Wheel looseness detection device

Abstract

To provide a wheel looseness detection device which detects looseness of a fastening component of a wheel and further detects monitoring and detection of an engagement state of the wheel.SOLUTION: A wheel looseness detection device is installed in the wheel, and a fastening hole is provided in the wheel. A fastening component is provided to penetrate to the fastening hole, and is fixed thereto. The wheel looseness detection device 1 includes a washer 10, an outer shell, a looseness sensor module, and a power source component 40. The washer 10 has a through hole 11 and a fitting part 12, the fastening component is provided to penetrate to the through hole 11 and the washer 10 is fixed thereto, and the volume of the fastening component covers at least a partial range of the fitting part 12. The outer shell is fit to the fitting part 12, and is used to store the looseness sensor module. The looseness sensor module includes a pressure sensor 31. When the fastening component 3 is tightly fastened thereto and the surface of the wheel 2 is pressed, tight contact force is detected by the pressure sensor 31.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a detection device, and more particularly to a loose wheel detection device. [Background technology]

[0002] There are occasions when a vehicle wheel becomes loose while driving. When a wheel becomes loose, it can easily cause a dangerous situation while driving, and the detached tire can roll onto the roadway, causing serious harm to the driving safety of other vehicles and people. The overall structure of a vehicle tire and wheel includes the wheel that is attached to the vehicle hub and the tire that is located on the outside of the wheel. The wheel has multiple holes through which the hub fixing bolts pass, and furthermore, the wheel is fixed to the hub by a combination of multiple nuts and bolts.

[0003] Of these, commercial vehicles and large vehicles wear out their tires quickly due to frequent driving, and tires must be replaced regularly. In order to do so, it is necessary to disassemble the fixing structure (bolts and nuts) between the wheel and hub, which can cause damage to the threads of the bolts and nuts. In addition, exposure to wind, sunlight, rain, etc. can cause problems such as rust and embrittlement in the fixing structure between the wheel and hub, all of which are causes of wheel-off accidents. Summary of the Invention [Problem to be solved by the invention]

[0004] In the past, there was no device to accurately detect whether the fixing structure between the wheel and the hub was properly fastened, and the problem of the wheel loosening due to the insecure fastening of the wheel was always occurring. Therefore, the main object of the present invention is to provide a wheel loosening detection device to solve the above-mentioned problem. [Means for solving the problem]

[0005] The wheel slack detection device provided by the present invention is installed on a wheel, and the wheel is provided with a fastening hole. A fastening component is inserted and fixed into the fastening hole. The wheel slack detection device includes a washer, an outer shell, a slack sensor module, and a power supply component. The washer has a through hole and a fitting portion, and a fastening part is inserted into the through hole to fix the washer, and the volume of the fastening part covers at least a portion of the fitting portion. The shell includes an upper shell and a lower shell, the upper shell having an upper extension portion, and the lower shell having a lower extension portion. The upper extension portion and the lower extension portion are combined with each other and fitted and fixed to each other in the fitting portion. The loosening sensor module includes a pressure sensor disposed between the upper extension and the lower extension. When the fastening parts are tightly fastened and the surface of the wheel is pressed, the fastening force is detected by the pressure sensor. When the pressure sensor detects the loss of the fastening force, the loosening sensor module issues a warning signal. A power supply component is coupled to the loose sensor module and provides power to the loose sensor module.

[0006] As described above, the wheel loosening detection device of the present invention uses the loosening sensor module to accurately detect whether the fastening parts are correctly screwed and fixed, detect the screwing state of the wheel in real time, and achieve the purpose of preventing the wheel from loosening. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view showing the appearance of a wheel looseness detection device according to an embodiment of the present invention; [Diagram 2] 1 is an exploded perspective view of a wheel looseness detection device according to an embodiment of the present invention. [Diagram 3] 1 is a disassembled perspective view of a wheel looseness detection device according to an embodiment of the present invention, viewed obliquely from below. [Figure 4]FIG. 2 is a diagram showing a state in which the wheel looseness detection device according to the embodiment of the present invention is used, illustrating the position in which the wheel looseness detection device is installed on the wheel. [Diagram 5] 1 is a diagram showing a state in which the wheel looseness detection device according to the embodiment of the present invention is used, showing that the detection post is in a tightly packed state. [Figure 6] 1 is a diagram showing a state in which the wheel looseness detection device according to the embodiment of the present invention is used, showing that the detection post is in a loose state. [Figure 7] FIG. 2 is a block diagram showing the connections of a wheel looseness detection device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In order to explain the core idea expressed in the creative content of the present invention, specific embodiments are given below. It should be noted in advance that the proportions of each part shown in the embodiments are used for the purpose of explanation and are not drawn according to the actual proportions of the parts.

