Square motor

Abstract

The utility model discloses a square motor. The square motor comprises a stator and a rotor located in the stator. The stator comprises a shell and four permanent magnets; the cross section of the shell is rectangular, and the shell comprises four planar side walls and inclined straight surface connecting parts for connecting two adjacent side walls; a first transition fillet is arranged between the inclined straight surface connecting part and the adjacent side wall; the four permanent magnets are tightly attached to the inner side walls of the inclined straight face connecting parts respectively, and the side faces, close to the rotor, of the permanent magnets are provided with arc face parts. Compared with a circular motor, the motor is easier to transport and install stably, rolling caused by unstable structure is avoided, the shell structure of the square motor has a large surface area, heat dissipation is facilitated, the service life of the motor running under the long-time high-load working condition is prolonged, and reliability is high; the arrangement of the inclined straight surface connecting part and the first transition fillet can improve the hand feeling of the user holding the motor, and prevents the hand from being hurt.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a square motor. Background Art

[0002] In the prior art, most traditional motors have stators made into cylindrical shapes, with rotors installed in the stators, and end covers added to both sides of the cylinder axis to form the main structure of the motor. The cylindrical stator structure is mainly convenient for setting magnets on the inner wall of the stator. The magnets are of the same shape, which is convenient for large-scale production, and the shape will not be selected due to different placement positions on the inner wall of the stator. However, the cylindrical stator has the problem of rolling easily during transportation, causing the internal magnets to be easily broken during rolling, thus affecting the normal use of the motor; and the cylindrical motor needs to add additional fixings when in use, such as locking screws or clamps, etc., which makes the installation process of the motor more cumbersome and the installation cost higher.

[0003] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a square motor which has good structural stability and is easy to install and transport.

[0005] To achieve this object, the utility model adopts the following technical solution: a square motor, comprising a stator and a rotor located inside the stator;

[0006] The stator comprises a housing and four permanent magnets;

[0007] The cross-sectional shape of the shell is rectangular, and the shell includes four planar side walls and an oblique straight surface connecting portion connecting two adjacent side walls;

[0008] A first transition fillet is provided between the oblique straight surface connecting portion and the adjacent side wall;

[0009] The housing is provided with a containing space for accommodating the rotor and the permanent magnet;

[0010] The four permanent magnets are respectively and closely attached to the inner side walls of the oblique straight surface connection portion, and the side of the permanent magnet close to the rotor is provided with an arc surface portion.

[0011] By adopting the above technical solution, in the square motor, the side end of the permanent magnet close to the oblique straight surface connecting portion is provided with a first plane portion;

[0012] A second plane portion and a third plane portion are respectively disposed on both sides of the first plane portion, and the second plane portion and the third plane portion are respectively in contact with the inner side wall of the shell.

[0013] By adopting the above-mentioned technical solutions, in the square motor, the permanent magnet is bonded to the inner side wall of the oblique straight surface connection part by glue.

[0014] By adopting the above-mentioned technical solutions, in the square motor, a supporting step is provided at the corner of the accommodating space, and the supporting step is used to abut and support the permanent magnet.

[0015] By adopting the above-mentioned technical solutions, in the square motor, a second transition fillet is provided at the connection between the second plane portion and the third plane portion and the arc surface portion.

[0016] By adopting the above-mentioned technical solutions, in the square motor, two adjacent permanent magnets are integrally connected to form a magnetic ring structure.

[0017] By adopting the above-mentioned technical solutions, in the square motor, the rotor includes an iron core and a rotating shaft connected to the middle of the iron core, and the iron core is formed by a plurality of silicon steel sheets rotated and stacked along the axial direction.

[0018] By adopting the above-mentioned technical solutions, in the square motor, an opening is provided on the top of the shell, the distance between the top surface of the permanent magnet and the opening is a first distance, the distance between the iron core and the opening is a second distance, and the first distance is smaller than the second distance.

[0019] By adopting the above-mentioned technical solutions, in the square motor, a gap is provided between the arc surface portion of the permanent magnet and the iron core, and the gap is 0.5-3 mm.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The shell cross-section of the square motor of the utility model is rectangular, and the shell includes four planar side walls and an oblique straight surface connection portion connecting two adjacent side walls. Compared with a circular motor, it is easier to transport and install stably and avoid rolling caused by an unstable structure. In addition, the shell structure of the square motor has a large surface area, which is conducive to heat dissipation, thereby increasing the service life of the motor under long-term high-load conditions, and the motor has high reliability. The oblique straight surface connection portion and the first transition fillet are arranged to improve the user's grip on the motor and avoid hand discomfort. The arc portion arranged on the permanent magnet can reduce the gap between the permanent magnet and the rotor, thereby reducing the magnetic field leakage phenomenon and improving the efficiency and performance of the motor. The iron core is formed by rotating and stacking a plurality of silicon steel sheets. Such an arrangement can reduce the magnetic resistance loss and eddy current loss of the rotor, increase the magnetic pull, and thus improve the operating efficiency and performance of the micromotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0025] Figure 2 This is a schematic diagram of the top view of the structure of Example 1 of the utility model;

