Stator assembly and hub motor

Abstract

The utility model relates to the technical field of motors, and provides a stator assembly and a hub motor, the stator assembly comprises a stator support, a plurality of stator windings and an in-phase confluence member, and the plurality of stator windings are arranged on the stator support along the circumferential direction of the stator support; the in-phase confluence piece is arranged on one axial side of the stator support, and the in-phase confluence piece and the stator support are arranged in an insulated mode; the lead wire end of the same-phase stator winding in the plurality of stator windings is connected with the same-phase confluence piece, and the same-phase confluence piece is provided with a wiring part used for being connected with a wire harness. According to the stator assembly, the in-phase confluence piece is arranged on the axial side of the stator support, and the lead ends of the in-phase stator windings are connected with the in-phase confluence piece, so that confluence is achieved; and the wiring part on the same-phase confluence piece is connected with the wire harness, so that the problem that the lead end is inconvenient to connect with the wire harness is solved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a stator assembly and a hub motor. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy. The motor consists of a stator part and a rotor part. The stator part includes a stator bracket and a stator winding mounted on the stator bracket. When each stator winding is energized, a corresponding magnetic field is formed to magnetically drive the rotor part.

[0003] The lead ends of the stator windings are connected to an external power source through a wiring harness to achieve power supply. Since the number of stator windings is usually large, that is, the number of lead ends is large, it is inconvenient to connect the lead ends to the wiring harness. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a stator assembly and a hub motor to solve the problem of inconvenient connection between the lead terminal and the wiring harness.

[0005] An embodiment of the first aspect of the present application proposes a stator assembly, comprising a stator support, a plurality of stator windings and a same-phase busbar, wherein the plurality of stator windings are arranged on the stator support at intervals along the circumferential direction of the stator support; the same-phase busbar is arranged on one axial side of the stator support, and the same-phase busbar is insulated from the stator support; the lead ends of the same-phase stator windings in the plurality of stator windings are connected to the same-phase busbar, and the same-phase busbar is provided with a wiring portion for connecting to a wiring harness.

[0006] The stator assembly provided in the embodiment of the present application realizes current convergence by arranging a same-phase busbar on one axial side of the stator bracket, and connecting the lead ends of the same-phase stator windings to the same-phase busbar; and then connecting to the wiring harness through the wiring part on the same-phase busbar, thereby solving the problem of inconvenient connection between the lead ends and the wiring harness.

[0007] In some embodiments, the same-phase busbars extend along the circumference of the stator support.

[0008] In some embodiments, the stator assembly further comprises an insulating member disposed on one axial side of the stator bracket, the insulating member extends along the circumferential direction of the stator bracket, and the in-phase busbar is disposed on the insulating member.

[0009] In some embodiments, a mounting groove is provided on a side surface of the insulating member facing away from the stator bracket, and the same-phase busbar is placed in the mounting groove.

[0010] In some embodiments, the plurality of stator windings are divided into multi-phase stator windings, and each phase of the stator winding is connected to a corresponding in-phase busbar.

[0011] In some embodiments, the stator assembly further includes a connection block, which is located in the mounting groove and connected to the same-phase busbar.

[0012] In some embodiments, a first connecting groove is provided on the connecting block, and the lead end of the stator winding is connected in the first connecting groove.

[0013] In some embodiments, the connection portion is a connection post, and the connection ends of the same-phase busbar and the connection post are respectively located on two axial sides of the stator bracket.

[0014] In some embodiments, the stator assembly further includes a neutral bus, to which the neutral end of the stator winding is connected; the neutral bus and the terminal of the terminal post are located on the same side of the stator bracket.

[0015] In some embodiments, the stator assembly also includes an insulating seat fixed on the stator bracket and a conductive member fixed on the insulating seat; the neutral bus is installed on the conductive member, a second connecting groove is provided on the conductive member, and the neutral end of the stator winding is connected to the second connecting groove.

[0016] The second aspect of the present application proposes a hub motor, which includes a shell, a stator shaft, a rotor assembly and the stator assembly as described in the first aspect, wherein the shell is rotatably mounted on the stator shaft, the rotor assembly is fixed in the shell, and the stator assembly is in the shell and fixed on the stator shaft.

