A motor stator and motor

Abstract

This invention discloses a motor stator and a motor, relating to the field of motor technology. The motor stator includes: a coil winding comprising several winding units, both terminals of which extend along the rotation axis of the coil winding towards the same end; and a stator end wiring structure, fixedly disposed at one end of the rotation axis of the coil winding, for correspondingly engaging and communicating with the terminals of all the winding units. In this motor stator and motor, the two terminals of the winding units extend towards the same axial end of the stator, and a stator end wiring structure is provided at the stator axial end for welding the terminals. The terminals are accommodated only at one end of the stator, avoiding an increase in the axial length of the stator caused by accommodating terminals at both ends.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and more specifically, to an electric motor stator and an electric motor. Background Technology

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

[0003] In the process of implementing this application, the applicant discovered the following problems with the prior art:

[0004] After the copper wire is wound on the stator winding, the terminals at both ends of the copper wire still need to be manually wound onto the ends of the stator winding. Moreover, since the two ends of the copper wire are located at the two ends of the motor stator, the terminals need to be wound and fixed at the two ends of the motor stator respectively.

[0005] The existing copper wire winding at the stator winding end is disordered and requires a long terminal to be reserved so that different terminals can be wound together and conduction. This increases the amount of phase wire to be accommodated at the stator end and occupies the end space at both ends of the motor stator, which seriously increases the axial length of the stator and results in a larger axial dimension of the motor.

[0006] In summary, how to solve the problem that the connection terminals of the coil winding need to be wound at both ends of the motor stator, occupying the end space at both ends of the motor stator, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a motor stator in which the two terminals of the winding unit extend toward the same axial end of the stator, and a stator end wiring structure is provided at the stator shaft end for welding the terminals, so that the terminals are only accommodated at one end of the stator, thereby avoiding the increase in the axial length of the stator caused by accommodating terminals at both ends of the stator.

[0008] Another object of the present invention is to provide a motor including the above-described motor stator, having the same technical features and being able to solve the same technical problems.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] An electric motor stator, comprising:

[0011] A coil winding includes several winding units, wherein both terminals of the winding units extend toward the same end along the rotation axis of the coil winding;

[0012] The stator-end wiring structure is fixedly disposed at one end of the rotation axis of the coil winding, and is used to connect and conduct with the terminals of all the winding units one by one.

[0013] Preferably, the stator terminal wiring structure includes:

[0014] An end plate assembly includes a plurality of grooves and a plurality of notches. The grooves are arranged concentrically and in a stepped manner. The notches are arranged in a ring array and are connected to at least one group of grooves. One end of each notch is an open end, and the open end of the notch extends to the outer or inner peripheral wall of the end plate assembly.

[0015] A bus assembly includes a plurality of busbars and a plurality of terminals. The busbars are fixedly installed in a one-to-one correspondence with the wire grooves, and the terminals are fixedly installed in a one-to-one correspondence with the notches. The terminals are only connected to the corresponding busbars, and the terminals extend to the outside of the notches.

[0016] The end plate assembly is coaxially and fixedly connected to the end of the coil winding.

[0017] Preferably, the notch includes a wiring notch and a phase wire notch;

[0018] The terminal includes a wiring terminal and a phase terminal. The wiring terminal is used to connect with the wiring terminal of the winding unit, and the phase terminal is used to connect with the phase line of the power supply.

[0019] The wiring terminals and the wiring notches are arranged in a one-to-one correspondence;

[0020] The phase wire terminals and the phase wire notches are in one-to-one correspondence.

[0021] Preferably, the length direction of the notch is consistent with the radial direction of the end plate assembly, and each notch is provided with an open end extending to the peripheral wall of the end plate assembly;

[0022] The opening directions of the wiring notch and the phase wire notch are opposite.

[0023] Preferably, one end of the notch facing away from the opening end is connected to the wire groove, so as to enable the terminal in the notch to abut and connect with the busbar in the corresponding wire groove.

[0024] Preferably, the terminal is integrally formed with the corresponding busbar, or the terminal is in contact with the corresponding busbar to conduct electricity;

[0025] The terminal includes a receiving groove extending outside the notch for clamping the wiring terminal of the winding unit.

[0026] Preferably, the end tray assembly includes a cable management box and an end cap;

[0027] The cable tray is disposed in the cable management box, and the end cap is used to cover the open end of the cable tray;

[0028] The cable management box and the end cap are respectively provided with buckles and fastening openings for fastening.

[0029] Preferably, the bus includes a phase bus and a conductor bus;

[0030] The two ends of the winding unit are the phase wire terminal and the conductor terminal, respectively;

[0031] The phase line terminal is connected to the phase line busbar of the corresponding phase, and the conductor terminal is connected to the conductor busbar.

[0032] Preferably, the busbar includes three phase busbars, the coil winding includes three winding units, and the two ends of the three winding units are connected end to end in sequence, and the connection point is connected to the corresponding phase busbar.

[0033] An electric motor comprising the motor stator described in any one of the preceding claims.

[0034] The motor stator provided by this invention has at least the following advantages compared with the prior art:

[0035] 1. Both terminals of the winding unit extend along the axial direction of the motor towards the same end of the stator. That is, the terminals of the winding unit are only accommodated at one end of the stator, avoiding the increase in the motor shaft size caused by accommodating terminals at both ends of the motor stator.

