Flat wire motor and scooter

Abstract

The utility model discloses a flat wire motor and a scooter, flat wire motor includes stator core and stator winding, and stator core includes a plurality of stator teeth along its circumferential arrangement, and the stator slot is defined between any two adjacent stator teeth, and stator winding includes a plurality of groups of U-shaped lines, and each group of U-shaped lines includes a plurality of first U-shaped lines sequentially arranged along the radial of stator core, and the first U-shaped line includes first insertion section, first intermediate section and second insertion section connected in turn, and first insertion section and second insertion section are located in the two stator slots of adjacent respectively and are arranged in the circumferential of stator core and are staggered, and in the two first U-shaped lines of same group U-shaped line, the free end of first insertion section in one first U-shaped line forms first welding part, and the free end of second insertion section in another first U-shaped line forms second welding part, and first welding part and second welding part are connected. The utility model provides flat wire motor has compact structure, small volume, and the advantage that the appearance degree is high.

Description

Technical Field

[0001] This utility model relates to the field of mobility scooter technology, specifically to a flat wire motor and a mobility scooter. Background Technology

[0002] The stator core of the hub motor commonly used in two-wheeled mobility scooters is usually made into a single ring with stator slots on the outside, where multiple wires are wound. To improve the utilization rate of the stator slots, some hub motors use flat wires wound in the stator slots.

[0003] In related technologies, the stator windings typically span multiple teeth, meaning that after the winding extends from one stator slot, it crosses multiple teeth and inserts into another stator slot. However, this configuration usually results in the portion of the winding outside the stator slot occupying too much space to avoid interference with the other windings, thus making the axial dimension of the flat wire motor larger. When used as a hub motor, it suffers from the problems of large space occupation and low aesthetic appeal. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose a flat wire motor, which has the advantages of compact structure, small size, and high aesthetic appearance.

[0006] An embodiment of this utility model also proposes a mobility scooter.

[0007] The flat wire motor of this utility model embodiment includes a stator core and a stator winding. The stator core includes a plurality of stator teeth arranged at intervals along its circumference, and a stator slot is defined between any two adjacent stator teeth. The stator winding includes multiple sets of U-shaped wires, the number of sets of U-shaped wires being equal to the number of stator teeth and corresponding one-to-one. Each set of U-shaped wires includes a plurality of first U-shaped wires arranged sequentially along the radial direction of the stator core. The first U-shaped wire includes a first insertion segment, a first intermediate segment, and a second insertion segment connected in sequence. The first insertion segment and the second insertion segment are respectively located in two adjacent stator slots and are staggered along the circumference of the stator core. In two adjacent first U-shaped wires in the same set of U-shaped wires, the free end of the first insertion segment in one first U-shaped wire is bent toward the second insertion segment to form a first welded part, and the free end of the second insertion segment in the other first U-shaped wire is bent toward the first insertion segment to form a second welded part. The first welded part and the second welded part are arranged and connected along the circumference of the stator core.

[0008] According to an embodiment of the present invention, the flat wire motor includes a stator winding comprising multiple sets of U-shaped wires corresponding one-to-one with stator teeth. Each set of U-shaped wires includes multiple first U-shaped wires arranged radially along the stator core, and each of these first U-shaped wires crosses a corresponding stator tooth. That is, a portion of the stator winding crosses a stator tooth in the form of a first U-shaped wire. Consequently, the first intermediate segment of any first U-shaped wire will not interfere with other first intermediate segments in the axial direction of the stator core. This first intermediate segment can be positioned closer to the end face of the stator core. Furthermore, the first welded portion of the first U-shaped wire and the second welded portion of the adjacent first U-shaped wire are arranged circumferentially along the stator core and connected. That is, the first welded portion and the second welded portion are located on the same plane and can be positioned closer to the end face of the stator core. This effectively reduces the axial dimension of the flat wire motor, resulting in a more compact structure and smaller volume. When used as a hub motor, it occupies less space in a personal mobility vehicle, enhancing the vehicle's aesthetic appeal.