[0009] As shown in Figures 1 to 7, a wheel looseness detection device 1 according to an embodiment of the present invention is installed on a wheel 2 of a vehicle. The wheel 2 is provided with a fastening hole 2a, and a fastening component 3 is inserted and fixed through the fastening hole 2a. The wheel looseness detection device 1 includes a washer 10, a shell 20, a looseness sensor module 30, and a power supply component 40. The present invention further includes a circuit board 50, a signal transmission antenna 60, a position module 70, a state control module 80, a trigger control module 90, a light emitting module 100, a tire detection module 110, a temperature detection module 120, and a direction display component 130. In the embodiment of the present invention, the wheel looseness detection device 1 is installed on the spokes of the wheel 2.

[0010] As shown in Figures 3 to 6, the fastening part 3 includes a nut 3a and a bolt 3b. The wheel looseness detection device 1 of the present invention is installed on the fixed structure of the wheel and hub, and is particularly located between the nuts 3a on the surface of the wheel 2. The nuts 3a are generally threaded, and are rotated to screw together and fix with the bolts 3b, and are also tightly fitted on the surface of the wheel 2. Thus, when the nuts 3a rotate in the opposite direction and move away from the surface of the wheel 2, it indicates that the wheel 2 has become loose. The present invention detects whether the nut 3a is in close contact with the surface of the wheel 2, or whether the nut 3a is separated from the surface of the wheel 2 due to problems such as insufficient fastening force with the bolt 3b, insufficient friction, rust or corrosion of the structure, etc. Once the nut 3a comes off, the wheel 2 loses its fixed structure with the hub, and there is a high risk of it falling off.

[0011] The washer 10 has a through hole 11 and a fitting portion 12. The fastening part 3 is inserted through the through hole 11 to fix the washer 10. The volume of the fastening part 3 covers at least a part of the fitting portion 12. As shown in Figs. 2 and 4 to 6, the washer 10 is installed on the surface of the wheel 2 by the bolt 3b inserted through the through hole 11, and when the nut 3a and the bolt 3b are rotated to screw and fix the washer 10, the washer 10 is sandwiched between the nut 3a and the surface of the wheel 2. The fitting portion 12 has a groove shape, and fixes the outer shell 20 to the washer 10.

[0012] The outer shell 20 includes an upper outer shell 21 and a lower outer shell 22. The upper outer shell 21 has an upper extension 211, and the lower outer shell 22 has a lower extension 221. The upper extension 211 and the lower extension 221 are combined with each other and fitted and fixed to the fitting portion 12. The inside of the outer shell 20 has a space for disposing the looseness sensor module 30 and the power supply component 40, which prevents the looseness sensor module 30 and the power supply component 40 from being directly damaged by foreign objects from the outside.

[0013] Furthermore, since the present invention is exposed to the outside of the wheel 2 and is constantly exposed to wind, sunlight, and rain, the shell 20 must have a certain level of waterproofing and shockproofing. The waterproofing must be IP64 or higher to prevent rainwater from entering or water from washing the car from entering. The shockproof coefficient must be greater than 1500g. This prevents damage caused by pebbles or debris from the ground during the vehicle's travel, or by accidentally hitting a bolt during daily inspection. In this embodiment, the material of the shell 20 does not contain metal that has interference problems, so that wireless signals can be effectively blocked.

[0014] 1 to 3, the surface of the upper extension 211 is provided with a number of protrusions 212. The protrusions 212 can increase the frictional force, so that the shell 20 can more effectively prevent the slippage problem when the nut 3a is screwed. The lower shell 22 further has a detection hole 222 disposed in the lower extension 221, which is used to insert the loosening sensor module 30 therethrough, so that the loosening sensor module 30 can detect the screwing state of the fastener 3.

[0015] In the embodiment of the present invention, it should be defined first that the horizontal direction is parallel to washer 10 itself, and the vertical direction is the same as the thickness direction of washer 10. As shown in Fig. 1 to Fig. 3, upper extension portion 211 has a larger horizontal width at a portion close to the center position of washer 10 than the width at a portion away from the center position of washer 10, and lower extension portion 221 corresponds to the shape of upper extension portion 211, and has a larger horizontal width at a portion close to the center position of washer 10 than the width at a portion away from the center position of washer 10. In addition, the horizontal width of the fitting portion 12 near the center position of the washer 10 is larger than the width of the fitting portion away from the center position of the washer 10. Among them, the upper extension portion 211, the lower extension portion 221, and the fitting portion 12 are shaped with a head (wide) and a neck (narrow). This corresponds to the effect of centrifugal force caused when the tire and the wheel are rotating, and has the effect of preventing the outer shell 20 from falling off and being separated from the connected and fixed relationship with the washer 10. Therefore, as can be seen from the above explanation, simply by providing a design in which the portion away from the center position of the washer 10 is narrow and small, it is possible to prevent the problem of the outer shell 20 being separated from the connection with the washer 10 due to centrifugal force as described above. For example, the upper extension portion 211, the lower extension portion 221, and the fitting portion 12 can be designed to have an inverted triangle, a T-shape, or other shape. The above-mentioned objective can be achieved by designing the washer 10 so that the portion close to the center is the head (wide) and the portion far from the center is the neck (narrow). In addition, the washer 10 and the outer shell 20 can be designed as one piece. This can avoid the problem of instability at the joint where different materials are joined.

