Motor rotor structure and motor

Abstract

The invention discloses a motor rotor structure and a motor, and relates to the technical field of motors, the motor rotor structure comprises a rotor support frame and a magnetic part; the cross section of the rotor supporting frame is circular, the rotor supporting frame is long in the axis extending direction, a shaft hole is formed in the axis of the rotor supporting frame in a penetrating mode, and a driving shaft is inserted into the shaft hole and is in driving connection with the rotor supporting frame; the magnetic part is installed and fixed along the peripheral side of the rotor support frame so as to form a magnetic induction area; and the rotor support frame is made of a non-metal material. According to the technical scheme of the invention, the magnetic part is installed and fixed along the peripheral side of the rotor support frame to form the magnetic induction area, and the rotor support frame is made of a non-metal material, so that components of the rotor structure of the motor are prevented from being magnetic metal components, the lightweight design is realized, and the cost is reduced. Therefore, the starting speed of the motor is increased, and the operation is stable. The working efficiency of the motor is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor rotor structure and a motor. Background Art

[0002] The electric motor is one of the indispensable and important equipment in modern industrial production and life. It is mainly composed of two parts: the stator and the rotor. Among them, the rotor is the rotating part of the motor, and its performance directly affects the operating efficiency and stability of the motor. The traditional rotor manufacturing method mainly uses silicon steel sheets and permanent magnets. Although this method can achieve the normal operation of the rotor, due to the heavy weight of the silicon steel sheets or permanent magnets, the motor starts slowly, runs unsteadily, and has large eddy currents, which reduces the efficiency of the motor. Summary of the invention

[0003] The main purpose of the present invention is to provide a motor rotor structure and a motor, aiming to provide a motor rotor structure and a motor with fast starting speed and stable operation.

[0004] To achieve the above object, the motor rotor structure proposed in the present invention includes:

[0005] A rotor support frame, which is circular in cross section and elongated along the axis thereof, wherein an axial hole is provided at the axis center of the rotor support frame for inserting a driving shaft to drive and connect the rotor support frame; and

[0006] A magnetic part is installed and fixed along the circumference of the rotor support frame to form a magnetic induction area;

[0007] Wherein, the rotor support frame is made of non-metallic material.

[0008] In one embodiment, the magnetic part is made of plastic magnetic material; and / or,

[0009] The rotor support frame is made of polyphenylene sulfide.

[0010] In one embodiment, the magnetic part is manufactured by a pre-magnetization molding process.

[0011] In one embodiment, a flat cutout is concavely formed on the outward end surface of the magnetic portion for magnetization.

[0012] In one embodiment, the motor rotor structure further includes a mounting portion, which is disposed between the rotor support frame and the magnetic portion and is used to fix the magnetic portion.

[0013] In one embodiment, the magnetic portion is evenly divided into a plurality of magnetic blocks along the radial direction of the cross section of the rotor support frame, and the end surface of the magnetic block facing the rotor support frame is concavely provided with a first groove; and,

[0014] The mounting portion includes a plurality of first buckles, which are convexly arranged on the circumference of the rotor support frame and are arranged corresponding to the first grooves;

[0015] Wherein, the first buckle is provided with two buckle bodies in the radial direction of the rotor support frame, which are used for holding the magnetic block after being inserted into the first groove.

[0016] In one embodiment, the end surface of the magnetic block facing the rotor support frame and the edge where two magnetic blocks meet are provided with a second groove; and,

[0017] The mounting portion further includes a plurality of second buckles, which are convexly arranged on the peripheral side of the rotor support frame and are arranged corresponding to the second grooves;

[0018] Wherein, the second buckle is provided with a buckle body in the radial direction of the rotor support frame, which is used for transmitting torque to the magnetic block after being inserted into the second groove.

[0019] In one embodiment, a driving block is protruding from the shaft hole, and the driving block is used to be inserted into a keyway of the driving shaft to drive and connect the driving shaft.

