Testing device

Abstract

The invention provides a testing device, which is used for a deaeration test of a vehicle tire and comprises a base, a one-way valve, an air pump and an electric control valve. The base is connected with a hub of a vehicle tire, and an airtight cavity used for being connected with an air cavity of the vehicle tire is formed in the base. A first channel end of the one-way valve is connected with the airtight cavity; an air outlet of the air pump is in butt joint with the second channel end of the one-way valve, the one-way valve is configured to stop air inflow from the first channel end to the second channel end and conduct air inflow from the second channel end to the first channel end, and the air pump is used for pumping air into the airtight cavity through the one-way valve so as to inflate vehicle tires; and the electric control valve is connected with the airtight cavity and is used for selectively communicating the airtight cavity with the atmosphere so as to deflate the vehicle tire. In this way, the testing efficiency of the testing device can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle tire testing, and in particular to a testing device. Background Art

[0002] When a car is driving at high speed and has a tire blowout, it will show obvious yaw and sway phenomena. In severe cases, it will have tailspin, spin, or even rollover, which seriously affects the life and property of the driver and passengers and road traffic safety. Currently, the market has tire pressure monitoring (TPMS), tire blowout emergency safety devices, tire blowout stability electronic control and other technologies for automobile tire blowout safety prevention and control. In order to ensure the protection performance, the relevant tests of the above technologies (that is, the deflation test of vehicle tires) and their equipment (that is, the test device used for deflation test) are particularly important. However, the test efficiency of the existing test device for deflation test is low and cannot meet the production needs of automobiles. Summary of the invention

[0003] The present application provides a testing device, which is used for deflation testing of vehicle tires. The testing device includes: a base, a one-way valve, an air pump, and an electric control valve. The base is connected to the wheel hub of the vehicle tire, and the base forms an airtight cavity for connecting to the air cavity of the vehicle tire; the first channel end of the one-way valve is connected to the airtight cavity; the air outlet of the air pump is connected to the second channel end of the one-way valve, and the one-way valve is configured to cut off the air intake from the first channel end to the second channel end, and conduct the air intake from the second channel end to the first channel end. The air pump is used to pump gas into the airtight cavity through the one-way valve to inflate the vehicle tire; the electric control valve is connected to the airtight cavity, and is used to selectively connect the airtight cavity to the atmosphere to achieve deflation of the vehicle tire.

[0004] In some embodiments, the testing device also includes a control component, which is respectively connected to the air pump and the electronically controlled valve. The control component is used to control the air pump to pump gas into the airtight cavity through the airtight cavity based on the inflation signal, and to control the electronically controlled valve to deflate the vehicle tire based on the deflation signal.

[0005] In some embodiments, the one-way valve, the air pump, the electric control valve and the control assembly are arranged on the middle area of ​​the side of the base facing away from the hub.

[0006] In some embodiments, the electrically controlled valve is a flow solenoid valve, and the control component is also used to control the opening of the flow solenoid valve to adjust the discharge rate of the gas in the airtight cavity.

[0007] In some embodiments, the base includes a cylindrical body adapted to the wheel hub. An airtight cavity is formed inside the cylindrical body. The cylindrical body is coaxially arranged with the wheel hub. The base further includes a first pair of interfaces, a second pair of interfaces, and a third pair of interfaces that are respectively communicated with the airtight cavity. The first pair of interfaces are arranged on the circumferential side of the cylindrical body along the radial direction of the cylindrical body, and the first pair of interfaces are used to connect with the air cavity. The second pair of interfaces and the third pair of interfaces are arranged at the ends of the cylindrical body along the axial direction of the cylindrical body. The second pair of interfaces are connected to the first channel end, and the third pair of interfaces are connected to the electromagnetic control valve.

[0008] In some embodiments, the second pair of interfaces and the third pair of interfaces are arranged adjacent to the central axis of the cylindrical body.