[0017] The hub motor adopts all the embodiments of the above-mentioned stator assembly, and thus has at least all the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0018] In some embodiments, a connecting channel connecting the two sides of the stator bracket is provided on the stator bracket and / or the stator shaft of the stator assembly; the hub motor also includes a fluid inlet pipe and a fluid return pipe passing through the stator shaft, one of the fluid inlet pipe and the fluid return pipe is connected to one side of the stator bracket in the axial direction through the connecting channel, and the other of the fluid inlet pipe and the fluid return pipe is connected to the other side of the stator bracket in the axial direction.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 is a schematic diagram of the structure of the hub motor provided in an embodiment of the present application;

[0022] Figure 2 yes Figure 1 The AA section view of the wheel hub motor shown;

[0023] Figure 3 yes Figure 2 The enlarged view of point B in the middle;

[0024] Figure 4 is a structural schematic diagram of a stator assembly provided in an embodiment of the present application;

[0025] Figure 5 is a structural schematic diagram of a stator bracket and a stator winding provided in an embodiment of the present application;

[0026] Figure 6 yes Figure 5 Enlarged view of point C in the middle;

[0027] Figure 7 yes Figure 5 A structural diagram from another perspective;

[0028] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0029] The meanings of the marks in the figure are:

[0030] 100. Hub motor;

[0031] 10. stator assembly; 11. stator bracket; 12. stator winding; 12a. first phase stator winding; 12b. second phase stator winding; 12c. third phase stator winding; 121. lead terminal; 122. neutral terminal; 13. same phase busbar; 13a. first phase busbar; 13b. second phase busbar; 13c. third phase busbar; 131. connection part; 1311. connection terminal; 14. insulating member; 141. mounting groove; 15. stopper; 16. connection block; 161. first connection groove; 17. neutral busbar; 18. mounting structure; 181. insulating seat; 182. conductive member; 1821. second connection groove; 19. injection member;

[0032] 20. Shell; 21. Small cover plate;

[0033] 30. Rotor assembly;

[0034] 40. stator shaft; 41. perforation;

[0035] 50. Rotary transformer;

[0036] 60. Brake disc;

[0037] 70, fluid inlet pipe; 71, pipe joint; 72, connecting channel; 721, first section; 722, second section;

[0038] 80. Fluid return pipe;

[0039] 90. Wiring harness;

[0040] 200. Rim. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] The embodiment of the first aspect of the present application provides a stator assembly. Figure 2 , Figure 4 , Figure 5 and Figure 6 The stator assembly 10 includes a stator support 11, a plurality of stator windings 12, and a same-phase busbar 13. The plurality of stator windings 12 are arranged on the stator support 11 at intervals along the circumferential direction of the stator support 11; the same-phase busbar 13 is arranged on one axial side of the stator support 11, and the same-phase busbar 13 is insulated from the stator support 11; the lead ends 121 of the same-phase stator windings 12 in the plurality of stator windings 12 are connected to the same-phase busbar 13, and the same-phase busbar 13 is provided with a connection portion 131 for connecting to the wiring harness 90.

[0050] The stator support 11 is used to install the stator winding 12. The stator support 11 is annular in shape. The circumferential direction of the stator support 11 refers to Figure 4In the Y direction shown in FIG, a plurality of stator windings 12 are arranged on the stator support 11 at intervals along the circumferential direction of the stator support 11, that is, a plurality of stator windings 12 are arranged on the stator support 11 at intervals along the Y direction. The plurality of stator windings 12 are arranged at intervals, that is, two adjacent stator windings 12 are not in contact with each other.

[0051] It should be noted that the stator winding 12 includes a stator core and a coil wound around the stator core.

[0052] The axial direction of the stator support 11 is Figure 4 In the X direction shown in , the same-phase busbar 13 is arranged on one axial side of the stator bracket 11, that is, the same-phase busbar 13 is arranged on one side of the stator bracket 11 in the X direction. It should be noted that the same-phase busbar 13 is a device for merging the same-phase stator windings 12 among a plurality of stator windings 12, wherein the same-phase stator winding 12 can be a U-phase winding, a V-phase winding or a W-phase winding.

[0053] It should be noted that the multiple stator windings 12 may include three-phase windings U, V, and W, or the multiple stator windings 12 may include two-phase windings among U, V, and W, or the multiple stator windings 12 may also include one-phase winding among U, V, and W.

