Hollow cup motor rotor structure, hollow cup motor and aircraft

Abstract

The utility model relates to a coreless motor rotor structure, a coreless motor and an aircraft, belongs to the technical field of motors, and solves the problems that the number of elements of a rotor structure needs to be additionally increased in dynamic balance structure arrangement in the rotor structure in the prior art, and the lightweight requirements of aircrafts and high-end fields are not met. The utility model provides a coreless motor rotor structure, which is provided with a rotating shaft, and further comprises a magnet yoke, a Hall magnet ring seat and a dynamic balance component which are sleeved on the rotating shaft, the magnet yoke is arranged in the middle of the rotating shaft; the Hall magnetic ring seat and the dynamic balance part are respectively arranged at two ends of the rotating shaft; the Hall magnetic ring seat is provided with a first counterweight part used for realizing a dynamic balance function. According to the utility model, the Hall magnetic ring seat is arranged as a component for dynamic balance, the number of elements and the axial length of the motor are reduced, the motor is lighter, the rotational inertia of the rotor is reduced, and the starting response speed of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a hollow cup motor rotor structure, a hollow cup motor and an aircraft. Background Art

[0002] In a motor, an unbalanced rotor structure mass will cause the axis center to shift, resulting in vibration and noise during the rotation of the rotor; when a motor with an unbalanced rotor structure is applied to aircraft and high-end fields, it directly affects the performance and safety of the aircraft, as well as the operation accuracy and stability of equipment in high-end fields.

[0003] Therefore, it is very important to set a dynamic balance structure for the motor rotor structure. However, the existing rotor dynamic balance structure in the design needs to additionally set dynamic balance components at both ends of the rotating shaft, increasing the number of components of the rotor structure and the mass of the rotor and the motor, which does not meet the lightweight requirements in aircraft and high-end fields. Summary of the Utility Model

[0004] Aiming at the problem that the existing dynamic balance structure components of the hollow cup motor rotor structure need to additionally increase the number of components of the rotor structure, which does not meet the lightweight requirements in aircraft and high-end fields, the utility model provides a hollow cup motor rotor structure, a hollow cup motor and an aircraft.

[0005] The utility model is realized through the following solutions:

[0006] The utility model provides a hollow cup motor rotor structure, which has a rotating shaft and includes a magnetic yoke, a Hall magnetic ring seat and a dynamic balance component sleeved on the rotating shaft;

[0007] The magnetic yoke is arranged in the middle of the rotating shaft;

[0008] The Hall magnetic ring seat and the dynamic balance component are respectively arranged at both ends of the rotating shaft;

[0009] The Hall magnetic ring seat has a first counterweight part for realizing the dynamic balance function.

[0010] Further, the Hall magnetic ring seat has an outer side wall, and the outer side wall is configured as the first counterweight part.

[0011] Further, it further includes a Hall magnetic ring; a circular groove is arranged on the end face of the Hall magnetic ring seat close to the end of the rotating shaft, and the Hall magnetic ring is embedded in the circular groove.

[0012] Further, the Hall magnetic ring seat is attached to the magnetic yoke.

[0013] Further, the Hall magnetic ring seat and / or the dynamic balance component is a hollow annular structure.

[0014] Further, the dynamic balance component is attached to the yoke; the dynamic balance component has a second counterweight portion.

[0015] Further, a magnet assembly is further included, and the magnet assembly is disposed outside the yoke; the magnet assembly includes an N-pole magnet and an S-pole magnet; the N-pole magnets and the S-pole magnets are circumferentially and alternately distributed on the outer surface of the yoke, and there is no gap between adjacent N-pole magnets and S-pole magnets.

[0016] Further, a material wire made of a non-magnetic-separating material is wound around the outer surface of the magnet assembly.

[0017] In the second aspect of the present invention, a coreless motor is provided, including the coreless motor rotor structure described above.

[0018] In the third aspect of the present invention, an aircraft is provided, including the coreless motor described above.

[0019] Compared with the prior art, the present utility model can at least achieve one of the following beneficial effects:

[0020] (1) Compared with the prior art, in order to save the space of the rotating shaft, reduce the number of components, and make the rotor and the motor lighter, the present utility model provides that the working component located at the end of the rotor has a dynamic balance function. Specifically, a counterweight portion is provided on the Hall magnetic ring seat, so that the Hall magnetic ring seat has a dynamic balance function, avoiding the additional setting of a component for achieving dynamic balance at one end of the Hall magnetic ring seat, shortening the axial length of the motor, making the motor lighter, reducing the rotational inertia of the rotor, and improving the starting response speed of the motor.