[0036] 2. By setting a stator end wiring structure at the shaft end of the stator, the terminals of all winding units are connected and conductive. Furthermore, the fixed welding position provided by the stator end wiring structure helps to improve the automation of terminal welding, thereby improving production efficiency.

[0037] The motor provided by the present invention includes the motor stator described above and has the same beneficial effects. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of a first embodiment of the motor stator provided by the present invention;

[0040] Figure 2 This is a schematic diagram of a second embodiment of the motor stator provided by the present invention;

[0041] Figure 3 Provided by the present invention Figure 1 A sectional view;

[0042] Figure 4 Provided by the present invention Figure 3 Enlarged view of point A in the middle;

[0043] Figure 5 This is a schematic diagram of the cable management box provided by the present invention;

[0044] Figure 6 Provided by the present invention Figure 5 A diagram from another perspective;

[0045] Figure 7 This is a schematic diagram of a first embodiment of the stator end wiring structure provided by the present invention.

[0046] Figure 8 This is a schematic diagram of the structure of the first embodiment of the end cap provided by the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of the third embodiment of the motor stator provided by the present invention;

[0048] Figure 10 Provided by the present invention Figure 9 A sectional view;

[0049] Figure 11 Provided by the present invention Figure 10 Enlarged view of point B in the middle;

[0050] Figure 12 This is a schematic diagram of a second embodiment of the stator end wiring structure provided by the present invention;

[0051] Figure 13 This is a schematic diagram of the structure of the second embodiment of the end cap provided by the present invention;

[0052] Figure 14 This is a schematic diagram of the coil winding structure provided by the present invention;

[0053] Figure 15 This is a schematic diagram of the structure of the conductive component provided by the present invention;

[0054] Figure 16 This is a schematic diagram of the star connection of the coil winding provided by the present invention;

[0055] Figure 17 This is a schematic diagram of the delta connection of the coil winding provided by the present invention.

[0056] In the picture:

[0057] 1. End plate assembly; 11. End cap; 111. End cap snap-fit ​​opening; 112. Baffle; 113. Splicing structure; 114. End cap snap-fit; 12. Cable management box; 121. Support body; 122. Box body snap-fit; 123. Rib; 124. Wiring notch; 124U, U-phase wiring notch; 124V, V-phase wiring notch; 124W, W-phase wiring notch; 125. Phase wire notch; 125U, U-phase phase wire notch; 125V, V-phase phase wire notch; 125W, W-phase phase wire notch; 126. Wire notch; 127. Box body snap-fit ​​opening;

[0058] 2. Busbar assemblies; 2U and U-phase busbars; 2V and V-phase busbars; 2W and W-phase busbars; 21. Terminal blocks; 21U and U-phase terminal blocks; 21V and V-phase terminal blocks; 21W and W-phase terminal blocks; 22. Phase wire terminals; 22U and U-phase phase wire terminals; 22V and V-phase phase wire terminals; 22W and W-phase phase wire terminals;

[0059] 3. Stator support assembly;

[0060] 4. Coil winding; 41. Phase wire terminal; 42. Conductor terminal;

[0061] 5. Conductor assembly; 51. Wire terminal block; 511. Bending section; 512. Return bend section. Detailed Implementation

[0062] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] The core of this invention is to provide a motor stator in which the two terminals of the winding unit extend toward the same axial end of the stator, and a stator end wiring structure is provided at the stator shaft end for welding the terminals. The terminals are only accommodated at one end of the stator, thus avoiding the increase in the axial length of the stator caused by accommodating terminals at both ends of the stator.

[0064] Another core aspect of this invention is to provide a motor including the aforementioned motor stator, which has the same technical features and can solve the same technical problems.

[0065] Example 1:

[0066] Please refer to Figure 9 , Figure 10 , Figure 11 and Figure 12An electric motor stator, comprising:

[0067] The coil winding 4 includes several winding units, and the two terminals of the winding units extend to the same end along the rotation axis of the coil winding 4.

[0068] The stator end wiring structure is fixedly set at one end of the rotation axis of the coil winding 4, and is used to connect and conduct with the terminals of all the winding units one by one.

[0069] like Figure 14 As shown, the stator support assembly 3 of the motor stator has several sets of coil windings 4 arranged around its circumference, and each coil winding 4 includes several independent winding units, and each winding unit includes two terminals, namely a phase wire terminal 41 and a conductor terminal 42. Both the phase wire terminal 41 and the conductor terminal 42 extend toward the same shaft end of the motor stator. According to the wiring design inside the motor, different phase wire terminals 41 and conductor terminals 42 are welded to different wiring positions in the stator end wiring structure, thereby realizing the path of each winding unit.

[0070] Meanwhile, the stator shaft end only needs to accommodate the wiring terminal on one end, which can effectively reduce the axial length of the stator and help shorten the axial dimension of the motor.

[0071] In some embodiments, the stator terminal wiring structure includes:

[0072] The end plate assembly 1 includes several wire grooves and several notches. The wire grooves are arranged concentrically and in a stepped manner. The notches are arranged in a ring array and are connected to at least one set of wire grooves. One end of the notch is an open end, and the open end of the notch extends to the outer or inner peripheral wall of the end plate assembly 1.

