Automobile tire burst test device and method

Abstract

The invention relates to the technical field of tire burst devices, and discloses an automobile tire burst test device and method.The automobile tire burst test device comprises a base plate, a bayonet, a locking mechanism and a driving part, and the bayonet is provided with a folding position and an unfolding position in a first mounting groove; the locking mechanism comprises a locking piece, a first key, a limiting piece and a second key, and the locking piece can lock the bayonet at the folding position; the first key can drive the locking piece to unlock the bayonet; the limiting piece can limit the first key from being pressed down; the second key is arranged on the substrate in a lifting manner, and the second key can drive the limiting piece to relieve the downward pressing limitation on the first key; the driving piece can drive the bayonet to be switched from the folding position to the extending position. The tire burst prevention device has the advantages that the rear tire of the three-axle automobile can be accurately punctured, the front tire and the middle tire of the three-axle automobile are effectively prevented from being punctured by mistake, the overall structure is simple, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of tire blowout devices, and in particular to a vehicle tire blowout test device and method. Background Art

[0002] A tire blowout can easily cause a traffic accident, especially when the car is traveling at high speed on the highway. Therefore, before each model is launched on the market, the main engine manufacturer needs to conduct tire blowout tests on the car to reduce the damage caused by tire blowouts to the driver and passengers as well as the vehicle.

[0003] Existing automobile tire blowout tests mainly include the following forms: one is to install a deflation device on the automobile tire, and the air in the automobile tire is instantly released when the car is driving at high speed, simulating the moment of tire blowout; one is to install a puncture device on the automobile tire, and puncture the automobile tire while the car is driving at high speed; and another is to use a ground spike method, in which the puncture device is installed on the ground, and the car drives towards the puncture device at high speed, and the puncture device punctures the automobile tire.

[0004] In contrast, using ground spikes to puncture car tires more closely resembles a real-world blowout scenario. However, some specialized vehicles have three axles and therefore three rows of wheels (front, middle, and rear), such as high-performance off-road vehicles and commercial transporters. Using ground spikes during rear tire blowout testing makes it difficult to precisely control the rear wheel's contact with the device while the vehicle is moving forward toward the device. This can easily lead to the middle wheel pressing against the device, causing the middle tire to blow out accidentally. This increases testing costs and delays the test process. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention aims to solve the technical problem of providing a vehicle tire blowout test device and method that uses ground spikes to test the rear wheels of a three-axle vehicle for blowout.

[0006] The present invention solves the technical problem by adopting a technical solution of providing a vehicle tire blowout test device, wherein the vehicle bottom is provided with a front tire, a middle tire and a rear tire in sequence, and the test device comprises: A base plate, wherein the base plate is provided with a first mounting groove with an upward opening; The bayonet is rotatably disposed in the first mounting slot, and the bayonet has a retracted position and an extended position in the first mounting slot. When the bayonet is in the retracted position, the bayonet is accommodated in the first mounting slot; when the bayonet is in the extended position, the blade of the bayonet obliquely extends upward from the first mounting slot. A locking mechanism and a driving member, wherein the locking mechanism includes a locking member, a first button, a limiting member, and a second button, wherein the locking member is movably arranged on the base plate and can lock the bayonet in the retracted position; the first button can be raised and lowered on the base plate and movably counteract the locking member, and the first button can drive the locking member to release the lock of the bayonet; the limiting member is movably arranged below the first button and can limit the first button from being pressed downward; the second button can be raised and lowered on the base plate and movably counteract the limiting member, and the second button can drive the limiting member to release the downward restriction on the first button; the driving member can drive the bayonet to switch from the retracted position to the extended position; The front tire of the vehicle first presses onto the second button, thereby releasing the restriction on the first button from being pressed downward by the limiting member; The middle tire of the car presses onto the first button from behind, releasing the locking member from locking the bayonet, and the driving member drives the bayonet to switch from the retracted position to the extended position; The rear tire of the automobile is finally pressed against the bayonet, and the bayonet punctures the rear tire.

[0007] Furthermore, the bayonet has a rotation angle of less than ninety degrees from the retracted position to the extended position; A limiting slope is provided on the base plate. When the bayonet rotates to the outward position, the side wall of the bayonet abuts against the limiting slope, so that when the rear tire is pressed against the bayonet, the bayonet remains in the outward position.

[0008] Furthermore, the bayonet rotates from the retracted position to the extended position at an angle between 70 and 80 degrees; A limit block is respectively provided on both ends of the base plate close to the bayonet. The limit block is detachably fixedly connected to the base plate, and the limit block is located in the first mounting groove; the limit slope is located on the limit block.

[0009] Furthermore, the bayonet is hinged to the base plate via a rotating shaft; The driving member is configured as a torsion spring, and a torsion spring is sleeved on each of the two ends of the rotating shaft, one torsion arm of the torsion spring abuts against the base plate, and the other torsion arm of the torsion spring abuts against the side wall of the bayonet; When the bayonet is in the retracted position, the torsion spring is in a compressed state.

