Waterproof and anti-vibration height sensor

Abstract

The utility model discloses a waterproof and anti-vibration height sensor, which comprises a shell, a pin framework, a pin piece, an inner frame, a rotating shaft, magnetic steel, a circuit board and a bracket, and mainly aims to inject the pin framework into the shell of a sensing head by adopting a secondary injection molding process and take the pin framework as a structural support of a plug part. The sealing cavity is filled with the epoxy resin for wrapping the circuit board and the contacts of the circuit board, so that the phenomena of welding spot falling, chip displacement and the like are avoided in a vibration environment of bumping of a vehicle, and the service life of the sensor is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of Hall effect sensors, and in particular to a waterproof and vibration-resistant height sensor. Background Technology

[0002] The vehicle height sensor is an important component of the automotive electronic control system. It is mainly used to detect the relative displacement between the vehicle body and the lower suspension arm or shock absorber support. Its working principle is that the change in vehicle height drives the rotating shaft through the rocker arm, which changes the magnetic field around the Hall chip. The Hall chip then outputs a corresponding voltage signal, thereby realizing the detection of vehicle height.

[0003] Existing vehicle height sensors often use an integrated injection molding process, where the housing is directly formed on the basis of the pins and combined with the pins to form the plug. However, due to the large structural size of the plug, it is prone to shrinkage and deformation during the cooling process of the housing injection molding, which can lead to potential water ingress paths between the pins and the housing of some sensors. Once water enters the plug, it will flow directly into core locations such as the Hall chip, causing the sensor to short-circuit and fail. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is as follows: a waterproof and vibration-resistant height sensor, including a shell, a pin frame, a pin component, an inner frame, a rotating shaft, a magnet, a circuit board, and a bracket. The pin frame is connected to the pin component by injection molding, and the shell is connected to the pin frame by secondary injection molding. The inner frame and the bracket are fixedly connected to the upper and lower sides of the shell, respectively. The rotating shaft is rotatably connected to the inner frame and is connected to the magnet by injection molding. The shell has a sealed cavity for accommodating the circuit board. The circuit board has a Hall chip corresponding to the magnet. The pin component extends into the sealed cavity and is electrically connected to the circuit board. The sealed cavity is filled with a filler.

[0005] By adopting the above technical solution, the pin skeleton is injected into the sensor head housing through a secondary injection molding process. The pin skeleton serves as the structural support for the plug, eliminating potential water ingress paths. The sealed cavity is filled with epoxy resin to encapsulate the circuit board and its contacts, ensuring that solder joints do not fall off or chips shift under the vibration of vehicle bumps, thus improving the sensor's service life.

[0006] The present invention is further configured such that the outer shell has an installation part and a plug part, the pin skeleton is embedded between the installation part and the plug part, the installation part has an independent upper installation cavity and a sealing cavity, and the inner frame is snapped into the upper installation cavity.

[0007] The above technical solution features an upper mounting cavity and a sealed cavity that are not interconnected, which isolates the rotating shaft, which is a moving component, from the circuit board, which is an electronic component. The outer shell is made of plastic, which does not affect the Hall chip's recognition of the magnetic field of the magnet. This ensures both the waterproofness of the electronic component and the accuracy of signal detection.

[0008] The present invention is further configured such that the mounting part has an inner ring part one and an outer ring part one, the inner frame has an inner ring part two and an outer ring part two coaxially distributed with the inner ring part, the outer ring part two is sleeved on the inner ring part one, the rotating shaft is rotatably connected to the inner ring part two, and the rotating shaft has a stepped part extending to the inner ring part one, and the magnet is disposed in the stepped part.

[0009] Using the above technical solution, the inner ring part one of the outer shell and the inner ring part two of the inner frame are combined to form a cavity for accommodating the rotating shaft. The inner ring part is fitted onto the rotating shaft, and a water seal is provided between the inner frame and the rotating shaft. The stepped part of the rotating shaft is engaged in the inner ring part one, effectively preventing the rotating shaft from axially detaching from the outer shell.

[0010] The present invention is further configured such that the outer ring portion is provided with a first locking block, the inner frame is provided with a second locking block that engages with the first locking block, and a transition groove for avoiding the first locking block, the transition grooves being symmetrically distributed on the inner frame.