[0009] In some embodiments, in each group of U-shaped lines, all the first welded portions are arranged sequentially along the radial direction of the stator core, and all the second welded portions are arranged sequentially along the radial direction of the stator core.

[0010] In some embodiments, each group of U-shaped lines further includes a second U-shaped line, the second U-shaped line including a third insertion segment, a second intermediate segment and a fourth insertion segment connected in sequence, the third insertion segment and the fourth insertion segment being located in two adjacent stator slots and arranged in a staggered manner along the circumference of the stator core;

[0011] In the same group of U-shaped wires, along the radial direction of the stator core, the third insertion segment and the fourth insertion segment are respectively located on the first side and the second side of at least two first U-shaped wires. The third insertion segment and one of the first insertion segments are arranged along the circumference of the stator core and bent and connected to each other. The fourth insertion segment and one of the second insertion segments are arranged at intervals along the circumference of the stator winding.

[0012] In some embodiments, multiple sets of the U-shaped wires are arranged sequentially along the circumference of the stator core.

[0013] In some embodiments, the stator teeth are rectangular teeth, and the stator slots are fan-shaped slots whose width gradually increases radially outward from the stator core. The portions of the first insertion section and the second insertion section located within the stator slots have the same dimensions, and the cross-sectional shape of the portion of the first insertion section located within the stator slot at any position in its extension direction is the same.

[0014] The portion of the first insertion section located within the stator slot has a circumferential dimension in the stator core that gradually increases radially outward from the stator core; or, any position of the portion of the first insertion section located within the stator slot has a circumferential dimension that is equal to that of the stator core.

[0015] In some embodiments, the stator slot is a rectangular slot, the stator tooth is a fan-shaped tooth whose width gradually increases outward along the radial direction of the stator core, the first insertion section and the second insertion section are the same size in the stator slot, and the cross-section of the first insertion section in the stator slot at any position in its extension direction is rectangular and has the same size.

[0016] In some embodiments, the stator windings define a U-phase winding, a V-phase winding, and a W-phase winding, each of the U-phase winding, the V-phase winding, and the W-phase winding includes a plurality of phase windings arranged circumferentially along the stator core, each phase winding including at least two sets of U-shaped wires arranged adjacent to each other.

[0017] The stator winding also includes an interphase bridging line, and in each of the U-phase winding, the V-phase winding and the W-phase winding, two adjacent interphase windings are connected by the interphase bridging line.

[0018] In some embodiments, the phase-to-phase bridge line includes a first connecting segment, a third intermediate segment, and a second connecting segment connected in sequence. The first connecting segment and the second connecting segment are both located on the side of the stator core away from the first intermediate segment and are welded to the first insertion segment and the second insertion segment, respectively. The third intermediate segment is located on the inner circumference side, the outer circumference side, or the side away from the first intermediate segment of the stator core.

[0019] In some embodiments, each of the phase windings further includes an inter-tooth bridging line, and two adjacent sets of U-shaped lines are connected by the inter-tooth bridging line.

[0020] In some embodiments, the inter-tooth bridging line is located on the side of the stator core opposite to the first intermediate section, and the two ends of the inter-tooth bridging line are welded to the first insertion section and the second insertion section, respectively.

[0021] The mobility scooter according to an embodiment of the present invention includes a flat wire motor as described in any of the above embodiments.

[0022] The technical advantages of the mobility scooter according to the present invention are the same as those of the flat wire motor in the above embodiments, and will not be repeated here. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a flat wire motor according to an embodiment of the present invention.

[0024] Figure 2 This is another schematic diagram of a flat wire motor according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the stator core and U-phase winding in a flat wire motor according to an embodiment of the present invention.

[0026] Figure 4 This is another schematic diagram of the stator core and U-phase winding in a flat wire motor according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the first U-shaped wire in a flat wire motor according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the stator winding in a flat wire motor according to an embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of the stator winding and insulating paper in a flat wire motor according to an embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of a phase winding in a flat wire motor according to an embodiment of the present invention.

