Rotor core and rotor

Abstract

The utility model discloses a rotor iron core and a rotor, and the rotor iron core comprises a plurality of electromagnetic steel plates which are stacked. The electromagnetic steel plate comprises a plurality of magnet through holes formed in a central symmetry mode, the magnet through holes are suitable for magnets to be inserted, and the magnet through holes comprise first-class magnet through holes and second-class magnet through holes; the electromagnetic steel plate is provided with a protruding part extending towards the first-class magnet through hole, and the protruding part is suitable for deforming and abutting against the magnet. The number of the first-class magnet through holes is smaller than or equal to that of the second-class magnet through holes, and in adjacent electromagnetic steel plates, the first-class magnet through holes of the first electromagnetic steel plate are communicated with the second-class magnet through holes of the second electromagnetic steel plate; the rotation angle of the electromagnetic steel plate enables the first-class magnet through holes to correspond to the second-class magnet through holes, stable deformation of the protruding parts is guaranteed, the magnets can be fixed only by producing the electromagnetic steel plate of one specification, and the production cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor core and rotor. Background Technology

[0002] An electric motor typically has a rotor and a stator. The rotor includes a rotor core, magnets mounted on the rotor core, and a shaft. The magnets are usually fixed to the rotor core by interference fit or adhesive, which often presents assembly difficulties.

[0003] To address the aforementioned issues, related technologies propose using multi-layered electromagnetic steel plates to form the rotor core, and incorporating elastic protrusions in some of the electromagnetic steel plates to deform when the magnets are inserted into the rotor core. This ensures convenient magnet assembly while the protrusions lock and limit the magnets after assembly.

[0004] The above solutions not only require electromagnetic steel plates with protrusions, but also electromagnetic steel plates without protrusions to avoid deformation of the protrusions, resulting in high production costs. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a rotor core and a rotor that can achieve avoidance by rotating an electromagnetic steel plate, so that the first type of magnet through hole of the preceding electromagnetic steel plate is connected to the second type of magnet through hole of the subsequent electromagnetic steel plate. Only one type of electromagnetic steel plate needs to be produced to complete the assembly of the rotor.

[0006] On one hand, this utility model embodiment provides a rotor core and a rotor, comprising:

[0007] Multiple electromagnetic steel plates, wherein the multiple electromagnetic steel plates are stacked together;

[0008] The electromagnetic steel plate includes a plurality of magnetic through holes arranged symmetrically in the center. The magnetic through holes are suitable for the insertion of magnets. The magnetic through holes include a type I magnetic through hole and a type II magnetic through hole.

[0009] The electromagnetic steel plate is provided with a protrusion extending into the through hole of the magnet, the protrusion being adapted to deform and abut against the magnet;

[0010] The number of the first type of magnet through holes is less than or equal to the number of the second type of magnet through holes. In adjacent electromagnetic steel plates, the first type of magnet through holes in the earlier electromagnetic steel plate are connected to the second type of magnet through holes in the later electromagnetic steel plate.

[0011] According to some embodiments of the present invention, the electromagnetic steel plate is provided with a first clearance groove communicating with the through hole of the first type of magnet, and the groove wall of the first clearance groove extends the protrusion towards the through hole side of the first type of magnet.

[0012] According to some embodiments of the present invention, the electromagnetic steel plate is provided with a second clearance groove that communicates with the through hole of the second type of magnet. The second clearance groove can correspond to the first clearance groove of the adjacent electromagnetic steel plate and is suitable for accommodating the deformed protrusion.

[0013] According to some embodiments of the present invention, the electromagnetic steel plate is provided with an even number of magnet through holes, and the number of the first type of magnet through holes and the second type of magnet through holes are the same and arranged sequentially.

[0014] According to some embodiments of the present invention, the electromagnetic steel plate is provided with a shaft through hole for mounting a rotating shaft, and the shaft through hole is coaxial with the symmetry center of the plurality of magnet through holes;

[0015] The electromagnetic steel plate is provided with a number of heat dissipation grooves that communicate with the through holes of the rotating shaft. Among the stacked electromagnetic steel plates, the first electromagnetic steel plate, the middle electromagnetic steel plate with heat dissipation grooves, the last electromagnetic steel plate and the rotating shaft enclose a heat dissipation space.

