Busbar, motor and vehicle

Abstract

The present invention provides a busbar, a motor and a vehicle. The busbar includes: a skeleton; a plurality of busbars, each busbar including an arc-shaped main body portion and a plurality of connecting portions, and all the busbars are divided into a neutral busbar and a plurality of phase busbars; a plurality of terminals respectively arranged on the plurality of phase busbars; wherein, the main body portions of the neutral busbar and the plurality of phase busbars are sequentially stacked and spaced apart along the axial direction of the skeleton, and the connecting portions of all the busbars are evenly distributed along the circumferential direction of the skeleton. The above solution facilitates the rapid assembly of the busbar and improves the production efficiency of the busbar.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a bus, a motor including the bus, and a vehicle including the motor. Background Art

[0002] The motor stator generally has multiple windings, each winding has two wiring terminals, a starting end and an ending end. The starting ends and ending ends of different windings need to be interconnected according to product requirements to ensure the normal operation of the motor. The wiring form is relatively complicated, which is not conducive to fast and efficient operation of the production line, and reduces the production efficiency of the product. Summary of the invention

[0003] In order to solve at least one of the above technical problems, an object of the present invention is to provide a busbar.

[0004] Another object of the present invention is to provide a motor comprising the above-mentioned busbar.

[0005] Another object of the present invention is to provide a vehicle including the above motor.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the first aspect of the present invention provides a busbar, comprising: a skeleton, which is an insulating member; a plurality of busbars, each of the busbars comprising an arc-shaped main body portion embedded in the skeleton and extending along the circumferential direction of the skeleton and a plurality of connecting portions connected to the main body portion and protruding outward from the skeleton, the plurality of connecting portions being evenly distributed along the circumference of the main body portion and used for connecting the terminal of the stator winding of the motor, and all the busbars are divided into a neutral busbar and a plurality of phase busbars; a plurality of terminals, which are distributed on the plurality of phase busbars and used for connecting a power source; wherein the main body portion of the neutral busbar and the main bodies of the plurality of phase busbars are sequentially stacked and spaced apart from each other along the axial direction of the skeleton, and the connecting portions of all the busbars are evenly distributed along the circumferential direction of the skeleton.

[0007] The bus provided by the technical solution of the first aspect of the present invention can utilize the connection parts of multiple busbars to connect the terminals of multiple windings of the motor stator, and utilize the good electrical conductivity of the busbar to realize the electrical connection of the corresponding terminals without directly connecting the corresponding terminals, thereby reducing the difficulty of wiring, facilitating efficient and fast operation of the production line, and helping to improve the production efficiency of the product. At the same time, the main body of the neutral busbar and the main body of the phase busbar are stacked and arranged one after another along the axial direction of the skeleton and are spaced apart from each other, and each phase busbar is rotated and staggered in the circumferential direction according to the set axial connection line angle, which is convenient for the rapid assembly of the busbar and improves the production efficiency of the busbar, and makes all the connection parts evenly distributed along the circumferential direction of the skeleton, corresponding to the terminals of multiple windings spaced circumferentially on the motor stator, and convenient for rapid wiring.

[0008] Specifically, the busbar includes a skeleton, multiple busbars and multiple terminals. The skeleton is an insulating part and can be formed by injection molding. It supports the multiple busbars and the multiple terminals and isolates adjacent busbars to perform electrical insulation. The multiple busbars are conductors. Each busbar includes a main body and multiple connecting parts. The multiple connecting parts of each busbar are used to connect the terminals that need to be connected together in the multiple windings of the electronic stator, and the electrical connection of these terminals is achieved through the main body to achieve the bus function. The multiple terminals are respectively arranged on multiple phase busbars, and each terminal is electrically connected to the terminal connected to the corresponding busbar. The multiple terminals are connected to the power supply to form an electrical circuit to supply power to the multiple windings of the motor stator. Among them, the main body is in the shape of an arc extending along the circumferential direction of the skeleton, and is not a complete ring. In this way, the circumferential length of the main body can be reduced on the basis of ensuring the same number of connecting parts, which is beneficial to saving raw materials and is easy to process and form, such as by bending and the like. At the same time, it also makes the busbar not a rotationally symmetrical structure, and the notch in the main body can be used as a reference to facilitate the positioning of the busbar during assembly.

[0009] Furthermore, all busbars are divided into neutral busbars and phase busbars. The circuit composed of the terminals connected to the phase busbars (such as the end of some windings) and the circuit composed of the terminals connected to the neutral busbars (such as the starting ends of all windings) can be connected in parallel to form a multi-phase circuit. Since all the connecting parts of the busbars are evenly distributed along the circumferential direction of the skeleton and correspond to the positions of multiple terminals of the motor stator, there is no need to reserve a long length for the terminals to ensure that they can extend to the positions of other terminals to connect with other terminals. This not only shortens the length of the terminals, but also effectively prevents the terminals from being entangled or confused during the wiring process, thereby reducing the difficulty of wiring.

[0010] Among them, the main parts of all bus bars are stacked along the axial direction of the skeleton, so the radial dimensions of multiple main parts can be kept consistent. It is only necessary to arrange multiple bus bars connected with terminals together in a set stacking manner to ensure that all connecting parts are evenly distributed along the circumferential direction of the skeleton and the positions of multiple terminals are correct. Then, the skeleton can be processed by one-piece injection molding. The processing technology is relatively simple and the structure of the skeleton is also relatively simple.

[0011] In addition, the bus in the above technical solution provided by the present invention may also have the following additional technical features:

[0012] In the above technical solution, the multiple connection parts of each of the busbars are sequentially recorded as the xth connection part along the same rotation direction starting from the notch of the main body, and the multiple phase busbars are sequentially recorded as the yth phase busbar along the axial direction of the skeleton, and the first phase busbar is arranged adjacent to the neutral busbar; the angle α between the first connection part of the neutral busbar and the axis connection line of the adjacent first phase busbar, the angle α between the first connection part of the first phase busbar and the axis connection line of the first connection part of the first phase busbar, and the angle α between the first connection part of the first phase busbar and the axis connection line of the first phase busbar are respectively recorded as the xth connection part of the first phase busbar and the yth connection part of the first phase busbar. The axial line angle β between the first connecting part and the first connecting part of the adjacent second phase bus bar satisfies: α=360° / (2×m×n)+360°×K / (m×n), β=360°×P / (m×n) and β≠360°×Q / n, m is the number of the phase bus bars, n is the number of stator windings per phase, K∈[0,(m×n-1)], P∈(0,(m×n-1)], Q∈[1,m].

[0013] The multiple connection parts of each busbar are recorded as the xth connection part in sequence along the same rotation direction starting from the notch of the main part, for example, counting from the notch of the main part in the clockwise direction, they are the first connection part, the second connection part, the third connection part, and so on; the multiple phase busbars are recorded as the yth phase busbar in sequence along the axial direction of the skeleton, and the first phase busbar is arranged in phase with the neutral busbar, that is, counting from the phase busbar closest to the neutral busbar axially, they are the first phase busbar, the second phase busbar, and so on.

[0014] Specifically, when stacking, first use the neutral busbar as a reference, and stack the phase busbars one by one. When stacking the first phase busbar, an axial angle of α is generated between its first connection part and the first connection part of the neutral busbar; then stack the second phase busbar, so that an axial angle of β is generated between its first connection part and the first connection part of the first phase busbar. At this time, the multiple connection parts of the first phase busbar and the multiple connection parts of the second phase busbar respectively occupy the circumferential gaps between several adjacent connection parts of the neutral busbar. For the scheme with a third phase busbar or even more phase busbars, there are still a few remaining connection parts of the neutral busbar with large circumferential gaps, which is manifested as some parts of the circumferential connection parts of the busbar are relatively concentrated, and some are relatively dispersed. Therefore, the remaining phase buses only need to have their connection parts distributed in these circumferential gaps to ensure that all connection parts are evenly distributed along the circumferential direction of the skeleton after assembly. Since the phase busbar has relatively fewer terminals connected and the neutral busbar has relatively more terminals connected, the number of connecting parts of the phase busbar is also less than the number of connecting parts of the neutral busbar. Therefore, it is easier to accurately control the rotation of the phase busbar, reducing the probability of visual confusion and helping to improve assembly efficiency.

[0015] Among them, α=360° / (2×m×n)+360°×K / (m×n), β=360°×P / (m×n) and β≠360°×Q / n. m×n is the number of slots of the stator to which the busbar is adapted, that is, the total number of coil windings, 360° / (2×m×n) is half of the angle between the axes of two adjacent connecting parts of the neutral busbar, 360°×K / (m×n) and 360°×P / (m×n) are integer multiples of the angle between the axes of two adjacent connecting parts of the neutral busbar, 360° / n is half of the angle between the axes of two adjacent connecting parts of the phase busbar, and 360°×Q / n is an integer multiple of the angle between the axes of two adjacent connecting parts of the phase busbar. In this way, when the axial connection angle between the first connection part of the neutral bus bar and the first connection part of the first phase bus bar is α, it indicates that the first connection part of the first phase bus bar is located between any two adjacent connection parts of the neutral bus bar, and then the first connection part of the second phase bus bar is rotated by β relative to the first connection part of the first phase bus bar, which not only ensures that each connection part of the second phase bus bar is located between two adjacent connection parts of the neutral bus bar, but also avoids overlapping with part of the connection part of the first phase bus bar in the circumferential direction, thereby ensuring that the connection part of the neutral bus bar, the connection part of the first phase bus bar, and the connection part of the second phase bus bar are staggered with each other in the circumferential direction.

[0016] It is worth noting that the axis-connected line angle between the two connecting parts refers to the angle between the center of one connecting part and the perpendicular line of the central axis of the frame, and the angle between the center of the other connecting part and the perpendicular line of the central axis of the frame. The center of the connecting part refers to the center of the part of the connecting part corresponding to the terminal of the stator winding, that is, in the projection on the plane perpendicular to the central axis of the bus, the center of the connecting part coincides with the terminal of the stator winding. For all solutions with the same shape and size of the connecting parts, the axis-connected line angle between the two connecting parts refers to the angle between the same part of the two connecting parts and the perpendicular line of the central axis of the frame.

[0017] In the above technical solution, m is 3.

[0018] If m is 3, the number of busbars is four and the number of terminals is three. A three-phase motor can be formed by reasonable connection. Three of the busbars are phase busbars, which are connected to an equal number of terminals to form U-phase busbar, V-phase busbar and W-phase busbar respectively. The other busbar is a neutral busbar, which is connected to the other terminal of all windings. The first phase busbar adjacent to the neutral busbar is defined as the W-phase busbar, followed by the V-phase busbar and the U-phase busbar. After the neutral busbar, the W-phase busbar and the V-phase busbar are stacked, there are exactly n gaps left in the neutral busbar, corresponding to the n connecting parts of the U-phase busbar. Therefore, the n connecting parts of the U-phase busbar can be placed in the corresponding gap positions.

[0019] In the above technical solution, the axis connection line angle γ between the first connection portion of the second phase bus bar and the first connection portion of the third phase bus bar satisfies: γ=360°×P / (m×n) and γ≠360°×Q / n.

[0020] The axis angle between the first connection portion of the second phase busbar and the first connection portion of the third phase busbar is γ. Since γ=360°×P / (m×n) and γ≠360°×Q / n, γ=β, and the process of stacking the third phase busbar is the same as that of stacking the second phase busbar, which is conducive to further improving production efficiency. For example: β=γ=30°, or β=γ=120°.

[0021] In any of the above technical solutions, K is 0.

[0022] When K=0, α=360° / (2×m×n), and the first connection of the first phase busbar is located exactly between the first two connections of the neutral busbar. In this way, the value of α is smaller, which is beneficial to further reduce the difficulty of busbar assembly and further improve production efficiency.

[0023] In any of the above technical solutions, P and n satisfy: P=n.

[0024] P=n, then β=360° / m and β≠360°×Q / n, which simplifies the calculation method of β, helps to further reduce the difficulty of busbar assembly, and helps to further improve production efficiency.

[0025] In any of the above technical solutions, n is 4.

[0026] n is 4, that is, the number of stator windings per phase is 4. Of course, n is not limited to 4, and may also be 1, 2, 3, 5 or other values.

[0027] In any of the above technical solutions, the first connecting portion and the last connecting portion of each of the busbars are located at two ends of the main body.

