Stator and motor

Abstract

The stator comprises an iron core, a winding and a reinforcing piece, the winding is wound on the iron core, the winding is provided with a first welding end and a second welding end which extend out of the iron core, and the first welding end and the second welding end are oppositely arranged in the radial direction of the stator and are welded. The reinforcing piece comprises a welding cavity, the first welding end and the second welding end extend into the welding cavity, and the reinforcing piece is welded to at least one of the first welding end and the second welding end. When the first welding end and the second welding end are welded, the reinforcing piece can be connected to the outer sides of the first welding end and the second welding end in a sleeving mode, so that the first welding end and the second welding end are indirectly welded through the reinforcing piece, the welding area of the first welding end and the second welding end can be increased, and the welding strength of the first welding end and the second welding end is improved; the height of the welding end along the axis direction of the stator is reduced by increasing the welding surface, so that the height of the stator along the axis direction is moderate, and arrangement of a motor in a vehicle is facilitated.

Description

Technical Field

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

[0002] A motor includes a stator and a rotor. The stator includes a stator winding formed by flat copper wires. The stator winding is made into a hairpin shape and passes through the stator slots, and two copper wires at one end of the hairpin are welded together to form a welding end. However, the two copper wires at one welding end are only welded through one welding surface. In order to increase the welding strength, the height of the welding end is often increased, which in turn leads to an increase in the height of the stator in the axial direction, and is not conducive to the spatial layout of the motor. Summary of the Utility Model

[0003] This application provides a stator and a motor, which are used to solve the problem that the height of the welding end along the axis of the stator is relatively large and is not conducive to the spatial layout of the motor.

[0004] In the first aspect of this application, a stator is provided. The stator includes an iron core, a winding, and a reinforcing member. The winding is wound around the iron core. The winding has a first welding end and a second welding end extending out of the iron core. The first welding end and the second welding end are arranged opposite to each other along the radial direction of the stator and are welded. The reinforcing member includes a welding cavity. The first welding end and the second welding end extend into the welding cavity, and the reinforcing member is welded to at least one of the first welding end and the second welding end.

[0005] In this solution, when the first welding end and the second welding end are welded, the reinforcing member can be sleeved outside the first welding end and the second welding end and welded to at least one of them, so that in addition to direct welding, the first welding end and the second welding end are also indirectly welded through the reinforcing member, which can increase the welding area between the first welding end and the second welding end and improve the welding strength of the first welding end and the second welding end. In addition, this solution does not need to increase the height of the first welding end and the second welding end along the axial direction to improve the welding strength. Under the condition of ensuring the same welding strength, the stator reduces the height of the welding end along the axis of the stator by increasing the welding surface, so that the height of the stator in the axial direction is moderate and will not cause the size of the stator in the axial direction to be too large, which is convenient for the layout of the rotating shaft in the vehicle.

[0006] In this solution, the reinforcing member at least includes a first reinforcing portion, a second reinforcing portion, and a connecting portion. The connecting portion connects the first reinforcing portion and the second reinforcing portion. The first reinforcing portion is welded to the first welding end, and the second reinforcing portion is welded to the second welding end.

[0007] In this solution, the first reinforcing part is welded to the first welding end, and the second reinforcing part is welded to the second welding end, so that in addition to the direct welding between the first welding end and the second welding end, they are also indirectly welded through the reinforcing member. Moreover, the reinforcing member is welded to both the first welding end and the second welding end, so that the welding strength between the reinforcing member and the first welding end and the second welding end is relatively high, increasing the welding strength between the first welding end and the second welding end, reducing the risk of poor welding at the welding end, and further reducing the risk of open circuit in the winding. At the same time, there is no need to increase the height of the first welding end and the second welding end along the axial direction to improve the welding strength.

