Motor structure with counterweight fan

Abstract

The utility model relates to the technical field of motor fans, in particular to a motor structure with a counterweight fan, which comprises a fan, the fan comprises an inner ring, an outer ring, a plurality of groups of fan blades connected with the inner ring and the outer ring, and a counterweight part arranged on the inner ring or / and the outer ring, the plurality of groups of fan blades are arranged around the inner ring, and the fan blades are arranged around the outer ring. The counterweight design can significantly reduce vibration and noise during operation of the motor, stability and reliability of overall operation are improved, vibration reduction means that abrasion and stress between parts inside the motor are reduced, and therefore the service life of the motor and the service life of a fan of the motor are prolonged. The fan with the counterweight part arranged on the outer ring solves the problem of rotation balance of the motor and improves the heat dissipation efficiency of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motor brushes, and in particular discloses a motor structure with a counterweight fan. Background Art

[0002] In modern product design, especially for medical products that pursue a "small and beautiful" appearance, the operating stability and smoothness of the transmission motor are particularly important. When these products encounter problems with the motor stopping and running smoothly during operation, counterweight flywheels are often used as one of the solutions. However, there may be some problems with counterweight flywheels in actual applications. For example, counterweight flywheels usually need to be made of relatively strong and high-density materials to ensure their stability and durability. These materials are often expensive, which increases the overall manufacturing cost of the product. The ineffective volume is large. In order to save process costs, the inner core is generally larger than the solid core, and the installation position of the counterweight flywheel is often close to the motor, which may block the heat dissipation channel of the motor and affect the heat dissipation efficiency of the motor. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a motor structure with a counterweight fan.

[0004] To achieve the above-mentioned purpose, the utility model provides a motor structure with a counterweight fan, comprising a fan, wherein the fan comprises an inner ring, an outer ring, multiple groups of fan blades connecting the inner ring and the outer ring, and a counterweight portion arranged on the inner ring and / or the outer ring, the multiple groups of fan blades are arranged around the inner ring, and the outer ring is surrounded by fan blades.

[0005] By placing counterweights on the inner ring, outer ring, or both, the fan effectively balances the vibration and unbalanced forces generated by high-speed rotation. This counterweight design significantly reduces vibration and noise during motor operation, improving overall operational stability and reliability. Reduced vibration reduces wear and stress between internal motor components, thereby extending the lifespan of the motor and its fan. Fans with counterweights on the outer ring solve the problem of motor rotational balance while improving the motor's heat dissipation efficiency.

[0006] The counterweight is curved and extends along the central axis of the inner ring. This design helps maintain a more stable fan during rotation. This helps reduce fan shake at high speeds, ensuring a smoother fan trajectory. The curved counterweight design is relatively simple and can be easily manufactured using processes such as casting, injection molding, or machining. This helps reduce production costs and improves efficiency and consistency.

[0007] The counterweight part is made of metal material, and the inner ring or / and the outer ring are made of insulating plastic. The density of the counterweight part is greater than that of the insulating plastic. The high density of the metal material means that under the same volume, the metal counterweight part can provide a greater mass, thus more effectively balancing the unbalanced force during the rotation of the fan. This efficient counterweight effect helps to significantly reduce vibration and noise, and improve the operating stability of the motor. The inner ring or / and the outer ring made of insulating plastic ensure the electrical insulation performance of the motor structure. This is crucial for preventing safety accidents such as electrical short circuits and electric shocks during the operation of the motor. The use of insulating plastic also makes the motor structure lighter and corrosion-resistant, suitable for various complex environments.

[0008] The counterweight part and the inner ring are of an integral structure or the counterweight part and the outer ring are of an integral structure, which can significantly improve the overall strength of the fan structure. This design enables the fan to better resist centrifugal force during high-speed rotation, reducing structural deformation or damage caused by vibration. The integral structure reduces the assembly steps and simplifies the manufacturing process. Manufacturers can directly produce a fan with a counterweight inner ring or a counterweight part and the outer ring of an integral structure without subsequent counterweight installation procedures, thus improving production efficiency.