[0028] Multiple connecting parts are evenly distributed along the circumferential direction of the main body, so that the structure of the busbar is relatively regular, which is convenient for processing and forming, and all the connecting parts of the busbar after assembly are evenly distributed along the circumference. Since the terminal of the motor stator winding is generally evenly distributed along the circumference, a one-to-one correspondence is maintained. At the same time, the first connecting part and the last connecting part are located at both ends of the main body, that is, the main body just lacks a part between the two connecting parts, which not only ensures the connection reliability between the main body and the multiple connecting parts, but also shortens the length of the main body as much as possible, which is conducive to further saving raw materials. For example: when the number of connecting parts is 4, the curvature of the main body is 270°, when the number of connecting parts is 6, the curvature of the main body is 300°, and when the number of connecting parts is 12, the curvature of the main body is 330°. In addition, the scheme also makes the two connecting parts (i.e., the first connecting part and the last connecting part) at both ends of the main body clearly distinguished from the connecting parts of other parts, and can be used as a reference when stacking multiple busbars to further improve the stacking efficiency, thereby further improving the assembly efficiency. Of course, the two ends of the main body can also be appropriately extended.

[0029] In any of the above technical solutions, the number of connection parts of each phase bus bar is n, and each terminal is connected to the xth connection part of the corresponding phase bus bar, where x∈[2, n-1].

[0030] Multiple terminals correspond to multiple phase busbars one by one. The number of connection parts of each phase busbar is n, and the n connection parts are respectively connected to the n coils of each phase stator. Each terminal is connected to the xth connection part of the corresponding phase busbar. Since x is greater than or equal to 2 and less than or equal to n-1, the connection part of the connection terminal is not the connection part located on both sides of the notch of the main body. Compared with the two ends of the main body, the strength of other parts of the main body is relatively higher, and the probability of deformation is relatively low. Therefore, connecting the terminal to the connection part of the main body of the phase busbar away from the notch is conducive to further improving the position and verticality of the terminal, and further reducing the probability of deformation of the terminal.

[0031] In the above technical solution, x is 2.

[0032] If x is 2, the terminal is connected to the second connection portion of the corresponding phase bus bar, so that the first connection portion of the phase bus bar is used as a reference for locating the position of the phase bus bar, and the second connection portion is used to connect the terminal, which is easy to find and is conducive to further improving production efficiency. Of course, x is not limited to 2, and can also be other values.

[0033] In any of the above technical solutions, the thicknesses t of all the main body parts are equal; and / or the intervals t2 between adjacent main body parts are equal.

[0034] If all the main bodies have the same thickness, all the busbars can be made of the same material, which is beneficial to reducing the types of raw materials, facilitating processing and molding, and saving costs. Optionally, the thickness of the main body is in the range of 0.7 mm-1.0 mm (such as 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.).

[0035] The spacing between adjacent main parts is equal, so that the internal structure of the busbar is regular and the electrical insulation between the busbars is ensured. Optionally, the spacing between adjacent main parts is 0.5mm-3mm (such as 0.5mm, 1mm, 2mm, 3mm, etc.).

[0036] In any of the above technical solutions, the widths of all the main parts are equal; and / or the main parts of all the phase bus bars are the same; and / or in the projection on a plane perpendicular to the axis of the skeleton, the main parts of all the bus bars overlap with each other to form a ring.

[0037] The widths of all the main bodies are equal, that is, the dimensions of all the main bodies along the radial direction of the skeleton are equal. In this way, after the main bodies of all the bus bars are stacked along the axial direction of the skeleton, the inner edges of all the main bodies are located on the same circle, and the outer edges of all the main bodies are also located on the same circle, so that the structure of the bus is more regular, which is convenient for the processing and forming of each bus bar and the processing and forming of the skeleton.

[0038] The main bodies of all phase bus bars are the same, that is, the shapes and sizes are completely consistent, which is conducive to reducing the processing difficulty of the phase bus bars and improving production efficiency.

[0039] In the projection on the plane perpendicular to the axis of the frame, the main parts of all the busbars overlap to form a ring, that is, the projections of the main parts of all the busbars on the plane perpendicular to the axis of the frame are located in the same ring. Since each main part has a notch, its projection is not a complete ring, and the projections of multiple main parts are superimposed to form a complete ring, which is conducive to improving the strength of the busbar and facilitating the rotational dislocation of the busbars, ensuring that all the connecting parts are evenly distributed along the circumferential direction of the frame.

[0040] In any of the above technical solutions, end surfaces of the connection portions of all the busbars away from the stator windings are kept flush in the axial direction of the skeleton.

[0041] The end faces of all the connections away from the stator windings are kept flush in the axial direction of the skeleton (that is, the end faces of all the connections away from the stator windings are located on the same plane perpendicular to the central axis of the skeleton). Since the wire ends higher than the connections are subtracted when cutting the wires, the connection terminals of all the windings can also be kept flush, and the same length is reserved. After welding, the excess wire ends are cut off at the same position, achieving high consistency in wiring operations, which is convenient for both manual and machine operations, and is therefore beneficial to significantly improve the production efficiency of the production line.

[0042] In other words, if the end faces of all the connections away from the stator windings remain flush in the axial direction of the skeleton, the terminals of the multiple windings of the motor stator can maintain consistent shape and size, which is convenient for controlling the paint stripping position of each terminal, welding the terminals and the connections on the production line, and cutting off excess wire ends after welding, thereby significantly improving production efficiency, shortening production cycles, and improving product consistency.

[0043] In the above technical solution, the end surfaces of the connection parts of all the busbars close to the stator windings are kept flush in the axial direction of the skeleton, so that all the connection parts are kept flush in the axial direction of the skeleton.

[0044] The end faces of all busbar connections close to the stator windings are also kept flush in the axial direction of the frame (i.e., the end faces of all connections close to the stator windings are located on the same plane perpendicular to the central axis of the frame), so that all connections are kept flush in the axial direction of the frame. In this way, the paint coating on the outside of the enameled wire can be peeled off at the same position for welding during the wiring process, further improving the consistency of the wiring operation. At the same time, all connections can be made of the same shape, which improves the regularity and consistency of the product and facilitates processing and molding.

[0045] In the above technical solution, the main body of the neutral bus bar is arranged at a position facing the winding.

[0046] Since the number of terminals connected to the phase busbars is relatively small, and the number of terminals connected to the neutral busbars is relatively large, and thus the number of connecting parts of the phase busbars is also less than the number of connecting parts of the neutral busbars, the main parts of the multiple phase busbars are arranged adjacent to each other in sequence, and it is only necessary to change the axial position of the connecting parts of the phase busbars so that their connecting parts are flush with the axial position of the neutral busbars, without changing the axial position of the connecting parts of the neutral busbars, which is conducive to reducing the difficulty of processing and improving production efficiency. If the main part of the neutral busbar is arranged in a position facing the winding, the connecting part of the phase busbar can be offset to a position close to the winding, which is conducive to shortening the distance between the terminal and the connecting part, thereby shortening the length of the terminal and reducing the difficulty of welding the terminal.

[0047] In the above technical solution, at least part of the busbars also include an extension portion, which is located between the outer periphery of the main body and the connecting portion, and is used to connect the main body and the connecting portion, and the extension portion at least partially extends along the axial direction of the skeleton, so that all the connecting portions remain flush in the axial direction of the skeleton.

[0048] At least part of the busbars include an extension portion, and the two ends of the extension portion are respectively connected to the main body and the connection portion. Since the extension portion at least partially extends along the axial direction of the skeleton, the extension portion can easily achieve the flushness of multiple connection portions in the axial direction of the skeleton, and it is convenient to reasonably design the shape and size of the connection portion according to needs, which is conducive to optimizing the structure of the product. Among them, only part of the busbars may include an extension portion, and the extension portion is used to make its connection portion flush with the extension portion of other busbars without an extension portion; or all busbars may include an extension portion, and the extension portion of the busbar does not need to extend in different sizes along the axial direction, so that all connection portions are kept flush in the axial direction. Of course, the busbar may also have no extension portion, and the flushness of all connection portions in the axial direction of the skeleton can be achieved directly by the specific connection position of the connection portion and the main body and the reasonable design of the shape and size of the connection portion.

[0049] In the above technical solution, the extension portion is embedded in the frame.

[0050] The extension part is embedded in the frame, and only the connecting part is exposed from the frame. In this way, the appearance structure of the bus is relatively regular, and the frame can provide good support for the extension part to prevent the extension part from deformation or shaking, thereby improving the stability of the position of each connecting part, which is beneficial to production line operation and further improves production efficiency.

[0051] In any of the above technical solutions, optionally, the plurality of terminals are evenly arranged along the circumferential direction of the busbar; or, the plurality of terminals are unevenly arranged along the circumferential direction of the busbar.

[0052] Multiple terminals are evenly distributed along the circumferential direction of the busbar, and the structure is relatively regular, which is conducive to increasing the distance between terminals, ensuring the electrical insulation between the terminals, and meeting the customer's requirement for the terminals to be evenly distributed along the circumference. Alternatively, multiple terminals are unevenly arranged along the circumferential direction of the busbar, such as being concentrated in one area of ​​the busbar, to meet the customer's requirement for the terminals to be unevenly distributed along the circumference.

[0053] In any of the above technical solutions, the connection portion is provided with a limiting groove adapted to the wiring terminal, the limiting groove is for the wiring terminal to pass through and is suitable for being connected to the wiring terminal by welding.

[0054] The connection part is provided with a limiting groove. During the wiring operation, the terminal is passed through the limiting groove, and then the welding operation is performed. The limiting groove can not only play a good limiting role for the terminal to prevent the terminal from shaking and tilting, but also help to increase the contact area between the terminal and the connection part, thereby reducing the difficulty of welding and helping to further improve production efficiency.

[0055] In the above technical solution, the connecting part includes a connecting piece and a bending piece, the connecting piece is connected to the main body and extends along the circumferential direction of the skeleton, the bending piece is connected to the connecting piece and bends and extends, and forms a U-shaped limiting groove with the connecting piece.

[0056] The connecting part includes a connecting piece and a bending piece, and the connecting piece and the bending piece surround a U-shaped limiting groove so that the limiting groove forms a structure with openings at both axial ends and notches in the circumferential direction (that is, the projection of the limiting groove on the axial end face of the skeleton is U-shaped). This is conducive to increasing the space of the limiting groove, facilitating the rapid passage of the wiring terminal, and is also conducive to increasing the space for welding operations and reducing the difficulty of welding operations.

[0057] In the above technical solution, the thickness direction of the connecting piece and the thickness direction of the bending piece are perpendicular to the axial direction of the frame.

[0058] The thickness directions of the connecting piece and the bending piece are both perpendicular to the axial direction of the frame, which increases the depth of the limiting groove and helps to increase the contact area between the limiting groove and the terminal, thereby further reducing the difficulty of welding and improving the strength of the welding connection.

[0059] In the above technical solution, the U-shaped openings of all the limiting grooves face the same rotation direction.

[0060] The U-shaped openings of all the limit slots face the same rotation direction, for example, all are clockwise or counterclockwise, so that the structure of the bus is more regular, which is convenient for the processing and forming of each bus bar, and is also beneficial for the appropriate rotation of the bus during production line operation so that all the terminal ends pass through the limit slots synchronously, thereby further improving production efficiency.

[0061] In the above technical solution, the dimension of the connecting piece along the circumferential direction of the frame is greater than the dimension of the bending piece and its opposite portion along the circumferential direction of the frame.

[0062] If the dimension of the connecting piece along the circumferential direction of the skeleton is larger than the dimension of the part of the bending piece opposite to the connecting piece along the circumferential direction of the skeleton, the connecting piece and the bending piece form a J-shaped structure, which facilitates the reasonable setting of the position of the limit groove and provides a more favorable operating space for the welding operation of the terminal.

[0063] In any of the above technical solutions, the connecting portion further includes an extension piece extending in the radial direction of the skeleton, the radial inner end of the extension piece is connected to the main body, and the radial outer end of the extension piece is connected to the portion of the connecting portion used to connect the terminal.

[0064] The connecting part also includes an extension piece, which extends in the radial direction of the skeleton, and its radial inner and outer ends are respectively connected to the main body and the part of the connecting part used to connect the terminal (such as the connecting piece in the aforementioned technical solution). This increases the radial distance between the part of the connecting part used to connect the terminal and the main body, which is beneficial to reducing the radial size of the main body to reduce production costs, and is beneficial to increasing the distance between adjacent connecting parts, thereby facilitating the reasonable design of the shape and size of the connecting part and further optimizing the product structure.

