Motor surface-mounted rotor close-fitting structure

Abstract

The utility model provides a motor surface-mounted rotor close-fitting structure, which comprises a rotor iron core, a plurality of dovetail grooves for placing surface-mounted magnetic steel are arranged on the peripheral wall of the rotor iron core, the plurality of dovetail grooves are uniformly arranged at intervals in the circumferential direction, a first groove wall and a second groove wall which are oppositely arranged are arranged in each dovetail groove, and the surface-mounted magnetic steel is arranged in the first groove wall and the second groove wall. The first groove wall is provided with a plurality of elastic protrusions, and the elastic protrusions are distributed at intervals in the axial direction and face the second groove wall, so that the surface-mounted magnetic steel is extruded in the dovetail groove. According to the motor surface-mounted rotor close-fitting structure, the mounting process of the surface-mounted magnetic steel is reduced, and the assembling efficiency of the motor rotor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor surface-mounted rotor tight-fitting structure. Background Art

[0002] The traditional surface-mount magnet installation process includes: 1. The surface-mount rotor core and the magnet gap are glued together. Not only is the process relatively complicated, but the reliability is also low, and the magnet is easy to fall off, causing the motor to get stuck; 2. The surface-mount rotor assembly is integrally wrapped with plastic to fix the magnet. Not only is the process complicated, but the cost is relatively high; 3. A steel sleeve is added to the outside of the surface-mount rotor assembly. Not only is the process complicated, but the air gap of the motor is increased, resulting in reduced performance and efficiency, and poor NVH performance of the motor. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the surface-mounted magnetic steel installation process is complicated. In order to overcome the defects of the above prior art, the utility model provides a motor surface-mounted rotor tight-fitting structure.

[0004] The utility model provides a motor surface-mounted rotor tight-fitting structure, including a rotor core, wherein a plurality of dovetail grooves for inserting surface-mounted magnetic steels are arranged on the outer peripheral wall of the rotor core, the plurality of dovetail grooves are evenly spaced around the circumference, two oppositely arranged first groove walls and second groove walls are arranged in the dovetail grooves, the first groove walls are provided with a plurality of elastic protrusions, the plurality of elastic protrusions are distributed at intervals along the axial direction and are arranged toward the second groove wall, so that the surface-mounted magnetic steels are squeezed in the dovetail grooves.

[0005] Compared with the prior art, the surface-mounted rotor tight-fitting structure of a motor disclosed in the present application has the following advantages: by arranging a plurality of elastic protrusions on the first slot wall of the dovetail slot, and the plurality of elastic protrusions are arranged toward the second slot wall, the surface-mounted magnet is squeezed between the first slot wall and the second slot wall, which is conducive to the stable arrangement of the surface-mounted magnet in the dovetail slot, reduces the surface-mounted magnet from escaping from the dovetail slot, improves the connection reliability between the surface-mounted magnet and the rotor core, thereby reducing the installation process of the surface-mounted magnet and improving the assembly efficiency of the motor rotor.

[0006] In a possible implementation manner, a groove for the elastic protrusion to squeeze and avoid is provided on the groove wall.

[0007] Compared with the prior art, the above technical solution enables the elastic protrusion to be squeezed into the groove, reducing the extrusion stress of the elastic protrusion on the surface-mounted magnet, facilitating the surface-mounted magnet to be inserted into the dovetail groove, while avoiding damage to the surface-mounted magnet.

[0008] In a possible implementation manner, a side of the elastic protrusion away from the first groove wall is provided with a rounded corner.

[0009] Compared with the prior art, adopting the above technical solution can reduce stress concentration and avoid damaging the surface-mounted permanent magnet.

[0010] In a possible implementation manner, the rotor core is formed by stacking a plurality of silicon steel sheets along the axial direction.

[0011] Compared with the prior art, adopting the above technical solution is beneficial to the forming of the rotor core.

[0012] In a possible implementation manner, each of the elastic protrusions is integrally connected to a corresponding silicon steel sheet, and the thickness of the elastic protrusion is set to be the same as the thickness of the silicon steel sheet.

[0013] Compared with the prior art, adopting the above technical solution can facilitate the processing of the elastic protrusions.

[0014] In a possible implementation manner, the thickness of the silicon steel sheet is not greater than 0.5 mm.

[0015] Compared with the prior art, adopting the above technical solution can cause the elastic protrusion to undergo elastic deformation and improve the extrusion reliability of the elastic protrusion. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the use state of the present utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the rotor core;

[0018] Description of the Reference Numerals in the Drawings

[0019] 1. Rotor core; 11. Silicon steel sheet; 2. Surface-mounted permanent magnet; 3. Dovetail groove; 31. First groove wall; 32. Second groove wall; 4. Elastic protrusion; 5. Groove. Detailed Embodiments

[0020] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principle of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0021] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0022] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0023] The following further describes the present application in detail with reference to the drawings and specific embodiments.

