Fully-sealed magnetic control rocker arm type height sensor

Abstract

The utility model discloses a fully-sealed magnetic control rocker arm type height sensor, which comprises a Hall framework, a circuit board, a contact pin, a shell, a rocker arm, a clamping ring and magnetic steel, and mainly aims to form the Hall framework on the basis of the contact pin through one-time injection molding, and after the circuit board and the contact pin are welded, epoxy resin is poured into a mounting groove to form a filling layer. After curing, secondary injection molding is carried out to form a shell serving as a sensing component, and a rocker arm serving as a moving component is formed by primary injection molding on the basis of magnetic steel, so that the sensing component and the moving component of the sensor are of an integrated structure, the mounting steps are simplified, and the impact resistance and waterproofness of the sensor are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of Hall sensors, and in particular to a fully sealed magnetically controlled rocker arm height sensor. Background Technology

[0002] A rocker arm height sensor typically consists of a sensing component containing a Hall element and a moving component containing a magnet. Its working principle is to change the relative position of the magnet and the Hall element by swinging the moving component, thereby outputting a corresponding voltage signal.

[0003] Traditional height sensors typically have an inner cavity at the bottom of the housing for mounting the circuit board, and a base plate to seal the cavity, for ease of maintenance and debugging. After the circuit board is installed, the base plate is fixed to the housing by adhesive bonding or laser welding. However, with the increasing maturity of Hall effect circuit board design, the circuit structure of Hall effect circuit boards is now highly integrated and stable, eliminating the need for any tedious manual debugging or calibration work during production and assembly. Therefore, the base plate design in traditional height sensors has become an unnecessary redundancy and even poses a risk of water ingress into the sensor. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a fully sealed magnetically controlled rocker arm height sensor, including a Hall frame, a circuit board, a pin, a housing, a rocker arm, a retaining ring, and a magnet. The Hall frame has a pin and a mounting groove for mounting the circuit board. The pin is electrically connected to the circuit board. The mounting groove has a filling layer for wrapping the circuit board. The Hall frame is connected to the housing by secondary injection molding. The housing and the pin are combined to form a socket end. The housing is rotatably connected to the rocker arm by a retaining ring. The circuit board has a Hall chip facing the rocker arm, and the rocker arm has a magnet corresponding to the Hall chip.

[0005] Using the above technical solution, the Hall frame is formed by injection molding on the basis of the pins. After the circuit board and the pins are soldered, epoxy resin is poured into the mounting groove to form a filling layer. After curing, it is injection molded again to form the shell as the sensing component. The rocker arm as the moving component is formed by injection molding on the basis of the magnet. This makes the sensing component and the moving component of the sensor an integrated structure, which simplifies the installation steps and improves the sensor's impact resistance and waterproofness.

[0006] The present invention is further configured such that the outer shell has an integrally injection-molded main body, a steering part and a mounting part, the Hall frame is covered inside the main body, the rocker arm is integrally injection-molded to form a rotating shaft part and a lever arm part, the rotating shaft part is rotatably connected to the steering part, the steering part is provided with a groove for installing a retaining ring, and the mounting part is provided with a mounting hole for external connection of automotive suspension sheet metal.

[0007] Furthermore, the Hall frame is provided with a positioning hole and a positioning protrusion on the upper and lower sides respectively, and the steering part is provided with a positioning hole two that is coaxial with the positioning hole. The positioning protrusion passes through the bottom of the main body and the bottom surface of the positioning protrusion is coplanar with the bottom surface of the main body.

[0008] Using the above technical solution, positioning hole one and positioning hole two are combined to form an injection mold for fixing the upper limit structure of the Hall frame, while the positioning protrusion serves as the lower limit structure of the injection mold for fixing the Hall frame, effectively preventing the Hall frame from floating or shifting under the impact of plastic, and keeping the magnet parallel to the Hall chip.

[0009] The present invention is further configured such that the Hall frame is provided with a receiving groove for accommodating the Hall chip, and positioning holes are provided on both sides of the receiving groove.

