External tire pressure monitoring device

Abstract

The utility model discloses an external tire pressure monitoring device which comprises a rear cover assembly, a tire pressure monitoring assembly and a tire pressure monitoring assembly, the rear cover assembly comprises a containing cavity, an opening is formed in the top of the containing cavity, a power supply assembly and a circuit board are contained in the containing cavity, and the power supply assembly is electrically connected with the circuit board; the front cover assembly covers the top of the rear cover assembly, an inflating valve and a tire pressure monitoring cavity communicated with the inflating valve are arranged on the front cover assembly, the bottom end of the tire pressure monitoring cavity is welded to the circuit board to form a cavity, and a tire pressure monitoring sensor is arranged on the circuit board and is arranged in the cavity. According to the utility model, the tire pressure monitoring cavity is arranged, the bottom of the tire pressure monitoring cavity is welded with the circuit board, and the circuit board does not need to be fixed in the rear cover assembly through screws, so that even if the circuit board is in a high-temperature state, the stress generated by the circuit board does not cause excessive deformation of the circuit board; and the condition of inaccurate tire pressure monitoring caused by gas leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire pressure monitoring technology field especially discloses an external tire pressure monitoring device. BACKGROUND

[0002] The tire pressure monitoring device is a testing and feedback device for monitoring the air pressure in the tire of a vehicle or other means of transport, which has been widely used and has brought much convenience to people. However, the common tire pressure monitoring device is an internal tire pressure monitoring device, which is placed inside the tire to monitor the air pressure in the tire at all times and transmit the air pressure signal to the cab to realize the function of monitoring the air pressure. The internal tire pressure monitoring device has the disadvantage of inconvenient installation and maintenance.

[0003] To solve the above technical problems, an external tire pressure monitoring device has been designed on the market, which realizes the tire pressure monitoring function by being installed in the valve core of the tire. The design of the sealing system inside the tire pressure monitoring device, which is a device for monitoring the air pressure, is very important. Improper design can cause inaccurate monitoring, affect the quality of the entire product, and even cause driving hazards. In order to save space, the sensor for tire pressure monitoring is usually directly arranged on the circuit board in the existing tire pressure monitoring device, and a cavity is arranged on the circuit board. The cavity is in communication with the valve nozzle, and a sealing space for tire pressure detection is formed between the cavity and the circuit board. The gas is introduced into the cavity from the valve nozzle, and then the pressure of the gas in the cavity is detected by the sensor. The circuit board is fixed on the shell of the tire pressure monitoring device by screws. However, when the tire pressure of a heavy truck is monitored, a large amount of heat is generated during the driving process of the heavy truck tire, so that the temperature of the gas in the tire rises. When the temperature of the gas introduced into the cavity is too high, the high temperature will cause stress in the circuit board, and the circuit board is fixed on the shell by screws. Under the action of stress, the circuit board will deform greatly, causing a gap between the circuit board and the cavity, reducing the sealing performance of the cavity, and thus affecting the accuracy of tire pressure monitoring. SUMMARY

[0004] The utility model provides a kind of external tire pressure monitoring device, to solve the problem of inaccurate tire pressure detection of the existing external tire pressure monitoring device.

[0005] In order to solve the above problems, the utility model provides a kind of external tire pressure monitoring device, it includes: rear cover assembly, including accommodating cavity, accommodating cavity top opening, accommodating cavity content is housed power supply component and circuit board, power supply component and circuit board electrically connected;Front cover assembly, front cover assembly is covered in the top of rear cover assembly, front cover assembly is provided with air valve and with the tire pressure monitoring cavity of air valve communication, the bottom end of tire pressure monitoring cavity is welded on circuit board to form cavity, circuit board is provided with tire pressure monitoring sensor, and tire pressure monitoring sensor is set in cavity.

[0006] As a further improvement of the utility model, air valve is provided with air valve gasket around.

[0007] As a further improvement of the utility model, the inner side wall of rear cover assembly is provided with first internal thread, and the outer side wall of front cover assembly is provided with first external thread matched with the first internal thread, and front cover assembly is screwed with rear cover assembly.

[0008] As a further improvement of the utility model, sealing ring is arranged at the screwing position of front cover assembly and rear cover assembly.

[0009] As a further improvement of the utility model, nut is arranged at the top of front cover assembly, and through hole is arranged in the nut.

