CN113029605A - Test device and method for simulating automobile tire burst - Google Patents

Abstract

The invention relates to the technical field of test devices, and discloses a test device and a method for simulating automobile tire burst; the device includes: the cylinder comprises a cylinder body, a sealing diaphragm and a cylinder cover; the cylinder body and the sealing diaphragm enclose a first air chamber, the cylinder body is provided with a plurality of air inlet holes communicated with the first air chamber, the middle part of the cylinder body is protruded with an installation cylinder, the installation cylinder is provided with an air outlet, and the installation cylinder is provided with a first coil; the cylinder cover and the sealing diaphragm enclose a second air chamber, and a second coil is arranged on the cylinder cover; a pressing plate is arranged on the sealing membrane; the control mechanism comprises a reversing valve and an electromagnetic coil; the reversing valve is provided with a first vent hole, a second vent hole and a third vent hole; when the electromagnetic coil is not electrified, the first vent hole is communicated with the third vent hole so as to enable the pressure of the second air chamber to be equal to that of the first air chamber; when the electromagnetic coil is electrified, the first vent hole is communicated with the second vent hole so as to release the air pressure of the second air chamber. The device and the method have the advantages of stable signal transmission, high reliability and light weight.

Description

Test device and method for simulating automobile tire burst

Technical Field

The invention relates to the technical field of test devices, in particular to a test device and a method for simulating automobile tire burst.

Background

The invention relates to the technical field of test devices, in particular to a test device and a test method for simulating automobile tire burst.

As patent "CN 112014124B" discloses a testing device for simulating tire burst, comprising: the cylinder body is provided with a plurality of first through holes; the cover body is arranged above the cylinder body, a pressure maintaining space is arranged between the cover body and the cylinder body, and the cover body can move up and down relative to the cylinder body to seal or open the pressure maintaining space; the mounting plate is used for fixing the cylinder body and the driving cylinder; the mounting disc is provided with a plurality of through grooves along the radius direction, and the plurality of through grooves can be randomly formed into at least two groups of through groove groups for adapting to tires with different specifications; and the acquisition controller is arranged on the driving cylinder and used for controlling the driving cylinder to stretch and acquire tire pressure parameters. In this scheme, set up the inner chamber that a plurality of first through-holes connect pressurize space and tire on the cylinder body, when the pressure release was opened in the pressurize space, a plurality of first through-holes acted simultaneously, and the tire inner chamber's atmospheric pressure is sharply reduced in the twinkling of an eye for tire inner chamber pressure release is rapider, so that the simulation process of blowing out is truer. However, in the actual test process, the following problems are found: the signal transmission is realized through wireless transmission, and the anti-interference capability of the automobile tire rotating at high speed is poor, so that the signal is easy to be unstable, and the test effect is further influenced; the air vent is blocked or quickly decompressed through the telescopic motion of the air cylinder, the sealing strength of the air vent depends on the diameter of the air cylinder, and the situation of air leakage caused by poor sealing is easy to occur; and the weight of the air cylinder is heavier, so that the burden of the automobile tire during rotation is increased, and the test process is easily influenced.

Disclosure of Invention

In view of the above disadvantages in the prior art, the present invention provides a test device and method for simulating a tire burst, which has a simple structure, high stability and convenient maintenance.

The invention solves the technical problem and adopts the technical scheme that a test device for simulating automobile tire burst is provided, which comprises:

the cylinder body, the sealing diaphragm and the cylinder cover are arranged in sequence; the cylinder body and the sealing diaphragm enclose a first air chamber, a plurality of air inlet holes which are communicated with the first air chamber and are used for being connected with a tire are formed in the cylinder body along the circumferential direction of the cylinder body, an installation cylinder protrudes from the middle of the cylinder body, an air outlet which is communicated with the first air chamber is formed in the installation cylinder, and a first coil is arranged on the installation cylinder; the cylinder cover is detachably connected with the cylinder body, a second air chamber is defined by the cylinder cover and the sealing diaphragm, and a second coil is arranged on the cylinder cover; a pressing plate for attracting the first coil and the second coil is arranged on the sealing membrane;

