Permanent magnet brushless motor rotor

Abstract

The utility model discloses a permanent magnet brushless motor rotor, which comprises a rotor iron core and a shaft hole arranged in the middle of the rotor iron core, and balance blocks are diagonally arranged at two ends of the rotor iron core. The stainless steel end plates are symmetrically arranged at the two ends of the rotor core, the balance blocks are arranged on the sides, away from the rotor core, of the stainless steel end plates, and the rotor core, the stainless steel end plates and the balance blocks are fixed through rivets. According to the permanent magnet brushless motor rotor, the counterbalances are diagonally arranged at the two ends of the rotor iron core, so that the amount of unbalance generated in different directions and positions can be more comprehensively dealt with, meanwhile, a possible symmetric vibration mode can be broken, and the possibility of resonance is reduced.

Description

Technical Field

[0001] The utility model relates to the field of permanent magnet brushless motor rotors, and particularly relates to a permanent magnet brushless motor rotor. Background Technique

[0002] As a core component of a permanent magnet brushless motor, the permanent magnet brushless motor rotor is widely used in many fields such as industrial control, household appliances, and transportation. In the future, its performance will continue to improve and the application scenarios will be more extensive.

[0003] At present, the existing permanent magnet brushless motor rotors are generally composed of a rotor core and magnets. Most of the permanent magnet brushless motor rotors lack a balance structure and are prone to vibration and noise due to imbalance. Although some rotors are provided with balance weights, the balance weights are generally arranged axially symmetrically, and axial symmetry is prone to resonance and it is difficult to adapt to complex imbalance conditions.

[0004] Therefore, it is very necessary to propose a permanent magnet brushless motor rotor to solve the above problems. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a permanent magnet brushless motor rotor, which can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A permanent magnet brushless motor rotor includes a rotor core and a shaft hole provided in the middle of the rotor core. Balance weights are arranged diagonally at both ends of the rotor core;

[0008] Stainless steel end plates are symmetrically arranged at both ends of the rotor core. The balance weights are arranged on the side of the stainless steel end plates away from the rotor core, and the rotor core, the stainless steel end plates, and the balance weights are fixed by rivets.

[0009] Preferably, rotor slots are uniformly arranged on the inner circumference of the rotor core, and the inner wall of the rotor slot is an arc surface.

[0010] Preferably, perforations adapted to the rivets are uniformly arranged on the rotor core, the stainless steel end plates, and the balance weights. The rivets are fixed by passing through the perforations, and the number of rivets is four, and each balance weight corresponds to two rivets.

[0011] Preferably, magnets are arranged on the inner side of the outer periphery of the rotor core, and the magnets are permanent magnets.

[0012] Preferably, through slots corresponding to and adapted to the rotor slots and the shaft hole are arranged on the stainless steel end plates.

[0013] Preferably, the balance weights are made of brass.

[0014] Preferably, an arc adapted to the outer periphery of the rotor core is provided on the outer periphery of the balance weight, and an arc-shaped depression corresponding to and adapted to the shaft hole is provided at one end of the balance weight close to the shaft hole.

[0015] Compared with the prior art, the present utility model provides a permanent magnet brushless motor rotor, which has the following beneficial effects:

[0016] For this permanent magnet brushless motor rotor, balance weights are arranged diagonally at both ends of the rotor core. The diagonal arrangement can more comprehensively cope with the unbalance generated in different directions and positions. At the same time, it also helps to break the possible symmetric vibration mode, reduce the possibility of resonance, improve the rotational dynamics performance of the rotor, reduce torque fluctuations and energy losses during rotation, improve the operating efficiency and stability of the motor, and the balance weight is made of brass, which has good mechanical properties and corrosion resistance and can maintain stable performance in various environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of the present utility model;

[0018] Figure 2 is a schematic structural view of the present utility model in a disassembled state.

[0019] In the figure: 1, rotor core; 2, balance weight; 3, stainless steel end plate; 4, rotor slot; 5, rivet; 6, shaft hole; 7, magnet; 8, perforation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Such as Figure 1-2As shown in the figure, a permanent magnet brushless motor rotor includes a rotor core 1 and a shaft hole 6 provided in the middle of the rotor core 1. Balancing blocks 2 are diagonally arranged at both ends of the rotor core 1. By arranging the balancing blocks 2 diagonally at both ends of the rotor core 1, the diagonal arrangement can more comprehensively cope with the unbalance generated in different directions and positions. At the same time, it also helps to break the possible symmetric vibration mode, reduce the possibility of resonance, improve the rotational dynamics performance of the rotor, reduce torque fluctuations and energy losses during rotation, and improve the operating efficiency and stability of the motor. The balancing block 2 is made of brass, which has good mechanical properties and corrosion resistance, and can maintain stable performance in various environments. Secondly, brass has high oxidation resistance and chemical stability, which can effectively avoid the damage and corrosion of the balancing block caused by environmental factors. In addition, brass has excellent processing performance and can be easily made into various shapes of balancing blocks to meet the needs of different motors. An arc-shaped part adapted to the outer periphery of the rotor core 1 is arranged on the outer periphery of the balancing block 2, and an arc-shaped depression corresponding to and adapted to the shaft hole 6 is arranged at one end of the balancing block 2 close to the shaft hole 6;