[0010] As a further improvement of the utility model, front cover assembly includes first cover body part and first screwing part, nut is arranged at the top of first cover body part, first screwing part is arranged at the bottom of first cover body part, air valve is fixedly arranged in through hole, the inner side wall of first screwing part is provided with second internal thread, the outer side wall of tire pressure monitoring cavity is provided with second external thread matched with the second internal thread, tire pressure monitoring cavity is screwed with first screwing part, and sealing gasket is arranged between the top of tire pressure monitoring cavity and the top of first screwing part.

[0011] As a further improvement of the utility model, nut is arranged at the top of front cover assembly, screw hole is arranged at the bottom of front cover assembly, the top end of screw hole is communicated with the bottom end of through hole, the inner side wall of screw hole is provided with third internal thread, the outer side wall of tire pressure monitoring cavity is provided with third external thread matched with the third internal thread, air valve is arranged at the top of tire pressure monitoring cavity, and tire pressure monitoring cavity is screwed with screw hole and air valve extends into through hole.

[0012] As a further improvement of the utility model, nut is arranged at the top of front cover assembly, air valve is fixedly arranged in through hole, and tire pressure monitoring cavity is fixedly arranged at the bottom of front cover assembly.

[0013] As a further improvement of the utility model, the front cover assembly comprises a second cover body part and a second screwing part, the second cover body part is provided with a through hole, a fourth internal thread is arranged on the inner side wall of the through hole, a fourth external thread matched with the fourth internal thread is arranged on the outer side wall of the second screwing part, the second cover body part is screwed with the second screwing part, the nut is arranged on the top of the second screwing part, the valve nozzle is fixedly arranged in the through hole, and the tire pressure monitoring cavity is arranged at the bottom of the second screwing part.

[0014] As a further improvement of the utility model, the front cover assembly comprises a third cover body part and a third screwing part, the nut is arranged on the top of the third cover body part, the through hole is arranged in the nut and penetrates the third cover body part, a fifth internal thread is arranged in the nut, a fifth external thread matched with the fifth internal thread is arranged on the outer side wall of the third screwing part, the third cover body part is screwed with the third screwing part, the third screwing part is hollow inside, the valve nozzle is fixedly arranged in the third screwing part, and the tire pressure monitoring cavity is arranged at the bottom of the third screwing part.

[0015] The utility model discloses the beneficial effects achieved are:

[0016] The utility model provides a kind of external tire pressure monitoring device, by setting up tire pressure monitoring cavity, and the bottom of tire pressure monitoring cavity is welded with circuit board, circuit board does not need to be fixed to rear cover assembly by screw, so that the gas that is high-temperature gas when being passed into tire pressure monitoring cavity, even if circuit board produces stress, but circuit board is not fixedly connected with rear cover assembly, so that circuit board will not occur excessive deformation, gap will not be generated between circuit board and tire pressure monitoring cavity, guarantee the air seal of tire pressure monitoring cavity, to guarantee the accuracy of tire pressure monitoring result further. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is whole structure schematic diagram of an embodiment of the utility model external tire pressure monitoring device;

[0018] Figure 2 It is exploded structure schematic diagram of an embodiment of the utility model external tire pressure monitoring device;

[0019] Figure 3 It is structure schematic diagram of the front cover assembly of an embodiment of the utility model external tire pressure monitoring device;

[0020] Figure 4 It is exploded structure schematic diagram of another embodiment of the utility model external tire pressure monitoring device;

[0021] Figure 5 It is structure schematic diagram of the front cover assembly of another embodiment of the utility model external tire pressure monitoring device;

[0022] Figure 6This is an exploded structural diagram of yet another embodiment of the external tire pressure monitoring device of this utility model;

[0023] Figure 7 This is a schematic diagram of the front cover assembly of another embodiment of the external tire pressure monitoring device of this utility model;

[0024] Figure 8 This is an exploded structural diagram of another embodiment of the external tire pressure monitoring device of this utility model;

[0025] Figure 9 This is a schematic diagram of the second screw connection in another embodiment of the external tire pressure monitoring device of this utility model;

[0026] Figure 10 An exploded structural diagram of an embodiment of the external tire pressure monitoring device of this utility model is also provided;

[0027] Figure 11 This is a schematic diagram of the third screw connection of an embodiment of the external tire pressure monitoring device of this utility model. Detailed Implementation

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] Figure 1 This diagram illustrates the structure of one embodiment of the external tire pressure monitoring device of this utility model. Please refer to it as well. Figure 1 , Figure 2 and Figure 3 The external tire pressure monitoring device includes a rear cover assembly 1 and a front cover assembly 2.