[0011] Furthermore, the plug portion is provided with a snap-fit ​​portion, the mounting portion is provided with a positioning post and an inner hole one, the bracket is provided with a snap-fit ​​foot portion and a positioning hole corresponding to the snap-fit ​​portion and the positioning post, and an inner hole two distributed coaxially with the inner hole, the inner frame is provided with a threaded hole distributed coaxially with the inner hole one and the inner hole two, one side of the bracket is snapped to the outer shell through the snap-fit ​​foot portion and the positioning post, and the other side is threaded to the outer shell and the inner frame through the inner hole two.

[0012] Using the above technical solution, when pre-installing the inner frame and the outer shell, the first locking block of the outer shell is inserted along the adapter groove and then rotated until the first locking block and the second locking block are connected. When pre-installing the bracket and the outer shell, the locking feet and positioning holes of the bracket are inserted into the locking parts and positioning posts of the outer shell. Finally, only one screw is needed to connect the bracket, the outer shell and the inner frame, reducing the risk of fasteners falling off.

[0013] The present invention is further configured such that the upper and lower sides of the pin skeleton are provided with right-angled groove 1 and right-angled groove 2 distributed diagonally, and the front and rear sides of the pin skeleton are provided with limiting posts.

[0014] Furthermore, the top of the pin frame is provided with a connecting post, and the connecting post is provided with the right-angle groove.

[0015] By adopting the above technical solution, during the secondary injection molding of the shell, the X-axis and Z-axis directions of the right-angle groove one and right-angle groove two restrict the freedom of the pin skeleton, and the Y-axis direction of the pin skeleton is limited by the column axis, thereby fixing the pin skeleton and preventing the pin skeleton, as an insert, from deviating from the preset position under high temperature impact during the secondary injection molding, thus achieving precise positioning of the pin component.

[0016] The present invention is further configured such that the pin member has two or more sets of pins, a connecting tube is provided between the pins, and the pin skeleton is provided with a punching groove at the connecting tube.

[0017] Using the above technical solution, the pin assembly is formed into a pin skeleton through injection molding. After the pin skeleton is injection molded, the connecting tube between adjacent pins is cut through a punching groove, so that each pin is independently distributed to meet the power connection requirements of the circuit board.

[0018] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is an exploded view of the steel-magnetic assembly of this utility model;

[0022] Figure 4 This is a cross-sectional view of the steel magnet assembly of this utility model;

[0023] Figure 5 This is the utility model Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 6 This is a front view of the rotating shaft of this utility model;

[0025] Figure 7 This is a perspective view of the pin frame of this utility model;

[0026] The components are: 1-outer shell, 2-pin skeleton, 3-pin part, 4-inner frame, 5-spinning shaft, 6-magnet, 7-circuit board, 8-bracket, 9-Hall chip, 11-sealed cavity, 12-mounting part, 13-plug part, 14-upper mounting cavity, 15-inner ring part one, 16-outer ring part one, 17-block one, 18-clamping part, 19-positioning post, 20-inner hole one, 21-right angle groove one, 22-right angle groove two, 23-limiting post, 24-connecting post, 25-punching groove, 31-pin, 32-connecting tube, 41-inner ring part two, 42-outer ring part two, 43-water seal, 44-block two, 45-adapter groove, 46-threaded hole, 51-step part, 81-clamping foot part, 82-positioning hole, 83-inner hole two; Detailed Implementation

[0027] 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.

[0028] 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.

[0029] like Figure 1-3 As shown, this utility model provides a waterproof and vibration-resistant height sensor, including a housing 1, a pin frame 2, a pin component 3, an inner frame 4, a rotating shaft 5, a magnet 6, a circuit board 7, and a bracket 8. The pin frame 2 is connected to the pin component 3 by injection molding, and the housing 1 is connected to the pin frame 2 by secondary injection molding. The inner frame 4 and the bracket 8 are fixedly connected to the upper and lower sides of the housing 1, respectively. The inner frame 4 is rotatably connected to the rotating shaft 5, and the rotating shaft 5 is connected to the magnet 6 by injection molding. The housing 1 is provided with a sealed cavity 11 for accommodating the circuit board 7. The circuit board 7 is provided with a Hall chip 9 corresponding to the magnet 6. The pin component 3 extends into the sealed cavity 11 and is electrically connected to the circuit board 7, and the sealed cavity 11 is filled with a filler.

