Totally-closed tire pressure sensing device and automobile

Abstract

The utility model provides a totally-enclosed tire pressure sensing device and automobile, the totally-enclosed tire pressure sensing device comprises a shell, a pressure sensor and an elastic air bag, the shell is provided with an accommodating space, the shell is provided with an air vent communicated with the accommodating space, the elastic air bag is arranged in the accommodating space, and the pressure sensor is arranged in the accommodating space. The elastic air bag is provided with an air inlet, the air inlet is communicated and connected with the air vent, so that a closed detection cavity is formed between the elastic air bag and the shell, the pressure sensor is arranged in the detection cavity, and the elastic air bag is communicated with a tire through the air vent and the air inlet. The elastic air bag is suitable for deforming under the action of the pressure of the tire, so that a pressure sensor obtains the air pressure of the detection chamber, and then the air pressure of the tire is obtained, so that the possibility that impurities in the tire enter the detection chamber can be reduced while the pressure intensity in the tire is detected; and the working stability and reliability of the pressure sensor are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of tire pressure sensing devices, especially a fully enclosed tire pressure sensing device and an automobile. Background Art

[0002] With the development of automobiles, the safety performance of automobiles has become more and more prominent during driving. Tire pressure safety is an important part of the safety of electric vehicles. Tire pressure monitoring is an effective means to ensure tire safety. Currently, there are two systems for monitoring tire pressure. One is indirect tire pressure monitoring, and the other is direct tire pressure monitoring. The direct tire pressure monitoring directly installs the tire pressure sensing device inside the automobile tire and then directly measures the tire pressure. The direct tire pressure detection method has a simple structure and high measurement accuracy, so it is very popular among people.

[0003] The tire pressure sensing device is directly arranged inside the tire, so that the tire pressure sensing device is in an environment of high temperature, low temperature, humidity, vibration, high-speed rotation, etc. inside the tire, resulting in a large amount of dust and moisture easily appearing inside the tire after long-term operation. And the tire pressure sensing device is mostly provided with air vents for detecting the air pressure inside the tire, which causes moisture and dust to easily enter the inside of the tire pressure sensing device, thereby resulting in inaccurate measurement results or even functional failure.

[0004] Therefore, the utility model is committed to providing a fully enclosed tire pressure sensing device and an automobile to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a fully enclosed tire pressure sensing device, which can reduce the possibility of moisture inside the tire entering the housing through the air vent and causing adverse effects on the pressure sensor while detecting the pressure inside the tire by the pressure sensor, so that the pressure sensor can stably and reliably obtain the pressure inside the tire and ensure the accuracy of tire pressure detection.

[0006] The technical solution provided by the utility model is as follows:

[0007] A fully enclosed tire pressure sensing device includes a housing, a pressure sensor and an elastic airbag. The housing has a receiving space, and the housing is provided with an air vent communicating with the receiving space.

[0008] The elastic airbag is arranged in the receiving space. The elastic airbag is provided with an air inlet, and the air inlet is conductively connected with the air vent to form a sealed detection chamber between the elastic airbag and the housing. The pressure sensor is arranged in the detection chamber.

[0009] The elastic airbag is connected to the tire through the air vent and the air inlet, and the elastic airbag is adapted to deform under the action of the pressure of the tire, so that the pressure sensor can obtain the air pressure in the detection chamber, and further obtain the magnitude of the air pressure of the tire.

[0010] In some embodiments, it further includes a connecting member. One end of the connecting member is hermetically connected to the air vent, and the other end of the connecting member extends into the accommodating space and is hermetically connected to the air inlet to form the closed detection chamber.

[0011] A gas guiding channel is provided in the connecting member, and the gas guiding channel is communicated with the tire and the elastic airbag.

[0012] In some embodiments, a limiting member is provided on the connecting member, and the limiting member is adapted to be engaged with the air vent to fixedly install the connecting member on the housing.

[0013] In some embodiments, a limiting groove matching with the pressure sensor is provided on the inner wall of the housing to fixedly install the pressure sensor in the detection chamber.

