Simple installation micro direct current brushless motor structure

Abstract

The utility model relates to a simple installation micro direct -current brushless motor structure belongs to brushless motor technical field, including motor casing, drive board and plastics piece, the plastics piece passes through the reverse buckle structure restriction drive board to pass through the reverse buckle structure and is fixed on the motor casing, so that drive board can be installed in the motor casing without screw, the utility model discloses a reverse buckle structure of plastics piece replaces traditional screw, cancels screw, gasket and other auxiliary parts, reduces the number of parts, the plastics piece of integrated injection molding is matched with drive board, casing, does not need additional processing procedure, significantly reduces manufacturing cost, and the elastic clamping hook design of plastics piece can realize the quick assembly of'presss and fixes ', and single installation time is shortened compared with traditional screw mode.

Description

Technical Field

[0001] This utility model relates to the field of brushless motor technology, and in particular to a simple installation structure for a miniature DC brushless motor. Background Technology

[0002] As electronic devices trend towards miniaturization and lightweight design, miniature brushless DC motors are widely used in medical devices, smart home appliances, drones, and other fields due to their high efficiency, low noise, and long lifespan. However, the traditional mounting structure of miniature brushless DC motors has significant drawbacks: In existing technologies, drive boards are typically fixed to the motor housing using screws or clips. However, due to size limitations, micro motors cannot accommodate traditional screw structures, necessitating external drive boards that increase overall size and wiring complexity. Screw fixing requires additional tools and precise alignment, resulting in low assembly efficiency. Traditional clip structures, on the other hand, are prone to loosening due to insufficient material rigidity, affecting motor operational stability. The use of auxiliary parts such as screws and washers not only increases material costs but also enhances the complexity of production processes, making rapid installation difficult, especially in automated assembly. Under vibration or impact conditions, traditional fixing methods can easily lead to stress concentration, causing drive boards to detach or resulting in poor circuit contact, affecting motor performance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a simple installation structure for a miniature DC brushless motor, which aims to solve the problems in the background art.

[0004] To achieve the above-mentioned utility model objectives, the first aspect of this utility model proposes a simple installation structure for a miniature DC brushless motor, including a motor housing, a drive board, and a plastic component. The plastic component restricts the drive board through an inverted buckle structure and is fixed to the motor housing through the inverted buckle structure, so that the drive board can be installed on the motor housing without screws.

[0005] Optionally, the undercut structure includes at least one hook that engages with a corresponding hole or edge on the drive plate to limit the displacement of the drive plate.

[0006] Optionally, the plastic part is made of a resilient plastic material, and the motor housing has a positioning port that matches and engages with the hook. During assembly, the plastic part engages with the positioning port of the motor housing through the elastic deformation of the hook.

[0007] Optionally, the inverted structure includes a groove on the motor housing, and the plastic part has a fastening part that cooperates with it, and positioning is achieved by the engagement of the fastening part with the groove.

[0008] Optionally, the plastic part is an integrally molded injection molded part whose shape matches the contour of the motor housing and drive plate.

[0009] Optionally, the drive board is a drive circuit board for a brushless DC motor, which integrates motor control components.

[0010] The beneficial effects of this utility model are: 1. This utility model provides a simple installation structure for a micro DC brushless motor. By replacing traditional screws with an inverted structure of plastic parts, auxiliary parts such as screws and washers are eliminated, reducing the number of parts. The integrated injection-molded plastic parts match the drive board and housing without additional processing steps, significantly reducing manufacturing costs. Furthermore, the elastic hook design of the plastic parts enables quick assembly with "press and fix", shortening the installation time per installation compared to the traditional screw method.

[0011] 2. The present invention provides a simple installation structure for a micro DC brushless motor. The compact design of the one-piece molding of plastic parts is adapted to the extremely small size limitation of micro motors, and the internal space utilization rate is increased by 30%, which provides support for the high-density component layout of the drive board. The circumferential positioning design of the groove and the fastening part ensures the positioning installation and ensures the smooth operation of the motor. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a simple-to-install miniature brushless DC motor according to the present invention; Figure 2 This is a schematic diagram of the installation of the drive board and plastic parts of a simplified installation micro DC brushless motor structure according to this utility model; Figure 3 This is a schematic diagram of the plastic component structure of a simple-to-install miniature DC brushless motor according to this utility model.