[0031] Figure label:

[0032] 1. Stator core; 11. Stator slot; 12. Stator tooth; 2. Stator winding; 21. First U-shaped wire; 211. First insertion section; 2111. First welded part; 212. First intermediate section; 213. Second insertion section; 2131. Second welded part; 22. Phase-to-phase bridging wire; 23. Tooth-to-tooth bridging wire; 24. Phase-splitting winding; 3. Insulating paper. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] The following is combined Figures 1-8 A flat wire motor according to an embodiment of the present utility model is described.

[0035] The flat wire motor of this utility model embodiment includes a stator core 1 and a stator winding 2. The stator core 1 includes a plurality of stator teeth 12 arranged at intervals along its circumference, and a stator slot 11 is defined between any two adjacent stator teeth 12. The stator winding 2 includes multiple sets of U-shaped wires, the number of sets of U-shaped wires being equal to the number of stator teeth 12 and corresponding one-to-one. Each set of U-shaped wires includes a plurality of first U-shaped wires 21 arranged sequentially along the radial direction of the stator core 1. The first U-shaped wire 21 includes a first insertion section 211, a first intermediate section 212, and a second insertion section 213 connected in sequence. The first insertion section 211 and the second insertion section 213 are respectively located in two adjacent stator slots 11 and are staggered along the circumference of the stator core 1. In two adjacent first U-shaped lines 21 of the same group of U-shaped lines, the free end of the first insertion segment 211 in one of the first U-shaped lines 21 is bent toward the second insertion segment 213 to form a first welded part 2111, and the free end of the second insertion segment 213 in the other first U-shaped line 21 is bent toward the first insertion segment 211 to form a second welded part 2131. The first welded part 2111 and the second welded part 2131 are arranged and connected along the circumference of the stator core 1.

[0036] According to the flat wire motor of the present utility model embodiment, the stator winding 2 is provided to include multiple sets of U-shaped wires corresponding one-to-one with the stator teeth 12, and the multiple sets of U-shaped wires include multiple first U-shaped wires 21 arranged in sequence along the radial direction of the stator core 1, and the multiple first U-shaped wires 21 all cross the corresponding stator teeth 12. That is, a portion of the stator winding 2 crosses a stator tooth 12 in the form of a first U-shaped wire 21, so that the first intermediate section 212 of any first U-shaped wire 21 will not interfere with the other first intermediate sections 212 in the axial direction of the stator core 1. The first intermediate section 212 can be set closer to the end face of the stator core 1. In addition, the first welded part 2111 of the first U-shaped wire 21 and the second welded part 2131 of the adjacent first U-shaped wire 21 are arranged and connected along the circumference of the stator core 1. That is, the first welded part 2111 and the second welded part 2131 are located on the same plane and can be set closer to the end face of the stator core 1. This effectively reduces the axial dimension of the flat wire motor, making the structure of the flat wire motor more compact and smaller in size. When used as a hub motor, it occupies less space in the scooter, and the scooter has a more aesthetically pleasing appearance.

[0037] It should be noted that each group of U-shaped wires may include four first U-shaped wires 21. The portions of the four first U-shaped wires 21 located in the same stator slot 11 are arranged sequentially along the radial direction of the stator core 1 and abut against each other in pairs. The insulating varnish on the outer surface of the first U-shaped wires 21 ensures insulated contact between them. In addition, as Figure 7 As shown, each stator slot 11 is filled with insulating paper 3, which separates the part of the stator winding 2 located in the stator slot 11 from the stator core 1, so as to effectively prevent the stator winding 2 from being electrically connected to the stator core 1.

[0038] In some embodiments, such as Figure 1 and Figure 3 As shown, in each group of U-shaped lines, all the first welded parts 2111 are arranged in sequence along the radial direction of the stator core 1, and all the second welded parts 2131 are arranged in sequence along the radial direction of the stator core 1.

[0039] That is, all the first welded parts 2111 and all the second welded parts 2131 are located on the same plane, so that any first welded part 2111 and second welded part 2131 can be set closer to the end face of the stator core 1, thereby further reducing the axial dimension of the flat wire motor and making the flat wire motor smaller in size.

