Assembly part of motor shaft

Abstract

The utility model provides an assembly part of a motor shaft. A connecting cavity connected with the motor shaft is arranged in the assembly part of the motor shaft. The connecting cavity is divided into a sound insulation hole and a positioning hole, and the radius of the sound insulation hole is smaller than that of the positioning hole; the inner wall of one side of the sound insulation hole is linearly communicated with the inner wall of one side of the positioning hole, a first positioning point is arranged on the top of the inner wall, linearly communicated with the positioning hole, of the sound insulation hole, and the inner wall of the other side of the sound insulation hole is connected with the inner wall of the other side of the positioning hole in a broken line mode. And the sound insulation holes and the positioning holes form second positioning points. The sound insulation assembly is simple in structure, convenient to disassemble and assemble and easy to carry, meanwhile, the assembly part and the motor shaft can form two different sound insulation cavities, noise generated by the motor shaft is isolated through the sound insulation cavities, disturbance of the noise to a user is reduced, and the use experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to an assembly part of a motor shaft. Background Art

[0002] An electric toothbrush makes the brush head generate high-frequency vibration through the rapid rotation or vibration of the motor core, instantly decomposes toothpaste into fine foam, and deeply cleans the tooth gaps. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity and has a massage effect on the gum tissue.

[0003] In order to improve the stability of rotation, an electric motor is generally installed at the handle of the electric toothbrush, and the motor shaft of the electric motor passes through the handle and is clamped and fixed at the brush head, so that the motor shaft can be connected to the brush head to drive the brush to rotate.

[0004] However, since the motor shaft is clamped and fixed at the brush head, it is difficult to disassemble and assemble the motor shaft and the brush. After using for a period of time, the motor shaft and the brush head are prone to wear, thereby reducing the rotation speed, and at the same time, it is easy to cause damage to the motor and reduce the service life of the electric toothbrush. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an assembly part of a motor shaft, which solves the existing problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An assembly part of a motor shaft, a connection cavity connected to the motor shaft is arranged inside the motor shaft assembly part;

[0008] The connection cavity is divided into a sound insulation hole and a positioning hole, and the radius of the sound insulation hole is smaller than the radius of the positioning hole;

[0009] One side inner wall of the sound insulation hole is linearly communicated with one side inner wall of the positioning hole, and a first positioning point is arranged at the top of the inner wall where the sound insulation hole is linearly communicated with the positioning hole. The inner wall on the other side of the sound insulation hole is connected with the inner wall on the other side of the positioning hole in a broken line manner, so that a second positioning point is formed between the sound insulation hole and the positioning hole.

[0010] Further, the first positioning point faces the center of the sound insulation hole, and there is a gap with a distance of h between the first positioning point and the top of the sound insulation hole, so that a first sound insulation chamber is formed in the space between the top of the motor shaft and the top of the sound insulation hole.

[0011] Further, the second positioning point faces the center of the positioning hole, and there is a gap with a distance of k between the motor shaft and the second positioning point, so that a second sound insulation chamber is formed in the space between the motor shaft and the second positioning point.

[0012] Further, the second positioning point is horizontally inclined downward with the connection end to the inner wall of the sound insulation hole as the fulcrum, and the formed inclination angle is α, and the angle range of α is 20-70 degrees.

[0013] Further, the preferred angle range of α is 30-60 degrees.

[0014] Further, the first positioning point is horizontally inclined downward with the connection end to the inner wall of the sound insulation hole as the fulcrum, and the formed inclination angle is β, and the angle range of β is 20-70 degrees.

[0015] Further, the angle range of β is 30-60 degrees.

