Rotor magnet fixing structure

Abstract

The invention provides a rotor magnet fixing structure which comprises a magnetic base body, a plurality of magnets and two end face silicon steel sheets. The magnetic substrate is formed by overlapping a plurality of silicon steel sheets, and a bonding area is formed on the outer periphery of the magnetic substrate; the inner side edges of the magnets are arranged in the combination area in a matched mode, and grooves are formed in the upper end faces and the lower end faces of at least part of the magnets in a concave mode respectively; the two end face silicon steel sheets are arranged on the upper end face and the lower end face of the magnetic base body respectively, at least one fixing petal is arranged on each end face silicon steel sheet in an outward protruding mode, the fixing petals cover the upper end faces and the lower end faces of the magnets respectively, and at least part of the fixing petals are respectively provided with a buckle in an axial protruding mode. And the grooves on the upper and lower end faces of the plurality of magnets are correspondingly interfered and buckled. Therefore, the number of elements, the cost and the precision requirement are reduced, the friction force capable of being borne by an interface is improved, the fixing stability is improved, and the risks that any element in the rotor is damaged and the rotor breaks down and loses efficacy are greatly reduced.

Description

Technical Field

[0001] The invention relates to a rotor structure, and in particular to a rotor magnet fixing structure. Background Art

[0002] The rotor structure commonly used in motors currently uses magnets and multiple silicon steel sheets to provide magnetic conductivity and reduce iron loss. Figure 1 As shown, the plurality of silicon steel sheets 91 are matched with the plurality of magnets 92 disposed on the outer periphery.

[0003] At this time, in order to fix the plurality of magnets 92 and the plurality of silicon steel sheets 91 to each other, at least one fixing member 93 (for example, a latch) is used, which is respectively inserted into at least one through hole 910 formed between the plurality of magnets 92 and the plurality of silicon steel sheets 91 to provide relative positioning between the plurality of magnets 92 and the plurality of silicon steel sheets 91. In some variations (not shown), the at least one fixing member 93 can also be directly formed on one of the plurality of magnets 92 or the plurality of silicon steel sheets 91 to cooperate with the at least one through hole 910 on the other. However, in order to make the at least one fixing member 93 cooperate with the outer periphery of the plurality of silicon steel sheets 91 to fix the plurality of magnets 92, the at least one through hole 910 must be formed, which limits the elasticity of the plurality of magnets 92 arranged in cooperation with the outer periphery of the silicon steel sheets 91.

[0004] In addition, because the plurality of silicon steel sheets 91 are actually in the shape of a disc, and are in a multi-layer overlapping form (in a cylindrical shape) to match the plurality of magnets 92, the at least one fixing member 93 is required to limit the silicon steel sheets 91 layer by layer relative to the plurality of magnets 92 when fixing, so as to ensure that each layer of silicon steel sheets 91 is fixed. However, since the plurality of silicon steel sheets 91 are stacked, there is a tolerance between any two layers of silicon steel sheets 91, so that the manufacturing accuracy needs to be improved to smoothly penetrate the at least one fixing member 93 to the at least one through hole 910, otherwise it will be hindered from penetrating or the plurality of silicon steel sheets 91 will not fit tightly after penetration. Furthermore, because the materials of the plurality of silicon steel sheets 91 and the magnets 92 are relatively hard, even if the at least one fixing member 93 is made of a tough material, the friction force it can withstand between the interfaces of the plurality of silicon steel sheets 91 and the magnets 92 is still limited, affecting the fixation.

[0005] On the other hand, even if the at least one fixing member 93 is provided to limit the position of each layer of silicon steel sheets 91, because the plurality of silicon steel sheets 91 are overlapped with each other, the plurality of silicon steel sheets 91 closest to the upper and lower end faces are still easy to be separated from the relative limit at both ends of the at least one fixing member 93. Therefore, the existing method also uses the method of setting an outer layer of upper and lower cover plates (not shown) to fix the plurality of silicon steel sheets 91. However, the cover plate will not only increase the volume of the rotor, but the cover plate itself may also be separated, so that the effect of fixing by the upper and lower cover plates is still limited.