the control mechanism is arranged on the cylinder cover and comprises a reversing valve and an electromagnetic coil; the reversing valve is provided with a first vent hole, a second vent hole and a third vent hole; the first vent hole is communicated with the second air chamber, the second vent hole is communicated with the outside, and the third vent hole is communicated with the first air chamber; the electromagnetic coil is used for controlling the first vent hole to be communicated with the third vent hole or controlling the first vent hole to be communicated with the second vent hole;

when the electromagnetic coil is not electrified, the first vent hole is communicated with the third vent hole, so that the pressure of the second air chamber is equal to that of the first air chamber; when the electromagnetic coil is electrified, the first vent hole is communicated with the second vent hole so as to release the air pressure of the second air chamber.

Further, the control mechanism comprises a mounting seat and an air pressure sensor arranged on the mounting seat; the air pressure sensor is used for monitoring the air pressure of the tire and/or the air pressure of the first air chamber and/or the air pressure of the second air chamber.

Further, the control mechanism further comprises a sliding wire connector arranged on the mounting seat;

the sliding wire connector comprises a base, a third coil group, a sliding sleeve, a fourth coil group and a contact finger assembly, wherein the base is arranged on the mounting base, the third coil group is arranged on the base, the sliding sleeve is rotatably arranged on the base, and the fourth coil group is arranged on the sliding sleeve and is separated from the third coil group; the finger assembly is connected between the third coil assembly and the fourth coil assembly.

Further, the contact finger assembly comprises a supporting seat, a screw, a contact finger and a spring; the supporting seat is fixed on the fourth coil group through the screw, and a mounting hole is formed in the supporting seat; the contact finger is telescopically arranged in the mounting hole in a penetrating manner, and one end, far away from the fourth coil group, of the contact finger movably abuts against the third coil group; the spring is arranged between the screw and the contact finger.

Further, the third coil group comprises a plurality of third coils arranged at intervals from inside to outside, and the fourth coil group comprises a plurality of fourth coils arranged at intervals from inside to outside; and the third coils correspond to the fourth coils one by one, and the contact finger assemblies are connected between the third coils and the fourth coils.

Furthermore, the sliding sleeve protrudes an insulating ring along two adjacent fourth coils, and two adjacent fourth coils are respectively arranged on the inner side and the outer side of the insulating ring.

Furthermore, the central line of the sliding wire connector, the central line of the mounting seat, the central line of the cylinder cover and the central line of the cylinder body are all overlapped.

Furthermore, the mounting seat is also provided with a connector for connecting a tire air tap, and the connector is communicated with the air pressure sensor.

The technical scheme adopted by the invention for solving the technical problem is that the invention also provides a test method for simulating automobile tire burst, and the test device for simulating automobile tire burst comprises the following steps:

a plurality of through holes are formed in the automobile tire, so that the through holes correspond to the air inlet holes one by one and are communicated with the air inlet holes;

enabling the first coil to suck the pressure plate, and enabling the sealing diaphragm to seal the exhaust port;

controlling the electromagnetic coil to be not electrified so that a first vent hole of the reversing valve is communicated with a third vent hole, and a first air chamber is communicated with a second air chamber; the air in the automobile tire enters the first air chamber and the second air chamber, and the air pressures of the automobile tire, the first air chamber and the second air chamber are balanced and equal;

and controlling the electromagnetic coil to be electrified to enable the first vent hole and the second vent hole of the reversing valve to be communicated, the second air chamber to be communicated with the outside, and meanwhile, attracting the pressing plate by the second coil to open the sealing diaphragm from the exhaust port, so that the air pressure of the automobile tire is instantly reduced.

