Terminals, busbars, motors, electric power steering systems and vehicles

Abstract

The present invention provides a terminal, a busbar, a motor, an electric power steering system and a vehicle. The terminal includes: a first connecting section; a supporting section, one end of the supporting section is connected to the first connecting section in a turning direction, and the supporting section is provided with at least one supporting surface; a second connecting section, the second connecting section is connected to the other end of the supporting section in a turning direction, and the second connecting section extends in a direction away from the first connecting section, and the first connecting section, the supporting section and the second connecting section are arranged in sequence along the thickness direction of the first connecting section; wherein, along the thickness direction of the first connecting section, the supporting surface is provided on the side of the supporting section away from the second connecting section, so that the supporting surface is suitable for being supported to provide supporting force to at least a part of the supporting section and the second connecting section. The present invention can provide a supporting force toward the female end to the terminal by adding a supporting section and utilizing the supporting effect of the supporting surface of the supporting section, thereby preventing the terminal from being excessively deformed when plugged into the female end, reducing the difficulty of assembly, and thereby improving the assembly yield of the terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a terminal, a busbar comprising the terminal, a motor comprising the busbar, an electric power steering system comprising the motor, and a vehicle comprising the motor. Background Art

[0002] At present, the terminals of the existing busbars are easily deformed due to pressure when plugged into the female terminals, resulting in high assembly difficulty and low assembly yield. Summary of the invention

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

[0004] A second object of the present invention is to provide a busbar comprising the above-mentioned terminal.

[0005] A third object of the present invention is to provide a motor comprising the above-mentioned busbar.

[0006] A fourth object of the present invention is to provide an electric power steering system including the above-mentioned motor.

[0007] A fifth object of the present invention is to provide a vehicle including the above motor.

[0008] In order to achieve the above-mentioned purpose, the technical solution of the first aspect of the present invention provides a terminal for a busbar of a motor, wherein the terminal comprises: a first connecting section; a supporting section, one end of the supporting section is connected to the first connecting section by a turning point, and the supporting section is provided with at least one supporting surface; a second connecting section, the second connecting section is connected to the other end of the supporting section by a turning point, and the second connecting section extends in a direction away from the first connecting section, and the first connecting section, the supporting section, and the second connecting section are arranged in sequence along the thickness direction of the first connecting section; wherein, along the thickness direction of the first connecting section, the supporting surface is provided on a side of the supporting section away from the second connecting section, so that the supporting surface is suitable for being supported to provide supporting force to at least a portion of the supporting section and the second connecting section.

[0009] The terminal provided by the technical solution of the first aspect of the present invention can provide a supporting force toward the female end of the terminal by adding a supporting section and utilizing the supporting effect of the supporting surface of the supporting section, thereby preventing the terminal from being excessively deformed when plugged into the female end, reducing the difficulty of assembly, and further improving the assembly yield of the terminal.

[0010] Specifically, the terminal includes a first connection section, a support section, and a second connection section. The first connection section is used to connect to the connection portion of the busbar, the second connection section is used to connect to the female end, and the support section is located between the first connection section and the second connection section to play a supporting role. Specifically, the support section is connected to the first connection section at a turning point, and is also connected to the second connection section at a turning point, and the first connection section, the support section, and the second connection section are arranged along the thickness direction of the first connection section. Then, the position of the support section forms a step structure on the terminal, and part of the surface of the step structure forms a support surface. During the assembly process, the support surface will cooperate with the skeleton support of the busbar, so that when it is subsequently plugged into the female end, it is supported by the skeleton, which can effectively prevent the terminal from being overly deformed by pressure.

[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 second connecting section is provided with a supporting protrusion.

[0013] A supporting protrusion is arranged on the second connecting section. When the terminal is subjected to pressure, the supporting protrusion can play a supporting role, thereby preventing the terminal from being unstable and deformed due to local stress concentration.

[0014] In the above technical solution, the supporting protrusion is arranged on at least one side of the second connecting section in the width direction.

[0015] The support protrusion is arranged on at least one side of the second connecting section in the width direction, so that it is convenient to directly use stamping to form an integral body with the terminal, thereby simplifying the processing technology of the terminal. The support protrusion is symmetrically arranged on both sides of the second connecting section in the width direction, which is conducive to balancing the force on the terminal, thereby further improving the stability of the terminal.

[0016] In any of the above technical solutions, the support surface is parallel to the first connecting section; or the support surface is inclined relative to the first connecting section.

[0017] The support surface is parallel to the first connection section, the structure is relatively regular, and it is easy to process and shape, and it is also easy to process and shape the busbar skeleton. At the same time, in this solution, the support force received by the support surface can be parallel to the plugging direction with the female end, and the support reliability is high.

[0018] Alternatively, the support surface may also be arranged to be inclined relative to the first connecting section, and can also provide a component force parallel to the plugging direction with the female end, so as to prevent excessive deformation of the terminal.

[0019] In any of the above technical solutions, the support segment includes at least one L-shaped segment.

[0020] If the support section includes at least one L-shaped section, the support section is a right-angle step structure, and the support surface can be parallel to the first connecting section. Since the first connecting section and the second connecting section are generally perpendicular to each other, when the support section includes one L-shaped section, the terminal as a whole is double-L-shaped, which is stable and simple in structure; when the support section includes two L-shaped sections, the terminal as a whole is triple-L-shaped; when the support section includes more L-shaped sections, the same applies, and so on. Of course, the support section can also be an inclined section, and the support surface can be inclined relative to the first connecting section; or the support section can also include multiple inclined sections, as long as it has a support surface and can support the terminal.

[0021] In any of the above technical solutions, the first connecting section and the second connecting section are perpendicular to each other; the first connecting section is provided with a welding surface; and the second connecting section is provided with an inserting portion.

[0022] The first connecting section and the second connecting section are perpendicular to each other, and the first connecting section and the second connecting section are respectively provided with a welding surface and a plug-in portion, which facilitates both welding connection of the first connecting section with the connecting portion of the bus bar and plug-in connection of the second connecting section with the female end.

[0023] Define the direction of the female end plugging into the terminal as the downward direction. During assembly, the terminal is only subject to the restraining force of the welding position. When the terminal is pulled upward, the welding point and the point of action of the pulling force are not on the same line, so a torque (force multiplied by the arm of force) will be generated, making the terminal easily deformed by the pulling force (that is, making the terminal have the ability to deform upward), which is convenient for reasonably adjusting the relative position of the terminal and the female end. When the terminal is subjected to downward pressure, the supporting surface is supported upward, making it difficult for the terminal to deform and preventing the terminal from deforming downward.

[0024] It is worth noting that the female end slot and the terminal have an interference fit. Therefore, when subjected to downward pressure, the terminal must not be greatly deformed, otherwise the terminal cannot be inserted into the female end slot. Due to the influence of tolerance, accurate positioning cannot be guaranteed when the female end slot and the terminal are plugged in. Usually, the plugging can only be completed by setting a guide on the female end or the terminal. Therefore, the terminal has the ability to deform in the vertical upward direction, that is, the flexibility, which facilitates the accurate alignment of the terminal and the female end opening to meet the assembly requirements of the terminal and the female end.

[0025] In any of the above technical solutions, relative to the end of the second connecting section connected to the supporting section, the first connecting section extends obliquely along the circumferential direction of the busbar.

