CN220629010U

CN220629010U - Motor support assembly and electric toothbrush

Info

Publication number: CN220629010U
Application number: CN202322309509.1U
Authority: CN
Inventors: 叶洪新; 王子胜; 肖美亮
Original assignee: Shenzhen Shuye Innovation Technology Co ltd
Current assignee: Shenzhen Shuye Innovation Technology Co ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-03-19
Anticipated expiration: 2033-08-25

Abstract

The application discloses motor support subassembly and electric toothbrush, wherein, motor support subassembly includes: the motor housing is a sheet metal part; the motor support is arranged outside the motor shell and is provided with a fixing hole; and the adapter is arranged between the motor shell and the motor support, the adapter is in surface contact with the motor shell and is fixedly bonded, the adapter is provided with a screw hole, the screw hole corresponds to the fixing hole and is used for a screw to penetrate so as to lock the adapter and the motor support, and the thickness of the adapter is larger than that of the motor shell. By the arrangement, the installation accuracy of the motor can be improved.

Description

Motor support assembly and electric toothbrush

Technical Field

The application relates to the technical field of fixed structures of motors, in particular to a motor bracket assembly and an electric toothbrush.

Background

In general, the motor needs to be fixed to other structures by the motor bracket, however, since the housing of the motor is thin, not only deformation is easy to occur, but also the contact area with other structures in the thickness direction is small, so that the motor housing is deformed and displaced by force due to insufficient strength and too small fixing area when being fixed with the motor bracket, thereby affecting the mounting accuracy of the motor. In the related art development, therefore, it is a difficult problem how to accurately fix the motor at a low cost.

Disclosure of Invention

The main objective of this application is to propose a motor support subassembly and electric toothbrush, aims at solving the technical problem that traditional motor installation accuracy is low.

To achieve the above object, a motor bracket assembly according to the present application includes:

the motor housing is a sheet metal part;

the motor support is arranged outside the motor shell and is provided with a fixing hole; the method comprises the steps of,

the adapter is arranged between the motor shell and the motor support, the adapter is in surface contact with the motor shell and is fixedly bonded, the adapter is provided with a screw hole, the screw hole corresponds to the fixing hole and is used for a screw to penetrate through so as to lock the adapter and the motor support, and the thickness of the adapter is larger than that of the motor shell.

Optionally, the motor housing is cylindrical and has a first end surface intersecting with the axis of the motor housing, the first end surface is provided with a relief hole, and the axis of the relief hole coincides with the axis of the motor housing; the adapter is arranged on the first end face, and the adapter is arranged around the axis of the motor shell.

Optionally, the first end face is provided with a positioning flange, the positioning flange surrounds the hole edge of the yielding hole, and the adapter is sleeved on the outer side of the positioning flange.

Optionally, the outer surface of the motor shell is provided with a positioning protrusion, the adapter is provided with a positioning hole, the axis of the positioning hole is staggered with the axis of the motor shell, and the positioning protrusion and the positioning hole are in plug-in fit positioning.

Optionally, the motor support includes the cover and establishes the first sleeve outside the motor casing, first telescopic one end is open the other end and has the end cover, the end cover is provided with the fixed orifices.

Optionally, the motor housing is further provided with an avoidance hole, and the avoidance hole is arranged corresponding to the screw hole so that the screw can be inserted into the avoidance hole.

Optionally, the adaptor is a steel plate.

Optionally, a damping structure is further arranged between the motor housing and the motor bracket, and the motor housing and the motor bracket are respectively abutted to the damping structure.

Optionally, the motor shell, the damping structure and the motor bracket are respectively sleeve-shaped and sequentially sleeved with the motor shell, the damping structure and the motor bracket; and/or the number of the groups of groups,

the side of the damping structure facing the motor support is arranged in a concave-convex mode.

