An integrated hub-embedded tire pressure monitoring sensor structure

Abstract

The application provides a kind of integrated hub embedded tire pressure monitoring sensor structure, relating to the field of automobile tire pressure detection, including hub body, arc embedded groove is opened in the rim neutral layer position of hub body, arc embedded groove is in the same axis with spoke, the curvature of arc embedded groove is matched with the circumferential curvature of hub body;Protective cover plate is sealed and covered at the slot opening of arc embedded groove;Integrated sensing module includes arc-shaped packaging shell, pressure sensing unit, signal processing circuit and radio frequency antenna;Arc-shaped packaging shell is conformal and is attached with arc-shaped embedded groove, and integrated sensing module is completely embedded in the inside of arc-shaped embedded groove;Avoid the stress concentration problem caused by slot right-angle transition, arc-shaped groove body and round corner structure can effectively disperse the hoop tensile force and radial bending stress of rim and spoke;Solve the problem that existing installation groove is mostly straight groove and rectangular groove structure, and stress concentration is easily generated when hub is stressed.

Description

Technical Field

[0001] This invention relates to the field of automotive tire pressure monitoring technology, and in particular to an integrated wheel hub embedded tire pressure monitoring sensor structure. Background Technology

[0002] Tire pressure monitoring systems are core onboard electronic devices that ensure vehicle driving safety. They can collect key parameters such as tire pressure and temperature in real time, provide early warnings of abnormal tire pressure, and effectively avoid safety accidents such as tire blowouts and uneven tire wear. They have now become standard safety features in passenger cars and commercial vehicles. When tire pressure monitoring sensors are actually installed on vehicles, in order to avoid them from protruding and falling off due to impacts, and to take into account the dynamic balance of the wheel hub and the overall appearance, the industry generally adopts a solution of pre-fabricating installation grooves on the inner side of the wheel spokes or rims, and embedding the sensor module into the grooves to achieve a hidden installation.

[0003] For example, existing application number CN202210073454.6 discloses a tire pressure sensor and its tire pressure monitoring method, including a valve stem with a retaining ring at its end; a monitoring shell, which is detachably mounted on the valve stem via an installation component; a monitoring mechanism, which is installed inside the monitoring shell to monitor tire pressure; the installation component includes an inner sleeve, an outer sleeve, and a bottom sleeve; a locking block, which is mounted on the inner sleeve and engages with the retaining ring; the monitoring shell is installed between the inner sleeve and the outer sleeve; the inner sleeve is mounted on the valve stem via the engagement of the locking block and the retaining ring; the outer sleeve and the bottom sleeve are connected by a threaded connection to fix the locking block; the inner sleeve is initially installed on the valve stem by the engagement of the locking block and the retaining ring; the bottom end and outer side of the locking block are simultaneously engaged with the top surface of the locking block and the inner wall of the outer sleeve by the mutual engagement of the bottom sleeve and the outer sleeve, and the monitoring shell is fixed between the outer sleeve and the inner sleeve, thereby preventing the monitoring shell from falling off the valve stem.

[0004] However, existing installation grooves are mostly straight or rectangular, with right-angle transitions between the groove opening and the groove wall. When the wheel hub is under stress, stress concentration is easily generated. This not only weakens the circumferential tensile and radial bending resistance of the rim and spokes, but also causes fatigue cracks to easily develop at stress concentration points under high-speed, bumpy, and heavy-load conditions, even leading to local cracking and structural failure, posing a driving safety hazard. Furthermore, after the sensor module is embedded in the groove, the sensor module is directly exposed inside the groove cavity. During tire removal and installation, the tire bead of the tire changer and the removal and installation tools can easily scratch, squeeze, and impact the sensor. This can cause minor scratches on the outer shell and damage to the sealant layer, or even lead to cracking of the encapsulation, breakage of the circuit board, and desoldering failure of components, increasing after-sales maintenance costs and vehicle failure rate. Summary of the Invention