[0016] According to some embodiments of the present invention, a plurality of heat dissipation grooves are symmetrically arranged around the center of the rotating shaft through hole.

[0017] According to some embodiments of the present invention, the center line of the heat dissipation groove coincides with the center line of the symmetry of the two adjacent magnetic through holes.

[0018] According to some embodiments of the present invention, the electromagnetic steel plate is provided with a magnet clearance groove that connects to the magnet through hole. Every two magnet clearance grooves correspond to one magnet through hole and are respectively located on both sides of the axis of symmetry of the magnet through hole.

[0019] On the other hand, this utility model embodiment also provides a rotor, including the rotor core as described above.

[0020] According to some embodiments of the present invention, the rotor core includes a first rotor core and a second rotor core;

[0021] The rotor includes a magnet, with the first rotor core mounted on the first end of the magnet and the second rotor core mounted on the second end, and the first rotor core abutting against the second rotor core.

[0022] The deformation tilt direction of the protrusion of the first rotor core is from the first end to the second end; the deformation tilt direction of the protrusion of the second rotor core is from the second end to the first end.

[0023] The present invention has at least the following beneficial effects: by setting a type I magnet through hole and a type II magnet through hole, and combining the rotation angle of the electromagnetic steel plate to achieve the correspondence between the type I magnet through hole and the type II magnet through hole, the deformation stability of the protrusion is guaranteed. Only one specification of electromagnetic steel plate needs to be produced to fix the magnet, effectively reducing the production cost. Furthermore, the deformation of the protrusion is used to stop the magnet, which not only facilitates the insertion and installation of the magnet, but also effectively prevents the magnet from retracting, thus improving the magnet installation efficiency.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the rotor core structure according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the rotor structure according to an embodiment of the present utility model;

[0028] Figure 3 This is an exploded view of the rotor according to an embodiment of the present invention;

[0029] Figure 4 This is a cross-sectional view of the rotor according to an embodiment of the present invention;

[0030] Figure 5 for Figure 4 A magnified view of part A in the middle.

[0031] Figure label:

[0032] 10. Rotor core; 11. First rotor core; 12. Second rotor core;

[0033] 100. Electromagnetic steel plate; 110. Magnet through hole; 111. Type I magnet through hole; 112. Type II magnet through hole; 120. Protrusion; 130. First clearance groove; 140. Second clearance groove; 150. Shaft through hole; 160. Heat dissipation groove; 170. Magnet clearance groove;

[0034] 910. Magnet; 920. Shaft. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first," "second," etc., are used in the description, they are only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0038] In the description of this utility model, unless otherwise explicitly defined, the terms "setting", "installation", "connection", etc. should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in combination with the specific content of the technical solution.

[0039] Please refer to Figure 1 On one hand, this utility model embodiment provides a rotor core 10, including a plurality of electromagnetic steel plates 100, which are stacked together; each electromagnetic steel plate 100 includes a plurality of centrally symmetrically arranged magnet through holes 110, which are adapted to the insertion of magnets 910, and the magnet through holes 110 include first-type magnet through holes 111 and second-type magnet through holes 112; each electromagnetic steel plate 100 is provided with a protrusion 120 extending into the first-type magnet through hole 111, which is adapted to deform and abut against the magnet 910; the number of first-type magnet through holes 111 is less than or equal to the number of second-type magnet through holes 112, and in adjacent electromagnetic steel plates 100, the first-type magnet through holes 111 of the earlier electromagnetic steel plate 100 are connected to the second-type magnet through holes 112 of the later electromagnetic steel plate 100.

[0040] According to the rotor core 10 of this utility model embodiment, when the electromagnetic steel plates 100 are stacked, the rotation angles of adjacent electromagnetic steel plates 100 are different, so that the first type of magnet through hole 111 of the first electromagnetic steel plate 100 is connected to the second type of magnet through hole 112 of the subsequent electromagnetic steel plate 100. When the magnet 910 is inserted into the magnet through hole 110, the protrusion 120 on one side of the first type of magnet through hole 111 is pushed by the magnet 910 and produces an inclined deformation along the insertion direction of the magnet 910. The deformed protrusion 120 acts as a stop for the retraction of the magnet 910, preventing the magnet 910 from leaving the magnet through hole 110.