[0006] In summary, the loose fit or the separation of the plurality of silicon steel sheets 91 (or even the cover plate) from the relative limit will not only affect the stability of the rotor operation, but also more easily cause collisions that may cause the plurality of magnets 92 to break or even cause rotor failure or ineffectiveness. As a result, the existing rotor structure not only has limited design flexibility, but also requires high manufacturing precision and is greatly affected by tolerances. It is also difficult to effectively provide stable limit for the overlapped silicon steel sheets 91 relative to the plurality of magnets 92.

[0007] Therefore, how to solve the above-mentioned conventional problems and deficiencies is the direction that the inventor of this case and related manufacturers engaged in this industry are eager to study and improve. Summary of the invention

[0008] Therefore, in order to effectively solve the above problems, an object of the present invention is to provide a rotor magnet fixing structure.

[0009] The present invention provides a rotor magnet fixing structure, characterized by comprising:

[0010] A magnetic substrate is formed by a plurality of silicon steel sheets overlapped with each other along the axial direction, and the outer periphery of the magnetic substrate forms at least one bonding area;

[0011] A plurality of magnets, whose height corresponds to the magnetic base, have an outer flange and an inner edge opposite to the outer flange, wherein the inner edges of the plurality of magnets are respectively arranged in a joint area of ​​the outer peripheral edge of the magnetic base, and at least a portion of the upper end surface and the lower end surface of the plurality of magnets are respectively provided with a groove; and

[0012] The two end silicon steel sheets are respectively arranged on the upper end surface and the lower end surface of the magnetic substrate. At least one fixing flap is protruded outwardly at the periphery of the two end silicon steel sheets corresponding to the plurality of magnets. The at least one fixing flap covers the upper end surface and the lower end surface of the plurality of magnets respectively, and at least a portion of the at least one fixing flap is respectively protruded axially with a buckle, and the buckle corresponds to the grooves that interfere with and hold the upper end surface and the lower end surface of the plurality of magnets.

[0013] The rotor magnet fixing structure, wherein: the buckle is formed into a wedge shape and has an inward fastening wall, and the fastening wall is pressed against an inner side surface of the groove.

[0014] The rotor magnet fixing structure, wherein: the buckle is formed into a semi-cylindrical shape, and a circumferential surface of the buckle corresponds to and is pressed against an inner side surface of the groove.

[0015] The rotor magnet fixing structure, wherein: the outer periphery of the plurality of silicon steel sheets is respectively provided with corresponding even-numbered extension sections, the extension sections of the plurality of silicon steel sheets are overlapped with each other along the axial direction, and an even-numbered guide arm is formed on both sides of the bonding area of ​​the magnetic substrate.

[0016] The rotor magnet fixing structure, wherein: the number of the plurality of magnets recessed in the groove is greater than two, and the number of the at least one fixing petal of the buckle protruding from the two end silicon steel sheets is greater than two.

[0017] The rotor magnet fixing structure, wherein: the plurality of magnets with the grooves are symmetrically arranged in the combining area of ​​the outer periphery of the magnetic base.

[0018] Thus, the rotor magnet fixing structure of the present invention can be matched and fixed by the buckle of the at least one fixing flap and the groove of the plurality of magnets, and the stability of the fixation can be directly improved by the two end silicon steel sheets, without the need for additional fixing parts, which not only reduces the number of components but also reduces the precision requirements for manufacturing, using less volume and material; it also prevents the plurality of silicon steel sheets from detaching from the upper and lower ends of the magnetic base; at the same time, it can also disperse the individual strains of the at least one fixing flap when it is locally subjected to uneven external forces. In addition, the outer periphery of the magnetic base does not need to cooperate with any fixing parts to form perforations, so that the design configuration of the plurality of magnets corresponding to the outer periphery of the magnetic base has greater flexibility. Thus, the present invention reduces the number of components, cost and precision requirements, and further improves the friction that the interface can withstand, improves the stability of the fixation, and greatly reduces the risk of damage to any component in the rotor, as well as rotor failure and failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a conventional rotor structure;

