Vehicle body height sensor

Abstract

The utility model belongs to the technical field of vehicle body height sensors, and particularly relates to a vehicle body height sensor which comprises a support, a connecting ball head is rotatably mounted on the inner side of the support, a swing rod is fixedly mounted at the bottom of the connecting ball head, a sealing ring is fixedly mounted on the outer side of the swing rod, and a magnet is fixedly mounted at the bottom of the swing rod. A shell is arranged below the support, a height sensor is fixedly installed on the inner side of the shell, linear displacement of the height of a vehicle body is converted into angle change through the support and the swing rod, and a target magnet is driven to rotate; the electrical sensor chip detects magnetic field changes, converts angles into digital signals and outputs the digital signals to the ECU. The support is matched with the swing rod through the connecting ball head, so that rotation resistance is small. The swing rod and the magnet are integrally formed through injection molding, and the location degree of the magnet is guaranteed; lubricating grease is smeared above the swing rod, so that abrasion can be reduced; the height sensor and the shell rocker are sealed through sealant pouring, and waterproof and dustproof effects are achieved.

Description

Technical Field

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

[0002] As safety gains increasing attention, vehicle height sensors are no longer limited to mid-to-high-end cars but are increasingly being used in ordinary family cars. These sensors are essential components in automobiles for measuring changes in the attitude of the front and rear suspension. Currently, automotive suspension control systems (such as active suspension systems, suspension damping control systems, and air suspension systems) and automatic headlight adjustment systems all rely on these sensors to measure changes in the vehicle's driving posture. Their function is to convert vehicle height (the position of the vehicle's suspension system) into an electrical signal and send it to the suspension ECU. Based on Hall effect sensor technology, they utilize the characteristic that the output of a Hall element is proportional to the magnetic field. By designing a special magnetic circuit, they ensure that within a certain angular range, the magnetic field of the Hall element is proportional to the angle of rotation.

[0003] In existing technologies, the rocker arm and bracket experience significant wear and tear over long-term use, necessitating periodic replacement of the rocker arm. Furthermore, the vehicle height sensor requires the angle between the rocker arm and bracket to be recognized as an electrical signal, but this angle is difficult to define as 0 degrees. Different vehicle height sensors are required for different vehicles, limiting the device's applicability. Therefore, we propose a vehicle height sensor. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a vehicle height sensor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A vehicle height sensor includes a bracket, a connecting ball joint rotatably mounted on the inner side of the bracket, a swing arm fixedly mounted on the bottom of the connecting ball joint, a sealing ring fixedly mounted on the outer side of the swing arm, a magnet fixedly mounted on the bottom of the swing arm, a housing disposed below the bracket, a height sensor fixedly mounted on the inner side of the housing, and sealant fixedly mounted on the bottom of the height sensor.

[0007] By adopting the above technical solution, the linear displacement of the vehicle height is converted into angular changes through the bracket and rocker arm, which in turn drives the target magnet to rotate; the electrical sensor chip detects the magnetic field changes and converts the angle into a digital signal to be output to the ECU; the rocker arm and magnet are injection molded as a whole to ensure the position accuracy of the magnet; grease is applied to the top of the rocker arm to reduce wear; the height sensor and the housing rocker arm are sealed with sealant to make them waterproof and dustproof.

[0008] Preferably, the swing arm and the magnet are integrally injection molded, and the sealing ring is made of rubber.

[0009] By adopting the above technical solution, the one-piece molded swing arm and magnet enable the transmission of electrical signals after the angle changes, making the angle less prone to deviation and thus making the transmission of electrical signals more accurate.

[0010] Preferably, the sealant is a strong adhesive, and the height sensor is electrically connected to the ECU.

[0011] By adopting the above technical solution, the sealant can be used to seal the height sensor, making it less susceptible to water ingress and damage, and also preventing the height sensor from easily detaching from the housing.

[0012] Preferably, the bottom of the bracket is provided with a circular through groove, and the outer diameter of the connecting ball head is in contact with the inner diameter of the circular through groove.

[0013] By adopting the above technical solution, the bracket is connected to the swing arm through the connecting ball head, which reduces the rotational resistance and makes the bracket and connecting ball head less prone to wear during long-term use.

[0014] Preferably, the height sensor 7 has an interface model of PSI5 V2.1, a power supply voltage of 4-16.5V, and an operating temperature range of -40 degrees Celsius to 125 degrees Celsius.

[0015] By adopting the above technical solution, the height sensor 7 is less likely to overheat and be damaged during operation, and can work normally in high or low temperature environments, making the vehicle more stable during travel in winter or summer.

