Motor rotor and motor

Abstract

The utility model discloses a motor rotor and a motor, the motor rotor is applied to the motor based on a circuit board stator, the motor rotor comprises an annular base, one annular surface of the base is provided with an annular installation groove, the installation groove is internally provided with annular integrated magnetic steel, and the integrated magnetic steel is provided with a plurality of magnetic areas. The motor comprises a circuit board stator and the motor rotor. According to the motor rotor and the motor, the integrated magnetic steel is adopted, the magnetic area is arranged on the integrated magnetic steel, the integrated magnetic steel is directly pressed into the mounting groove of the base during assembly, the assembly is simple, the overall structure of the rotor is more compact, and the motor with a compact structure can be prepared by matching with a circuit board stator.

Description

Technical Field

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

[0002] A new type of motor that uses a circuit board made of PCB board as a stator. The traditional rotor is composed of a magnetic steel embedded in the rotor frame. The assembly process of this structure is to first make a permanent magnet magnetic steel, and then embed the magnetic steel into the rotor frame;

[0003] The advantage of the traditional process is its simplicity, but its disadvantage is that when the distance between adjacent magnets is very close, the assembly will be affected by the force of the magnetic field between the magnets. Therefore, there must be a certain gap between the magnets on the rotor of the traditional process, which leads to a larger overall volume of the rotor. The motor based on the circuit board stator has a very important advantage in its compact structure and small volume. Therefore, it is necessary to design a new type of rotor to solve the above problem. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a motor rotor and a motor. The motor rotor and the motor adopt an integrated magnetic steel, and a magnetic area is set on the integrated magnetic steel. During assembly, the integrated magnetic steel can be directly pressed into the mounting groove of the base. The assembly is simple, and the overall structure of the rotor is more compact. In combination with the circuit board stator, a compact motor can be prepared.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] On the one hand, the utility model provides a motor rotor, which is applied to a motor based on a circuit board stator, including an annular base, a circular surface of the base is provided with an annular mounting groove, a circular integral magnetic steel is provided in the mounting groove, and a plurality of magnetic regions are provided on the integral magnetic steel.

[0007] The integrated magnet is not magnetic before assembly, so there is no need to consider the influence of the magnetic field when assembling the integrated magnet and the base. The assembly can be completed by directly pressing the integrated magnet into the installation slot. After pressing in, the integrated magnet is magnetized in different areas using a magnetizing machine, so that the integrated magnet has multiple magnetic areas, thus completing the rotor processing technology. Although the motor rotor structure of the utility model adds the step of magnetizing in different areas during processing, only one pressing step is required when assembling the integrated magnet, so the efficiency is not inferior to the traditional process.

[0008] In a further technical solution, the magnetic region is fan-shaped, and a plurality of magnetic regions are arranged in a circular array with the center of the integrated magnetic steel as the center.

[0009] The fan-shaped magnetic areas arranged in a ring array can maximize the volume of the integrated magnetic steel, improve space utilization, and have a compact structure.

[0010] In a further technical solution, a limiting groove is provided at the bottom of the integrated magnetic steel, and a limiting block is provided at the bottom of the mounting groove of the base, and the limiting block matches the shape and size of the limiting groove.

[0011] The setting of the limit groove and the limit block can effectively enhance the position stability of the integrated magnetic steel.

[0012] In a further technical solution, a first positioning structure for positioning the circumferential position of the integrated magnetic steel is provided on the outer ring of the mounting groove.

[0013] When the integrated magnetic steel is pressed into the installation groove as a whole, since the limit groove and the limit block need to cooperate in the circumferential direction, a first positioning structure is set on the base. The integrated magnetic steel is positioned by the first positioning structure during pressing, so that the circumferential position of the integrated magnetic steel can be guaranteed, thereby improving the processing yield.

[0014] In a further technical solution, a second positioning structure for positioning the radial position of the integrated magnetic steel is provided on the inner ring of the mounting groove.