[0065] In the above technical solution, the busbar connected to the terminal is connected to the terminal through an extension piece of one of the connecting parts.

[0066] For a busbar connected to a terminal, the busbar is connected to the terminal via an extension piece of one of the connecting parts, so that no additional structure is needed on the busbar to connect the terminal, thereby simplifying the structure of the busbar and not causing the radial dimension of the busbar to increase.

[0067] In the above technical solution, the extension piece is perpendicular to the axial direction of the skeleton, the terminal is sheet-shaped, and the dimension a0 of the extension piece connected to the terminal along the thickness direction of the terminal is larger than the dimension a of other extension pieces of the same busbar along the thickness direction of the terminal.

[0068] The extension piece is perpendicular to the axial direction of the frame, which is beneficial to reducing the axial size of the busbar. The dimension a0 of the extension piece connected to the terminal along the thickness direction of the terminal is greater than the dimension a of other extension pieces on the same busbar along the thickness direction of the terminal, which is beneficial to increase the contact area between the extension piece and the terminal, thereby improving the connection strength and stability of the terminal and reducing the probability of deformation of the terminal.

[0069] In the above technical solution, the terminal is bent into an L-shape, including an extension section parallel to the axial direction of the frame and a connection section parallel to the extension piece, and the connection section is welded to the extension piece.

[0070] The terminal is bent and arranged, and includes an extension section and a connecting section. The extension section extends along the axial direction of the frame for connecting to a power source. The connecting section is parallel to the extension piece and is welded to the extension piece. This increases the contact area between the terminal and the extension piece, thereby improving the connection strength and stability of the terminal and reducing the probability of deformation of the terminal.

[0071] In the above technical solution, the dimension b0 of the portion for connecting the terminal corresponding to the extension piece connected to the terminal along the circumferential direction of the skeleton is greater than the dimension b of other portions for connecting the terminal on the same busbar along the circumferential direction of the skeleton.

[0072] The size of the portion for connecting the terminal corresponding to the extension piece connected to the terminal along the circumferential direction of the skeleton is appropriately increased relative to the size of other portions on the busbar for connecting the terminal along the circumferential direction of the skeleton. The circumferential distance between the terminal and the portion of the connecting part for connecting the terminal can be increased, thereby providing avoidance space and facilitating the welding operation of the terminal.

[0073] In any of the above technical solutions, both ends of the connecting portions of all the bus bars along the axial direction of the frame do not protrude from the planes where the two axial end surfaces of the frame are located.

[0074] The two ends of all the connecting parts along the axial direction of the skeleton do not protrude beyond the plane where the two axial end surfaces of the skeleton are located. Compared with the connecting parts protruding from the two axial end surfaces of the skeleton, the axial height of the bus can be reduced, so that the space occupied by the bus in the axial direction is less, which is beneficial to reduce the axial length of the motor and optimize the structure of the motor.

[0075] In any of the above technical solutions, the skeleton includes an annular bracket and a plurality of strip-shaped brackets integrally connected to the annular bracket, the main bodies of all the bus bars are embedded in the annular bracket, the plurality of strip-shaped brackets correspond one-to-one with the plurality of terminals, and a portion of each of the terminals is embedded in the corresponding strip-shaped bracket.

[0076] The skeleton includes an annular bracket and a strip bracket. The annular bracket is used to support multiple bus bars and ensure the insulation between the multiple bus bars. The multiple strip brackets are used to support multiple terminals and ensure the electrical insulation between the terminals and other structures. Since the annular bracket and the multiple strip brackets are connected in one piece, they can be formed into an integrated structure by integrally molding during the injection molding process, so the connection is more reliable. Compared with the solution in the prior art of separately molding insulating parts and then sleeved on the terminals, the strip bracket of this solution can play a good supporting and limiting role for the terminals, effectively preventing the terminals from shaking and deforming, ensuring the good positioning and verticality of the terminals, and a solid structure, so that when the controller PIN is inserted into the terminal, the part of the terminal exposed to the strip bracket is not prone to deformation and failure.

[0077] In the above technical solution, the dimension c of the strip-shaped bracket along the axial direction of the frame is greater than or equal to half of the dimension c0 of the terminal along the axial direction of the frame.

[0078] If the dimension c of the strip bracket along the axial direction of the skeleton is greater than or equal to half of the dimension c0 of the terminal along the axial direction of the skeleton, then the range of the terminal wrapped by the strip skeleton exceeds half of the terminal, thereby significantly improving the supporting and limiting effects on the terminal, effectively ensuring the stability and reliability of the terminal.

[0079] In the above technical solution, the terminal is connected to one of the connecting parts of the corresponding busbar, and in the projection of the plane perpendicular to the central axis of the skeleton, the strip-shaped bracket is asymmetrically arranged about the terminal in the thickness direction of the terminal, and the dimension d1 of the part close to the corresponding connecting part for connecting the terminal is smaller than the dimension d2 of the part far from the corresponding connecting part for connecting the terminal.

[0080] The terminal is connected to one of the connecting parts of the corresponding busbar, and the terminal is close to the part of the connecting part used to connect the terminal. The strip bracket circumferentially wraps the terminal, which may interfere with the welding operation of the terminal. Therefore, the strip bracket is arranged asymmetrically, and the part close to the above-mentioned part connecting the terminal is relatively thin, and the part away from the above-mentioned part connecting the terminal is relatively thick. This not only ensures reliable support for the terminal, but also avoids the part of the connecting part used to connect the terminal, reserves space for the welding operation of the terminal, and helps to reduce the difficulty of the welding operation.

[0081] In the above technical solution, a dimension d of one of the strip-shaped supports along the thickness direction of the terminal is different from a dimension d of the other strip-shaped supports along the thickness direction of the terminal.

[0082] The dimension of one of the strip brackets along the thickness direction of the terminal is different from the dimension of the other strip brackets along the thickness direction of the terminal, so that the three strip brackets are not completely consistent in appearance, which can play a role in preventing mistakes in assembly, facilitate rapid identification of each bus bar, and then locate the relative position between the bus bar and the stator winding, which is conducive to further improving production efficiency.

[0083] In any of the above technical solutions, the projection of the terminal on the axial end face of the skeleton is in the shape of a long strip, and the length direction of the projection extends along the radial direction of the skeleton; or, the projection of the terminal on the axial end face of the skeleton is in the shape of a long strip, and the length direction of the projection extends along the circumferential direction of the skeleton.

[0084] The projection of the terminal on the axial end face of the skeleton is in the shape of an elongated strip. Since the terminal is generally in the shape of an elongated thin sheet and extends along the axial direction of the skeleton, the projection of the terminal on the axial end face of the skeleton is basically the same as the shape of the cross section of the terminal. The length direction of the projection extends along the radial direction of the skeleton, which reasonably utilizes the radial space of the busbar and can meet the customer's requirements for radial arrangement of the terminal. Alternatively, the length direction of the projection can also extend along the circumferential direction of the skeleton, which reasonably utilizes the circumferential space of the busbar and can meet the customer's requirements for circumferential arrangement of the terminal, and is conducive to reducing the radial size of the busbar.

[0085] In any of the above technical solutions, a hook is provided on the surface of the frame away from the terminal for hooking the motor stator.

[0086] A hook is provided on the surface of the frame away from the terminal to facilitate the engagement with the stator and prevent the busbar from shaking, tilting, shifting, etc. during welding, which is beneficial to further improve production efficiency.

[0087] The technical solution of the second aspect of the present invention provides a motor, comprising: a motor body, including a stator, the stator is provided with a winding, the winding has two terminal terminals; and a bus as described in any one of the technical solutions of the first aspect, the connecting part of the bus is connected to the terminal.

[0088] The motor provided by the technical solution of the second aspect of the present invention includes the bus described in any one of the technical solutions of the first aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0089] In the above technical solution, the number of the windings is 12, and the 12 windings are connected in a star connection manner.

[0090] If the number of windings is 12, then the number of slots in the stator is also 12, and the phase difference between one of the phase busbars and the neutral busbar is 15°. Since the 12 windings have 24 joints and a star connection is adopted, the 12 wire ends at the starting ends of the 12 windings need to be connected together, and the end ends of windings 1, 4, 7, 10, the end ends of windings 2, 5, 8, 11, and the end ends of windings 3, 6, 9, and 12 are connected together respectively, so the wiring method is very complicated. The scheme of the present application can effectively reduce the wiring difficulty, and the wiring method is simple and reliable. Of course, the number of windings is not limited to 12, it can also be 9, 15, etc.; the connection method of the windings is not limited to the above method, it can also be a triangle connection or other methods.

[0091] The technical solution of the third aspect of the present invention provides a vehicle, comprising: a vehicle body; and a motor as described in any one of the technical solutions of the second aspect, installed in the vehicle body.

[0092] The vehicle provided by the technical solution of the third aspect of the present invention includes the motor described in the technical solution of the second aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0093] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0094] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0095] Figure 1 is a schematic structural diagram of a U-phase bus bar according to some embodiments of the present invention;

[0096] Figure 2 yes Figure 1 A schematic diagram of the top view of the U-phase busbar shown;

[0097] Figure 3 yes Figure 2 A schematic cross-sectional structure diagram of a U-phase bus bar is shown;

[0098] Figure 4 is a schematic structural diagram of a V-phase bus bar according to some embodiments of the present invention;

[0099] Figure 5 yes Figure 4 A schematic diagram of the top view of the V-phase busbar shown;

[0100] Figure 6 yes Figure 5A schematic cross-sectional structure diagram of a V-phase bus bar is shown;

[0101] Figure 7 is a schematic structural diagram of a W-phase bus bar according to some embodiments of the present invention;

[0102] Figure 8 yes Figure 7 A schematic diagram of the top view of the W-phase busbar shown;

[0103] Fig. 9 yes Figure 8 A schematic cross-sectional structure diagram of a W-phase bus bar is shown;

[0104] Fig.10 is a schematic diagram of a top view of the structure after the phase busbars and terminals are connected according to some embodiments of the present invention;

[0105] Fig.11 yes Fig.10 Schematic diagram of the cross-sectional structure along the AA direction;

[0106] Fig.12 yes Fig.10 A schematic front view of the structure shown;

[0107] Fig.13 is a schematic diagram of a three-dimensional structure of a neutral bus bar according to some embodiments of the present invention;

[0108] Fig.14 yes Fig.13 A schematic diagram of the top view of the neutral bus bar shown;

[0109] Fig.15 yes Fig.14 Schematic diagram of the cross-sectional structure along the middle BB direction;

[0110] Fig.16 is a schematic diagram of the assembly of a neutral bus bar, a W-phase bus bar and a corresponding terminal according to some embodiments of the present invention;

[0111] Fig.17 yes Fig.16 is a schematic diagram of the assembly of a neutral bus bar, a W-phase bus bar, a V-phase bus bar and two corresponding terminals according to some embodiments of the present invention;

[0112] Fig.18 It is a schematic diagram of the assembly of the neutral bus bar, the W-phase bus bar, the V-phase bus bar, the U-phase bus bar and the corresponding three terminals according to some embodiments of the present invention;

[0113] Fig.19 is a schematic diagram of the main structure of a bus bar according to some embodiments of the present invention;

[0114] Fig. 20is a schematic diagram of a top view of a busbar according to some embodiments of the present invention;

[0115] Fig.21 yes Fig. 20 Schematic diagram of the cross-sectional structure in the CC direction;

[0116] Fig. 22 yes Fig. 20 A combined diagram of a cross-sectional structural diagram in the CC direction and a partial cross-sectional structural diagram of another part of the busbar;

[0117] Fig.23 yes Fig. 20 Schematic diagram of the cross-sectional structure in the middle DD direction;

[0118] Fig.24 is a partial top view of the structure of the motor according to some embodiments of the present invention;

[0119] Fig.25 yes Fig.24 Schematic diagram of the cross-sectional structure along the EE direction;

[0120] Fig.26 is a schematic diagram of the distribution of the motor stator windings and the connection terminals according to some embodiments of the present invention;

[0121] Fig. 27 yes Fig.26 The winding connection diagram of the motor shown;

[0122] Fig.28 yes Fig.26 Schematic diagram of the circuit connection of the motor shown.

