High-speed motor

Abstract

The present application provides a high-speed motor, comprising: a cylinder, comprising an outer ring portion, an inner ring portion, and a plurality of connecting leaves connecting the outer ring portion and the inner ring portion, a base plate formed in the inner ring portion, a shaft cylinder protruding and extending backward from the base plate, a bearing mounting structure provided in the shaft cylinder, the bearing mounting structure comprising a first bearing chamber and a second bearing chamber; a stator assembly and a rotor assembly, wherein the stator assembly, the rotor assembly and the shaft cylinder are nested and fixed; wherein the rotor assembly comprises a rotating shaft, and a first bearing and a second bearing arranged radially outside the rotating shaft, the rotating shaft extends into the shaft cylinder, the first bearing is accommodated in the first bearing chamber, and the second bearing is accommodated in the second bearing chamber, so as to fix the rotating shaft and the shaft cylinder. By arranging the first bearing chamber and the second bearing chamber in the bearing mounting structure formed by integral molding, the concentricity of the first bearing and the second bearing is ensured, so that the high-speed motor will not be eccentric when running at high speed.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a high-speed motor with good vibration reduction effect. Background Art

[0002] The motor, also known as the motor, mainly converts the received electricity into mechanical energy, and then uses the mechanical energy to generate kinetic energy, which can then drive other devices. This also makes the motor widely used in various products, such as electric vehicles, electric fans, water pumps, etc. At present, the existing high-speed motors on the market have very high working speeds (up to 60,000 rpm or more), but the noise and vibration problems are more prominent. One of the reasons for the noise and vibration problems is the imbalance caused by the eccentricity between the bearings in the motor, and the long-term eccentric operation between the parts is easy to damage the motor. Summary of the invention

[0003] In view of this, the present application provides a high-speed motor, which ensures the concentricity of the first bearing and the second bearing by setting a first bearing chamber and a second bearing chamber in a bearing mounting structure formed by integral molding, so that the high-speed motor will not be eccentric when running at high speed.

[0004] The present application provides a high-speed motor, comprising: a cylinder, comprising an outer ring portion, an inner ring portion, and a plurality of connecting leaves connecting the outer ring portion and the inner ring portion, a base plate formed in the inner ring portion, a shaft cylinder protruding and extending backward from the base plate, an integrally formed bearing mounting structure being provided in the shaft cylinder, the bearing mounting structure comprising a first bearing chamber and a second bearing chamber; a stator assembly and a rotor assembly, wherein the stator assembly, the rotor assembly and the shaft cylinder are nested and fixed; wherein the rotor assembly comprises a rotating shaft, and a first bearing and a second bearing arranged radially outside the rotating shaft, the rotating shaft extends into the shaft cylinder, the first bearing is accommodated in the first bearing chamber, and the second bearing is accommodated in the second bearing chamber, so as to fix the rotating shaft and the shaft cylinder.

[0005] Furthermore, a first step portion is formed on the outer side surface of the shaft cylinder, and the stator assembly is arranged outside the shaft cylinder and abuts against the first step portion forward.

[0006] Furthermore, the bearing mounting structure is integrally formed in the shaft cylinder, the first bearing chamber is located in front of the second bearing chamber, the rear end of the first bearing chamber forms a second step portion, and the rear end of the second bearing chamber forms a third step portion.

[0007] Furthermore, the diameter of the first bearing chamber is larger than the diameter of the second bearing chamber, the outer diameter of the first bearing is larger than the outer diameter of the second bearing, and after the second bearing enters from the front end of the shaft tube and is accommodated in the second bearing chamber, the first bearing enters from the front end of the shaft tube and is accommodated in the first bearing chamber; a buffer pad is provided between the first bearing and the second step portion, and / or a buffer pad is provided between the second bearing and the third step portion.

[0008] Furthermore, the diameter of the first bearing chamber is 6.8-7.2 mm, and the diameter of the second bearing chamber is 4.8-5.2 mm.

[0009] Furthermore, the bearing installation structure also includes a transition section arranged between the first bearing chamber and the second bearing chamber, and the diameter of the transition section decreases from front to back.

[0010] Furthermore, the transition section accommodates an isolating member, and the isolating member is used to isolate and position the first bearing and the second bearing; the length of the isolating member is 5.65-6.05 mm.