[0016] The loosening sensor module 30 includes a pressure sensor 31 disposed between the upper extension 211 and the lower extension 221. When the fastening parts 3 are tightly fastened and press against the surface of the wheel 2, the pressure sensor 31 detects the fastening force. When the pressure sensor 31 detects the loss of the fastening force, the loosening sensor module 30 transmits a warning signal to warn that the fastening parts 3 are not screwed tightly. In this embodiment, the loosening sensor module 30 is an electronic device that sensitively detects the gap and then transmits an electronic signal.

[0017] 7, in an embodiment of the present invention, the loosening sensor module 30 further includes an alarm unit 32. The alarm unit 32 is coupled with the pressure sensing part 31, and when the pressure sensing part 31 detects the loss of the tightness force, the alarm unit 32 sends out an alarm signal.

[0018] 3, 5 and 7, in an embodiment of the present invention, the pressure sensing unit 31 further includes a sensing post 311 disposed in the sensing hole 222. The sensing post 311 extends from the sensing hole 222 and contacts the surface of the wheel 2. Depending on whether the sensing post 311 is close to or far from the wheel 2 corresponding to the fastening part 3, the sensing post 311 will be in a tight state P1 or a loose state P2. When the sensing post 311 is in the loose state P2, the pressure sensing unit 31 will send a loose signal to the warning unit 32, and the warning unit 32 will send a warning signal accordingly.

[0019] As shown in Figures 3, 5 to 7, in another embodiment of the present invention, when the detection pole 311 is in the tight state P1, the pressure sensing unit 31 continues to send a tight signal to the warning unit 32. When the detection pole 311 is in the loose state P2, the pressure sensing unit 31 stops sending a tight signal to the warning unit 32, and the warning unit 32 sends a warning signal correspondingly after it no longer receives the tight signal. It is also possible to set the warning unit 32 to send a warning signal correspondingly when the warning display time has elapsed since the pressure sensing unit 31 stopped sending the tight signal. This prevents the warning unit 32 from receiving the signal erroneously and avoids the situation of misreporting. In addition, the loosening sensor module 30 can set a transmission interval time. In this way, the pressure detector 31 transmits a tightness signal at a regular time based on the transmission interval time, thereby avoiding problems such as excessive power consumption and low continuity caused by the loosening sensor module 30. The transmission interval time can be set to once per minute, once per two minutes, once per three minutes, etc.

[0020] As described above, the pressure sensing unit 31 can achieve the purpose of accurately detecting the screw-in state of the fastening part 3 through two methods: sending a loose signal or stopping sending a tight signal when the detection post 311 is in the loose state P2.

[0021] It is also necessary to explain that the loosening sensor module 30 can be directly installed between the nut 3a and the surface of the wheel 2. In addition, if there is no sufficient flat surface at the position of the nut 3a or the wheel 2 corresponding to the loosening sensor module 30, the loosening sensor module 30 can be tightly sandwiched from both sides, and an auxiliary washer can be separately installed on one side of the nut 3a adjacent to the loosening sensor module 30. Alternatively, an auxiliary washer can be separately installed on one side of the wheel 2 adjacent to the loosening sensor module 30. An auxiliary washer can also be installed on both one side of the nut 3a adjacent to the loosening sensor module 30 and the surface of the wheel 2. As described above, a sufficient support structure on a flat surface can be provided, and the loosening sensor module 30 can be tightly sandwiched from both sides.

[0022] In one embodiment, the power supply component 40 is coupled to the loose sensor module 30, the circuit board 50, the signal transmission antenna 60, the position module 70, the status control module 80, the trigger control module 90, the light emitting module 100, the tire detection module 110, and the temperature detection module 120, and supplies power to the loose sensor module 30, the circuit board 50, the signal transmission antenna 60, the position module 70, the status control module 80, the trigger control module 90, the light emitting module 100, the tire detection module 110, and the temperature detection module 120. In this embodiment, the power supply component 40 is a button battery, which has the advantages of being able to supply power to the entire device with a relatively small volume, and having high stability and long life.