[0054] It can be understood that the same-phase busbar 13 can be a sheet-like structure or a strip-like structure extending along the circumferential direction of the stator support 11 .

[0055] The same-phase busbar 13 is made of a conductive material, such as copper, aluminum, etc.

[0056] The same-phase busbar 13 is insulated from the stator bracket 11, that is, the same-phase busbar 13 does not contact the stator bracket 11. For example, the same-phase busbar 13 is mounted on the insulating member 14, and the insulating member 14 is mounted on the stator bracket 11; or, the same-phase busbar 13 can be spaced from the stator bracket 11, and the injection member 19 is filled between the two.

[0057] The lead ends 121 of the same-phase stator windings 12 among the plurality of stator windings 12 are connected to the same-phase busbars 13 ; wherein, one, two or three same-phase busbars 13 may be provided as required. When one same-phase busbar 13 is provided, the same-phase busbar 13 is connected to the lead end 121 of one phase of the stator winding 12; when two same-phase busbars 13 are provided, one of the same-phase busbars 13 is connected to the lead end 121 of one phase of the stator winding 12, and the other same-phase busbar 13 is connected to the lead end 121 of the stator winding 12 of the other phase; when three same-phase busbars 13 are provided, one of the same-phase busbars 13 is connected to the lead end 121 of one phase of the stator winding 12, the other same-phase busbar 13 is connected to the lead end 121 of the stator winding 12 of the other phase, and another same-phase busbar 13 is connected to the lead end 121 of another phase of the stator winding 12.

[0058] The structure of the wiring portion 131 is not limited in this embodiment, as long as the wiring portion 131 can be connected to the wiring harness 90. For example, the wiring portion 131 can be a wiring post, a wiring hole, etc.

[0059] The stator assembly 10 provided in the embodiment of the present application realizes current convergence by setting a same-phase busbar 13 on one axial side of the stator bracket 11, and connecting the lead end 121 of the same-phase stator winding 12 to the same-phase busbar 13; and then connecting to the wiring harness 90 through the wiring portion 131 on the same-phase busbar 13, so that the connection between the lead end 121 and the wiring harness 90 is more convenient.

[0060] Please also refer to Figure 4 and Figure 5 In some embodiments, the same-phase busbar 13 extends along the circumference of the stator support 11 .

[0061] That is, the in-phase busbar 13 extends along the Y direction. It can be understood that the in-phase busbar 13 can be a circular structure or a C-shaped structure.

[0062] By adopting the above technical solution, each stator winding 12 is closer to the same-phase bus 13 , so as to reduce the length of the lead end 121 , which is beneficial for connecting the lead end 121 to the same-phase bus 13 .

[0063] Please also refer to Figure 2 , Figure 3 and Figure 6 In some embodiments, the stator assembly 10 further includes an insulating member 14 disposed on one axial side of the stator bracket 11 , the insulating member 14 extends along the circumferential direction of the stator bracket 11 , and the in-phase busbar 13 is disposed on the insulating member 14 .

[0064] The insulating member 14 is used to separate the stator support 11 from the same-phase busbar 13 to prevent the same-phase busbar 13 from being electrically connected to the stator support 11 .

[0065] The manner in which the insulating member 14 is fixed to the stator bracket 11 is not limited in this embodiment. For example, the insulating member 14 may be fixed to the stator bracket 11 by bonding; or, the insulating member 14 may be fixed to the stator bracket 11 by fasteners; or, the insulating member 14 may be fixed to the stator bracket 11 by snap-fitting.

[0066] Optionally, the insulating member 14 extends along the circumference of the stator support 11 . It can be understood that the insulating member 14 may be a C-shaped structure or a ring-shaped structure.

[0067] The same-phase busbar 13 is disposed on the insulating member 14 , that is, the same-phase busbar 13 and the insulating member 14 are disposed on the same side of the stator support 11 in the axial direction thereof.

[0068] The manner in which the in-phase bus 13 is fixed to the insulating member 14 is not limited in this embodiment. For example, the in-phase bus 13 may be fixed to the insulating member 14 by bonding; or, the in-phase bus 13 may be fixed to the insulating member 14 by fasteners; or, the in-phase bus 13 may be fixed to the insulating member 14 by snap-fitting.

