Busbar, motor stator and motor

Abstract

The utility model discloses a busbar, motor stator and motor relates to motor technical field, wherein, busbar, including a plurality of mutually stack conduction's busbar monomer, and adjacent two busbar monomers exist at least partial overlap in its length direction, busbar monomer at least one end integral shaping is provided with the terminal, all the terminal is annular array arrangement, this busbar, motor stator and motor, only in the end of busbar integral shaping sets up the terminal, reduces the processing difficulty of terminal and busbar integral shaping, and adopts the mode of a plurality of busbar stack, increases the terminal quantity on single busbar, satisfies the wiring terminal conduction demand of a plurality of coil winding.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a busbar, a motor stator, and a motor. Background Technology

[0002] A motor stator typically includes a stator support and multiple sets of coil assemblies on its outer periphery. The coil assembly includes a coil support and windings. The phase wire ends of the windings (such as flat wires or round wires) of the multiple sets of coil assemblies need to be connected through terminal blocks to form a phase wire interface.

[0003] Taking a three-phase motor with four coil windings as an example, each coil winding contains three winding units of the three phases U, V and W. Each winding unit includes two terminals, so each coil winding contains 6 terminals, and the entire motor stator contains 24 terminals.

[0004] In the prior art, a busbar is usually set at the shaft end of the motor stator to conduct the connection of the terminals, and the connection position is usually set at the terminal. The terminal and the busbar are mostly designed separately. During assembly, the busbar and the terminal need to be assembled separately, which increases the production process.

[0005] When choosing an integrated design of terminals and busbars, terminals are usually generated by bending at both ends of the busbar, which limits the number of terminals on the busbar. If the number of terminals needs to be increased, the middle part of the busbar needs to be bent or the terminals need to be welded, which increases the processing difficulty and thus leads to an increase in the production cost of the motor.

[0006] In summary, how to solve the problem of increased processing difficulty caused by the increased number of terminals on integrated busbars is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a bus that has terminals integrally formed only at the end, reducing the processing difficulty of integrally forming the terminals and the bus, and adopting a stacking method of multiple bus to increase the number of terminals on a single bus, so as to meet the wiring terminal conduction requirements of multiple coil windings.

[0008] The second objective of this invention is to provide a motor stator that includes the aforementioned busbar, incorporates the same technical features, and is capable of solving the same technical problems.

[0009] The third objective of this invention is to provide a motor that includes the aforementioned busbar, incorporates the same technical features, and is capable of solving the same technical problems.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A bus for connecting the terminals of the inner coil winding of a motor stator;

[0012] The busbar includes a plurality of interconnected busbar units stacked on top of each other, and two adjacent busbar units overlap at least partially in their length direction;

[0013] The busbar unit has a terminal integrally formed at at least one end, and all the terminals are arranged in a ring array.

[0014] Preferably, several of the busbar units are stacked along the axial direction of the motor stator.

[0015] Preferably, the lengths of two adjacent busbar units are not equal, and a portion of the middle section of one busbar unit completely overlaps with a portion of the middle section of another busbar unit along the length direction.

[0016] Preferably, each end of the busbar unit is provided with a terminal, and the length direction of the terminal is perpendicular to the length direction of the busbar.

[0017] Preferably, the terminal includes an axial segment and a radial segment for connection and conduction, wherein the length direction of the axial segment is consistent with the axial direction of the motor stator, and the length direction of the radial segment is consistent with the radial direction of the motor stator;

[0018] The end of the axial segment or the radial segment is connected to the busbar unit for conduction.

[0019] Preferably, one end of the axial segment is connected to the busbar unit, and the other end is connected to one end of the radial segment.

[0020] A return bend is provided at the other end of the radial segment, and the radial segment and the return bend form a U-shaped terminal receiving groove.

[0021] Preferably, the terminal includes a wiring terminal and a phase terminal, wherein the radial segments of the wiring terminal and the phase terminal extend in directions away from the motor stator shaft and towards the motor stator shaft, respectively.

[0022] Preferably, the busbar further includes a phase terminal, which includes a busbar connection part and a phase wire connection part, and the busbar connection part is simultaneously in contact with all individual busbar units for conduction.

[0023] An electric motor stator comprising the busbar described in any one of the preceding claims.

[0024] An electric motor comprising the bus described in any one of the preceding claims.

[0025] The busbar provided by this utility model has at least the following advantages compared with the prior art:

[0026] 1. Terminals are integrally formed at the end of the busbar, reducing the processing difficulty of integrally forming the terminals and the busbar.