[0010] Furthermore, the torsion arm is arranged in an L shape; A first limiting groove is provided on the base plate, a second limiting groove is provided on the side wall of the bayonet, and the two torsion arms of the torsion spring are respectively arranged in the first limiting groove and the second limiting groove.

[0011] Furthermore, the bayonet includes a sleeve and a plurality of blades arranged axially along the sleeve, and the rotating shaft is passed through the sleeve; A locking groove is provided on the shaft sleeve in a direction away from the blade, and a locking tongue is provided on the locking member. The locking tongue can be locked into the locking groove to lock the bayonet in the retracted position.

[0012] Furthermore, the first button is provided with a first driving inclined surface, and the locking member is provided with a first driven inclined surface, wherein the first driving inclined surface and the first driven inclined surface are movably opposed to each other; the first button pushes the first driven inclined surface via the first driving inclined surface, causing the locking member to move telescopically, thereby releasing the lock on the bayonet; A first return spring is provided between the first button and the substrate, and when the first button is pressed, the first return spring is compressed; A first tensioning spring is provided between the locking member and the base plate. The elastic force of the first tensioning spring causes the locking member to tend to move in its locking direction. When the first button drives the locking member to unlock, the first tensioning spring is compressed.

[0013] Furthermore, the second button is provided with a second driving inclined surface, and the limiting member is provided with a second driven inclined surface, and the second driving inclined surface and the second driven inclined surface are movably opposed to each other; the second button pushes the second driven inclined surface through the second driving inclined surface, causing the limiting member to move telescopically, thereby releasing the downward limit on the first button; A second return spring is provided between the second button and the substrate, and when the second button is pressed, the second return spring is compressed; A second tensioning spring is provided between the limiting member and the substrate. The elastic force of the second tensioning spring causes the limiting member to tend to move toward the side close to the first button. When the second button drives the limiting member to release the downward limit on the first button, the second tensioning spring is compressed.

[0014] Furthermore, the two ends of the substrate are respectively provided with a first slope portion and a second slope portion; The substrate is provided with a second mounting groove and a third mounting groove in sequence, the first button is arranged in the second mounting groove in a liftable manner, and the second button is arranged in the third mounting groove in a liftable manner; The base plate is provided with a first sliding groove and a second sliding groove, the locking member is slidably disposed in the first sliding groove, and the limiting member is slidably disposed in the second sliding groove; The base plate includes a bottom plate and a top plate that are detachably connected, and the first mounting groove, the second mounting groove, the third mounting groove, the first sliding groove and the second sliding groove are at least partially opened on the bottom plate and the other parts are opened on the top plate.

[0015] Furthermore, the bayonet is arranged along the width direction of the substrate, the first button is arranged along the width direction of the substrate, and the second button is arranged along the width direction of the substrate; The length of the bayonet, the length of the first button and the length of the second button are all greater than the width of the front tire, the middle tire and the rear tire.

[0016] The present invention further provides a method for testing a tire blowout in an automobile, using the aforementioned tire blowout testing device. Before the test, the locking member locks the bayonet in the retracted position, and the limiting member restricts the first button from being pressed downward. The testing method includes: The car drives toward the base plate, and its front tire passes over the bayonet and the first button, and the limiting member restricts the first button from being pressed down by the front tire; The front tire moves toward the second button and presses the second button downward, thereby releasing the restriction on the first button from being pressed downward by the limiting member; The middle tire of the vehicle passes over the bayonet, drives toward the first button and presses the first button downward, thereby releasing the locking member from locking the bayonet; the driving member drives the bayonet to rotate from the retracted position to the extended position; The rear tire of the car drives towards the bayonet, and the blade of the bayonet punctures the rear tire.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the present invention, the bayonet is rotatably mounted on a base plate and can be switched between a retracted position and an extended position. The locking mechanism includes a locking member, a first button, a limiter, and a second button. For a three-axle vehicle having front, middle, and rear tires, when a tire blowout test is performed on the rear tire, it is necessary to ensure that the front and middle tires are not accidentally punctured during the test. When the front and middle tires pass over the bayonet, the bayonet is in the retracted position, thereby ensuring that the front and middle tires are not accidentally punctured by the bayonet. When the front tire presses against the first button, the limiter restricts the first button from being pressed downward, preventing the front tire from pressing the first button and unlocking the locking member. Only when the front tire moves over the second button, first releasing the limiter from restricting the first button, and then the middle tire moves over the first button, can the first button be pressed, releasing the locking member from locking the bayonet. The driving member (i.e., the torsion spring) then rotates the bayonet to the extended position, with the bayonet's blade extending upward and obliquely out of the first mounting slot. When the rear tire of a car drives up to the bayonet, the blade of the bayonet, extending upward at an angle, punctures the rear tire, simulating a rear tire blowout. The tire blowout test device has a simple overall structure and can accurately cause a rear tire blowout on a three-axle car while effectively preventing accidental punctures of the front and center tires.

[0019] In the present invention, a stopper is provided on the base plate, and the stopper has a stopper bevel. When the bayonet is rotated to the extended position, a side surface of the bayonet abuts and fits against the stopper bevel. When the rear tire of the car reaches the bayonet, the stopper bevel abuts against the side surface of the bayonet, ensuring that the bayonet remains firmly in the extended position, thereby enabling the bayonet blade to puncture the rear tire of the car.