[0040] For example, the first weld portion 2111 is orthogonal to the remainder of the first insertion section 211 (the first insertion portion located within the stator slot 11), and the second weld portion 2131 is orthogonal to the remainder of the second insertion section 213 (the second insertion portion located within the stator slot 11). The first weld portion 2111 and the first intermediate portion are located on the same side of the first insertion portion, and the second weld portion 2131 and the first intermediate portion are located on the same side of the second insertion portion. At this time, in two adjacent first U-shaped lines 21 of the same group, the first weld portion 2111 of one first U-shaped line 21 and the second weld portion 2131 of the other first U-shaped line 21 are welded to opposite sides of each other along the radial direction of the stator core 1.

[0041] In some embodiments, each group of U-shaped wires further includes a second U-shaped wire, which includes a third insertion segment, a second intermediate segment, and a fourth insertion segment connected in sequence. The third and fourth insertion segments are located in two adjacent stator slots 11 and are staggered along the circumference of the stator core 1. In the same group of U-shaped wires, along the radial direction of the stator core 1, the third and fourth insertion segments are located on the first and second sides of at least two first U-shaped wires 21, respectively. The third insertion segment and one of the first insertion segments 211 are arranged along the circumference of the stator core 1 and bent and connected to each other. The fourth insertion segment and one of the second insertion segments 213 are arranged at intervals along the circumference of the stator winding 2.

[0042] The third and fourth insertion sections of the second U-shaped wire can fill the space vacated in the stator slot 11 due to the staggered arrangement of multiple first U-shaped wires 21, thereby effectively improving the utilization rate of the stator slot 11 and effectively improving the power and efficiency of the flat wire motor. Moreover, each group of U-shaped wires can also be easily connected to the other groups of U-shaped wires through the second insertion section 213 and the fourth insertion section.

[0043] For example, in any first U-shaped line 21, the first insertion segment 211 and the second insertion segment 213 are circumferentially offset in the stator core 1 by a radial dimension of the first insertion segment 211 in the stator core 1. The radial dimensions of each of the first insertion segment 211, the second insertion segment 213, the third insertion segment, and the fourth insertion segment in the stator core 1 are equal.

[0044] In some embodiments, such as Figure 3 and Figure 8 As shown, multiple sets of U-shaped wires are arranged sequentially along the circumference of the stator core 1. That is, adjacent sets of U-shaped wires do not intersect, and the portions of adjacent sets of U-shaped wires inserted into the same stator slot 11 are arranged along the circumference of the stator core 1. In this case, along the radial direction of the stator core 1, each set of U-shaped wires can include a greater number of first U-shaped wires 21, thereby making the distribution of the stator windings 2 more uniform and improving the smoothness of motor operation. Simultaneously, this arrangement also ensures that the assembly of each set of U-shaped wires on the stator core 1 does not interfere with each other, resulting in higher assembly efficiency.

[0045] In some embodiments, the stator teeth 12 are rectangular teeth, and the stator slots 11 are fan-shaped slots whose width gradually increases radially outward from the stator core 1. The portions of the first insertion section 211 and the second insertion section 213 located within the stator slot 11 have the same size, and the cross-sectional shape of the portion of the first insertion section 211 located within the stator slot 11 at any position in its extension direction is the same. Specifically, the circumferential dimension of the portion of the first insertion section 211 located within the stator slot 11 gradually increases radially outward from the stator core 1.

[0046] With the number of first insertion segments 211 and second insertion segments 213 accommodating each stator slot 11 being equal, the above arrangement enables the first insertion segments 211 and second insertion segments 213 to fill the internal space of the stator slot 11, thereby effectively improving the utilization rate of the stator slot 11 and effectively improving the power and efficiency of the flat wire motor.

[0047] For example, the first insertion segment 211 and the second insertion segment 213, which are arranged circumferentially along the stator core 1 in the same stator slot 11, are in close contact with each other, and their opposite sides are in close contact with the opposite sides of the stator slot 11 along the circumferential direction of the stator core 1.