[0016] Preferably, the current consumption of the height sensor 7 is MAX49mA, the measurement range of the height sensor 7 is 4*90° / 2*180° / 3*120° / 1*360°, and the measurement accuracy of the height sensor 7 is + / -1.4°.

[0017] By adopting the above technical solution, the height sensor 7 has a larger measurement range and higher measurement accuracy.

[0018] Preferably, the height sensor 7 has a waterproof rating of IP6K9K and a functional safety rating of ASIL-B.

[0019] By adopting the above technical solution, the height sensor 7 is less likely to be waterlogged during normal use, thus making it less prone to damage.

[0020] Preferably, the housing includes an upper housing and a lower housing, the elastic cantilever is fixedly installed on the inner walls of the front and rear sides of the lower housing, the locking block is fixedly installed on the inner walls of the front and rear sides of the upper housing, one side of the elastic cantilever and the locking block is triangular in shape, and the elastic cantilever and the locking block are in contact with each other.

[0021] By adopting the above technical solution, the upper and lower shells can be quickly connected through the cooperation of the elastic cantilever and the locking block, making the upper and lower shells relatively stable and not easy to detach after the elastic cantilever and the locking block are engaged.

[0022] The bottom of the upper housing and the top of the lower housing are respectively provided with snap-fit ​​grooves. A positioning rod is fixedly installed around the bottom of the upper housing, and a positioning groove is provided around the top of the lower housing. The outer diameter of the positioning rod is the same as the inner diameter of the positioning groove.

[0023] By adopting the above technical solution, the positioning of the upper and lower shells is more convenient and quick, thus making the connection between the upper and lower shells faster and the positioning effect better.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] The linear displacement of the vehicle's height is converted into angular changes by a bracket and a rocker arm, which in turn rotates the target magnet. An electrical sensor chip detects changes in the magnetic field and converts the angle into a digital signal, which is then output to the ECU. The bracket engages with the rocker arm via a ball joint, minimizing rotational resistance. The rocker arm and magnet are injection molded as a single unit to ensure the magnet's positional accuracy. Lubricant is applied to the top of the rocker arm to reduce wear. The height sensor and the housing rocker arm are sealed with sealant for waterproofing and dustproofing.

[0026] The sensor senses changes in the magnetic field through the Hall effect, converts the angle change into an electrical signal, and can identify the height change corresponding to a specific angle range through calibration; 0° position (the 0° point can be modified through software settings). Attached Figure Description

[0027] Figure 1 An exploded three-dimensional view of a vehicle height sensor proposed in this utility model;

[0028] Figure 2 This is a partial three-dimensional structural diagram of a vehicle height sensor proposed in this utility model;

[0029] Figure 3 This is an exploded view of a vehicle height sensor proposed in this utility model.

[0030] In the diagram: 1. Bracket; 2. Connecting ball head; 3. Swing rod; 4. Sealing ring; 5. Magnet; 6. Housing; 7. Height sensor; 8. Sealant; 9. Upper housing; 10. Lower housing; 11. Elastic cantilever; 12. Locking block. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] refer to Figure 1-3 A vehicle height sensor includes a bracket 1, a connecting ball head 2 rotatably mounted on the inner side of the bracket 1, a swing rod 3 fixedly mounted on the bottom of the connecting ball head 2, a sealing ring 4 fixedly mounted on the outer side of the swing rod 3, a magnet 5 fixedly mounted on the bottom of the swing rod 3, a housing 6 disposed below the bracket 1, a height sensor 7 fixedly mounted on the inner side of the housing 6, and a sealant 8 fixedly mounted on the bottom of the height sensor 7.

[0033] In this embodiment, the rocker arm 3 and the magnet 5 are integrally injection molded, and the sealing ring 4 is made of rubber.

[0034] In this embodiment, the sealant 8 is made of a strong adhesive, and the height sensor 7 is electrically connected to the ECU.

[0035] In this embodiment, a circular through groove is provided at the bottom of the bracket 1, and the outer diameter of the connecting ball head 2 fits with the inner diameter of the circular through groove.

[0036] In this embodiment, the interface model of the height sensor 7 is PSI5 V2.1, the power supply voltage of the height sensor 7 is 4-16.5V, and the operating temperature of the height sensor 7 is -40 degrees Celsius to 125 degrees Celsius.

