A duct motor with a novel stator frame
By installing plastic-coated parts and limiting structures on the teeth of the stator core, the problem of coil detachment was solved, achieving stable motor operation and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 广东恒翔电器有限公司
- Filing Date
- 2025-08-13
- Publication Date
- 2026-06-30
AI Technical Summary
The coils of traditional duct motors are prone to detaching from the teeth of the stator core under electromagnetic vibration, affecting the normal operation of the motor.
The teeth of the stator core are covered with plastic coating, and limiting protrusions and protrusion steps are set at the ends of the coating tube to limit the electromagnetic vibration of the coil and prevent the coil from detaching from the stator core.
It effectively prevents the coil from detaching from the stator core under electromagnetic vibration, ensuring the normal operation of the motor and improving the stability and lifespan of the motor.
Smart Images
Figure CN224438609U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a duct motor using a novel stator frame. Background Technology
[0002] Traditional hair dryers typically use brushed motors, but due to their drawbacks such as high noise, short lifespan, and low efficiency, brushless motors are gradually becoming the preferred choice for high-end hair dryers. A duct motor is a special type of brushless motor used in hair dryers. It is suitable for the narrow ducts of hair dryers and boasts advantages such as small size and high airflow. Like brushless motors, duct motors mainly consist of a base, stator, and rotor. The stator is fixedly mounted on the base where the duct is located. The stator has multiple coil windings, each consisting of a stator core, a stator housing, and a coil. The inner ring of the stator core usually has several teeth evenly spaced for winding the coil. During operation, the coil is subjected to electromagnetic vibration, and with prolonged use, parts of the coil may detach from the teeth of the stator core, affecting the normal operation of the motor. Therefore, we propose a duct motor with a novel stator frame. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a duct motor with a novel stator frame.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a duct motor with a novel stator frame, comprising an inner housing, a stator assembly, and a mover assembly. The stator assembly is fixedly installed in the inner cavity of the inner housing, and the mover assembly is rotatably disposed in the middle cavity of the stator assembly. The stator assembly includes a stator core, which has a plurality of teeth for winding coils. The inner ring of the stator core is provided with a plastic covering, which is cylindrical. The inner wall of the plastic covering is provided with a plurality of covering protrusions extending toward the center, and the ends of the covering protrusions are flared. Limiting protrusions for limiting the electromagnetic vibration of the coil are provided on both the upper and lower sides of the ends.
[0005] To further elaborate, the ends of the teeth of the stator core are provided with outwardly protruding edges that spread outwards to both sides, and the covering protrusion of the plastic covering is provided with a raised step for covering the outwardly protruding edges.
[0006] To further elaborate, the wall thickness of the bulge in the plastic-coated component ranges from 0.8 mm to 1.2 mm.
[0007] To further elaborate, the moving part assembly includes a rotating shaft and a stator, the stator being fixed to the rotating shaft, the inner housing being provided with a bearing seat, and the rotating bearing of the rotating shaft being installed at the bearing seat of the inner housing.
[0008] To further elaborate, an impeller is installed at the rotating shaft, the impeller is fixed at the front end of the rotating shaft, and the stator is fixed at the rear end of the rotating shaft.
[0009] To elaborate further, the inner housing component has an annular air duct groove on the outer side of the bearing seat, and several air suction holes are opened in the annular air duct groove.
[0010] To elaborate further, an outer protective shell is fitted onto the outer side of the inner housing component.
[0011] The beneficial effects of this utility model are as follows: This utility model provides a plastic covering part in the inner ring of the stator core. The covering protrusion of the plastic covering part covers the teeth of the stator core. The limiting protrusion and the protruding step of the covering protrusion can restrict the coil, so that the coil will not detach from the teeth of the stator core even when subjected to electromagnetic vibration. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Figure 2 This is a cross-sectional view of the structure of this utility model.
[0014] Figure 3 This is a partial structural cross-sectional view of the present invention.
[0015] Figure 4 This is a schematic diagram of the stator assembly.
[0016] Figure 5 This is a partial structural cross-sectional view of the stator assembly.
[0017] Reference numerals: 10. Inner shell component; 11. Bearing seat; 12. Annular air duct groove; 20. Stator assembly; 21. Stator core; 211. Gear; 212. Outer protrusion; 22. Plastic covering component; 221. Covered protrusion tube; 222. Limiting protrusion; 223. Protrusion step; 30. Mover assembly; 31. Rotating shaft; 311. Rotating bearing; 32. Stator component; 40. Impeller; 50. Outer protective shell. Detailed Implementation
[0018] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.
[0019] Specific Implementation Example 1: Combined with Appendix Figure 1 To be continued Figure 3As shown, a duct motor with a novel stator frame includes an inner housing 10, a stator assembly 20, and a mover assembly 30. The stator assembly 20 is fixedly installed in the inner cavity of the inner housing 10, and the mover assembly 30 is rotatably disposed in the middle cavity of the stator assembly 20.
[0020] Combined with appendix Figure 4 and attached Figure 5 As shown, the stator assembly 20 includes a stator core 21. The stator core 21 is provided with a plurality of teeth 211 for winding coils. The inner ring of the stator core 21 is provided with a plastic cover 22. The plastic cover 22 is cylindrical. The inner wall of the plastic cover 22 is provided with a plurality of covering protrusions 221 extending toward the center. The end of the covering protrusions 221 is flared. The upper and lower sides of the end are provided with limiting protrusions 222 for limiting the electromagnetic vibration of the coil.
[0021] The stator core 21 has outwardly convex edges 212 at the ends of the teeth 211, and the plastic sheath 22 has a stepped portion 223 for covering the outwardly convex edges 212. The coil wound on the sheath 221 is restricted in the vertical direction by the limiting protrusion 222 and in the horizontal direction by the stepped portion 223, so that the coil will not detach from the teeth of the stator core even when subjected to electromagnetic vibration.