[0008] In this solution, the first welding end has a first end face and a second end face that are oppositely arranged along the radial direction of the stator, the second welding end has a third end face and a fourth end face that are oppositely arranged along the radial direction of the stator, the second end face is welded to the third end face, the first reinforcing part is welded to the first end face, and the second reinforcing part is welded to the fourth end face.

[0009] In this solution, the first end face, the second end face, the third end face, and the fourth end face are arranged in sequence along the radial direction of the stator. The second end face is welded to the third end face so that there is a first welding surface (direct welding) between the first welding end and the second welding end. The inner wall of the first reinforcing part facing the second reinforcing part is connected to the first end face so that there is a second welding surface between the first welding end and the first reinforcing part. The inner wall of the second reinforcing part facing the first reinforcing part is welded to the second end face so that there is a third welding surface between the second welding end and the second reinforcing part. Furthermore, through the connecting part connecting the first reinforcing part and the second reinforcing part, the first welding end and the second welding end indirectly have three welding surfaces, namely the first welding surface, the second welding surface, and the third welding surface arranged along the radial direction of the stator. Therefore, there are at least three welding surfaces between the first welding end and the second welding end in this solution. Without making the welding end have a high welding height, the welding strength between the first welding end and the second welding end can be increased, and thus the welding height of the welding end is moderate, which is convenient for the arrangement of the rotating shaft in the vehicle.

[0010] In this solution, along the axial direction of the stator, the first welding end has a first surface facing away from the iron core, the second welding end has a second surface facing away from the iron core, and the connecting part is welded to the first surface, and / or the connecting part is welded to the second surface.

[0011] In this solution, on the basis of welding the first reinforcing part to the first welding end and the second reinforcing part to the second welding end, the connecting part is welded to the first surface, and / or the connecting part is welded to the second surface, which can further increase the welding surface between the reinforcing part and the first welding end and the second welding end, thereby indirectly increasing the welding surface of the first welding end and the second welding end, facilitating improving the connection reliability between the reinforcing part and the welding end, and further reducing the risk of the reinforcing part detaching from the welding end. On the other hand, the connecting part is connected to the first surface, and / or the connecting part is connected to the second surface, so that the connecting part can support the reinforcing part to be positioned at a preset height, which is conducive to improving the positioning accuracy of the connection between the reinforcing part and the welding end.

[0012] In this solution, the winding includes a body, the first welding end and the second welding end extend out relative to the body along the axis direction of the stator, and there is a gap between the first reinforcing part and the body along the axis direction of the stator, and there is a gap between the second reinforcing part and the body along the axis direction of the stator.

[0013] In this solution, after the reinforcing part is welded to the welding end, the first surface and the second surface are connected to the connecting part, so that the reinforcing part can be positioned at a preset height. There is a preset gap between the end face of the first reinforcing part facing the body and the body, and there is a preset gap between the end face of the second reinforcing part facing the body and the body. Furthermore, there is no contact between the reinforcing part and the body, reducing the risk of interference between the reinforcing part and the body, and reducing the risk of over-positioning caused by the contact between the reinforcing part and the body, which is thus conducive to improving the positioning accuracy of the connection between the reinforcing part and the welding end.

[0014] In this solution, the cross-sectional shape of the reinforcing part is U-shaped.

[0015] In this solution, along the radial direction of the stator, the U-shaped reinforcing part can wrap around the outside of the welding end, enabling the reinforcing part to clamp the first welding end and the second welding end along the radial direction of the stator, reducing the risk of poor welding between the first welding end and the second welding end, and being conducive to improving the working reliability of the stator.

[0016] In this solution, the material of the reinforcing part is copper.

[0017] In this solution, when the material of the reinforcing part is copper, the contact resistance between the reinforcing part and the first welding end and the second welding end can be reduced. In addition, when the reinforcing part is made of copper, it has good ductility, corrosion resistance and relatively high tensile strength, which is conducive to improving the service life of the reinforcing part. At the same time, the copper material has good electrical conductivity and thermal conductivity, which is conducive to improving the working stability of the stator.