[0030] Combination Figure 3 , 4 As shown, in this embodiment, the outer shell 1 is provided with a mounting part 12 and a plug part 13. The pin frame 2 is embedded between the mounting part 12 and the plug part 13. The mounting part 12 is provided with an independent upper mounting cavity 14 and a sealing cavity 11. The inner frame 4 is snapped into the upper mounting cavity 14. The mounting part 12 is provided with an upper mounting cavity 14 and a sealing cavity 11 that are not interconnected, so that the rotating shaft 5, which is a moving component, is isolated from the circuit board 7, which is an electronic component. Moreover, the outer shell 1 is made of plastic, which does not affect the Hall chip 9's recognition of the magnetic field of the magnet 6, thus ensuring both the waterproofness of the electronic component and the accuracy of signal detection.

[0031] In this embodiment, the mounting part 12 is provided with an inner ring part 15 and an outer ring part 16. The inner frame 4 is provided with an inner ring part 2 41 and an outer ring part 2 42 coaxially distributed with the inner ring part 15. The outer ring part 2 42 is sleeved on the inner ring part 15. The rotating shaft 5 is rotatably connected to the inner ring part 2 41. The rotating shaft 5 is provided with a stepped part 51 extending to the inner ring part 15. The magnet 6 is provided in the stepped part 51. The inner ring part 15 of the outer shell 1 and the inner ring part 2 41 of the inner frame 4 are combined to form a cavity for accommodating the rotating shaft 5. The inner ring part 15 is sleeved on the rotating shaft 5. A water seal 43 is provided between the inner frame 4 and the rotating shaft 5, and the stepped part 51 of the rotating shaft 5 is snapped into the inner ring part 15, effectively preventing the rotating shaft 5 from axially separating from the outer shell 1.

[0032] Combination Figure 5 , 6 As shown, in this embodiment, the outer ring 16 is provided with a locking block 17, the inner frame 4 is provided with a locking block 44 that engages with the locking block 17, and a transition groove 45 for avoiding the locking block 17. The transition groove 45 is Z-shaped and is symmetrically distributed on the inner frame 4. The plug 13 is provided with a locking part 18, the mounting part 12 is provided with a positioning post 19 and an inner hole 20, the bracket 8 is provided with a locking foot 81 and a positioning hole 82 corresponding to the locking part 18 and the positioning post 19, and an inner hole 83 coaxially distributed with the inner hole 20. The inner frame 4 is provided with a threaded hole 46 coaxially distributed with the inner hole 20 and the inner hole 83. One side of the bracket 8 is engaged with the outer shell 1 through the locking foot 81 and the positioning post 19, and the other side is threadedly connected to the outer shell 1 and the inner frame 4 through the inner hole 83.

[0033] Combination Figure 7 As shown, in this embodiment, the upper and lower sides of the pin frame 2 are provided with right-angled slots 1 21 and 22 diagonally distributed. Limiting posts 23 are provided on the front and rear sides of the pin frame 2. A connecting post 24 is provided on the top of the pin frame 2, and the connecting post 24 is provided with right-angled slot 1 21. During the secondary injection molding of the outer shell 1, the right-angled slots 1 21 and 22 restrict the X and Z axes of the pin frame 2's degrees of freedom. The limiting posts 23 guide the pin frame 2 along the Y axis, thus fixing the pin frame 2. To prevent the pin skeleton 2, which serves as an insert, from deviating from its preset position under high-temperature impact during secondary injection molding, the pin component 3 is provided with two or more sets of pins 31, with connecting tubes 32 between the pins 31. The pin skeleton 2 is provided with a cutting groove 25 at the connecting tube 32. The pin component 3 is formed into the pin skeleton 2 through injection molding. After the pin skeleton 2 is injection molded, the connecting tubes 32 between adjacent pins 31 are cut through the cutting groove 25, so that each pin 31 is independently distributed to meet the power connection requirements of the circuit board 7.

[0034] The installation sequence of this utility model is as follows: First, the pin component 3 is placed into the mold, and the pin skeleton 2 is formed by injection molding. After injection molding, the connecting tube 32 between the pins is cut off through the punching groove 25 on the skeleton to ensure that each pin is independently conductive. Next, the pin assembly is placed into the secondary injection mold as an insert, and the outer shell 1 is injection molded. Then, the circuit board 7 is installed and the pin pins are welded and glued for shaping. The magnet 6 is placed into the mold, and the rotating shaft 5 is formed by injection molding. The rotating shaft 5 is fixed to the outer shell 1 by the inner frame 4. When installing the inner frame 4 and the outer shell 1, the first locking block 17 of the outer shell 1 is inserted along the transition groove 45 and then rotated clockwise until the first locking block 17 and the second locking block 44 are engaged. Finally, the locking foot 81 and the positioning hole 82 of the bracket 8 are inserted into the locking part 18 and the positioning post 19 of the outer shell 1. A bolt is taken and threaded through the inner hole 83 of the bracket 8 and the inner hole 20 of the outer shell 1 to the inner frame 4, thus completing the assembly.