[0014] In some embodiments, a sealing assembly is provided at the connection between the connecting member and the air vent.

[0015] In some embodiments, the limiting member includes a first protrusion and a second protrusion which are spaced along the direction of the connecting member close to the elastic airbag, and both the first protrusion and the second protrusion are arranged along the circumferential direction of the connecting member;

[0016] When one end of the connecting member is connected to the air vent, the housing at the air vent is clamped between the first protrusion and the second protrusion.

[0017] In some embodiments, an extension part is further provided inside one end of the air vent close to the elastic airbag, and the extension part is arranged along the circumferential direction of the air vent;

[0018] When one end of the connecting member is connected to the air vent, the extension part is clamped between the first protrusion and the second protrusion.

[0019] In some embodiments, the sealing assembly includes a first sealing member and a second sealing member. The first sealing member is arranged between the first protrusion and the extension part;

[0020] The second sealing member is arranged between the extension part and the connecting member.

[0021] In some embodiments, the housing is spherical.

[0022] In some embodiments, the pressure sensor includes a circuit board, as well as a battery and a sensing element disposed on the circuit board, and the battery is electrically connected to the circuit board and the sensing element.

[0023] An automobile includes a fully enclosed tire pressure sensing device as described in any one of the above, and further includes:

[0024] A tire, and the fully enclosed tire pressure sensing device is disposed inside the tire.

[0025] A fully enclosed tire pressure sensing device provided by the present utility model has the following beneficial effects:

[0026] 1. For the fully enclosed tire pressure sensing device provided by the present utility model, an elastic airbag is disposed in the accommodating space of the outer shell, and the air inlet of the elastic airbag is conductively connected to the vent hole on the outer shell, so that the elastic airbag is connected to the inside of the tire. The pressure sensor is disposed in the sealed detection chamber between the elastic airbag and the outer shell. Due to the obstructive effect of the elastic airbag, dust and moisture in the tire are difficult to enter the detection chamber, thereby reducing the possibility of the pressure sensor being adversely affected by dust and moisture, and further ensuring that the pressure sensor can operate stably and reliably. Moreover, when the air pressure in the tire changes, the elastic airbag expands or contracts under the action of the pressure in the tire until the air pressure in the detection chamber is the same as that in the elastic airbag and the tire, and then the elastic airbag stops deforming. At this time, the air pressure in the detection chamber detected by the pressure sensor is the air pressure in the tire, thereby realizing the detection of the tire pressure.

[0027] 2. For the fully enclosed tire pressure sensing device provided by the present utility model, the connecting member is provided with a first protrusion and a second protrusion, so that the outer shell at the vent hole is clamped between the first protrusion and the second protrusion, ensuring the connection strength between the connecting member and the outer shell.

[0028] 3. For the fully enclosed tire pressure sensing device provided by the present utility model, a first sealing member is disposed between the first protrusion and the extension portion, and a second sealing member is disposed between the extension portion and the connecting member. The first sealing member and the second sealing member cooperate with each other to improve the sealing performance between the connecting member and the outer shell, and reduce the possibility of moisture and dust entering the inside of the outer shell through the connection between the connecting member and the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present solution in a clear and understandable manner in conjunction with the drawings of the preferred embodiments.

[0030] Figure 1 is a structural schematic diagram of a fully enclosed tire pressure sensing device provided by the present utility model;

[0031] Figure 2 It is a cross-sectional view of a fully enclosed tire pressure sensing device provided by the present utility model in one state;

[0032] Figure 3 It is a cross-sectional view of a fully enclosed tire pressure sensing device provided by the present utility model in another state;

[0033] Figure 4 It is a schematic structural diagram of a connecting member of a fully enclosed tire pressure sensing device provided by the present utility model.

[0034] Explanation of the reference numerals in the drawings:

[0035] Outer shell 1, ventilation port 11, extension part 111, detection chamber 12, limiting groove 13, pressure sensor 2, connecting member 3, first protruding part 31, second protruding part 32, elastic airbag 4. Detailed implementation manners

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific implementation manners of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts, and other implementation manners can also be obtained.