[0009] In some embodiments, the base includes a plurality of first pair of interfaces, and the plurality of first pair of interfaces are evenly spaced on the circumferential side of the cylindrical body.

[0010] In some embodiments, the control component obtains the inflation signal and the deflation signal in a wireless communication manner.

[0011] In some embodiments, the control component includes: a processing circuit and a wireless communication circuit. The processing circuit is communicatively connected to an external control device through the wireless communication circuit to obtain the inflation signal and the deflation signal; a first driving circuit, connected to the processing circuit and the air pump, for driving the air pump to work based on the control of the processing circuit; a second driving circuit, connected to the processing circuit and the electromagnetic control valve, for driving the electromagnetic control valve to work based on the control of the processing circuit.

[0012] In some embodiments, the testing device further includes a tire pressure detection device arranged on the base. The sensing end of the tire pressure detection device is arranged in the airtight cavity for obtaining the tire pressure data of the vehicle tire.

[0013] The beneficial effects of the embodiments of the present application are as follows: The present application provides a testing device, which includes an air pump, a one-way valve, and an electromagnetic valve. Among them, the air pump and the one-way valve serve as the intake branch of the airtight chamber, and the electromagnetic valve serves as the exhaust branch of the airtight chamber. The intake branch and the exhaust branch of the airtight chamber are independent of each other. During the deflation test, the airtight chamber can exhaust air through the electromagnetic valve to simulate working conditions such as a flat tire condition or a leakage condition of a vehicle tire. And due to the function of the one-way valve, the influence of the air pump on the exhaust of the airtight chamber is relatively small. Based on this, there is no need to disassemble the air pump during the deflation test, and the air pump can remain connected to the airtight chamber. After the deflation test is completed, the airtight chamber can be quickly inflated through the air pump to quickly inflate the vehicle tire, so that the testing device can quickly perform the next round of deflation test, thereby effectively improving the testing efficiency of the testing device. In other words, after the testing device is installed on the wheel hub through the base, the operator does not need to perform any further processing on the testing device. The operator can remotely control the air pump to inflate the vehicle tire and control the electromagnetic valve to deflate the vehicle tire, thereby effectively improving the testing efficiency of the testing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the testing device of the present application;

[0015] Figure 2 is Figure 1 a schematic diagram of the air duct connection structure between the shown testing device and the vehicle tire;

[0016] Figure 3 is Figure 1 a schematic diagram of the circuit structure of the shown control component, external control device, air pump, and electromagnetic valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0018] The terms "first" and "second" in this application are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0019] As Figure 1 and Figure 2 shown, this application provides a test device 10 for performing a flat tire test on a vehicle tire 20. The flat tire test of the vehicle tire 20 is also known as a blowout test.

[0020] The test device 10 includes: a base 100, a one-way valve 200, an air pump 300, and an electric control valve 400. The base 100 is connected to the hub of the vehicle tire 20, and the base 100 is formed with an airtight cavity 101 for connecting to the air cavity 21 of the vehicle tire 20; the first passage end of the one-way valve 200 is connected to the airtight cavity 101; the air outlet of the air pump 300 is docked with the second passage end of the one-way valve 200. The one-way valve 200 is configured to cut off air intake along the first passage end to the second passage end, and conduct air intake along the second passage end to the first passage end. The air pump 300 is used to pump gas into the airtight cavity 101 through the one-way valve 200 to inflate the vehicle tire 20; the electric control valve 400 is connected to the airtight cavity 101 and is used to selectively communicate the airtight cavity 101 with the atmosphere to deflate the vehicle tire 20.

