Brushless motor rotor support assembly

Abstract

The utility model belongs to the technical field of motor accessories, and particularly discloses a brushless motor rotor support assembly which comprises a support outer ring, an inner ring is arranged on the inner side of the support outer ring, and a supporting plate is arranged between the support outer ring and the inner ring. A heat dissipation assembly is arranged at the top of the inner ring; the heat dissipation assembly is used for improving the heat exchange effect and comprises a plurality of arc-shaped plates, the arc-shaped plates are evenly distributed along the axis of the inner ring, a plurality of cooling fins are arranged on one side of each arc-shaped plate, and the cooling fins are used for increasing the heat dissipation surface area of the arc-shaped plates. The arc-shaped plates are evenly distributed along the axis of the inner ring and are in good contact with the inner ring, heat of the inner ring can be rapidly received and evenly transmitted, the heat dissipation surface area is increased through the cooling fins, the heat exchange efficiency with air is improved, meanwhile, turbine structures of the arc-shaped plates rotate along with a motor rotating shaft, airflow can be disturbed, the airflow speed is increased, and the service life of the motor is prolonged. The heat exchange effect is obviously improved, the service life of the motor is prolonged, and the performance stability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motor accessories, and more specifically, to a brushless motor rotor bracket assembly. Background Art

[0002] Brushless motors primarily operate through electronic commutation. They utilize the interaction between the rotating magnetic field generated by the stator windings and the permanent magnets on the rotor to drive the rotor. Compared to traditional brushed motors, brushless motors eliminate the brushes and commutator, avoiding the problems associated with brush wear and commutation sparks, such as energy loss, electromagnetic interference, and shortened lifespan. This results in higher efficiency, longer lifespan, and better speed regulation.

[0003] The rotor bracket and rotor assembly with publication number CN215956146U, this patent forms a first support portion between the inner cylinder and the outer cylinder of the rotor bracket, and a first through hole is provided on the first support portion. While the first support portion provides strength support for the rotor bracket, the first through hole thereon helps to reduce the overall weight of the rotor bracket. In the rotor assembly involved in this application, multiple rotor brackets are arranged in sequence on the rotating shaft. The length of the rotor bracket can be adjusted according to the actual processing difficulty, which reduces the processing difficulty, improves the installation efficiency, and is conducive to achieving the requirements of product serialization and standardization.

[0004] While this patent reduces processing complexity, it relies primarily on natural convection and heat conduction for heat dissipation, resulting in relatively low heat dissipation efficiency. In some high-power density motor applications, the motor generates significant heat, and natural heat dissipation alone often fails to meet requirements, leading to rapid motor temperature increases, performance degradation, and shortened lifespan. Utility Model Content

[0005] In order to solve the above problems, the present application provides a brushless motor rotor bracket assembly.

[0006] The brushless motor rotor bracket assembly provided in this application adopts the following technical solution:

[0007] A brushless motor rotor bracket assembly includes a bracket outer ring, an inner ring is provided on the inner side of the bracket outer ring, a support plate is provided between the bracket outer ring and the inner ring; a heat dissipation component is provided on the top of the inner ring;

[0008] The heat dissipation component is used to improve the heat exchange effect, including an arc-shaped plate. The number of the arc-shaped plates is set to multiple, and the multiple arc-shaped plates are evenly distributed along the axis of the inner ring. Multiple heat sinks are provided on one side of each arc-shaped plate, and the multiple heat sinks are used to increase the heat dissipation surface area of the arc-shaped plate.

[0009] Through this technical solution, multiple curved plates are evenly distributed along the inner ring's axis and maintain good contact with it, quickly receiving and evenly transferring heat from the inner ring. The heat sink increases the heat dissipation surface area, improving heat exchange efficiency with the air. Furthermore, the turbine structure of the curved plates rotates with the motor shaft, disrupting the airflow and increasing air velocity, significantly enhancing heat exchange. This allows heat to dissipate quickly within the motor, effectively reducing motor temperature and preventing local overheating. This ensures that all motor components operate at optimal temperatures, extending the motor's service life and performance stability.

[0010] Furthermore, the arc-shaped plate is located above the inner ring and contacts the inner ring.

[0011] Furthermore, multiple groups of placement blocks are provided between the outer ring and the inner ring of the bracket, and the number of placement blocks in each group is set to two. Each group of placement blocks is respectively connected to the corresponding outer ring and inner ring of the bracket, and a placement groove is formed between the two placement blocks.

[0012] Furthermore, both ends of the arc-shaped plate are respectively located inside the corresponding placement grooves, and both ends of each arc-shaped plate are fixedly connected to two connecting plates.

