Hollow cup stator motor structure for fan

Abstract

The utility model discloses a hollow cup stator motor structure for a fan, which comprises an air duct assembly and a support assembly, a hollow cup stator is arranged between the air duct assembly and the support assembly, a rotor assembly is arranged in the middle of the hollow cup stator, the hollow cup stator comprises an iron core yoke part, and a plastic mounting frame is arranged in the iron core yoke part. And a coil winding is wound on the plastic mounting frame. The coreless stator has the beneficial effects that through the coreless stator without a tooth part structure, air gaps are correspondingly increased under the condition that the size of the rotor is not changed, the rotating speed of the rotor is increased, the efficiency of the motor is improved, and a light load stage curve in the characteristics of the motor is efficiently used.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow cup motors, in particular to a hollow cup stator motor structure for a fan. Background Art

[0002] Coreless motors are divided into two types: brushed and brushless. The stator of a brushless coreless motor has no iron core. The coreless motor eliminates the iron core structure, which essentially solves the various problems caused by the iron core structure. Therefore, in addition to the high power density brought by the small size, the coreless motor also has the characteristics of high efficiency, fast speed, and fast response.

[0003] However, during use, existing fans often only need to use a certain point in the characteristic curve. They have high requirements for speed but low requirements for torque, and it is difficult to break through the efficiency of coreless motors, resulting in a considerable waste of the motor characteristic curve. At the same time, the difficulty of coreless motors lies in manufacturing, and their winding method determines their high manufacturing difficulty and unstable structure. Utility Model Content

[0004] The utility model aims to provide a hollow cup stator motor structure for a fan to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a hollow cup stator motor structure for a fan, comprising an air duct assembly and a bracket assembly, a hollow cup stator is arranged between the air duct assembly and the bracket assembly, a rotor assembly is arranged in the middle of the hollow cup stator, the hollow cup stator comprises an iron core yoke, a plastic mounting frame is arranged inside the iron core yoke, and a coil winding is wound on the plastic mounting frame.

[0007] Furthermore, the upper and lower ends of the hollow cup stator are connected to the air duct assembly and the bracket assembly through the core yoke.

[0008] Furthermore, a rotation-stopping protrusion is provided on the inner side of the core yoke, and the plastic mounting frame is matched and connected with the core yoke via the rotation-stopping protrusion.

[0009] Furthermore, the plastic mounting frame is ring-shaped, and comprises a mounting portion and a plurality of support frames, wherein the plurality of support frames are arranged at equal distances with the core yoke portion as the center of the circle.

[0010] Furthermore, the mounting portion is fixedly connected to the core yoke portion by glue dispensing.

[0011] Furthermore, the upper and lower ends of the rotating shaft of the rotor assembly are connected to the air duct assembly and the bracket assembly through positioning bearings.

[0012] Beneficial effects: A hollow cup stator motor structure for a fan, through a hollow cup stator with a toothless structure, achieves a corresponding increase in the air gap without changing the rotor size, increases the rotor speed, improves the motor efficiency, and efficiently uses the light load stage curve in the motor characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the hollow cup stator structure of the utility model.

[0015] Reference numerals

[0016] 1- air duct assembly, 2- bracket assembly, 3- hollow cup stator, 31- iron core yoke, 32- plastic mounting frame, 321- mounting portion, 322- supporting frame, 4- rotor assembly, 5- coil winding. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] Example

[0019] like Figure 1-2 As shown, a hollow cup stator motor structure for a fan includes an air duct assembly 1 and a bracket assembly 2, a hollow cup stator 3 is arranged between the air duct assembly 1 and the bracket assembly 2, a rotor assembly 4 is arranged in the middle of the hollow cup stator 3, the hollow cup stator 3 includes an iron core yoke 31, a plastic mounting frame 32 is arranged inside the iron core yoke 31, and a coil winding 5 is wound on the plastic mounting frame 32.

[0020] The upper and lower ends of the hollow cup stator 3 are connected to the air duct assembly 1 and the bracket assembly 2 through the core yoke 31, and are positioned by multiple screws. The core yoke 31 formed by stacking punching sheets is positioned to improve the overall installation accuracy of the motor.

[0021] A stopper is provided on the inner side of the core yoke 31, and the plastic mounting frame 32 is matched and connected with the core yoke 31 through the stopper. The plastic mounting frame 32 is annular and includes a mounting portion 321 and a plurality of support frames 322. The plurality of support frames 322 are arranged at equal distances with the core yoke 31 as the center. The coil winding 33 is fixed on the plurality of support frames 322 of the plastic mounting frame 32 to reduce the weight of the stator core and reduce iron loss. The mounting portion 321 is fixedly connected to the core yoke 31 by glue dispensing. The plastic mounting frame 32 is installed with the stopper through the stopper after winding, and then the mounting portion 321 and the core yoke 31 are fixed by glue dispensing, so as to reduce the vibration of the coil winding 5 when the motor is working, optimize the core winding process, and prevent the coil winding 5 from spreading.

[0022] When in use, the coil winding 5 is pre-wound on the support frame 322 of the plastic mounting frame 32. The plastic mounting frame 32 is seamlessly connected to the core yoke 31, which reduces the vibration of the coil winding when the motor is working and optimizes the process of the core winding. The hollow cup stator 3 eliminates the teeth used for winding, increases the inner diameter of the stator, and increases the air gap accordingly while keeping the rotor size unchanged, thereby increasing the rotor speed in turn. When the hollow cup motor has high requirements on speed but low requirements on torque, the motor efficiency is improved, and the light load stage curve in the motor characteristics is used efficiently.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A hollow cup stator motor structure for a fan, comprising an air duct assembly (1) and a bracket assembly (2), characterized in that: A hollow cup stator (3) is provided between the air duct assembly (1) and the bracket assembly (2), a rotor assembly (4) is provided in the middle of the hollow cup stator (3), the hollow cup stator (3) comprises an iron core yoke (31), a plastic mounting frame (32) is provided inside the iron core yoke (31), and a coil winding (5) is wound on the plastic mounting frame (32).

2. The hollow cup stator motor structure for a fan according to claim 1, characterized in that: The upper and lower ends of the hollow cup stator (3) are connected to the air duct assembly (1) and the bracket assembly (2) through the iron core yoke (31).

3. The hollow cup stator motor structure for a fan according to claim 1, characterized in that: The inner side of the core yoke (31) is provided with a rotation-stopping protrusion, and the plastic mounting frame (32) is matched and connected to the core yoke (31) via the rotation-stopping protrusion.

4. The hollow cup stator motor structure for a fan according to claim 1, characterized in that: The plastic mounting frame (32) is ring-shaped and comprises a mounting portion (321) and a plurality of support frames (322). The plurality of support frames (322) are arranged at equal distances with the core yoke portion (31) as the center of the circle.

5. The hollow cup stator motor structure for a fan according to claim 4, characterized in that: The mounting portion (321) is fixedly connected to the core yoke portion (31) by glue dispensing.

6. The hollow cup stator motor structure for a fan according to claim 1, characterized in that: The upper and lower ends of the rotating shaft of the rotor assembly (4) are connected to the air duct assembly (1) and the bracket assembly (2) via positioning bearings.

Images