[0123] in, Figures 1 to 26 The corresponding relationship between the reference numerals and component names in the figure is:

[0124] 1 skeleton, 11 annular bracket, 12 strip bracket, 13 hook, 2 bus bar, 21 main body, 211 first end, 212 second end, 22 connecting part, 221 extension piece, 222 connecting piece, 223 bending piece, 23 extension part, 24 neutral bus bar, 251U phase bus bar, 252V phase bus bar, 253W phase bus bar, 26 limiting groove, 3 terminal, 31 extension section, 32 connecting section, 4 motor body, 41 terminal, 42 stator. DETAILED DESCRIPTION

[0125] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0126] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0127] Refer to the following Figures 1 to 28 A busbar and a motor according to some embodiments of the present invention are described.

[0128] First, an embodiment of the first aspect is introduced, specifically a bus.

[0129] Embodiment 1

[0130] A busbar comprises: a frame 1, a plurality of busbars 2 and a plurality of terminals 3, such as Fig. 20 shown.

[0131] Specifically, the frame 1 is an insulating member.

[0132] Each bus bar 2 includes an arc-shaped main body portion 21 and a plurality of connecting portions 22. Figures 1 to 9 as well as Fig.13 and Fig.14 As shown. The main body 21 is embedded in the frame 1 (as shown Fig.19 and Fig. 20 As shown), and extends along the circumferential direction of the skeleton 1, as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig.13 and Fig.14 As shown; a plurality of connecting portions 22 are connected to the main body portion 21 and protrude from the frame 1 (eg Fig. 20 As shown), a plurality of connecting portions 22 are evenly distributed along the circumference of the main body 21, and are used to connect the terminal 41 of the motor stator 42 winding, as shown Fig.24 and Fig.25 As shown, all busbars 2 are divided into a neutral busbar 24 and a plurality of phase busbars.

[0133] Multiple terminals 3 are respectively arranged on multiple phase bus bars, such as Figures 16 to 18 As shown, it is used to connect the power supply.

[0134] The main body 21 of the neutral bus bar 24 and the main bodies 21 of the multiple phase bus bars are sequentially stacked and arranged along the axial direction of the skeleton (eg Figures 16 to 18 ) and are spaced apart from each other (as shown Figure 21 to Figure 23 As shown), the connection portions 22 of all busbars 2 are evenly distributed along the circumferential direction of the skeleton.

[0135] Furthermore, the multiple connection portions 22 of each busbar 2 are sequentially recorded as the x-th connection portion 22 along the same rotation direction starting from the notch of the main body 21 thereof, and the multiple phase busbars are sequentially recorded as the y-th phase busbar along the axial direction of the skeleton, and the first phase busbar is arranged adjacent to the neutral busbar 24 .

[0136] The axis connection angle α between the first connection portion 22 of the neutral bus bar 24 and the adjacent first phase bus bar, and the axis connection angle β between the first connection portion 22 of the first phase bus bar and the adjacent second phase bus bar satisfy:

[0137] α=360° / (2×m×n)+360°×K / (m×n), β=360°×P / (m×n) and β≠360°×Q / n, m is the number of phase bus bars, n is the number of stator windings per phase, K∈[0,(m×n-1)], P∈(0,(m×n-1)], Q∈[1,m].

[0138] The busbar provided in this embodiment can use the connection parts 22 of multiple busbars 2 to connect the terminals 41 of multiple windings of the motor stator 42, and use the good conductivity of the busbars 2 to achieve electrical connection of the corresponding terminals 41, without directly connecting the corresponding terminals 41. This reduces the difficulty of wiring, facilitates efficient and fast operation of the production line, and is conducive to improving the production efficiency of the product.

[0139] At the same time, the main body 21 of the neutral bus bar 24 and the main body 21 of the phase bus bar are stacked one after another and spaced apart from each other along the axial direction of the skeleton 1, and each phase bus bar is rotated and staggered in the circumferential direction according to a set axial connection angle, which not only facilitates the rapid assembly of the bus and improves the production efficiency of the bus, but also makes all the connecting parts 22 evenly distributed along the circumferential direction of the skeleton 1, corresponding to the terminal ends 41 of multiple windings circumferentially spaced on the motor stator 42, and facilitates rapid wiring.

[0140] Specifically, the busbar includes a skeleton 1, a plurality of busbars 2 and a plurality of terminals 3. The skeleton 1 is an insulating part that can be formed by injection molding, supports the plurality of busbars 2 and the plurality of terminals 3, and isolates adjacent busbars 2 to provide electrical insulation. The plurality of busbars 2 are conductors, and each busbar 2 includes a main body 21 and a plurality of connecting parts 22. The plurality of connecting parts 22 of each busbar 2 are used to connect the terminals 41 that need to be connected together in the plurality of windings of the electronic stator 42, and realize the electrical connection of these terminals 41 through the main body 21 to realize the bus function.

[0141] Multiple terminals 3 are respectively arranged on multiple phase busbars, and the terminals 3 can be integrally formed with the corresponding phase busbars, or they can be formed separately and then installed on the corresponding phase busbars. Each terminal 3 is electrically connected to the terminal 41 connected to the corresponding busbar 2, and multiple terminals 3 are connected to the power supply to form an electrical circuit to supply power to multiple windings of the motor stator 42. Among them, the main body 21 is in the shape of an arc extending along the circumferential direction of the skeleton 1, and is not a complete ring. In this way, on the basis of ensuring that the same number of connecting parts 22 is present, the circumferential length of the main body 21 can be reduced, which is beneficial to saving raw materials and is convenient for processing and forming, such as forming by bending and the like. At the same time, it also makes the busbar 2 not a rotationally symmetrical structure, and the notch of its main body 21 can be used as a reference to facilitate the positioning of the busbar 2 during the assembly process.

[0142] Furthermore, all busbars 2 are divided into neutral busbars 24 and phase busbars. The circuit composed of the terminal 41 connected to the phase busbar (such as the end of part of the winding) and the circuit composed of the terminal 41 connected to the neutral busbar 24 (such as the starting end of all windings) can be connected in parallel to form a multi-phase circuit. Since all the connecting parts 22 of the busbar are evenly distributed along the circumferential direction of the skeleton 1 and correspond to the positions of the multiple terminals 41 of the motor stator 42, there is no need to reserve a long length for the terminal 41 to ensure that it can extend to the position of other terminals 41 to connect with other terminals 41. This not only shortens the length of the terminal 41, but also effectively prevents the terminal 41 from being entangled or confused during the wiring process, thereby reducing the difficulty of wiring.

[0143] The main bodies 21 of all busbars 2 are stacked and arranged along the axial direction of the frame 1, so that the radial dimensions of the plurality of main bodies 21 can be kept consistent. In this way, it is only necessary to arrange the plurality of busbars 2 connected with the terminals 3 together according to the set stacking method, such as Fig.16 and Fig.17 As shown, it is ensured that all the connection parts 22 are evenly distributed along the circumferential direction of the frame 1, and the positions of the multiple terminals 3 are correct, as shown in FIG. Fig.18 As shown, the skeleton 1 can be processed by integral injection molding. The processing technology is relatively simple and the structure of the skeleton 1 is also relatively simple.

[0144] The multiple connection parts 22 of each busbar 2 are recorded as the x-th connection part 22 in sequence along the same rotation direction starting from the notch of the main part 21, for example, counting from the notch of the main part 21 in the clockwise direction, they are the first connection part 22, the second connection part 22, the third connection part 22, and so on; the multiple phase busbars are recorded as the y-th phase busbar in sequence along the axial direction of the skeleton 1, and the first phase busbar is arranged in phase with the neutral busbar 24, that is, counting from the phase busbar that is axially closest to the neutral busbar 24, they are the first phase busbar, the second phase busbar, and so on.

[0145] Specifically, when stacking, first use the neutral bus bar 24 as a reference and stack the phase bus bars one by one. When stacking the first phase bus bar, an axial angle α is generated between its first connection portion 22 and the first connection portion 22 of the neutral bus bar 24; then stack the second phase bus bar so that an axial angle β is generated between its first connection portion 22 and the first connection portion 22 of the first phase bus bar. At this time, the multiple connections 22 of the first phase busbar and the multiple connections 22 of the second phase busbar respectively occupy the circumferential gaps between several adjacent connections 22 of the neutral busbar 24. For the solution with a third phase busbar or even more phase busbars, there are still a few remaining connections 22 of the neutral busbar 24 with larger circumferential gaps, which is manifested as some parts of the circumferential connections 22 of the busbar are relatively concentrated and some are relatively dispersed. Therefore, the remaining phase busbars only need to distribute their connections 22 in these circumferential gaps to ensure that all the connections 22 are evenly distributed along the circumferential direction of the skeleton 1 after assembly. Since the number of terminal terminals 41 connected to the phase busbars is relatively small, such as Figure 1 , Figure 4 , Figure 7 There are only four connecting parts 22 in the circuit, and the neutral bus bar 24 is connected to relatively more terminals 41, such as Fig.13 There are 12 connections 22, so the number of connections 22 of the phase busbars is also less than the number of connections 22 of the neutral busbar 24, so it is easier to accurately control the rotation of the phase busbars, reduce the probability of visual confusion, and help improve assembly efficiency.

[0146] Among them, α=360° / (2×m×n)+360°×K / (m×n), β=360°×P / (m×n) and β≠360°×Q / n. m×n is the number of slots of the stator to which the busbar is adapted, that is, the total number of coil windings, 360° / (2×m×n) is half of the angle between the axes of two adjacent connecting parts 22 of the neutral busbar 24, 360°×K / (m×n) and 360°×P / (m×n) are integer multiples of the angle between the axes of two adjacent connecting parts 22 of the neutral busbar 2, 360° / n is half of the angle between the axes of two adjacent connecting parts 22 of the phase busbar, and 360°×Q / n is an integer multiple of the angle between the axes of two adjacent connecting parts 22 of the phase busbar.

[0147] In this way, when the axial connection angle between the first connection portion 22 of the neutral bus bar 24 and the first connection portion 22 of the first phase bus bar is α, it indicates that the first connection portion 22 of the first phase bus bar is located between any two adjacent connection portions 22 of the neutral bus bar 24, and then the first connection portion 22 of the second phase bus bar is rotated by β relative to the first connection portion 22 of the first phase bus bar, which not only ensures that each connection portion 22 of the second phase bus bar is located between two adjacent connection portions 22 of the neutral bus bar 24, but also avoids overlapping with part of the connection portion 22 of the first phase bus bar in the circumferential direction, thereby ensuring that the connection portion 22 of the neutral bus bar 24, the connection portion 22 of the first phase bus bar, and the connection portion 22 of the second phase bus bar are staggered with each other in the circumferential direction.

[0148] It is worth noting that the axis-connecting line angle between the two connecting parts 22 refers to the angle between the center of one connecting part 22 and the perpendicular line of the central axis of the frame, and the angle between the center of the other connecting part 22 and the perpendicular line of the central axis of the frame. The center of the connecting part 22 refers to the center of the part of the connecting part 22 corresponding to the terminal of the stator winding, that is, in the projection on the plane perpendicular to the central axis of the bus, the center of the connecting part 22 coincides with the terminal of the stator winding. For all solutions with the same shape and size of the connecting parts 22, the axis-connecting line angle between the two connecting parts 22 refers to the angle between the same part of the two connecting parts 22 and the perpendicular line of the central axis of the frame.

[0149] Optionally, the material of the busbar 2 is copper, which has good electrical conductivity and is relatively cheap. Optionally, the material of the busbar 2 is H65 brass, which is easy to stamp and has sufficient hardness.

[0150] Optionally, m is 3.

[0151] If m is 3, the number of busbars 2 is four, and the number of terminals is three. A three-phase motor can be formed by reasonable connection. Among them, three busbars 2 are phase busbars, which are respectively connected to an equal number of terminals to form U-phase busbar 251, V-phase busbar 252 and W-phase busbar 253, respectively. Another busbar 2 is a neutral busbar 24, which is connected to the other terminal of all windings. Among them, the first phase busbar adjacent to the neutral busbar 24 is defined as W-phase busbar 253, followed by V-phase busbar 252 and U-phase busbar 251. After the neutral busbar 24, W-phase busbar 253 and V-phase busbar 252 are stacked, there are exactly n gaps left in the neutral busbar 24, corresponding to the n connecting parts 22 of the U-phase busbar 251, so the n connecting parts 22 of the U-phase busbar 251 can be placed in the gap positions accordingly.