[0021] Specifically, in the embodiment of the present application, the base 100 is provided with an airtight cavity 101. During the deflation test, the base 100 is relatively fixed to the wheel hub. Components such as the one-way valve 200, the air pump 300, and the electric control valve 400 can be arranged on the base 100 and fixed to the wheel hub together with the base 100. The airtight cavity 101 of the base 100 is connected to the air cavity 21 of the vehicle tire 20. In this way, the air pump 300 can inflate the vehicle tire 20 by inflating the airtight cavity 101, and the electric control valve 400 can deflate the vehicle tire 20 by connecting the airtight cavity 101 to the atmosphere. By arranging components such as the one-way valve 200, the air pump 300, and the electric control valve 400 on the base 100, docking ports adapted to the one-way valve 200 and the electric control valve 400 can be opened on the base 100, so that the one-way valve 200 and the electric control valve 400 are directly connected to the airtight cavity 101, thereby reducing the use of pipeline components and facilitating the dynamic deflation test of the vehicle tire 20 by the test device 10. Among them, the dynamic deflation test refers to the deflation test of the vehicle tire 20 when the vehicle tire 20 is rotating.

[0022] The one-way valve 200 is a one-way conduction valve body, that is, as described above, the one-way valve 200 is configured to cut off the intake along the first channel end to the second channel end, and conduct the intake along the second channel end to the first channel end. The air pump 300 is connected to the airtight cavity 101 of the base 100 for intake through the one-way valve 200. When the air pump 300 works, the air pump 300 can introduce external air into the airtight cavity 101 through the one-way valve 200 to inflate the vehicle tire 20. When the air pump 300 stops working, the gas in the airtight cavity 101 cannot be exported to the external space through the one-way valve 200. The electric control valve 400 is connected to the airtight cavity 101, and the electric control valve 400 can be selectively conducted based on the control of the external control device 30 to connect the airtight cavity 101 to the external space, thereby deflating the vehicle tire 20 to simulate working conditions such as a flat tire condition and a leakage condition of the vehicle tire 20.

[0023] The air pump 300 and the one-way valve 200 serve as the intake branch of the airtight cavity 101, and the electric control valve 400 serves as the exhaust branch of the airtight cavity 101. Among them, the airway connection mode between the air cavity 21, the airtight cavity 101, the air pump 300, the one-way valve 200, and the electric control valve 400 can be referred to Figure 2As shown, it will not be elaborated in detail here. The intake branch and the exhaust branch of the airtight chamber 101 are independent of each other. During the deflation test, the airtight chamber 101 can exhaust through the electric control valve 400 to simulate the flat tire condition, air leakage condition and other conditions of the vehicle tire 20. And the influence of the air pump 300 on the exhaust of the airtight chamber 101 is small under the action of the one-way valve 200. Based on this, the air pump 300 does not need to be disassembled during the deflation test, and the air pump 300 can be kept connected to the airtight chamber 101. After the deflation test is over, the airtight chamber 101 can be quickly inflated through the air pump 300 to quickly inflate the vehicle tire 20, so that the test device 10 can quickly perform the next round of deflation test, thus effectively improving the test efficiency of the test device 10. In other words, after the test device 10 is installed on the wheel hub through the base 100, the operator does not need to perform any treatment on the test device 10. The operator can remotely control the air pump 300 to inflate the vehicle tire 20 and control the electric control valve 400 to deflate the vehicle tire 20, thus effectively improving the test efficiency of the test device 10.

[0024] As Figure 1 and Figure 3 shown, in some embodiments, the test device 10 further includes a control component 600. The control component 600 is respectively connected to the air pump 300 and the electric control valve 400 for control. The control component 600 is used to control the air pump 300 to pump gas into the airtight chamber 101 through the airtight chamber 101101 based on the inflation signal, and is used to control the electric control valve 400 to conduct to deflate the vehicle tire 20 based on the deflation signal.

[0025] Specifically, in the embodiment of the present application, the control component 600, the one-way valve 200, the electric control valve 400 and the air pump 300 are integrally arranged on the base 100. During the test, the test device 10 can be fixed on the wheel hub through the base 100. In this way, after the operator evacuates to a safe area, the inflation and deflation control of the vehicle tire 20 can be realized by sending an inflation signal and a deflation signal to the control component 600. Based on this, the safety of the deflation test can be effectively improved.