[0010] By adopting the above technical solution, the distance between the magnet and the Hall chip is reduced by the receiving groove, which enables the Hall chip to obtain clearer magnetic field fluctuations and improves the sensitivity of the sensor.

[0011] The present invention is further configured such that the Hall frame is provided with a positioning groove one and a positioning groove two for fixing the pin during injection molding.

[0012] By adopting the above technical solution, when the Hall frame is formed by injection molding, the upper surface of the pin is fixed by the injection mold through positioning groove one and positioning groove two, and the solder foot of the pin is fixed by the mounting groove, so that the three sets of pins are independently and accurately distributed in the Hall frame, eliminating the welding error between the pin and the circuit board.

[0013] The present invention is further configured such that the bottom of the rotating shaft is provided with a circumferentially distributed snap-fit ​​portion, and an opening groove is provided between adjacent snap-fit ​​portions, and the magnet is embedded in the rocker arm through the snap-fit ​​portion.

[0014] By adopting the above technical solution, the magnet is permanently fixed inside the rocker arm through the snap-fit ​​part to prevent the magnet from falling off, and the magnet is exposed through the opening slot to reduce the medium interference between the magnet and the Hall chip.

[0015] The present invention is further configured such that the outer side of the rotating shaft is provided with a groove for engaging the retaining ring and a sealing groove for installing the sealing ring, and the rotating shaft is sealed to the outer shell by the sealing ring.

[0016] Furthermore, one side of the lever arm is used for the bushing of the connecting rod, and the other side is provided with process hole one and process hole two extending into the rotating shaft. Process hole two is distributed circumferentially around process hole one.

[0017] Using the above technical solution, the outer side of the rocker arm's rotating shaft is axially locked to the outer shell by a retaining ring and sealed to the outer shell by a sealing ring. The wall thickness of the rocker arm's rotating shaft is made uniform through process hole one and process hole two. During injection molding, the molten plastic can evenly fill the mold cavity, avoiding defects such as deformation and dents, and improving the yield rate of the rocker arm.

[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 a schematic diagram of the outer shell structure in this utility model;

[0022] Figure 4 This is the utility model Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 5 This is a schematic diagram of the Hall frame structure in this utility model;

[0024] Figure 6 This is a schematic diagram of the rocker arm in this utility model;

[0025] Wherein: 1-Hall frame, 2-Circuit board, 3-Pin, 4-Housing shell, 5-Rock arm, 6-Snap ring, 7-Magnet, 8-Filling layer, 9-Hall chip, 10-Sealing ring, 11-Mounting groove, 12-Positioning hole one, 13-Positioning protrusion, 14-Receiving groove, 15-Positioning groove one, 16-Positioning groove two, 41-Insertion end, 42-Main body, 43-Tuning part, 44-Mounting part, 45-Slot, 46-Mounting hole, 47-Positioning hole two, 51-Rotating shaft, 52-Force arm, 53-Snap fastener, 54-Opening groove, 55-Groove, 56-Sealing groove, 57-Bushing, 58-Process hole one, 59-Process hole two; Detailed Implementation

[0026] 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.

[0027] 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.

[0028] Combination Figure 1 , 2 As shown, this utility model provides a fully sealed magnetically controlled rocker arm height sensor, including a Hall frame 1, a circuit board 2, a pin 3, a housing 4, a rocker arm 5, a retaining ring 6, and a magnet 7. The Hall frame 1 has a pin 3 inside and a mounting groove 11 for mounting the circuit board 2. The pin 3 is electrically connected to the circuit board 2. The mounting groove 11 has a filling layer 8 for wrapping the circuit board 2. The Hall frame 1 is connected to the housing 4 by secondary injection molding. The housing 4 and the pin 3 are combined to form a socket end 41. The housing 4 is rotatably connected to the rocker arm 5 by the retaining ring 6. The circuit board 2 has a Hall chip 9 facing the rocker arm 5. The rocker arm 5 has a magnet 7 corresponding to the Hall chip 9.