[0023] The circuit board 50 is disposed in the outer shell 20. In one embodiment, the circuit board 50 includes a processor 51. The processor 51 is coupled with the loose sensor module 30, and the processor 51 receives and transmits an alarm signal. In this embodiment, the circuit board 50 is a printed circuit board (PCB) or other electronic carrier board, which mainly carries electronic devices such as the loose sensor module 30, the power supply components 40, etc., as well as providing necessary chips thereon, such as touch control induction chips, oscillators, the processor 51, etc., for signal integration between the electronic devices.

[0024] In one embodiment, the signal transmission antenna 60 is provided on the circuit board 50 and is coupled to the processor 51 and the vehicle man-machine interface 4. The signal transmission antenna 60 is used to transmit a warning signal to the vehicle man-machine interface 4, and the vehicle man-machine interface 4 receives the warning signal and transmits the corresponding wheel looseness information to the user. Thus, the user knows that the fastener 3 is not tightly screwed based on the wheel looseness information. In addition, the signal transmission antenna 60 has an installation height H from the circuit board 50, and the installation height H is 0.2 cm to 2 cm. A suitable installation height H is 0.5 cm to 2 cm, which can reduce unstable signal transmission.

[0025] In this embodiment, the circuit board 50 is made of a material very close to the metal wheel. Therefore, the electromagnetic signal transmitted or received by the signal transmission antenna 60 is significantly affected by the metal shielding effect, which causes the signal transmission to be unstable and ineffective. Therefore, it is optimal to adopt a monopole antenna for the signal transmission antenna 60 of the present invention. The transmission frequency of the signal transmission antenna 60 can be 2.4 GHz, 315 MHz, or 433 MHz. Since the detection device of the present invention is received by the vehicle man-machine interface 4 together with the signal of the tire pressure gauge, the frequency of the signal can be the same or different from that of the tire pressure gauge according to the design needs.

[0026] In one embodiment, the position module 70 is provided on the hull 20 and coupled to the processor 51. The position module 70 corresponds to the position of the wheel 2 where the wheel looseness detection device 1 is installed, and records the position information. The position information is also transmitted to the vehicle man-machine interface 4 through the processor 51 and can be confirmed by the user. The position information may be, for example, such that wheel looseness detection devices 1 for No. 1 and No. 2 are placed on the left front wheel, wheel looseness detection devices 1 for No. 3 and No. 4 are placed on the right front wheel, wheel looseness detection devices 1 for No. 5 and No. 6 are placed on the left rear wheel, and wheel looseness detection devices 1 for No. 7 and No. 8 are placed on the right rear wheel, etc. This allows the vehicle man-machine interface 4 to clearly know which wheel 2 has generated an alarm based on the source of the signal.

[0027] In one embodiment, the state control module 80 is disposed in the hull 20 and coupled to the processor 51. The state control module 80 is used to control the off state, the detection state, and the sleep state of the loose wheel detection device 1. Moreover, the state control module 80 is a multi-stage switch, and controls the off state, the detection state, and the sleep state of the loose wheel detection device 1 in a multi-stage manner.

[0028] In one embodiment, the trigger control module 90 is disposed in the upper shell 21 and is coupled to the processor 51 and the state control module 80. When a user performs a trigger operation on the trigger control module 90, the trigger control module 90 outputs a corresponding trigger signal to the processor 51, and the state control module 80 correspondingly controls the loose wheel detection device 1 to an off state, a detection state, or a sleep state. In this embodiment, the trigger control module 90 is a capacitive trigger structure, and the user only needs to place his / her finger on the shell 20 to correspond to the position of the trigger control module 90. Based on the touch state, such as touching for 1 second, touching for 3 seconds, touching for 10 seconds, or touching once, twice, three times, etc., different trigger commands can be generated and different operations can be requested from the processor 51.

[0029] The light emitting module 100 is provided in the upper shell 21 and is coupled to the processor 51 and the state control module 80. The light emitting module 100 emits a corresponding light based on the off state, detection state, or sleep state of the loose wheel detection device 1, so that a user can know the actual operating state of the loose wheel detection device 1 from the light. For example, a continuous light indicates that the loose wheel detection device 1 is in the detection state, and a flashing light indicates that the loose wheel detection device 1 is in the sleep state.

[0030] In one embodiment, the tire detection module 110 is provided in the outer shell 20 and is coupled to the processor 51 and the state control module 80. The tire detection module 110 detects the rotational motion of the wheel 2 and outputs a tire rotation signal or a tire stop signal accordingly. When the tire detection module 110 outputs a tire rotation signal, the state control module 80 receives the tire rotation signal and controls the loose wheel detection device 1 to enter a detection state. Also, when the tire detection module 110 outputs a tire stop signal, the state control module 80 receives the tire stop signal and controls the loose wheel detection device 1 to enter a sleep state.