[0073] Bus assembly 2 includes several busbars and several terminals. The busbars are fixedly installed in a one-to-one correspondence with the wire troughs, and the terminals are fixedly installed in a one-to-one correspondence with the notches. The terminals are only connected to the corresponding busbars, and the terminals extend to the outside of the notches.

[0074] Among them, the end plate assembly 1 is coaxially and fixedly connected to the end of the coil winding 4.

[0075] like Figure 16 As shown, when the three-phase motor adopts a star connection, the end plate assembly 1 is provided with four wire slots, which are respectively used for the assembly of the U-phase bus 2U, the V-phase bus 2V, the W-phase bus 2W and the conductor assembly 5. Each wire slot is provided with several notches, which are used for the assembly of terminals. The terminals extend to the outside of the peripheral wall of the end plate assembly 1 to facilitate contact and conduction with the wiring terminals of the winding unit.

[0076] The phase wire terminals 41 of the three winding units of the coil winding 4 are respectively connected to the corresponding U-phase busbar 2U, V-phase busbar 2V and W-phase busbar 2W, while the wire terminals 42 of the three winding units are all connected to the conductor assembly 5.

[0077] like Figure 17 As shown, when the three-phase motor adopts a delta connection, three wire slots are provided in the end plate assembly 1, which are respectively used for the assembly of the U-phase bus 2U, the V-phase bus 2V and the W-phase bus 2W;

[0078] The three winding units in coil winding 4 are connected end to end in sequence. That is, in all coil windings 4, the beginning of the U-phase winding unit and the end of the W-phase winding unit are connected to the U-phase busbar 2U, the beginning of the V-phase winding unit and the end of the U-phase winding unit are connected to the V-phase busbar 2V, and the beginning of the W-phase winding unit and the end of the V-phase winding unit are connected to the W-phase busbar 2W.

[0079] In some embodiments, the notch includes a wiring notch 124 and a phase wire notch 125;

[0080] The terminals include wiring terminals 21 and phase terminals 22. Wiring terminals 21 are used to connect with the wiring terminals of the winding unit, and phase terminals 22 are used to connect with the phase line of the power supply.

[0081] Terminal 21 and wiring notch 124 are arranged in a one-to-one correspondence;

[0082] Phase wire terminal 22 and phase wire notch 125 are in one-to-one correspondence.

[0083] The gap also includes a phase wire gap 125 for setting phase wire terminals 22. Each busbar is provided with one phase wire gap 125 to facilitate the connection of phase wires.

[0084] In some embodiments, the length direction of the notch is consistent with the radial direction of the end plate assembly 1, and the notch is provided with an opening end extending to the peripheral wall of the end plate assembly 1.

[0085] The opening directions of the wiring notch 124 and the phase wire notch 125 are opposite.

[0086] The length direction of both the wiring notch 124 and the phase wire notch 125 is consistent with the radial direction of the end plate assembly 1, and the opening direction is located on the inner and outer peripheral walls of the end plate assembly 1, respectively. This allows the wiring terminal 21 and the phase wire terminal 22 to be inserted into the corresponding notches from the outer and inner peripheral walls of the end plate assembly 1, respectively. Moreover, the opening directions of the two notches are different, thus effectively solving the problem of incorrect insertion positions of different terminals.

[0087] In some embodiments, one end of the notch facing away from the outlet end is connected to the wire groove, so as to make the terminal in the notch abut and connect with the busbar in the corresponding wire groove.

[0088] like Figure 12 As shown, one end of the notch away from the opening end is connected to the wire groove. That is, the terminal can only be connected to the busbar in the wire groove when it is inserted to the bottom of the notch. When the terminal is not installed in place, or is accidentally pulled outward by a pulling force, it will be disengaged from the busbar and the connection will be released, so as to avoid the terminal moving outward and causing a short circuit in multiple winding units in the stator.

[0089] In some embodiments, the bottom wall height of the notch is not higher than the bottom wall height of the corresponding wire groove, and a limiting baffle is provided at one end of the notch away from the opening end to limit the displacement of the terminal along the length direction of the notch.

[0090] like Figure 7 and Figure 12 As shown, the bottom wall height of the notch is lower than the bottom wall height of the trough, so that after the terminal is inserted into the notch, its upper surface can abut against the bottom wall of the busbar in the trough and conduct. For different troughs, the bottom wall height is also different. Therefore, the terminal in the notch can only abut against the busbar in the corresponding trough and conduct, avoiding the same terminal from conducting with multiple busbars at the same time.

[0091] Furthermore, a limiting baffle is set at one end of the notch away from the notch end. When the terminal is inserted into the preset position of the notch, the limiting baffle can limit the terminal and prevent the terminal from being inserted too deeply, resulting in insufficient length for external welding terminals.

[0092] In some embodiments, the terminal is integrally formed with the corresponding busbar, or the terminal abuts against the corresponding busbar to conduct electricity;

[0093] The terminal includes a receiving groove extending outside the notch for clamping the wiring end of the winding unit.

[0094] like Figure 15 As shown, taking conductor assembly 5 as an example, the bus and terminal are manufactured in one piece, reducing assembly steps in production, realizing synchronous assembly of bus and terminal, and shortening working time;

[0095] The busbar bends at a preset position, forming a bend section 511 and a return bend section 512. The bend section 511 and the return bend section 512 together form the wire terminal 51. The middle position between the bend section 511 and the return bend section 512 is the receiving groove of the terminal.