[0020] In the present invention, the driving member is configured as a torsion spring. When the bayonet is in the retracted position, the bayonet compresses the torsion spring. When the locking member locked on the bayonet releases the bayonet, the restoring torque of the torsion spring drives the bayonet to rotate to the extended position. The structure is simple, the cost is low, and the response is sensitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of the bayonet of the automobile tire bursting device of the present invention in the retracted position; Figure 2 for Figure 1 Schematic diagram of the structure of the middle bayonet switching to the extended position; Figure 3 for Figure 2 Schematic diagram of the floor plan; Figure 4 for Figure 1 Schematic diagram of the structure after removing the substrate and the driving components; Figure 5 for Figure 4 Structural diagram from another perspective; Figure 6for Figure 4 Exploded view after removing the spring; Figure 7 This is a schematic diagram of the structure where the bayonet, locking member and limiting member are installed on the base plate; Figure 8 This is an exploded view of the base plate.

[0022] In the picture: 1. Base plate; 11. Top plate; 12. Bottom plate; 13. Limit block; 100. First limiting groove; 101. First mounting groove; 102. Second mounting groove; 103. Third mounting groove; 104. First chute; 105. Second chute; 110. First slope; 120. Second slope; 130. Limiting slope; 2. Bayonet; 20. Rotating shaft; 21. Second limiting groove; 22. Bushing; 23. Blade; 220. Locking groove; 3. Locking mechanism; 30. Locking member; 31. First button; 32. Limiting member; 33. Second button; 34. First return spring; 35. First tensioning spring; 36. Second return spring; 37. Second tensioning spring; 301. Lock tongue; 302. First driven inclined plane; 311. First driving inclined plane; 321. Second driven inclined plane; 331. Second driving inclined plane; 4. Driving parts. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] Example 1:

[0029] like Figure 1-Figure 4 As shown, a tire blowout test device for a car of this embodiment can ensure accurate blowout of the rear tire of a three-axle car. The bottom of the three-axle car is provided with a front tire, a middle tire and a rear tire in sequence. The test device of this embodiment includes: A base plate 1 is provided with a first mounting groove 101 with an upward opening; The bayonet 2 is rotatably disposed in the first mounting slot 101. The bayonet 2 has a retracted position and an extended position in the first mounting slot 101. When the bayonet 2 is in the retracted position, the bayonet 2 is accommodated in the first mounting slot 101. When the bayonet 2 is in the extended position, the blade 23 of the bayonet 2 extends obliquely upward from the first mounting slot 101. The locking mechanism 3 and the driving member 4 include a locking member 30, a first button 31, a limiting member 32, and a second button 33. The locking member 30 is movably arranged on the base plate 1 and can lock the bayonet 2 in the retracted position; the first button 31 is movably arranged on the base plate 1 and movably counteracts the locking member 30. The first button 31 can drive the locking member 30 to release the lock of the bayonet 2; the limiting member 32 is movably arranged below the first button 31 and can limit the first button 31 from being pressed downward; the second button 33 is movably arranged on the base plate 1 and movably counteracts the limiting member 32. The second button 33 can drive the limiting member 32 to release the downward pressure restriction on the first button 31; the driving member 4 can drive the bayonet 2 to switch from the retracted position to the extended position; In actual use, the front tire of the vehicle first presses against the second button 33, releasing the downward pressure restriction of the first button 31 by the stopper 32. Then, the middle tire of the vehicle presses against the first button 31, releasing the lock 30 on the bayonet 2, and the driver 4 drives the bayonet 2 from the retracted position to the extended position. Finally, the rear tire of the vehicle presses against the bayonet 2, and the blade 23 of the bayonet 2 punctures the rear tire.

[0030] In this embodiment, the bayonet 2 is rotatably arranged on the base plate 1, and the bayonet 2 can be switched between a retracted position and an extended position. The locking mechanism 3 includes a locking member 30, a first button 31, a limiting member 32 and a second button 33. For a three-axle vehicle, it has a front tire, a middle tire and a rear tire. When a tire blowout test is required for the rear tire, it is necessary to ensure that the front tire and the middle tire will not be accidentally punctured during the test. When the front tire and the middle tire pass over the bayonet 2, the bayonet 2 is in the retracted position, thereby ensuring that the front tire and the middle tire will not be accidentally punctured by the bayonet 2. When the front tire presses on the first button 31, the limiting member 32 limits the first button 31 from being pressed down, so the front tire cannot press the first button 31 down, thereby unlocking the locking member 30. Only when the front tire reaches the second button 33, first causing the limiter 32 to release the downward pressure on the first button 31, and then the middle tire reaches the first button 31, can the first button 31 be pressed down, causing the locking member 30 to release the lock on the bayonet 2. The driver 4 (i.e., the torsion spring) then rotates the bayonet 2 to the extended position, and the blade 23 of the bayonet 2 extends upward at an angle from the first mounting slot 101. When the rear tire of the vehicle reaches the bayonet 2, the blade 23 of the bayonet 2, extending upward at an angle, punctures the rear tire, simulating a rear tire blowout. This tire blowout test device has a simple overall structure and can accurately cause a rear tire blowout on a three-axle vehicle while effectively preventing accidental punctures of the front and middle tires.