[0031] In one embodiment, the temperature detection module 120 is disposed in the shell 20 and coupled to the processor 51. The temperature detection module 120 is used to detect the temperature of the wheel 2, and when the temperature of the wheel 2 exceeds the temperature standard value, the temperature detection module 120 outputs a temperature warning signal to the processor 51. Thus, when the temperature detection module 120 detects a situation in which the wheel 2 is overheated, it sends a temperature warning signal to the processor 51. The processor 51 sends a temperature warning signal to the vehicle man-machine interface 4 in the vehicle through the signal transmission antenna 60 to alert the driver. In addition, the temperature detection module 120 used to monitor and control the temperature of the wheel 2 does not need a very accurate temperature detection ability, so it can be directly installed in the outer shell 20. Further temperature compensation is performed according to the temperature transmitted by the outer shell 20 to obtain the actual temperature of the wheel 2. Alternatively, a metal piece is installed to penetrate the outer shell 20 and contact the temperature detection module 120 and the wheel 2 respectively. The fast heat transfer ability of the metal piece allows the temperature detection module 120 to sense the temperature of the wheel 2 relatively accurately.

[0032] In one embodiment, the direction display element 130 is provided on the upper shell 21, and when the fastening element 3 is screwed and fixed, the direction display element 130 focuses on the mark 2b on the wheel 2. In this embodiment, the number of fastening elements 3 is two or more, and the number of wheel looseness detection devices 1 is also two or more. When the multiple fastening elements 3 are all screwed and fixed, the direction display elements 130 of two adjacent wheel looseness detection devices 1 are in focus with each other. Therefore, if the two adjacent direction display elements 130 are not in focus with each other when the vehicle has not yet started or is stopped, the user or driver can know that the fastening elements 3 are already loose.

[0033] 4 shows an example of an embodiment of the present invention, in which the direction display element 130 is in the shape of an arrow for easy identification by the user. In the process of the user turning the nut 3a and tightly fastening the bolt 3b to the surface of the wheel 2, the position of the direction display element 130 is adjusted to focus on the mark 2b, and after the bolt 3b and the nut 3a are interlocked and fixed, the direction display element 130 is also fixed to focus on the mark 2b. In this way, if the rotation of the nut 3a becomes loose, the user can easily visually see that the position of the direction display element 130 has shifted and the mark 2b is not in focus. In addition, the two wheel looseness detection devices 1 of the present invention are installed on two adjacent bolts 3b on the wheel 2, and the two focal points of the direction display elements 130 are aligned with each other. However, when the position of the direction display elements 130 is shifted and the user visually sees that the focal points of the two direction display elements 130 are not aligned with each other, it means that the nut 3a is probably loose and the position is shifted, thus achieving the purpose of checking the direction.

[0034] The steps for performing the detection are described below.

[0035] After the washer 10 connected to the loosening sensor module 30 is placed between the nut 3a and the surface of the wheel 2, and the nut 3a is completely screwed into the bolt 3b, the user touches the trigger control module 90, and after a certain period of time (for example, 3 or 10 seconds), the wheel loosening detection device 1 is activated. This means that the electronic components such as the processor 51 and the loosening sensor module 30 are activated. In addition, the light-emitting module 100 also lights up for the same period of time, indicating that the user has activated the device. At this time, the loosening sensor module 30 is sandwiched between the nut 3a and the surface of the wheel 2, and generates a normal operation signal and sends it to the processor 51. The processor 51 periodically transmits a normal operation signal to the vehicle man-machine interface 4 in the vehicle through the signal transmission antenna 60 to inform the driver in the vehicle that the screwing state of the wheel 2 is normal. In order to avoid excessive power consumption, the time interval for transmitting the normal operation signal to the vehicle man-machine interface 4 can be set to once per minute, once per two minutes, once per three minutes, etc.

[0036] While detection is being monitored and controlled by the wheel looseness detection device 1, if the nut 3a moves away from its corresponding position on the surface of the wheel 2 due to loosening, rotation, structural damage, etc., even if it is only a slight separation, the looseness sensor module 30 will detect it and send a looseness signal to the warning unit 32 or stop sending a tightness signal. The warning unit 32 outputs a warning signal to the processor 51 when it receives the loosening signal or when a certain time (which can be set to 1 second, 5 seconds, 30 seconds, or 2 minutes, etc.) has elapsed since the reception of the tight signal has stopped. The processor 51 also transmits a warning signal to the vehicle man-machine interface 4 in the vehicle through the signal transmission antenna 60, and the vehicle man-machine interface 4 notifies the driver by means of sound, vibration, light, etc. that the wheel 2 has become loose and that the vehicle should be stopped for inspection.