[0029] Combination Figure 3 , 4 As shown, in this embodiment, the outer shell 4 is provided with an integrally injection-molded main body 42, a steering part 43, and a mounting part 44. The Hall frame 1 is enclosed within the main body 42. The rocker arm 5 is integrally injection-molded to form a rotating shaft part 51 and a lever arm part 52. The rotating shaft part 51 is rotatably connected to the steering part 43. The steering part 43 is provided with a groove 45 for mounting a retaining ring 6. The mounting part 44 is provided with mounting holes 46 for external connection to automotive suspension sheet metal. The upper and lower sides of the Hall frame 1 are respectively provided with positioning holes 12 and positioning protrusions 13. The steering part 43... The device has a second positioning hole 47 that is coaxial with the first positioning hole 12. The positioning protrusion 13 passes through the bottom of the main body 42, and the bottom surface of the positioning protrusion 13 is coplanar with the bottom surface of the main body 42. The first positioning hole 12 and the second positioning hole 47 are combined to form an injection mold for fixing the upper limit structure of the Hall frame 1, while the positioning protrusion 13 serves as an injection mold for fixing the lower limit structure of the Hall frame 1, effectively preventing the Hall frame 1 from floating or shifting under the impact of plastic, so that the magnet 7 and the Hall chip 9 remain parallel.

[0030] Combination Figure 5 As shown, in this embodiment, the Hall frame 1 is provided with a receiving groove 14 for accommodating the Hall chip 9, and positioning holes 12 on both sides of the receiving groove 14. The receiving groove 14 reduces the distance between the magnet 7 and the Hall chip 9, so that the Hall chip 9 can obtain clearer magnetic field fluctuations and improve the sensitivity of the sensor. The Hall frame 1 is provided with positioning groove 15 and positioning groove 26 for fixing the pins 3 during injection molding. When the Hall frame 1 is formed by injection molding, the upper surface of the pins 3 is fixed by the injection mold through the positioning groove 15 and positioning groove 26, and the solder feet of the pins 3 are fixed by the mounting groove 11, so that the three sets of pins 3 are independently and accurately distributed in the Hall frame 1, eliminating the welding error between the pins 3 and the circuit board 2.

[0031] Combination Figure 6As shown, in this embodiment, the bottom of the rotating shaft 51 is provided with circumferentially distributed snap-fit ​​portions 53, and an opening groove 54 is provided between adjacent snap-fit ​​portions 53. The magnet 7 is embedded in the rocker arm 5 through the snap-fit ​​portions 53, and the snap-fit ​​portions 53 permanently fix the magnet 7 in the rocker arm 5 to prevent the magnet 7 from falling off. The opening groove 54 exposes the magnet 7, reducing the medium interference between the magnet 7 and the Hall chip 9. The outer side of the rotating shaft 51 is provided with a groove 55 for snapping the retaining ring 6 and a sealing groove 56 for installing the sealing ring 10. The rotating shaft 51 is sealed to the outer shell 4 through the sealing ring 10. One side of the lever arm 52 is a bushing 57 for connecting the external connecting rod, and the other side is provided with process hole 1 58 and process hole 2 59 extending into the pivot 51. Process hole 2 59 is circumferentially distributed around process hole 1 58. The outer side of the pivot 51 of the rocker arm 5 is axially locked to the outer shell 4 by a retaining ring 6 and sealed to the outer shell 4 by a sealing ring 10. The process holes 1 58 and 2 59 make the wall thickness of the pivot 51 of the rocker arm 5 uniform. During injection molding, the molten plastic can evenly fill the mold cavity, avoiding defects such as deformation and dents, and improving the yield of the rocker arm 5.