[0030] The back cover assembly 1 includes a receiving cavity 11 with an opening at the top. The receiving cavity 11 contains a power supply assembly 12 and a circuit board 13, and the power supply assembly 12 is electrically connected to the circuit board 13. The back cover assembly 1 is cylindrical. The power supply assembly 12 includes a battery 121 and a battery holder 122. The battery 121 is mounted on the battery holder 122, and the battery holder 122 is connected to the circuit board 13. The battery 121 supplies power to the circuit board 13.

[0031] The front cover assembly 2 covers the top of the rear cover assembly 1 and completely seals the opening at the top of the accommodating cavity 11. The front cover assembly 2 is provided with a valve stem 21 and a tire pressure monitoring cavity 22 communicating with the valve stem 21. The bottom end of the tire pressure monitoring cavity 22 is soldered to the circuit board 13 to form a cavity. The circuit board 13 is provided with a tire pressure monitoring sensor 131, and the tire pressure monitoring sensor 131 is disposed in the cavity.

[0032] Specifically, when the tire pressure monitoring is performed by using the external tire pressure monitoring device, the valve stem 21 of the tire pressure monitoring device is connected with the valve core of the tire and presses the valve core, so that the gas in the tire passes through the valve core and then passes through the valve stem 21 to enter the tire pressure monitoring cavity 22, so that the inside of the tire pressure monitoring cavity 22 is communicated with the inside of the tire, and the gas pressure in the tire pressure monitoring cavity 22 is the same as the gas pressure in the tire. Then, the pressure of the gas in the tire pressure monitoring cavity 22 is detected by using the tire pressure monitoring sensor 131, and the pressure of the gas in the tire pressure monitoring cavity 22 is obtained, which is the tire pressure of the tire. It should be understood that the circuit board 13 and the bottom end of the tire pressure monitoring cavity 22 are welded by using lead-free soldering, and the melting point of the welding position reaches more than 200 degrees Celsius. In the driving state, the temperature of the gas in the tire generally rises to 60 to 130 degrees, which does not affect the welding between the circuit board 13 and the tire pressure monitoring cavity 22.

[0033] It should be noted that in the embodiment, the front cover assembly 2 and the tire pressure monitoring cavity 22 are made of metal materials.

[0034] The external tire pressure monitoring device of the embodiment is provided with the tire pressure monitoring cavity 22, and the bottom of the tire pressure monitoring cavity 22 is welded with the circuit board 13. The circuit board 13 does not need to be fixed into the rear cover assembly 1 by using screws, so that when the gas entering the tire pressure monitoring cavity 22 is high-temperature gas, the circuit board 13 will generate stress. However, the circuit board 13 is not fixedly connected with the rear cover assembly 1, so that the circuit board 13 will not be deformed excessively, and a gap will not be generated between the circuit board 13 and the tire pressure monitoring cavity 22, so as to ensure the air tightness of the tire pressure monitoring cavity 22, and further ensure the accuracy of the tire pressure monitoring result.

[0035] Further, in order to avoid damaging the valve stem 21 and the valve core of the tire, in some embodiments, as shown in Figure 2 and Figure 3 , the valve stem 21 is provided with a valve stem gasket 23 around.

[0036] The valve stem gasket 23 provided in the embodiment has a buffering effect, which avoids the damage caused by the collision between the valve stem 21 and the valve core of the tire.

[0037] Further, in order to facilitate the replacement of the battery 121, in some embodiments, as shown in Figure 2 and Figure 3 , the inner side wall of the rear cover assembly 1 is provided with a first inner thread 14, and the outer side wall of the front cover assembly 2 is provided with a first outer thread 24 matched with the first inner thread 14, and the front cover assembly 2 is screwed with the rear cover assembly 1.

[0038] In the embodiment, the front cover assembly 2 and the rear cover assembly 1 are screwed, so that the front cover assembly 2 can be easily taken off from the rear cover assembly 1, and the battery 121 in the rear cover assembly 1 can be replaced.

[0039] Further, in order to improve the sealing between the front cover assembly 2 and the rear cover assembly 1, in some embodiments, as shown in Figure 2 and Figure 3 , a sealing ring 25 is arranged at the screwing position of the front cover assembly 2 and the rear cover assembly 1.

[0040] In this embodiment, by arranging the sealing ring 25 at the screwing position of the front cover assembly 2 and the rear cover assembly 1, the waterproof and dustproof effects are achieved, and the water and dust are prevented from entering the accommodating cavity 11 to cause damage to the circuit board 13.

