CN217545692U - Stator structure and in-wheel motor - Google Patents

Abstract

The utility model relates to the technical field of motors, and provides a stator structure and an in-wheel motor, wherein the stator structure comprises a plurality of independently arranged winding units, a stator frame and a connecting assembly, and each winding unit comprises a stator core and a coil wound on the stator core; the stator frame is provided with a plurality of accommodating grooves, each accommodating groove is circumferentially distributed by taking the central axis of the stator frame as the center, and the stator core and the coil are arranged in the corresponding accommodating groove; the coils on the stator cores are connected through the connecting component so as to realize the electrical connection among the winding units. The utility model provides a stator structure provides sufficient accommodation space for the winding unit to, each winding unit can accomplish to arrange in the storage tank after locating on the stator core at the coil again, thereby simplifies the winding of coil and establishes the complexity, and simultaneously, each winding unit connects through extra coupling assembling, satisfies stator structure's normal work needs.

Description

Stator structure and in-wheel motor

Technical Field

The utility model relates to the technical field of electric machine, especially, provide a stator structure and have this stator structure's in-wheel motor.

Background

The base of the conventional motor winding is an iron core formed by laminating an integrated silicon steel sheet punching groove, and all winding coils are wound on the iron core. Because the space of the laminated iron core of the integral silicon steel sheet punching groove is limited, the winding coil is more difficult in the winding process, and the winding difficulty is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stator structure aims at solving the problem that current stator structure is unfavorable for the winding coil coiling.

In order to achieve the above object, the utility model adopts the following technical scheme:

in a first aspect, the present invention provides a stator structure, including:

the winding unit comprises a stator core and a coil wound on the stator core;

the stator frame is provided with a plurality of accommodating grooves, the accommodating grooves are circumferentially distributed by taking the central axis of the stator frame as the center, and the stator core and the coil are arranged in the corresponding accommodating grooves;

and the coils on the stator cores are connected through the connecting assembly so as to realize the electrical connection among the winding units.

The utility model has the advantages that: the utility model provides a stator structure does the independence with each winding unit and sets up. Specifically, each winding unit includes a stator core and a coil wound on the stator core, and the coils between the independent winding units are not directly connected. In order to limit each winding unit, a plurality of accommodating grooves are formed in the stator frame, and each winding unit is arranged in the corresponding accommodating groove. Simultaneously, for realizing supplying power to each winding unit in unison, coupling assembling connects the coil of each winding unit to connect and form the same looks, and, connect through coupling assembling again between each the same looks, thereby realize switching on in proper order between each looks. The utility model provides a stator structure provides sufficient accommodation space for the winding unit to, each winding unit can arrange in the storage tank after the coiling is accomplished again, thereby simplifies the winding of coil and establishes the complexity, and simultaneously, each winding unit connects through extra coupling assembling, satisfies stator structure's normal work needs.

In one embodiment, the stator frame has a first end face and a second end face opposite to the first end face, each of the accommodating grooves is formed by inward recessing of the first end face or the second end face, and the connecting assembly is located on one side of the end face opposite to the accommodating groove.

In one embodiment, a plurality of adjacent winding units are connected to form a stator group, and the connecting assembly includes a first connector for connecting the coils on two adjacent stator cores in the same stator group, a second connector for connecting the coils on the stator cores of a plurality of stator groups in the same phase, and a third connector for connecting with an external cable.

In one embodiment, at least one of the first connector, the second connector, and the third connector is a sheet;

or the first connecting piece, the second connecting piece and the third connecting piece are all wires.

In one embodiment, the stator structure further includes a cover plate, and the cover plate is disposed on the stator frame and sealed in each of the receiving slots.

In one embodiment, the cover plate is fixedly connected with the stator frame through screws.

In one embodiment, the coil is a flat coil with a square cross section along the thickness direction of the coil, and the flat coil is wound on the stator core along the cross section direction of the flat coil.

In one embodiment, the stator core comprises a plurality of magnetic steel sheets which are stacked, and a notch structure for the coil to wind is formed in each magnetic steel sheet.