[0026] In the present solution, the extension direction of the first connecting section is not vertically arranged relative to the end of the second connecting section connected to the supporting section, but is obliquely extended along the circumferential direction of the bus. This is conducive to extending the length of the first connecting section, ensuring that the first connecting section can have sufficient contact surface with the corresponding connecting part of the bus to ensure reliable connection, and is conducive to extending the length of the force arm when the terminal is subjected to force, which is conducive to improving the flexible deformation capacity of the terminal, and is convenient for reasonably designing the length and shape of the supporting section according to needs to optimize product performance.

[0027] The technical solution of the second aspect of the present invention provides a busbar, comprising: a skeleton, which is an insulating part and is provided with a supporting mating surface; a plurality of busbars, each of the busbars comprising a main body embedded in the skeleton and a plurality of connecting parts connected to the main body and protruding from the skeleton; a plurality of terminals as described in any one of the technical solutions of the first aspect, connected to the plurality of busbars, the first connecting section of the terminal being connected to the connecting part, the second connecting section of the terminal being used to connect to a female terminal of a power supply, and the supporting surface of the terminal being in contact with and mating with the supporting mating surface.

[0028] The bus provided by the technical solution of the second aspect of the present invention can utilize the connecting parts of multiple bus bars to connect the various terminals of multiple windings of the motor stator, and utilize the good conductive properties of the bus bars to achieve 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 product production efficiency.

[0029] Specifically, the busbar includes a skeleton, multiple bus bars and multiple terminals. The skeleton is an insulating part and can be formed by injection molding. It supports the multiple bus bars and multiple terminals and isolates adjacent bus bars to perform electrical insulation. The multiple bus bars are conductors. Each bus bar includes a main body and multiple connecting parts. The multiple connecting parts of each bus bar are used to connect the terminals that need to be connected together in the multiple windings of the motor stator, and the electrical connection of these terminals is achieved through the main body to achieve the bus function. The multiple terminals are connected to the multiple bus bars, and each terminal is electrically connected to the terminal connected to the corresponding bus bar. The multiple terminals are connected to the power supply mother terminal to form an electrical circuit to supply power to the multiple windings of the motor stator.

[0030] At the same time, the busbar of the present solution includes the terminals 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.

[0031] It is understandable that the power female end is generally provided with a socket, and is plugged with the terminal. When the terminal is inserted into the socket, the terminal and the power female end are physically in contact, thereby achieving electrical connection. The power female end may be provided on the controller of the motor.

[0032] Specifically, the shapes of the insertion part and the jack of the terminal can be designed as needed. For example, the insertion part is a common rectangular sheet structure, and the jack is a corresponding rectangular hole; or, an avoidance groove is provided on the insertion part, so that the insertion part includes two plugs arranged side by side and spaced from each other, and at the same time, convex points are provided on both sides of the width direction of the insertion part, and a groove or a supporting point is correspondingly provided in the jack. During the process of inserting the terminal into the female end of the power supply, the two plugs can be elastically deformed and approach each other, which is convenient for the quick insertion of the terminal. When the plug is inserted into place, the convex point is stuck in the corresponding groove, or passes over the corresponding supporting point and abuts against the supporting point, which can effectively prevent the terminal from being separated from the female end of the power supply.

[0033] In the above technical solution, 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 the second connecting section of each terminal is embedded in the corresponding strip-shaped bracket.

[0034] 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. At the same time, 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 of separately molding insulating parts and then sleeved on the terminals in the prior art, 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 easy to deform and fail.

[0035] In the above technical solution, the strip-shaped bracket is provided with a slot, and the terminal is plugged into the slot; the slot is provided with an avoidance gap, and the avoidance gap is used to avoid the supporting section and the first connecting section of the terminal; the strip-shaped bracket is provided with at least one supporting matching surface, and at least a portion of at least one supporting matching surface is located in the slot.

[0036] A slot is provided on the strip bracket, and the slot has an avoidance gap, which ensures that the terminal can be directly inserted into the slot after the frame is formed. When the supporting surface of the terminal contacts and matches with the supporting mating surface of the strip bracket, it indicates that the terminal is assembled in place, thereby realizing the assembly of the terminal and the frame, and the assembly method is simple and the operation is convenient. In addition, the supporting surface and the supporting mating surface also play a positioning role in the assembly process, which can provide a sense of being in place, prompting that the assembly is in place, further reducing the difficulty of assembly, and playing a certain protective role for the terminal and the frame.

[0037] The number of the supporting mating surfaces may be one or more, which are equal to and correspond to the number of the supporting surfaces of the terminal. In the case where the number of the supporting mating surfaces is one, the supporting mating surface may be completely located in the slot; or part of it may be located in the slot and part of it may be located outside the slot (in this case, the bottom wall of the slot forms part of the supporting mating surface, and the other part of the supporting mating surface extends out of the slot through the avoidance notch). In the case where the number of the supporting mating surfaces is more than one, in addition to setting the supporting mating surface in the slot, several supporting mating surfaces may also be set outside the slot.

[0038] In the above technical solution, the terminal is gap-matched with the slot.

[0039] The clearance between the terminal and the slot makes it easy for the terminal to deform in the circumferential and radial directions. This enables the terminal to deform in the circumferential and radial directions, that is, flexibility, and also facilitates accurate alignment of the terminal with the female end opening to meet the assembly requirements of the terminal and the female end.

[0040] In the above technical solution, a limiting groove is provided at the entrance of the slot, and the limiting groove is used to accommodate the supporting protrusion of the terminal.

[0041] The limiting groove at the entrance of the slot cooperates with the supporting protrusion of the terminal to support the terminal, thereby preventing the terminal from becoming unstable and deforming due to local stress concentration.

[0042] In the above technical solution, the supporting protrusion and the limiting groove are loosely matched.

[0043] The support protrusion and the limit groove are matched with each other in a clearance manner, and the deformation of the terminal in the circumferential and radial directions is not restricted. This ensures that the terminal has the ability to deform in the circumferential and radial directions, that is, flexibility, and also facilitates accurate alignment of the terminal with the female end opening to meet the assembly requirements of the terminal and the female end.

[0044] In the above technical solution, the gap between the terminal and the slot along the thickness direction of the terminal is recorded as the first gap; the gap between the support protrusion and the limit groove along the thickness direction of the terminal is recorded as the second gap; the width of the second gap is smaller than the width of the first gap.

[0045] The first gap is relatively large, which is conducive to better deformation of the terminal in the circumferential, radial and vertical directions; while the second gap is relatively small, which is conducive to preventing the second connecting section from bending and becoming unstable and deformed when subjected to pressure.

[0046] In any of the above technical solutions, at least one of the strip-shaped brackets is provided with a positioning identification portion, and the positioning identification portion includes a reinforcing protrusion, and the reinforcing protrusion is connected to the ring-shaped bracket and the strip-shaped bracket.

[0047] At least one strip-shaped bracket is provided with a positioning identification portion, so that multiple strip-shaped 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.

[0048] The positioning identification portion includes a reinforcing protrusion, and the reinforcing protrusion is connected to the annular bracket and the strip bracket, which can improve the connection strength between the annular bracket and the strip bracket, and further improve the strength and reliability of the skeleton.

[0049] In the above technical solution, the frame is provided with a plurality of hooks, at least one of the hooks is provided with an avoidance groove, and the avoidance groove is used to enable the hook to be suitable for elastic deformation.