[0096] The busbars of the other phases can adopt the same structure, but the corresponding notches and the bottom walls of the cable trays should be of equal height to facilitate the assembly of the integrated busbars and terminals.

[0097] In some embodiments, such as Figure 9 , Figure 10 and Figure 11As shown, only the outermost busbar uses an integrated busbar and terminal, while the rest use separate busbars and terminals.

[0098] Correspondingly, the outermost wire notch 126 is at the same height as the bottom wall of the wire trough, while the bottom wall height of the other notches is lower than the corresponding bottom wall height of the wire trough.

[0099] In some embodiments, the end tray assembly 1 includes a cable management box 12 and an end cap 11;

[0100] The cable tray is installed in the cable management box 12, and the end cap 11 is used to cover the open end of the cable tray;

[0101] The cable management box 12 and the end cap 11 are respectively provided with a buckle and a fastening port for fastening.

[0102] like Figure 11 , Figure 12 and Figure 13 As shown, an end cap 11 is used to cover the cable management box 12, further improving the neatness of the stator end and preventing the busbars in the cable tray from detaching. The end cap 11 adopts a modular design, with a splicing structure 113 between adjacent units. Each unit is equipped with a snap-fit ​​and a latching opening for engaging with the cable management box 12. Figure 7 and Figure 8 As shown, an end cap fastening opening 111 is provided on the end cap 11, and a box body buckle 122 is provided on the cable management box 12; or, as Figure 12 and Figure 13 As shown, an end cover buckle 114 is provided on the end cover 11, and a box body fastening opening 127 is provided inside the cable management box 12, which facilitates the removal and replacement of individual units and improves the maintenance convenience of the motor.

[0103] In some embodiments, to facilitate the assembly of the terminal and the notch, the opening cross-section of the notch is often larger than the cross-section of the terminal. Therefore, at the terminal assembly port, the opening end of the notch still exposes a large opening. Figure 8 and Figure 13 As shown, a baffle 112 is provided inside the end cover 11. When the end cover 11 is assembled with the cable management box 12, the baffle 112 can cover the opening end of the notch to prevent external debris from entering the notch and ensure good contact and conduction between the terminal and the busbar.

[0104] In some embodiments, the bus includes a phase bus and a conductor bus;

[0105] The two ends of the winding unit are the phase wire terminal 41 and the conductor terminal 42, respectively;

[0106] Phase line terminal 41 is connected to the phase line busbar of the corresponding phase, and conductor terminal 42 is connected to the conductor busbar.

[0107] like Figure 16 As shown, the three-phase motor adopts a star connection, that is, the phase wire terminal 41 of the corresponding phase wire is connected to the corresponding busbar, and all the wire terminals 42 are connected to the conductor assembly 5, thus realizing the star connection.

[0108] In some embodiments, the busbar includes three phase busbars, the coil winding 4 includes three winding units, and the two ends of the three winding units are connected end to end in sequence, and the connection point is connected to the corresponding phase busbar.

[0109] like Figure 17 As shown, the three-phase motor adopts a delta connection, that is, the three winding units in the unified coil winding 4 are connected end to end, and the phase line terminal 41 of the corresponding phase line is connected to the corresponding busbar, thus realizing the delta connection.

[0110] In addition to the motor stator disclosed in the above embodiments, the present invention also provides a motor including the above-described motor stator. The structure of other parts of the motor is described in the prior art and will not be repeated here.

[0111] Example 2:

[0112] Please refer to Figure 5 and Figure 6 An end plate assembly for end wiring of a motor stator;

[0113] The end plate assembly includes a cable management box 12 and a connector. The cable management box 12 has a ring-shaped structure and its outer diameter is not greater than the outer diameter of the stator support assembly 3 of the motor stator.

[0114] The connector is used for fixed connection with the stator support assembly 3;

[0115] Cable management box 12 includes:

[0116] Several cable slots are used to assemble busbars one-to-one;

[0117] Several notches are arranged along the length of the cable tray, and each notch is connected to at least one cable tray. The notches are provided with open ends that extend to the periphery of the cable tray 12.

[0118] like Figure 1 As shown, the cable management box 12 has a ring-shaped structure with an outer diameter not greater than the rotational outer diameter of the coil winding 4. The cable management box 12 has several concentrically arranged cable grooves inside, and several notches are connected to each other. Busbars can be fixedly arranged in the cable grooves, and terminals can be fixedly installed in the notches. The terminals are connected to the busbars, and the terminals extend from the opening end of the notches, extending the welding point of the busbar and the terminal of the coil winding 4 to the outside of the cable management box 12, which facilitates mechanized welding to connect the busbar and the terminal.

[0119] like Figure 5As shown, several notches are arranged in a circular array along the axis of the cable management box 12, meaning that the radial projections of the notches along the cable management box 12 do not overlap, thus avoiding mutual interference between different terminals and keeping the stator end neat. Furthermore, the terminals are arranged in a circular array along with the notches on the periphery of the cable management box 12, which helps to shorten the reserved length of the coil winding 4 terminal and reduce the reserved length of the coil winding 4 terminal at the stator shaft end. This reduces the accumulation of the coil winding 4 terminal at the stator shaft end, reduces the space occupied at the stator shaft end, and shortens the axial dimension of the motor.

