A disc motor structure

Abstract

The present invention provides a disc motor structure, comprising: a rotor disc and a rotating shaft, wherein the rotor disc is a rare earth magnetic steel ring, and the rare earth magnetic steel ring is fixedly sleeved on the rotating shaft; a left stator disc, comprising a left magnetic yoke, a left winding and a left end cover, wherein the left magnetic yoke is located between the left winding and the left end cover; a right stator disc, comprising a right magnetic yoke, a right winding and a right end cover, wherein the right magnetic yoke is located between the right winding and the right end cover; the left stator disc and the right stator disc are sleeved on both ends of the rotating shaft, a bearing is provided between the left end cover and the rotating shaft, a bearing is provided between the right end cover and the rotating shaft, and the left winding and the right winding are respectively located on the left and right sides of the rare earth magnetic steel ring. The present invention reduces the amount of rare earth magnetic steel used by means of the structure of double stator discs and a single rotor disc, and the rare earth magnetic steel ring in the present invention is integrally made and integrally magnetized, which greatly facilitates production and effectively improves production efficiency.

Description

Technical Field

[0001] The invention relates to the field of motor structures, and in particular to a disc-type motor structure. Background Art

[0002] Disc motors have developed rapidly in recent years. This motor usually has the characteristics of being coreless, the magnetic field is axial, and the magnets are made of rare earth permanent magnet materials. This type of motor adopts a dual-rotor single-stator structure, and the stator coil is located in the middle of the dual rotors. The magnetic field air gap of this type of motor is large, and a large amount of rare earth permanent magnet materials are required to increase the torque. In order to improve the utilization rate of rare earth permanent magnet materials, Halbach arrays are mostly used to improve the efficiency of magnetic materials. However, it is difficult to magnetize the Halbach array as a whole after assembly, and it is difficult to assemble each small magnet after magnetization, which is very inconvenient in actual processing and production. Therefore, how to improve the production efficiency of disc motors is a technical problem that technicians in this field need to solve. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a disc motor structure that effectively improves production efficiency, so as to overcome the defects of the prior art.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a disc motor structure, comprising:

[0005] A rotor disk and a rotating shaft, wherein the rotor disk is a rare earth magnetic steel ring, and the rare earth magnetic steel ring is fixedly sleeved on the rotating shaft;

[0006] A left stator disc, comprising a left yoke, a left winding and a left end cover, wherein the left yoke is located between the left winding and the left end cover;

[0007] A right stator disc, comprising a right yoke, a right winding and a right end cover, wherein the right yoke is located between the right winding and the right end cover;

[0008] The left stator disc and the right stator disc are sleeved on both ends of the rotating shaft, a bearing is arranged between the left end cover and the rotating shaft, a bearing is arranged between the right end cover and the rotating shaft, and the left winding and the right winding are respectively located on the left and right sides of the rare earth magnetic steel ring.

[0009] Preferably, the rotor disk is fixed on the rotating shaft via a magnetic steel inner sleeve.

[0010] Furthermore, the inner circumference of the magnetic steel inner sleeve is provided with an internal spline, and the outer circumference of the rotating shaft is provided with an external spline that matches the internal spline.

[0011] Furthermore, the magnetic steel inner sleeve is bonded to the rare earth magnetic steel ring.

[0012] Furthermore, a plurality of first notches are provided on the outer circumference of the magnetic steel inner sleeve, a plurality of second notches corresponding to the first notches are opened on the inner circumference of the rare earth magnetic steel ring, and the first notches and the second notches are positioned by means of latches.

[0013] Preferably, the left yoke is adhered to the left end cover, and the right yoke is adhered to the right end cover.

[0014] Preferably, the left winding abuts against the left yoke, and the right winding abuts against the right yoke.

[0015] Preferably, a wire outlet hole is provided on the left end cover or the right end cover.

[0016] Preferably, the left end cover and the right end cover are connected via a housing, the left winding and the right winding are both mounted on the housing, and the rotor disk is located in the housing.

[0017] As described above, the disc motor structure of the present invention has the following beneficial effects:

[0018] 1. The present invention reduces the amount of rare earth permanent magnetic material (rare earth magnetic steel ring) through the structure of double stator disks and single rotor disk.

[0019] 2. The rare earth magnetic steel ring in the present invention is made as a whole, does not need to be assembled from a plurality of small magnetic steels, and can be magnetized as a whole, which greatly facilitates production and effectively improves production efficiency.

[0020] 3. The left winding and the right winding in the present invention can directly cover the end covers on both sides, which greatly facilitates the heat dissipation of the left winding and the right winding, thereby improving the current density of the motor.

[0021] 4. The rare earth magnetic steel ring on the rotor disk of the present invention does not need a turntable support, which further reduces the moment of inertia and is beneficial to improving the dynamic characteristics of the motor.