[0009] The inner ring is injection-molded and coated on the outside of the counterweight part or the outer ring is injection-molded and coated on the outside of the counterweight part. The injection molding integration technology makes the inner ring and / or the outer ring more firmly combined with the counterweight part, avoiding problems such as loose connection or detachment that may exist in the traditional method. This tight combination not only enhances the overall structural strength of the fan but also improves its vibration resistance and durability, making the structure more stable and not easily loosened.

[0010] Multiple groups of injection holes are provided on the outer ring, and the outer ring is injection-molded integrally with the fan blade through the injection holes. The spacing between the injection holes is the same, ensuring uniform stress on the outer ring and the fan blade during the injection molding integration process. This uniform distribution helps to reduce structural weaknesses caused by stress concentration, thus enhancing the overall structural stability of the fan. Due to the uniform distribution and the same spacing of the injection holes, the injection molding machine can more easily control the injection speed and pressure, thus achieving a more stable and efficient injection process. This helps to improve production efficiency and reduce production costs.

[0011] The fan blade has a wind guiding inclined surface. Along the end of the fan blade away from the outer ring to the end of the fan blade close to the outer ring, the width of the fan blade gradually decreases. The design of the wind guiding inclined surface enables the fan blade to better guide the flow direction of the air flow when rotating. As the width of the fan blade gradually increases, the resistance of the air flow passing through the fan blade gradually decreases, thus improving the smoothness and directivity of the air flow. This design helps to enhance the heat dissipation effect of the fan, especially in application scenarios where directional heat dissipation is required.

[0012] The motor structure with a weighted fan further includes a shaft body, an end cover assembly, and multiple sets of fixing rods. The inner ring is sleeved on the outer side of the shaft body. The end cover assembly includes a front cover and a bottom cover, which are arranged in parallel and sleeved on the shaft body. Multiple sets of limiting holes are provided on the end cover assembly. External threads are provided at both ends of the fixing rods, and both ends of the fixing rods are screwed to the limiting holes on the front cover and the bottom cover via the external threads. The end cover assembly consists of the front cover and the bottom cover, which are oppositely arranged and sleeved on the shaft body, jointly forming the outer frame of the fan assembly. The front cover and the bottom cover are designed to closely cooperate with the shaft body to prevent axial or radial displacement of the fan assembly during rotation. At the same time, the end cover assembly also plays a role in protecting the internal structure of the motor and guiding the airflow. By providing multiple sets of limiting holes on the end cover assembly and screwing both ends of the fixing rods to these limiting holes, the entire motor structure forms a stable support system under the combined action of the shaft body, the end cover assembly, and the fixing rods.

[0013] The motor structure with a weighted fan further includes a stator component, a rotor component used in cooperation with the stator component, and a cylindrical outer shell arranged along the length direction of the shaft body. A heat dissipation channel is formed between the stator component and the rotor component. The stator component is sleeved on the shaft body, the rotor component is sleeved around the outer side of the stator component, and the cylindrical outer shell is sleeved on the outer side of the rotor component via the fixing rods. Both ends of the cylindrical outer shell are respectively in contact with the front cover and the bottom cover.

