Valve assembly and tire pressure sensor thereof

Abstract

The utility model discloses a valve assembly and a tire pressure sensor thereof, the valve assembly comprises: a valve member, the valve member comprises an air outlet hole and an air inlet hole, the air outlet hole is located in a deformation space enclosed by a rim and a tire; the fastening piece is arranged on the air valve piece in a sleeving mode so that the air valve piece can be fixed to a rim; the dustproof cover is arranged on the air inlet hole in a sleeving manner; wherein the fastener is in clearance fit with the dustproof cover. By means of the mode, maintenance personnel can disassemble the fastener without disassembling the dustproof cover, the disassembling steps of the valve assembly are simplified, the disassembling time of the valve assembly is shortened, and the working efficiency of disassembling the valve assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a valve assembly and its tire pressure sensor. Background Technology

[0002] TPMS, or Tire Pressure Monitoring System, is designed to automatically monitor tire pressure in real time while a vehicle is in motion, alerting drivers to leaks and low pressure to ensure driving safety. Currently, TPMS implementations involve connecting a sensor to the valve stem, which is then fixed to the tire. Existing valve stem assemblies typically include a valve stem body, a dust cap, and a locking nut. The valve stem body is mounted to the rim via the locking nut. When removing the tire pressure sensor, technicians must first remove the dust cap before removing the locking nut to detach the sensor from the rim. This lengthy process results in inefficient tire pressure sensor removal. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a valve assembly and its tire pressure sensor to solve the technical problem that when disassembling the tire pressure sensor, the maintenance personnel first need to remove the dust cover of the valve stem before they can remove the valve stem fastening nut, which takes a long time and results in low tire pressure sensor disassembly efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, embodiments of the present invention provide a valve assembly fixed to a wheel rim. The valve assembly includes: a valve member, which includes an exhaust port and an intake port, the exhaust port being located in the deformation space formed by the wheel rim and the tire; a fastener, which is sleeved on the valve member such that the valve member is fixed to the wheel rim; and a dust cover, which is sleeved on the intake port. The fastener and the dust cover are clearance-fitted.

[0006] In one specific embodiment, the radial cross-sectional dimension of the fastener is larger than the radial cross-sectional dimension of the dust cover.

[0007] In one specific embodiment, the valve component includes: a stem portion and a bottom portion, the fastener is sleeved on the stem portion, the air intake port is opened on the bottom portion, and the dust cover is sleeved on the bottom portion.

[0008] The beneficial effects of this utility model are:

[0009] Compared with the prior art, the valve assembly proposed in this embodiment allows maintenance personnel to disassemble the fasteners without removing the dust cover, simplifying the disassembly steps, shortening the disassembly time, and improving the efficiency of valve assembly disassembly.

[0010] Secondly, embodiments of the present invention also provide a tire pressure sensor, comprising: a housing assembly, a tire pressure detection assembly, and at least one valve assembly as described above, wherein the housing assembly has a receiving space, the tire pressure detection assembly is assembled in the receiving space, and the valve assembly is connected to the side of the housing assembly.

[0011] In one specific embodiment, the tire pressure detection component includes: an electronic control board, an onboard antenna, and a power supply. The electronic control board and the onboard antenna are both electrically connected to the power supply. The onboard antenna is vertically connected to the electronic control board, and the onboard antenna and the power supply are symmetrically arranged about the central axis of the accommodating space.

[0012] In one specific embodiment, the housing assembly includes an upper shell and a bottom cover, the upper shell covering the bottom cover to form the receiving space, and the power supply and the onboard antenna being symmetrically arranged along the length direction of the bottom cover.

[0013] In one specific embodiment, the tire pressure sensor further includes: a fixing screw, the upper housing is provided with an adjustment groove, and one end of the fixing screw passes through the adjustment groove and is connected to the valve component.

