Combined permanent magnet motor rotor structure

Abstract

The utility model discloses a combined permanent magnet motor rotor structure, which comprises a rotor core and a plurality of assembly holes arranged on the surface of the rotor core, and magnetic steel is inserted into each assembly hole. Limiting mechanisms for limiting the magnetic steel are arranged at the two ends of the assembly hole, each limiting mechanism comprises two movable grooves formed in the rotor core, springs and limiting check blocks, the springs and the limiting check blocks are arranged in the movable grooves, and the limiting check blocks are movably installed in the movable grooves through the springs. The top end of the limiting stop block pops up to the inner side of the assembly hole and blocks the magnetic steel; according to the utility model, the magnetic steel and the rotor core are designed into a detachable combined structure, and the magnetic steel can be easily mounted and dismounted through the ingeniously designed connecting mechanism, so that the assembling process of the magnetic steel is simplified, the requirement on the processing precision is reduced, the convenience of replacing the magnetic steel is greatly improved, and the production efficiency is improved. And great convenience is provided for later maintenance of the motor rotor structure.

Description

Technical Field

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

[0002] The performance of a permanent magnet motor largely depends on the design and manufacturing quality of its rotor. Among them, the magnets are the core components in the rotor responsible for generating a constant magnetic field, and their performance is directly related to the motor's operating efficiency, stability and service life. For example, the existing patent with publication number CN217036864U discloses "a permanent magnet motor rotor structure, including a lamination body, the lamination body having a shaft hole and a plurality of permanent magnet mounting positions arranged around the outer circumference of the shaft hole".

[0003] In traditional permanent magnet motor rotor structures, magnets are usually fixed to the rotor core by direct embedding, bonding, or press-fitting. Direct embedding and press-fitting methods are complicated to disassemble and replace when magnets fail and are easily damaged. Although bonding is convenient for installation, the aging of the adhesive over long-term use may cause the magnets to loosen, affecting the stability and reliability of the motor. Therefore, this utility model proposes a combined permanent magnet motor rotor structure. Utility Model Content

[0004] The purpose of this invention is to provide a combined permanent magnet motor rotor structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a combined permanent magnet motor rotor structure, comprising...

[0006] The rotor core has multiple mounting holes on its surface, and a magnet is inserted into each mounting hole.

[0007] Both ends of the assembly hole are provided with a limiting mechanism to limit the magnet. The limiting mechanism includes two movable slots opened inside the rotor core, a spring installed in the movable slot, and a limiting block. The limiting block is movably installed in the movable slot by the spring. The top of the limiting block pops out to the inside of the assembly hole and blocks the magnet. A central sliding groove is opened through the two movable slots. A central slider is provided in the central sliding groove. Both ends of the central slider pass through the two movable slots and are fixed to the limiting block. The limiting mechanism also includes a pressing hole opened on the surface of the rotor core, and the pressing hole communicates with the central sliding groove. A pressing block is fixed on one side surface of the central slider, and the top of the pressing block extends into the pressing hole.

[0008] Preferably, the bottom surface of the limiting block is provided with a groove corresponding to the spring, and one end of the spring is inserted into the groove.

[0009] Preferably, the bottom inner wall of the movable groove is provided with a second groove corresponding to the spring, and the other end of the spring is inserted into the second groove.

[0010] Preferably, a pop-out hole is provided through the movable groove and the assembly hole, and the pop-out hole corresponds to the limiting block.

[0011] Preferably, it also includes a sealing structure, wherein a sealing structure is provided at the opening of each of the pressing holes.

[0012] Preferably, the sealing structure includes a sealing gasket covering the surface of the rotor core and sealing the pressing hole, wherein the inner side of the sealing gasket is provided with an integral annular insert that is inserted into the pressing hole.

[0013] Preferably, the outer surface of the annular insert is provided with an integral side locking block, and the inner wall of the pressing hole is provided with an annular locking groove corresponding to the side locking block, and the side locking block is embedded in the annular locking groove.