[0020] In one embodiment, two driving blocks are protruded and arranged opposite to each other at an interval.

[0021] The present invention further provides a motor, comprising a motor rotor structure as described in any one of the above items.

[0022] The technical solution of the present invention adopts the magnetic part to be installed and fixed along the circumferential side of the rotor support frame to form a magnetic induction area, and the rotor support frame is set with a non-metallic material, thereby avoiding that the components of the rotor structure of the motor are all magnetic metal components, thereby achieving a lightweight design, making the starting speed of the motor faster and the operation smoother; and because the rotor support frame is made of non-metallic material, the generation of eddy currents and vortexes is avoided, thereby avoiding the possibility of overheating of the motor rotor structure, that is, protecting the motor, and also improving the working efficiency of the motor and reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic structural diagram of an embodiment of a motor rotor structure provided by the present invention;

[0025] Figure 2 for Figure 1 Magnetic pole distribution map.

[0026] Description of Figure Numbers:

[0027] 100. Motor rotor structure; 1. Rotor support frame; 11. Shaft hole; 111. Drive block; 2. Magnetic part; 2. Flat cutout; 22. Magnetic block; 3. Mounting part; 31. First buckle; 311. Buckle body; 32. Second buckle.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The electric motor is one of the indispensable and important equipment in modern industrial production and life. It is mainly composed of two parts: the stator and the rotor. Among them, the rotor is the rotating part of the motor, and its performance directly affects the operating efficiency and stability of the motor. The traditional rotor manufacturing method mainly uses silicon steel sheets and permanent magnets. Although this method can achieve the normal operation of the rotor, due to the heavy weight of the silicon steel sheets or permanent magnets, the motor starts slowly, runs unsteadily, and has large eddy currents, which reduces the efficiency of the motor.

[0033] In order to solve the above problems, the present invention proposes a motor rotor structure and a motor, aiming to provide a motor rotor structure and a motor with fast starting speed and stable operation. Figure 1 A schematic structural diagram of an embodiment of a motor rotor structure provided by the present invention.

[0034] Please refer to Figure 1 In one embodiment of the present invention, the motor rotor structure 100 includes a rotor support frame 1 and a magnetic part 2; the rotor support frame 1 is circular in cross section and elongated along the axis extension direction thereof, and an axial hole 11 is penetrated at the axis center of the rotor support frame 1 for inserting a drive shaft to drive and connect the rotor support frame 1; the magnetic part 2 is installed and fixed along the circumference of the rotor support frame 1 to form a magnetic induction area; wherein, the rotor support frame 1 is made of non-metallic material.

[0035] The technical solution of the present invention adopts the magnetic part 2 to be installed and fixed along the circumferential side of the rotor support frame 1 to form a magnetic induction area, and the rotor support frame 1 is set with a non-metallic material, thereby avoiding that the components of the rotor structure of the motor are all magnetic metal components, thereby achieving a lightweight design, so that the starting speed of the motor is faster and the operation is smooth; and because the rotor support frame 1 is made of non-metallic material, the generation of eddy currents and vortexes is avoided, thereby avoiding the possibility of overheating of the motor rotor structure 100, that is, protecting the motor, and also improving the working efficiency of the motor and reducing the manufacturing cost.

