Rotor structure and motor using same

Abstract

The utility model relates to the field of permanent magnet motors, in particular to a rotor structure and a motor applying the rotor structure. On one hand, the utility model provides a rotor structure, which comprises an iron core, a mounting groove is formed in the iron core; a permanent magnet is further included, and the permanent magnet is inserted into the mounting groove; a tensioning piece is arranged in the mounting groove, the tensioning piece abuts against the permanent magnet, and the tensioning piece is used for fixing the permanent magnet through elastic abutting force. On the other hand, the utility model provides a motor adopting the rotor structure, and the motor comprises a stator structure and the rotor structure. As the tensioning piece is used and the permanent magnet is fixed through the elastic abutting force of the tensioning piece, the position of the permanent magnet in the mounting groove is more stable, the overall stability of the rotor is further improved, and the performance of the motor is optimized.

Description

Technical Field

[0001] This application relates to the field of permanent magnet motors, and particularly to a rotor structure and a motor applying this rotor structure. Background Art

[0002] A motor generally includes a rotor and a stator. The structural forms of the stator generally include a series magnetic circuit structure and a parallel magnetic circuit structure. For a series magnetic circuit rotor structure, the connection methods between its permanent magnets and the iron core usually adopt the embedded and surface mounting methods.

[0003] Embedded structure: The permanent magnet is embedded into the slot of the iron core. This structure can provide good mechanical strength and thermal stability, and at the same time helps to reduce the eddy current loss of the magnet. The connection between the permanent magnet and the iron core is usually achieved through interference fit or by using an adhesive.

[0004] Surface mounting structure: The permanent magnet is directly mounted on the outer surface of the rotor iron core. This structure is simple and easy to manufacture, but may require additional mechanical support to ensure the stability of the permanent magnet during high-speed rotation.

[0005] However, there are some defects in both the embedded structure and the surface mounting structure. First, for the embedded structure, if the permanent magnet is connected to the iron core by interference fit, a relatively complex manufacturing process is required. Using an adhesive is relatively simple, but its stability depends on the properties and strength of the adhesive. If the stability of the adhesive is insufficient under some special working conditions, it will cause insufficient performance of the motor or even a malfunction.

[0006] For the surface mounting structure, similarly, the above problems will also exist.

[0007] Therefore, what kind of connection structure between the permanent magnet and the iron core is adopted to make the permanent magnet and the iron core have high stability to meet the performance requirements of the motor is one of the technical problems to be solved currently. Utility Model Content

[0008] In order to make the permanent magnet and the iron core have high stability to meet the performance requirements of the motor, this application provides a rotor structure and a motor applying this rotor structure.

[0009] On the one hand, this application provides a rotor structure, adopting the following technical solution:

[0010] A rotor structure includes an iron core; an installation slot is opened on the iron core;

[0011] It further includes a permanent magnet, and the permanent magnet is inserted into the installation slot; a tensioning member is arranged in the installation slot, the tensioning member abuts against the permanent magnet, and the tensioning member is used to fix the permanent magnet with an elastic tightening force.

[0012] By adopting the above technical solution, since the tensioning member is used and the permanent magnet is fixed by its elastic abutting force, the position of the permanent magnet in the installation groove is more stable, thereby improving the overall stability of the rotor and optimizing the performance of the motor.

[0013] Preferably, the tensioning member is arranged as a U-shaped circlip, one side of the U-shaped circlip abuts against the inner wall of the installation groove, and the other end abuts against the permanent magnet.

[0014] By adopting the above technical solution, the simple structure and good elasticity of the U-shaped circlip enable it to conveniently and effectively fix the permanent magnet, further enhancing the stability of the rotor.

[0015] Preferably, a plurality of installation grooves are provided, and a permanent magnet is arranged in each installation groove;

[0016] The tensioning member is arranged as a U-shaped circlip and includes two arms, and the two arms are respectively inserted into two adjacent installation grooves and abut against the permanent magnet.

[0017] By adopting the above technical solution, the permanent magnets in two adjacent installation grooves are respectively fixed by the two arms of the U-shaped circlip, which not only improves the stability of the permanent magnet, but also makes the overall structure more compact.

[0018] Preferably, inclined portions are provided at both ends of the U-shaped circlip, and the two inclined portions are arranged facing each other.

[0019] By adopting the above technical solution, the arrangement of the inclined portions enables the U-shaped circlip to enter the installation groove more smoothly during installation and provides a better elastic abutting force when fixing the permanent magnet, further improving the stability of the rotor.

[0020] Preferably, the tensioning member is arranged as a C-shaped circlip, and both sides of the C-shaped circlip abut against the permanent magnet and the inner wall of the installation groove respectively.

[0021] By adopting the above technical solution, the C-shaped circlip as the tensioning member also has good elasticity and fixing effect, can effectively improve the stability of the permanent magnet, and is not easy to fall off, with high stability.