[0022] Specific Implementation Example 2: Combined with Appendix Figure 1 To be continued Figure 3 As shown, a duct motor with a novel stator frame includes an inner housing 10, a stator assembly 20, and a mover assembly 30. The stator assembly 20 is fixedly installed in the inner cavity of the inner housing 10, and the mover assembly 30 is rotatably disposed in the middle cavity of the stator assembly 20.
[0023] Combined with appendix Figure 4 and attached Figure 5 As shown, the stator assembly 20 includes a stator core 21. The stator core 21 is provided with a plurality of teeth 211 for winding coils. The inner ring of the stator core 21 is provided with a plastic cover 22. The plastic cover 22 is cylindrical. The inner wall of the plastic cover 22 is provided with a plurality of covering protrusions 221 extending toward the center. The end of the covering protrusions 221 is flared. The upper and lower sides of the end are provided with limiting protrusions 222 for limiting the electromagnetic vibration of the coil.
[0024] The stator core 21 has outwardly convex edges 212 at the ends of the teeth 211, and the plastic sheath 22 has a stepped portion 223 for covering the outwardly convex edges 212. The coil wound on the sheath 221 is restricted vertically by the limiting protrusion 222 and horizontally by the stepped portion 223, so that the coil will not detach from the teeth of the stator core even under electromagnetic vibration. The wall thickness of the sheath 221 of the plastic sheath 22 ranges from 0.8mm to 1.2mm. This thickness range ensures that the stepped portion 223 is not too thin and does not take up too much space, thus affecting the winding of the coil.
[0025] Specific Implementation Example 3: Combined with Appendix Figure 1 To be continued Figure 3 As shown, a duct motor with a novel stator frame includes an inner housing 10, a stator assembly 20, and a mover assembly 30. The stator assembly 20 is fixedly installed in the inner cavity of the inner housing 10, and the mover assembly 30 is rotatably disposed in the middle cavity of the stator assembly 20.
[0026] Combined with appendix Figure 4 and attached Figure 5 As shown, the stator assembly 20 includes a stator core 21. The stator core 21 is provided with a plurality of teeth 211 for winding coils. The inner ring of the stator core 21 is provided with a plastic cover 22. The plastic cover 22 is cylindrical. The inner wall of the plastic cover 22 is provided with a plurality of covering protrusions 221 extending toward the center. The end of the covering protrusions 221 is flared. The upper and lower sides of the end are provided with limiting protrusions 222 for limiting the electromagnetic vibration of the coil.
[0027] Combined with appendix Figure 2 and attached Figure 3 As shown, the mover assembly 30 includes a rotating shaft 31 and a stator 32. The stator 32 is fixed to the rotating shaft 31. The inner housing 10 is provided with a bearing seat 11, and the rotating bearing 311 of the rotating shaft 31 is installed in the bearing seat 11 of the inner housing 10. An impeller 40 is installed on the rotating shaft 31, and the impeller 40 is fixed to the front end of the rotating shaft 31. The stator 32 is fixed to the rear end of the rotating shaft 31.
[0028] The inner housing 10 has an annular air duct groove 12 on the outer side of the bearing seat portion 11, and several air intake holes are opened in the annular air duct groove 12. An outer protective shell 50 is fitted on the outer side of the inner housing 10.
[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0030] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.
[0031] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.
Claims
1. A duct motor employing a novel stator frame, comprising an inner housing (10), a stator assembly (20), and a mover assembly (30), wherein the stator assembly (20) is fixedly installed in the inner cavity of the inner housing (10), and the mover assembly (30) is rotatably disposed in the intermediate cavity of the stator assembly (20), wherein the stator assembly (20) comprises a stator core (21), and the stator core (21) is provided with a plurality of teeth (211) for winding coils, characterized in that: The inner ring of the stator core (21) is provided with a plastic cover (22). The plastic cover (22) is cylindrical. The inner wall of the plastic cover (22) is provided with a plurality of covering protrusions (221) extending towards the center. The end of the covering protrusion (221) is flared. The upper and lower sides of the end are provided with limiting protrusions (222) for limiting the electromagnetic vibration of the coil.
2. The duct motor with a novel stator frame according to claim 1, characterized in that: The end of the tooth (211) of the stator core (21) is provided with an outwardly protruding edge (212) that expands to both sides, and the covering protrusion (221) of the plastic covering (22) is provided with a raised step (223) for covering the outwardly protruding edge (212).
3. A duct motor employing a novel stator frame according to claim 1, characterized in that: The wall thickness of the covered protrusion (221) of the plastic covering part (22) ranges from 0.8 mm to 1.2 mm.
4. A duct motor employing a novel stator frame according to claim 1, characterized in that: The moving part assembly (30) includes a rotating shaft (31) and a stator (32). The stator (32) is fixed to the rotating shaft (31). The inner housing part (10) is provided with a bearing seat (11). The rotating bearing (311) of the rotating shaft (31) is installed at the bearing seat (11) of the inner housing part (10).
5. A duct motor employing a novel stator frame according to claim 4, characterized in that: An impeller (40) is installed at the rotating shaft (31), the impeller (40) is fixed at the front end of the rotating shaft (31), and the stator (32) is fixed at the rear end of the rotating shaft (31).
6. A duct motor employing a novel stator frame according to claim 4, characterized in that: The inner housing component (10) has an annular air duct groove (12) on the outside of the bearing seat (11), and several air suction holes are provided at the annular air duct groove (12).
7. A duct motor employing a novel stator frame according to claim 1, characterized in that: The outer protective shell (50) is fitted onto the outer side of the inner shell component (10).