[0027] 2. Multiple busbar units are stacked to form a busbar, so that a single busbar can have the terminals of multiple busbar units at the same time. This increases the number of terminals in a single busbar, meeting the requirement that multiple terminals in the coil winding can be connected at the same time. Moreover, the manufacturing process of stacking multiple busbar units is significantly less difficult than the manufacturing process of integrally forming terminals in the middle of the busbar units. This helps to improve the processing speed and yield of the busbar, thereby reducing the overall cost of the motor.

[0028] The motor stator provided by this utility model includes the busbars described above and has the same beneficial effects.

[0029] The motor provided by this utility model includes the above-mentioned busbar and has the same beneficial effects. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a specific motor stator provided by this utility model;

[0032] Figure 2 This is a schematic diagram of the specific coil winding structure provided by this utility model;

[0033] Figure 3 A schematic diagram of the specific winding unit provided by this utility model;

[0034] Figure 4 This is a schematic diagram of the specific winding structure provided by the present utility model;

[0035] Figure 5 This is an assembly diagram of the specific busbar assembly and cable management box provided by this utility model;

[0036] Figure 6 Provided by this utility model Figure 5 Enlarged view of point A in the middle;

[0037] Figure 7 This is a schematic diagram of the specific cable management box provided by this utility model;

[0038] Figure 8 Provided by this utility model Figure 7 Enlarged view of point B in the middle;

[0039] Figure 9 This is a schematic diagram of the specific busbar assembly provided by this utility model;

[0040] Figure 10 A schematic diagram of the specific phase busbar provided by this utility model;

[0041] Figure 11 This is a schematic diagram illustrating the assembly of the specific bridge plate, coil winding, and cable management box provided by this utility model.

[0042] In the picture:

[0043] 1. Cable management box; 11. Cable bridge; 111. Auxiliary support bracket; 112. Circuit board clip; 12. Circuit board assembly; 121. Sensor assembly; 13. Busbar fastener; 14. Terminal support fastener; 15. Terminal fastener; 16. Support bracket; 17. Auxiliary support fastener;

[0044] 2. Busbar assembly; 21. Terminal block; 211. Axial section; 212. Radial section; 213. Bend section; 22. Phase terminal; 23. Phase busbar; 231. Busbar a; 232. Busbar b; 24. Star busbar;

[0045] 3. Stator support assembly;

[0046] 4. Coil winding; 41. Phase wire terminal; 42. Conductor terminal; 43. Coil support; 44. Iron core; 441. Insertion slot; 45. Winding; 451. Winding section a; 452. Winding section b; 453. Winding section c; 46. Inner mounting position; 47. Outer mounting position. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] The core of this utility model is to provide a busbar with terminals integrally formed only at the end, which reduces the processing difficulty of integrally forming the terminals and the busbar, and adopts a stacking method of multiple busbars to increase the number of terminals on a single busbar, so as to meet the wiring terminal conduction requirements of multiple coil windings.

[0049] The second core of this utility model is to provide a motor stator that includes the above-mentioned busbar, which has the same technical features and can solve the same technical problems.

[0050] The third core of this utility model is to provide a motor that includes the above-mentioned busbar, has the same technical features, and can solve the same technical problems.

[0051] Example 1:

[0052] Please refer to Figure 9 and Figure 10 A busbar for connecting the terminals of the inner coil winding 4 of the motor stator;

[0053] A busbar comprises several interconnected busbar units stacked on top of each other, and adjacent busbar units overlap at least partially in their length direction.

[0054] Each busbar unit has a terminal integrally formed at at least one end, and all terminals are arranged in a ring array.

[0055] like Figure 10 As shown, taking a busbar containing two busbar units as an example, the single or double ends of the two busbar units are bent to form terminals 21, and the two busbar units are stacked together with overlapping areas, and the overlapping parts of the two busbar units are conductive, thereby enabling the busbar to obtain one to four terminals 21.

[0056] In some embodiments, the busbar unit is arc-shaped as a whole. When multiple busbar units are stacked, all the terminals 21 are arranged in a ring array, which facilitates the welding and connection of the terminals of the coil windings 4 arranged in different ring arrays in the motor stator with the terminals 21.

[0057] In some embodiments, a plurality of busbar units are stacked along the axial direction of the motor stator.