Compared with the prior art, the invention has at least the following beneficial effects:

according to the invention, a cylinder structure is cancelled, the overall quality of the tire burst simulation device is reduced, the influence of the tire burst simulation device on the high-speed rotation of the automobile tire is reduced, and the test accuracy is improved; the sealing or instant air release is controlled without depending on the expansion and contraction of the cylinder, and the structural stability is high; under the condition that the electromagnetic coil is not electrified, the first vent hole and the third vent hole of the reversing valve are controlled to be communicated, so that the first air chamber, the second air chamber and the automobile tire are communicated, the air pressure values of the first air chamber, the second air chamber and the automobile tire are equal, the pressing plate is sucked downwards under the action of the suction force of the first coil, the sealing diaphragm is driven to seal the exhaust port, and tight sealing can be realized by small suction force; when a tire burst needs to be simulated, the electromagnetic coil is electrified, the first vent hole and the second vent hole of the reversing valve are controlled to be communicated, the second air chamber is communicated with the outside, the pressure of the second air chamber is released instantly, meanwhile, the second coil attracts the pressing plate, the pressing plate drives the sealing diaphragm to open the exhaust port, the sealing diaphragm can be quickly opened from the exhaust port under the dual action of the air pressure difference between the second coil and the first air chamber and between the second coil and the second air chamber, the exhaust efficiency is high, and the tire burst situation is simulated. And the whole device is positioned at the axle center of the automobile tire, so that the centrifugal force of the device is small and the dynamic balance effect is better when the tire rotates at high speed.

According to the invention, the condition that the wireless communication signal of the original tire burst test device is unstable is improved, the wireless signal transmission is changed into the wire transmission, under the condition that the automobile tire rotates at a high speed, the third coil group and the fourth coil group are connected through the contact finger assemblies, and each third coil or each fourth coil is provided with four contact finger assemblies along the circumferential direction of the third coil or the fourth coil, so that the wiring is convenient; and the contact finger always ensures the propping with the third coil under the elastic force action of the spring, compared with wireless signal transmission, the signal transmission is more stable through wired connection, and the winding condition of the electric wire can be prevented through the sliding wire connector. After the long-time use, even if the contact finger is worn, the wear compensation can be performed under the elastic force action of the spring, the contact finger assembly cannot lose effectiveness, and the service life is long; when the single contact finger assembly is damaged, the overall use effect of the device cannot be influenced, and the reliability is high.

Drawings

FIG. 1 is a schematic view of the whole structure of the tire burst simulation device of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of the assembly of the cylinder block, sealing diaphragm and cylinder head;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is an exploded view of the reversing valve, solenoid coil, mounting block, and pneumatic pressure sensor;

FIG. 6 is a schematic half-section view of FIG. 3;

FIG. 7 is an exploded view of the sliding wire connector;

FIG. 8 is a schematic half-section view of a finger assembly;

FIG. 9 is a schematic structural view of the sliding sleeve;

FIG. 10 is a schematic view of a method for simulating a tire burst of an automobile.

In the figure:

1. a cylinder body; 10. a first air chamber; 11. an air inlet; 12. mounting the cylinder; 120. an exhaust port; 13. a first coil;

2. sealing the membrane; 20. a second air chamber; 21. pressing a plate;

3. a cylinder cover; 30. a second coil; 3A, a first opening; 3B, a second opening;