[0031] Combine Figure 1-Figure 3 In this embodiment, when the bayonet 2 is in the retracted position, one side of the bayonet 2 is attached to the base plate 1, and the bayonet 2 is completely contained in the first mounting groove 101. The bayonet 2 is now in a horizontal state or a nearly horizontal state, and the blade 23 of the bayonet 2 is also in a horizontal position. At this time, the bayonet 2 cannot puncture the tire of the car. The rotation angle of the bayonet 2 from the retracted position to the extended position is less than ninety degrees. Specifically, the rotation angle of the bayonet 2 from the retracted position to the extended position is between 70 degrees and 80 degrees, for example, preferably 75 degrees. When the car tire moves toward the bayonet 2 in the extended position, the bayonet 2 forms an angle of approximately 75 degrees with the horizontal plane, so that the bayonet 2 is close to the outer contour of the vertical tire, puncturing the tire.

[0032] Furthermore, a limiting slope 130 is provided on the base plate 1. When the bayonet 2 is rotated to the outward position, the side wall of the bayonet 2 presses against the limiting slope 130, so that when the rear tire presses against the bayonet 2, the bayonet 2 remains in the outward position. The limiting slope 130 can be set integrally with the base plate 1.

[0033] Of course, the limiting bevel 130 can also be set separately from the base plate 1. That is, in this embodiment, a limiting block 13 is provided at each end of the base plate 1 near the bayonet 2. The limiting block 13 is detachably fixedly connected to the base plate 1. Specifically, the limiting block 13 is detachably fixedly connected to the base plate 1 by bolts, ensuring that the limiting block 13 is easy to disassemble and assemble. The limiting block 13 is located in the first mounting groove 101, and the limiting bevel 130 is located on the limiting block 13. The limiting bevel 130 is set on the limiting block 13, and the limiting block 13 is detachably fixedly connected to the base plate 1. The processing of the limiting bevel 130 is convenient. Moreover, when it is necessary to adjust the inclination angle of the bayonet 2 in the extended position, it can be achieved by replacing the limiting block 13. For example, limiting blocks 13 with inclination angles of 70 degrees, 75 degrees, 80 degrees, and 85 degrees can be prepared in advance. The corresponding limiting block 13 is selected according to the test needs.

[0034] In actual use, the base plate 1 of this embodiment is provided with a stopper 13 having a stopper slope 130. When the bayonet 2 is rotated to the extended position, a side surface of the bayonet 2 abuts against and fits against the stopper slope 130. When the rear tire of the vehicle approaches the bayonet 2, the stopper slope 130 abuts against the side surface of the bayonet 2, ensuring that the bayonet 2 remains firmly in the extended position, thereby enabling the blade 23 of the bayonet 2 to puncture the rear tire of the vehicle.

[0035] Specifically, the bayonet 2 in this embodiment is hinged to the base plate 1 via a rotating shaft 20. The two ends of the rotating shaft 20 extend from the two ends of the bayonet 2 and are hinged to the base plate 1. To facilitate the installation of the rotating shaft 20, a blind hole is provided on the base plate 1, passing through one side of the base plate 1. The rotating shaft 20 can be inserted into the blind hole from the open side of the blind hole to hinge the bayonet 2 to the base plate 1. After installation, a bolt is provided at the open end of the blind hole. The bolt can prevent the rotating shaft 20 from disengaging from the blind hole, thereby ensuring the structural stability of the rotating shaft 20 during use.

[0036] The driving member 4 is configured as a torsion spring, with a torsion spring mounted on each end near the rotating shaft 20. This allows the bayonet 2 to be quickly rotated to the extended position, ensuring balanced force during rotation. One torsion spring arm abuts against the base plate 1, while the other torsion spring arm abuts against the sidewall of the bayonet 2. The torsion force of the torsion spring forces the bayonet 2 toward the extended position. When the bayonet 2 is in the retracted position, the torsion spring is compressed.

[0037] Among them, the torsion arm of the torsion spring is set in an L shape, and a first limiting groove 100 is provided on the base plate 1, and a second limiting groove 21 is provided on the side wall of the bayonet 2. The first limiting groove 100 and the second limiting groove 21 are both set as rectangular grooves. The two torsion arms of the torsion spring are respectively set in the first limiting groove 100 and the second limiting groove 21. The first limiting groove 100 and the second limiting groove 21 respectively limit the two torsion arms of the torsion spring to ensure that during use, the two torsion arms of the torsion spring will not slip on the bayonet 2 and the base plate 1, thereby causing the bayonet 2 to become unstable.

