Stator core, stator unit and axial flux motor

Abstract

The utility model relates to the technical field of axial magnetic flux motors, in particular to a stator core, a stator unit and an axial magnetic flux motor, and aims to solve the problems that the conventional stator core is difficult to fix in the assembly process and is not beneficial to assembly. The stator iron core provided by the utility model comprises an iron core body and an iron core shell, wherein the iron core body is inserted into the iron core shell; a positioning hole is formed in the iron core shell, and the coil winding is wound around the iron core shell. According to the stator iron core provided by the utility model, the iron core shell is wrapped outside the iron core body, and positioning is carried out through the positioning holes in the iron core shell, so that the problem that the stator iron core cannot be fixed by clamping of the iron core body and the positioning grooves due to insufficient depth of the positioning grooves, and assembly is affected is solved. A layer of iron core shell is sleeved on the outer side of an original stator iron core, the iron core shell and the original stator iron core are integrated through winding of a coil winding, protrusions are arranged on a stator shell or other parts to be matched with positioning holes to achieve positioning, and deflection in the assembling process is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flux motors, in particular to a stator core, a stator unit and an axial flux motor. Background Art

[0002] When assembling the stator winding of the existing axial flux motor, although there are positioning grooves to limit the stator core, due to structural limitations, the depth of the positioning grooves is relatively shallow, making it difficult to ensure that the stator winding remains stably in a vertical state. When the gland is finally assembled, the positioning grooves on the gland are difficult to align with the stator core, which greatly increases the difficulty of assembly and affects the assembly efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a stator core, a stator unit and an axial flux motor, so as to solve the problem that the existing stator core is difficult to fix during the assembly process, which is not conducive to assembly.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0005] A stator core comprises a core body and a core shell, wherein the core body is inserted into the core shell;

[0006] A positioning hole is provided on the iron core shell, and the coil winding is wound around the iron core shell.

[0007] Furthermore, both upper and lower ends of the core body are provided with flanges, and both upper and lower ends of the core shell are in contact with the flanges.

[0008] Furthermore, the core shell includes a first half shell and a second half shell, and the first half shell and the second half shell are symmetrical in structure and symmetrically arranged.

[0009] Furthermore, the core shell is made of non-ferromagnetic material.

[0010] Another aspect of the present invention provides a stator unit, comprising a stator winding and a first positioning bracket; the stator winding comprises the above-mentioned stator core, and further comprises a coil winding, wherein the coil winding is wound around the stator core;

[0011] The first positioning bracket is provided with a first positioning protrusion, which is inserted into the positioning hole. A plurality of stator windings are mounted on one first positioning bracket.

[0012] Furthermore, the stator unit further includes a second positioning bracket;

[0013] The second positioning bracket is provided with a second positioning protrusion, the second positioning protrusion is inserted into the positioning hole, and a plurality of stator windings are installed on one second positioning bracket;

[0014] At least two positioning holes are provided on the core shell.

[0015] Furthermore, a plurality of the first positioning brackets are spliced into a first positioning ring, a plurality of the second positioning brackets are spliced into a second positioning ring, and the second positioning ring is sleeved on the first positioning ring.

[0016] Furthermore, the first positioning bracket and the second positioning bracket are both made of non-ferromagnetic materials.

[0017] Furthermore, the stator unit further comprises a stator housing, wherein the stator housing comprises an upper positioning cover plate, an inner ring, an outer ring and a lower positioning cover plate;

[0018] The upper positioning cover plate and the lower positioning cover plate are both provided with radially extending ribs, and positioning grooves are provided between adjacent ribs, and the upper and lower ends of the stator core are both clamped in the positioning grooves;

[0019] The inner ring, the outer ring and the lower positioning cover are integrally formed, or the inner ring and the outer ring are divided into two sections along a plane perpendicular to the axis and are integrally formed with the upper positioning cover and the lower positioning cover respectively.

[0020] A third aspect of the present invention provides an axial flux motor, comprising the above-mentioned stator unit.

[0021] Based on the above technical solutions, the technical effects achieved by the present invention are:

[0022] The stator core provided by the utility model comprises an iron core body and an iron core shell. The iron core body is inserted into the iron core shell. A positioning hole is provided on the iron core shell, and a coil winding is wound around the iron core shell.