[0041] It should be noted that the related technology proposes to use multi-layered electromagnetic steel plates 100 to form the rotor core 10, and to provide elastic protrusions 120 in some of the electromagnetic steel plates 100 so that the magnet 910 deforms when it is inserted into the rotor core 10. This ensures that the magnet 910 is easy to assemble, and that the protrusions 120 lock and limit the magnet 910 after assembly. The above solution not only requires electromagnetic steel plates 100 with protrusions 120, but also electromagnetic steel plates 100 without protrusions 120 to avoid deformation of the protrusions 120, which results in high production costs.

[0042] According to the rotor core 10 of this utility model embodiment, by setting a first type of magnet through hole 111 and a second type of magnet through hole 112, and combining the rotation angle of the electromagnetic steel plate 100, the first type of magnet through hole 111 and the second type of magnet through hole 112 correspond to each other, ensuring the deformation stability of the protrusion 120. Only one specification of electromagnetic steel plate 100 needs to be produced to fix the magnet 910, effectively reducing the production cost. Furthermore, the deformation of the protrusion 120 is used to stop the magnet 910, which not only facilitates the insertion and installation of the magnet 910, but also effectively prevents the magnet 910 from retracting, improving the installation efficiency of the magnet 910.

[0043] It is understandable that when the electromagnetic steel plates 100 are stacked, it is only necessary to ensure that the first type of magnet through hole 111 of the first electromagnetic steel plate 100 and the second type of magnet through hole 112 of the second electromagnetic steel plate 100 correspond to each other to ensure that the deformation of the different protrusions 120 will not interfere with each other.

[0044] In this embodiment, three Class I magnet through holes 111 and three Class II magnet through holes 112 are provided, and the Class I magnet through holes 111 and Class II magnet through holes 112 are symmetrically distributed around the center of the electromagnet plate 100 and spaced apart. Furthermore, by rotating adjacent electromagnet plates 100 by 60 degrees (e.g., ... Figure 1 The first and second electromagnetic steel plates 100 on the left side of the paper are 60 degrees apart, which can satisfy the correspondence of the Class I magnet through hole 111 and the Class II magnet through hole 112.

[0045] In other embodiments, the number of type I magnet through holes 111 and type II magnet through holes 112 can be changed. For example, one type I magnet through hole 111 and two type II magnet through holes 112 can be provided. In this case, the rear electromagnet plate 100 can be rotated 120 degrees or 240 degrees so that the type I magnet through hole 111 of the front electromagnet plate 100 corresponds to any one of the type II electromagnet through holes of the rear electromagnet plate 100. Of course, the specific number can be adjusted based on actual usage requirements.

[0046] In some embodiments, combined with Figure 1 As shown, the electromagnetic steel plate 100 is provided with a first clearance groove 130 that communicates with a through hole 111 of a type of magnet, and the groove wall of the first clearance groove 130 extends a protrusion 120 toward the through hole 111 of a type of magnet.

[0047] In this embodiment, the first clearance groove 130 is provided to extend the length of the protrusion 120, increase the lever arm of the magnet 910 when it is inserted to push against the protrusion 120, and facilitate the deformation of the protrusion 120 and the insertion of the magnet 910.

[0048] In this embodiment, the first clearance groove 130 is located on the side of the through hole 111 of a type of magnet close to the center of the electromagnet plate 100, which makes it easier to set a larger first clearance groove 130 to extend the length of the protrusion 120; of course, it can also be located on any side of the through hole 111 of a type of magnet based on actual needs.

[0049] In some embodiments, combined with Figure 1 As shown, the electromagnetic steel plate 100 is provided with a second clearance groove 140 communicating with the through hole 112 of the second type of magnet. The second clearance groove 140 can correspond to the first clearance groove 130 of the adjacent electromagnetic steel plate 100 and is suitable for accommodating the deformable protrusion 120. By accommodating the deformable protrusion 120 through the second clearance groove 140, the situation where the protrusion 120 does not abut against the electromagnetic steel plate 100 and thus the deformation of the protrusion 120 is insufficient is avoided.