[0022] Preferably, the tensioning member is arranged as a C-shaped circlip, and a plurality of installation grooves are provided, and a permanent magnet is arranged in each installation groove;

[0023] The C-shaped circlip is located between two adjacent installation grooves, and the C-shaped circlip is located in one of the installation grooves, and both ends of the C-shaped circlip extend into the other card slot, and the permanent magnets in the two installation grooves are both in contact with the C-shaped circlip.

[0024] By adopting the above technical solution, a single C-type circlip fixes the permanent magnets in two adjacent mounting grooves, simplifying the structure and enhancing the stability.

[0025] Preferably, two groups of limiting protrusions are arranged on the inner wall of the mounting groove, the permanent magnet is arranged between the two groups of limiting protrusions, and the permanent magnet is located at the middle position of the mounting groove.

[0026] By adopting the above technical solution.

[0027] On the other hand, the present application provides a motor adopting the above rotor structure, and adopts the following technical solution:

[0028] A motor includes a stator structure and the rotor structure described above.

[0029] By adopting the above technical solution, a tensioning member is used to fix the permanent magnet, thereby effectively improving the stability of the permanent magnet.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. Since a tensioning member is used to fix the permanent magnet, due to the elastic abutting force of the tensioning member, the position of the permanent magnet in the mounting groove is more stable, thereby improving the stability of the rotor and the performance of the motor;

[0032] 2. Preferably, a U-type circlip or a C-type circlip is used as the tensioning member. These circlips have a simple structure, are easy to install, and have good elasticity, and can effectively fix the permanent magnet, further improving the stability of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the rotor structure in Embodiment 1 of the present application;

[0034] Figure 2 is Figure 2 a partial enlarged schematic diagram of part A in;

[0035] Figure 3 is a schematic structural diagram of the U-type circlip in Embodiment 1 of the present application;

[0036] Figure 4 is a schematic structural diagram of the rotor structure in Embodiment 2 of the present application.

[0037] Reference numerals in the drawings: 1, iron core; 11, mounting groove; 12, limiting protrusion; 2, permanent magnet; 3, tensioning member; 31, U-type circlip; 32, inclined portion; 33, C-type circlip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following further describes the present application in detail with reference to the attached Figures 1-4 drawings.

[0039] Embodiment 1

[0040] An embodiment of the present application provides a rotor structure. Referring to Figure 1 , the rotor structure includes an iron core 1, and an installation groove 11 is formed in the iron core 1. It further includes a permanent magnet 2, and the permanent magnet 2 is inserted into the installation groove 11. A plurality of installation grooves 11 are formed and arranged in a ring shape, and a permanent magnet 2 is arranged in each installation groove 11 to provide sufficient magnetic force. In order to stably fix the permanent magnet 2 in the installation groove 11, a tension member 3 is arranged in the installation groove 11. The tension member 3 abuts against the permanent magnet 2 and fixes the permanent magnet 2 through its elastic abutting force. This setting method not only improves the stability of the permanent magnet 2 in the installation groove 11, but also helps to improve the overall stability of the rotor and the performance of the motor.

[0041] Specifically, in the embodiment of the present application, the tension member 3 is set as a U-shaped circlip 31. There are various installation methods for the U-shaped circlip. One is that one side of the U-shaped circlip 31 abuts against the inner wall of the installation groove 11, and the other end abuts against the permanent magnet 2. The other is that the two arms of the U-shaped circlip 31 are respectively inserted into two adjacent installation grooves 11 and abut against the permanent magnet, so as to realize the simultaneous fixation of a plurality of permanent magnets 2.

[0042] Through the elasticity of the U-shaped circlip 31, the permanent magnet 2 can be effectively fixed in the installation groove 11 to prevent it from moving or falling off during the operation of the motor.

[0043] Referring to Figure 2 , in order to improve the position accuracy of the permanent magnet 2 in the installation groove 11, two groups of limit protrusions 12 can be arranged on the inner wall of the installation groove 11. The permanent magnet 2 is arranged between the two groups of limit protrusions 12 and is located at the middle position of the installation groove 11. This setting method can effectively prevent the permanent magnet 2 from shifting or rotating in the installation groove 11, and further improves the stability of the rotor.

[0044] Referring to Figure 3 , in order to facilitate the installation of the U-shaped circlip 31, inclined portions 32 can be arranged at both ends of the U-shaped circlip 31, and the two inclined portions 32 are arranged facing each other. When the permanent magnet 2 is placed in the installation groove 11 and the U-shaped circlip 31 is installed, the inclined portions 32 can provide a guiding function to facilitate the smooth insertion of the U-shaped circlip 31 into the installation groove 11.