[0015] The first positioning structure positions the circumferential position of the integrated magnetic steel, and the second positioning structure and the first positioning structure are respectively arranged on the inner ring and the outer ring of the mounting groove, so they can cooperate with each other to realize the radial position positioning of the integrated magnetic steel. In cooperation with the second positioning mechanism for the radial position of the integrated magnetic steel, the positioning accuracy of the integrated magnetic steel is higher and the processing yield is higher.

[0016] In a further technical solution, the second positioning structure is arranged on the same diameter direction of the mounting groove as the first positioning structure and on the other side of the center of the first positioning structure.

[0017] The existence of the first positioning structure will affect the dynamic balance of the rotor, and arranging the second positioning structure on the other side of the center of the first positioning structure can reduce this influence and improve the dynamic stability of the rotor.

[0018] In a further technical solution, at least one of the volume and weight of the second positioning structure is greater than that of the first positioning structure.

[0019] Since the position of the second positioning structure is closer to the center of the circle than the first positioning structure, the moment of the second positioning structure on the center of the circle relative to the first positioning structure is smaller. Therefore, when at least one of the volume or weight of the second positioning structure is greater than that of the first positioning structure, the lever arm of the second positioning structure can be greater than that of the first positioning structure. Ultimately, the effects of the first positioning structure and the second positioning structure on the dynamic balance of the rotor offset each other, thereby further improving the dynamic stability of the rotor.

[0020] In a further technical solution, the limit block includes at least one progressive surface in the diameter direction of the installation groove.

[0021] Although the mounting groove itself can play a positioning role in the pressing of the integrated magnet, the possible error will cause a slight deviation of the axis of the integrated magnet. When the axis of the integrated magnet is offset, it will also affect the dynamic stability of the rotor. Therefore, a progressive surface is set on the limit block. During the pressing process of the integrated magnet, the integrated magnet will fine-tune the axial position along the progressive surface so that the axis of the integrated magnet coincides with the axis of the base, thereby further ensuring the dynamic stability of the rotor.

[0022] On the other hand, the utility model further provides a motor, which includes a circuit board stator and a motor rotor as described in any of the above technical solutions.

[0023] The motor rotor of the utility model adopts an integrated magnetic steel, on which a magnetic area is arranged. During assembly, the integrated magnetic steel can be directly pressed into the mounting groove of the base. The assembly is simple, and the overall structure of the rotor is more compact. A compact motor can be prepared in combination with a circuit board stator.

[0024] The beneficial effects are:

[0025] 1. The motor rotor of the utility model adopts an integrated magnetic steel, and a magnetic area is set on the integrated magnetic steel. During assembly, the integrated magnetic steel can be directly pressed into the installation groove of the base. The assembly is simple, and the overall structure of the rotor is more compact. A compact motor can be prepared in combination with a circuit board stator.

[0026] 2. The magnetic region is fan-shaped, and multiple magnetic regions are arranged in a circular array with the center of the integrated magnetic steel as the center.

[0027] The fan-shaped magnetic areas arranged in a ring array can maximize the volume of the integrated magnetic steel, improve space utilization, and have a compact structure.

[0028] 3. The setting of the limit groove and the limit block can effectively enhance the position stability of the integrated magnetic steel.

[0029] 4. When the integrated magnetic steel is pressed into the installation groove as a whole, since the limit groove and the limit block need to cooperate in the circumferential direction, a first positioning structure is set on the base. The integrated magnetic steel is positioned by the first positioning structure during pressing, so that the circumferential position of the integrated magnetic steel can be guaranteed, thereby improving the processing yield.

[0030] 5. The first positioning structure positions the circumferential position of the integrated magnetic steel, and the second positioning structure and the first positioning structure are respectively arranged on the inner ring and the outer ring of the mounting groove, so they can cooperate with each other to realize the radial position positioning of the integrated magnetic steel. In cooperation with the second positioning mechanism for the radial position of the integrated magnetic steel, the positioning accuracy of the integrated magnetic steel is higher and the processing yield is higher.