[0013] Explanation of reference numerals in the attached figures: 1. Motor housing; 11. Groove; 2. Drive board; 3. Plastic parts; 4. Hook; 5. Positioning port; 31. Fastening part.

[0014] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0015] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0016] 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, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] Reference Figures 1-3 This utility model provides an embodiment of a simple installation micro DC brushless motor structure, including a motor housing 1, a drive board 2, and a plastic part 3. The plastic part 3 restricts the drive board 2 through an inverted structure and is fixed to the motor housing 1 through the inverted structure, so that the drive board 2 can be installed on the motor housing 1 without screws.

[0018] It should be noted that the plastic part 3 is fixed to the motor housing 1 by an inverted snap-fit ​​structure, which also restricts the displacement of the drive plate 2, thus allowing the drive plate 2 to be installed on the motor housing 1 without screws. This eliminates the traditional screw fixing method, reducing the number of parts such as screws and washers, and lowering assembly complexity; it also eliminates the need for screw procurement and assembly processes, reducing production costs; and the elastic deformation of the plastic part 3 enables quick engagement without tools, significantly shortening assembly time.

[0019] The motor housing 1 is made of metal or high-strength engineering plastic, and has a stator assembly and a rotor assembly inside. The outside has a positioning port 5 or a groove 11 for mating with the plastic part 3.

[0020] The driver board 2 is a PCB circuit board that integrates control components such as Hall sensors and MOSFETs. It is embedded in the plastic part 3 through an inverted structure, without the need for additional fasteners.

[0021] The plastic part 3 is made by injection molding and is mechanically connected to the motor housing 1 and the drive plate 2 through an inverted structure.

[0022] In some embodiments, the undercut structure includes at least one hook 4, which engages with a corresponding hole or edge on the drive plate 2 to limit the displacement of the drive plate 2.

[0023] It should be noted that the cooperation between the hook 4 and the drive board 2 can effectively prevent the drive board 2 from shifting under vibration or external force, ensuring the stability of the circuit connection; and the elastic deformation of the hook 4 does not require additional machining precision, which can adapt to the compact space requirements of micro motors.

[0024] In some embodiments, the plastic part 3 is made of a resilient plastic material, and the motor housing 1 has a positioning port 5 that matches and engages with the hook 4. During assembly, the plastic part 3 engages with the positioning port 5 of the motor housing 1 through the elastic deformation of the hook 4.

[0025] It should be noted that the plastic part 3 is made of a resilient plastic material, such as ABS or POM, and the motor housing 1 has a positioning opening 5 that matches the hook 4. During assembly, the hook 4 of the plastic part 3 elastically deforms and engages with the positioning opening 5, thus fixing it to the motor housing 1. The plastic part 3 undergoes slight deformation during engagement and returns to its original shape after the external force is released, forming a stable connection; the cross-sectional shape of the positioning opening 5 matches that of the hook 4 to prevent loosening. The resilience of the elastic material allows it to withstand multiple assembly and disassembly processes, extending its service life.

[0026] In some embodiments, the inverted structure includes a groove 11 provided on the motor housing 1, and a fastening part 31 provided on the plastic part 3 to cooperate with it, and positioning is achieved by the engagement of the fastening part 31 with the groove 11.

[0027] It should be noted that the grooves 11 are distributed in a ring along the outer wall of the motor housing 1, and their depth matches the thickness of the fastening part 31; the fastening part 31 is an outwardly extending protrusion that is inserted into the grooves 11 through compression deformation during assembly. The cooperation between the grooves 11 and the fastening part 31 can simultaneously achieve axial and circumferential positioning, preventing the plastic part 3 from rotating or sliding.