[0026] As Figure 1As shown, in some embodiments, the one-way valve 200, the air pump 300, the electromagnetic valve 400, and the control assembly 600 are disposed in the middle area on the side of the base 100 facing away from the wheel hub. Specifically, in order to truly reflect the actual working conditions of the vehicle tire 20 during the test, a dynamic deflation test is performed on the vehicle tire 20. Therefore, the entire test device 10 needs to rotate together with the vehicle tire 20. The base 100 can be fixed to the central area of the wheel hub, so that the moment of inertia of the middle area of the base 100 is small, thereby effectively reducing the risk that the one-way valve 200, the air pump 300, the electromagnetic valve 400, and the control assembly 600 are thrown off or shaken off during the rotation of the vehicle tire 20, and thus effectively improving the working stability of the test device 10.

[0027] As Figure 1 As shown, in some embodiments, the base 100 includes a cylindrical main body 110 adapted to the wheel hub. An airtight cavity 101 is formed inside the cylindrical main body 110. The cylindrical main body 110 is coaxially arranged with the wheel hub. The base 100 further includes a first interface 120, a second interface 121, and a third interface 122 that are respectively communicated with the airtight cavity 101. The first interface 120 is arranged on the circumferential side of the cylindrical main body 110 along the radial direction of the cylindrical main body 110. The first interface 120 is used to connect with the air cavity 21. The second interface 121 and the third interface 122 are arranged at the end of the cylindrical main body 110 along the axial direction x1 of the cylindrical main body 110. The second interface 121 is connected to the first channel end, and the third interface 122 is connected to the electromagnetic valve 400.

[0028] Specifically, the cylindrical main body 110 serves as the main body of the base 100 and is coaxially arranged with the wheel hub, thus reducing the influence of the base 100 on the rotation of the vehicle tire 20. Among them, the first pair of interfaces 120, the second pair of interfaces 121 and the third pair of interfaces 122 can be integrally formed with the cylindrical main body 110 by a molding method. The first pair of interfaces 120 is arranged on the circumferential side of the cylindrical main body 110, so as to improve the connection convenience between the first pair of interfaces 120 and the air chamber 21. The second pair of interfaces 121 and the third pair of interfaces 122 are interfaces adapted to the connection ports of the one-way valve 200 and the electric control valve 400 respectively. While the one-way valve 200 can be docked through the second pair of interfaces 121 to realize the connection with the airtight chamber 101, it can also remain relatively fixed with the cylindrical main body 110. While the electric control valve 400 can be docked through the third pair of interfaces 122 to realize the connection with the airtight chamber 101, it can also remain relatively fixed with the cylindrical main body 110. In other words, the second pair of interfaces 121 serves as both the channel interface for the connection between the one-way valve 200 and the airtight chamber 101 and the connection structure for the connection between the one-way valve 200 and the cylindrical main body 110. The third pair of interfaces 122 serves as both the channel interface for the connection between the electric control valve 400 and the airtight chamber 101 and the connection structure for the connection between the electric control valve 400 and the cylindrical main body 110. Among them, the air pump 300 and the one-way valve 200 are of an integral structure, and the air pump 300 and the one-way valve 200 are arranged on the cylindrical main body 110 through the second pair of interfaces 121.

[0029] As Figure 1 shown, in some embodiments, the second pair of interfaces 121 and the third pair of interfaces 122 are arranged adjacent to the central axis z1 of the cylindrical main body 110. Specifically, as described above, the second pair of interfaces 121 serves as both the channel interface for the connection between the one-way valve 200 and the airtight chamber 101 and the connection structure for the connection between the one-way valve 200 and the cylindrical main body 110. The third pair of interfaces 122 serves as both the channel interface for the connection between the electric control valve 400 and the airtight chamber 101 and the connection structure for the connection between the electric control valve 400 and the cylindrical main body 110. Therefore, the second pair of interfaces 121 and the third pair of interfaces 122 are arranged adjacent to the central axis z1 of the cylindrical main body 110. Based on this, the air pump 300, the one-way valve 200 and the electric control valve 400 are arranged adjacent to the central axis z1 of the cylindrical main body 110, so that the air pump 300, the one-way valve 200 and the electric control valve 400 are located in the middle area of the cylindrical main body 110, thus effectively reducing the risk that the one-way valve 200, the air pump 300 and the electric control valve 400 are thrown off or shaken off during the rotation of the vehicle tire 20, and further effectively improving the working stability of the test device 10.

