Motor assembly of electric toothbrush and electric toothbrush
By designing the limit structure of the fixed end plate and anti-rotating part in the motor assembly of the electric toothbrush, the problem of loose motor is solved, the installation accuracy and strength of the motor are improved, and the structural stability of the toothbrush is ensured.
Patent Information
- Application Number
- CN202422144467.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The motor of the electric toothbrush is likely to loosen relative to the motor bracket after long-term use, resulting in excessive vibration amplitude and reduced movement accuracy, which in turn affects the structural stability of the toothbrush.
A motor assembly of an electric toothbrush is designed, including a motor bracket and a motor body. The upper end surface of the motor body is fixed with the connection end plate, and the end plate and the motor bracket are fixed by a connecting piece; the lower peripheral wall of the motor body is matched with the upper circumferential limit through the anti-rotation part to achieve double limit rotation and prevent the motor body from loosening relative to the motor bracket.
By increasing the connection area and connection strength between the motor and the motor bracket, the installation accuracy and strength of the motor are improved, preventing the motor from loosening and ensuring the structural stability of the toothbrush.
Smart Images
Figure CN223039754U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electric toothbrushes, and particularly to a motor assembly of an electric toothbrush and an electric toothbrush. Background Art
[0002] Currently, the motor of an electric toothbrush is directly clamped and fixed within a motor bracket. Since the motor vibrates for a long time during the use of the electric toothbrush, this installation method makes the motor prone to looseness. On the one hand, it causes the vibration amplitude of the motor to be too large, and on the other hand, it cannot guarantee the movement accuracy of the output shaft of the motor, which is not conducive to ensuring the overall structural stability of the toothbrush. Summary of the Utility Model
[0003] In view of the above problems, the present utility model provides a motor assembly of an electric toothbrush, aiming to solve the technical problem that the motor is prone to loosen relative to the motor bracket after long-term use.
[0004] To achieve the above object, the motor assembly of the electric toothbrush provided by the present utility model includes a motor bracket and a motor body;
[0005] The motor bracket encloses to form a motor installation cavity;
[0006] The motor body is accommodated in the motor installation cavity; an end plate is fixedly connected to the upper end surface of the motor body, an anti-rotation portion is provided on the circumferential side wall at the lower end of the motor body, and a mating portion corresponding to the anti-rotation portion is provided in the motor installation cavity; the end plate and the motor bracket are fixed by a connecting member, and the anti-rotation portion and the mating portion are in circumferential limiting cooperation around the motor body.
[0007] In one embodiment, the end plate is welded to the upper end surface of the motor body, a positioning convex column is integrally formed on the upper surface of the end plate, and the motor bracket is provided with a positioning groove that cooperates with the positioning convex column.
[0008] In one embodiment, the motor bracket includes a first half-shell and a second half-shell that are spliced with each other in the thickness direction, the first half-shell and the second half-shell enclose to form the motor installation cavity, and the positioning groove is provided at the splicing position of the first half-shell and the second half-shell.
[0009] In one embodiment, at least one mounting hole is respectively opened on the upper surfaces of the first half-shell and the second half-shell corresponding to the upper surface of the end plate, threaded holes corresponding to the mounting holes are provided on the end plate, and the connecting member passes through the mounting hole and is threadedly connected to the threaded hole.
[0010] In one embodiment, the mating portion is a mating groove opened at the splicing position of the first half-shell and the second half-shell, and the anti-rotation portion is a rib provided on the motor body and extending in the up and down direction.
[0011] In one embodiment, a positioning rib extending in the up-down direction is provided on the splicing surface of the first half shell, and a slot adapted to be fitted with the positioning rib is provided on the splicing surface of the second half shell.
[0012] In one embodiment, an engaging rib corresponding to the positioning rib is provided on the outer peripheral wall of the first half shell. The engaging rib is used to be embedded in the inner wall of the brush handle housing and is integrally formed with the positioning rib.
[0013] In one embodiment, a plurality of limiting grooves are formed on the inner wall surface of the motor bracket; a buffer sleeve is sleeved on the outer periphery of the motor body. A plurality of hollow holes are formed in the buffer sleeve. The buffer sleeve is clamped between the motor body and the wall of the motor installation cavity so that part of the buffer sleeve is received in the limiting grooves.
