A motor rotor structure

Abstract

The utility model discloses a motor rotor structure belongs to motor rotor technical field, including rotor shaft, the rotor shaft is installed with front end cover, rotor core group and rear end cover in proper order, be equipped with boss on the rotor shaft and be located front end cover side away from rotor core group, be equipped with a plurality of installation slot on the rotor shaft and be located boss one side, the rotor core group includes a plurality of rotor core piece, a plurality of the rotor core piece all are fixedly connected with boss no.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor technology, specifically to a motor rotor structure. Background Technology

[0002] Permanent magnet synchronous motors are being used in a wider range of applications. With the development of electric vehicles, permanent magnet synchronous motors are being widely used as drive systems due to their advantages such as high efficiency and high power density.

[0003] Automotive motors are increasingly required to have stable performance, low noise, and adaptability to complex operating conditions. Reducing the torque ripple of the motor will significantly improve the vibration and noise of the motor, and also extend the motor's lifespan.

[0004] In existing technologies, magnets are generally mounted on a set of rotor cores, and multiple sets of cores are combined into a complete rotor core assembly. When installing the rotor core assembly, the deflection angle of each set of rotor cores is adjusted by a loader to achieve sequential tilting of the magnetic poles, thereby reducing torque pulsation generated during motor operation and improving motor noise and vibration. However, the above method involves high loader costs and large equipment investment. Therefore, a motor rotor structure is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a motor rotor structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a motor rotor structure, including a rotor shaft, on which a front end cover, a rotor core assembly, and a rear end cover are sequentially mounted; a boss is provided on the rotor shaft on the side of the front end cover away from the rotor core assembly; and multiple mounting slots are provided on the rotor shaft on the side of the boss.

[0007] The rotor core assembly includes multiple rotor core chips, and each of the multiple rotor core chips has a protrusion fixedly connected to it.

[0008] The plurality of protrusions and the plurality of mounting grooves cooperate with each other to achieve the sequential tilting of the magnetic poles.

[0009] As a further preferred embodiment of this technical solution: the positions of each mechanism mounted on the rotor shaft are restricted by the boss, while the boss facilitates the mounting of each rotor iron chip onto the rotor shaft.

[0010] As a further preferred embodiment of this technical solution: the rotor iron chip is uniformly provided with a set of bearing grooves, which support the magnets.

[0011] As a further preferred embodiment of this technical solution: a magnet is installed inside the bearing groove assembly, and the magnet is configured to provide a magnetic field.

[0012] As a further preferred embodiment of this technical solution, the number of rotor iron chips is equal to the number of mounting slots.

[0013] As a further preferred embodiment of this technical solution: both the front end cover and the rear end cover are fixedly connected with a second protrusion, which is installed in the mounting groove, and the second protrusion facilitates the installation of each end cover onto the rotor shaft.

[0014] As a further preferred embodiment of this technical solution: a nut is installed on the rotor shaft on the side of the rear end cover away from the rotor core assembly, and the components are fastened to the rotor shaft by the nut.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this utility model, the magnetic poles are tilted sequentially by the cooperation of the first protrusion and the mounting groove, which can effectively weaken the harmonic magnetic field, reduce the vibration and noise of the motor during operation, and improve the smoothness of operation. At the same time, the triangular arrangement of the bearing groove and the installation of the magnet enhance the stability of the magnetic field and improve the electromagnetic torque output efficiency. The front cover and the rear cover are secured by the cooperation of the second protrusion and the mounting groove, combined with the nut, to ensure the stability of the overall structure and reduce the loosening of parts during operation.

[0017] 2. In this utility model, the boss limits the position of each component, ensuring assembly accuracy. The number of multiple rotor iron chips matches the number of mounting slots, which facilitates standardized production and assembly, and improves the overall performance and service life of the motor.

[0018] 3. In this utility model, the angle of the rotor shaft mounting slot and the rotor iron chip are used to achieve angle deflection, so that the rotor magnetic poles can be tilted sequentially without the need for adjustment by a loader. The structure is simple, does not require additional cost, and is easy to assemble.

[0019] 4. The mounting groove in this utility model is easy to process and has low requirements for manufacturing. Furthermore, the included angle of the rotor shaft mounting groove can be designed according to design requirements without increasing additional costs.

[0020] 5. When the rotor core assembly of this utility model includes multiple rotor core chips, multiple mounting slots can be designed on the rotor shaft to improve adaptability. At the same time, the bumps on the rotor core chips are formed by molds, so as not to increase additional costs. Attached Figure Description

[0021] Figure 1 This is a first structural schematic diagram of a motor rotor structure according to the present invention;

[0022] Figure 2 This is a second structural schematic diagram of a motor rotor structure according to the present invention;

[0023] Figure 3This is an exploded structural diagram of a motor rotor structure according to the present invention;

[0024] Figure 4 This is a schematic diagram of the rotor shaft in a motor rotor structure according to the present invention;

[0025] Figure 5 This is a schematic diagram of the rotor iron chip structure in a motor rotor structure according to the present invention;

[0026] Figure 6 This is a schematic diagram of the installation structure of rotor iron chips and magnets in a motor rotor structure according to the present invention.

