A stator assembly based on a disc motor

Abstract

The present invention discloses a stator assembly based on a disc motor, comprising: a radial rib yoke plate, which is composed of a circular yoke portion in the inner circle and a plurality of radial rib portions extending outward from the circular yoke portion; a concave platform is provided on the outer circle of the radial rib portion; all the concave platforms form a circular stop structure; a segmented stator core is clamped in an empty slot formed between two adjacent radial rib portions; a plurality of segmented stator cores are fixed on the radial rib yoke plate to form a tooth portion of the stator core; a winding is wound on the segmented stator core; a stator outer ring is positioned at the stop by the concave platform and the radial rib yoke plate, and is fixedly connected to the radial rib yoke plate by a flat head bolt; wherein the circular yoke portion and the stator outer ring form a limiting structure for the segmented stator core; the bottom of the radial rib yoke plate, the bottom of the segmented stator core and the bottom of the stator outer ring are on the same plane. The segmented stator core is small in size and easy to process, which improves the production efficiency of the disc motor.

Description

Technical Field

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

[0002] Axial magnetic field motors are also called disc motors. They have the characteristics of small size, light weight, short axial dimension and high power density. They can be used in most thin installation occasions, so they are widely used.

[0003] Unlike ordinary cylindrical motor stator cores that are stacked, disc motor stator cores are often wound by rolling. First, the rolled silicon steel sheet raw material with a certain width is fixed on a rotating support mechanism to ensure smooth feeding. Secondly, the rolled silicon steel sheet (strip) itself has a certain curvature, which needs to be leveled by a flattening mechanism, then punched by a notching mechanism (punch press), and finally the automatic winding process is realized on the coiling mechanism. During the winding process, it is necessary to ensure the consistency of the winding tightness, that is, to ensure the degree of rolling of the stator core (corresponding to the stacking coefficient of the cylindrical motor).

[0004] The advantages of the existing rolling and winding production method are that it saves materials and the molding process is relatively mature. The disadvantages are that the winding speed is slow and the efficiency of making the iron core is low. If mass production is required, only additional winding equipment can be added, which is costly.

[0005] Therefore, how to provide a stator assembly structure of a disc motor to improve the current situation where the stator winding production efficiency of the disc motor is difficult to improve has become a problem that needs to be solved urgently. Summary of the invention

[0006] In view of this, an embodiment of the present invention provides a stator assembly based on a disc-type motor to solve the problem of low production efficiency when the stator core of the disc-type motor is manufactured using a winding process in the prior art.

[0007] An embodiment of the present invention provides a stator assembly based on a disc motor, comprising:

[0008] The radial rib yoke plate is composed of a circular yoke portion on the inner circle and a plurality of radial rib portions extending outward from the circular yoke portion; a concave platform is provided on the outer circle of the radial rib portion; all the concave platforms form a circular stop structure;

[0009] The segmented stator core is clamped in the empty slots formed between two adjacent radial ribs; a plurality of segmented stator cores are fixed on the radial rib yoke plate to form the teeth of the stator core;

[0010] Winding, wound on the segmented stator core;

[0011] The stator outer ring is positioned at the stop by means of the concave platform and the radial rib yoke plate, and is fixedly connected to the radial rib yoke plate by means of flat head bolts;

[0012] The circular yoke and the stator outer ring form a limiting structure for the segmented stator core; the bottom of the radial rib yoke plate, the bottom of the segmented stator core and the bottom of the stator outer ring are on the same plane.

[0013] Optionally, the radial rib yoke plate is made by stacking a number of silicon steel sheets; or, the radial rib yoke plate is made by stacking a number of silicon steel sheets and fixing them by rivets; or, the radial rib yoke plate is made by stacking a number of silicon steel sheets and fixing them by welding.

[0014] Optionally, the radial rib yoke plate is formed by laminating a plurality of first silicon steel sheets, a plurality of second silicon steel sheets and a plurality of third silicon steel sheets;

[0015] Among them, the first silicon steel sheet includes an inner ring and a plurality of radial ribs of a first length and a first width; the second silicon steel sheet includes an inner ring and a plurality of radial ribs of a second length and a first width; the third silicon steel sheet includes an inner ring and a plurality of radial ribs of a second length and a second width; after the two silicon steel sheets of different lengths are stacked, a concave platform is formed on the outer ring; after the two silicon steel sheets of different widths are stacked, a convex structure is formed on both sides of the radial ribs; the convex structure is located at the upper bottom of the radial rib yoke plate; the first length is greater than the second length; the second width is greater than the first width.