[0021] (2) In the present utility model, the outer side wall of the Hall magnetic ring seat is set as a counterweight portion. One end face of the Hall magnetic ring seat is attached to the yoke, and the other end face is used for embedding the Hall magnetic ring. The outer side wall is the non-working portion of the Hall magnetic ring seat. Since the dynamic balance operation is carried out after the assembly of the rotor structure is completed, the counterweight portion is provided on the outer side wall of the Hall magnetic ring seat, which is convenient for operation on the one hand and does not affect other functions of the Hall magnetic ring seat on the other hand.

[0022] (3) The Hall magnetic ring seat and the dynamic balance component are respectively disposed at both ends of the rotating shaft, and are attached to the yoke and the magnet assembly, preventing the yoke or the magnet assembly from shaking, and contributing to improving the running stability of the yoke and the magnet assembly.

[0023] (4) In the present utility model, the Hall magnetic ring seat and the dynamic balance component are set as a hollow annular structure. On the one hand, it can be sleeved on the rotating shaft, which is convenient for installation; on the other hand, the dynamic balance amount of the hollow annular structure is the smallest, which can improve the adjustment efficiency of dynamic balance.

[0024] (5) In this utility model, the magnet assembly has a split structure, including an N-pole magnet and an S-pole magnet, and magnets of different polarities are alternately installed circumferentially. This can optimize the rotor magnetic circuit, improve the magnetic flux penetration ability of the motor, reduce the magnetic leakage rate, and effectively improve the efficiency and power density of the motor.

[0025] (6) In this utility model, the magnet assembly is arranged on the outer surface of the yoke, and a material wire made of a non-magnetic-separating material is tightly wound around the outside of the magnet assembly, covering the entire outer surface of the magnet assembly. The material wire made of a non-magnetic-separating material has no magnetic separation phenomenon and does not affect the magnetic force. The winding of the material wire made of a non-magnetic-separating material can fasten the magnet on the yoke, improve the motor efficiency, reduce the air-gap noise, and improve the running reliability of the motor.

[0026] In this utility model, the above technical solutions can also be combined with each other to achieve more preferred combination schemes. Other features and advantages of this utility model will be described in the subsequent description, and some advantages can be made obvious from the description, or can be understood by implementing this utility model. The purpose and other advantages of this utility model can be achieved and obtained from the content specifically pointed out in the description and the drawings. Description of the Drawings

[0027] The drawings are only for the purpose of showing specific embodiments and are not considered as a limitation of this utility model. Throughout the drawings, the same reference signs represent the same components.

[0028] Figure 1 is a cross-sectional view of the hollow-cup rotor structure of this utility model;

[0029] Figure 2 is an exploded view of the parts of the hollow-cup motor rotor assembly of this utility model;

[0030] Figure 3 is a structural diagram of the Hall magnetic ring seat of this utility model;

[0031] Figure 4 is a structural diagram of the dynamic balance component of this utility model;

[0032] Figure 5 is a structural diagram of the carbon fiber wire winding of this utility model.

[0033] Reference Signs:

[0034] 1 - Rotating shaft, 2 - Yoke, 3 - Hall magnetic ring seat, 301 - Annular groove, 302 - First counterweight part, 4 - Hall magnetic ring, 5 - Dynamic balance component, 501 - Second counterweight part, 6 - Magnet assembly, 601 - N-pole magnet, 602 - S-pole magnet, 7 - Carbon fiber wire. Detailed Embodiments

[0035] The preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. The accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principles of the present invention, and are not used to limit the scope of the present invention.

[0036] A specific embodiment of the present invention is as Figure 1 and Figure 2 shown, which discloses a motor rotor structure having a rotating shaft 1, including a magnetic yoke 2, a Hall magnetic ring seat 3, and a dynamic balance component 5. Among them, the rotating shaft 1 is set as a smooth shaft structure, and the magnetic yoke 2 and the dynamic balance component 5 are sleeved on the rotating shaft 1.

[0037] The magnetic yoke 2 is made of a magnetic conductive material and is used to fixedly support the magnet assembly 6 to ensure the stable and reliable operation of the magnet assembly 6 during the operation of the motor. The magnetic yoke 2 is a solid block structure and can be formed by conventional machining methods.

[0038] The magnetic yoke 2 is provided with a round hole, and the magnetic yoke 2 is fixedly installed on the middle part of the rotating shaft 1 through the round hole, and the fixing method is welding, interference fit or small clearance fit and bonding.