[0030] Optionally, as Figure 1As shown, the air pump 300, the control component 600, and the one-way valve 200 can be integrally provided through an assembly method and further arranged on the base 100. The control component 600 can be controllably connected to the electromagnetic valve 400 arranged on the base 100 through a cable.

[0031] As Figure 1 shown, in some embodiments, the base 100 includes a plurality of first mating interfaces 120, and the plurality of first mating interfaces 120 are evenly spaced on the circumferential side of the cylindrical main body 110.

[0032] Optionally, as Figure 3 shown, the control component 600 obtains inflation signals and deflation signals in a wireless communication manner. Specifically, the control component 600 includes a processing circuit 610, a wireless communication circuit 640, a first driving circuit 620, and a second driving circuit 630. The first driving circuit 620 is connected to the processing circuit 610 and the air pump 300, and is used to drive the air pump 300 to work based on the control of the processing circuit 610. The second driving circuit 630 is connected to the processing circuit 610 and the electromagnetic valve 400, and is used to drive the electromagnetic valve 400 to work based on the control of the processing circuit 610. Among them, the processing circuit 610 is communicatively connected to the external control device 30 through the wireless communication circuit 640 to obtain inflation signals and deflation signals. Based on this, after the operator fixes the test device 10 to the wheel hub through the base 100 and evacuates to a safe area, a communication connection can be established between the external control device 30 and the test device 10, and then inflation signals and deflation signals can be sent to the control component 600 of the test device 10, so as to control the inflation and deflation of the vehicle tire 20 by the test device 10, thus effectively improving the test convenience and safety of the test device 10.

[0033] Optionally, as Figure 3 shown, the control component 600 further includes a circuit board (not labeled in the figure), a power supply circuit 660, and a power supply 650. Among them, the power supply circuit 660, the power supply 650, the processing circuit 610, the wireless communication circuit 640, the first driving circuit 620, and the second driving circuit 630 are integrated on the circuit board and installed inside the housing of the air pump 300 through the circuit board. The power supply 650 is connected to the first driving circuit 620 and the second driving circuit 630, and the first driving circuit 620 and the second driving circuit 630 are used to output operating voltages to the air pump 300 and the electromagnetic valve 400 respectively under the control of the processing circuit 610. The power supply circuit 660 is respectively connected to the power supply 650, the processing circuit 610, and the wireless communication circuit 640, and the power supply circuit 660 is used to convert the initial voltage output by the power supply 650 into the operating voltages corresponding to the processing circuit 610 and the wireless communication circuit 640. Among them, the power supply 650 can be a button battery.

[0034] Optionally, the external control device 30 may be a host computer, a computer, a remote control, or other control devices capable of sending wireless communication signals. The wireless communication circuit 640 may be any one of a Bluetooth communication circuit, a wireless local area network circuit (Wifi, Wireless Fidelity), and a radio frequency communication circuit (RFS, Radio frequency signal).

[0035] Optionally, as Figure 1 shown, the test device 10 further includes a tire pressure detection device 500. The tire pressure monitoring device is disposed on the base 100, and the sensing end 510 of the tire pressure detection device 500 is disposed in the airtight cavity 101 for obtaining the tire pressure data of the vehicle tire 20. Specifically, in the embodiment of the present application, the tire pressure detection device 500 is connected to the processing circuit 610. The sensing end 510 of the tire pressure detection device 500 generates a tire pressure data electrical signal based on the air pressure change in the airtight cavity 101. The processing circuit 610 is configured to perform analog-to-digital signal conversion on the tire pressure data electrical signal and generate tire pressure information. The processing circuit 610 sends the tire pressure information to the external control device 30 or the host computer through the wireless communication circuit 640 for the host computer to perform tire pressure data analysis.