[0023] The stator core provided by the present invention is positioned by wrapping a core shell around the core body and positioning it through positioning holes in the core shell. This avoids the problem of insufficient engagement between the core body and the positioning slots due to insufficient positioning slot depth, which can hinder assembly. Specifically, a core shell is placed over the outer surface of the existing stator core, and the coil windings are wound around it, integrating the two. The core shell is made of a non-ferromagnetic material to avoid affecting the magnetic field. Accordingly, protrusions can be provided on the stator housing or other components to cooperate with the positioning holes to achieve positioning of the stator core, preventing it from deflecting during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural diagram of the assembly of the core housing, the first positioning bracket and the second positioning bracket;

[0026] Figure 2 It is a structural diagram of the core shell;

[0027] Figure 3 Schematic diagram of the structure of the first half shell;

[0028] Figure 4 It is a structural diagram of the core body;

[0029] Figure 5 is a structural schematic diagram of a first positioning bracket;

[0030] Figure 6 is a structural schematic diagram of a second positioning bracket;

[0031] Figure 7 This is a structural diagram of the first positioning ring and the second positioning ring in an assembled state;

[0032] Figure 8 Schematic diagram of the structure of the stator housing;

[0033] Figure 9 Schematic diagram of the upper positioning cover structure;

[0034] Figure 10 It is a structural diagram of the lower positioning cover plate, inner ring and outer ring;

[0035] Figure 11 Schematic diagram of the structure of the sealing gasket.

[0036] Icons: 200, first positioning ring; 300, second positioning ring; 111, core body; 112, core shell; 101, first half shell; 102, second half shell; 11, positioning hole; 12, flange; 13, rib; 210, first positioning bracket; 211, first positioning protrusion; 310, second positioning bracket; 311, second positioning protrusion; 410, upper positioning cover; 420, inner ring; 430, outer ring; 440, lower positioning cover; 411, rib plate; 412, positioning groove; 413, connecting plate; 414, sealing groove. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0039] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0040] When assembling the stator windings in existing axial flux motors, the stator windings are positioned using positioning slots on the stator housing, located at the upper and lower ends. During assembly, the stator windings are first placed in the lower positioning slots. However, these lower positioning slots do not effectively position the stator core to maintain its vertical position, making it difficult to align the stator core with the upper positioning slots, affecting assembly efficiency.

[0041] In view of this, the present invention provides a stator core, including a core body 111 and a core shell 112 , wherein the core body 111 is inserted into the core shell 112 ; a positioning hole 11 is provided on the core shell 112 , and a coil winding is wound around the core shell 112 .

[0042] The stator core provided by the present invention is positioned by wrapping a core housing 112 around the core body 111 and positioning it through positioning holes 11 in the core housing 112. This avoids the problem of insufficient engagement between the core body 111 and the positioning slots 412 due to insufficient depth of the positioning slots 412, which in turn affects assembly. Specifically, a core housing 112 is sheathed over the existing stator core and the coil windings are wound around it, integrating the two. The core housing 112 is made of a non-ferromagnetic material to avoid affecting the magnetic field. Accordingly, protrusions can be provided on the stator housing or other components to cooperate with the positioning holes 11 to achieve positioning of the stator core and prevent it from deflecting during assembly.

[0043] The following combination Figures 1-11 The structure and shape of the stator unit provided in this embodiment are described in detail:

[0044] The stator unit provided in this embodiment includes a stator winding, a first positioning ring 200, a second positioning ring 300, and a stator housing. Specifically, the stator housing includes an upper positioning cover plate 410, an inner ring 420, an outer ring 430, and a lower positioning cover plate 440. The upper positioning cover plate 410 and the lower positioning cover plate 440 are both provided with ribs 411 that are uniformly distributed around the axis and extend radially. Positioning grooves 412 are provided between adjacent ribs 411. Figure 9 、 Figure 10 As shown, the upper and lower ends of the stator winding are both engaged with the positioning groove 412. A plurality of stator windings are evenly distributed in the stator housing in an annular shape around the axis of the stator housing and connected to the first positioning ring 200 and the second positioning ring 300.