[0058] The stator shaft end of the motor is usually provided with a fixing component for fixing the busbar, such as a cable management box 1. The cable management box 1 is provided with a cable groove for fixing and accommodating the busbar assembly 2. The busbar assembly 2 usually contains multiple busbars, so multiple cable grooves need to be set accordingly. The cable grooves cannot cross each other to avoid short circuits between different busbars. Therefore, most of the cable grooves in the cable management box 1 are arranged in a concentric circle, and the opening direction of the cable groove is consistent with the axial direction of the motor stator. At the same time, due to the limitation of the radial dimension of the motor, the width of the cable groove is limited. Therefore, it is preferable to stack multiple busbar units along the axial direction of the motor stator to reduce the radial dimension of the busbar and allow the cable management box 1 to accommodate more busbars.

[0059] In some embodiments, the lengths of two adjacent busbar units are not equal, and a portion of the middle section of one busbar unit completely overlaps with a portion of the middle section of another busbar unit along the length direction.

[0060] like Figure 10 As shown, the length of bus a231 is significantly greater than the length of bus b232. Therefore, when both ends of bus a231 and bus b232 are equipped with terminals, in order to avoid interference between the terminals and the bus units, bus a231 and bus b232 need to be arranged in a centered alignment, that is, a portion of bus b232 and part of bus a231 completely overlap along the length direction.

[0061] In some embodiments, three bus units are stacked, and each bus unit has terminals at both ends. The three bus units can be stacked in such a way that their lengths decrease sequentially and they are centered and aligned, so as to obtain six terminals arranged in a ring array.

[0062] Alternatively, one busbar unit can be longer than the sum of the lengths of the other two busbar units, so that the two busbar units overlap and stack with different regions of the first busbar unit along the length direction, thereby obtaining six terminals arranged in a ring array.

[0063] In some embodiments, terminals are provided at both ends of the busbar unit, and the length direction of the terminals is perpendicular to the length direction of the busbar.

[0064] like Figure 10 As shown, the terminal is formed by bending the end of the busbar unit, so that the length direction of the terminal is perpendicular to the length direction of the busbar. This can effectively avoid the terminal from overlapping or interfering with the adjacent busbar unit, and provide a large operating space around the terminal, which facilitates the welding operation between the wiring terminals of the coil winding 4 and the terminal.

[0065] In some embodiments, such as Figure 10 As shown, if the busbar unit is circular or arc-shaped and its center overlaps with the axis of the motor stator, then the length direction of the terminal is the radial direction of the motor stator.

[0066] In some embodiments, the terminal includes an axial segment 211 and a radial segment 212 that are connected and conductive. The length direction of the axial segment 211 is consistent with the axial direction of the motor stator, and the length direction of the radial segment 212 is consistent with the radial direction of the motor stator.

[0067] The end of the axial section 211 or the radial section 212 is connected to the busbar unit for conduction.

[0068] like Figure 9 and Figure 10As shown, the terminal is provided with a radial section 212, so that the length direction of the terminal is perpendicular to the length direction of the busbar unit, thereby keeping the welding position of the terminal and the wiring terminal away from the busbar unit, which facilitates the welding operation of the wiring terminal. The terminal is also provided with an axial section 211, so that the radial section 212 can avoid other busbar bodies arranged at the same height when it extends, thus preventing the terminal from contacting and conducting with other busbars.

[0069] Meanwhile, based on the differences in the arrangement height of different busbars and their own rotation radius, different lengths of axial section 211 and / or radial section 212 can be selected to avoid non-preset contact and conduction between the terminals and the busbars, and the welding positions of the terminals can be arranged in a ring array about the axis of the motor stator.

[0070] In some embodiments, one end of the axial segment 211 is connected to the busbar unit and the other end is connected to one end of the radial segment 212.

[0071] A return bend 213 is provided at the other end of the radial section 212, and the radial section 212 and the return bend 213 form a U-shaped terminal receiving groove.

[0072] like Figure 9 Different busbars are arranged concentrically and at the same height. Therefore, the terminals corresponding to different busbars are provided with axial sections 211 of equal length and radial sections 212 of unequal length. The end of the axial section 211 is connected to the busbar unit, so that all terminals have equal rotation height. The distance between the welding position of different terminals and the axis of the motor stator is equal. That is, the welding positions of different terminals are arranged in a ring array around the axis of the motor stator.

[0073] Meanwhile, a return bend 213 is provided at the free end of the radial section 212, and a receiving groove with a single-end opening is formed between the radial section 212 and the return bend 213, which facilitates the clamping and fixing of the wiring terminal and is beneficial to the welding operation of the wiring terminal and the terminal block.