[0014] In one embodiment, the motor body includes an output shaft, a motor housing and an end housing; the end housing is fixedly connected to the lower end of the motor housing. The upper end of the output shaft extends out of the upper end of the motor housing, and the lower end of the output shaft extends into the end housing; the anti-rotation portion is provided on the end housing, and the end plate is fixedly connected to the upper end surface of the motor housing.
[0015] The present utility model further provides an electric toothbrush, which includes a toothbrush head, a brush handle housing and a motor assembly of the electric toothbrush as described in any one of the above embodiments. The motor assembly of the electric toothbrush is installed in the brush handle housing, and the output shaft of the motor body of the motor assembly extends out of the brush handle housing and is connected to the toothbrush head.
[0016] In the motor assembly of the electric toothbrush of the present utility model, the upper end surface of the motor body is fixedly connected to the end plate, and the end plate and the motor bracket are fixed through a connecting member; in this way, the connection area and connection strength between the motor and the motor bracket can be increased, effectively avoiding the deformation of the connection of the motor housing, and further improving the installation accuracy and strength of the motor and the motor bracket. At the same time, the outer peripheral wall of the lower end of the motor body is in circumferential limiting cooperation with the matching portion of the motor bracket through the anti-rotation portion, effectively preventing the lower end of the motor body from rotating relative to the motor bracket. Therefore, both the upper end and the lower end of the motor body are provided with limiting connection structures to cooperate with the motor bracket, realizing double-limiting rotation, effectively avoiding the loosening of the motor body relative to the motor bracket, and being able to ensure the structural stability of the overall electric toothbrush. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 Shows a schematic structural diagram of an embodiment of the motor assembly of the electric toothbrush of the present utility model;
[0019] Figure 2 Is Figure 1 Partial exploded structural diagram of the motor assembly of the electric toothbrush in;
[0020] Figure 3 Is Figure 2 Another exploded structural diagram of the motor assembly in;
[0021] Figure 4 Is Figure 3 Schematic structural diagram of the motor assembly from another angle in;
[0022] Figure 5 Is the top view of an embodiment of the motor assembly of the electric toothbrush of the present utility model;
[0023] Figure 6 Is Figure 5 Cross-sectional view along line VI-VI in;
[0024] Figure 7 Is Figure 5 Cross-sectional view along line VII-VII in;
[0025] Figure 8 Is the cross-sectional view of another embodiment of the motor assembly of the electric toothbrush of the present utility model;
[0026] Figure 9 Is the exploded structural diagram of the motor body, end plate, and buffer sleeve of the present utility model;
[0027] Figure 10 Is the schematic structural diagram of an embodiment of the first half shell of the present utility model;
[0028] Figure 11 Is the schematic structural diagram of an embodiment of the electric toothbrush of the present utility model.
[0029] Explanation of the reference numerals in the attached drawings:
[0030]
[0031] The realization of the object, functional features, and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions conflicts or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.
[0034] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B simultaneously.
[0035] The present utility model provides a motor assembly for an electric toothbrush.
[0036] In the embodiments of the present utility model, please refer to Figures 1 to 4 , the motor assembly 10 of the electric toothbrush includes a motor bracket 100 and a motor body 200; the motor bracket 100 encloses to form a motor installation cavity 110; the motor body 200 is accommodated in the motor installation cavity 110; an end plate 300 is fixedly connected to the upper end surface of the motor body 200, and an anti-rotation portion 231 is provided on the lower peripheral side wall of the motor body 200, and a mating portion 111 corresponding to the anti-rotation portion 231 is provided in the motor installation cavity 110; the end plate 300 and the motor bracket 100 are fixed by a connecting member 400, and the anti-rotation portion 231 and the mating portion 111 are in circumferential limit fit around the motor body 200.
