Winding stator core hub motor

Abstract

The utility model discloses a winding stator core wheel hub motor, which relates to the technical field of motors, and comprises a disc brake cover, a rotor assembly and a stator assembly, the stator assembly and the rotor assembly are respectively connected with a side cover and the disc brake cover through a first bearing and a second bearing, and an air gap is arranged between the stator assembly and the rotor assembly; the stator assembly comprises a stator iron core, a winding, a stator support, a motor shaft and a power line, the winding is installed on the stator iron core, the stator support is arranged in the middle of the stator iron core, the motor shaft is arranged in the center of the stator support, and the power line connected to the interior of the winding is arranged on the outer side of the side cover. The top of the magnetic steel is scraped to a certain depth, and a space is reserved for magnetic steel glue, so that the magnetic steel and the rotor core can be bonded more firmly, the bore sweeping risk is reduced, and the service life of the motor is prolonged. By adopting the scheme, the cost of the motor can be reduced, and the cogging torque, the torque ripple and the vibration noise of the motor can also be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a wound stator iron core hub motor. Background Art

[0002] In-wheel motor stators are typically manufactured using either integral stamping or split stamping followed by lamination. With integral stamping, significant silicon steel sheet waste increases core costs, while split stamping requires a rounding process and makes it difficult to ensure the outer roundness of the stator core, increasing manufacturing difficulty and time, impacting product quality. With the widespread adoption and development of electric vehicles, requirements for motor cost, production efficiency, and vibration noise levels are becoming increasingly stringent.

[0003] At present, the stator core of the hub motor adopts a winding process, and the width of the motor slot is limited and cannot be set arbitrarily, which will cause large motor slot torque, high harmonic content, and high vibration noise. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a hub motor with a wound stator core to solve the current technical problem that the stator core of the hub motor adopts a winding process, the motor slot width is limited and cannot be set arbitrarily, which will cause the motor to have large cogging torque, high harmonic content, and large vibration noise.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A wound stator core hub motor includes a disc brake cover, a rotor assembly, a stator assembly, a side cover, a first bearing, a motor shaft, a power line, a stator bracket, a magnetic steel, a rotor core, a wheel hub, a winding, a stator core, and a second bearing. The stator assembly and the rotor assembly are connected to the side cover and the disc brake cover via the first bearing and the second bearing, respectively, and an air gap is provided between the stator assembly and the rotor assembly.

[0007] The stator assembly includes a stator core, windings, a stator bracket, a motor shaft, and a power line. The stator core is formed by a winding process, the windings are installed on the stator core, a stator bracket is provided in the middle of the stator core, the motor shaft is provided at the center of the stator bracket, and a power line connected to the inside of the windings is provided on the outside of the side cover;

[0008] The rotor assembly includes a rotor core installed outside the stator core, a surface of the rotor core is provided with magnetic steel, and the rotor core is installed on the inner ring of the hub.

[0009] As a preferred technical solution of the present invention, the tooth tops of the stator core are provided with 1 to 3 shaping slots.

[0010] As a preferred technical solution of the present invention, the groove shape of each of the modified grooves on the tooth top of the stator core is a triangle, rectangle or arc with a certain depth and width.

[0011] As a preferred technical solution of the present invention, the magnetic steel adopts a bread shape or a tile shape with trimmed sides, and the top of the magnetic steel is flattened with a flattening depth of 0.05mm to 0.3mm to serve as a glue storage tank.

[0012] As a preferred technical solution of the present invention, the stator bracket is made of iron or aluminum alloy.

[0013] As a preferred technical solution of the present invention, the outer diameter of the stator core is 100 to 400 mm, and the inner diameter is 50 to 350 mm.

[0014] The beneficial effects of the utility model are:

[0015] The stator core utilizes a winding process to increase the utilization rate of silicon steel sheets and reduce stator core costs. The stator core tooth tops feature triangular, rectangular, or arc-shaped modifications of a certain depth and width. The magnets are bread-shaped or tile-shaped with modifications on both sides. By optimizing the stator core tooth top slot size, position, and magnet shape, the air gap flux density can be made more sinusoidal, reducing harmonic content, thereby reducing cogging torque, torque ripple, and motor vibration and noise. The top of the magnet is flattened to a certain depth to reserve space for the magnetic glue, which allows for a stronger bond between the magnet and the rotor core, reduces the risk of bore scraping, and increases the motor's service life. This solution reduces both motor cost and cogging torque, torque ripple, and vibration and noise.