[0014] In one specific embodiment, the fixing screw includes a screw head and a screw post, the screw post passing through the adjustment groove and connected to the valve component, and the screw head having at least one anti-slip strip on its side near the screw post, the anti-slip strip abutting against the upper shell when the valve component is connected to the housing component.

[0015] In one specific embodiment, the onboard antenna includes: a substrate and a radiating element, the radiating element being attached to the substrate, the radiating element including a plurality of radiating patches, the plurality of radiating patches being electrically connected to each other and arranged around the periphery of the substrate.

[0016] In one specific embodiment, the bottom of the substrate is provided with a first connecting portion, the substrate is provided with a first opening corresponding to the position of the first connecting portion, the first connecting portion is inserted into the first opening, and the radiating patch extends to the first connecting portion.

[0017] The beneficial effects of this utility model are:

[0018] Compared with the prior art, the tire pressure sensor proposed in this utility model has a gap fit between the fasteners of the valve assembly and the dust cover, which simplifies the disassembly steps. Maintenance personnel can disassemble the fasteners without removing the dust cover, which shortens the disassembly time of the tire pressure sensor and improves work efficiency.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a valve assembly according to an embodiment of the present invention;

[0021] Figure 2 This is a front view structural diagram of a valve assembly according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of a valve assembly separation structure proposed in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the overall structure of a tire pressure sensor according to an embodiment of the present invention;

[0024] Figure 5 This is a cross-sectional structural diagram of a tire pressure sensor according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of a tire pressure sensor with a separate valve assembly, housing assembly, and fixing screws, according to an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the overall structure of the tire pressure detection component in a tire pressure sensor according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the overall structure of the onboard antenna in a tire pressure sensor according to an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram illustrating the connection between the onboard antenna and the electronic control board in a tire pressure sensor according to an embodiment of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Tire pressure sensor; 10. Valve assembly; 11. Valve piece; 111. Intake port; 112. Exit port; 113. Stem; 114. Bottom; 115. Third connecting part; 12. Fastener; 13. Dust cover; 20. Housing assembly; 21. Upper housing; 211. Adjustment groove; 212. Through hole; 213. Connecting cavity; 214. Protective groove; 22. Accommodation space; 23. Bottom cover; 30. Tire pressure detection assembly; 31. Electronic control board; 311. First opening; 312. Second opening; 32. Onboard antenna; 321. Substrate; 3211. First connecting part; 3212. Second connecting part; 322. Radiating element; 3221. Radiating patch; 323. Radiating part; 3231. First inclined surface; 3232. Transition surface; 3233. Second inclined surface; 33. Power supply; 34. Detection element; 40. Fixing screw; 41. Screw head; 42. Screw post; 43. Anti-slip strip; 44. Fitting part; 441. Limiting surface. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification. Example

[0038] Firstly, please refer to Figures 1 to 3 This utility model embodiment proposes a valve assembly 10, fixed to a wheel rim. The valve assembly 10 includes: a valve member 11, which includes an air outlet 112 and an air inlet 111, the air outlet 112 being located in the deformation space formed by the wheel rim and the tire; a fastener 12, which is sleeved on the valve member 11 such that the valve member 11 is fixed to the wheel rim; and a dust cover 13, which is sleeved on the air inlet 111. The fastener 12 and the dust cover 13 are clearance-fitted.

[0039] In practical applications, the fastener 12 is sleeved on the outside of the valve component 11 and tightly fitted with the wheel rim, generating friction to fix the valve component 11 to the wheel rim, ensuring that the valve assembly 10 will not loosen during tire rolling. The protective sleeve and the fastener 12 adopt a clearance fit, which can be easily removed when disassembling the valve assembly 10, improving the convenience of removing the valve assembly 10 from the wheel rim. When the valve assembly 10 proposed in this embodiment is removed from the wheel rim, it is only necessary to remove the fastener 12 directly to complete the disassembly of the valve assembly 10, without having to remove the dust cover 13 first and then the fastening nut as in the traditional method, saving time and effort.