[0036] In some embodiments, the tire pressure detection device 500 may also be directly installed on the vehicle tire 20 and connected to the air cavity 21 to directly obtain the tire pressure data of the vehicle tire 20. And the tire pressure detection device 500 is equipped with a communication circuit, and the detection device sends the tire pressure data to the host computer through the communication circuit for the host computer to perform tire pressure data analysis.

[0037] In some embodiments, the electric control valve 400 is a flow solenoid valve, and the control component 600 is further configured to control the opening degree of the flow solenoid valve to adjust the discharge rate of the gas in the airtight cavity 101. Specifically, in the embodiment of the present application, the flow solenoid valve is a normally closed solenoid valve. The flow solenoid valve is connected to the second drive circuit 630. When the second drive circuit 630 is not powered, the flow solenoid valve is always in a closed state, so that the airtight cavity 101 is in an airtight state and cannot exhaust gas. During the inflation process, the processing circuit 610 drives the air pump 300 to work by controlling the first drive circuit 620, so that the air pump 300 can inflate the airtight cavity 101 through the one-way valve 200. During the deflation process, the processing circuit 610 can control the output of the second drive circuit 630 based on the instruction of the external control device 30 (for example, a deflation signal for deflating at a preset discharge rate) to preset the drive current, so that the flow solenoid valve is turned on at a preset opening degree under the action of the preset drive current, so that the airtight cavity 101 exhausts gas at a preset discharge rate. Based on this, the test device 10 can simulate different degrees of tire blowout or air leakage events under the control of the external control device 30, thereby effectively improving the functional diversity of the test device 10.

[0038] In some embodiments, the external control device 30 can be programmed and controlled by a host computer, so that the external control device 30 can control the test device 10 to test the vehicle tire 20 according to a preset experimental scheme.

[0039] In summary, the present application provides a test device 10, wherein the test device 10 includes: a base 100, a check valve 200, an air pump 300 and an electromagnetic valve 400. The base 100 is connected to the hub of the vehicle tire 20, and the base 100 is formed with an airtight cavity 101 for connecting with the air cavity 21 of the vehicle tire 20; the first channel end of the check valve 200 is connected to the airtight cavity 101; the air outlet of the air pump 300 is docked with the second channel end of the check valve 200. The check valve 200 is configured to cut off the intake along the first channel end to the second channel end, and conduct the intake along the second channel end to the first channel end. The air pump 300 is used to pump gas into the airtight cavity 101 through the check valve 200 to inflate the vehicle tire 20; the electromagnetic valve 400 is connected to the airtight cavity 101 and is used to selectively communicate the airtight cavity 101 with the atmosphere to realize deflation of the vehicle tire 20. The air pump 300 and the check valve 200 serve as the intake branch of the airtight cavity 101, and the electromagnetic valve 400 serves as the exhaust branch of the airtight cavity 101. The intake branch and the exhaust branch of the airtight cavity 101 are independent of each other. During the deflation test, the airtight cavity 101 can be exhausted through the electromagnetic valve 400 to simulate working conditions such as a flat tire condition and a leakage condition of the vehicle tire 20. And the influence of the air pump 300 on the exhaust of the airtight cavity 101 is small under the action of the check valve 200. Based on this, the air pump 300 does not need to be disassembled during the deflation test, and the air pump 300 can be kept connected to the airtight cavity 101. After the deflation test is over, the airtight cavity 101 can be quickly inflated through the air pump 300 to quickly inflate the vehicle tire 20, so that the test device 10 can quickly perform the next round of deflation test, thereby effectively improving the test efficiency of the test device 10. In other words, after the test device 10 is installed on the hub through the base 100, the operator does not need to perform any treatment on the test device 10. The operator can remotely control the air pump 300 to inflate the vehicle tire 20 and control the electromagnetic valve 400 to deflate the vehicle tire 20, thereby effectively improving the test efficiency of the test device 10.