[0016] In response to the problems raised in the background technology, the utility model proposes a wound stator core hub motor, which adopts a wound core to effectively reduce the cost of the motor core; a certain modified groove is added to the stator tooth top, and the magnet adopts a bread or tile type with modified sides to optimize the motor harmonics and tooth slot torque; the top of the magnet is flattened as a glue storage tank to make the magnet and the rotor core more firmly bonded.

[0017] 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

[0018] Figure 1 This is a cross-sectional view of the internal structure of the utility model;

[0019] Figure 2 This is a schematic structural diagram of the stator assembly of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the rotor assembly of the utility model;

[0021] Figure 4 This is a schematic diagram of the stator core winding of the utility model;

[0022] Figure 5 This is a schematic structural diagram of the rotor assembly of the utility model;

[0023] Figure 6 This is a schematic diagram of the tooth top shaping slot of the stator core of the utility model;

[0024] Figure 7 This is a schematic diagram of the magnetic steel of the utility model;

[0025] In the figure: disc brake cover 1, rotor assembly 2, stator assembly 3, side cover 4, through bearing 5, motor shaft 6, power line 7, stator bracket 8, magnet 9, rotor core 10, wheel hub 11, winding 12, stator core 13, bearing 14, and trimming slot 15. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example 1

[0032] See also Figure 1-7 , which is a technical solution provided by the utility model: a wound stator core hub motor, including a disc brake cover 1, a rotor assembly 2, a stator assembly 3, a side cover 4, a first bearing 5, a motor shaft 6, a power line 7, a stator bracket 8, a magnetic steel 9, a rotor core 10, a hub 11, a winding 12, a stator core 13, and a second bearing 14. The stator assembly 3 and the rotor assembly 2 are connected to the side cover 4 and the disc brake cover 1 through the first bearing 5 and the second bearing 14 respectively. An air gap is provided between the stator assembly 3 and the rotor assembly 2;

[0033] The stator assembly 3 includes a stator core 13, a winding 12, a stator bracket 8, a motor shaft 6, and a power line 7. The winding 12 is mounted on the stator core 13. The stator core 13 is formed by a winding process. The stator bracket 8 is provided in the middle of the stator core 13. The motor shaft 6 is provided at the center of the stator bracket 8. The power line 7 connected to the inside of the winding 12 is provided on the outside of the side cover 4.

[0034] The rotor assembly 2 includes a rotor core 10 mounted on the outside of the stator core 13 . Magnets 9 are provided on the surface of the rotor core 10 . The rotor core 10 is mounted on the inner ring of the hub 11 .

[0035] Specifically, in this embodiment, one to three shaping slots 15 are provided on the tooth tops of the stator core 13 .

[0036] Specifically, in this embodiment, the groove shape of each modified groove 15 on the tooth top of the stator core 13 is a triangle, rectangle or arc with a certain depth and width.

[0037] Specifically, in this embodiment, the stator bracket 8 is made of iron or aluminum alloy.

[0038] Specifically, in this embodiment, the stator core 13 has an outer diameter of 300 mm and an inner diameter of 250 mm.

[0039] Therefore, the technical effects produced in this embodiment are as follows: the stator core adopts a winding process, which increases the utilization rate of silicon steel sheets and reduces the cost of the stator core; the stator core tooth tops are provided with triangular, rectangular, or arc-shaped modifications of a certain depth and width, and the magnets are bread-shaped or tile-shaped with modifications on both sides. By optimizing the size, position, and shape of the stator core tooth top slots, the air gap magnetic density can be made more sinusoidal, the harmonic content can be reduced, and the cogging torque and torque ripple can be reduced, thereby reducing the vibration and noise of the motor. The top of the magnet is flattened to a certain depth to reserve space for the magnetic steel glue, which can make the magnet and the rotor core more firmly bonded, reduce the risk of bore scraping, and increase the service life of the motor. The above solution can reduce the cost of the motor and reduce the cogging torque, torque ripple, and vibration and noise of the motor.

[0040] In summary, the utility model proposes a wound stator core hub motor, which adopts a wound core and can effectively reduce the cost of the motor core; a certain modified groove is added to the stator tooth top, and the magnet adopts a bread or tile type with modified sides to optimize the motor harmonics and tooth slot torque; the top of the magnet is flattened as a glue storage tank, so that the magnet and the rotor core are more firmly bonded.

[0041] Example 2

[0042] See also Figure 1-7 , which is another technical solution provided by the present invention. This embodiment is similar to the above-mentioned embodiment 1, and the similarities are not elaborated in this embodiment. The specific differences are:

[0043] A wound stator core hub motor includes a disc brake cover 1, a rotor assembly 2, a stator assembly 3, a side cover 4, a first bearing 5, a motor shaft 6, a power line 7, a stator bracket 8, a magnetic steel 9, a rotor core 10, a wheel hub 11, a winding 12, a stator core 13, and a second bearing 14. The stator assembly 3 and the rotor assembly 2 are connected to the side cover 4 and the disc brake cover 1 respectively through the first bearing 5 and the second bearing 14. An air gap is provided between the stator assembly 3 and the rotor assembly 2.

