Rotor core structure of permanent magnet motor rotor

Abstract

The utility model discloses a rotor core structure of a permanent magnet motor rotor, comprising a rotor main body, the center position of which is provided with an inner hole; integrated convex sleeves are fixedly arranged at two ends of the rotor main body, and the inner diameter of each convex sleeve is equal to the inner diameter of the inner hole; an annular groove is further formed in the end face of the convex sleeve, an abutting assembly is further arranged outside the convex sleeve and comprises an abutting portion, the abutting portion is rotationally arranged in the annular groove, and one side of the abutting portion is in threaded connection with the inner wall of one side of the annular groove; according to the utility model, the integrated convex sleeve is additionally arranged on the end face of the rotor, the abutting assembly is additionally arranged on the convex sleeve, and proper pressure is applied to the convex sleeve through the abutting assembly, so that the convex sleeve deforms and is tightly attached to the motor shaft; according to the mounting mode, the connection stability between the rotor and the motor shaft is remarkably improved, the stability and high efficiency of motor operation are ensured, and meanwhile, a new convenient path is opened up for subsequent maintenance work.

Description

A rotor core structure for a permanent magnet motor rotor Technical Field

[0001] This utility model belongs to the field of rotor core technology, specifically relating to a rotor core structure for a permanent magnet motor rotor. Background Technology

[0002] As part of the magnetic circuit, the rotor core can effectively conduct the magnetic field generated by the permanent magnet, ensuring that the magnetic field is efficiently transmitted inside the motor, thereby enhancing the electromagnetic performance of the motor. The rotor core provides a stable mounting position for the permanent magnet, ensuring that the permanent magnet remains stable when rotating at high speed and preventing it from falling off or shifting due to centrifugal force.

[0003] Current rotor structures rely primarily on various fixing methods, such as expansion sleeves, key shafts, and couplings, to achieve a stable installation during assembly with the motor shaft. While these traditional fixing methods play a crucial role in ensuring the stability and reliability of the connection between the rotor and the motor shaft, they also reveal some significant shortcomings in practical operation.

[0004] Specifically, these mounting methods often present challenges in disassembly. When subsequent maintenance or replacement of the motor or rotor is required, disassembling these fasteners often consumes significant time and effort, sometimes even necessitating specialized tools and equipment. This undoubtedly increases the complexity and cost of maintenance work, and reduces work efficiency.

[0005] Furthermore, improper handling during disassembly can damage the rotor or motor shaft, further increasing the difficulty and cost of repair. Therefore, how to achieve a more convenient and efficient disassembly method while ensuring a secure connection between the rotor and the motor shaft has become a pressing technical challenge. Summary of the Invention

[0006] The purpose of this utility model is to provide a rotor core structure for a permanent magnet motor rotor, so as to solve the problem of inconvenient operation in the disassembly and assembly of the existing rotor structure with the motor shaft mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a rotor core structure for a permanent magnet motor rotor, comprising a rotor body with an inner hole at its center; integrally formed convex sleeves fixed at both ends of the rotor body, the inner diameter of which is equal to the inner diameter of the inner hole; an annular groove is formed on the end face of the convex sleeve, and a clamping assembly is provided outside the convex sleeve, the clamping assembly comprising: a clamping part screwed into the annular groove, one side of which is threaded to the inner wall of one side of the annular groove, and the other side of which abuts against the inner wall of the other side of the annular groove; by continuously rotating the clamping part toward the inside of the annular groove, the inner wall of the other side of the annular groove will be deformed toward the center of the inner hole, and the slight deformation will achieve clamping with the shaft penetrating the inner hole, thereby achieving a stable installation; a connecting part integrally set at the top of the clamping part, the connecting part being bent to connect with the outer surface of the convex sleeve, the connecting part ensuring that the entire clamping assembly will not fall off during the clamping process, and also facilitating subsequent separation.

[0008] Preferably, the abutting part is an abutting ring, the inner wall of which is threaded with one side of the inner wall of the annular groove, and the two are threadedly connected; the other side of the annular groove is inclined and has a abutting piece formed therein, the other side of the abutting ring abuts against the abutting piece, when the abutting ring rotates toward the inside of the annular groove, it will press against the abutting piece and force the abutting piece to undergo slight deformation, when deformation occurs, the inner hole will shrink within the area of ​​the abutting piece, thereby achieving abutment with the motor shaft, thus ensuring a stable installation, and when disassembly is required later, the entire abutting assembly can be unscrewed and separated.

[0009] Preferably, the connecting part includes a connecting part connected to the outer end face of the abutment ring, and an outer connecting sleeve integrally disposed on the connecting part. The outer connecting sleeve and the connecting part together form an L-shaped structure. The inner wall of the outer connecting sleeve and the outer surface of the protrusion sleeve are also threaded, and the two are threadedly connected to ensure the proper tightness of the abutment ring.