[0040] The valve assembly 10 proposed in this embodiment allows maintenance personnel to disassemble the fastener 12 without removing the dust cover 13, which simplifies the disassembly steps of the valve assembly 10, shortens the disassembly time of the valve assembly 10, and improves the working efficiency of the valve assembly 10 disassembly.

[0041] Please see Figure 2 The radial cross-sectional dimension of fastener 12 is larger than that of dust cover 13.

[0042] Specifically, the radial cross-sectional dimension of the fastener 12 is increased so that while fastening the valve assembly 11, it can prevent external debris from entering the rim through the gap between the rod 113 and the rim. At the same time, the larger the radial cross-sectional dimension of the fastener 12, the larger the contact area between the fastener 12 and the rim, and the stronger the fastening force, thereby ensuring that the valve assembly 10 will not loosen during tire rolling. Furthermore, the radial cross-sectional dimension of the fastener 12 is larger than that of the dust cover 13, so maintenance personnel can disassemble the fastener 12 without removing the dust cover 13, simplifying the disassembly steps of the valve assembly 10 and improving maintenance efficiency.

[0043] Please see Figure 3 The valve component 11 includes: a stem portion 113 and a bottom portion 114, a fastener 12 sleeved on the stem portion 113, an air intake port 111 opened on the bottom portion 114, and a dust cover 13 sleeved on the bottom portion 114.

[0044] Specifically, fastener 12 is fitted onto the stem 113 of valve member 11. Through the cooperation between fastener 12 and the rim, friction is generated, firmly fixing valve member 11 onto the rim and ensuring that valve assembly 10 does not loosen during tire rolling. Dust cover 13 is fitted onto the bottom 114 of valve member 11, covering air intake 111 to prevent dust, moisture, and other debris from entering air intake 111 and thus preventing air intake 111 from becoming clogged.

[0045] Compared with the prior art, the valve assembly 10 proposed in this embodiment simplifies the disassembly steps. Maintenance personnel can disassemble the fastener 12 without removing the dust cover 13, which shortens the disassembly time of the valve assembly 10 and improves the efficiency of maintenance work.

[0046] Secondly, please refer to Figures 4 to 9 This utility model embodiment also proposes a tire pressure sensor 100, including: a housing assembly 20, a tire pressure detection assembly 30 and at least one valve assembly 10 as described above. The housing assembly 20 is provided with a receiving space 22, the tire pressure detection assembly 30 is assembled in the receiving space 22, and the valve assembly 10 is connected to the side of the housing assembly 20.

[0047] It should be noted that the upper shell 21 of the housing assembly 20 is provided with a through hole 212 corresponding to the detection element 34. When the tire pressure sensor 100 is applied in the tire, the gas inside the tire comes into contact with the detection element 34 through the through hole 212, and the air pressure and temperature inside the tire are measured at the same time.

[0048] In practical applications, the valve assembly 10 is connected to the side of the housing assembly 20. Since the valve piece 11 is connected to the rim by the fastener 12, and the fastener 12 of the valve assembly 10 is clearance-fitted with the dust cover 13, the disassembly steps of the tire pressure sensor 100 from the rim proposed in this embodiment are simplified from removing the dust cover 13 → fastener 12 → pulling out the tire pressure sensor 100 to rotating the fastener 12 → pulling out the tire pressure sensor 100, which simplifies the disassembly steps and shortens the operation time.

[0049] The tire pressure sensor 100 proposed in this embodiment has a clearance fit between the fastener 12 of the valve assembly 10 and the dust cover 13, which simplifies the disassembly steps. Maintenance personnel can disassemble the fastener 12 without removing the dust cover 13, which shortens the disassembly time of the tire pressure sensor 100 and improves work efficiency.

