Brushless motor control panel mounting structure and sewage pump comprising same
By designing the limiting assembly and track structure in the brushless motor, the problem of difficulty in installing the control board is solved, and the stable fixation of the control board and enameled wire is achieved, ensuring the stability of the motor speed and the accuracy of the signal.
Patent Information
- Application Number
- CN202421401916.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The control board in existing brushless motors is difficult to install, which leads to inaccurate signal reception by the electric controller, affecting the stability of the motor speed.
A brushless motor control board installation structure is adopted, in which the coil frame has a limiting assembly extending in the direction of the control board, and a track is provided on the control board for positioning the enameled wire, and the limiting assembly and track are designed to stabilize and fix the control board and enameled wire.
It realizes simple and fast installation of the control board and enameled wire, improves installation stability, avoids the problem of pin skew, and ensures the parallelism and detection effect of the Hall sensor.
Smart Images
Figure CN222735971U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of household appliances, in particular to a brushless motor control board mounting structure and a sewage pump comprising the same, which are mainly used in household appliances. Background Art
[0002] At present, the brushless motors used in the field of household appliances use an internally mounted control board (PCB). In order to detect the rotor position, the control board of the brushless motor will use three Hall sensors perpendicular to the control board. The conventional structure of the internally mounted control board (PCB) includes three parts, namely the coil frame, the pin, and the control board.
[0003] There are two main ways to connect the control board to the winding of the coil frame. The first is to connect the control board to the winding through the pin. Before installation, the enameled wire needs to be wrapped around the pin and soldered with an electric soldering iron. The control board is soldered to the pin. The control board (PCB) needs to be soldered to the pin and the height and level of the control board need to be fixed with special tooling. The high temperature of soldering will soften the coil frame and cause the pin to be crooked, making it difficult to install the control board. In addition, it will cause the control board to be skewed, which will cause the Hall sensor to be skewed. The Hall sensor measures the position of the rotor by detecting the magnetic field changes of the magnetic ring. The skew affects the detection effect, causing the electric controller to receive inaccurate signals, resulting in abnormal motor speed or no rotation.
[0004] The second connection method is to weld the winding directly to the control board. This method often leaves a round hole on the control board, and the lead end of the winding passes through the round hole and is welded to the control board. However, processing the round hole on the control board will affect the structural strength of the control board. In addition, since the lead end is not pre-fixed, it needs to be manually pulled before and after passing through the round hole, which is not easy to operate. The existing technology will process the clip on the coil frame to pre-fix the lead end of the winding, but it does not solve the problem of limiting after punching and the difficulty of repeated punching.
[0005] In addition, in terms of fixing the control board and the coil frame, the existing technology achieves axial and circumferential fixation through elastic clips and guide columns, but the structure of each guide column is not exactly the same, and the guide column is relatively long, which not only increases the production cost but also makes it easy to collide and break. Utility Model Content
[0006] In order to solve the technical problems of difficult control board installation and inaccurate signal reception of the electric controller in the brushless motor in the prior art, the utility model provides a brushless motor control board installation structure and a sewage pump including the same to solve the above problems.
[0007] The utility model proposes a brushless motor control board installation structure, comprising a coil assembly and a control board, wherein the coil assembly comprises a coil frame and an enameled wire wound on the coil frame, the coil frame has a plurality of limit assemblies extending toward the control board, and the limit assemblies fix the control board and the coil frame to each other; a Hall sensor perpendicular to the end face of the control board is provided on the control board.
[0008] The control board has a track extending non-linearly from the outer edge to the inside, the track passes through the upper and lower end surfaces of the control board and forms an opening at the outer edge of the control board, and the enameled wire is inserted into the track from the opening and squeezed at the end of the track.
[0009] Furthermore, the track is arc-shaped or formed by connecting at least two straight rails, and two adjacent straight rails are arranged obliquely.
[0010] Furthermore, the tracks correspond one-to-one to the lead-out ends of the enameled wires.
[0011] Furthermore, the opening width of the track is greater than the width of the end of the track.
[0012] Furthermore, the track width gradually decreases from the opening to the end of the track.
[0013] Furthermore, the limiting assembly includes a limiting column and a limiting buckle, the control plate is provided with a limiting hole for the limiting column to be inserted, the middle part of the limiting column is provided with a boss, and the control plate is axially limited between the boss and the limiting buckle.
[0014] Furthermore, each limiting column and each limiting hole have the same structure, the coil assembly and the control board are located in the motor housing, the control board is provided with an anti-idiot groove, the motor housing has a positioning boss inserted into the anti-idiot groove, and the height of the limiting column is lower than the height of the limiting buckle.