[0037] For the sake of simplicity of the drawings, only the parts related to the present utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0038] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0040] In one embodiment, a fully enclosed tire pressure sensing device is described. By arranging an elastic airbag 4 inside the outer shell 1, the pressure sensor 2 located in the detection chamber 12 can detect the tire pressure while the elastic airbag 4 can play a protective role, reducing the adverse effects on the pressure sensor 2 caused by dust and moisture in the tire entering the detection chamber 12 through the vent 11, thereby ensuring that the pressure sensor 2 can stably and reliably detect the tire pressure and guaranteeing the accuracy of tire pressure detection.

[0041] Specifically, referring to the accompanying drawings of the specification Figures 1 to 4 , a fully enclosed tire pressure sensing device includes an outer shell 1, a pressure sensor 2, and an elastic airbag 4. Among them, the outer shell 1 has an accommodation space, and a vent 11 is provided on the outer shell 1, and the vent 11 is in communication with the accommodation space. Correspondingly, the elastic airbag 4 is arranged inside the outer shell 1, and an air inlet is provided on the elastic airbag 4, and the air inlet is conductively connected to the vent 11, so that the gas in the tire enters the inside of the elastic airbag 4 through the vent 11 and the air inlet.

[0042] It should be noted that by arranging the elastic airbag 4 inside the outer shell 1, a detection chamber 12 is formed between the elastic airbag 4 and the outer shell 1. The detection chamber 12 is a closed space, so that the gas in the detection chamber 12 cannot be exchanged with the gas in the tire, and the pressure sensor 2 is arranged in the detection chamber 12 for the pressure sensor 2 to obtain the air pressure in the detection chamber 12.

[0043] It can be understood that in the prior art, in order to obtain the air pressure in the tire, a vent 11 is generally provided on the outer shell of the tire pressure sensing device for the pressure sensor to obtain the air pressure in the tire through the vent. However, due to the setting of the vent, moisture, dust, etc. inside the tire enter the outer shell, and then the pressure sensor is prone to malfunction, resulting in the abnormal operation of the pressure sensing device. In this embodiment, the elastic airbag 4 is conductively connected to the vent 11 of the outer shell 1, and the elastic airbag 4 can play a role in isolating moisture and dust, thereby reducing the possibility of moisture and dust entering the detection chamber 12 and damaging the pressure sensor 2.

[0044] The working principle of this fully enclosed tire pressure sensing device is as follows: According to the atmospheric pressure balance principle, when the air pressure in the tire changes, the gas in the tire and the gas in the elastic airbag 4 will exchange, causing the elastic airbag 4 to deform until the air pressure in the tire, the air pressure in the elastic airbag 4, and the air pressure in the detection chamber 12 are balanced (equal), and then the elastic airbag 4 will no longer deform. At this time, the air pressure in the detection chamber 12 is obtained in the detection chamber 12, that is, the tire pressure is obtained. Specifically, referring to the accompanying drawings of the specification Figure 2, the tire pressure is in a normal state at this time. When the tire pressure increases (such as inflating air into the tire), the gas in the tire enters the elastic airbag 4, causing the volume of the elastic airbag 4 to increase. Since the detection chamber 12 is a closed space, the volume of the detection chamber 12 decreases and the air pressure increases. When the volume of the elastic airbag 4 no longer changes, the tire pressure, the air pressure of the elastic airbag 4, and the air pressure in the detection chamber 12 are in balance, and then the tire pressure is obtained through the pressure sensor 2.