[0152] Furthermore, the axis-connecting line angle γ between the first connecting portion 22 of the second phase bus bar and the first connecting portion 22 of the third phase bus bar satisfies: γ=360°×P / (m×n) and γ≠360°×Q / n.

[0153] The axial angle between the first connection portion 22 of the second phase busbar and the first connection portion 22 of the third phase busbar is γ. Since γ=360°×P / (m×n) and γ≠360°×Q / n, γ=β, and the process of stacking the third phase busbar is the same as that of stacking the second phase busbar, which is conducive to further improving production efficiency. For example: β=γ=30°, or β=γ=120°.

[0154] Optionally, K is 0.

[0155] When K=0, α=360° / (2×m×n), and the first connection portion 22 of the first phase busbar is located exactly between the first two connection portions 22 of the neutral busbar 24. In this way, the value of α is smaller, which is beneficial to further reduce the difficulty of assembling the busbar 2 and further improve production efficiency.

[0156] Of course, K can also be 1, 2 or other integers.

[0157] Optionally, P and n satisfy: P=n.

[0158] P=n, then β=360° / m and β≠360°×Q / n, which simplifies the calculation method of β, helps to further reduce the difficulty of assembling the busbar 2, and helps to further improve production efficiency.

[0159] Of course, P may not be equal to n.

[0160] Optionally, n is 4.

[0161] n is 4, that is, the number of stator windings per phase is 4. Of course, n is not limited to 4, and may also be 1, 2, 3, 5 or other values.

[0162] The two ends of the main body 21 are respectively the first end 211 and the second end 212. For example, all the main bodies 21 extend in the clockwise direction to form an arc shape, and the first end and the last end of any main body 21 are respectively the first end 211 and the second end 212. Figure 1 , Figure 4 , Figure 7 , Fig.10 and Fig.13 As shown, the connection portion 22 adjacent to the first end 211 is the first connection portion 22, and the connection portion 22 adjacent to the second end 212 is the nth connection portion 22. In the process of stacking the busbars 2, the first connection portion 22 of the main body 21 of the previous busbar 2 can be used as a reference to rotate the subsequently stacked busbars 2, so as to quickly obtain the required axis connection line angle.

[0163] In this way, after stacking is completed, the axial line angle between the first connection portion 22 of the first phase bus bar and the first connection portion 22 of the neutral bus bar 24 is 180° / (m×n), and the axial line angle between the first connection portions 22 of any two adjacent phase bus bars is 360° / m. This arrangement is simple and highly operable.

[0164] For example, when m=3, n=P=4, and K=0, α=180° / (m×n)=15°, β=γ=360° / m=120°. First, the W-phase busbar 253 is stacked on the neutral busbar 24, so that the axis connecting the first end 211 of the W-phase busbar 253 and the first end 211 of the neutral busbar 24 is at an angle of 15°. Fig.16 Then, the V-phase bus bar 252 is stacked on the W-phase bus bar 253, so that the axis connecting the first end 211 of the V-phase bus bar 252 and the first end 211 of the W-phase bus bar 253 has an angle of 120°. Fig.17 Finally, the U-phase bus bar 251 is stacked on the V-phase bus bar 252, so that the axis connecting the first end 211 of the U-phase bus bar 251 and the first end 211 of the V-phase bus bar 252 has an angle of 120°. Fig.18 shown.

[0165] The plurality of connection portions 22 are evenly distributed along the circumferential direction of the main body 21, and the first connection portion 22 and the last connection portion 22 are located at two ends of the main body 21. Figure 1 , Figure 4 , Figure 7 and Fig.13 shown.

[0166] The multiple connection parts 22 are evenly distributed along the circumferential direction of the main body 21, so that the structure of the busbar 2 is relatively regular and easy to process and shape; and all the connection parts 22 of the busbar after assembly can be evenly distributed along the circumferential direction. Since the terminal 41 of the motor stator winding is generally evenly distributed along the circumferential direction, a one-to-one correspondence is maintained.

[0167] At the same time, the first connecting part 22 and the last connecting part 22 are located at the two ends of the main body 21, that is, the main body 21 just lacks a part between the two connecting parts 22, which not only ensures the connection reliability between the main body 21 and the multiple connecting parts 22, but also shortens the length of the main body 21 as much as possible, which is conducive to further saving raw materials.

[0168] For example, when the number of the connecting parts 22 is 4, the arc of the main body 21 is 270°. Figure 1 , Figure 4 and Figure 7 When the number of connecting portions 22 is 6, the arc of the main body 21 is 300°; when the number of connecting portions 22 is 12, the arc of the main body 21 is 330°, as shown Fig.13 shown.

[0169] In addition, this solution also makes it possible to clearly distinguish the two connecting parts 22 (i.e., the first connecting part 22 and the last connecting part 22) located at both ends of the main body 21 from the connecting parts 22 in other parts, which can be used as references when stacking multiple bus bars 2 to further improve the stacking efficiency, thereby further improving the assembly efficiency.

[0170] The two ends of the main body 21 are respectively the first end 211 and the second end 212. For example, all the main bodies 21 extend in the clockwise direction to form an arc shape, and the first end and the last end of any main body 21 are respectively the first end 211 and the second end 212. Figure 1 , Figure 4 , Figure 7 , Fig.10 and Fig.13 As shown, the connection portion 22 connected to the first end 211 is the first connection portion 22, and the connection portion 22 connected to the second end 212 is the nth connection portion 22. In the process of stacking the busbars 2, the first end 211 of the main body 21 of the previous busbar 2 can be used as a reference to rotate the subsequently stacked busbars 2, so as to quickly obtain the required axis connection line angle.

[0171] Of course, both ends of the main body 21 may also be appropriately extended.

[0172] Furthermore, the number of the connection portions 22 of each phase bus bar is n, and each terminal is connected to the x-th connection portion 22 of the corresponding phase bus bar, where x∈[2, n-1].

[0173] Multiple terminals 3 correspond to multiple phase busbars one by one. The number of connection parts 22 of each phase busbar is n, and the n connection parts 22 are respectively connected to the n coils of each phase stator. Each terminal is connected to the xth connection part 22 of the corresponding phase busbar. Since x is greater than or equal to 2 and less than or equal to n-1, the connection part 22 of the connection terminal is not the connection part 22 located on both sides of the notch of the main body 21. Compared with the two ends of the main body 21, the strength of other parts of the main body 21 is relatively higher, and the probability of deformation is relatively low. Therefore, connecting the terminal to the connection part 22 of the phase busbar main body 21 away from the notch is conducive to further improving the position and verticality of the terminal, and further reducing the probability of deformation of the terminal.

[0174] Optionally, x is 2.

[0175] If x is 2, the terminal is connected to the second connection portion 22 of the corresponding phase bus bar, so that the first connection portion 22 of the phase bus bar is used as a reference for locating the position of the phase bus bar, and the second connection portion 22 is used to connect the terminal, which is convenient for searching and is conducive to further improving production efficiency. Of course, x is not limited to 2, and can also be other values.

[0176] Optionally, the plurality of terminals 3 are evenly arranged along the circumferential direction of the busbar, such as Fig. 20 and Fig.24 shown.

[0177] Optionally, the plurality of terminals 3 are arranged non-uniformly along the circumferential direction of the busbar.

[0178] Multiple terminals 3 are evenly distributed along the circumferential direction of the busbar, and the structure is relatively regular, which is conducive to increasing the distance between the terminals 3, ensuring the electrical insulation between the terminals 3, and meeting the customer's requirement for the terminals 3 to be evenly distributed along the circumferential direction. Alternatively, multiple terminals 3 are unevenly arranged along the circumferential direction of the busbar, such as being concentrated in one area of ​​the busbar, to meet the customer's requirement for the terminals 3 to be unevenly distributed along the circumferential direction.

[0179] Among them, the thickness t of all the main body parts 21 is equal, such as Fig.21 and Fig. 22 shown.

[0180] If the thickness t of all the main bodies 21 is equal, all the bus bars 2 can be made of the same material, which is beneficial to reducing the types of raw materials, facilitating processing and molding, and also beneficial to saving costs.

[0181] Optionally, the thickness of the main body 21 is in the range of 0.7 mm-1.0 mm (eg, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.).

[0182] Of course, the thickness t of all the main body parts 21 can also be adjusted as needed.

[0183] The intervals t2 between adjacent main body portions 21 are equal.

[0184] The spacing between adjacent main bodies 21 is equal, so that the internal structure of the busbar is regular and the electrical insulation between the busbars 2 is ensured.

[0185] Optionally, the spacing between adjacent main body portions 21 is 0.5 mm-3 mm (such as 0.5 mm, 1 mm, 2 mm, 3 mm, etc.).

[0186] Of course, the distance t2 between adjacent main body portions 21 can also be adjusted as needed.

[0187] Optionally, the distance t1 between the two axial end surfaces of the main body 21 of the plurality of busbars 2 and the two axial end surfaces of the frame 1 is smaller than the distance t2 between adjacent main body 21, such as Fig.21 and Fig. 22 That is to say, the spacing between the neutral bus bar 24 and the axial end face of the frame 1 and the spacing between the U-phase bus bar 251 and the axial end face of the frame 1 are equal, denoted as t1, and t1<t2, which is conducive to reducing the longitudinal height of the frame 1, thereby further reducing the longitudinal size of the bus bar and further reducing the axial length of the motor.

[0188] Of course, the distance between the neutral bus bar 24 and the axial end surface of the frame 1 and the distance between the U-phase bus bar 251 and the axial end surface of the frame 1 can also be adjusted as needed.

[0189] Furthermore, the widths of all the main bodies 21 are equal.

[0190] The widths of all the main bodies 21 are equal, that is, the dimensions of all the main bodies 21 along the radial direction of the skeleton 1 are equal. In this way, after the main bodies 21 of all the bus bars 2 are stacked along the axial direction of the skeleton 1, the inner edges of all the main bodies 21 are located on the same circle, and the outer edges of all the main bodies 21 are also located on the same circle, so that the structure of the busbar is relatively regular, which is convenient for the processing and forming of each bus bar 2 and the processing and forming of the skeleton 1.

[0191] Furthermore, the main body 21 of all phase bus bars is the same, such as Figure 1 , Figure 4 and Figure 7 shown.

[0192] The main bodies 21 of all the phase bus bars are the same, that is, the shapes and sizes are completely consistent, which is conducive to reducing the processing difficulty of the phase bus bars and improving production efficiency.

[0193] Furthermore, in the projection on the plane perpendicular to the axis of the frame 1, the main bodies 21 of all the busbars 2 overlap each other to form a ring, such as Fig. 20 shown.

[0194] In the projection on the plane perpendicular to the axis of the frame 1, the main parts 21 of all the busbars 2 are superimposed on each other to form a ring, that is, the projections of the main parts 21 of all the busbars 2 on the plane perpendicular to the axis of the frame 1 are located in the same ring. Since each main part 21 has a notch, its projection is not a complete ring, and the projections of multiple main parts 21 are superimposed to form a complete ring, which is conducive to improving the strength of the busbar and facilitating the rotational dislocation of the busbars 2 with each other, ensuring that all the connecting parts 22 are evenly distributed along the circumferential direction of the frame 1.

[0195] Embodiment 2

[0196] The difference from the first embodiment is that: on the basis of the first embodiment, further, the end surfaces of the connection portions 22 of all the busbars 2 away from the stator windings are kept flush in the axial direction of the frame 1, such as Fig.18 and Fig.19 shown.

[0197] All end surfaces of the connection parts 22 away from the stator winding are kept flush in the axial direction of the frame 1 (that is, all end surfaces of the connection parts 22 away from the stator winding are located on the same plane perpendicular to the central axis of the frame 1). Fig.19 As shown, in this way, the terminal ends 41 of all windings can also be kept flush, with the same length reserved. After welding is completed, the excess wire ends are cut off at the same position to achieve high consistency in wiring operations, which is convenient for both manual and machine operations, and is therefore beneficial to significantly improve the production efficiency of the production line.

