Stator assembly for disc type motor and disc type motor comprising same

Abstract

The utility model provides a stator assembly used for a disc type motor, comprising a first yoke part and a second yoke part, and a plurality of stator coils are axially arranged between the first yoke part and the second yoke part; the stator fixing structure is connected with the first yoke part and the second yoke part in the axial direction; the motor shaft penetrates through a central hole of the stator fixing structure; wherein the stator fixing structure comprises a wire outlet, and the motor shaft comprises a channel which extends in a body of the motor shaft and is provided with an inlet and an outlet, so that outgoing wires from the plurality of stator coils are wired through the wire outlet, the inlet, the channel and the outlet. The utility model further provides a disc type motor which comprises the stator assembly. According to the stator assembly and the disc type motor comprising the stator assembly, a radial wire outgoing mode of the stator winding is adopted, the tightness of a motor structure is effectively improved, the wire outgoing structure of the motor is simplified, and the wire outgoing rationality of the disc type motor is improved.

Description

Technical Field

[0001] The utility model relates to a stator assembly for a disc motor and a disc motor including the same. Background Art

[0002] Motors are widely used in various fields. According to different usage occasions of the motor, the shapes, structures, arrangement manners, etc. of its stator and rotor are also very different.

[0003] For example, a disc motor is an axial flux motor, which has the characteristics of a compact overall structure and is beneficial to improving the power density. It is often used in occasions with high requirements for performance and space utilization, such as electric vehicles and high-end weapons.

[0004] The existing disc motors generally adopt an axial wire outlet method, which makes the internal structure of the motor relatively loose and the overall size relatively large. Some disc motors adopt a radial wire outlet structure, but its structure is relatively complex and the processing and assembly are relatively cumbersome.

[0005] Therefore, how to reasonably design the wire outlet method of the disc motor and simplify the motor structure at the same time is a technical problem that those skilled in the art need to solve at present. Summary of the Utility Model

[0006] In view of the problems and requirements mentioned above, the present disclosure proposes a new technical solution, which solves the above problems and brings other technical effects due to the following technical features.

[0007] The utility model provides a stator assembly for a disc motor, including: a first yoke and a second yoke, a plurality of stator coils are axially located between the first yoke and the second yoke; a stator fixing structure, axially connected to the first yoke and the second yoke; a motor shaft, passing through the central hole of the stator fixing structure; wherein, the stator fixing structure includes a wire outlet, and the motor shaft includes a channel extending in its body and having an inlet and an outlet, so that the wire outlets from the plurality of stator coils are wired through the wire outlet, the inlet, the channel and the outlet.

[0008] Preferably, the first yoke is formed as an annular end plate with a first inner hole, and the second yoke is formed as an annular end plate with a second inner hole. The first outer peripheral edge part of the stator fixing structure is connected to the inner peripheral edge part of the first inner hole, and the second outer peripheral edge part of the stator fixing structure is connected to the inner peripheral edge part of the second inner hole.

[0009] Preferably, the wire outlet is arranged at one of the first outer peripheral edge part and the second outer peripheral edge part of the stator fixing structure and faces the motor shaft.

[0010] Preferably, the stator fixing structure includes a columnar portion for forming the central hole.

[0011] Preferably, a first outer peripheral portion and a second outer peripheral portion of the stator fixing structure are connected by an axial portion.

[0012] Preferably, the stator fixing structure includes a connecting web located between the columnar portion and the axial portion, and a wire outlet fixing structure located between the wire outlet and the inlet is provided on the connecting web.

[0013] Preferably, the wire outlet fixing structure is an arch-shaped structure fixedly connected to the connecting web, or the wire outlet fixing structure is one of a strap, a cable tie, a buckle, and an adhesive member detachably connected to the connecting web.

[0014] Preferably, the first inner hole of the first yoke portion has a plurality of first grooves arranged at circumferential intervals, the first outer peripheral portion of the stator fixing structure has a plurality of first protrusions protruding radially and arranged at circumferential intervals, and the plurality of first protrusions are respectively embedded in the plurality of first grooves.

[0015] Preferably, the second inner hole of the second yoke portion has a plurality of second grooves arranged at circumferential intervals, the second outer peripheral portion of the stator fixing structure has a plurality of second protrusions protruding radially and arranged at circumferential intervals, and the plurality of second protrusions are respectively embedded in the plurality of second grooves.