[0045] Correspondingly, a fully enclosed tire pressure sensor further includes a connecting piece 3. The connecting piece 3 is arranged in the accommodating space of the housing 1 through the air vent 11. One end of the connecting piece 3 is hermetically connected to the inner wall of the air vent 11, and the other end of the connecting piece 3 extends into the accommodating space of the housing 1 and is hermetically connected to the air inlet of the elastic airbag 4. In addition, a gas guiding channel is arranged in the connecting piece 3, and the gas guiding channel is communicated with the tire and the elastic airbag 4, so that the gas in the tire can enter the elastic airbag 4 through the air vent 11, the gas guiding channel and the air inlet. Moreover, the connecting piece 3 is hermetically connected to the housing 1 and the elastic airbag 4, so that the gas in the tire can only enter the elastic airbag 4 through the connecting piece 3, thereby affecting the air pressure in the hermetically arranged detection chamber 12.

[0046] In one embodiment, this embodiment further describes a fully enclosed tire pressure sensing device. Among them, a limiting member is arranged on the connecting piece 3, and the connecting piece 3 is clamped and matched with the air vent 11 through the limiting member to connect and fix the connecting piece 3 and the housing 1.

[0047] Specifically, refer to the accompanying drawings of the specification Figure 4 , the limiting member includes a first protruding portion 31 and a second protruding portion 32 that are sequentially arranged at intervals along the direction in which the connecting piece 3 approaches the elastic airbag 4. The first protruding portion 31 and the second protruding portion 32 are both arranged along the circumferential direction of the connecting piece 3. When the connecting piece 3 is clamped and matched with the housing 1 through the limiting member, the housing 1 at the air vent 11 is clamped between the first protruding portion 31 and the second protruding portion 32, so that the first protruding portion 31 is located outside the housing 1 and the second protruding portion 32 is located inside the housing 1.

[0048] Furthermore, an extension portion 111 is arranged at one end of the air vent 11 close to the elastic airbag 4. The extension portion 111 is connected to the inner wall of the air vent 11 and is arranged along the circumferential direction of the air vent 11. When the connecting piece 3 is clamped and matched with the air vent 11, the extension portion 111 is clamped between the first protruding portion 31 and the second protruding portion 32.

[0049] Preferably, the thickness of the part of the vent hole 11 without the extension part 111 is greater than the thickness of the first protrusion 31, so as to prevent the connecting part 3 from colliding with the tire when the tire moves and ensure the reliability of the connecting part 3. Of course, when the extension part 111 is not provided in the vent hole 11, the thickness of the outer shell 1 at the vent hole 11 can be appropriately increased so that the vent hole 11 protrudes from the outer shell 1, thereby increasing the possibility of moisture and dust in the tire entering the elastic airbag 4.

[0050] Of course, in actual production applications, the limiting part can also be used in other ways to realize the connection and fixation between the connecting part 3 and the outer shell 1, such as using glue, screw connection, etc. which will not be elaborated here, and all are within the protection scope of the present utility model.

[0051] Furthermore, a sealing assembly is also provided at the connection between the vent hole 11 and the connecting part 3. Specifically, the sealing assembly includes a first seal and a second seal. The first seal is arranged between the first protrusion 31 and the extension part 111. Similarly, the second seal is arranged between the extension part 111 and the connecting part 3.

[0052] Both the first seal and the second seal can be set as sealing washers, or several waterproof grooves can be arranged on the side of the first protrusion 31 close to the extension part 111, and waterproof protrusions matching the waterproof grooves can be arranged on the side of the extension part 111 close to the first protrusion 31. The waterproof grooves and the waterproof protrusions are clamped and matched to ensure the sealing between the first protrusion 31 and the extension part 111. Similarly, mutually meshing waterproof grooves and waterproof protrusions can also be arranged between the extension part 111 and the connecting part 3.

[0053] In one embodiment, the outer shell 1 is spherical. When in use, a fully enclosed tire pressure sensing device is directly placed inside the tire without using other fixing devices. Preferably, a protective cover made of soft rubber material can be sleeved on the outer side of the outer shell 1. Correspondingly, a through hole communicating with the vent hole 11 is also arranged on the protective cover to further protect the tire pressure sensing device and extend its service life.

