Vehicle body height sensor with dustproof and limiting functions

Abstract

The utility model relates to the technical field of sensors, in particular to a vehicle body height sensor with dustproof and limiting functions, and aims to solve the technical problems that in the prior art, when a swing arm rotates, a gap of a contact part is enlarged and an internal circuit is easy to damage due to coaxiality deviation. The device comprises a connecting rod and a swing arm mechanism used for changing the angle along with the height of a vehicle body, a detection mechanism used for detecting the height of the vehicle body is installed below the swing arm mechanism, and the detection mechanism comprises a shell used for protecting the internal structure of the detection mechanism. A rotary friction surface is formed through the conical surface structure where the shell is in contact with the swing arm, the two parts play a role in guiding mutually during rotary motion, a gap can be kept unchanged for a long time on the premise that coaxiality does not deviate, a very small contact space can be formed through the conical contact surface, and the contact effect is good. And dust and sewage are prevented from entering the detection mechanism to influence mechanism rotation and a vehicle body detection circuit.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a vehicle height sensor that combines dustproof and limiting functions. Background Technology

[0002] The vehicle height sensor is an essential component in automobiles used to measure changes in the attitude of the front and rear suspensions. Depending on the vehicle's specific requirements, the sensor is fixed to the vehicle body using a bracket, and the sensor arm is connected to the corresponding suspension. When the vehicle moves up and down, the suspension causes the arm to rotate relative to the sensor. This converts the linear displacement of the vehicle height into an angular change. The sensor chip then uses the Hall effect to convert the angle into a digital signal, which is output to the ECU to detect the vehicle height. However, in existing vehicle height sensors, after prolonged rotation between the arm and the sensor housing, coaxiality misalignment increases, leading to a larger gap in the contact friction surfaces. When water or dust enters the shaft cavity, the rotational resistance increases, affecting the circuit board and causing damage or even destruction to the vehicle height sensor, resulting in inconvenience for vehicle users. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a vehicle height sensor that combines dust prevention and positioning functions. It solves the technical problem that existing technologies cause increased gaps in the contact area due to coaxiality misalignment, which can easily damage the internal circuitry. This achieves the goal of preventing the swing arm from shifting coaxiality and maintaining a gap, thus avoiding the impact of impurities on the circuit board.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a vehicle height sensor that combines dustproof and limiting functions, including a connecting rod and a swing arm mechanism for changing the angle with the vehicle height, and a detection mechanism for detecting the vehicle height is installed below the swing arm mechanism.

[0005] Furthermore, the testing mechanism includes a housing for protecting the internal structure of the testing mechanism, and the top of the housing is provided with a dustproof slope for preventing dust and sewage from entering the interior of the housing.

[0006] Furthermore, an internal rotating shaft is rotatably connected inside the outer casing. A connecting copper sleeve for connecting the swing arm mechanism is slidably engaged at the top of the internal rotating shaft. An oil seal for protection and sealing is fixedly connected in the middle of the internal rotating shaft. A magnet for generating a magnetic field is fixedly connected at the bottom of the internal rotating shaft. A Hall element for sensing the magnetic field generated by the magnet and a circuit board for generating current according to changes in the magnetic field are installed below the magnet.

[0007] Furthermore, a bushing for protecting the internal rotating shaft from wear is slidably connected below the oil seal in the middle of the internal rotating shaft, multiple connection pins for transmitting electrical signals are fixedly connected to the side end of the circuit board, and a bottom cover is fixedly connected to the bottom end of the outer casing.

[0008] Furthermore, the swing arm mechanism includes a swing arm rod, the lower surface of the side end of the swing arm rod is provided with a dustproof contact surface that is slidably connected to the dustproof inclined surface, and the top surface of the side end of the swing arm rod is provided with a connection position that is nested with the connecting copper sleeve.

[0009] Furthermore, a spherical connecting shaft is provided on the side end of the swing arm rod, and a cavity is opened on the side end of the detection mechanism to be slidably connected to the spherical connecting shaft.

[0010] Furthermore, the vehicle height sensor also includes a microprocessor module, an interface module for transmitting detection signals, and a detection module for detecting vehicle height.