[0120] In some embodiments, a plurality of ribs 123 are arranged radially along the cable tray 12 in the cable tray, which can abut against the busbar from the side, thereby making the other side of the busbar abut against the side wall of the cable tray, realizing the relative fixation of the busbar and the cable tray, and preventing the busbar from being displaced in the cable tray.

[0121] In some embodiments, the cable tray adopts a zigzag structure, and the busbar adopts the same zigzag structure. Therefore, after the busbar is installed in the cable tray, it can be fixed by means of the zigzag structure, which can also prevent the busbar from being displaced in the cable tray.

[0122] In some embodiments, a plurality of wire troughs are arranged concentrically, and a plurality of wire troughs are arranged in a stepped manner along the radial direction.

[0123] like Figure 5 As shown, several wire slots are arranged concentrically and in a stepped manner, which helps to avoid mutual interference between the busbars in different wire slots. Furthermore, when arranging the notches and terminals, the height of the notch positions corresponding to different wire slots can be designed so that the terminals in different notches can only be connected to the busbars in a single wire slot. This avoids a single terminal being connected to multiple busbars at the same time, thus preventing short circuits inside the stator. It also helps to reduce the assembly difficulty of terminals and notches, facilitates automated assembly, and improves processing efficiency.

[0124] In some embodiments, the height of the bottom wall of the cable tray in the inner ring is lower than the height of the bottom wall of the cable tray in the outer ring;

[0125] The height of the bottom wall of the notch shall not be higher than the height of the bottom wall of the corresponding connected cable trough;

[0126] The notch is open at one end and extends to the perimeter of the cable management box 12.

[0127] like Figure 5As shown, through the structural design of the inner wire groove of the cable management box 12, the height of the inner ring wire groove is lower than that of the outer ring wire groove. When designing the notch, the notch can be chosen to be the same height as the corresponding wire groove, which is convenient for the installation of terminals and busbars with integrated design. Alternatively, the notch can be chosen to be lower than the corresponding wire groove, which is convenient for the installation of terminals and busbars with separate design. Since the height of the notch is lower than the height of the corresponding wire groove, the terminal is pressed under the busbar. Since the notch is a single-end opening, the terminal is restricted by the closed end of the notch when it is assembled with the notch. Therefore, the terminal and the notch have a relatively stable relative assembly position, avoiding poor contact between the terminal and the busbar due to improper assembly.

[0128] In some embodiments, the notch includes a wiring notch 124 and a phase wire notch 125, the opening of the wiring notch 124 extending to the outer peripheral wall of the cable management box 12, and the opening of the phase wire notch 125 extending to the inner peripheral wall of the cable management box 12.

[0129] like Figure 3 , Figure 4 and Figure 5 As shown, with the three-phase motor position, the busbars include U-phase busbar 2U, V-phase busbar 2V and W-phase busbar 2W, which are arranged from the outside to the inside along the radial direction of the junction box 12. The wiring notch 124 includes U-phase wiring notch 124U, V-phase wiring notch 124V and W-phase wiring notch 124W, and the phase wire notch 125 includes U-phase phase wire notch 125U, V-phase phase wire notch 125V and W-phase phase wire notch 125W.

[0130] U-phase wiring notch 124U and U-phase phase line notch 125U are connected to the wire slots corresponding to U-phase busbar 2U; V-phase wiring notch 124V and V-phase phase line notch 125V are connected to the wire slots corresponding to V-phase busbar 2V; W-phase wiring notch 124W and W-phase phase line notch 125W are connected to the wire slots corresponding to W-phase busbar 2W.

[0131] There are three phase wire notches 125, corresponding to phases U, V, and W respectively. The number of wiring notches 124 is three times the number of coil windings 4. Therefore, the number of wiring notches 124 is greater than the number of phase wire notches 125. The opening of the wiring notch 124 extends to the outer peripheral wall of the cable management box 12, which facilitates the assembly of the terminal 21 and the welding of the phase wire terminals 41 of the coil winding 4 from the outside. The opening of the phase wire notch 125 extends to the inner peripheral wall of the cable management box 12, which facilitates the differentiation between the phase wire and the welding position of the phase wire terminal 41 and avoids mis-welding.

[0132] Meanwhile, the notch adopts a single-end opening design, and the terminal is inserted from the opening position and blocked by the closed end, ensuring the accurate assembly position relationship between the terminal and the notch.

[0133] In some embodiments, the height of the bottom wall of the cable tray in the inner ring is higher than the height of the bottom wall of the cable tray in the outer ring;

[0134] The height of the bottom wall of the notch shall not be higher than the height of the bottom wall of the corresponding connected cable trough;

[0135] An opening is provided at one end of the notch, and the opening extends to the periphery of the cable management box 12.

[0136] In contrast to the above embodiments, this embodiment adopts a design where the height of the inner ring groove is higher than that of the outer ring groove, which can also avoid the problem of mutual interference between the busbars and corresponding terminals in multiple grooves.

[0137] In some embodiments, the notch includes a wiring notch 124 and a phase wire notch 125, the opening of the wiring notch 124 extending to the inner peripheral wall of the cable management box 12, and the opening of the phase wire notch 125 extending to the outer peripheral wall of the cable management box 12.