[0018] The second aspect of the present application provides a motor, which includes a rotor and a stator, and the stator is the stator described above. Wherein, the rotor passes through the stator and can rotate relative to the stator.

[0019] In this solution, the rotor is disposed through the through-hole of the iron core and can rotate relative to the iron core. The rotor is generally formed by laminating multiple silicon steel sheets, and a rotating shaft is disposed through the middle of the rotor. The rotating shaft can drive the rotor to rotate relative to the stator within the iron core. Since the height of the stator in the axial direction is appropriate, the size of the rotating shaft disposed through the rotor is appropriate, which is convenient for the arrangement of the rotating shaft, and further helps to reduce the volume and weight of the motor, realizing the lightweight of the vehicle.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the stator in a specific embodiment;

[0022] Figure 2 is a schematic structural diagram of the stator provided by the present application in a specific embodiment;

[0023] Figure 3 is a schematic structural diagram of the cooperation between the reinforcement member and the welding end provided by the present application;

[0024] Figure 4 is a schematic structural diagram of the reinforcement member provided by the present application.

[0025] Figure 5 is Figure 3 an enlarged view of a part of

[0026] Figure 6 is Figure 2 a cross-sectional view of the winding in

[0027] Figure 7 is Figure 2 a cross-sectional view of the winding in

[0028] Description of the Reference Numerals:

[0029] 1 - Stator;

[0030] 11 - Iron Core;

[0031] 12 - Winding;

[0032] 121 - Welding End;

[0033] 1211 - First Welding End;

[0034] 1211a - First End Face;

[0035] 1211b - Second End Face;

[0036] 1211c - First Surface;

[0037] 1212 - Second Welding End;

[0038] 1212a - Third end face;

[0039] 1212b - Fourth end face;

[0040] 1212c - Second surface;

[0041] 122 - Body;

[0042] 13 - Reinforcement;

[0043] 131 - Welding cavity;

[0044] 132 - First reinforcement part;

[0045] 133 - Second reinforcement part;

[0046] 134 - Connection part;

[0047] 135 - Opening.

[0048] The accompanying drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with this application, and are used together with the description to explain the principles of this application. Detailed implementation manners

[0049] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0050] In a specific embodiment, the present application will be further described in detail below through specific embodiments in combination with the accompanying drawings.

[0051] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0052] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms of "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0053] It should be understood that the term " / " used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0054] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described from the angles shown in the drawings, and should not be construed as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0055] As Figure 1 shown, the stator 1 generally includes a core 11 and a winding 12, and the winding 12 is wound around the core 11. The core 11 includes a plurality of stator slots arranged along the stator 1, and the winding 12 includes multiple layers of copper wires that pass through and connect between the plurality of stator slots. Each layer of copper wire includes a body 122 that penetrates into the stator slot and a welding section that extends along the axis direction of the stator 1 relative to the body 122. The two welding sections of adjacent copper wires are welded to form each welding end 121 of the winding 12, so that each phase wire can be connected in series. Usually, adjacent copper wires are only connected through one welding surface. In order to ensure the welding strength, it is often necessary to increase the height of the two welding sections along the axis direction of the stator 1, that is, to increase the height of the welding end 121 along the axis direction of the stator 1, thereby increasing the welding area of adjacent welding sections and improving the welding strength. However, the increase in the height of the welding end 121 results in an increase in the height of the stator 1 along the axis direction, which is not conducive to the spatial layout of the stator 1. For example, when the motor is used in an electric vehicle, it is easy to cause a larger shaft size of the electric vehicle.