The embodiment of the application also provides an electric toothbrush, which comprises:

a housing, the housing forming an interior cavity;

the motor support assembly is arranged in the inner cavity, the motor support is fixed relative to the shell, and the motor shell is provided with an installation cavity;

a stator disposed in the mounting cavity; the method comprises the steps of,

and the rotor is arranged in the mounting cavity.

This application technical scheme is through increasing the adaptor, and this adaptor is fixed to motor casing, sets up the screw simultaneously on the adaptor, and consequently the motor support is fixed with motor casing through the screw on the adaptor, and the screw is shifted to the adaptor to the fastening force of screw pore wall, so motor casing can not take place bending deformation because of the effect of screw. And, because the thickness of adaptor is great, not only intensity is great be difficult to take place bending deformation and influence positioning accuracy, and the axial size of screw is also great on the adaptor moreover, so the cooperation area of screw and screw is big, and both can close-fit, avoids appearing the pine phenomenon. In conclusion, the arrangement of the adapter can ensure the installation accuracy of the motor, and the motor can be accurately fixed with low cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of an electric toothbrush in an embodiment of the present application;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is an assembled schematic view of the motor bracket assembly of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the motor bracket assembly of FIG. 3;

FIG. 5 is an enlarged schematic view at B in FIG. 4;

FIG. 6 is an exploded view of the motor bracket assembly of FIG. 5;

FIG. 7 is a schematic cross-sectional view of a motor bracket assembly according to another embodiment of the present application;

FIG. 8 is a schematic view of the shock absorbing structure of FIG. 7;

fig. 9 is a schematic plan view of the shock absorbing structure of fig. 8.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						100	Motor support assembly	21	Fixing hole	41	Convex part
10	Motor shell	22	First sleeve barrel	42	Groove
						11	Mounting cavity	23	End cap	50	Screw bolt
12	First end surface	24	Second sleeve barrel	61	Electric brush head
						13	Yielding hole	25	Anti-rotation protrusion	62	Handle
14	Positioning protrusion	26	Recessed region	70	Motor shaft
						15	Positioning flange	30	Adapter piece	80	Outer casing
16	Third sleeve barrel	31	Screw hole	81	Inner cavity
						17	Fixing ring	32	Positioning hole	91	Stator
18	Avoidance hole	40	Shock-absorbing structure	92	Rotor
						20	Motor support

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that, in the description of the present application, if the terms "first," "second," and the like are used merely for convenience in describing different components or names, they should not be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme where a and B meet at the same time.

Referring to fig. 1 to 6 in combination, an embodiment of the present application provides a motor support assembly 100, where the motor support assembly 100 includes: the motor comprises a motor shell 10, a motor bracket 20 and an adapter 30, wherein the motor shell 10 is a sheet metal part, the motor bracket 20 is arranged outside the motor shell 10, and the motor bracket 20 is provided with a fixing hole 21; the adaptor 30 is arranged between the motor housing 10 and the motor bracket 20, the adaptor 30 is fixedly adhered to the motor housing 10, the adaptor 30 is provided with a screw hole 31, the screw hole 31 corresponds to the fixing hole 21 and is used for the screw 50 to penetrate through to fix the adaptor 30 and the motor bracket 20, and the thickness of the adaptor 30 is larger than that of the motor housing 10.

When the screw hole 31 is directly formed in the motor housing 10 and the motor bracket 20 is fixed to the position corresponding to the screw hole 31 by using the screw 50, since the motor housing 10 is made of a sheet metal part, the thickness of the sheet metal part is generally thinner, and when the screw 50 is matched with the screw hole 31, the screw hole 31 is easily deformed by twisting the motor housing 10 around the screw hole 31, so that the position of the screw hole 31 relative to the motor bracket 20 is deviated. Moreover, the axial dimension of the screw hole 31 is small, the matching area of the screw 50 and the screw hole 31 is too small, and the screw 50 and the screw hole 31 are easy to loose. Thus, the motor housing 10 is easily released from the motor bracket 20, and the mounting accuracy of the motor housing 10 on the motor bracket 20 is lowered, so that both the stator 91 and the rotor 92 in the motor housing 10 deviate from the preset orientation, and thus the electric brush head 61 connected to the rotor 92 also rotates or swings from the preset axis.

