Flat wire motors and mobility scooters

Abstract

This utility model discloses a flat wire motor and a mobility scooter. The flat wire motor includes a stator core and a stator winding. The stator core includes at least two stator teeth arranged at intervals along its circumference, with stator slots defined between any two adjacent stator teeth. The stator winding includes at least two sets of U-shaped wires and connecting wires. The number of sets of U-shaped wires, the number of sets of connecting wires, and the number of stator teeth are equal and correspond one-to-one. Each set of U-shaped wires includes at least two U-shaped wires arranged radially along the stator core. In each set of U-shaped wires, at least two U-shaped wires are fitted onto corresponding stator teeth. Each set of connecting wires includes at least two connecting wires arranged radially along the stator core. Adjacent U-shaped wires are connected by connecting wires. The portions of the U-shaped wires inserted into adjacent stator slots are arranged at intervals along the circumference of the stator core. The two connecting ends of the connecting wires are staggered along the circumference of the stator core. The flat wire motor provided by this utility model has the advantages of compact structure, small size, and high aesthetic appeal.

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 at least two stator teeth arranged at intervals along its circumference, and a stator slot is defined between any two adjacent stator teeth. The stator winding includes at least two sets of U-shaped wires and at least two sets of connecting wires. The number of sets of U-shaped wires, the number of sets of connecting wires, and the number of stator teeth are equal and correspond one-to-one. Each set of U-shaped wires includes at least two U-shaped wires arranged sequentially along the radial direction of the stator core. In each set of U-shaped wires, at least two U-shaped wires are sleeved on the corresponding stator teeth. Each set of connecting wires includes at least two connecting wires arranged sequentially along the radial direction of the stator core. Adjacent U-shaped wires are connected by the connecting wires. The portions of the U-shaped wires inserted into the adjacent two stator slots are arranged at intervals along the circumference of the stator core. The two connecting ends of the connecting wires are staggered along the circumference of the stator core.

[0008] According to an embodiment of the present invention, the flat wire motor includes at least two sets of U-shaped wires corresponding one-to-one with stator teeth in the stator winding. Each set of U-shaped wires includes at least two U-shaped wires arranged radially along the stator core, and both of these U-shaped wires cross the corresponding stator teeth. That is, a portion of the stator winding crosses a stator tooth in the form of U-shaped wires. When at least two U-shaped wires in the same set are connected by connecting wires, the connecting wires do not need to avoid other U-shaped wires that are not connected to them in the axial direction of the stator core. Furthermore, at least two connecting wires in each set are arranged radially along the stator core, meaning at least two connecting wires are located on the same horizontal plane. All connecting wires can be positioned closer to the end face of the stator core, thereby effectively reducing the axial dimension of the flat wire motor. The flat wire motor has a more compact structure and smaller volume. When used as a hub motor, it occupies less space in a personal mobility vehicle, resulting in a more aesthetically pleasing appearance.

[0009] In some embodiments, at least two sets of the U-shaped wires are arranged sequentially along the circumference of the stator core.

[0010] In some embodiments, the 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 inserted into two adjacent stator slots and arranged at intervals along the circumference of the stator core. The first insertion segment and the second insertion segment are the same size. The two connecting ends of each connecting wire are misaligned along the circumference of the stator core by a distance less than or equal to the maximum radial dimension of the first insertion segment in the stator core.

[0011] 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 portion of the first insertion section located within the stator slot has the same cross-sectional size and shape at any position along its extension direction.

[0012] 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.

[0013] 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, and the first insertion section located in the stator slot has a rectangular cross-section with the same size at any position in its extension direction.

[0014] In some embodiments, both the first insertion segment and the second insertion segment extend axially along the stator core and partially protrude from the side of the stator core away from the first intermediate segment, and the connecting line is located on the side of the stator core away from the first intermediate segment.

[0015] In any two adjacent U-shaped lines in each group of U-shaped lines, the connecting line is welded between the first insertion segment of one U-shaped line and the second insertion segment of the other U-shaped line.

[0016] In some embodiments, in the same group of U-shaped lines, at least two of the first insertion segments protruding from the side of the stator core away from the first intermediate segment are arranged at radial intervals along the stator core, and at least two of the second insertion segments protruding from the side of the stator core away from the first intermediate segment are arranged at radial intervals along the stator core.

[0017] In some embodiments, the flat wire motor further includes a partition plate disposed on the side of the stator core away from the first intermediate section. The partition plate forms a plurality of limiting grooves for the connecting wires to engage with, and the partition plate separates any two adjacent connecting wires arranged radially along the stator core.