[0005] In view of this, the present invention provides an integrated wheel hub embedded tire pressure monitoring sensor structure, which adopts an optimized structure with an arc-shaped embedding groove and rounded inner wall transition. The arc-shaped embedding groove is opened at the neutral layer of the wheel hub rim, and the groove depth is controlled within half the wheel hub wall thickness and does not penetrate the wheel hub body. This effectively avoids the stress concentration problem caused by the right angle transition of the groove. When the vehicle is subjected to alternating stress under conditions such as high speed, bumps, and heavy load, the arc-shaped groove and rounded corner structure can effectively disperse the circumferential tensile force and radial bending force of the wheel rim and spokes. Stress is minimized, eliminating the risk of fatigue cracks, localized cracking, and even structural failure at stress concentration points. The original mechanical properties of the wheel hub are preserved, ensuring the structural safety of the entire vehicle. This design is particularly suitable for the harsh operating conditions of commercial vehicles, including heavy loads and prolonged bumpy rides, extending the overall service life of the wheel hub. A double-layer protective structure is adopted, featuring a fully embedded integrated sensor module and a sealed protective cover. The protective cover is flush with the outer wall of the wheel hub, forming a rigid protective barrier. This overcomes the drawback of traditional sensor modules being directly exposed and embedded in grooves. During tire installation and removal, the wheel hub can be easily accessed. The tire bead and disassembly tools only come into contact with the protective cover, completely avoiding scratches, squeezing, and impact damage to the sensor module. This fundamentally solves problems such as scratches on the outer shell, damage to the sealant layer, cracking of the encapsulation, breakage of the circuit board, and desoldering of components, significantly reducing the failure rate of vehicle installation and after-sales maintenance costs. At the same time, the flush-mount design without any protrusions can prevent the sensor from falling off or being damaged by flying stones or road debris during driving, improving the structural stability during driving. During use, a dual sealing structure of mechanical seal and potting compound seal can effectively prevent impurities such as mud, water, salt spray, high-temperature water vapor, and oil from entering the sensor module cavity, avoiding circuit corrosion due to moisture and component aging failure, and withstanding the high-temperature radiation of the braking system and the corrosion of harsh road conditions such as salt, alkali, and mud. The radio frequency antenna adopts a flexible arc design, which is laid out close to the inner wall of the encapsulation shell, and the antenna impedance is precisely matched with the radio frequency output end, weakening the metal shielding effect of the wheel hub, improving the stability of radio frequency signal transmission, and ensuring that tire pressure and tire temperature data are transmitted to the vehicle receiver in real time and stably, with no delay in warning response.

[0006] This invention provides an integrated wheel hub embedded tire pressure monitoring sensor structure, specifically including: a wheel hub body, an arc-shaped embedding groove, a protective cover plate, and an integrated sensing module. The outer side of the wheel hub body is fixedly connected to a rim via multiple spokes; the multiple spokes are arranged circumferentially with the wheel hub body, and both ends of the spokes are fixedly connected to the wheel hub body and the rim respectively; the arc-shaped embedding groove is formed at the neutral layer of the rim of the wheel hub body, the arc-shaped embedding groove and the spokes are on the same axis, and the curvature of the arc-shaped embedding groove matches the circumferential curvature of the wheel hub body; The protective cover seals over the opening of the arc-shaped embedded groove, and the surface of the protective cover is flush with the outer wall of the wheel hub body; the integrated sensing module includes an arc-shaped encapsulation shell, a pressure sensing unit, a signal processing circuit, and a radio frequency antenna, which are integrated and encapsulated within the arc-shaped encapsulation shell; the arc-shaped encapsulation shell and the arc-shaped embedded groove are arranged in a conformal fit, and the integrated sensing module is completely embedded inside the arc-shaped embedded groove; a partially sealed cavity is formed between the protective cover, the arc-shaped encapsulation shell, and the arc-shaped embedded groove.

[0007] Furthermore, the signal processing circuit is electrically connected to the pressure sensing unit and the radio frequency antenna to achieve passive acquisition and low-energy monitoring of tire pressure and temperature. The center of mass of the integrated sensing module is coaxially arranged with the rotation center of the wheel hub body to eliminate dynamic balance interference.