[0026] Figure 3 This is a schematic diagram of the stator structure of Example 1 of the utility model;

[0027] Figure 4 This is a schematic diagram of the rotor connection structure of Example 1 of the utility model;

[0028] Figure 5 This is a schematic diagram of the stator structure of Example 2 of the utility model. DETAILED DESCRIPTION

[0029] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0031] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0032] Example 1

[0033] like Figures 1 to 4 As shown, an embodiment of the utility model provides a square motor, comprising a stator 1 and a rotor 2 located in the stator 1;

[0034] The stator 1 includes a shell 11 and four permanent magnets 12; the cross-sectional shape of the shell 11 is rectangular, and the shell 11 includes four planar side walls 110 and an oblique straight surface connecting portion 111 connecting two adjacent side walls 110; the cross-sectional shape of the shell 11 is rectangular, and the shell 11 includes four planar side walls 110 and an oblique straight surface connecting portion 111 connecting two adjacent side walls 110. Compared with a circular motor, it is easier to transport and install stably to avoid rolling caused by an unstable structure, and the shell 11 structure of the square motor has a larger surface area, which is conducive to heat dissipation, thereby increasing the service life of the motor under long-term high-load conditions, and the motor has high reliability.

[0035] A first transition fillet 112 is provided between the oblique straight surface connection portion 111 and the adjacent side wall 110; a receiving space 113 for accommodating the rotor 2 and the permanent magnet 12 is provided inside the shell 11; the setting of the oblique straight surface connection portion 111 and the first transition fillet 112 can improve the user's grip on the motor and avoid hurting the hand.

[0036] The four permanent magnets 12 are respectively closely attached to the inner side walls of the oblique straight surface connection portion 111, and the side of the permanent magnet 12 close to the rotor 2 is provided with an arc surface portion 120. The arc surface portion 120 provided on the permanent magnet 12 can reduce the gap between the permanent magnet 12 and the rotor 2, thereby reducing the magnetic field leakage phenomenon and improving the efficiency and performance of the motor.

[0037] like Figures 1 to 3As shown, further, the permanent magnet 12 is provided with a first plane portion 121 at the side end close to the oblique straight surface connection portion 111; the first plane portion 121 is provided with a second plane portion 122 and a third plane portion 123 on both sides thereof, and the second plane portion 122 and the third plane portion 123 are respectively fitted with the inner side wall of the housing 11. The first plane portion 121, the second plane portion 122 and the third plane portion 123 of the permanent magnet 12 are respectively closely fitted with the inner side wall of the housing 11, which can increase the stability of the permanent magnet 12 during high-speed rotation, reduce vibration and noise, and improve the reliability and life of the motor.

[0038] Furthermore, the permanent magnet 12 is glued to the inner side wall of the oblique straight surface connection portion 111. Glue bonding can increase the mechanical connection strength between the permanent magnet 12 and the housing 11, making the permanent magnet 12 more stable, thereby reducing the displacement and looseness of the permanent magnet 12, improving the mechanical stability of the motor, and avoiding the risk of the permanent magnet 12 falling off due to vibration and impact.

[0039] like Figure 3 As shown, further, a supporting step 114 is provided at the corner of the accommodating space 113, and the supporting step 114 is used to abut and support the permanent magnet 12. The supporting step 114 can increase the height of the permanent magnet 12, so that the permanent magnet 12 has a certain gap from the bottom of the accommodating space 113, thereby helping the permanent magnet 12 to achieve faster heat dissipation. In this embodiment, the permanent magnet 12 is made of neodymium iron boron. Neodymium iron boron has an extremely high magnetic energy density, which enables neodymium iron boron to generate a strong magnetic field in a relatively small volume, thereby improving the magnetic properties of the motor.

[0040] like Figures 1 to 3 As shown, further, a second transition fillet 124 is provided at the connection between the second plane portion 122 and the third plane portion 123 and the arc surface portion 120. The second transition fillet 124 can achieve a smooth transition, connect the second plane portion 122 and the third plane portion 123 with the arc surface portion 120, eliminate sharp edges and mutations, make the magnetic field change more gently and continuously in the transition area, thereby reducing the mutation of the magnetic field gradient, thereby improving the uniformity and stability of the magnetic field distribution of the motor.

[0041] like Figure 1 and Figure 4 As shown, further, the rotor 2 includes an iron core 21 and a rotating shaft 22 connected to the middle of the iron core 21. The iron core 21 is formed by a plurality of silicon steel sheets rotated and stacked along its axial direction. Such a configuration can reduce the magnetic resistance loss and eddy current loss of the rotor 2, increase the magnetic pull, and thus improve the operating efficiency and performance of the micromotor.