[0018] In some embodiments, the stator winding 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 at least two split-phase windings arranged circumferentially along the stator core, each of the split-phase windings including at least two sets of the U-shaped wires arranged adjacent to each other.

[0019] The stator winding further includes an interphase bridging line, and in at least two of the phase windings of each of the U-phase winding, the V-phase winding and the W-phase winding, two adjacent phase windings are connected by the interphase bridging line.

[0020] In some embodiments, the phase-to-phase bridging line includes a first connecting segment, a second 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 respectively welded to the sides of the first insertion segment and the second insertion segment. The second intermediate segment is located on the inner circumference side, outer circumference side, or side away from the first intermediate segment of the stator core; and / or,

[0021] Each of the phase windings also includes an inter-tooth bridging line, and adjacent sets of U-shaped lines are connected through the inter-tooth bridging line.

[0022] In some embodiments, the inter-tooth bridging line is located on the side of the stator core away from the first intermediate section, and the two ends of the inter-tooth bridging line are respectively welded to the sides of the first insertion section and the second insertion section.

[0023] The mobility scooter according to an embodiment of the present invention includes a flat wire motor as described in any of the above embodiments.

[0024] 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

[0025] Figure 1 This is a schematic diagram of a flat wire motor according to an embodiment of the present utility model.

[0026] Figure 2 This is another schematic diagram of a flat wire motor according to an embodiment of the present utility model.

[0027] Figure 3 This is a schematic diagram of the stator core in a flat wire motor according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the stator core and insulating paper in a flat wire motor according to an embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the stator core, insulating paper, and partition in a flat wire motor according to an embodiment of the present utility model.

[0030] Figure 6 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 utility model.

[0031] Figure 7 This is a schematic diagram of the phase winding in a flat wire motor according to an embodiment of the present utility model.

[0032] Figure 8 This is another schematic diagram of the phase-splitting winding in a flat wire motor according to an embodiment of the present utility model.

[0033] Figure 9 This is a schematic diagram of the U-shaped wire in the flat wire motor according to an embodiment of the present utility model.

[0034] Figure label:

[0035] 1. Stator core; 11. Stator slot; 12. Stator tooth; 2. Stator winding; 21. U-shaped wire; 211. First insertion section; 212. First intermediate section; 213. Second insertion section; 22. Connecting wire; 23. Phase-to-phase bridging wire; 24. Tooth-to-tooth bridging wire; 25. Phase-separated winding; 3. Partition plate; 4. Insulating paper. Detailed Implementation

[0036] 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.

[0037] The following is combined Figures 1-9 A flat wire motor according to an embodiment of the present utility model is described.

[0038] The flat wire motor of this utility model embodiment includes a stator core 1 and a stator winding 2. The stator core 1 includes at least two 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 at least two sets of U-shaped wires 21 and at least two sets of connecting wires 22. The number of sets of U-shaped wires 21, the number of sets of connecting wires 22, and the number of stator teeth 12 are equal and correspond one-to-one. Each set of U-shaped wires 21 includes at least two U-shaped wires 21 arranged sequentially along the radial direction of the stator core 1. In each set of U-shaped wires 21, at least two U-shaped wires 21 are sleeved on the corresponding stator teeth 12. Each set of connecting wires 22 includes at least two connecting wires 22 arranged sequentially along the radial direction of the stator core 1. Adjacent U-shaped wires 21 are connected by connecting wires 22. The portions of the U-shaped wires 21 inserted into adjacent stator slots 11 are arranged at intervals along the circumference of the stator core 1. The two connecting ends of the connecting wires 22 are staggered along the circumference of the stator core 1.

[0039] According to the flat wire motor of the present invention, the stator winding 2 is provided to include at least two sets of U-shaped wires 21 corresponding one-to-one with the stator teeth 12, and each set of U-shaped wires 21 includes at least two U-shaped wires 21 arranged in sequence along the radial direction of the stator core 1, and the at least two U-shaped wires 21 cross the corresponding stator teeth 12. That is, a part of the stator winding 2 crosses a stator tooth 12 in the form of a U-shaped wire 21. At this time, when at least two U-shaped wires 21 in the same group are connected by connecting wires 22, the connecting wires 22 do not need to avoid other U-shaped wires 21 that are not connected to them in the axial direction of the stator core 1. At least two connecting wires 22 in each group are arranged in sequence along the radial direction of the stator core 1, that is, at least two connecting wires 22 are located on the same horizontal plane. All connecting wires 22 can be set closer to the end face of the stator core 1, thereby effectively reducing the axial dimension of the flat wire motor. The flat wire motor has a more compact structure and smaller volume. When used as a hub motor, it occupies less space in the mobility scooter, and the mobility scooter has a more aesthetically pleasing appearance in this case.