[0014] The stator component and the rotor component are the core components of the motor, and their interaction realizes the conversion of electrical energy and the output of mechanical energy. The stator component is sleeved on the shaft body, providing a stable support structure for the motor; the rotor component is sleeved around the outer side of the stator component and generates relative motion with the stator component through the principle of electromagnetic induction, thereby driving the fan to rotate. This design ensures the efficient operation and stable output of the motor. The heat dissipation channel formed between the stator component and the rotor component is the key to motor heat dissipation. During the operation of the motor, a large amount of heat is generated due to current passing and mechanical friction, etc. If it cannot be dissipated in time, it will affect the performance and lifespan of the motor. The design of the heat dissipation channel enables air to flow smoothly through the interior of the motor, taking away the generated heat and maintaining the normal operating temperature of the motor. The cylindrical outer shell is arranged along the length direction of the shaft body and is sleeved on the outer side of the rotor component via the fixing rods. It not only provides external protection for the motor, preventing impurities such as dust and moisture from entering the interior of the motor, but also plays a role in guiding the airflow and enhancing the heat dissipation effect. Both ends of the cylindrical outer shell are respectively in contact with the front cover and the bottom cover, forming a closed motor cavity, further improving the sealing and safety of the motor.

[0015] Ventilation holes communicating with the heat dissipation channels are provided on both the front cover and the bottom cover; there are two sets of fans, and the front cover and the bottom cover are located between the two sets of fans. The arrangement of the ventilation holes enables the cold air outside the motor to smoothly enter the interior of the motor and exchange heat with the hot air generated inside the motor through the heat dissipation channels. This heat exchange process effectively reduces the temperature inside the motor and prevents performance degradation or damage caused by overheating. The connection between the ventilation holes and the heat dissipation channels ensures that heat can be quickly discharged from the interior of the motor, improving the heat dissipation efficiency.

[0016] The two sets of fans are respectively a first fan body and a second fan body, and the blade directions of the first fan body and the second fan body are the same. The first fan body starts to work and blows out the heat generated by the heat dissipation channel. At the same time, the second fan body sucks the external cold air into the heat dissipation channel through rotation, thereby realizing the effective dissipation of heat. Since the blade directions of the first fan body and the second fan body are the same, the air flow directions generated by them during operation are also consistent. This design helps to form a stable air flow path in the heat dissipation channel, enabling the air to smoothly pass through the heat dissipation channel, thereby more effectively taking away the heat inside the motor.

[0017] The motor structure with a weighted fan further includes a commutator, a spring member, and a brush element. The bottom cover includes a cover body and a clamping block detachably connected to the cover body. The clamping block includes a first limiting block and a second limiting block. The first limiting block and the second limiting block clamp the spring member and the brush element. The cover body has a receiving groove, and the brush element is movably arranged in the receiving groove. A limiting member is used to cover the opening of the receiving groove. The commutator is sleeved on the shaft body, the bottom cover is sleeved on the commutator, and the spring member abuts against the brush element so that the brush element abuts against the commutator.

[0018] The limiting member is used to cover the opening of the receiving groove to prevent impurities such as dust and moisture from entering the interior of the receiving groove and affecting the normal operation of the brush element and the spring member. At the same time, the limiting member also plays a certain fixing role to prevent the brush element from accidentally falling off or shifting during the operation of the motor. The brush element is a component in the motor used to contact the commutator and conduct current. In the receiving groove of the bottom cover, the brush element is arranged to be movable so as to be able to move flexibly as the commutator rotates. At the same time, the spring member is arranged above the brush element and abuts against the brush element to provide the necessary pressure to ensure that the brush element is always in close contact with the commutator. This design ensures the stable transmission of current and the continuous operation of the motor.

[0019] Advantages of the present utility model: The present utility model relates to a motor structure with a weighted fan, including a fan. The fan includes an inner ring, an outer ring, multiple groups of fan blades connecting the inner ring and the outer ring, and a weight portion provided on the inner ring or / and the outer ring. The multiple groups of fan blades are arranged around the inner ring, and the outer ring surrounds the fan blades. The inner core of the transmission motor counterweight wheel in the market is made into an integrally formed fan blade shape, and the outer frame of the counterweight wheel is made into a weight portion provided on the inner ring or / and the outer ring, which not only optimizes the rotational balance of the fan, reduces vibration and noise, improves the operating efficiency, but also increases the heat dissipation of the motor, solving the problems of overheating and weakness of the motor. Description of the Drawings

[0020] Figure 1 is a schematic structural view of the fan of the present utility model;

[0021] Figure 2 is an exploded schematic view of the fan and the weight portion of the present utility model;

[0022] Figure 3 is a schematic structural view of the whole of the present utility model;

[0023] Figure 4 is an exploded schematic view of the motor structure with a weighted fan of the present utility model;

[0024] Figure 5 is a schematic structural view of the bottom cover of the present utility model.