[0041] Further, in order to facilitate the installation of the external tire pressure monitoring device on the valve core of the tire, in some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , a nut 26 is arranged on the top of the front cover assembly 2, and a through hole 261 is arranged in the nut 26.

[0042] In this embodiment, by arranging the nut 26 on the top of the front cover assembly 2, the user can tighten the external tire pressure monitoring device on the valve core of the tire by using a small wrench.

[0043] Further, as shown in Figure 2 and Figure 3 , in other embodiments, the front cover assembly 2 comprises a first cover body part 27A and a first screwing part 28A, the nut 26 is arranged on the top of the first cover body part 27A, the first screwing part 28A is arranged on the bottom of the first cover body part 27A, the valve nozzle 21 is fixedly arranged in the through hole 261, the inner side wall of the first screwing part 28A is provided with a second inner thread 281A, the outer side wall of the tire pressure monitoring cavity 22 is provided with a second outer thread 221A matched with the second inner thread 281A, the tire pressure monitoring cavity 22 is screwed with the first screwing part 28A, so that most of the tire pressure monitoring cavity 22 is accommodated in the first screwing part 28A, the structural stability of the tire pressure monitoring cavity 22 is enhanced, the pressure bearing capacity is stronger, and a sealing gasket 222 is arranged between the top of the tire pressure monitoring cavity 22 and the top of the first screwing part 28A, which further improves the sealing of the tire pressure monitoring cavity 22 and prevents gas leakage.

[0044] Further, as shown in Figure 4 and Figure 5As shown, in some other embodiments, a nut 26 is disposed on the top of the front cover assembly 2, and a screw hole 29 is disposed on the bottom of the front cover assembly 2. The top end of the screw hole 29 communicates with the bottom end of the through hole 261. A third internal thread 291 is disposed on the inner side wall of the screw hole 29. A third external thread 221B matching the third internal thread 291 is disposed on the outer side wall of the tire pressure monitoring chamber 22. A valve stem 21 is disposed on the top of the tire pressure monitoring chamber 22, that is, the valve stem 21 and the tire pressure monitoring chamber 22 are integrally disposed. The tire pressure monitoring chamber 22 is screwed to the screw hole 29 and the valve stem 21 extends into the through hole 261.

[0045] In this embodiment, the valve stem 21 and the tire pressure monitoring chamber 22 are integrated into one unit, thereby avoiding air leakage between the valve stem 21 and the tire pressure monitoring chamber 22.

[0046] Furthermore, such as Figure 6 and Figure 7 As shown, in some other embodiments, the nut 26 is disposed on the top of the front cover assembly 2, the valve stem 21 is fixedly disposed in the through hole 261, and the tire pressure monitoring chamber 22 is fixedly disposed on the bottom of the front cover assembly 2.

[0047] In this embodiment, the tire pressure monitoring chamber 22 is integrated with the front cover assembly 2, thereby avoiding air leakage between the tire pressure monitoring chamber 22 and the front cover assembly 2.

[0048] Furthermore, such as Figure 8 and Figure 9 As shown, in some other embodiments, the front cover assembly 2 includes a second cover portion 27B and a second threaded portion 28B. The second cover portion 27B is provided with a through hole 271B. A fourth internal thread 272B is provided on the inner sidewall of the through hole 271B. A fourth external thread 281B that matches the fourth internal thread 272B is provided on the outer sidewall of the second threaded portion 28B. The second cover portion 27B is threaded to the second threaded portion 28B. A nut 26 is provided at the top of the second threaded portion 28B. A valve stem 21 is fixedly provided in the through hole 261. A tire pressure monitoring chamber 22 is provided at the bottom of the second threaded portion 28B.

[0049] In this embodiment, the tire pressure monitoring chamber 22 and the second screw connection 28B are integrated, and the valve 21 is located in the second screw connection 28B and communicates with the tire pressure monitoring chamber 22, thereby avoiding air leakage between the tire pressure monitoring chamber 22 and the second screw connection 28B.

[0050] Furthermore, such as Figure 10 and Figure 11As shown, in some other embodiments, the front cover assembly 2 comprises a third cover body part 27C and a third screw part 28C, a nut 26 is arranged on the top of the third cover body part 27C, a through hole 261 is arranged in the nut 26 and penetrates the third cover body part 27C, a fifth internal thread 262 is arranged in the nut 26, a fifth external thread 281C matching the fifth internal thread 262 is arranged on the outer side wall of the third screw part 28C, the third cover body part 27C is screwed with the third screw part 28C, the third screw part 28C is hollow inside, the valve stem 21 is fixedly arranged in the third screw part 28C, and the tire pressure monitoring cavity 22 is arranged at the bottom of the third screw part 28C.