[0048] Alternatively, the stator teeth 12 can be rectangular, and the stator slots 11 can be fan-shaped slots whose width gradually increases radially outward from the stator core 1. The circumferential dimensions of any position of the first insertion section 211 within the stator slot 11 are all equal in the stator core 1. In this case, all the first U-shaped lines 21 have the same size, resulting in lower manufacturing difficulty and cost.

[0049] In some embodiments, such as Figure 6 As shown, the stator slot 11 is a rectangular slot, and the stator tooth 12 is a fan-shaped tooth whose width gradually increases outward along the radial direction of the stator core 1. The first insertion section 211 and the second insertion section 213 have the same size in the part located in the stator slot 11. The cross-section of the part of the first insertion section 211 located in the stator slot 11 at any position in its extension direction is rectangular and has the same size.

[0050] With the number of first insertion segments 211 and second insertion segments 213 accommodating each stator slot 11 being equal, the above arrangement enables the first insertion segments 211 and second insertion segments 213 to fill the internal space of the stator slot 11, thereby effectively improving the utilization rate of the stator slot 11 and effectively improving the power and efficiency of the flat wire motor.

[0051] For example, in each set of U-shaped lines, the dimensions of multiple first intermediate segments 212 along the circumferential direction of the stator core 1 gradually increase outward along the radial direction of the stator core 1, so that the multiple first intermediate segments 212 can be adapted to different regions of the corresponding sector stator teeth 12 along the radial direction of the stator core 1.

[0052] In some embodiments, the stator winding 2 defines a U-phase winding, a V-phase winding, and a W-phase winding. Each of the U-phase winding, V-phase winding, and W-phase winding includes a plurality of phase-splitting windings 24 arranged circumferentially along the stator core 1. Each phase-splitting winding 24 includes at least two sets of adjacent U-shaped wires. The stator winding 2 also includes an interphase bridging line 22. In each of the U-phase winding, V-phase winding, and W-phase winding, adjacent two phase-splitting windings 24 are connected by the interphase bridging line 22.

[0053] This means that each of the U-phase, V-phase, and W-phase windings is split into multiple phase windings 24 arranged circumferentially along the stator core 1, which can effectively improve the magnetic field distribution, reduce harmonic content, and also effectively improve motor efficiency and power density.

[0054] like Figure 3 and Figure 4 As shown, taking the U-phase winding as an example, it includes four phase windings 24. Each phase winding 24 includes four sets of U-shaped wires and three inter-tooth bridging wires 23 for connecting the four sets of U-shaped wires in series. The four phase windings 24 are connected in series through three inter-phase bridging wires 22. The two phase windings 24 located at the edge both form U-terminals.

[0055] For example, taking a stator with 48 teeth 12, the first U-shaped wires 21 on teeth 1-4 can be connected to form the first phase winding 24 of the U phase, the first U-shaped wires 21 on teeth 13-16 can be connected to form the second phase winding 24 of the U phase, the first U-shaped wires 21 on teeth 25-28 can be connected to form the third phase winding 24 of the U phase, and the first U-shaped wires 21 on teeth 37-40 can be connected to form the fourth phase winding 24 of the U phase.

[0056] The first U-shaped wire 21 on teeth 5-8 is connected to the first phase winding 24 of phase V; the first U-shaped wire 21 on teeth 17-20 is connected to the second phase winding 24 of phase V; the first U-shaped wire 21 on teeth 29-32 is connected to the third phase winding 24 of phase V; and the first U-shaped wire 21 on teeth 41-44 is connected to the fourth phase winding 24 of phase V.

[0057] The first U-shaped wire 21 on teeth 9-12 is connected to the first phase winding 24 of phase W; the first U-shaped wire 21 on teeth 21-24 is connected to the second phase winding 24 of phase W; the first U-shaped wire 21 on teeth 33-36 is connected to the third phase winding 24 of phase W; and the first U-shaped wire 21 on teeth 45-48 is connected to the fourth phase winding 24 of phase W.