[0025] The reference numerals include:

[0026] 1, fan; 2, inner ring; 3, fan blade; 5, outer ring; 6, weight portion; 7, injection hole; 8, shaft body; 9, end cover assembly; 11, fixing rod; 12, front cover; 13, bottom cover; 14, limiting hole; 15, stator member; 16, rotor member; 17, cylindrical housing; 18, ventilation hole; 19, first fan body; 21, second fan body; 22, commutator; 23, spring member; 24, brush element; 25, cover body; 26, clamping block; 27, first limiting block; 28, second limiting block. Detailed Embodiment

[0027] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and drawings. The content mentioned in the embodiments does not limit the present utility model.

[0028] Please refer to Figures 1 to 5 As shown, a motor structure with a weighted fan of the present utility model includes a fan 1. The fan 1 includes an inner ring 2, an outer ring 5, multiple groups of fan blades 3 connecting the inner ring 2 and the outer ring 5, and a weight portion 6 provided on the inner ring 2 or / and the outer ring 5. The multiple groups of fan blades 3 are arranged around the inner ring 2, and the outer ring 5 surrounds the fan blades 3.

[0029] By arranging the counterweight portion 6 on the inner ring 2, the outer ring 5 or both of the fan 1, the vibration and unbalanced force generated when the fan 1 rotates at high speed can be effectively balanced. This counterweight design can significantly reduce the vibration and noise during the operation of the motor, improve the overall operation stability and reliability. Reducing vibration means reducing the wear and stress between the internal components of the motor, thereby extending the service life of the motor and its fan 1. The fan 1 with the counterweight portion 6 arranged on the outer ring 5 solves the problem of the rotational balance of the motor while improving the heat dissipation efficiency of the motor.

[0030] The counterweight portion 6 is arc-shaped and is arranged by extending along the central axis around the inner ring 2. The design of the counterweight portion 6 extending along the central axis of the inner ring 2 enables the fan 1 to maintain a more stable posture during rotation. This design helps to reduce the sway of the fan 1 during high-speed rotation and ensures that the fan 1 operates along a smoother trajectory. The arc-shaped design of the counterweight portion 6 is relatively simple and can be easily manufactured by processes such as casting, injection molding or machining. This helps to reduce production costs and improve production efficiency and consistency.

[0031] The counterweight portion 6 is made of a metal material, the inner ring 2 or / and the outer ring 5 are made of an insulating plastic, and the density of the counterweight portion 6 is greater than that of the insulating plastic. The high density of the metal material means that, for the same volume, the metal counterweight portion 6 can provide a greater mass, thus more effectively balancing the unbalanced force when the fan 1 rotates. This efficient counterweight effect helps to significantly reduce vibration and noise and improve the operation stability of the motor. The inner ring 2 or / and the outer ring 5 made of an insulating plastic ensure the electrical insulation performance of the motor structure. This is crucial for preventing electrical short circuits, electric shocks and other safety accidents during the operation of the motor. The use of insulating plastic also makes the motor structure lighter and more corrosion-resistant, suitable for various complex environments.

[0032] The counterweight portion 6 and the inner ring 2 are of an integral structure or the counterweight portion 6 and the outer ring 5 are of an integral structure, which can significantly improve the overall strength of the structure of the fan 1. This design enables the fan 1 to better resist the centrifugal force during high-speed rotation and reduce the structural deformation or damage caused by vibration. The integral structure reduces the assembly steps and simplifies the manufacturing process. Manufacturers can directly produce the fan 1 with a counterweighted inner ring 2 or the counterweight portion 6 and the outer ring 5 of an integral structure without subsequent counterweight installation procedures, thereby improving production efficiency.

