Wheel hub flat wire motor stator structure

Abstract

The utility model discloses a stator structure of a hub flat wire motor, which relates to the technical field of motor parts for electric vehicles and comprises a hub flat wire motor and a stator support mounted in the hub flat wire motor, the stator support is of a circular ring structure, a plurality of teeth are arranged on the outer wall of the stator support, and the teeth are arranged on the outer wall of the stator support. A rectangular embedding groove is arranged between two adjacent teeth, one end of the stator support is provided with an iron core baffle plate, and the iron core baffle plate is of a wafer structure. The semi-circular inserts and the semi-circular insert grooves on the iron core group sheets are respectively and firmly connected with the semi-circular insert grooves and the semi-circular inserts on the adjacent iron core group sheets; the rectangular insert of the iron core assembly sheet is embedded in the rectangular embedding groove of the stator support, and then the stator iron core with the winding and the stator support are fixed together through a pin. The flat wire winding is directly wound on the iron core group sheets, so that the slot fullness rate and the winding rigidity can be improved, the winding loss is reduced, the explosive power of the motor is improved, and the vibration noise of the motor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor components for electric vehicles, in particular to a hub flat wire motor stator structure. Background Art

[0002] With the widespread adoption of electric vehicles and the continuous improvement of relevant national regulations, there is a growing demand for power that is more energy-efficient, has higher power density, is lightweight, and features intelligent technology. Currently, the industry's common practice is to use circular in-wheel motors, which have low slot fill rates, poor overload capacity, and high temperature rise, making them unable to meet the power needs of future electric vehicles. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a stator structure for a hub flat wire motor to solve the technical problems of low slot fill rate and low efficiency of round wire hub motors, which cannot meet the needs of future high-performance electric vehicles.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A stator structure for a hub flat wire motor includes a hub flat wire motor and a stator bracket installed in the hub flat wire motor. The stator bracket is configured as a circular ring structure. The outer wall of the stator bracket is provided with a plurality of teeth, and a rectangular inlay groove is provided between two adjacent teeth. One end of the stator bracket is provided with an iron core baffle. The iron core baffle is a circular disc structure. The surface of the iron core baffle is provided with a plurality of pin holes, and each pin hole provided on the surface of the iron core baffle corresponds to the rectangular inlay groove.

[0006] A cylinder with a through-hole structure is provided in the middle of the stator bracket, and a plurality of connecting ribs are provided to support and fix the cylinder in the middle of the stator bracket and the inner wall of the stator bracket.

[0007] As a preferred technical solution of the present invention, a plurality of stator cores are installed on the surface of the core baffle, and each of the stator cores is assembled from 3N core assemblies, that is, the hub flat wire motor adopts concentrated winding. The hub flat wire motor has several teeth, and the stator core is composed of several core assemblies connected together, and the outer wall of the core assembly is wound with a flat wire winding.

[0008] As a preferred technical solution of the present invention, each of the core segments is provided with a semicircular inlay groove and a semicircular insert, a dovetail inlay groove and a dovetail insert, a rectangular insert and an insert pin hole; the semicircular inlay grooves and semicircular inserts on adjacent core segments are interlocked with each other, and the dovetail inlay grooves and dovetail inserts on adjacent core segments are interlocked with each other, so that the core segments are firmly combined together.

[0009] As a preferred technical solution of the present invention, the stator bracket is provided with a fixing pin, an iron core baffle, an insert pin hole, a rectangular insert groove, and a keyway structure; the rectangular insert on the iron core assembly is snapped into the rectangular insert groove, and the fixing pin passes through the insert pin hole and the insert pin hole to fix the iron core assembly to the stator bracket.

[0010] As a preferred technical solution of the present invention, a keyway is provided on the inner wall of the cylinder in the middle of the stator bracket.

[0011] As a preferred technical solution of the present invention, slot insulation is provided on the surface of the core assembly.

[0012] The utility model includes an assembled stator core, flat wire windings, slot insulation, a stator bracket, and fixing pins. The stator core is assembled from 3N core segments, each of which has semicircular slots and semicircular inserts, as well as dovetail slots and dovetail inserts. The semicircular inserts and semicircular slots on a core segment are securely connected to the semicircular slots and semicircular inserts on adjacent core segments. The rectangular inserts of the core segments are inserted into the rectangular slots of the stator bracket, and then the stator core with windings is fixed to the stator bracket with pins. Winding the flat wire windings directly onto the core segments improves the slot fill rate and winding stiffness, thereby reducing winding losses, enhancing motor power, and reducing motor vibration and noise.