[0011] Furthermore, the rotating shaft is inserted into the shaft tube and passes through the second bearing and the first bearing. A slot is formed at the front end of the rotating shaft, a limit member is clamped in the slot, and a buffer member is provided between the limit member and the first bearing.

[0012] Furthermore, the rotor assembly also includes a casing and a magnetic ring arranged radially outside the rotating shaft, the magnetic ring is arranged radially outside the stator assembly, the casing opening faces forward, and the side wall of the casing is arranged radially outside the magnetic ring; it also includes fan blades, the fan blades are fixed to the rear end of the rotating shaft, and the fan blades and the casing are arranged closely.

[0013] Furthermore, it also includes a driving plate, which is arranged at the front end of the inner ring portion, and the driving plate is electrically connected to the stator assembly and drives the rotor assembly and the fan blades to rotate.

[0014] Compared with the prior art, the high-speed motor of the present application has the following beneficial effects: by arranging the first bearing chamber and the second bearing chamber in the bearing mounting structure formed by one-piece molding, the concentricity of the first bearing and the second bearing is ensured, so that the high-speed motor will not be eccentric when running at high speed, thereby ensuring that the high-speed motor can rotate smoothly for a long time and effectively reducing the noise and vibration of the high-speed motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional diagram of the high-speed motor of the present application;

[0016] Figure 2It is a three-dimensional exploded view of the high-speed motor of the present application;

[0017] Figure 3 is a sectional exploded view of the high-speed motor of the present application;

[0018] Figure 4 is a cross-sectional view of the high-speed motor of the present application;

[0019] Figure 5 It is a cross-sectional view of the high-speed motor cylinder of the present application when it is removed. DETAILED DESCRIPTION

[0020] In order to facilitate a better understanding of the purpose, structure, features, and functions of the present application, the present application is further described in conjunction with the accompanying drawings and specific implementation methods.

[0021] It should be noted that when an element is considered to be “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0022] In this application, descriptions such as “first”, “second”, etc. are only used for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0023] In the description of the present application, the terms "front", "back", "left", "right", "up", "down", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0024] In one embodiment, Figure 1 and Figure 2 The high-speed motor of the present application is shown in FIG. The high-speed motor comprises a barrel 1, a stator assembly 2 and a rotor assembly. The barrel 1 comprises an outer ring portion 11, an inner ring portion 12, and a plurality of connecting blades 13 connecting the outer ring portion 11 and the inner ring portion 12.

[0025] In one embodiment, Figures 3 to 5As shown, a base plate 14 is formed in the inner ring portion 12, and a shaft cylinder 15 protrudes backward from the base plate 14. An integral bearing mounting structure is provided in the shaft cylinder 15, and the bearing mounting structure includes a first bearing chamber 151 and a second bearing chamber 152. The stator assembly 2, the rotor assembly and the shaft cylinder 15 are nested and fixed. The rotor assembly includes a rotating shaft 31, and a first bearing 32 and a second bearing 33 arranged radially outside the rotating shaft 31. The rotating shaft 31 extends into the shaft cylinder 15, the first bearing 32 is accommodated in the first bearing chamber 151, and the second bearing 33 is accommodated in the second bearing chamber 152, so as to fix the rotating shaft 31 and the shaft cylinder 15.

[0026] In one embodiment, Figures 3 to 5 As shown, the outer side of the shaft cylinder 15 is formed with a first step portion 153, and the stator assembly 2 is arranged outside the shaft cylinder 15 and abuts against the first step portion 153. By providing the first step portion 153, the stator assembly 2 is nested and positioned radially outside the shaft cylinder 15.

[0027] In one embodiment, Figures 3 to 5 As shown, the bearing mounting structure is integrally formed in the shaft cylinder 15. That is to say, in this embodiment, the first bearing chamber 151 and the second bearing chamber 152 are directly integrally formed by the shaft cylinder 15, and the axis of the first bearing chamber 151, the axis of the second bearing chamber 152 and the axis of the shaft cylinder 15 coincide, which not only ensures the concentricity of the first bearing 32 and the second bearing 33, but also ensures the concentricity of the first bearing 32, the second bearing 33 and the shaft cylinder 15. Of course, in other embodiments, the bearing mounting structure can be integrally formed separately and then embedded in the shaft cylinder 15, which can also ensure the concentricity between the first bearing 32 and the second bearing 33. The first bearing chamber 151 is located in front of the second bearing chamber 152, and the rear end of the first bearing chamber 151 forms a second step portion 154, and the rear end of the second bearing chamber 152 forms a third step portion 155. The step portion is formed at the rear end of the bearing chamber to limit the backward movement of the bearing and fix the bearing.

