阅读说明：本技术 一种车轮用安全气囊装置 (Safety air bag device for wheel ) 是由 刘伟 侯钦成 憨钊华 于 2019-12-05 设计创作，主要内容包括：一种车轮用安全气囊装置,涉及真空轮胎的安全装置领域,在车轮的轮毂上安装有胎压监测装置,轮毂的轮辋上设有气体发生器,气体发生器上连接有充气膨胀后可填充在轮胎内的支撑气囊,胎压监测装置连接有电子控制器,电子控制器与气体发生器的启动装置相连；气体发生器的结构是：设有前端敞口的桶状的外壳体,外壳体内盛放有推进剂,外壳体内设有推进剂的点火器,支撑气囊安装在外壳体前端上；支撑气囊未充气膨胀时堆叠在易碎的气囊壳体内,气囊壳体与外壳体固定连接。本发明在轮胎破损时可以恢复轮胎外形,使车辆可正常行驶、刹车,避免突然爆胎引起的二次事故。(A safety airbag device for a wheel relates to the field of safety devices of vacuum tires, wherein a tire pressure monitoring device is arranged on a hub of the wheel, a gas generator is arranged on a rim of the hub, a supporting airbag which can be filled in the tire after being inflated and expanded is connected to the gas generator, the tire pressure monitoring device is connected with an electronic controller, and the electronic controller is connected with a starting device of the gas generator; the structure of the gas generator is as follows: the device is provided with a barrel-shaped outer shell with an opening at the front end, propellant is contained in the outer shell, an igniter of the propellant is arranged in the outer shell, and a supporting air bag is arranged at the front end of the outer shell; the support airbag is stacked in the fragile airbag shell when the support airbag is not inflated, and the airbag shell is fixedly connected with the outer shell. The invention can recover the tire shape when the tire is damaged, so that the vehicle can normally run and brake, and secondary accidents caused by sudden tire burst are avoided.)

1. An air bag device for a wheel is characterized in that a rim of the wheel hub is provided with a gas generator, the gas generator is connected with a supporting air bag which can be filled in the tire after being inflated and expanded, the air bag device is connected with an electronic controller, and the electronic controller is connected with a starting device of the gas generator; the structure of the gas generator is as follows: the device is provided with a barrel-shaped outer shell with an opening at the front end, propellant is contained in the outer shell, an igniter of the propellant is arranged in the outer shell, and a supporting air bag is arranged at the front end of the outer shell; the support airbag is stacked in the fragile airbag shell when the support airbag is not inflated, and the airbag shell is fixedly connected with the outer shell.

2. The airbag device for vehicle wheels according to claim 2, wherein the gas generator comprises a left gas generator and a right gas generator, and the support airbag is inflated to have a semicircular shape.

3. The airbag device for vehicle wheels according to any one of claims 1 to 2, wherein the tire pressure monitoring device comprises a pressure sensor circuit, a wireless transmitter circuit and a battery circuit, the electronic controller is connected to an output terminal of the pressure sensor, and a control execution terminal of the electronic controller is connected to the igniter.

Technical Field

The invention relates to the field of safety devices of vacuum tires, in particular to a safety airbag device for wheels, which is applied to the fields of new energy automobiles, common automobiles, electric vehicles, motorcycles and the like, and can restore the appearance of the tires when the vacuum tires are damaged, so that the vehicles can normally run and brake, and secondary accidents caused by sudden tire burst are avoided.

Background

It is known that with the development and progress of society, the number of various vehicles is increased rapidly, and the driving safety of the vehicles is more and more emphasized by host factories and consumers. At present, various automobile manufacturers actively explore and develop own automobile anti-explosion safety systems, the current scheme is to use special tires to reinforce the wall thickness of the tires, the tires can be used for several tens of kilometers in a short period of time at a certain speed, or a tire pressure sensor is used for preventing in advance, but certain defects exist, the special reinforced tires are difficult to install, the driving noise comfort level is very poor, the tire pressure sensor can only prevent the early warning of high or low tire pressure, and the sudden tire burst under the condition that the tires bump or press sharp objects is completely useless, so that the safety effect is not achieved.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provide an air bag device for a wheel, which can restore the appearance of the tire when the tire is damaged, ensure that a vehicle can normally run and brake and avoid secondary accidents caused by sudden tire burst.