[0010] Preferably, the length of the outer connecting sleeve is greater than the length of the abutment ring, thereby ensuring that the abutment ring can also be rotated normally during the rotation of the outer connecting sleeve, and achieving the abutment ring and the clamping piece abutting together while maintaining the connection; the thickness of the outer connecting sleeve is less than the thickness of the abutment ring.

[0011] Preferably, the inner width of the annular groove gradually decreases from the outside to the inside, and the thickness of the abutment ring is greater than the width at the bottom surface of the annular groove, thereby ensuring that when the abutment ring is screwed into the annular groove, the abutment piece can be forced to deform.

[0012] Preferably, the inner wall of the inner hole is provided with a plurality of heat dissipation holes evenly distributed, and the front surface of the rotor body is provided with ventilation holes. Each ventilation hole is connected to all heat dissipation holes in the same column. In use, the heat inside the inner hole is carried away by the heat dissipation holes, and the temperature is cooled by the lateral ventilation of the ventilation holes.

[0013] Preferably, the diameter of the ventilation hole is larger than the diameter of the heat dissipation hole, and the heat dissipation hole and the ventilation hole are distributed in a circumferential shape.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, an integral convex sleeve is added to the end face of the rotor, and a clamping component is added to the convex sleeve. The clamping component applies appropriate pressure to the convex sleeve, forcing it to deform and tightly fit against the motor shaft. This installation method not only significantly improves the connection stability between the rotor and the motor shaft, ensuring smooth and efficient motor operation, but also opens up a new and convenient path for subsequent maintenance. Furthermore, during disassembly, operators can easily separate the rotor from the motor shaft simply by rotating the clamping component. This design greatly simplifies the disassembly process, reduces reliance on specialized tools, effectively shortens maintenance time, and also reduces potential damage to the equipment caused by improper disassembly. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of this utility model;

[0017] Figure 2 is a front view of this utility model;

[0018] Figure 3 is a cross-sectional view of section AA in Figure 2 of this utility model;

[0019] Figure 4 is an enlarged schematic diagram of region B in Figure 3 of this utility model.

[0020] In the picture:

[0021] 100, Rotor body; 100a, Inner hole; 100b, Heat dissipation hole; 100c, Ventilation hole; 101, Protruding sleeve; 101a, Annular groove; 101b, Clamping plate;

[0022] 200, clamping component; 201, clamping ring; 202, connecting part; 203, outer connecting sleeve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figures 1 to 4. This utility model provides a technical solution: a rotor core structure for a permanent magnet motor rotor, comprising...

[0025] The rotor body 100 has an inner hole 100a at its center.

[0026] The rotor body 100 has integrally formed protruding sleeves 101 fixed at both ends, the inner diameter of which is equal to the inner diameter of the inner hole 100a; an annular groove 101a is also formed on the end face of the protruding sleeve 101, and a clamping assembly is also provided on the outside of the protruding sleeve 101, the clamping assembly including:

[0027] The abutment is screwed into the annular groove 101a. One side of the abutment is threaded to the inner wall of one side of the annular groove 101a, while the other side of the abutment abuts against the inner wall of the other side of the annular groove 101a. By continuously rotating the abutment toward the inside of the annular groove 101a, the inner wall of the other side of the annular groove 101a will be deformed toward the center position of the inner hole 100a. Through slight deformation, it abuts against the shaft that passes through the inner hole 100a, thereby achieving a stable installation.

[0028] The connecting part is integrally set at the top of the clamping part. The connecting part is connected to the outer surface of the protrusion 101 by bending. The connecting part can ensure that the entire clamping assembly 200 will not fall off during the clamping process, and also facilitates subsequent separation.

[0029] In this embodiment, preferably, the abutting part is an abutting ring 201. The inner wall of the abutting ring 201 is threaded with one side of the inner wall of the annular groove 101a, and the two are threadedly connected. The other side of the annular groove 101a is inclined and has a abutting piece 101b. The other side of the abutting ring 201 abuts against the abutting piece 101b. When the abutting ring 201 rotates toward the inside of the annular groove 101a, it will abut against the abutting piece 101b and force the abutting piece 101b to undergo slight deformation. After deformation, the inner hole 100a will shrink within the area of ​​the abutting piece 101b, thereby achieving abutment with the motor shaft, thus ensuring a stable installation. When disassembly is required later, the entire abutting assembly 200 can be unscrewed and separated.

