A plastic-encapsulated brushless DC motor for a fan

Abstract

The present invention provides a plastic-encapsulated brushless DC motor for a fan, which relates to the field of brushless motors and includes: a support reinforcement structure; the support reinforcement structure is installed at the rear of the plastic-encapsulated brushless DC motor, the front end of the guide plate structure is an arc-shaped structure, the internal angle position of the front end of the guide plate structure is an arc-shaped structure, the guide plate structure is connected to the support head structure through an external rod structure, and the inner end of each support head structure is fixed with two cylindrical plug-in rod reinforcement structures. When fixing, the metal plug-in rod reinforcement structure is inserted into the jack of the connecting component, and is supported inside the connecting component of the plastic material to improve the strength of the connecting component. The bolt applies pressure to the metal connecting component to avoid damage or deformation of the connecting component, which solves the problem that the common plastic-encapsulated brushless DC motor for a fan has a connecting foot made of plastic material, which is easy to cause damage or deformation of the connecting foot after the fixing bolt is tightened, affecting the fixing strength.

Description

Technical Field

[0001] The invention relates to the technical field of brushless motors, and in particular to a plastic-encapsulated brushless DC motor for a fan. Background Art

[0002] The plastic-encapsulated brushless DC motor for fans is a new type of motor with a brand-new structure and high-tech content, which is based on the traditional DC motor and developed by relying on emerging electronic and digital technologies. This motor is also used in high-end DC variable-frequency air conditioners. It has the advantages of high efficiency, low noise, long life, small size, wide speed regulation range, and reliable operation.

[0003] For example, application number: CN202222491357.7 involves a brushless motor for a fan, including a motor structure, which includes a chassis assembly, a stator assembly, a cooling assembly and a protective assembly. The chassis assembly is threadedly connected to the bottom end of the stator assembly, the protective assembly is installed on the outer wall of one side of the stator assembly near the top by bolts, and the cooling assembly is installed on the outer wall of the top end of the stator assembly by bolts. The stator assembly includes a cylinder, a cavity is opened inside the cylinder, and connecting pipes extending to the inside of the cavity are inserted on both sides of the outer wall of the top of the cylinder; when the brushless motor of the utility model is operating, the cooling assembly will start, and at this time the pump body will draw the coolant inside the box into the cavity, and then cooperate with the connecting pipe and the water pipe to allow the coolant to flow back and forth between the box and the cavity, and in conjunction with the continuous cooling treatment of the refrigerator, the heat dissipation effect of the brushless motor can be improved to avoid the motor burning due to the heat not being dissipated.

[0004] Based on the above, the common plastic-encapsulated brushless DC motors for fans on the market are usually connected to the grooves of the fan blades through a pin to prevent the fan blades from sliding outside the motor shaft. After long-term use and stress, the pin is easy to loosen and slide and fall, causing the pin to be lost. At the same time, the pin is behind the fan blade, affecting the line of sight. It is more difficult to insert the pin into the fan blade groove. In addition, the common plastic-encapsulated brushless DC motors for fans only have a heat sink outside the fan cover, and the heat dissipation efficiency is poor, which affects the service life. Since the brushless DC motor is plastic-encapsulated, the connecting foot is also made of plastic. After the fixing bolts are tightened, the connecting foot is easily damaged or deformed, affecting the fixing strength. Summary of the invention

[0005] The disclosed embodiment relates to a plastic-encapsulated brushless DC motor for a fan, wherein a spring continuously pushes a force-bearing pushing rod and a positioning connecting pin. After the rotating assembly is initially inserted into the interior of a fan blade, the fan blade can be pressed to compress the force-bearing pushing rod to move the positioning connecting pin, and then the fan blade is manually controlled to rotate. When the positioning connecting pin is aligned with a groove, the spring pushes the force-bearing pushing rod and the positioning connecting pin to automatically move and automatically insert into the interior of the fan blade groove, thereby improving the positioning connection effect.