[0050] In some embodiments, combined with Figure 1 As shown, the electromagnetic steel plate 100 is provided with an even number of magnet through holes 110. The number of first-class magnet through holes 111 and second-class magnet through holes 112 are the same and arranged sequentially. This makes the weight distribution of the electromagnetic steel plate 100 uniform and improves the stability of the rotor core 10 during rotation.

[0051] In this embodiment, six magnet through holes 110 are provided, including three Class I magnet through holes 111 and three Class II magnet through holes 112; in other embodiments, as mentioned above, the number of Class I magnet through holes 111 and Class II magnet through holes 112 can be adaptively adjusted, which will not be repeated here.

[0052] In some embodiments, combined with Figure 1 and Figure 2As shown, the electromagnetic steel plate 100 is provided with a shaft through hole 150 for mounting the shaft 920. The shaft through hole 150 is coaxial with the symmetrical center of a plurality of magnet through holes 110. The electromagnetic steel plate 100 is provided with a plurality of heat dissipation grooves 160 communicating with the shaft through holes 150. In the stacked electromagnetic steel plates 100, the heat dissipation grooves 160 of the first electromagnetic steel plate 100, the rear electromagnetic steel plate 100 and the shaft 920 enclose a heat dissipation space.

[0053] In this embodiment, the heat dissipation space increases the heat dissipation area between the rotating shaft 920 and the rotor core 10 (similar to the principle of "heat dissipation fins"). Even without external convection, heat can still be accelerated from the rotating shaft 920 to the electromagnetic steel sheet through intermetallic thermal conduction.

[0054] In some embodiments, combined with Figure 1 As shown, multiple heat dissipation slots 160 are symmetrically arranged around the central through hole 150 of the rotating shaft. In this embodiment, three heat dissipation slots 160 are symmetrically arranged, which facilitates the dynamic balance of the rotor and helps to improve the stability of the rotor core 10 during rotation.

[0055] In some embodiments, combined with Figure 1 As shown by the dashed line, the center line of symmetry of the heat dissipation groove 160 coincides with the center line of symmetry of the two adjacent magnet through holes 110. This allows the heat from the heat dissipation groove 160 to be mainly dissipated through the surface of the electromagnetic steel sheet in the middle part of the two magnet through holes 110, reducing the heat received by the magnet 910 in the magnet through holes 110 and improving the service life of the rotor.

[0056] In some embodiments, combined with Figure 2 As shown, the electromagnetic steel plate 100 is provided with magnet clearance grooves 170 that connect to the magnet through holes 110. Every two magnet clearance grooves 170 correspond to one magnet through hole 110 and are located on both sides of the axis of symmetry of the magnet through hole 110. The magnet clearance grooves 170 facilitate the placement of magnets 910 and can also be used to fill adhesive material for fixing magnets 910 and rotor core 10, thereby improving the fixing effect of magnets 910.

[0057] On the other hand, this utility model embodiment also provides a rotor, including the rotor core 10 as described in the above embodiment.

[0058] In some embodiments, combined with Figures 3 to 5 As shown, the rotor core 10 includes a first rotor core 11 and a second rotor core 12; the rotor includes a magnet 910, with the first rotor core 11 mounted at the first end of the magnet 910 and the second rotor core 12 mounted at the second end, and the first rotor core 11 and the second rotor core 12 abut against each other; the deformation tilt direction of the protrusion 120 of the first rotor core 11 is from the first end to the second end; the deformation tilt direction of the protrusion 120 of the second rotor core 12 is from the second end to the first end.

