Mounting structure of brushless motor hall plate

Abstract

The application discloses a mounting structure of a brushless motor Hall plate, which comprises a wire frame, the wire frame comprises a frame body and a plurality of circumferentially distributed limiting units arranged on one end surface of the frame body, the limiting units comprise first positioning blocks and second positioning blocks, the first positioning blocks are provided with first mounting holes, and the second positioning blocks are provided with outwardly extending positioning columns; and the Hall plate is connected with the wire frame, the Hall plate comprises a main body part and at least two connecting parts outwardly extending from one side of the main body part, second mounting holes and third mounting holes are formed in the connecting parts, fasteners are arranged in the second mounting holes, one end of the fasteners is connected with the first mounting holes, and the third mounting holes are connected with the positioning columns. The connecting parts of the Hall plate can be arbitrarily mounted through the plurality of circumferentially distributed limiting units arranged on the frame body, at least two connecting parts are arranged, and then the Hall plate can be mounted and positioned at multiple angles on the wire frame, so that the mounting flexibility is improved.

Description

Technical Field

[0001] This application relates to the technical field of brushless motors, and in particular to a mounting structure for a Hall plate of a brushless motor. Background Technology

[0002] The Hall elements within the Hall plate can be used to obtain the angular position of the motor rotor, enabling precise control of the motor's start and stop. Currently, Hall plates are typically installed on the stator core, stator coils, motor terminals, or stator frame, with the installation location chosen based on different functional requirements.

[0003] In the installation of Hall effect sensors, methods such as glue fixation, soldering fixation, or screw fixation are generally used, with screw fixation being widely used due to its ease of disassembly. For example, utility model patent CN221127065U discloses a "stator assembly, motor, and impact wrench," in which mounting holes are opened on the PCB board, and positioning posts are set on the wire frame. The PCB board is installed by screws passing through the mounting holes and threadedly connecting to the positioning posts. In this installation structure, because the position of the positioning posts on the wire frame is singular and fixed, the installation position between the PCB board and the wire frame is also fixed, resulting in fixed positions for the leads on the PCB board and the Hall element pins, making it impossible to adapt the installation. Utility Model Content

[0004] To enable the Hall plate to be installed at multiple angles on the wire frame, this application provides a mounting structure for a brushless motor Hall plate.

[0005] The mounting structure of the Hall plate for a brushless motor provided in this application adopts the following technical solution:

[0006] A mounting structure for a brushless motor Hall plate, comprising:

[0007] A cable frame, comprising a frame body and a plurality of circumferentially distributed limiting units disposed on one end face of the frame body, each limiting unit comprising a first positioning block and a second positioning block, the first positioning block having a first mounting hole, and the second positioning block having an outwardly extending positioning post; and

[0008] A Hall plate is connected to a wire frame. The Hall plate includes a main body and at least two connecting parts extending outward from one side of the main body. The connecting parts are provided with a second mounting hole and a third mounting hole. A fastener passes through the second mounting hole, and one end of the fastener is connected to the first mounting hole. The third mounting hole is engaged with a positioning post.

[0009] By adopting the above technical solution, the connecting part on the Hall plate can be connected to any limiting unit, thereby realizing the flexible installation of the Hall plate in a circumferential and multi-angle manner. Furthermore, by setting at least two connecting parts, the Hall plate is positioned through at least two points of installation. Secondly, during installation, the positioning post first engages with the third mounting hole to complete the initial positioning installation, and then the fastener passes through the second mounting hole of the Hall plate and connects with the first mounting hole to achieve the final fixation of the Hall plate, combining installation efficiency and installation stability.

[0010] Preferably, an insert is provided in the first mounting hole, and the insert has a threaded hole for threaded connection of one end of a fastener.

[0011] By adopting the above technical solution, the addition of inserts can replace the connection between the frame and the fasteners, and the threaded holes can be opened to connect with the fasteners, thereby improving the connection strength.

[0012] Preferably, the insert is a copper insert.

[0013] By adopting the above technical solution, the connection strength of the metal insert can be better improved after it is threadedly connected to the fastener. At the same time, it can also reduce the occurrence of thread stripping on the first mounting hole of the fastener and the wire frame during multiple disassembly, maintenance and installation of the Hall plate and the wire frame, which would affect the connection stability and strength of the Hall plate in the future.

[0014] Preferably, the fastener includes:

[0015] The end can abut against the end face of the Hall plate; and

[0016] A column, connected to an end and extending toward a limiting unit, the column including an optical axis segment connected to one end and a threaded segment connecting the optical axis segment;

[0017] The optical axis segment is rotatably connected to the second mounting hole, and the threaded segment is threadedly connected to the first mounting hole.

