Silent sound wave sweeping motor

Abstract

The utility model relates to the technical field of motors, in particular to a mute sound wave sweeping motor, which comprises a shell, a rotor assembly arranged in the shell, a stator assembly, a rotating shaft which rotates coaxially with the rotor assembly and one end of which protrudes out of one end of the shell, and a rear cover arranged at the other end of the shell, a first bearing is connected between the other end of the rotating shaft and the rear cover; a limiting piece is coaxially and rotatably arranged at the other end of the rotating shaft, and a gasket is connected between the limiting piece and the bearing; the rear cover is provided with a limiting groove, the width of the limiting groove is smaller than the length of the limiting piece, and the limiting piece rotates in the limiting groove along with the rotating shaft at a limited rotating angle. The utility model aims to provide the mute sound wave sweeping motor, and the mute effect is better when the mute sound wave sweeping motor is used.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a silent sonic sweeping motor. Background Art

[0002] Electric toothbrushes are usually driven by motors to achieve the vibration of the toothbrush head to clean teeth. At present, some limited sweeping motors are used in electric toothbrushes, but the running noise of such motors on the market is relatively high, which affects the comfort of using electric toothbrushes. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a silent sonic sweeping motor, which has a better silent effect when used.

[0004] The utility model is realized by the following technical solutions:

[0005] A silent sonic sweeping motor comprises a shell, a rotor assembly and a stator assembly arranged in the shell, a rotating shaft coaxially rotating with the rotor assembly and with one end protruding out of one end of the shell, and a back cover installed at the other end of the shell, a first bearing being connected between the other end of the rotating shaft and the back cover; a limiting member being coaxially rotatingly arranged at the other end of the rotating shaft, a gasket being connected between the limiting member and the bearing; a limiting groove being arranged on the back cover, the width of the limiting groove being smaller than the length of the limiting member, and the limiting member rotating at a limited angle in the limiting groove along with the rotating shaft.

[0006] The rotor assembly includes a rotor core and two N-pole magnets and an S-pole magnet alternately embedded in the rotor core, and one end of the rotating shaft is arranged in the center hole of the rotor core.

[0007] Wherein, a second bearing is connected between one end of the rotating shaft and the housing.

[0008] Wherein, the first bearing and the second bearing are both ball bearings.

[0009] Wherein, a spring is further connected between the second bearing and the rotor assembly.

[0010] Wherein, the gasket is a silica gel or graphite structure.

[0011] Beneficial effects of the utility model:

[0012] The utility model discloses a silent sonic sweeping motor, in which a gasket is arranged between a limit piece and a bearing. When the limit piece is fixed to the rotating shaft, the limit piece simultaneously supports the gasket and the first bearing, so that the first bearing is better fixed to the rear cover, thereby improving the stability of the rotating shaft during rotation, effectively reducing the noise during operation of the motor, and improving the comfort of the electric toothbrush during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on the following drawings without creative efforts.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 It is an exploded view of the present utility model.

[0016] Figure 3 It is a sectional view of the present utility model.

[0017] Reference numerals

[0018] Housing - 100, Rear cover - 101, First bearing - 102, Limiting member - 103, Gasket - 104, Limiting groove - 105, Second bearing - 106, Spring - 107, Rotating shaft - 108,

[0019] Rotor assembly - 200, Rotor core - 201, N - pole magnet - 202, S - pole magnet - 203, Stator assembly - 204. Detailed embodiments

[0020] In order to make the above - mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] Electric toothbrushes are usually driven by motors to achieve the vibration of the toothbrush head to clean teeth. At present, some limited sweeping motors are used in electric toothbrushes, but the running noise of such motors on the market is relatively high, which affects the comfort of using electric toothbrushes.

[0024] In order to solve the above problems, this embodiment discloses a silent acoustic sweeping motor, the structure of which is as follows: Figures 1 to 3 As shown, the motor includes a housing 100, a rotor assembly 200 and a stator assembly 204 arranged in the housing 100, a rotating shaft 108 which rotates coaxially with the rotor assembly 200 and has one end protruding out of one end of the housing 100, and a back cover 101 installed at the other end of the housing 100, a first bearing 102 is connected between the other end of the rotating shaft 108 and the back cover 101; a limiting member 103 is coaxially rotated at the other end of the rotating shaft 108, and a gasket 104 is connected between the limiting member 103 and the bearing; a limiting groove 105 is provided on the back cover 101, the width of the limiting groove 105 is less than the length of the limiting member 103, and the limiting member 103 rotates within the limiting groove 105 at a limited angle along with the rotating shaft 108.

[0025] Specifically, a silent sonic sweeping motor of the present embodiment is provided with a gasket 104 between the limit member 103 and the bearing. When the limit member 103 is fixed to the rotating shaft 108, the limit member 103 simultaneously supports the gasket 104 and the first bearing 102, so that the first bearing 102 is better fixed to the rear cover 101, thereby improving the stability of the rotating shaft 108 during rotation, effectively reducing the sound during motor operation, and improving the comfort of the electric toothbrush during use.

[0026] Specifically, the rotor assembly 200 includes a rotor core 201 and two N-pole magnets 202 and an S-pole magnet 203 that are staggered and embedded in the rotor core 201. One end of the rotating shaft 108 is arranged in the center hole of the rotor core 201, so that the magnetic field polarities of the two stator poles on the same side and the magnetic field polarities of the rotor magnets on the same side always attract each other with different poles or repel each other with the same poles. By passing currents in different directions into the stator assembly 204 at a special time, magnetic fields in different directions are generated, thereby driving the rotor assembly 200 to rotate back and forth; in addition, the limit member 103 can also prevent the rotor assembly 200 from rotating excessively to a certain extent, and limit the rotation angle of the rotor assembly 200.

[0027] Additionally, a second bearing 106 is connected between one end of the rotating shaft 108 and the housing 100, and a spring 107 is further connected between the second bearing 106 and the rotor assembly 200, which can effectively improve the stability of the rotation of the rotating shaft 108. Preferably, both the first bearing 102 and the second bearing 106 are ball bearings.

[0028] Among them, the gasket 104 is made of silicone or graphite structure, which has a buffering and yielding effect when the rear cover 101 and the bearing are pressed onto the limiting piece of the rotating shaft 108.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A silent sonic sweeping motor, comprising: A housing, a rotor assembly, a stator assembly, a rotating shaft coaxially rotating with the rotor assembly and having one end protruding out of one end of the housing, and a rear cover mounted on the other end of the housing, wherein a first bearing is connected between the other end of the rotating shaft and the rear cover; It is characterized in that a limit piece is coaxially rotated at the other end of the rotating shaft, and a gasket is connected between the limit piece and the bearing; The rear cover is provided with a limiting groove, the width of the limiting groove is smaller than the length of the limiting member, and the limiting member rotates within a limited angle in the limiting groove along with the rotating shaft.

2. A silent sonic sweeping motor according to claim 1, characterized in that: The rotor assembly comprises a rotor core and two N-pole magnets and an S-pole magnet which are alternately embedded in the rotor core. One end of the rotating shaft is arranged in the central hole of the rotor core.

3. A silent sonic sweeping motor according to claim 1, characterized in that: A second bearing is connected between one end of the rotating shaft and the housing.

4. A silent sonic sweeping motor according to claim 3, characterized in that: The first bearing and the second bearing are both ball bearings.

5. A silent sonic sweeping motor according to claim 3, characterized in that: A spring is also connected between the second bearing and the rotor assembly.

6. A silent sonic sweeping motor according to claim 1, characterized in that: The gasket is made of silica gel or graphite.

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