[0056] Therefore, the embodiments of the present application provide a stator 1 to solve the above technical problems. As Figure 2 and Figure 3 shown, the stator 1 includes a core 11, a winding 12, and a reinforcing member 13. The winding 12 has a first welding end 1211 and a second welding end 1212 that extend out of the core 11. Among them, the first welding end 1211 and the second welding end 1212 can extend out of the core 11 along the axis direction of the stator 1. The first welding end 1211 and the second welding end 1212 are arranged opposite to each other along the radial direction of the stator 1 and are welded. As Figure 4 shown, the reinforcing member 13 includes a welding cavity 131. The first welding end 1211 and the second welding end 1212 extend into the welding cavity 131, and the reinforcing member 13 is welded to at least one of the first welding end 1211 and the second welding end 1212. That is, the reinforcing member 13 is welded to the first welding end 1211, or the reinforcing member 13 is welded to the second welding end 1212, or the reinforcing member 13 is welded to both the first welding end 1211 and the second welding end 1212.

[0057] In this embodiment, when the first welding end 1211 and the second welding end 1212 are welded, the reinforcing member 13 can be sleeved outside the first welding end 1211 and the second welding end 1212 and welded to at least one of them, so that in addition to direct welding, the first welding end 1211 and the second welding end 1212 are indirectly welded through the reinforcing member 13, which can increase the welding area between the first welding end 1211 and the second welding end 1212 and improve the welding strength of the first welding end 1211 and the second welding end 1212. In addition, in the embodiment of the present application, there is no need to increase the height of the first welding end 1211 and the second welding end 1212 in the axial direction to improve the welding strength. When the stator 1 has the same welding strength, by increasing the welding surface, the height of the welding end 121 in the axial direction of the stator 1 can be reduced, so that the height of the stator 1 in the axial direction is appropriate and the size of the stator 1 in the axial direction will not be too large, which is convenient for the arrangement of the rotating shaft in the vehicle.

[0058] For example, as Figure 1 shown, when the reinforcing member 13 is not provided, the height H1 of the welding end 121 of the stator 1 in the axial direction is 12 mm. When the reinforcing member 13 is added, under the condition of the same welding strength, the height of the welding end 121 is reduced to one-third of the original height, that is, as Figure 3 shown in the embodiment of the present application, the height H2 of the welding end 121 of the stator 1 is 4 mm, thereby effectively reducing the height of the welding end 121.

[0059] In a possible implementation manner, the winding 12 may include multiple layers of copper wires, such as 4 layers, 6 layers, 8 layers, etc., so that the motor can have different efficiencies according to actual needs. The present application does not limit the number of layers of the copper wires. In addition, as Figure 2 shown, reinforcing members 13 are welded to all the plurality of welding ends 121, so that the height of the side of the stator 1 provided with the welding ends 121 in the axial direction is consistent.

[0060] In a possible implementation manner, as Figure 5 shown, the reinforcing member 13 at least includes a first reinforcing portion 132, a second reinforcing portion 133 and a connecting portion 134. The connecting portion 134 connects the first reinforcing portion 132 and the second reinforcing portion 133. The first reinforcing portion 132 is welded to the first welding end 1211, and the second reinforcing portion 133 is welded to the second welding end 1212.

[0061] Therefore, by welding the first reinforcing part 132 to the first welding end 1211 and the second reinforcing part 133 to the second welding end 1212, in addition to the direct welding between the first welding end 1211 and the second welding end 1212, they are indirectly welded through the reinforcing member 13, and the reinforcing member 13 is welded to both the first welding end 1211 and the second welding end 1212, so that the welding strength between the reinforcing member 13 and the first welding end 1211 and the second welding end 1212 is relatively high, increasing the welding strength between the first welding end 1211 and the second welding end 1212, reducing the risk of poor welding of the welding end 121, and further reducing the risk of open circuit in the winding 12. At the same time, there is no need to increase the height of the first welding end 1211 and the second welding end 1212 along the axial direction to improve the welding strength.