[0037] In this embodiment, the motor bracket 100 is used to provide installation, support, and protection for the motor body 200. There can be many structures and forms of the motor bracket 100. For example, the motor bracket 100 can be a whole-shell structure or a structure spliced by two half-shells, as long as a motor installation cavity 110 is enclosed. The structure of the motor bracket 100 is not specifically limited here. The end plate 300 can specifically be made of metal materials such as steel plates and iron plates, or can also be made of non-metal materials such as carbon fiber and plastics. Then, the end plate 300 and the motor body 200 can be fixedly connected by means such as welding and screws. The end plate 300 is fixedly connected to the upper end face of the motor body 200, so the end plate 300 and the motor body 200 are connected as a whole. The connecting member 400 can specifically be screws, rivets, etc. Optionally, for the convenience of disassembly, repair, and inspection, the connecting member 400 is a screw. By fixing the end plate 300 and the motor bracket 100 through the connecting member 400, the connection stability and reliability of the two can be ensured. And by fixedly connecting the upper end of the motor body 200 to the motor bracket 100 through the end plate 300, compared with directly fixedly connecting the motor housing 220 bracket to the motor bracket 100, the end plate 300 can increase the connection thickness, thereby increasing the connection area and connection strength between the motor and the motor bracket 100, effectively avoiding the connection deformation of the motor housing 220, and further improving the installation accuracy and strength of the motor and the motor bracket 100.
[0038] The anti-rotation part 231 can specifically be a rib, a protrusion, a groove, etc. provided on the circumferential side wall of the lower end of the motor body 200. By making the anti-rotation part 231 and the mating part 111 be in circumferential limiting cooperation around the circumference of the motor body 200, the lower end of the motor body 200 can achieve circumferential limiting relative to the motor bracket 100 through the anti-rotation part 231 and the mating part 111, effectively avoiding the circumferential rotation and displacement of the lower end of the motor body 200. In this way, both the upper end and the lower end of the motor body 200 are provided with limiting connection structures to cooperate with the motor bracket 100 to achieve double-limiting rotation, effectively avoiding the loosening of the motor body 200 relative to the motor bracket 100, thereby avoiding excessive vibration amplitude and reduced motion accuracy caused by the loosening of the motor body 200.
[0039] For the motor assembly 10 of the electric toothbrush of the present utility model, the upper end face of the motor body 200 is fixedly connected to the end plate 300, and the end plate 300 and the motor bracket 100 are fixed by the connecting member 400; in this way, the connection area and connection strength between the motor and the motor bracket 100 can be increased, the connection deformation of the motor housing 220 can be effectively avoided, and the installation accuracy and strength of the motor and the motor bracket 100 can be further improved. At the same time, the outer peripheral wall of the lower end of the motor body 200 is in circumferential limiting cooperation with the mating portion 111 of the motor bracket 100 through the anti-rotation portion 231, effectively preventing the lower end of the motor body 200 from rotating relative to the motor bracket 100. Therefore, limiting connection structures are provided at both the upper end and the lower end of the motor body 200 to cooperate with the motor bracket 100, realizing double-limiting rotation, effectively avoiding the loosening of the motor body 200 relative to the motor bracket 100, and ensuring the structural stability of the overall electric toothbrush.
[0040] In one embodiment, as Figures 2 to 6 shown, the end plate 300 is welded to the upper end face of the motor body 200, and a positioning convex column 310 is integrally formed on the upper surface of the end plate 300, and the motor bracket 100 is provided with a positioning groove 140 that cooperates with the positioning convex column 310.
[0041] In this embodiment, it can be understood that the motor body 200 has an output shaft 210 connected to the toothbrush head. The motor housing 220 of the motor body 200 usually adopts metal parts such as sheet metal parts. Then the end plate 300 is specifically made of metal materials such as steel and iron. By welding the end plate 300 to the upper end face of the motor body 200, there is no need to additionally provide a connection structure to connect the end plate 300 and the motor body 200, and the punching deformation of the motor housing 220 can be effectively avoided. The number of the positioning convex columns 310 can be set to one, or can be set to two or more. Optionally, in order to improve the positioning accuracy, two positioning convex columns 310 are provided, and the two positioning protrusions are symmetrically arranged relative to the output shaft 210 of the motor body 200. The integral formation of the positioning convex column 310 and the end plate 300 can ensure the structural strength. By making the end plate 300 cooperate with the positioning groove 140 on the motor bracket 100 through the positioning convex column 310, the pre-positioning assembly of the end plate 300 and the motor bracket 100 can be realized, thereby improving the alignment accuracy of the motor body 200, the end plate 300 and the motor bracket 100, making it more convenient for the connecting member 400 to be aligned and installed with the end plate 300 and the motor bracket 100, and further reducing the assembly difficulty of the motor body 200 and the motor bracket 100 and improving the assembly efficiency.
