Electric machine and vehicle

Abstract

The application belongs to the technical field of electric machines, and particularly relates to an electric machine and a vehicle. The electric machine comprises a primary assembly, a secondary assembly, a first supporting part and a second supporting part, the first supporting part is arranged on the primary assembly of the electric machine, the second supporting part is arranged on the secondary assembly of the electric machine, the first supporting part and the second supporting part are inserted into a gap between the primary assembly and the secondary assembly, and the first supporting part and the second supporting part at least partially coincide along the central axis direction of the electric machine. In the application, the first supporting part and the second supporting part at least partially coincide along the central axis of the electric machine, which can ensure that the first supporting part and the second supporting part can contact and abut each other, provide radial supporting force, and prevent radial swing when there is unbalanced magnetic pull between the primary assembly and the secondary assembly, thereby preventing the primary assembly and the secondary assembly from contacting and sweeping the chamber.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric machines, in particular to an electric machine and a vehicle. BACKGROUND

[0002] The active suspension system is a new type of suspension system developed in recent years, and the permanent magnet linear motor is the electromagnetic actuator of the active suspension. Due to the eccentricity in the assembly of the linear motor, the air gap is uneven, and there is a radial unbalanced magnetic pull between the stator and the mover. During the movement of the mover, the stator and the mover are easily in contact and the problem of bore sweeping occurs. Therefore, how to ensure that the stator and the mover run relatively smoothly without radial shaking becomes a big problem in the design of the linear motor. SUMMARY

[0003] The technical problem to be solved by the present application is to solve the problem of the contact between the stator and the mover in the existing linear motor, and to provide an electric machine and a vehicle.

[0004] To solve the above technical problems, on the one hand, the present application provides an electric machine, comprising a primary component, a secondary component, a first support part and a second support part, the first support part is arranged on the primary component, the second support part is arranged on the secondary component, and the first support part and the second support part are inserted into the gap between the primary component and the secondary component.

[0005] The first support part and the second support part at least partially coincide along the central axis direction of the electric machine.

[0006] Optionally, the first support part comprises a first connecting piece and a first abutting piece connected to the first connecting piece, the second support part comprises a second connecting piece and a second abutting piece connected to the second connecting piece, the first connecting piece is used for connecting the primary component, the second connecting piece is used for connecting the secondary component, the first abutting piece and the second abutting piece are arranged in the gap between the primary component and the secondary component, and abut each other.

[0007] Optionally, the first connecting piece and the second connecting piece are away from each other, the first abutting piece and the second abutting piece extend along the axial direction of the electric machine, and the extension direction of the first abutting piece and the extension direction of the second abutting piece are opposite.

[0008] Optionally, the axial length of the first abutting piece is greater than or equal to the relative displacement of the secondary component and the primary component; and / or,

[0009] The axial length of the second abutting piece is greater than or equal to the relative displacement of the secondary component and the primary component.

[0010] Optionally, one of the first abutting member and the second abutting member is a cylindrical structure, and the other is provided with a plurality of structures spaced around the central axis of the motor.

[0011] Optionally, the first abutting member has oppositely arranged first and second wall surfaces, the first wall surface is connected to the first connecting member, and the second wall surface protrudes from or is flush with the outer peripheral surface of the first connecting member in the direction of the second abutting member.

[0012] The second abutting member has oppositely arranged third and fourth wall surfaces, the third wall surface is connected to the second connecting member, and the fourth wall surface protrudes from or is flush with the outer peripheral surface of the second connecting member in the direction of the first abutting member.

[0013] The second wall surface abuts against the fourth wall surface.

[0014] Optionally, the first support portion is made of a non-magnetic material, and the second support portion is made of a non-magnetic material.

[0015] Optionally, the secondary assembly includes a support member and a magnetic steel, the second connecting member is connected to the support member, and the magnetic steel is arranged between the support member and the second abutting member.

[0016] The primary assembly includes a primary core and a coil winding, the primary core is provided with a plurality of core teeth in the axial direction, and a tooth slot is formed between adjacent two core teeth, the coil winding is arranged in the tooth slot, the first connecting member is connected to the primary core, and the first abutting member abuts against the core teeth and the coil winding.

[0017] Optionally, the motor further includes a plurality of heat dissipation fins, the plurality of heat dissipation fins are spaced in the axial direction of the motor, and the heat dissipation fins are arranged around the outer surface of the motor.