[0062] In a possible implementation manner, as Figure 6 shown, the first welding end 1211 has a first end face 1211a and a second end face 1211b that are oppositely arranged along the radial direction of the stator 1, the second welding end 1212 has a third end face 1212a and a fourth end face 1212b that are oppositely arranged along the radial direction of the stator 1, the second end face 1211b is welded to the third end face 1212a, the first reinforcing part 132 is welded to the first end face 1211a, and the second reinforcing part 133 is welded to the fourth end face 1212b.

[0063] In this embodiment, the first end face 1211a, the second end face 1211b, the third end face 1212a, and the fourth end face 1212b are arranged in sequence along the radial direction of the stator 1. The second end face 1211b is welded to the third end face 1212a so that there is a first welding surface (direct welding) between the first welding end 1211 and the second welding end 1212. The inner wall of the first reinforcing part 132 facing the second reinforcing part 133 is connected to the first end face 1211a so that there is a second welding surface between the first welding end 1211 and the first reinforcing part 132. The inner wall of the second reinforcing part 133 facing the first reinforcing part 132 is welded to the second end face 1211b so that there is a third welding surface between the second welding end 1212 and the second reinforcing part 133. Furthermore, through the connecting part 134 connecting the first reinforcing part 132 and the second reinforcing part 133, the first welding end 1211 and the second welding end indirectly have three welding surfaces, namely, the first welding surface, the second welding surface, and the third welding surface arranged along the radial direction of the stator 1. Therefore, compared with the welding end 121 with only one welding surface as Figure 1 shown, there are at least three welding surfaces between the first welding end 1211 and the second welding end 1212 in this embodiment. Without making the welding end 121 have a high welding height, the welding strength between the first welding end 1211 and the second welding end 1212 can be increased, and then the welding height of the welding end 121 is moderate, which is convenient for the arrangement of the vehicle interior rotating shaft.

[0064] Among them, the outer periphery of the copper wire of the winding 12 is wrapped with an insulating layer, and the insulating layer is used to improve the working stability and service life of the winding 12. During the process of welding the copper wire, it is necessary to first strip the insulating layer at the position to be welded to form the above-mentioned first welding end 1211 and second welding end 1212, exposing the above-mentioned first end face 1211a, second end face 1211b, third end face 1212a and fourth end face 1212b, so that the first end face 1211a can be welded to the first reinforcing part 132, the second end face 1211b can be welded to the third end face 1212a, and the fourth end face 1212b can be welded to the second reinforcing part 133, so that the first welding end 1211, the second welding end 1212 and the reinforcing member 13 can be welded to each other in pairs.

[0065] As Figure 4 and Figure 6 shown, along the radial direction of the stator 1, the width dimension from the second end face 1211b to the first end face 1211a after stripping the insulating layer is W1 (i.e., the thickness of the first welding end 1211), the width dimension from the third end face 1212a to the fourth end face 1212b after stripping the insulating layer is W2 (i.e., the thickness of the second welding end 1212), and the width dimension of the welding cavity 131 is S. When the reinforcing member 13 is welded to the welding end 121, it should satisfy S = W1 + W2 + the thickness of the solder, that is, there is no gap between the first end face 1211a and the first reinforcing part 132, and there is no gap between the fourth end face 1212b and the second reinforcing part 133, so as to improve the connection strength of the reinforcing member 13 welded to the welding end 121.

[0066] In a possible implementation manner, as Figure 2 , Figure 6 and Figure 7 shown, along the axial direction of the stator 1, the first welding end 1211 has a first surface 1211c facing away from the iron core 11, the second welding end 1212 has a second surface 1212c facing away from the iron core 11, and the connecting portion 134 is welded to the first surface 1211c, and / or the connecting portion 134 is welded to the second surface 1212c. Specifically, the connecting portion 134 is welded to the first surface 1211c, that is, the connecting portion 134 is welded to the first welding end 1211; or, the connecting portion 134 is welded to the second surface 1212c, that is, the connecting portion 134 is welded to the second welding end 1212; or, the connecting portion 134 is welded to both the first surface 1211c and the second surface 1212c, that is, the connecting portion 134 is welded to both the first welding end 1211 and the second welding end 1212.