[0045] Specifically, the stator winding includes a stator core and a coil winding. The stator core includes a core body 111 and a core shell 112. The core body 111 is inserted into the core shell 112. A positioning hole 11 is provided on the core shell 112 for connecting with the first positioning ring 200 and the second positioning ring 300. Figure 2 The coil winding is wound around the core housing 112 .

[0046] In this embodiment, in order to ensure that the core shell 112 is reliably connected to the core body 111, flanges 12 are provided at both the upper and lower ends of the core body 111. Figure 4 As shown, the upper and lower ends of the core shell 112 are located between the two flanges 12 and abut against the flanges 12 .

[0047] To facilitate connection between the core housing 112 and the core body 111, the core housing 112 comprises a first half-shell 101 and a second half-shell 102. The first and second half-shells 101, 102 are symmetrically arranged and assembled in a spliced manner. Assembly is accomplished by simply snapping the first and second half-shells 101, 102 onto the core body 111. Conductive wire is then wound around the core housing 112 to form a coil winding, which integrates the first and second half-shells 101, 102.

[0048] It should be noted that the core body 111 is the stator core in the prior art.

[0049] In this embodiment, the first half shell 101 is provided with a connecting ear, and a positioning hole 11 is opened on the connecting ear. Along the radial direction of the stator shell, the first half shell 101 is provided with two ribs 13 for cooperating with the flange 12 to ensure a reliable connection between the core shell 112 and the core body 111 to prevent relative movement between the two. Figure 3 Specifically, the flange 12 is used to prevent the stator housing from moving relative to the axial direction, and the rib 13 is used to prevent the stator housing from moving relative to the radial direction.

[0050] In this embodiment, six positioning holes 11 are provided on the core shell 112, two of which cooperate with the first positioning ring 200, and the remaining positioning holes 11 cooperate with the second positioning ring 300. Specifically, the positioning holes 11 that cooperate with the first positioning ring 200 are formed by splicing the first half shell 101 and the second half shell 102. Figure 2 、 Figure 3 As shown, the two positioning holes 11 are arranged along the axial direction of the stator housing; the positioning holes cooperating with the second positioning ring 300 are respectively opened in the first half shell 101 and the second half shell 102, and the first half shell 101 and the second half shell 102 are each provided with two positioning holes 11 arranged along the axial direction of the stator housing.

[0051] In this embodiment, in order to prevent the core housing 112 from affecting the magnetic field, the core housing 112 is made of non-ferromagnetic materials, such as PEEK, engineering plastics, aluminum alloy, etc.

[0052] In this embodiment, the second positioning ring 300 is sleeved on the first positioning ring 200 and is coaxial with the motor output shaft. Specifically, the first positioning ring 200 includes a first positioning bracket 210, and the second positioning ring 300 includes a second positioning bracket 310. The first positioning bracket 210 and the second positioning bracket 310 are both made of non-ferromagnetic materials, which can be the same as the core shell 112. Multiple first positioning brackets 210 are spliced to form the first positioning ring 200, and multiple second positioning brackets 310 are spliced to form the second positioning ring 300. Figure 7 shown.

[0053] Specifically, such as Figure 5 As shown, the first positioning bracket 210 is configured as a section of a circular ring, and a plurality of first positioning protrusions 211 are provided along the circumference. The first positioning protrusions 211 are inserted into the positioning holes 11 to form a shaft-hole fit, which can increase the stability of the connection. That is, multiple stator windings are installed on one first positioning bracket 210. Similarly, Figure 6 As shown, the second positioning bracket 310 is configured as a section of a circular ring, and is provided with a plurality of second positioning protrusions 311 along the circumference, and the second positioning protrusions 311 are inserted into the positioning holes 11. That is, a plurality of stator windings are mounted on one second positioning bracket 310.

[0054] In this embodiment, the first positioning protrusions 211 are arranged at intervals; two second positioning protrusions 311 form a group, and each group of second positioning protrusions 311 is arranged at intervals, thereby leaving gaps for the cooling medium to pass through.

