire-puncturing cutter 3 is then fixed to the cutter fixing head 11 from the inside of the tire 100, and the installation depth of the cutter fixing head 11 is adjusted to maintain a certain distance between the blade of the tire-puncturing cutter 3 and the inner wall of the tire 100. Next, the tire 100 is mounted on the wheel hub 200 and inflated. The mounting base 1 is then fixed to the wheel hub 200, and the motor, reducer, and electric slip ring 8 are installed. Finally, the vehicle mounting bracket 5 is attached to the vehicle body sheet metal surface above the wheel using suction cups 502. The power cable connected to the stationary end of the electric slip ring 8 is fixed to the anti-rotation rod 6 using cable ties, tape, etc., and connected to the power supply in the cab. This completes the installation of the device.

[0037] During testing, when it is necessary to simulate a tire blowout using the tire puncture cutter 3, the driver starts the motor inside the vehicle. The motor pulls the pull rope 4, which pulls the tire puncture cutter 3 outward. The tire puncture cutter 3 uses its inclined blade to cut the side of the tire 100 from the inside of the tire 100 to simulate a tire blowout.

[0038] Depending on the specific testing requirements, different sizes of puncture cutters 3 can be used to create punctures of varying sizes. Alternatively, even with puncture cutters 3 of the same size, different motor rotation angles can be set to allow the pull rope 4 to drive the puncture cutter 3 to make different displacements, thereby cutting punctures of different sizes on the tire sidewall.

[0039] In other embodiments, a pressure sensor 9 may be installed on the mounting base 1, and the pressure sensor 9 is connected to the air valve on the wheel hub 200 to monitor the tire pressure value in the tire 100 in real time.

[0040] In other embodiments, the mounting base 1 is further provided with a support plate assembly 10. The support plate assembly 10 is mounted above the tire-puncture drive mechanism 7. The support plate assembly 10 includes a side plate and a top plate. The side plate is fixed to the mounting base 1, and the top plate is fixed to the side plate. The top plate and the side plate form a space to accommodate the tire-puncture drive mechanism 7. The top plate is provided with several through holes so that the rotating end of the electric slip ring 8 can pass through the top plate to connect with the motor, and the pull rope 4 can pass through the top plate to be wound and connected to the output shaft of the reducer.

[0041] The air pressure sensor 9 is fixed to the outer side of the side plate of the support plate assembly 10. The output shaft of the reducer in the tire puncture drive mechanism 7 can also be rotatably supported on the inner side of the side plate to reduce the vibration and radial runout of the output shaft rotation, ensuring that the tire puncture cutter 3 can cut the tire stably and reliably.

[0042] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model. The terminology used in the description of this application is only for describing specific implementation methods and is not intended to limit the exemplary implementation methods according to this application.

Claims

1. A tire destruction device for use in a simulated blowout test, comprising: Includes a mounting bracket for securely attaching to the wheel hub; The tire-puncture drive mechanism, mounted on the mounting base, includes a motor, a reducer, and an electric slip ring. The rotating end of the electric slip ring is electrically connected to the motor, and the stationary end of the electric slip ring is connected to the power line. The stationary end is also connected to the vehicle body mounting bracket, which is used to fix the vehicle body to the vehicle body. The tire-puncture actuator includes a rope support, a tire-puncture blade, and a pull rope. The rope support is fixed on the mounting base and has a pulley. The pull rope passes around the pulley, with one end wound around the output shaft of the reducer and the other end connected to the tire-puncture blade via a blade fixing head. The tire-puncture blade includes a blade with one narrow end and the other wide end. The narrow end is connected to the blade fixing head, and the cutting edge of the blade is located on one or both sides between the narrow end and the wide end, and is inclined relative to the pulling direction of the pull rope.

2. A tire damaging device for use in a simulated blowout test according to claim 1, wherein The front end of the tool fixing head is provided with an installation slot, the narrow end of the tire puncture tool is inserted into the installation slot, and is fixed by fasteners passing through the tool fixing head and the tire puncture tool.

3. A tire damaging device for use in a simulated blowout test according to claim 1, wherein The tool fixing head is a cylindrical structure with a threaded hole on its end face. The tire-breaking tool also includes a tool holder. The narrow end of the blade is connected to the tool holder as an integral structure. The tool holder is machined with external threads for threaded connection with the threaded hole of the tool fixing head.

4. A tire damaging device for use in a simulated blowout test according to claim 1, wherein The mounting hole on the mounting base for connecting the hub is a long slot extending radially along the hub.

5. A tire damaging device for use in a simulated blowout test according to claim 1, wherein An anti-rotation rod is provided on the vehicle body mounting bracket. One end of the anti-rotation rod is connected to the stationary end of the electric slip ring, and the power line is laid along the anti-rotation rod.

6. A tire damaging device for use in a simulated blowout test according to claim 5, wherein The vehicle body mounting bracket includes a bracket and a vehicle body suction unit mounted on the bracket, which is used to attach to the vehicle body.

7. The tire bursting device for simulating tire bursting tests according to claim 6, characterized in that, The vehicle body adsorption component is a suction cup or a magnet.

8. A tire burst test device for simulating tire bursting according to claim 6, characterized in that, The anti-rotation rod is cross-connected to the bracket.

9. A tire burst test device for simulating tire bursting according to claim 1, characterized in that, The mounting base is also provided with a support plate assembly, which includes a side plate and a top plate. The side plate is fixed on the mounting base, and the top plate is fixed on the side plate. The top plate and the side plate form a space to accommodate the tire-puncture drive mechanism. The top plate has a through hole for the pull rope to pass through. The output shaft of the reducer in the tire-puncture drive mechanism is rotatably supported on the inner side of the side plate.

10. A tire burst test device for simulating tire bursting according to claim 9, characterized in that, It also includes a tire pressure sensor, which is fixed to the mounting base or the side plate and connected to the valve on the wheel hub to monitor the tire pressure in real time.

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