[0015] Furthermore, the fool-proof groove extends to the inner circumference of the control board.
[0016] Furthermore, the coil frame includes a plurality of inner circular baffles and outer circular baffles arranged in a circumferential array, the limiting posts and limiting buckles are arranged at the ends of the outer circular baffles, and the limiting posts and limiting buckles of the same group of limiting components are arranged on the same outer circular baffle.
[0017] The utility model also provides a sewage pump, comprising the above-mentioned brushless motor control board installation structure.
[0018] The beneficial effects of the utility model are:
[0019] (1) The utility model directly welds the control board and the enameled wire, eliminating the pin installation structure, and does not require the use of special tools for positioning. The installation is simple and fast, saving human resources. In addition, a track is set on the outer edge of the control board, and the enameled wire can be inserted from the outer edge and positioned in the track. Compared with the traditional perforation method, the welding of the enameled wire is simpler.
[0020] (2) Since the utility model adopts a structure in which the coil frame and the control board are installed in two parts, the installation stability is high and the control board is not easy to fall off after installation.
[0021] (3) The utility model sets an anti-mistake groove on the control board, which can locate the installation direction of the control board. In this way, the limit column located on the coil frame only needs to play a circumferential limit role. The length of the limit column can be shortened to avoid breakage. Each limit column can also be processed by a unified mold to reduce processing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0023] Figure 1 It is an axial cross-sectional view of a specific implementation of the sewage pump of the utility model;
[0024] Figure 2 It is a top view of the control board in the brushless motor control board installation structure described in the utility model;
[0025] Figure 3 It is a schematic diagram of the positional relationship between the Hall sensor and the rotor assembly in the utility model;
[0026] Figure 4 This is a schematic diagram after the control board and coil assembly are assembled;
[0027] Figure 5 It is a schematic diagram of the position of the enameled wire in the track;
[0028] Figure 6 It is a three-dimensional diagram of the coil skeleton of the utility model;
[0029] Figure 7 It is an enlarged schematic diagram of the limit assembly in the coil skeleton of the utility model;
[0030] Figure 8 This is an enlarged view of the matching parts of the limit assembly and the control panel;
[0031] Fig. 9 It is a three-dimensional diagram of the motor housing in the utility model.
[0032] In the figure, 1, coil assembly, 101, coil frame, 102, enameled wire, 2, control board, 3, limit assembly, 301, limit column, 3011, boss, 302, limit buckle, 4, Hall sensor, 5, track, 501, opening, 6, rotor assembly, 7, housing assembly, 701, motor housing, 702, end cover, 703, insulating cover, 8, limit hole, 9, anti-mistake groove, 10, positioning boss, 11, inner circular baffle, 12, outer circular baffle, 13, impeller assembly, 14, slot. DETAILED DESCRIPTION
[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0034] like Figure 1 As shown, the sewage pump generally includes a motor and an impeller assembly 13, the motor includes a coil assembly 1, a rotor assembly 6, a control board 2 and a housing assembly 7, the rotor assembly 6 is located in the rotor cavity of the housing assembly 7, and is used to provide rotational power for the impeller, the coil assembly 1 provides a rotating magnetic field for the rotor assembly 6, and includes a coil skeleton 101 and a stator core, the coil skeleton 101 is used to wind the enameled wire 102, and the enameled wire 102 is isolated from the stator core, the housing assembly 7 includes a motor housing 701 and end covers 702 and an insulating cover 703 installed at both ends of the motor housing 701, the impeller assembly 13 is located in the impeller cavity formed by the end cover 702 and the motor housing 701, and the control board 2 is used to control the start and stop of the motor.
[0035] The sewage pump of the utility model improves the installation structure of the control panel 2, and the specific improvements are as follows:
[0036] Embodiment 1
[0037] A brushless motor control board mounting structure includes a coil assembly 1 and a control board 2. The coil assembly 1 includes a coil frame 101 and an enameled wire 102 wound on the coil frame 101. The coil frame 101 has a plurality of limit assemblies 3 extending toward the control board 2. The limit assemblies 3 fix the control board 2 and the coil frame 101 to each other. A Hall sensor 4 is provided on the control board 2 for detecting the position of the rotor. The Hall sensor 4 is perpendicular to the end face of the control board 2, thereby ensuring that the Hall sensor 4 is parallel to the axial direction of the rotor assembly 6 (such as Figure 3 As shown). Three Hall sensors 4 are usually provided.