[0013] Furthermore, a through hole is provided inside each connecting plate, and a plurality of mounting holes are provided inside the outer ring of the bracket, and each through hole corresponds to a mounting hole one-to-one.

[0014] Furthermore, bolts are provided inside every two corresponding through holes and mounting holes, and each arc-shaped plate is connected to the support plate by bolts.

[0015] Through the above technical solution, the curved plate is designed to be detachable, so that maintenance personnel can easily remove the damaged curved plate and carry out targeted repairs without the need for large-scale disassembly of the entire motor, saving maintenance time and costs, improving maintenance efficiency, ensuring the rapid resumption of operation of the motor, and reducing equipment downtime caused by motor failure.

[0016] Furthermore, two groups of ventilation holes are opened inside the inner ring, and the number of ventilation holes in each group is set to be multiple.

[0017] Through the above technical solution, the air flowing in the ventilation holes will also exchange heat with the wall surface of the inner ring, further taking away the heat on the inner ring.

[0018] Furthermore, a connecting ring is provided at the bottom of the inner ring, and a reinforcing rod is fixedly connected to the outer wall of the connecting ring, and the outer end of the reinforcing rod is connected to the outer ring of the bracket.

[0019] Through the above technical solution, the reinforcing rod strengthens the structural stability between the inner ring and the outer ring of the bracket.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] (1) The multiple arc-shaped plates of the present invention are evenly distributed along the axis of the inner ring and in good contact with the inner ring, which can quickly receive and evenly transfer the heat of the inner ring. The heat sink increases the heat dissipation surface area and improves the heat exchange efficiency with the air. At the same time, the turbine structure of the arc-shaped plate rotates with the motor shaft to disturb the airflow, increase the airflow speed, and significantly improve the heat exchange effect, so that the heat inside the motor can be quickly dissipated, effectively reducing the motor temperature, avoiding local overheating, ensuring that the various components of the motor operate at an appropriate temperature, and extending the service life and performance stability of the motor;

[0022] (2) The arc plate of the utility model is designed to be detachable, so that maintenance personnel can easily remove the damaged arc plate and carry out targeted repairs without having to disassemble the entire motor on a large scale. This saves maintenance time and cost, improves maintenance efficiency, ensures the motor's rapid resumption of operation, and reduces equipment downtime caused by motor failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a bottom view of the utility model;

[0025] Figure 3 It is a cross-sectional view of the utility model;

[0026] Figure 4 This is an exploded view of the present invention.

[0027] Explanation of the accompanying drawings: 1. Outer ring of the bracket; 2. Inner ring; 3. Ventilation hole; 4. Support plate; 5. Placement groove; 6. Connecting ring; 7. Reinforcement rod; 8. Bolt; 9. Placement block; 10. Mounting hole; 11. Arc plate; 12. Connecting plate; 13. Heat sink. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0029] Reference Figures 1-4 A brushless motor rotor bracket assembly includes a bracket outer ring 1, an inner ring 2 is provided on the inner side of the bracket outer ring 1, a support plate 4 is provided between the bracket outer ring 1 and the inner ring 2; a heat dissipation component is provided on the top of the inner ring 2;

[0030] The heat dissipation component is used to improve the heat exchange effect, including an arc-shaped plate 11. The number of the arc-shaped plates 11 is set to multiple, and the multiple arc-shaped plates 11 are evenly distributed along the axis of the inner ring 2. A plurality of heat sinks 13 are provided on one side of each arc-shaped plate 11. The multiple heat sinks 13 are used to increase the heat dissipation surface area of the arc-shaped plate 11.

[0031] When a brushless motor is running, copper losses in the stator windings and iron losses in the stator core generate heat, raising the internal temperature of the motor. This heat is first transferred to the inner ring 2, which is closer to the heat source, through heat conduction. Due to its excellent thermal conductivity, the inner ring 2 can quickly absorb heat from within the motor. The heat on the inner ring 2 is then transferred to the curved plate 11 connected to it. Multiple curved plates 11 are evenly distributed along the axis of the inner ring 2, increasing the contact area with the inner ring 2 and facilitating uniform heat transfer. The curved design of the curved plates 11 not only increases the contact area with the inner ring 2, but also allows for a certain degree of heat diffusion along the curved surface during heat transfer, preventing heat from being concentrated at a single point. The multiple heat sinks 13 on one side of each curved plate 11 further enhance the heat dissipation effect. The heat sinks 13 increase the heat dissipation surface area of the curved plates 11. According to the principles of heat transfer, a larger heat dissipation surface area can improve the heat exchange efficiency with the surrounding air. When the heat on the curved plate 11 is transferred to the heat sink 13, the heat sink 13 dissipates the heat into the air through contact with the surrounding air.