[0044] The stator assembly 3 includes a stator core 13, a winding 12, a stator bracket 8, a motor shaft 6, and a power line 7. The winding 12 is mounted on the stator core 13, the stator bracket 8 is provided in the middle of the stator core 13, the motor shaft 6 is provided at the center of the stator bracket 8, and the power line 7 connected to the inside of the winding 12 is provided on the outside of the side cover 4;

[0045] The rotor assembly 2 includes a rotor core 10 mounted on the outside of the stator core 13 . Magnets 9 are provided on the surface of the rotor core 10 . The rotor core 10 is mounted on the inner ring of the hub 11 .

[0046] Specifically, in this embodiment, the magnetic steel 9 adopts a bread shape or a tile shape with trimmed sides, and the top of the magnetic steel 9 is flattened with a flattening depth of 0.2 mm to serve as a glue storage tank.

[0047] Therefore, the technical effects produced in this embodiment are as follows: the stator core adopts a winding process, which increases the utilization rate of silicon steel sheets and reduces the cost of the stator core; the stator core tooth tops are provided with triangular, rectangular, or arc-shaped modifications of a certain depth and width, and the magnets are bread-shaped or tile-shaped with modifications on both sides. By optimizing the size, position, and shape of the stator core tooth top slots, the air gap magnetic density can be made more sinusoidal, the harmonic content can be reduced, and the cogging torque and torque ripple can be reduced, thereby reducing the vibration and noise of the motor. The top of the magnet is flattened to a certain depth to reserve space for the magnetic steel glue, which can make the magnet and the rotor core more firmly bonded, reduce the risk of bore scraping, and increase the service life of the motor. The above solution can reduce the cost of the motor and reduce the cogging torque, torque ripple, and vibration and noise of the motor.

[0048] In summary, the utility model proposes a wound stator core hub motor, which adopts a wound core and can effectively reduce the cost of the motor core; a certain modified groove is added to the stator tooth top, and the magnet adopts a bread or tile type with modified sides to optimize the motor harmonics and tooth slot torque; the top of the magnet is flattened as a glue storage tank, so that the magnet and the rotor core are more firmly bonded.

[0049] 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 wound stator core hub motor, comprising a disc brake cover (1), a rotor assembly (2), a stator assembly (3), a side cover (4), a first bearing (5), a motor shaft (6), a power line (7), a stator bracket (8), a magnetic steel (9), a rotor core (10), a hub (11), a winding (12), a stator core (13), and a second bearing (14), characterized in that: The stator assembly (3) and the rotor assembly (2) are connected to the side cover (4) and the disc brake cover (1) respectively through a first bearing (5) and a second bearing (14), and an air gap is provided between the stator assembly (3) and the rotor assembly (2); The stator assembly (3) comprises a stator core (13), a winding (12), a stator bracket (8), a motor shaft (6), and a power line (7); the stator core (13) is formed by a winding process; the winding (12) is mounted on the stator core (13); the stator bracket (8) is provided in the middle of the stator core (13); the motor shaft (6) is provided at the center of the stator bracket (8); and the power line (7) connected to the inside of the winding (12) is provided on the outside of the side cover (4); The rotor assembly (2) comprises a rotor core (10) mounted on the outside of a stator core (13), a magnetic steel (9) being provided on the surface of the rotor core (10), and the rotor core (10) being mounted on the inner ring of a wheel hub (11).

2. The wound stator core hub motor according to claim 1, characterized in that: One to three shaping slots (15) are provided on the tooth tops of the stator core (13).

3. The wound stator core hub motor according to claim 2, characterized in that: The groove shape of each modified groove (15) on the tooth top of the stator core (13) is a triangle, rectangle or arc shape with a certain depth and width.

4. The wound stator core hub motor according to claim 1, characterized in that: The magnetic steel (9) is in a bread shape or a tile shape with trimmed sides, and the top of the magnetic steel (9) is flattened to a depth of 0.05 mm to 0.3 mm, serving as a glue storage tank.

5. The wound stator core hub motor according to claim 4, characterized in that: The stator bracket (8) is made of iron or aluminum alloy material.

6. The wound stator core hub motor according to claim 1, characterized in that: The stator core (13) has an outer diameter of 100 to 400 mm and an inner diameter of 50 to 350 mm.

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