[0074] In some embodiments, different busbars are arranged concentrically and in a stepped manner. It is preferable that the end of the radial segment 212 is in contact with the busbar unit and conducts through it. After the radial segment 212 passes over the other busbars, it is bent to form the axial segment 211. Through the length design of the axial segment 211, the welding positions of different terminals can also be arranged in a ring array around the axis of the motor stator.

[0075] In some embodiments, the terminals include wiring terminals 21 and phase terminals 22, with radial segments 212 of wiring terminals 21 and phase terminals 22 extending in directions away from the motor stator shaft and closer to the motor stator shaft, respectively.

[0076] In addition to the terminal 21 used to connect with the wiring terminal of the coil winding 4, the bus also includes a phase terminal 22 used to connect with the power phase line. In order to make it easy to distinguish between the terminal 21 and the phase terminal 22, they are extended in different directions along the radial direction of the motor stator. For example, the terminal 21 extends outward along the radial direction of the motor stator, and the phase terminal 22 extends inward along the radial direction of the motor stator. This makes the welding position of the two terminals obviously different, thus avoiding misidentification.

[0077] In some embodiments, the busbar further includes a phase terminal 22, which includes a busbar connection portion and a phase connection portion, wherein the busbar connection portion simultaneously contacts and conducts with all individual busbar units.

[0078] like Figure 9 As shown, the phase terminal 22 and the busbar adopt a separate design. All busbar units of the busbar are connected through the busbar connection part, thereby ensuring that all busbar units can have good conductivity with the power phase line.

[0079] In addition to the bus disclosed in the above embodiments, the present invention also provides a motor stator, including a plurality of coil windings 4 and any of the above-mentioned bus.

[0080] The terminals inside coil winding 4 are connected to the terminals inside the busbar one by one;

[0081] The structure of the other parts of the motor stator is described in reference to existing technologies and will not be repeated here.

[0082] In addition to the busbars and motor stators disclosed in the above embodiments, this utility model also provides a motor including the above-mentioned busbars. For the structure of other parts of the motor, please refer to the prior art, which will not be repeated here.

[0083] Example 2:

[0084] Please refer to Figure 3 and Figure 4 A winding unit for forming the coil winding 4 inside the stator of a motor;

[0085] The winding unit includes:

[0086] Several coil supports 43 arranged side by side and relatively fixed;

[0087] The winding 45 has several coil supports 43 wrapped around its bridge, and the winding 45 in two adjacent coil supports 43 has opposite winding directions.

[0088] like Figure 3 and Figure 4As shown, taking three coil supports 43 as an example, the winding 45 is bridged and wound on the three coil supports 43, and each coil support 43 has a winding a segment 451, a winding b segment 452 and a winding c segment 453 corresponding to the winding 45 respectively.

[0089] Among them, such as Figure 4 As shown, taking the phase wire terminal 41 of the winding 45 as the starting point and the conductor terminal 42 of the winding 45 as the ending point, the winding a section 451 is wound clockwise, the winding b section 452 is wound counterclockwise, and the winding c section 453 is wound clockwise. The side of the winding a section 451 that is close to the winding b section 452 has a downward winding direction, and the side of the winding b section 452 that is close to the winding a section 451 has a downward winding direction. Therefore, the winding directions of the two adjacent winding sections 45 are the same, so the winding 45 of the later winding will not affect the winding 45 of the earlier winding, thereby avoiding the arching of the winding 45 of the earlier winding.

[0090] At the same time, the winding direction of the winding section b 452 near the winding section c 453 and the winding direction of the winding section c 453 near the winding section b 452 are both upward. Similarly, the winding section 45 of the later winding will not affect the winding section 45 of the earlier winding, thus avoiding the arching of the winding section 45 of the earlier winding.

[0091] When the winding 45 inside the winding unit is wound across the bridge, it is not limited by the number of coil supports 43, thereby increasing the capacity of the winding 45 inside a single winding unit, which in turn increases the inductance of the coil winding 4 inside the motor stator, and helps to increase the effective speed range of the motor.

[0092] In some embodiments, the beginning and end of the winding 45 extend toward the same end along the rotation axis of the winding unit.

[0093] like Figure 2 and Figure 4 As shown, within a motor stator, all the terminals of the windings 45 extend axially to one end along the motor axis. Only one axial end of the motor stator needs to be arranged for the wiring mechanism and the terminals to accommodate the winding units. That is, it only occupies the axial space at one end of the motor stator. Compared with the traditional method where the two terminals of the windings 45 extend to different axial ends, this embodiment can effectively reduce the total length of the motor stator and help to reduce the axial dimension of the motor.

