Light servo motor and electric toothbrush

Abstract

The utility model provides a light servo motor. The light servo motor comprises a motor housing, an output shaft, a Hall sensing assembly, a stator assembly, a rotor and a bearing. The output shaft is fixedly arranged on the rotor in a penetrating mode, the stator assembly comprises a hollow part, and the rotor penetrates through the hollow part. The shell comprises a first shell and a second shell which are indirectly connected through the stator assembly, the first shell is close to one end of the extension direction of the output shaft, and the second shell is connected with the Hall sensing assembly. Compared with a traditional motor shell structure, the light servo motor provided by the utility model can reduce shell materials, reduce the weight and improve the heat dissipation performance of the motor on the premise that the structure is fixed.

Description

Technical Field

[0001] This utility model relates to the field of drive technology, and in particular to a lightweight servo motor and an electric toothbrush. Background Technology

[0002] With the development of technology, miniaturized, high-performance motors are increasingly used in portable devices. For example, in electric toothbrushes, the performance of the motor directly affects the product's usability and user experience. Traditional servo motors have complex structures and large sizes, making it difficult to meet the requirements of portable devices for lightness and compactness. Therefore, developing a lightweight servo motor has significant practical implications. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a brush handle device and an electric toothbrush with a more stable sealing effect.

[0004] In a first aspect, this utility model provides a lightweight servo motor, including a motor housing, an output shaft, a Hall sensor assembly, a stator assembly, a rotor, and bearings; the output shaft is fixedly mounted on the rotor, and the stator assembly includes a hollow portion through which the rotor passes. The housing includes a first housing and a second housing indirectly connected via the stator assembly, the first housing being located near the end extending from the output shaft, and the second housing being connected to the Hall sensor assembly.

[0005] Compared to traditional motor housing structures, the lightweight servo motor provided in this application can reduce housing material, lighten weight, and increase motor heat dissipation performance while maintaining a fixed structure.

[0006] Furthermore, a magnet mounting part is provided at the end of the output shaft of the lightweight servo motor near the Hall sensor component.

[0007] Furthermore, the first and / or second housings of the lightweight servo motor include a bearing mounting section.

[0008] Furthermore, the first and second housings of the lightweight servo motor include a fixing part.

[0009] Furthermore, the combined height of the fixing portion of the first and second housings of the lightweight servo motor is at least less than 1 / 2 of the height of the stator assembly.

[0010] Furthermore, the mounting portion of the first housing of the lightweight servo motor is at the same height as the mounting portion of the second housing.

[0011] Furthermore, the mounting portions of the first and second housings of the lightweight servo motor include positioning holes.

[0012] Furthermore, the second housing of the lightweight servo motor includes wiring through-holes.

[0013] Furthermore, the fixing part and bearing mounting part of the first housing of the lightweight servo motor are integrally formed, and / or the fixing part and bearing mounting part of the second housing are integrally formed.

[0014] Secondly, this utility model also provides an electric toothbrush, including the lightweight servo motor described in any of the above claims.

[0015] This invention provides a lightweight servo motor and an electric toothbrush. Compared to traditional servo motors, it adopts a lighter housing structure, resulting in a lighter overall weight of the servo motor, lower housing material costs, and better heat dissipation performance. The electric toothbrush using the lightweight servo motor provided in this application also achieves a correspondingly lighter design, allowing for a smaller toothbrush body and a lighter overall weight. The motor output performance is also improved, enhancing the user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded view of a lightweight servo motor according to an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional schematic diagram of a lightweight servo motor according to an embodiment of the present invention;

[0019] Figure 3 This is an exploded view of the first housing, the second housing, and the stator assembly according to an embodiment of the present invention. Figure 1 ;

[0020] Figure 4 This is an exploded view of the first housing, the second housing, and the stator assembly according to an embodiment of the present invention. Figure 2 ;

[0021] Figure 5 This is an enlarged schematic diagram of the first housing according to an embodiment of the present utility model;

[0022] Figure 6 This is an enlarged schematic diagram of the second housing according to an embodiment of the present utility model;

[0023] Figure 7 This is a schematic cross-sectional view of the assembly of the servo motor and the electric toothbrush in an embodiment of this utility model;

[0024] Figure 8This is a three-dimensional schematic diagram of the assembly of the servo motor and the electric toothbrush in an embodiment of this utility model.

[0025] In the figure, the following reference numerals are used: 100-servo motor; 10-servo motor; 11-electric toothbrush housing; 12-electric toothbrush bottom cover; 13-battery; 101-output shaft; 111-stator assembly; 112-rotor assembly; 121-first housing; 122-second housing; 131-first bearing; 132-second bearing; 141-Hall sensor assembly; 1211-first housing fixing part; 1212-first housing bearing mounting part; 1221-second housing fixing part; 1222-second housing bearing mounting part; 12111-first housing positioning hole; 12211-second housing positioning hole; 12212-second housing wiring through hole. Detailed Implementation

[0026] 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 only used to explain this utility model and are not intended to limit this utility model.