[0067] Therefore, on the basis of welding the first reinforcing portion 132 to the first welding end 1211 and the second reinforcing portion 133 to the second welding end 1212, welding the connecting portion 134 to the first surface 1211c and / or the connecting portion 134 to the second surface 1212c can further increase the welding surface between the reinforcing member 13 and the first welding end 1211 and the second welding end 1212, thereby indirectly increasing the welding surface of the first welding end 1211 and the second welding end 1212, which is beneficial to improving the connection reliability between the reinforcing member 13 and the welding end 121, and further reducing the risk of the reinforcing member 13 detaching from the welding end 121. On the other hand, connecting the connecting portion 134 to the first surface 1211c and / or the connecting portion 134 to the second surface 1212c enables the connecting portion 134 to support the positioning of the reinforcing member 13 at a preset height, which is beneficial to improving the positioning accuracy of the connection between the reinforcing member 13 and the welding end 121.

[0068] In a possible implementation manner, as Figure 4 and Figure 6 shown, the cross-sectional shape of the reinforcing member 13 is U-shaped. Therefore, along the radial direction of the stator 1, the U-shaped reinforcing member 13 can wrap around the outside of the welding end 121, enabling the reinforcing member 13 to clamp the first welding end 1211 and the second welding end 1212 along the radial direction of the stator 1, reducing the risk of poor welding between the first welding end 1211 and the second welding end 1212, and being beneficial to improving the working reliability of the stator 1. On the other hand, both sides of the U-shaped reinforcing member 13 have openings 135, which facilitate welding the reinforcing member 13 to the welding end 121, better meeting the actual welding requirements.

[0069] During welding, first, the first welding end 1211 needs to be welded to the second welding end 1212, that is, the second end face 1211b is welded to the third end face 1212a. Then, along the axial direction of the stator 1, the reinforcing member 13 is placed above the welding end 121, that is, the connecting portion 134 abuts against the first surface 1211c and the second surface 1212c. At this time, the welding end 121 is located within the welding cavity 131 of the reinforcing member 13. Subsequently, solder is filled through the opening 135, and then the first reinforcing portion 132 is welded to the first end face 1211a of the first welding end 1211, and the second reinforcing portion 133 is welded to the fourth end face 1212b of the second welding end 1212. Optionally, the connecting portion 134 can also be welded to the first surface 1211c and / or the connecting portion 134 can be welded to the second surface 1212c.

[0070] Among them, the welding method can be fusion welding, argon welding, brazing, etc. The present application does not limit the welding method of the reinforcing member 13 to the welding end 121.

[0071] In a possible implementation manner, as Figure 6 and Figure 7As shown, the winding 12 includes a body 122. The first welding end 1211 and the second welding end 1212 extend out relative to the body 122 along the axis direction of the stator 1. Along the axis direction of the stator 1, there is a gap between the first reinforcing part 132 and the body 122, and there is a gap between the second reinforcing part 133 and the body 122.

[0072] In this embodiment, after the reinforcing member 13 is welded to the welding end 121, the first surface 1211c and the second surface 1212c are connected to the connecting part 134, so that the reinforcing member 13 can be positioned at a preset height. There is a preset gap between the end face of the first reinforcing part 132 facing the body 122 and the body 122, and there is a preset gap between the end face of the second reinforcing part 133 facing the body 122 and the body 122. Furthermore, there is no contact between the reinforcing member 13 and the body 122, reducing the risk of interference between the reinforcing member 13 and the body 122, and reducing the risk of over-positioning caused by the contact between the reinforcing member 13 and the body 122, thus being beneficial to improving the positioning accuracy of the connection between the reinforcing member 13 and the welding end 121.