[0042] like Figure 1As shown, further, the top of the housing 11 is provided with an opening, the distance between the top surface of the permanent magnet 12 and the opening is a first spacing, the distance between the iron core 21 and the opening is a second spacing, and the first spacing is smaller than the second spacing. In the motor, the magnetic field is conducted through the iron core 21, but during operation, the magnetic field leaks from the iron core 21 to the surrounding environment, i.e., magnetic leakage. By setting the distance between the top surface of the permanent magnet 12 and the opening to a smaller first spacing, the degree of magnetic leakage can be reduced, so that more magnetic field can be conducted through the iron core 21, thereby improving the efficiency and performance of the motor.

[0043] like Figure 2 As shown, further, a gap is provided between the arc surface 120 of the permanent magnet 12 and the iron core 21, and the gap is 0.5-3 mm. In this embodiment, the gap is 1 mm.

[0044] Example 2

[0045] like Figure 5 As shown, the embodiment of the utility model provides a square motor, which is different from the embodiment 1 in that the two adjacent permanent magnets are connected in an integral manner to form a magnetic ring structure 125. By forming the magnetic ring structure 125, the continuity of the magnetic circuit can be improved, the gap between the permanent magnets can be reduced, and the magnetic field can be more smoothly conducted between the adjacent permanent magnets, thereby reducing the magnetic field leakage phenomenon, and the connection between the adjacent permanent magnets can enhance the strength of the magnetic field, making the magnetic field more concentrated and powerful, thereby increasing the output power and torque of the motor and improving the performance of the motor; in addition, the mechanical stability of the motor can also be improved, reducing the risk of loosening or falling off of the permanent magnets, while simplifying the manufacturing and assembly process of the motor.

[0046] The cross-sectional shape of the shell 11 of the square motor of the utility model is rectangular. The shell 11 includes four planar side walls 110 and an oblique straight surface connection part 111 connecting two adjacent side walls 110. Compared with a circular motor, it is easier to transport and install stably to avoid rolling caused by an unstable structure. In addition, the shell 11 structure of the square motor has a large surface area, which is conducive to heat dissipation, thereby increasing the service life of the motor under long-term high-load conditions, and the motor has high reliability; the oblique straight surface connection part 111 and the first transition fillet 112 are set to improve the user's grip on the motor and avoid hurting the hand; the arc portion 120 set on the permanent magnet 12 can reduce the gap between the permanent magnet 12 and the rotor 2, thereby reducing the magnetic field leakage phenomenon and improving the efficiency and performance of the motor; the iron core 21 is formed by rotating and stacking a plurality of silicon steel sheets. Such a setting can reduce the magnetic resistance loss and eddy current loss of the rotor 2, increase the magnetic pull, and thus improve the operating efficiency and performance of the micromotor.

[0047] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A square motor, characterized in that: comprising a stator and a rotor located in the stator; The stator comprises a housing and four permanent magnets; The cross-sectional shape of the shell is rectangular, and the shell includes four planar side walls and an oblique straight surface connecting portion connecting two adjacent side walls; A first transition fillet is provided between the oblique straight surface connecting portion and the adjacent side wall; The housing is provided with a containing space for accommodating the rotor and the permanent magnet; The four permanent magnets are respectively and closely attached to the inner side walls of the oblique straight surface connection portion, and the side of the permanent magnet close to the rotor is provided with an arc surface portion.

2. The square motor according to claim 1, characterized in that: The side end of the permanent magnet close to the oblique straight surface connecting portion is provided with a first plane portion; A second plane portion and a third plane portion are respectively disposed on both sides of the first plane portion, and the second plane portion and the third plane portion are respectively in contact with the inner side wall of the shell.

3. The square motor according to claim 1, characterized in that: The permanent magnet is bonded to the inner side wall of the oblique straight surface connecting portion by glue.

4. The square motor according to claim 1, characterized in that: A supporting step is provided at a corner of the accommodating space, and the supporting step is used for abutting and supporting the permanent magnet.

5. The square motor according to claim 2, characterized in that: A second transition fillet is provided at the connection between the second plane portion, the third plane portion and the arc surface portion.

6. The square motor according to claim 1, characterized in that: Two adjacent permanent magnets are connected in one piece to form a magnetic ring structure.

7. The square motor according to claim 4, characterized in that: The rotor comprises an iron core and a rotating shaft connected to the middle of the iron core. The iron core is formed by rotating and stacking a plurality of silicon steel sheets along the axial direction.

8. The square motor according to claim 7, characterized in that: An opening is provided on the top of the shell, the distance between the top surface of the permanent magnet and the opening is a first distance, the distance between the iron core and the opening is a second distance, and the first distance is smaller than the second distance.

9. The square motor according to claim 8, characterized in that: A gap is provided between the arc surface of the permanent magnet and the iron core, and the gap is 0.5-3 mm.

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