Brushless direct current motor based on plastic packaging process

Abstract

The invention provides a brushless direct current motor based on a plastic packaging technology, and relates to the technical field of plastic packaging motors, and the brushless direct current motor comprises a mounting member, when the motor is used, a rotor drives a rotating member to rotate, the rotor pushes a movable plate to reciprocate towards two sides in the rotating process, and when the movable plate moves to the position of the outermost edge of a fixed plate, the movable plate moves to the outermost edge of the fixed plate; when the rotor rotates, the ventilation grooves in the movable plate communicate with the communicating grooves, so that heat in the shell can be conveniently dissipated through the ventilation grooves, and when the rotor stops rotating, the movable plate moves to the middle of the fixed plate and shields the communicating grooves, so that dust or impurities are prevented from entering the shell through the communicating grooves; the invention relates to a plastic package motor, in particular to a plastic package motor, and solves the problems that the plastic package motor is poor in heat dissipation due to the good sealing property, and heat dissipation holes are formed in a top shell to ensure the heat dissipation of some plastic package motors, but some dust and other impurities can enter the motor due to the heat dissipation holes, so that the service life of the plastic package motor is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic-sealed motors, and in particular to a brushless DC motor based on a plastic-sealed process. Background Art

[0002] Traditional motors are usually encapsulated in metal casings. However, this structure has some shortcomings. The metal casing is prone to rust, affecting the appearance and service life of the motor. In addition, the production cost of the metal casing is relatively high. With the continuous development of science and technology, higher requirements are placed on the performance, reliability, cost, etc. of the motor. Therefore, in some usage scenarios, plastic-encapsulated motors are gradually replacing metal-cased motors.

[0003] For example, a plastic-encapsulated fan motor structure disclosed in application number: CN202211097710.1 includes a housing, a front cover, a rear cover, a connecting rod, a drive assembly, a gear box and screws, and the drive assembly includes: a stator assembly, and the stator assembly includes a stator core, an upper insulating frame, a lower insulating frame, a pin, a PCB board and an enameled wire winding rotor assembly. The plastic-encapsulated fan motor structure has a cylindrical stator core and is formed by one-time stamping, without the need to weld into a circle, which not only reduces the manufacturing process, but also improves the inner circle accuracy. The pin is inserted into the upper insulating frame at one time through the equipment, and then the enameled wire winding is wound on the wire slot of the stator core, the wire head and the wire tail are wrapped around the pin, and the power cord is welded together through the PCB board and the pin, so that the overall structure of the stator assembly is simple, and most of the processes can be assembled by automatic equipment, eliminating multiple manual assembly processes, reducing labor costs, and reducing manufacturing processes, improving production efficiency.

[0004] However, there are some shortcomings in the current design of plastic-sealed motors. First, the top shell of the plastic-sealed motor is usually fixed by snapping together with a slot. Therefore, after long-term use, the top shell is prone to peeling off and cannot be firmly fixed on the plastic-sealed motor. Secondly, due to the good sealing characteristics of the plastic-sealed motor, its heat dissipation is poor. However, some plastic-sealed motors have heat dissipation holes on the top shell to ensure heat dissipation. However, the opening of the heat dissipation holes will cause some dust and other impurities to enter the interior of the motor, thereby affecting the practical life of the plastic-sealed motor. Summary of the invention

[0005] In response to the above problems, one purpose of the present application is to remedy these shortcomings, and more specifically to provide a brushless DC motor based on a plastic encapsulation process, which can prevent the top shell of the plastic encapsulated motor from peeling off after long-term use, improve the problem of poor heat dissipation of the plastic encapsulated motor, and at the same time prevent dust from entering the interior of the plastic encapsulated motor.

