Disc type motor

Abstract

The invention discloses a disc type motor, which comprises a stator assembly, a circuit board, a plurality of winding groups and a lug plate assembly, and is characterized in that the circuit board is provided with a first end face and a second end face; the winding groups are arranged on the first end face, each winding group comprises a coil, and the coils are attached to the first end face; the coil is provided with a first terminal and a second terminal; the first wiring end and the second wiring end penetrate through the second end face; the lug plate assembly comprises a first lug plate and a second lug plate, the first lug plate and the second lug plate are both attached to the second end face, and the first lug plate is electrically connected with the first terminal; the second lug plate is electrically connected with the second terminal; the rotor assembly comprises a rotor and a permanent magnet; the end face of the rotor opposite to the first end face is provided with a permanent magnet. The coil is directly attached to the first end face of the circuit board, and meanwhile the first lug plate and the second lug plate are attached to the second end face of the circuit board, so that the wiring structure and the wiring structure are simple, and the size is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a disc motor. Background Art

[0002] Traditional motors generally include a stator assembly and a rotor assembly. The stator assembly is usually a stator core, with enameled wire wound around the stator core and an annular permanent magnet arranged outside the stator core. The winding group on the stator core is then connected to a circuit board to connect current, thereby generating a magnetic field.

[0003] However, the coil structure wound on the stator core is very crowded and the wiring is complicated. The stator assembly and the circuit board are set separately, resulting in a larger motor size. Summary of the invention

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention provides a motor wire group installation structure, wherein the coil is directly attached to the first end face of the circuit board, and the first wiring plate and the second wiring plate are attached to the second end face of the circuit board. In this way, the wiring structure and the wiring structure are simple and the volume is reduced.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] A disc motor, comprising:

[0007] A stator assembly, comprising a circuit board, a plurality of winding groups and a terminal block assembly, wherein the circuit board has a first end face and a second end face that are opposite to each other; the plurality of winding groups are arranged on the first end face, the winding group comprises a coil, and the coil is attached to the first end face; the coil has a first terminal and a second terminal; the first terminal and the second terminal are both passed through the second end face; the terminal block assembly comprises a first terminal block and a second terminal block, the first terminal block and the second terminal block are both attached to the second end face, the first terminal block is electrically connected to the first terminal; the second terminal block is electrically connected to the second terminal;

[0008] The rotor assembly comprises a rotor and a permanent magnet; the rotor is rotatably connected to the middle part of the circuit board, and the permanent magnet is arranged on the end surface of the rotor opposite to the first end surface.

[0009] Furthermore, the winding groups are provided with three groups, the first wiring tabs are provided with three groups, and the second wiring tab is provided with one group; the three winding groups each include two coils; in the same group of winding groups, the first wiring terminal of one of the coils is passed through the second end surface and is electrically connected to the first wiring tab, the second wiring terminal of one of the coils is electrically connected to the first wiring terminal of another coil, the second wiring terminal of the other coil is passed through the second end surface and is electrically connected to the second wiring tab.

[0010] Furthermore, the contact point between the first terminal and the first wiring piece is a first wiring point; the contact point between the second terminal and the second wiring piece is a second wiring point; and three first wiring points and three second wiring points are evenly spaced around the central axial circumference of the circuit board.

[0011] Furthermore, each of the three first wiring pieces is provided with a first wiring hole, and the first wiring terminal passes through the second end surface and is inserted into the first wiring hole; the first wiring hole forms the first wiring point.

[0012] Furthermore, three second wiring holes are provided on the second wiring sheet; the second wiring terminal passes through the second end surface and is inserted into the second wiring hole; the three first wiring holes and the three second wiring holes are evenly spaced around the central axial circumference of the circuit board.

[0013] Furthermore, a wiring groove is provided on the first end surface, and a first terminal between two coils of the same winding group is guided through the wiring groove to be electrically connected to the second terminal.

[0014] Furthermore, the rotor is a rotor disk, and the permanent magnet includes a plurality of magnet pieces, and the plurality of magnet pieces are distributed in a ring shape on the rotor disk.