In one embodiment, the stator structure further includes a colloid filled in a gap between an outer surface of the coil and an inner wall of the accommodating groove.

In a second aspect, the present invention also provides an in-wheel motor, which comprises an outer rotor, an inner rotor and a stator structure, wherein the outer rotor, the inner rotor and the stator structure are concentrically arranged.

The utility model has the advantages that: the utility model provides an in-wheel motor, on having above-mentioned stator structure basis, manufacturing process is more simple, and production efficiency is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an exploded view of a stator structure according to an embodiment of the present invention;

fig. 2 is a front view of a stator structure provided by an embodiment of the present invention;

fig. 3 is a top view of a winding unit of a stator structure according to an embodiment of the present invention;

fig. 4 is a front view of a magnetic steel sheet of a stator structure provided by an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a winding unit of a stator structure according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram illustrating that the winding units of the stator structure provided by the embodiment of the present invention are connected by the connection assembly;

fig. 7 is an exploded view of the in-wheel motor provided by the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

100. a stator structure;

10. a winding unit; 11. a stator core; 12. a coil; 111. a magnetic steel sheet; 11a, a notch structure; 101. a stator group;

20. a stator frame; 20a, a containing groove; 20b, a first end surface; 20c, a second end face;

30. a connection assembly; 31. a first connecting member; 32. a second connecting member; 33. a third connecting member;

40. a cover plate;

200. outer rotor, 300, inner rotor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 3 and 6, in a first aspect, the present invention provides a stator structure 100 including a plurality of winding units 10 independently arranged, a stator frame 20 and a connecting assembly 30. Here, the winding units 10 disposed independently of each other may be understood that each winding unit 10 is independent in structure and in electrical connection, thereby satisfying the requirements of independent manufacture and independent assembly. The stator frame 20 serves to support and restrain the winding units 10, and the connection assembly 30 serves to electrically connect the winding units 10.

Specifically, the winding unit 10 includes a stator core 11 and a coil 12 wound on the stator core 11. It is understood that the stator cores 11 are also independent from each other, and the coil 12 of each winding unit 10 is also wound on the corresponding stator core 11 only in an electrical relationship without connection with the coils 12 of other winding units 10, so that each winding unit 10 can be wound independently without limitation of space and material, and the winding process is also easier to implement. It should be noted that, in an actual manufacturing process, the coil 12 of the winding unit 10 may be wound and shaped first and then sleeved into the stator core 11, or may be directly wound on the stator core 11.

The stator frame 20 is provided with a plurality of receiving slots 20a, each receiving slot 20a is circumferentially distributed around a central axis of the stator frame 20, and the stator core 11 and the coil 12 are disposed in the corresponding receiving slot 20a. It can be understood that, under the limiting action of each accommodating groove 20a, each winding unit 10 is arranged on the stator frame 20 in an annular structure.

The coils 12 of the stator cores 11 are connected by the connection assembly 30 to electrically connect the winding units 10.

In the present application, the winding units 10 to which the same power source supplies power at the same time are of the same phase.

Illustratively, a plurality of adjacent winding units 10 are connected to form a stator group 101, and the connecting assembly 30 is used for connecting the coils 12 of the adjacent winding units 10, so that the adjacent winding units 10 form the stator group 101, that is, in the same stator group 101, the adjacent winding units 10 are connected by the connecting assembly 30; when the stator structure 100 includes a plurality of stator groups 101 of the same phase, the connecting assembly 30 is configured to electrically connect the plurality of stator groups 101 of the same phase, so as to satisfy the connection of all the winding units 10 in the same phase; the connection assembly 30 may also be used to electrically connect each phase winding unit 10 with an external cable, thereby alternately supplying power to each phase. Here, "connection" may be in series or in parallel. For example, the winding units of the same stator group 101 may be connected in series, may be connected in parallel, or may be connected in series or in parallel; the stator groups 101 may be connected in series, may be connected in parallel, or may be connected in series or in parallel. Here, the connection mode is not limited to the series connection and the parallel connection.