[0055] In this embodiment, the core shell 112 is coordinated with the first positioning bracket 210 and the second positioning bracket 310, that is, the first positioning protrusion 211, the second positioning protrusion 311 and the axial hole of the positioning hole 11 are coordinated to form the three into a whole to obtain good stability, thereby ensuring stability during the assembly process by cooperating with multiple positioning grooves 412, which is conducive to alignment with the positioning grooves 412 and facilitates the installation of the upper positioning cover 410.

[0056] In an optional solution of this embodiment, a first positioning bracket 210, a second positioning bracket 310 and a corresponding number of core shells 112 can be set as a set of limiting mechanisms, such as Figure 1 As shown, the limiting mechanisms are mutually limited by splicing positioning brackets to form a ring, thereby ensuring the position and vertical state of the core housing 112.

[0057] Furthermore, to improve integrity, the first positioning brackets 210 and the second positioning brackets 310 can be staggered. Specifically, the core housings 112 mounted on the first positioning brackets 210 are divided into two groups, each connected to two adjacent second positioning brackets 310. Similarly, the core housings 112 mounted on the second positioning brackets 310 are divided into two groups, each connected to two adjacent first positioning brackets 210. This alternating connection allows the first positioning ring 200, core housing 112, and second positioning ring 300 to form a single unit, resulting in improved integrity and stability compared to a spliced system.

[0058] Specifically, the number of first positioning brackets 210 comprising the first positioning ring 200 is equal to the number of second positioning brackets comprising the second positioning ring 300. The cross-sections of the two positioning brackets are along the radial direction of the positioning ring and pass through the center. The seams of the first positioning brackets 310 and the second positioning brackets can be collinear or non-collinear.

[0059] In this embodiment, the upper and lower ends of the core body 111, namely the flanges 12, are inserted into and engage with the positioning slots 412. The upper and lower ends of the core housing 112 are positioned between the upper positioning cover plate 410 and the lower positioning cover plate 440. The first and second positioning rings 200 and 300 are positioned between the ribs 411 of the upper and lower positioning cover plates 410 and 440 to prevent interference. It should be noted that the vertical direction herein is defined along the axis of the stator housing after assembly.

[0060] In this embodiment, Figure 1As shown, two first locating rings 200 and two second locating rings 300 are provided to enhance integrity and stability. The first protrusions on the two first locating rings 200 are inserted into the locating holes 11 in a direction away from each other, and the first protrusions on the two second locating rings 300 are inserted into the locating holes 11 in a direction away from each other. That is, the first and second locating rings 200 and 300 located below abut against the core housing 112. To ensure a secure connection between the first and second locating rings 200 and 300 located above and the core housing 112, the first and second locating protrusions 211 and 311 employ a transition fit or interference fit with the locating holes 11.

[0061] In an optional solution of this embodiment, the inner ring 420, the outer ring 430 and the lower positioning cover 440 are integrally formed, the stator housing further includes an annular sealing gasket, the upper positioning cover 410 is provided with a sealing groove 414, the sealing gasket is clamped in the sealing groove 414 and abuts against the inner ring 420 and the outer ring 430 to form a seal, and the upper positioning cover 410 is connected to the outer ring 430 and the inner ring 420 by screws. Figure 9 、 Figure 11 As shown, two sealing grooves 414 are provided on the upper positioning cover plate 410 to correspond to two sealing gaskets, which are respectively used to seal with the inner ring 420 and the outer ring 430. The sealing gasket in the figure is the sealing gasket used for the outer ring 430. The two sealing gaskets have the same structure but different sizes.

[0062] In an alternative solution to this embodiment, the inner ring 420 and the outer ring 430 can be divided into two sections along a plane perpendicular to their axes and integrally formed with the upper positioning cover plate 410 and the lower positioning cover plate 440, respectively. That is, the stator housing is divided into two parts, with the dividing surface provided at the inner ring 420 and the outer ring 430.

[0063] In this embodiment, the upper positioning cover plate 410 is further provided with connecting plates 413, which are used to connect adjacent ribs 411 to enhance their strength. Multiple connecting plates 413 are arranged around the axis of the stator housing to form a ring. The lower positioning cover plate 440 has a similar structure to the upper positioning cover plate 410, equipped with positioning grooves 412 and ribs 411. The ends of the ribs 411 are respectively connected to the inner ring 420 and outer ring 430 to enhance strength.