[0054] Furthermore, a limiting groove 13 is also arranged on the inner wall of the outer shell 1. The pressure sensor 2 is adapted to be clamped and matched with the limiting groove 13 to install and fix the pressure sensor 2 in the detection chamber 12.

[0055] Furthermore, the pressure sensor 2 includes a circuit board, a battery and a sensing element. The battery and the sensing element are both arranged on the circuit board, and the battery is electrically connected to the sensing element and the circuit board.

[0056] In one embodiment, this embodiment provides an automobile, which includes a fully enclosed tire pressure sensing device described in any of the above embodiments, and also includes a tire. The fully enclosed tire pressure sensing device described in the above embodiments is arranged inside the tire. In this embodiment, the tire pressure of the tire can be obtained through the fully enclosed tire pressure sensing device, and it is not easily affected by moisture and dust inside the tire, with reliable and stable operation and a long service life.

[0057] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A fully enclosed tire pressure sensing device, characterized in that, It includes a housing, a pressure sensor and an elastic airbag. The housing has a receiving space, and an air vent communicating with the receiving space is formed on the housing. The elastic airbag is arranged in the receiving space. An air inlet is arranged on the elastic airbag. The air inlet is conductively connected to the air vent to form a sealed detection chamber between the elastic airbag and the housing. The pressure sensor is arranged in the detection chamber. The elastic airbag is connected to the tire through the air vent and the air inlet, and the elastic airbag is adapted to deform under the action of the pressure of the tire, so that the pressure sensor can obtain the air pressure in the detection chamber, and further obtain the air pressure of the tire.

2. The fully enclosed tire pressure sensing device according to claim 1, characterized in that, It further includes a connecting piece. One end of the connecting piece is hermetically connected to the air vent, and the other end of the connecting piece extends into the receiving space and is hermetically connected to the air inlet to form the sealed detection chamber. A gas guiding channel is formed in the connecting piece, and the gas guiding channel communicates with the tire and the elastic airbag.

3. A fully enclosed tire pressure sensing device according to claim 2, characterized in that, A limiting piece is arranged on the connecting piece. The limiting piece is adapted to be clamped and matched with the air vent to install and fix the connecting piece on the housing.

4. A fully enclosed tire pressure sensing device according to claim 1, characterized in that, A limiting groove matched with the pressure sensor is arranged at the inner wall of the housing to install and fix the pressure sensor in the detection chamber.

5. The fully enclosed tire pressure sensing device according to claim 3, characterized in that, A sealing assembly is arranged at the connection between the connecting piece and the air vent.

6. The fully enclosed tire pressure sensing device according to claim 5, characterized in that, The limiting piece includes a first protruding part and a second protruding part which are arranged at intervals along the direction of the connecting piece close to the elastic airbag. Both the first protruding part and the second protruding part are arranged along the circumferential direction of the connecting piece. When one end of the connecting piece is connected to the air vent, the housing at the air vent is clamped between the first protruding part and the second protruding part.

7. The fully enclosed tire pressure sensing device according to claim 6, wherein, An extension part is further arranged inside one end of the air vent close to the elastic airbag. The extension part is arranged along the circumferential direction of the air vent. When one end of the connecting piece is connected to the air vent, the extension part is clamped between the first protruding part and the second protruding part.

8. A fully enclosed tire pressure sensing device according to claim 7, characterized in that, The sealing assembly includes a first sealing piece and a second sealing piece. The first sealing piece is arranged between the first protruding part and the extension part. The second sealing piece is arranged between the extension part and the connecting piece.

9. A fully enclosed tire pressure sensing device according to any one of claims 1-8, characterized in that, The housing is spherical.

10. The fully enclosed tire pressure sensing device according to claim 4, characterized in that, The pressure sensor includes a circuit board, a battery and a sensing element arranged on the circuit board. The battery is electrically connected to the circuit board and the sensing element.

11. An automobile, characterized in that, A fully enclosed tire pressure sensing device according to any one of claims 1-10 further includes: A tire, and the fully enclosed tire pressure sensing device is arranged inside the tire.

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