[0038] like Figure 2As shown, the control board 2 has a track 5 extending non-linearly from the outer edge to the inside, the track 5 passes through the upper and lower end surfaces of the control board 2 and forms an opening 501 at the outer edge of the control board 2, and the enameled wire 102 is inserted into the track 5 from the opening 501 and squeezed at the end of the track 5.
[0039] Compared with the traditional control board 2 connection structure, the utility model can achieve the fixation of the coil assembly 1 and the control board 2 in structure and the enameled wire 102 through the two parts, eliminating the need for a pin, and there is no problem of pin skewness, which can ensure the parallelism of the Hall sensor 4 and the rotor assembly 6. In addition, the setting of the track 5 allows the lead end of the enameled wire 102 to be pulled out from the outside and inserted into the track 5 through the opening 501 of the track 5. Compared with the traditional perforation installation, the staff does not need to find the hole position for the enameled wire 102 to be perforated. It only needs to directly pull out the lead end of the enameled wire 102, then slide it into the track 5, and weld it with the pad near the end of the track 5. The installation is more convenient. The squeezing of the enameled wire 102 by the end of the track 5 can prevent the enameled wire 102 from axially separating from the track 5. The non-linear track design of the track 5 can also prevent the inserted enameled wire 102 from automatically sliding to the opening 501, thereby realizing the pre-fixation of the enameled wire 102 and the track 5, without the need for real-time manual pulling.
[0040] The track 5 may be in an arc shape, or the track 5 may be formed by connecting at least two straight rails, and two adjacent straight rails are arranged at an angle, which can play a shielding role at the bend.
[0041] The enameled wire 102 has three lead-out terminals, and each track 5 can be inserted with multiple lead-out terminals. In a preferred embodiment, Figure 4 and Figure 5 As shown, three tracks 5 are arranged on the control board 2 , and the tracks 5 correspond to the lead-out ends of the enameled wires 102 one by one.
[0042] The track 5 can also be provided with a width of the opening 501 greater than the width of the end of the track 5, so as to facilitate the rapid insertion of the enameled wire 102. Preferably, the width of the track 5 gradually decreases from the opening 501 to the end of the track 5.
[0043] like Figure 6-Figure 8As shown, the limiting assembly 3 is used to achieve axial and circumferential limiting, and can be, but not limited to, the following structure: including a limiting column 301 and a limiting buckle 302, the control board 2 is provided with a limiting hole 8 for inserting the limiting column 301, the limiting buckle 302 has a certain elasticity, and the outer edge of the control board 2 is usually provided with an inwardly concave card slot 14 to facilitate the installation of the limiting buckle 302, the middle part of the limiting column 301 is provided with a convex shoulder 3011, and the control board 2 is axially limited between the convex shoulder 3011 and the limiting buckle 302. The top end of the limiting column 301 cooperates with the limiting hole 8 to achieve circumferential limiting, and the convex shoulder 3011 and the limiting buckle 302 are respectively against the two end surfaces of the control board 2 to achieve axial limiting, so that there is no need to use professional tooling to control the installation height and the level of the control board 2, so that the Hall sensor 4 can reach the best state, and the installation operation is simple.
[0044] Embodiment 2
[0045] Based on the above embodiments, Figure 2 , Figure 6 and Fig. 9 As shown, each limit column 301 has the same structure as each limit hole 8, the coil assembly 1 and the control board 2 are located in the motor housing 701, the control board 2 is provided with an anti-mistake groove 9, and the motor housing 701 has a positioning boss 10 inserted into the anti-mistake groove 9, and the anti-mistake groove 9 is to unify the stator installation position, ensure that the connection wires of different motors are all connected at the same position, and ensure the consistency of the motor. The height of the limit column 301 is lower than the height of the limit buckle 302.
[0046] Conventional brushless motors also have a solution for fixing the control board 2 and the coil assembly 1 through the limit posts 301 and the limit buckles 302, and three groups are usually arranged in the circumferential direction. However, the limit posts 301 also need to play an orientation role to prevent the control board 2 from being in the wrong position. Therefore, one of the three limit posts 301 has a different shape, and the height of the limit post 301 is higher than the height of the limit buckle 302. The limit posts 301 are first oriented and then fastened with the limit buckle 302. The limit posts 301 are easy to break, and using different molds to process the limit posts 301 will also increase the mold opening cost.
[0047] In this embodiment, orientation is achieved through the cooperation between the anti-mistake groove 9 and the positioning boss 10. At this time, the limit column 301 only needs to have a circumferential fixing function, so the shape of each limit column 301 can be the same. The limit column 301 only needs to be inserted into the limit hole 8, and the limit buckle 302 needs to extend beyond the control board 2 and then clamp the control board 2. Therefore, the height of the limit column 301 can be lower than the height of the limit buckle 302.