[0138] To avoid interference between terminals and busbars of different phases, and to reduce the difficulty of terminal assembly and match the design of the cable tray, the opening of the wiring notch 124 is set on the inner peripheral wall of the cable management box 12, and the opening of the phase wire notch 125 is set on the outer peripheral wall of the cable management box 12.

[0139] In some embodiments, by setting the opening directions of the wiring notch 124 and the phase wire notch 125 on the same side, that is, both are set on the inner or outer peripheral wall, the function of avoiding interference between different phase terminals and busbars can also be achieved.

[0140] It is worth noting that when the opening of the phase wire notch 125 is opposite to that of the wiring notch 124, all the bottom wall heights of the phase wire notch 125 are equal and lower than the bottom wall height of the lowest layer of wire groove. This ensures that when the straight phase wire terminal 22 is inserted, it will not come into contact with the busbar of the non-corresponding phase. Furthermore, a conductive section is vertically provided at the end of the phase wire terminal 22 for contacting and conducting with the corresponding busbar.

[0141] In some embodiments, the connector includes a support body 121, which is fixedly connected to the cable management box 12 to increase the axial distance between the cable management box 12 and the stator support assembly 3 and / or its internal coil winding 4.

[0142] like Figure 4 As shown, the connector adopts a support body 121 integrally formed with the cable management box 12, which is fixedly connected to the stator support assembly 3 and / or the coil winding 4. Through the support of the support body 121, a preset gap is maintained between the cable management box 12 and the coil winding 4 to facilitate heat dissipation of the coil winding 4 and the busbar.

[0143] Furthermore, the cable management box 12 is positioned at the end of the coil winding 4, with the opening end of the notch close to the protruding position of the coil winding 4 terminal, further shortening the reserved length of the coil winding 4 terminal.

[0144] In some embodiments, an end cap 11 is also included, which is fixedly connected to the cable management box 12 and is used to cover the cable trough.

[0145] like Figure 2 and Figure 8 The cable management box 12 is provided with an end cover 11 to cover the cable groove, ensuring the neatness of the stator end and preventing the busbar from falling out of the cable groove.

[0146] Furthermore, the end cap 11 has a ring-shaped structure and is assembled from multiple individual units. Each unit has a splicing structure 113 at both ends for assembly. Each unit also has a latch and a snap-fit ​​opening for fastening with the cable management box 12, such as the end cap snap-fit ​​opening 111 on the unit and the box body latch 122 on the cable management box 12. Figure 12 and Figure 13 The end cap buckle 114 is provided on the single unit shown, and the box body fastening opening 127 is provided on the cable management box 12.

[0147] In some embodiments, a baffle 112 is provided on one side of the end cap 11 to block the radial end opening of the wiring notch 124.

[0148] A baffle 112 is provided on one side of the end cap 11 to seal the gap after the notch is assembled with the terminal and prevent foreign objects from entering.

[0149] Example 3:

[0150] Please refer to Figure 1 , Figure 2 , Figure 7 and Figure 9 As shown, a stator end wiring structure is used for end wiring of a motor stator;

[0151] The stator end wiring structure includes:

[0152] The end plate assembly 1 includes several grooves and several notches. The grooves are arranged concentrically and in a stepped manner. The notches are arranged in a ring array and are connected to at least one set of grooves. One end of the notch is an open end, and the open end of the notch extends to the outer or inner peripheral wall of the end plate assembly 1.

[0153] Busbar assembly 2 includes several busbars and several terminals. The busbars are fixedly installed in a one-to-one correspondence with the wire troughs, and the terminals are fixedly installed in a one-to-one correspondence with the notches. The terminals are only connected to the corresponding busbars, and the terminals extend from the opening end of the notches.

[0154] like Figure 7As shown, several concentric grooves are arranged inside the end plate assembly 1, and several notches are connected to each groove, extending to the peripheral wall of the end plate assembly 1. The grooves are used to fix the busbars in the busbar assembly 2, giving the busbars a fixed installation position. The terminals in the busbar assembly 2 can extend to the outside of the end plate assembly 1 through the notches. That is, the terminals of the coil winding 4 only need to contact and conduct with the terminals outside the end plate assembly 1 to achieve conduction between the terminals of the coil winding 4 and the busbar. In the design of the notches, they are arranged in a ring array around the periphery of the end plate assembly 1, which allows the terminals to contact and conduct with the nearest terminals. This helps to shorten the length of the reserved terminals of the coil winding 4 and avoids interference between different terminals. By shortening the length of the terminals, the accumulation of copper wire at the stator shaft end is reduced, which reduces the space occupied in the stator axial direction and keeps the stator axial direction neat.

[0155] Meanwhile, because the cable trays and notches fix the positions of the busbars and terminals, the terminals have fixed welding positions, which facilitates automated welding of the terminals and improves production efficiency.

[0156] In some embodiments, a plurality of terminals are arranged in a ring array about the end plate assembly 1, and the terminals are integrally formed with the bus.

[0157] The terminals are arranged in a ring array relative to the end plate assembly 1, allowing the terminals of the coil windings 4 at different positions of the stator to achieve contact and conduction with the terminals through a relatively short reserved length; at the same time, the terminals and busbars are manufactured using an integral molding method, such as setting a bend at the notch position of the busbar, i.e. Figure 15 As shown, the bending position includes a bending section 511 and a return bending section 512. There is a receiving cavity between the bending section 511 and the return bending section 512. The receiving cavity can extend to the outside of the notch and can clamp the terminal of the coil winding 4.

