A heat dissipation winding structure for a hollow cup motor

Abstract

This utility model discloses a heat dissipation winding structure for a coreless motor, relating to the field of coreless motors. It includes a motor housing, a stator core fixedly mounted on the inner wall of the housing, a coreless winding inside the stator core, end caps at both ends of the motor housing, magnets inside the coreless winding, and a rotating shaft fixedly connected inside the magnets. The two ends of the rotating shaft are rotatably connected to the corresponding end caps. Balance rings are symmetrically fixedly connected to the outer sides of the rotating shafts. Multiple airflow grooves are arranged in a ring array on the outer surface of the balance rings. This utility model uses the balance rings to counteract the centrifugal force generated by the unbalanced mass of the rotating shaft itself. Furthermore, the airflow grooves on the surface of the balance rings, driven by the rotating shaft, act like miniature fan blades, actively propelling the air inside the motor to flow rapidly, quickly carrying away heat and improving heat dissipation. Additionally, the heat dissipation fins on the surface of the motor housing increase the heat dissipation area, allowing heat to be transferred to the surrounding environment more efficiently.

Description

Technical Field

[0001] This utility model relates to the field of hollow cup motors, and in particular to a heat dissipation winding structure for a hollow cup motor. Background Technology

[0002] Coreless motors, with their significant advantages of high efficiency, high power density, and fast response, are widely used in aerospace, medical devices, robotics, automation equipment, and many other fields with stringent performance requirements. Most existing coreless motors rely on natural heat dissipation or simple heat sinks. Natural heat dissipation primarily depends on heat conduction and convection between the motor casing and the surrounding air; however, this method is slow and insufficient to meet the cooling demands of high-power, long-term operation. While simple heat sinks increase the heat dissipation area, their effectiveness is limited due to the lack of effective airflow guidance. For example, in some small coreless motors, relying solely on natural heat dissipation from the motor casing leads to a rapid increase in internal temperature during prolonged continuous operation, resulting in performance degradation and even malfunction.

[0003] Secondly, because coreless motors are generally small in size and have a compact internal structure with limited space between components, airflow is greatly restricted. During operation, the heat generated is difficult to dissipate quickly, easily accumulating inside the motor and forming localized high-temperature areas. This not only affects the motor's electromagnetic performance but also accelerates the aging of the internal insulation materials, reducing the motor's lifespan. Utility Model Content

[0004] The purpose of this invention is to provide a heat dissipation winding structure for a hollow cup motor, which solves the problems of low heat dissipation efficiency and poor heat dissipation in existing hollow cup motors.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A heat dissipation winding structure for a hollow cup motor includes a motor housing, a stator core fixedly disposed on the inner wall of the motor housing, a hollow cup winding disposed inside the stator core, end caps disposed at both ends of the motor housing, a magnet disposed inside the hollow cup winding, a rotating shaft fixedly connected inside the magnet, the two ends of the rotating shaft being rotatably connected to the corresponding end caps, a balance ring symmetrically fixedly connected to the outer side of the rotating shaft, and multiple airflow grooves being formed in a ring array on the outer surface of the balance ring.

[0006] Preferably, a brush holder is embedded inside one end of the motor housing. The brush holder provides current input to the hollow cup winding, ensuring that the motor can work normally and realize the conversion of electrical energy into mechanical energy.

[0007] Preferably, the outer surface of the motor housing is provided with heat dissipation fins. The heat dissipation fins increase the heat dissipation area of ​​the motor housing, improve the heat dissipation efficiency of the motor, and prevent the motor from being damaged due to overheating.

[0008] Preferably, ventilation holes are evenly spaced on the surface of the end cover. The ventilation holes promote the circulation of air inside the motor and outside air, improve heat dissipation efficiency, and ensure that the motor operates at a suitable temperature.

[0009] Preferably, the airflow groove extends obliquely along the circumference of the balance ring. The oblique airflow groove can enhance the balance ring's ability to drive airflow, increase the airflow speed inside the motor, and thus enhance the heat dissipation effect.

[0010] Preferably, the surface of the heat dissipation fins is coated with a heat dissipation coating to further improve the heat dissipation efficiency of the heat dissipation fins and enhance the overall heat dissipation performance of the motor.

[0011] Preferably, the outer surface of the hollow cup winding is coated with an insulating layer to provide electrical insulation, prevent leakage current from the hollow cup winding, and ensure the safe operation of the motor and the stability of its electromagnetic performance.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. This utility model uses a balance ring to counteract the centrifugal force generated by the unbalanced mass of the rotating shaft. It also utilizes the airflow grooves on the surface of the balance ring, which, driven by the rotating shaft, act like miniature fan blades to actively promote the rapid flow of air inside the motor, quickly carrying away heat and improving the heat dissipation effect. Furthermore, the heat dissipation fins on the surface of the motor housing increase the heat dissipation area, allowing heat to be transferred to the surrounding environment more efficiently.

[0014] 2. This utility model uses a balance ring symmetrically fixedly connected to the outside of the rotating shaft, which plays the role of balancing the rotating shaft. By precisely adjusting the mass distribution of the balance ring, the centrifugal force generated by the unbalanced mass of the rotating shaft itself can be offset, so that the rotating shaft can achieve dynamic balance when rotating. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the motor housing structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the rotating shaft structure of this utility model.