[0027] In the diagram: 1. Rotor shaft; 11. Boss; 12. Mounting slot; 2. Rotor core assembly; 21. Rotor core chip; 22. Bearing slot assembly; 23. Boss one; 3. Magnet; 4. Front end cover; 5. Rear end cover; 6. Boss two; 7. Nut. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] Example 1

[0030] Please see Figures 1-6 The present invention provides a technical solution: a motor rotor structure, including a rotor shaft 1, a front end cover 4, a rotor core assembly 2 and a rear end cover 5 are sequentially installed on the rotor shaft 1, a boss 11 is provided on the rotor shaft 1 on the side of the front end cover 4 away from the rotor core assembly 2, and a plurality of mounting grooves 12 are provided on the rotor shaft 1 on the side of the boss 11.

[0031] The rotor core assembly 2 includes multiple rotor core chips 21, and each rotor core chip 21 has a protrusion 23 integrally formed therein;

[0032] Among them, multiple protrusions 23 and multiple mounting slots 12 cooperate with each other to achieve the sequential tilting of the magnetic poles.

[0033] In this embodiment, specifically: the mounting slots 12 are designed at a certain angle. Due to the design of the certain angle, different rotor iron chips 21 form an angle deflection, thereby achieving the tilting of the rotor magnetic poles. For example, the tilting angle is 7.5°. The four mounting slots 12 on the rotor shaft 1 have an angle of 92.5° between the first mounting slot 12 and the second mounting slot 12, an angle of 92.5° between the second mounting slot 12 and the third mounting slot 12, and an angle of 92.5° between the third mounting slot 12 and the fourth mounting slot 12. When each rotor iron chip 21 is installed, the protrusion 23 enters the rotor shaft 1 sequentially from the first mounting slot 12, thereby achieving the tilted pole structure with an angle tilt of 7.5°.

[0034] It should be further explained that the angle between the two mounting slots 12 on the adjacent side and the centerline of the rotor shaft 1 is not 90°.

[0035] In this embodiment, specifically, the protrusion 23 facilitates the installation of each rotor iron chip 21 onto the rotor shaft 1.

[0036] In this embodiment, specifically, the boss 11 is used to restrict the position of each mechanism installed on the rotor shaft 1.

[0037] In this embodiment, specifically, the number of rotor iron chips 21 is equal to the number of mounting slots 12.

[0038] Example 2

[0039] An electric motor rotor structure has a rotor iron chip 21 with uniformly distributed bearing slots 22. The bearing slots 22 are composed of three through slots arranged in a triangular pattern, and are used to support magnets 3.

[0040] In this embodiment, specifically: a magnet 3 is installed in the bearing slot group 22. The magnet 3 is used to provide a magnetic field. When the motor is working, the magnetic field generated by the magnet 3 interacts with the magnetic field generated by the stator winding, thereby generating electromagnetic torque and driving the rotor to rotate.

[0041] In this embodiment, specifically: both the front end cover 4 and the rear end cover 5 are integrally formed with a second protrusion 6, which is installed in the mounting groove 12. The second protrusion 6 facilitates the installation of each end cover onto the rotor shaft 1.

[0042] In this embodiment, specifically: a nut 7 is installed on the rotor shaft 1 on the side of the rear end cover 5 away from the rotor core assembly 2. The nut 7 is used to fasten the front end cover 4, the rotor core assembly 2 and the rear end cover 5 installed on the rotor shaft 1.

[0043] Working principle: During assembly, the front end cover 4 is first installed on the rotor shaft 1 and limited by the boss 11 on the rotor shaft 1. The rotor shaft 1 has multiple mounting slots 12 with a certain angle between them. The bearing slots 22 on the rotor iron chip 21 are distributed in a centrally symmetrical manner. The rotor iron chip 21 has a protrusion 23 inside, which can cooperate with the mounting slots 12 on the rotor shaft 1 for positioning. Different rotor iron chips 21 cooperate with different mounting slots 12 on the rotor shaft 1. Since the mounting slots 12 on the rotor shaft 1 are set at a certain angle, different rotor iron chips 21 form an angle deflection, thereby achieving rotor magnetic pole tilting. Finally, the rear end cover 5 is installed and the nut 7 is locked to complete the fixation.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor rotor structure, comprising a rotor shaft (1), wherein a front end cover (4), a rotor core assembly (2), and a rear end cover (5) are sequentially mounted on the rotor shaft (1), characterized in that: A boss (11) is provided on the rotor shaft (1) and on the side of the front end cover (4) away from the rotor core assembly (2). Multiple mounting slots (12) are provided on the rotor shaft (1) and on the side of the boss (11). The rotor core assembly (2) includes multiple rotor core chips (21), and each of the multiple rotor core chips (21) is fixedly connected with a protrusion (23); The plurality of protrusions (23) and the plurality of mounting grooves (12) cooperate with each other to achieve the sequential tilting of the magnetic poles.

2. The motor rotor structure according to claim 1, characterized in that: The rotor iron chip (21) is uniformly provided with a bearing groove group (22).

3. The motor rotor structure according to claim 2, characterized in that: A magnet (3) is installed inside the bearing groove assembly (22).

4. The motor rotor structure according to claim 1, characterized in that: The number of rotor iron chips (21) is equal to the number of mounting slots (12).

5. The motor rotor structure according to claim 1, characterized in that: Both the front cover (4) and the rear cover (5) are fixedly connected with protrusions (6), which are installed in the mounting groove (12).

6. The motor rotor structure according to claim 1, characterized in that: A nut (7) is installed on the rotor shaft (1) on the side away from the rotor core assembly (2) of the rear end cover (5).

Images