Permanent magnet motor rotor structure

Abstract

The utility model is suitable for motor technical field provides a kind of permanent magnet motor rotor structure, including the base of column, the outer surface of base is evenly spaced and is equipped with multiple insertion slots with its length adaptation along its circumferential direction, the inside of multiple insertion slots is detachably installed with permanent magnet.The permanent magnet motor rotor structure, by setting weight-reducing hole and heat dissipation fin, the device is fixed when installing, then the front limit disc and rear limit disc are installed at the both ends of base, the outer side surface of two limit discs is respectively fixedly connected with front heat dissipation fin and rear heat dissipation fin, improve the heat dissipation performance of the device whole, and the weight-reducing hole that is opened on base is all triangle profile, since the structure of triangle is most stable, so it is not necessary to additionally support to reinforce it, so it can guarantee the heat dissipation effect at the same time also can make the overall quality of the structure not too big, to improve the practicability of the structure.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and in particular relates to a rotor structure for a permanent magnet motor. Background Technology

[0002] A permanent magnet synchronous motor is mainly composed of a rotor, end covers, and a stator. The stator structure of a permanent magnet synchronous motor is very similar to that of an ordinary induction motor. The biggest difference between the rotor structure and that of an asynchronous motor is that high-quality permanent magnet poles are placed on the rotor. Depending on the location of the permanent magnets on the rotor, permanent magnet synchronous motors are usually divided into surface rotor structures and built-in rotor structures.

[0003] Chinese Patent Publication No. CN 221081011 U discloses a rotor for a permanent magnet synchronous motor, which includes a permanent magnet and a shaft. The shaft has a bearing frame fitted onto its outer surface. Symmetrical stabilizing components for increasing the strength of the bearing frame are arranged at both ends of the bearing frame. Positioning components are permeated through the surface of each stabilizing component. When the two stabilizing components are attached to both ends of the bearing frame, stabilizing protrusions are inserted into the bearing groove to tighten the permanent magnet and increase its stability. Simultaneously, reinforcing member one and reinforcing member two are inserted into corresponding weight-reducing through holes one and two. This reduces the weight of the bearing frame without affecting its strength, improves the stability of the assembly between the bearing frame and the permanent magnet, and enhances the output performance and efficiency of the motor.

[0004] The aforementioned patent includes a positioning component to fix the permanent magnet and improve its stability. However, in actual manufacturing, the rotor uses special glue to fix the permanent magnet and does not require any other structure to assist it. The positioning component designed therein will only increase the overall weight of the rotor. Utility Model Content

[0005] This utility model provides a permanent magnet motor rotor structure, aiming to solve the problem in the above-mentioned patents that set up positioning components to fix the permanent magnets and improve their stability. However, in actual processing, the rotor uses special glue to fix the permanent magnets, and no other structure is needed to assist. The positioning components designed therein only increase the overall weight of the rotor.

[0006] This utility model is implemented as follows: a permanent magnet motor rotor structure includes a columnar base. The outer surface of the base is provided with a plurality of slots that are evenly spaced along its circumference and adapted to its length. Permanent magnets are detachably installed inside the plurality of slots. A front limiting plate and a rear limiting plate are detachably installed at both ends of the base, respectively. A plurality of front heat dissipation fins and a plurality of rear heat dissipation fins are fixedly connected to the outer surfaces of the front limiting plate and the rear limiting plate, respectively.

[0007] The front surface of the base has multiple weight-reducing holes that run horizontally through it.

[0008] Preferably, the inner contours of the plurality of weight-reducing holes are all triangular.

[0009] Preferably, the outer edge of the front end surface of the base is provided with a plurality of through holes, the front end surface of the rear limiting plate is provided with a plurality of plug rods that correspond to and are adapted to the plurality of through holes, and the front end surface of the front limiting plate is provided with a plurality of mounting holes that correspond to the plurality of plug rods.

[0010] Preferably, the front ends of the plurality of insertion rods are provided with external threads, and the front ends of the plurality of mounting holes are all expanded outward to form a recessed groove.

[0011] Preferably, both ends of the base are laterally fixedly connected to a rotating shaft coaxial with it.

[0012] Preferably, both the front limiting plate and the rear limiting plate have a through hole in the middle of one side surface that is adapted to the rotating shaft.

[0013] Beneficial effects

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a permanent magnet motor rotor structure. By setting weight-reducing holes and heat dissipation fins, the permanent magnet is fixed with glue during installation. Then, a front limit plate and a rear limit plate are installed at both ends of the base. The outer surfaces of the two limit plates are respectively fixedly connected to the front and rear heat dissipation fins, which improves the overall heat dissipation performance of the device. Furthermore, the weight-reducing holes opened on the base are all triangular in shape. Since the triangular structure is the most stable, no additional support is needed for reinforcement. This ensures heat dissipation while preventing the overall weight of the structure from becoming too large, thereby improving the practicality of the structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall external structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the base structure in this utility model.

[0018] In the diagram: 1-base, 2-slot, 3-permanent magnet, 4-rear limit plate, 5-front limit plate, 6-through hole, 7-insertion rod, 8-mounting hole, 9-external thread, 10-rear heat dissipation fin, 11-front heat dissipation fin, 12-weight reduction hole, 13-spindle. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a permanent magnet motor rotor structure, including a columnar base 1, with multiple slots 2 of the same length evenly spaced along its circumference on the outer surface of the base 1, permanent magnets 3 being detachably installed inside the multiple slots 2, and front limiting disks 5 and rear limiting disks 4 being detachably installed at both ends of the base 1, with multiple front heat dissipation fins 11 and multiple rear heat dissipation fins 10 fixedly connected to the outer surfaces of the front limiting disks 5 and rear limiting disks 4 respectively;

[0021] Multiple weight-reducing holes 12 are horizontally opened on the front surface of the base 1.