[0033] The inner ring 2 is injection-molded and coated on the outer side of the counterweight portion 6 or the outer ring 5 is injection-molded and coated on the outer side of the counterweight portion 6. The injection molding integral forming technology enables the inner ring 2 and / or the outer ring 5 to be more firmly combined with the counterweight portion 6, avoiding the possible problems of loose connection or detachment in the traditional method. This tight combination not only enhances the overall structural strength of the fan 1, but also improves its vibration resistance and durability, and the structure is more stable and not prone to loosening.

[0034] In another embodiment, multiple sets of injection holes 7 are provided on the outer ring 5, and the outer ring 5 and the fan blades 3 are integrally injection-molded via the injection holes 7. The setting intervals between the injection holes 7 are the same, ensuring uniform stress on the outer ring 5 and the fan blades 3 during the integral injection molding process. This uniform distribution helps reduce structural weaknesses caused by stress concentration, thereby enhancing the overall structural stability of the fan 1. Due to the uniform distribution and the same spacing of the injection holes 7, the injection molding machine can more easily control the injection speed and pressure, thus achieving a more stable and efficient injection molding process. This helps improve production efficiency and reduce production costs.

[0035] The fan blade 3 has a wind guiding inclined surface. Along the end of the fan blade 3 away from the outer ring 5 to the end of the fan blade 3 close to the outer ring 5, the width of the fan blade 3 gradually decreases. The design of the wind guiding inclined surface enables the fan blade 3 to better guide the flow direction of the air flow when rotating. As the width of the fan blade 3 gradually increases, the resistance of the air flow passing through the fan blade 3 gradually decreases, thereby improving the smoothness and directivity of the air flow. This design helps enhance the heat dissipation effect of the fan 1, especially in application scenarios where directional heat dissipation is required.

[0036] The motor structure of the weighted fan further includes a shaft body 8, an end cover assembly 9, and multiple sets of fixing rods 11. The inner ring 2 is sleeved on the outer side of the shaft body 8. The end cover assembly 9 includes a front cover 12 and a bottom cover 13. The front cover 12 and the bottom cover 13 are arranged in parallel and are sleeved on the shaft body 8. Multiple sets of limiting holes 14 are provided on the end cover assembly 9. External threads are provided at both ends of the fixing rod 11, and both ends of the fixing rod 11 are screwed to the limiting holes 14 on the front cover 12 and the bottom cover 13 via the external threads. The end cover assembly 9 is composed of the front cover 12 and the bottom cover 13. They are oppositely arranged and sleeved on the shaft body 8, jointly constituting the external framework of the fan 1 assembly. The designs of the front cover 12 and the bottom cover 13 need to be closely matched with the shaft body 8 to prevent axial or radial displacement of the fan 1 assembly during rotation. At the same time, the end cover assembly 9 also plays a role in protecting the internal structure of the motor and guiding the air flow. By providing multiple sets of limiting holes 14 on the end cover assembly 9 and screwing both ends of the fixing rod 11 to these limiting holes 14, the entire motor structure forms a stable support system under the combined action of the shaft body 8, the end cover assembly 9, and the fixing rod 11.

[0037] The motor structure of the weighted fan further includes a stator member 15, a rotor member 16 that cooperates with the stator member 15, and a cylindrical outer shell 17 arranged along the length direction of the shaft body 8. A heat dissipation channel is formed between the stator member 15 and the rotor member 16. The stator member 15 is sleeved on the shaft body 8, the rotor member 16 is coaxially sleeved on the outer side of the stator member 15, and the cylindrical outer shell 17 is sleeved on the outer side of the rotor member 16 via the fixing rod 11. Both ends of the cylindrical outer shell 17 are respectively in contact with the front cover 12 and the bottom cover 13.