The technical scheme adopted by the invention for solving the defects of the prior art is as follows:

the safety air bag device for the wheel is characterized in that a gas generator is arranged on a rim of the wheel hub, a supporting air bag which can be filled in the tire after inflation and expansion is connected to the gas generator, the tire pressure monitoring device is connected with an electronic controller, and the electronic controller is connected with a starting device of the gas generator.

The structure of the gas generator in the invention is as follows: the barrel-shaped outer shell with an open front end is arranged, propellant is contained in the outer shell, an igniter of the propellant is arranged in the outer shell, and the supporting air bag is arranged at the front end of the outer shell.

The gas generator comprises a left gas generator and a right gas generator, and the support airbag is in a semicircular shape after being inflated and expanded. The gas generated by the left gas generator enters the left supporting air bag connected with the left gas generator, the gas generated by the right gas generator enters the side supporting air bag connected with the right gas generator, and the two supporting air bags are inflated and expanded to be circularly filled in the tire, so that the filling speed is high, and the safety is improved.

The support airbag is stacked in a fragile airbag shell when not inflated, and the airbag shell is fixedly connected with the outer shell. The air bag shell can protect the supporting air bag from being damaged while the air bag and the gas generator are relatively and fixedly connected.

The tire pressure monitoring device comprises a pressure sensor circuit, a wireless transmitter circuit and a battery circuit, wherein an electronic controller is connected with the output end of the pressure sensor, and a control execution end of the electronic controller is connected with an igniter. The control execution end of the electronic controller is a relay, the electronic controller receives the pressure in the tire detected by the pressure sensor, and when the air pressure in the tire suddenly drops to exceed 150kpa within 50 milliseconds (the air pressure drops greatly), a signal is sent to control the relay to work and conduct an igniter circuit.

When the vacuum tire of the vehicle is in a sudden condition, such as puncture or impact of an external sharp object, the tire is damaged, the air pressure suddenly drops to exceed 150kpa within 50 milliseconds (the air pressure drops greatly), the tire pressure monitoring device transmits a tire pressure signal detected by the tire pressure monitoring device to the electronic controller, and the electronic controller immediately sends a signal to start the gas generator when judging that the tire is burst according to the tire pressure drop speed. The gas generator instantly generates a large amount of gas to support the supporting air bag in the tire, so that the appearance of the tire is not changed too much, and the supporting air bag is used as an inner tube of the tire. The invention can recover the tire shape when the tire is damaged, so that the vehicle can normally run and brake, and secondary accidents caused by sudden tire burst are avoided.

Drawings

FIG. 1 is a schematic illustration of the support airbag of the present invention in its uninflated configuration;

FIG. 2 is a schematic view of the configuration of the support airbag of the present invention engaged with a wheel hub after inflation;

FIG. 3 is a schematic view showing the structure of the inflator and the supporting airbag in connection with the present invention;

fig. 4 is a schematic diagram of the tire pressure monitoring device and the electronic controller of the present invention.