[0040] It should be noted that, such as Figure 4 and Figure 7As shown, each group of U-shaped wires 21 may include five U-shaped wires 21. The portions of the five 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 U-shaped wires 21 ensures that the two are insulated from each other. In addition, insulating paper 4 is inserted into each stator slot 11. The insulating paper 4 separates the portion 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. In the same group of U-shaped wires 21, the connection between two adjacent U-shaped wires 21 through the connecting wire 22 includes series connection and parallel connection. In this embodiment, two adjacent U-shaped wires 21 are connected in series through the connecting wire 22.

[0041] In some embodiments, such as Figure 7 As shown, at least two sets of U-shaped wires 21 are arranged sequentially along the circumference of the stator core 1. That is, adjacent sets of U-shaped wires 21 do not intersect, and the portions of adjacent sets of U-shaped wires 21 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 21 can include a larger number of U-shaped wires 21, thereby making the distribution of the stator windings 2 more uniform and improving the smoothness of motor operation. At the same time, this arrangement also ensures that the assembly of each set of U-shaped wires 21 on the stator core 1 does not interfere with each other, resulting in higher assembly efficiency.

[0042] In some embodiments, such as Figure 9 As shown, the U-shaped wire 21 includes a first insertion segment 211, a first intermediate segment 212, and a second insertion segment 213 connected in sequence. The first insertion segment 211 and the second insertion segment 213 are respectively inserted into two adjacent stator slots 11 and arranged at intervals along the circumference of the stator core 1. The first insertion segment 211 and the second insertion segment 213 are the same size. The two connecting ends of each connecting wire 22 are misaligned along the circumference of the stator core 1 by a distance less than or equal to the maximum radial dimension of the first insertion segment 211 in the stator core 1.

[0043] That is, the two connecting ends of the connecting line 22 only need to be able to connect to the first insertion section 211 and the second insertion section 213 arranged circumferentially offset along the stator core 1, so as to realize the series connection of two adjacent U-shaped lines 21. Based on the fact that at least two connecting lines 22 are on the same horizontal plane, the probability of two adjacent connecting lines 22 directly contacting each other and forming an electrical connection is effectively reduced, and the volume and cost of the connecting line 22 are also effectively reduced.

[0044] For example, such as Figure 6 and Figure 7As shown, the same group of connecting lines 22 includes four connecting lines 22. The outer contour of the connecting lines 22 is generally Z-shaped. The radial dimension of the connecting line 22 in the stator core 1 is smaller than the radial dimension of the first insertion section 211 and the second insertion section 213 in the stator core 1. The misalignment distance between the two connecting ends of the connecting line 22 is equal to the maximum radial dimension of the first insertion section 211 in the stator core 1.

[0045] In some embodiments, the stator teeth 12 are rectangular teeth, the stator slots 11 are fan-shaped slots whose width gradually increases outward along the radial direction of the stator core 1, and the portion of the first insertion section 211 located in the stator slot 11 has the same cross-sectional size and shape at any position in its extension direction, wherein the circumferential dimension of the portion of the first insertion section 211 located in the stator slot 11 gradually increases outward along the radial direction of 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 U-shaped wires 21 have the same size, resulting in lower manufacturing difficulty and cost.

[0049] In some embodiments, such as Figure 3 and Figure 4 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 located in the stator slot 11 has a rectangular cross-section with the same size at any position in its extension direction.

[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 21, at least two first intermediate segments 212 gradually increase in size along the radial direction of the stator core 1 in the circumferential direction, so that the at least two 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 first insertion segment 211 and the second insertion segment 213 both extend axially along the stator core 1 and partially protrude from the side of the stator core 1 away from the first intermediate segment 212, and the connecting wire 22 is located on the side of the stator core 1 away from the first intermediate segment 212. In any two adjacent U-shaped wires 21 of each group of U-shaped wires 21, a connecting wire 22 is welded between the first insertion segment 211 in one U-shaped wire 21 and the second insertion segment 213 in the other U-shaped wire 21.