[0013] This utility model utilizes flat wire windings directly around the core assemblies. Several core assemblies with windings are then connected via slots and inserts to form the stator core with windings. Lead wires are welded together according to the corresponding motor slot-pole pattern. Directly winding the flat wire around the core assemblies ensures close contact with the core, increasing slot fill factor and winding stiffness, thereby improving motor performance. This utility model utilizes a flat wire hub motor stator structure, which increases the motor's slot fill factor and reduces electrical density, thereby enhancing the motor's overload capacity, reducing temperature rise, and increasing the explosive power of the electric vehicle.

[0014] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the stator bracket of the utility model;

[0016] Figure 2 This is a schematic diagram of the stator core structure of the utility model, which is assembled from 3N core segments;

[0017] Figure 3This is a schematic diagram of the structure of the flat wire winding of the utility model wound on the stator core;

[0018] Figure 4 This is a schematic diagram of the structure of the surface slot insulation of the core assembly of the utility model;

[0019] Figure 5 This is a schematic structural diagram of the iron core assembly of the utility model;

[0020] In the figure: 1. stator core; 2. flat wire winding; 3. slot insulation; 4. stator bracket; 5. fixing pin; 6. core assembly; 7. semicircular inlay slot; 9. insert; 8. dovetail inlay slot; 10. insert; 11. rectangular insert; 12. insert pin hole; 13. core baffle; 14. pin hole; 15. rectangular inlay slot; 16. keyway; 17. connecting rib. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the above description of the present invention, it should be noted that the terms "one side" and "the other side" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted. Example

[0026] See also Figure 1-5 , which is a technical solution provided by the utility model: a stator structure of a hub flat wire motor, including a hub flat wire motor and a stator bracket 4 installed in the hub flat wire motor, the stator bracket 4 is arranged as a circular ring structure, the outer wall of the stator bracket 4 is provided with a plurality of teeth, and a rectangular inlay groove 15 is provided between two adjacent teeth, and one end of the stator bracket 4 is provided with an iron core baffle 13, the iron core baffle 13 is a disc structure, and a plurality of pin holes 14 are opened on the surface of the iron core baffle 13, and each pin hole 14 opened on the surface of the iron core baffle 13 corresponds to the rectangular inlay groove 15.

[0027] A cylinder with a through-hole structure is provided in the middle of the stator bracket 4 , and a plurality of connecting ribs 17 are provided between the cylinder in the middle of the stator bracket 4 and the inner wall of the stator bracket 4 for support and fixation.

[0028] Several stator cores 1 are mounted on the surface of the core baffle 13. Each stator core 1 is assembled from 3N core assemblies 6. This means that the hub flat wire motor utilizes concentrated windings. For every number of teeth in the hub flat wire motor, the stator core 1 is composed of several core assemblies 6 connected together. Flat wire windings 2 are wrapped around the outer walls of the core assemblies 6. These flat wire windings 2 are wound directly onto the core assemblies 6. Several core assemblies 6 with windings are then connected together via slots and inserts to form the stator core 1 with windings. Lead wires are welded together according to the corresponding motor slot-pole pattern. Winding the flat wire directly onto the core assemblies 6 ensures a close fit between the core, increasing the slot fill rate and winding stiffness, thereby improving motor performance.

[0029] Each core assembly 6 is provided with a semicircular inlay groove 7 and a semicircular insert 9, a dovetail inlay groove 8 and a dovetail insert 10, a rectangular insert 11 and an insert pin hole 12; the semicircular inlay grooves 7 and the semicircular insert 9 on adjacent core assemblies 6 are interlocked with each other, and the dovetail inlay grooves 8 and the dovetail insert 10 on adjacent core assemblies 6 are interlocked with each other, so that the core assemblies 6 are firmly combined together.

[0030] The stator bracket 4 is provided with a fixing pin 5, a core baffle 13, a pin hole 14, a rectangular insert groove 15, and a keyway 16 structure; the rectangular insert 11 on the core assembly 6 is snapped into the rectangular insert groove 15, and the fixing pin 5 passes through the pin hole 14 and the insert pin hole 12 to fix the core assembly 6 to the stator bracket 4.