[0037] It is necessary to explain here that the loosening sensor module 30 can notify the processor 51 of two different change states in different ways, when the nut 3a is stably fixed and when it is loosened. This is in accordance with the technical requirements of the present invention, and is not necessarily determined by whether or not to transmit a signal.

[0038] The vehicle man-machine interface 4 is installed in the vehicle and transmits information to and from the user's communication device by wireless transmission. The communication device is a communication device or tablet PC equipped with a Bluetooth (registered trademark) interface, and the user can connect to the vehicle man-machine interface 4 through the communication device to automatically upload monitoring control detection information through the vehicle man-machine interface 4. The short-range wireless communication module is the medium for information transmission between the vehicle man-machine interface 4 and the communication device, and the long-range wireless communication module is the medium for transmission between the communication device and the cloud.

[0039] The vehicle man-machine interface 4 can be a vehicle computer, an externally connected main unit, a tablet computer, a mobile communication device, or can also include a short-range communication interface. The looseness sensor module 30 connects the signal transmission antenna 60 to the vehicle man-machine interface 4, and is equipped with an on-board diagnostic device (OBD) or connected to the vehicle's controller area network (CAN BUS), to evaluate whether the looseness is caused by human error or aging of parts. The short-range wireless communication module is a Bluetooth communication interface, and the long-range wireless communication module includes General Packet Radio Service (GPRS), cellular network, and mmWave.

[0040] This embodiment will be described with an example, when the looseness sensor module 30 is not subjected to pressure from an external force and enters a detection stop state, the user touches the trigger control module 90 to perform a trigger operation (e.g., touching for a certain period of time), which outputs a trigger signal to the processor 51, causing the wheel looseness detection device 1 controlled by the state control module 80 to enter a sleep state or directly enter an off state. When the looseness sensor module 30 is pressed by an external force and enters a detection state, the processor 51 determines that a trigger error has occurred, and the wheel looseness detection device 1 controlled by the state control module 80 continues to maintain the detection state.

[0041] In addition, the state control module 80 can also control the wheel looseness detection device 1 to automatically enter the detection state. For example, when the pressure sensing unit 31 detects a tightly fastened force and a certain time (for example, 10 seconds) has passed, the state control module 80 automatically controls the wheel looseness detection device 1 to change from the sleep state or the off state to the detection state. At the same time, the light-emitting module 100 also emits light and flashes for 1 to 3 seconds, thereby notifying the user that the wheel looseness detection device 1 has entered the detection state.

[0042] Moreover, the state control module 80 can also control the loose wheel detection device 1 to automatically enter a sleep state. For example, when the loose wheel detection device 1 detects that the tire has been stationary and inactive for a certain period of time, it will automatically enter the sleep state, and when the tire starts to rotate again, it will automatically activate the detection state.

[0043] Of course, each wheel looseness detection device 1 can input the position of the corresponding wheel 2 into the vehicle man-machine interface 4 in advance through the position module 70. For example, the monitoring and control detection devices for No. 1 and No. 2 are installed on the left front wheel, the monitoring and control detection device for No. 3 and No. 4 on the right front wheel, the monitoring and control detection device for No. 5 and No. 6 on the left rear wheel, and the monitoring and control detection device for No. 7 and No. 8 on the right rear wheel, etc. In this way, the vehicle man-machine interface 4 can clearly know which wheel 2 has generated an alarm based on the signal source.

[0044] It should be further explained that since the wheel looseness detection device 1 is installed on the surface of the wheel 2, the user can also simply touch the trigger control module 90 to have the position module 70 of the wheel looseness detection device 1 transmit a position signal to the vehicle man-machine interface 4, and can confirm which position of the wheel 2 the wheel looseness detection device 1 is on. To explain by way of example, the user can enter the setting screen for the positions of the wheel looseness detection device 1 and the wheel 2 through the settings on the vehicle man-machine interface 4, and also enter the setting of the "left front wheel" selected on the vehicle man-machine interface 4. Furthermore, if the user touches the trigger control module 90 within a certain period of time during this setting, the specific wheel looseness detection device 1 will be activated and transmit a position signal to the vehicle man-machine interface 4. Furthermore, the vehicle man-machine interface 4 will know that the specific wheel looseness detection device 1 is installed on the "left front wheel". By following this sequence, the wheels 2 at other positions can also be set one by one in the same manner, and the setting of each wheel 2 and each wheel looseness detection device 1 can be completed.

