Height sensor with high-precision flat structure

Abstract

The utility model discloses a height sensor with a high-precision flat structure, which comprises a sensor shell, a contact pin, a circuit board, a top cover, a bottom cover, a rotating shaft, a rocker arm and a torsion spring, and mainly aims to realize the integral injection molding of the sensor shell on the basis of the contact pin; the top cover and the bottom cover which can be welded through laser are connected to the openings in the upper side and the lower side of the sensor shell, installation conditions are provided for assembling a rotating shaft and a sealing circuit board on the sensor shell, the sensor shell is connected with the rocker arm through the rotating shaft in a snap spring clamping mode, the sensor shell and the rocker arm are designed to be flat, and therefore the overall size of the sensor is reduced; and the sensor is suitable for an installation environment with limited space.

Description

Technical Field

[0001] This utility model relates to the technical field of Hall sensors, and in particular to a high-precision, flattened height sensor. Background Technology

[0002] Vehicle height sensors are a crucial component of automotive electronic suspension systems, used to monitor real-time changes in the relative height between the vehicle body and the wheels. They convert the vertical movement of the suspension into electrical signals, which are then input into the control unit via photoelectric sensors. The onboard ECU adjusts the suspension damping and stiffness parameters based on these signals, thereby optimizing the vehicle's power, fuel economy, and handling stability. However, traditional height sensors often employ a secondary injection molding structure: a frame is injection molded on top of the pins, and then a shell is formed on top of that frame. This results in a thicker and heavier sensor housing. Furthermore, the sequential arrangement of functional components along the axial direction leads to a longer overall axial dimension and larger size, making it difficult to adapt to installation environments with limited chassis space. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is as follows: a high-precision flat height sensor, including a sensor housing, a pin, a circuit board, a top cover, a bottom cover, a rotating shaft, a rocker arm, and a torsion spring. The pin is provided inside the sensor housing. The top cover and the bottom cover are respectively sealed and connected to the upper and lower sides of the sensor housing. The upper and lower sides of the top cover of the sensor housing are respectively provided with a steering part and a mounting groove. The rotating part is rotatably connected to the rotating shaft. A magnet is provided between the rotating part and the top cover. The rotating shaft is snapped with a rocker arm for mounting the rotating part. A torsion spring for controlling the rocker arm to return to its original position is provided between the rocker arm and the rotating part. The mounting groove is connected to a circuit board that is electrically connected to the pin.

[0004] Using the above technical solution, the sensor housing is integrally injection molded based on the pin, and laser-welded top and bottom covers are connected to the openings on the upper and lower sides, providing installation conditions for the sensor housing assembly shaft and sealing circuit board. The sensor housing is connected to the rocker arm through the shaft by snap-fit, realizing the flat design of the sensor housing and rocker arm. This not only reduces the overall size of the sensor, but also makes the sensor suitable for installation environments with limited space.

[0005] The present invention is further configured such that the sensor housing is provided with a bushing inside the steering part, the bottom of the rotating shaft is provided with a step part one for abutting the bushing, the top of the rotating shaft is provided with a step part two for abutting the rocker arm, and a snap ring groove for installing the snap ring.

[0006] Furthermore, the two sides of the stepped part are provided with parallel positioning surfaces, and the rocker arm is engaged with the rotating shaft through the positioning surfaces.

[0007] Using the above technical solution, a metal bushing is embedded in the sensor housing. When assembling the rotating shaft, the rotating shaft passes through the bushing and is engaged with the rocker arm by a snap ring. The axial movement of the rotating shaft is restricted by the first step. The rocker arm abuts against the second step and the snap ring, and the rotating shaft and rocker arm are locked together by the positioning surface, thus eliminating the signal error caused by the axial displacement of the rotating shaft and rocker arm.

[0008] The present invention is further configured such that the rocker arm has a coaxially distributed fan-shaped boss and an outer ring portion, the fan-shaped boss is sleeved on the steering portion, and the steering portion has a limiting post corresponding to the fan-shaped boss, and the torsion spring is sleeved between the fan-shaped boss and the outer ring portion.