[0016] Preferably, a first outer peripheral portion and a second outer peripheral portion of the stator fixing structure are connected by an axial portion, so that the axial portion, the plurality of first protrusions, and the plurality of second protrusions form a routing space for the wire outlets of the plurality of stator coils.

[0017] Preferably, the inlet of the motor shaft is arranged adjacent to the central hole, and the outlet is adjacent to the end of the motor shaft.

[0018] Preferably, the channel of the motor shaft includes a first channel portion communicating with the inlet and a second channel portion communicating with the outlet.

[0019] Preferably, the inlet and the outlet are located on the circumferential surface of the motor shaft.

[0020] The present utility model also provides a disc motor, including the stator assembly as described above.

[0021] Therefore, the present utility model provides a stator assembly and a disc motor including the same, which adopt a radial wire outlet mode of the stator winding, effectively improve the compactness of the motor structure, simplify the wire outlet structure of the motor, and improve the wire outlet rationality of the disc motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. shows a schematic diagram of a stator assembly for a disc motor according to a preferred embodiment of the present utility model.

[0023] Figure 2 FIG. shows a schematic diagram of a first yoke and a second yoke according to a preferred embodiment of the present utility model.

[0024] Figure 3 FIG. shows a schematic diagram of a stator fixing structure according to a preferred embodiment of the present utility model.

[0025] Figure 4 FIG. shows a cross-sectional view of a motor shaft and an assembled stator assembly according to a preferred embodiment of the present utility model.

[0026] Figure 5 FIG. shows a partial cross-sectional view of a stator assembly according to a preferred embodiment of the present utility model.

[0027] Figure 6 FIG. shows a schematic diagram of an outgoing line fixing structure according to another preferred embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions, and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present disclosure. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those skilled in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0029] Compared with the embodiments shown in the drawings, the feasible implementation solutions within the scope of protection of the present disclosure may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components connected differently, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0030] Unless otherwise defined, technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which this disclosure pertains. The terms "first", "second" and similar words used in the specification and claims of this patent application of the disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components may be one or more; similarly, words such as "a", "the", "said" and the like do not necessarily denote a quantity limitation. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "installed", "set", "connected" or "coupled" are not limited to physical or mechanical installation, setting, connection, but may include electrical installation, setting, connection, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent the relative orientation relationship during the use of the device or the orientation relationship shown in the drawings. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0031] The principle and structure according to the present utility model will be introduced below with reference to the accompanying drawings.

[0032] Figure 1 A schematic diagram of a stator assembly 1 for a disc motor according to a preferred embodiment of the present utility model is shown. It should be understood that herein, "axial direction" refers to the direction in which the axis of the motor shaft 7 extends, "radial direction" refers to the direction perpendicular to the axial direction, and "circumferential direction" refers to the direction in which the rotor of the motor rotates around the motor shaft 7.

[0033] See further Figure 1-5 , in this preferred embodiment, the stator assembly 1 for a disc motor includes: a first yoke portion 10, a second yoke portion 20, a stator fixing structure 3, and a motor shaft 7.

[0034] Specifically, a plurality of stator windings 61 are axially located between the first yoke portion 10 and the second yoke portion 20. Generally, the winding of the stator winding 61 will be wound around a skeleton 6 (as Figure 5 shown) to form a winding unit, and then the skeleton wound with the winding is sleeved on a stator core 19 (which is generally formed in a toothed block shape). More preferably, the stator core 19 can be integrally formed with the first yoke portion 10 by integrally die-casting using SMC (Soft Magnetic Composites). The wires from each stator winding 61 will be combined and then led out.

[0035] The stator fixing structure 3 is axially connected to the first yoke portion 10 and the second yoke portion 20, so as to fix the first yoke portion 10, the second yoke portion 2, and the stator winding 61 therebetween.

[0036] The motor shaft 7 passes through the central hole 30 of the stator fixing structure 3. For example, the motor shaft 7 can be assembled in the central hole of the stator fixing structure 3 by interference fit. Of course, splines, threads or any other suitable fixing means can also be adopted.