[0018] Figure 4 This is a cross-sectional view of the balance ring structure of this utility model.

[0019] Reference numerals in the attached diagram: 1. Motor housing; 2. Stator core; 3. Hollow cup winding; 4. End cover; 5. Magnet; 6. Shaft; 7. Balance ring; 71. Airflow groove; 8. Brush holder; 9. Heat sink fins; 10. Ventilation hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1 to 4 This embodiment provides a heat dissipation winding structure for a hollow cup motor, including a motor housing 1, a stator core 2 fixedly disposed on the inner wall of the motor housing 1, a hollow cup winding 3 disposed inside the stator core 2, end caps 4 disposed at both ends of the motor housing 1, a magnet 5 disposed inside the hollow cup winding 3, a rotating shaft 6 fixedly connected inside the magnet 5, the two ends of the rotating shaft 6 being rotatably connected to the corresponding end caps 4, a balance ring 7 symmetrically fixedly connected to the outer side of the rotating shaft 6, and multiple airflow grooves 71 formed in a ring array on the outer surface of the balance ring 7;

[0022] When the motor is running, the shaft 6 rotates inside the end cover 4, driving the magnet 5 to rotate. The magnet 5 interacts with the hollow cup winding 3 to generate electromagnetic force, thereby realizing the conversion of electrical energy into mechanical energy. The stator core 2 provides a circuit for the magnetic field. The motor housing 1 plays a protective and support role. The balance ring 7 rotates with the shaft 6. The airflow grooves 71 on its surface promote airflow like fan blades during rotation, allowing the air inside the motor to exchange with the outside air and carrying away the heat generated by the motor operation. In addition, the balance ring 7 can counteract the centrifugal force generated by the unbalanced mass of the shaft 6 itself, ensuring that the shaft 6 achieves dynamic balance when rotating.

[0023] A brush holder 8 is embedded inside one end of the motor housing 1. During motor operation, the brushes on the brush holder 8 contact the commutator. The commutator is usually connected to the shaft 6, which is a common structure. It provides current to the hollow cup winding 3, enabling the motor to run continuously.

[0024] The outer surface of the motor housing 1 is provided with heat dissipation fins 9. When the motor is running, it generates heat, which is transferred to the motor housing 1. The heat dissipation fins 9 increase the heat dissipation area of ​​the motor housing 1, allowing the heat to be dissipated into the surrounding air more quickly and reducing the motor temperature.

[0025] Ventilation holes 10 are provided at equal intervals on the surface of the end cover 4. The ventilation holes 10 on the surface of the end cover 4 allow the interior of the motor to communicate with the outside air. Under the airflow driven by the rotation of the balance ring 7 and the natural convection generated during the operation of the motor, air can enter and exit the interior of the motor through the ventilation holes 10, carrying away heat and enhancing the heat dissipation effect.

[0026] The airflow groove 71 extends obliquely along the circumference of the balance ring 7. When the rotating shaft 6 drives the balance ring 7 to rotate, the oblique airflow groove 71 generates a pushing force on the air like a fan blade, causing the air to flow inside the motor and accelerating the dissipation of heat.

[0027] The surface of the heat dissipation fins 9 is coated with a heat dissipation coating, which can improve the heat dissipation capacity of the heat dissipation fins 9 and enable heat to be transferred from the motor housing 1 to the heat dissipation fins 9 more quickly.

[0028] The outer surface of the hollow cup winding 3 is coated with an insulating layer. During motor operation, the hollow cup winding 3 generates current, which may cause leakage between the winding and surrounding components. The insulating layer coated on the outer surface of the hollow cup winding 3 can prevent current leakage and ensure that the current flows in the winding according to the predetermined path, thereby realizing the normal electromagnetic conversion of the motor.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation winding structure for a hollow cup motor, comprising a motor housing (1), wherein a stator core (2) is fixedly disposed on the inner wall of the motor housing (1), characterized in that, The stator core (2) is provided with a hollow cup winding (3), and the motor housing (1) is provided with end caps (4) at both ends. The hollow cup winding (3) is provided with a magnet (5), and a rotating shaft (6) is fixedly connected inside the magnet (5). The two ends of the rotating shaft (6) are respectively rotatably connected inside the corresponding end caps (4). A balance ring (7) is symmetrically fixedly connected to the outside of the rotating shaft (6). The outer surface of the balance ring (7) is provided with multiple airflow grooves (71) in a ring array.

2. The heat dissipation winding structure of the hollow cup motor according to claim 1, characterized in that, A brush holder (8) is embedded inside one end of the motor housing (1).

3. The heat dissipation winding structure of the hollow cup motor according to claim 1, characterized in that, The outer surface of the motor housing (1) is provided with heat dissipation fins (9).

4. The heat dissipation winding structure of the hollow cup motor according to claim 1, characterized in that, Ventilation holes (10) are provided at equal intervals on the surface of the end cap (4).

5. The heat dissipation winding structure of the hollow cup motor according to claim 1, characterized in that, The airflow groove (71) extends obliquely along the circumferential direction of the balance ring (7).

6. The heat dissipation winding structure of the hollow cup motor according to claim 3, characterized in that, The surface of the heat dissipation fins (9) is coated with a heat dissipation coating.

7. The heat dissipation winding structure of the hollow cup motor according to claim 1, characterized in that, The outer surface of the hollow cup winding (3) is coated with an insulating layer.

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