[0006] In a first aspect of the present disclosure, a brushless DC motor based on a plastic encapsulation process is provided, specifically comprising: a mounting component; the mounting component comprises a shell and a bottom shell, a circular groove is provided inside the shell, and a circular through hole is provided at the bottom of the circular groove; the bottom shell is inserted into the circular through hole on the bottom side of the shell; a sealing component is provided on the mounting component, a sealing plate of the sealing component is buckled on the upper end of the shell, a lower end of the sealing plate is inserted into the top inner end of the shell, the sealing plate is in contact with the top plate at the outer end of the shell, and the side plate at the outer end of the sealing plate is engaged with the docking groove on the outer end sleeve ring of the shell, the top cover in the sealing plate is rotatably matched with the rotor inside the shell, the rotating part on the top cover is penetrated by the rotor, and the protrusion in the rotating part is engaged with the linkage groove at the outer end of the rotor; a movable component is provided on the sealing component, a fixed plate of the movable component is provided at the upper end of the sealing plate, and the fixed plate is penetrated by the rotor, the connecting groove in the fixed plate is connected with the heat dissipation hole in the sealing plate, and the movable plate at the outer end of the fixed plate is against the rotating part.

[0007] Preferably, the mounting component comprises: an inner groove and a stator; the inner groove is opened in the inner wall of the shell, and the inner groove is connected with the circular groove in the shell through a rectangular through groove; the stator is embedded in the inner groove.

[0008] Preferably, the mounting component includes: a slide groove and a top plate; the slide groove is symmetrically opened on both sides of the upper end of the shell; the top plate is arranged at the upper end of the shell, and the two sides of the top plate are slidably matched with the slide groove through elastic parts, and a circular through groove is opened in the middle of the top plate.

[0009] Preferably, the mounting component comprises: a collar and a docking groove; the collar is sleeved on the outer end of the shell; the docking groove is arranged inside both ends of the collar, and the docking groove passes through the side end of the collar.

[0010] Preferably, the mounting component comprises: a rotor and a linkage groove; the rotor is arranged on the inner side of the shell, and the lower end of the rotor is rotatably matched with the bottom shell; the linkage groove is opened on both sides of the upper end of the rotor.

[0011] Preferably, the sealing component comprises: a sealing plate, heat dissipation holes and side plates; a circular through hole is opened in the middle of the sealing plate; the heat dissipation holes are symmetrically opened at the inner ends of both sides of the sealing plate; and the side plates are arranged on both sides of the outside of the sealing plate.

[0012] Preferably, the sealing component includes: a top cover and a rotating member; the top cover is arranged on the inner side of the shell, and the top cover passes through the circular through hole in the sealing plate; the rotating member is rotatably mounted on the upper end of the top cover, and the outer end of the rotating member is an elliptical structure.

[0013] Preferably, the movable component comprises: a fixed plate and a connecting groove; the fixed plate is a rectangular structure, and a rectangular connecting groove is provided in the middle of the fixed plate; the connecting groove is symmetrically provided at the inner ends of both sides of the fixed plate.

[0014] Preferably, the movable component comprises: a movable plate and a ventilation groove; the movable plate is slidably mounted on the upper ends of both sides of the fixed plate through elastic members, and a rectangular block is provided on the top side of the movable plate; the ventilation groove is opened inside the movable plate.

[0015] The present invention provides a brushless DC motor based on a plastic packaging process, which has the following beneficial effects:

[0016] 1. The present invention provides a sealing component and a movable component, and a fixed plate is fixedly installed on the sealing plate at the upper end of the shell, and arc-shaped connecting grooves are provided on both sides of the fixed plate, so that the connecting grooves are connected with the heat dissipation holes on the sealing grooves, and the movable plate is slidably installed on both sides of the top of the fixed plate through an elastic member, so that the movable plate is located at both ends of the rotating member, and the movable plate is against the rotating member. When the device is in use, the rotor drives the rotating member to rotate, and during the rotation process, the rotor pushes the movable plate to move back and forth to both sides. Whenever the movable plate moves to the position at the edge of the fixed plate, the air permeable groove on the movable plate will be connected with the connecting groove, so that the heat inside the shell can be dissipated through the air permeable groove. When the rotor stops, the movable plate will move to the middle of the fixed plate and block the connecting groove, so as to prevent dust or impurities from entering the shell through the connecting groove.