[0006] In a first aspect, the present disclosure provides a plastic-encapsulated brushless DC motor for a fan, specifically comprising: a plastic-encapsulated brushless DC motor; the front end of the plastic-encapsulated brushless DC motor is driven and connected to a rotating component, a positioning connecting pin is installed on the front end of the rotating component through a slot, a square hole for connection is provided inside the positioning connecting pin, a positioning connecting plug plate is inserted into the inside of the square hole, the positioning connecting plug plate is fixedly connected to a force-bearing pushing rod, and a force-bearing pushing rod with a circular plate on the outside is provided with a spring; an external heat dissipation component; two of the external heat dissipation components are annular structures, and the cross-section of the external heat dissipation components is an arc-shaped plate structure, the two external heat dissipation components are sleeved on the outside of the plastic-encapsulated brushless DC motor, the two external heat dissipation components are fixed with three airflow pipe components with circular tubular structures, the interior of the external heat dissipation components is connected to the interior of the airflow pipe components, and the three airflow pipe components are connected to the interior of the external heat dissipation components. The components are arranged in a ring shape and are arranged on the outside of the plastic-sealed brushless DC motor. An opening is provided on the inner side of the airflow tube component, and the opening faces the plastic-sealed brushless DC motor. The airflow tube component is connected to the skateboard component through a guide rod component. A guide component is fixed to the front end of the skateboard component, and both sides of the guide component are arc structures; a support reinforcement structure; the support reinforcement structure is installed at the rear of the plastic-sealed brushless DC motor, and the support reinforcement structure is connected to the guide plate structure through a support plate structure. There are three guide plate structures in total, and the three guide plate structures are arranged in a ring shape at the rear of the plastic-sealed brushless DC motor. The interior of the front end of the guide plate structure is an arc structure, and the internal angle position of the inner front end of the guide plate structure is an arc structure. The guide plate structure is connected to the support head structure through an outer rod structure, and the inner end of each support head structure is fixed with two cylindrical rod reinforcement structures.

[0007] In at least some embodiments, the outside of the plastic-encapsulated brushless DC motor is provided with three positioning grooves with circular groove-shaped structures, and three connecting components for fixed connection are fixed at the rear of the plastic-encapsulated brushless DC motor. The interior of the connecting components is provided with fixing holes for inserting fixing bolts, and each connecting component is provided with two sockets, and a metal rod reinforcement structure is inserted into the interior of the sockets; the front end of the rotating component is provided with a thread for connection, and the outside of the rotating component is provided with fan blades. The front end of the rotating component is penetrated by a slot with arc-shaped structures at both ends, and the positioning connecting pin is freely movable inside the slot; the rear end of the rotating component is provided with a rear slot, and the rear slot is connected to the slot through an inner circular hole, and a force-bearing push rod is inserted into the rear slot and the inner circular hole, the front end of the spring of the force-bearing push rod is in contact with the circular plate, and the rear end of the spring is in contact with the rear of the rear slot, and the force-bearing push rod and the circular plate are pulled inside the rear slot.

[0008] In at least some embodiments, three connecting components are fixed between two of the external heat dissipation components, and the three connecting components are arranged in a ring shape on the outside of the plastic-sealed brushless DC motor. A positioning component is fixed to the inner end of each connecting component, and the outer end of the positioning component is a cylindrical structure and is made of flexible rubber material, and the inner end of the positioning component is a spherical structure and is made of plastic material, and the inner end of the positioning component is embedded in the internal positioning groove for positioning and fixing; a partition component is fixed at the inner middle position of each of the airflow tube components, and a guide rod component for guiding is fixed inside the opening of the airflow tube component; a slide plate component is sleeved on the outside of the guide rod component, and the slide plate component is free to slide outside the guide rod component, the inner end of the slide plate component is a circular tubular structure, and the outer end of the slide plate component is a rectangular structure and contacts the partition plate component, the airflow tube component is plugged into the rubber rod through a groove, and the rubber rod is fixedly connected to the rear component, the front end of the rear component is a circular tubular structure, the rear end of the rear component is a rectangular tube structure, and the rear of the rear component is docked with the guide plate structure.

[0009] In at least some embodiments, three annularly arranged support plate structures are welded and fixed to the outside of the support reinforcement structure, the front ends of the support reinforcement structure and the support plate structure are fit and spliced ​​with a contact plate made of rubber material, and the front end of the contact plate is fitted with the rear of the plastic-encapsulated brushless DC motor; the two ends of the guide plate structure are fixedly connected to the outer rod structure of the arc structure, the side of the outer rod structure is fixedly connected to the support head structure of the circular structure, and the support head structure is fitted with the rear of the connecting component; there are three support head structures in total, and a circular groove is provided at the rear of each support head structure, and a ring-shaped fixed tooth structure is provided inside the groove, and the fixed tooth structure of the conical structure is made of metal, and the outer end of the fixed tooth structure protrudes from the support head structure.