[0037] In this embodiment, the current consumption of the height sensor 7 is MAX49mA, the measurement range of the height sensor 7 is 4*90° / 2*180° / 3*120° / 1*360°, and the measurement accuracy of the height sensor 7 is + / -1.4°. In this embodiment, the waterproof rating of the height sensor 7 is IP6K9K, and the functional safety level of the height sensor 7 is ASIL-B.

[0038] In this embodiment, the housing 6 includes an upper housing 9 and a lower housing 10. The elastic cantilever 11 is fixedly installed on the inner walls of the front and rear sides of the lower housing 10, and the locking block 12 is fixedly installed on the inner walls of the front and rear sides of the upper housing 9. One side of the elastic cantilever 11 and the locking block 12 is triangular in shape, and the elastic cantilever 11 and the locking block 12 are in contact with each other.

[0039] The bottom of the upper housing 9 and the top of the lower housing 10 are respectively provided with snap-fit ​​grooves. A positioning rod is fixedly installed around the bottom of the upper housing 9, and a positioning groove is provided around the top of the lower housing 10. The outer diameter of the positioning rod is the same as the inner diameter of the positioning groove.

[0040] The specific operation is as follows: the linear displacement of the vehicle height is converted into an angular change through bracket 1 and swing arm 2, which drives the target magnet to rotate; the electrical sensor chip detects the magnetic field change and converts the angle into a digital signal, which is output to the ECU; bracket 1 cooperates with swing arm 3 through ball joint 2 to reduce rotational resistance; swing arm 3 and magnet 5 are injection molded as a whole to ensure the position accuracy of magnet 5; grease is applied to the top of swing arm 3 to reduce wear; height sensor 7 and housing 6 are sealed with rocker arm sealant 8 for waterproofing and dustproofing; the sensor senses the magnetic field change through the Hall effect and converts the angular change into an electrical signal, which can be calibrated to identify the height change corresponding to a specific angle range; 0° position (the 0° point can be modified through software settings).

[0041] The above provides a detailed description of a vehicle height sensor provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vehicle body height sensor characterized by comprising: Include: Support (1), the inner side of the support (1) is rotatably installed with a connecting ball head (2), the bottom of the connecting ball head (2) is fixedly installed with a swing lever (3), the outer side of the swing lever (3) is fixedly installed with a sealing ring (4), the bottom of the swing lever (3) is fixedly installed with a magnet (5), the lower side of the support (1) is provided with a shell (6), the inner side of the shell (6) is fixedly installed with a height sensor (7), the bottom of the height sensor (7) is fixedly installed with a sealing glue (8).

2. The vehicle body height sensor according to claim 1, characterized by The swing lever (3) and the magnet (5) are integrally formed by injection molding, and the sealing ring (4) is made of rubber material.

3. The vehicle body height sensor according to claim 1, characterized by The sealing glue (8) is made of strong adhesive glue, and the height sensor (7) is electrically connected with the ECU.

4. The vehicle body height sensor according to claim 1, characterized by The bottom of the support (1) is provided with a circular through slot, and the outer diameter of the connecting ball head (2) is matched with the inner diameter of the circular through slot.

5. The vehicle body height sensor according to claim 1, characterized by The interface model of the height sensor (7) is PSI5 V2.1, the power supply voltage of the height sensor (7) is 4-16.5V, and the working temperature of the height sensor (7) is-40 degrees Celsius to 125 degrees Celsius.

6. The vehicle body height sensor according to claim 1, characterized by The current consumption of the height sensor (7) is MAX49mA, the measurement range of the height sensor (7) is 4*90° / 2*180° / 3*120° / 1*360°, and the measurement accuracy of the height sensor (7) is + / -1.4°.

7. The vehicle body height sensor according to claim 1, characterized by The waterproof level of the height sensor (7) is IP6K9K, and the functional safety level of the height sensor (7) is ASIL-B.

8. The vehicle body height sensor according to claim 1, characterized by The shell (6) comprises an upper shell (9) and a lower shell (10), elastic cantilevers (11) are fixedly installed on the inner walls of the front and rear sides of the lower shell (10), clamping blocks (12) are fixedly installed on the inner walls of the front and rear sides of the upper shell (9), one side of the elastic cantilevers (11) and the clamping blocks (12) is triangular, and the elastic cantilevers (11) and the clamping blocks (12) are matched.

9. A vehicle body height sensor according to claim 8, wherein The bottom of the upper shell (9) and the top of the lower shell (10) are respectively provided with clamping grooves, a positioning rod is fixedly installed on the bottom of the upper shell (9), a positioning groove is formed on the top of the lower shell (10), and the outer diameter of the positioning rod is the same as the inner diameter of the positioning groove.

Images