[0158] In some embodiments, a plurality of terminals are arranged in a ring array about the end panel assembly 1, and the terminals are in contact with the busbar.

[0159] like Figure 7 As shown, the terminals and busbars adopt a split design. The terminals are U-shaped, with the closed end abutting against the busbar and the open end extending to the outer periphery of the end plate assembly 1. The middle position of the two side arms is a receiving groove for accommodating the wiring terminals of the welding coil winding 4.

[0160] The separate design of the busbar and terminals facilitates the separate assembly of the busbar and terminals with the terminal panel assembly 1, allowing them to be replaced individually and improving the convenience of maintenance.

[0161] In some embodiments, the bottom wall height of the notch is not higher than the bottom wall height of the corresponding cable tray, and the terminal in the notch abuts and conducts with the bottom of the busbar in the cable tray.

[0162] like Figure 7 As shown, the bottom wall height of the notch is lower than the bottom wall height of the corresponding wire trough. Therefore, after the terminal is installed into the notch and the busbar is installed into the wire trough, the actual installation height of the terminal is lower than the height of the busbar. By designing the height difference between the bottom wall of the notch and the wire trough and the design height of the terminal, the terminal can be inserted from the opening end of the notch and directly contact the busbar for conduction. Furthermore, since multiple wire troughs are arranged in a stepped manner, the height of the notch corresponding to different wire troughs can be different. Therefore, the terminal will not interfere with the busbar when it is assembled, which helps to reduce the difficulty of terminal assembly and replacement, and improve assembly speed and maintenance convenience.

[0163] In some embodiments, the terminal has a U-shaped structure with an open end including a receiving groove for holding the wiring terminal of the coil winding 4. The receiving groove is located outside the end plate assembly 1, and its closed end is in contact with the busbar.

[0164] like Figure 7 As shown, the terminal is U-shaped, so the open end is easy to set up a receiving groove to clamp the wiring end of the coil winding 4, which is convenient for welding.

[0165] In some embodiments, the terminals are I-shaped or L-shaped, and the ends also extend to the outer periphery of the end plate assembly 1, and are provided with welding points for welding the terminals of the coil winding 4, which can also realize the function of connecting the terminals and the busbar.

[0166] In some embodiments, the length direction of the notch is consistent with the radial direction of the end plate assembly 1, and the other end of the notch is a closed end, used to limit the displacement of the terminal along the length direction of the notch.

[0167] like Figure 5 , Figure 6 and Figure 7 As shown, the length direction of the notch is consistent with the radial direction of the end plate assembly 1, and the open end is located on the peripheral wall of the end plate assembly 1, while the other end is a closed end. Therefore, when assembling the terminal, it can be directly inserted from the open end of the notch on the peripheral wall of the end plate assembly 1. When the inserted end of the terminal abuts against the closed end of the notch, it indicates that the terminal is correctly assembled. Thus, the detection step of the terminal assembly position can be reduced during the assembly process, thereby simplifying the production process, improving production efficiency, and ensuring the accuracy of the terminal assembly position.

[0168] In some embodiments, the notch includes a wiring notch 124 and a phase wire notch 125;

[0169] The terminals include wiring terminal 21 and phase terminal 22;

[0170] Terminal 21 is installed in a one-to-one correspondence with wiring notch 124 for connection with the wiring terminal of coil winding 4;

[0171] Phase wire terminals 22 and phase wire notches 125 are installed one-to-one to connect with the phase wire of the power supply.

[0172] Among them, terminal 21 is used to abut the terminal of the conducting coil winding 4, while phase terminal 22 is used to abut the conducting power phase line, and both terminal 21 and phase terminal 22 are connected to the busbar of the corresponding phase.

[0173] Taking a three-phase motor with three sets of coil windings 4 as an example, it includes three busbars, namely U-phase busbar 2U, V-phase busbar 2V and W-phase busbar 2W; each corresponding is provided with corresponding terminals 21 and phase terminals 22, such as U-phase terminal 21U, V-phase terminal 21V and W-phase terminal 21W, U-phase phase terminal 22U, V-phase phase terminal 22V and W-phase phase terminal 22W;

[0174] Terminal assembly 1 includes a U-phase wiring notch 124U, a U-phase phase wire notch 125U, a V-phase wiring notch 124V, a V-phase phase wire notch 125V, a W-phase wiring notch 124W, and a W-phase phase wire notch 125W;

[0175] U-phase terminal 21U is installed correspondingly to U-phase notch 124U, and U-phase phase wire terminal 22U is installed correspondingly to U-phase phase wire notch 125U; V-phase terminal 21V is installed correspondingly to V-phase notch 124V, and V-phase phase wire terminal 22V is installed correspondingly to V-phase phase wire notch 125V; W-phase terminal 21W is installed correspondingly to W-phase notch 124W, and W-phase phase wire terminal 22W is installed correspondingly to W-phase phase wire notch 125W.

[0176] U-phase terminal 21U and U-phase phase line terminal 22U are connected to U-phase busbar 2U, V-phase terminal 21V and V-phase phase line terminal 22V are connected to V-phase busbar 2V, and W-phase terminal 21W and W-phase phase line terminal 22W are connected to W-phase busbar 2W.