[0022] 5. The present invention adopts a double stator disk and a single rotor disk structure, eliminating the influence of the mutual attraction between the magnetic steels of the two rotor disks in the single stator disk and double rotor disks, and further optimizes the production process of the disc motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the rotor disk in the present invention.

[0024] Figure 2 for Figure 1 Sectional view at point HH.

[0025] Figure 3 It is a schematic diagram of the disassembly of the rotor disk in the present invention.

[0026] Figure 4 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 5 for Figure 4 Sectional view at point II.

[0028] Figure 6 It is a schematic diagram of the splitting of the present invention.

[0029] Figure 7 This is a first structural diagram of the left magnetic yoke and the right magnetic yoke in the present invention.

[0030] Figure 8 This is a second structural diagram of the left magnetic yoke and the right magnetic yoke in the present invention.

[0031] Fig. 9 This is a third structural diagram of the left magnetic yoke and the right magnetic yoke in the present invention.

[0032] Fig.10 It is a star-shaped view of the series connection of the left stator disc and the right stator disc in the present invention.

[0033] Fig.11 It is a triangular view of the series connection of the left stator disc and the right stator disc in the present invention.

[0034] Fig.12 It is a star-shaped view of the parallel connection of the left stator disc and the right stator disc in the present invention.

[0035] Fig.13 It is a parallel triangle view of the left stator disc and the right stator disc in the present invention.

[0036] In the figure:

[0037] 1 Rotor disk 100 Positioning hole

[0038] 10 Magnetic steel inner sleeve 13 Latch

[0039] 11 Second notch 101 Internal spline

[0040] 102 first notch 4 shaft

[0041] 41 External spline 21 Left yoke

[0042] 22 Left winding 23 Left end cover

[0043] 31 Right yoke 32 Right winding

[0044] 33 Right end cover 5 bearing

[0045] 6 Shell 7 Wire outlet

[0046] 8 Bolt 200 Silicon steel sheet

[0047] 300 Soft magnetic materials DETAILED DESCRIPTION

[0048] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0049] Embodiment 1: Figure 1-Figure 6 As shown, the present invention discloses a disc motor structure, comprising:

[0050] The rotor disk 1 and the shaft 4 are combined Figure 1-Figure 3 The rotor disk 1 is a rare earth magnetic steel ring, which is fixedly sleeved on the rotating shaft 4. The rare earth magnetic steel ring 11 is an integrated disc-shaped structure, which is magnetized once as a whole to form a permanent magnetic steel during processing, and the production process is simple.

[0051] Left stator disc, combined Figure 4-Figure 6 , which includes a left yoke 21, a left winding 22 and a left end cover 23, wherein the left yoke 21 is located between the left winding 22 and the left end cover 23. The right stator disc includes a right yoke 31, a right winding 32 and a right end cover 33, wherein the right yoke 31 is located between the right winding 32 and the right end cover 33. Figure 5 and Figure 6 The left stator disc and the right stator disc are sleeved at both ends of the rotating shaft 4, wherein a bearing 5 is provided between the left end cover 23 and the rotating shaft 4, and a bearing 5 is provided between the right end cover 33 and the rotating shaft 4, and the left winding 22 and the right winding 32 are respectively located on the left and right sides of the rare earth magnetic steel ring. When the rotating shaft 4 rotates, the rotating shaft 4 rotates with the rare earth magnetic steel ring, and the left and right stator discs are relatively fixed.

[0052] The principle of the present invention is: adopting a double stator disk single rotor disk structure, the rotor disk 1 is located between the left stator disk and the right stator disk, and the whole has no iron core, thereby effectively reducing the magnetic field air gap. Specifically: the rare earth magnetic steel ring in the present invention is a rare earth permanent magnetic material, which is a whole disk-shaped structure without an array form, so it is easy to magnetize and improve production efficiency. The rare earth permanent magnetic material refers to a permanent magnetic material made by a certain process of an alloy formed by rare earth metals and transition metals (such as cobalt, iron, etc.). The magnetic field of the rare earth magnetic steel ring is axial magnetization, and the left winding 22 and the right winding 32 on the left stator disk and the right stator disk have the same structure and are arranged in space (axially) overlapping. There is a left yoke 21 on the outside of the left winding 22, and a right yoke 31 on the outside of the right winding 32, which can effectively improve the utilization rate of rare earth permanent magnetic materials. In other words, the present invention can maximize the utilization of rare earth materials and effectively improve production efficiency. The rare earth magnetic steel ring in the present invention does not need a turntable support, further reducing the rotational inertia of the motor rotor, which is beneficial to improving the dynamic characteristics of the motor. Improving the dynamic characteristics means that the motor can increase or decrease speed quickly.