[0027] The components of the embodiments of this application described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] In the following text, the terms "comprising," "having," and their cognates, which may be used in various embodiments of this application, are intended only to indicate a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or adding the possibility of one or more combinations of the foregoing. Furthermore, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a rotating connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The following detailed description, with reference to the accompanying drawings, illustrates some embodiments of this lightweight servo motor and electric toothbrush. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] like Figures 1 to 2 As shown, this embodiment of the present invention provides a lightweight servo motor 100, including a bearing 101 extending out of the motor body, a stator assembly 111, and a rotor assembly 112 magnetically fixed to the hollow portion of the central axis of the stator assembly 111. The bearing 101 is disposed through the rotor assembly 112. The outer shell of the motor 100 includes a first housing 121 disposed at the upper end of the servo motor body and a second housing 122 disposed at the lower end of the motor body. Both the first housing 121 and the second housing 122 are made of metal and are fixedly connected to the upper and lower ends of the stator assembly 111, respectively, to achieve indirect connection between the two housings. In some other embodiments, the first housing 121 and the second housing 122 may also be made of a plastic material with high hardness. A first bearing 131 and a second bearing 132 are respectively disposed at the upper and lower ends of the rotor assembly 112 to assist the rotation of the rotor assembly 112 during motor operation. A Hall sensor assembly 141 is connected to the lower end of the second housing 122. A magnet mounting part is fixedly connected to one end of the bearing 101 near the Hall sensor assembly 141 for mounting a magnet. The magnet cooperates with the Hall sensor assembly 141 to realize specific control functions of the motor.

[0032] like Figures 3 to 4As shown, the first housing 121 includes a fixing part 1211 and a bearing mounting part 1212 for fixing the first bearing 131. The second housing 122 includes a fixing part 1221 and a bearing mounting part 1222 for fixing the second bearing 131. The fixing part and bearing mounting part of each housing are integrally formed and are both made of metal. The axial height of the fixing part is greater than the height of the bearing mounting part. In some embodiments, the fixing part and bearing mounting part can also be detachably configured, and both are made of metal or non-metal materials. Traditional motor housing structures are mostly integral metal housings that completely enclose the stator assembly. The lightweight servo motor housing provided in this application uses a first housing 121 and a second housing 122 to fix and wrap the two ends of the stator assembly 111, respectively. The sum of the axial heights of the fixing portions 1211 of the first housing 121 and 1221 of the second housing 122 is at least less than half the axial height of the stator assembly 111. That is, the middle portion of the outer ring of the stator assembly 111 is not wrapped, and at least half of the outer surface area of ​​the stator assembly 111 is exposed. Compared to traditional motor housing structures, the lightweight servo motor provided in this application, while achieving structural fixation, can reduce housing material, lighten weight, and increase the motor's heat dissipation performance. Preferably, the fixing portions 1211 of the first housing 121 and 1221 of the second housing 122 have equal heights, which helps to achieve weight balance at both ends of the motor 100 and avoids interference factors during motor operation vibration.

[0033] like Figures 5 to 6 As shown, the fixing part 1211 of the first housing 121 has a positioning hole 12111 on the side surface facing the bearing mounting part 1212. The fixing part 1221 of the second housing 122 has a positioning hole 12211 and a wiring through hole 12212 on the side surface facing the bearing mounting part 1222. The positioning holes 12111 and 12211 are used for limiting the motor during installation and production, and the through hole facilitates heat dissipation during motor operation. The wiring through hole 12212 is used to reserve space for the wires connecting the motor interior to the Hall sensor assembly 141.

[0034] The Hall sensor assembly 141 includes a main body, a circuit board, and an FPC flexible flat cable. The circuit board is placed inside the main body, and one end of the FPC flexible flat cable is connected to the circuit board, while the other end is used to connect to external electrical components.

[0035] like Figures 7 to 8As shown, this utility model also proposes an electric toothbrush, which includes the aforementioned lightweight servo motor 10, motor housing 11, housing bottom cover 12, battery 13, and circuit board. The electric toothbrush also includes a handle and brush head (not shown in the figure). The specific structure of the lightweight servo motor 10 is as described above. Since this electric toothbrush adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above structures, which will not be elaborated further here.

[0036] This invention provides a lightweight servo motor and an electric toothbrush. Compared to traditional servo motors, it adopts a lighter housing structure, resulting in a lighter overall weight of the servo motor, lower housing material costs, and better heat dissipation performance. The electric toothbrush using the lightweight servo motor provided in this application also achieves a correspondingly lighter design, allowing for a smaller toothbrush body and a lighter overall weight. The motor output performance is also improved, enhancing the user experience.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A light servo motor, comprising a motor housing, an output shaft, a Hall sensor assembly, a stator assembly, a rotor, and a bearing; the output shaft is fixedly arranged through the rotor, the stator assembly comprises a hollow portion, and the rotor penetrates through the hollow portion; characterized in that, The motor housing comprises a first housing and a second housing indirectly connected through the stator assembly, the first housing extending close to one end of the output shaft, and the second housing connected with the Hall sensor assembly.

2. The compact servo motor according to claim 1, wherein The output shaft is provided with a magnet mounting portion close to one end of the Hall sensor assembly.

3. The compact servomotor according to claim 1, characterized by The first housing and / or the second housing comprises a bearing mounting portion.

4. The compact servomotor according to claim 1, characterized by The first housing and the second housing comprise a fixing portion.

5. The compact servomotor according to claim 4, wherein The sum of the heights of the fixing portions of the first housing and the second housing is at least less than 1 / 2 of the height of the stator assembly.

6. The compact servomotor according to claim 5, wherein The fixing portion of the first housing is equal in height to the fixing portion of the second housing.

7. The compact servomotor according to claim 4, wherein The fixing portions of the first housing and the second housing comprise positioning holes.

8. A compact servo motor according to any one of claims 1-7, characterized in that The second housing comprises a wire through hole.

9. A compact servo motor according to any one of claims 1-7, characterized in that The fixing portion and the bearing mounting portion of the first housing are integrally formed, and / or the fixing portion and the bearing mounting portion of the second housing are integrally formed.

10. An electric toothbrush comprising a handle and a brush head, characterized in that A light-weight servo motor comprising any one of claims 1-9.

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