[0037] Furthermore, the stator fixing structure 3 further includes an outgoing line port 33 (as Figure 3 shown), and the motor shaft 7 includes a channel 70 extending in its body and having an inlet 71 and an outlet 72 (as Figure 4 shown), such that the outgoing lines 62 from the plurality of stator windings 61 are routed through the outgoing line port 33, the inlet 71, the channel 70 and the outlet 72.

[0038] Thus, the present utility model provides a structure for radial outgoing lines, that is, the winding outgoing lines are led out radially from the first and second yoke portions, pass through the outgoing line port on the stator fixing structure radially, then continue to enter the channel in the motor shaft, and finally are led out from an appropriate part of the motor shaft (usually near the end of the motor shaft) of the stator assembly. This structure of the present utility model can effectively reduce the space inside and axially occupied by the outgoing lines of the disc motor, making the internal structure of the motor more compact. The disc motor adopting this radial outgoing line manner conforms to the winding direction of the windings, thus avoiding large-angle corners in the path of the outgoing lines. Moreover, the structure of the present utility model is simple, easy to process and assemble, and can also avoid punching holes in the motor body or casing, improving the integrity of the motor, effectively improving the sealing performance of the motor while ensuring the beautiful appearance of the motor.

[0039] Preferably, as Figure 2 shown, the first yoke portion 10 can be formed as an annular end plate having a first inner hole 18, and the second yoke portion 20 can be formed as an annular end plate having a second inner hole 28. Further combined with Figure 5 shown, the first outer peripheral edge portion 38 of the stator fixing structure 3 can be connected to the inner peripheral edge portion of the first inner hole 18, and the second outer peripheral edge portion 39 of the stator fixing structure 3 can be connected to the inner peripheral edge portion of the second inner hole 28. The stator fixing structure 3 can be connected to the first yoke portion 10 and the second yoke portion 20 by any suitable means, such as by bolts, snaps, riveting, etc.

[0040] Further preferably, the outgoing line port 33 can be provided at one of the first outer peripheral edge portion 38 and the second outer peripheral edge portion 39 of the stator fixing structure 3 and face the motor shaft 7 (as Figure 3 and 4 shown). In the shown preferred embodiment, the outgoing line port 33 is provided at the first outer peripheral edge portion of the stator fixing structure 3 for connecting the first yoke portion 10.

[0041] Preferably, as Figure 3 and5 As shown, the stator fixing structure 3 may include a columnar portion 301 for forming a central hole 30. This columnar portion 301 generally has a certain thickness to increase its strength. Further preferably, the inlet 71 of the motor shaft 7 may be arranged adjacent to the central hole 30 (or adjacent to the columnar portion 301), and the outlet 72 is adjacent to the end of the motor shaft 7. This setting further shortens the traveling distance of the outgoing wire 62 of the stator winding 61 and provides an optimized routing path.

[0042] Preferably, as Figure 3 and 5 shown, the first outer peripheral edge portion 38 and the second outer peripheral edge portion 39 of the stator fixing structure 3 may be connected by an axial portion 37. Furthermore, the stator fixing structure 3 may include a connecting web 35 located between the columnar portion 301 and the axial portion 37 (which generally may have a smaller thickness to reduce weight), and an outgoing wire fixing structure 36 located between the outgoing wire opening 33 and the inlet 71 may be provided on the connecting web 35. In some larger-sized disc motors, after the outgoing wire 62 of the stator winding 61 is led out from the outgoing wire opening 33, it still needs to pass through a certain distance to reach the inlet 71 on the motor shaft 7. By adding the outgoing wire fixing structure 36 in this section of the distance, the outgoing wire 62 can be better guided and positioned to ensure the compliance and coherence of the wire routing. It should be understood that the outgoing wire fixing structure 36 may be located at any appropriate position between the outgoing wire opening 33 and the inlet 71.

[0043] Further preferably, the outgoing wire fixing structure 36 is an arch-shaped structure fixedly connected to the connecting web 35, as Figure 3 shown. For example, the arch-shaped outgoing wire fixing structure 36 can be fixedly connected to the connecting web 35 by welding, riveting, buckling, bonding, etc. Additionally, if the position of the outgoing wire fixing structure 36 is close to the outgoing wire opening 33 or the columnar portion 301 of the central hole 30, threaded holes may be reserved on the stator fixing structure 3 and screws can be used to fix the outgoing wire fixing structure 36 to the stator fixing structure 3.