[0094] In some embodiments, the distance between the beginning and end of the winding 45 and the rotation axis of the motor stator is different.

[0095] like Figure 3As shown, the phase wire terminal 41 of the winding 45 is the starting end, and the conductor terminal 42 of the winding 45 is the ending end. The distance between the phase wire terminal 41 and the rotation axis of the motor stator is less than the distance between the conductor terminal 42 and the rotation axis of the motor stator. This makes it easier to distinguish the phase wire terminal 41 and the conductor terminal 42 of the winding 45 according to the position of the terminals. At the same time, it is also easier to fix the terminal 21 at the corresponding position in the wire management device at the end of the motor stator shaft, thereby ensuring the accuracy of the wiring and avoiding miswiring of the phase wire terminal 41 and the conductor terminal 42.

[0096] In some embodiments, the beginning of the winding 45 is arranged on the side wall of the coil support 43 near the motor stator shaft.

[0097] The end of the winding 45 is located on the side wall of the coil support 43, not near the motor stator shaft.

[0098] In some embodiments, the end of the winding 45 is positioned on the side wall of the coil support 43 near the motor stator shaft.

[0099] The beginning of the winding 45 is located on the side wall of the coil support 43, not near the motor stator shaft, which also enables easy differentiation between the beginning and end of the winding 45.

[0100] In some embodiments, there are three coil supports 43, with the beginning and end of the winding 45 located on both sides of the middle coil support 43.

[0101] like Figure 3 and Figure 4 As shown, there are three coil supports 43. The phase wire terminal 41 and the conductor terminal 42 are located on both sides of the middle coil support 43. Therefore, when multiple winding units are arranged side by side, there are at least two coil supports 43 between the terminals of two adjacent winding units, and only one coil support 43 between the two terminals of the same winding unit. Thus, the boundary between two adjacent winding units can be clearly distinguished, avoiding misidentification of the phase wire terminal 41 and conductor terminal 42 of the winding unit.

[0102] At the same time, such as Figure 1 and Figure 2 As shown, the two terminals of the winding unit are respectively set on both sides of the intermediate coil bracket 43, so that the phase wire terminal 41 and the conductor terminal 42 of the same winding 45 are reserved with the width of one coil bracket 43, so that the two terminals can be connected to different terminals of the wire management device respectively, thus avoiding short circuit.

[0103] In some embodiments, both ends of the coil support 43 are provided with baffles to limit the displacement of the winding 45 along the axial direction of the coil support 43.

[0104] like Figure 3 As shown, baffles are provided at both ends of the coil support 43 to prevent the winding 45 from detaching from the shaft end of the coil support 43. When the winding 45 is wound, the winding 45 is squeezed by the baffles at the shaft end of the coil support 43, thus tightly winding around the outer periphery of the coil support 43. This helps to improve the fit between the winding 45 and the outer periphery of the coil support 43, and increases the capacity of the winding 45 inside the coil support 43.

[0105] In some embodiments, the height of the baffle is not less than the stacked thickness of the two layers of winding 45.

[0106] In actual implementation, it is preferable that the height of the baffle is not less than the height of the stack of two layers of winding 45, so that the winding 45 can be wound in at least two layers in the coil support 43, thereby increasing the amount of winding 45 that can be accommodated in a single coil support 43, and thus improving the inductance of the coil winding 4.

[0107] In some embodiments, the coil support 43 includes an iron core 44, which is fixedly connected to the stator support assembly 3 of the motor stator.

[0108] like Figure 3 As shown, adding an iron core 44 inside the coil bracket 43 also helps to increase the inductance of the coil winding 4 and increase the effective speed range of the motor. In addition, the iron core 44 is provided with a connector for fixing to the stator bracket assembly 3, which facilitates the fixed installation of the coil winding 4 and the stator bracket assembly 3 of the motor.

[0109] In some embodiments, the coil support 43 is provided with a connector for fixing to the stator support assembly 3, which facilitates the fixed installation of the coil winding 4 and the stator support assembly 3 of the motor.

[0110] Example 3:

[0111] Please refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 An end plate assembly for fixing and accommodating a busbar assembly 2 at the end of a motor stator shaft;

[0112] End-of-life components, including:

[0113] Cable management box 1 includes several fixing components for fixing bus assembly 2;

[0114] Several column feet 16 are arranged in a circular array and are fixedly connected to the cable management box 1 for insertion and fixing to the stator support assembly 3 and / or coil winding 4 of the motor stator along the axial direction of the motor stator.