[0014] Preferably, the cross-section of the side block is a right-angled triangle.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: By designing the magnet and rotor core as a detachable combined structure, and through the cleverly designed connection mechanism, the magnet can be easily installed and disassembled. This not only simplifies the assembly process of the magnet and reduces the requirements for processing accuracy, but also greatly improves the convenience of magnet replacement, providing great convenience for the later maintenance of the motor rotor structure. Attached Figure Description

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

[0017] Figure 2 This utility model Figure 1 A magnified view of a portion of region A in the middle;

[0018] Figure 3 This is a cross-sectional view of the limiting mechanism of this utility model;

[0019] Figure 4 This utility model Figure 3 A magnified view of a portion of region B in the middle;

[0020] In the diagram: 1. Rotor core; 2. Assembly hole; 3. Magnet; 4. Limiting mechanism; 41. Movable groove; 42. Spring; 43. Limiting block; 44. Central slide groove; 45. Central slider; 46. Pressing block; 47. Pressing hole; 471. Annular groove; 5. Sealing structure; 51. Sealing gasket; 52. Annular insert; 53. Side locking block. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] Please see Figures 1 to 3 This is the first embodiment of the present invention, which provides a technical solution: a combined permanent magnet motor rotor structure, including...

[0024] Rotor core 1, multiple mounting holes 2 opened on the surface of rotor core 1, and a magnet 3 is inserted and installed inside each mounting hole 2;

[0025] Both ends of the assembly hole 2 are provided with limiting mechanisms 4 to limit the magnet 3. The limiting mechanism 4 includes two movable slots 41 opened inside the rotor core 1, a spring 42 installed in the movable slots 41, and a limiting block 43. The limiting block 43 is movably installed in the movable slots 41 by the spring 42. The top of the limiting block 43 pops out to the inside of the assembly hole 2 and blocks the magnet 3, so that the two limiting blocks 43 at both ends of the assembly hole 2 can effectively and stably limit the magnet 3, ensuring the installation stability of the magnet 3. A central sliding groove 44 is opened through the two movable slots 41. A central slider 45 is provided in the central sliding groove 44. The two ends of the central slider 45 pass through the two movable slots 41 respectively and are welded to the limiting blocks 43. The fixing and limiting mechanism 4 also includes a pressing hole 47 opened on the surface of the rotor core 1, and the pressing hole 47 communicates with the central slide groove 44. A pressing block 46 is fixed on one side surface of the central slider 45, and the top of the pressing block 46 extends into the pressing hole 47. Later, the operator only needs to press the pressing block 46 in the pressing hole 47 from the outside of the rotor core 1, so that the central slider 45 with two limiting blocks 43 retracts into the movable groove 41, thereby releasing the limiting blocks 43 from blocking the magnet 3. At this time, the magnet 3 can be pushed out from one end of the assembly hole 2, completing the quick installation and removal of the magnet 3. This makes it easy to install and remove the magnet 3, improves the convenience of replacing the magnet 3, and provides convenience for the later maintenance of the motor rotor structure.

[0026] In this embodiment, preferably, the bottom surface of the limiting block 43 is provided with a groove 1 corresponding to the spring 42, one end of the spring 42 is inserted into the groove 1, and the bottom inner wall of the movable groove 41 is provided with a groove 2 corresponding to the spring 42, the other end of the spring 42 is inserted into the groove 2. The two grooves can limit the spring 42 and prevent the spring 42 from deviating.

[0027] In this embodiment, preferably, a pop-out hole is provided through the movable groove 41 and the assembly hole 2, and the pop-out hole corresponds to the limiting block 43, so that the limiting block 43 can be popped out smoothly.

[0028] Example 2

[0029] Please see Figures 1 to 4 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that the pressing hole 47 can be effectively blocked by the sealing structure 5, and the sealing gasket 51 can be easily removed afterward.

[0030] Specifically, it also includes a sealing structure 5, with a sealing structure 5 provided at the opening of each pressing hole 47.