[0069] In the embodiment of the present application, the in-phase busbar 13 is pre-fixed by the insulating member 14 , which can not only achieve the purpose of insulating the in-phase busbar 13 from the stator bracket 11 , but also facilitate the subsequent casting of the glue injection member 19 .

[0070] Please also refer to Figure 2 , Figure 3 and Figure 6 In some embodiments, a mounting groove 141 is provided on a side surface of the insulating member 14 facing away from the stator support 11 , and the same-phase busbar 13 is placed in the mounting groove 141 .

[0071] Specifically, the mounting groove 141 extends along the circumference of the stator support 11 . For example, the mounting groove 141 may be a C-shaped groove or an annular groove.

[0072] Among them, the number of mounting grooves 141 is not less than the number of in-phase busbars 13. For example, three in-phase busbars 13 are provided along the radial direction of the stator bracket 11, and three mounting grooves 141 are provided along the radial direction of the stator bracket 11; or, two in-phase busbars 13 are provided along the radial direction of the stator bracket 11, and two or three mounting grooves 141 are provided along the radial direction of the stator bracket 11; or, one in-phase busbar 13 is provided, and one, two or three mounting grooves 141 are provided.

[0073] Optionally, the slot width of the installation slot 141 is greater than the width of the same-phase busbar 13, so that the same-phase busbar 13 can be placed in the installation slot 141. The slot width direction of the installation slot 141 and the width direction of the same-phase busbar 13 are both radial directions of the stator bracket 11.

[0074] By setting a mounting groove 141 on the insulating part 14 and placing the same-phase bus 13 in the mounting groove 141, the side wall of the mounting groove 141 can limit the same-phase bus 13 to prevent the same-phase bus 13 from moving radially along the stator bracket 11; when there are more than two same-phase bus 13, contact between two adjacent same-phase bus 13 is avoided.

[0075] In other embodiments, the mounting groove 141 may not be provided on the insulating member 14 , and the same-phase busbar 13 may be directly fixed to a side surface of the insulating member 14 facing away from the stator support 11 .

[0076] Please refer to Figure 6 In some embodiments, the in-phase busbar 13 is placed in the mounting groove 141, and the stator assembly 10 also includes a limit member 15 fixed on the insulating member 14, and the limit member 15 covers at least a portion of the opening of the mounting groove 141 to limit the in-phase busbar 13 from being separated from the mounting groove 141.

[0077] It can be understood that the limiting member 15 can be fixed to the insulating member 14 by a fastener; or, the limiting member 15 can be bonded to the insulating member 14 , or, the limiting member 15 can be snap-connected to the insulating member 14 .

[0078] The shape of the limiting member 15 is not limited in this embodiment. For example, the limiting member 15 may be a circular member; or the limiting member 15 may be a strip member extending along the circumferential direction of the stator bracket 11 .

[0079] When the limiting member 15 is a circular member, a plurality of limiting members 15 are arranged at intervals along the circumference of the stator support 11, and the plurality of limiting members 15 cover a portion of the opening of the mounting groove 141 to limit the same-phase busbar 13 in the mounting groove 141, so as to limit the same-phase busbar 13 in the mounting groove 141. When the limiting member 15 is a strip-shaped member, the limiting member 15 may be a C-shaped structure or an annular structure, and the limiting member 15 may cover a portion of the opening or the entire opening of the mounting groove 141 to limit the same-phase busbar 13 in the mounting groove 141, so as to limit the same-phase busbar 13 in the mounting groove 141.

[0080] In other embodiments, the limiting member 15 may also be fixed on the stator bracket 11 .

[0081] Please also refer to Figure 5 and Figure 6 In some embodiments, the plurality of stator windings 12 are divided into multi-phase stator windings 12 , and each phase of the stator winding 12 is connected to a corresponding same-phase busbar 13 .

[0082] Optionally, the multi-phase stator winding 12 is respectively a first-phase stator winding 12a, a second-phase stator winding 12b and a third-phase stator winding 12c; three same-phase busbars 13 are provided, the same-phase busbar 13 connected to the lead end 121 of the first-phase stator winding 12a is the first-phase busbar 13a, the same-phase busbar 13 connected to the lead end 121 of the second-phase stator winding 12b is the second-phase busbar 13b, and the same-phase busbar 13 connected to the lead end 121 of the third-phase stator winding 12c is the third-phase busbar 13c.