For example, the connecting assembly 30 may have a structure similar to a wire, and the wire structure may be a flexible wire, a hard wire, a round wire, or a flat wire, which is not limited herein. Since the lead structure is more easily deformed, the lead structure can be flexibly arranged and bent according to the internal structure of the stator structure 100 in the process of connecting the winding units 10; and the wire structure has the characteristic of being bendable and deformable, so that the requirement on the installation tolerance of the coil 12 on the stator frame 20 is lower in the process of connecting the wire structure with the coil 12, the wire structure is more easily connected with the coil 12 and is not easy to fall off.

For example, the connecting assembly 30 may also be a connecting plate-like structure, and the connecting plate has the characteristics of high structural strength, low ductility and deformation, and can improve the structural strength of the stator structure 100 and reduce the space occupied by the connecting assembly 30.

The stator structure 100 of the present application provides enough accommodation space for the winding units 10, and each winding unit 10 can be disposed in the accommodation groove 20a after the coil 12 is wound around the stator core 11, thereby simplifying the winding complexity of the coil 12, and meanwhile, each winding unit 10 is connected by the additional connection assembly 30 to meet the working requirement of the stator structure 100.

Referring to fig. 1, in an embodiment, the stator frame 20 has a first end surface 20b and a second end surface 20c opposite to the first end surface 20b, each receiving groove 20a is formed by the first end surface 20b or the second end surface 20c being recessed inward, and the connecting assembly 30 is disposed on an end surface opposite to the receiving groove 20a. It is understood that each winding unit 10 is inserted into the corresponding receiving slot 20a along the axial direction of the stator frame 20, that is, each winding unit 10 can be inserted into the receiving slot 20a from the first end surface 20b or the second end surface 20c of the stator frame 20, and the connecting assembly 30 is located at one side of the end surface opposite to the receiving slot 20a. Of course, in order to facilitate the connection between the connection assembly 30 and the coil 12 of each winding unit 10, a mounting hole communicating with the receiving slot 20a may be formed on the end surface of the stator frame 20, an end portion of the coil 12 penetrates through the mounting hole, and the connection assembly 30 is connected to an end portion of the coil 12 extending out of the mounting hole.

Referring to fig. 2 and 6, in one embodiment, a plurality of adjacent winding units 10 are connected to form a stator group 101, and the connection assembly 30 includes a first connection member 31 for connecting the coils 12 on two adjacent stator cores 11, a second connection member 32 for connecting the coils 12 on the stator cores 11 in a plurality of stator groups 101 of the same phase, and a third connection member 33 for connecting with an external cable. It can be understood that the stator group 101 is formed by connecting a plurality of adjacent winding units 10, and therefore, the first connecting member 31 is used for connecting the coils 12 of the adjacent winding units 10 to form the stator group 101, that is, the coils 12 of the adjacent winding units 10 in the same stator group 101 are connected by the first connecting member 31. Because each stator group 101 is arranged on the stator frame 20 in a surrounding manner, and the stator groups 101 in each same phase are uniformly spaced on the stator frame 20, the stator groups 101 in each same phase need to be connected across the winding units 10 by using the second connecting member 32, so that all the winding units 10 in the same phase are connected, and finally, each connected stator group 101 needs to be connected with an external cable to sequentially energize each phase, so that one end of the stator group needs to be connected with all the winding units 10 in the current same phase by using the third connecting member 33, and the other end of the stator group is connected with the external cable.

Referring to fig. 2, in one embodiment, at least one of the first connecting member 31, the second connecting member 32 and the third connecting member 33 is a sheet body. It can be understood that, since each connecting member of the connecting assembly 30 is disposed on the first end surface 20b or the second end surface 20c of the stator frame 20, in order to save space, at least one of the first connecting member 31, the second connecting member 32, and the third connecting member 33 may be fabricated to be a sheet body, that is, the sheet body may be attached to the end surface of the stator frame 20 when being connected to the coil 12 of the corresponding winding unit 10, so that the overall thickness of the stator structure 100 may be thinner in the thickness direction, and the overall strength of the stator structure 100 may be improved due to the higher structural strength of the sheet body.