[0053] Embodiment 2:

[0054] Combination Figure 1-Figure 6 On the basis of the first embodiment, specifically, when the shaft 4 is made of non-magnetic material (such as aluminum alloy), it can be directly in contact with the rare earth magnetic steel ring; however, refer to Figure 2 and Figure 3 When the shaft 4 is made of magnetic material (such as alloy steel), it cannot directly contact and cooperate with the rare earth magnetic steel ring. At this time, the rotor disk 1 is fixed on the shaft 4 through the magnetic steel inner sleeve 10. The magnetic steel inner sleeve can be made of non-magnetic materials, such as PPS high-strength engineering plastics, high-strength magnesium-aluminum alloy, etc. Figure 3 As shown, in this embodiment, the inner circumference of the magnetic steel inner sleeve 10 is provided with an inner spline 101, and the outer circumference of the rotating shaft 4 is provided with an outer spline 41 that matches the inner spline 101. In this embodiment, the magnetic steel inner sleeve 10 and the rare earth magnetic steel ring are bonded together by structural adhesive.

[0055] Further, such as Figure 2 and Figure 3 As shown, the outer circumference of the magnetic steel inner sleeve 10 in this embodiment is provided with a plurality of first notches 102, and the inner circumference of the rare earth magnetic steel ring is provided with a plurality of second notches 11 corresponding to the first notches 102, and the first notches 102 and the second notches 11 are positioned by means of a latch 13. This facilitates the fixing of the inner circumference of the rare earth magnetic steel ring with the outer circumference of the magnetic steel inner sleeve 10. In order to ensure the verticality of the magnetic steel inner sleeve 10 and the rotating shaft 4 after assembly, the length of the inner spline 101 and the outer spline 41 is greater than the axial thickness of the magnetic steel inner sleeve 10.

[0056] The specific structure of the left stator disk 2 and the right stator disk 3 in this embodiment is as follows: the left yoke 21 is embedded in and attached to the inner wall of the left end cover 23 by structural adhesive to enhance the strength of the left end cover 23; the right yoke 31 is embedded in and attached to the inner wall of the right end cover 33 by structural adhesive to enhance the strength of the right end cover 33. In order to effectively dissipate heat, the left winding 22 is attached to the left yoke 21, and the right winding 32 is attached to the right yoke 31. Figure 5 , because the area of ​​the left yoke 21 is smaller than the left winding 22, and the area of ​​the right yoke 31 is smaller than the right winding 33, parts of the left winding 22 and the right winding 32 are directly attached to the left end cover 23 and the right end cover 33 respectively. Then, the heat of the left winding 22 is directly dissipated through the left yoke 21 and the left end cover 23, and the heat of the right winding 32 is directly dissipated through the right yoke 31 and the right end cover 33, thereby improving the heat dissipation efficiency, thereby effectively improving the current density of the motor, and also improving the rated power. In addition, a thermal conductive material such as thermal conductive silicone grease can be applied to the left winding 22 and the right winding 32 to further enhance the heat dissipation effect of the left winding 22 and the right winding 32.

[0057] The left magnetic yoke 21 and the right magnetic yoke 31 of the present invention can be formed by rolling and pressing electrical silicon steel sheets 200, and are annular structures composed of multiple concentric cylinders in the axial direction. Figure 7 The left magnetic yoke 21 and the right magnetic yoke 31 can also be made of a non-oriented soft magnetic material 300, such as an integral ring structure made of SMC, refer to Figure 8 The left magnetic yoke 21 and the right magnetic yoke 31 can also be a circular ring structured magnetic yoke formed by splicing a plurality of soft magnetic materials 300 with a fan-shaped structure along the circumferential direction, as shown in FIG. Fig. 9 .

[0058] like Figure 4 As shown in Figure 5, in this embodiment, a wire outlet hole 7 is provided on the right end cover 33 to lead out the motor wires. The wire outlet hole 7 can also be provided on the left end cover 23.

[0059] In this embodiment, reference Figure 6 The left winding 22 and the right winding 32 are respectively provided with positioning holes 100, which are accurately matched and connected to the housing 6 through bolts 8 to ensure that the left winding 22 and the right winding 32 are spatially (axially) overlapped during assembly.

[0060] refer to Figure 5 and Figure 6The left end cover 23 and the right end cover 33 are connected through the housing 6, the housing 6 is an annular structure, the left winding 22 and the right winding 32 are both mounted on the housing 6 by bolts 8, and the left end cover 23 and the right end cover 33 are both connected to the housing 6 by bolts 8. After assembly, the rotor disc 1 is located in the housing 6, and the left stator disc 2 and the right stator disc 3 sandwich the rotor disc 1 in the middle.