4. a control mechanism; 40. a diverter valve; 401. a first vent hole; 402. a second vent hole; 403. a third vent hole; 41. an electromagnetic coil; 42. a mounting seat; 421. an interface; 43. an air pressure sensor; 44. a sliding wire connector; 441. a base; 442. a third coil group; 4421. a third coil; 443. a sliding sleeve; 4431. An insulating ring; 4432. an accommodating chamber; 444. a fourth coil group; 4441. a fourth coil; 445. a finger assembly; 4450. a supporting seat; 4451. a screw; 4452. a contact finger; 4453. a spring; 45. a connecting pipe; 50. And a bearing.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 9, a test device for simulating a tire burst of an automobile comprises: the cylinder body 1, the sealing diaphragm 2 and the cylinder cover 3 are arranged in sequence; the cylinder body 1 and the sealing diaphragm 2 enclose a first air chamber 10, and the cylinder body 1 is provided with a plurality of air inlet holes 11 which are communicated with the first air chamber 10 and are used for being connected with tires along the circumferential direction of the cylinder body 1, in the scheme, six air inlet holes 11 are uniformly distributed along the circumferential direction of the cylinder body 1, the specific number of the air inlet holes can be selected according to requirements, correspondingly, six holes need to be formed in the side surface of the tire and are respectively communicated with the six air inlet holes 11, and the air of the tire can rapidly enter the first air chamber 10; a mounting cylinder 12 protrudes from the middle of the cylinder body 1, an exhaust port 120 communicated with the first air chamber 10 is formed in the mounting cylinder 12, a first coil 13 is arranged on the mounting cylinder 12, the cross section of the mounting cylinder 12 is gradually reduced from bottom to top, the mounting cylinder is arranged in a partial conical surface mode and is attached to the first coil 13, and therefore the first coil 13 can be conveniently mounted on the mounting cylinder 12; the cylinder cover 3 is detachably connected with the cylinder body 1, specifically, detachably connected through a plurality of bolts arranged along the circumferential direction of the cylinder cover; the cylinder cover 3 and the sealing diaphragm 2 enclose a second air chamber 20, and a second coil 30 is arranged on the cylinder cover 3; the sealing diaphragm 2 is provided with a pressure plate 21 for attracting the first coil 13 and the second coil 30; that is, the pressure plate 21 and the sealing diaphragm 2 may be fixedly disposed, and when the first coil 13 is powered on, the first coil 13 attracts the pressure plate 21 downwards to drive the sealing diaphragm 2 to seal the exhaust port 120, so as to ensure reliable sealing; when the first coil 13 is not electrified and the second coil 30 is electrified, the second coil 30 attracts the pressing plate 21 upwards to drive the sealing diaphragm 2 to withdraw from the exhaust port 120 instantly, so that the pressure of the tire is conveniently and rapidly relieved, and the actual tire burst situation is simulated.

The control mechanism 4 is arranged on the cylinder head 3 and comprises a reversing valve 40 and an electromagnetic coil 41; a first vent hole 401, a second vent hole 402 and a third vent hole 403 are arranged on the reversing valve 40; the first vent 401 is communicated with the second air chamber 20, the second vent 402 is communicated with the outside, and the third vent 403 is communicated with the first air chamber 10; the electromagnetic coil 41 is used for controlling the first ventilation hole 401 to communicate with the third ventilation hole 403, or controlling the first ventilation hole 401 to communicate with the second ventilation hole 402. Specifically, when the electromagnetic coil 41 is not energized, the first vent hole 401 communicates with the third vent hole 403, so that the pressures of the second air chamber 20 and the first air chamber 10 are equalized; the exhaust port 120 can be sealed by ensuring the small suction force of the first coil 13 without the help of the driving force of driving pieces such as an air cylinder, an oil cylinder and the like, the structure is simple and light, and the sealing effect is better. When the electromagnetic coil 41 is energized, the first vent hole 401 on the reversing valve 40 is communicated with the second vent hole 402 to release the air pressure of the second air chamber 20, so that the pressure of the second air chamber 20 is rapidly reduced, and under the action of the pressure difference between the first air chamber 10 and the second air chamber 20 and the suction force of the second coil 30, the sealing diaphragm 2 is subjected to double actions, so that the exhaust port 120 is rapidly opened, the air pressure of the tire is instantly released, and the actual tire burst of the automobile is simulated.