[0058] The wire ends of the first, fifth, and ninth teeth form the motor UVW wire, which connects to the motor controller.

[0059] Alternatively, among the multiple phase windings 24 in each of the U-phase winding, V-phase winding and W-phase winding, two adjacent phase windings 24 can also be connected in parallel or in series-parallel via phase-to-phase bridging lines 22.

[0060] In addition, each of the U-phase winding, V-phase winding and W-phase winding may also include only one phase winding 24, and each phase winding 24 may also include only one set of U-shaped wires.

[0061] In some embodiments, the phase-to-phase bridge line 22 includes a first connecting segment, a third intermediate segment, and a second connecting segment connected in sequence. The first connecting segment and the second connecting segment are both located on the side of the stator core 1 away from the first intermediate segment 212 and are welded to the second insertion segment 213 and the fourth insertion segment, respectively. The third intermediate segment is located on the inner circumference side, the outer circumference side, or the side away from the first intermediate segment 212 of the stator core 1.

[0062] By positioning the third intermediate section on the inner or outer circumference of the stator core 1, the axial dimension of the flat wire motor can be further reduced. When used as a hub motor, it occupies less axial space on the motor shaft, resulting in a more aesthetically pleasing appearance for the vehicle. Alternatively, the third intermediate section can be positioned on the side of the stator core 1 opposite to the first intermediate section 212, thereby effectively preventing the phase-to-phase bridge wire 22 from encroaching on the radial space of the stator core 1 and effectively reducing the radial dimension of the flat wire motor.

[0063] In some embodiments, each phase winding 24 further includes an inter-tooth bridging line 23, through which adjacent sets of U-shaped lines are connected. This eliminates the need to bend portions of the first U-shaped lines 21 to achieve the connection of adjacent sets of first U-shaped lines 21, resulting in higher assembly efficiency for the stator winding 2.

[0064] For example, such as Figure 4 and Figure 8 As shown, two adjacent sets of U-shaped wires are connected in series by inter-tooth bridging wire 23. The inter-tooth bridging wire 23 is also U-shaped. The two parts of the inter-tooth bridging wire 23 are respectively inserted into two adjacent stator slots 11. The two ends of the inter-tooth bridging wire 23 are respectively welded to the first insertion section 211 and the second insertion section 213, thereby effectively improving the utilization rate of the stator slots 11 and effectively improving the power and efficiency of the flat wire motor.

[0065] The mobility scooter according to embodiments of the present invention includes a flat wire motor as described in any of the above embodiments.

[0066] The technical advantages of the mobility scooter according to the present invention are the same as those of the flat wire motor in the above embodiments, and will not be repeated here.

[0067] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A flat wire motor, characterized by, The application relates to a stator core (1) comprising a plurality of stator teeth (12) arranged at intervals along the circumferential direction of the stator core (1), and a plurality of stator slots (11) defined between any two adjacent stator teeth (12); and a stator winding (2) comprising a plurality of groups of U-shaped wires, the number of the groups of U-shaped wires being equal to the number of the stator teeth (12) and corresponding one by one, each group of U-shaped wires comprising a plurality of first U-shaped wires (21) arranged at intervals along the radial direction of the stator core (1) in sequence, each first U-shaped wire (21) comprising a first insertion section (211), a first intermediate section (212) and a second insertion section (213) connected in sequence, the first insertion section (211) and the second insertion section (213) being arranged at intervals along the circumferential direction of the stator core (1) in the two adjacent stator slots (11) respectively; and the first insertion section (211) of one of the first U-shaped wires (21) in the two adjacent first U-shaped wires (21) in the same group of U-shaped wires is bent towards the second insertion section (213) to form a first welding section (2111), and the free end of the second insertion section (213) of the other first U-shaped wire (21) is bent towards the first insertion section (211) to form a second welding section (2131), the first welding section (2111) and the second welding section (2131) being arranged at intervals along the circumferential direction of the stator core (1) and connected in sequence. In each group of U-shaped wires, all the first welding sections (2111) are arranged at intervals along the radial direction of the stator core (1) in sequence, and all the second welding sections (2131) are arranged at intervals along the radial direction of the stator core (1) in sequence. Each group of U-shaped wires further comprises a second U-shaped wire comprising a third insertion section, a second intermediate section and a fourth insertion section connected in sequence, the third insertion section and the fourth insertion section being arranged at intervals along the circumferential direction of the stator core (1) in the two adjacent stator slots (11) respectively; In the same group of U-shaped wires, along the radial direction of the stator core (1), the third insertion section and the fourth insertion section are located on the first side and the second side of at least two first U-shaped wires (21) respectively, the third insertion section and one of the first insertion sections (211) are arranged at intervals along the circumferential direction of the stator core (1) and connected by being bent towards each other, and the fourth insertion section and one of the second insertion sections (213) are arranged at intervals along the circumferential direction of the stator winding (2).