[0016] Optionally, the segmented stator core is in a trapezoidal block shape, and its narrower end abuts against the circular yoke portion of the radial rib yoke plate; the length of the segmented stator core is less than or equal to the second length.

[0017] Optionally, grooves matching the protruding structures on both sides of the radial ribs are provided at the upper bottom positions on both sides of the segmented stator core.

[0018] Optionally, a rib is provided on the top of the segmented stator core.

[0019] Optionally, a portion of the segmented stator core that is higher than the radial rib yoke plates is wider than a portion of the segmented stator core that is sandwiched between the radial rib yoke plates.

[0020] Optionally, the winding is a flat copper wire winding or a round enameled wire winding.

[0021] Optionally, it also includes: an end cover, a surface of which is provided with avoidance holes for accommodating flat head bolts for fixing the radial rib yoke plate; the portion of the end cover that contacts the radial rib yoke plate, the segmented stator core and the stator outer ring is a circular boss; cooling fins are provided at the bottom of the end cover; a plurality of channels are provided on the side of the end cover for ventilation and heat dissipation; the channel portion passes through the circular through hole in the middle of the end cover.

[0022] Optionally, it also includes: a closed ring fixed in the circular through hole in the middle of the end cover.

[0023] Beneficial effects of the present invention:

[0024] An embodiment of the present invention provides a stator assembly based on a disc motor, and proposes a segmented stator core and a radial rib yoke plate structure of an inner ring yoke. The segmented stator core is small in size and easy to process, which effectively improves the production efficiency of the disc motor. In addition, the embodiment of the present invention also solves the problem of core deformation during the wire embedding process of the integrated core. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0026] Figure 1 A structural diagram of a stator assembly based on a disc-type motor in an embodiment of the present invention is shown;

[0027] Figure 2 An exploded view of a stator assembly based on a disc-type motor in an embodiment of the present invention is shown;

[0028] Figure 3 A side view of a radial rib yoke plate in an embodiment of the present invention is shown;

[0029] Figure 4 A radial rib yoke plate in an embodiment of the present invention is shown;

[0030] Figure 5 A bottom schematic diagram of the assembly of a radial rib yoke plate and a segmented stator core in an embodiment of the present invention is shown;

[0031] Figure 6 The figure shows a schematic diagram of assembling a radial rib yoke plate, a segmented stator core and a stator outer ring in an embodiment of the present invention; a radial rib yoke plate of a stator assembly based on a disc-type motor;

[0032] Figure 7 A structural diagram of a segmented stator core in an embodiment of the present invention is shown;

[0033] Figure 8 A structural diagram showing a core tooth composed of a plurality of segmented stator cores in an embodiment of the present invention is shown;

[0034] Fig. 9 An assembly diagram of a radial rib yoke plate, a segmented stator core and a winding in an embodiment of the present invention is shown;

[0035] Fig.10 A front structural diagram of an end cover in an embodiment of the present invention is shown;

[0036] Fig.11 A side structural diagram of an end cover in an embodiment of the present invention is shown;

[0037] Fig.12 The figure shows the back structure of an end cover in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0039] like Figures 1 to 12 As shown, the embodiment of the present invention provides a stator assembly based on a disc motor, comprising: a radial rib yoke plate 100, a segmented stator core 200, a winding 300 and a stator outer ring 400, wherein the radial rib yoke plate 100 is composed of a circular yoke portion 101 on the inner circle and a plurality of radial rib portions 102 extending outward from the circular yoke portion 101; a concave platform 103 is provided on the outer circle of the radial rib portion 102; all the concave platforms 103 form a circular Annular stop structure; the block stator core 200 is clamped in the empty slot formed between two adjacent radial ribs; a number of block stator cores 200 are fixed on the radial rib yoke plate 100 to form the teeth of the stator core; the winding 300 is wound on the block stator core 200; the stator outer ring 400 is positioned with the radial rib yoke plate 100 through the concave platform 103, and is fixedly connected with the radial rib yoke plate 100 through the flat head bolt 7. The circular yoke 101 and the stator outer ring 400 form a limiting structure for the block stator core; the bottom of the radial rib yoke plate 100, the bottom of the block stator core 200 and the bottom of the stator outer ring 400 are on the same plane.

[0040] The radial rib yoke plate 100 is formed by stacking a plurality of silicon steel sheets.

[0041] like Figure 3 As shown, the radial rib yoke plate 100 is made by laminating a plurality of silicon steel sheets, opening screw holes on the circular yoke portion 101 and the radial rib portion 102, and then fixing them by rivets, so that the overall structure of the radial rib yoke plate is stable. Alternatively, the radial rib yoke plate 100 is made by laminating a plurality of silicon steel sheets and fixing them by welding.