[0031] 6. The existence of the first positioning structure will affect the dynamic balance of the rotor, and setting the second positioning structure on the other side of the center of the first positioning structure can reduce this influence and improve the dynamic stability of the rotor.

[0032] 7. Since the position of the second positioning structure is closer to the center of the circle than the first positioning structure, the moment of the second positioning structure on the center of the circle relative to the first positioning structure is smaller. Therefore, when at least one of the volume or weight of the second positioning structure is greater than that of the first positioning structure, the lever arm of the second positioning structure can be greater than that of the first positioning structure. Ultimately, the effects of the first positioning structure and the second positioning structure on the dynamic balance of the rotor offset each other, thereby further improving the dynamic stability of the rotor.

[0033] 8. Although the mounting groove itself can play a positioning role in the pressing of the integrated magnetic steel, the possible error will cause a slight deviation of the axis of the integrated magnetic steel. When the axis of the integrated magnetic steel is offset, it will also affect the dynamic stability of the rotor. Therefore, a progressive surface is set on the limit block. During the pressing process of the integrated magnetic steel, the integrated magnetic steel will fine-tune the axial position along the progressive surface so that the axis of the integrated magnetic steel coincides with the axis of the base, thereby further ensuring the dynamic stability of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural schematic diagram of the motor rotor of an embodiment of the utility model;

[0035] Figure 2 is a top view of the motor rotor of an embodiment of the utility model;

[0036] Figure 3 is a cross-sectional view of a motor rotor of one embodiment of the utility model;

[0037] Figure 4 is a cross-sectional view of a motor rotor according to another embodiment of the utility model;

[0038] Figure 5It is a cross-sectional view of a motor rotor according to yet another embodiment of the utility model.

[0039] 10. Base; 11. Limit block; 12. First positioning structure; 13. Second positioning structure; 20. Integrated magnetic steel; 21. Limit groove. DETAILED DESCRIPTION

[0040] The utility model is further described below in conjunction with the accompanying drawings:

[0041] Example:

[0042] A motor rotor is used for a motor based on a circuit board stator, such as Figure 1 As shown, it includes an annular base 10, a circular surface of the base 10 is provided with an annular mounting groove, and an annular integrated magnetic steel 20 is provided in the mounting groove. Figure 2 As shown, the integrated magnetic steel 20 is provided with a plurality of magnetic zones, and the magnetic zones are indicated by dotted lines. There are no lines on the actual product, and the dotted lines are for display only.

[0043] The integrated magnet 20 is not magnetic before assembly, so there is no need to consider the influence of the magnetic field when assembling the integrated magnet 20 and the base 10. The assembly can be completed by directly pressing the integrated magnet 20 into the installation groove. After pressing in, the integrated magnet 20 is magnetized in different zones through a magnetizing machine so that the integrated magnet 20 has multiple magnetic zones, thus completing the rotor processing technology. Although the motor rotor structure of the utility model adds the step of magnetizing zones during processing, only one pressing step is required when assembling the integrated magnet 20, so the efficiency is not inferior to the traditional process.

[0044] A motor comprises a circuit board stator and the above motor rotor.

[0045] The motor rotor of the utility model adopts an integrated magnetic steel 20, and a magnetic area is set on the integrated magnetic steel 20. During assembly, the integrated magnetic steel 20 can be directly pressed into the installation groove of the base 10. The assembly is simple, and the overall structure of the rotor is more compact. In combination with the circuit board stator, a compact motor can be prepared.

[0046] In another embodiment, if Figure 2 As shown, the magnetic region is fan-shaped, and multiple magnetic regions are arranged in a ring array with the center of the integrated magnetic steel 20 as the center.

[0047] The fan-shaped magnetic areas arranged in a ring array can maximize the volume of the integrated magnetic steel, improve space utilization, and have a compact structure.