[0044] Alternatively, the outgoing wire fixing structure 36 is one of a tie strap, a cable tie, a buckle, and an adhesive component detachably connected to the connecting web 35 (in another preferred embodiment as Figure 6 shown, the outgoing wire fixing structure 36 is in the form of a tie strap or a cable tie). Furthermore, the connecting web 35 may have some through holes, for example, and the outgoing wire fixing structure 36 of the tie strap, cable tie, or buckle type can be arranged on the part between these through holes.

[0045] Preferably, referring to Figure 2 、 3, 5. The first inner hole 18 of the first yoke portion 10 may have a plurality of first grooves 11 arranged at circumferential intervals. The first outer peripheral edge portion 38 of the stator fixing structure 3 has a plurality of first bosses 31 protruding radially and arranged at circumferential intervals, and the plurality of first bosses 31 may be respectively embedded in the plurality of first grooves 11.

[0046] Further preferably, referring to Figure 2 , 3 , 5. The second inner hole 28 of the second yoke portion 20 has a plurality of second grooves 22 arranged at circumferential intervals. The second outer peripheral edge portion 39 of the stator fixing structure 3 has a plurality of second bosses 32 protruding radially and arranged at circumferential intervals, and the plurality of second bosses 32 may be respectively embedded in the plurality of second grooves 22.

[0047] By providing such a boss-groove mating structure between the first yoke portion 10 / second yoke portion 20 and the stator fixing structure 3, during the assembly process of the stator assembly 1, it can provide temporary positioning and circumferential limiting functions for the assembly between the first yoke portion 10 / second yoke portion 20 and the stator fixing structure 3, preventing them from rotating unnecessarily during the assembly process of the stator assembly 1.

[0048] Furthermore, bolt holes can be provided on the protruding portions between the plurality of first grooves 11 of the first yoke portion 10, and bolt holes can be provided on the protruding portions between the plurality of second grooves 22 of the second yoke portion 20. Correspondingly, columnar bolt holes can be provided between the plurality of first bosses 31 and between the plurality of second bosses 32 of the stator fixing structure 3. Thus, bolts passing through the corresponding bolt holes on the first yoke portion 10, the second yoke portion 20, and the stator fixing structure 3 can fix the three together.

[0049] Further preferably, as described above, since the first outer peripheral edge portion 38 and the second outer peripheral edge portion 39 of the stator fixing structure 3 are connected by the axial portion 37, the axial portion 37, the plurality of first bosses 31, and the plurality of second bosses 32 can form a routing space 34 for the outgoing wires 62 of the plurality of stator windings 61, as Figure 3 and Figure 5 shown. By providing such a routing space 34, it can ensure that the outgoing wires 62 from the plurality of stator windings 61 have sufficient space for routing and parallel connection, and are led out from the wire outlet 33 after parallel connection.

[0050] Preferably, the channel 70 of the motor shaft 7 may include a first channel portion 701 that communicates with the inlet 71 and extends substantially radially, and a second channel portion 702 that communicates with the outlet 72 and extends substantially axially. It should be understood that due to limitations such as the structure of the shaft itself, the machining tool, and the machining space, those skilled in the art can understand that the first channel portion 701 does not strictly extend along the radial direction, but may be slightly inclined relative to the radial direction; similarly, the second channel portion 702 does not strictly extend along the axial direction, but may be slightly inclined relative to the axial direction. Therefore, although the term "substantially" is used herein, it is not a vague or unclear term, and those skilled in the art can accurately understand its technical meaning after reading the above content. Furthermore, the inlet 71 and the outlet 72 may be located on the circumferential surface of the motor shaft 7.

[0051] In addition, the present utility model further provides a disc motor, which includes the stator assembly as described above.

[0052] In summary, the present utility model provides a stator assembly and a disc motor including the same, which adopt a radial wire outlet mode of the stator winding, effectively improve the compactness of the motor structure, simplify the wire outlet structure of the motor, and improve the wire outlet rationality of the disc motor.