[0050] Please see Figure 5 and Figure 7 The tire pressure monitoring component 30 includes an electronic control board 31, an onboard antenna 32, and a power supply 33. The electronic control board 31 and the onboard antenna 32 are both electrically connected to the power supply 33. The onboard antenna 32 is vertically connected to the electronic control board 31. The onboard antenna 32 and the power supply 33 are symmetrically arranged about the central axis of the accommodating space 22.

[0051] Specifically, the onboard antenna 32 and power supply 33 are symmetrically arranged about the central axis of the housing space 22 (e.g., left-right or front-back symmetrical) to reduce internal redundant space. This also ensures uniform stress distribution on the housing assembly 20, preventing localized stress concentration that could lead to cracking or deformation, and extending the service life of the tire pressure sensor 100. The symmetrical arrangement of the onboard antenna 32 and power supply 33 avoids the scattered gaps of a distributed layout or the accumulated height of a stacked arrangement, making the tire pressure sensor 100 more flat and miniaturized.

[0052] Please refer to it again. Figure 5 and Figure 7 The housing assembly 20 includes an upper housing 21 and a bottom cover 23. The upper housing 21 covers the bottom cover 23 to form a receiving space 22. The power supply 33 and the onboard antenna 32 are symmetrically arranged along the length of the bottom cover 23.

[0053] Specifically, the upper shell 21 covers the bottom cover 23 to form a closed accommodating space 22. The power supply 33 and the onboard antenna 32 are symmetrically arranged along the length of the bottom cover 23 to reduce internal stress concentration and improve the deformation resistance of the shell assembly 20. The symmetrical arrangement of the power supply 33 and the onboard antenna 32 along the length of the bottom cover 23 ensures that their centers of mass are located on the central axis of the bottom cover 23. When the tire rotates, the centrifugal forces are opposite in direction and equal in magnitude, and the resultant torque approaches zero, thereby eliminating tire dynamic balance deviation and improving vehicle driving safety. At the same time, the accommodating space 22 within the shell assembly 20 is fully utilized to reduce the overall volume of the tire pressure sensor 100, thus miniaturizing the tire pressure sensor 100. The onboard antenna 32 is perpendicular to the electronic control board 31 (i.e., along the tire axial direction), so that the signal radiation direction is parallel to the tire rotation axis, reducing the reflection attenuation of electromagnetic waves by the metal wheel hub. The antenna and the power supply 33 are symmetrically distributed with maximum spacing between them, and the magnetic field direction of the power supply 33 is perpendicular to the antenna radiation direction, reducing coupling interference.

[0054] Please see Figure 5 The upper shell 21 is provided with a protective groove 214, and the onboard antenna 32 extends into the protective groove 214 of the upper shell 21, which reduces electromagnetic interference between the onboard antenna 32 and other electronic components on the electronic control board 31 and improves the stability of signal transmission.

[0055] Please see Figures 4 to 6 The tire pressure sensor 100 also includes: a fixing screw 40, an adjustment groove 211 provided on the upper housing 21, and one end of the fixing screw 40 passing through the adjustment groove 211 and connected to the valve component 11.

[0056] Specifically, the valve stem is connected to the housing assembly 20 via a fixing screw 40, facilitating the installation and removal of the tire pressure sensor 100 on the tire. An adjustment groove 211 is provided on the upper housing 21 to increase the lateral swing range of the fixing screw 40, thereby improving the adaptability of the tire pressure sensor 100 and making it suitable for various wheel rims. When the wheel rim angle is small, the valve stem moves downwards under the action of external force; when the wheel rim angle is large, the process is the opposite.

[0057] Please see Figure 4 and Figure 6 The fixing screw 40 includes a screw head 41 and a screw post 42. The screw post 42 passes through the adjustment groove 211 and is connected to the valve component 11. The screw head 41 is provided with at least one anti-slip strip 43 on the side near the screw post 42. When the valve component 10 is connected to the housing component 20, the anti-slip strip 43 abuts against the upper housing 21.