[0018] By adopting the above technical solution, when the Hall plate is further connected to the wire frame through fasteners, the optical axis section of the fastener can rotate relative to the Hall plate. In this way, the rotational damping between the fastener and the Hall plate can be reduced during the fastener connection process, and the relative friction and wear between the two can also be reduced.

[0019] Preferably, the optical axis segment and the threaded segment are stepped segments and the diameter of the optical axis segment is larger than the diameter of the threaded segment. The two form a shoulder at the connection point, and the shoulder abuts against the end face of the first positioning block.

[0020] By adopting the above technical solution, when the Hall plate is installed, the fastener rotates through external force. When the shoulder abuts against the first positioning block, the fastener is axially limited, giving the operator a mechanical limit indication, which can reduce the squeezing wear between the Hall plate and the wire frame.

[0021] Preferably, an adjustment shim is also provided between the end and the end face of the Hall plate.

[0022] By adopting the above technical solution, the setting of the adjusting shim can first reduce the squeezing wear between the end of the fastener and the Hall plate. Secondly, when the shoulder on the fastener abuts against the limiting unit, the rotation of the fastener cannot continue to feed. Due to the machining accuracy and installation accuracy of each component, the end of the fastener may not abut against the end face of the Hall plate, causing the Hall plate to move away from the limiting unit. The setting of the adjusting shim can fill the gap between the Hall plate and the end, limit the displacement of the Hall plate to the end, and better achieve the installation and limiting of the Hall plate.

[0023] Preferably, the first positioning block and the second positioning block have a gap to form a clearance groove, and the connecting part has a clearance hole that communicates with the clearance groove.

[0024] By adopting the above technical solution, the connection between the clearance hole and the clearance groove allows the pins or electrical leads of electronic components on the Hall plate to pass through and be guided and limited within the clearance groove.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By setting multiple circumferentially distributed limiting units on the frame, the connection part of the Hall plate can be installed arbitrarily. With at least two of them combined with the connection part, the Hall plate can be installed and positioned at multiple angles on the wire frame, thus improving the installation flexibility.

[0027] 2. By combining the positioning pins on the limiting unit with the fasteners, the Hall plate can be quickly positioned and installed stably. Furthermore, the fasteners adopt a multi-segment structure and additional insert threaded connections, which further improves the stability of the Hall plate when connected to the wire frame. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the mounting structure of the Hall plate of the brushless motor in Embodiment 1;

[0029] Figure 2 This is a schematic diagram of the wire frame structure in Example 1;

[0030] Figure 3 This is a schematic diagram of the connection between the wire frame and the Hall plate in Example 1;

[0031] Figure 4 The second embodiment mainly shows a schematic diagram of the connection between the fastener, the wire frame, and the Hall plate.

[0032] Explanation of reference numerals in the attached drawings: 1. Wire frame; 11. First positioning block; 111. First mounting hole; 12. Second positioning block; 121. Positioning post; 13. Relief groove; 2. Hall plate; 21. Main body; 22. Connecting part; 221. Second mounting hole; 222. Third mounting hole; 223. Relief hole; 3. Stator core; 4. Fastener; 41. End; 42. Optical shaft section; 43. Threaded section; 5. Insert; 6. Adjustment shim. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example 1

[0036] Figure 1 and Figure 2 An installation structure for a Hall plate of a brushless motor is shown, including a wire frame 1 and a Hall plate 2 mounted on one side of the wire frame 1. The wire frame 1 includes a frame body. In an embodiment, the frame body has two vertical spaces located on both sides, forming a space between the two frames for mounting and limiting the stator core 3. The Hall plate 2 is mounted on one side of the frame body. The frame body is generally disc-shaped, and a plurality of circumferentially distributed limiting units are provided on the end face of one of the frames body. The limiting units are arranged at intervals along the outer edge of the frame body.

[0037] The limiting unit includes a first positioning block 11 and an adjacent second positioning block 12. A clearance groove 13 is provided between the first positioning block 11 and the second positioning block 12. A first mounting hole 111 is provided on the first positioning block 11, and a positioning post 121 is provided on the end face of the second positioning block 12.

[0038] Combination Figure 3 The Hall plate 2 includes a main body 21 and at least two connecting parts 22 extending horizontally outward from the outer peripheral wall of the main body 21. In this embodiment, the Hall plate 2 has five connecting parts 22, and each connecting part 22 can be installed and connected to a limiting unit. When the Hall plate 2 is actually installed, the connecting part 22 can be selected to be connected to any limiting unit according to the applicability of electronic components and wiring requirements, thereby realizing the multi-angle installation of the Hall plate 2 in the horizontal direction.