[0073] In a possible implementation manner, as Figure 7 shown, the gap t satisfies 1mm ≤ t ≤ 2mm. For example, along the axis direction of the stator 1, the gap t can be 1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2mm, etc.

[0074] Therefore, when t is too small, the distance between the first reinforcing part 132, the second reinforcing part 133 and the body 122 is too small. During the installation of the reinforcing member 13 on the welding end 121, there is still a risk that the reinforcing member 13 abuts against the body 122, which easily leads to over-positioning between the reinforcing member 13 and the welding end 121, and causes the risk of force deformation between the reinforcing member 13 and the welding end 121; when t is too large, the distance between the first reinforcing part 132, the second reinforcing part 133 and the body 122 is too large, making the height of the winding 12 along the axis direction of the stator 1 too large, resulting in too large a height of the stator 1, which is not conducive to the arrangement of the vehicle interior rotating shaft. At the same time, it causes waste of the winding 12 material and increases the production cost. In this embodiment, the gap t satisfies 1mm ≤ t ≤ 2mm. The distance between the first reinforcing part 132, the second reinforcing part 133 and the body 122 is appropriate, enabling a relatively high positioning accuracy between the reinforcing member 13 and the welding end 121. At the same time, it is convenient for the arrangement of the vehicle interior rotating shaft.

[0075] In a possible implementation manner, as Figure 4As shown, along the axial direction of the stator 1, the height L of the reinforcing member 13 satisfies 5.5 mm ≤ L ≤ 7.5 mm. In this embodiment, along the axial direction of the stator 1, the heights l1 of the first reinforcing portion 132 and the second reinforcing portion 133 in the reinforcing member 13 are the same, and the height of the connecting portion 134 is l2, satisfying l1 + l2 = L. Among them, l1 can be 4 mm ≤ l1 ≤ 5 mm, and l2 can be 1.5 mm ≤ l2 ≤ 2.5 mm.

[0076] Therefore, when l1 is too small, the welding areas between the first reinforcing portion 132 and the first welding end 1211, and between the second reinforcing portion 133 and the second welding end 1212 are small, reducing the welding strength between the reinforcing member 13 and the welding end 121. Or, when l2 is too small, since the connecting portion 134 is used to support the reinforcing member 13 at a preset height, that is, the connecting portion 134 is thin, there is a possibility that the connecting portion 134 breaks, and the structural stability of the reinforcing member 13 is poor; when l1 or l2 is too large, the height of the stator 1 along its axial direction is large, resulting in material waste and an increase in production cost. In summary, when L is too small, there is a risk of poor welding between the reinforcing member 13 and the welding end 121 and a risk that the reinforcing member 13 is prone to breakage. When L is too large, the height of the stator 1 is too large, easily causing material waste. In this embodiment, the height L of the reinforcing member 13 satisfies 5.5 mm ≤ L ≤ 7.5 mm. The height of the reinforcing member 13 is appropriate, making the welding strength between the reinforcing member 13 and the welding end 121 high. At the same time, the height of the stator 1 is appropriate, facilitating the arrangement of the rotating shaft in the vehicle.

[0077] For example, the height L of the reinforcing member 13 can be 5.5 mm, 5.6 mm, 5.8 mm, 6 mm, 6.2 mm, 6.4 mm, 6.5 mm, 6.6 mm, 6.8 mm, 7 mm, 7.2 mm, 7.4 mm, 7.5 mm, etc.

[0078] In a possible implementation manner, as Figure 3 and Figure 4 shown, the material of the reinforcing member 13 is copper, that is, the material of the reinforcing member 13 is the same as that of the welding end 121. When the material of the reinforcing member 13 is copper, the contact resistance between the reinforcing member 13 and the first welding end 1211 and the second welding end 1212 can be reduced. In addition, when the reinforcing member 13 is made of copper, it has good ductility, corrosion resistance, and high tensile strength, which is beneficial to improving the service life of the reinforcing member 13. At the same time, the copper material has good electrical conductivity and thermal conductivity, which is beneficial to improving the working stability of the stator 1.