[0115] like Figure 7As shown, the end plate assembly includes a relatively fixed cable management box 1 and several post feet 16. The cable management box 1 is provided with a fixing component for fixing the busbar assembly 2, so that the busbar assembly 2 and the terminal of the coil winding 4 have a relatively stable relative position, which facilitates the mechanized welding of the terminal and the busbar assembly 2. Moreover, the connection of the terminal of the coil winding 4 is realized through the busbar, avoiding the winding and accumulation of different terminals at the shaft end of the motor stator, which helps to improve the welding and conduction efficiency of the terminal, and reduces the space occupation at the shaft end of the motor stator, thus reducing the size of the shaft end of the motor stator.

[0116] Meanwhile, the column feet 16 arranged in a ring array are used to fix the cable management box 1 to the motor stator by plugging the column feet 16 into the stator support assembly 3 and / or the coil winding 4. This helps to simplify the fixing process of the cable management box 1 and the motor stator and improve the fixing efficiency.

[0117] In some embodiments, the insertion direction of the column base 16 is opposite to the end face of the fixing component of the cable management box 1.

[0118] The insertion direction of the column base 16 to the stator support assembly 3 and / or the coil winding 4 is consistent with the axial direction of the motor stator, and the fixing assembly is set on the end face of the cable management box 1 on the side opposite to the insertion direction of the column base 16.

[0119] Since the column bases 16 are arranged in a ring array, the relative rotation between the cable management box 1 and the motor stator is restricted after the column bases 16 are plugged in.

[0120] Furthermore, with the insertion of the column foot 16, the cable management box 1 abuts against the end of the motor stator, thereby achieving unidirectional limiting of the cable management box 1 relative to the motor stator along its own axial direction;

[0121] Since the fixing component is set on the end face of the cable management box 1 opposite to the side where the column foot 16 is inserted, when the busbar assembly 2 is welded to the terminal, the terminal and the busbar assembly 2 together limit the cable management box 1 in the other direction along its own axis, thus realizing the full constraint of the free end of the cable management box 1 and ensuring that the cable management box 1 and the motor stator have a fixed relative positional relationship.

[0122] In some embodiments, the insertion direction of the column base 16 is consistent with the axial direction of the cable management box 1, and the sidewall of the column base 16 is provided with a guide groove and / or a guide protrusion along the insertion direction.

[0123] like Figure 5 and Figure 6 As shown, the side wall of the column base 16 is provided with guide grooves and / or guide protrusions to ensure that the column base 16 has the correct insertion trajectory when it is inserted with the stator support assembly 3 and / or the coil winding 4, and to avoid the column base 16 getting stuck during the insertion process.

[0124] In some embodiments, the end plate assembly further includes a bridge 11 fixed relative to the cable management box 1, the bridge 11 being used to accommodate the circuit board of the motor stator;

[0125] The bridge plate 11 is provided with an auxiliary column foot 111, which is used to be inserted and fixed to the stator support assembly 3 and / or coil winding 4 of the motor stator along the axial direction of the motor stator.

[0126] The end plate assembly also includes a bridge 11 fixed relative to the cable management box 1, which facilitates the installation of the circuit board assembly 12 for motor stator control or detection. In addition, the bridge 11 is provided with auxiliary pins 111 to facilitate the insertion and fixing of the bridge 11 and the motor stator.

[0127] Among them, auxiliary pin 111 and pin 16 have the same insertion direction, that is, when the end plate assembly is assembled with the motor stator, auxiliary pin 111 and pin 16 can be inserted at the same time in the same process, ensuring the simplification of the assembly process.

[0128] In some embodiments, the distances between the auxiliary column 111 and the column 16 and the axis of the motor stator are not equal, such as... Figure 5 and Figure 7 As shown, the distance between the column base 16 and the motor stator axis is significantly smaller than the distance between the auxiliary column base 111 and the motor electronic axis. Therefore, after the column base 16 and the auxiliary column base 111 are inserted into the motor stator, the end plate assembly is doubly fixed by insertion, which further ensures the stability of the relative positional relationship between the end plate assembly and the motor stator.

[0129] In some embodiments, the bridge 11 is provided with a plurality of circuit board clips 112 and / or cutout holes;

[0130] Circuit board clip 112 is used to secure the circuit board;

[0131] Holes are used to penetrate electrical components inside the circuit board that abut against the motor stator.