[0010] The present invention provides a plastic-encapsulated brushless DC motor for a fan, which has the following beneficial effects:

[0011] After the positioning connecting pin is installed, the spring continuously pushes the round plate and the force-driven rod to move, so that the positioning connecting plug plate is continuously inserted into the square hole, thereby preventing the positioning connecting pin from being disengaged, and preventing the positioning connecting pin from being loosened, disengaged, or lost after long-term use.

[0012] Because the spring continuously pushes the force-bearing pushing rod and the positioning connecting pin, after the rotating assembly is initially inserted into the fan blade, the fan blade can be pressed to compress the force-bearing pushing rod to move the positioning connecting pin, and then the fan blade is manually controlled to rotate. When the positioning connecting pin is aligned with the groove, the spring pushes the force-bearing pushing rod and the positioning connecting pin to automatically move and automatically insert into the fan blade groove, thereby improving the positioning connection effect.

[0013] The external heat dissipation component and the airflow pipe component are installed outside the plastic-sealed brushless DC motor for use, and the airflow guide component is at the front end of the airflow pipe component and is moved and adjusted so that the airflow guide component is close to the fan blades. After the fan blades rotate, the airflow guide component intercepts the airflow and controls the airflow to enter the airflow pipe component and the internal part of the external heat dissipation component, controls the airflow to be evenly distributed outside the plastic-sealed brushless DC motor, controls the heat emitted by the plastic-sealed brushless DC motor to circulate and dissipate quickly, and improves the heat dissipation efficiency;

[0014] At the same time, the airflow pipe component transmits part of the airflow backward through the partition component and the rear component, so that the airflow changes its flow direction through the guide plate structure and blows to the rear of the plastic-sealed brushless DC motor to dissipate heat from the rear of the plastic-sealed brushless DC motor.

[0015] When the plastic-encapsulated brushless DC motor needs to be fixed, the control support reinforcement structure is spliced ​​with the plastic-encapsulated brushless DC motor, so that the metal plug-in rod reinforcement structure is inserted into the socket of the connecting component, and is supported inside the plastic connecting component to improve the strength of the connecting component. After the fixing bolts are tightened, pressure is applied to the metal connecting component to avoid direct pressure on the connecting component, which may cause damage or deformation of the connecting component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0017] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] In the attached picture:

[0019] Figure 1 A three-dimensional structural schematic diagram of the present application is shown;

[0020] Figure 2 A bottom-up structural schematic diagram of the present application is shown;

[0021] Figure 3 The exploded three-dimensional structure diagram of the present application is shown;

[0022] Figure 4 A schematic diagram of the exploded bottom-up structure of the present application is shown;

[0023] Figure 5 The schematic diagram of the exploded three-dimensional structure of the plastic-encapsulated brushless DC motor of the present application is shown;

[0024] Figure 6 A schematic diagram of the three-dimensional structure of the external heat dissipation component of the present application is shown;

[0025] Figure 7 A bottom view structural diagram of an external heat dissipation component of the present application is shown;

[0026] Figure 8 A schematic diagram of the exploded three-dimensional structure of the support reinforcement structure of the present application is shown.

[0027] Reference numerals list

[0028] 1. Plastic-encapsulated brushless DC motor; 101. Positioning slot; 102. Connecting assembly; 103. Rotating assembly; 104. Rear slot; 105. Slot; 106. Positioning connecting pin; 107. Positioning connecting plug plate; 108. Forced push rod;

[0029] 2. External heat dissipation component; 201. Connecting component; 202. Positioning component; 203. Airflow pipe component; 204. Baffle component; 205. Guide rod component; 206. Slide plate component; 207. Air guide component; 208. Rear component;

[0030] 3. Support reinforcement structure; 301. Support plate structure; 302. Contact plate; 303. Guide plate structure; 304. Outer rod structure; 305. Support head structure; 306. Insert rod reinforcement structure; 307. Fixed tooth structure. DETAILED DESCRIPTION

[0031] 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.