[0015] Furthermore, the rotor disk is provided with a plurality of magnet grooves; the plurality of magnet pieces are fitted into the plurality of magnet grooves in a one-to-one correspondence.

[0016] Furthermore, the first connecting piece and the second connecting piece are both copper foil pieces.

[0017] Furthermore, an axial hole is provided in the middle of the circuit board; the rotor is rotatably connected to the axial hole through a bearing assembly.

[0018] In summary, the present invention has the following technical effects:

[0019] 1. The wire ends and tails of the coils are guided out through the first wiring piece and the second wiring piece respectively. Since the first wiring piece and the second wiring piece are both attached to the circuit board, they are attached in a sheet structure and then guided out to the control board of the motor body. The wiring surface is larger and the structure is stable after wiring.

[0020] 2. The coil can be arranged in a circle from the inside to the outside around a center, and then attached to the circuit board. The coils arranged from the inside to the outside can all be attached to the first end surface of the circuit board. The coils are attached in a flat state. The thickness of the winding group added on the first end surface of the circuit board after assembly is only the outer diameter of the coil. The overall thickness of the circuit board will not be too large, so the overall volume is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the disc motor of the present invention;

[0022] Figure 2 is a cross-sectional view of a disc motor of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a stator assembly of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the circuit board and the coil of the present invention;

[0025] Figure 5 is a schematic structural diagram of a first end surface of a circuit board of the present invention;

[0026] Figure 6 is a schematic structural diagram of a second end surface of a circuit board of the present invention;

[0027] Figure 7 is a schematic structural diagram of a rotor assembly of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the rotor disk of the present invention.

[0029] Among them, the meanings of the figure marks are as follows: 10, circuit board; 11, wiring groove; 12, first wiring hole; 13, second wiring hole; 20, coil; 21, first terminal; 22, second terminal; 31, first wiring plate; 311, disc segment; 312, arc segment; 32, second wiring plate; 40, rotor; 41, rotating shaft; 42, bearing bracket; 43, bearing; 44, magnet slot; 50, magnet. DETAILED DESCRIPTION

[0030] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] See also Figure 1-Figure 8 The present invention discloses a disc motor, including a stator assembly and a rotor assembly, wherein the stator assembly includes a circuit board 10, a plurality of winding groups and a terminal assembly, wherein the circuit board 10 is provided with a first end face and a second end face, and the first end face and the second end face are located at two end faces of the circuit board 10 that are away from each other. The plurality of winding groups are arranged on the first end face, wherein the winding group includes a coil 20, and the coil 20 is attached to the first end face, wherein the coil 20 has a first terminal 21 and a second terminal 22; both the first terminal 21 and the second terminal 22 are penetrated to the second end face.

[0034] In addition, the terminal block assembly includes a first terminal block 31 and a second terminal block 32. The first terminal block 31 and the second terminal block 32 are both attached to the second end surface. The first terminal 21 of the coil 20 is passed through the second end surface and electrically connected to the first terminal block 31. The first terminal 21 of the coil 20 is passed through the second end surface and electrically connected to the second terminal block 32.

[0035] The rotor assembly comprises a rotor 40 and a permanent magnet 50 . The rotor 40 is rotatably connected to the middle of the circuit board 10 , and the permanent magnet 50 is disposed on the end surface of the rotor 40 opposite to the first end surface.

[0036] On the basis of the above structure, when the disc motor of the present invention is used, the winding group installation structure is applied to the motor, the circuit board 10 integrates the working circuit of the winding group, and a plurality of winding groups are arranged on the first end surface of the circuit board 10. The coil 20 of the winding group is attached to the first end surface of the circuit board 10, and the first terminal 21 and the second terminal 22 of the coil 20 can be guided and passed through the second end surface, respectively connected to the first terminal piece 31 and the second terminal piece 32, so that the wire head and the wire tail of the coil 20 can be connected on the same end surface of the circuit board 10, so as to prevent the wiring of the coil 20 from winding around inside and causing line confusion.

[0037] The wire ends and tails of the coil 20 are guided out through the first terminal piece 31 and the second terminal piece 32 respectively. Since the first terminal piece 31 and the second terminal piece 32 are both attached to the circuit board 10, they are attached in a sheet structure and then guided out to the control board of the motor body. The wiring surface is larger and the structure is stable after wiring.