[0018] In another aspect, the embodiment of the present application provides a vehicle including the motor as described above.

[0019] The motor provided by the embodiment of the present application can ensure that the first support portion and the second support portion can contact and abut against each other, provide radial support force, and prevent the primary assembly and the secondary assembly from contacting and sweeping the bore when there is an unbalanced magnetic pulling force between the primary assembly and the secondary assembly. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the first support portion provided by an embodiment of the present application;

[0021] Figure 2is a schematic view of the second support part provided by an embodiment of the present application;

[0022] Figure 3 is a schematic view of the cooperation between the first support part and the second support part provided by an embodiment of the present application;

[0023] Figure 4 is a schematic view of the cooperation between the first support part and the primary assembly provided by an embodiment of the present application;

[0024] Figure 5 is a schematic view of the cooperation between the second support part and the secondary assembly provided by an embodiment of the present application;

[0025] Figure 6 is a schematic view of the motor provided by an embodiment of the present application.

[0026] The reference signs in the description are as follows:

[0027] 1, the first support part; 11, the first connecting piece; 12, the first abutting piece; 121, the first wall surface; 122, the second wall surface;

[0028] 2, the second support part; 21, the second connecting piece; 22, the second abutting piece; 221, the third wall surface; 222, the fourth wall surface;

[0029] 3, the secondary assembly; 31, the support piece; 311, the shoulder boss; 312, the buffer piece; 32, the magnetic steel;

[0030] 4, the primary assembly; 41, the primary core; 411, the core body; 412, the connecting shaft; 42, the coil winding;

[0031] 5, the heat dissipation fin. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present application, the technical solutions and beneficial effects clearer and more apparent, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0033] As shown in Figures 1 to 5 , an embodiment of the present application provides a support assembly, which comprises a primary assembly 4, a secondary assembly 3, a first support part 1 and a second support part 2. The first support part 1 is arranged on the primary assembly 4 of the motor, the second support part 2 is arranged on the secondary assembly 3 of the motor, the first support part 1 and the second support part 2 are inserted into the gap between the primary assembly 4 and the secondary assembly 3, the first support part 1 is used to provide radial support force to the primary assembly 4, and the second support part 2 is used to provide radial support force to the secondary assembly 3. The first support part 1 and the second support part 2 at least partially coincide along the central axis of the motor.

[0034] The motor provided by the embodiment of the present application is characterized in that the first support part 1 and the second support part 2 are at least partially coincident along the central axis of the motor, and the first support part 1 and the second support part 2 can contact each other to provide radial support force, so that the primary assembly 4 and the secondary assembly 3 will not swing radially when there is unbalanced magnetic pull between the primary assembly 4 and the secondary assembly 3, and the primary assembly 4 and the secondary assembly 3 are prevented from contacting and sweeping the bore.

[0035] In an embodiment, the first support part 1 is sleeved outside the second support part 2, or the second support part 2 is sleeved outside the first support part 1, so that the first support part 1 and the second support part 2 are coaxially sleeved together to realize the mutual contact between the first support part 1 and the second support part 2.

[0036] In an embodiment, as shown in Figure 1 , Figure 2 the first support part 1 comprises a first connecting piece 11 and a first abutting piece 12 connected to the first connecting piece 11, the first connecting piece 11 is used to connect the primary core 41 of the primary assembly 4, one end of the first abutting piece 12 extends from the first connecting piece 11, and the other end of the first abutting piece 12 is a free end. The second support part 2 comprises a second connecting piece 21 and a second abutting piece 22 connected to the second connecting piece 21, the second connecting piece 21 is used to connect the support piece 31 of the secondary assembly 3, one end of the second abutting piece 22 extends from the second connecting piece 21, and the other end of the second abutting piece 22 is a free end. The first abutting piece 12 and the second abutting piece 22 are arranged in the gap between the primary assembly and the secondary assembly of the motor, the gap between the secondary assembly 3 and the primary assembly 4 is divided into two parts along the axial direction, and the first abutting piece 12 and the second abutting piece 22 abut each other to provide radial support force.