[0032] The multiple arc-shaped plates 11 arranged axially and tilted between the inner ring 2 and the outer ring 1 of the bracket not only play a supporting role, but also form a structure similar to a turbine. When the motor shaft rotates, the arc-shaped plates 11 will rotate along with it. Due to their special tilted structure and distribution, they can disturb the airflow inside the motor like a turbine, and the rotation disturbance of the arc-shaped plates 11 increases the flow rate of the airflow inside the motor. The increase in airflow speed means that more air flows through the surface of the heat sink 13 per unit time. According to the principle of heat exchange, when the air flow rate is accelerated, the heat exchange efficiency between the heat sink 13 and the air will be significantly improved. This is because the rate of heat transfer is related to the temperature difference and the heat transfer coefficient, and the increase in airflow speed will increase the heat transfer coefficient. Therefore, the disturbance of the airflow by the arc-shaped plates 11 increases the flow rate of the airflow inside the motor, thereby improving the heat exchange effect, so that the heat inside the motor can be transferred to the air more quickly, further enhancing the heat dissipation effect inside the motor.

[0033] Reference Figures 1-4The arc-shaped plate 11 is located above the inner ring 2 and contacts the inner ring 2. A plurality of groups of placement blocks 9 are provided between the outer ring 1 and the inner ring 2 of the bracket. The number of placement blocks 9 in each group is set to two. Each group of placement blocks 9 is respectively connected to the corresponding outer ring 1 and inner ring 2 of the bracket. A placement groove 5 is formed between the two placement blocks 9. The two ends of the arc-shaped plate 11 are respectively located inside the corresponding placement groove 5. Two connecting plates 12 are fixedly connected to both ends of each arc-shaped plate 11. A through hole is opened inside each connecting plate 12. A plurality of mounting holes 10 are provided inside the outer ring 1 of the bracket. Each through hole corresponds to the mounting hole 10 one by one. Bolts 8 are provided inside every two corresponding through holes and mounting holes 10. Each arc-shaped plate 11 is connected to the support plate 4 by bolts 8.

[0034] During installation, the curved plate 11 is placed within the slots 5 of the two placement blocks 9. The slots 5 provide precise positioning. The placement blocks 9 are connected to the outer ring 1 and inner ring 2 of the bracket, forming a stable support structure. Once the curved plate 11 is placed in the slots 5, its position is initially determined, limiting its horizontal movement and ensuring accurate installation in the intended location.

[0035] The curved plate 11 contacts the inner ring 2, creating a natural fit during installation for easy positioning. It also facilitates rapid heat transfer from the inner ring 2 to the curved plate 11 during motor operation. The inner ring 2, a heat-concentrating area within the motor, is in direct contact with the curved plate 11, facilitating direct heat transfer and facilitating subsequent heat dissipation.

[0036] After the curved plate 11 is placed in the placement slot 5, the through-holes on the connecting plates 12 at both ends align with the mounting holes 10 on the bracket outer ring 1. Bolts 8 are then installed in the corresponding through-holes and mounting holes 10, and the curved plate 11 is secured by tightening the bolts 8. The bolted connection provides reliable mechanical fastening, firmly securing the curved plate 11 between the bracket outer ring 1 and inner ring 2.

[0037] During motor operation, the curved plate 11 may become damaged due to long-term exposure to factors such as thermal stress, mechanical vibration, and corrosion. For example, the heat sink 13 may crack due to frequent thermal expansion and contraction, or the curved plate 11 itself may deform. If the curved plate 11 is removable, maintenance personnel can easily remove the damaged curved plate 11 and perform targeted repairs, such as replacing damaged heat sinks 13 or repairing deformed parts, without having to disassemble the entire motor. This not only saves maintenance time but also reduces maintenance costs.

[0038] Reference Figure 2-Figure 3Two groups of ventilation holes 3 are opened inside the inner ring 2, and the number of ventilation holes 3 in each group is set to multiple. A connecting ring 6 is provided at the bottom of the inner ring 2, and a reinforcing rod 7 is fixedly connected to the outer wall of the connecting ring 6. The outer end of the reinforcing rod 7 is connected to the outer ring 1 of the bracket.

[0039] The vents 3 not only promote natural convection of air but also directly participate in the heat dissipation process. When hot air flows through the vents 3, the heat is transferred along with the air flow. The inner wall of the vents 3 is in contact with the air, and the heat can be transferred to the wall of the vents 3 by heat conduction, and then transferred to the surrounding air by the wall. In addition, the air flowing in the vents 3 will also exchange heat with the wall of the inner ring 2, further removing the heat from the inner ring 2. In this way, the vents 3 effectively enhance the heat dissipation effect inside the motor and help reduce the overall temperature of the motor.