[0028] In one embodiment, Figures 3 to 5As shown, the diameter of the first bearing chamber 151 is larger than the diameter of the second bearing chamber 152, and the outer diameter of the first bearing 32 is larger than the outer diameter of the second bearing 33. Therefore, after the second bearing 33 first enters from the front end of the shaft cylinder 15 and is accommodated in the second bearing chamber 152, the first bearing 32 enters from the front end of the shaft cylinder 15 and is accommodated in the first bearing chamber 151. In this embodiment, a buffer pad is provided between the first bearing 32 and the second step portion 154 to buffer the vibration between the first bearing 32 and the second step portion 154. In addition, in other embodiments, the buffer pad may also be provided between the second bearing 33 and the third step portion 155. Alternatively, the buffer pad is not provided between the first bearing 32 and the second step portion 154, and the buffer pad is provided between the second bearing 33 and the third step portion 155.

[0029] In one embodiment, Figures 3 to 5 As shown, the diameter of the first bearing chamber 151 is 5.8-7.2 mm, and the diameter of the second bearing chamber 152 is 4.8-5.2 mm. A buffer sleeve may be provided outside the first bearing 32 and the second bearing 33, and the buffer sleeve may further alleviate the vibration of the first bearing 32 and the second bearing 33, thereby further reducing noise. Of course, the buffer sleeve may not be provided outside the first bearing 32 and the second bearing 33.

[0030] In one embodiment, Figures 3 to 5 As shown, the bearing installation structure further includes a transition section 156 disposed between the first bearing chamber 151 and the second bearing chamber 152, and the diameter of the transition section 156 decreases from front to back. The transition section 156 decreases from front to back, which facilitates the second bearing 33 to move backward from the front end of the bearing installation structure into the second bearing chamber 152. The transition section 156 accommodates an isolating member 6, and the isolating member 6 is used to isolate and position the first bearing 32 and the second bearing 33 to prevent the first bearing 32 and the rotating shaft 31, and the second bearing 33 and the rotating shaft 31 from relative displacement. The length of the isolating member 6 is 5.65-6.05 mm.

[0031] In one embodiment, Figures 3 to 5 As shown, the rotating shaft 31 is inserted into the shaft cylinder 15 and passes through the second bearing 33 and the first bearing 32. A slot is formed at the front end of the rotating shaft 31. A buffer 8 is provided between the stopper 7 and the first bearing 32. The stopper 7 and the buffer 8 limit the relative displacement between the first bearing 32 and the rotating shaft 31.

[0032] In one embodiment, Figures 3 to 5As shown, the rotor assembly also includes a housing 34 and a magnetic ring 35 arranged on the radial outer side of the rotating shaft 31, and the magnetic ring 35 is arranged on the radial outer side of the stator assembly 2. The housing 34 opens forward, and the side wall of the housing 34 is arranged on the radial outer side of the magnetic ring 35. The high-speed motor also includes a fan blade 4 and a drive plate 5. The fan blade 4 is fixed to the rear end of the rotating shaft 31, and the fan blade 4 and the housing 34 are arranged in close proximity. The drive plate 5 is arranged at the front end of the inner ring portion 12, and the drive plate 5 is electrically connected to the stator assembly 2, and drives the rotor assembly and the fan blade 4 to rotate.

[0033] In one embodiment, Figures 3 to 5 As shown, an elastic member is further provided between the rear wall of the housing 34 and the second bearing 33 to further limit the relative displacement between the second bearing 33 and the rotating shaft 31, and to buffer and reduce the vibration of the second bearing 33. The front and rear ends of the first bearing 32 and the front and rear ends of the second bearing 33 are both supported, and the pre-pressure between the first bearing 32, the second bearing 33 and the whole high-speed motor is balanced, and the vibration of the first bearing 32 and the second bearing 33 is buffered and reduced, thereby effectively reducing the noise of the high-speed motor.