[0032] The assembly process of this utility model is as follows: First, the Hall frame 1 is formed by injection molding on the basis of the pin 3 using the Hall frame 1 mold; second, the circuit board 2 is installed in the mounting groove 11, with the Hall chip 9 facing the receiving groove 14, at which point the pin 3 passes through the circuit board 2 and is soldered; next, epoxy resin is poured into the mounting groove 11 and cured to form a filling layer 8; then, the sensor housing 4, which serves as the sensing component, is formed by injection molding on the basis of the Hall frame 1 using the housing 4 mold; then, the rocker arm 5, which serves as the moving component, is formed by injection molding on the basis of the magnet 7, and after the sealing ring 10 is put on, it is snapped into the housing 4, and the rocker arm 5 is axially fixed to the housing 4 by the retaining ring 6, so that the sensing component and the moving component of the sensor are both integrated structures, simplifying the installation steps and improving the sensor's impact resistance and waterproofness.

[0033] 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 fully sealed magnetically controlled rocker arm height sensor, characterized in that, The device includes a Hall frame (1), a circuit board (2), a pin (3), a housing (4), a rocker arm (5), a retaining ring (6), and a magnet (7). The Hall frame (1) has a pin (3) inside and a mounting groove (11) for mounting the circuit board (2). The pin (3) is electrically connected to the circuit board (2). The mounting groove (11) has a filling layer (8) for wrapping the circuit board (2). The Hall frame (1) is connected to the housing (4) by secondary injection molding. The housing (4) and the pin (3) are combined to form a socket end (41). The housing (4) is rotatably connected to the rocker arm (5) through the retaining ring (6). The circuit board (2) has a Hall chip (9) facing the rocker arm (5). The rocker arm (5) has a magnet (7) corresponding to the Hall chip (9).

2. The fully sealed magnetically controlled rocker arm height sensor according to claim 1, characterized in that: The outer shell (4) is provided with an integrally injection-molded main body (42), a steering part (43) and a mounting part (44). The Hall frame (1) is covered inside the main body (42). The rocker arm (5) is integrally injection-molded to form a rotating shaft part (51) and a lever arm part (52). The rotating shaft part (51) is rotatably connected to the steering part (43). The steering part (43) is provided with a slot (45) for installing a retaining ring (6). The mounting part (44) is provided with a mounting hole (46) for external connection of automotive suspension sheet metal.

3. The fully sealed magnetically controlled rocker arm height sensor according to claim 2, characterized in that: The Hall frame (1) is provided with a positioning hole (12) and a positioning protrusion (13) on the upper and lower sides respectively. The steering part (43) is provided with a positioning hole (47) that is coaxial with the positioning hole (12). The positioning protrusion (13) passes through the bottom of the main body (42), and the bottom surface of the positioning protrusion (13) is coplanar with the bottom surface of the main body (42).

4. A fully sealed magnetically controlled rocker arm height sensor according to claim 3, characterized in that: The Hall frame (1) is provided with a receiving groove (14) for accommodating the Hall chip (9) and positioning holes (12) on both sides of the receiving groove (14).

5. A fully sealed magnetically controlled rocker arm height sensor according to claim 4, characterized in that: The Hall frame (1) is provided with a positioning groove one (15) and a positioning groove two (16) for fixing the pin (3) during injection molding.

6. A fully sealed magnetically controlled rocker arm height sensor according to claim 2, characterized in that: The bottom of the rotating shaft (51) is provided with a circumferentially distributed buckle (53), and an opening groove (54) is provided between adjacent buckle (53). The magnet (7) is embedded in the rocker arm (5) through the buckle (53).

7. A fully sealed magnetically controlled rocker arm height sensor according to claim 6, characterized in that: The outer side of the rotating shaft (51) is provided with a groove (55) for engaging the retaining ring (6) and a sealing groove (56) for installing the sealing ring (10). The rotating shaft (51) is sealed to the outer shell (4) by the sealing ring (10).

8. A fully sealed magnetically controlled rocker arm height sensor according to claim 7, characterized in that: One side of the lever arm (52) is used for the bushing (57) of the connecting rod, and the other side is provided with process hole one (58) and process hole two (59) extending into the rotating shaft (51). Process hole two (59) is distributed in a circle around process hole one (58).

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