[0017] 2. The present invention provides a mounting component and a sealing component, a group of collars are sleeved on the outer end of the shell, and docking grooves are provided on both sides of the collars, and slide grooves are provided on both sides of the upper end of the shell, and the top plate is slidably installed to the upper end of the shell through the slide grooves, and rectangular side plates are provided on both sides of the sealing plate. When in use, the lower end of the sealing plate is inserted into the top of the shell so that the sealing plate is against the top plate, and then the sealing plate is rotated so that the side plates at both ends are engaged in the docking grooves, and the sealing plate is loosened so that the side plates are engaged to the uppermost end of the docking grooves, so that the sealing plate can be fixed on the upper end of the shell, and due to the restriction of the docking groove on the side plate, the sealing plate can be prevented from being easily detached from the shell after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings will provide a better understanding of the present disclosure and more clearly demonstrate the advantages of the present disclosure. The drawings described herein are for illustrative purposes only of selected embodiments, not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0019] In the attached picture:

[0020] Figure 1 A schematic diagram of a three-dimensional structure according to an embodiment of the present invention is shown.

[0021] Figure 2 An exploded view of an embodiment according to the present invention is shown.

[0022] Figure 3A schematic plan cross-sectional structure diagram according to an embodiment of the present invention is shown.

[0023] Figure 4 A schematic diagram of a top connection structure according to an embodiment of the present invention is shown.

[0024] Figure 5 The embodiment according to the present invention is shown. Figure 4 The schematic diagram of the enlarged structure of part A is presented.

[0025] Figure 6 A schematic cross-sectional structure diagram of a mounting component and a sealing component according to an embodiment of the present invention is shown.

[0026] Figure 7 A schematic diagram of the connection structure of the mounting component and the sealing component according to an embodiment of the present invention is shown.

[0027] Figure 8 A schematic cross-sectional structure diagram of an installation component according to an embodiment of the present invention is shown.

[0028] Fig. 9 A schematic diagram of the three-dimensional structure of a mounting component according to an embodiment of the present invention is shown.

[0029] Fig.10 A schematic diagram of the internal structure of a mounting component according to an embodiment of the present invention is shown.

[0030] Reference numerals list

[0031] 1. Install components;

[0032] 101, housing; 1011, bottom housing;

[0033] 102, inner slot; 1021, stator;

[0034] 103, chute; 1031, top plate;

[0035] 104, collar; 1041, docking groove;

[0036] 105, rotor; 1051, linkage slot;

[0037] 2. Sealing components;

[0038] 201, sealing plate; 2011, heat dissipation hole; 2012, side plate;

[0039] 202, top cover; 2021, rotating part;

[0040] 3. Active components;

[0041] 301, fixing plate; 3011, connecting groove;

[0042] 302, movable plate; 3021, ventilation groove. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1: Please refer to Figures 1 to 10 As shown:

[0045] The present invention provides a brushless DC motor based on a plastic packaging process, comprising: a mounting component 1; the mounting component 1 comprises a housing 101 and a bottom housing 1011, a circular groove is provided inside the housing 101, and a circular through hole is provided at the bottom of the circular groove; the bottom housing 1011 is plugged into the circular through hole on the bottom side of the housing 101; a sealing component 2 is provided on the mounting component 1, a sealing plate 201 of the sealing component 2 is buckled on the upper end of the housing 101, the lower end of the sealing plate 201 is inserted into the top inner end of the housing 101, the sealing plate 201 is in contact with a top plate 1031 at the outer end of the housing 101, and a side plate 2012 at the outer end of the sealing plate 201 is in contact with a sleeve ring 101 at the outer end of the housing 101. 4 is engaged with the docking groove 1041 on the sealing plate 201, the top cover 202 in the sealing plate 201 is rotatably matched with the rotor 105 inside the shell 101, the rotating member 2021 on the top cover 202 is penetrated by the rotor 105, and the protrusion in the rotating member 2021 is plugged into the linkage groove 1051 at the outer end of the rotor 105; a movable member 3 is provided on the sealing member 2, the fixed plate 301 of the movable member 3 is provided at the upper end of the sealing plate 201, and the fixed plate 301 is penetrated by the rotor 105, the connecting groove 3011 in the fixed plate 301 is connected with the heat dissipation hole 2011 in the sealing plate 201, and the movable plate 302 at the outer end of the fixed plate 301 is against the rotating member 2021.