[0009] Furthermore, the torsion spring includes a torsion spring body and hooks one and two located at both ends of the torsion spring body. The sensor housing and outer ring are provided with slots one and two corresponding to hooks one and two.

[0010] Using the above technical solution, when the rocker arm rotates, the torsion spring is driven by the second slot to generate elastic potential energy, which provides kinetic energy for the rocker arm to reset and ensures accurate positioning. The torsion spring body is positioned and installed by the fan-shaped boss and the outer ring, and the rotation range of the rocker arm is limited by the limiting post to avoid the rocker arm driving the torsion spring to rotate excessively and to avoid the torsion spring's elastic potential energy being too large and damaging the plastic part structure.

[0011] The present invention is further configured such that the mounting groove is provided with mounting posts and positioning posts, the circuit board is provided with mounting holes and positioning holes adapted to the mounting posts and positioning posts, and the mounting posts are provided with stepped surfaces for abutting against the circuit board.

[0012] Using the above technical solution, when the circuit board is installed in the mounting slot through the mounting post, the pins are precisely inserted into the soldering holes of the circuit board. This precise positioning facilitates subsequent automatic soldering. The foolproof design of the positioning hole ensures that the circuit board can only be installed in one direction, preventing the circuit board from being installed backwards.

[0013] The present invention is further configured such that the outer side of the mounting groove is provided with a sealing surface that is the same as the outer contour of the bottom cover, the inner side of the mounting groove is provided with an annular groove for mounting the top cover, the top cover is provided with a connecting post that is adapted to the annular groove, and the mounting groove is provided with a filling layer for covering the circuit board.

[0014] Using the above technical solution, after the sensor housing is installed with the rotating shaft, the top cover is inserted into the annular groove through the connecting post and sealed by laser welding to prevent water leakage at the top of the mounting groove. The circuit board is fixed by pouring in epoxy resin, achieving all-round protection of the circuit board and its solder joints. No fasteners are required, reducing the risk of parts falling off and accidentally short-circuiting.

[0015] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a perspective view of the sensor housing in this utility model;

[0019] Figure 4 This is a bottom view of the sensor housing in this utility model;

[0020] Figure 5 This is a top view of the circuit board in this utility model;

[0021] Figure 6 This is a perspective view of the rotating shaft of this utility model;

[0022] Figure 7 This is a perspective view of the rocker arm in this utility model;

[0023] Wherein: 1-Sensor housing, 2-Pin, 3-Circuit board, 4-Top cover, 5-Bottom cover, 6-Rotating shaft, 7-Rock arm, 8-Torsion spring, 9-Magnet, 11-Tuning part, 12-Mounting groove, 13-Bushing, 14-Limiting post, 15-Slot one, 16-Mounting post, 17-Positioning post, 18-Step surface, 19-Sealing surface, 20-Circular groove, 31-Mounting hole, 32-Positioning hole, 33-Welding hole, 41-Connecting post, 61-Step part one, 62-Step part two, 63-Spring groove, 64-Positioning surface, 71-Fan-shaped boss, 72-Outer ring, 73-Slot two, 81-Torsion spring body, 82-Hook one, 83-Hook two; Detailed Implementation

[0024] The embodiments of this utility model will now be described with reference to the accompanying drawings. In this process, to ensure clarity and convenience, we may exaggerate the width of lines or the size of constituent elements in the drawings.

[0025] Furthermore, the terms used below are defined based on the functions of this utility model and may vary depending on the intentions or conventions of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0026] Combination Figure 1 , 2As shown, this utility model provides a high-precision flat height sensor, including a sensor housing 1, a pin 2, a circuit board 3, a top cover 4, a bottom cover 5, a rotating shaft 6, a rocker arm 7, and a torsion spring 8. The pin 2 is provided inside the sensor housing 1. The top cover 4 and the bottom cover 5 are respectively sealed and connected to the upper and lower sides of the sensor housing 1. The sensor housing 1 is provided with a steering part 11 and a mounting groove 12 on the upper and lower sides of the top cover 4, respectively. The rotating shaft 6 is rotatably connected to the steering part 11. A magnet 9 is provided between the rotating shaft 6 and the top cover 4. The rocker arm 7 for sleeve of the steering part 11 is engaged with the rotating shaft 6. A torsion spring 8 for controlling the rocker arm 7 to reset is provided between the rocker arm 7 and the steering part 11. The mounting groove 12 is connected to the circuit board 3 which is electrically connected to the pin 2.