[0083] Optionally, three in-phase busbars 13 may be located on the same side of the stator bracket 11, and the three in-phase busbars 13 may be arranged at intervals in the radial direction of the stator bracket 11. Of course, one of the in-phase busbars 13 may be located on one axial side of the stator bracket 11, and the other two in-phase busbars 13 may be located on the other axial side of the stator bracket 11.

[0084] In other embodiments, based on the case where multiple stator windings 12 include a first phase stator winding 12a, a second phase stator winding 12b and a third phase stator winding 12c; a same-phase bus 13 is provided, and the same-phase bus 13 can be connected to the lead end 121 of the first phase stator winding 12a, the second phase stator winding 12b or the third phase stator winding 12c.

[0085] In other embodiments, based on the case where multiple stator windings 12 include a first-phase stator winding 12a, a second-phase stator winding 12b and a third-phase stator winding 12c; two same-phase busbars 13 are provided, and the two same-phase busbars 13 are connected one-to-one with the lead ends 121 of the first-phase stator winding 12a and the second-phase stator winding 12b, or, the two same-phase busbars 13 are connected one-to-one with the lead ends 121 of the first-phase stator winding 12a and the third-phase stator winding 12c respectively, or, the two same-phase busbars 13 are connected one-to-one with the lead ends 121 of the second-phase stator winding 12b and the third-phase stator winding 12c respectively.

[0086] Please refer to Figure 6 In some embodiments, a mounting groove 141 is provided on the insulating member 14 , and the stator assembly 10 further includes a connecting block 16 , which is located in the mounting groove 141 and connected to the same-phase busbar 13 .

[0087] It can be understood that the connection block 16 can be integrally formed with the in-phase busbar 13; or, the connection block 16 can be fixed on the in-phase busbar 13 (using but not limited to welding, riveting, crimping, clamping, threaded connection, fastener connection, etc.).

[0088] By arranging the connection block 16 in the installation groove 141 and connecting it to the same-phase busbar 13 , the welding position is raised, which is beneficial to the welding and fixing of the lead terminal 121 .

[0089] In other embodiments, the connection block 16 may not be provided, and the lead end 121 may be directly welded to the same-phase busbar 13 .

[0090] In some embodiments, a first connecting groove 161 is provided on the connecting block 16 , and the lead end 121 of the stator winding 12 is connected to the first connecting groove 161 .

[0091] Optionally, the connecting block 16 is arranged along the length direction of the in-phase busbar 13, and the first connecting groove 161 is a through groove extending along the length direction of the in-phase busbar 13. Such a design can increase the contact area between the connecting block 16 and the lead end 121, which is beneficial to improving the stability of the connection between the lead end 121 and the connecting block 16.

[0092] By placing the lead end 121 in the first connection groove 161 , the high temperature during welding will not have a significant impact on the insulating member 14 .

[0093] Please also refer to Figures 5 to 7 In some embodiments, the connection portion 131 on the same-phase busbar 13 is a terminal post, and the connection terminals 1311 of the same-phase busbar 13 and the terminal post are respectively located on both axial sides of the stator bracket 11 .

[0094] It can be understood that the terminal post can be integrally formed with the same-phase busbar 13; alternatively, the terminal post can also be fixed on the same-phase busbar 13 (using but not limited to welding, riveting, crimping, clamping, threaded connection, fastener connection, etc.).

[0095] It can be understood that the terminal passes through the stator bracket 11 along the axial direction of the stator bracket 11, that is, the two ends of the terminal are respectively located on the axial sides of the stator bracket 11; wherein, one end of the terminal is connected to the same-phase bus 13, and the other end of the terminal (that is, the terminal 1311) is connected to the wiring harness 90.

[0096] Such a design can fully utilize the space on both sides of the axial direction of the stator bracket 11 , which is beneficial to the layout of various components in the housing 20 of the hub motor 100 .

[0097] In other embodiments, the same-phase busbar 13 and the terminal 1311 of the terminal post may also be located on the same side of the stator bracket 11 . In this case, the terminal post does not need to pass through the stator bracket 11 .