[0050] A plurality of hooks are arranged on the frame to facilitate the hooking and matching of the busbar and the stator to achieve assembly. An avoidance groove is provided on at least one hook to facilitate elastic deformation of the hook during assembly with the stator, thereby reducing assembly difficulty and improving stability after assembly.

[0051] In the above technical solution, the hook includes: a fixing portion, which is connected to the frame; and a hooking portion, which is connected to the fixing portion; wherein the hooking portion of at least one of the hooks includes a plurality of elastic buckles arranged at intervals, and the avoidance groove is formed between adjacent elastic buckles.

[0052] The hook includes a fixing part and a hooking part, and the fixing part is connected to the frame to realize the connection function between the hook and the frame. The hooking part is connected to the fixing part and is used to hook with the stator to realize the hooking function. Among them, the hooking part of at least one hook includes a plurality of elastic buckles, and the plurality of elastic buckles are arranged at intervals to form an avoidance groove. During the assembly process, the adjacent elastic buckles can be squeezed to move closer to each other, thereby reducing the size of the hook, so that the hook can quickly and smoothly realize the hooking with the stator. After the hooking is completed, the elastic buckle will reset and deform, and fit tightly with the stator, thereby improving the connection strength.

[0053] In the above technical solution, the plurality of elastic buckles are arranged side by side; or the plurality of elastic buckles are arranged in a ring shape.

[0054] Multiple elastic buckles are arranged side by side, with a simple structure and easy processing and forming. In addition, the hook is hooked in one direction, and the hook mainly shows elastic changes in the width direction during assembly. At this time, the corresponding matching structure on the stator only needs to be provided with a slot, and it can be provided at the edge of the stator, with a simple structure and convenient assembly.

[0055] When multiple elastic buckles are arranged in a ring shape, the hook forms an elastic column buckle and hooks in multiple directions. During the assembly process, the hook mainly changes in thickness. At this time, the corresponding matching structure on the stator needs to be provided with a clamping hole, so that the connection is more reliable and the hook is not easy to fall out.

[0056] In the above technical solution, one end of the hooking portion connected to the fixing portion protrudes from the fixing portion and is connected to the frame.

[0057] Compared with the solution in which only the fixed part is connected to the frame, the hook part in this solution is also connected to the frame, and the connection direction with the frame is different, which not only increases the connection area between the hook and the frame, but also increases the direction of the connecting force between the hook and the frame, thereby further improving the connection strength between the hook and the frame, further improving the reliability of the hook, and effectively preventing the hook from cracking, breaking or falling off.

[0058] In the above technical solution, the strip-shaped support of the skeleton protrudes outward from the annular support of the skeleton along the radial direction, and the hook is connected to the strip-shaped support.

[0059] In the above technical solution, the hook is connected to the radial outer side surface of the strip-shaped bracket.

[0060] The hook is connected to the strip-shaped bracket, and further connected to the radial outer side of the strip-shaped bracket, which is conducive to the hook being arranged radially outward compared to being connected to the ring-shaped bracket. Since the space radially outward of the stator is relatively sufficient, when the hook is radially outward, the assembly space is more sufficient, the assembly field of view is better, and the assembly is more convenient. At the same time, the cooperation between the hook and the stator can play a certain role in limiting the strip-shaped bracket, and thus can also indirectly play a certain role in limiting the terminal, thereby further improving the stability of the terminal.

[0061] In the above technical solution, the top end surface of the hook is inclined relative to the radial outer side surface of the strip-shaped bracket, and the top end surface extends obliquely from the inside to the outside toward the hooking portion of the hook.

[0062] In this solution, the top surface of the hook can avoid the upper structure and prevent interference with other structures.

[0063] In the above technical solution, the plurality of hooks are used to hook and cooperate with the slots on the stator, and a part of the plurality of hooks are provided with the avoidance slots. The hooks provided with the avoidance slots are marked as first hooks, and the other hooks are marked as second hooks; wherein the total width B1 of the first hook is greater than the width B3 of the slot and greater than the total width B2 of the second hook.

[0064] In this solution, the second hook without the avoidance groove can be easily inserted into the corresponding groove without interference, while the first hook with the avoidance groove interferes with the corresponding groove and needs to be deformed by side extrusion to reduce the total width of the first hook before it can be inserted into the corresponding groove. At the same time, after the first hook is inserted into the corresponding groove, due to the effect of elastic force, the side of the first hook fits tightly with the side of the corresponding groove, and has a certain bonding force, so the assembly of the busbar will be more reliable.

[0065] The technical solution of the third 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 second aspect, the connecting part of the bus is connected to the terminal.

[0066] The motor provided by the technical solution of the third aspect of the present invention includes the bus described in any one of the technical solutions of the second aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0067] In the above technical solution, the number of the windings is 12, and the 12 windings are connected in a star connection manner.

[0068] Since 12 windings have 24 joints, a star connection is used, and 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, 12 are connected together, respectively, 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. Of course, the number of windings is not limited to 12, and can also be 9, 15, etc.; the connection method of the windings is not limited to the above method, and can also be a triangle connection or other methods.

[0069] The technical solution of the fourth aspect of the present invention provides an electric power steering system, comprising: a motor as described in any one of the technical solutions of the third aspect; and a control device electrically connected to the motor.

[0070] The electric power steering system provided by the technical solution of the fourth aspect of the present invention includes the motor described in the technical solution of the third aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0071] Specifically, the control device includes but is not limited to a vehicle speed sensor, an electronic control unit (ECU, Electronic Control Unit, also known as "driving computer", "on-board computer", etc.), etc.

[0072] It is understandable that the Electric Power Steering (EPS) is a power steering system that directly relies on the motor to provide auxiliary torque. Compared with the traditional hydraulic power steering system HPS (Hydraulic Power Steering), the EPS system has many advantages. EPS is mainly composed of a torque sensor, a vehicle speed sensor, a motor, a reduction mechanism, and an electronic control unit (ECU).

[0073] The technical solution of the fifth 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 third aspect, installed in the vehicle body.

[0074] The vehicle provided by the technical solution of the fifth aspect of the present invention includes the motor described in the technical solution of the third aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0075] 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

[0076] 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:

[0077] Figure 1 is a schematic diagram of a top view of a busbar according to some embodiments of the present invention;

[0078] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0079] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure along the BB direction;

[0080] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure in the CC direction;

[0081] Figure 5 yes Figure 3 Schematic diagram of the cross-sectional structure in the middle DD direction;

[0082] Figure 6is a schematic diagram of the structure of the busbar without terminals according to some embodiments of the present invention;

[0083] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure along the EE direction;

[0084] Figure 8 yes Figure 6 Schematic diagram of the cross-sectional structure in the FF direction;

[0085] Fig. 9 yes Figure 6 Schematic diagram of the cross-sectional structure along the GG axis;

[0086] Fig.10 is a three-dimensional structural schematic diagram of a terminal according to some embodiments of the present invention;

[0087] Fig.11 yes Fig.10 The left side structural diagram of the terminal shown;

[0088] Fig.12 yes Fig.10 The main structural diagram of the terminal shown;

[0089] Fig.13 yes Fig.10 A schematic diagram of the top view of the terminal shown;

[0090] Fig.14 yes Fig.10 A schematic diagram of the three-dimensional structure of the terminal from another perspective;

[0091] Fig.15 yes Fig.10 A schematic diagram of the three-dimensional structure of the terminal from another viewing angle;

[0092] Fig.16 is a schematic diagram of a three-dimensional structure of a bus bar without terminals according to some embodiments of the present invention;

[0093] Fig.17 yes Fig.16 A schematic diagram of another viewing angle of the structure;

[0094] Fig.18 is a schematic diagram of a three-dimensional structure of a busbar according to some embodiments of the present invention;

[0095] Fig.19 is a schematic diagram of a partial cross-sectional structure of a motor according to some embodiments of the present invention;

[0096] Fig. 20 is a schematic block diagram of an electric power steering system according to some embodiments of the present invention;

[0097] Fig.21is a schematic block diagram of a vehicle according to some embodiments of the present invention.