[0008] Furthermore, the pressure sensing unit adopts a MEMS pressure-sensitive chip and integrates a temperature compensation module. A micro pressure guiding hole is opened at the pressure sensing unit position corresponding to the arc-shaped encapsulation shell. The micro pressure guiding hole is equipped with a waterproof and breathable membrane to block water vapor and impurities. The arc-shaped encapsulation shell is made of a lightweight alloy of the same material as the wheel hub body, and the wall thickness of the arc-shaped encapsulation shell is uniform, with an overall weight of no more than 5 grams.

[0009] Furthermore, the signal processing circuit includes a signal processing module, a microcontroller, an ADC conversion module, and a power management module. The power management module adopts a sleep-wake mechanism, and its static operating current is in the microampere range. In passive mode, it integrates an electric vibration energy acquisition unit to convert the mechanical energy of the wheel into working electrical energy.

[0010] Furthermore, the radio frequency antenna is a flexible arc-shaped antenna, which is arranged to fit the inner wall of the arc-shaped encapsulation housing. The antenna impedance is matched with the impedance of the radio frequency output terminal of the signal processing circuit, which weakens the metal shielding effect of the wheel hub body and improves the stability of radio frequency signal transmission.

[0011] Furthermore, the wheel hub body is provided with counterweights of equal mass at symmetrical positions around the arc-shaped embedded groove to achieve circumferential mass balance, eliminating the need for additional dynamic balancing blocks.

[0012] Furthermore, the arc-shaped embedding groove is a closed shallow groove with a depth not exceeding half the thickness of the wheel hub body wall and does not penetrate the wheel hub body. The inner wall of the arc-shaped embedding groove adopts a rounded corner transition structure to avoid stress concentration.

[0013] Furthermore, the protective cover is an arc-shaped thin plate structure, and the material is the same as that of the wheel hub body; the arc-shaped embedded groove has an assembly support groove that matches the protective cover; the joint surface between the protective cover and the assembly support groove is provided with a sealing ring, and the joint is filled with high-temperature resistant silicone potting compound to form a double sealing structure to ensure no leakage under high temperature and salt spray conditions.

[0014] Furthermore, the bottom edge of the protective cover is evenly arranged and fixedly connected with multiple positioning buckles; the groove of the assembly support slot is provided with a snap-fit ​​groove that matches the positioning buckles.

[0015] Furthermore, the wheel hub body, the arc-shaped embedding groove, the protective cover plate, and the integrated sensing module are included. The outer side of the wheel hub body is fixedly connected to the rim via multiple spokes. The multiple spokes are arranged circumferentially with the wheel hub body, and both ends of the spokes are fixedly connected to the wheel hub body and the rim, respectively. The arc-shaped embedding groove is located at the neutral layer of the rim of the wheel hub body, and the arc-shaped embedding groove is on the same axis as the spokes. The curvature of the arc-shaped embedding groove matches the circumferential curvature of the wheel hub body. The protective cover plate seals and covers the opening of the arc-shaped embedding groove, and the surface of the protective cover plate is flush with the outer wall of the wheel hub body. The integrated sensing module includes an arc-shaped encapsulation shell, a pressure sensing unit, a signal processing circuit, and a radio frequency antenna. The pressure sensing unit, the signal processing circuit, and the radio frequency antenna are integrated and encapsulated within the arc-shaped encapsulation shell. The arc-shaped encapsulation shell and the arc-shaped embedding groove are arranged in a conformal fit, and the integrated sensing module is completely embedded inside the arc-shaped embedding groove. A partially sealed cavity is formed between the protective cover plate, the arc-shaped encapsulation shell, and the arc-shaped embedding groove.