[0037] In an embodiment, the first support part 1 adopts a non-magnetic material, and the second support part 2 adopts a non-magnetic material, so that the first abutting piece 12 and the second abutting piece 22 in the air gap will not affect the magnetic field of the secondary assembly 3 and the primary assembly 4. Preferably, the materials adopted by the first support part 1 and the second support part 2 are resin or aluminum alloy.

[0038] In an embodiment, the sum of the thickness of the first abutting piece 12 and the thickness of the second abutting piece 22 is equal to the thickness of the air gap. Specifically, the thickness of one of the first abutting piece 12 and the second abutting piece 22 is less than or equal to half of the thickness of the air gap, and the thickness of the other is greater than or equal to half of the thickness of the air gap, or the thickness of the first abutting piece 12 is less than or equal to half of the thickness of the air gap, and the thickness of the second abutting piece 22 is less than or equal to half of the thickness of the air gap.

[0039] In an embodiment, as shown in Figure 3As shown, the first connecting piece 11 and the second connecting piece 21 are away from each other and do not coincide in the direction of the central axis of the motor, the first abutting piece 12 and the second abutting piece 22 both extend in the axial direction of the motor, and the extension direction of the first abutting piece 12 and the extension direction of the second abutting piece 22 are opposite, the first abutting piece 12 and the second abutting piece 22 are connected in a sleeved manner, and at least partially coincide in the axial direction, so that when the first support part 1 and the second support part 2 are connected in a sleeved manner, only the first abutting piece 12 and the second abutting piece 22 abut, which can reduce the contact area and reduce the frictional resistance.

[0040] In an embodiment, the axial length of the first abutting piece 12 is greater than or equal to the relative displacement of the secondary assembly 3 and the primary assembly 4, and / or the axial length of the second abutting piece 22 is greater than or equal to the relative displacement of the secondary assembly 3 and the primary assembly 4, so that the first abutting piece 12 and the second abutting piece 22 always abut during the relative movement of the secondary assembly 3 and the primary assembly 4, avoiding the occurrence of sweeping.

[0041] Further, on the secondary assembly, the second connecting piece 21 abuts one end of the magnetic steel 32, the end of the support 31 of the secondary assembly 3 away from the second connecting piece 21 is provided with a shoulder boss 311, the axial two ends of the magnetic steel 32 abut the shoulder boss 311 and the second connecting piece 21 respectively, the radial two sides of the magnetic steel 32 abut the second abutting piece 22 and the support 31 respectively, the axial length of the second abutting piece 22 is greater than or equal to the axial length of the magnetic steel 32 of the secondary assembly 3, and the axial length of the second abutting piece 22 does not exceed the sum of the axial length of the magnetic steel 32 and the axial length of the shoulder boss 311.

[0042] In an embodiment, as shown in Figure 1 , Figure 2 One of the first abutting piece 12 and the second abutting piece 22 is a cylindrical structure, and the other is provided with a plurality of and is arranged at intervals around the central axis of the motor.

[0043] Specifically, the first abutting piece 12 is provided with a plurality of and is arranged at intervals around the outer edge of the first connecting piece 11, the plurality refers to 2 or more, the second abutting piece 22 is a cylindrical structure, the plurality of first abutting pieces 12 are inserted into the cylindrical second abutting piece 22, or the plurality of first abutting pieces 12 are arranged around the second abutting piece 22, the first abutting piece 12 and the second abutting piece 22 can contact each other, and the contact area is small, which has small frictional resistance. The first connecting piece 11 is annular, in order to make the first abutting piece 12 provide better radial support force, the first abutting piece 12 is fan-shaped. On the multi-faceted primary core 41, the first abutting piece 12 is provided in a plate shape.

[0044] In another embodiment not shown, the first abutting member 12 is a cylindrical structure, and the second abutting member 22 is provided in plurality and is arranged at intervals around the outer edge of the second connecting member 21. The second connecting member 21 is annular, and in order to make the second abutting member 22 provide better radial support force, the second abutting member 22 is fan-shaped. On the multi-faceted cylindrical secondary assembly 3, the second abutting member 22 is arranged in a plate shape.