[0098] in, Figures 1 to 21 The corresponding relationship between the reference numerals and component names in the figure is:

[0099] 1 terminal, 11 first connecting section, 111 welding surface, 12 second connecting section, 121 supporting protrusion, 122 plug-in portion, 13 supporting section, 131 supporting surface;

[0100] 2 skeleton, 21 annular bracket, 22 strip bracket, 221 slot, 2211 limiting groove, 222 supporting matching surface, 223 avoiding notch, 224 reinforcing protrusion, 226 first gap, 227 second gap, 23 hook, 231 fixing part, 232 hooking part, 2321 elastic buckle, 233 avoiding groove, 234 top surface;

[0101] 3 bus bar, 31 main body, 32 connection part;

[0102] 4 stators, 41 slots;

[0103] 5 electric power steering system, 51 motor, 52 control device;

[0104] 6 vehicles, 61 bodies. DETAILED DESCRIPTION

[0105] 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.

[0106] 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.

[0107] Refer to the following Figures 1 to 21 Terminals, bus bars, motors, electric power steering systems and vehicles according to some embodiments of the present invention are described.

[0108] The terminal 1 (such as Fig.10 , Fig.14 and Fig.15 As shown), a busbar for a motor 51, the terminal 1 comprises: a first connecting section 11, a supporting section 13 and a second connecting section 12, as shown Figure 2 shown.

[0109] Specifically, one end of the support section 13 is connected to the first connecting section 11. Figure 2 and Fig.11 As shown, the support segment 13 is provided with at least one support surface 131 .

[0110] The second connecting section 12 is connected to the other end of the supporting section 13 by a turning point, and the second connecting section 12 extends in a direction away from the first connecting section 11 . The first connecting section 11 , the supporting section 13 , and the second connecting section 12 are arranged in sequence along the thickness direction of the first connecting section 11 .

[0111] Among them, along the thickness direction of the first connecting section 11, the supporting surface 131 is arranged on the side of the supporting section 13 away from the second connecting section 12, such as Figure 2 As shown, the support surface 131 is suitable for being supported to provide a supporting force to at least a portion of the support segment 13 and the second connecting segment 12 .

[0112] The terminal 1 provided in the embodiment of the first aspect of the present invention, by adding a support section 13, can provide a supporting force toward the female end to the terminal 1 by utilizing the supporting effect of the supporting surface 131 of the support section 13, thereby preventing the terminal 1 from being excessively deformed when plugged into the female end, reducing the difficulty of assembly, and further improving the assembly yield of the terminal 1.

[0113] Specifically, the terminal 1 includes a first connection section 11, a support section 13 and a second connection section 12. The first connection section 11 is used to connect to the connection portion 32 of the busbar 3, and the second connection section 12 is used to connect to the female end. The support section 13 is located between the first connection section 11 and the second connection section 12 to play a supporting role. Specifically, the support section 13 is connected to the first connection section 11 and is also connected to the second connection section 12. The first connection section 11, the support section 13 and the second connection section 12 are arranged along the thickness direction of the first connection section 11. Then, the position of the support section 13 forms a step structure on the terminal 1, and part of the surface of the step structure forms a support surface 131. During the assembly process, the support surface 131 will cooperate with the support of the skeleton 2 of the busbar. In this way, when it is subsequently plugged into the female end, it is supported by the skeleton 2, which can effectively prevent the terminal 1 from being deformed excessively due to pressure.

[0114] It is understandable that the power female end is generally provided with a socket, which is plugged into the terminal 1. When the terminal 1 is inserted into the socket, the terminal 1 and the power female end are physically in contact, thereby achieving electrical connection. The power female end can be provided on the controller of the motor 51.

[0115] Specifically, the shapes of the plug-in portion 122 and the plug hole of the terminal 1 can be designed as required.

[0116] For example: the plug-in portion 122 is a common rectangular sheet structure (such as Fig.10 As shown), the jack is a corresponding rectangular hole.

[0117] Alternatively, an avoidance groove is provided on the plug-in portion 122, so that the plug-in portion 122 includes two plug-ins arranged side by side and spaced apart from each other, and at the same time, protrusions are provided on both sides of the width direction of the plug-in portion 122, and corresponding grooves or support points are provided in the socket. During the process of inserting the terminal 1 into the power female end, the two plug-ins can be elastically deformed and approach each other, which is convenient for quick insertion of the terminal 1. When the plug-in is inserted into place, the protrusion is stuck in the corresponding groove, or passes over the corresponding support point and abuts against the support point, which can effectively prevent the terminal 1 from detaching from the power female end.

[0118] In some embodiments of the present invention, further, the second connecting section 12 is provided with a supporting protrusion 121, such as Figure 3 and Fig.12 shown.

[0119] A supporting protrusion 121 is provided on the second connecting section 12 , and when the terminal 1 is subjected to pressure, the supporting protrusion 121 can play a supporting role, thereby preventing the terminal 1 from being unstable and deformed due to local stress concentration.

[0120] Furthermore, the supporting protrusion 121 is provided on at least one side of the second connecting section 12 in the width direction, such as Figure 3 and Fig.12 shown.

[0121] The support protrusion 121 is arranged on at least one side of the second connecting section 12 in the width direction, so that it is convenient to directly form it integrally with the terminal 1 by stamping, thereby simplifying the processing technology of the terminal 1. The support protrusion 121 is symmetrically arranged on both sides of the second connecting section 12 in the width direction, which is conducive to balancing the force on the terminal 1, thereby further improving the stability of the terminal 1.

[0122] In some embodiments of the present invention, the support surface 131 and the first connecting section 11 are parallel to each other. Figure 2 shown.

[0123] The support surface 131 is parallel to the first connection section 11, and the structure is relatively regular, which is convenient for processing and forming, and also convenient for processing and forming the busbar skeleton 2. At the same time, in this solution, the support force received by the support surface 131 can be parallel to the plugging direction with the female end, and the support reliability is high.

[0124] Further, the support section 13 includes at least one L-shaped section, such as Figure 2 and Fig.11 shown.

[0125] The support section 13 includes at least one L-shaped section, and the support section 13 is a right-angle step structure, and the support surface 131 can be parallel to the first connecting section 11. Since the first connecting section 11 and the second connecting section 12 are generally perpendicular to each other, when the support section 13 includes one L-shaped section, the terminal 1 is a double L-shaped as a whole, which is stable and has a simple structure; when the support section 13 includes two L-shaped sections, the terminal 1 is a triple L-shaped as a whole; when the support section 13 includes more L-shaped sections, the same applies, and so on.

[0126] In some other embodiments of the present invention, the supporting surface 131 is inclined relative to the first connecting section 11 .