[0053] In the foregoing, the exemplary embodiments of the present disclosure have been described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that without departing from the concept of the present disclosure, various modifications and variations can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present disclosure can be made without exceeding the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A stator assembly (1) for a disc motor, characterized in that: include: A first yoke (10) and a second yoke (20), wherein a plurality of stator coils (61) are axially located between the first yoke (10) and the second yoke (20); A stator fixing structure (3) connected to the first yoke (10) and the second yoke (20) along the axial direction; A motor shaft (7) passes through a central hole (30) in the stator fixing structure (3); The stator fixing structure (3) includes a wire outlet (33), and the motor shaft (7) includes a channel (70) extending in its body and having an inlet (71) and an outlet (72), so that the outgoing wires (62) from the plurality of stator coils (61) are wired via the wire outlet (33), the inlet (71), the channel (70) and the outlet (72).

2. The stator assembly (1) according to claim 1, characterized in that: The first yoke (10) is formed as an annular end plate having a first inner hole (18), and the second yoke (20) is formed as an annular end plate having a second inner hole (28), the first outer peripheral edge portion (38) of the stator fixing structure (3) is connected to the inner peripheral edge portion of the first inner hole (18), and the second outer peripheral edge portion (39) of the stator fixing structure (3) is connected to the inner peripheral edge portion of the second inner hole (28).

3. The stator assembly (1) according to claim 2, characterized in that: The wire outlet (33) is arranged at one of a first peripheral edge portion (38) and a second peripheral edge portion (39) of the stator fixing structure (3) and faces the motor shaft (7).

4. The stator assembly (1) according to claim 3, characterized in that: The stator fixing structure (3) comprises a columnar portion (301) for forming the central hole (30).

5. The stator assembly (1) according to claim 4, characterized in that: The first outer peripheral edge portion (38) and the second outer peripheral edge portion (39) of the stator fixing structure (3) are connected via an axial portion (37).

6. The stator assembly (1) according to claim 5, characterized in that: The stator fixing structure (3) comprises a connecting web (35) located between the columnar portion (301) and the axial portion (37), and an outlet fixing structure (36) located between the outlet port (33) and the inlet port (71) is arranged on the connecting web (35).

7. The stator assembly (1) according to claim 6, characterized in that: The outgoing wire fixing structure (36) is an arch-shaped structure fixedly connected to the connecting web (35), or the outgoing wire fixing structure (36) is one of a binding strap, a cable tie, a buckle, and an adhesive component detachably connected to the connecting web (35).

8. The stator assembly (1) according to claim 2, characterized in that: The first inner hole (18) of the first yoke (10) has a plurality of first grooves (11) arranged at intervals in the circumferential direction, and the first outer peripheral edge portion (38) of the stator fixing structure (3) has a plurality of first bosses (31) protruding in the radial direction and arranged at intervals in the circumferential direction, and the plurality of first bosses (31) are respectively embedded in the plurality of first grooves (11).

9. The stator assembly (1) according to claim 8, characterized in that: The second inner hole (28) of the second yoke (20) has a plurality of second grooves (22) arranged at intervals along the circumferential direction, and the second outer peripheral edge portion (39) of the stator fixing structure (3) has a plurality of second bosses (32) protruding radially and arranged at intervals along the circumferential direction, and the plurality of second bosses (32) are respectively embedded in the plurality of second grooves (22).

10. The stator assembly (1) according to claim 9, characterized in that: The first peripheral edge portion (38) and the second peripheral edge portion (39) of the stator fixing structure (3) are connected via an axial portion (37), so that the axial portion (37), the plurality of first bosses (31) and the plurality of second bosses (32) form a routing space (34) for the output wires (62) of the plurality of stator coils (61).

11. The stator assembly (1) according to any one of claims 1 to 10, characterized in that: The inlet (71) of the motor shaft (7) is arranged adjacent to the central hole (30), and the outlet (72) is adjacent to the end of the motor shaft (7).

12. The stator assembly (1) according to claim 11, characterized in that: The channel (70) of the motor shaft (7) comprises a first channel portion (701) communicating with the inlet (71) and a second channel portion (702) communicating with the outlet (72).

13. The stator assembly (1) according to claim 12, characterized in that: The inlet (71) and the outlet (72) are located on the circumferential surface of the motor shaft (7).

14. A disc motor, characterized in that: It comprises a stator assembly (1) as claimed in any one of claims 1 to 13.

Images