[0098] Please also refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, the stator assembly 10 further includes a neutral bus 17 , to which the neutral end 122 of the stator winding 12 is connected; the neutral bus 17 and the terminal 1311 of the terminal post are located on the same side of the stator bracket 11 .

[0099] Optionally, the neutral current collector 17 extends along the circumference of the stator support 11 , that is, the neutral current collector 17 extends along the Y direction. It can be understood that the neutral current collector 17 can be a circular structure or a C-shaped structure.

[0100] The neutral busbar 17 is made of a conductive material, such as copper, aluminum, etc.

[0101] One neutral busbar 17 is provided, and the neutral ends 122 of the plurality of stator windings 12 are all connected to the neutral busbar 17. The neutral busbar 17 is insulated from the stator bracket 11, that is, the neutral busbar 17 does not contact the stator bracket 11.

[0102] From the above, it can be seen that the in-phase bus 13 and the terminal 1311 of the terminal are respectively located on the axial sides of the stator bracket 11, and the neutral bus 17 and the terminal 1311 of the terminal are located on the same side of the stator bracket 11. Therefore, the in-phase bus 13 and the neutral bus 17 are respectively located on the axial sides of the stator bracket 11.

[0103] By arranging the in-phase busbar 13 on one axial side of the stator bracket 11 and arranging the neutral busbar 17 and the terminal 1311 of the terminal post on the other axial side of the stator bracket 11, the space on both axial sides of the stator bracket 11 can be fully utilized, which is beneficial to the layout of various components in the housing 20.

[0104] Please also refer to Figure 7 and Figure 8 In some embodiments, the stator assembly 10 also includes an insulating seat 181 fixed on the stator bracket 11 and a conductive member 182 fixed on the insulating seat 181; the neutral bus 17 is installed on the conductive member 182, and the conductive member 182 is provided with a second connecting groove 1821, and the neutral end 122 of the stator winding 12 is connected to the second connecting groove 1821.

[0105] The insulating seat 181 and the conductive member 182 constitute a mounting structure 18 . The number of mounting structures 18 is not limited, as long as the neutral current collector 17 mounted on the mounting structure 18 does not contact the stator bracket 11 .

[0106] Optionally, a plurality of mounting structures 18 are arranged at intervals along the circumference of the stator support 11 , and the neutral bus 17 is mounted on a plurality of conductive members 182 .

[0107] There are many ways to fix the insulating seat 181 on the stator bracket 11. For example, the insulating seat 181 can be installed on the stator bracket 11 by interference fit; or, the insulating seat 181 can be fixed on the stator bracket 11 by bonding; or, the insulating seat 181 can be fixed on the stator bracket 11 by fasteners.

[0108] There are many ways to fix the conductive member 182 on the insulating seat 181. For example, the conductive member 182 can be installed on the insulating seat 181 by interference fit; or, the conductive member 182 can be fixed on the insulating seat 181 by bonding; or, the conductive member 182 can be fixed on the insulating seat 181 by fasteners.

[0109] Optionally, the insulating seat 181 and the conductive member 182 are both cylindrical structures, the insulating seat 181 has a cylindrical cavity, and the conductive member 182 is installed in the cylindrical cavity. For example, the insulating seat 181 and the conductive member 182 are both cylindrical structures.

[0110] The conductive member 182 is provided with a second connection groove 1821 . Optionally, the neutral current collector 17 is installed in the second connection groove 1821 to facilitate the fixation of the neutral current collector 17 .

[0111] The neutral end 122 of the stator winding 12 is connected in the second connection groove 1821 . On the one hand, the high temperature during welding will not have a significant impact on the insulating seat 181 ; on the other hand, it is conducive to the welding and fixing of the neutral end 122 .

[0112] In some embodiments, the stator winding 12 and the stator bracket 11 are first assembled together, and after the wiring is completed, the thermal conductive glue is poured, and after the thermal conductive glue is cured, the stator winding 12 and the stator bracket 11 are combined into a stator assembly 10. With this design, the stator assembly 10 has high strength and better reliability. Among them, the thermal conductive glue is cured to form a glue injection part 19.