[0027] Combination Figure 3 , 6 As shown, in this embodiment, the sensor housing 1 is provided with a bushing 13 inside the steering part 11. The bottom of the rotating shaft 6 is provided with a step part 61 for abutting the bushing 13, and the top of the rotating shaft 6 is provided with a step part 62 for abutting the rocker arm 7, as well as a snap ring groove 63 for installing the snap ring. The two sides of the step part 62 are provided with parallel positioning surfaces 64. The rocker arm 7 is snapped onto the rotating shaft 6 through the positioning surfaces 64. The sensor housing 1 is embedded with a metal bushing 13. When assembling the rotating shaft 6, the rotating shaft 6 is passed through the bushing 13 and the rocker arm 7 is snapped onto the snap ring. The axial movement of the rotating shaft 6 is restricted by the step part 61. The rocker arm 7 abuts between the step part 62 and the snap ring, and the rotating shaft 6 and the rocker arm 7 are locked together by the positioning surfaces 64, eliminating the signal error caused by the axial displacement of the rotating shaft 6 and the rocker arm 7.

[0028] Combination Figure 7 As shown, in this embodiment, the rocker arm 7 is provided with a coaxially distributed fan-shaped boss 71 and an outer ring portion 72. The fan-shaped boss 71 is sleeved on the steering portion 11, and the steering portion 11 is provided with a limiting post 14 corresponding to the fan-shaped boss 71. The torsion spring 8 is sleeved between the fan-shaped boss 71 and the outer ring portion 72. The torsion spring 8 includes a torsion spring body 81, and a first hook 82 and a second hook 83 provided at both ends of the torsion spring body 81. The sensor housing 1 and the outer ring portion 72 are provided with a first groove 15 and a second groove 73 corresponding to the first hook 82 and the second hook 83. When the rocker arm 7 rotates, the second groove 73 drives the torsion spring 8 to generate elastic potential energy, providing kinetic energy for the rocker arm 7 to reset and ensure accurate repositioning. The torsion spring body 81 is positioned and installed by the fan-shaped boss 71 and the outer ring portion 72, and the rotation range of the rocker arm 7 is limited by the limiting post 14 to prevent the rocker arm 7 from driving the torsion spring 8 to rotate excessively and to prevent the elastic potential energy of the torsion spring 8 from being too large and damaging the plastic part structure.

[0029] Combination Figure 4 , 5As shown, in this embodiment, the mounting groove 12 is provided with mounting posts 16 and positioning posts 17. The circuit board 3 is provided with mounting holes 31 and positioning holes 32 that are adapted to the mounting posts 16 and positioning posts 17. The mounting posts 16 are provided with stepped surfaces 18 for abutting the circuit board 3. When the circuit board 3 is installed in the mounting groove 12 through the mounting posts 16, the pins 2 are precisely inserted into the soldering holes 33 of the circuit board 3. Precise positioning facilitates subsequent automatic soldering. The positioning holes 32 are designed to prevent the circuit board 3 from being installed in only one direction.

[0030] In this embodiment, the outer side of the mounting groove 12 is provided with a sealing surface 19 that is the same as the outer contour of the bottom cover 5. The inner side of the mounting groove 12 is provided with an annular groove 20 for mounting the top cover 4. The top cover 4 is provided with a connecting post 41 that is adapted to the annular groove 20. The mounting groove 12 is provided with a filling layer for covering the circuit board 3. After the sensor housing 1 is installed with the rotating shaft 6, the top cover 4 is inserted into the annular groove 20 through the connecting post 41 and sealed by laser welding to avoid water leakage at the top of the mounting groove 12. The circuit board 3 is fixed by injecting epoxy resin, achieving all-round protection of the circuit board 3 and its solder joints. No fasteners are required, reducing the risk of accessories falling and accidentally short-circuiting.