In the actual use process, the original air cylinder structure is cancelled, the overall quality of the tire burst simulation device is reduced, the influence of the tire burst simulation device on the high-speed rotation of the automobile tire is reduced, and the test accuracy is improved; the sealing or instant air release is controlled without depending on the expansion and contraction of the cylinder, and the structural stability is high; under the condition that the electromagnetic coil 41 is not electrified, the first vent hole 401 and the third vent hole 403 of the reversing valve 40 are controlled to be communicated, so that the first air chamber 10, the second air chamber 20 and the automobile tire are communicated, the air pressure values of the first air chamber 10, the second air chamber 20 and the automobile tire are equal, the pressure plate 21 is sucked downwards under the action of the suction force of the first coil 13, the sealing diaphragm 2 is driven to seal the exhaust port 120, and the sealing tightness can be realized by small suction force; when a tire burst situation needs to be simulated, the electromagnetic coil 41 is electrified, the first vent hole 401 and the second vent hole 402 of the reversing valve 40 are controlled to be communicated, the second air chamber 20 is communicated with the outside, the pressure of the second air chamber 20 is released instantly, meanwhile, the second coil 30 attracts the pressing plate 21, the pressing plate 21 drives the sealing diaphragm 2 to open the exhaust port 120, the sealing diaphragm 2 can be quickly opened from the exhaust port 120 under the double effects of the air pressure difference between the second coil 30 and the first air chamber 10 and between the second coil 30 and the second air chamber 20, the exhaust efficiency is high, and the tire burst situation can be simulated.

As shown in fig. 5, 7-9, the control mechanism 4 includes an installation base 42 and an air pressure sensor 43 disposed on the installation base 42, the installation base 42 is detachably connected to the cylinder head 3, and a first opening 3A and a second opening 3B (as shown in fig. 3) are disposed on the cylinder head 3, the first opening 3A is for a connection pipe 45 to pass through, the connection pipe 45 connects the first air chamber 10 to the third vent 403, and the second opening 3B is directly connected to the second vent 402, so that the second vent 402 can be connected to the second air chamber 20; the air pressure sensor 43 is used to monitor the air pressure of the tyre and/or the air pressure of the first air chamber 10 and/or the air pressure of the second air chamber 20. Wherein the control mechanism 4 further comprises a sliding wire connector 44 disposed on the mounting seat 42; the sliding connector 44 comprises a base 441, a third coil assembly 442, a sliding sleeve 443, a fourth coil assembly 444 and a finger assembly 445, wherein the base 441 is disposed on the mounting seat 42, the third coil assembly 442 is disposed on the base 441, the sliding sleeve 443 is rotatably disposed on the base 441, a bearing 50 is further disposed in the sliding sleeve 443 to facilitate the rotation of the sliding sleeve 443 so as to reduce the friction force when the sliding sleeve 443 rotates; the fourth coil assembly 444 is disposed on the sliding sleeve 443 and spaced apart from the third coil assembly 442; the finger assembly 445 is connected between the third coil assembly 442 and the fourth coil assembly 444.

Specifically, the finger assembly 445 includes a support seat 4450, a screw 4451, a finger and a spring 4453; the support seat 4450 is fixed on the fourth coil assembly 444 through the screw 4451, and a mounting hole is formed in the support seat 4450; the contact finger is telescopically inserted into the mounting hole, and one end of the contact finger, which is far away from the fourth coil assembly 444, movably abuts against the third coil assembly 442; the spring 4453 is disposed between the screw 4451 and the contact finger. Wherein the third coil group 442 includes a plurality of third coils 4421 spaced from the inside to the outside, and the fourth coil group 444 includes a plurality of fourth coils 4441 spaced from the inside to the outside; and the third and fourth coils 4421 and 4441 are in one-to-one correspondence, and the finger assemblies 445 are connected between the third and fourth coils 4421 and 4441. The number of the third coils 4421 and the fourth coils 4441 in this embodiment is six, and the coils are coaxially arranged, two coils are used for connecting electromagnetic valves in an automobile (two groups of wires), and four coils are used for connecting the air pressure sensor 43 (four groups of wires); and four sets of contact finger assemblies 445 are arranged between the third coil 4421 and the fourth coil 4441 at corresponding positions up and down along the circumferential direction, the number of the contact finger assemblies 445 is twenty-four, and the contact finger assemblies are uniformly distributed between the third coil group 442 and the fourth coil group 444. As shown in fig. 9, the sliding sleeve 443 protrudes an insulating ring 4431 along between two adjacent fourth coils 4441, the two adjacent fourth coils 4441 are respectively disposed on the inner side and the outer side of the insulating ring 4431, and a receiving cavity 4432 is formed between the two insulating rings 4431, so as to prevent the occurrence of information disorder caused by unnecessary contact between the irrelevant finger assemblies 4452 and ensure reliable signal transmission.