[0016] Beneficial effects This invention employs an optimized structure with an arc-shaped embedding groove and rounded inner wall transitions. The arc-shaped embedding groove is located at the neutral layer of the wheel hub rim, and its depth is controlled within half the wheel hub wall thickness without penetrating the wheel hub body. This effectively avoids the stress concentration problem caused by the right-angle transition of the groove opening. When the vehicle is subjected to alternating stress under conditions such as high speed, bumps, and heavy loads, the arc-shaped groove and rounded corner structure can effectively disperse the circumferential tensile force and radial bending stress of the wheel rim and spokes, eliminating the risk of fatigue cracks, local cracking, or even structural failure at stress concentration points. It preserves the original mechanical properties of the wheel hub body, ensuring the structural safety of the entire vehicle during operation. It is especially suitable for the harsh usage scenarios of commercial vehicles with heavy loads and long-term bumps, extending the overall service life of the wheel hub.

[0017] This invention employs a double-layer protective structure with an integrated sensor module fully embedded and a protective cover for sealing. The protective cover is flush with the outer wall of the wheel hub, forming a rigid protective barrier. This overcomes the drawback of traditional sensor modules being directly exposed and embedded in the groove. During tire removal and installation, the tire bead of the tire changer and the removal tools only come into contact with the protective cover, completely avoiding scratches, squeezing, and impact damage to the sensor module. This fundamentally solves problems such as scratches on the outer shell, damage to the sealant layer, cracking of the encapsulation, breakage of the circuit board, and desoldering of components, significantly reducing the vehicle failure rate and after-sales maintenance costs. At the same time, the flush, non-protruding design can prevent the sensor from falling off or being damaged by flying stones or road debris during driving, improving the structural stability during driving.

[0018] This invention completely eliminates dynamic balance interference caused by sensor installation through a triple dynamic balance optimization design: First, the integrated sensing module adopts an arc-shaped encapsulation shell that conforms to the arc-shaped embedding groove, ensuring precise coaxiality between the module's center of mass and the wheel hub's rotation center; second, the sensing module uses a lightweight homogeneous alloy material, with its overall weight strictly controlled to within 5 grams, reducing the counterweight load; third, equal-mass counterweights are set at symmetrical positions around the arc-shaped embedding groove to achieve balanced mass around the wheel hub. During vehicle assembly, no additional dynamic balance blocks are required, and repeated dynamic balance adjustments are unnecessary; the vehicle can be used directly after tire installation, ensuring vehicle stability at high speeds and avoiding problems such as steering wheel vibration, uneven tire wear, and increased fuel consumption caused by dynamic imbalance, thus balancing driving comfort and tire lifespan.

[0019] This invention integrates a pressure sensing unit, signal processing circuit, and radio frequency antenna into an arc-shaped housing, achieving a modular and integrated design. This reduces connection failures of scattered components and improves the overall structural compactness. The pressure sensing unit is equipped with a MEMS pressure-sensitive chip and a temperature compensation module, ensuring the accuracy of tire pressure and temperature detection while eliminating temperature drift errors, making it suitable for accurate detection under high and low temperature conditions. The signal processing circuit adopts a sleep-wake mechanism, reducing the static operating current to the microampere level. In passive mode, it integrates an electro-vibration energy harvesting unit, which can convert the mechanical energy of wheel rotation into working electrical energy, achieving self-powered or low-energy-consumption driving range. This eliminates the need for regular battery replacements, significantly reducing subsequent maintenance costs and meeting the long-term maintenance-free use requirements of vehicle electronic devices.

[0020] This invention forms a dual-sealing structure of mechanical seal and potting compound seal during use, which can effectively prevent impurities such as mud, salt spray, high-temperature water vapor, and oil from entering the sensing module cavity, avoiding circuit corrosion due to moisture and component aging failure, and withstanding the high-temperature radiation of the braking system and the erosion of harsh road conditions such as salt, alkali and mud. The radio frequency antenna adopts a flexible arc design and is arranged to fit the inner wall of the encapsulation shell. The antenna impedance is precisely matched with the radio frequency output terminal, weakening the metal shielding effect of the wheel hub, improving the stability of radio frequency signal transmission, and ensuring that tire pressure and tire temperature data are transmitted to the vehicle receiver in real time and stably, with no delay in warning response.