[0034] It should be understood that the isolating member 6, the buffer member 8, the buffer pad and the elastic member in the high-speed motor described in the present application can all be elastic, but the specific material and form can be selected from existing elastic materials, for example, the isolating member 6, the buffer member 8 and the elastic member can all be silicone materials; the isolating member 6 and the buffer member 8 can be silicone materials, and the elastic member is an elastic metal material. The specific elastic material is not limited to the above examples, as long as it is elastic and can provide a buffering and shock absorbing effect.

[0035] In one embodiment, the high-speed motor is used in a portable fan, which can be a handheld fan, a neck hanging fan, a clip fan, a hanging fan, etc. Of course, the high-speed motor can also be used in other devices, not limited to the examples.

[0036] The above detailed description is only an explanation of the preferred embodiment of the present application, and does not limit the patent scope of the present application. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. A high-speed motor, characterized in that: include: The cylinder body comprises an outer ring portion, an inner ring portion, and a plurality of connecting leaves connecting the outer ring portion and the inner ring portion, wherein a base plate is formed in the inner ring portion, and a shaft cylinder protrudes and extends backward from the base plate, wherein an integrally formed bearing mounting structure is arranged in the shaft cylinder, and the bearing mounting structure comprises a first bearing chamber and a second bearing chamber; A stator assembly and a rotor assembly, wherein the stator assembly, the rotor assembly and the shaft cylinder are nested and fixed; Wherein, the rotor assembly includes a rotating shaft, and a first bearing and a second bearing arranged radially outside the rotating shaft, the rotating shaft extends into the shaft cylinder, the first bearing is accommodated in the first bearing chamber, and the second bearing is accommodated in the second bearing chamber to fix the rotating shaft and the shaft cylinder.

2. The high-speed motor according to claim 1, characterized in that: A first step portion is formed on the outer side surface of the shaft cylinder, and the stator assembly is arranged outside the shaft cylinder and abuts against the first step portion forward.

3. The high-speed motor according to claim 2, characterized in that: The bearing mounting structure is integrally formed in the shaft cylinder, the first bearing chamber is located in front of the second bearing chamber, the rear end of the first bearing chamber forms a second step portion, and the rear end of the second bearing chamber forms a third step portion.

4. The high-speed motor according to claim 3, characterized in that: The diameter of the first bearing chamber is larger than the diameter of the second bearing chamber, the outer diameter of the first bearing is larger than the outer diameter of the second bearing, after the second bearing enters from the front end of the shaft tube and is accommodated in the second bearing chamber, the first bearing enters from the front end of the shaft tube and is accommodated in the first bearing chamber; a buffer pad is provided between the first bearing and the second step portion, and / or a buffer pad is provided between the second bearing and the third step portion.

5. The high-speed motor according to claim 4, characterized in that: The diameter of the first bearing chamber is 6.8-7.2 mm, and the diameter of the second bearing chamber is 4.8-5.2 mm.

6. The high-speed motor according to claim 3, characterized in that: The bearing installation structure further includes a transition section disposed between the first bearing chamber and the second bearing chamber, wherein the diameter of the transition section decreases from front to back.

7. The high-speed motor according to claim 6, characterized in that: The transition section accommodates an isolating member, and the isolating member is used to isolate and position the first bearing and the second bearing; the length of the isolating member is 5.65-6.05 mm.

8. The high-speed motor according to claim 3, characterized in that: The rotating shaft is inserted into the shaft tube and passes through the second bearing and the first bearing. A slot is formed at the front end of the rotating shaft. A limiter is clamped in the slot. A buffer is provided between the limiter and the first bearing.

9. The high-speed motor according to claim 1, characterized in that: The rotor assembly also includes a casing and a magnetic ring arranged radially outside the rotating shaft, the magnetic ring is arranged radially outside the stator assembly, the casing opening faces forward, and the side wall of the casing is arranged radially outside the magnetic ring; it also includes fan blades, the fan blades are fixed to the rear end of the rotating shaft, and the fan blades and the casing are arranged in close proximity.

10. The high-speed motor according to claim 9, characterized in that: It also includes a driving plate, which is arranged at the front end of the inner ring portion. The driving plate is electrically connected to the stator assembly and drives the rotor assembly and the fan blades to rotate.

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