[0016] Further, a positioning member is provided at the top of the fitting of the motor shaft, and the positioning member is fixedly connected to the brush head of the electric toothbrush.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] In the embodiment of the present application, a connection cavity connected to the motor shaft is provided inside the fitting of the motor shaft; the connection cavity is divided into a sound insulation hole and a positioning hole, and the radius of the sound insulation hole is smaller than the radius of the positioning hole; one inner wall of the sound insulation hole is linearly communicated with one inner wall of the positioning hole, and a first positioning point is provided at the top of the inner wall where the sound insulation hole is linearly communicated with the positioning hole, and the other inner wall of the sound insulation hole is connected to the other inner wall of the positioning hole in a broken line manner, so that a second positioning point is formed between the sound insulation hole and the positioning hole. The structure of the present utility model is simple, convenient to disassemble and assemble, and easy to carry. At the same time, the fitting can form two different sound insulation chambers with the motor shaft, and the noise generated by the motor shaft is isolated through the sound insulation chambers, reducing the noise interference to the user and improving the user experience. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a structural schematic diagram of a fitting of a motor shaft proposed by the present utility model;

[0021] In the figure: 1. Connection cavity; 2. First sound insulation chamber; 3. Third sound insulation chamber. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Referring to Figure 1 , a structural schematic diagram of an assembly of a motor shaft of the present utility model is shown. Specifically, a connection cavity 1 connected to the motor shaft is provided inside the motor shaft assembly;

[0024] The connection cavity 1 is divided into a sound insulation hole and a positioning hole, and the radius of the sound insulation hole is smaller than the radius of the positioning hole;

[0025] One inner wall of the sound insulation hole is linearly connected to one inner wall of the positioning hole, and a first positioning point is provided at the top of the inner wall where the sound insulation hole is linearly connected to the positioning hole. The inner wall on the other side of the sound insulation hole is connected to the inner wall on the other side of the positioning hole in a broken line, so that a second positioning point is formed between the sound insulation hole and the positioning hole.

[0026] In the embodiment of the present application, a connection cavity connected to the motor shaft is provided inside the motor shaft assembly; the connection cavity is divided into a sound insulation hole and a positioning hole, the radius of the sound insulation hole is smaller than the radius of the positioning hole; one inner wall of the sound insulation hole is linearly connected to one inner wall of the positioning hole, and a first positioning point is provided at the top of the inner wall where the sound insulation hole is linearly connected to the positioning hole. The inner wall on the other side of the sound insulation hole is connected to the inner wall on the other side of the positioning hole in a broken line, so that a second positioning point is formed between the sound insulation hole and the positioning hole. The structure of the present utility model is simple, easy to disassemble and assemble, and easy to carry. At the same time, the assembly can form two different sound insulation chambers with the motor shaft, and the noise generated by the motor shaft is isolated through the sound insulation chambers, reducing the noise interference to the user and improving the user experience.

[0027] Next, the assembly of the motor shaft in this exemplary embodiment will be further described.

[0028] During installation and fixation, the assembly can be sleeved on the motor shaft, so that the motor shaft can pass through the sound insulation hole and the positioning hole respectively. Due to the presence of the first positioning point and the second positioning point, the first positioning point can hold the motor shaft and fix the motor shaft at the place where it touches the first positioning point.

[0029] Since the motor shaft generates noise during rotation, in order to reduce the noise generated by the motor shaft, the first positioning point faces the center of the sound insulation hole, and there is a gap of distance h between the first positioning point and the top of the sound insulation hole, so that a first sound insulation chamber 2 is formed in the space between the top of the motor shaft and the top of the sound insulation hole.

[0030] When the motor shaft is rotating, the first sound insulation chamber 2 can isolate the noise generated by the motor shaft and prevent the noise from passing through the brush head, thereby reducing the annoyance of the noise to the user.

[0031] In order to further absorb the noise generated by the motor shaft, refer to Figure 1 , the second positioning point faces the center of the positioning hole, and there is a gap of distance k between the motor shaft and the second positioning point, so that a second sound insulation chamber 3 is formed in the space between the motor shaft and the second positioning point.

[0032] The first sound insulation chamber 2 and the second sound insulation chamber 3 can respectively absorb the noise generated by the motor shaft at the top and on the side, improving the noise reduction effect.