In the actual use process, the original tire burst simulation test device is reformed aiming at the unstable situation of wireless communication signals, the wireless signal transmission is changed into the wired transmission, under the condition that the automobile tire rotates at high speed, the third coil group 442 and the fourth coil group 444 are connected through the finger assemblies 445, and each third coil 4421 or each fourth coil 4441 is provided with four finger assemblies 445 along the circumferential direction thereof, so that the wiring is convenient; and the contact finger 4452 is always kept against the third coil 4421 by the elastic force of the spring 4453, the signal transmission is more stable through the wire connection than the wireless signal transmission, and the occurrence of the winding of the electric wire can be prevented by the sliding wire connector 44. After long-time use, even if the contact finger 4452 is worn, under the elastic force action of the spring 4453, wear compensation can be performed, the contact finger assembly 445 cannot lose effectiveness, and the service life is long; when the single contact finger assembly 445 is damaged, the overall use effect of the device is not influenced, and the reliability is high.

Preferably, the center line of the sliding wire connector 44, the center line of the mounting seat 42, the center line of the cylinder head 3, and the center line of the cylinder block 1 all coincide. Namely, the whole tire burst simulation test device is positioned at the axle center of the automobile tire, and when the tire rotates at high speed, the centrifugal force of the device is small, and the dynamic balance effect is better. The mounting seat 42 is further provided with a port 421 for connecting a tire valve, and the port 421 is communicated with the air pressure sensor 43.

As shown in fig. 10, the test method for simulating a tire burst of an automobile according to the present invention, which uses the test apparatus for simulating a tire burst of an automobile, includes the following steps:

a plurality of through holes are formed in the automobile tire, so that the through holes correspond to the air inlet holes 11 one by one and are communicated with the air inlet holes; so that the automobile tire can be quickly deflated;

enabling the first coil 13 to suck the pressure plate 21, and enabling the sealing diaphragm 2 to seal the air outlet 120; it should be explained that, at this time, the first coil 13 is energized, the second coil 30 is not energized, that is, the electromagnetic coil 41 is not energized;

controlling the electromagnetic coil 41 to be not electrified, so that the first vent hole 401 of the reversing valve 40 is communicated with the third vent hole 403, and the first air chamber 10 is communicated with the second air chamber 20; the air in the automobile tire enters the first air chamber 10 and the second air chamber 20, and the air pressures of the automobile tire, the first air chamber 10 and the second air chamber 20 are balanced and equal; namely, the first air chamber 10, the second air chamber 20 and the automobile tire reach a dynamic balance to facilitate sealing the exhaust port 120;

the electromagnetic coil 41 is controlled to be electrified, so that the first vent hole 401 and the second vent hole 402 of the reversing valve 40 are communicated, the second air chamber 20 is communicated with the outside, meanwhile, the second coil 30 attracts the pressing plate 21, the sealing diaphragm 2 is opened from the exhaust port 120, the air pressure of an automobile tire is instantly reduced, and the instant of automobile tire burst is simulated.

In the scheme, the test device and the test method have the advantages of stable signal transmission, high reliability and light weight.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (9)

1. A test device for simulating automobile tire burst is characterized by comprising:

the cylinder body, the sealing diaphragm and the cylinder cover are arranged in sequence; the cylinder body and the sealing diaphragm enclose a first air chamber, a plurality of air inlet holes which are communicated with the first air chamber and are used for being connected with a tire are formed in the cylinder body along the circumferential direction of the cylinder body, an installation cylinder protrudes from the middle of the cylinder body, an air outlet which is communicated with the first air chamber is formed in the installation cylinder, and a first coil is arranged on the installation cylinder; the cylinder cover is detachably connected with the cylinder body, a second air chamber is defined by the cylinder cover and the sealing diaphragm, and a second coil is arranged on the cylinder cover; a pressing plate for attracting the first coil and the second coil is arranged on the sealing membrane;