[0036] In addition, the magnetic part 2 is made of plastic magnetic material; and / or the rotor support frame 1 is made of polyphenylene sulfide material. It is understandable that in some embodiments, the rotor support frame 1 is made of non-metallic material, but the magnetic part 2 is still made of metal material. However, as long as the rotor is made of metal material, eddy currents and vortices will be generated in its metal part, which will cause the motor rotor structure 100 to overheat, and then cause the motor to malfunction, etc. In addition, since the motor rotor structure 100 will generate centrifugal force when rotating at high speed, and the centrifugal force is proportional to the mass, as mentioned above, if the magnetic part 2 is made of metal material, the centrifugal force must be very large. With this arrangement, the motor rotor structure 100 is prone to disintegration during operation. Therefore, in order to further reduce the weight of the design, the magnetic part 2 is made of plastic magnetic material. On the one hand, the problem of overheating of the motor rotor structure 100 caused by eddy currents and vortices caused by the use of metal materials can be avoided. On the other hand, since plastic magnetic materials are used, their density is much smaller than that of metal materials. Therefore, under the same volume, plastic magnets are lighter and meet the lightweight design. At the same time, the magnetic part 2 made of the plastic magnetic material is lighter, and thus the centrifugal force received by the magnetic part 2 during the operation of the motor is smaller, so that when the motor is running at high speed, the magnetic part 2 will not be easily affected by excessive centrifugal force and separate from the rotor support frame 1. In this way, the motor rotor structure 100 realizes a lightweight design, which makes the starting speed of the motor faster and the operation smoother; it also improves the working efficiency of the motor and reduces the manufacturing cost.

[0037] Specifically, in this embodiment, we selected TRP-L740 as the plastic magnetic material, which has a magnetic energy product of 37.4 kJ / m3, a coercive force of 325 kA / m, and a tensile strength greater than 70 MPa. This material has high magnetic energy product, good coercive force and high tensile strength, which can meet our requirements for the performance of plastic magnetic material molded rotors.

[0038] In addition, the rotor support frame 1 is made of polyphenylene sulfide material with good molding and high strength. Polyphenylene sulfide is a new type of high-performance thermoplastic resin with many excellent properties. Among them:

[0039] 1. High mechanical strength: Polyphenylene sulfide has high mechanical strength and can withstand large external forces. Therefore, it can be used in high-speed rotating motors. The self-load caused by high-speed rotation will not fail easily, thereby ensuring the reliability of the motor.

[0040] 2. High temperature resistance: Its melting point is 285-300°C, and it can still maintain excellent physical properties at high temperatures. In this way, in some high temperature environments, the rotor support frame 1 can still maintain good properties for high-speed rotation and operation, ensuring that the motor can still operate in high temperature environments.

[0041] 3. Chemical resistance: It can remain stable in a variety of chemical substances and is not easily corroded.

[0042] 4. Flame retardant: It has a high limiting oxygen index, will not drip when encountering an open flame, and can be extinguished quickly. In this way, in some dangerous situations such as fire, the motor is difficult to fail even after being burned due to its excellent flame retardant properties, ensuring the safety of the motor.

[0043] 5. Good thermal stability: it can maintain stable performance at high temperatures.

[0044] 6. Excellent electrical properties: excellent insulation and conductivity.

[0045] In addition, the technical solution can be applied to motors with larger output power (10kW-150kW), and the rotor support frame 1 made of plastic and the magnetic part 2 made of plastic magnetic material can reduce the weight of the motor rotor structure 100 by about 30% compared with the traditional motor, thereby reducing the inertia of the motor rotor structure 100, improving the starting response speed of the motor, and reducing the use of raw materials, thereby reducing the manufacturing cost of the motor.

[0046] In addition, the magnetic part 2 is made by a pre-magnetization molding process. It can be understood that in order to further enhance the properties of the motor and improve the performance of the motor, the magnetic part 2 is made by a pre-magnetization molding process. Figure 2 Pre-magnetization is performed to shape the magnetic block 22 of the magnetic part 2 of the plastic magnet, thereby ensuring smooth magnetic properties on the surface of the plastic magnet, improving the NVH performance of the motor rotor structure 100, and further improving the performance of the motor.