[0042] Furthermore, please refer to Figures 2 to 6 、 Figure 10The motor bracket 100 includes a first half shell 120 and a second half shell 130 which are spliced with each other in the thickness direction thereof. The first half shell 120 and the second half shell 130 enclose a motor installation cavity 110 , and a positioning groove 140 is provided at the splicing position of the first half shell 120 and the second half shell 130 .
[0043] In this embodiment, the motor body 200 has an output shaft 210 connected to the brush head. The motor bracket 100 includes a first half shell 120 and a second half shell 130 spliced to each other in the thickness direction thereof, that is, the splicing surface of the first half shell 120 and the second half shell 130 extends along the axial direction of the output shaft 210, and the first half shell 120 and the second half shell 130 are spliced in the radial direction of the output shaft 210. The first half shell 120 and the second half shell 130 can be fixedly connected by screws, buckles, etc.
[0044] By providing the positioning groove 140 at the joint of the first half shell 120 and the second half shell 130, that is, a part of the positioning groove 140 is located at the first half shell 120, and the other part is located at the second half shell 130, a complete positioning groove 140 is formed after the first half shell 120 and the second half shell 130 are joined. In this way, during assembly, the motor body 200 can be first installed to the first half shell 120 or the second half shell 130 along the radial direction of the output shaft 210, so that the positioning boss 310 on the end plate 300 is embedded in the positioning groove 140 on the first half shell 120 or the second half shell 130, and then the first half shell 120 and the second half shell 130 are assembled to achieve the positioning boss 310 on the end plate 300 and the first half shell 120 and the second half shell 130 are aligned and matched at the same time. In this way, the position of the positioning groove 140 can be directly observed during assembly, which reduces the difficulty of positioning, makes the positioning and assembly of the motor body 200 and the motor bracket 100 more convenient and quick, and effectively improves the assembly efficiency.
[0045] In one embodiment, if Figures 2 to 5 , Figure 7 and Figure 9 As shown, at least one mounting hole 121 is respectively provided on the upper surface of the first half shell 120 and the second half shell 130 corresponding to the end plate 300 , and a threaded hole 320 is provided on the end plate 300 corresponding to the mounting hole 121 , and the connecting member 400 passes through the mounting hole 121 and is threadedly connected to the threaded hole 320 .
[0046] In this embodiment, the connecting member 400 is specifically a screw. The screw passes through the mounting hole 121 of the first half shell 120 or the second half shell 130 and is threadedly connected to the threaded hole 320 on the end plate 300. It should be noted that the thickness of the end plate 300 is greater than the thickness of the motor housing 220 of the motor body 200. Then, threaded holes 320 are provided on the end plate 300, and the end plate 300 is threadedly connected through the connecting member 400 to fix the end plate 300 and the motor bracket 100, which can ensure the connection stability and reliability between the motor body 200 and the motor bracket 100. At least one mounting hole 121 is provided on both the first half shell 120 and the second half shell 130, that is, the end plate 300 is fixedly connected to both the first half shell 120 and the second half shell 130 through the connecting member 400. On the one hand, the connection reliability between the end plate 300 and the entire motor bracket 100 is improved, and on the other hand, the first half shell 120 and the second half shell 130 can be connected through the end plate 300, thereby improving the connection reliability between the first half shell 120 and the second half shell 130.
[0047] In one embodiment, please refer to Figures 2 to 4 , Figures 8 to 10 , the mating portion 111 is a mating groove formed at the joint of the first half shell 120 and the second half shell 130, and the anti-rotation portion 231 is a rib provided on the motor body 200 and extending in the up and down direction.
[0048] In this embodiment, by making the mating groove be located at the joint of the first half shell 120 and the second half shell 130, that is, a part of the mating groove is located at the first half shell 120 and the other part is located at the second half shell 130, a complete mating groove is formed after the first half shell 120 and the second half shell 130 are joined. In this way, during assembly, the motor body 200 can be first installed radially along the output shaft 210 to the first half shell 120 or the second half shell 130, so that the rib on the motor body 200 is embedded in the mating groove on the first half shell 120 or the second half shell 130, and then the first half shell 120 and the second half shell 130 are assembled to achieve the alignment and cooperation of the rib on the motor body 200 with both the first half shell 120 and the second half shell 130 at the same time. In this way, the position of the mating groove can be directly observed during assembly, reducing the positioning difficulty between the anti-rotation portion 231 and the mating portion 111, making the positioning and assembly of the motor body 200 and the motor bracket 100 more convenient and fast, and effectively improving the assembly efficiency.