[0113] Please also refer to Figure 1 , Figure 2 and Figure 3 The second aspect of the present application provides a hub motor 100. The hub motor 100 includes a housing 20, a stator shaft 40, a rotor assembly 30, and the stator assembly 10 as described in the first aspect, wherein the housing 20 is rotatably mounted on the stator shaft 40, the rotor assembly 30 is fixed in the housing 20, and the stator assembly 10 is in the housing 20 and fixed on the stator shaft 40.

[0114] Optionally, the housing 20 includes two half shells fixed together, and the rotor assembly 30 and the stator assembly 10 are both in the cavity surrounded by the two half shells. It can be understood that one of the two half shells can be fixedly connected to the rim 200; or, both half shells can be fixedly connected to the rim 200. Through the above design, the rim 200 omits the central spoke plate, effectively reducing the thickness of the hub motor 100.

[0115] Optionally, the housing 20 is rotatably mounted on the stator shaft 40 via a bearing, and the stator shaft 40 is mounted on the horn of the vehicle body via a fixing seat.

[0116] The rotor assembly 30 is fixed in the housing 20. It can be understood that the rotor assembly 30 can be set in one group. In this case, the rotor assembly 30 can be located on one side of the stator assembly 10 in the axial direction of the stator bracket 11, or on one side of the stator assembly 10 in the radial direction of the stator bracket 11; or, the rotor assembly 30 can be set in two groups, and the two groups of rotor assemblies 30 are respectively located on both sides of the stator assembly 10 in the axial direction of the stator bracket 11. In this case, the hub motor 100 is a dual-rotor disc motor.

[0117] Please also refer to Figure 2 and Figure 3 In some embodiments, a connecting channel 72 connecting the two sides of the stator bracket 11 is provided on the stator bracket 11 and the stator shaft 40 of the stator assembly 10; the hub motor 100 also includes a fluid inlet pipe 70 and a fluid return pipe 80 passing through the stator shaft 40, the fluid inlet pipe 70 is connected to one side of the stator bracket 11 in its axial direction through the connecting channel 72, and the fluid return pipe 80 is connected to the other side of the stator bracket 11 in its axial direction.

[0118] The connecting channel 72 includes a first section 721 disposed on the stator support 11 and a second section 722 disposed on the stator shaft 40 .

[0119] The stator shaft 40 is a hollow structure, and a through hole 41 extending radially is provided on the stator shaft 40. The fluid inlet pipe 70 and the fluid return pipe 80 pass through the through hole 41 from the inside of the stator shaft 40 to the outside of the stator shaft 40. Therefore, a sealing structure is designed at the through hole 41 to prevent the fluid from flowing out. The fluid can be liquid or gas.

[0120] The end of the fluid inlet pipe 70 is connected to a pipeline joint 71 , and the fluid inlet pipe 70 is connected to the connecting channel 72 via the pipeline joint 71 .

[0121] During cooling, the fluid flows from the fluid inlet pipe 70 through the pipe joint 71 and the connecting channel 72 into the axial side of the stator support 11 (such as Figure 2 The left side of the stator support 11), and then flows into the other axial side of the stator support 11 (such as Figure 2 In this process, since the fluid is in direct contact with the stator assembly 10, the stator assembly 10 can be sufficiently cooled.

[0122] In other embodiments, a notch is provided on the stator shaft 40, in which case the second section 722 is not provided on the stator shaft 40, and only the first section 721 is provided on the stator bracket 11, the first section 721 constitutes a connecting channel 72, and the pipe connector 71 passes through the notch and is connected to the first section 721; or, a notch is provided on the stator bracket 11, in which case the first section 721 is not provided on the stator bracket 11, and only the second section 722 is provided on the stator shaft 40, the second section 722 constitutes a connecting channel 72, and the pipe connector 71 is connected to the second section 722.

[0123] In other embodiments, the fluid inlet pipe 70 is connected to one side of the stator support 11 in the axial direction, and the fluid return pipe 80 is connected to the other side of the stator support 11 in the axial direction through the connecting channel 72 .

[0124] In some embodiments, a rotary transformer 50 is disposed in the hollow cavity of the stator shaft 40 . Since the hollow cavity of the stator shaft 40 is separated from the stator winding 12 , current interference can be effectively avoided.