[0046] As the second embodiment of the present application, based on the first embodiment, Figures 6 to 10As shown, the mounting member 1 comprises: an inner groove 102 and a stator 1021; the inner groove 102 is provided in the inner wall of the housing 101, and the inner groove 102 is connected with the circular groove in the housing 101 through a rectangular through groove; the stator 1021 is embedded in the inner groove 102; a slide groove 103 and a top plate 1031; the slide groove 103 is symmetrically provided on both sides of the upper end of the housing 101; the top plate 1031 is provided at the upper end of the housing 101, and both sides of the top plate 1031 are slidably matched with the slide groove 103 through elastic members , and a circular through groove is opened in the middle of the top plate 1031; the collar 104 and the docking groove 1041; the collar 104 is sleeved on the outer end of the shell 101; the docking groove 1041 is opened inside the two ends of the collar 104, and the docking groove 1041 passes through the side end of the collar 104; the rotor 105 and the linkage groove 1051; the rotor 105 is arranged on the inner side of the shell 101, and the lower end of the rotor 105 is rotatably matched with the bottom shell 1011; the linkage groove 1051 is opened on both sides of the upper end of the rotor 105.

[0047] The present application provides a cylindrical shell 101, so that the rotor 105 can be installed inside the shell 101; a circular bottom shell 1011 is provided, and the rotor 105 can be rotatably connected in the shell 101 by rotating the bottom shell 1011; an inner groove 102 is provided, so that the stator 1021 can be encapsulated into the inside of the shell 101 through the inner groove 102; a stator 1021 is provided, and the rotor 105 can be rotated inside the shell 101 by being used in conjunction with the rotor 105; a rectangular slide groove 103 is provided, and the top plate 1031 can be movably installed at the upper end of the shell 101 by slidingly matching the top plate 1031 with the slide groove 103; an annular top plate 1031 is provided, and the top plate 1031 is pressed against the top plate 1031 to rotate. The sealing plate 201 is placed on the sealing plate 201, so that the side plates 2012 on both sides of the sealing plate 201 can be tightened on the upper end of the docking groove 1041; a collar 104 is provided, and docking grooves 1041 can be provided at both ends of the collar 104; an L-shaped docking groove 1041 is provided, and the sealing plate 201 can be fixed on the upper end of the shell 101 by engaging the side plates 2012 at the uppermost position of the docking groove 1041; a rotor 105 is provided, and by rotating the rotor 105, an object fixed on the fixed shaft at the top of the rotor 105 can be driven to rotate; a linkage groove 1051 is provided, and by plugging the protrusion in the rotating member 2021 into the linkage groove 1051, the rotating member 2021 can be driven to rotate on the upper end of the top cover 202 when the rotor 105 rotates.

[0048] As the third embodiment of the present application, based on the first embodiment, Figures 4 to 7As shown, the sealing component 2 includes: a sealing plate 201, a heat dissipation hole 2011 and a side plate 2012; a circular through hole is opened in the middle of the sealing plate 201; the heat dissipation holes 2011 are symmetrically opened at the inner ends of both sides of the sealing plate 201; the side plates 2012 are arranged on both sides of the outside of the sealing plate 201; a top cover 202 and a rotating member 2021; the top cover 202 is arranged on the inner side of the shell 101, and the top cover 202 passes through the circular through hole in the sealing plate 201; the rotating member 2021 is rotatably installed on the upper end of the top cover 202, and the outer end of the rotating member 2021 is an elliptical structure.

[0049] The present application sets a circular sealing plate 201, and by snapping the sealing plate 201 onto the upper end of the shell 101, the shell 101 can be sealed; an arc-shaped heat dissipation hole 2011 is set, and the heat dissipation inside the shell 101 can be achieved through the heat dissipation hole 2011; a rectangular side plate 2012 is set, and by snapping the side plate 2012 with the docking groove 1041, the sealing plate 201 can be installed and fixed on the upper end of the shell 101; a circular top cover 202 is set, and by rotating the rotor 105 and the top cover 202, the rotor 105 can be rotatably installed in the shell 101; an elliptical rotating member 2021 is set, and the rotating member 2021 is plugged into the top of the rotor 105, so that when the rotor 105 rotates, the rotating member 2021 can push the movable plate 302 to slide back and forth on the fixed plate 301.