[0038] The bayonet 2 of this embodiment includes a sleeve 22 and a plurality of blades 23 arranged axially along the sleeve 22. A rotating shaft 20 is disposed within the sleeve 22. The bayonet 2 has a notch at each end near the sleeve 22, which facilitates the installation of a torsion spring. A locking groove 220 is provided on the sleeve 22, facing away from the blades 23. A locking member 30 is provided with a locking tongue 301, which locks into the locking groove 220, locking the bayonet 2 in the retracted position. When the bayonet 2 is in the retracted position, the locking groove 220 on the sleeve 22 is horizontally or substantially horizontally aligned with the locking tongue 301 of the locking member 30, facilitating smooth locking of the locking tongue 301. When the bayonet 2 is rotated to the extended position, the locking slot 220 is no longer in a horizontal position and is no longer aligned with the locking tongue 301. At this time, the locking tongue 301 cannot be locked into the locking slot 220, that is, the locking member 30 cannot lock the bayonet 2 in the extended position.

[0039] In actual use, the driving member 4 of this embodiment is configured as a torsion spring. When the bayonet 2 is in the retracted position, the bayonet 2 compresses the torsion spring. When the locking member 30 locked on the bayonet 2 releases the bayonet 2, the restoring torque of the torsion spring drives the bayonet 2 to rotate to the extended position. This has a simple structure, low cost, and quick response.

[0040] like Figure 4-Figure 7 As shown, in this embodiment, the first button 31 is provided with a first driving bevel 311. Specifically, a driving block protrudes from the middle of the first button 31, and the first driving bevel 311 is located on this driving block, with the first driving bevel 311 positioned downward. The locking member 30 is provided with a first driven bevel 302. Specifically, a driven block is provided at the end of the locking member 30 near the first button 31, and the first driven bevel 302 is located on this driven block. The first driving bevel 311 and the first driven bevel 302 are movably opposed to each other. Preferably, the inclination angle of the first driving bevel 311 is the same as the inclination angle of the first driven bevel 302 to ensure a good fit and stability during transmission.

[0041] During actual use, when the first button 31 is pressed, the first button 31 pushes the first driven inclined surface 302 through the first driving inclined surface 311, causing the locking member 30 to move to the side away from the bayonet 2, thereby causing the locking member 30 to disengage from the locking groove 220 on the bayonet 2, and the locking member 30 releases the lock on the bayonet 2. As long as the locking member 30 releases the lock on the bayonet 2, the torsion force of the driving member 4, i.e., the torsion spring, will drive the bayonet 2 to rotate, causing the bayonet 2 to rotate from the retracted position to the extended position.

[0042] A first return spring 34 is disposed between the first button 31 and the base plate 1. A spring hole is provided in the first button 31, and a spring hole is also provided in the base plate 1. One end of the first return spring 34 is confined within the spring hole in the first button 31, while the other end is confined within the corresponding spring hole in the base plate 1. This ensures that the first return spring 34 does not shift during use. When the first button 31 is pressed, the first return spring 34 is compressed. When the downward pressure on the first button 31 is removed, the return force of the first return spring 34 resets the first button 31, making it easier to press the first button 31 the next time.

[0043] A first tensioning spring 35 is disposed between the locking member 30 and the base plate 1. Similarly, spring holes for mounting the first tensioning spring 35 are provided on the locking member 30 and corresponding locations on the base plate 1. The two ends of the first tensioning spring 35 are positioned in the two spring holes, ensuring that the first tensioning spring 35 does not shift during use. The elastic force of the first tensioning spring 35 causes the locking member 30 to move in its locking direction. When the first button 31 is pressed, unlocking the locking member 30, i.e., when the locking member 30 moves toward the first button 31, the first tensioning spring 35 is compressed. The first tensioning spring 35 remains tensioned on the locking member 30, ensuring that the locking member 30 is securely locked when the bayonet 2 is locked in the retracted position, thereby ensuring that the bayonet 2 remains securely in the retracted position. Furthermore, when the bayonet 2 is rotated from the extended position to the retracted position, as long as the locking groove 220 on the bayonet 2 is aligned with the locking tongue 301 of the locking member 30, the first tensioning spring 35 will drive the locking tongue 301 to lock into the locking groove 220, locking the bayonet 2 in the retracted position.

[0044] During actual use, when the first button 31 is pressed, the first driving inclined surface 311 on the first button 31 squeezes the first driven inclined surface 302 on the locking member 30, and the locking member 30 moves toward the side close to the first button 31. At this time, the locking tongue 301 of the locking member 30 disengages from the locking groove 220 on the bayonet 2, releasing the lock of the bayonet 2, and the torsion force of the torsion spring causes the bayonet 2 to rotate quickly to the extended position.

[0045] Since the locking groove 220 on the bayonet 2 is no longer aligned with the locking tongue 301 of the locking member 30 after the bayonet 2 is rotated to the extended position, the locking tongue 301 cannot be locked into the locking groove 220. Of course, preferably, if it is necessary to further improve the stability of the bayonet 2 in the extended position, a locking groove can be added to the shaft sleeve 22 of the bayonet 2 accordingly. The angle between the locking groove and the locking groove 220 is the angle that the bayonet 2 rotates from the retracted position to the extended position, for example 75 degrees. When the bayonet 2 is rotated to the extended position, the locking groove on the bayonet 2 is aligned with the locking tongue 301, and the locking tongue 301 is locked into the locking groove, so that the locking member 30 locks the bayonet 2 in the extended position.