[0048] The center of the control board 2 has an axial hole for the rotor shaft to pass through. The anti-idiot groove 9 is located on the control board 2, preferably extending to the inner circumference of the control board 2, and cooperates with the positioning boss 10 on the motor housing 701 located at the end of the rotor cavity shell.
[0049] The coil frame 101 includes a plurality of inner circular baffles 11 and outer circular baffles 12 arranged in a circumferential array. In a further design of this embodiment, the limiting column 301 and the limiting buckle 302 are arranged at the end of the outer circular baffle 12, and the limiting column 301 and the limiting buckle 302 of the same group of limiting components 3 are arranged on the same outer circular baffle 12 (such as Figure 7 As shown). In the conventional structure, the limiting column 301 and the limiting buckle 302 are arranged separately and roughly evenly along the circumferential direction of the control board 2. In this embodiment, the limiting column 301 and the limiting buckle 302 in the same group of limiting components 3 are arranged together, which can reduce the distance between the installation points, facilitate the rapid docking of the limiting column 301 and the limiting hole 8, facilitate operation, and improve installation efficiency; and can also reduce the number of protruding columns on the coil skeleton 101.
[0050] In the description of the present invention, it is necessary to understand that the terms "center", "width", "up", "down", "inside", "outside", "axial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0051] In addition, in the description of the present invention, unless otherwise specified, “several” means two or more.
[0052] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.
[0053] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A brushless motor control board mounting structure, characterized in that: The invention comprises a coil assembly (1) and a control board (2), wherein the coil assembly (1) comprises a coil frame (101) and an enameled wire (102) wound on the coil frame (101), the coil frame (101) having a plurality of limit assemblies (3) extending in the direction of the control board (2), the limit assemblies (3) fixing the control board (2) and the coil frame (101) to each other; and a Hall sensor (4) perpendicular to the end face of the control board (2) is provided on the control board (2); The control board (2) has a track (5) extending non-linearly from the outer edge to the inside, the track (5) passes through the upper and lower end surfaces of the control board (2) and forms an opening (501) at the outer edge of the control board (2), and the enameled wire (102) is inserted into the track (5) from the opening (501) and squeezed onto the end of the track (5).
2. The brushless motor control board mounting structure according to claim 1, characterized in that: The track (5) is arc-shaped or formed by connecting at least two straight rails, and two adjacent straight rails are arranged obliquely.
3. The brushless motor control board mounting structure according to claim 1, characterized in that: The track (5) corresponds one-to-one to the lead-out end of the enameled wire (102).
4. The brushless motor control board mounting structure according to any one of claims 1 to 3, characterized in that: The width of the opening (501) of the track (5) is greater than the width of the end of the track (5).
5. The brushless motor control board mounting structure according to claim 4, characterized in that: The width of the track (5) gradually decreases from the opening (501) to the end of the track (5).
6. The brushless motor control board mounting structure according to claim 1, characterized in that: The limiting assembly (3) comprises a limiting column (301) and a limiting buckle (302); the control panel (2) has a limiting hole (8) for the limiting column (301) to be inserted; the middle of the limiting column (301) has a boss (3011); the control panel (2) is axially limited between the boss (3011) and the limiting buckle (302).
7. The brushless motor control board mounting structure according to claim 6, characterized in that: Each limiting column (301) and each limiting hole (8) have the same structure; the coil assembly (1) and the control board (2) are located in the motor housing (701); an anti-misalignment groove (9) is provided on the control board (2); the motor housing (701) has a positioning boss (10) inserted into the anti-misalignment groove (9); and the height of the limiting column (301) is lower than the height of the limiting buckle (302).
8. The brushless motor control board mounting structure according to claim 7, characterized in that: The foolproof groove (9) extends to the inner circumferential surface of the control plate (2).
9. The brushless motor control board mounting structure according to claim 6 or 7, characterized in that: The coil skeleton (101) comprises a plurality of inner circular baffles (11) and outer circular baffles (12) arranged in a circumferential array, the limiting posts (301) and the limiting buckles (302) are arranged at the ends of the outer circular baffles (12), and the limiting posts (301) and the limiting buckles (302) of the same group of limiting assemblies (3) are arranged on the same outer circular baffle (12).
10. A sewage pump, characterized in that: It comprises the brushless motor control board mounting structure as described in any one of claims 1-9.