[0032] Example 1: Please refer to Figures 1 to 8 :

[0033] The present invention proposes a plastic-encapsulated brushless DC motor for a fan, comprising: a plastic-encapsulated brushless DC motor 1; a front end of the plastic-encapsulated brushless DC motor 1 is connected to a rotating assembly 103, a front end of the rotating assembly 103 is inserted through a slot 105 and is provided with a positioning connection pin 106, which is used to be inserted into the groove of a fan blade so that the rotating assembly 103 is positioned and connected with the fan blade, a square hole for connection is provided inside the positioning connection pin 106, a positioning connection plug plate 107 is inserted into the inside of the square hole and is positioned and plugged with the positioning connection plug pin 106, the positioning connection plug plate 107 is fixedly connected to a force-bearing push rod 108, and the force-bearing push rod 108 provided with a circular plate on the outside is provided with a spring, and the spring continuously pushes The force pushes the rod 108 and the positioning connecting pin 106 to prevent the positioning connecting pin 106 from loosening and disengaging, and at the same time continuously pushes the positioning connecting pin 106 to be inserted into the groove of the fan blade; the external heat dissipation component 2; the two external heat dissipation components 2 are annular structures, and the cross-section of the external heat dissipation component 2 is an arc-shaped plate structure, so that the airflow circulates inside it, and the airflow spreads the external heat dissipation of the plastic-sealed brushless DC motor 1. The two external heat dissipation components 2 are mounted on the outside of the plastic-sealed brushless DC motor 1. The two external heat dissipation components 2 are fixed with three airflow pipe components 203 with circular tubular structures. The interior of the external heat dissipation component 2 is connected to the interior of the airflow pipe component 203, and the three airflow pipe components 203 are in a The ring-shaped arrangement is arranged outside the plastic-sealed brushless DC motor 1, and an opening is arranged on the inner side of the airflow tube component 203, which faces the plastic-sealed brushless DC motor 1 to control the airflow to assist in circulation and heat dissipation. The airflow tube component 203 is connected to the slide plate component 206 through the guide rod component 205, and the front end of the slide plate component 206 is fixed with a guide component 207. The two sides of the guide component 207 are arc structures, close to the fan blades, to control the airflow to enter the internal circulation of the airflow tube component 203; support reinforcement structure 3; support reinforcement structure 3 is installed at the rear of the plastic-sealed brushless DC motor 1, and the support reinforcement structure 3 is connected to the guide plate structure 303 through the support plate structure 301. There are three guide plate structures 303 in total. Three guide plate structures 303 are arranged in a ring shape behind the plastic-encapsulated brushless DC motor 1. The front end of the guide plate structure 303 is an arc-shaped structure, which changes the direction of the airflow so that the airflow blows to the rear of the plastic-encapsulated brushless DC motor 1 for heat dissipation. The internal angle position of the front end of the guide plate structure 303 is an arc-shaped structure. The guide plate structure 303 is connected to the support head structure 305 through the outer rod structure 304. Two cylindrical rod reinforcement structures 306 are fixed to the inner end of each support head structure 305, which are inserted into the jack of the connecting component 102 to support the connecting component 102, improve the strength of the connecting component 102, and avoid damage or deformation of the connecting component 102 after the bolts are tightened.

[0034] In the present disclosure, Figure 4 and Figure 5As shown, the outside of the plastic-encapsulated brushless DC motor 1 is provided with three positioning grooves 101 with circular groove-shaped structures, which are used to embed the positioning component 202 and firmly install and connect the external heat dissipation component 2. Three connecting components 102 for fixed connection are fixed at the rear of the plastic-encapsulated brushless DC motor 1. The inside of the connecting component 102 is provided with a fixing hole for inserting a fixing bolt. The bolts are inserted to fix the connecting component 102 and the plastic-encapsulated brushless DC motor 1. Each connecting component 102 is provided with two jacks, and a metal rod reinforcement structure 306 is inserted into the inside of the jack to improve the strength of the connecting component 102; the front end of the rotating component 103 is provided with a thread for connection, and the outside of the rotating component 103 is sleeved with The fan blade and the front end of the rotating component 103 are penetrated by a slot 105 with arc-shaped structures at both ends, and the positioning connecting pin 106 is freely movable inside the slot 105 and automatically moves to adjust the position; the rear end of the rotating component 103 is provided with a rear slot 104, and the rear slot 104 is connected with the slot 105 through an inner circular hole, and a force-bearing push rod 108 is inserted into the rear slot 104 and the inner circular hole. The front end of the spring of the force-bearing push rod 108 contacts the circular plate, and the rear end of the spring contacts the rear of the rear slot 104. The spring is forced to continuously push the force-bearing push rod 108 to displace, so that the positioning connecting plug plate 107 is continuously inserted into the square slot and fixed, and the force-bearing push rod 108 and the circular plate are pulled inside the rear slot 104.