[0046] Furthermore, in this embodiment, a second driving bevel 331 is provided on the second button 33. Specifically, a driving block protrudes from the middle of the second button 33, and the second driving bevel 331 is located on the driving block, with the second driving bevel 331 arranged downward. The structure of the second button 33 is preferably the same as that of the first button 31, so that the second button 33 and the first button 31 can be interchanged during use, reducing installation difficulty and improving versatility. A second driven bevel 321 is provided on the limiting member 32. Specifically, a driven block is provided at one end of the limiting member 32 near the second button 33, and the second driven bevel 321 is located on the driven block. The second driving bevel 331 and the second driven bevel 321 are movably opposed to each other. Preferably, the inclination angle of the second driving bevel 331 is the same as the inclination angle of the second driven bevel 321 to ensure a good fit and stability during transmission.

[0047] During actual use, when the second button 33 is pressed, the second button 33 pushes the second driven inclined surface 321 through the second driving inclined surface 331, so that the limit member 32 moves to the side away from the first button 31, and then the limit member 32 is withdrawn from the bottom of the first button 31. The limit member 32 releases the downward limit on the first button 31, that is, at this time, the first button 31 can be pressed down because the first button 31 is no longer restricted by the limit member 32.

[0048] A second return spring 36 is disposed between the second button 33 and the base plate 1. Corresponding spring holes are provided in the second button 33 and the base plate 1. The ends of the second return spring 36 are restrained within the respective spring holes, ensuring that the second return spring 36 does not shift during use. In actual use, when the second button 33 is pressed, the second return spring 36 is compressed. When the downward pressure on the second button 33 is removed, the elastic force of the second return spring 36 resets the second button 33, making it easier to press it the next time.

[0049] A second tensioning spring 37 is disposed between the stopper 32 and the base plate 1. Corresponding spring holes are provided in the stopper 32 and the base plate 1, with both ends of the second tensioning spring 37 retained within the respective spring holes. The elastic force of the second tensioning spring 37 causes the stopper 32 to move toward the first button 31.

[0050] During actual use, when there is no force acting on the second button 33, the elastic force of the second tensioning spring 37 keeps the limiter 32 below the first button 31, thereby ensuring that the limiter 32 restricts the downward pressure of the first button 31. When the second button 33 is pressed, the second button 33 drives the limiter 32 away from the first button 31, releasing the downward pressure limit on the first button 31. The second tensioning spring 37 is compressed, storing force for the limiter 32 to return to its original position.

[0051] In this embodiment, the bayonet 2 is arranged along the width direction of the substrate 1, the first button 31 is also arranged along the width direction of the substrate 1, and the second button 33 is also arranged along the width direction of the substrate 1; that is, the length direction of the bayonet 2, the length direction of the first button 31 and the length direction of the second button 33 are all consistent with the width direction of the substrate 1, and the bayonet 2, the first button 31 and the second button 33 are parallel and spaced apart.

[0052] The lengths of the bayonet 2, the first button 31, and the second button 33 are all greater than the widths of the front, middle, and rear tires. This ensures that when the vehicle is traveling at high speed on the base plate 1, the front and middle tires can accurately press against the second button 33 and the first button 31, and that the bayonet 2 can accurately puncture the rear tire. The first and second buttons 31 and 33 are each provided with a plurality of ridges having a semicircular cross section along their lengths, with multiple ridges arranged side by side to facilitate the tire pressing the corresponding button.

[0053] Furthermore, the distance between the first button 31 and the second button 33 generally needs to be smaller than the distance between the front tire and the middle tire, ensuring that after the front tire presses the second button 33, the middle tire has not yet moved onto the first button 31, or has just reached the first button 31. Furthermore, after the front tire presses the second button 33 and the limiter 32 releases the downward limit on the first button 31, the middle tire can press the first button 31. Furthermore, the distance between the first button 31 and the bayonet 2 generally needs to be smaller than the distance between the middle tire and the rear tire, ensuring that after the middle tire presses the first button 31, the rear tire has not yet reached the bayonet 2 in the extended position, thereby ensuring that the bayonet 2 can puncture the rear tire.

[0054] like Figure 8As shown, the two ends of the substrate 1 of this embodiment are respectively provided with a first slope portion 110 and a second slope portion 120. The first slope portion 110 and the second slope portion 120 can ensure the stability of the car when it drives onto the substrate 1 and when it drives away from the substrate 1. The inclination angles of the first slope portion 110 and the second slope portion 120 can be set to about 10 degrees.

[0055] A second mounting groove 102 and a third mounting groove 103 are sequentially provided on the substrate 1. The first button 31 can be raised and lowered in the second mounting groove 102, and the second button 33 can be raised and lowered in the third mounting groove 103. Similar to the first mounting groove 101, the second mounting groove 102 and the third mounting groove 103 also have upward openings.