In the embodiment of the application, the adaptor 30 is added to be adhesively fixed to the motor housing 10, and the screw hole 31 is arranged on the adaptor 30, so that the motor bracket 20 is fixed with the motor housing 10 through the screw hole 31 on the adaptor 30, and the fastening force of the screw 50 to the wall of the screw hole 31 is transferred to the adaptor 30, so that the motor housing 10 cannot be bent and deformed due to the action of the screw 50. In addition, because the thickness of the adaptor 30 is larger, not only the intensity is larger, but also the bending deformation is not easy to occur to influence the positioning precision, and the axial dimension of the screw hole 31 on the adaptor 30 is also larger, so that the matching area of the screw 50 and the screw hole 31 is large, the screw 50 and the screw hole 31 can be tightly matched, and the loosening phenomenon is avoided. In combination, the arrangement of the adapter 30 can ensure the installation accuracy of the motor, and the motor can be accurately fixed with lower cost.

Further, since the motor housing 10 is formed by using a sheet metal part, the forming process of the sheet metal part is usually stamping and stretching, and thus the motor housing 10 is formed by integrally stamping and/or stretching the sheet metal part, the process of integrally stamping and/or stretching cannot form a protrusion having a height large enough to be suitable for forming the screw hole 31. Therefore, in the embodiment of the application, the arrangement of the screw hole 31 can be realized by adding the adaptor 30, so that the problems that the motor housing 10 is insufficient in strength due to the thinner thickness and the screw hole 31 with larger depth cannot be arranged are solved.

In addition, the motor housing 10 adopts the sheet metal component, and the intensity of sheet metal component is bigger relative to the plastic part, and the sheet metal component has better protective effect to inside stator 91 and rotor 92, can also play electromagnetic shield effect simultaneously, reduces external electromagnetism to inside stator 91 and rotor 92's influence.

In the present embodiment, the thickness of the motor housing 10 refers to the wall thickness, i.e., the thickness between the inner and outer surfaces of the motor housing 10. The thickness direction of the adapter 30 is parallel to the axial direction of the screw hole 31. The motor housing 10 is formed with a mounting cavity 11 for mounting the stator 91 and the rotor 92 of the motor, and thus the motor housing 10 refers to a protective case of the motor for protecting and accommodating the stator 91 and the rotor 92 of the motor.

The fixing hole 21 on the motor bracket 20 can be a screw hole 31 or a smooth through hole, and the screw head of the screw 50 is limited on the side of the motor bracket 20 away from the motor housing 10.

Optionally, the adaptor 30 is in surface contact with the motor housing 10, so that the adaptor and the motor housing have a larger contact area, and when bonding, the bonding is relatively firm.

Referring to fig. 5 and 6 in combination, further, the motor housing 10 is further provided with a avoiding hole 18, the avoiding hole 18 is disposed corresponding to the screw hole 31, and the screw 50 can be inserted into the avoiding hole 18, so that the screw 50 can be completely inserted into the screw hole 31 and is in threaded fit with the whole hole wall of the screw hole 31, and stable fit is achieved by fully utilizing the thickness of the adaptor 30. The arrangement of the avoidance hole 18 corresponding to the screw hole 31 means that the orthographic projection of the avoidance hole 18 on the screw hole 31 is at least partially overlapped with the screw hole 31, and optionally, the axis of the avoidance hole 18 is overlapped with the axis of the screw hole 31. In some embodiments, the relief hole 18 has a larger bore diameter than the screw hole 31 to facilitate insertion of the screw 50 into the relief hole 18.