[0011] Furthermore, the detection module consists of bidirectional transient suppression diodes D1 and D2, filter capacitors C1, C2, C3, C4, C5 and C6, shunt resistors R1 and R2, and chip U1. The detection signal is connected to the VDD interface of chip U1 through the shunt resistor R1. The bidirectional transient suppression diode D1, filter capacitor C1 and filter capacitor C2 are connected in parallel between the VDD interface and the NC interface of chip U1. The filter capacitors C4, C5, C6 and the bidirectional transient suppression diode D2 are connected in parallel between the VSS interface and the PWM interface of chip U1. The shunt resistor R2 is connected between filter capacitors C4 and C5.

[0012] Furthermore, the interface module consists of a power supply and a connection interface. The power supply is connected to the first connection interface, the third connection interface receives PWM signals, and the first connection interface outputs detection signals.

[0013] Furthermore, the model number of the chip U1 is CZMSH1V1.

[0014] By employing the above technical solution, this utility model provides a vehicle height sensor that combines dustproof and limiting functions, and has at least the following beneficial effects:

[0015] 1. This utility model forms a rotating friction surface through the conical surface structure of the outer shell and the swing arm. During rotation, the two parts guide each other, which not only maintains the gap unchanged for a long time without deviation of coaxiality, but also forms a very small contact space through the conical contact surface, preventing dust and sewage from entering the detection mechanism and affecting the rotation of the mechanism and the vehicle body detection circuit.

[0016] 2. This utility model, through the cooperation between the circuit board and the swing arm, can detect the vehicle height by the change of magnetic field. At the same time, it utilizes the change of current generated by the Hall element after the sewage receives the magnetic field. Once sewage is present, the unstable current fluctuation generated by the Hall element is used to detect the sewage. This not only improves the utilization of the Hall element, but also enables regular monitoring of sewage conditions, allowing the sensor to clean the sewage in time and extend its service life. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a cross-sectional view of a vehicle height sensor that combines dustproof and limiting functions according to this utility model;

[0019] Figure 2 This is an exploded view of the internal structure of the vehicle height sensor of this utility model;

[0020] Figure 3 This utility model Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 4 This is a structural block diagram of a vehicle height sensor that combines dustproof and limiting functions according to this utility model;

[0022] Figure 5 This is a circuit diagram of the detection module of the vehicle height sensor system of this utility model;

[0023] Figure 6 This is a circuit diagram of the interface module of the vehicle height sensor system of this utility model.

[0024] In the diagram: 1. Detection mechanism; 11. Housing; 111. Dustproof slope; 12. Connecting copper sleeve; 13. Oil seal; 14. Bushing; 15. Internal rotating shaft; 16. Magnet; 17. Hall element; 18. Circuit board; 19. Connecting pin; 110. Bottom cover; 2. Swing arm mechanism; 21. Swing arm rod; 22. Dustproof contact surface; 23. Connection position; 3. Connecting rod; 4. Microprocessor module; 5. Interface module; 6. Detection module. Detailed Implementation

[0025] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Due to technical issues with existing technology, the coaxiality misalignment during swing arm rotation leads to increased gaps in the contact area and can easily damage internal circuitry. Please refer to [reference needed]. Figure 1 - Figure 3 This embodiment proposes a vehicle height sensor that combines dustproof and limiting functions, ensuring the coaxiality of the swing arm remains constant and maintaining a gap to prevent impurities from affecting the circuit board. The device includes a connecting rod 3 and a swing arm mechanism 2 that changes angle according to vehicle height. A detection mechanism 1 for detecting vehicle height is installed below the swing arm mechanism 2. The detection mechanism 1 includes a housing 11 for protecting its internal structure. The top of the housing 11 has a dustproof slope 111 to prevent dust and wastewater from entering the housing 11. An internal rotating shaft 15 is rotatably connected inside the housing 11. A connecting copper sleeve 12 for connecting the swing arm mechanism 2 is slidably connected to the end. An oil seal 13 for protection and sealing is fixedly connected to the middle of the internal rotating shaft 15. A magnet 16 for generating a magnetic field is fixedly connected to the bottom of the internal rotating shaft 15. A Hall element 17 for sensing the magnetic field generated by the magnet 16 and a circuit board 18 for generating current according to the change of magnetic field are installed below the magnet 16. A bushing 14 for protecting the internal rotating shaft 15 from rotational wear is slidably connected below the oil seal 13 in the middle of the internal rotating shaft 15. Multiple connecting pins 19 for transmitting electrical signals are fixedly connected to the side of the circuit board 18. A bottom cover 110 is fixedly connected to the bottom of the outer shell 11.