[0028] In some embodiments, the plastic part 3 is an integrally molded part whose shape matches the contours of the motor housing 1 and the drive plate 2.

[0029] It should be noted that high-precision molds are used for one-piece injection molding to ensure that the structure of the plastic part 3, such as the hook 4 and the fastening part 31, matches the tolerance of the motor housing 1 and the drive plate 2.

[0030] In some embodiments, the drive board 2 is a drive circuit board for a brushless DC motor, which integrates motor control components.

[0031] It should be noted that the driver board 2 is a PCB circuit board integrating motor control components, including Hall sensors, MOSFETs, capacitors, etc. The driver board 2 is fixed inside the motor housing 1 by the inverted structure of the plastic part 3, and is connected to an external power supply or controller through leads. The driving components are arranged on the non-assembly side of the driver board 2 to avoid interference with the plastic part 3 or the motor housing 1; a heat dissipation gap is maintained between the driver board 2 and the motor housing 1, or heat dissipation is assisted by the thermally conductive material of the plastic part 3.

[0032] The integrated driver board 2 reduces signal transmission paths, lowers electromagnetic interference, and improves motor operation stability; the fixing method of the driver board 2 facilitates disassembly and replacement, reducing later maintenance costs.

[0033] In practical application, firstly, the one-piece molded plastic part 3 is aligned with the motor housing 1, and the hooks 4 on the plastic part 3 contact the positioning holes 5 or grooves 11 of the motor housing 1. By applying axial pressure, the hooks 4 undergo elastic deformation and embed into the positioning holes 5 or the fastening parts 31 and grooves 11, thus fixing the plastic part 3 to the motor housing 1. Then, the drive plate 2 is inserted into the plastic part 3. The hooks 4 engage with the holes or protrusions on the edge of the drive plate 2 to restrict the displacement of the drive plate 2, achieving installation of the drive plate 2 without screws. After assembly, the drive plate 2 is stably fixed inside the motor housing 1 by the elastic clamping action of the plastic part 3, while the resilience of the plastic part 3 ensures the durability of the fastening structure. During power-on testing, the control signal of the drive plate 2 is connected to the external circuit via leads, and the motor can then operate normally. This operation utilizes the inverted structure and elastic material properties of the plastic part 3 to achieve tool-free rapid assembly. At the same time, the cooperation of the hook 4, positioning port 5 and groove 11 ensures the stability of the drive plate 2 under vibration or external force, significantly improving the installation efficiency and structural reliability of the micro DC brushless motor.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A simple installation structure for a miniature brushless DC motor, comprising a motor housing (1), a drive board (2), and plastic parts (3), characterized in that: The plastic part (3) restricts the drive plate (2) through the inverted structure and is fixed to the motor housing (1) through the inverted structure, so that the drive plate (2) can be installed on the motor housing (1) without screws. The buckle structure includes at least one hook (4), which engages with a corresponding hole or edge on the drive plate (2) to limit the displacement of the drive plate (2).

2. The simple installation micro DC brushless motor structure according to claim 1, characterized in that, The plastic part (3) is made of a resilient plastic material, and the motor housing (1) has a positioning port (5) that matches and engages with the hook (4). During assembly, the plastic part (3) is engaged with the positioning port (5) of the motor housing (1) by the elastic deformation of the hook (4).

3. The simple installation micro DC brushless motor structure according to claim 1, characterized in that, The inverted structure includes a groove (11) provided on the motor housing (1), and a fastening part (31) provided on the plastic part (3) to cooperate with it. Positioning is achieved by the engagement of the fastening part (31) and the groove (11).

4. The simple installation structure of a miniature DC brushless motor according to claim 1, characterized in that, The plastic part (3) is an integrally molded injection part whose shape matches the contour of the motor housing (1) and the drive plate (2).

5. The simple installation structure of a miniature DC brushless motor according to claim 1, characterized in that, The drive board (2) is a drive circuit board for a brushless DC motor, which integrates motor control components.

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