[0048] In another embodiment, if Figure 3As shown, a limiting groove 21 is provided at the bottom of the integrated magnetic steel 20 , and a limiting block 11 is provided at the bottom of the mounting groove of the base 10 , and the limiting block 11 matches the shape and size of the limiting groove 21 .

[0049] In this embodiment, a plurality of limit grooves 21 and limit blocks 11 are respectively provided, and the plurality of limit grooves 21 and limit blocks 11 are structures arranged along the radial direction of the integrated magnetic steel 20 and the installation groove, and the plurality of limit grooves 21 and limit blocks 11 are respectively arranged in a circular array with the center of the integrated magnetic steel 20 and the installation groove as the center.

[0050] In this embodiment, the limiting block 11 is a cubic structure.

[0051] The arrangement of the limiting groove 21 and the limiting block 11 can effectively enhance the position stability of the integrated magnetic steel.

[0052] In another embodiment, if Figure 3 As shown, a first positioning structure 12 for positioning the circumferential position of the integrated magnetic steel 20 is provided on the outer ring of the mounting groove.

[0053] When the integrated magnetic steel 20 is pressed into the installation groove as a whole, since the limit groove 21 and the limit block 11 need to cooperate in the circumferential direction, a first positioning structure 12 is set on the base 10. The integrated magnetic steel 20 is positioned by the first positioning structure 12 during pressing, so that the circumferential position of the integrated magnetic steel 20 can be guaranteed, thereby improving the processing yield.

[0054] In this embodiment, the first positioning structure 12 is a groove formed on the top of the inner wall of the outer ring of the installation groove. The groove is selected instead of a protruding structure in order to reduce the resistance of the rotor when it rotates at high speed.

[0055] In another embodiment, the first positioning structure 12 is a positioning column.

[0056] In another embodiment, if Figure 3 As shown, a second positioning structure 13 for positioning the radial position of the integrated magnetic steel 20 is provided on the inner ring of the mounting groove.

[0057] The first positioning structure 12 positions the circumferential position of the integrated magnetic steel 20, and the second positioning structure 13 and the first positioning structure 12 are respectively arranged on the inner ring and the outer ring of the mounting groove, so they can cooperate with each other to realize the radial position positioning of the integrated magnetic steel 20. In cooperation with the second positioning mechanism for the radial position of the integrated magnetic steel 20, the positioning accuracy of the integrated magnetic steel 20 is higher and the processing yield is higher.

[0058] The second positioning structure 13 is a groove provided on the top of the outer wall of the inner ring of the installation groove. The groove is selected instead of a protruding structure in order to reduce the resistance of the rotor when it rotates at high speed.

[0059] In another embodiment, the second positioning structure 13 is a positioning column.

[0060] It is understandable that the first positioning structure 12 and the second positioning structure 13 are both for positioning the integrated magnetic steel 20 and the base 10 during the pressing process, so the corresponding laser device or other positioning device should be set on the pressing equipment, which will not be repeated here.

[0061] In another embodiment, if Figure 3 As shown, the second positioning structure 13 is arranged on the same diameter direction of the mounting groove as the first positioning structure 12 and on the other side of the center of the first positioning structure 12 .

[0062] The existence of the first positioning structure 12 will affect the dynamic balance of the rotor, and arranging the second positioning structure 13 on the other side of the center of the first positioning structure 12 can reduce this influence and improve the dynamic stability of the rotor.

[0063] In another embodiment, if Figure 3 As shown, at least one of the volume and weight of the second positioning structure 13 is greater than that of the first positioning structure 12 .