[0058] Specifically, by tightening the fixing screw 40, the anti-slip strip 43 is brought into close contact with the upper shell 21, generating static friction to prevent the screw from loosening during use and to ensure the connection stability between the valve assembly 10 and the housing assembly 20, thereby improving the stability of the tire pressure sensor 100 during tire operation.

[0059] Please see Figure 6 In this embodiment, the fixing screw 40 is provided with a fitting part 44 at the position corresponding to the adjustment groove 211. The fitting part 44 is fitted into the adjustment groove 211, and the width of the fitting part 44 is adapted to the width of the adjustment groove 211.

[0060] Specifically, at least one limiting surface 441 is provided on the periphery of the fitting part 44. The limiting surface 441 cooperates with the corresponding side wall of the adjusting groove 211 to limit the rotation of the fixing screw 40. In this embodiment, four limiting surfaces 441 are provided on the periphery of the fitting part 44. The width of the fitting part 44 is adapted to the width of the adjusting groove 211. When the fastener 12 passes through the adjusting groove 211 and connects to the valve stem, the fitting part 44 on the fastener 12 is fitted into the adjusting groove 211, and the limiting surface 441 abuts against the two side walls of the adjusting groove 211, thereby preventing the fastener 12 from rotating relative to the adjusting groove 211.

[0061] Please refer to it again. Figure 6 In this embodiment, the upper shell 21 is provided with a connecting cavity 213 on the side near the valve stem. The adjusting groove 211 communicates with the connecting cavity 213. The valve stem is provided with a third connecting part 115 at the position corresponding to the connecting cavity 213. The screw post 42 of the fixing screw 40 passes through the adjusting groove 211 and the connecting cavity 213, so that the third connecting part 115 is connected to the connecting cavity 213.

[0062] Specifically, the fixing screw 40 passes sequentially through the adjusting groove 211 and the connecting cavity 213 of the upper housing 21 and connects to the connector on the valve stem, forming a relatively locking mechanical structure. This ensures that the tire pressure sensor 100 can be stably installed on the tire, preventing the tire pressure sensor 100 from loosening or falling off due to factors such as vibration, centrifugal force, or tire deformation during vehicle operation. Simultaneously, the connecting cavity 213 provides a precise mating space for the connection between the fixing screw 40 and the third connecting part 115, ensuring that the fixing screw 40 can accurately connect with the third connecting part 115, achieving a secure connection between the housing assembly 20 and the valve stem.

[0063] In this embodiment, the inner wall of the connecting cavity 213 has the same curvature as the outer wall of the third connecting portion 115, making the stress distribution on the contact surface of the third connecting portion 115 and the connecting cavity 213 uniform. The stress generated when subjected to centrifugal force from tire rotation or vibration during vehicle operation can be uniformly transmitted to the entire contact surface, rather than concentrated in a local area, avoiding stress concentration and improving the connection stability between the valve and the housing assembly 20.

[0064] Please see Figure 8 The onboard antenna 32 includes a substrate 321 and a radiating element 322. The radiating element 322 is attached to the substrate 321. The radiating element 322 includes a plurality of radiating patches 3221. The plurality of radiating patches 3221 are electrically connected to each other and arranged around the periphery of the substrate 321.

[0065] Specifically, the on-board antenna 32 is based on the principle of wavelength shortening, which reduces the transmission speed of electromagnetic waves, concentrates the electric field at the interface between the radiating element 322 and the substrate 321, reduces edge radiation loss, improves radiation efficiency, increases energy distribution in space, and enhances the radiation efficiency of the on-board antenna 32. Furthermore, it is smaller in size than antennas with the same transmission power, achieving antenna miniaturization. Moreover, multiple radiating patches 3221, when electrically connected, can form a unified radiation system within the operating frequency band. When current flows through the radiating patches 3221, each patch generates electromagnetic radiation, resulting in a synergistic radiation effect within the operating frequency band. This causes electromagnetic waves to superimpose and interfere with each other in space, radiating outwards with specific directions and intensities, transmitting signals and maintaining stable antenna radiation performance. The patches are arranged along the edge of the substrate 321, increasing the transmitting area of ​​the on-board antenna 32 and exciting a ring-shaped surface current. The radiation fields superimpose in a direction perpendicular to the plane of the substrate 321, reducing signal loss and improving signal transmission quality.