[0049] In one embodiment, as Figures 2 to 4As shown, on the splicing surface of the first half shell 120, there is a positioning rib 122 extending in the up and down direction, and on the splicing surface of the second half shell 130, there is a groove 131 adapted to be engaged with the positioning rib 122. That is, the splicing surfaces of the first half shell 120 and the second half shell 130 are mutually engaged through the positioning rib 122 and the groove 131. That is, the first half shell 120 and the second half shell 130 can be pre-positioned and assembled through the positioning rib 122 and the groove 131, which can ensure the splicing accuracy of the first half shell 120 and the second half shell 130 and improve the assembly efficiency of the first half shell 120 and the second half shell 130.
[0050] Furthermore, please refer to Figures 1 to 6 , on the outer peripheral wall of the first half shell 120, there is an engaging rib 123 corresponding to the positioning rib 122. The engaging rib 123 is used to be embedded in the inner wall of the brush handle housing 20 and is integrally formed with the positioning rib 122. By providing the engaging rib 123 on the outer peripheral wall of the first half shell 120, when the motor bracket 100 is assembled into the brush handle housing 20, the engaging rib 123 of the first half shell 120 can be embedded in the inner wall of the brush handle housing 20, which can further ensure the assembly accuracy of the motor bracket 100 and the brush handle housing 20 and improve the overall assembly efficiency. Making the engaging rib 123 and the positioning rib 122 integrally formed can simplify the structure of the first half shell 120, make the structure of the entire motor bracket 100 simpler and more beautiful, and be more convenient for molding and manufacturing.
[0051] In an embodiment, as Figure 4 , Figure 10 shown, on the inner wall surface of the motor bracket 100, there are a plurality of limiting grooves 150; a buffer sleeve 500 is sleeved on the outer periphery of the motor body 200. A plurality of hollow holes 510 are provided on the buffer sleeve 500. The buffer sleeve 500 is clamped between the motor body 200 and the cavity wall of the motor installation cavity 110, so that a part of the buffer sleeve 500 is received in the limiting grooves 150.
[0052] In this embodiment, the buffer sleeve 500 can be made of buffer materials such as foam, sponge, rubber, etc. By sleeving the buffer sleeve 500 on the outer periphery of the motor body 200, the vibration of the motor body 200 can be buffered and absorbed. A plurality of hollow holes 510 are provided on the buffer sleeve 500, which is beneficial to the heat dissipation of the motor body 200 while ensuring the buffer and shock absorption effect. A plurality of limiting grooves 150 are provided on the inner wall surface of the motor bracket 100, so that the buffer sleeve 500 is clamped between the motor body 200 and the cavity wall of the motor installation cavity 110, and then a part of the buffer sleeve 500 is received in the limiting grooves 150 through the extrusion effect. In this way, through the cooperation of the buffer sleeve 500 and the limiting grooves 150, further circumferential and axial limiting of the middle part of the motor body 200 in the up and down directions can be realized, further avoiding the loosening and displacement of the motor body 200 relative to the motor bracket 100, and effectively improving the overall structural stability of the electric toothbrush.
[0053] In one embodiment, please refer to Figures 2 to 7 , Figure 9 , the motor body 200 includes an output shaft 210, a motor housing 220, and an end housing 230; the end housing 230 is fixedly connected to the lower end of the motor housing 220, the upper end of the output shaft 210 extends out of the upper end of the motor housing 220, and the lower end of the output shaft 210 extends into the end housing 230; an anti-rotation portion 231 is provided on the end housing 230, and the end plate 300 is fixedly connected to the upper end surface of the motor housing 220. The end housing 230 can be fixedly connected to the motor housing 220 by means of screws, plugging, etc. This end housing 230 is usually used to install the Hall sensor circuit board. The end housing 230 is usually made of plastic, while the motor housing 220 is made of metal. By providing the anti-rotation portion 231 on the end housing 230, compared with providing the anti-rotation portion 231 on the motor housing 220, the processing cost is low.