[0042] like Figure 3 and Figure 4 As shown, the radial rib yoke plate 100 is formed by laminating a plurality of first silicon steel sheets, a plurality of second silicon steel sheets and a plurality of third silicon steel sheets.

[0043] Among them, the first silicon steel sheet includes an inner ring and a plurality of radial ribs of a first length and a first width; the second silicon steel sheet includes an inner ring and a plurality of radial ribs of a second length and a first width; the third silicon steel sheet includes an inner ring and a plurality of radial ribs of a second length and a second width; after the two silicon steel sheets of different lengths are stacked, a concave platform 103 is formed on the outer ring; after the two silicon steel sheets of different widths are stacked, a convex structure is formed on both sides of the radial ribs 102; the convex structure is located at the upper bottom of the radial rib yoke plate 100; the first length is greater than the second length; the second width is greater than the first width.

[0044] like Figure 5 and Figure 6 As shown, the length of the silicon steel sheet at the bottom of the radial rib yoke plate 100 is smaller than that of the silicon steel sheet at the top, forming a recessed platform 103. The stator outer ring 400 and the radial rib yoke plate 100 are positioned by a stopper. Screw holes are provided on the stator outer ring 400 and the recessed platform 103. After being assembled flush, the radial ribs on the yoke plate are fixed by 16 flat head bolts.

[0045] like Figure 7 As shown, the block stator core 200 is a trapezoidal block, and its narrower end is in conflict with the circular yoke 101 of the radial rib yoke plate 100; the length of the block stator core 200 is less than or equal to the second length. Grooves 201 are provided at the upper bottom of both sides of the block stator core 200 to match the protrusions on both sides of the radial rib 102. A rib 202 is provided at the top of the block stator core 200.

[0046] The portion of the segmented stator core 200 that is higher than the radial rib yoke plate 100 is wider than the portion of the segmented stator core 200 that is sandwiched between the radial rib yoke plates 100 , so that a stop structure is also formed between the segmented stator core 200 and the radial rib yoke plates 100 .

[0047] The segmented stator core 200 slides radially into the radial rib yoke plate 100 and is fixed by using the grooves and bosses to achieve axial and radial limitation.

[0048] The segmented stator core teeth are used to provide the tooth magnetic circuit and are an important part of the magnetic circuit. In a specific embodiment, 24 core teeth form a stator core tooth, which is assembled with the radial rib yoke plate to form a complete stator core. During assembly, the height of the 24 tooth surfaces is ensured to be consistent. The bottom of the teeth and yoke plate can be tinned by hot tinning, and the joint between the teeth and the yoke plate is filled with tin to ensure good heat dissipation at the bottom of the yoke plate, i.e., the bottom of the stator.

[0049] As an optional implementation, the winding is a flat copper wire winding or a round enameled wire winding.

[0050] like Figure 10 to Figure 12As shown, it also includes: an end cover 500, on the surface of which a avoidance hole 501 is opened, and the hexagonal flat head bolt can protrude from the bottom surface of the stator core, and the avoidance hole 501 is used to accommodate the flat head bolt used for fixing the radial rib yoke plate 100; the part of the end cover 500 that contacts the radial rib yoke plate 100, the segmented stator core 200 and the stator outer ring 400 is a circular boss 502; a heat dissipation fin 503 is provided at the bottom of the end cover 500; a plurality of channels 504 are opened on the side of the end cover 500 for ventilation and heat dissipation; the channels 504 partially penetrate into the circular through hole in the middle of the end cover 500. The closed ring 600 is welded and fixed in the circular through hole in the middle of the end cover 500 by friction welding, and the motor bearing is installed on the closed ring 600 to achieve fixed installation with the stator assembly.

[0051] The radial rib yoke plate is composed of laminated silicon steel sheets, which are composed of three silicon steel sheets of different specifications and shapes, to achieve the matching of the radial rib yoke plate grooves and bosses, and realize the positioning and installation of the segmented stator core teeth.

[0052] The block stator core teeth material can be silicon steel sheet laminations and soft magnetic SMC material.

[0053] In this embodiment, the stator assembly is a 24-slot scheme, and 24 circular holes are respectively opened at the inner and outer ring fins of the radial rib yoke plate, of which 8 holes evenly distributed on the inner and outer rings are used for fixing the stator assembly to the end cover, and the remaining 16 holes are used for connecting the radial rib yoke plate to the stator outer ring. After the wound segmented iron core is inserted into the radial rib yoke plate, the radial rib yoke plate is connected to the stator outer ring through these 16 holes, thereby ensuring the strength of the outer ring and preventing the overall deformation.