[0027] The implementation process of this utility model is as follows: During use, the connecting copper sleeve 12 is rotatably connected to the swing arm mechanism 2. During use, if the swing arm mechanism 2 and the detection mechanism 1 rotate, the conical contact surface formed between the dustproof inclined surface 111 and the dustproof contact surface 22 can maintain coaxiality without deviation and keep the gap of the friction surface. The dustproof contact surface 22 acts like a cover connected to the dustproof inclined surface 111, preventing water or dust from easily entering the shaft cavity, increasing rotational resistance and affecting the use of the circuit board. The magnet 16 is fixedly embedded in the internal rotating shaft 15. When the magnet 16 is within a suitable distance from the chip U1 on the circuit board 18, the chip U1 can sense the magnetic force of the magnet 16. The magnet 16 has north and south poles, so the magnetic force will change when the magnet 16 rotates. Therefore, when the height of the car changes, the swing arm mechanism 2 of the height sensor connected to the car also rotates, thereby driving the magnet 16 to rotate. When magnet 16 rotates, the magnetic force sensed by chip U1 also changes. Chip U1 converts the strength of this magnetic force into the strength of an electrical signal, thus completing the detection of the vehicle height. The conical surface structure that contacts the outer shell and the swing arm forms a rotating friction surface. During rotation, the two parts guide each other, which not only maintains the gap constant over a long period of time without deviation of coaxiality, but also forms a very small contact space through the conical contact surface, preventing dust and sewage from entering the detection mechanism and affecting the rotation of the mechanism and the vehicle detection circuit.

[0028] The swing arm mechanism 2 includes a swing arm rod 21. The lower surface of the side end of the swing arm rod 21 is provided with a dustproof contact surface 22 that is slidably connected to the dustproof inclined surface 111. The top surface of the side end of the swing arm rod 21 is provided with a connection position 23 that is nested with the connecting copper sleeve 12. A spherical connecting shaft is provided on the side end of the swing arm rod 21. A cavity that is slidably connected to the spherical connecting shaft is provided on the side end of the detection mechanism 1.

[0029] The implementation process of this utility model is as follows: When the swing arm mechanism 2 and the detection mechanism 1 rotate, the conical contact surface formed between the dustproof inclined surface 111 and the dustproof contact surface 22 can be coaxial without deviation and maintain the gap of the friction surface. The dustproof contact surface 22 is connected to the dustproof inclined surface 111 like a cover, which prevents water or dust from easily entering the shaft cavity, increasing the rotation resistance and affecting the use of the circuit board. The swing arm rod 21 can serve as a connecting rod 3 and the detection mechanism 1. The connecting position 23 is fixedly connected to the copper sleeve 12, so that the internal rotating shaft 15 rotates in the connecting copper sleeve 12.

[0030] Since the sewage that penetrates deep into the interior cannot be detected in a timely manner, please refer to... Figure 4 - Figure 6 The vehicle height sensor, which can assist in detecting vehicle height and detect sewage entering the detection mechanism 1, also includes a microprocessor module 4, an interface module 5 for transmitting detection signals, and a detection module 6 for detecting vehicle height.

[0031] The detection module 6 consists of bidirectional transient suppression diodes D1 and D2, filter capacitors C1, C2, C3, C4, C5, and C6, shunt resistors R1 and R2, and chip U1. The detection signal is connected to the VDD interface of chip U1 through the shunt resistor R1. Bidirectional transient suppression diodes D1, filter capacitors C1 and C2 are connected in parallel between the VDD and NC interfaces of chip U1. Filter capacitors C4, C5, and C6, along with bidirectional transient suppression diode D2, are connected in parallel between the VSS and PWM interfaces of chip U1. A shunt resistor R2 is connected between filter capacitors C4 and C5. The chip U1 is model CZMSH1V1. The interface module 5 consists of a power supply and connection interfaces. The power supply is connected to the first connection interface, the third connection interface receives the PWM signal, and the first connection interface outputs the detection signal.