[0021] In use, the protective cover adopts a snap-locking structure that combines a positioning buckle with a wheel hub locking groove. With the sliding and guiding action of the assisting inclined surface and the force-bearing inclined surface, the protective cover can be quickly pressed down and locked in place without the need for complex processes such as bolt tightening and welding, which greatly improves the efficiency of wheel hub prefabrication and vehicle assembly. During later maintenance, the protective cover can be removed simply by prying the positioning buckle with a special tool, without damaging the wheel hub body and the sensing module. This enables modular maintenance and replacement of the sensing module, reduces the difficulty of after-sales maintenance, and balances mass production efficiency with the convenience of later maintenance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0023] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0024] In the attached diagram: Figure 1 This is a schematic diagram of the integrated sensing module system of the present invention.

[0025] Figure 2 This is a schematic diagram of the pressure sensing unit system of the present invention.

[0026] Figure 3 This is a schematic diagram of the signal processing circuit system of the present invention.

[0027] Figure 4 This is a schematic diagram of the installation structure of the counterweight block and the wheel hub body of the present invention.

[0028] Figure 5 This is a schematic diagram of the installation structure of the protective cover plate and the wheel hub body of the present invention.

[0029] Figure 6 This is a schematic diagram of the arc-shaped encapsulation shell and the arc-shaped embedding groove installation structure of the present invention.

[0030] Figure 7 This is a schematic diagram of the arc-shaped embedding groove and the assembly support groove of the present invention.

[0031] Figure 8 This is the invention Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0032] Figure 9 This is a schematic diagram of the connection structure between the positioning buckle and the protective cover plate of the present invention.

[0033] Figure 10 This is the invention Figure 9 A magnified schematic diagram of the structure at point B in the middle.

[0034] List of reference numerals 1. Hub body; 101. Rim; 102. Spoke; 2. Arc-shaped embedding groove; 201. Assembly support groove; 202. Snap-fit ​​groove; 203. Assist slope; 3. Protective cover plate; 301. Sealing ring; 302. Positioning buckle; 303. Positioning block; 304. Force-bearing slope; 4. Integrated sensing module; 401. Arc-shaped encapsulation shell; 402. Pressure sensing unit; 403. Signal processing circuit; 404. RF antenna; 4021. Temperature compensation module; 4022. MEMS pressure-sensitive chip; 4031. Signal processing module; 4032. Microcontroller; 4033. ADC conversion module; 4034. Power management module; 5. Counterweight. Detailed Implementation

[0035] Example 1: Please refer to Figures 1 to 5 As shown: This invention provides an integrated wheel hub embedded tire pressure monitoring sensor structure, including a wheel hub body 1, an arc-shaped embedding groove 2, a protective cover plate 3, and an integrated sensing module 4. A wheel rim 101 is fixedly connected to the outer side of the wheel hub body 1 via multiple spokes 102. The multiple spokes 102 are arranged circumferentially with the wheel hub body 1, and both ends of the spokes 102 are fixedly connected to the wheel hub body 1 and the wheel rim 101, respectively. The arc-shaped embedding groove 2 is located at the neutral layer of the wheel rim 101 of the wheel hub body 1. The arc-shaped embedding groove 2 and the spokes 102 are on the same axis, and the curvature of the arc-shaped embedding groove 2 matches the circumferential curvature of the wheel hub body 1. The protective cover plate 3 provides a seal. The protective cover 3 covers the opening of the arc-shaped embedded groove 2, and its surface is flush with the outer wall of the wheel hub body 1. The integrated sensing module 4 includes an arc-shaped encapsulation housing 401, a pressure sensing unit 402, a signal processing circuit 403, and a radio frequency antenna 404. The pressure sensing unit 402, the signal processing circuit 403, and the radio frequency antenna 404 are integrated and encapsulated in the arc-shaped encapsulation housing 401. The arc-shaped encapsulation housing 401 and the arc-shaped embedded groove 2 are arranged in a conformal fit, and the integrated sensing module 4 is completely embedded inside the arc-shaped embedded groove 2. A partially sealed cavity is formed between the protective cover 3, the arc-shaped encapsulation housing 401, and the arc-shaped embedded groove 2.