[0127] The supporting surface 131 may also be arranged to be inclined relative to the first connecting section 11 , and can also provide a component force parallel to the plugging direction with the female end, so as to prevent the terminal 1 from being excessively deformed.

[0128] Furthermore, the support segment 13 may be an inclined segment, and the support surface 131 may be inclined relative to the first connection segment 11 ; or the support segment 13 may include a plurality of inclined segments, as long as it has the support surface 131 and can support the terminal 1 .

[0129] In any of the above embodiments, the first connecting section 11 and the second connecting section 12 are perpendicular to each other. Figure 2 and Fig.11 As shown, the first connecting section 11 is provided with a welding surface 111, and the second connecting section 12 is provided with a plug-in portion 122 (as shown in FIG. Fig.10 , Fig.14 and Fig.15 shown).

[0130] The first connecting section 11 and the second connecting section 12 are perpendicular to each other, and the first connecting section 11 and the second connecting section 12 are respectively provided with a welding surface 111 and a plug-in portion 122, which facilitates the first connecting section 11 to be welded to the connecting portion 32 of the busbar 3, and also facilitates the second connecting section 12 to be plug-in connected to the female end.

[0131] Define the direction in which the female end is inserted into the terminal 1 as the downward direction. During the assembly process, the terminal 1 is only subject to the constraint force of the welding position. When the terminal 1 is pulled upward, the welding point and the point of action of the pulling force are not on the same line, so a torque (force multiplied by the arm of force) will be generated, making the terminal 1 easily deformed by the pulling force (that is, making the terminal 1 have the ability to deform upward), which is convenient for reasonably adjusting the relative position of the terminal 1 and the female end. When the terminal 1 is subjected to downward pressure, the support surface 131 is supported upward, making it difficult for the terminal 1 to deform, and preventing the terminal 1 from deforming downward.

[0132] It is worth noting that the female end slot is interference fit with the terminal 1. Therefore, when subjected to downward pressure, the terminal 1 must not be greatly deformed, otherwise the terminal 1 cannot be inserted into the female end slot. Due to the influence of tolerance, the accurate positioning cannot be guaranteed when the female end slot is plugged into the terminal 1. Usually, the plugging can only be completed by setting a guide on the female end or the terminal 1. Therefore, the terminal 1 has the ability to deform in the vertical upward direction, that is, the flexibility, which facilitates the accurate alignment of the terminal 1 with the female end opening to meet the assembly requirements of the terminal 1 and the female end.

[0133] In some embodiments, further, relative to one end of the second connecting section 12 connected to the supporting section 13, the first connecting section 11 extends obliquely along the circumferential direction of the busbar, such as Fig.13 shown.

[0134] In the present solution, the extension direction of the first connecting section 11 is not vertically arranged relative to the end of the second connecting section 12 connected to the support section 13, but is obliquely extended along the circumferential direction of the bus. This is beneficial to extending the length of the first connecting section 11, ensuring that the first connecting section 11 can have a sufficient contact surface with the corresponding connecting portion 32 of the bus to ensure reliable connection, and is beneficial to extending the length of the force arm when the terminal 1 is subjected to force, which is beneficial to improving the flexible deformation capacity of the terminal 1, and is convenient for reasonably designing the length and shape of the support section 13 according to needs to optimize product performance.

[0135] The busbar provided by the embodiment of the second aspect of the present invention is as follows: Figure 1 , Figure 6 and Fig.18 As shown, it includes: a skeleton 2, a plurality of bus bars 3 and a plurality of terminals 1.

[0136] Specifically, the frame 2 is an insulating member, and the frame 2 is provided with a supporting mating surface 222, such as Figure 2 , Fig.16 and Fig.17 shown.

[0137] Each bus bar 3 includes a main body 31 embedded in the frame 2 and a plurality of connecting parts 32 connected to the main body 31 and protruding from the frame 2. Figure 2 and Figure 3 shown.

[0138] A plurality of terminals 1 are connected to a plurality of bus bars 3, and a first connection section 11 of the terminal 1 is connected to a connection portion 32, such as Figure 2 The second connection section 12 of the terminal 1 is used to connect to the female terminal of the power supply, and the supporting surface 131 of the terminal 1 is in contact with the supporting mating surface 222 .

[0139] The bus provided in the embodiment of the second aspect of the present invention can utilize the connecting parts 32 of multiple bus bars 3 to connect the various terminals of multiple windings of the stator 4 of the motor 51, and utilize the good conductive performance of the bus bar 3 to achieve 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.

[0140] Specifically, the busbar includes a skeleton 2, multiple bus bars 3 and multiple terminals 1. The skeleton 2 is an insulating part and can be formed by injection molding. It supports the multiple bus bars 3 and the multiple terminals 1, and isolates adjacent bus bars 3 to play an electrical insulation role. The multiple bus bars 3 are all conductors. Each bus bar 3 includes a main body 31 and multiple connecting parts 32. The multiple connecting parts 32 of each bus bar 3 are used to connect the terminals that need to be connected together in the multiple windings of the motor stator 4, and the electrical connection of these terminals is realized through the main body 31 to realize the bus function. The multiple terminals 1 are connected to the multiple bus bars 3, and each terminal 1 is electrically connected to the terminal connected to the corresponding bus bar 3. The multiple terminals 1 are connected to the power supply mother terminal to form an electrical circuit to supply power to the multiple windings of the stator 4 of the motor 51.

[0141] At the same time, the busbar of the present solution includes the terminal 1 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.

[0142] Furthermore, the skeleton 2 includes a ring-shaped support 21 and a plurality of strip-shaped supports 22 integrally connected to the ring-shaped support 21, such as Figure 3 , Figure 7 , Fig.16 and Fig.17 The main body 31 of all busbars 3 is embedded in the annular bracket 21, and the plurality of strip-shaped brackets 22 correspond to the plurality of terminals 1 one by one, and a portion of the second connection section 12 of each terminal 1 is embedded in the corresponding strip-shaped bracket 22, as shown in FIG. Fig.18 shown.

[0143] The skeleton 2 includes an annular bracket 21 and a strip bracket 22. The annular bracket 21 is used to support multiple bus bars 3 and ensure the insulation between the multiple bus bars 3. The multiple strip brackets 22 are used to support multiple terminals 1 and ensure the electrical insulation between the terminals 1 and other structures. At the same time, since the annular bracket 21 and the multiple strip brackets 22 are connected in one piece, they can be formed into an integrated structure by integral molding during the injection molding process, so the connection is more reliable. Compared with the solution of molding an insulating part separately and then sleeved on the terminal 1 in the prior art, the strip bracket 22 of this solution can play a good supporting and limiting role for the terminal 1, effectively preventing the terminal 1 from shaking and deforming, ensuring that the terminal 1 has good positioning and verticality, and a reliable structure, so that when the controller PIN is inserted into the terminal 1, the part of the terminal 1 exposed to the strip bracket 22 is not easy to deform and fail.

[0144] Furthermore, the strip-shaped bracket 22 is provided with a slot 221, such as Figure 2 , Figure 3 , Fig.16 and Fig.17 As shown. The terminal 1 is plugged into the slot 221. The slot 221 is provided with an avoidance notch 223. Fig. 9 and Fig.16 As shown, the avoidance gap 223 is used to avoid the support section 13 and the first connecting section 11 of the terminal 1. The strip-shaped bracket 22 is provided with at least one support matching surface 222, and at least a part of the at least one support matching surface 222 is located in the slot 221.