[0022] Stainless steel end plates 3 are symmetrically arranged at both ends of the rotor core 1, and the balancing blocks 2 are arranged on the side of the stainless steel end plates 3 away from the rotor core 1. By arranging the stainless steel end plates 3, the overall rigidity of the rotor can be increased, the deformation that may occur during high-speed rotation of the rotor can be reduced, so as to ensure the concentricity and dynamic balance of the rotor, improve the operating stability and reliability, and at the same time help to optimize the magnetic field distribution, reduce magnetic leakage, improve the electromagnetic efficiency and power factor of the motor. Moreover, in some cases, it can bear the axial force, reduce the axial movement, protect the bearing and other related components. The rotor core 1, the stainless steel end plate 3, and the balancing block 2 are fixed by rivets 5. Perforations 8 adapted to the rivets 5 are uniformly arranged on the rotor core 1, the stainless steel end plate 3, and the balancing block 2. The rivets 5 are fixed by passing through the perforations 8. The number of rivets 5 is four, and each balancing block 2 corresponds to two rivets 5.

[0023] Furthermore, rotor slots 4 are uniformly arranged on the inner periphery of the rotor core 1, and the inner wall of the rotor slot 4 is an arc surface. The rotor slots 4 can increase the surface area of the rotor. A larger surface area means that more heat can be exchanged with the surrounding environment. When the rotor rotates, the presence of the slots will change the flow pattern of the surrounding air, forming a more complex air flow, enhancing the convective heat transfer of the air. The air can flow through the rotor surface more effectively, taking away the heat. Reducing the temperature of the rotor can reduce the resistance loss and magnetic loss, thereby improving the efficiency of the motor;

[0024] In addition, through slots corresponding to and adapted to the rotor slots 4 and the shaft hole 6 are arranged on the stainless steel end plate 3, which is convenient for the insertion of the motor shaft and the discharge of the heat of the rotor slots 4.

[0025] Further, a magnet 7 is provided on the inner side of the periphery of the rotor core 1, and the magnet 7 is a permanent magnet. By setting the magnet 7 as a permanent magnet, the permanent magnet can generate a constant magnetic field without consuming external electric energy, reducing energy loss, improving the efficiency of the motor, and at the same time being able to generate a strong magnetic field in a relatively small volume, which helps to realize the miniaturization and light weight of the motor, and at the same time provides a high power output. Moreover, since there is no need for an exciting current to establish a magnetic field, the response speed of the motor is faster, the dynamic performance is better, the magnetic field stability of the permanent magnet is higher, it is not easily affected by external factors, the possibility of failure occurrence is reduced, and the reliability and stability of the motor operation are improved.

[0026] During installation, place the stainless steel end plates 3 at both ends of the rotor core 1, place the stainless steel end plates 3 outside the balance weights 2, adjust the positions of the balance weights 2 and the stainless steel end plates 3, pass a plurality of rivets 5 through the through holes 8, and then fix and lock them.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet brushless motor rotor, comprising a rotor core (1) and a shaft hole (6) provided in the middle of the rotor core (1), characterized in that: Balancing blocks (2) are arranged diagonally at both ends of the rotor core (1); Stainless steel end plates (3) are symmetrically arranged at both ends of the rotor core (1). The balancing blocks (2) are arranged on the side of the stainless steel end plates (3) away from the rotor core (1), and the rotor core (1), the stainless steel end plates (3), and the balancing blocks (2) are fixed by rivets (5).

2. The rotor of a permanent magnet brushless motor according to claim 1, characterized in that: Rotor slots (4) are evenly arranged on the inner circumference of the rotor core (1), and the inner walls of the rotor slots (4) are arc-shaped surfaces.

3. A permanent magnet brushless motor rotor according to claim 1, characterized in that: Perforations (8) adapted to the rivets (5) are evenly arranged on the rotor core (1), the stainless steel end plates (3), and the balancing blocks (2). The rivets (5) are fixed by passing through the perforations (8). The number of the rivets (5) is four, and each balancing block (2) corresponds to two rivets (5).

4. A permanent magnet brushless motor rotor according to claim 1, characterized in that: Magnets (7) are arranged on the inner side of the outer circumference of the rotor core (1), and the magnets (7) are permanent magnets.

5. A permanent magnet brushless motor rotor according to claim 1, characterized in that: Through grooves corresponding to and adapted to the rotor slots (4) and the shaft holes (6) are arranged on the stainless steel end plates (3).

6. A permanent magnet brushless motor rotor according to claim 1, characterized in that: The balancing blocks (2) are made of brass.

7. A permanent magnet brushless motor rotor according to claim 1, characterized in that: An arc adapted to the outer circumference of the rotor core (1) is arranged on the outer circumference of the balancing block (2), and an arc-shaped depression corresponding to and adapted to the shaft hole (6) is arranged at one end of the balancing block (2) close to the shaft hole (6).

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