[0039] In order to save the space of the rotating shaft 1, reduce the number of components, and make the rotor and the motor lighter, the working components located at the ends of the rotating shaft 1 are set to have a dynamic balance function. Exemplarily, in this embodiment, the Hall magnetic ring seat 3 is set to have a dynamic balance function. The Hall magnetic ring seat 3 and the dynamic balance component 5 are arranged at both ends of the magnetic yoke 2. The Hall magnetic ring seat 3 has a first counterweight portion 302, and the dynamic balance component 5 has a second counterweight portion 501. The first counterweight portion 302 and the second counterweight portion 501 are used to adjust the dynamic balance of the rotor structure by counterweight after the rotor structure is installed.

[0040] Considering that the components with dynamic balance function need to adjust the mass at both ends of the rotating shaft 1 by adding weight or reducing weight, etc., in order to avoid affecting the magnetic circuit of the rotor, the materials of the Hall magnetic ring seat 3 and the dynamic balance component 5 are non-magnetic conductive materials.

[0041] Furthermore, the hollow ring structure has the smallest dynamic balance amount, and is easy to install and convenient to adjust the balance. Therefore, the components with dynamic balance function are set to have a hollow ring structure to improve the adjustment efficiency of dynamic balance. The hollow ring structure is composed of a through hole in the middle and a wall or shell layer surrounding the through hole.

[0042] As Figure 3As shown, the Hall magnetic ring seat 3 is a hollow ring structure with a through hole in the middle for sleeving on the rotating shaft 1. The outside of the through hole is a housing with an annular groove 301, and a Hall magnetic ring 4 is arranged in the annular groove 301. The end face of the Hall magnetic ring seat 3 where the Hall magnetic ring 4 is arranged faces the end of the rotating shaft 1, and the other end face of the Hall magnetic ring seat 3 is attached to the end of the magnetic yoke 2 to better fix the magnetic yoke 2 and prevent the magnetic yoke 2 and the magnet assembly 6 mounted thereon from coming off or shaking during the high-speed rotation of the rotor.

[0043] As Figure 4 shown, the dynamic balance component 5 is a hollow ring structure with a through hole in the middle for sleeving on the rotating shaft 1. The outside of the through hole is a wall surface. One end face of the dynamic balance component 5 is attached to the end of the magnetic yoke 2 to better fix the magnetic yoke 2 and prevent the magnetic yoke 2 and the magnet assembly 6 mounted thereon from coming off or shaking during the high-speed rotation of the rotor.

[0044] Considering that the outer side wall of the Hall magnetic ring seat 3 is a non-working part, operating on it does not affect the operation of the motor. The dynamic balance operation is carried out after all components are assembled, and the outer side wall is easy to process and operate. The outer side wall of the Hall magnetic ring seat 3 is set as the first counterweight part 302.

[0045] The fixing method of the dynamic balance component 5 and the rotating shaft 1 is welding, interference fit or small clearance fit and bonding. As Figure 4 shown, considering that the outer end of the dynamic balance component 5 away from the magnetic yoke 2 is easy to operate, the outer end of the dynamic balance component 5 is set as the second balance part 501.

[0046] After the components of the rotor are assembled, counterweight operations are carried out on the first counterweight part 302 and the second counterweight part 501 to adjust the mass at both ends of the rotor to achieve the preset dynamic balance amount.

[0047] Compared with the prior art, in this embodiment, a counterweight part is provided on the working component arranged at the end of the rotating shaft 1, enabling it to have a dynamic balance function, avoiding the additional setting of components for dynamic balance at this end, reducing the number of components, shortening the axial length of the motor, making the motor lighter, reducing the moment of inertia of the rotor, and improving the starting response speed of the motor. Setting the easy-to-operate non-working part of the working component with a dynamic balance function as the counterweight part can achieve the dynamic balance operation without affecting the operation of the rotor.

[0048] The rotor structure further includes a magnet assembly 6. The magnet assembly 6 is surface-mounted on the outer surface of the magnetic yoke 2 and is evenly distributed circumferentially on the outer surface of the magnetic yoke 2. The inner surface of the magnet assembly 6 matches the shape of the outer surface of the magnetic yoke 2.

[0049] The magnet assembly 6 is arranged in a split structure, including an N-pole magnet 601 and an S-pole magnet 602. The N-pole magnet 601 and the S-pole magnet 602 are installed circumferentially and staggeredly, and there is no gap between adjacent N-pole magnet 601 and S-pole magnet 602. After installation, the magnet assembly 6 forms a gapless annular structure centered on the rotating shaft 1.

[0050] In this embodiment, the magnet assembly 6 is a surface-mounted split structure, including an N-pole magnet 601 and an S-pole magnet 602, and magnets of different polarities are installed alternately in the circumferential direction, which can optimize the rotor magnetic circuit, improve the magnetic flux penetration ability of the motor, reduce the magnetic leakage rate, and effectively improve the efficiency and power density of the motor.