[0031] A keyway 16 is provided on the inner wall of the cylinder in the middle of the stator bracket 4 .

[0032] Slot insulation 3 is provided on the surface of the core assembly 6 .

[0033] The stator core 1 comprises an assembled stator core 1, flat wire windings 2, slot insulation 3, a stator support 4, and fixing pins 5. The stator core 1 is assembled from 3N core segments 6. The core segments 6 have semicircular slots and inserts, as well as dovetail slots and inserts. The inserts and slots on one core segment 6 are securely connected to the slots and inserts on adjacent core segments 6. Rectangular inserts 11 in each core segment 6 are inserted into rectangular slots 15 in the stator support 4. Pins are then used to secure the stator core 1 with the windings to the stator support 4. The flat wire windings 2 are wound directly onto the core segments 6, increasing the slot fill rate and winding stiffness, thereby reducing winding losses, lowering motor temperature rise, increasing motor power, and reducing vibration and noise.

[0034] Preferably, the stator core 1 has an outer diameter of 100-400 mm and an inner diameter of 50-350 mm.

[0035] Preferably, the core assembly 6 has 1-3 semicircular or dovetail slot inserts and slots.

[0036] Preferably, the stator core 1 adopts parallel slots to increase the slot fill rate.

[0037] Preferably, the stator core 1 is in the form of a split lobed structure with open slots, semi-closed slots or closed slots. The winding is directly wound on the core teeth or inserted on the core teeth after the winding is formed, so that the winding is in close contact with the core teeth.

[0038] Preferably, the core assembly 6 has a rectangular insert 11 structure, which is fixed with the rectangular insert groove 15 of the stator bracket 4 and can withstand a large torsional and vibration use environment.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A hub flat wire motor stator structure, characterized by: The invention comprises a hub flat wire motor and a stator bracket (4) installed in the hub flat wire motor, wherein the stator bracket (4) is arranged as a circular ring structure, the outer wall of the stator bracket (4) is provided with a plurality of teeth, and a rectangular inlay groove (15) is provided between two adjacent teeth, and one end of the stator bracket (4) is provided with an iron core baffle (13), the iron core baffle (13) is a disc structure, and the surface of the iron core baffle (13) is provided with a plurality of pin holes (14), and each pin hole (14) provided on the surface of the iron core baffle (13) corresponds to the rectangular inlay groove (15); A cylinder with a through-hole structure is provided in the middle of the stator bracket (4), and a plurality of connecting ribs (17) are provided between the cylinder in the middle of the stator bracket (4) and the inner wall of the stator bracket (4) for support and fixation.

2. The stator structure of a hub flat wire motor according to claim 1, characterized in that: A plurality of stator cores (1) are mounted on the surface of the core baffle (13), each of the stator cores (1) being assembled from 3N core segments (6), and the outer walls of the core segments (6) are wound with flat wire windings (2).

3. The stator structure of a hub flat wire motor according to claim 2, characterized in that: Each of the core segments (6) is provided with a semicircular inlay groove (7) and a semicircular insert (9), a dovetail inlay groove (8) and a dovetail insert (10), a rectangular insert (11) and an insert pin hole (12); the semicircular inlay grooves (7) and the semicircular insert (9) on adjacent core segments (6) are interlocked, and the dovetail inlay grooves (8) and the dovetail insert (10) on adjacent core segments (6) are interlocked, so that the core segments (6) are firmly combined together.

4. The stator structure of a hub flat wire motor according to claim 3, characterized in that: The stator bracket (4) is provided with a fixing pin (5), an iron core baffle (13), a pin hole (14), a rectangular insert groove (15), and a keyway (16) structure; the rectangular insert (11) on the iron core assembly (6) is inserted into the rectangular insert groove (15), and the fixing pin (5) passes through the pin hole (14) and the insert pin hole (12), thereby fixing the iron core assembly (6) on the stator bracket (4).

5. The stator structure of a hub flat wire motor according to claim 1, characterized in that: A keyway (16) is provided on the inner wall of the cylinder in the middle of the stator bracket (4).

6. The stator structure of a hub flat wire motor according to claim 3, characterized in that: The surface of the core assembly (6) is provided with slot insulation (3).

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