[0031] The assembly process of this utility model is as follows: First, the sensor housing 1 is formed by injection molding based on the pin 2 and bushing 13. The magnet 9 is wrapped with plastic and fixed based on the rotating shaft 6. Second, the torsion spring 8 is pre-embedded outside the limiting post 14. The rotating shaft 6 passes through the bushing 13 and the water seal and then snaps onto the rocker arm 7. The rotating shaft 6 and the rocker arm 7 are fixed by the snap spring, and the snap hooks at both ends of the torsion spring 8 are respectively snapped into the first snap groove 15 and the second snap groove 73 of the sensor housing 1 and the rocker arm 7. Next, the top cover 4 is installed on the sensor housing 1 and fixed by gluing or laser welding. Then, the circuit board 3 is snapped into the mounting groove 12 by the positioning of the mounting post 16 and the positioning post 17, and the circuit board 3 is soldered to the pin 2. Then, epoxy resin is poured into the mounting groove 12 and cured to form a filling layer. Finally, the bottom cover 5 is installed on the sealing surface 19 of the sensor housing 1 and sealed and fixed by gluing or laser welding, thereby completing the assembly of the height sensor.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision, flattened height sensor, characterized in that, The sensor housing (1), pin (2), circuit board (3), top cover (4), bottom cover (5), rotating shaft (6), magnet (9), rocker arm (7) and torsion spring (8) are included. The pin (2) is provided inside the sensor housing (1). The top cover (4) and bottom cover (5) are respectively sealed and connected to the upper and lower sides of the sensor housing (1). The sensor housing (1) is provided with a steering part (11) and a mounting groove (12) on the upper and lower sides of the top cover (4). The rotating part (11) is rotatably connected to the rotating shaft (6). The rotating shaft (6) is provided with a magnet (9) between the rotating part (11) and the top cover (4). The rotating shaft (6) is snapped with a rocker arm (7) for fitting the rotating part (11). A torsion spring (8) for controlling the rocker arm (7) to reset is provided between the rocker arm (7) and the rotating part (11). The mounting groove (12) is connected to the circuit board (3) which is electrically connected to the pin (2).

2. The high-precision flattened height sensor according to claim 1, characterized in that: The sensor housing (1) is provided with a bushing (13) inside the steering part (11). The bottom of the rotating shaft (6) is provided with a step part (61) for abutting the bushing (13), the top of the rotating shaft (6) is provided with a step part (62) for abutting the rocker arm (7), and a snap ring groove (63) for installing the snap ring.

3. A high-precision, flattened height sensor according to claim 2, characterized in that: The two sides of the step part (62) are provided with parallel positioning surfaces (64), and the rocker arm (7) is engaged with the rotating shaft (6) through the positioning surfaces (64).

4. A high-precision, flattened height sensor according to claim 3, characterized in that: The rocker arm (7) is provided with a fan-shaped boss (71) and an outer ring (72) distributed coaxially. The fan-shaped boss (71) is sleeved on the steering part (11), and the steering part (11) is provided with a limiting post (14) corresponding to the fan-shaped boss (71). The torsion spring (8) is sleeved between the fan-shaped boss (71) and the outer ring (72).

5. A high-precision, flattened height sensor according to claim 4, characterized in that: The torsion spring (8) includes a torsion spring body (81) and hooks 1 (82) and 2 (83) located at both ends of the torsion spring body (81). The sensor housing (1) and the outer ring (72) are provided with slots 1 (15) and 2 (73) corresponding to hooks 1 (82) and 2 (83).

6. A high-precision, flattened height sensor according to claim 1, characterized in that: The mounting groove (12) is provided with mounting posts (16) and positioning posts (17). The circuit board (3) is provided with mounting holes (31) and positioning holes (32) that are adapted to the mounting posts (16) and positioning posts (17). The mounting posts (16) are provided with stepped surfaces (18) for abutting the circuit board (3).

7. A high-precision, flattened height sensor according to claim 6, characterized in that: The mounting groove (12) has a sealing surface (19) on the outside that is the same as the outer contour of the bottom cover (5). The mounting groove (12) has an annular groove (20) for mounting the top cover (4) on the inside. The top cover (4) has a connecting post (41) that is compatible with the annular groove (20). The mounting groove (12) has a filling layer for covering the circuit board (3).

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