[0020] Figure 2 It is a three-dimensional combined schematic diagram of the rotor magnet fixing structure of the present invention;

[0021] Figure 3 It is a three-dimensional exploded schematic diagram of the rotor magnet fixing structure of the present invention;

[0022] Figure 4 It is a three-dimensional exploded schematic diagram of the rotor magnet fixing structure of the present invention;

[0023] Figure 5 It is a side cross-sectional schematic diagram of the rotor magnet fixing structure of the present invention;

[0024] Figure 6A side cross-sectional schematic diagram of another embodiment of the rotor magnet fixing structure of the present invention;

[0025] Figure 7 A front view of the end face silicon steel sheet of the rotor magnet fixing structure of the present invention;

[0026] Figure 8 A front view of an end silicon steel sheet of another embodiment of the rotor magnet fixing structure of the present invention;

[0027] Fig. 9 This is a front view of the silicon steel sheet of the rotor magnet fixing structure of the present invention.

[0028] Explanation of the reference numerals: magnetic substrate 1; bonding area 10; silicon steel sheet 11; extension section 111; guide arm 12; magnet 2; groove 20; inner side surface 20a; outer flange 21; inner edge 22; end silicon steel sheet 3; fixing flap 31; buckle 311; fastening wall 311a; peripheral surface 311b; axial hole 4; rivet hole 5. DETAILED DESCRIPTION

[0029] The above-mentioned objects and the structural and functional characteristics of the present invention will be described based on the preferred embodiments shown in the accompanying drawings.

[0030] See also Figure 2 , is a three-dimensional combination schematic diagram of the rotor magnet fixing structure of the present invention; Figure 3 It is a three-dimensional exploded schematic diagram of the rotor magnet fixing structure of the present invention; Figure 4 It is a three-dimensional exploded schematic diagram of the rotor magnet fixing structure of the present invention; Figure 5 It is a side cross-sectional schematic diagram of the rotor magnet fixing structure of the present invention; Figure 6 A side cross-sectional schematic diagram of another embodiment of the rotor magnet fixing structure of the present invention; Figure 7 A front view of the end face silicon steel sheet of the rotor magnet fixing structure of the present invention; Figure 8 A front view of an end face silicon steel sheet of another embodiment of the rotor magnet fixing structure of the present invention; and Fig. 9 This is a front view of the silicon steel sheet of the rotor magnet fixing structure of the present invention.

[0031] like Figures 2 to 4 As shown, the present invention provides a rotor magnet fixing structure, comprising: a magnetic substrate 1; a plurality of magnets 2, and two end silicon steel sheets 3. The magnetic substrate 1 can be made of metal (such as silicon steel) to provide magnetic conductivity. The plurality of magnets 2 are arranged on the outer periphery of the magnetic substrate 1, and the plurality of magnets 2 are fixed from the upper end surface and the lower end surface of the magnetic substrate 1 respectively by the two end silicon steel sheets 3.

[0032] like Fig. 9As shown, the magnetic matrix 1 can be composed of a plurality of silicon steel sheets 11 stacked together in the axial direction to serve as the magnetic channel of the rotor. For example, the plurality of silicon steel sheets 11 are in the shape of circular discs of the same specifications, so that the circular planes of each two silicon steel sheets 11 can overlap each other with the same outer periphery, so that the plurality of silicon steel sheets 11 are stacked up in the axial direction to form the magnetic matrix 1. Therefore, the magnetic matrix 1 has a circular plane consistent with the plurality of silicon steel sheets 11, but the axial height is formed by the accumulation of the plurality of silicon steel sheets 11 in a cylindrical superposition. In addition, at least one bonding area 10 is formed on the outer periphery of the magnetic matrix 1.