[0050] As the fourth embodiment of the present application, based on the first embodiment, Figure 4 and 5 As shown, the movable component 3 includes: a fixed plate 301 and a connecting groove 3011; the fixed plate 301 is a rectangular structure, and a rectangular through groove is opened in the middle of the fixed plate 301; the connecting groove 3011 is symmetrically opened at the inner ends of both sides of the fixed plate 301; a movable plate 302 and a ventilation groove 3021; ​​the movable plate 302 is slidably installed on the upper ends of both sides of the fixed plate 301 through elastic parts, and a rectangular block is provided at the top side end of the movable plate 302; the ventilation groove 3021 is opened inside the movable plate 302.

[0051] The present application sets a rectangular fixed plate 301, and two sets of movable plates 302 can be installed on the upper end of the sealing plate 201 through the fixed plate 301; sets an arc-shaped connecting groove 3011, and connects the connecting groove 3011 with the heat dissipation hole 2011, so that the heat inside the shell 101 can be dissipated through the connecting groove 3011; sets a rectangular movable plate 302, and when the present device is not in a working state, the movable plate 302 can cover the heat dissipation hole 2011 to prevent dust and other debris from entering; sets an arc-shaped ventilation groove 3021, and connects the ventilation groove 3021 with the connecting groove 3011, so as to achieve heat dissipation in the shell 101.

[0052] The specific usage and function of this embodiment are as follows:

[0053] In the present invention, Figures 1 to 10 As shown, the stator 1021 is packaged into the inner groove 102 in the housing 101, and then the bottom shell 1011 is inserted into the circular through hole at the bottom of the housing 101, the rotor 105 is placed inside the housing 101, and the rotor 105 is rotatably connected to the bottom shell 1011, the collar 104 is fitted to the outer end of the housing 101, and the two ends of the collar 104 extend from the upper end of the housing 101, and the top plate 1031 is slidably installed to the upper end of the housing 101 through the slide groove 103, and the top cover is 202 is installed in the sealing plate 201, and the rotating member 2021 is rotated and installed on the upper end of the top cover 202, and the sealing plate 201 is installed on the upper end of the housing 101, so that the rotor 105 passes through the rotating member 2021, and the bottom of the sealing plate 201 is pressed against the top plate 1031, and then the bottom is inserted into the housing 101, and the sealing plate 201 is rotated to insert the side plates 2012 at both ends into the docking grooves 1041 in the collar 104, and then the sealing plate 201 is loosened, so that the side plates 20 12 is pressed tightly in the docking groove 1041, the fixed plate 301 is installed on the upper end of the sealing plate 201, and the movable plates 302 are slidably arranged on both sides of the fixed plate 301, and the movable plates 302 are pressed against the rotating member 2021. When the rotor 105 rotates, the rotating member 2021 is driven to rotate. The rotating member 2021 can push the movable plate 302 to move back and forth on the fixed plate 301. During the movement of the movable plate 302, the venting groove 3021 will contact with the connecting groove 3021. 011 are connected, so that the heat dissipation inside the shell 101 can be achieved. When the inside of the device needs to be disassembled and repaired, the sealing plate 201 is pressed downward, and the side plate 2012 is pushed to the lowest side of the docking groove 1041, and then the sealing plate 201 is rotated to move the side plate 2012 out of the docking groove 1041, and the top plate 1031 pushes the sealing plate 201 to detach from the shell 101, so that the device can be quickly disassembled to facilitate the inspection of the inside of the shell 101.