In some embodiments, the motor housing 10 is cylindrical and has a first end surface 12, the first end surface 12 intersects with the axis P of the motor housing 10, the first end surface 12 is provided with a relief hole 13, the relief hole 13 is communicated with the mounting cavity 11, the axis of the relief hole 13 coincides with the axis P of the motor housing 10, and the relief hole 13 is used for the power supply shaft 70 to pass through; the adapter 30 is disposed at the first end face 12 and around the relief hole 13. In this way, the motor bracket 20 fixes one end of the motor housing 10, and the fixed position is located at the position where the motor shaft 70 passes out, so that the motor bracket 20 positions the motor housing 10 at the position where the motor shaft 70 passes out, and improves the position accuracy when the motor shaft 70 passes out of the motor housing 10, thereby ensuring that the motor shaft 70 can more accurately be in butt joint with the electric brush head 61 when passing out of the motor housing 10, and driving the electric brush head 61 to rotate or swing along the preset axis.

Alternatively, the first end surface 12 is perpendicular to the axis P of the motor housing 10, and of course, the first end surface 12 may be disposed at an angle smaller than 90 ° to the axis P of the motor housing 10.

The axis P of the motor housing 10 refers to the center line of its cylindrical structure, and the axis P of the motor housing 10 generally coincides with the axis of the motor shaft 70, so the axis P of the motor housing 10 also refers to the axis of the motor shaft 70.

In the above description, the rotor 92 is fixed to the motor shaft 70, and when the coil of the stator 91 is energized, a driving magnetic field can be generated, and the driving magnetic field can drive the rotor 92 to rotate, so as to drive the motor shaft 70 connected thereto to rotate or swing.

Further, the first end face 12 is provided with a positioning flange 15, the positioning flange 15 surrounds the hole edge of the yielding hole 13, and the adaptor 30 is sleeved outside the positioning flange 15. The positioning flange 15 not only can provide positioning assistance for the installation of the adapter 30, but also can enhance the strength of the hole edge of the yielding hole 13 of the motor housing 10, and prevent the insufficient strength of the first end face 12 caused by the provision of the yielding hole 13. Alternatively, the adapter 30 is a tight fit with the locating flange 15, so the locating flange 15 can limit the movement of the adapter 30. The tight fit herein refers to an interference fit or a transition fit. The positioning flange 15 is formed by integrally bending the hole edge of the relief hole 13.

In some embodiments, the adapter 30 is in an annular plate-like structure. Of course, the adapter 30 may have a circular plate shape, a square plate shape, a cylindrical shape, or the like.

Referring to fig. 6 and 7 in combination, further, the outer surface of the motor housing 10 is provided with a positioning protrusion 14, the adaptor 30 is provided with a positioning hole 32, the axis of the positioning hole 32 is staggered from the axis P of the motor housing 10, and the positioning protrusion 14 is inserted into the positioning hole 32. Since the axis of the positioning hole 32 is offset from the axis P of the motor housing 10, when the adapter 30 is mounted to the motor housing 10, the positioning protrusion 14 can position the adapter 30 in the circumferential direction of the motor housing 10, restricting the rotation of the adapter 30 about the motor shaft 70 relative to the motor housing 10, so that the screw hole 31 on the adapter 30 can be held at a predetermined position in the circumferential direction of the motor housing 10 relative to the motor housing 10, which corresponds to holding the motor housing 10 at a predetermined position in the circumferential direction relative to the motor housing 20 when the screw 50 is inserted through the fixing hole 21 of the motor housing 20 and the screw hole 31 of the adapter 30.

Alternatively, the adaptor 30 is provided with a plurality of screw holes 31 and a plurality of positioning holes 32, and the plurality of screw holes 31 and the plurality of positioning holes 32 are spaced apart in the circumferential direction of the adaptor 30. Specifically, the adaptor 30 may be provided with two screw holes 31 and two positioning holes 32, and the screw holes 31 and the positioning holes 32 are alternately arranged. For example, the line connecting the two screw holes 31 is perpendicular to the line connecting the two positioning holes 32.

Optionally, a locating boss 14 is provided at the first end face 12.