[0177] It is worth noting that, in some embodiments, the phase terminal 22 includes a wire loop for crimping the phase wire.

[0178] In some embodiments, the open end of the phase wire notch 125 and the open end of the wiring notch 124 are located on different peripheral wall sides of the end plate assembly 1.

[0179] like Figure 5 and Figure 6As shown, the opening ends of the phase wire notch 125 and the wiring notch 124 are respectively set on different peripheral walls of the end plate assembly 1. For example, the opening end of the wiring notch 124 is set on the outer peripheral wall of the end plate assembly 1, so that the wiring terminal 21 can be inserted radially from the outer peripheral wall of the end plate assembly 1. The opening end of the phase wire notch 125 is set on the inner peripheral wall of the end plate assembly 1, so that the phase wire terminal 22 can be inserted radially from the inner peripheral wall of the end plate assembly 1. This makes it easier to distinguish between the wiring notch 124 and the phase wire notch 125 and avoids confusion in the installation positions of the wiring terminal 21 and the phase wire terminal 22.

[0180] In some embodiments, a plurality of ribs 123 are provided radially along the end plate assembly 1 in the cable tray for abutting and fixing with the busbar sidewall in the cable tray.

[0181] like Figure 7 As shown, the cross-section of the busbar is circular or rectangular. Taking a flat busbar with a rectangular cross-section as an example, when its thickness is less than the width of the trough, there is a margin of movement within the trough, which causes the busbar to be unstable during installation. Therefore, ribs 123 are added to abut against the busbar from the side wall direction, thereby eliminating the margin of movement of the busbar within the trough and ensuring the stability of its installation position.

[0182] 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.

[0183] The motor stator and motor provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. An electric machine stator, characterized in that, The utility model relates to a stator end wiring structure of a motor, comprising: a coil winding (4) comprising a plurality of winding units, both terminals of the winding units extending to the same end along the rotation axis of the coil winding (4); a stator end wiring structure fixedly arranged at one end of the rotation axis of the coil winding (4) and used for one-to-one corresponding abutting conduction with the terminals of all the winding units; the stator end wiring structure comprises: an end disc assembly (1) comprising a plurality of wire slots and a plurality of notches, the wire slots being concentrically arranged and arranged in a stepped manner, the notches being arranged in a ring array, the length direction of the notches being consistent with the radial direction of the end disc assembly (1), one end of the notches being an open end, the open end of the notches extending to the outer circumferential wall or the inner circumferential wall of the end disc assembly (1), and the end opposite to the open end of the notches being in conduction with the wire slots; the bottom wall height of the notches is not higher than the bottom wall height of the corresponding wire slots, so that the upper surface of the terminal can be in abutting conduction with the bottom wall of the busbar in the wire slot after the terminal is inserted into the notch; and a limiting baffle is arranged at the end opposite to the open end of the notch, for limiting the displacement of the terminal along the length direction of the notch.

2. The motor stator of claim 1, wherein The stator end wiring structure further comprises: a busbar assembly (2) comprising a plurality of busbars and a plurality of terminals, the busbars being fixedly installed in one-to-one correspondence with the wire slots, the terminals being fixedly installed in one-to-one correspondence with the notches, the terminals being in conduction only with the corresponding busbars, and the terminals extending to the outside of the notches; wherein the end disc assembly (1) is coaxially and fixedly connected to the end of the coil winding (4).

3. The motor stator of claim 2, wherein, The notches comprise line connection notches (124) and phase line notches (125); the terminals comprise line connection terminals (21) and phase line terminals (22), the line connection terminals (21) being used for conduction with the terminals of the winding units, and the phase line terminals (22) being used for conduction with the phase lines of the power supply; the line connection terminals (21) and the line connection notches (124) are arranged in one-to-one correspondence; the phase line terminals (22) and the phase line notches (125) are arranged in one-to-one correspondence.

4. The motor stator of claim 3, wherein The open ends of the line connection notches (124) and the phase line notches (125) are in opposite directions.

5. The motor stator of claim 2, wherein, The terminals are integrally formed with the corresponding busbars, or the terminals are in abutting conduction with the corresponding busbars; the terminals comprise accommodation grooves extending to the outside of the notches, for clamping the terminals of the winding units.

6. The motor stator of claim 2, wherein, The end disc assembly (1) comprises a wire arranging box (12) and an end cover (11); the wire slots are arranged in the wire arranging box (12), and the end cover (11) is used for covering the open ends of the wire slots; the wire arranging box (12) and the end cover (11) are respectively provided with buckles and buckle openings for buckling.

7. An electrical machine stator according to any one of claims 2 to 6, characterised in that, The busbars comprise phase line busbars and conductive body busbars; both ends of the winding units are respectively phase line terminals (41) and conductive body terminals (42); the phase line terminals (41) are in conduction with the phase line busbars of the corresponding phases, and the conductive body terminals (42) are in conduction with the conductive body busbars.

8. An electrical machine stator according to any one of claims 2 to 6, characterised in that, The bus bars include three phase line bus bars, the coil winding (4) includes three winding units, and two ends of the three winding units are sequentially connected in a head-to-tail manner, and the connection points are connected with the corresponding phase line bus bars.

9. An electric machine characterized by The electric machine stator comprises the electric machine stator as claimed in any one of claims 1-8.

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