A high-speed motor that reduces hair tangling

Abstract

This invention discloses a high-speed motor that reduces hair entanglement. It includes a motor housing, an impeller, a stator assembly, and a rotor assembly. The motor housing has an air duct, within which a middle frame is installed. The stator assembly and rotor assembly are mounted within the middle frame. The rotor assembly's shaft passes through the stator assembly and is connected to the middle frame via a bearing. One end of the rotor assembly's shaft extends to the outside of the middle frame and connects to the impeller. The edge of the middle frame facing the impeller has at least one annular groove and a ring of retaining grooves. This invention, by using the annular groove and the ring of retaining grooves, can both trap hair in the annular groove (allowing hair that is about to come into contact with the shaft to be trapped there), and pull and limit hair already entangled with the shaft using the retaining grooves, cutting the hair as rotation continues. This comprehensive feature effectively reduces hair entanglement.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a high-speed motor that can reduce hair entanglement. Background Technology

[0002] As we all know, high-speed motors are important power driving devices in everyday appliances. For example, hair dryers also have high-speed motors. The principle is that the high-speed motor drives the impeller on the motor to rotate, generating airflow to dry the user's hair.

[0003] Currently, although hair dryers are equipped with a mesh screen to prevent debris from entering, during prolonged use, it is inevitable that some hair will cross the mesh screen and come into contact with the high-speed motor. Once hair enters, it is most likely to get stuck and tangled, especially around the shaft of the high-speed motor. Once hair gets tangled around the shaft, it will create resistance to the motor's rotation, affecting its operation. As more and more hair gets tangled, the resistance will gradually increase. In severe cases, it can even jam the motor, causing it to burn out. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high-speed motor that can reduce hair tangling.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-speed motor that reduces hair entanglement includes a motor housing, an impeller, a stator assembly, and a rotor assembly. The motor housing has an air duct, and a middle frame is disposed within the air duct. The stator assembly and the rotor assembly are mounted within the middle frame. The shaft of the rotor assembly passes through the stator assembly and is connected to the middle frame via a bearing. One end of the shaft of the rotor assembly extends to the outside of the middle frame and is connected to the impeller. The edge of the middle frame facing the impeller has at least one annular groove and a ring of slots, and the slots communicate with the annular groove.

[0007] Preferably, the inner end face of the impeller is provided with a cover, which covers the end face of the middle frame and covers the bearing, the slot and the annular groove. There is a movable gap between the cover and the side of the middle frame.

[0008] Preferably, the movable gap is 0.1-0.8 mm.

[0009] Preferably, a guide vane is provided between the inner wall of the air duct and the middle frame, and the distance from the impeller blade to the guide vane is 2.5-4.0 mm.

[0010] Preferably, the rotor assembly has two bearings connected to one end of its shaft, and a pre-compressed spring is provided between the bearings.

[0011] By adopting the above solution, this utility model relies on setting up an annular groove and a ring of slots. It can not only retain hair in the annular groove, allowing hair that is about to come into contact with the shaft to be retained in the annular groove, thus achieving the function of hiding hair, but also use the slots to pull and limit the hair that has already become entangled with the shaft, and break off the hair as it continues to rotate, thus achieving the function of cutting the hair. This method of hiding hair can effectively reduce the problem of hair entanglement. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0013] Figure 2 This is a schematic diagram of the structure after the impeller is removed in an embodiment of this utility model.

[0014] Figure 3 This is a cross-sectional view of an embodiment of the present utility model. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0018] like Figures 1 to 3 As shown, this embodiment provides a high-speed motor that reduces hair entanglement, including a motor housing 1, an impeller 2, a stator assembly 3, and a rotor assembly 4. The motor housing 1 is provided with an air duct 5, and a middle frame 6 is provided in the air duct 5. The stator assembly 3 and the rotor assembly 4 are installed inside the middle frame 6. The shaft 41 of the rotor assembly 4 passes through the stator assembly 3 and is connected to the middle frame 6 through a bearing 42. One end of the shaft 41 of the rotor assembly 4 extends to the outside of the middle frame 6 and is connected to the impeller 2. The edge of the middle frame 6 facing the impeller 2 is provided with at least one annular groove 7 and a ring of retaining grooves 8, and the retaining grooves 8 communicate with the annular groove 7. Specifically, in this embodiment, a guide vane 9 is provided between the inner wall of the air duct 5 and the middle frame 6, and the distance from the blades of the impeller 2 to the guide vane 9 is 2.5-4.0 mm.