[0033] In order to increase the volume of the second sound insulation chamber 3, refer to Figure 1 , in this embodiment, the second positioning point is horizontally inclined downward with the connection end to the inner wall of the sound insulation hole as the fulcrum, and the inclined angle is α, and the angle range of α is 20 - 70 degrees.

[0034] Preferably, the preferred angle range of α is 30 - 60 degrees.

[0035] In an alternative embodiment, in order to increase the volume of the first sound insulation chamber 2, the first positioning point is horizontally inclined downward with the connection end to the inner wall of the sound insulation hole as the fulcrum, and the inclined angle is β, and the angle range of β is 20 - 70 degrees.

[0036] Preferably, the angle range of β is 30 - 60 degrees.

[0037] In order to firmly fix the assembly of the motor shaft to the brush head of the electric toothbrush and at the same time facilitate the user to disassemble and assemble, a positioning member is provided at the bottom of the assembly of the motor shaft, and the positioning member is fixedly connected to the brush head of the electric toothbrush.

[0038] During disassembly and assembly, the assembly of the motor shaft can be installed at the brush head, and then the motor shaft is inserted into the assembly to complete the installation. This method can not only separate the brush head from the brush handle with the motor shaft installed, facilitating the user to use and carry, but also facilitating the manufacturer to produce and sell.

[0039] In an embodiment of the present utility model, an assembly for a motor shaft is disclosed. The structure of the present utility model is simple, convenient for disassembly and assembly, and easy to carry. At the same time, the assembly can form two different sound insulation chambers with the motor shaft, and the noise generated by the motor shaft is isolated through the sound insulation chambers, reducing the interference of the noise to the user and improving the user experience.

[0040] In the description of this specification, the description with reference to terms such as "an embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0041] The above has introduced in detail an assembly for a motor shaft provided by the present utility model. Specific embodiments are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A motor shaft assembly, characterized in that: The motor shaft assembly is provided with a connecting cavity (1) connected to the motor shaft inside; The connecting cavity (1) is divided into a sound insulation hole and a positioning hole, and the radius of the sound insulation hole is smaller than the radius of the positioning hole; The inner wall on one side of the sound insulation hole is connected in a straight line with the inner wall on one side of the positioning hole, and a first positioning point is provided on the top of the inner wall where the sound insulation hole and the positioning hole are connected in a straight line, and the inner wall on the other side of the sound insulation hole is connected in a broken line with the inner wall on the other side of the positioning hole, so that the sound insulation hole and the positioning hole form a second positioning point.

2. The motor shaft assembly according to claim 1, characterized in that: The first positioning point faces the center of the sound insulation hole, and a distance h is set between the first positioning point and the top of the sound insulation hole, so that the top of the motor shaft and the top of the sound insulation hole are separated by a space to form a first sound insulation chamber (2).

3. The motor shaft assembly according to claim 1, characterized in that: The second positioning point faces the center of the positioning hole, and a distance k is set between the motor shaft and the second positioning point, so that the space between the motor shaft and the second positioning point forms a second soundproof chamber (3).

4. The motor shaft assembly according to claim 1, characterized in that: The second positioning point is tilted downward horizontally with the connection end with the inner wall of the sound insulation hole as a fulcrum, and the angle formed by the tilt is α, and the angle range of α is 20-70 degrees.

5. The motor shaft assembly according to claim 4, characterized in that: The angle range of α is 30-60 degrees.

6. The motor shaft assembly according to claim 1, characterized in that: The first positioning point is tilted downward horizontally with the connection end with the inner wall of the sound insulation hole as a fulcrum, and the angle formed by the tilt is β, and the angle range of β is 20-70 degrees.

7. The motor shaft assembly according to claim 6, characterized in that: The angle range of β is 30-60 degrees.

8. The motor shaft assembly according to claim 1, characterized in that: A positioning piece is provided at the bottom of the assembly part of the motor shaft, and the positioning piece is fixedly connected to the brush head of the electric toothbrush.

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