[0066] Preferably, in this embodiment, the substrate 321 is made of PCB material. PCB material has a stable dielectric constant and low loss factor, which enables electromagnetic waves to propagate stably in the dielectric layer, reduces signal attenuation and distortion during transmission, and ensures the radiation efficiency and signal quality of the onboard antenna 32. At the same time, PCB material has high mechanical strength and rigidity, which can provide stable physical support for the radiating element 322, thereby ensuring the stability of the onboard antenna 32 in use. PCB material is easy to process and manufacture onboard antenna 32, reducing production costs.

[0067] Please refer to it again. Figure 8 and Figure 9 The bottom end of the substrate 321 is provided with a first connecting portion 3211, and the substrate 321 is provided with a first opening 311 corresponding to the position of the first connecting portion 3211. The first connecting portion 3211 is inserted into the first opening 311, and the radiating patch 3221 extends to the first connecting portion 3211.

[0068] Specifically, the first connecting portion 3211 at the bottom of the substrate 321 cooperates with the first opening 311 on the electronic control board 31 to achieve a stable connection between the onboard antenna 32 and the electronic control board 31, avoiding loosening or detachment of the connection due to vibration and other factors, thereby improving the working stability of the antenna. The radiating patch 3221 extends to the first connecting portion 3211, increasing the radiation frequency of the onboard antenna 32 in the case of limited space 22, so that the onboard antenna 32 of this embodiment can transmit stronger signals or achieve communication at a greater distance under the same power input.

[0069] Please refer to it again. Figure 8 and Figure 9 The bottom end of the substrate 321 is also provided with a second connecting part 3212. The electronic control board 31 is provided with a second opening 312 corresponding to the position of the second connecting part 3212. The second connecting part 3212 is inserted into the second opening 312. The insertion of the second connecting part 3212 into the second opening 312 and the insertion of the first connecting part 3211 into the first opening 311 cooperate with each other to realize the dual-point fixed connection between the onboard antenna 32 and the electronic control board 31, which further improves the connection stability between the onboard antenna 32 and the electronic control board 31.

[0070] Please refer to it again. Figure 8 and Figure 9In one embodiment, a second connecting portion 3212 is also provided on the other side of the bottom end of the substrate 321. The second connecting portions 3212 located on both sides of the substrate 321 are symmetrical about the first connecting portion 3211. A feed source (not shown in the figure) is mounted on the second connecting portion 3212 on one side of the bottom end of the substrate 321, and a ground electrode (not shown in the figure) is mounted on the second connecting portion 3212 on the other side of the bottom end of the substrate 321. By symmetrically arranging the feed source and the ground electrode on both sides of the substrate 321, interference and noise during signal transmission are reduced, and the stability and reliability of the signal are improved. This allows the onboard antenna 32 to reasonably arrange various components in the limited space 22, improving space utilization and making the onboard antenna 32 more compact.

[0071] Please see Figure 8 In one embodiment, the onboard antenna 32 includes a radiating portion 323, which includes a first inclined surface 3231, a transition surface 3232, and a second inclined surface 3233. The first inclined surface 3231, the transition surface 3232, and the second inclined surface 3233 are sequentially spliced ​​to form a transition portion. The first inclined surface 3231 is formed by extending upwardly at an angle from one side of the substrate 321, and the second inclined surface 3233 is formed by extending upwardly at an angle from the other side of the substrate 321.