[0125] Optionally, the housing 20 further includes a small cover plate 21, the rotor of the rotary transformer 50 is fixed on the inner side of the small cover plate 21, and the stator of the rotary transformer 50 is fixed on the cavity wall of the hollow cavity of the stator shaft 40. The small cover plate 21 rotates with the housing 20, driving the rotor of the rotary transformer 50 to rotate synchronously, thereby realizing the detection of the operating state of the hub motor 100 by the rotary transformer 50.

[0126] In some embodiments, the hub motor 100 further includes a brake disc 60 , which is sleeved on the stator shaft 40 and connected to the housing 20 , and a sealing structure is provided at the connection between the brake disc 60 and the stator shaft 40 .

[0127] The brake disc 60 is sleeved on the stator shaft 40 and connected to the housing 20, that is, the brake disc 60 can rotate relative to the stator shaft 40. Therefore, there should be a corresponding gap at the connection between the brake disc 60 and the stator shaft 40 to meet the relative rotation of the two. Then, in order to improve the waterproof performance of the hub motor 100, a sealing structure, such as an oil seal sealing structure, is provided at the connection between the brake disc 60 and the stator shaft 40.

[0128] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A stator assembly, characterized in that: It includes a stator support, a plurality of stator windings and a same-phase busbar, wherein the plurality of stator windings are arranged on the stator support at intervals along the circumferential direction of the stator support; the same-phase busbar is arranged on one axial side of the stator support, and the same-phase busbar is insulated from the stator support; the lead ends of the same-phase stator windings in the plurality of stator windings are connected to the same-phase busbar, and the same-phase busbar is provided with a wiring portion for connecting to a wiring harness.

2. The stator assembly according to claim 1, characterized in that: The same-phase busbars extend along the circumferential direction of the stator support.

3. The stator assembly according to claim 2, characterized in that: The stator assembly further comprises an insulating member arranged on one axial side of the stator support, the insulating member extends along the circumferential direction of the stator support, and the in-phase busbar is arranged on the insulating member.

4. The stator assembly according to claim 3, characterized in that: A mounting groove is provided on a side surface of the insulating member facing away from the stator bracket, and the same-phase busbar is placed in the mounting groove.

5. The stator assembly according to any one of claims 1 to 4, characterized in that: The plurality of stator windings are divided into multi-phase stator windings, and each phase of the stator winding is correspondingly connected to one of the same-phase busbars.

6. The stator assembly according to claim 4, characterized in that: The stator assembly further includes a connection block, which is located in the mounting groove and connected to the same-phase busbar.

7. The stator assembly according to claim 6, characterized in that: The connection block is provided with a first connection groove, and the lead end of the stator winding is connected in the first connection groove.

8. The stator assembly according to any one of claims 1 to 4, characterized in that: The connection part is a connection post, and the connection ends of the same-phase busbar and the connection post are respectively located on two axial sides of the stator bracket.

9. The stator assembly according to claim 8, characterized in that: The stator assembly further comprises a neutral current collector, to which the neutral end of the stator winding is connected; the neutral current collector and the terminal of the terminal post are located on the same side of the stator bracket.

10. The stator assembly according to claim 9, characterized in that: The stator assembly also includes an insulating seat fixed on the stator bracket and a conductive member fixed on the insulating seat; the neutral current collector is installed on the conductive member, a second connecting groove is provided on the conductive member, and the neutral end of the stator winding is connected to the second connecting groove.

11. A hub motor, characterized in that: It comprises a housing, a stator shaft, a rotor assembly and the stator assembly as claimed in any one of claims 1 to 10, wherein the housing is rotatably mounted on the stator shaft, the rotor assembly is fixed in the housing, and the stator assembly is in the housing and fixed on the stator shaft.

12. The wheel hub motor according to claim 11, characterized in that: The stator support and / or the stator shaft of the stator assembly are provided with a connecting channel connecting the two sides of the stator support; the hub motor also includes a fluid inlet pipe and a fluid return pipe passing through the stator shaft, one of the fluid inlet pipe and the fluid return pipe is connected to one side of the stator support in the axial direction through the connecting channel, and the other of the fluid inlet pipe and the fluid return pipe is connected to the other side of the stator support in the axial direction.

Images