[0059] In this embodiment, the first rotor core 11 is located at the first end of the magnet 910 ( Figure 4 or Figure 5 (Left side of dotted line) Sleeve, the second rotor core 12 is connected from the second end of magnet 910 ( Figure 4 or Figure 5 (Right side of the dotted line) Overlap, at this time as Figure 5 As shown, the protrusion 120 of the first rotor core 11 tilts to the left to stop the magnet 910 from being pulled out from the right, and the protrusion 120 of the second rotor core 12 tilts to the right to stop the magnet 910 from being pulled out from the left. By inserting the first rotor core 11 and the second rotor core 12 at both ends, not only is the rapid assembly of the rotor core 10 and the magnet 910 achieved, but a self-locking effect is also effectively achieved, preventing the magnet 910 from coming out of the rotor core 10.

[0060] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rotor core, characterized in that, include: Multiple electromagnetic steel plates (100) are stacked together; The electromagnetic steel plate (100) includes a plurality of magnet through holes (110) arranged symmetrically at the center. The magnet through holes (110) are suitable for the insertion of magnets (910). The magnet through holes (110) include a type I magnet through hole (111) and a type II magnet through hole (112). The electromagnetic steel plate (100) is provided with a protrusion (120) extending toward the through hole (111) of the magnet, the protrusion (120) being adapted to deform and abut against the magnet (910). The number of the first type of magnet through holes (111) is less than or equal to the number of the second type of magnet through holes (112). In the adjacent electromagnetic steel plates (100), the first type of magnet through holes (111) of the earlier electromagnetic steel plate (100) is connected to the second type of magnet through holes (112) of the later electromagnetic steel plate (100).

2. The rotor core according to claim 1, characterized in that, The electromagnetic steel plate (100) is provided with a first clearance groove (130) communicating with the through hole (111) of the first type of magnet, and the groove wall of the first clearance groove (130) extends the protrusion (120) towards the through hole (111) of the first type of magnet.

3. The rotor core according to claim 2, characterized in that, The electromagnetic steel plate (100) is provided with a second clearance groove (140) that communicates with the through hole (112) of the second type of magnet. The second clearance groove (140) can correspond to the first clearance groove (130) of the adjacent electromagnetic steel plate (100) and is suitable for accommodating the deformed protrusion (120).

4. The rotor core according to claim 1, characterized in that, The electromagnetic steel plate (100) is provided with an even number of magnet through holes (110), and the number of the first type of magnet through holes (111) and the second type of magnet through holes (112) are the same and arranged sequentially.

5. The rotor core according to any one of claims 1 to 4, characterized in that, The electromagnetic steel plate (100) is provided with a shaft through hole (150) for mounting a shaft (920), and the shaft through hole (150) is coaxial with the symmetry center of the plurality of magnet through holes (110); The electromagnetic steel plate (100) is provided with a plurality of heat dissipation grooves (160) communicating with the through holes (150) of the rotating shaft. In the stacked electromagnetic steel plates (100), the heat dissipation grooves (160) of the first electromagnetic steel plate (100), the electromagnetic steel plate (100) in the middle, the electromagnetic steel plate (100) at the rear, and the rotating shaft (920) enclose a heat dissipation space.

6. The rotor core according to claim 5, characterized in that, The plurality of heat dissipation slots (160) are symmetrically arranged around the central through hole (150) of the rotating shaft.

7. The rotor core according to claim 6, characterized in that, The center line of symmetry of the heat sink (160) coincides with the center line of symmetry of the two adjacent magnet through holes (110).

8. The rotor core according to any one of claims 1 to 4, characterized in that, The electromagnetic steel plate (100) is provided with a magnet clearance groove (170) that connects to the magnet through hole (110). Every two magnet clearance grooves (170) are provided for one magnet through hole (110) and are respectively located on both sides of the axis of symmetry of the magnet through hole (110).

9. A rotor, characterized in that, Includes the rotor core (10) as described in any one of claims 1 to 8.

10. The rotor according to claim 9, characterized in that, The rotor core (10) includes a first rotor core (11) and a second rotor core (12). The rotor includes a magnet (910), with the first rotor core (11) mounted on the first end of the magnet (910) and the second rotor core (12) mounted on the second end, and the first rotor core (11) and the second rotor core (12) abutting against each other; The deformation tilt direction of the protrusion (120) of the first rotor core (11) is from the first end to the second end; the deformation tilt direction of the protrusion (120) of the second rotor core (12) is from the second end to the first end.

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