[0051] Furthermore, in order to prevent the magnet assembly 6 from being thrown out, falling off or moving circumferentially due to the centrifugal force generated by the high-speed rotation of the rotating shaft 1 and the radial electromagnetic force of the magnet during the operation of the motor, as Figure 5 shown, a material wire made of a non-magnetic shielding material is tightly wound around the outer surface of the magnet assembly 6. In this embodiment, it is a carbon fiber wire 7. As an alternative in this embodiment, it can also be a glass fiber or a material wire made of other non-magnetic shielding materials. The winding range of the material wire made of the non-magnetic shielding material covers the entire outer surface of the magnet assembly 6. The material wire made of the non-magnetic shielding material has no magnetic shielding phenomenon and does not affect the magnetic force, and can fasten the magnet on the magnetic yoke 2, improve the motor efficiency, reduce the air gap noise, and improve the reliability of the motor operation.

[0052] The installation method of this embodiment is as follows:

[0053] Fix the magnetic yoke 2 in the middle of the rotating shaft 1, and then fit and install the Hall magnetic ring seat 3 and the dynamic balance component 5 on the two end faces of the magnetic yoke 2; use fastening glue to staggeredly assemble the S-pole magnet 602 and the N-pole magnet 601 to the outer plane of the magnetic yoke 2 and bake and fasten them; wind and fasten the outer surface of the magnet assembly 6 with the carbon fiber wire 7 and cover the entire magnet assembly 6; install the Hall magnetic ring 4 into the annular groove 301 of the Hall magnetic ring seat 3 and fasten it with fastening glue; adjust the mass of the outer side wall of the rotor Hall magnetic ring 4 and the dynamic balance component 5 to reach the preset dynamic balance value by the rotor weight removal method or the weight reduction method; complete the installation of the rotor.

[0054] The embodiment of the present invention also provides a coreless motor, including the coreless motor rotor structure in the above embodiment. The rotor structure cooperates with the front and rear end cover bearing seats and is connected to the motor housing.

[0055] The embodiment of the present invention also provides an aircraft, including the coreless motor in the above embodiment.

[0056] Compared with the prior art, the advantages of the coreless motor and the aircraft in the embodiment of the present invention are the same as those of the coreless motor rotor structure described above, and will not be repeated here.

[0057] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A structure of a coreless motor rotor, having a rotating shaft (1), characterized in that, It further includes a yoke (2), a Hall magnetic ring seat (3) and a dynamic balance component (5) sleeved on the rotating shaft (1); The yoke (2) is arranged in the middle of the rotating shaft (1); The Hall magnetic ring seat (3) and the dynamic balance component (5) are respectively arranged at two ends of the rotating shaft (1); The Hall magnetic ring seat (3) has a first counterweight portion (302) for realizing the dynamic balance function.

2. The structure of the cup rotor motor according to claim 1, characterized in that, The Hall magnetic ring seat (3) has an outer side wall which is configured as the first counterweight portion (302).

3. The hollow cup motor rotor structure according to claim 2, characterized in that, It further includes a Hall magnetic ring (4); an annular groove (301) is arranged on the end face of the Hall magnetic ring seat (3) close to the end of the rotating shaft (1), and the Hall magnetic ring (4) is embedded in the annular groove (301).

4. The structure of the coreless motor rotor according to claim 1, wherein The Hall magnetic ring seat (3) is attached to the yoke (2).

5. The hollow cup motor rotor structure according to claim 1, characterized in that, The Hall magnetic ring seat (3) and / or the dynamic balance component (5) is a hollow annular structure.

6. The hollow cup motor rotor structure according to claim 1, wherein The dynamic balance component (5) is attached to the yoke (2); the dynamic balance component (5) has a second counterweight portion (501).

7. The hollow cup motor rotor structure according to claim 1, characterized in that, It further includes a magnet assembly (6), and the magnet assembly (6) is arranged outside the yoke (2); the magnet assembly (6) includes an N - pole magnet (601) and an S - pole magnet (602); the N - pole magnet (601) and the S - pole magnet (602) are circumferentially and alternately distributed on the outer surface of the yoke (2), and there is no gap between adjacent N - pole magnet (601) and S - pole magnet (602).

8. The structure of the coreless motor rotor according to claim 7, wherein, A material wire made of a non - magnetic - isolating material is wound around the outer surface of the magnet assembly (6).

9. A coreless motor, characterized in that, It includes the cup - shaped motor rotor structure according to any one of claims 1 - 8.

10. An aircraft, characterized in that, It includes the cup - shaped motor according to claim 9.

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