[0038] It is worth emphasizing that in this embodiment, the coil 20 can be arranged in a circle from the inside to the outside around a center, and then attached to the circuit board 10. The coils 20 arranged in intervals from the inside to the outside can all be attached to the first end surface of the circuit board 10. The coil 20 is attached in a flat state. After assembly, the thickness of the winding group on the first end surface of the circuit board 10 is only the outer diameter of the coil 20. The overall thickness of the circuit board 10 will not be too large, so the overall volume is relatively small.

[0039] It should be noted that when in use, the coil 20 is energized to generate a magnetic field that acts on the permanent magnet 50 on the rotor 40, driving the rotor 40 to rotate, which can drive the rotating parts connected to the rotor 40 to rotate. The traditional stator core in the prior art plays a magnetic conductive role. After the coil 20 is wound on the stator core, it can guide the magnetic field, thereby forming a relatively stable magnetic field. After being applied to the motor, the torque of the motor is large. In this application, the stator core is cancelled, and the rotation of the rotor 40 is achieved directly through the magnetic field generated by the permanent magnet 50 of the rotor 40 and the coil 20 of the winding group. The torque of the motor is small, but the stator core structure is cancelled, the internal structure of the motor is simplified, the volume of the motor is effectively reduced, and the cost is low.

[0040] In this embodiment, the coil 20 and the circuit board 10 are installed in a flat manner, and the permanent magnet 50 is also arranged relative to and acts on the coil 20 in a flat manner with the rotor 40, so that the circuit board 10, the coil 20, the permanent magnet 50 and the rotor 40 are all overlapped in the axial direction, and the thickness of the overall structure of the motor is reduced.

[0041] In this embodiment, there are three winding groups, which are respectively a first winding group, a second winding group and a third winding group, and three first connecting pieces 31 are provided, and one second connecting piece 32 is provided. Specifically, the three winding groups each include two coils 20, and the three winding groups can be used as three-phase winding groups of a three-phase motor in the prior art.

[0042] In the same winding group, the first terminal 21 of one coil 20 is extended to the second end surface and electrically connected to the first terminal piece 31, the second terminal 22 of one coil 20 is electrically connected to the first terminal 21 of the other coil 20, and the second terminal 22 of the other coil 20 is extended to the second end surface and electrically connected to the second terminal piece 32. That is to say, in the same winding group, only one coil 20 has its first terminal 21 extending into the second end surface through the first end surface, and the second terminal 22 of the other coil 20 extends into the second end surface through the first end surface, and the two coils 20 are electrically connected to each other.

[0043] In this way, two coils 20 are grouped together, and three winding groups are respectively connected to three-phase current, which can generate a rotating magnetic field and provide a stable rotating magnetic field force. Based on this structure, each coil 20 of the three winding groups is flatly attached to the first end surface of the circuit board 10, and is arranged at intervals in the circumferential direction of the first end surface. The two coils 20 of the same winding group can be connected correspondingly. Although multiple coils 20 are distributed in this way, since each coil 20 is attached to the first end surface, the overall thickness of the circuit board 10 will not be increased.

[0044] In addition, the first terminals 21 of the three winding groups connected to the second end face can be connected to different first terminal lugs 31 respectively, and the second terminals 22 of the three winding groups connected to the second end face can be connected to one second terminal lug 32 at the same time. The three first terminal lugs 31 can be connected to three-phase current, and the second terminal lugs 32 are centrally derived. In this way, on the basis of the structure with multiple coils 20, the wiring structure is still guided by the first terminal lugs 31 and the second terminal lugs 32. The ends of the coils 20 only need to be concentrated on the corresponding terminal lugs to prevent wiring confusion.