[0145] A slot 221 is provided on the strip-shaped bracket 22, and the slot 221 has an avoidance notch 223, which ensures that the terminal 1 can be directly inserted into the slot 221 after the frame 2 is formed. When the support surface 131 of the terminal 1 contacts and matches with the support mating surface 222 of the strip-shaped bracket 22, it indicates that the terminal 1 is assembled in place, thereby realizing the assembly of the terminal 1 and the frame 2, and the assembly method is simple and the operation is convenient. In addition, the support surface 131 and the support mating surface 222 also play a positioning role in the assembly process, which can provide a sense of being in place, prompting that the assembly is in place, further reducing the difficulty of assembly, and playing a certain protective role for the terminal 1 and the frame 2.

[0146] The number of the supporting mating surface 222 can be one or more, which is equal to and corresponds to the number of the supporting surfaces 131 of the terminal 1. In the case where the number of the supporting mating surface 222 is one, the supporting mating surface 222 can be completely located in the slot 221; or it can be partially located in the slot 221 and partially located outside the slot 221. In this case, the bottom wall of the slot 221 forms a part of the supporting mating surface 222, and the other part of the supporting mating surface 222 passes through the avoidance notch 223 and extends out of the slot 221. Fig.16In the case where there are multiple supporting mating surfaces 222, in addition to providing the supporting mating surface 222 inside the slot 221, several supporting mating surfaces 222 may also be provided outside the slot 221, such as Fig.16 A plurality of steps are added below the supporting mating surface 222 to form a plurality of supporting mating surfaces 222 .

[0147] Furthermore, the terminal 1 is clearance-matched with the slot 221, such as Figure 4 and Figure 5 shown.

[0148] The clearance fit between terminal 1 and slot 221 makes it easy for terminal 1 to deform in the circumferential and radial directions. This enables terminal 1 to have the ability to deform in the circumferential and radial directions, that is, flexibility, and also facilitates accurate alignment of terminal 1 with the female end opening to meet the assembly requirements of terminal 1 and the female end.

[0149] Furthermore, a limiting groove 2211 is provided at the entrance of the slot 221. Figure 7 , Fig.16 and Fig.17 As shown, the limiting groove 2211 is used to accommodate the supporting protrusion 121 of the terminal 1. Figure 3 and Fig.18 shown.

[0150] The limiting groove 2211 at the entrance of the slot 221 cooperates with the supporting protrusion 121 of the terminal 1 to support the terminal 1, thereby preventing the terminal 1 from being unstable and deformed due to local stress concentration.

[0151] Among them, the support protrusion 121 and the limiting groove 2211 are clearance-matched, such as Figure 5 shown.

[0152] The support protrusion 121 and the limiting groove 2211 are loosely matched, and do not limit the deformation of the terminal 1 in the circumferential and radial directions. This ensures that the terminal 1 has the ability to deform in the circumferential and radial directions, that is, flexibility, and also facilitates the accurate alignment of the terminal 1 with the female end opening to meet the assembly requirements of the terminal 1 and the female end.

[0153] Specifically, the gap between the terminal 1 and the slot 221 along the thickness direction of the terminal 1 is recorded as a first gap 226; the gap between the support protrusion 121 and the limiting groove 2211 along the thickness direction of the terminal 1 is recorded as a second gap 227; the width of the second gap 227 is smaller than the width of the first gap 226, such as Figure 5 shown.

[0154] The first gap 226 is relatively large, which is conducive to better deformation of the terminal 1 in the circumferential, radial and vertical directions; while the second gap 227 is relatively small, which is conducive to preventing the second connecting section 12 from bending and becoming unstable and deformed when subjected to pressure.

[0155] In any of the above embodiments, at least one strip-shaped bracket 22 is provided with a positioning identification portion, and the positioning identification portion includes a reinforcing protrusion 224, such as Figure 1 , Fig.16 and Fig.17 As shown, the reinforcing protrusion 224 is connected to the annular support 21 and the strip support 22 .

[0156] At least one strip-shaped bracket 22 is provided with a positioning identification portion, so that the multiple strip-shaped brackets 22 are not completely consistent in appearance, which can play a role in preventing mistakes in assembly, facilitate rapid identification of each bus bar 3, and then locate the relative position between the bus bar and the stator winding, which is conducive to further improving production efficiency.

[0157] The positioning identification portion includes a reinforcing protrusion 224 , and the reinforcing protrusion 224 is connected to the annular bracket 21 and the strip bracket 22 , which can improve the connection strength between the annular bracket 21 and the strip bracket 22 , and further improve the strength and reliability of the skeleton 2 .

[0158] In some embodiments of the present invention, further, the frame 2 is provided with a plurality of hooks 23, such as Fig.16 and Fig.17 At least one hook 23 is provided with an escape groove 233, as shown in FIG. Figure 3 and Fig.16 As shown, the avoidance groove 233 is used to allow the hook 23 to be suitable for elastic deformation.

[0159] A plurality of hooks 23 are provided on the frame 2 to facilitate hooking and matching of the busbar with the stator 4 to achieve assembly. An avoidance groove 233 is provided on at least one hook 23 to facilitate elastic deformation of the hook 23 during assembly with the stator 4, thereby reducing assembly difficulty and improving stability after assembly.

[0160] Specifically, the hook 23 includes a fixing portion 231 and a hooking portion 232. Figure 7 The fixing portion 231 is connected to the frame 2 , and the hooking portion 232 is connected to the fixing portion 231 .

[0161] The hooking portion 232 of at least one hook 23 includes a plurality of elastic buckles 2321 arranged at intervals, such as Figure 7 As shown, an avoidance groove 233 is formed between adjacent elastic buckles 2321 .

[0162] The hook 23 includes a fixing portion 231 and a hooking portion 232. The fixing portion 231 is connected to the frame 2 to realize the connection function between the hook 23 and the frame 2. The hooking portion 232 is connected to the fixing portion 231 and is used to hook with the stator 4 to realize the hooking function. Among them, the hooking portion 232 of at least one hook 23 includes a plurality of elastic buckles 2321, and the plurality of elastic buckles 2321 are arranged at intervals to form an avoidance groove 233. During the assembly process, the adjacent elastic buckles 2321 can be squeezed and moved closer to each other, thereby reducing the size of the hook 23, so that the hook 23 can quickly and smoothly realize the hooking cooperation with the stator 4. After the hooking is completed, the elastic buckle 2321 will reset and deform, and fit tightly with the stator 4, thereby improving the connection strength.

[0163] In some embodiments, multiple elastic buckles 2321 are arranged side by side, such as Figure 7 shown.

[0164] The plurality of elastic buckles 2321 are arranged side by side, and the structure is simple and easy to process and form. In addition, the hook 23 is hooked in one direction, and the hook 23 mainly shows elastic changes in the width direction during the assembly process. At this time, the corresponding matching structure on the stator 4 only needs to be provided with a slot 41, and it can be provided at the edge of the stator 4, which has a simple structure and is relatively convenient to assemble.

[0165] In other embodiments, a plurality of elastic buckles 2321 are arranged in a ring shape.