[0047] In addition, please refer to Figure 1 , the end surface of the magnetic part 2 facing outward is concavely provided with a flat cutout 21 for magnetization. It can be understood that the magnetic part 2 in this embodiment is not made of permanent magnetic material, so it is necessary to regularly magnetize the motor rotor structure 100 during daily maintenance. Therefore, the end surface of the magnetic part 2 facing outward is concavely provided with the flat cutout 21 to facilitate magnetization by operators during maintenance, and at the same time, ensure that the surface magnetism at the flat cutout 21 is zero, thereby facilitating magnetization on the one hand and ensuring a smooth surface magnetic shape on the other.

[0048] In addition, please refer to Figure 1, the motor rotor structure 100 also includes a mounting portion 3, which is arranged between the rotor support frame 1 and the magnetic portion 2, for fixing the magnetic portion 2. It can be understood that since the magnetic portion 2 is installed on the peripheral side of the rotor support frame 1, that is, the distance between the magnetic portion 2 and the rotor support frame 1 to the axis is different, and it is well known that at the same angular velocity, the farther away from the rotation center, the greater the centrifugal force, and the more it has a tendency to deviate from the center of the rotor support frame 1, and then as the angular velocity continues to increase, until it is destroyed, so, this does not meet the original intention of the present application, in order to ensure the structural stability of the motor rotor structure 100 during operation, the motor rotor structure 100 also includes the mounting portion 3, which is arranged between the rotor support frame 1 and the magnetic portion 2, and through the fixing effect of the mounting portion 3, the magnetic portion 2 is fixed on the rotor support frame 1, thereby ensuring that when the motor is running at high speed, the magnetic portion 2 will not disintegrate relative to the rotor support frame 1, thereby ensuring the reliability of the motor during operation.

[0049] For further information, please refer to Figure 1 , the magnetic part 2 is evenly divided into a plurality of magnetic blocks 22 along the radial direction of the cross section of the rotor support frame 1, and the end surface of the magnetic block 22 facing the rotor support frame 1 is concavely provided with a first groove; and the mounting part 3 includes a plurality of first buckles 31, which are convexly arranged on the peripheral side of the rotor support frame 1 and arranged corresponding to the first groove; wherein the first buckle 31 is provided with two buckle bodies 311 in the radial direction of the rotor support frame 1, which are used to hold the magnetic block 22 after being inserted into the first groove. It can be understood that in order to install the magnetic part 2 on the rotor support frame 1, the magnetic part 2 is evenly divided into a plurality of magnetic blocks 22 along the radial direction of the cross section of the rotor support frame 1, and the plurality of magnetic blocks 22 are arranged around the peripheral side of the rotor support frame 1. Through the split arrangement, the magnetic part 2 is installed on the rotor support frame 1 piece by piece through the magnetic blocks 22. Such an arrangement facilitates the assembly of the motor.

[0050] Specifically, please refer to Figure 1The first groove is concavely provided on the end surface of the magnetic block 22 facing the rotor support frame 1; and the mounting portion 3 includes a plurality of first buckles 31, which are protrudingly provided on the circumferential side of the rotor support frame 1 and corresponding to the first groove. The first buckle 31 is provided with two buckle bodies 311 in the radial direction of the rotor support frame 1, which are used to buckle the magnetic block 22 after being inserted into the first groove. In this way, the first buckle 31 protruding on the rotor support frame 1 along the radial direction of the rotor support frame 1 is inserted into the first groove of the magnetic block 22, and then the buckle body 311 of the first buckle 31 is firmly buckled with the inner wall of the first groove of the magnetic block 22, thereby ensuring that the magnetic block 22 will not be thrown out relative to the rotor support frame 1 due to the high centrifugal force generated during high-speed operation. In this way, the integrity of the motor rotor structure 100 is ensured, and thus the reliability of the motor during operation is further ensured.