[0053] That is, the first insertion section 211, the connecting line 22 and the second insertion section 213 are welded in sequence and arranged in a direction perpendicular to the axial direction of the stator core 1. This realizes the series connection of the two U-shaped lines 21, and also effectively avoids the connecting line 22 from being too far away from the stator core 1, which would increase the axial dimension of the flat wire motor. The flat wire motor has a more compact structure and a smaller size.

[0054] For example, the connecting wire 22 is completely hidden between the first insertion segment 211 and the second insertion segment 213, that is, the entire connecting wire 22 is located on the side of the movable end face of the first insertion segment 211 facing the stator core 1. In other words, taking the connecting wire 22 as a Z-shaped flat wire as an example, the thickness of the connecting wire 22 is less than or equal to the length of the portion of the first insertion segment 211 and the second insertion segment 213 that protrudes from the stator slot 11.

[0055] In some embodiments, in the same group of U-shaped lines 21, at least two first insertion segments 211 protrude from the side of the stator core 1 away from the first intermediate segment 212 and are arranged at radial intervals along the stator core 1, and at least two second insertion segments 213 protrude from the side of the stator core 1 away from the first intermediate segment 212 and are arranged at radial intervals along the stator core 1.

[0056] This effectively avoids direct contact between the parts of two adjacent first insertion sections 211 protruding from the stator core 1 in the same group of U-shaped wires 21, thus preventing an increase in the risk of electrical connection. It also effectively avoids direct contact between the parts of two adjacent second insertion sections 213 protruding from the stator core 1 in the same group of U-shaped wires 21, thus preventing an increase in the risk of electrical connection. The circuit formed by the stator winding 2 has higher reliability.

[0057] For example, the portion of each of the first insertion segment 211 and the second insertion segment 213 protruding from the side of the stator core 1 away from the first intermediate segment 212 is thinned on both radial sides of the stator core 1 so that the radial dimension of this portion of the stator core 1 is smaller than the radial dimension of the portion of each of the first insertion segment 211 and the second insertion segment 213 located in the stator slot 11.

[0058] In some embodiments, the flat wire motor further includes a partition 3, which is disposed on the side of the stator core 1 away from the first intermediate section 212. The partition 3 forms a plurality of limiting grooves for the connecting wires 22 to cooperate with. The partition 3 separates any two adjacent connecting wires 22 arranged radially along the stator core 1.

[0059] This effectively prevents the two connecting wires 22 from abutting each other, thus increasing the electrical connection efficiency and further ensuring the working performance of the flat wire motor. At the same time, the partition 3 also positions the connecting wires 22 through the limiting groove, thereby facilitating the welding operation of the connecting wires 22 with the first insertion section 211 and the second insertion section 213.

[0060] For example, such as Figure 1 and Figure 2 As shown, the partition 3 corresponds one-to-one with the stator teeth 12. The surface of the partition 3 facing away from the stator core 1 is provided with five limiting grooves. The five limiting grooves are arranged at intervals along the radial direction of the stator core 1. Each limiting groove is used to mate with a connecting wire 22.

[0061] 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 at least two phase-splitting windings 25 arranged circumferentially along the stator core 1. Each phase-splitting winding 25 includes at least two sets of adjacent U-shaped wires 21. The stator winding 2 also includes an interphase bridging wire 23. In at least two of the U-phase windings, V-phase windings, and W-phase windings, adjacent two phase-splitting windings 25 are connected by the interphase bridging wire 23.

[0062] This means splitting each of the U-phase, V-phase, and W-phase windings into at least two split-phase windings 25 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.

[0063] like Figure 6 and Figure 8 As shown, taking the U-phase winding as an example, it includes four phase windings 25. Each phase winding 25 includes four sets of U-shaped wires 21 and three inter-tooth bridging wires 24 for connecting the four sets of U-shaped wires 21 in series. The four phase windings 25 are connected in series through three inter-phase bridging wires 23. The two phase windings 25 located at the edge both form U-terminals.

[0064] It should be noted that, taking the stator winding 2 in stator slot 11 arranged in five layers along the radial direction of stator core 1 as an example, two U terminals are set in the first layer of stator slot 11, two V terminals are set in the third layer of stator slot 11, and two W terminals are set in the fifth layer of stator slot 11. One U terminal, one V terminal and one W terminal can be connected to each other to form a star connection. Alternatively, one U terminal can be connected to one V terminal to form a U phase line, another V terminal can be connected to one W terminal to form a V phase line, and another W terminal can be connected to another U terminal to form a W phase line, i.e., a delta connection is formed.