[0035] In the present disclosure, Figure 6 and Figure 7As shown, three connecting components 201 are fixed between the two external heat dissipation components 2. The three connecting components 201 are arranged in a ring shape on the outside of the plastic-sealed brushless DC motor 1 and are used to connect with the positioning component 202. A positioning component 202 is fixed to the inner end of each connecting component 201. The outer end of the positioning component 202 is a cylindrical structure and is made of flexible rubber material. With the help of elastic adaptive deformation, the inner end of the positioning component 202 is a spherical structure and is made of plastic material. The inner end of the positioning component 202 is embedded in the internal positioning groove 101 for positioning and fixing, driving the external heat dissipation component 2 to be positioned, installed and used; a partition component 204 is fixed at the inner middle position of each airflow pipe component 203 to divert the airflow entering the airflow pipe component 203, so that a part of the airflow is blown to the plastic-sealed brushless DC motor 1 through the opening of the airflow pipe component 203 for heat dissipation, and the other part of the airflow is discharged through the rear component 208, and then passes through the guide plate The structure 303 makes the airflow blow to the rear of the plastic-sealed brushless DC motor 1 for heat dissipation. A guide rod component 205 for guiding is fixed inside the opening of the airflow tube component 203 to control the sliding displacement of the slide plate component 206. The slide plate component 206 is sleeved on the outside of the guide rod component 205, and the slide plate component 206 is freely sliding outside the guide rod component 205. The inner end of the slide plate component 206 is a circular tubular structure, which drives the rear component 208 to move together. The outer end of the slide plate component 206 is a rectangular structure and contacts with the partition component 204. The airflow tube component 203 is plugged with the rubber rod through a groove, and the rubber rod is fixedly connected to the rear component 208. The front end of the rear component 208 is a circular tubular structure, and the rear end of the rear component 208 is a rectangular tube structure. The rear of the rear component 208 is connected with the guide plate structure 303. The rear component 208 converges the airflow and blows it to the guide plate structure 303, and then controls the airflow to change the flow direction.

[0036] In the present disclosure, Figure 3 and Figure 8As shown, the outside of the support reinforcement structure 3 is welded and fixed with three annularly arranged support plate structures 301, which are used to support the guide plate structure 303. The front ends of the support reinforcement structure 3 and the support plate structure 301 are fitted and spliced ​​with the contact plate 302 made of rubber material. The front end of the contact plate 302 is fitted with the rear of the plastic-sealed brushless DC motor 1 to support the plastic-sealed brushless DC motor 1 and improve the stability of the plastic-sealed brushless DC motor 1. The two ends of the guide plate structure 303 are fixedly connected to the outer rod structure 304 of the arc structure, and are supported by the outer rod structure 304. The side of the outer rod structure 304 is fixedly connected to the support head structure 305 of the circular structure to support The head structure 305 fits with the rear of the connecting component 102, thereby improving the strength of the connecting component 102 and the supporting effect, while preventing the rear of the plastic-sealed brushless DC motor 1 from fitting with the installation position, thereby affecting the heat dissipation of the rear of the plastic-sealed brushless DC motor 1; there are three supporting head structures 305 in total, and each supporting head structure 305 is provided with a circular groove at the rear, and a ring-shaped fixed tooth structure 307 is arranged inside the groove. The conical fixed tooth structure 307 is made of metal, and the outer end of the fixed tooth structure 307 protrudes from the supporting head structure 305, so that the fixed tooth structure 307 is in anti-slip contact with the installation position, thereby improving the fixing effect and avoiding loosening.

[0037] Embodiment 2, based on embodiment 1, as Figure 3-Figure 4 As shown, if there is no need to improve the heat dissipation strength, the external heat dissipation component 2 can be pulled to move before the plastic-encapsulated brushless DC motor 1 is installed, so that the positioning component 202 is disengaged from the inside of the positioning groove 101, so that the external heat dissipation component 2 can be easily removed.