[0045] And after the U-shaped circlip 31 is installed, the two inclined portions 32 can be bent and the two inclined portions 32 are made to abut against each other, so that the U-shaped circlip 31 forms a closed ring shape, thereby providing a limiting and locking function for the U-shaped circlip 31 to prevent the U-shaped circlip 31 from falling off.

[0046] Embodiment 2

[0047] This embodiment provides a rotor structure, which is different from that of Embodiment 1 in that the structural form of the tensioning member 3 is different.

[0048] Referring to Figure 4 , in the embodiment of the present application, the tensioning member 3 is set as a C-shaped circlip 33. Both sides of the C-shaped circlip 33 are respectively in contact with the permanent magnet 2 and the inner wall of the installation groove 11, and the permanent magnet 2 is stably fixed in the installation groove 11 through its elasticity.

[0049] Same as Embodiment 1, a plurality of installation grooves 11 are provided, and a permanent magnet 2 is provided in each installation groove 11. When the C-shaped circlip 33 is used as the tensioning member 3, the C-shaped circlip 33 can be located between two adjacent installation grooves 11. Specifically, the C-shaped circlip 33 is located in one installation groove 11, and its two ends extend into another card slot. In this way, the permanent magnets 2 in the two installation grooves 11 are both in contact with the same C-shaped circlip 33, realizing the stable fixation of a plurality of permanent magnets 2.

[0050] In order to realize the processing and manufacturing of the C-shaped circlip 33 and install the C-shaped circlip 33 on the iron core 1, a spring steel rod can be used. After inserting the spring steel rod into the installation groove 11, the spring steel rod is heated and bent, and the end of the spring steel rod is bent into the installation groove 11.

[0051] Embodiment 3

[0052] The embodiment of the present application provides a motor, which includes a stator structure and the rotor structure disclosed in the above Embodiment 1 or Embodiment 2. Due to the adoption of a rotor structure with high stability, the performance of this motor has also been significantly improved.

[0053] In summary, the present invention fixes the permanent magnet 2 by adopting the tensioning member 3, significantly improving the stability of the rotor and the performance of the motor. At the same time, the present invention also provides various specific implementation manners of the tensioning member 3, such as the U-shaped circlip 31 and the C-shaped circlip 33, etc. These circlips have simple structures, are convenient to install, and have good elasticity, and can effectively fix the permanent magnet 2 and further improve the stability of the rotor.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rotor structure, characterized in that: It comprises an iron core (1); the iron core (1) is provided with a mounting groove (11); It also comprises a permanent magnet (2), the permanent magnet (2) being inserted into the mounting groove (11); a tensioning member (3) being arranged in the mounting groove (11), the tensioning member (3) being in contact with the permanent magnet (2), the tensioning member (3) being used to fix the permanent magnet (2) by elastic pressing force.

2. The rotor structure according to claim 1, characterized in that: The tensioning member (3) is configured as a U-shaped retaining spring (31), one side of the U-shaped retaining spring abuts against the inner wall of the mounting groove (11), and the other end of the U-shaped retaining spring abuts against the permanent magnet (2).

3. The rotor structure according to claim 1, characterized in that: A plurality of the installation grooves (11) are provided, and a permanent magnet (2) is disposed in each installation groove (11); The tensioning member (3) is configured as a U-shaped clip (31) and comprises two support arms, the two support arms being respectively inserted into two adjacent mounting grooves (11) and abutting against the permanent magnet.

4. The rotor structure according to claim 3, characterized in that: Both ends of the U-shaped clamping spring (31) are provided with inclined portions (32), and the two inclined portions (32) are arranged facing each other.

5. The rotor structure according to claim 1, characterized in that: The tensioning member (3) is configured as a C-shaped retaining spring (33), and two sides of the C-shaped retaining spring (33) are respectively in contact with the permanent magnet (2) and the inner wall of the installation groove (11).

6. The rotor structure according to claim 1, characterized in that: The tensioning member (3) is configured as a C-shaped retaining spring (33), a plurality of the mounting grooves (11) are provided, and a permanent magnet (2) is disposed in each mounting groove (11); The C-shaped retaining spring (33) is located between two adjacent mounting grooves (11), and the C-shaped retaining spring (33) is located in one of the mounting grooves (11), and both ends of the C-shaped retaining spring (33) extend into the other retaining groove, and the permanent magnets (2) in the two mounting grooves (11) are in abutment with the C-shaped retaining spring (33).

7. The rotor structure according to claim 1, characterized in that: Two groups of limiting protrusions (12) are arranged on the inner wall of the installation groove (11), the permanent magnet (2) is arranged between the two groups of limiting protrusions (12), and the permanent magnet (2) is located in the middle position of the installation groove (11).

8. A motor, characterized in that: It comprises a stator structure and a rotor structure as described in any one of claims 1 to 7.

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