Illustratively, as shown in fig. 2, the first connecting member 31, the second connecting member 32 and the third connecting member 33 are all sheet bodies, and each sheet body is in a strip shape, that is, each sheet body directly connects the coil 12 of one winding unit 10 and the coil 12 of another winding unit 10, which is more material-saving. Of course, since the winding units 10 are disposed on the stator frame 20 in a surrounding manner, and the sheets are spatially staggered, in order to avoid the occurrence of short circuit, an insulating layer may be coated on the outer surface of each sheet, or a separator may be disposed at the staggered position of the sheets.

Alternatively, in other embodiments, at least one of the first connecting member 31, the second connecting member 32 and the third connecting member 33 is a wire, and it is understood that the wire has a structural advantage of being bent, so that the overall length of the wire can be reduced in terms of spatial arrangement, and thus the overall weight of the stator structure 100 can be reduced.

Or, in other embodiments, one part of the first connecting member 31, the second connecting member 32 and the third connecting member 33 is a sheet body, and the other part is a wire. This kind of mode of laying has combined the advantage of two kinds of structures of lamellar body and wire, promptly, installs the lamellar body in the position department that needs reduce thickness, and shortens length, reduces the crisscross position department installation wire in space in needs.

Referring to fig. 1, in an embodiment, the stator structure 100 further includes a cover plate 40, and the cover plate 40 is disposed on the stator frame 20 and seals each receiving groove 20a. It can be understood that the cover plate 40 can prevent each winding unit 10 from sliding from the corresponding accommodating slot 20a, and thus, functions as a sealing. For example, a first threaded hole is formed in the cover plate 40, a second threaded hole is formed in the end surface of the stator frame 20, and the first threaded hole and the second threaded hole are sequentially penetrated by screws to achieve connection. Of course, in other embodiments, a snap structure may be used to connect the two.

Referring to fig. 3 and 5, in one embodiment, the coil 12 is a flat coil having a square cross section along its thickness direction, and the flat coil is wound around the stator core 11 along its cross section. Here, the flat coil is attached more closely to the outer wall of the stator core 11, and the wire is also attached more closely to the wire, so that it is possible to avoid the problem that the remaining gap between the wires is large due to the circular-section coil 12, and the effective wire area in the accommodating groove 20a is small. Thus, the overload current capacity of the stator structure 100 is increased, and the power of the motor is higher under the same wire body volume.

For example, as shown in fig. 6, the flat coils are wound layer by layer in the height direction of the stator core 11, and both ends of the flat coil are located on the same side of the stator core 11, so that each winding unit 10 is fixed in the accommodating slot 20a of the stator frame 20, and both ends of the flat coil of each winding unit 10 face the same side of the stator frame 20, so that both ends of the flat coils of several winding units 10 in the same stator group 101 are connected by the first connecting piece 31 in the connecting assembly 30, thereby implementing series connection of each winding unit 10, and at the same time, each stator group 101 in the same phase is connected by the second connecting piece 32 in the connecting assembly 30, specifically, one end of the flat coil of the winding unit 10 arranged outside in the same stator group 101 is connected to one end of the flat coil of the winding unit 10 arranged outside in another stator group 101 by the second connecting piece 32, that is, thereby implementing series connection of each stator group 101 in the same phase; finally, each stator group 101 in the same phase is connected and electrified with an external cable by using the second connecting piece in the connecting assembly 30, specifically, one end of the flat coil of the winding unit 10 arranged outside in the two stator groups 101 at the head and the tail in the same phase is connected with one third connecting piece 33, and the two third connecting pieces 33 are connected with the positive end and the negative end of the external cable respectively.