[0036] The signal processing circuit 403 is electrically connected to the pressure sensing unit 402 and the radio frequency antenna 404 to realize passive acquisition and low-energy monitoring of tire pressure and temperature. The center of mass of the integrated sensing module 4 is coaxially arranged with the rotation center of the wheel hub body 1 to eliminate dynamic balance interference.

[0037] The pressure sensing unit 402 uses a MEMS pressure-sensitive chip 4022 and integrates a temperature compensation module 4021. A micro pressure guiding hole is opened at the position of the pressure sensing unit 402 corresponding to the arc-shaped encapsulation shell 401. The micro pressure guiding hole is equipped with a waterproof and breathable membrane to block water vapor and impurities. The arc-shaped encapsulation shell 401 is made of the same lightweight alloy as the wheel hub body 1, and the wall thickness of the arc-shaped encapsulation shell 401 is uniform, with an overall weight of no more than 5 grams.

[0038] The signal processing circuit 403 includes a signal processing module 4031, a microcontroller 4032, an ADC conversion module 4033, and a power management module 4034. The power management module 4034 adopts a sleep-wake mechanism and has a static operating current in the microampere range. In passive mode, it integrates an electric vibration energy acquisition unit to convert the mechanical energy of the wheel into working electrical energy.

[0039] Among them, the radio frequency antenna 404 is a flexible arc-shaped antenna, which is arranged in close fit to the inner wall of the arc-shaped encapsulation housing 401. The antenna impedance is matched with the impedance of the radio frequency output terminal of the signal processing circuit 403, which weakens the metal shielding effect of the hub body 1 and improves the stability of radio frequency signal transmission.

[0040] Among them, the wheel hub body 1 is symmetrically positioned around the arc-shaped embedded groove 2, and is equipped with a counterweight 5 of equal mass to achieve circumferential mass balance, eliminating the need for additional dynamic balancing blocks.

[0041] The specific usage and function of this embodiment are as follows: In the assembly stage of this invention, the integrated sensing module 4 is first pushed into the arc-shaped embedding groove 2 along its curvature. Automatic positioning is achieved by utilizing the conformal fitting characteristics of the arc surface, ensuring precise coaxiality between the module's center of mass and the wheel hub's rotation center. Subsequently, the protective cover plate 3 covers the groove opening and provides initial sealing and fixation, completing the pre-assembly of the wheel hub. No additional dynamic balancing is required during vehicle assembly; the tires can be directly assembled. When the vehicle is stationary, the power management module 4034 control circuit enters deep sleep mode, with static power consumption approaching zero, avoiding energy loss. After the vehicle starts moving, the vibration generated by the wheel rotation triggers the passive energy harvesting unit, converting mechanical energy... The circuit is converted into an electrical power supply circuit, or the low-power module is automatically woken up. The pressure sensing unit 402 collects the tire cavity air pressure in real time through the micro pressure guide hole. The MEMS pressure-sensitive chip 4022 converts the air pressure signal into an analog electrical signal. In conjunction with the temperature compensation module 4021, it eliminates temperature drift error and improves detection accuracy. After the analog electrical signal is amplified and filtered by the signal processing module 4031 and digitally processed by the ADC conversion module 4033, it is encoded and packaged by the microcontroller 4032 and transmitted to the vehicle receiver through the flexible radio frequency antenna 404 to realize the real-time transmission and abnormal warning of tire pressure and temperature data. This embodiment completely eliminates dynamic balance interference and ensures high-speed driving stability through the triple design of neutral layer slotting, coaxial center of mass layout and symmetrical counterweight. The fully embedded structure has no protruding parts, which not only avoids stone splashes and bumps during driving, but also achieves basic waterproof and dustproof through local sealed cavity, which is suitable for long-term tire pressure monitoring needs under normal road conditions. The integrated design eliminates the need for regular battery replacement and reduces later maintenance costs.