In this embodiment, the motor housing 10 may be sleeve-shaped, and the motor bracket 20 may also be sleeve-shaped, and cover the outer periphery of the motor housing 10, thereby protecting the motor housing 10. The mode of the inner and outer sleeving is beneficial to positioning and mounting between the motor shell 10 and the motor bracket 20, and meanwhile, the motor shell 10 and the motor bracket 20 are in profiling design and are compact in matching.

The sleeve shape described above includes not only a straight cylindrical shape in which the inner diameter is uniform and the outer diameter is uniform throughout the entire structure, but also a stepped cylindrical shape. When the motor housing 10 includes the first end face 12 and the positioning flange 15, the motor housing 10 has a stepped cylindrical shape.

Specifically, the motor support 20 includes a first sleeve 22, the first sleeve 22 is sleeved on the outer periphery of the motor housing 10, one end of the first sleeve 22 is arranged in an open manner, the other end of the first sleeve 22 is provided with an end cover 23, the end cover 23 is provided with a fixing hole 21, and the end cover 23 is arranged facing the first end face 12.

Further, the motor support 20 may further include a second sleeve 24, where the first sleeve 22 and the second sleeve 24 are coaxially disposed, the end cover 23 is an annular end cover, and the second sleeve 24 is connected to a hole edge of the end cover 23, that is, the first sleeve 22 and the second sleeve 24 are connected to form a stepped sleeve shape. The second sleeve 24 surrounds the outer periphery of the positioning flange 15. The second sleeve 24 increases the strength of the end cover 23, and when the end cover 23 is provided with the fixing hole 21, deformation caused by insufficient strength of the end cover 23 can be avoided.

Further, the outer circumferential surface of the second sleeve 24 is also formed with a recessed area 26, and the recessed area 26 extends to opposite ends of the second sleeve 24 and avoids the fixing hole 21, thereby facilitating insertion of the screw 50 into the fixing hole 21.

In this embodiment, the motor housing 10 includes a third sleeve 16, a fixing ring 17 and a positioning flange 15 sequentially connected in an axial direction, the outer end of the fixing ring 17 is connected to the third sleeve 16, the inner end of the fixing ring 17 is connected to the positioning flange 15, and the outer diameter of the third sleeve 16 is larger than the outer diameter of the positioning flange 15. The securing ring 17 has the first end face 12 described above.

The adapter 30 and the motor housing 10 are of separate structures, which are respectively formed by machining, thus enabling the thickness of the adapter 30 to be set to be greater than the thickness of the motor housing 10. To effect the securement of the adapter 30 to the motor housing 10, in some embodiments, the adapter 30 is bonded or welded to the motor housing 10. By using the glue bonding or welding fixing mode, the large holes on the adapter 30 and the motor shell 10 are not needed, so that the problem of strength reduction of the adapter 30 and the motor shell 10 due to punching can be avoided.

In this embodiment, the adaptor 30 can adopt materials such as steel sheet, iron plate, working of plastics, and optionally, the adaptor 30 sets up to the steel sheet, and the steel sheet is platy basically, and the form is comparatively regular, consequently is favorable to laminating to the surface of motor housing 10 and motor support 20, make full use of the space between motor housing 10 and the motor support 20 for compact structure. Further, the strength of the steel plate is high, and even after the screw holes 31 are formed, the steel plate is not deformed.

When the motor is operated, noise is easy to generate, in order to reduce the noise and transmit the noise to the motor bracket 20 through the motor housing 10, the vibration generated by the housing 80 matched with the motor bracket 20 is avoided, therefore, further, please refer to fig. 7 to 9 in combination, a damping structure 40 is further arranged between the motor housing 10 and the motor bracket 20, the motor housing 10 and the motor bracket 20 are respectively abutted to the damping structure 40, and most of the vibration and noise transmitted from the motor housing 10 can be absorbed and buffered by the damping structure 40, so that the effects of noise reduction and damping are achieved.

