WO2009033329A1

WO2009033329A1 - An antiexplosion device for tyre

Info

Publication number: WO2009033329A1
Application number: PCT/CN2007/002897
Authority: WO
Inventors: Hezhang Chen; Shufang Cui
Original assignee: Hezhang Chen; Shufang Cui
Priority date: 2007-09-12
Filing date: 2007-10-09
Publication date: 2009-03-19
Also published as: CN201082666Y

Abstract

An antiexplosion device for tyre comprises a case (21 ) and a controlling valve. The case (21 ) is fixed on the wheel hub ( 10 ). It also comprises a power source equipment, which is composed of a compressing unit, a circuit (4), a pressure reservoir (5) and a controlling valve. The said device can inflate and deflate the tyre, it can regulate the gas temperature in the tyre as well.

Description

• Tire explosion-proof device

Technical field

The utility model relates to a tire explosion-proof device, which is mainly used for explosion-proof of a pneumatic tire. Background technique

At present, the tire puncture of car tires is difficult to predict, and the traffic accidents caused by punctures are mostly serious traffic accidents. Moreover, puncture accidents account for a large proportion of all traffic accidents, especially highways. , accounting for 70% to 80%, it can be seen that its harmfulness! Therefore, it has attracted the attention of the automotive industry, and it has been listed as one of the key problems that the top ten autos in the next 10 years are looking forward to. As far as the current situation is concerned, existing products can be divided into two categories: one is to actively prevent punctures; the other is to prevent traffic accidents after the tires burst.

According to the National Transportation Safety Administration, in the case of a puncture accident, the tire pressure is too low, accounting for 57%, and the tire pressure is too high, accounting for 20%. Other factors, such as overspeed, overload, and tire aging, account for 23%. It can be seen that the proportion of tire pressure is correct or not, why is air pressure so important? Because the car is running, the tire will be deformed once per revolution. Due to the deformation, the tire will heat up and the temperature of the gas inside the tire will rise. When the air pressure is normal, the heat generated by the deformation is less, the excess heat is dissipated during the running of the tire, and the residual heat does not cause the tire to burst. However, when the air pressure is lower than the normal value, the deformation is increased and the generated heat is insufficient to drive. If it is dispersed, it will cause the temperature in the tire to increase. When the temperature increases, the pressure will also rise. In addition, if the tire is overheated, its strength will also become worse and smaller. When it exceeds its pressure, it will definitely explode. The high pressure principle is also as described above, except that the position where the deformation is large becomes the crown, not the sidewall when the pressure is low. The speeding and overloading are also the same, but only the process of increasing the temperature and increasing the tire pressure is accelerated. Therefore, it is seen from the above that whether the tire pressure is maintained normally or not is a key point.

Secondly, due to continuous, long-term braking, the wheel hub is overheated, which will also cause the temperature inside the tire to rise. Even if the pressure is normal at the beginning, a long-term braking may cause a puncture accident. Now there are several options:

1. Tire Pressure Alarm System (TPMS), also known as tire pressure monitoring system.

The system monitors the pressure and temperature of each wheel from time to time through the sensors installed in each wheel, and wirelessly transmits the data to the receiving system of the cab. When the pressure is too high or low, the temperature is too high. Will alarm, remind the driver to pay attention;

2. The deflation device or alarm device when the air pressure is too high:

The system is equipped with a pressure limiting check valve at the valve. When the internal pressure is higher than the pressure set by the check valve, the gas in the tire is discharged outward to ensure the tire pressure is normal, and the alarm device is in the check valve. Install a whistle. When the check valve is opened, the gas in the tire blows the whistle to alert the driver. From this, it can be seen that although the deflation lowers the air pressure when the air pressure is high, there are the following drawbacks: When the car makes a sharp turn, brakes or encounters an uneven road, the air pressure inside the tire temporarily increases, which may be The outside is deflated, so that the normal normal air pressure is lowered, and the gas that should not be released is released. It may cause the tire pressure to drive abnormally.

3. Chinese patent number: 200620154783. The X name is "an automobile tire explosion-proof device", which adds a pressure chamber between the valve and the check valve, and is provided in the pipeline between the valve and the pressure chamber. A miniature through hole to control the air flow, that is, when the vehicle is in a sharp turn, brake, or uneven moment, the pressure inside the tire increases, and the gas in the tire is discharged to the pressure chamber, but it takes a few seconds to make the pressure chamber The pressure reaches the pressure of opening the check valve, and the above situation is generally instantaneous, and the check valve will not open and deflate, thereby avoiding the situation that the gas is not released when the gas is released. When the tire pressure is continuously increased , will deflate the risk.

