Inner rotor coreless motor for dust collector
By designing an internal rotor hollow cup motor and utilizing optimized structures such as 3D impellers, bearing supports, and toothless iron cores, the efficiency and heat dissipation problems of the motor at high speeds are solved, achieving efficient operation and stability of the motor.
Patent Information
- Application Number
- CN202422383857.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Existing wind turbines have low torque requirements under high speed requirements, making it difficult to improve motor efficiency, resulting in high manufacturing difficulty and poor heat dissipation.
The internal rotor hollow cup motor design includes a 3D impeller, bearing bracket, toothless iron core and plastic mounting bracket. The winding is pre-wound on the plastic bracket. Combined with the clearance design and airflow guiding effect of the housing, the winding process is optimized to reduce vibration and improve temperature rise.
It improves the efficiency and structural stability of the motor, reduces vibration and temperature rise issues, and enhances the motor's heat dissipation performance.
Smart Images
Figure CN223771827U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hollow cup rotor motor technology, specifically an inner rotor hollow cup motor for vacuum cleaners. Background Technology
[0002] Existing wind turbines require high rotational speeds but relatively low torque during operation, making it difficult to improve motor efficiency. Furthermore, the hollow-cup winding method results in high manufacturing difficulty and structural instability. Additionally, these high-speed motors suffer from high heat generation from the iron core and poor heat dissipation. Utility Model Content
[0003] The purpose of this invention is to provide an internal rotor hollow cup motor for a vacuum cleaner to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: an internal rotor hollow cup motor for a vacuum cleaner, comprising a housing, a fan shroud connected to the upper end of the housing, a 3D impeller inside the fan shroud, a rotating shaft connected to the 3D impeller in the middle of the inner cavity of the housing, a bearing bracket between the rotating shaft and the 3D impeller, a magnet at the lower end of the bearing bracket located outside the rotating shaft, and a rotor assembly and a stator assembly sequentially arranged outside the magnet.
[0005] In a further optimized configuration, the bearing bracket has two bearings mounted on the rotating shaft at its upper and lower ends.
[0006] In a further optimized configuration, the stator assembly is composed of a yoke core and a plastic mounting frame, and the coil is wound around the plastic mounting frame.
[0007] In a further optimized configuration, the 3D impeller and the rotating shaft are installed with an interference fit.
[0008] In a further optimized version, the yoke core is a toothless core.
[0009] In a further optimized configuration, the plastic mounting bracket is provided with anti-rotation protrusions, which are used to engage with the yoke core for installation.
[0010] In a further optimization, the plastic mounting bracket is coated with an adhesive that bonds to the yoke core. Beneficial effects
[0011] The hollow cup motor for vacuum cleaners provided by this utility model has its windings pre-wound on a plastic bracket, which reduces the vibration of the windings when the motor is working. The process of the iron core winding is optimized. The use of a 3D impeller and bearing bracket can bear the load brought by the high speed of the hollow cup motor. The clearance design and airflow guiding effect of the housing improve the problem of motor temperature rise. Attached Figure Description
[0012] Figure 1 This is a cross-sectional view of the overall structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the hollow cup stator structure of this utility model. Detailed Implementation
[0014] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example
[0015] like Figure 1-2 As shown, an internal rotor hollow cup motor for a vacuum cleaner includes a housing 1, a fan shroud 2 connected to the upper end of the housing 1, a 3D impeller 5 inside the fan shroud 2, a rotating shaft 3 connected to the 3D impeller 5 in the middle of the inner cavity of the housing 1, a bearing bracket 4 between the rotating shaft 3 and the 3D impeller 5, a magnet 7 located on the outer side of the lower end of the bearing bracket 4 on the rotating shaft 3, and a rotor assembly and a stator assembly arranged sequentially on the outer side of the magnet 7.
[0016] In this embodiment, the bearing bracket 4 has two bearings 6 mounted on the rotating shaft 3 at its upper and lower ends. The bearing part adopts an integrated structure, which enables the structure of the fan to withstand high speed.
[0017] The stator assembly consists of a yoke core 8 and a plastic mounting bracket 9, with the coil wound on the plastic mounting bracket 9, which reduces the weight of the stator core, thereby reducing iron loss and improving efficiency.
[0018] The 3D impeller 5 and the rotating shaft 3 are installed with an interference fit.
[0019] The yoke core 8 is a toothless core. The core is positioned by the steps of the casing. The guide impeller on the casing guides the airflow to the core. There are more clearance positions on the radially positioned side wall so that the airflow can fully contact the core, carry away more heat, and improve the temperature rise.
[0020] The plastic mounting bracket 9 is equipped with anti-rotation protrusions, which are used to mate with the yoke core 8 for installation.
[0021] The plastic mounting bracket 9 is coated with adhesive that bonds to the yoke core 8, making it axially stable with the core.
[0022] The windings are pre-wound on a plastic bracket, which reduces the vibration of the windings when the motor is working. The process of the iron core windings is optimized. 3D impellers and bearing brackets are used to bear the load brought by the high speed of the hollow cup motor. The clearance design and airflow guiding effect of the housing improve the problem of motor temperature rise.
[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. An inner rotor hollow cup motor for a vacuum cleaner, characterized by: The utility model relates to a kind of 3D air blower, including shell (1), the upper end of the shell (1) is equipped with and is connected with wind cover (2), 3D impeller (5) is equipped in the wind cover (2), the middle part of the inner chamber of the shell (1) is equipped with and is connected with the rotating shaft (3) of 3D impeller (5), bearing support (4) is equipped between the rotating shaft (3) and 3D impeller (5), the lower end of the bearing support (4) is located the outside of the rotating shaft (3) and is equipped with magnetic steel (7), magnetic steel (7) outside is equipped with rotor assembly and stator assembly in proper order.
2. An inner rotor hollow cup motor for a vacuum cleaner as claimed in claim 1, characterized in that: The inside of the bearing support (4) is equipped with two bearings (6) in upper and lower ends respectively and is sleeved on the rotating shaft (3).
3. An inner rotor hollow cup motor for a vacuum cleaner as claimed in claim 1, characterized in that: The stator assembly is composed of yoke core (8) and plastic mounting bracket (9), and coil is wound on the plastic mounting bracket (9).
4. An inner rotor hollow cup motor for a vacuum cleaner as claimed in claim 1, characterized in that: The 3D impeller (5) and the rotating shaft (3) are installed by interference fit.
5. An inner rotor hollow cup motor for a vacuum cleaner as claimed in claim 3, characterized in that: The yoke core (8) is toothless core.
6. An inner rotor, hollow cup motor for a vacuum cleaner as claimed in claim 3, characterized in that: The plastic mounting bracket (9) is equipped with rotation-stopping convex point, and is installed by cooperating with the yoke core (8) through the convex point.
7. An inner rotor, hollow cup motor for a vacuum cleaner as claimed in claim 3, characterized in that: The plastic mounting bracket (9) is coated with adhesive outside, and the adhesive is bonded with the yoke core (8).