[0045] Although it should be explained separately, a wheel 2 has a plurality of bolts 3b and nuts 3a screwed together. Therefore, by installing a plurality of sets of the wheel loosening detection device 1 of the present invention on the same wheel 2, the screwing stability of a plurality of nuts 3a can also be monitored and controlled. However, most situations in which the wheel 2 comes off while traveling occur due to the majority of the nuts 3a becoming loose, and it is not necessarily necessary to install the wheel loosening detection device 1 of the present invention on all combinations of bolts 3b and nuts 3a on one wheel 2.

[0046] Therefore, the present invention has the following advantages.

[0047] (1) The wheel loosening detection device 1 of the present invention uses the loosening sensor module 30 to check whether the detection fastening part 3 is accurately and tightly screwed and fixed, detects the screwing status of the wheel 2 in real time, and achieves the purpose of preventing the wheel 2 from loosening.

[0048] (2) The wheel looseness detection device 1 of the present invention is integrated with the vehicle man-machine interface 4 through the signal transmission antenna 60. This allows the driver to know the screwing state of the wheel 2 at any time through the vehicle man-machine interface 4 during the driving process.

[0049] (3) The upper extension 211, the lower extension 221, and the fitting portion 12 of the present invention are designed with a head (wide portion) and a neck (narrow portion) shape, which effectively prevents the outer shell 20 from being shaken off and being separated from the fixed connection with the washer 10, and achieves the effect of stably mounting the washer 10 and the outer shell 20.

[0050] (4) The position module 70 of the present invention accurately records the position information of each wheel looseness detection device 1 and transmits it to the vehicle man-machine interface 4. This allows the driver to clearly know which wheel 2 has caused the alarm through the vehicle man-machine interface 4.

[0051] (5) The state control module 80 and the trigger control module 90 of the present invention enable the user to more conveniently and easily control the operation state of the loose wheel detection device 1. Moreover, the light-emitting module 100 enables the user to more clearly and directly understand the real-time operation state of the loose wheel detection device 1.

[0052] (6) The directional indication relationship between the direction indicating component 130 and the mark 2b of the present invention allows the user to more intuitively observe whether the fastening component 3 is loose.

[0053] Although the present invention has been described by the best embodiment, those skilled in the art can make various modifications in different forms without departing from the spirit and scope of protection of the present invention. The above-mentioned embodiments are only used to explain the present invention, and do not limit the scope of protection of the present invention. Therefore, all modifications and alterations made without departing from the creative spirit of the present invention shall be included in the scope of the claims of the present invention. [Explanation of symbols]

[0054] 1. Wheel looseness detection device 2 Wheels 2a Fastening hole 2b Mark 3 Fastening parts 3a Nut 3b Bolt 4 Vehicle man-machine interface 10 Washer 11 Through hole 12 Fitting part 20 Outer shell 21 Upper shell 211 Upper extension part 212 Protrusion 22 Lower shell 221 Lower extension part 222 Detection hole 30 Looseness Sensor Module 31 Pressure sensor 311 Detection Pillar 32 Warning Unit 40 Power Components 50 circuit board 51 Processors 60 Signal Transmission Antenna 70 Position Module 80 State Control Module 90 Trigger Control Module 100 Light Emitting Module 110 Tire Detection Module 120 Temperature Detection Module 130 Directional display parts P1 Close contact P2 Loose state H Installation height

Claims

1. A wheel looseness detection device that is installed on a wheel, The wheel is provided with a fastening hole; A fastening part is inserted through the fastening hole and fixed, and the wheel looseness detection device includes a washer, an outer shell, a looseness sensor module, and a power supply part, The washer has a through hole and a fitting portion, the fastening part is inserted through the through hole to fix the washer, and a volume of the fastening part covers at least a part of the fitting portion; The outer shell includes an upper outer shell and a lower outer shell, the upper outer shell has an upper extension portion, the lower outer shell has a lower extension portion, the upper extension portion and the lower extension portion are combined with each other and fitted into the fitting portion to be fixed to each other, The loosening sensor module includes a pressure sensor disposed between the upper extension and the lower extension, and when the fastening part is tightly fastened and the surface of the wheel is pressed, the fastening force is detected by the pressure sensor, and when the fastening force is lost by the pressure sensor, the loosening sensor module transmits a warning signal; the power supply component is coupled to the loose sensor module and supplies power to the loose sensor module. Wheel looseness detection device.

2. The wheel looseness detection device according to claim 1, characterized in that a plurality of protrusions are provided on a surface of said upper extension portion.

3. The wheel looseness detection device according to claim 1, characterized in that the upper extension portion has a width greater at a portion closer to the center position of the washer than at a portion farther from the center position of the washer, and the lower extension portion has a width greater at a portion closer to the center position of the washer than at a portion farther from the center position of the washer.