[0051] For further information, please refer to Figure 1 The end surface of the magnetic block 22 facing the rotor support frame 1 and the edge where the two magnetic blocks 22 are connected are provided with a second groove; and the mounting portion 3 also includes a plurality of second buckles 32, which are protrudingly provided on the circumferential side of the rotor support frame 1 and corresponding to the second groove; wherein the second buckle 32 is provided with a buckle body 311 in the radial direction of the rotor support frame 1, which is used to transmit torque to the magnetic block 22 after being inserted into the second groove. It can be understood that in order to further ensure the integrity of the motor rotor structure 100 during operation and the reliability of the motor during operation, the second groove is recessed on the edge of the end surface of the magnetic block 22 facing the rotor support frame 1 and where the two magnetic blocks 22 are connected; and the mounting portion 3 also includes a plurality of second buckles 32, which are convexly arranged on the circumferential side of the rotor support frame 1 and are arranged corresponding to the second grooves; it can be understood that the position where the two magnetic blocks 22 are connected is also the position where the motor rotor structure 100 is most likely to be thrown off during high-speed operation. In this way, the mounting portion 3 may be arranged at this position to fix it. Specifically, the magnetic blocks 22 are connected The second groove is recessed at the position, and the second buckle 32 protruding from the rotor support frame 1 along the radial direction of the rotor support frame 1 is inserted into the second groove of the magnetic block 22, and then the buckle body 311 of the second buckle 32 is firmly buckled with the inner wall of the second groove of the magnetic block 22, thereby ensuring that the magnetic block 22 will not be thrown out relative to the rotor support frame 1 due to the high centrifugal force generated during high-speed operation. At the same time, since the second groove is formed by the recessed arrangement of the two adjacent magnetic blocks 22, the second buckle 32 can buckle the two magnetic blocks 22 at the same time, thereby further ensuring the reliability of the motor during operation.

[0052] Also, please refer to Figure 1 , the main function of the second clip 32 is to transfer torque to the magnetic block 22, therefore, the second clip 32 only needs to be provided with one clip body 311 in the radial direction of the rotor support frame 1 to transfer the torque. At the same time, since the first clip 31 and the second clip 32 are both protrudingly provided on the circumferential side of the rotor support frame 1 along the radial direction of the rotor support frame 1, but since the first clip 31 is provided with two clip bodies 311 along its extension direction, and the second clip 32 is provided with one clip body 311 along its extension direction, such high-low matching can reduce magnetic performance loss, thereby ensuring smooth magnetic performance of the plastic magnet surface, improving the NVH performance of the motor rotor structure 100, and further improving the performance of the motor. Figure 2 As shown, more magnetic lines of force can be passed, thereby enhancing the function of the motor. The combination of the first buckle 31 and the second buckle 32 not only enables the magnetic part 2 to be securely mounted on the rotor support frame 1, but also can transmit sufficient motor torque to the magnetic part 2, further improving the efficiency and reliability of the motor.

[0053] In addition, please refer to Figure 1 , the shaft hole 11 is provided with a driving block 111, and the driving block 111 is used to insert into the keyway of the driving shaft to drive and connect the driving shaft. It can be understood that in some embodiments, the connection between the driving shaft and the shaft hole 11 is driven and connected by a key connection. However, this connection method will crush the key or the keyway containing the key when the load is too large. Therefore, in order to avoid the keyway at the position of the shaft hole 11 from being crushed and causing the driving connection to fail, the shaft hole 11 is provided with a driving block 111, and the driving block 111 is used to insert into the keyway of the driving shaft to drive and connect the driving shaft. Such a setting is equivalent to directly setting the key and the rotor support frame 1 in an integrated manner. This setting makes the rotor support frame 1 more outstanding in load capacity and is not easy to be crushed and fail. At the same time, the rotor support frame 1 transmits torque through the driving block 111 and limits the axial movement of the driving shaft, thereby further ensuring the stability of the motor rotor structure 100 and thus ensuring the reliability of the motor.