4. Central Charge and Deflating System (CTIS):

The system consists of a tire pressure monitoring system, namely TPMS; 2 rotary seal system 3, multi-function tire wide system 4 control circuit system. When the driver stops or drives, the tire pressure is known through the TPMS system. When the pressure inside the tire is to be reduced, such as when driving from the road into the desert, the control circuit gives the command, and the multi-function wide system will let the tire deflate. Reach the required pressure. When you want to increase the tire pressure, such as from the desert to the asphalt road Above, the inflation system is commanded to refill the tire until it is satisfied.

The above several systems or devices basically represent the latest level of technology for preventing punctures. As far as TPMS is concerned, it only gives warning function, how to solve the abnormal tire pressure, high temperature, etc., no below, and, when exhausted, if it is not refilled in time, there will be more serious consequences.

The CTIS system does understand the pressure and temperature, and it is important to adjust the pressure and temperature. However, due to its complicated structure, the machining accuracy is extremely high and the cost is high, which limits its popularity. Although it has been around for decades, The CTIS system is only used on high-end off-road military vehicles in various countries. In the civilian sector, ultra-luxury vehicles have very few installations. Utility model content

The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art, and to provide a tire explosion-proof device which is simple in structure and low in cost, can inflate and deflate the tire, and can adjust the temperature of the gas in the tire.

The technical solution of the utility model is: a tire explosion-proof device, comprising a casing and a control valve, wherein the casing is fixed on the hub, characterized in that it further comprises a power source device, and is composed of a compression unit, a pipeline, a pressure bottle and a control valve. .

The power source device is a vibration force, and the technical solution is: the casing is connected with the hub, the compression unit is fixed on the casing, and a check valve is arranged on both sides thereof, and the pipeline connects the compression unit and the compression bottle, and the compression bottle passes through the pipe. The road is connected to a pressure valve, and the pressure valve is connected by a pipe and a tire door.

The power source device is an inertial force, and the technical solution thereof is: the inertia disk is mounted on the shaft through a bearing, the shaft and the casing are fixedly connected, an overrunning clutch is arranged between the shaft and the inertia disk, the casing is fixed on the hub, the cam and the cam The inertia disks are fixed together and the compression unit is fixed to the outer casing.

The compression unit has at least one piston and is provided with a corresponding number of one-way valves. The overrunning clutch may be in a plurality of manners such as a ratchet type, a steel ball type, and a friction wheel type.

The utility model adopts the above structure, has the advantages of simple structure and low cost, and can inflate and deflate the tire, and can adjust the temperature of the gas in the tire. DRAWINGS

Figure 1 is a schematic view of a vibrating structure;

Figure 2 is an A-direction view;

3 is a schematic structural view of a compression unit 6;

Figure 4 is a schematic view of the inertial structure;

Figure 5 is a cross-sectional view of Figure 4B-B.

Specific embodiment

The utility model will be further described below with reference to the accompanying drawings:

As can be seen from Figures 1, 2 and 3, the outer casing 21 is coupled to the wire rope 8 and the hub 10. The compression unit 6 is fixed to the outer casing 21, and the two sides are provided with check valves 6-5, 6-6, pipes 7, 7-1 The compression unit 6 and the compression bottle 5 are respectively connected, the compression bottle 5 is connected to the pressure valve 3 through the pipeline 1, and the pressure valve 3 is communicated with the tire valve through the pipeline 4 (ie, communicating with the gas in the tire), the pressure valve 2 and There is a pipeline connection between the three.

Working principle: The pressure valves 2 and 3 shown in Fig. 1 are in the normal state. At this time, it is assumed that the pressure in the tire 11 is P1, which is smaller than the pressure P2 (tire standard pressure) set by the pressure valve 2, and the pressure valve 2 is closed. When the car is running, due to the uneven road surface (5 waking), and the braking of the vehicle, the piston 6-2 will be impacted up or down, and the generated compressed gas enters the pipeline 7, 7-1 through the check valve 6-5. And entering the compression bottle 5, the pressure P3 is generated to the pressure valve 3 through the pipe 1, and when the P3 is increased and exceeds the spring force of the pressure valve 3, the core direction of the pressure valve 3 Move down, let the pipes 1 and 4 communicate, and make the connection between the pipe 4 and the pressure valve 2 become disconnected, the compressed gas enters the valve through the pipe 4, and enters the tire 11, due to the pressure P3 > P1 entering the tire 11 Therefore, it rapidly expands and absorbs a part of the heat in the tire 11. This process completes the process of inflating the tire 11 and absorbing heat.