[0132] like Figure 7 As shown, the board bridge 11 is provided with a circuit board receiving groove, and a circuit board buckle 112 is provided at the corresponding position of the circuit board receiving groove. When the circuit board assembly 12 is assembled with the board bridge 11, the circuit board assembly 12 can be accommodated in the circuit board receiving groove and fixed by the circuit board buckle 112.

[0133] Meanwhile, the corresponding position of the circuit board receiving slot is also provided with a hollow hole, which makes it easy for the sensor component 121 on the circuit board assembly 12 to pass through and then combine with the component to be tested on the motor stator.

[0134] In some embodiments, the cable management box 1 is further provided with at least one of a plurality of cable channels, terminal support fasteners 14 and terminal fasteners 15;

[0135] The cable tray is used to accommodate the busbar of the busbar assembly 2, and several busbar fixing parts 13 are provided in the cable tray to fix the busbar in the cable tray;

[0136] The fixing height of the terminal support fastener 14 is higher than the fixing height of the fixing assembly, and is used to support the terminals of the bus assembly 2.

[0137] The terminal fixing members 15 are arranged in a ring array on the periphery of the cable management box 1, and their positions correspond one-to-one with those of the terminal support fixing members 14, for fixing the terminals of the motor electronic inner coil winding 4.

[0138] The fixing component of the cable management box 1 includes a cable groove on its end face for accommodating the busbar in the busbar assembly 2. The opening of the cable groove is aligned with the axial direction of the motor stator to facilitate the assembly of the busbar. Several busbar fixing parts 13 are provided in the cable groove to facilitate the snapping of the assembled busbar into the cable groove and prevent the busbar from detaching from the cable groove.

[0139] Furthermore, several terminal support fasteners 14 are provided at corresponding positions in the wire trough. The terminal support fasteners 14 have U-shaped notches, and the height of the notches is higher than the height of the wire trough, thus facilitating the support and fixation of the portion of the terminal that is higher than the busbar. Figure 8 and Figure 10 As shown, the terminal includes an axial section 211 and a radial section 212. Since the radial section 212 is connected to the busbar unit through the axial section 211, the height of the radial section 212 is higher than that of the busbar unit. When the busbar unit is assembled into the wire groove, the terminal support and fixing member 14 can fix the radial section 212 to ensure that the welding position of the terminal and the wiring terminal is fixed.

[0140] Meanwhile, a terminal fixing piece 15 is provided on the periphery of the cable management box 1 to fix the terminal, thereby making the terminal and the terminal have a relatively stable position, which facilitates the mechanized automatic welding of the terminal and the terminal.

[0141] Meanwhile, by setting the terminal fixing parts 15 one by one around the terminal support fixing parts 14, it helps to further shorten the reserved welding length of the terminal and reduce the winding and accumulation of the terminal at the motor stator shaft end.

[0142] In addition to the end plate assembly disclosed in the above embodiments, the present invention also provides a motor stator, including coil winding 4 and the end plate assembly of any one of the above.

[0143] The coil winding 4 includes several coil supports 43 arranged in a ring array. The gap between the side walls of two adjacent coil supports 43 forms a column mounting position for the column 16 to be inserted and fixed.

[0144] like Figure 3As shown, a baffle is provided at the shaft end of the coil support 43. When the column foot 16 is inserted, the baffle and the guide groove of the column foot 16 cooperate with each other to restrict the radial relative movement between the column foot 16 and the coil winding 4.

[0145] Meanwhile, both ends of the coil bracket 43 can be provided with column mounting positions. For example, the end closer to the motor stator axis is the inner mounting position 46, which is used for the insertion of the column 16, while the end away from the motor stator axis is the outer mounting position 47, which is used to assist the insertion of the column 111. Moreover, the guide protrusion of the auxiliary column 111 can abut against the baffle at the outer mounting position 47, further restricting the relative position of the end plate assembly and the coil winding 4.

[0146] In some embodiments, the coil winding 4 includes a plurality of windings 45, and the terminals at both ends of the windings 45 extend toward the same end along the rotation axis of the coil winding 4.

[0147] Busbar assembly 2 is fixedly installed inside the end plate assembly. Busbar assembly 2 includes several busbars for connecting and conducting to terminals different from those of coil winding 4.