[0051] In this embodiment, the tire pressure monitoring cavity 22 is arranged integrally with the third screw part 28C, and the valve stem 21 is arranged in the third screw part 28C and communicates with the tire pressure monitoring cavity 22, so that the air leakage between the tire pressure monitoring cavity 22 and the third screw part 28C is avoided.

[0052] Although the preferred embodiments of the present application have been described, those skilled in the art who have the basic inventive concept can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the present application. Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and changes.

Claims

1. An external tire pressure monitoring device, characterized by, It includes: A rear cover assembly including a receiving cavity, the receiving cavity being open at the top, the receiving cavity containing a power supply assembly and a circuit board, the power supply assembly being electrically connected with the circuit board; A front cover assembly, the front cover assembly being covered on the top of the rear cover assembly, the front cover assembly being provided with a valve and a tire pressure monitoring cavity communicating with the valve, the bottom end of the tire pressure monitoring cavity being welded on the circuit board to form a cavity, the circuit board being provided with a tire pressure monitoring sensor, and the tire pressure monitoring sensor being arranged in the cavity.

2. The external tire pressure monitoring device of claim 1, wherein The valve is provided with a valve gasket around.

3. The external tire pressure monitoring device of claim 1, wherein The inner side wall of the rear cover assembly is provided with a first inner thread, and the outer side wall of the front cover assembly is provided with a first outer thread matched with the first inner thread, and the front cover assembly is screwed with the rear cover assembly.

4. The external tire pressure monitoring device of claim 3, wherein The front cover assembly and the rear cover assembly are provided with a sealing ring at the screwing position.

5. The external tire pressure monitoring device according to one of claims 1 to 4, characterized in that The top of the front cover assembly is provided with a nut, and the nut is provided with a through hole.

6. The external tire pressure monitoring device of claim 5, wherein, The front cover assembly includes a first cover body part and a first screwing part, the nut is arranged on the top of the first cover body part, the first screwing part is arranged on the bottom of the first cover body part, the valve is fixedly arranged in the through hole, the inner side wall of the first screwing part is provided with a second inner thread, the outer side wall of the tire pressure monitoring cavity is provided with a second outer thread matched with the second inner thread, the tire pressure monitoring cavity is screwed with the first screwing part, and a sealing gasket is arranged between the top of the tire pressure monitoring cavity and the top of the first screwing part.

7. The external tire pressure monitoring device of claim 5, wherein, The nut is arranged on the top of the front cover assembly, the bottom of the front cover assembly is provided with a screw hole, the top end of the screw hole communicates with the bottom end of the through hole, the inner side wall of the screw hole is provided with a third inner thread, the outer side wall of the tire pressure monitoring cavity is provided with a third outer thread matched with the third inner thread, the valve is arranged on the top of the tire pressure monitoring cavity, and the tire pressure monitoring cavity is screwed with the screw hole and the valve extends into the through hole.

8. The external tire pressure monitoring device of claim 5, wherein, The nut is arranged on the top of the front cover assembly, the valve is fixedly arranged in the through hole, and the tire pressure monitoring cavity is fixedly arranged on the bottom of the front cover assembly.

9. The external tire pressure monitoring device of claim 5, wherein, The front cover assembly includes a second cover body part and a second screwing part, the second cover body part is provided with a through hole, the inner side wall of the through hole is provided with a fourth inner thread, the outer side wall of the second screwing part is provided with a fourth outer thread matched with the fourth inner thread, the second cover body part is screwed with the second screwing part, the nut is arranged on the top of the second screwing part, the valve is fixedly arranged in the through hole, and the tire pressure monitoring cavity is arranged on the bottom of the second screwing part.

10. The external tire pressure monitoring device of claim 5, wherein, The front cover assembly comprises a third cover body and a third screw joint, the nut is arranged on the top of the third cover body, the through hole is arranged in the nut and penetrates through the third cover body, the fifth internal thread is arranged in the nut, the fifth external thread matched with the fifth internal thread is arranged on the outer side wall of the third screw joint, the third cover body is screwed with the third screw joint, the third screw joint is hollow inside, the valve stem is fixedly arranged in the third screw joint, and the tire pressure monitoring cavity is arranged at the bottom of the third screw joint.

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