[0033] like Figure 3 and Figure 4 As shown, the height of the plurality of magnets 2 corresponds to the height of the magnetic substrate 1, and the plurality of magnets 2 corresponds to the bonding area 10, so that the plurality of magnets 2 can be arranged in the bonding area 10 of the magnetic substrate 1 corresponding to the magnetic substrate 1. For example, the cross-section of the plurality of magnets 2 can be approximately crescent-shaped, so that its periphery is surrounded by at least two arc-shaped side edges, with an outer flange 21 facing outward, and an inner edge 22 facing the outer periphery of the magnetic substrate 1 for arrangement. Among them, the outer flange 21 protrudes outward and has a greater arc curvature than the inner edge 22 opposite to the outer flange 21. The arc curvature, area shape and size of each of the inner edges 22 correspond to the bonding area 10 of the magnetic substrate 1 respectively, so as to be arranged therein. In addition, the upper end surface and the lower end surface of the crescent-shaped plurality of magnets 2 are respectively concave with a groove 20.

[0034] In fact, as long as the rotor can be effectively and stably operated, the number of the plurality of magnets 2 and the corresponding number of the plurality of bonding areas 10 are not limited to this by the present invention. In this embodiment, eight of the plurality of magnets 2 can be provided, and each magnet 2 is provided corresponding to a bonding area 10. Moreover, it is preferred that they are distributed and arranged in a symmetrical form on the outer periphery of the magnetic substrate 1. Even in some embodiments, the plurality of magnets 2 can be distributed in parallel and adjacent to the outer periphery of the magnetic substrate 1, that is, there is no gap between the corresponding plurality of bonding areas 10 surrounding the outer periphery, and the matching design has greater flexibility, and the present invention is not limited to this.

[0035] See also Figure 5 and Figure 6 As shown, the two end silicon steel sheets 3 are respectively arranged on the upper end surface and the lower end surface of the magnetic substrate 1. In other words, they correspond to the outermost sides of the plurality of silicon steel sheets 11 stacked on the magnetic substrate 1. For example, the two end silicon steel sheets 3 can be disc-shaped, with a circular plane similar to the plurality of silicon steel sheets 11, so it does not occupy additional volume. However, at least one fixed flap 31 is also protruded outwardly at the periphery of the two end silicon steel sheets 3 corresponding to the plurality of magnets 2. At this time, if Figure 7As shown, since the height of the plurality of magnets 2 just corresponds to the height of the magnetic substrate 1 , the at least one fixing flap 31 protrudes to correspond to and cover at least a portion of the upper end surface and the lower end surface of the magnet 2 .

[0036] The at least one fixing flap 31 does not need to completely cover the magnet 2. Figures 3 to 6 As shown, even if the at least one fixed flap 31 covers a small area (for example, in a rectangular shape), the upper and lower end surfaces of the magnet 2 with a crescent-shaped cross section can still produce the effect of clamping the magnet 2 from top to bottom as long as they are covered by the at least one fixed flap 31 in the axial direction. In addition, at least part of the at least one fixed flap 31 is respectively provided with a buckle 311 protruding in the axial direction, and the buckle 311 respectively interferes with and buckles the groove 20 on the upper and lower end surfaces of the magnet 2. In other words, the concave-convex matching limit is formed with each other.

[0037] Therefore, the circular plane of the two-end silicon steel sheet 3 and the at least one fixed flap 31 convexly arranged thereon make the upper and lower end surfaces of the magnetic base 1 and the magnet 2 at least partially covered by the two-end silicon steel sheets 3. In this way, the plurality of magnets 2 can be limited at the outer periphery of the magnetic base 1 by adding concave-convex matching to prevent the plurality of magnets 2 from unexpectedly detaching from any direction. At the same time, when the plurality of magnets 2 are fixed by the two-end silicon steel sheets 3 through the at least one fixed flap 31, the relative positions of the plurality of magnets 2 are also fixed.

[0038] At this time, the positions of the plurality of magnets 2 are relatively around the outer periphery of the magnetic base 1, so as long as the distance between any two magnets 2 is smaller than the diameter of the magnetic base 1, and a common rotating shaft is pivoted from an axial hole 4, it can be ensured that the plurality of magnets 2 are relatively distributed and fixed to the outer periphery of the magnetic base 1 and will not fall off. Therefore, the present invention covers a smaller area and is directly fixed relative to the plurality of magnets 2, but can effectively provide a limit at the fixed position relative to the two end silicon steel sheets 3, and achieves the effect of relatively fixing the plurality of magnets 2 and the magnetic base 1 at the same time with less volume and material.

