Hollow cup 3D impeller high-rotation-speed motor structure for draught fan

Abstract

The utility model discloses a hollow cup D impeller high-rotation-speed motor structure for a fan, which comprises a shell, a machine shell arranged in the shell, a 3D impeller arranged at the upper end of the machine shell, a fan cover arranged at the top of the 3D impeller and connected with the shell, a rotating shaft arranged in the middle of the machine shell, magnetic steel arranged at the lower end of the rotating shaft, and a stator assembly arranged on the outer side of the rotating shaft. The upper end of the rotating shaft away from the magnetic steel is provided with a bearing support and two bearings. The beneficial effects of the utility model are that the winding is winded on the plastic support in advance, thereby reducing the vibration of the winding when the motor works, optimizing the technology of the iron core winding, using the 3D impeller, bearing the load brought by the high rotation speed of the coreless motor, using the bearing support, enabling the whole motor to be simple in installation, optimizing the installation process, and being capable of bearing the high rotation speed of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a high-speed motor structure with a hollow cup 3D impeller for a fan. Background Art

[0002] 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 the motor efficiency is difficult to break through. At the same time, the winding method of the hollow cup determines its high manufacturing difficulty and structural instability. The existing impeller does not support the high speed characteristics of the hollow cup, and the concentricity of the bearing chamber is not suitable for high-speed environments. Utility Model Content

[0003] The purpose of the present utility model is to provide a high-speed motor structure with a hollow cup 3D impeller for a fan, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hollow cup 3D impeller high-speed motor structure for a fan, comprising an outer shell, a casing provided inside the outer shell, a 3D impeller provided at the upper end of the casing, a wind cover connected to the outer shell provided at the top of the 3D impeller, a rotating shaft provided in the middle of the casing, a magnet provided at the lower end of the rotating shaft, a stator assembly provided on the outside, and a bearing bracket and two bearings provided at the upper end of the rotating shaft away from the magnet.

[0005] Further optimized, the stator assembly is composed of a yoke core and a plastic bracket, and the coil is fixed on the plastic bracket.

[0006] Further optimized, the 3D impeller and the rotating shaft are installed with interference fit.

[0007] For further optimization, a step with a fixed installation height relative to the rotating shaft is provided inside the 3D impeller.

[0008] For further optimization, the two bearings are an integrated structure, and a step structure is provided on the rotating shaft.

[0009] For further optimization, a metal insert connected to the inner wall of the casing is provided on the outer side of the bearing bracket.

[0010] Further optimized, the stator assembly and the casing are fixedly connected by a plurality of screws.

[0011] Beneficial effects

[0012] The utility model provides a high-speed motor structure with a hollow cup 3D impeller for a fan. The winding is pre-wound on a plastic bracket, which reduces the vibration of the winding when the motor is working and optimizes the process of the iron core winding. The 3D impeller is used to bear the load brought by the high speed of the hollow cup motor. The bearing bracket is used, and the overall installation of the motor is simple, which optimizes the installation process and can bear the high speed of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic 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. DETAILED DESCRIPTION

[0015] 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.

[0016] Example

[0017] like Figure 1-2 As shown, a hollow cup 3D impeller high-speed motor structure for a fan includes a shell 1, a casing 2 is provided inside the shell 1, a 3D impeller 3 is provided at the upper end of the casing 2, a wind cover 4 connected to the shell 1 is provided on the top of the 3D impeller 3, a rotating shaft 5 is provided in the middle of the casing 2, a magnet 6 is provided at the lower end of the rotating shaft 5, a stator assembly 7 is provided on the outside, and a bearing bracket 8 and two bearings 9 are provided at the upper end of the rotating shaft 5 away from the magnet 6.

[0018] In this embodiment, the stator assembly 7 comprises a yoke core 10 and a plastic bracket 11. A coil is secured to the plastic bracket 11, which is then fixed to a plastic mounting frame. This reduces the weight of the stator core, thereby reducing iron losses and improving efficiency. Because the core is toothless, the motor has no cogging torque, reducing torque fluctuations and providing a smoother operation.

[0019] The 3D impeller 3 and the rotating shaft 5 are installed with an interference fit. A step with a fixed installation height relative to the rotating shaft 5 is provided inside the 3D impeller 3 to improve the efficiency of the air duct. The size of the impeller and the wind cover are relatively precise, and the step setting reduces the difficulty of the process installation.

[0020] The two bearings 9 are an integrated structure, and a step structure is provided on the rotating shaft 5. The bearing bracket is machined. This installation method can ensure the concentricity of the two bearings. At the same time, a step is provided on the rotating shaft to provide a preload force for the bearings. The two bearings and the bearing bracket are in the form of components, which facilitates production line installation.

[0021] A metal insert 12 connected to the inner wall of the casing 2 is provided on the outside of the bearing bracket 8. The stator assembly 7 is fixed to the casing 2 by multiple screws. The metal insert is bonded with glue to ensure the concentricity of the rotor and the casing. At the same time, the stator is directly mounted on the casing by three screws.

[0022] By eliminating the winding teeth, the stator's inner diameter is increased, which in turn increases the air gap and rotor speed while maintaining the same rotor size. Winding is performed using a bracket first, and then the bracket's anti-rotation bumps are used to mate with the core. This reduces vibration during motor operation and optimizes the core winding process. Glue is also applied to the outside of the plastic bracket to ensure axial stability to the core.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A high-speed motor structure with a coreless 3D impeller for a fan, characterized by: The invention comprises a shell (1), a casing (2) is provided inside the shell (1), a 3D impeller (3) is provided at the upper end of the casing (2), a wind shield (4) connected to the shell (1) is provided at the top of the 3D impeller (3), a rotating shaft (5) is provided in the middle of the casing (2), a magnetic steel (6) is provided at the lower end of the rotating shaft (5), and a stator assembly (7) is provided on the outer side, and a bearing bracket (8) and two bearings (9) are provided at the upper end of the rotating shaft (5) away from the magnetic steel (6).

2. The high-speed motor structure with a hollow cup 3D impeller for a fan according to claim 1 is characterized by: The stator assembly (7) is composed of a yoke core (10) and a plastic bracket (11), and a coil is fixed on the plastic bracket (11).

3. The high-speed motor structure with a hollow cup 3D impeller for a fan according to claim 1 is characterized in that: The 3D impeller (3) and the rotating shaft (5) are installed in an interference fit.

4. The high-speed motor structure with a hollow cup 3D impeller for a fan according to claim 3 is characterized by: A step having a fixed installation height relative to the rotating shaft (5) is provided inside the 3D impeller (3).

5. The high-speed motor structure with a hollow cup 3D impeller for a fan according to claim 1 is characterized in that: The two bearings (9) are an integrated structure, and a step structure is provided on the rotating shaft (5).

6. The high-speed motor structure with a hollow cup 3D impeller for a fan according to claim 1 is characterized by: A metal insert (12) connected to the inner wall of the housing (2) is provided on the outer side of the bearing bracket (8).

7. The high-speed motor structure with a coreless 3D impeller for a fan according to claim 1 is characterized by: The stator assembly (7) is fixedly connected to the housing (2) via a plurality of screws.

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