[0031] In this embodiment, preferably, the sealing structure 5 includes a sealing gasket 51 covering the surface of the rotor core 1 and sealing the pressing hole 47. The inner side of the sealing gasket 51 has an integral annular insert 52 inserted into the pressing hole 47, which can effectively seal the opening of the pressing hole 47. When the pressing block 46 is needed to disassemble or assemble the magnet 3, the sealing gasket 51 can be removed to expose the pressing hole 47. The outer surface of the annular insert 52 has an integral side retainer 53. Both are made of rubber and are resistant to compression. When pressed, elastic deformation occurs. The inner wall of the pressing hole 47 is provided with an annular groove 471 corresponding to the side locking block 53. The side locking block 53 is embedded in the annular groove 471, so that the annular insert 52 can be stably inserted into the pressing hole 47, ensuring the installation stability of the sealing gasket 51 and the annular insert 52. When removing the sealing gasket 51 later, simply pull the sealing gasket 51 outward with force, so that the annular insert 52 and the side locking block 53 are squeezed and undergo elastic deformation, and the annular insert 52 can be easily pulled out from the pressing hole 47.

[0032] In this embodiment, preferably, the cross-section of the side block 53 is a right-angled triangle.

[0033] 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 combined permanent magnet motor rotor structure, characterized in that: include Rotor core (1), multiple mounting holes (2) opened on the surface of rotor core (1), and a magnet (3) is inserted and installed inside each mounting hole (2); Both ends of the assembly hole (2) are provided with limiting mechanisms (4) to limit the magnet (3). The limiting mechanism (4) includes two movable slots (41) opened inside the rotor core (1), a spring (42) installed in the movable slots (41), and a limiting block (43). The limiting block (43) is movably installed in the movable slots (41) by the spring (42). The top of the limiting block (43) pops out to the inside of the assembly hole (2) and blocks the magnet (3). A through opening is provided between the two movable slots (41). There is a central slide groove (44), and a central slider (45) is provided in the central slide groove (44). The two ends of the central slider (45) pass through two movable slots (41) and are fixed to the limiting block (43). The limiting mechanism (4) also includes a pressing hole (47) opened on the surface of the rotor core (1), and the pressing hole (47) communicates with the central slide groove (44). A pressing block (46) is fixed on one side surface of the central slider (45), and the top end of the pressing block (46) extends into the pressing hole (47).

2. A combined permanent magnet machine rotor structure according to claim 1, characterized in that: The bottom surface of the limiting block (43) is provided with a groove corresponding to the spring (42), and one end of the spring (42) is inserted into the groove.

3. A combined permanent magnet machine rotor structure according to claim 2, characterized in that: The bottom inner wall of the movable groove (41) is provided with a second groove corresponding to the spring (42), and the other end of the spring (42) is inserted into the second groove.

4. The combined permanent magnet motor rotor structure according to claim 1, characterized in that: A pop-out hole is provided between the movable groove (41) and the assembly hole (2), and the pop-out hole corresponds to the limiting block (43).

5. A combined permanent magnet machine rotor structure according to claim 1, characterized in that: It also includes a sealing structure (5), and a sealing structure (5) is provided at the opening of each of the pressing holes (47).

6. A combined permanent magnet machine rotor structure according to claim 5, characterized in that: The sealing structure (5) includes a sealing pad (51) covering the surface of the rotor core (1) and sealing the pressing hole (47), and the inner side of the sealing pad (51) is provided with an integral annular insert (52) inserted into the pressing hole (47).

7. A combined permanent magnet machine rotor structure according to claim 6, characterized in that: The outer surface of the annular insert (52) is provided with an integral side locking block (53), and the inner wall of the pressing hole (47) is provided with an annular locking groove (471) corresponding to the side locking block (53), and the side locking block (53) is embedded in the annular locking groove (471).

8. The combined permanent magnet motor rotor structure according to claim 7, characterized in that: The side block (53) has a right-angled triangle cross section.

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