[0056] The base plate 1 is further provided with a first slide groove 104 and a second slide groove 105. The locking member 30 is slidably disposed in the first slide groove 104 to achieve telescopic movement of the locking member 30. The limiting member 32 is slidably disposed in the second slide groove 105 to achieve telescopic movement of the limiting member 32.

[0057] Specifically, in this embodiment, the base plate 1 includes a detachably connected bottom plate 12 and a top plate 11. The top plate 11 and bottom plate 12 are secured by bolts, ensuring easy assembly and disassembly between the top and bottom plates 11. The first mounting slot 101, the second mounting slot 102, the third mounting slot 103, the first slide slot 104, and the second slide slot 105 are at least partially defined on the bottom plate 12, and the remaining portion is defined on the top plate 11. It should be noted that if the base plate 1 were not configured as a separate bottom plate 12 and top plate 11, but rather as a single-piece base plate 1, it would be inconvenient to machine the first slide slot 104 and the second slide slot 105 into the base plate 1, and installation of the bayonet 2, the locking member 30, and the stopper 32 would also be inconvenient. However, configuring the base plate 1 as a separate bottom plate 12 and top plate 11 not only facilitates machining the slots and holes within the base plate 1, but also facilitates installation of the corresponding components within the corresponding slots and holes.

[0058] The working principle of the automobile tire blowout test device in this embodiment is as follows: The vehicle's front wheel presses against the second button 33. The second driving bevel 331 on the second button 33 squeezes the second driven bevel 321 on the stopper 32, causing the stopper 32 to move away from the first button 31 and release the downward pressure on the first button 31. The vehicle's middle tire presses against the first button 31. The first driving bevel 311 on the first button 31 squeezes the first driven bevel 302 on the locking member 30, causing the locking member 30 to move away from the bayonet 2. The locking tongue 301 of the locking member 30 disengages from the locking slot 220 on the bayonet 2, releasing the lock on the bayonet 2. The torsion force of the torsion spring drives the bayonet 2 from the retracted position to the extended position. The vehicle's rear tire drives toward the bayonet 2, and the upwardly angled blade 23 of the bayonet 2 punctures the rear tire, achieving the purpose of accurately puncturing the rear tire of the three-axle vehicle.

[0059] Example 2:

[0060] A method for testing a tire blowout in an automobile according to this embodiment is provided. The tire blowout testing device in the first embodiment is used. Before the test, the locking member 30 locks the bayonet 2 in the retracted position, and the limiting member 32 restricts the first button 31 from being pressed downward. The testing method includes: First, a car drives toward the base plate 1, and the front tire of the car passes over the bayonet 2. At this time, the bayonet 2 is in the retracted position and will not puncture the front tire. Then, the front tire passes over the first button 31. At this time, the limiter 32 prevents the first button 31 from being pressed down by the front tire.

[0061] The front tire then approaches the second button 33 and presses it downward, releasing the downward pressure restriction imposed by the stopper 32 on the first button 31. The vehicle's middle tire then passes over the bayonet 2, which is in the retracted position and will not puncture the front tire. The middle tire then approaches the first button 31 and presses it downward, releasing the lock 30 on the bayonet 2. The driver 4 then rotates the bayonet 2 from the retracted position to the extended position, with the stopper 13 maintaining the bayonet 2 in the extended position.

[0062] Finally, the rear tire of the car drives towards the bayonet 2, and the blade 23 of the bayonet 2 tilted upward punctures the rear tire.

[0063] In this solution, the automobile tire blowout test device can accurately cause the rear tire of a three-axle automobile to blow out, while effectively preventing its front tire and middle tire from being accidentally punctured, and the overall structure is simple and the cost is low.

Claims

1. A tire blowout test device for a car, wherein the bottom of the car is provided with a front tire, a middle tire and a rear tire in sequence, characterized in that: The test device comprises: A base plate, wherein the base plate is provided with a first mounting groove with an upward opening; The bayonet is rotatably disposed in the first mounting slot, and the bayonet has a retracted position and an extended position in the first mounting slot. When the bayonet is in the retracted position, the bayonet is accommodated in the first mounting slot; when the bayonet is in the extended position, the blade of the bayonet obliquely extends upward from the first mounting slot. A locking mechanism and a driving member, wherein the locking mechanism includes a locking member, a first button, a limiting member, and a second button, wherein the locking member is movably arranged on the base plate and can lock the bayonet in the retracted position; the first button can be raised and lowered on the base plate and movably counteract the locking member, and the first button can drive the locking member to release the lock of the bayonet; the limiting member is movably arranged below the first button and can limit the first button from being pressed downward; the second button can be raised and lowered on the base plate and movably counteract the limiting member, and the second button can drive the limiting member to release the downward restriction on the first button; the driving member can drive the bayonet to switch from the retracted position to the extended position; The front tire of the vehicle first presses onto the second button, thereby releasing the restriction on the first button from being pressed downward by the limiting member; The middle tire of the car presses onto the first button from behind, releasing the locking member from locking the bayonet, and the driving member drives the bayonet to switch from the retracted position to the extended position; The rear tire of the automobile is finally pressed against the bayonet, and the bayonet punctures the rear tire.

