Arrangement structure of hall sensor on automobile electronic rain wiper electronic module

Abstract

The utility model discloses a kind of arrangement structure of Hall sensor on automobile electronic rain wiping electronic module, including motor magnetic steel, punching piece, worm, magnetic ring, circuit board, clamping groove, first sensor and clamping ring;The motor magnetic steel is provided with punching piece inside, and through-hole is opened on the outer surface of the side of punching piece, and through-hole is opened on punching piece, and worm is sleeved in through-hole;The utility model is with structured design, and the arrangement structure of Hall sensor on PCB board is arranged by innovative design, and can be extended and applied to Hall sensor detection scene of various brushless rain wiping motor, under the premise of not increasing manufacturing cost, the performance stability of motor control system is significantly improved, the device optimizes Hall signal uniformity, improves the detection accuracy under high-low speed working condition, three Hall sensors are divided into two sides of PCB board, in the shape of triangular space arrangement, and make center sensor be located below magnetic ring center axis, break through spacing adjustment limit.

Description

Technical Field

[0001] This utility model relates to the field of Hall sensor technology, and in particular to a Hall sensor arrangement structure on an automotive electronic wiper module. Background Technology

[0002] In the brushless motor control system of automotive electronic wipers, Hall sensors are core components used to detect rotor position and achieve precise motor commutation. Their arrangement directly affects the stability and control accuracy of motor operation. Currently, the Hall sensors in existing automotive electronic wiper modules generally adopt a single-sided parallel arrangement structure on the PCB, that is, multiple Hall sensors are arranged parallel to each other on one side of the PCB board along the same plane, all facing the outer peripheral surface of the motor magnetic ring to detect changes in the magnetic field. However, this arrangement has the following two significant drawbacks: firstly, the uniformity of the Hall signal is poor, resulting in insufficient detection accuracy at high speeds; secondly, under the existing parallel arrangement, due to the interaction between each Hall sensor and the magnetic ring... The relative positional deviation between them cannot be eliminated through structural optimization, resulting in inconsistent pulse widths and large phase difference fluctuations in the Hall signal output by the sensors, and obvious non-uniformity in signal distribution. Secondly, the adjustment of sensor spacing is limited, making signal debugging difficult. Due to the single-sided layout space of the PCB and the package size of the Hall sensor itself, the spacing between parallel sensors cannot be flexibly reduced or adjusted according to the optimal magnetic field detection requirements. Sensors on both sides are difficult to approach due to structural interference, resulting in poor signal phase matching. Compensation is required through complex software algorithms, which not only increases software development costs but also prolongs the debugging cycle, and it is difficult to fundamentally solve the signal consistency problem at the hardware level. Utility Model Content

[0003] The purpose of this invention is to provide a Hall sensor arrangement structure on an automotive electronic wiper module to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a Hall sensor arrangement structure on an electronic module of an automotive electronic wiper, including a motor magnet, a lamination is provided inside the motor magnet, a through hole is opened on one outer surface of the lamination, a through hole is opened on the lamination, and a worm gear is sleeved in the through hole.

[0005] As a further technical solution of this utility model, a magnetic ring is sleeved on one end of the worm gear.

[0006] As a further technical solution of this utility model, a retaining ring is provided on the inner wall of the magnetic ring, and a ring hole is opened in the retaining ring.

[0007] As a further technical solution of this utility model, a circuit board is provided on the outer wall of the magnetic ring.

[0008] As a further technical solution of this utility model, a wire groove is formed on one side of the outer wall of the circuit board, and a card slot is formed on one side of the outer wall of the circuit board.

[0009] As a further technical solution of this utility model, a through hole is formed on one side of the outer surface of the circuit board.

[0010] As a further technical solution of this utility model, a first sensor and a second sensor are provided on one outer surface of the circuit board, and a third sensor is provided on the other outer surface of the circuit board.

[0011] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This utility model adopts a structured design. Through an innovative design of the Hall sensor arrangement on the PCB board, this device can be extended to various Hall sensor detection scenarios in brushless wiper motors. Without increasing manufacturing costs, it significantly improves the performance stability of the motor control system. This device optimizes the uniformity of the Hall signal, improving detection accuracy under high and low speed conditions. Three Hall sensors are placed on both sides of the PCB board in a triangular spatial arrangement, with the central sensor located directly below the central axis of the magnetic ring. This structure, by precisely matching the relative positions of each sensor and the magnetic ring, allows the magnetic ring to rotate. The magnetic field changes detected by each sensor are more consistent, and the uniformity of the pulse width and phase difference of the output signal is significantly improved. It breaks through the limitation of spacing adjustment, reduces development costs and cycle, and adopts a triangular structure with two sides of the PCB board. It effectively avoids the spatial interference problem caused by the sensor package size when the single-sided parallel arrangement is used. The spacing between the two side sensors and the center sensor can be flexibly adjusted according to the magnetic field detection requirements, without being limited by the physical space constraints of the single-sided layout. This hardware structure optimization reduces the dependence on complex software compensation algorithms, which not only reduces the difficulty and cost of software development, but also shortens the system debugging cycle, and provides a reliable guarantee for signal consistency from the hardware level. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a bottom view of the structure of this utility model;

[0015] Figure 3This is a three-dimensional structural diagram of the rotor of the brushless wiper motor of this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the Hall sensor and magnetic ring of this utility model.