[0079] This application also provides a motor. The motor includes a rotor (not shown in the figure) and a stator 1, and the stator 1 is the stator 1 in any of the above embodiments. Among them, the rotor passes through the stator 1 and can rotate relative to the stator 1.

[0080] The rotor is inserted into the through hole of the iron core 11 and can rotate relative to the iron core 11. Generally, the rotor is formed by punching and stacking multiple silicon steel sheets, and a rotating shaft is inserted through the middle of the rotor. The rotating shaft can drive the rotor to rotate relative to the stator 1 within the iron core 11. Since the height of the stator 1 in the axial direction is appropriate, the size of the rotating shaft inserted into the rotor is appropriate, which is convenient for the arrangement of the rotating shaft, further conducive to reducing the volume and weight of the motor, and realizing the lightweight of the vehicle.

[0081] Among them, the stator 1 provided by the embodiment of the present application is applicable to various rotor magnetic circuit structures such as permanent magnet rotors, asynchronous rotors, and electrically excited rotors.

[0082] The above is only the specific implementation manner of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the embodiment of the present application should be covered by the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be subject to the protection scope of the claimed rights.

Claims

1. A stator, characterized in that, The stator (1) includes: a core (11); a winding (12) wound around the core (11), the winding (12) having a first welding end (1211) and a second welding end (1212) extending out of the core (11), the first welding end (1211) and the second welding end (1212) being arranged opposite to each other in the radial direction of the stator (1) and welded; a reinforcing member (13), the reinforcing member (13) including a welding cavity (131), the first welding end (1211) and the second welding end (1212) extending into the welding cavity (131), and the reinforcing member (13) being welded to at least one of the first welding end (1211) and the second welding end (1212).

2. The stator according to claim 1, wherein The reinforcing member (13) at least includes a first reinforcing portion (132), a second reinforcing portion (133) and a connecting portion (134), the connecting portion (134) connecting the first reinforcing portion (132) and the second reinforcing portion (133), the first reinforcing portion (132) being welded to the first welding end (1211), and the second reinforcing portion (133) being welded to the second welding end (1212).

3. The stator according to claim 2, characterized in that, The first welding end (1211) has a first end face (1211a) and a second end face (1211b) arranged opposite to each other in the radial direction of the stator (1), the second welding end (1212) has a third end face (1212a) and a fourth end face (1212b) arranged opposite to each other in the radial direction of the stator (1), the second end face (1211b) is welded to the third end face (1212a), the first reinforcing portion (132) is welded to the first end face (1211a), and the second reinforcing portion (133) is welded to the fourth end face (1212b).

4. The stator according to claim 2, characterized in that, Along the axial direction of the stator (1), the first welding end (1211) has a first surface (1211c) facing away from the core (11), the second welding end (1212) has a second surface (1212c) facing away from the core (11), the connecting portion (134) is welded to the first surface (1211c), and / or the connecting portion (134) is welded to the second surface (1212c).

5. The stator according to any one of claims 2 - 4, characterized in that The winding (12) includes a body (122), the first welding end (1211) and the second welding end (1212) extend relative to the body (122) along the axial direction of the stator (1), along the axial direction of the stator (1), there is a gap between the first reinforcing portion (132) and the body (122), and there is a gap between the second reinforcing portion (133) and the body (122).

6. The stator according to any one of claims 1-4, characterized in that The cross-sectional shape of the reinforcing member (13) is U-shaped.

7. The stator according to any one of claims 1-4, characterized in that The material of the reinforcing member (13) is copper.

8. A motor, characterized in that, The motor includes: a rotor; a stator (1), the stator (1) being the stator (1) according to any one of claims 1-7; wherein, the rotor is disposed through the stator (1) and is capable of rotating relative to the stator (1).

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