[0038] The working principle of this embodiment is as follows: first, use a sharp tool such as a screwdriver to insert it into the rear slot 104, pull the circular plate and the force-pushing rod 108 to move, compress the spring, control the positioning connection pin 106 to insert into the slot 105, stop pulling the force-pushing rod 108, the spring pushes the force-pushing rod 108 to move, the force-pushing rod 108 drives the positioning connection plug plate 107 to move, the positioning connection plug plate 107 is inserted into the square hole of the positioning connection plug pin 106, the positioning connection plug pin 106 is firmly fixed, and the external heat dissipation component 2 and the airflow pipe component 203 are controlled to be mounted on the plastic-sealed brushless The outside of the DC motor 1 is used to insert the positioning component 202 into the positioning groove 101, and then the guide component 207 is pulled to adjust the use position through the slide plate component 206, and then the support reinforcement structure 3 is controlled to be spliced ​​with the contact plate 302, and the support reinforcement structure 3 is controlled to be installed behind the plastic-encapsulated brushless DC motor 1, and the rod reinforcement structure 306 is controlled to be inserted into the jack of the connecting component 102, and the plastic-encapsulated brushless DC motor 1 is controlled to be placed in the installation position, and the fixing bolts are controlled to be inserted into the connecting component 102 and the supporting head structure 305 at the same time, and the fixing bolts are controlled to be tightened to squeeze the connecting component 102, and at the same time, the rod reinforcement structure 306 is in the internal support of the connection component 102 to improve the strength of the connection component 102, avoid tightening the fixing bolts, and affect the fixing effect of the connection component 102, and then control the fan blade installation, so that the rotating component 103 is inserted into the inside of the fan blade, and at the same time, the fan blade compresses the positioning connection pin 106 and the force-pushing rod 108 to move, so that the spring outside the force-pushing rod 108 is compressed, and then the fan blade is controlled to rotate. When the positioning connection pin 106 is aligned with the fan blade groove, the spring pushes the force-pushing rod 108 and the positioning connection pin 106 automatically moves, so that the positioning connecting pin 106 is quickly inserted into the fan blade groove for positioning and fixing, and then the parts that press the fan blades are controlled to be connected and fixed with the rotating component 103. When the fan is running, the guide component 207 intercepts the airflow and controls the airflow to enter the interior of the airflow pipe component 203, so that the airflow enters the interior of the external heat dissipation component 2 through the opening, so that the airflow passes evenly through the outside of the plastic-encapsulated brushless DC motor 1, thereby improving the heat dissipation efficiency. At the same time, the airflow passes through the guide plate structure 303 of the rear component 208 and blows to the rear of the plastic-encapsulated brushless DC motor 1, thereby further improving the heat dissipation intensity.

[0039] In this article, there are a few points to note:

[0040] 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.

[0041] 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.

[0042] 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. A plastic-encapsulated brushless DC motor for a fan, characterized in that: include: A plastic-encapsulated brushless DC motor (1); the front end of the plastic-encapsulated brushless DC motor (1) is driven and connected to a rotating assembly (103); the front end of the rotating assembly (103) is inserted with a positioning connection pin (106) through a slot (105); a square hole for connection is provided inside the positioning connection pin (106); a positioning connection plug plate (107) is inserted inside the square hole; the positioning connection plug plate (107) is fixedly connected to a force-bearing push rod (108); the force-bearing push rod (108) is provided with a circular plate on the outside and is sleeved with a spring; an external heat dissipation component (2); the two external heat dissipation components (2) are annular structures; the cross-section of the external heat dissipation components (2) is an arc-shaped plate structure; the two external heat dissipation components (2) are sleeved on the outside of the plastic-encapsulated brushless DC motor (1); the two external heat dissipation components (2) are fixed with three airflow pipe components (203) with a circular tubular structure; the interior of the external heat dissipation components (2) is connected to the interior of the airflow pipe component (203); the three airflow pipe components (203) are arranged in a ring shape on the plastic-encapsulated brushless DC motor (1). The invention relates to an outer portion of a brushless DC motor (1); an inner side of an airflow tube component (203) is provided with an opening, the opening facing the plastic-encapsulated brushless DC motor (1); the airflow tube component (203) is connected to a slide plate component (206) via a guide rod component (205); a flow guide component (207) is fixed to the front end of the slide plate component (206); and both sides of the flow guide component (207) are arc-shaped structures; a support reinforcement structure (3); the support reinforcement structure (3) is installed at the rear of the plastic-encapsulated brushless DC motor (1); the support reinforcement structure ( 3) connected to the guide plate structure (303) through the support plate structure (301), a total of three guide plate structures (303) are provided, the three guide plate structures (303) are arranged in a ring shape behind the plastic-encapsulated brushless DC motor (1), the front end of the guide plate structure (303) is an arc-shaped structure, the guide plate structure (303) is connected to the support head structure (305) through the outer rod structure (304), and the inner end of each support head structure (305) is fixed with two cylindrical rod reinforcement structures (306).

