Dustproof and waterproof height sensor

Abstract

The utility model relates to a dustproof and waterproof height sensor, which comprises a shell, a rotating shaft and a shaft sleeve sleeved on the outer side of the rotating shaft are arranged in the shell, the tail end of the rotating shaft is embedded into the shell and is provided with magnetic steel, and the top of the rotating shaft extends out of the shell and is connected with a swing rod; a first connecting part is formed at the end, facing the swing rod, of the shell, the rotating shaft is sleeved with a sealing ring, and the sealing ring is tightly attached to the rotating shaft and the first connecting part. The upper portion of the connecting cap is connected with the shell in a sealed mode to form an internal containing cavity, the bottom of the connecting cap extends outwards to form an external connecting cavity, and the signal terminal is arranged in the connecting cap in an injection molding mode and penetrates through the internal containing cavity and the external connecting cavity; a mounting seat is arranged in the internal accommodating cavity, a circuit board assembly is arranged on the mounting seat, and the Hall sensor is arranged on one surface, facing the magnetic steel, of the circuit board assembly and is opposite to the magnetic steel. The dustproof and waterproof performance of the height sensor can be improved.

Description

Technical Field

[0001] This utility model relates to height sensors, and in particular to a dustproof and waterproof height sensor. Background Technology

[0002] Commercial vehicle height sensors are primarily used in automotive suspension systems, particularly active, semi-active, and passive suspension systems. These sensors detect vehicle height (the relative displacement between the vehicle body and the lower control arm or shock absorber support) to help adjust vehicle performance and ensure driving safety and comfort.

[0003] Existing vehicle height sensors mostly convert changes in vehicle height into changes in the sensor's magnetic field angle. A Hall effect chip collects these changes and converts them into voltage or PWM signals, which are then output through signal terminals. When installing the signal terminals, a hole is typically made in the top cover, through which the signal terminals are connected to the circuit board inside the sensor. When installing the magnet, a common method is to press-fit one end of the magnet to the copper housing, and then press-fit the other end of the copper housing to the rotating shaft. This method offers poor dust and water resistance. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a dustproof and waterproof height sensor, which can improve the dustproof and waterproof performance of the height sensor.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to provide a dustproof and waterproof height sensor, comprising:

[0006] The housing contains a rotating shaft and a bushing fitted around the outside of the rotating shaft. The end of the rotating shaft is embedded in the housing and a magnet is installed thereon. The top of the rotating shaft extends out of the housing and is connected to a rocker arm. A first connecting portion is formed at one end of the housing facing the rocker arm. A sealing ring is fitted onto the rotating shaft. The sealing ring fits tightly with the rotating shaft and the first connecting portion, thus forming a seal between the inside and outside of the housing and between the housing and the rotating shaft.

[0007] A connecting cap is provided, the upper part of which is sealed to the housing to form an internal receiving cavity, and the bottom of the connecting cap extends outward to form an external connecting cavity. The external connecting cavity is provided with a signal terminal, which is injection molded inside the connecting cap and passes through the internal receiving cavity and the external connecting cavity. A mounting base is provided inside the internal receiving cavity, and a circuit board assembly is placed on the mounting base. A Hall sensor is placed on the side of the circuit board assembly facing the magnet to sense the magnetic field change generated by the magnet rotating with the shaft, and outputs a sensing signal through the signal terminal soldered to the circuit board assembly.

[0008] Furthermore, a magnet fixing component is connected to the end of the rotating shaft, and the magnet is injection molded inside the magnet fixing component.

[0009] Furthermore, the bushing is located between the sealing ring and the magnet fixing member.

[0010] Furthermore, a washer B and a retaining ring are also fitted onto the rotating shaft, with the washer B and the retaining ring located between the bushing and the magnet fixing member.

[0011] Furthermore, a gasket A is provided between the swing arm and the port of the first connecting part.

[0012] Furthermore, the other end of the housing has a second connecting part that snaps into the connecting cap, and an O-ring is fitted onto the outside of the second connecting part to seal the upper part of the connecting cap to the housing.

[0013] Furthermore, a sealing cover is fitted onto the outer side of the mounting base.

[0014] Furthermore, the circuit board assembly and the mounting base are integrated into a single unit using potting compound.

[0015] Furthermore, the external connection cavity is also provided with a calibration terminal, which is injection molded inside the connection cap and has one end passing through the external connection cavity and soldered to the circuit board assembly.