[0035] The working principle of this utility model is that the rotating shaft 5 is connected to the vehicle body through a rocker arm. When the vehicle body height changes, the rotating shaft 5 is driven to rotate, thereby causing the magnetic field around the Hall chip 9 to change through the magnet 6. The Hall chip 9 senses the change in the surrounding magnetic field, converts it into a voltage signal and outputs it, thereby realizing real-time monitoring of the vehicle body height.

[0036] 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 waterproof and anti-vibration height sensor, characterized by, The device includes a housing (1), a pin frame (2), a pin component (3), an inner frame (4), a rotating shaft (5), a magnet (6), a circuit board (7), and a bracket (8). The pin frame (2) is connected to the pin component (3) by injection molding. The housing (1) is connected to the pin frame (2) by secondary injection molding. The inner frame (4) and the bracket (8) are fixedly connected to the upper and lower sides of the housing (1), respectively. The inner frame (4) is rotatably connected to the rotating shaft (5). The rotating shaft (5) is connected to the magnet (6) by injection molding. The housing (1) is provided with a sealed cavity (11) for accommodating the circuit board (7). The circuit board (7) is provided with a Hall chip (9) corresponding to the magnet (6). The pin component (3) extends into the sealed cavity (11) and is electrically connected to the circuit board (7). The sealed cavity (11) is filled with a filler.

2. A waterproof and anti-vibration height sensor according to claim 1, characterized in that: The outer shell (1) is provided with a mounting part (12) and a plug part (13). The pin skeleton (2) is embedded between the mounting part (12) and the plug part (13). The mounting part (12) is provided with an independent upper mounting cavity (14) and a sealing cavity (11). The inner frame (4) is snapped into the upper mounting cavity (14).

3. A waterproof and anti-vibration height sensor according to claim 2, characterized in that: The mounting part (12) is provided with an inner ring part (15) and an outer ring part (16). The inner frame (4) is provided with an inner ring part (41) and an outer ring part (42) coaxially distributed with the inner ring part (15). The outer ring part (42) is sleeved on the inner ring part (15). The rotating shaft (5) is rotatably connected to the inner ring part (41). The rotating shaft (5) is provided with a step part (51) extending to the inner ring part (15). The magnet (6) is provided in the step part (51).

4. A waterproof and anti-vibration height sensor according to claim 3, characterized in that: The outer ring (16) is provided with a locking block (17), the inner frame (4) is provided with a locking block (44) that engages with the locking block (17), and a transfer groove (45) for avoiding the locking block (17). The transfer groove (45) is rotationally symmetrically distributed in the inner frame (4).

5. A waterproof and anti-vibration height sensor according to claim 4, characterized in that: The plug part (13) is provided with a snap-fit ​​part (18), the mounting part (12) is provided with a positioning post (19) and an inner hole one (20), the bracket (8) is provided with a snap-fit ​​foot part (81) and a positioning hole (82) corresponding to the snap-fit ​​part (18) and the positioning post (19), and an inner hole two (83) coaxially distributed with the inner hole one (20). The inner frame (4) is provided with a threaded hole (46) coaxially distributed with the inner hole one (20) and the inner hole two (83). One side of the bracket (8) is snapped to the outer shell (1) through the snap-fit ​​foot part (81) and the positioning post (19), and the other side is threaded to the outer shell (1) and the inner frame (4) through the inner hole two (83).

6. The waterproof and anti-vibration height sensor according to claim 1, wherein: The upper and lower sides of the pin frame (2) are provided with right-angled groove 1 (21) and right-angled groove 2 (22) distributed diagonally, and the front and rear sides of the pin frame (2) are provided with limiting posts (23).

7. A waterproof and anti-vibration height sensor according to claim 6, characterized in that: The top of the pin frame (2) is provided with a connecting post (24), and the connecting post (24) is provided with the right angle groove (21).

8. A waterproof and anti-vibration height sensor according to claim 7, characterized in that: The pin piece (3) is provided with two or more groups of pins (31), and the pins (31) are provided with connecting pipes (32), and the pin frame (2) is provided with a punching groove (25) at the connecting pipe (32).

Images