[0065] For example, taking a stator with 48 teeth 12, the U-shaped wires 21 on teeth 1-4 can be connected to form the first phase winding 25 of the U phase, the U-shaped wires 21 on teeth 13-16 can be connected to form the second phase winding 25 of the U phase, the U-shaped wires 21 on teeth 25-28 can be connected to form the third phase winding 25 of the U phase, and the U-shaped wires 21 on teeth 37-40 can be connected to form the fourth phase winding 25 of the U phase.

[0066] The U-shaped wire 21 on teeth 5-8 is connected to the first phase winding 25 of phase V; the U-shaped wire 21 on teeth 17-20 is connected to the second phase winding 25 of phase V; the U-shaped wire 21 on teeth 29-32 is connected to the third phase winding 25 of phase V; and the U-shaped wire 21 on teeth 41-44 is connected to the fourth phase winding 25 of phase V.

[0067] The U-shaped wire 21 on teeth 9-12 is connected to the first phase winding 25 of phase W; the U-shaped wire 21 on teeth 21-24 is connected to the second phase winding 25 of phase W; the U-shaped wire 21 on teeth 33-36 is connected to the third phase winding 25 of phase W; and the U-shaped wire 21 on teeth 45-48 is connected to the fourth phase winding 25 of phase W.

[0068] The wire ends of the first, fifth, and ninth teeth form the motor UVW wire, which connects to the motor controller.

[0069] Alternatively, in at least two of the phase windings 25 of each of the U-phase winding, V-phase winding and W-phase winding, two adjacent phase windings 25 may also be connected in parallel or in series-parallel via phase-to-phase bridging lines 23.

[0070] In addition, each of the U-phase winding, V-phase winding and W-phase winding may include only one phase winding 25, and each phase winding 25 may include only one set of U-shaped wires 21.

[0071] In some embodiments, the phase-to-phase bridge line 23 includes a first connecting segment, a second 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 respectively welded to the side of the first insertion segment 211 and the second insertion segment 213. The second 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.

[0072] The first connecting section and the second connecting section are respectively welded to the sides of the first insertion section 211 and the second insertion section 213, effectively preventing the first connecting section and the second connecting section from excessively occupying the axial dimension of the flat wire motor. Setting the second intermediate section on the inner or outer circumference of the stator core 1 can further reduce the axial dimension of the flat wire motor, resulting in less axial space occupied by the motor shaft when used as a hub motor, thus improving the aesthetics of the vehicle. Alternatively, the second intermediate section can be located on the side of the stator core 1 opposite to the first intermediate section 212, thereby effectively preventing the phase-to-phase bridge wire 23 from encroaching on the radial space of the stator core 1, effectively reducing the radial dimension of the flat wire motor.

[0073] In some embodiments, such as Figure 6 and Figure 7 As shown, each phase winding 25 also includes an inter-tooth bridging line 24, and adjacent sets of U-shaped lines 21 are connected through the inter-tooth bridging line 24. This eliminates the need to bend some of the U-shaped lines 21 to connect adjacent sets of U-shaped lines 21, resulting in higher assembly efficiency for the stator winding 2.

[0074] For example, in each phase winding 25, two adjacent sets of U-shaped wires 21 are connected in series through inter-tooth bridging wires 24.

[0075] In some embodiments, such as Figure 7 As shown, the inter-tooth bridging wire 24 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 bridging wire 24 are respectively welded to the sides of the first insertion section 211 and the second insertion section 213. At this time, the inter-tooth bridging wire 24 does not protrude from the side of the first insertion section 211 and the second insertion section 213 away from the stator core 1, thereby further reducing the axial dimension of the flat wire motor, making the structure of the flat wire motor more compact and smaller in size.

[0076] The mobility scooter according to embodiments of the present invention includes a flat wire motor as described in any of the above embodiments.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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, include: Stator core (1), the stator core (1) includes at least two 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 at least two sets of U-shaped wires (21) and at least two sets of connecting wires (22). The number of sets of U-shaped wires (21), the number of sets of connecting wires (22), and the number of stator teeth (12) are equal and correspond one-to-one. Each set of U-shaped wires (21) includes at least two U-shaped wires (21) arranged sequentially along the radial direction of the stator core (1). In each set of U-shaped wires (21), at least two U-shaped wires (21) are sleeved together. Corresponding to the stator teeth (12), each set of connecting lines (22) includes at least two connecting lines (22) arranged sequentially along the radial direction of the stator core (1). Two adjacent U-shaped lines (21) are connected by the connecting lines (22). The portions of the U-shaped lines (21) inserted into the adjacent two stator slots (11) are arranged at intervals along the circumference of the stator core (1). The two connecting ends of the connecting lines (22) are arranged in a staggered manner along the circumference of the stator core (1).