[0039] Furthermore, since each of the at least one fixing flap 31 is respectively protruded from the outer periphery of the two end silicon steel sheets 3, they can act relatively independently without affecting each other, and each fixing flap 31 can be subjected to outward tension strain so that its buckle 311 can be matched with the groove 20 of the plurality of magnets 2, which not only eliminates the need for additional fixing parts, but also solves the problem of difficulty in fixing due to the use of harder materials (such as silicon steel), and also uses the tension of this strain to improve the stability of the concave-convex fixation.

[0040] In order to make the at least one fixed petal 31 of the two-end silicon steel sheet 3 match and fix with the grooves 20 on the upper and lower end surfaces of the plurality of magnets 2 by means of the buckle 311 and not detach from the upper and lower ends, the protruding diameter length and width of the at least one fixed petal 31 can be designed with reference to the toughness and rigidity of the materials of the two-end silicon steel sheet 3 and the magnetic matrix 1, and the spacing between the buckles 311 can be adjusted accordingly. In this way, the at least one fixed petal 31 can be used directly to achieve a tough fixing function without the need for additional fixing elements. Therefore, the present invention can not only effectively form tension to fix the plurality of magnets 2 when the concave and convex are matched, but also axially tighten the plurality of silicon steel sheets 11 in the magnetic matrix 1, thereby solving the risk that the plurality of silicon steel sheets 11 may detach from the upper and lower ends of the magnetic matrix 1.

[0041] In this way, the silicon steel sheet 3 at both ends will also have a better design flexibility for adjusting the setting tension, which not only helps the setting operation of installing the silicon steel sheet 3 at both ends, but also makes the buckle 311 of the at least one fixed flap 31 more stable when correspondingly interfering and buckling the groove 20. For example, when the fixation of each fixed flap 31 requires the application of tension, it will not be limited by the fixed position of other fixed flaps 31 that have been concave-convexly matched to the groove 20. Moreover, even if it is subjected to external force during operation in the future, the at least one fixed flap 31 can also be strained individually to disperse the uneven external force locally, thereby reducing the possibility of position disengagement due to poor fixing effect caused by material rigidity. Further improve the stability of the fixation.

[0042] like Figure 5 As shown, the buckle 311 can be formed into a wedge shape and each has a fastening wall 311a inwardly perpendicular to the axial direction of the two end silicon steel sheets 3. The groove 20 has an inner side surface 20a. At this time, through the tension, the inner side surface 20a and the fastening wall 311a are pressed against each other on the contact surface, so that the contact surface can withstand a larger friction force. In particular, because of the wedge-shaped setting, the deeper the interference of the buckle 311, the greater the thickness of the buckle 311, and the corresponding pressing tension (friction force) is also greater.

[0043] For example Figure 6 As shown, the buckle 311 can also be formed to be protruded into a semi-cylindrical shape, so that the circumferential surface 311b of the buckle 311 corresponds to the semi-circular inner side surface 20a of the groove 20 and is pressed against each other. At this time, in addition to providing pressing force by the tension of the at least one fixed flap 31, the diameter and volume of the buckle 311 can also be set to fully fill the volume of the groove 20, so that the buckle 311 can interfere with and hold the groove 20 in a tight fit after being slightly squeezed or deformed (for example, pressed), and at this time, the circumferential surface 311b squeezed in the groove 20 can further be evenly and tightly matched with the inner side surface 20a.

[0044] In some embodiments, the magnetic substrate 1 and the end silicon steel sheet 3 may be provided with the axial hole 4 at the center of the circle, and may also be provided with a plurality of rivet holes 5 along the inner circumference. The two end silicon steel sheets 3 are also provided with the axial hole 4 and the plurality of rivet holes 5, which are respectively overlapped with the plurality of silicon steel sheets 11, and then rivets (not shown) are arranged in the plurality of rivet holes 5 to vertically stack the whole axially and fasten it, completing the assembly of the rotor magnet fixing structure of the present invention, which is compatible with the present invention.