Detailed Description

As shown in fig. 1 and 2, the airbag device for a wheel is configured such that a tire pressure monitoring device is mounted on a hub 16 (a rim or an inflating valve) of the wheel, a gas generator is disposed on the rim of the hub 16 located in the tire, the gas generator is connected to a support airbag which is inflated and then can be filled in the tire, and the tire pressure monitoring device is connected to an electronic controller which is connected to a starting device of the gas generator. As can be seen from fig. 3, the structure of the gas generator is: the gas generator is provided with a barrel-shaped outer shell 8 with an open front end, the outer shell 8 is a pressure-resistant steel cylinder, propellant 11 is contained in the outer shell 8, the propellant 11 is a gas generating agent, sodium azide NaN3 and other substances which can generate decomposition reaction and release a large amount of gas in a short time (30 milliseconds) are selected. The igniter 10 of propellant is arranged in the rear part of the outer shell 8, the supporting air bag 13 is arranged at the front end of the outer shell, the opening of the front end of the outer shell is provided with a fragile baffle 12 (such as a cardboard or a plastic thin plate) for sealing the front end, and the propellant 12 which does not generate decomposition reaction can be blocked from entering the supporting air bag. The supporting air bag 13 is stacked in the fragile air bag shell 9 when not inflated, and the air bag shell 9 is fixedly connected with the front end of the outer shell 8; the air bag shell can protect the supporting air bag from being damaged while the air bag and the gas generator are relatively and fixedly connected. The air bag shell can be a paper bag or a thin and brittle plastic shell, and the air bag shell can be broken when being impacted and inflated in the supporting air bag, so that the inflation and the expansion of the supporting air bag are not influenced. The invention further improves that the gas generator comprises a left gas generator and a right gas generator, and the support airbag is in a semicircular shape after being inflated and expanded. The gas generated by the left gas generator enters the left supporting air bag connected with the left gas generator, the gas generated by the right gas generator enters the side supporting air bag connected with the right gas generator, and the two supporting air bags are inflated and expanded to be filled in the tire in a circular (annular) shape, so that the filling speed is high, and the safety is improved. As shown in fig. 4, the tire pressure monitoring device of the present invention includes a pressure sensor circuit 2, a wireless transmitter circuit 3 and a battery circuit 1, wherein the battery circuit is connected to the pressure sensor circuit and the wireless transmitter circuit 3 via a wire 6 to supply power to the pressure sensor circuit and the wireless transmitter circuit, and as can be seen from the figure, the wireless transmitter circuit is connected to an antenna 4 for enhancing the stability of wireless signals. The structure of the tire pressure monitoring device is the prior art, and the tire pressure monitoring device is characterized in that the electronic controller 5 is additionally arranged on the conventional tire pressure monitoring device, the electronic controller 5 is connected with the output end of a pressure sensor circuit of the tire pressure monitoring device, and the electronic controller 5 is used for detecting a tire pressure signal detected by the pressure sensor and judging whether tire burst occurs or not according to the change of the tire pressure. The control execution end of the electronic controller is connected with the igniter through a wiring terminal 7. The control execution end of the electronic controller is a relay additionally arranged at the control signal output end of the electronic controller, and the electronic controller can control the on and off of the relay. The electronic controller receives the pressure in the tire detected by the pressure sensor, and when the pressure in the tire suddenly drops to exceed 150kpa (the pressure drops greatly) within 50 milliseconds, a signal is sent to control the relay to close and conduct the igniter circuit. As shown in fig. 1, the left gas generator in combination with its supporting airbag forms a left airbag 151, the right gas generator in combination with its supporting airbag forms a right airbag 152, and the tire pressure monitoring device, the electronic controller, and its control execution terminal in combination form the monitoring controller 14. When the vacuum tire of the vehicle meets an emergent condition, such as puncture or impact of an external sharp object, which causes the tire to be damaged, and the air pressure drops to be more than 150kpa within 50 milliseconds (the air pressure drops greatly), the pressure sensor of the tire pressure monitoring device transmits a tire pressure signal detected by the pressure sensor to the electronic controller, when the electronic controller judges that the tire is burst according to the drop speed of the tire pressure, the electronic controller immediately sends a signal to the control execution end to work, controls the igniter to ignite and decompose the propellant into a large amount of gas, the gas generator instantly generates a large amount of gas to support the air bag in the tire so that the appearance of the tire is not changed excessively, at the moment, the support air bag serves as an inner tube of the tire and can support the tire to normally rotate within a short time, the tire burst detection and inflation work can be completed within 100 milliseconds, the advancing distance of the vehicle running at a high speed of 120km/h on a highway is, and because of the inertia of the automobile, the reduction of the air pressure in the tires and the process of inflating the supporting air bags, the driver feels very little and the normal driving of the driver is hardly influenced. The invention can recover the tire shape when the tire is damaged, so that the vehicle can normally run and brake, and secondary accidents caused by sudden tire burst are avoided.