[0038] The stator member 15 and the rotor member 16 are the core components in the motor, and their interaction realizes the conversion of electrical energy and the output of mechanical energy. The stator member 15 is sleeved on the shaft body 8, providing a stable support structure for the motor; the rotor member 16 is sleeved around the outside of the stator member 15, and through the principle of electromagnetic induction, it generates relative motion with the stator member 15, thereby driving the fan 1 to rotate. This design ensures the efficient operation and stable output of the motor. The heat dissipation channel formed between the stator member 15 and the rotor member 16 is the key to the heat dissipation of the motor. During the operation of the motor, a large amount of heat will be generated due to current passing through and mechanical friction, etc. If it cannot be dissipated in time, it will affect the performance and life of the motor. The design of the heat dissipation channel enables air to flow smoothly through the inside of the motor, taking away the generated heat and maintaining the normal working temperature of the motor. The cylindrical housing 17 is arranged along the length direction of the shaft body 8 and is sleeved outside the rotor member 16 via the fixing rod 11. It not only provides external protection for the motor, preventing impurities such as dust and moisture from entering the inside of the motor, but also plays a role in guiding the air flow and enhancing the heat dissipation effect. The two ends of the cylindrical housing 17 are respectively in contact with the front cover 12 and the bottom cover 13, forming a closed motor cavity, further improving the sealing and safety of the motor.

[0039] Both the front cover 12 and the bottom cover 13 are provided with ventilation holes 18 communicating with the heat dissipation channel; there are two groups of the fans 1, and the front cover 12 and the bottom cover 13 are located between the two groups of fans 1. The setting of the ventilation holes 18 enables the cold air outside the motor to smoothly enter the inside of the motor, and exchange heat with the hot air generated inside the motor through the heat dissipation channel. This heat exchange process effectively reduces the temperature inside the motor and prevents performance degradation or damage caused by overheating. The connection between the ventilation holes 18 and the heat dissipation channel ensures that the heat can be quickly discharged from the inside of the motor, improving the heat dissipation efficiency.

[0040] The two groups of fans 1 are respectively the first fan body 19 and the second fan body 21, and the directions of the fan blades 3 of the first fan body 19 and the second fan body 21 are the same. The first fan body starts to work, blowing out the heat generated by the heat dissipation channel. At the same time, the second fan body sucks the external cold air into the heat dissipation channel through rotation, thereby realizing the effective dissipation of heat. Since the directions of the fan blades 3 of the first fan body 19 and the second fan body 21 are the same, the directions of the air flow generated when they work are also the same. This design helps to form a stable air flow path in the heat dissipation channel, enabling air to flow smoothly through the heat dissipation channel, thereby more effectively taking away the heat inside the motor.

[0041] The motor structure with a weighted fan further includes a commutator 22, a spring member 23, and a brush element 24. The bottom cover 13 includes a cover body 25 and a clamping block 26 detachably connected to the cover body 25. The clamping block 26 includes a first limit block 27 and a second limit block 28. The first limit block 27 and the second limit block 28 clamp the spring member 23 and the brush element 24. The cover body 25 has a receiving groove, and the brush element 24 is movably arranged in the receiving groove. A limiting member is used to cover the opening of the receiving groove. The commutator 22 is sleeved on the shaft body 8, and the bottom cover 13 is sleeved on the commutator 22. The spring member 23 abuts against the brush element 24 so that the brush element 24 abuts against the commutator 22.

[0042] The limiting member is used to cover the opening of the receiving groove to prevent impurities such as dust and moisture from entering the inside of the receiving groove and affecting the normal operation of the brush element 24 and the spring member 23. At the same time, the limiting member also plays a certain fixing role to prevent the brush element 24 from accidentally falling off or shifting during the operation of the motor. The brush element 24 is a component in the motor used to contact the commutator 22 and conduct current. In the receiving groove of the bottom cover 13, the brush element 24 is arranged to be movable so as to be able to move flexibly with the rotation of the commutator 22. At the same time, the spring member 23 is arranged above the brush element 24 and abuts against the brush element 24 to provide the necessary pressure to ensure that the brush element 24 is always in close contact with the commutator 22. This design ensures the stable transmission of current and the continuous operation of the motor.