[0054] For further information, please refer to Figure 1, the driving blocks 111 are provided with two protruding blocks, which are arranged opposite to each other at intervals. It can be understood that during the rotation of the rotor support frame 1, the torque is output to the driving shaft. When the load on the output end of the driving shaft is too large, or when the input end of the driving shaft rotates suddenly and outputs a very large torque, the driving block 111 will be damaged. This is because the driving block 111 is only provided on one end side of the driving shaft, which makes it impossible to evenly distribute the output torque on the circumference of the driving shaft, thereby causing a great burden on the driving block 111. If the load exceeds the range that it can bear, the driving block 111 will be crushed; therefore, the driving blocks 111 protruding from the shaft hole 11 are provided with two, and are arranged opposite to each other at intervals in the shaft hole 11.

[0055] The traditional connection of a single driving block 111 has many problems, such as high energy consumption and high noise. The driving connection mode of two driving blocks 111 has the following advantages:

[0056] 1. High transmission efficiency. Since the drive shaft structure connected by the dual drive blocks 111 is short in length, has good rigidity, and has a small axis deviation, the transmission efficiency can be greatly improved;

[0057] 2. Low noise. Since the rotor support frame 1 connected to the dual drive block 111 has good structural rigidity, the noise generated during the transmission of the motor rotor structure 100 can be greatly reduced;

[0058] 3. Small space occupation: the rotor support frame 1 and the drive shaft connected by the dual drive blocks 111 can be small and compact, making it easier to install in a limited space.

[0059] The present invention also proposes a motor, which includes the motor rotor structure 100. The specific structure of the motor rotor structure 100 refers to the above embodiment. Since the motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0060] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A motor rotor structure, characterized in that: include: A rotor support frame, which is circular in cross section and elongated along the axis thereof, wherein an axial hole is provided at the axis center of the rotor support frame for inserting a driving shaft to drive and connect the rotor support frame; and A magnetic part is installed and fixed along the circumference of the rotor support frame to form a magnetic induction area; Wherein, the rotor support frame is made of non-metallic material.

2. The motor rotor structure according to claim 1, characterized in that: The magnetic part is made of plastic magnetic material; and / or, The rotor support frame is made of polyphenylene sulfide.

3. The motor rotor structure according to claim 2, characterized in that: The magnetic part is manufactured by adopting a pre-magnetization molding process.

4. The motor rotor structure according to claim 2, characterized in that: The outward end surface of the magnetic part is concavely provided with a flat cutout for magnetization.

5. The motor rotor structure according to claim 1, characterized in that: The motor rotor structure also includes a mounting portion, which is arranged between the rotor support frame and the magnetic portion and is used to fix the magnetic portion.

6. The motor rotor structure according to claim 5, characterized in that: The magnetic portion is evenly divided into a plurality of magnetic blocks along the radial direction of the cross section of the rotor support frame, and the end surface of each magnetic block facing the rotor support frame is concavely provided with a first groove; and The mounting portion includes a plurality of first buckles, which are convexly arranged on the circumference of the rotor support frame and are arranged corresponding to the first grooves; Wherein, the first buckle is provided with two buckle bodies in the radial direction of the rotor support frame, which are used for holding the magnetic block after being inserted into the first groove.

7. The motor rotor structure according to claim 6, characterized in that: The end surface of the magnetic block facing the rotor support frame and the edge where two magnetic blocks meet are provided with a second groove; and, The mounting portion further includes a plurality of second buckles, which are convexly arranged on the peripheral side of the rotor support frame and are arranged corresponding to the second grooves; Wherein, the second buckle is provided with a buckle body in the radial direction of the rotor support frame, which is used for transmitting torque to the magnetic block after being inserted into the second groove.

8. The motor rotor structure according to claim 1, characterized in that: A driving block is protruding from the shaft hole, and the driving block is used to be inserted into the keyway of the driving shaft to drive and connect the driving shaft.

9. The motor rotor structure according to claim 8, characterized in that: The driving blocks are protruded with two and are arranged opposite to each other at an interval.

10. A motor, characterized in that: The motor comprises a motor rotor structure as claimed in any one of claims 1 to 9.

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