2. The automobile tire burst test device according to claim 1, characterized in that: The bayonet rotates from the retracted position to the extended position at an angle of less than ninety degrees; A limiting slope is provided on the base plate. When the bayonet rotates to the outward position, the side wall of the bayonet abuts against the limiting slope, so that when the rear tire is pressed against the bayonet, the bayonet remains in the outward position.

3. The automobile tire burst test device according to claim 2, characterized in that: The bayonet rotates from the retracted position to the extended position at an angle between 70 and 80 degrees; A limit block is respectively provided on both ends of the base plate close to the bayonet. The limit block is detachably fixedly connected to the base plate, and the limit block is located in the first mounting groove; the limit slope is located on the limit block.

4. The automobile tire burst test device according to claim 1, characterized in that: The bayonet is hinged on the base plate via a rotating shaft; The driving member is configured as a torsion spring, and a torsion spring is sleeved on each of the two ends of the rotating shaft, one torsion arm of the torsion spring abuts against the base plate, and the other torsion arm of the torsion spring abuts against the side wall of the bayonet; When the bayonet is in the retracted position, the torsion spring is in a compressed state.

5. The automobile tire burst test device according to claim 4, characterized in that: The torsion arm is arranged in an L shape; A first limiting groove is provided on the base plate, a second limiting groove is provided on the side wall of the bayonet, and the two torsion arms of the torsion spring are respectively arranged in the first limiting groove and the second limiting groove.

6. The automobile tire burst test device according to claim 4, characterized in that: The bayonet includes a sleeve and a plurality of blades arranged axially along the sleeve, and the rotating shaft is inserted into the sleeve; A locking groove is provided on the shaft sleeve in a direction away from the blade, and a locking tongue is provided on the locking member. The locking tongue can be locked into the locking groove to lock the bayonet in the retracted position.

7. The automobile tire burst test device according to claim 1, characterized in that: The first button is provided with a first driving inclined surface, and the locking member is provided with a first driven inclined surface, wherein the first driving inclined surface and the first driven inclined surface are movably opposed to each other; the first button pushes the first driven inclined surface via the first driving inclined surface, causing the locking member to move telescopically, thereby releasing the lock on the bayonet; A first return spring is provided between the first button and the substrate, and when the first button is pressed, the first return spring is compressed; A first tensioning spring is provided between the locking member and the base plate. The elastic force of the first tensioning spring causes the locking member to tend to move in its locking direction. When the first button drives the locking member to unlock, the first tensioning spring is compressed.

8. The automobile tire burst test device according to claim 1, characterized in that: The second button is provided with a second driving inclined surface, and the limiting member is provided with a second driven inclined surface, and the second driving inclined surface and the second driven inclined surface are movably opposed to each other; the second button pushes the second driven inclined surface with the second driving inclined surface, causing the limiting member to move telescopically, thereby releasing the downward limit on the first button; A second return spring is provided between the second button and the substrate, and when the second button is pressed, the second return spring is compressed; A second tensioning spring is provided between the limiting member and the substrate. The elastic force of the second tensioning spring causes the limiting member to tend to move toward the side close to the first button. When the second button drives the limiting member to release the downward limit on the first button, the second tensioning spring is compressed.

9. The automobile tire burst test device according to claim 1, 7 or 8, characterized in that: The two ends of the substrate are respectively provided with a first slope portion and a second slope portion; The substrate is provided with a second mounting groove and a third mounting groove in sequence, the first button is arranged in the second mounting groove so as to be movable up and down, and the second button is arranged in the third mounting groove so as to be movable up and down; The base plate is provided with a first sliding groove and a second sliding groove, the locking member is slidably disposed in the first sliding groove, and the limiting member is slidably disposed in the second sliding groove; The base plate includes a bottom plate and a top plate that are detachably connected, and the first mounting groove, the second mounting groove, the third mounting groove, the first sliding groove and the second sliding groove are at least partially opened on the bottom plate and the other parts are opened on the top plate.

10. The automobile tire burst test device according to claim 1, characterized in that: The bayonet is arranged along the width direction of the substrate, the first button is arranged along the width direction of the substrate, and the second button is arranged along the width direction of the substrate; The length of the bayonet, the length of the first button and the length of the second button are all greater than the widths of the front tire, the middle tire and the rear tire.

11. A method for testing a tire blowout of an automobile, using the tire blowout testing device according to any one of claims 1 to 10, wherein before the test, the locking member locks the bayonet in the retracted position, and the limiting member restricts the first button from being pressed downward, wherein: The test method includes: The car drives toward the base plate, and its front tire passes over the bayonet and the first button, and the limiting member restricts the first button from being pressed down by the front tire; The front tire moves toward the second button and presses the second button downward, thereby releasing the restriction on the first button from being pressed downward by the limiting member; The middle tire of the vehicle passes over the bayonet, drives toward the first button and presses the first button downward, thereby releasing the locking member from locking the bayonet; the driving member drives the bayonet to rotate from the retracted position to the extended position; The rear tire of the car drives towards the bayonet, and the blade of the bayonet punctures the rear tire.

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