[0030] In this embodiment, preferably, the connecting part includes a connecting part 202 connected to the outer end face of the abutment ring 201, and an outer connecting sleeve 203 integrally disposed on the connecting part 202. The outer connecting sleeve 203 and the connecting part 202 together form an L-shaped structure. The inner wall of the outer connecting sleeve 203 and the outer surface of the protrusion sleeve 101 are also threaded, and the two are threadedly connected to ensure that the abutment ring 201 is properly tightened.

[0031] In this embodiment, preferably, the length of the outer connecting sleeve 203 is greater than the length of the abutment ring 201, thereby ensuring that the abutment ring 201 can also be rotated normally during the rotation of the outer connecting sleeve 203, and that the abutment ring 201 and the clamping piece 101b are clamped together while maintaining the connection; the thickness of the outer connecting sleeve 203 is less than the thickness of the abutment ring 201.

[0032] In this embodiment, preferably, the inner width of the annular groove 101a gradually decreases from the outside to the inside, and the thickness of the abutment ring 201 is greater than the width at the bottom surface inside the annular groove 101a, so as to ensure that when the abutment ring 201 is screwed into the annular groove 101a, the abutment piece 101b can be forced to deform.

[0033] In this embodiment, preferably, a plurality of heat dissipation holes 100b are uniformly opened on the inner wall of the inner hole 100a, and ventilation holes 100c are opened on the front surface of the rotor body 100. Each ventilation hole 100c is connected to all the heat dissipation holes 100b in the same column. In use, the heat inside the inner hole 100a is carried away by the heat dissipation holes 100b, and the temperature is cooled by the lateral ventilation of the ventilation holes 100c.

[0034] In this embodiment, preferably, the diameter of the ventilation hole 100c is larger than the diameter of the heat dissipation hole 100b, and the heat dissipation hole 100b and the ventilation hole 100c are distributed in a circumferential shape.

[0035] Although embodiments of the present invention have been shown and described (see the detailed description above), 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 rotor core structure for a permanent magnet motor rotor, comprising a rotor body (100) with an inner hole (100a) at its center; characterized in that: The rotor body (100) has integrally formed convex sleeves (101) fixed at both ends. The inner diameter of the convex sleeves (101) is equal to the inner diameter of the inner hole (100a). An annular groove (101a) is also formed on the end face of the convex sleeves (101). A clamping assembly is also provided on the outside of the convex sleeves (101). The clamping assembly includes: a clamping part, which is screwed into the annular groove (101a). One side of the clamping part is threaded to one side of the inner wall of the annular groove (101a), and the other side of the clamping part abuts against the other side of the inner wall of the annular groove (101a); and a connecting part, which is integrally formed at the top of the clamping part. The connecting part is connected to the outer surface of the convex sleeves (101) by bending.

2. The rotor core structure of a permanent magnet motor rotor according to claim 1, characterized in that: The abutting part is an abutting ring (201). The inner wall of the abutting ring (201) is threaded with one side of the inner wall of the annular groove (101a), and the two are threadedly connected. The other side of the annular groove (101a) is inclined and has an abutting piece (101b). The other side of the abutting ring (201) abuts against the abutting piece (101b).

3. The rotor core structure of a permanent magnet motor rotor according to claim 2, characterized in that: The connecting part includes a connecting part (202) connected to the outer end face of the abutment ring (201), and an outer connecting sleeve (203) integrally disposed on the connecting part (202). The outer connecting sleeve (203) and the connecting part (202) together form an L-shaped structure. The inner wall of the outer connecting sleeve (203) and the outer surface of the protrusion sleeve (101) are both threaded, and the two are threadedly connected.

4. The rotor core structure of a permanent magnet motor rotor according to claim 3, characterized in that: The length of the outer connecting sleeve (203) is greater than the length of the abutment ring (201); the thickness of the outer connecting sleeve (203) is less than the thickness of the abutment ring (201).

5. The rotor core structure of a permanent magnet motor rotor according to claim 2, characterized in that: The inner width of the annular groove (101a) gradually decreases from the outside to the inside, and the thickness of the abutment ring (201) is greater than the width at the bottom surface of the inner side of the annular groove (101a).

6. The rotor core structure of a permanent magnet motor rotor according to claim 1, characterized in that: The inner wall of the inner hole (100a) is provided with a plurality of heat dissipation holes (100b) evenly distributed, and the front surface of the rotor body (100) is provided with ventilation holes (100c), each of the ventilation holes (100c) being connected to all the heat dissipation holes (100b) in the same column.

7. The rotor core structure of a permanent magnet motor rotor according to claim 6, characterized in that: The diameter of the ventilation hole (100c) is larger than the diameter of the heat dissipation hole (100b), and the heat dissipation hole (100b) and the ventilation hole (100c) are distributed in a circumferential shape.

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