[0054] The present utility model also proposes an electric toothbrush, as Figure 11 shown, this electric toothbrush includes a toothbrush head, a brush handle housing 20, and a motor assembly 10 of the electric toothbrush. The motor assembly 10 of the electric toothbrush is installed in the brush handle housing 20, and the output shaft 210 of the motor body 200 of the motor assembly 10 extends out of the brush handle housing 20 and is connected to the toothbrush head. The specific structure of the motor assembly 10 of this electric toothbrush refers to the above-mentioned embodiment. Since this electric toothbrush adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one. The structures of the toothbrush head and the brush handle housing 20 can be many, and the connection structure between the motor assembly 10 of the electric toothbrush and the brush handle housing 20 can also be many types. For details, reference can be made to the existing designs and will not be elaborated here.
[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A motor assembly for an electric toothbrush, characterized in that: include: A motor bracket encloses and forms a motor installation cavity; The motor body is accommodated in the motor mounting cavity; the upper end surface of the motor body is fixedly connected with an end plate, the lower end peripheral side wall of the motor body is provided with an anti-rotation portion, and the motor mounting cavity is provided with a matching portion corresponding to the anti-rotation portion; the end plate and the motor bracket are fixed by a connecting piece, and the anti-rotation portion and the matching portion are matched in the circumferential upper limit position around the motor body.
2. The motor assembly of the electric toothbrush according to claim 1, characterized in that: The end plate is welded to the upper end surface of the motor body, a positioning boss is integrally formed on the upper surface of the end plate, and the motor bracket is provided with a positioning groove matched with the positioning boss.
3. The motor assembly of the electric toothbrush according to claim 2, characterized in that: The motor bracket includes a first half shell and a second half shell which are spliced to each other in the thickness direction thereof, the first half shell and the second half shell enclose the motor installation cavity, and the positioning groove is arranged at the splicing position of the first half shell and the second half shell.
4. The motor assembly of the electric toothbrush according to claim 3, characterized in that: The first half shell and the second half shell are each provided with at least one mounting hole on the upper surface corresponding to the end plate, the end plate is provided with a threaded hole corresponding to the mounting hole, and the connecting member passes through the mounting hole and is threadedly connected with the threaded hole.
5. The motor assembly of the electric toothbrush according to claim 3 or 4, characterized in that: The matching portion is a matching groove provided at the joint of the first half shell and the second half shell, and the anti-rotation portion is a convex rib provided on the motor body and extending in the up-down direction.
6. The motor assembly of the electric toothbrush according to claim 3, characterized in that: A positioning convex strip extending in the up-down direction is provided on the splicing surface of the first half shell, and an embedding groove adapted to be embedded with the positioning convex strip is provided on the splicing surface of the second half shell.
7. The motor assembly of the electric toothbrush according to claim 6, characterized in that: An outer peripheral wall of the first half shell is provided with an embedding convex strip corresponding to the positioning convex strip. The embedding convex strip is used to be embedded in the inner wall of the brush handle shell and is integrally formed with the positioning convex strip.
8. The motor assembly of an electric toothbrush according to any one of claims 1 to 4, characterized in that: The inner wall surface of the motor bracket is provided with a plurality of limiting grooves; the outer periphery of the motor body is provided with a buffer sleeve, the buffer sleeve is provided with a plurality of hollow holes, and the buffer sleeve is clamped between the motor body and the cavity wall of the motor mounting cavity so that the buffer sleeve is partially accommodated in the limiting groove.
9. The motor assembly of an electric toothbrush according to claim 1, characterized in that: The motor body includes an output shaft, a motor housing and an end housing; the end housing is fixedly connected to the lower end of the motor housing, the upper end of the output shaft extends out of the upper end of the motor housing, and the lower end of the output shaft extends into the end housing; the anti-rotation portion is provided on the end housing, and the end plate is fixedly connected to the upper end surface of the motor housing.
10. An electric toothbrush, characterized in that: The invention comprises a brush head, a brush handle shell and a motor assembly of an electric toothbrush as claimed in any one of claims 1 to 9, wherein the motor assembly of the electric toothbrush is installed in the brush handle shell, and the output shaft of the motor body of the motor assembly extends out of the brush handle shell and is connected to the brush head.