Wheel hub motor stator

Abstract

The utility model discloses a wheel hub motor stator, comprising a stator body, 18 armature teeth are annularly distributed on the surface of the stator body, 18 armature slots are arranged between two adjacent armature teeth, the armature slots are divided into 9 first armature slots and 9 second armature slots, the first armature slots and the second armature slots are distributed at intervals, and the first armature slots and the second armature slots are distributed at intervals. And heat dissipation teeth are arranged in the first armature slots. According to the utility model, the heat dissipation teeth are added in the armature slots, the contact area between the winding and the iron core is increased, the heat dissipation capability of the stator winding is improved, the slot pitch of the armature slots with the heat dissipation teeth is greater than that of the armature slots without the heat dissipation teeth, and the same winding area and slot fullness rate are ensured.

Description

Technical Field

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

[0002] The hub motor is a motor designed by integrating the vehicle's "power system, transmission system, and brake system". In the existing electric power-assisted bicycle structure, the hub motor structure often adopts an outer rotor and an inner rotor structure, among which the outer rotor is widely used due to its advantage of large torque.

[0003] The existing outer rotor hub motor has a stator that does not contact the casing, and the heat is dissipated by the stator core contacting the shaft. There is air between the two windings, which has poor thermal conductivity and cannot effectively transfer the heat of the windings to the stator core. Therefore, the heat dissipation capacity is poor, which limits the output power of the outer rotor hub motor.

[0004] Therefore, how to provide a hub motor stator to solve the problems existing in the prior art is of great significance to its application. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide a hub motor stator to solve the problem.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hub motor stator comprises a stator body, wherein 18 armature teeth are distributed in an annular manner on the surface of the stator body, 18 armature slots are arranged between two adjacent armature teeth, the armature slots are divided into 9 first armature slots and 9 second armature slots, the first armature slots and the second armature slots are distributed at intervals, and heat dissipation teeth are arranged inside the first armature slots.

[0008] Preferably, the slot pitch of the first armature slots is greater than the slot pitch of the second armature slots.

[0009] Preferably, no winding is wound around the heat dissipation teeth, and a winding is wound only between two adjacent armature teeth.

[0010] Preferably, the heat dissipation tooth is located in the center of the first armature slot, and the heat dissipation tooth is integrally formed with the stator body.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model adds heat dissipation teeth in the armature slots, increases the contact area between the winding and the iron core, and improves the heat dissipation capacity of the stator winding.

[0013] 2. The slot pitch of the armature slot with heat dissipation teeth in the utility model is larger than that of the armature slot without heat dissipation teeth, thereby ensuring the same winding area and slot fill rate.

[0014] 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 so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0015] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0018] Figure 2 This is a structural schematic diagram of the second embodiment of the utility model. In the figure: 1, stator body; 2, heat dissipation teeth; 3, first armature slot; 4, second armature slot; 5, armature teeth. DETAILED DESCRIPTION

[0019] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0020] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0021] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0022] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0023] See also Figure 1-2 , the present invention provides a technical solution for a hub motor stator:

[0024] Embodiment one:

[0025] It includes a stator body 1, on the surface of which 18 armature teeth 5 are distributed in a ring shape, 18 armature slots are arranged between two adjacent armature teeth 5, the armature slots are divided into 9 first armature slots 3 and 9 second armature slots 4, the first armature slots 3 and the second armature slots 4 are distributed at intervals, and heat dissipation teeth 2 are arranged inside the first armature slots 3.

[0026] The slot pitch of the first armature slots 3 is greater than the slot pitch of the second armature slots 4 .

[0027] There is no winding wound around the heat dissipation teeth 2 , and there is a winding wound only between two adjacent armature teeth 5 .

[0028] The heat dissipation tooth 2 is located in the center of the first armature slot 3 , and the heat dissipation tooth 2 is integrally formed with the stator body 1 .

[0029] A heat dissipation tooth 2 is placed every two armature teeth 5. The second armature slot 4 is an armature slot without a heat dissipation tooth, and the first armature slot 3 is an armature slot with a heat dissipation tooth. At the same time, in order to ensure that the first armature slot 3 and the second armature slot 4 have the same winding area, two adjacent armature teeth 5 are offset to ensure that the armature tooth slot and the heat dissipation tooth slot have the same slot full rate. This structure can make the stator have a larger slot full rate while enhancing the heat dissipation capacity of the stator.

[0030] Embodiment two:

[0031] It comprises a stator body 1, on the surface of which 18 armature teeth 5 are distributed in an annular manner, 18 armature slots are arranged between two adjacent armature teeth 5, and a heat dissipation tooth 2 is installed in the middle of each armature slot;

[0032] The heat dissipation teeth 2 are not wound with windings, but are only in contact with the windings on two adjacent armature teeth 5, thereby increasing the heat dissipation area of ​​the windings, conducting the heat generated by the windings through the iron core, and enhancing the heat dissipation capacity of the stator.

[0033] During specific use, the winding is passed around the armature teeth 5 to complete the stator winding, and a heat dissipation tooth 2 is arranged between the two windings to enhance the thermal conductivity and effectively conduct the heat of the winding to the stator core. Therefore, the heat dissipation capacity is improved and the output power of the outer rotor hub motor will not be limited.

[0034] The above description is only the preferred embodiment of the utility model, which does not limit the protection scope of the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any changes, modifications, substitutions, integrations and parameter changes to these embodiments within the spirit and principle of the utility model through conventional substitutions or capable of achieving the same functions without departing from the principles and spirit of the utility model shall fall within the protection scope of the utility model.

Claims

1. A hub motor stator, characterized in that: The invention comprises a stator body (1), wherein 18 armature teeth (5) are distributed in an annular manner on the surface of the stator body (1), 18 armature slots are arranged between two adjacent armature teeth (5), the armature slots are divided into 9 first armature slots (3) and 9 second armature slots (4), the first armature slots (3) and the second armature slots (4) are distributed at intervals, and heat dissipation teeth (2) are arranged inside the first armature slots (3).

2. A hub motor stator according to claim 1, characterized in that: The slot pitch of the first armature slot (3) is greater than the slot pitch of the second armature slot (4).

3. A hub motor stator as claimed in claim 2, characterized in that: No winding is wound on the heat dissipation teeth (2), and only a winding is wound between two adjacent armature teeth (5).

4. A hub motor stator as claimed in claim 3, characterized in that: The heat dissipation tooth (2) is located in the middle of the first armature slot (3), and the heat dissipation tooth (2) is integrally formed with the stator body (1).

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