[0040] It should be noted that in the accompanying drawings herein, only the structural relationship and connection relationship of the inventive products of the present application are shown, and the specific structural dimensions of the inventive products of the present application are not limited thereby.

[0041] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the protection scope of the invention patent.

Claims

1. A testing device, characterized in that: The testing device is used for deflation testing of vehicle tires, and the testing device comprises: A base connected to the wheel hub of the vehicle tire, wherein the base is formed with an airtight cavity for connecting to the air cavity of the vehicle tire; A one-way valve, wherein a first channel end of the one-way valve is connected to the airtight cavity; an air pump, wherein the air outlet of the air pump is connected to the second channel end of the one-way valve, the one-way valve is configured to cut off the air intake from the first channel end to the second channel end, and to conduct the air intake from the second channel end to the first channel end, and the air pump is used to pump gas into the airtight cavity through the one-way valve to inflate the vehicle tire; An electrically controlled valve is connected to the airtight chamber and is used to selectively connect the airtight chamber to the atmosphere to achieve deflation of the vehicle tire.

2. The testing device according to claim 1, characterized in that: The testing device also includes: A control component is respectively connected to the air pump and the electric control valve for controlling the air pump to pump gas into the airtight cavity through the airtight cavity based on an inflation signal, and for controlling the electric control valve to be turned on to deflate the vehicle tire based on a deflation signal.

3. The testing device according to claim 2, characterized in that: The one-way valve, the air pump, the electric control valve and the control assembly are arranged on a middle area of ​​a side of the base facing away from the wheel hub.

4. The testing device according to claim 2, characterized in that: The electrically controlled valve is a flow electromagnetic valve, and the control component is also used to control the opening of the flow electromagnetic valve to adjust the discharge rate of the gas in the airtight cavity.

5. The testing device according to any one of claims 1 to 3, characterized in that: The base includes a cylindrical body adapted to the hub, the airtight cavity is formed inside the cylindrical body, the cylindrical body is coaxially arranged with the hub, and the base also includes a first pair of interfaces, a second pair of interfaces and a third pair of interfaces respectively connected with the airtight cavity, the first pair of interfaces is arranged on the circumferential side of the cylindrical body along the radial direction of the cylindrical body, the first pair of interfaces is used to connect with the air cavity, the second pair of interfaces and the third pair of interfaces are arranged at the end of the cylindrical body along the axial direction of the cylindrical body, the second pair of interfaces is connected to the first channel end, and the third pair of interfaces is connected to the electric control valve.

6. The testing device according to claim 5, characterized in that: The second docking port and the third docking port are disposed adjacent to the central axis of the cylindrical body.

7. The testing device according to claim 6, characterized in that: The base includes a plurality of the first pairing interfaces, and the plurality of the first pairing interfaces are evenly spaced and arranged on the circumference of the cylindrical body.

8. The testing device according to claim 2, characterized in that: The control component obtains the inflation signal and the deflation signal by wireless communication.

9. The testing device according to claim 8, characterized in that: The control component comprises: A processing circuit and a wireless communication circuit, wherein the processing circuit is connected to an external control device through the wireless communication circuit to obtain the inflation signal and the deflation signal; A first driving circuit, connected to the processing circuit and the air pump, and used to drive the air pump to work based on the control of the processing circuit; The second driving circuit is connected to the processing circuit and the electric-controlled valve, and is used to drive the electric-controlled valve to operate based on the control of the processing circuit.

10. The testing device according to claim 1, characterized in that: The testing device also includes a tire pressure detection device, which is arranged on the base. The sensing end of the tire pressure detection device is arranged in the airtight cavity to obtain the tire pressure data of the vehicle tire.

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