[0072] Specifically, the first inclined surface 3231 and the second inclined surface 3233 are respectively formed by extending upwardly at an incline from both sides of the substrate 321. The first inclined surface 3231, the second inclined surface 3233, and the transition surface 3232 together constitute a radiating part 323 with a spatial three-dimensional structure. When current propagates on the radiating part 323, electromagnetic wave radiation in multiple directions is generated in space due to the different angles and directions of each surface. The electromagnetic waves from different surfaces superimpose and interfere with each other, expanding the signal coverage range and improving the communication stability between the tire pressure sensor 100 and the vehicle's receiving system. The transition surface 3232 is located between the first inclined surface 3231 and the second inclined surface 3233, playing a smooth connection role, reducing the reflection and scattering loss of electromagnetic waves during propagation, which is conducive to optimizing the performance parameters of the antenna and making the energy more concentrated in a specific direction, thereby improving the signal transmission quality of the onboard antenna 32.

[0073] Compared with the prior art, the tire pressure sensor 100 proposed in this utility model has a clearance fit between the fastener 12 of the valve assembly 10 and the dust cover 13, which simplifies the disassembly steps. Maintenance personnel can disassemble the fastener 12 without removing the dust cover 13, which shortens the disassembly time of the tire pressure sensor 100 and improves work efficiency.

[0074] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A valve assembly, fixed to a wheel rim, characterized in that, The valve assembly includes: A valve assembly, the valve assembly including an air outlet and an air inlet, the air outlet being located in the deformation space enclosed by the rim and the tire; Fastener, the fastener being fitted onto the valve such that the valve is fixed to the rim; A dust cover, which is fitted over the air inlet; The fastener and the dust cover are fitted with a clearance fit.

2. The valve assembly according to claim 1, characterized in that, The radial cross-sectional dimension of the fastener is larger than that of the dust cover.

3. The valve assembly according to claim 1, characterized in that, The valve component includes a stem and a bottom, the fastener is sleeved on the stem, the air intake is opened at the bottom, and the dust cover is sleeved on the bottom.

4. A tire pressure sensor, characterized in that, include: The housing assembly, the tire pressure monitoring assembly, and at least one valve assembly as described in any one of claims 1 to 3, wherein the housing assembly has a receiving space, the tire pressure monitoring assembly is mounted in the receiving space, and the valve assembly is connected to a side of the housing assembly.

5. The tire pressure sensor according to claim 4, characterized in that, The tire pressure monitoring component includes an electronic control board, an onboard antenna, and a power supply. The electronic control board and the onboard antenna are both electrically connected to the power supply. The onboard antenna is vertically connected to the electronic control board, and the onboard antenna and the power supply are symmetrically arranged about the central axis of the accommodating space.

6. The tire pressure sensor according to claim 5, characterized in that, The housing assembly includes an upper shell and a bottom cover, the upper shell covering the bottom cover to form the receiving space, and the power supply and the onboard antenna being symmetrically arranged along the length of the bottom cover.

7. The tire pressure sensor according to claim 6, characterized in that, The tire pressure sensor also includes a fixing screw, the upper housing is provided with an adjustment groove, and one end of the fixing screw passes through the adjustment groove and is connected to the valve component.

8. The tire pressure sensor according to claim 7, characterized in that, The fixing screw includes a screw head and a screw post. The screw post passes through the adjustment groove and is connected to the valve component. The screw head has at least one anti-slip strip on its side near the screw post. When the valve component is connected to the housing component, the anti-slip strip abuts against the upper housing.

9. The tire pressure sensor according to claim 5, characterized in that, The onboard antenna includes a substrate and a radiating element. The radiating element is attached to the substrate and includes multiple radiating patches. The multiple radiating patches are electrically connected to each other and arranged around the periphery of the substrate.

10. The tire pressure sensor according to claim 9, characterized in that, The substrate has a first connecting portion at its bottom end, and the substrate has a first opening at the position corresponding to the first connecting portion. The first connecting portion is inserted into the first opening, and the radiating patch extends to the first connecting portion.

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