[0042] Example 2: like Figures 4 to 10 As shown: Based on Embodiment 1, it also includes Among them, the arc-shaped embedding groove 2 is a closed shallow groove with a depth not exceeding half of the wall thickness of the wheel hub body 1 and does not penetrate the wheel hub body 1. The inner wall of the arc-shaped embedding groove 2 adopts a rounded corner transition structure to avoid stress concentration.

[0043] Among them, the protective cover plate 3 is an arc-shaped thin plate structure, and the material is the same as that of the wheel hub body 1; the arc-shaped embedded groove 2 has an assembly support groove 201 that is compatible with the protective cover plate 3; the mating surface of the protective cover plate 3 and the assembly support groove 201 is provided with a sealing ring 301, and the joint is filled with high-temperature resistant organic silicone potting compound to form a double sealing structure to ensure no leakage under high temperature and salt spray conditions.

[0044] Among them, the bottom edge of the protective cover plate 3 is evenly arranged and fixedly connected with multiple positioning buckles 302; the groove of the assembly support groove 201 is provided with a snap-fit ​​groove 202 that is compatible with the positioning buckles 302.

[0045] The bottom end face of the positioning buckle 302 is fixedly connected to the positioning block 303; the outer end of the positioning block 303 is provided with a force-bearing inclined surface 304; the slot of the snap-fit ​​groove 202 is provided with an assisting inclined surface 203 that is compatible with the force-bearing inclined surface 304; both the assisting inclined surface 203 and the force-bearing inclined surface 304 are sloping structures with the same slope.

[0046] The specific usage and function of this embodiment are as follows: This embodiment optimizes structural strength and protective performance based on the basic design, adapting to harsh working conditions such as heavy loads, bumpy roads, and saline-alkali land. During the assembly stage, after embedding the integrated sensing module 4 into the arc-shaped embedding groove 2, the protective cover 3 is held and pressed down on the assembly support groove 201. The force-bearing inclined surface 304 at the bottom of the positioning buckle 302 and the assisting inclined surface 203 of the locking groove 202 slide against each other, guiding the positioning block 303 to smoothly engage into the locking groove 202, achieving a quick snap-locking action without the need for complex fixing processes such as bolts and welding, thus improving assembly efficiency. The sealing ring 301 and the potting compound form a double sealing barrier, completely preventing mud, water, salt spray, and high-temperature moisture from entering the sealed cavity, avoiding circuit corrosion due to moisture and component aging failure, and withstanding the high-temperature radiation of the braking system and the erosion of harsh road environments. During vehicle operation, the rounded transition structure of the arc-shaped embedding groove 2 disperses the alternating stress of the wheel hub, preventing stress concentration cracking at the groove opening. The shallow groove non-penetrating design preserves the structural strength of the wheel hub body 1 while taking into account the mechanical stability under heavy load and high-speed conditions. The protective cover plate 3 is flush with the outer wall of the wheel hub, forming a hard protective layer. When the tire is removed and installed, the tire bead of the tire changer and the removal and installation tools only come into contact with the protective cover plate 3, completely avoiding scratching, squeezing and impact on the integrated sensing module 4, preventing the package from cracking and the components from desoldering and failing. If later maintenance is required, the protective cover plate 3 can be removed by simply prying the positioning buckle 302 with a special tool, without damaging the wheel hub body 1 and the sensing module, realizing modular maintenance and replacement. This embodiment greatly improves the environmental adaptability, structural reliability and ease of disassembly and assembly of the sensor through quick-release buckles, double sealing and stress relief, extends the service life and reduces the failure rate under harsh conditions, while retaining the core advantages of dynamic balance zero interference and passive low power consumption, adapting to the needs of multiple scenarios such as commercial vehicles and high-performance passenger vehicles.