[0016] Furthermore, the magnet is NdFeB.

[0017] Beneficial effects

[0018] Due to the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art: This utility model greatly improves the dustproof and waterproof performance of the sensor by injection molding the signal terminal into the connecting cap and sealing the height sensor with sealing rings, sealing covers, potting compound, etc.; at the same time, the end structure of the magnet shaft is also encapsulated in plastic, making it more stable. Attached Figure Description

[0019] Figure 1 This describes the external appearance of an embodiment of this utility model;

[0020] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0021] Figure 3 This is a perspective view of the connecting cap and the circuit board assembly placed therein, according to an embodiment of the present invention.

[0022] Figure 4 This is an exploded view of an embodiment of this utility model. Detailed Implementation

[0023] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0024] The present invention relates to a dustproof and waterproof commercial vehicle body height sensor, the shape of which is as follows: Figure 1 As shown, its structure is as follows Figure 2 As shown, it includes:

[0025] The housing 10 contains a rotating shaft 3 and a bushing 8 fitted around the outside of the rotating shaft 3. The end of the rotating shaft 3 is embedded in the housing 10 and a magnet 6 is installed thereon. The top of the rotating shaft 3 extends out of the housing 10 and is connected to a rocker arm 2. A first connecting part 1001 is formed at one end of the housing 10 facing the rocker arm 2. A sealing ring 7 is fitted on the rotating shaft 3. The sealing ring 7 fits tightly with the rotating shaft 3 and the first connecting part 1001, so that a seal is formed between the inside and outside of the housing 10 and between the housing 10 and the rotating shaft 3.

[0026] A connecting cap 17 is formed by sealing the upper part of the connecting cap 17 with the housing 10 to form an internal receiving cavity. The bottom of the connecting cap 17 extends outward to form an external connecting cavity. A signal terminal 18 is provided in the external connecting cavity. The signal terminal 18 is injection molded in the connecting cap 17 and passes through the internal receiving cavity and the external connecting cavity. A mounting base 1701 is provided in the internal receiving cavity. A circuit board assembly 16 is placed on the mounting base 1701. The Hall sensor is placed on the side of the circuit board assembly 16 facing the magnet 6 to sense the change in the magnetic field generated by the magnet 6 rotating with the shaft 3, and outputs the sensing signal through the signal terminal 18 soldered to the circuit board assembly 16.

[0027] In some preferred embodiments, the end of the rotating shaft 3 is connected to a magnet fixing member 5, and the magnet 6 is injection molded inside the magnet fixing member 5.

[0028] To further improve the performance of the vehicle height sensor, one or more of the following improved structures can be adopted:

[0029] 1) The bushing 8 is located between the sealing ring 7 and the magnet fixing part 5; furthermore, a gasket B11 and a retaining ring 12 are also sleeved on the outside of the rotating shaft 3, so that the gasket B11 and the retaining ring 12 are located between the bushing 8 and the magnet fixing part 5.

[0030] 2) A shim A4 is provided between the swing arm 2 and the port of the first connecting part 1001;

[0031] 3) A second connecting part 1002 is formed at the other end of the housing 10 to be snapped into the connecting cap 17. An O-ring 13 is sleeved on the outside of the second connecting part 1002 to seal the upper part of the connecting cap 17 to the housing 10.

[0032] 4) Fit the sealing cover 15 onto the outside of the mounting base 1701;

[0033] 5) The circuit board assembly 16 and the mounting base 1701 are integrated into a single unit using potting compound 14;

[0034] 6) A calibration terminal 19 is provided in the external connection cavity. The calibration terminal 19 is injection molded in the connection cap 17 and one end of it passes through the external connection cavity and is soldered to the circuit board assembly 16.

[0035] 7) Magnet 6 is made of NdFeB.