[0045] In an embodiment, as shown in Figure 3 the first abutting member 12 has oppositely arranged first and second wall surfaces 121 and 122, the first wall surface 121 is connected to the first connecting member 11, and the second wall surface 122 protrudes from or is flush with the outer peripheral surface of the first connecting member 11 in the direction towards the second abutting member 22. When the second wall surface 122 is flush with the outer peripheral surface of the first connecting member 11, the end of the first abutting member 12 is embedded on the first connecting member 11, and the first wall surface 121 can abut against the primary core 41. When the second wall surface 122 protrudes from the outer peripheral surface of the first connecting member 11, the first wall surface 121 can abut against the outer peripheral surface of the first connecting member 11 and the primary core 41, and when the axial length of the second abutting member 22 is greater than or equal to the axial length of the magnetic steel 32 of the secondary assembly 3, i.e., the second abutting member 22 and the first connecting member 11 can coincide in the axial direction, the second wall surface 122 protrudes, the second wall surface 122 and the second abutting member 22 can be in contact, the first abutting member 12 is arranged at intervals between the first connecting member 11 and the second abutting member 22, and the first connecting member 11 and the second abutting member 22 cannot be in contact, thereby avoiding the generation of frictional resistance between the first connecting member 11 and the second abutting member 22.

[0046] As shown in Figure 3 the second abutting member 22 has oppositely arranged third and fourth wall surfaces 221 and 222, the third wall surface 221 is connected to the second connecting member 21, and the fourth wall surface 222 protrudes from or is flush with the outer peripheral surface of the second connecting member 21 in the direction towards the first abutting member 12, and the second wall surface 122 abuts against the fourth wall surface 222. When the axial length of the first abutting member 12 is large, in order to avoid the contact between the first abutting member 12 and the second connecting member 21, the fourth wall surface 222 is arranged to protrude from the outer peripheral surface of the second connecting member 21, the fourth wall surface 222 and the first abutting member 12 are in contact, the first abutting member 12 and the second connecting member 21 cannot be in contact, thereby avoiding the generation of frictional resistance between the first abutting member 12 and the second connecting member 21.

[0047] In an embodiment, the motor is a cylindrical linear motor, the primary assembly 4 is a stator, the secondary assembly 3 is a mover, the gap between the secondary assembly 3 and the primary assembly 4 is an air gap, the air gap is 0.5-2 mm, the secondary assembly 3 is arranged inside the primary assembly 4, or the secondary assembly 3 is sleeved on the outside of the primary assembly 4.

[0048] In an embodiment, as shown in Figure 4 , Figure 5 The secondary assembly 3 includes a support 31 and a magnetic steel 32, the second connecting member 21 is connected to the support 31, the magnetic steel 32 is arranged between the support 31 and the second abutting member 22, the second support part 2 is integrally injection molded with the secondary assembly 3, and the second support part 2 is connected with the support 31 and the magnetic steel 32 by injection molding.

[0049] The primary assembly 4 includes a primary core 41 and a coil winding 42, the primary core 41 is provided with a plurality of core teeth in the axial direction, and a tooth slot is arranged between adjacent two core teeth, the first connecting member 11 is connected to the primary core 41, the first support part 1 abuts the core teeth and the coil winding 42, the first support part 1 is integrally injection molded with the primary assembly 4, the first support part is connected with the primary core 41 by injection molding, a plurality of coil windings 42 are arranged in the tooth slots, the connecting wires are connected in series with the coil windings 42 distributed in different tooth slots in one phase, one end of the coil windings 42 in series in one phase is connected with the wires of other phases, and the other end is led out to connect the controller, the coil windings 42 in the tooth slots are connected to form multiple phases to constitute an armature winding.

[0050] The primary core 41 is a magnetic steel 32 or a silicon steel sheet or other magnetic material, the material of the magnetic steel 32 is a neodymium iron boron material, and the material of the support 31 is a non-magnetic heat-treated aluminum alloy material.

[0051] In an embodiment, the number of tooth slots is determined according to the pole-slot combination selected by the motor. The axial length of the tooth slot = (total length of the primary core 41 / number of slots)*(0.3-0.7), wherein the total length of the primary core 41 / number of slots is equal to the total length of one tooth slot and one core tooth on the primary core 41, and one tooth slot needs to occupy 0.3-0.7 of the total length. The depth of the tooth slot = (the outer diameter of the primary core 41-the inner diameter of the primary core 41)*(0.65-0.85), the primary core 41 is a cylindrical shape, the difference between the outer diameter of the primary core 41 and the inner diameter of the primary core 41 is equal to the thickness of the primary core 41, and the tooth slot needs to occupy 0.65-0.85 of the thickness of the primary core 41 in the radial direction.