[0198] In other words, if all the connecting parts 22 remain flush in the axial direction of the skeleton 1, the terminal blocks 41 of the multiple windings of the motor stator can maintain a consistent shape and size, which is convenient for controlling the paint stripping position of each terminal block 41, facilitating welding of the terminal block 41 and the connecting part 22 on the production line, and facilitating cutting off excess wire ends after welding, thereby significantly improving production efficiency, shortening production cycle, and improving product consistency.

[0199] Furthermore, the end surfaces of the connection portions 22 of all the busbars 2 close to the stator windings remain flush in the axial direction of the skeleton 1 , so that all the connection portions 22 remain flush in the axial direction of the skeleton 1 .

[0200] The end faces of the connection parts 22 of all busbars 2 close to the stator windings are also kept flush in the axial direction of the frame 1 (that is, the end faces of all connection parts 22 close to the stator windings are located on the same plane perpendicular to the central axis of the frame 1), so that all connection parts 22 are kept flush in the axial direction of the frame 1, so that the paint coating on the outside of the enameled wire can be peeled off at the same position for welding during the wiring process, further improving the consistency of the wiring operation. At the same time, all connection parts 22 can adopt the same shape, which improves the regularity and consistency of the product and facilitates processing and molding.

[0201] Furthermore, the main body 21 of the neutral bus bar 24 is arranged at a position facing the winding, such as Fig.25 shown.

[0202] Since the number of terminals 41 connected to the phase busbars is relatively small, and the number of terminals 41 connected to the neutral busbars 24 is relatively large, the number of connecting portions 22 of the phase busbars is also less than the number of connecting portions 22 of the neutral busbars 24. Therefore, the main bodies 21 of the plurality of phase busbars are arranged adjacent to each other in sequence, such as Figures 16 to 18 As shown, it is only necessary to change the axial position of the connection portion 22 of the phase bus bar so that the connection portion 22 is flush with the axial position of the neutral bus bar 24, without changing the axial position of the connection portion 22 of the neutral bus bar 24, which is beneficial to reduce processing difficulty and improve production efficiency.

[0203] Further, the main body 21 of the neutral bus bar 24 is arranged at a position facing the winding, and the connecting portion 22 of the phase bus bar can be offset to a position close to the winding, which is beneficial to shorten the distance between the terminal 41 and the connecting portion 22. Fig.25 As shown, the length of the terminal 41 is shortened and the difficulty of welding the terminal 41 is reduced.

[0204] The connection portion 22 of the neutral bus bar 24 is directly connected to the main body portion 21 (eg Fig.13 As shown), the connection portion 22 of each phase bus bar is connected to its main body 21 through an extension portion 23 (as shown Figure 1 , Figure 4 and Figure 7 The extension portion 23 extends along the axial direction of the frame toward the neutral bus bar 24 (as shown in FIG. Figure 1 , Figure 4 and Figure 7 As shown), the connection portion 22 of the phase bus bar is kept flush with the connection portion 22 of the neutral bus bar 24 in the axial direction of the skeleton 1, as shown Fig.19 shown.

[0205] The connection portion 22 of the neutral busbar 24 is directly connected to its main body 21, and the connection portion 22 of each phase busbar is connected to its main body 21 through an extension portion 23, that is, the neutral busbar 24 has no extension portion 23, and only a plurality of phase busbars include extension portions 23, which are extended toward the neutral busbar 24 by the extension portion 23, and the axial lengths of the extension portions 23 of the plurality of phase busbars are not equal, so that the connection portion 22 of each phase busbar can be kept flush with the connection portion 22 of the neutral busbar 24 in the axial direction of the skeleton 1. In this way, the structure of the neutral busbar 24 is effectively simplified, and the distance between the terminal 41 and the connection portion 22 is further shortened, which is conducive to further shortening the length of the terminal 41 and further reducing the difficulty of welding the terminal 41.

[0206] Specifically, the extension piece 221 of the neutral bus bar 24 is straight. Fig.13 As shown, it is directly connected to the outer periphery of the main body 21 of the neutral bus bar 24. The extension piece 221 of the phase bus bar is also straight. Figure 1 , Figure 4 and Figure 7 As shown, an extension portion 23 is provided between the extension piece 221 and the main body 21 of the phase bus bar, and the extension portion 23 extends axially toward the neutral bus bar 24, so that the extension piece 221 of the phase bus bar is flush with the extension piece 221 of the neutral bus bar 24. In this way, the connection portion 22 of the phase bus bar is also flush with the connection portion 22 of the neutral bus bar 24.

[0207] Furthermore, at least part of the busbar 2 further includes an extension portion 23, such as Figure 1 , Figure 4 and Figure 7 The extension portion 23 is located between the outer periphery of the main body 21 and the connecting portion 22, and is used to connect the main body 21 and the connecting portion 22; and the extension portion 23 at least partially extends along the axial direction of the frame 1 (such as Fig.12 As shown), all the connecting parts 22 remain flush in the axial direction of the skeleton 1.

[0208] At least part of the busbars 2 includes an extension portion 23, and the two ends of the extension portion 23 are respectively connected to the main body 21 and the connection portion 22. Since the extension portion 23 at least partially extends along the axial direction of the frame 1, the extension portion 23 can easily achieve the flushness of multiple connection portions 22 in the axial direction of the frame 1; and it is convenient to reasonably design the shape and size of the connection portion 22 according to needs, which is conducive to optimizing the structure of the product.

[0209] Optionally, only some of the busbars 2 may include the extension portion 23, and the extension portion 23 is used to keep the connection portion 22 flush with the extension portion 23 of other busbars 2 without the extension portion 23. Fig.16 , Fig.17 and Fig.18 In the figure, the U-phase busbar 251, the V-phase busbar 252 and the W-phase busbar 253 are provided with extension portions 23 of different axial lengths, while the neutral busbar 24 has no extension portion 23. The three phase busbars 2 have extension portions 23 of different axial lengths so that their connecting portions 22 remain axially flush with the connecting portion 22 of the neutral busbar 24.

[0210] Optionally, all the busbars 2 may include the extension portion 23 , and the extension portions 23 of different busbars 2 may extend in different sizes in the axial direction, so that all the connection portions 22 remain flush in the axial direction.

[0211] Of course, the busbar 2 may also not have the extension portion 23 , and all the connection portions 22 may be flush in the axial direction of the frame 1 directly by the specific connection positions between the connection portions 22 and the main body 21 and by reasonably designing the shapes and sizes of the connection portions 22 .

[0212] Optionally, the extension portion 23 is embedded in the frame 1, such as Fig. 22 and Fig.23 shown.

[0213] The extension portion 23 is embedded in the frame 1, and only the connection portion 22 is exposed on the frame 1. Fig. 20 In this way, the appearance structure of the busbar is relatively regular, and the frame 1 can provide good support for the extension part 23, effectively preventing the extension part 23 from deformation or shaking, thereby improving the stability of the position of each connection part 22, facilitating production line operation, and further improving production efficiency.

[0214] Furthermore, the connection portion 22 is provided with a limiting groove 26 adapted to the wiring terminal 41, such as Figure 1 , Figure 4 , Figure 7 and Fig.13 As shown, the limiting groove 26 is for the terminal 41 to pass through (as shown in FIG. Fig.24 as shown) and is suitable for being connected to the terminal 41 by welding.

[0215] The connection part 22 is provided with a limiting groove 26. During the wiring operation, the connection terminal 41 is passed through the limiting groove 26 before the welding operation is performed. In this way, the limiting groove 26 can not only play a good limiting role for the connection terminal 41 to prevent the connection terminal 41 from shaking or tilting, but also help to increase the contact area between the connection terminal 41 and the connection part 22, thereby reducing the difficulty of welding and helping to further improve production efficiency.

[0216] Specifically, the connecting portion 22 includes a connecting piece 222 and a bending piece 223. Figure 1 , Figure 4 , Figure 7 and Fig.13The connecting piece 222 is connected to the main body 21 and extends along the circumferential direction of the frame 1, as shown in FIG. Figure 1 , Figure 4 , Figure 7 and Fig.13 As shown Figure 1 , Figure 4 , Figure 7 and Fig.13 The bending piece 223 is connected to the connecting piece 222 and is bent and extended, and the connecting piece 222 is surrounded by a U-shaped limiting groove 26, as shown Figure 1 , Figure 4 , Figure 7 and Fig.13 shown.

[0217] The connecting portion 22 includes a connecting piece 222 and a bending piece 223. The connecting piece 222 and the bending piece 223 surround a U-shaped limiting groove 26, so that the limiting groove 26 forms a structure with two axial ends open and a circumferential gap (that is, the projection of the limiting groove 26 on the axial end surface of the frame 1 is U-shaped). This is conducive to increasing the space of the limiting groove 26, facilitating the rapid passage of the terminal 41, and also conducive to increasing the space for welding operation and reducing the difficulty of welding operation.

[0218] The thickness direction of the connecting piece 222 and the thickness direction of the bending piece 223 are perpendicular to the axial direction of the frame 1. Figure 1 , Figure 4 , Figure 7 , Fig.13 shown.

[0219] The thickness directions of the connecting piece 222 and the bending piece 223 are both perpendicular to the axial direction of the frame 1, which increases the depth of the limiting groove 26 and helps to increase the contact area between the limiting groove 26 and the terminal 41, thereby further reducing the difficulty of welding and improving the strength of the welding connection.

[0220] Furthermore, the U-shaped openings of all the limiting grooves 26 face the same rotation direction. Fig.18 and Fig. 20 shown.

[0221] The U-shaped openings of all the limit grooves 26 face the same rotation direction (for example, all are clockwise rotation directions, or all are counterclockwise rotation directions), so that the structure of the bus is relatively regular, which is not only convenient for the processing and forming of each bus bar 2, but also beneficial for the appropriate rotation of the bus during production line operation so that all the terminal terminals 41 pass through each limit groove 26 synchronously, thereby also helping to further improve production efficiency.

[0222] The size of the connecting piece 222 along the circumferential direction of the frame 1 is larger than the size of the bending piece 223 and the part opposite to it along the circumferential direction of the frame 1. Figure 1 , Figure 4 , Figure 7 and Fig.13 shown.

[0223] The dimension of the connecting piece 222 along the circumferential direction of the skeleton 1 is greater than the dimension of the portion of the bending piece 223 opposite to the connecting piece 222 along the circumferential direction of the skeleton 1. The connecting piece 222 and the bending piece 223 form a J-shaped structure, which facilitates the reasonable setting of the position of the limiting groove 26 and provides a more favorable operating space for the welding operation of the terminal 41.

[0224] Furthermore, the connecting portion 22 further includes an extension piece 221 extending in the radial direction of the frame 1, such as Figure 1 , Figure 4 , Figure 7 and Fig.13 The radial inner end of the extension piece 221 is connected to the main body 21 , and the radial outer end of the extension piece 221 is connected to the portion of the connection portion 22 used for connecting the terminal 41 .

[0225] The connecting portion 22 further includes an extension piece 221, which extends in the radial direction of the frame 1, and its radial inner and outer ends are respectively connected to the main body 21 and the portion of the connecting portion 22 used to connect the terminal 41 (specifically, the connecting piece 222). In this way, the radial distance between the connecting piece 222 and the main body 21 can be increased, which is beneficial to reducing the radial size of the main body 21 to reduce production costs, and is beneficial to increasing the distance between adjacent connecting portions 22, thereby facilitating the reasonable design of the shape and size of the connecting portion 22 and further optimizing the product structure.

[0226] Furthermore, the plurality of terminals 3 are evenly arranged along the circumferential direction of the busbar, such as Fig. 20 and Fig.24 shown.

[0227] The multiple terminals 3 are evenly distributed along the circumferential direction of the busbar, and the structure is relatively regular, which is conducive to increasing the distance between the terminals 3, ensuring the electrical insulation between the terminals 3, and meeting the customer's requirement for the terminals 3 to be evenly distributed along the circumferential direction. Of course, the multiple terminals 3 can also be concentrated in one area, or distributed in other ways.

[0228] Furthermore, the plurality of connecting portions 22 are evenly distributed along the circumferential direction of the main body portion 21, such as Fig.18 , Fig. 20 and Fig.24 shown.

[0229] Multiple connection parts 22 are evenly distributed along the circumferential direction of the main body 21, so that the structure of the busbar 2 is relatively regular and easy to process and form, and all connection parts 22 of the busbar can be evenly distributed along the circumference after assembly. Since the terminal 41 of the motor stator 42 winding is generally also evenly distributed along the circumference, a one-to-one correspondence is maintained.