[0045] In addition, please refer to Fig. 9 In some embodiments, the outer periphery of the plurality of silicon steel sheets 11 may be provided with even-numbered extension segments 111 corresponding to each other. Figure 3 , the even-numbered extension sections 111 are in groups of two. As the plurality of silicon steel sheets 11 overlap each other, after the plurality of silicon steel sheets 11 form the magnetic matrix 1, each bonding area 10 is formed with an even number of guide arms (ribs) 12, which are respectively located on both sides of the bonding area 10. In this way, the plurality of magnets 2 disposed at the plurality of bonding areas 10 will be limited by the even-numbered guide arms 12 on both sides of the plurality of bonding areas 10, so that the plurality of magnets 2 can be effectively prevented from circumferentially separating from the plurality of bonding areas 10 when the rotor rotates.

[0046] In addition, the outer periphery of the two end silicon steel sheets 3 can also form the even-numbered extension sections 111 accordingly. However, because the magnetic base 1 has already formed the even-numbered guide arms 12, if only part of the silicon steel sheets 11 or the two end silicon steel sheets 3 do not form the even-numbered extension sections 111, the limiting effect will not be affected. Therefore, the present invention is not limited to this.

[0047] In a further embodiment, the even-numbered guide arms 12 may also be formed in a form with claws (not shown) at the front end to provide the plurality of magnets 2 with further clamping and limiting in the plurality of binding areas 10. Alternatively, the even-numbered guide arms 12 corresponding to the two sides of the plurality of binding areas 10 may also be in the form of narrow openings that are respectively retracted toward the plurality of binding areas 10, so that the left and right angles of the plurality of magnets 2 with crescent-shaped cross-sections are limited by the narrow opening width, and thus are not easy to escape from the plurality of binding areas 10.

[0048] In addition, in the embodiment with the even-numbered guide arms 12 providing the plurality of magnets 2 with circumferential and narrow-mouth-shaped limiting, because the two-side limiting of the even-numbered guide arms 12 has been matched, and the at least one fixed flap 31 of the two-end silicon steel sheets 3 covers the upper end surface and the lower end surface of each magnet 2 respectively, even if any of the magnets 2 is not provided with the groove 20 corresponding to the interference and holding of the buckle 311, the effect of fastening the upper and lower parts and preventing the plurality of magnets 2 from falling off can also be achieved. However, the premise is still that at least the two-end silicon steel sheets 3 need to be fixed between the upper end surface and the lower end surface of the plurality of magnets 2 in a correspondingly matched manner, so at least part of the at least one fixed flap 31 and part of the plurality of magnets 2 still need to be matched in a correspondingly concave-convex manner, and the buckle 311 and the groove 20 are provided for fixing.

[0049] At this time, the number of the plurality of magnets 2 with the recessed groove 20 should be at least greater than two, and the number of the at least one fixed flap 31 with the buckle 311 convexly provided on the two end silicon steel sheets 3 should also be greater than two. For example, more than three. The rest do not need to be provided with concave and convex. In this way, because the even-numbered guide arms 12 with narrow mouths are matched, the rest of the at least one fixed flap 31, even if it does not have the buckle 311, can limit the position of the plurality of magnets 2 in the plurality of combined areas 10 so that they do not fall off as long as they can respectively cover at least part of the upper end surface and the lower end surface of the plurality of magnets 2.

[0050] For example, if Figure 8 As shown, when there are eight of the plurality of magnets 2, with the inwardly contracted even-numbered guide arms 12 and the two end silicon steel sheets 3, the grooves 20 can be recessed in only four of the magnets 2, and as long as four of the eight fixing petals 31 of each end silicon steel sheet 3 have the buckles 311 respectively, the plurality of magnets 2 can be fixed. In order to stably fix and evenly distribute the tightening tension, the plurality of magnets 2 with the recessed grooves 20 can be symmetrically arranged in the bonding area 10 on the outer periphery of the magnetic base 1. That is, as Figure 8 As shown, the silicon steel sheets 3 are evenly distributed along the circumference of the two end surfaces in an interval arrangement.