[0166] Multiple elastic buckles 2321 are arranged in a ring shape, so the hook 23 forms an elastic column buckle, hooked in multiple directions, and the hook 23 mainly shows a change in thickness during the assembly process. At this time, the corresponding matching structure on the stator 4 needs to be provided with a clamping hole, the connection is more reliable, and the hook 23 is not easy to fall out.

[0167] Furthermore, one end of the hook portion 232 connected to the fixing portion 231 protrudes from the fixing portion 231. Fig.16 As shown, and connected to the skeleton 2.

[0168] Compared with the solution in which only the fixing part 231 is connected to the skeleton 2, the hooking part 232 in this solution is also connected to the skeleton 2, and the connection direction with the skeleton 2 is different, which not only increases the connection area between the hook 23 and the skeleton 2, but also increases the direction of the connecting force between the hook 23 and the skeleton 2, thereby further improving the connection strength between the hook 23 and the skeleton 2, further improving the reliability of the hook 23, and effectively preventing the hook 23 from cracking, breaking or falling off.

[0169] In some embodiments of the present invention, further, the strip-shaped bracket 22 of the skeleton 2 protrudes outward from the annular bracket 21 along the radial direction of the annular bracket 21, and the hook 23 is connected to the strip-shaped bracket 22, such as Figure 6 , Fig.16 and Fig.17 shown.

[0170] Furthermore, the hook 23 is connected to the radial outer side of the strip-shaped bracket 22, such as Fig.16 and Fig.17 shown.

[0171] The hook 23 is connected to the strip bracket 22, and further connected to the radial outer side of the strip bracket 22, which is conducive to the hook 23 being arranged radially outward compared to being connected to the ring bracket 21. Since the space radially outward of the stator 4 is relatively sufficient, when the hook 23 is radially outward, the assembly space is more sufficient, the assembly field of view is better, and the assembly is more convenient. At the same time, the cooperation between the hook 23 and the stator 4 can play a certain role in limiting the strip bracket 22, and thus can also indirectly play a certain role in limiting the terminal 1, thereby further improving the stability of the terminal 1.

[0172] Furthermore, the top end surface 234 of the hook 23 is inclined relative to the radial outer side surface of the strip-shaped bracket 22, such as Fig.16 and Fig.19 As shown, the top end surface 234 extends obliquely from the inside to the outside toward the hook portion 232 close to the hook 23.

[0173] The top surface 234 of the hook 23 can avoid the upper structure and prevent interference with other structures.

[0174] In the above embodiment, further, the plurality of hooks 23 are used to hook and cooperate with the slots 41 on the stator 4, such as Fig.19 A portion of the plurality of hooks 23 is provided with an escape groove 233 , the hooks 23 provided with the escape groove 233 are denoted as first hooks, and the other hooks 23 are denoted as second hooks.

[0175] The total width B1 of the first hook>the width B3 of the slot 41>the total width B2 of the second hook. Figure 8 and Fig. 9 shown.

[0176] In this solution, the second hook without the avoidance groove 233 can be easily inserted into the corresponding groove 41 without interference, while the first hook with the avoidance groove 233 interferes with the corresponding groove 41 and needs to be deformed by side extrusion to reduce the total width of the first hook before it can be inserted into the corresponding groove 41. At the same time, after the first hook is inserted into the corresponding groove 41, due to the effect of elastic force, the side of the first hook fits tightly with the side of the corresponding groove 41, and has a certain bonding force, so the assembly of the busbar will be more reliable.

[0177] The motor 51 provided in the embodiment of the third aspect of the present invention is as follows: Fig.19As shown, it includes: a motor body and a busbar as in any one of the second aspect embodiments. Specifically, the motor body includes a stator 4, the stator 4 is provided with a winding, and the winding has two terminals. The connecting portion 32 of the busbar is connected to the terminal.

[0178] The motor 51 provided in the embodiment of the third aspect of the present invention includes the busbar of any one of the embodiments of the second aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0179] In one embodiment, the number of windings is 12, and the 12 windings are connected in a star connection manner.

[0180] Since 12 windings have 24 joints, a star connection is used, and 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, 12 are connected together, respectively, 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. Of course, the number of windings is not limited to 12, and can also be 9, 15, etc.; the connection method of the windings is not limited to the above method, and can also be a triangle connection or other methods.

[0181] The electric power steering system 5 provided by the embodiment of the fourth aspect of the present invention is as follows: Fig. 20 As shown, it includes: a motor 51 and a control device 52 as in any one of the embodiments of the third aspect, and the control device 52 is electrically connected to the motor 51.

[0182] The electric power steering system 5 provided in the embodiment of the fourth aspect of the present invention includes the motor 51 of the embodiment of the third aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0183] Specifically, the control device 52 includes but is not limited to a vehicle speed sensor, an electronic control unit (ECU, Electronic Control Unit, also known as "driving computer", "on-board computer", etc.), etc.

[0184] It is understandable that the Electric Power Steering system 5 (EPS) is a power steering system that directly relies on the motor 51 to provide auxiliary torque. Compared with the traditional hydraulic power steering system HPS (Hydraulic Power Steering), the EPS system has many advantages. The EPS is mainly composed of a torque sensor, a vehicle speed sensor, a motor, a speed reduction mechanism, and an electronic control unit (ECU).

[0185] The vehicle 6 provided by the embodiment of the fifth aspect of the present invention is as follows Fig.21 As shown, it includes: a vehicle body 61 and a motor 51 as any one of the embodiments of the third aspect, and the motor 51 is installed in the vehicle body 61.

[0186] The vehicle 6 provided in the embodiment of the fifth aspect of the present invention includes the motor 51 of the embodiment of the third aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0187] A specific example is introduced below by taking the 8P12S permanent magnet motor 51 as an example.

[0188] An 8P12S permanent magnet motor 51 includes a busbar with flexible terminals 1 .

[0189] The busbar is first injected as a whole, and the molding diagram after injection molding is as follows: Fig.16 and Fig.17 shown.

[0190] The injection molded frame 2 has a reserved slot 221 to facilitate the subsequent assembly of the terminal 1. Fig.18 shown.

[0191] The outer ring of the skeleton 2 is evenly distributed with three hooks (also called hooks 23), which are numbered as the first hook, the second hook, and the third hook. Among them, the first hook and the second hook have a slot in the middle, and the total width is B1, and the third hook has no slot in the middle, and the total width is B2. When assembling the busbar, the three hooks need to be hooked into the skeleton slot of the stator 4 (i.e., the slot 41 of the stator 4) in sequence, and the width of the skeleton slot of the stator 4 is B3. The current design size B2<B3<B1. Therefore, the third hook can be easily hooked into the slot without interference, while the first hook and the second hook interfere with the slot, and need to be squeezed and deformed from the side to make the overall width of the first hook and the second hook narrower before they can be hooked into the slot. The advantage of this design is that after the first hook and the second hook are hooked into the slot, due to the effect of elastic force, the side of the first hook and the second hook fits tightly with the side of the slot, and has a certain bonding force, so the assembly of the busbar will be more reliable.

[0192] If the design is not done in this way, the following problems will inevitably occur: If the three hooks are to be hooked into the slots 41 smoothly, the conventional method is to design the width of the hook to be smaller than the width of the slot, that is, there is a gap between the hook and the slot. This design will lead to two problems: 1. If the gap is too large, the busbar is easy to loosen; 2. If the gap is too small, due to the size tolerance and position tolerance of the hook and the slot, it is likely that one of the hooks will not be easy to put in.