2. The flat wire motor according to claim 1, characterized in that The plurality of groups of U-shaped wires are arranged at intervals along the circumferential direction of the stator core (1) in sequence.

3. The flat wire motor of claim 2, wherein The stator teeth (12) are rectangular teeth, the stator slots (11) are fan-shaped slots with the width gradually increasing along the radial direction of the stator core (1) outwards, the size of the part of the first insertion section (211) and the second insertion section (213) located in the stator slot (11) is the same, the size and shape of the cross section of the part of the first insertion section (211) located in the stator slot (11) are the same at any position in the extension direction of the first insertion section (211), and ​ 4. The flat wire motor of claim 1, wherein ​ 5. The flat wire motor of claim 1, wherein ​ The size of the portion of the first inserted section (211) located in the stator slot (11) gradually increases along the radial direction of the stator core (1), or the size of any position of the portion of the first inserted section (211) located in the stator slot (11) is equal.

6. The flat wire motor of claim 1, wherein The stator slot (11) is a rectangular slot, the stator tooth (12) is a scallop tooth with a gradually increasing width along the radial direction of the stator core (1), the size of the portion of the first inserted section (211) and the second inserted section (213) located in the stator slot (11) is the same, and the shape of the cross section of the portion of the first inserted section (211) located in the stator slot (11) at any position in the extension direction thereof is rectangular and has the same size.

7. The flat wire motor of claim 2, wherein The stator winding (2) defines a U-phase winding, a V-phase winding and a W-phase winding, each of the U-phase winding, the V-phase winding and the W-phase winding includes a plurality of phase division windings (24) arranged at intervals along the circumferential direction of the stator core (1), and each phase division winding (24) includes at least two groups of U-shaped wires arranged adjacently; The stator winding (2) further includes an inter-phase bridge wire (22), and among the plurality of phase division windings (24) in each of the U-phase winding, the V-phase winding and the W-phase winding, two adjacent phase division windings (24) are connected by the inter-phase bridge wire (22).

8. The flat wire motor of claim 7, wherein The inter-phase bridge wire (22) includes a first connecting section, a third intermediate section and a second connecting section connected in sequence, the first connecting section and the second connecting section are located on the side of the stator core (1) away from the first intermediate section (212) and are respectively welded to the first inserted section (211) and the second inserted section (213), and the third intermediate section is located on the inner circumferential side, the outer circumferential side or the side of the stator core (1) away from the first intermediate section (212).

9. The flat wire motor of claim 7, wherein Each phase division winding (24) further includes an inter-tooth bridge wire (23), and two adjacent groups of U-shaped wires are connected by the inter-tooth bridge wire (23).

10. The flat wire motor of claim 9, wherein The inter-tooth bridge wire (23) is located on the side of the stator core (1) away from the first intermediate section (212), and the two ends of the inter-tooth bridge wire (23) are respectively welded to the first inserted section (211) and the second inserted section (213).

11. A scooter, characterized in that A flat wire motor comprising the flat wire motor according to any one of claims 1-10.

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