[0039] Each connecting part 22 is provided with a second mounting hole 221, a third mounting hole 222, and a clearance hole 223 located between the second mounting hole 221 and the third mounting hole 222. The positioning post 121 is engaged in the third mounting hole 222. When the positioning post 121 of at least two limiting units is engaged with the third mounting hole 222, the Hall plate 2 is limited in the horizontal direction.

[0040] The second mounting hole 221 corresponds to the position of the first mounting hole 111, and is connected to the first mounting hole 111 by a fastener 4 passing through the second mounting hole 221, thereby realizing the installation between the Hall plate 2 and the wire frame 1. The first mounting hole 111 is also provided with an insert 5, which is a copper insert 5, and is pre-embedded in the first mounting hole 111 by hot melt injection molding. The wire frame 1 is made of insulating material, such as polyetheretherketone (PEEK). The insert 5 has a threaded hole that can be threaded to one end of the fastener 4, which greatly improves the connection strength between the fastener 4 and the wire frame 1.

[0041] The clearance hole 223 connects to the clearance groove 13, and the leads or pins of the electronic components on the Hall plate 2 can pass through the clearance groove 13. After the connecting part 22 is connected to the limiting unit, the upper opening of the clearance groove 13 is closed to form a wiring channel. Example 2

[0042] See Figure 4 The mounting structure of a brushless motor Hall plate differs from that of Embodiment 1 in that the fastener 4 includes an end 41 distributed in stepped segments and a column connecting the end 41. The column includes a connected optical shaft segment 42 and a threaded segment 43. One end of the optical shaft segment 42 is connected to the end 41. The shaft diameters of the end 41, the optical shaft segment 42 and the threaded segment 43 decrease sequentially. The end 41 can abut against the end face of the Hall plate 2 to press the Hall plate 2. The optical shaft segment 42 passes through the second mounting hole 221 to enable the fastener 4 to rotate relative to the Hall plate 2. The threaded segment 43 is connected to the threaded hole of the insert 5.

[0043] The diameter of the optical axis section 42 is larger than the diameter of the threaded section 43, thus forming a shoulder at the connection between the two. This shoulder can abut against the end face of the first positioning block 11 to achieve mechanical positioning of the Hall plate 2. An adjustment shim 6 is also provided between the end 41 and the Hall plate 2 to increase the preload between the fastener 4 and the Hall plate 2.

[0044] 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 mounting structure for a Hall plate of a brushless motor, characterized in that, include: A wire frame (1), comprising a frame body and a plurality of circumferentially distributed limiting units disposed on one end face of the frame body, wherein the limiting unit comprises a first positioning block (11) and a second positioning block (12), the first positioning block (11) having a first mounting hole (111), and the second positioning block (12) having an outwardly extending positioning post (121); and Hall plate (2) is connected to wire frame (1). Hall plate (2) includes main body (21) and at least two connecting parts (22) extending outward from one side of main body (21). The connecting parts (22) are provided with a second mounting hole (221) and a third mounting hole (222). The second mounting hole (221) is provided with a fastener (4). One end of the fastener (4) is connected to the first mounting hole (111). The third mounting hole (222) is engaged with the positioning post (121).

2. The mounting structure of the brushless motor Hall plate according to claim 1, characterized in that, An insert (5) is provided in the first mounting hole (111), and the insert (5) has a threaded hole for threaded connection of one end of the fastener (4).

3. The mounting structure of the brushless motor Hall plate (2) according to claim 2, characterized in that, The insert (5) is a copper insert.

4. The mounting structure of the brushless motor Hall plate according to claim 1 or 2, characterized in that, The fastener (4) includes: The end (41) can abut against the end face of the Hall plate (2); and A column, connected to an end (41) and extending toward the limiting unit, the column including an optical axis segment (42) connected to one side of the end (41) and a threaded segment (43) connected to the optical axis segment (42). The optical axis segment (42) is rotatably connected to the second mounting hole (221), and the threaded segment (43) is threadedly connected to the first mounting hole (111).

5. The mounting structure of the brushless motor Hall plate according to claim 4, characterized in that, The optical axis segment (42) and the threaded segment (43) are stepped segments, and the diameter of the optical axis segment (42) is larger than the diameter of the threaded segment (43). The two form a shoulder at the connection point, and the shoulder abuts against the end face of the first positioning block (11).

6. The mounting structure of the brushless motor Hall plate according to claim 5, characterized in that, An adjustment shim (6) is also provided between the end (41) and the end face of the Hall plate (2).

7. The mounting structure of the brushless motor Hall plate according to claim 1, characterized in that, The first positioning block (11) and the second positioning block (12) have a gap to form a clearance groove (13), and the connecting part (22) has a clearance hole (223) that communicates with the clearance groove (13).

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