2. A plastic-encapsulated brushless DC motor for a fan according to claim 1, characterized in that: The exterior of the plastic-encapsulated brushless DC motor (1) is provided with three positioning grooves (101) of circular groove-shaped structures; three connection components (102) for fixed connection are fixed to the rear of the plastic-encapsulated brushless DC motor (1); the interior of the connection components (102) is provided with fixing holes for inserting fixing bolts; each connection component (102) is provided with two insertion holes; a metal rod reinforcement structure (306) is inserted into the interior of the insertion holes.

3. A plastic-encapsulated brushless DC motor for a fan according to claim 2, characterized in that: The front end of the rotating assembly (103) is provided with a thread for connection, the outside of the rotating assembly (103) is sleeved with fan blades, the front end of the rotating assembly (103) is penetrated by a slot (105) with arc-shaped structures at both ends, and the positioning connection pin (106) is located inside the slot (105) and moves freely.

4. A plastic-encapsulated brushless DC motor for a fan according to claim 3, characterized in that: The rear end of the rotating assembly (103) is provided with a rear groove (104), the rear groove (104) is connected to the slot (105) through the inner circular hole, a force-bearing push rod (108) is inserted into the rear groove (104) and the inner circular hole, the front end of the spring of the force-bearing push rod (108) contacts the circular plate, the rear end of the spring contacts the rear of the rear groove (104), and the force-bearing push rod (108) and the circular plate are pulled inside the rear groove (104).

5. A plastic-encapsulated brushless DC motor for a fan according to claim 4, characterized in that: Three connecting components (201) are fixed between the two external heat dissipation components (2); the three connecting components (201) are arranged in a ring shape outside the plastic-sealed brushless DC motor (1); a positioning component (202) is fixed to the inner end of each connecting component (201); the outer end of the positioning component (202) is a cylindrical structure and is made of a flexible rubber material; the inner end of the positioning component (202) is a spherical structure and is made of a plastic material; the inner end of the positioning component (202) is embedded in the interior of the positioning groove (101) for positioning and fixing.

6. A plastic-encapsulated brushless DC motor for a fan according to claim 5, characterized in that: A partition component (204) is fixed at the middle position inside each of the airflow tube components (203), and a guide rod component (205) for guiding is fixed inside the opening of the airflow tube component (203).

7. A plastic-encapsulated brushless DC motor for a fan according to claim 6, characterized in that: The guide rod component (205) is sleeved with a slide plate component (206) on the outside. The slide plate component (206) is located outside the guide rod component (205) and is free to slide. The inner end of the slide plate component (206) is a circular tubular structure. The outer end of the slide plate component (206) is a rectangular structure and is in contact with the partition component (204). The airflow tube component (203) is plugged into the rubber rod through a groove. The rubber rod is fixedly connected to the rear component (208). The front end of the rear component (208) is a circular tubular structure. The rear end of the rear component (208) is a rectangular tube structure. The rear of the rear component (208) is butt-jointed with the guide plate structure (303).

8. The plastic-encapsulated brushless DC motor for a fan according to claim 7, characterized in that: The support reinforcement structure (3) is externally welded with three annularly arranged support plate structures (301); the front ends of the support reinforcement structure (3) and the support plate structures (301) are fitted and spliced ​​with a contact plate (302) made of rubber material; and the front end of the contact plate (302) is fitted with the rear of the plastic-encapsulated brushless DC motor (1).

9. The plastic-encapsulated brushless DC motor for a fan according to claim 8, characterized in that: The two ends of the guide plate structure (303) are fixedly connected to the outer rod structure (304) of the arc structure, the side of the outer rod structure (304) is fixedly connected to the support head structure (305) of the circular structure, and the support head structure (305) is fitted to the rear of the connection assembly (102).

10. The plastic-encapsulated brushless DC motor for a fan according to claim 9, characterized in that: There are three supporting head structures (305) in total, and a circular groove is provided at the rear of each supporting head structure (305), and a ring-shaped fixed tooth structure (307) is provided inside the groove. The conical fixed tooth structure (307) is made of metal, and the outer end of the fixed tooth structure (307) protrudes from the supporting head structure (305).

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