[0036] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The following is a detailed description of each component in this embodiment:

[0037] Threaded bushing 1: Set inside the rocker arm 2, it is matched with the customer interface and used to drive the magnet to rotate;

[0038] Rocker arm 2: Rocker arm 2 is installed on the upper port of housing 10;

[0039] Rotating shaft 3: It is set in the housing 10, with one end connected to the swing arm 2 and the other end equipped with a magnet 6;

[0040] Gasket A4: Located between the swing arm 2 and the upper port of the housing 10;

[0041] Magnet fixing part 5: snap-fit ​​connection with the end of the rotating shaft 3;

[0042] Magnet 6: Injected into magnet fixing part 5;

[0043] Sealing ring 7: Located in the upper connecting part 1001 inside the housing 10 and sleeved on the rotating shaft 3, forming a seal between the housing 10 and the outside, and between the housing 10 and the rotating shaft 3;

[0044] Bushing 8: Set inside the housing 10 and fitted onto the rotating shaft 3;

[0045] Bushing 9: Located in the through hole on the outside of housing 10, used to fix the sensor to the vehicle body;

[0046] Housing 10: snaps together with connecting cap 17;

[0047] Gasket B11: Sleeves on the outside of shaft 3, made of POM material, which has the advantages of wear resistance, high strength and good corrosion resistance;

[0048] Snap ring 12: Sleeve on the outside of the rotating shaft 3. The snap ring and the washer have relative movement, which is used to limit the axial movement and fall off of the shaft.

[0049] O-ring 13: fitted onto the outside of the connecting part of housing 10;

[0050] Encapsulant 14: Encapsulates the mounting base of PCBA16 and connector cap 17;

[0051] Sealing cover 15: The outer side of the mounting base inside the connecting cap 17.

[0052] Circuit board assembly 16 with Hall IC: The Hall IC is disposed on the side facing the magnet 6 and directly below the magnet 6. Circuit board assembly 16 is snapped onto the mounting base 1701 of the connector cap 17.

[0053] Connecting cap 17: includes a housing mating cavity, an internal receiving cavity, and an external connecting cavity;

[0054] Signal terminal 18: Injected into the connector cap 17, with both ends passing through the inner cavity and the outer cavity, the end located in the inner cavity is soldered to the circuit board assembly 16, and connected to the client for signal transmission;

[0055] Calibration terminal 19: Injected into the connector cap 17, with both ends passing through the inner cavity and the outer cavity, and the end located in the inner cavity is soldered to the circuit board assembly 16 for sensor calibration during production.

Claims

1. A dustproof and waterproof height sensor, characterized in that, include: The housing contains a rotating shaft and a bushing fitted around the outside of the rotating shaft. The end of the rotating shaft is embedded in the housing and a magnet is installed thereon. The top of the rotating shaft extends out of the housing and is connected to a rocker arm. A first connecting portion is formed at one end of the housing facing the rocker arm. A sealing ring is fitted onto the rotating shaft. The sealing ring fits tightly with the rotating shaft and the first connecting portion, thus forming a seal between the inside and outside of the housing and between the housing and the rotating shaft. A connecting cap is provided, the upper part of which is sealed to the housing to form an internal receiving cavity, and the bottom of the connecting cap extends outward to form an external connecting cavity. The external connecting cavity is provided with a signal terminal, which is injection molded inside the connecting cap and passes through the internal receiving cavity and the external connecting cavity. A mounting base is provided inside the internal receiving cavity, and a circuit board assembly is placed on the mounting base. A Hall sensor is placed on the side of the circuit board assembly facing the magnet to sense the magnetic field change generated by the magnet rotating with the shaft, and outputs a sensing signal through the signal terminal soldered to the circuit board assembly.

2. The height sensor according to claim 1, characterized in that, The end of the rotating shaft is connected to a magnet fixing component, and the magnet is injection molded inside the magnet fixing component.

3. The height sensor according to claim 2, characterized in that, The bushing is located between the sealing ring and the magnet fixing member.

4. The height sensor according to claim 3, characterized in that, A washer B and a retaining ring are also fitted onto the rotating shaft, and the washer B and the retaining ring are located between the bushing and the magnet fixing member.

5. The height sensor according to claim 1, characterized in that, A gasket A is provided between the swing arm and the port of the first connecting part.

6. The height sensor according to claim 1, characterized in that, The other end of the housing has a second connecting part that snaps into the connecting cap. An O-ring is fitted onto the outside of the second connecting part to seal the upper part of the connecting cap to the housing.

7. The height sensor according to claim 1, characterized in that, A sealing cover is fitted onto the outside of the mounting base.

8. The height sensor according to claim 1, characterized in that, The circuit board assembly and the mounting base are integrated into a single unit using potting compound.

9. The height sensor according to claim 1, characterized in that, The external connection cavity is also provided with a calibration terminal, which is injection molded inside the connection cap and has one end passing through the external connection cavity and soldered to the circuit board assembly.

10. The height sensor according to claim 1, characterized in that, The magnet is NdFeB.

Images