[0045] Specifically, in this embodiment, the contact point between the first terminal 21 and the first terminal piece 31 is the first connection point, and the contact point between the second terminal 22 and the second terminal piece 32 is the second connection point. In the case where there are three winding groups, the first terminal 21 of the coil 20 of the three winding groups can be connected to the three first terminal pieces 31 to form three first connection points, and the second terminal 22 of the coil 20 of the three winding groups can form three second connection points at the second terminal piece 32. The three first connection points and the three second connection points are evenly spaced around the central axial circumference of the circuit board 10, with the first connection point in the middle being used as the middle access point, and the other two first connection points are located on both sides to distinguish the wire ends of each phase circuit. Different connections are equally distributed on the circuit board 10, so that the same phase difference can be formed after access.

[0046] Specifically, the first wiring holes 12 are provided on the three first wiring pieces 31, and the first wiring terminals 21 of the three different winding groups pass through the second end faces and are inserted into the first wiring holes 12, so that the first wiring holes 12 are formed as first wiring points. After the first wiring terminals 21 are inserted into the first wiring holes 12 in an insertion manner, they are directly electrically connected and are not likely to fall off.

[0047] Of course, a terminal post may be protruded from the first terminal piece 31, and the first terminal 21 may pass through and then be wrapped around the terminal post and then welded to form a first connection point.

[0048] Furthermore, three second wiring holes 13 are provided on the second wiring sheet 32; the second wiring terminal 22 passes through the second end face and is inserted into the second wiring hole 13. The second wiring terminals 22 of three different winding groups pass through the second end face and are inserted into the second wiring hole 13, so that the first wiring hole 12 is formed as a first wiring point. After the first wiring terminal 21 is inserted into the first wiring hole 12 in an insertion manner, it is directly electrically connected and is not easy to fall off.

[0049] On the basis of the structure provided with the first wiring holes 12 and the second wiring holes 13 , the three first wiring holes 12 and the three second wiring holes 13 may be evenly spaced and distributed around the central axial circumference of the circuit board 10 .

[0050] Furthermore, on the basis of the structure with three winding groups, since one winding group includes at least two coils 20, the two coils 20 of a single winding group also need to be connected correspondingly. In order to prevent the line confusion from occurring on the first end surface, a wiring groove 11 may be provided on the first end surface, and the first terminal 21 between the two coils 20 of the same winding group is guided through the wiring groove 11 to be electrically connected to the second terminal 22. The wiring groove 11 may be extended in an arc shape along the circumference of the circuit board 10, so that the coils 20 of the single winding group and the coils 20 can be guided through the wiring groove 11 for routing.

[0051] The first end face of the coil 20 is arranged relative to the rotor 40 , so the coil 20 of the single winding group in this embodiment is routed through the routing groove 11 , which can also prevent the routing structure of the coil 20 from protruding from the first end face and interfering with the rotation of the rotor 40 .

[0052] Furthermore, the rotor 40 in this embodiment is a rotor disk, and the permanent magnet 50 includes a plurality of magnet pieces, which are distributed in a ring shape on the rotor disk, and because the three-phase motor needs to cooperate with the poles of different winding groups to generate a rotating magnetic field, the poles of the two adjacent magnet pieces are set to be different, so that a rotating magnetic field can be formed in cooperation with the three-phase motor. In order to facilitate the assembly of magnet pieces with different poles, an identification structure can also be set at the corresponding position of the magnet slot corresponding to the rotor disk, such as setting different identification patterns or identification texts corresponding to different poles, which can be selected according to actual needs, as long as the magnet piece can be installed corresponding to the pole.

[0053] Specifically, a rotating component, such as a plurality of rotating blades, may be provided on the end surface of the rotor disk away from the magnet 50, so that when the rotor disk rotates, the plurality of rotating blades can guide the plurality of blades to rotate to achieve heat dissipation or air blowing, etc. The rotor disk may also be directly assembled to the component to be rotated.

[0054] Furthermore, in order to improve the assembly stability of the magnet sheets, a plurality of magnet 50 grooves may be further provided on the rotor disk, and a plurality of magnet sheets may be fitted into the plurality of magnet 50 grooves one by one. In this way, the magnet sheets are embedded in the magnet 50 grooves and are not easily separated.

[0055] Of course, the permanent magnet 50 may also be realized by other structures such as annular magnetic steel in the prior art.

[0056] Furthermore, the first terminal plate 31 and the second terminal plate 32 are both copper foils. Copper foil has good electrical conductivity and low resistance, which can reduce power loss.