[0017] In the diagram: 1. Motor magnet; 2. Lamination; 3. Through hole; 4. Through hole; 5. Worm gear; 6. Magnetic ring; 7. Ring hole; 8. Circuit board; 9. Wire groove; 10. Slot; 11. First sensor; 12. Second sensor; 13. Third sensor; 14. Through hole; 15. Retaining ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Please see the appendix Figure 1 -Appendix Figure 4 This utility model provides an embodiment of a Hall sensor arrangement structure on an automotive electronic wiper module, including a motor magnet 1, a lamination 2 inside the motor magnet 1, a through hole 3 on one side of the outer surface of the lamination 2, a through hole 4 on the lamination 2, and a worm gear 5 sleeved in the through hole 4; a magnetic ring 6 is sleeved at one end of the worm gear 5, the surface of which has alternately distributed magnetic poles and generates a periodically changing magnetic field during rotation; a retaining ring 15 is provided on the inner wall of the magnetic ring 6, the retaining ring 15 has a ring hole 7, and the magnetic ring 6 is riveted to the retaining ring 15; a circuit board 8 is provided on the outer wall of the magnetic ring 6, providing precise installation positions for three sets of sensors; one side of the circuit board 8 A wire groove 9 is provided on the outer wall, and a slot 10 is provided on one side of the outer wall of the circuit board 8 to accommodate the wires connecting the Hall sensor and the main control circuit, as well as the copper foil traces, to avoid signal interference caused by messy wires; a through hole 14 is provided on one side of the outer surface of the circuit board 8 to avoid wire crossing or detours when wiring on both sides, and to reduce the length of the signal transmission path; a first sensor 11 and a second sensor 12 are provided on one side of the outer surface of the circuit board 8, and a third sensor 13 is provided on the other side of the outer surface of the circuit board 8. Through the triangular spatial layout, the three sets of sensors can capture the magnetic field changes when the magnetic ring 6 rotates more evenly, avoiding the problem of uneven signal distribution in the existing single-sided parallel arrangement.

[0020] Working principle: Using this utility model, firstly, the lamination 2 is placed inside the motor magnet 1. A through hole 3 is opened on one side of the outer surface of the lamination 2, which can reduce the overall weight of the motor magnet 1 and help to adjust the dynamic balance of the motor magnet 1. The worm 5 is sleeved in the through hole 4. A retaining ring 15 is provided on the inner wall of the magnetic ring 6, and a ring hole 7 is opened in the retaining ring 15. The worm 5 is sleeved in the ring hole 7. A circuit board 8 is provided on the bottom outer wall of the magnetic ring 6. A wire groove 9 and a retaining groove 10 are respectively opened on the two outer walls of the circuit board 8. A through hole 14 is opened on one side of the outer surface of the circuit board 8. A first sensor 11 and a second sensor 12 are provided on one side of the outer surface of the circuit board 8, and a third sensor 13 is provided on the other side of the outer surface of the circuit board 8. The three sets of sensors are arranged in a triangular shape, which effectively avoids the spatial interference problem caused by the sensor packaging size when arranged in parallel on one side. The distance between the sensors on both sides and the center sensor can be flexibly adjusted according to the magnetic field detection requirements, without being limited by the physical space constraints of a single-sided layout.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A Hall sensor arrangement structure on an automotive electronic wiper module, comprising a motor magnet (1), characterized in that: The motor magnet (1) is provided with a lamination (2), and a through hole (3) is provided on one side of the outer surface of the lamination (2). A through hole (4) is provided on the lamination (2), and a worm gear (5) is sleeved in the through hole (4).

2. The arrangement structure of Hall sensors on an automotive electronic wiper module according to claim 1, characterized in that: A magnetic ring (6) is fitted onto one end of the worm (5).

3. The arrangement structure of Hall sensors on an automotive electronic wiper module according to claim 2, characterized in that: A retaining ring (15) is provided on the inner wall of the magnetic ring (6), and a ring hole (7) is provided in the retaining ring (15).

4. The arrangement structure of Hall sensors on an automotive electronic wiper module according to claim 3, characterized in that: A circuit board (8) is provided on the outer wall of the magnetic ring (6).

5. The arrangement structure of Hall sensors on an automotive electronic wiper module according to claim 4, characterized in that: A wire groove (9) is provided on one side of the outer wall of the circuit board (8), and a card slot (10) is provided on one side of the outer wall of the circuit board (8).

6. The arrangement structure of Hall sensors on an automotive electronic wiper module according to claim 5, characterized in that: A through hole (14) is formed on one side of the outer surface of the circuit board (8).

7. The arrangement structure of Hall sensors on an automotive electronic wiper module according to claim 6, characterized in that: A first sensor (11) and a second sensor (12) are provided on one side of the outer surface of the circuit board (8), and a third sensor (13) is provided on the other side of the outer surface of the circuit board (8).

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