[0032] The implementation process of this utility model is as follows: When the magnet 16 is within a suitable distance from the chip U1 on the circuit board 18, the chip U1 can sense the magnetic force of the magnet 16. The magnet 16 has north and south poles, so the magnetic force will change when the magnet 16 rotates. Therefore, when the height of the car changes, the swing arm mechanism 2 of the height sensor connected to the car also rotates, thereby driving the magnet 16 to rotate. When magnet 16 rotates, the magnetic force sensed by chip U1 also changes. Chip U1 converts the strength of this magnetic force into the strength of an electrical signal, thus completing the detection of vehicle height. When sewage enters, the impurities inside the sewage will severely affect the sensing of the magnetic field by the Hall element of chip U1, causing the current generated by chip U1 to fluctuate greatly. This characteristic can be used to detect the impact of sewage and then promptly feed back to the vehicle user for quick sewage cleaning. Through the cooperation between the circuit board and the swing arm, the vehicle height can be detected by the change in magnetic field. At the same time, the change in current generated by the Hall element after receiving the magnetic field due to sewage causes the unstable current fluctuation of the Hall element to detect sewage. This not only improves the utilization of the Hall element but also allows for regular monitoring of sewage, enabling the sensor to clean up sewage in a timely manner and extending its service life.

[0033] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle body height sensor with dustproof and limiting functions, comprising a connecting rod (3) and a swing arm mechanism (2) for changing angle with vehicle body height, characterized in that, The detection mechanism (1) is installed below the swing arm mechanism (2) and is used to detect the height of the vehicle body. The detection mechanism (1) comprises a shell (11) used to protect the internal structure of the detection mechanism (1), and a dustproof slope (111) is arranged at the top end of the shell (11) to prevent dust and sewage from entering the interior of the shell (11). The interior of the shell (11) is rotationally connected with an internal rotating shaft (15), the top end of the internal rotating shaft (15) is slidingly connected with a connecting copper sleeve (12) used to connect the swing arm mechanism (2), the middle part of the internal rotating shaft (15) is fixedly connected with an oil seal (13) used for protection and sealing, and the bottom end of the internal rotating shaft (15) is fixedly connected with a magnet (16) used to generate a magnetic field.

2. The vehicle body height sensor according to claim 1, characterized by The middle part of the internal rotating shaft (15) is slidingly connected with a shaft sleeve (14) used to prevent the internal rotating shaft (15) from being abraded during rotation, the side end of the circuit board (18) is fixedly connected with a plurality of connecting pins (19) used to transmit electrical signals, and the bottom end of the shell (11) is fixedly connected with a bottom cover (110).

3. The vehicle body height sensor according to claim 1, characterized by, The swing arm mechanism (2) comprises a swing arm rod (21), and the side end of the swing arm rod (21) is provided with a dustproof contact surface (22) slidingly connected with the dustproof slope (111).

4. The vehicle body height sensor according to claim 3, characterized by The side end of the swing arm rod (21) is provided with a spherical connecting shaft, and the side end of the detection mechanism (1) is provided with a cavity slidingly connected with the spherical connecting shaft.

5. The vehicle body height sensor according to claim 1, characterized by The vehicle body height sensor further comprises a micro-processing module (4), an interface module (5) used to transmit detection signals, and a detection module (6) used to detect the height of the vehicle body. The detection module (6) is composed of bidirectional transient suppression diodes D1 and D2, filter capacitors C1, C2, C3, C4, C5 and C6, shunt resistors R1 and R2, and a chip U1 used to detect the height of the vehicle body and sewage, the detection signal is connected to the VDD interface of the chip U1 through the shunt resistor R1, the VDD interface and the NC interface of the chip U1 are connected in parallel with the bidirectional transient suppression diode D1, the filter capacitor C1 and the filter capacitor C2 in sequence, the VSS interface and the PWM interface of the chip U1 are connected in parallel with the filter capacitor C4, the filter capacitor C5, the filter capacitor C6 and the bidirectional transient suppression diode D2 in sequence, and the filter capacitor C4 and the filter capacitor C5 are connected with the shunt resistor R2.

6. The vehicle body height sensor according to claim 5, characterized by The interface module (5) is composed of a power supply, a first connection interface and a third connection interface, the power supply is connected to the first connection interface, the third connection interface receives the PWM signal, and the first connection interface outputs the detection signal.

7. The vehicle body height sensor according to claim 5, characterized by The model of the chip U1 is CZMSH1V1.

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