[0047] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0048] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0049] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An integrated wheel hub embedded tire pressure monitoring sensor structure, comprising a wheel hub body (1), an arc-shaped embedding groove (2), a protective cover plate (3), and an integrated sensing module (4), wherein a wheel rim (101) is fixedly connected to the outer side of the wheel hub body (1) through multiple spokes (102); the multiple spokes (102) are arranged circumferentially with the wheel hub body (1), and both ends of the spokes (102) are fixedly connected to the wheel hub body (1) and the wheel rim (101) respectively; characterized in that: The arc-shaped embedding groove (2) is located at the neutral layer of the rim (101) of the hub body (1). The arc-shaped embedding groove (2) and the spokes (102) are on the same axis, and the curvature of the arc-shaped embedding groove (2) matches the circumferential curvature of the hub body (1). The protective cover plate (3) seals and covers the opening of the arc-shaped embedding groove (2), and the surface of the protective cover plate (3) is flush with the outer wall of the hub body (1). The integrated sensing module (4) includes an arc-shaped encapsulation shell (401) and a pressure sensing unit (402). The signal processing circuit (403) and the radio frequency antenna (404), the pressure sensing unit (402), the signal processing circuit (403) and the radio frequency antenna (404) are integrated and packaged in an arc-shaped encapsulation housing (401); the arc-shaped encapsulation housing (401) and the arc-shaped embedding groove (2) are arranged in a conformal fit, and the integrated sensing module (4) is completely embedded in the arc-shaped embedding groove (2); a local sealed cavity is formed between the protective cover plate (3), the arc-shaped encapsulation housing (401) and the arc-shaped embedding groove (2).

2. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The signal processing circuit (403) is electrically connected to the pressure sensing unit (402) and the radio frequency antenna (404) to realize passive acquisition and low-energy monitoring of tire pressure and temperature. The center of mass of the integrated sensing module (4) is coaxially arranged with the rotation center of the wheel hub body (1).

3. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The pressure sensing unit (402) adopts a MEMS pressure-sensitive chip (4022) and integrates a temperature compensation module (4021). A micro pressure guiding hole is opened at the position of the pressure sensing unit (402) corresponding to the arc-shaped encapsulation shell (401). The micro pressure guiding hole is equipped with a waterproof and breathable membrane to block water vapor and impurities. The arc-shaped encapsulation shell (401) is made of the same lightweight alloy as the hub body (1), and the wall thickness of the arc-shaped encapsulation shell (401) is uniform, and the overall weight is no more than 5 grams.

4. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The signal processing circuit (403) includes a signal processing module (4031), a microcontroller (4032), an ADC conversion module (4033), and a power management module (4034). The power management module (4034) adopts a sleep-wake mechanism and has a static operating current of microamperes. In passive mode, it integrates an electric vibration energy acquisition unit.

5. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The radio frequency antenna (404) is a flexible arc-shaped antenna, which is attached to the inner wall of the arc-shaped encapsulation shell (401) and the antenna impedance is matched with the radio frequency output impedance of the signal processing circuit (403).

6. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The hub body (1) is provided with a counterweight (5) of equal mass at a circumferential position corresponding to the arc-shaped embedded groove (2).

7. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The arc-shaped embedding groove (2) is a closed shallow groove with a groove depth not exceeding half the wall thickness of the hub body (1) and not penetrating the hub body (1). The inner wall of the arc-shaped embedding groove (2) adopts a rounded corner transition structure.

8. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The protective cover (3) is an arc-shaped thin plate structure, and the material is the same as that of the wheel hub body (1); the arc-shaped embedded groove (2) has an assembly support groove (201) that is compatible with the protective cover (3); the joint surface of the protective cover (3) and the assembly support groove (201) is provided with a sealing ring (301).

9. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 1, characterized in that: The protective cover (3) has multiple positioning buckles (302) evenly arranged and fixedly connected at the bottom edge; the mounting support groove (201) has a snap-fit ​​groove (202) adapted to the positioning buckle (302) at the groove opening.

10. The integrated wheel hub embedded tire pressure monitoring sensor structure as described in claim 9, characterized in that: The bottom end face of the positioning buckle (302) is fixedly connected to a positioning block (303); the outer end of the positioning block (303) is provided with a force-bearing inclined surface (304); the slot of the snap-fit ​​groove (202) is provided with an assisting inclined surface (203) that is compatible with the force-bearing inclined surface (304); the assisting inclined surface (203) and the force-bearing inclined surface (304) are both sloping structures with the same slope.

Images