[0054] In this article, there are a few points to note:

[0055] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0056] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0057] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. Brushless DC motor based on plastic packaging technology, including: The mounting component (1) comprises a shell (101) and a bottom shell (1011); a circular groove is provided inside the shell (101), and a circular through hole is provided at the bottom of the circular groove; the bottom shell (1011) is inserted into the circular through hole on the bottom side of the shell (101); the mounting component (1) is characterized in that a sealing component (2) is provided on the mounting component (1); a sealing plate (201) of the sealing component (2) is buckled on the upper end of the shell (101), the lower end of the sealing plate (201) is inserted into the top inner end of the shell (101), the sealing plate (201) is in contact with the top plate (1031) at the outer end of the shell (101), and the side plate (2012) at the outer end of the sealing plate (201) is in contact with the docking groove (1031) on the outer end ring (104) of the shell (101). 41), the top cover (202) in the sealing plate (201) is rotatably matched with the rotor (105) in the housing (101), the rotating member (2021) on the top cover (202) is penetrated by the rotor (105), and the protrusion in the rotating member (2021) is plugged into the linkage groove (1051) at the outer end of the rotor (105); the sealing member (2) is provided with a movable member (3), the fixed plate (301) of the movable member (3) is provided at the upper end of the sealing plate (201), the fixed plate (301) is penetrated by the rotor (105), the connecting groove (3011) in the fixed plate (301) is connected with the heat dissipation hole (2011) in the sealing plate (201), and the movable plate (302) at the outer end of the fixed plate (301) is against the rotating member (2021).

2. The brushless DC motor based on plastic packaging technology according to claim 1, characterized in that: The mounting component (1) comprises: an inner groove (102) and a stator (1021); the inner groove (102) is opened in the inner wall of the housing (101), and the inner groove (102) is connected to the circular groove in the housing (101) through a rectangular through groove; and the stator (1021) is embedded in the inner groove (102).

3. The brushless DC motor based on plastic packaging technology according to claim 2, characterized in that: The mounting component (1) comprises: a slide groove (103) and a top plate (1031); the slide groove (103) is symmetrically arranged on both sides of the upper end of the shell (101); the top plate (1031) is arranged at the upper end of the shell (101), and both sides of the top plate (1031) are slidably matched with the slide groove (103) through elastic parts, and a circular through groove is arranged in the middle of the top plate (1031).

4. The brushless DC motor based on plastic packaging technology according to claim 3 is characterized in that: The mounting component (1) comprises: a collar (104) and a docking groove (1041); the collar (104) is sleeved on the outer end of the housing (101); the docking groove (1041) is provided inside both ends of the collar (104), and the docking groove (1041) penetrates the side end of the collar (104).

5. The brushless DC motor based on plastic packaging technology according to claim 4 is characterized in that: The mounting component (1) comprises: a rotor (105) and a linkage groove (1051); the rotor (105) is arranged on the inner side of the housing (101), and the lower end of the rotor (105) is rotatably matched with the bottom shell (1011); and the linkage groove (1051) is provided on both sides of the upper end of the rotor (105).

6. The brushless DC motor based on plastic packaging technology according to claim 1, characterized in that: The sealing component (2) comprises: a sealing plate (201), a heat dissipation hole (2011) and a side plate (2012); a circular through hole is provided in the middle of the sealing plate (201); the heat dissipation hole (2011) is symmetrically provided at the inner ends of both sides of the sealing plate (201); and the side plates (2012) are provided at both sides of the outside of the sealing plate (201).

7. The brushless DC motor based on plastic packaging technology according to claim 6, characterized in that: The sealing component (2) comprises: a top cover (202) and a rotating member (2021); the top cover (202) is arranged on the inner side of the shell (101), and the top cover (202) passes through a circular through hole in the sealing plate (201); the rotating member (2021) is rotatably mounted on the upper end of the top cover (202), and the outer end of the rotating member (2021) is an elliptical structure.

8. The brushless DC motor based on plastic packaging technology according to claim 1, characterized in that: The movable component (3) comprises: a fixed plate (301) and a connecting groove (3011); the fixed plate (301) is a rectangular structure, and a rectangular through groove is provided in the middle of the fixed plate (301); the connecting groove (3011) is symmetrically provided at the inner ends of both sides of the fixed plate (301).

9. The brushless DC motor based on plastic packaging technology according to claim 8, characterized in that: The movable component (3) comprises: a movable plate (302) and a ventilation groove (3021); the movable plate (302) is slidably mounted on the upper ends of both sides of the fixed plate (301) via elastic members, and a rectangular block is provided at the top side end of the movable plate (302); the ventilation groove (3021) is opened inside the movable plate (302).

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