2. The flat wire motor according to claim 1, characterized in that At least two sets of the U-shaped wires (21) are arranged sequentially along the circumference of the stator core (1).

3. The flat wire motor of claim 2, wherein The U-shaped line (21) includes a first insertion segment (211), a first intermediate segment (212), and a second insertion segment (213) connected in sequence. The first insertion segment (211) and the second insertion segment (213) are respectively inserted into two adjacent stator slots (11) and arranged at intervals along the circumference of the stator core (1). The first insertion segment (211) and the second insertion segment (213) are the same size. The two connecting ends of each connecting line (22) are misaligned along the circumference of the stator core (1) by a distance less than or equal to the maximum radial dimension of the first insertion segment (211) in the stator core (1).

4. The flat wire motor according to claim 3, characterized in that The stator teeth (12) are rectangular teeth, and the stator slots (11) are fan-shaped slots whose width gradually increases outward along the radial direction of the stator core (1). The portion of the first insertion section (211) located within the stator slot (11) has the same cross-sectional size and shape at any position in its extension direction. The portion of the first insertion segment (211) located in the stator slot (11) has a circumferential dimension in the stator core (1) that gradually increases radially outward from the stator core (1), or the portion of the first insertion segment (211) located in the stator slot (11) has a circumferential dimension in the stator core (1) that is at any position.

5. The flat wire motor of claim 3, wherein 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 portion of the first insertion section (211) located in the stator slot (11) has a rectangular cross-section with the same size at any position in its extension direction.

6. The flat wire motor of claim 3, wherein The first insertion segment (211) and the second insertion segment (213) both extend along the axial direction of the stator core (1) and partially protrude from the side of the stator core (1) away from the first intermediate segment (212). The connecting line (22) is located on the side of the stator core (1) away from the first intermediate segment (212). In any two adjacent U-shaped lines (21) of each group of U-shaped lines (21), the connecting line (22) is welded between the first insertion segment (211) of one U-shaped line (21) and the second insertion segment (213) of the other U-shaped line (21).

7. Flat wire motor according to claim 6, characterized in that In the same group of U-shaped lines (21), at least two of the first insertion segments (211) protrude from the side of the stator core (1) away from the first intermediate segment (212) and are arranged at radial intervals along the stator core (1), and at least two of the second insertion segments (213) protrude from the side of the stator core (1) away from the first intermediate segment (212) and are arranged at radial intervals along the stator core (1).

8. The flat wire motor of claim 6, wherein The flat wire motor also includes a partition (3), which is disposed on the side of the stator core (1) away from the first intermediate section (212). The partition (3) forms a plurality of limiting grooves for the connecting wires (22) to cooperate with. The partition (3) separates any two adjacent connecting wires (22) arranged radially along the stator core (1).

9. A flat wire motor according to any of claims 3-8, characterized in that 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 including at least two split-phase windings (25) arranged circumferentially along the stator core (1), each of the split-phase windings (25) including at least two sets of the U-shaped wires (21) arranged adjacent to each other; The stator winding (2) further includes an interphase bridging line (23), and in at least two of the phase windings (25) of each of the U-phase winding, the V-phase winding and the W-phase winding, two adjacent phase windings (25) are connected by the interphase bridging line (23).

10. The flat wire motor of claim 9, wherein The phase-to-phase bridge line (23) includes a first connecting segment, a second intermediate segment, and a second connecting segment connected in sequence. Both the first connecting segment and the second connecting segment are located on the side of the stator core (1) away from the first intermediate segment (212) and are respectively welded to the sides of the first insertion segment (211) and the second insertion segment (213). The second intermediate segment is located on the inner circumference, outer circumference, or side away from the first intermediate segment (212) of the stator core (1); and / or, Each of the phase windings (25) also includes an inter-tooth bridging line (24), and two adjacent sets of U-shaped lines (21) are connected by the inter-tooth bridging line (24).

11. The flat wire motor of claim 10, wherein The inter-tooth bridging line (24) 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 bridging line (24) are respectively welded to the sides of the first insertion section (211) and the second insertion section (213).

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

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