[0022] The inner contours of the multiple weight-reducing holes 12 are all triangular.

[0023] In this embodiment, during installation, the permanent magnet 3 is fixed with glue. Then, a front limiting plate 5 and a rear limiting plate 4 are installed at both ends of the base 1. The outer surfaces of the two limiting plates are respectively fixedly connected to the front heat dissipation fins 11 and the rear heat dissipation fins 10, which improves the overall heat dissipation performance of the device. Furthermore, the weight reduction holes 12 opened on the base 1 are all triangular in shape. Since the triangular structure is the most stable, no additional support is needed to reinforce it. This ensures the heat dissipation effect while preventing the overall mass of the structure from becoming too large, thereby improving the practicality of the structure.

[0024] Furthermore, the outer edge of the front surface of the base 1 is provided with multiple through holes 6, and the front surface of the rear limiting plate 4 is provided with multiple plug rods 7 that correspond to and are adapted to the multiple through holes 6. The front surface of the front limiting plate 5 is provided with multiple mounting holes 8 that correspond to the multiple plug rods 7.

[0025] The front ends of multiple insertion rods 7 are provided with external threads 9, and the front ends of multiple mounting holes 8 are expanded outward to form grooves.

[0026] In this embodiment, during installation, the multiple insert rods 7 on the rear limiting plate 4 are aligned with the multiple through holes 6 and inserted until the front surface of the rear limiting plate 4 is in contact with the rear end of the base 1. The multiple insert rods 7 will then protrude from the front end of the multiple through holes 6. At this time, the multiple mounting holes 8 of the front limiting plate 5 are aligned with the multiple insert rods 7 and inserted. Then, they are pushed backward until the rear end surface of the front limiting plate 5 is in contact with the front end of the base 1. Then, nuts are installed on the threaded portions at the front ends of the multiple insert rods 7 and tightened into the multiple recesses. This completes the assembly of the device. The multiple insert rods 7 also play a certain role in heat conduction, improving the heat dissipation performance of the structure.

[0027] Furthermore, both ends of the base 1 are horizontally fixedly connected with rotating shafts 13 that are coaxial with it.

[0028] Both the front limit plate 5 and the rear limit plate 4 have through holes in the middle of one side surface that are adapted to the rotating shaft 13.

[0029] In this embodiment, the rotating shaft 13 is the output shaft of the motor, and the shaft hole ensures that the front limit plate 5 and the rear limit plate 4 are not affected during installation.

[0030] The working principle and usage process of this utility model are as follows: After the utility model is installed, the permanent magnet 3 is fixed with glue during installation. Then, the front limiting plate 5 and the rear limiting plate 4 are installed at both ends of the base 1. The outer surfaces of the two limiting plates are respectively fixedly connected with the front heat dissipation fins 11 and the rear heat dissipation fins 10, which improves the overall heat dissipation performance of the device. In addition, the weight reduction holes 12 opened on the base 1 are all triangular in shape. Since the triangular structure is the most stable, no additional support is needed to reinforce it. This ensures the heat dissipation effect while preventing the overall weight of the structure from becoming too large, thereby improving the practicality of the structure.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotor structure for a permanent magnet motor, characterized in that: The base includes a columnar base (1), and the outer surface of the base (1) is provided with a plurality of slots (2) that are evenly spaced along its circumference and adapted to its length. The interior of each of the slots (2) is detachably equipped with a permanent magnet (3). The two ends of the base (1) are respectively detachably equipped with a front limiting plate (5) and a rear limiting plate (4). The outer surfaces of the front limiting plate (5) and the rear limiting plate (4) are respectively fixedly connected with a plurality of front heat dissipation fins (11) and a plurality of rear heat dissipation fins (10). The base (1) has multiple weight-reducing holes (12) that are opened horizontally through the front surface.

2. The permanent magnet motor rotor structure as described in claim 1, characterized in that: The inner contours of the multiple weight-reducing holes (12) are all triangular.

3. The permanent magnet motor rotor structure as described in claim 1, characterized in that: The base (1) has multiple through holes (6) extending laterally through the outer edge of its front end surface. The rear limiting plate (4) has multiple insert rods (7) that correspond to and are adapted to the multiple through holes (6) extending laterally through the front end surface. The front limiting plate (5) has multiple mounting holes (8) that correspond to the multiple insert rods (7) extending laterally through the front end surface.

4. The permanent magnet motor rotor structure as described in claim 3, characterized in that: The front ends of the plurality of insertion rods (7) are provided with external threads (9), and the front ends of the plurality of mounting holes (8) are expanded outward to form a recessed groove.

5. The permanent magnet motor rotor structure as described in claim 1, characterized in that: Both ends of the base (1) are horizontally fixedly connected to rotating shafts (13) that are coaxial with it.

6. The permanent magnet motor rotor structure as described in claim 5, characterized in that: Both the front limiting plate (5) and the rear limiting plate (4) have through holes in the middle of one side surface that are adapted to the rotating shaft (13).

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