[0019] The main innovation of this embodiment is that by setting up an annular groove 7 and a ring of slots 8, the annular groove 7 can retain hair, allowing hair that is about to come into contact with the shaft 41 to be retained in the annular groove 7, thus achieving the function of hiding hair. At the same time, the slots 8 can pull and limit the hair that has been entangled with the shaft 41, and break the hair as it continues to rotate, thus achieving the function of cutting the hair. This hiding of hair can effectively reduce the problem of hair entanglement.

[0020] Furthermore, in order to initially prevent hair from entering the shaft 41, the inner end face of the impeller 2 in this embodiment is provided with a cover 10. The cover 10 covers the end face of the middle frame 6 and covers the bearing 42, the slot 8 and the annular groove 7. There is an movable gap 11 between the cover 10 and the side of the middle frame 6. This design relies on the cover 10 to form a bend, making it difficult for hair to enter, thereby further reducing the entanglement between hair and shaft 41.

[0021] During operation, the hair slides into the impeller 2. When the hair ends enter the air duct 5, the tail is still between the blades of the impeller 2. During high-speed rotation, the hair is initially broken. This cutting allows the hair to be blown out by the airflow through the guide vane 9 of the air duct 5 or accumulate in the cavity between the blades of the impeller 2 and the guide vane 9. The greater this distance, the more hair ends can be stored. However, some hair ends may gradually enter through the movement gap 11. Here, there are slots 8 and annular grooves 7, which prevent some of the hair from entering from being directly trapped. Inside the annular groove 7, even if the tip of a part of the hair comes into contact with and gets tangled with the shaft 41 (generally only long hair will get tangled, and the distance from the shaft 41 to the slot 8 is only about 2cm), the other part is still outside the cover opening 10. The middle part of the hair will be supported by the slot 8. When one end of the hair is wrapped around the shaft 41 and the other part is wrapped around the slot 8, the hair will be cut off when rotating. Once cut off, the hair will be prevented from continuing to wrap around the shaft 41. Because the cut hair is too short, it is easy to fall off the shaft 41 and stay in the annular groove 7.

[0022] Furthermore, the size of the active gap 11 in this embodiment is set to 0.1-0.8mm.

[0023] Furthermore, in this embodiment, the bearings 42 are connected in a single-sided configuration, meaning that all bearings 42 are located on one side of the shaft 41. To ensure the stability of the bearings 42 under this design, two bearings 42 are connected to one end of the shaft 41 of the rotor assembly 4 in this embodiment. A pre-compressed spring 43 is provided between the bearings 42. In this way, the compressed spring 43 continuously provides a pushing force to the two bearings 42, ensuring that both bearings 42 have a preload, thereby achieving a stable assembly.

[0024] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-speed motor that reduces hair tangling, characterized in that: The device includes a motor housing, an impeller, a stator assembly, and a rotor assembly. The motor housing has an air duct, and a middle frame is provided in the air duct. The stator assembly and the rotor assembly are installed inside the middle frame. The shaft of the rotor assembly passes through the stator assembly and is connected to the middle frame through a bearing. One end of the shaft of the rotor assembly extends to the outside of the middle frame and is connected to the impeller. The edge of the middle frame facing the impeller has at least one annular groove and a ring of retaining grooves, and the retaining grooves communicate with the annular grooves.

2. The high-speed motor that reduces hair tangling as described in claim 1, characterized in that: The inner end face of the impeller is provided with a cover, which covers the end face of the middle frame and covers the bearing, the slot and the annular groove. There is a movable gap between the cover and the side of the middle frame.

3. A high-speed motor as described in claim 2 that reduces hair tangling, characterized in that: The movable gap is 0.1-0.8 mm.

4. A high-speed motor as described in claim 3 that reduces hair tangling, characterized in that: A guide vane is provided between the inner wall of the air duct and the middle frame, and the distance from the impeller blade to the guide vane is 2.5-4.0 mm.

5. A high-speed motor as described in claim 4 that reduces hair tangling, characterized in that: The rotor assembly has two bearings connected to one end of its shaft, and a pre-compressed spring is installed between the bearings.

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