Due to the limited volume of compressed gas in the compression bottle 5, the pressure rise in the tire 11 is also limited, assuming that ΔΡ is increased, and at the same time, since the pressure Ρ3 in the compression bottle 5 is lowered, the core of the pressure ceramic 3 is reset under the elastic force, and the tube is pressed. The roads 1 and 4 are disconnected, and the valve 2 and the pipeline 4 are connected. At this time, the spring bearing pressure of the valve 2 becomes Ρ1 + ΔΡ. When the above process is repeated several times, the pressure increase value of the n times is also changed to η·ΔΡ. When η·ΔΡ+Ρ1>Ρ2 (ie, the set standard pressure), the core of the pressure valve 2 moves downward, the tire gas is exhausted through the pipeline 4, the pressure valves 2, 3, and the pressure inside the tire is lowered until η When 'ΔΡ+Ρ1«Ρ2, the pressure valve 2 core is returned and the exhaust gas is terminated. This process shows that the original tire 11 has a low pressure and is inflated to become the standard pressure. When the tire 11 has a high pressure, the tire 11 has a high pressure. It will be exhausted to the standard pressure to ensure that the pressure in the tire 11 is not too high or too low. At the same time, since the compression bottle 5 injects a relatively high pressure gas into the tire, the heat in the tire is absorbed, and the heat is reached. The purpose of cooling.

This process is repeated during the running of the vehicle, thus ensuring that the pressure of the tire 11 is normal and the heat is lowered, thereby avoiding the puncture, and because the pressure is normal, the fuel consumption is also reduced by 5% to 10%.

4, 5, the inertia disk 20 is mounted on the shaft 16 via the bearings 14, 15, the shaft 16 and the outer casing 21 are fixedly coupled, and between the shaft 16 and the inertia disk 20, an overrunning clutch 17 is mounted, and the outer casing 21 is fixed by the wire rope 8. On the hub 10, the cam 18 and the inertia disk 20 are fixed together, and the compression unit 19 is fixed to the outer casing 21.

Working principle: When the car starts, the wheel starts to accelerate, and the outer casing 21 is rotated by the joint 8, and the outer casing 21 is rotated by the shaft 16. At this time, the overrunning clutch 17 is combined, and the inertia disk 20 and the cam 18 are rotated. At this time, the rotational speeds of the piston 13 and the cam 18 are equal, so that the piston 13 does not operate. When the starting speed is accelerated to a certain speed, the vehicle is driven at a constant speed, or when the vehicle is decelerating at a constant speed, the rotation speed of the wheel 11 is lowered, and the inertia disk 20 is still rotated by the inertial force, and the overrunning clutch 17 is released, and the cam 18 starts to push the piston 13 Movement, the piston 13 overcomes the spring force of the spring 12, compresses the gas of the head, and the pressure is greater than the force of the check valve 6-6. Then, the compressed gas starts to be supplied to the compression line until the top dead center of the cam 18. When the cam 18 rotates to the top dead center, the piston 13 moves downward, the check valve 6-6 closes, and the 6-5 opens the intake air to After the bottom dead center, 6-5 is also closed. Thus, the piston 13 completes a process of compression and suction.

As long as the inertial force of the inertia disk 20 is sufficient, that is, the elastic force of the spring 12 and the work required to compress the gas of the head can be overcome, the compressed gas can be continuously generated and supplied to the pressure bottle 5.

When the rotational speed of the inertia disk 20 is lower than the rotational speed of the wheel, the overrunning clutch 17 is closed again to obtain energy, and reaches the same rotational speed as the wheel, and when the vehicle decelerates, the piston 13 starts to work.

The above two cases work in a non-absolute manner, but are mutually inclusive, that is, vibrating vibrations in addition to vibrations, and energy is also available when the vehicle is decelerating. For the inertia type, in addition to the energy work during deceleration, the vibration of the wheel can also provide working energy.

Claims

Rights request

1. A tire explosion-proof device comprising a housing and a control valve, the housing being fixed to the hub, characterized in that it further comprises a power source device and is composed of a compression unit, a pipeline, a pressure bottle and a control valve.

2. The tire explosion-proof device according to claim 1, wherein the power source device uses a vibration force source, wherein: the casing is connected to the hub, the compression unit is fixed on the casing, and the one-way valve is arranged on both sides thereof. The pipeline connects the compression unit to the compression bottle, and the compression bottle is connected to the pressure valve through a pipeline, and the pressure valve is connected by the pipeline and the tire valve.

3. The tire explosion-proof device according to claim 1, wherein the power source device is an inertial force source, wherein: the inertia disk is mounted on the shaft through a bearing, the shaft and the casing are fixedly connected, and the shaft and the inertia disk are An overrunning clutch is interposed, the housing is fixed to the hub, the cam and the inertia disk are fixed together, and the compression unit is fixed on the outer casing.

4. A tire explosion-proof device according to claim 1, 2 or 3, characterized in that said compression unit has at least one piston and is provided with a corresponding number of one-way valves.

The tire explosion-proof device according to claim 3, characterized in that the overrunning clutch is of a ratchet type, a steel ball type, a friction wheel type or the like.