[0148] like Figure 2 As shown, taking a three-phase motor as an example, several coil windings 4 are arranged in a ring array inside the motor stator, and each coil winding 4 includes three-phase winding units of U, V and W, and each winding unit includes phase wire terminals 41 and conductor terminals 42. When both phase wire terminals 41 and conductor terminals 42 extend to one end of the motor stator axial direction, it is only necessary to arrange end plate assemblies and busbar assemblies 2 at one end of the motor stator for welding the terminals. Compared with phase wire terminals 41 and conductor terminals 42 extending to both ends of the motor stator axial direction, their axial space occupation is significantly reduced, which helps to reduce the axial dimension of the motor stator.

[0149] Meanwhile, the coil winding 4 of the three-phase motor can be connected in star or delta configurations;

[0150] Among them, such as Figure 1 As shown, when using a star connection, the bus assembly 2 includes three phase busbars 23 and a star busbar 24. When wiring, the different phase wire terminals 41 of each coil winding 4 are welded to the corresponding phase busbar 23 for conduction, while all wire terminals 42 in the same coil winding 4 are welded to the same star busbar 24.

[0151] Moreover, such as Figure 8 As shown, auxiliary support fasteners 17 are provided on the outer periphery of the cable management box 1 to fix the star point busbar 24;

[0152] When a delta connection is used, there is no need for the star bus 24. The three phase wire terminals 41 in the same coil winding 4 are connected to the corresponding phase bus 23, and the three wire terminals 42 are connected to the remaining phase bus 23, so that the windings 45 of the three winding units in the same coil winding 4 are connected end to end.

[0153] In some embodiments, the motor stator further includes two bridge plates 11 for fixed connection to both ends of the coil winding 4;

[0154] The bridge 11 includes an auxiliary column base 111 for plugging and fixing to the column base mounting position;

[0155] A circuit board assembly 12 is fixedly installed inside the bridge 11, and a sensor assembly 121 that can be plugged into the iron core 44 of the coil winding 4 is installed inside the circuit board assembly 12.

[0156] like Figure 11 As shown, the two bridge plates 11 are connected to the motor electronics at corresponding positions on the shaft end of the motor stator, and the iron core 44 of the coil winding 4 at the corresponding position is provided with a plug-in slot 441 for the sensor assembly 121 on the circuit board assembly 12 to be plugged in for sensing the relative angle between the coil and the magnet.

[0157] The structure of the other parts of the motor stator is described in reference to existing technologies and will not be repeated here.

[0158] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0159] The busbar, motor stator, and motor provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A busbar for connecting the terminals of the inner coil winding (4) of a motor stator, characterized in that, It includes several interconnected busbar units stacked on top of each other, and two adjacent busbar units overlap at least partially in their length direction; The busbar unit has a terminal integrally formed at at least one end, and all the terminals are arranged in a ring array.

2. The busbar according to claim 1, characterized in that, Several of the busbar units are stacked along the axial direction of the motor stator.

3. The busbar according to claim 2, characterized in that, The lengths of two adjacent busbar units are not equal, and a portion of the middle section of one busbar unit completely overlaps with a portion of the middle section of the other busbar unit along the length direction.

4. The busbar according to claim 3, characterized in that, Both ends of the busbar unit are provided with terminals, and the length direction of the terminals is perpendicular to the length direction of the busbar.

5. The busbar according to claim 1, characterized in that, The terminal includes an axial section (211) and a radial section (212) that are connected and conductive. The length direction of the axial section (211) is consistent with the axial direction of the motor stator, and the length direction of the radial section (212) is consistent with the radial direction of the motor stator. The end of the axial segment (211) or the radial segment (212) is connected to the busbar unit.

6. The busbar according to claim 5, characterized in that, One end of the axial section (211) is connected to the busbar unit, and the other end is connected to one end of the radial section (212). The other end of the radial section (212) is provided with a bend section (213), and the radial section (212) and the bend section (213) form a U-shaped terminal receiving groove.

7. The busbar according to claim 6, characterized in that, The terminals include a wiring terminal (21) and a phase terminal (22), the radial segments (212) of the wiring terminal (21) and the phase terminal (22) extending in directions away from the motor stator shaft and closer to the motor stator shaft, respectively.

8. The busbar according to any one of claims 1-7, characterized in that, It also includes a phase terminal (22), which includes a busbar connection part and a phase wire connection part, wherein the busbar connection part is simultaneously connected to all busbar units.

9. A motor stator, characterized in that, Includes the bus described in any one of claims 1-8.

10. An electric motor, characterized in that, Includes the bus described in any one of claims 1-8.

Images