[0051] Therefore, the rotor magnet fixing structure of the present invention can cooperate with the plurality of silicon steel sheets 11 to complete the two end silicon steel sheets 3 by protruding the at least one fixing flap 31, which not only reduces the number of components, but also takes up less extra volume and uses less materials, which can reduce the manufacturing cost and effectively provide the fixing effect of the plurality of magnets 2 relative to the magnetic base 1. In addition, each fixing flap 31 protrudes from the outer edge of the two end silicon steel sheets 3, and stably provides a fixed tension without affecting each other, and can also disperse the uneven external force locally, thereby improving the stability of the fixation. In addition, the at least one fixing flap 31 must not occupy the space on the outer periphery of the magnetic base 1, so that the plurality of magnets 2 can be arranged more flexibly according to the needs. Furthermore, the at least one fixing flap 31 of the present invention is further adjusted in conjunction with the even-numbered guide arms 12, so that even if some of the concave-convex fits are omitted, stable fixation can also be achieved.

[0052] In summary, the plurality of magnets 2 only need to be concavely provided with the grooves 20 on the upper and lower end surfaces respectively corresponding to the buckle 311, so as to provide the plurality of magnets 2 with stable positioning relative to the plurality of coupling regions 10, thus solving the problems that when the conventional additional fixing parts are provided, the high precision requirements for the through-holes need to be manufactured, and the problems of limiting the design flexibility. At the same time, the present invention reduces the number of components, the cost and the precision requirements, and further improves the friction force that the interface can withstand, improves the stability of the fixation, and also reduces the risk of any component in the rotor being damaged due to unexpected detachment, resulting in rotor failure and failure.

[0053] The above is a detailed description of the present invention, and the above is only a preferred embodiment of the present invention, which should not limit the scope of the present invention. That is, all equivalent changes and modifications made according to the present invention should still fall within the scope of the patent of the present invention.

Claims

1. A rotor magnet fixing structure, characterized in that: include: A magnetic substrate is formed by a plurality of silicon steel sheets overlapped with each other along the axial direction, and the outer periphery of the magnetic substrate forms at least one bonding area; A plurality of magnets, whose height corresponds to the magnetic base, have an outer flange and an inner edge opposite to the outer flange, wherein the inner edges of the plurality of magnets are respectively arranged in a joint area of ​​the outer peripheral edge of the magnetic base, and at least a portion of the upper end surface and the lower end surface of the plurality of magnets are respectively provided with a groove; and The two end silicon steel sheets are respectively arranged on the upper end surface and the lower end surface of the magnetic substrate. At least one fixing flap is protruded outwardly at the periphery of the two end silicon steel sheets corresponding to the plurality of magnets. The at least one fixing flap covers the upper end surface and the lower end surface of the plurality of magnets respectively, and at least a portion of the at least one fixing flap is respectively protruded axially with a buckle, and the buckle corresponds to the grooves that interfere with and hold the upper end surface and the lower end surface of the plurality of magnets.

2. The rotor magnet fixing structure according to claim 1, characterized in that: The buckles are formed into a wedge shape and each has an inwardly facing fastening wall, and the fastening wall is pressed against an inner side surface of the groove.

3. The rotor magnet fixing structure according to claim 1, characterized in that: The buckle is formed into a semi-cylindrical shape, and a peripheral surface of the buckle corresponds to and is pressed against an inner side surface of the groove.

4. The rotor magnet fixing structure according to claim 1, characterized in that: The outer peripheries of the plurality of silicon steel sheets are respectively provided with corresponding even-numbered extension sections, and the extension sections of the plurality of silicon steel sheets are mutually overlapped along the axial direction to form even-numbered guide arms on both sides of the bonding area of ​​the magnetic substrate.

5. The rotor magnet fixing structure according to claim 4, characterized in that: The number of the plurality of magnets concavely arranged in the groove is greater than two, and the number of the at least one fixing flap of the buckle convexly arranged on the two end silicon steel sheets is greater than two.

6. The rotor magnet fixing structure according to claim 5, characterized in that: The plurality of magnets with the grooves are symmetrically arranged in the combining area of ​​the outer periphery of the magnetic base.

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