the control mechanism is arranged on the cylinder cover and comprises a reversing valve and an electromagnetic coil; the reversing valve is provided with a first vent hole, a second vent hole and a third vent hole; the first vent hole is communicated with the second air chamber, the second vent hole is communicated with the outside, and the third vent hole is communicated with the first air chamber; the electromagnetic coil is used for controlling the first vent hole to be communicated with the third vent hole or controlling the first vent hole to be communicated with the second vent hole;

when the electromagnetic coil is not electrified, the first vent hole is communicated with the third vent hole, so that the pressure of the second air chamber is equal to that of the first air chamber; when the electromagnetic coil is electrified, the first vent hole is communicated with the second vent hole so as to release the air pressure of the second air chamber.

2. The test device for simulating the tire burst of the automobile according to claim 1, wherein the control mechanism comprises a mounting seat and an air pressure sensor arranged on the mounting seat; the air pressure sensor is used for monitoring the air pressure of the tire and/or the air pressure of the first air chamber and/or the air pressure of the second air chamber.

3. A test device for simulating a flat tire for a vehicle as claimed in claim 2, wherein said control mechanism further comprises a sliding wire connector provided on said mounting seat;

the sliding wire connector comprises a base, a third coil group, a sliding sleeve, a fourth coil group and a contact finger assembly, wherein the base is arranged on the mounting base, the third coil group is arranged on the base, the sliding sleeve is rotatably arranged on the base, and the fourth coil group is arranged on the sliding sleeve and is separated from the third coil group; the finger assembly is connected between the third coil assembly and the fourth coil assembly.

4. The test device for simulating the tire burst of the automobile according to claim 3, wherein the contact finger assembly comprises a supporting seat, a screw, a contact finger and a spring; the supporting seat is fixed on the fourth coil group through the screw, and a mounting hole is formed in the supporting seat; the contact finger is telescopically arranged in the mounting hole in a penetrating manner, and one end, far away from the fourth coil group, of the contact finger movably abuts against the third coil group; the spring is arranged between the screw and the contact finger.

5. A test device for simulating a tire burst of an automobile according to claim 3, wherein the third coil group comprises a plurality of third coils arranged at intervals from inside to outside, and the fourth coil group comprises a plurality of fourth coils arranged at intervals from inside to outside; and the third coils correspond to the fourth coils one by one, and the contact finger assemblies are connected between the third coils and the fourth coils.

6. The testing device for simulating the tire burst of the automobile according to claim 5, wherein an insulating ring protrudes from the sliding sleeve along two adjacent fourth coils, and the two adjacent fourth coils are respectively arranged on the inner side and the outer side of the insulating ring.

7. A test device for simulating a tire burst in an automobile according to claim 3, wherein the center line of the sliding wire connector, the center line of the mounting seat, the center line of the cylinder cover and the center line of the cylinder body all coincide.

8. A test device for simulating the tire burst of an automobile according to claim 2, wherein the mounting seat further comprises a connector for connecting a tire valve, and the connector is communicated with the air pressure sensor.

9. A test method for simulating a tire burst of an automobile using the test apparatus for simulating a tire burst of an automobile according to any one of claims 1 to 8, comprising the steps of:

a plurality of through holes are formed in the automobile tire, so that the through holes correspond to the air inlet holes one by one and are communicated with the air inlet holes;

enabling the first coil to suck the pressure plate, and enabling the sealing diaphragm to seal the exhaust port;

controlling the electromagnetic coil to be not electrified so that a first vent hole of the reversing valve is communicated with a third vent hole, and a first air chamber is communicated with a second air chamber; the air in the automobile tire enters the first air chamber and the second air chamber, and the air pressures of the automobile tire, the first air chamber and the second air chamber are balanced and equal;

and controlling the electromagnetic coil to be electrified to enable the first vent hole and the second vent hole of the reversing valve to be communicated, the second air chamber to be communicated with the outside, and meanwhile, attracting the pressing plate by the second coil to open the sealing diaphragm from the exhaust port, so that the air pressure of the automobile tire is instantly reduced.

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