[0230] Furthermore, both ends of the connecting portions 22 of all the busbars 2 along the axial direction of the frame 1 do not protrude from the planes where the two axial end surfaces of the frame 1 are located. Fig.19 shown.

[0231] Both ends of all the connecting parts 22 along the axial direction of the skeleton 1 do not protrude beyond the plane where the two axial end surfaces of the skeleton 1 are located. Compared with the connecting parts 22 protruding from the two axial end surfaces of the skeleton 1, the axial height of the bus 1 can be reduced, so that the bus occupies less space in the axial direction, which is beneficial to reducing the axial length of the motor and optimizing the structure of the motor.

[0232] Furthermore, the busbar 2 connected to the terminal 3 is connected to the terminal 3 through the extension piece 221 of one of the connecting parts 22, such as Figures 16 to 18 shown.

[0233] For the busbar 2 connected to the terminal 3, the busbar 2 is connected to the terminal 3 through the extension piece 221 of one of the connecting parts 22, so there is no need to design other additional structures on the busbar 2 to connect the terminal 3, thereby simplifying the structure of the busbar 2 and not causing the radial size of the busbar to increase.

[0234] Of course, the terminal 3 may also be formed by bending and extending the bus bar 2. Alternatively, the terminal 3 may also be directly connected to the main body 21 and spaced apart from the connecting portion 22.

[0235] The extension piece 221 is perpendicular to the axial direction of the frame 1. Figure 1 , Figure 4 , Figure 7 and Fig.13 The terminal 3 is in sheet form, and the dimension a0 of the extension sheet 221 connected with the terminal 3 along the thickness direction of the terminal 3 is greater than the dimension a of the other extension sheets 221 of the same busbar 2 along the thickness direction of the terminal 3, as shown in FIG. Figure 2 , Figure 5 , Figure 8 and Fig.10 shown.

[0236] The extension piece 221 is perpendicular to the axial direction of the frame 1, which is beneficial to reducing the axial dimension of the busbar 2. The dimension a0 of the extension piece 221 connected with the terminal 3 along the thickness direction of the terminal 3 is greater than the dimension a of other extension pieces 221 on the same busbar 2 along the thickness direction of the terminal 3, which is beneficial to increase the contact area between the extension piece 221 and the terminal 3, thereby improving the connection strength and stability of the terminal 3 and reducing the probability of deformation of the terminal 3.

[0237] Furthermore, the terminal 3 is bent into an L-shape, such as Fig.11 Specifically, the terminal 3 includes an extension section 31 parallel to the axial direction of the frame 1 and a connection section 32 parallel to the extension piece 221. The connection section 32 is welded to the extension piece 221. Fig.10 , Fig.11 and Fig.18 shown.

[0238] The terminal 3 is bent and includes an extension section 31 and a connection section 32. The extension section 31 extends along the axis of the frame 1 and is used to connect to a power source. The connection section 32 is parallel to the extension piece 221 and is welded to the extension piece 221, which increases the contact area between the terminal 3 and the extension piece 221, thereby improving the connection strength and stability of the terminal 3 and reducing the probability of deformation of the terminal 3.

[0239] Furthermore, the dimension b0 of the portion for connecting the terminal 41 corresponding to the extension piece 221 connected with the terminal 3 along the circumferential direction of the frame 1 is greater than the dimension b of other portions for connecting the terminal 41 on the same busbar 2 along the circumferential direction of the frame 1, such as Fig.10 shown.

[0240] The dimension b0 of the portion for connecting the terminal 41 corresponding to the extension piece 221 connected to the terminal 3 along the circumferential direction of the skeleton 1 is appropriately increased relative to the dimension b of other portions on the bus bar 2 for connecting the terminal 41 along the circumferential direction of the skeleton 1. The circumferential distance between the terminal 3 and the portion of the connecting portion 22 for connecting the terminal 41 can be increased, thereby providing an avoidance space to facilitate the welding operation of the terminal 41.

[0241] Specifically, by appropriately extending the length of the connecting piece 222 to increase the distance between the U-shaped limiting groove 26 and the extending piece 221 , the U-shaped limiting groove 26 can be avoided.

[0242] Embodiment 3

[0243] The difference from any of the above embodiments is that: on the basis of any of the above embodiments, further, the skeleton 1 includes an annular support 11 and a plurality of strip-shaped supports 12. Specifically, the plurality of strip-shaped supports 12 are integrally connected to the annular support 11, such as Fig.23The main body 21 of all busbars 2 is embedded in the annular bracket 11, as shown in FIG. Figure 21 to Figure 23 As shown. The plurality of strip-shaped brackets 12 correspond to the plurality of terminals 3 one by one, as shown Fig. 20 As shown, a portion of each terminal 3 is embedded in the corresponding strip-shaped bracket 12, as shown in FIG. Fig.23 and Fig.25 shown.

[0244] The skeleton 1 includes a ring bracket 11 and a strip bracket 12. The ring bracket 11 is used to support a plurality of bus bars 2 and ensure the insulation between the plurality of bus bars 2. The plurality of strip brackets 12 are used to support a plurality of terminals 3 and ensure the electrical insulation between the terminals 3 and other structures. Since the ring bracket 11 and the plurality of strip brackets 12 are integrally connected, they can be formed into an integral structure by integral molding during the injection molding process, so the connection is relatively reliable. Fig.23 and Fig.25 As shown, compared with the solution in the prior art of separately forming an insulating part and then sleeved on the terminal 3, the strip bracket 12 of this solution can provide good support and limiting effects for the terminal 3, effectively preventing the terminal 3 from shaking and deforming, ensuring the good positioning and verticality of the terminal 3 and a firm structure, so that when the controller PIN needle is inserted into the terminal 3, the part of the terminal 3 exposed to the strip bracket 12 is not prone to deformation and failure.

[0245] Optionally, a dimension c of the strip-shaped bracket 12 along the axial direction of the skeleton 1 is greater than or equal to half of a dimension c0 of the terminal 3 along the axial direction of the skeleton 1 .

[0246] If the dimension c of the strip bracket 12 along the axial direction of the skeleton 1 is greater than or equal to half of the dimension c0 of the terminal 3 along the axial direction of the skeleton 1, the range of the strip skeleton 1 wrapping the terminal 3 exceeds half of the terminal 3, thereby significantly improving the supporting and limiting effects on the terminal 3, and effectively ensuring the stability and reliability of the terminal 3.

[0247] Furthermore, the terminal 3 is connected to one of the connecting portions 22 of the corresponding busbar 2. In the projection of a plane perpendicular to the central axis of the frame 1, the strip-shaped bracket 12 is arranged asymmetrically with respect to the terminal 3 in the thickness direction of the terminal 3, such as Fig. 20 As shown, the dimension d1 of the portion close to the corresponding connection portion 22 for connecting the terminal 41 is smaller than the dimension d2 of the portion far from the corresponding connection portion 22 for connecting the terminal 41 .

[0248] The terminal 3 is connected to one of the connecting portions 22 of the corresponding busbar 2, and the terminal 3 and the portion of the connecting portion 22 for connecting the terminal 41 are close to each other, and the strip-shaped bracket 12 circumferentially wraps the terminal 3, which may interfere with the welding operation of the terminal 41. Therefore, the strip-shaped bracket 12 is arranged asymmetrically, such as Fig. 20 As shown, the portion close to the connection terminal 41 is relatively thinner, while the portion away from the connection terminal 41 is relatively thicker, as shown in FIG. Fig. 20 As shown, this not only ensures reliable support for the terminal 3, but also avoids the portion of the connecting portion 22 used to connect the terminal 41, reserving space for the welding operation of the terminal 41, which is conducive to reducing the difficulty of the welding operation.

[0249] Furthermore, the dimension d of one of the strip-shaped brackets 12 along the thickness direction of the terminal 3 is different from the dimension d of the other strip-shaped brackets 12 along the thickness direction of the terminal 3, such as Fig. 20 shown.

[0250] The size of one of the strip-shaped brackets 12 along the thickness direction of the terminal 3 is different from the size of the other strip-shaped brackets 12 along the thickness direction of the terminal 3, so that the three strip-shaped brackets 12 are not completely consistent in appearance. Fig. 20 This can prevent mistakes in assembly, facilitate quick identification of each bus bar 2, and then locate the relative position between the bus bar and the stator 42 winding, which is conducive to further improving production efficiency.

[0251] Of course, the dimensions of the plurality of strip-shaped brackets 12 along the thickness direction of the terminal 3 may also be inconsistent, which can also play a role in preventing mistakes in assembly.

[0252] Optionally, the projection of the terminal 3 on the axial end surface of the frame 1 is in the shape of a long strip, and the length direction of the projection extends along the radial direction of the frame 1, such as Fig.18 , Fig. 20 and Fig.24 shown.

[0253] The projection of the terminal 3 on the axial end face of the frame 1 is in the shape of a long strip. Since the terminal 3 is generally in the shape of a long thin strip and extends along the axial direction of the frame 1, the projection of the terminal 3 on the axial end face of the frame 1 is substantially the same as the shape of the cross section of the terminal 3. The length direction of the projection extends along the radial direction of the frame 1, such as Fig. 20 and Fig.24 As shown, the radial space of the busbar is reasonably utilized, which can meet the customer's requirement for radial arrangement of the terminal 3.

[0254] Embodiment 4

[0255] The difference from any of the above embodiments is that the projection of the terminal 3 on the axial end face of the frame 1 is in the shape of an elongated strip, and the length direction of the projection extends along the circumferential direction of the frame 1 .

[0256] The projection of the terminal 3 on the axial end face of the frame 1 is in the shape of an elongated strip. Since the terminal 3 is generally in the shape of an elongated thin sheet and extends along the axial direction of the frame 1, the projection of the terminal 3 on the axial end face of the frame 1 is substantially the same as the shape of the cross section of the terminal 3. The length direction of the projection can also extend along the circumferential direction of the frame 1, which reasonably utilizes the circumferential space of the busbar, can meet the customer's requirements for the circumferential arrangement of the terminal 3, and is conducive to reducing the radial size of the busbar.

[0257] Optionally, the number of bus bars 2 is four, and the number of terminals 3 is three, such as Fig.18 As shown, the numbers of the connection portions 22 of three bus bars 2 are equal, and the number of the connection portions 22 of another bus bar 2 is the sum of the numbers of the connection portions 22 of the other three bus bars 2 .

[0258] The number of busbars 2 is four, and the number of terminals 3 is three. Through reasonable connection, a three-phase motor can be formed. Among them, three busbars 2 are phase busbars 2, which are respectively connected to an equal number of terminals 41 to form U-phase busbars 251 (such as Figures 1 to 3 As shown), V-phase bus bar 252 (as shown Figures 4 to 6 ) and W-phase bus bar 253 (as shown Figures 7 to 10 The other bus bar 2 is a neutral bus bar 24 (as shown in FIG. Figures 13 to 15 As shown), connected to another terminal 41 of all windings.

[0259] Of course, the number of the bus bars 2 is not limited to four, and may also be three, five, etc.

[0260] Furthermore, a hook 13 is provided on the surface of the frame 1 away from the terminal 3. Fig.19 As shown, it is used to clamp the motor stator 42, such as Fig.25 shown.

[0261] A hook 13 is provided on the surface of the frame 1 away from the terminal 3 to facilitate engagement with the stator 42 and prevent the busbar from shaking, tilting, shifting, etc. during welding, thereby further improving production efficiency.

[0262] There may be multiple hooks 13 , which are evenly distributed along the circumferential direction of the frame 1 . The hooks 13 and the frame 1 may be integrally formed by injection molding.

[0263] Furthermore, the stator 42 is generally also provided with an injection-molded insulating frame, on which a slot adapted to the hook 13 may be provided, and the hook 13 is directly inserted into the slot. Fig.25 As shown, the latching connection with the stator 42 is realized.

[0264] like Fig.24 and Fig.25As shown, the motor provided by the embodiment of the second aspect of the present invention comprises: a motor body 4 and a bus as in any one of the embodiments of the first aspect.

[0265] Specifically, the motor body 4 includes a stator 42, and the stator 42 is provided with a winding, such as Fig.26 As shown, the winding has two terminals 41; the connecting portion 22 of the busbar is connected to the terminal 41, as shown in FIG. Fig.25 shown.