[0064] Since the position of the second positioning structure 13 is closer to the center of the circle relative to the first positioning structure 12, the moment of the second positioning structure 13 on the center of the circle relative to the first positioning structure 12 is smaller. Therefore, when at least one of the volume or weight of the second positioning structure 13 is greater than the first positioning structure 12, the lever arm of the second positioning structure 13 can be greater than the first positioning structure 12, and ultimately the effects of the first positioning structure 12 and the second positioning structure 13 on the dynamic balance of the rotor are offset, further improving the dynamic stability of the rotor.

[0065] In this embodiment, the first positioning structure 12 and the second positioning structure 13 are grooves, and the volume of the second positioning structure 13 is larger than that of the first positioning structure 12 .

[0066] In another embodiment, the first positioning structure 12 and the second positioning structure 13 are protruding positioning columns, and the weight of the second positioning structure 13 is greater than that of the first positioning structure 12 .

[0067] The significance of providing the positioning columns is that when the first positioning structure 12 and the second positioning structure 13 are positioning columns, the calculation of the force arm and the moment is relatively simple, and it is convenient to design the weight of the two.

[0068] In another embodiment, the limiting block 11 includes at least one progressive surface in the diameter direction of the installation groove.

[0069] like Figure 4As shown, the cross-section of the limit block 11 of the present embodiment is triangular, that is, it has a gradual slope. During the pressing process of the integrated magnetic steel 20, the slope of the limit groove 21 contacts the slope of the limit block 11, providing the integrated magnetic steel 20 with a force to move toward the center of the base 10, so as to correct the slight radial position deviation of the integrated magnetic steel 20.

[0070] Although the mounting groove itself can play a positioning role in the pressing of the integrated magnetic steel 20, the possible error will cause a slight deviation of the axis of the integrated magnetic steel 20. When the axis of the integrated magnetic steel 20 is offset, it will also affect the dynamic stability of the rotor. Therefore, a progressive surface is set on the limit block 11. During the pressing process of the integrated magnetic steel 20, the integrated magnetic steel 20 will fine-tune the axial position along the progressive surface so that the axis of the integrated magnetic steel 20 coincides with the axis of the base 10, thereby further ensuring the dynamic stability of the rotor.

[0071] In another embodiment, if Figure 5 As shown, the top surface of the limit block 11 in this embodiment is an arc surface, and the arc surface has two progressive surfaces. The two progressive surfaces can apply reaction forces to the limit slot 21 in two directions to better correct the slight radial position deviation of the integrated magnetic steel 20.

[0072] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A motor rotor, applied to a motor based on a circuit board stator, characterized in that: It comprises an annular base, a circular surface of which is provided with an annular mounting groove, a circular integral magnetic steel is arranged in the mounting groove, and a plurality of magnetic regions are arranged on the integral magnetic steel.

2. The motor rotor according to claim 1, characterized in that: The magnetic region is fan-shaped, and a plurality of magnetic regions are arranged in a ring array with the center of the integrated magnetic steel as the center.

3. The motor rotor according to claim 1 or 2, characterized in that: A limiting groove is provided at the bottom of the integrated magnetic steel, and a limiting block is provided at the bottom of the mounting groove of the base, and the limiting block matches the shape and size of the limiting groove.

4. The motor rotor according to claim 3, characterized in that: A first positioning structure for positioning the circumferential position of the integrated magnetic steel is arranged on the outer ring of the mounting groove.

5. The motor rotor according to claim 4, characterized in that: A second positioning structure for positioning the radial position of the integrated magnetic steel is arranged on the inner ring of the mounting groove.

6. The motor rotor according to claim 5, characterized in that: The second positioning structure is arranged on the same diameter direction of the mounting groove as the first positioning structure and on the other side of the center of the first positioning structure.

7. The motor rotor according to claim 6, characterized in that: At least one of a volume and a weight of the second positioning structure is greater than that of the first positioning structure.

8. The motor rotor according to claim 3, characterized in that: The limiting block comprises at least one progressive surface in the diameter direction of the installation groove.

9. A motor, characterized in that: The motor comprises a circuit board stator and a motor rotor as claimed in any one of claims 1 to 8.

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