[0193] Terminal 1 is designed as a double L-shape. Fig.10 , Fig.14 and Fig.15As shown, it is assembled into the reserved notch of the busbar skeleton 2, as shown in FIG. Fig.18 shown.

[0194] When the terminal 1 is lifted, only the welding point constrains the terminal 1, and the welding point and the point of force are not in a straight line. Therefore, a moment of force (force multiplied by the arm of force) is formed, making it easy for the terminal 1 to deform under tension.

[0195] When the terminal 1 is pressed downward, the supporting mating surface 222 of the frame 2 supports the terminal 1, protecting the terminal 1 from deformation. In addition, the two supporting protrusions 121 of the terminal 1 protect the terminal 1 from instability and deformation when it is subjected to downward pressure. The terminal 1 and the frame 2 of the busbar are clearance-matched in both radial and circumferential directions, so it is easy to deform under force in these two directions.

[0196] Through the above design, the terminal 1 can be easily deformed in the vertical, radial and circumferential directions, but difficult to be deformed in the vertical downward direction.

[0197] This design simulates the stress conditions when the terminal 1 is plugged into the female end. The female end slot has an interference fit with the terminal 1. Therefore, when the terminal 1 is subjected to vertical pressure, it must not be greatly deformed. Due to the influence of tolerance, when the female end slot is plugged into the terminal 1, accurate positioning cannot be guaranteed, and the plugging can only be completed by setting a guide on the female end or the terminal 1. Therefore, the terminal 1 has the ability to deform in the circumferential, radial and vertical directions, that is, the flexibility, which can effectively reduce the difficulty of assembly and improve the assembly yield. This design just meets the above assembly requirements.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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 terminal for a busbar of a motor, characterized in that: The terminal comprises: a first connecting section; A supporting section, one end of which is connected to the first connecting section in a turning direction, and the supporting section is provided with at least one supporting surface; A second connecting section, wherein the second connecting section is connected to the other end of the supporting section by a turning point, and the second connecting section extends in a direction away from the first connecting section, and the first connecting section, the supporting section, and the second connecting section are arranged in sequence along the thickness direction of the first connecting section; Wherein, along the thickness direction of the first connecting segment, the supporting surface is provided on a side of the supporting segment away from the second connecting segment, so that the supporting surface is suitable for being supported to provide supporting force to at least a part of the supporting segment and the second connecting segment; The supporting surface and the first connecting section are parallel to each other; or The supporting surface is arranged obliquely relative to the first connecting section.

2. The terminal according to claim 1, characterized in that: The second connecting section is provided with a supporting protrusion.

3. The terminal according to claim 2, characterized in that: The supporting protrusion is arranged on at least one side of the second connecting section in the width direction.

4. The terminal according to any one of claims 1 to 3, characterized in that: The support segment includes at least one L-shaped segment.

5. The terminal according to any one of claims 1 to 3, characterized in that: The first connecting section and the second connecting section are perpendicular to each other; The first connecting section is provided with a welding surface; The second connecting section is provided with a plug-in portion.

6. The terminal according to any one of claims 1 to 3, characterized in that: With respect to one end of the second connecting section connected to the supporting section, the first connecting section extends obliquely along the circumferential direction of the busbar.

7. A busbar, characterized in that: include: A frame, the frame being an insulating member and provided with a supporting mating surface; A plurality of bus bars, each of the bus bars comprising a main body embedded in the frame and a plurality of connecting parts connected to the main body and protruding from the frame; A plurality of terminals as described in any one of claims 1 to 6 are connected to a plurality of the bus bars, the first connecting section of the terminal is connected to the connecting portion, the second connecting section of the terminal is used to connect to a female power terminal, and the supporting surface of the terminal is in contact with the supporting mating surface.

8. The busbar according to claim 7, characterized in that: 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 the second connecting section of each terminal is embedded in the corresponding strip-shaped bracket.

9. The busbar according to claim 8, characterized in that: The strip-shaped bracket is provided with a slot, and the terminal is plugged into and matched with the slot; The slot is provided with an avoidance gap, and the avoidance gap is used to avoid the supporting section and the first connecting section of the terminal; The strip-shaped bracket is provided with at least one supporting matching surface, and at least a portion of at least one supporting matching surface is located in the slot.

10. The busbar according to claim 9, characterized in that: The terminal is loosely matched with the slot.

11. The busbar according to claim 9, characterized in that: A limiting groove is provided at the entrance of the slot, and the limiting groove is used to accommodate the supporting protrusion of the terminal.

12. The busbar according to claim 11, characterized in that The supporting protrusion is loosely matched with the limiting groove.

13. The busbar according to claim 12, characterized in that: The gap between the terminal and the slot along the thickness direction of the terminal is recorded as a first gap; The gap between the supporting protrusion and the limiting groove along the thickness direction of the terminal is recorded as the second gap; The width of the second gap is smaller than the width of the first gap.

14. The busbar according to any one of claims 8 to 13, characterized in that At least one of the strip-shaped brackets is provided with a positioning identification portion, and the positioning identification portion includes a reinforcing protrusion, and the reinforcing protrusion is connected to the ring-shaped bracket and the strip-shaped bracket.

15. The busbar according to any one of claims 7 to 13, characterized in that The frame is provided with a plurality of hooks, at least one of which is provided with an escape groove, and the escape groove is used to enable the hook to be suitable for elastic deformation.

16. The busbar according to claim 15, characterized in that The hook comprises: a fixing portion connected to the frame; and A hooking portion, the hooking portion is connected to the fixing portion; Wherein, the hooking portion of at least one of the hooks includes a plurality of elastic buckles arranged at intervals, and the avoidance groove is formed between adjacent elastic buckles.

17. The busbar according to claim 16, characterized in that: A plurality of the elastic buckles are arranged side by side; or The plurality of elastic buckles are arranged in a ring shape.

18. The busbar according to claim 16, characterized in that: One end of the hooking portion connected to the fixing portion protrudes from the fixing portion and is connected to the frame.

19. The busbar according to claim 15, characterized in that: The strip-shaped support of the framework protrudes outward from the annular support of the framework along the radial direction, and the hook is connected to the strip-shaped support.

20. The busbar according to claim 19, characterized in that The hook is connected to the radial outer side surface of the strip-shaped bracket.

21. The busbar according to claim 20, characterized in that The top end surface of the hook is arranged obliquely relative to the radial outer side surface of the strip-shaped bracket, and the top end surface extends obliquely from the inside to the outside toward the direction close to the hooking portion of the hook.

22. The busbar according to claim 15, characterized in that: The plurality of hooks are used to hook and cooperate with the slots on the stator, and a portion of the plurality of hooks is provided with the avoidance slots, the hooks provided with the avoidance slots are marked as first hooks, and the other hooks are marked as second hooks; The total width B1 of the first hook>the width B3 of the slot>the total width B2 of the second hook.

23. A motor, 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 7 to 22, wherein the connecting portion of the busbar is connected to the terminal.

24. The electric machine according to claim 23, characterized in that The number of the windings is 12, and the 12 windings are connected in a star connection manner.

25. An electric power steering system, characterized in that: include: A motor as claimed in claim 23 or 24; and A control device is electrically connected to the motor.

26. A vehicle, characterized in that: include: Vehicle body; and The motor according to claim 23 or 24, mounted in the vehicle body.

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