[0061] The left winding 22 and the right winding 32 in the present invention are three-phase windings, respectively, and have six contacts. The three-phase winding contacts of the left winding 22 are A11, B11, C11 and A12, B12, C12, respectively, and the three-phase winding contacts of the right winding 32 are A21, B21, C21 and A22, B22, C22, respectively. The contacts of the two windings can be connected in series or in parallel.

[0062] In actual use, Fig.10 It is a series star connection, that is, contacts A12, B12, C12 are respectively connected to contacts A21, B21, C21 as middle contacts, contacts A11, B11, C11 are connected together in sequence, and the lead wires of the entire motor are A22, B22, C22.

[0063] Fig.11 It is a series triangle connection, that is, contacts A12, B12, and C12 are respectively connected to contacts A21, B21, and C21 as middle contacts, and contacts B11, C11, and A11 are respectively connected to contacts A22, B22, and C22. The lead wires of the entire motor are A22, B22, and C22.

[0064] Fig.12 It is a parallel star connection. Contacts A11, B11, and C11 are connected to contacts A21, B21, and C21 respectively. Contacts A11, B11, and C11 are connected together in sequence. Contacts A12, B12, and C12 are connected to contacts A22, B22, and C22 respectively. The lead wires of the entire motor are A22, B22, and C22.

[0065] Fig.13 It is a parallel triangle connection, contacts A11, B11, and C11 are connected to contacts A21, B21, and C21 respectively, contacts A12, B12, and C12 are connected to contacts A22, B22, and C22 respectively, contact A21 is connected to contact B22, contact B21 is connected to contact C22, contact C21 is connected to contact A22, and the lead wires of the entire motor are A22, B22, and C22.

[0066] In summary, the disc motor structure of the present invention can improve production efficiency and save rare earth resources. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A disc motor structure, characterized in that: include: A rotor disk (1) and a rotating shaft (4), wherein the rotor disk (1) is a rare earth magnetic steel ring, and the rare earth magnetic steel ring is fixedly sleeved on the rotating shaft (4); the rare earth magnetic steel ring is an integrated disk-shaped structure; A left stator disk comprises a left magnetic yoke (21), a left winding (22) and a left end cover (23), wherein the left magnetic yoke (21) is located between the left winding (22) and the left end cover (23); A right stator disk comprises a right magnetic yoke (31), a right winding (32) and a right end cover (33), wherein the right magnetic yoke (31) is located between the right winding (32) and the right end cover (33); The left stator disc and the right stator disc are sleeved at both ends of the rotating shaft (4); a bearing (5) is provided between the left end cover (23) and the rotating shaft (4); a bearing (5) is provided between the right end cover (33) and the rotating shaft (4); and the left winding (22) and the right winding (32) are respectively located on the left and right sides of the rare earth magnetic steel ring; The left yoke (21) is pasted on the left end cover (23), and the right yoke (31) is pasted on the right end cover (33); the area of ​​the left yoke (21) is smaller than the area of ​​the left winding (22), and the area of ​​the right yoke (31) is smaller than the area of ​​the right winding (32); The left winding (22) is in contact with the left magnetic yoke (21), and the right winding (32) is in contact with the right magnetic yoke (31); the heat of the left winding (22) is directly dissipated through the left magnetic yoke (21) and the left end cover (23), and the heat of the right winding (32) is directly dissipated through the right magnetic yoke (31) and the right end cover (33); Positioning holes (100) are respectively provided on the left winding (22) and the right winding (32), and the positioning holes (100) are connected to the housing (6) via bolts (8); The rotor disk (1) is fixed on the rotating shaft (4) via a magnetic steel inner sleeve (10); The inner circumference of the magnetic steel inner sleeve (10) is provided with an internal spline (101), and the outer circumference of the rotating shaft (4) is provided with an external spline (41) that matches the internal spline (101).

2. A disc motor structure according to claim 1, characterized in that: The magnetic steel inner sleeve (10) is bonded together with the rare earth magnetic steel ring (1).

3. A disc motor structure according to claim 1, characterized in that: A plurality of first notches (102) are provided on the outer circumference of the magnetic steel inner sleeve (10), and a plurality of second notches (11) corresponding to the first notches (102) are opened on the inner circumference of the rare earth magnetic steel ring, and the first notches (102) and the second notches (11) are positioned by means of a latch.

4. A disc motor structure according to claim 1, characterized in that: The left end cover (23) or the right end cover (33) is provided with a wire outlet hole (7).

5. The disc motor structure according to claim 1, characterized in that: The left end cover (23) and the right end cover (33) are connected via a housing (6), the left winding (22) and the right winding (32) are both mounted on the housing (6), and the rotor disk (1) is located in the housing (6).

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