[0054] The end cover and the radial rib yoke plate fin inner and outer circles correspond to 8 hole positions respectively. Pairs of holes are opened and connected by bolts so that the bottom surface of the core and the end surface of the end cover fit tightly together. A layer of thermal conductive silicone grease is evenly applied on the joint surface to increase the thermal conductivity of the joint surface.

[0055] The embodiment of the present invention solves the current situation of the stator winding efficiency of the disc motor well. The block stator core is small in size and easy to process, which can greatly improve the production efficiency of the disc motor. The embodiment of the present invention also solves the problem of core deformation during the wire embedding process of the integrated core.

[0056] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A stator assembly based on a disc motor, characterized in that: include: The radial rib yoke plate (100) is composed of a circular yoke portion (101) on the inner circle and a plurality of radial rib portions (102) extending outward from the circular yoke portion (101); a concave platform (103) is provided on the outer circle of the radial rib portion (102); all the concave platforms (103) form a circular stop structure; A segmented stator core (200) is clamped in an empty slot formed between two adjacent radial ribs; a plurality of segmented stator cores (200) are fixed on the radial rib yoke plate (100) to form a tooth portion of the stator core; A winding (300) is wound on the segmented stator core (200); The stator outer ring (400) is positioned at the stopper through the concave platform (103) and the radial rib yoke plate (100), and is fixedly connected to the radial rib yoke plate (100) through flat head bolts (7); The circular yoke (101) and the stator outer ring (400) form a limiting structure for the segmented stator core; the bottom of the radial rib yoke plate (100), the bottom of the segmented stator core (200) and the bottom of the stator outer ring (400) are on the same plane; The radial rib yoke plate (100) is obtained by laminating a plurality of first silicon steel sheets, a plurality of second silicon steel sheets and a plurality of third silicon steel sheets; Wherein, the first silicon steel sheet comprises an inner ring and a plurality of radial ribs of a first length and a first width; the second silicon steel sheet comprises an inner ring and a plurality of radial ribs of a second length and a first width; the third silicon steel sheet comprises an inner ring and a plurality of radial ribs of a second length and a second width; after the two silicon steel sheets of different lengths are stacked, the concave platform (103) is formed on the outer ring; after the two silicon steel sheets of different widths are stacked, convex structures are formed on both sides of the radial ribs (102); the convex structures are located at the upper bottom of the radial rib yoke plate (100); the first length is greater than the second length; the second width is greater than the first width.

2. The stator assembly based on the disc motor according to claim 1 is characterized in that: The radial rib yoke plate (100) is manufactured by stacking a plurality of silicon steel sheets and fixing them by rivets; or, the radial rib yoke plate (100) is manufactured by stacking a plurality of silicon steel sheets and fixing them by welding.

3. The stator assembly based on a disc motor according to claim 1, characterized in that: The segmented stator core (200) is in a trapezoidal block shape, and its narrower end abuts against the circular yoke portion (101) of the radial rib yoke plate (100); the length of the segmented stator core (200) is less than or equal to the second length.

4. The stator assembly based on the disc motor according to claim 3 is characterized in that: Grooves (201) matching with the protruding structures on both sides of the radial ribs (102) are provided at the upper bottom positions on both sides of the segmented stator core (200).

5. The stator assembly based on a disc motor according to claim 3 is characterized in that: A rib (202) is provided on the top of the segmented stator core (200).

6. The stator assembly based on a disc motor according to claim 3 is characterized in that: The portion of the segmented stator core (200) that is higher than the radial rib yoke plate (100) is wider than the portion of the segmented stator core (200) that is sandwiched between the radial rib yoke plates (100).

7. The stator assembly based on a disc motor according to claim 1, characterized in that: The winding is a flat copper wire winding or a round enameled wire winding.

8. The stator assembly based on a disc motor according to claim 1, characterized in that: Also includes: The end cover (500) has a surface provided with avoidance holes (501) for accommodating flat head bolts for fixing the radial rib yoke plate (100); the portion of the end cover (500) that contacts the radial rib yoke plate (100), the segmented stator core (200) and the stator outer ring (400) is a circular boss (502); a heat dissipation fin (503) is provided at the bottom of the end cover (500); a plurality of channels (504) are provided on the side of the end cover (500) for ventilation and heat dissipation; and the channels (504) partially penetrate into the circular through hole in the middle of the end cover (500).

9. The stator assembly based on a disc motor according to claim 8, characterized in that: Also includes: The closed circular ring (600) is fixed in the circular through hole in the middle of the end cover (500).

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