[0024] See Figure 1 and Figure 2 In the embodiments of the present application, a tightly-fitted structure of a surface-mounted rotor of a motor is disclosed, including a rotor core 1. There are eight dovetail grooves 3 for placing surface-mounted magnets 2 provided on the outer peripheral wall of the rotor core 1. The eight dovetail grooves 3 are circumferentially and evenly spaced. Two relatively arranged first groove walls 31 and second groove walls 32 are provided in the dovetail groove 3. A plurality of elastic protrusions 4 are provided on the first groove wall 31. The plurality of elastic protrusions 4 are axially spaced and arranged towards the second groove wall 32, so that the surface-mounted magnet 2 is squeezed in the dovetail groove 3.

[0025] As can be known from the above, by providing a plurality of elastic protrusions 4 on the first groove wall 31 of the dovetail groove 3 and arranging the plurality of elastic protrusions 4 towards the second groove wall 32, the surface-mounted magnet 2 is squeezed between the first groove wall 31 and the second groove wall 32, which is beneficial to stably arranging the surface-mounted magnet 2 in the dovetail groove 3, reducing the surface-mounted magnet 2 from coming out of the dovetail groove 3, improving the connection reliability between the surface-mounted magnet 2 and the rotor core 1, thereby reducing the installation process of the surface-mounted magnet 2 and improving the assembly efficiency of the motor rotor.

[0026] In this embodiment, a groove 5 for the elastic protrusion 4 to be squeezed and avoided is provided on the groove wall, so that the elastic protrusion 4 can be squeezed into the groove 5, reducing the extrusion stress of the elastic protrusion 4 on the surface-mounted magnet 2, which is beneficial to the surface-mounted magnet 2 being snapped into the dovetail groove 3 and avoiding damage to the surface-mounted magnet 2 at the same time.

[0027] In this embodiment, a rounded corner is provided on the side of the elastic protrusion 4 away from the first groove wall 31, which can reduce stress concentration and avoid damage to the surface-mounted magnet 2.

[0028] In this embodiment, the rotor core 1 is formed by stacking a plurality of silicon steel sheets 11 axially.

[0029] In this embodiment, each of the elastic protrusions 4 is integrally connected to a corresponding silicon steel sheet 11, and the thickness of the elastic protrusion 4 is set to be the same as that of the silicon steel sheet 11, thereby facilitating the processing of the elastic protrusion 4.

[0030] In this embodiment, the thickness of the silicon steel sheet 11 is not greater than 0.5 mm, thereby enabling the elastic protrusion 4 to undergo elastic deformation and improving the extrusion reliability of the elastic protrusion 4.

[0031] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0032] In the description of the present application, the description with reference to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples", etc. means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0033] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tightly-fitted structure for the surface-mounted rotor of an electric machine, characterized in that It includes a rotor core (1), and a plurality of dovetail grooves (3) for receiving surface-mounted magnets (2) are provided on the outer peripheral wall of the rotor core (1). The plurality of dovetail grooves (3) are evenly spaced circumferentially. Two oppositely arranged first groove walls (31) and second groove walls (32) are provided in the dovetail groove (3). A plurality of elastic protrusions (4) are provided on the first groove wall (31). The plurality of elastic protrusions (4) are axially spaced apart and arranged towards the second groove wall (32) so that the surface-mounted magnet (2) is pressed in the dovetail groove (3).

2. The surface-mounted rotor tight-fitting structure of the motor according to claim 1, characterized in that A groove (5) for the elastic protrusion (4) to be squeezed and avoided is provided on the groove wall.

3. The surface-mounted rotor tight-fitting structure of the motor according to claim 1, wherein, A rounded corner is provided on the side of the elastic protrusion (4) away from the first groove wall (31).

4. The surface-mounted rotor tight-fitting structure of the motor according to claim 1, characterized in that, The rotor core (1) is formed by stacking a plurality of silicon steel sheets (11) axially.

5. The surface-mounted rotor tight-fitting structure of the motor according to claim 4, characterized in that, Each elastic protrusion (4) is integrally connected to a corresponding silicon steel sheet (11), and the thickness of the elastic protrusion (4) is set to be the same as the thickness of the silicon steel sheet (11).

6. The surface-mounted rotor tight-fitting structure of the motor according to claim 5, characterized in that, The thickness of the silicon steel sheet (11) is not greater than 0.5 mm.

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