Referring to fig. 3, in one embodiment, the stator core 11 includes a plurality of magnetic steel sheets 111 stacked one on another. Here, each magnetic steel sheet 111 is also independently provided, and the magnetic steel sheets 111 are laminated to form the stator core 11. For example, the shape of the magnetic steel sheets 111 along the cross-sectional direction is "I" shape, so that the stator core 11 formed by combining the magnetic steel sheets 111 has a block structure, and is conveniently placed in the receiving groove 20a of the stator frame 20.

Referring to fig. 4, in one embodiment, the magnetic steel sheet 111 is formed with a notch 11a for winding the coil 12. It can be understood that the positions and shapes of the notch structures 11a of the magnetic steel sheets 111 are the same, and when the magnetic steel sheets 111 are stacked to form the stator core 11, the positions corresponding to the notch structures 11a of the magnetic steel sheets 111 form a groove on the stator core 11, and the groove facilitates the winding of the coil 12, so as to achieve the purpose of preventing the coil from falling off.

In one embodiment, the stator structure 100 further includes a colloid, and the colloid is filled in a gap between the outer surface of the coil 12 and the inner wall of the receiving groove 20a. It can be understood that, in order to enable the winding units 10 to be placed in the receiving slots 20a of the stator frame 20, a certain gap is necessarily formed between the coils 12 outside the winding units and the inner walls of the receiving slots 20a, and therefore, in order to ensure the installation stability of each winding unit 10 in the receiving slots 20a, the receiving slots 20a may be filled with a glue to close the gap.

Referring to fig. 7, in a second aspect, the present invention further provides a hub motor, which includes an outer rotor 200, an inner rotor 300 and the above stator structure 100, the stator structure 100 is disposed between the outer rotor 200 and the inner rotor 300.

The utility model provides an in-wheel motor, on having above-mentioned stator structure 100 basis, manufacturing process is more simple, and production efficiency is higher.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A stator structure, comprising:

the winding unit comprises a stator core and a coil wound on the stator core;

the stator comprises a stator frame, a stator core and a coil, wherein the stator frame is provided with a plurality of accommodating grooves, the accommodating grooves are circumferentially distributed by taking a central axis of the stator frame as a center, and the stator core and the coil are arranged in the corresponding accommodating grooves;

and the coils on the stator cores are connected through the connecting components so as to realize the electrical connection among the winding units.

2. The stator structure according to claim 1, characterized in that: the stator frame is provided with a first end face and a second end face opposite to the first end face, each accommodating groove is formed by inwards sinking the first end face or the second end face, and the connecting assembly is located on one side of the end face opposite to the accommodating groove.

3. The stator structure according to claim 2, characterized in that: the winding units which are adjacent are connected to form a stator group, and the connecting assembly comprises a first connecting piece used for connecting the coils on the stator cores of two adjacent stator groups in the same stator group, a second connecting piece used for connecting the coils on the stator cores of the stator groups in the same phase, and a third connecting piece used for being connected with an external cable.

4. A stator structure according to claim 3, characterized in that: at least one of the first connecting piece, the second connecting piece and the third connecting piece is a sheet body;

or the first connecting piece, the second connecting piece and the third connecting piece are all wires.

5. The stator structure according to claim 1, characterized in that: the stator structure further comprises a cover plate, and the cover plate is covered on the stator frame and plugged in each accommodating groove.

6. The stator structure of claim 5, wherein: the cover plate is fixedly connected with the stator frame through screws.

7. The stator structure according to claim 1, characterized in that: the coil is a flat coil with a square cross section along the thickness direction of the coil, and the flat coil is wound on the stator core along the cross section direction of the flat coil.

8. The stator structure according to claim 1, characterized in that: the stator core comprises a plurality of magnetic steel sheets which are stacked mutually, and a gap structure for winding the coil is formed in each magnetic steel sheet.

9. The stator structure according to claim 1, characterized in that: the stator structure further comprises colloid, and the colloid is filled in a gap between the outer surface of the coil and the inner wall of the accommodating groove.

10. The utility model provides an in-wheel motor, includes outer rotor and the inner rotor of concentric setting, its characterized in that: further comprising a stator structure according to any one of claims 1 to 9, the stator structure being provided between the outer rotor and the inner rotor.

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