[0052] In an embodiment, as shown in Figure 4 , Figure 5As shown, in the cylindrical permanent magnet linear motor with the outer mover and the inner stator, the secondary assembly 3 is arranged outside the primary assembly 4, the second support part 2, the magnetic steel 32 and the support part 31 are coaxially arranged, the second connecting part 21 is in a cylindrical structure, the second connecting part 21 is arranged inside the support part 31 and at an axial end of the magnetic steel 32, and in a radial direction away from the central axis, the magnetic steel 32 is arranged outside the second abutting part 22, the support part 31 is arranged outside the magnetic steel 32, the second abutting part 22 can be in a cylindrical structure or a strip structure, and the second abutting part 22 is arranged at an outer edge of the second connecting part 21. Here, the outer edge refers to an edge of the second connecting part 21 away from the support part 31.

[0053] The primary iron core 41 includes an iron core body 411 and a connecting shaft 412 connected to one end of the iron core body 411, and the first connecting part 11 is in a ring shape and is arranged on the connecting shaft 412. The first abutting part 12 can be in a cylindrical structure or a strip structure, a first wall surface 121 of the first abutting part 12 abuts on an outer circumferential surface of the iron core body 411, an inner diameter of the ring-shaped first abutting part 12 is equal to an outer diameter of the iron core body 411, a second wall surface 122 of the first abutting part 12 abuts on a fourth wall surface 222 of the second abutting part 22, so as to ensure that the primary assembly 4 and the secondary assembly 3 are in contact, and an outer diameter of the first connecting part 11 is less than or equal to a sum of the outer diameter of the iron core body 411 and a thickness of the first abutting part 12.

[0054] When the outer diameter of the first connecting part 11 is equal to the sum of the outer diameter of the iron core body 411 and the thickness of the first abutting part 12, the second wall surface 122 is flush with an outer circumferential surface of the first connecting part 11. When the outer diameter of the first connecting part 11 is less than the sum of the outer diameter of the iron core body 411 and the thickness of the first abutting part 12, the second wall surface 122 protrudes from the outer circumferential surface of the first connecting part 11. At this time, preferably, the outer diameter of the first connecting part 11 is consistent with the outer diameter of the iron core body 411. The first abutting part 12 is connected to an outer circumferential surface of the first connecting part 11. Here, the outer circumferential surface refers to a surface of the first connecting part 11 away from the iron core body 411.

[0055] Preferably, one of the first abutting part 12 and the second abutting part 22 is in a cylindrical structure, and the other is in a strip structure.

[0056] In another embodiment not shown, in the cylindrical permanent magnet linear motor with the outer stator and the inner mover, the secondary assembly 3 is arranged inside the primary assembly 4, the second support part 2, the magnetic steel 32 and the support part 31 are coaxially arranged, the second connecting part 21 is in a ring shape, in a radial direction away from the central axis, the magnetic steel 32 is arranged outside the support part 31, the second abutting part 22 is arranged outside the magnetic steel 32, the second connecting part 21 is arranged on the support part 31, the second abutting part 22 can be in a cylindrical structure or a strip structure, and the second abutting part 22 is connected to an outer edge of the second connecting part 21.

[0057] The first connecting piece 11 is in a cylindrical shape, the first connecting piece 11 is arranged in the primary core 41, the first abutting piece 12 abuts on the inner circumferential surface of the core body 411, the first abutting piece 12 can be in a cylindrical shape or a strip shape, and the first abutting piece 12 is connected to the inner circumferential surface of the first connecting piece 11. Preferably, one of the first abutting piece 12 and the second abutting piece 22 is in a cylindrical shape, and the other is in a strip shape.

[0058] In an embodiment, as shown in Figure 5 The motor further comprises a plurality of heat dissipation fins 5 for increasing the contact area between the motor housing and the air, and for dissipating heat by contacting the air. The heat dissipation fins 5 are annular, and a plurality of heat dissipation fins 5 are arranged on the outer surface of the motor in an axial direction, the distance between adjacent heat dissipation fins 5 is greater than 10 mm, the projections of adjacent heat dissipation fins 5 on the outer surface of the motor do not overlap, the heat dissipation fins 5 are arranged in a radial direction, perpendicular to the outer surface of the motor, and the thickness of the heat dissipation fins 5 is greater than 5 mm.