[0040] The connecting ring 6 is located at the bottom of the inner ring 2 and is connected to the outer ring 1 of the support via a reinforcing rod 7. This connection method serves to strengthen the structural stability between the inner ring 2 and the outer ring 1 of the support.

[0041] Working Principle: When the motor is running, copper loss in the stator winding and iron loss in the core generate heat, raising the internal temperature. This heat is then rapidly transferred to the inner ring 2, which has good thermal conductivity, through heat conduction. The heat from the inner ring 2 is then transferred to the curved plate 11 in contact with it. Curved plates 11 are evenly distributed along the axis of the inner ring 2 and are curved in shape. This increases the contact area for uniform heat transfer and allows heat to diffuse across the curved surface. Fins 13 on one side of the curved plate 11 increase the surface area for heat dissipation, allowing the heat to be dissipated into the air.

[0042] At the same time, the axially inclined curved plate 11 between the inner ring 2 and the outer ring 1 of the bracket rotates with the motor shaft. Its turbine-like structure disturbs the airflow and increases its velocity. This allows more air to flow over the surface of the heat sink 13 per unit time, improving the heat transfer coefficient between the heat sink 13 and the air, enhancing the heat dissipation effect, and allowing heat from the motor to be transferred away more quickly.

[0043] As the motor heats up, hot air flows upward through vents 3, promoting natural convection. This air conducts heat to the walls of vents 3 and then to the surrounding air. Simultaneously, it exchanges heat with the walls of inner ring 2, effectively enhancing heat dissipation and reducing the overall motor temperature. A connecting ring 6 at the bottom of inner ring 2 is connected to the bracket's outer ring 1 via reinforcing rods 7, enhancing structural stability and effectively transmitting and dissipating forces. This prevents breakage or deformation of the inner ring 2 and bracket's outer ring 1, ensuring proper motor operation.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A brushless motor rotor bracket assembly, characterized in that: include: A bracket outer ring (1), an inner ring (2) is provided on the inner side of the bracket outer ring (1), a support plate (4) is provided between the bracket outer ring (1) and the inner ring (2); a heat dissipation component is provided on the top of the inner ring (2); The heat dissipation component is used to improve the heat exchange effect, and includes a curved plate (11). The number of the curved plates (11) is set to be multiple, and the multiple curved plates (11) are evenly distributed along the axis of the inner ring (2). A plurality of heat dissipation fins (13) are provided on one side of each of the curved plates (11), and the plurality of heat dissipation fins (13) are used to increase the heat dissipation surface area of the curved plate (11).

2. The brushless motor rotor bracket assembly according to claim 1, characterized in that: The arc-shaped plate (11) is located above the inner ring (2) and is in contact with the inner ring (2).

3. The brushless motor rotor bracket assembly according to claim 1, characterized in that: A plurality of groups of placement blocks (9) are provided between the outer ring (1) and the inner ring (2) of the bracket, and the number of the placement blocks (9) in each group is set to two. Each group of the placement blocks (9) is respectively connected to the corresponding outer ring (1) and inner ring (2) of the bracket, and a placement groove (5) is formed between the two placement blocks (9).

4. The brushless motor rotor support assembly according to claim 3, characterized in that: The two ends of the arc-shaped plate (11) are respectively located inside the corresponding placement groove (5), and the two ends of each arc-shaped plate (11) are fixedly connected to two connecting plates (12).

5. The brushless motor rotor bracket assembly according to claim 4, characterized in that: A through hole is provided inside each of the connecting plates (12), and a plurality of mounting holes (10) are provided inside the outer ring of the bracket (1), and each of the through holes corresponds to a mounting hole (10) on a one-to-one basis.

6. The brushless motor rotor support assembly according to claim 5, characterized in that: Bolts (8) are provided inside each of the two corresponding through holes and the mounting hole (10), and each of the arc-shaped plates (11) and the support plate (4) are connected via the bolts (8).

7. The brushless motor rotor support assembly according to claim 1, characterized in that: Two groups of ventilation holes (3) are provided inside the inner ring (2), and the number of ventilation holes (3) in each group is set to be multiple.

8. The brushless motor rotor bracket assembly according to claim 1, characterized in that: A connecting ring (6) is provided at the bottom of the inner ring (2), and a reinforcing rod (7) is fixedly connected to the outer wall of the connecting ring (6), and the outer end of the reinforcing rod (7) is connected to the bracket outer ring (1).

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