[0266] The motor provided in the embodiment of the second aspect of the present invention includes the busbar of any one of the embodiments of the first aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0267] Optionally, the connection terminal 41 is connected to the busbar by resistance welding, or other welding methods such as ultrasonic welding or other fixed connection methods.

[0268] Optionally, the number of windings is 12, such as Fig.26 and Fig. 27 As shown, the 12 windings are connected in a star connection, such as Fig.28 shown.

[0269] If the number of windings is 12, then the number of slots in the stator 42 is also 12, and the phase difference between one of the phase busbars and the neutral busbar 24 is 15°. Since the 12 windings have 24 joints, a star connection is adopted, and the 12 wire ends at the starting ends of the 12 windings need to be connected together, and the end ends of the C1, C4, C7, and C10 windings, the end ends of the C2, C5, C8, and C11 windings, and the end ends of the C3, C6, C9, and C12 windings are connected together, so the wiring method is very complicated. The solution of the present application can effectively reduce the wiring difficulty, and the wiring method is simple and reliable.

[0270] Of course, the number of windings is not limited to 12, and may also be 8, 16, etc.; the connection method of the windings is not limited to the above method, and may also be a triangle connection or other methods.

[0271] A vehicle provided by an embodiment of the third aspect of the present invention comprises: a vehicle body and a motor as described in any one of the technical solutions of the second aspect, installed in the vehicle body.

[0272] The vehicle provided by the technical solution of the third aspect of the present invention comprises the motor described in the technical solution of the second aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be described in detail here.

[0273] The following takes the 8P12S permanent magnet motor as an example for a detailed explanation.

[0274] For the 8P12S permanent magnet motor, there are 12 teeth in total. Each tooth is wound to form a winding. Each winding has a starting end and an ending end. Therefore, there are 24 wire ends in total for the 12 teeth, which are evenly distributed along the circumference, one every 15°. Fig.26 The motor adopts 4-way parallel connection and star connection, as shown in Fig.28 This wiring method requires connecting the 12 wire ends at the starting ends of the 12 windings together, as shown in Fig. 27 and Fig.28 As shown, the end ends of the C1, C4, C7, C10 windings, the end ends of the C2, C5, C8, C11 windings, and the end ends of the C3, C6, C9, C12 windings are connected together, and the wiring form is complicated. Therefore, a simple and reliable structure is required.

[0275] The present invention aims to design a busbar structure which can meet the wiring requirements of an 8P12S motor and has the characteristics of small axial and radial space occupation, simple wiring, and reliable structure.

[0276] The busbar includes an insulating skeleton 1, a center copper bar (i.e., a neutral busbar 24), a U-phase copper bar (i.e., a U-phase busbar 251), a V-phase copper bar (i.e., a V-phase busbar 252), a W-phase copper bar (i.e., a W-phase busbar 253), and three terminals 3. The insulating skeleton 1 is integrally injection molded to support the copper bar and the terminal 3 and to insulate the copper bars. The insulating skeleton 1 is clamped and fixed to the motor stator 42 skeleton 1. The center copper bar and the U, V, and W-phase copper bars are copper bars of equal thickness, which are made by stamping, bending, and other processes. The main body area is a ring with a notch, and a U-shaped terminal 3 (i.e., a connecting portion 22 with a U-shaped limiting groove 26) extends from the main body area to be welded with the copper enameled wire (i.e., the terminal 41). The three terminals 3 are distributed 120° along the circumference, and are welded with the U, V, and W-phase copper bars by resistance to input current into the motor winding.

[0277] Specifically, the motor is an 8P12S motor with 12 teeth. Copper wire is wound around each tooth to form 12 windings C1-C12. Each winding has a starting end wire head and an ending end wire head. Fig.26 As shown. According to the motor circuit design ( Fig. 27 As shown in the figure, the starting end wire ends evenly distributed along the circumference at 30° need to be connected together for conduction, which is defined as the center point connection. In addition, the ending end wire ends evenly distributed along the circumference at 30° need to be divided into three parts: C1, C4, C7, and C10 winding end ends are connected, which is defined as the U phase connection; C2, C5, C8, and C11 winding end ends are connected, which is defined as the V phase connection; C3, C6, C9, and C12 winding end ends are connected, which is defined as the W phase connection.

[0278] In order to meet the above connection requirements, a central point connection copper busbar ( Fig.13 and Fig.14 As shown) and U, V, W phase copper bars (as shown Fig.10 The center copper bar and the U, V, and W phase copper bars are formed by stamping and bending copper bars of equal thickness. The thickness t of the copper bar is between 0.7 and 1.0 mm, and the material is H65 brass, which is easy to stamp and has sufficient hardness. The end of the copper bar is designed as a U-shaped groove, which is convenient for the enameled wire to be put into the U-shaped groove, and then resistance welding is applied.

[0279] The width direction of the three terminals 3 of the motor is arranged radially, and the three terminals 3 are spaced 120 degrees apart from each other. The three terminals 3 are distributed with the three-phase copper bars for resistance welding. In order to meet the requirements of resistance welding, the ends of the terminals 3 are bent (such as Fig.11 As shown), the welding area of ​​the 3-phase copper busbar was widened (as shown Fig.10 shown).

[0280] Stack the 4 layers of copper busbars one by one, with the center copper busbar at the bottom, followed by W, V, and U. Figures 16 to 18 As shown. The distance between layers is 1mm0.5mm-3mm (such as 0.5mm, 1mm, 2mm, 3mm, of course not limited to this range, it can also be other values). The difference between the first U-shaped groove of the W layer copper bar and any groove of the center point copper bar is 15°, such as Fig.16 As shown, the terminal 3 connected to the V and U copper bars is 120° away from the W phase terminal 3. Fig.17 and Fig.18 After stacking, the whole is injected and the shape after injection molding is as follows Fig. 20 The injection molding completely wraps the three terminals 3, and the terminals 3 have good positioning and verticality, and a firm structure, so that when the controller pin is inserted into the terminal 3, the terminal 3 is not prone to deformation and failure.

[0281] Since the center copper bar, U, V, and W three-phase copper bars are at different heights, the U-shaped groove of the copper bar is bent downwards, and the bending height is h. Figure 3 , Figure 6 and Fig. 9 As shown in the figure, except for the height h, the other parts of the three-phase copper are the same. After bending, all the U-shaped grooves are at the same height position, such as Fig.19 The advantages of this design are: less space is occupied in the height direction, which is beneficial to reduce the axial length of the motor; the length of the enameled wire ends is equal, which is easy to control the paint stripping position, easy to resistance weld on the production line, and easy to cut off the excess wire ends after welding.

[0282] The busbar wiring scheme is as follows:

[0283] The central copper bar connects the starting ends of the C1 to C12 windings;

[0284] The U-phase copper bar connects the end wires of C1, C4, C7, and C10 windings;

[0285] The V-phase copper bar connects the end wires of C2, C5, C8, and C11 windings;

[0286] The W-phase copper bar connects the end wires of C3, C6, C9, and C12 windings;

[0287] The second connection part 22 of the copper bar of the U, V, and W phases is welded to the terminal 3 in a clockwise direction. Fig.10 shown.

[0288] The height difference between layers is 1mm, and the first U-shaped groove of the W-phase copper busbar is 15° away from any U-shaped groove of the center copper busbar.

[0289] The height difference between the V-phase copper bar and the W-phase copper bar is 1mm, and the circumferential difference between terminals 3 is 120°.

[0290] The height difference between the U-phase copper bar and the V-phase copper bar is 1mm, and the circumferential difference between terminals 3 is 120°.

[0291] Make 6 hooks at the end of frame 1, such as Fig.19 As shown, it is hung on the slot of the stator 42 frame 1, as shown in FIG. Fig.25 shown.

[0292] In summary, by welding the enameled wire to this bus structure, the above wiring function can be completed. As a result, the bus achieves the following technical effects: 1) It meets the star wiring of 4 layers in parallel; 2) The one-piece injection-molded annular skeleton (i.e. annular bracket) and strip skeleton (i.e. strip bracket) have a firm structure, good terminal positioning and verticality, which is convenient for ECU installation, and small terminal deformation during installation; 3) The U-shaped grooves of the copper bus are roughly evenly distributed along the circumference and at the same height, which is conducive to the resistance welding of the enameled wire, and the stripping and cutting of the enameled wire on the production line are convenient; 4) The axial height of the bus is small, which is conducive to optimizing the axial length of the motor; 5) The bus adopts the style of U-shaped groove, which is conducive to the integration of the enameled wire into the U-shaped groove; 6) The radial space is reasonably utilized to meet the requirements of products requiring radial distribution of terminals.

[0293] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0294] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0295] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0296] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A busbar, It is characterized in that include: A frame, wherein the frame is an insulating member; A plurality of bus bars, each of the bus bars comprising an arc-shaped main body portion embedded in the frame and extending along the circumferential direction of the frame and a plurality of connecting portions connected to the main body portion and protruding outward from the frame, the plurality of connecting portions being evenly distributed along the circumference of the main body portion and used for connecting the terminal of the stator winding of the motor, and all the bus bars are divided into a neutral bus bar and a plurality of phase bus bars; A plurality of terminals, respectively provided on a plurality of said phase bus bars, for connecting to a power source; The main body of the neutral bus bar and the main bodies of the phase bus bars are sequentially stacked and spaced apart along the axial direction of the frame, and the connecting parts of all the bus bars are evenly distributed along the circumferential direction of the frame; The multiple connection parts of each busbar are sequentially recorded as the xth connection part along the same rotation direction starting from the notch of the main body, and the multiple phase busbars are sequentially recorded as the yth phase busbar along the axial direction of the skeleton, and the first phase busbar is arranged adjacent to the neutral busbar; the axis connection line angle α between the first connection part of the neutral busbar and the first connection part of the adjacent first phase busbar, and the axis connection line angle β between the first connection part of the first phase busbar and the first connection part of the adjacent second phase busbar satisfy: α=360° / (2×m×n)+360°×K / (m×n), β=360°×P / (m×n) and β≠360°×Q / n, m is the number of phase bus bars, n is the number of stator windings per phase, K∈[0,(m×n-1)], P∈(0,(m×n-1)], Q∈[1,m].

2. The busbar according to claim 1, It is characterized in that The m is 3.

3. The busbar according to claim 2, It is characterized in that The axis-connecting line angle γ between the first connection portion of the second phase bus bar and the first connection portion of the third phase bus bar satisfies: γ=360°×P / (m×n) and γ≠360°×Q / n.

4. The busbar according to any one of claims 1 to 3, It is characterized in that The K is 0.

5. The busbar according to any one of claims 1 to 3, It is characterized in that The P and the n satisfy: P=n.

6. The busbar according to any one of claims 1 to 3, It is characterized in that The n is 4.

7. The busbar according to any one of claims 1 to 3, It is characterized in that The first connection portion and the last connection portion of each of the bus bars are located at two ends of the main body.

8. The busbar according to any one of claims 1 to 3, It is characterized in that The number of connection parts of each phase bus bar is n, and each terminal is connected to the xth connection part of the corresponding phase bus bar, where x∈[2, n-1].

9. The busbar according to claim 8, It is characterized in that The x is 2.

10. The busbar according to any one of claims 1 to 3, It is characterized in that The plurality of terminals are evenly arranged along the circumferential direction of the busbar; or The plurality of terminals are arranged non-uniformly along the circumferential direction of the busbar.

11. The busbar according to any one of claims 1 to 3, It is characterized in that The thickness t of all the main body parts is equal; and / or The intervals t2 between adjacent main body parts are equal.

12. The busbar according to any one of claims 1 to 3, It is characterized in that All of the main body portions have equal width; and / or The main bodies of all the phase bus bars are the same; and / or In a projection on a plane perpendicular to the axis of the frame, the main bodies of all the busbars overlap with each other to form a circular ring.

13. A motor, It is characterized in that include: The motor body comprises a stator, wherein the stator is provided with a winding, and the winding has two terminals; and The busbar according to any one of claims 1 to 12, wherein the connecting portion of the busbar is connected to the terminal.

14. The electric machine according to claim 13, It is characterized in that The number of the windings is 12, and the 12 windings are connected in a star connection manner.

15. A vehicle, It is characterized in that include: Vehicle body; and The motor according to claim 13 or 14, mounted in the vehicle body.

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