[0064] In this embodiment, the outer ring 430, the upper positioning cover plate 410, the lower positioning cover plate 440, and the stator windings form a first annular flow channel; the inner ring 420, the upper positioning cover plate 410, the lower positioning cover plate 440, and the stator windings form a second annular flow channel; and the adjacent stator windings and the upper positioning cover plate 410 and the lower positioning cover plate 440 form a radial flow channel. One end of the radial flow channel is connected to the first flow channel, and the other end is connected to the second flow channel, thereby forming a cooling channel for the cold zone of the stator unit. Specifically, an inlet and an outlet are opened on the outer ring 430 to communicate with the first flow channel. The cooling medium enters and exits through the inlet and outlet, and passes through the cooling channel to remove heat.

[0065] When assembling the stator unit provided in this embodiment, the stator winding, the first positioning bracket 210, and the second positioning bracket 310 can be assembled and placed in and engaged with the positioning groove 412 of the lower positioning cover 440; or it can be installed in steps, that is, the stator winding is first assembled with the first positioning bracket 210 and the second positioning bracket 310 at the bottom and then placed in, and then the first positioning bracket 210 and the second positioning bracket 310 at the top are assembled.

[0066] Based on the stator unit provided in this embodiment, an axial flux motor is proposed, including the above-mentioned stator unit.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stator core, characterized in that: It comprises an iron core body (111) and an iron core shell (112), wherein the iron core body (111) is inserted into the iron core shell (112); A positioning hole (11) is provided on the iron core shell (112), and the coil winding is wound around the iron core shell (112).

2. The stator core according to claim 1, characterized in that Both upper and lower ends of the core body (111) are provided with flanges (12), and both upper and lower ends of the core shell (112) are in contact with the flanges (12).

3. The stator core according to claim 2, characterized in that The core housing (112) comprises a first half shell (101) and a second half shell (102), wherein the first half shell (101) and the second half shell (102) are symmetrical in structure and are symmetrically arranged.

4. The stator core according to claim 1, characterized in that The core shell (112) is made of non-ferromagnetic material.

5. A stator unit, characterized in that: It comprises a stator winding and a first positioning bracket (210); the stator winding comprises the stator core according to any one of claims 1 to 4, and further comprises a coil winding, wherein the coil winding is wound around the stator core; The first positioning bracket (210) is provided with a first positioning protrusion (211), the first positioning protrusion (211) is inserted into the positioning hole (11), and a plurality of stator windings are mounted on one first positioning bracket (210).

6. The stator unit according to claim 5, characterized in that Also included is a second positioning bracket (310); A second positioning protrusion (311) is provided on the second positioning bracket (310), and the second positioning protrusion (311) is inserted into the positioning hole (11). A plurality of stator windings are installed on one second positioning bracket (310); At least two positioning holes (11) are provided on the core shell (112).

7. The stator unit according to claim 6, characterized in that A plurality of the first positioning brackets (210) are spliced into a first positioning ring (200), a plurality of the second positioning brackets (310) are spliced into a second positioning ring (300), and the second positioning ring (300) is sleeved on the first positioning ring (200).

8. The stator unit according to claim 7, characterized in that The first positioning bracket (210) and the second positioning bracket (310) are both made of non-ferromagnetic materials.

9. The stator unit according to claim 8, characterized in that Also included is a stator housing, the stator housing including an upper positioning cover plate (410), an inner ring (420), an outer ring (430) and a lower positioning cover plate (440); The upper positioning cover plate (410) and the lower positioning cover plate (440) are both provided with radially extending ribs (411), positioning grooves (412) are provided between adjacent ribs (411), and the upper and lower ends of the stator core are both clamped in the positioning grooves (412); The inner ring (420), the outer ring (430) and the lower positioning cover plate (440) are integrally formed, or the inner ring (420) and the outer ring (430) are divided into two sections along a plane perpendicular to the axis and are respectively integrally formed with the upper positioning cover plate (410) and the lower positioning cover plate (440).

10. An axial flux motor, characterized in that: The invention comprises a stator unit according to any one of claims 5 to 9.

Images