4. The wheel looseness detection device according to claim 1, characterized in that the looseness sensor module further comprises an alarm unit, the alarm unit and the pressure sensing part are coupled together, and when the pressure sensing part detects the loss of the tightness force, the alarm unit issues an alarm signal.

5. The wheel looseness detection device according to claim 4, characterized in that the lower shell further has a detection hole installed in the lower extension portion, the pressure sensing unit further has a detection post disposed in the detection hole, the detection post extends from the detection hole and contacts the surface of the wheel, the detection post is in a tight state or a loose state depending on whether the wheel is close to or far from the fastening part, when the detection post is in a loose state, the pressure sensing unit sends a loose signal to the warning unit, and the warning unit sends a warning signal accordingly.

6. The wheel looseness detection device according to claim 4, characterized in that the lower shell further has a detection hole installed in the lower extension, the pressure sensing unit further has a detection post disposed in the detection hole, the detection post extends from the detection hole and contacts the surface of the wheel, the detection post is in a tight state or a loose state according to whether the wheel is close to or far from the fastening part, when the detection post is in a tight state, the pressure sensing unit continues to send a tight signal to the warning unit, and the warning unit sends a warning signal accordingly.

7. 7. The wheel looseness detection device according to claim 6, wherein the warning unit issues a warning signal in response to a warning indication time that has elapsed since the pressure sensing portion stopped issuing the tightness signal.

8. 7. The wheel looseness detection device according to claim 6, wherein the looseness sensor module can set a transmission interval time, whereby the pressure detector transmits the tightness signal at a regular time based on the transmission interval time.

9. The wheel looseness detection device of claim 1, further comprising a circuit board disposed within the outer shell, the circuit board including a processor, the processor being coupled to the looseness sensor module, and the processor receiving and transmitting an alarm signal.

10. 10. The loose wheel detection device of claim 9, further comprising a signal transmission antenna mounted on a circuit board and coupled to a processor, the signal transmission antenna transmitting an alarm signal.

11. 11. The wheel looseness detection device according to claim 10, wherein the signal transmission antenna has an installation height from the signal transmission antenna to the circuit board, and the installation height is 0.2 cm to 2 cm.

12. 11. The wheel looseness detection device as claimed in claim 10, wherein the signal transmission antenna is coupled to a vehicle man-machine interface, which receives the warning signal and sends corresponding wheel looseness information to a user.

13. 10. The wheel looseness detection device of claim 9, further comprising a location module, the location module being mounted on the hull and coupled to the processor, the location module corresponding to a location of the wheel on which the wheel looseness detection device is installed and recording location information.

14. 10. The wheel slack detection device of claim 9, further comprising a state control module, mounted on the outer shell and coupled to the processor, the state control module being used to control an off state, a detection state and a sleep state of the wheel slack detection device.

15. The wheel slack detection device of claim 14, further comprising a trigger control module, the trigger control module being mounted on the upper shell and coupled to a processor and a state control module, wherein when a user performs a trigger operation on the trigger control module, the trigger control module outputs a corresponding trigger signal to the processor, and the state control module correspondingly controls the wheel slack detection device to an off state, a detection state, or a sleep state.

16. The wheel looseness detection device of claim 14, further comprising an illuminating module, the illuminating module being disposed on the upper shell and coupled to the processor and the state control module, the illuminating module emitting a corresponding light according to an off state, a detection state and a sleep state of the wheel looseness detection device.

17. 15. The wheel looseness detection device as claimed in claim 14, wherein said wheel looseness detection device further comprises a tire detection module, said tire detection module is provided on said hull and coupled to said processor and said state control module, said tire detection module detects the rotational motion of said wheel and correspondingly outputs a tire rotation signal or a tire stop signal, when said tire detection module outputs said tire rotation signal, said state control module receives said tire rotation signal and controls said wheel looseness detection device to enter a detection state, when said tire detection module outputs said tire stop signal, said state control module receives said tire stop signal and controls said wheel looseness detection device to enter a sleep state.

18. The wheel looseness detection device of claim 9, further comprising a temperature detection module, the temperature detection module being mounted on the outer shell and coupled to the processor, the temperature detection module being used to detect the temperature of the wheel, and when the temperature of the wheel exceeds a temperature standard value, the temperature detection module outputs a temperature warning signal to the processor.

19. The wheel looseness detection device as described in claim 1, further comprising a directional indication component, the directional indication component being provided on the upper outer shell, and when the fastening component is screwed and fixed, the directional indication component is focused on a mark on the wheel.

20. The wheel looseness detection device of claim 19, characterized in that the number of fastening parts is two or more, the number of wheel looseness detection devices is also two or more, and when all of the fastening parts are screwed and fixed, the directional indication parts of two adjacent wheel looseness detection devices are in focus with each other.

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