[0043] The rest of this embodiment is the same as that of Embodiment 1. For the features not explained in this embodiment, the explanations of Embodiment 1 are adopted and will not be elaborated here.

[0044] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A motor structure with a weighted fan, characterized in that: It includes a fan (1), and the fan (1) includes an inner ring (2), an outer ring (5), multiple groups of fan blades (3) connecting the inner ring (2) and the outer ring (5), and a counterweight part (6) provided on the inner ring (2) or / and the outer ring (5). The multiple groups of fan blades (3) are arranged around the inner ring (2), and the outer ring (5) surrounds the fan blades (3).

2. The motor structure with a weighted fan according to claim 1, characterized in that: The counterweight part (6) is arc-shaped and is formed by extending along the central axis around the inner ring (2).

3. The motor structure with a weighted fan according to claim 1, characterized in that: The counterweight part (6) is made of a metal material, the inner ring (2) or / and the outer ring (5) is made of an insulating plastic, and the density of the counterweight part (6) is greater than that of the insulating plastic.

4. The motor structure with a weighted fan according to claim 1, characterized in that: The counterweight part (6) and the inner ring (2) are of an integral structure or the counterweight part (6) and the outer ring (5) are of an integral structure.

5. The motor structure with a weighted fan according to claim 4, wherein: The inner ring (2) is injection-molded to cover the outside of the counterweight part (6) or the outer ring (5) is injection-molded to cover the outside of the counterweight part (6).

6. The motor structure with a weighted fan according to claim 1, characterized in that: Multiple groups of injection holes (7) are provided on the outer ring (5), and the outer ring (5) is injection-molded integrally with the fan blades (3) via the injection holes (7).

7. A motor structure with a weighted fan according to claim 1, characterized in that: The fan blade (3) has a wind guiding inclined surface, and the width of the fan blade (3) gradually decreases from the end of the fan blade (3) away from the outer ring (5) to the end of the fan blade (3) close to the outer ring (5).

8. A motor structure with a weighted fan according to claim 1, characterized in that: The motor structure with the counterweight fan further includes a shaft body (8), an end cover assembly (9) and multiple groups of fixing rods (11). The inner ring (2) is sleeved on the outside of the shaft body (8). The end cover assembly (9) includes a front cover (12) and a bottom cover (13). The front cover (12) and the bottom cover (13) are arranged in parallel and are sleeved on the shaft body (8). Multiple groups of limiting holes (14) are provided on the end cover assembly (9). External threads are provided at both ends of the fixing rod (11), and both ends of the fixing rod (11) are screwed to the limiting holes (14) on the front cover (12) and the bottom cover (13) via the external threads.

9. The motor structure with a weighted fan according to claim 5, characterized in that: The motor structure with the counterweight fan further includes a stator part (15), a rotor part (16) used in cooperation with the stator part (15), and a cylindrical outer shell (17) arranged along the length direction of the shaft body (8). A heat dissipation channel is formed between the stator part (15) and the rotor part (16). The stator part (15) is sleeved on the shaft body (8), the rotor part (16) is surrounded and sleeved on the outside of the stator part (15), the cylindrical outer shell (17) is sleeved on the outside of the rotor part (16) via the fixing rod (11), and both ends of the cylindrical outer shell (17) are respectively in contact with the front cover (12) and the bottom cover (13).

10. A motor structure with a weighted fan according to claim 8, characterized in that: Ventilation holes (18) communicating with the heat dissipation channel are provided on both the front cover (12) and the bottom cover (13); there are two groups of the fans (1), and the front cover (12) and the bottom cover (13) are located between the two groups of fans (1).

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