[0059] In the cylindrical permanent magnet linear motor with the outer rotor and the inner stator, the support 31 is located at the outermost side and can act as the motor housing, and the heat dissipation fins 5 are arranged on the outer surface of the support 31. In the cylindrical permanent magnet linear motor with the inner rotor and the outer stator, the motor further comprises a housing, the housing is sleeved on the outside of the primary assembly 4, the secondary assembly 3 is arranged inside the primary assembly 4, and the heat dissipation fins 5 are arranged on the outer surface of the housing.

[0060] In an embodiment, as shown in Figure 5 The support 31 is internally provided with a buffer 312, the buffer 312 is used to provide a buffering effect when the primary assembly 4 and the secondary assembly 3 move relative to each other, and prevents the primary assembly and the secondary assembly from colliding.

[0061] In another aspect, the embodiment of the present application provides a vehicle comprising the motor of the above-mentioned embodiment.

[0062] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electric machine characterized in that, The motor comprises a primary assembly, a secondary assembly, a first support part and a second support part, the first support part is arranged on the primary assembly, the second support part is arranged on the secondary assembly, and the first support part and the second support part are inserted into a gap between the primary assembly and the secondary assembly; The first support part and the second support part at least partially coincide along the central axis direction of the motor; The first support part comprises a first connecting piece and a first abutting piece connected to the first connecting piece, the second support part comprises a second connecting piece and a second abutting piece connected to the second connecting piece, the first connecting piece is used for connecting the primary assembly, the second connecting piece is used for connecting the secondary assembly, the first abutting piece and the second abutting piece are arranged in the gap between the primary assembly and the secondary assembly and abut each other; the first connecting piece and the second connecting piece do not coincide along the central axis direction of the motor, the first abutting piece and the second abutting piece are connected in a sleeved manner and at least partially coincide along the central axis direction of the motor.

2. The electric machine of claim 1, wherein, The first connecting piece and the second connecting piece are away from each other, the first abutting piece and the second abutting piece extend along the axial direction of the motor, and the extending direction of the first abutting piece and the extending direction of the second abutting piece are opposite.

3. The electric machine of claim 1, wherein, The axial length of the first abutting piece is greater than or equal to the relative displacement between the secondary assembly and the primary assembly. And / or, The axial length of the second abutting piece is greater than or equal to the relative displacement between the secondary assembly and the primary assembly.

4. The electric machine of claim 1, wherein, One of the first abutting piece and the second abutting piece is a cylindrical structure, and the other is provided with a plurality of structures and is arranged at intervals around the central axis of the motor.

5. The electric machine of claim 4, wherein, The first abutting piece has oppositely arranged first and second wall surfaces, the first wall surface is connected to the first connecting piece, and the second wall surface protrudes from or is flush with the outer peripheral surface of the first connecting piece in the direction of the second abutting piece; The second abutting piece has oppositely arranged third and fourth wall surfaces, the third wall surface is connected to the second connecting piece, and the fourth wall surface protrudes from or is flush with the outer peripheral surface of the second connecting piece in the direction of the first abutting piece; The second wall surface abuts against the fourth wall surface.

6. The electric machine of claim 1, wherein, The first support part is made of a non-magnetic material, and the second support part is made of a non-magnetic material.

7. The electric machine of claim 1, wherein, The secondary assembly comprises a support and a magnetic steel, the second connecting piece is connected to the support, and the magnetic steel is arranged between the support and the second abutting piece; The primary assembly comprises a primary iron core and a coil winding, the primary iron core is provided with a plurality of core teeth in the axial direction, a tooth slot is formed between adjacent two core teeth, the coil winding is arranged in the tooth slot, the first connecting piece is connected to the primary iron core, and the first abutting piece abuts against the core teeth and the coil winding.

8. The electric machine of claim 1, wherein, The motor further comprises a plurality of heat dissipation fins, the plurality of heat dissipation fins are arranged at intervals along the axial direction of the motor, and the heat dissipation fins are arranged on the outer surface of the motor.

9. A vehicle characterized by comprising: The motor comprises any one of claims 1-8. The motor comprises any one of claims 1-8.

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