[0057] Furthermore, the first connecting piece 31 includes a circular segment and an arc segment 312, and the arc segment 312 is connected to the circular segment. In this way, the circular segment can increase the bonding area between the first connecting piece 31 and the circuit board 10, and the arc segment 312 can be adapted to the circumferential structure of the circuit board 10 for bonding, so that the structure of the first connecting piece 31 is more stable after bonding.

[0058] Of course, the first terminal block located in the middle can be between the arc segments of the other two first terminals of the circular segment, so that the middle first terminal point can be set in the circular segment as the middle access point, and the first terminal points on both sides are set on the arc segment, which makes it easier to distinguish when connecting the three-phase circuit.

[0059] Furthermore, an axial hole may be provided in the middle of the circuit board 10, and the rotor 40 may be rotatably connected to the axial hole through a bearing 43 assembly. Specifically, the bearing 43 assembly includes a bearing bracket 42 and a bearing 43, the bearing bracket 42 is inserted into the axial hole of the circuit board, and then the rotor disk is pivotally connected to the bearing bracket 42 through the bearing 43, so that the bearing bracket 42 bears the rotational force of the rotor 40, which is more stable than being directly arranged on the circuit board 10.

[0060] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A disc motor, characterized in that: include, A stator assembly, comprising a circuit board, a plurality of winding groups and a terminal block assembly, wherein the circuit board has a first end face and a second end face that are opposite to each other; the plurality of winding groups are arranged on the first end face, the winding group comprises a coil, and the coil is attached to the first end face; the coil has a first terminal and a second terminal; the first terminal and the second terminal are both passed through the second end face; the terminal block assembly comprises a first terminal block and a second terminal block, the first terminal block and the second terminal block are both attached to the second end face, the first terminal block is electrically connected to the first terminal; the second terminal block is electrically connected to the second terminal; The rotor assembly comprises a rotor and a permanent magnet; the rotor is rotatably connected to the middle part of the circuit board, and the permanent magnet is arranged on the end surface of the rotor opposite to the first end surface.

2. The disc motor according to claim 1, characterized in that: The winding groups are provided with three groups, the first connecting pieces are provided with three groups, and the second connecting piece is provided with one group; the three winding groups all include the coil.

3. The disc motor according to claim 2, characterized in that: In the same winding group, the first terminal of one of the coils is passed through the second end surface and is electrically connected to the first terminal piece, the second terminal of one of the coils is electrically connected to the first terminal of another coil, and the second terminal of the other coil is passed through the second end surface and is electrically connected to the second terminal piece.

4. The disc motor according to claim 2, characterized in that: The contact point between the first terminal and the first wiring piece is a first wiring point; the contact point between the second terminal and the second wiring piece is a second wiring point; three first wiring points and three second wiring points are evenly spaced around the central axial circumference of the circuit board.

5. The disc motor according to claim 4, characterized in that: The three first wiring pieces are each provided with a first wiring hole, the first wiring terminal passes through the second end surface and is inserted into the first wiring hole; the first wiring hole forms the first wiring point.

6. The disc motor according to claim 5, characterized in that: The second wiring sheet is provided with three second wiring holes; the second wiring terminal passes through the second end surface and is inserted into the second wiring hole; the three first wiring holes and the three second wiring holes are evenly spaced around the central axial circumference of the circuit board.

7. The disc motor according to claim 3, characterized in that: A wiring groove is provided on the first end surface, and a first terminal between two coils of the same winding group is guided through the wiring groove to be electrically connected to a second terminal.

8. The disc motor according to claim 2, characterized in that: The rotor is a rotor disk, and the permanent magnet includes a plurality of magnet pieces, which are distributed in a ring shape on the rotor disk.

9. The disc motor according to claim 7, characterized in that: The rotor disk is provided with a plurality of magnet grooves; the plurality of magnet pieces are fitted into the plurality of magnet grooves in a one-to-one correspondence.

10. The disc motor according to any one of claims 1 to 9, characterized in that: An axial hole is arranged in the middle of the circuit board; the rotor is rotatably connected to the axial hole through a bearing assembly.

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