The shock absorbing structure 40 has various shapes, such as a cylinder, a plate, a block, a column, etc., and in some embodiments, the motor housing 10, the shock absorbing structure 40, and the motor bracket 20 are respectively sleeve-shaped and sequentially sleeved inside and outside. Therefore, the motor housing 10, the damping structure 40 and the motor bracket 20 can fully utilize the space between the motor housing and the motor bracket to realize the lamination, thereby achieving the purpose of compact structure. Meanwhile, the cylindrical shock absorbing structure 40 has a larger area, and the contact area between the motor housing 10 and the motor bracket 20 is correspondingly larger, so that a better shock absorbing effect can be realized at all positions in the circumferential direction.

In some embodiments, a side of the shock-absorbing structure 40 facing the motor support 20 is provided in a concave-convex shape, so that a plurality of protrusions 41 and a plurality of grooves 42 are formed at a side of the shock-absorbing structure 40 facing the motor support 20, the protrusions 41 are in contact with the motor support 20, and a groove bottom wall of the grooves 42 is spaced apart from the motor support 20, so that the grooves 42 function like shock-absorbing grooves. Specifically, when the shock-absorbing structure 40 is vibrated to press the motor bracket 20, the protrusion 41 is deformed against the motor bracket 20, and the groove 42 provides a space for the deformation of the protrusion 41, so that the protrusion 41 is more easily deformed, thereby achieving effective buffering; meanwhile, the groove 42 may also serve as a sound absorbing cavity to absorb a part of noise.

Taking the shock-absorbing structure 40 as an example of a cylindrical shape, the shock-absorbing structure 40 may be provided as a cylindrical structure with both ends penetrating, and the convex portion 41 and the concave groove 42 extend along the axis of the shock-absorbing structure 40 and extend to both end surfaces of the shock-absorbing structure 40. Of course, in other embodiments, the protrusions 41 and the recesses 42 may be circular or square or have other shapes.

Referring to fig. 1 and 2 in combination, the embodiment of the present application further provides an electric toothbrush, which includes a housing 80, a stator 91, a rotor 92, and a motor support assembly 100, and the specific structure of the motor support assembly 100 is referred to the above embodiments and will not be described herein.

Wherein the housing 80 is formed with an inner cavity 81, the motor bracket assembly 100 is disposed in the inner cavity 81, and the motor bracket 20 is fixed relative to the housing 80. The fixing of the motor support 20 with respect to the housing 80 means that no relative movement occurs between the motor support 20 and the housing 80, and the motor support 20 may be directly fixed to the housing 80, or the motor support 20 may abut against the housing 80. Specifically, in order to reduce transmission of vibration, a buffer is provided between the motor bracket 20 and the housing 80, and the motor bracket 20 and the housing 80 are respectively abutted against the buffer.

Referring to fig. 6 in combination, further, in order to prevent the motor support 20 from rotating relative to the housing 80, an anti-rotation protrusion 25 is provided on an outer circumferential surface of the motor support 20, and an anti-rotation groove 42 (not shown) is correspondingly provided on an inner wall surface of the housing 80, and the anti-rotation protrusion 25 is inserted into the anti-rotation groove 42 to be engaged with the anti-rotation groove 42. Optionally, the anti-rotation protrusion 25 is a convex hull formed outwardly of the peripheral wall of the second sleeve 24.

Referring to fig. 1 again in combination, the electric toothbrush includes a handle 62 and an electric brush head 61, the housing 80 refers to a housing 80 of the handle 62, and the cross section of the housing 80 is generally circular or oval, so that the motor housing 10, the motor support 20 and the shock absorbing structure 40 are all configured as cylindrical structures, and can be better adapted to the housing 80, so that the shape and the inner space of the housing 80 are fully utilized, the structure is more compact, and the outer diameter of the housing 80 is prevented from being too large, thereby facilitating the user to hold the handle 62.

In the above description, the shock absorbing structure 40 and the buffer member may be made of materials having good buffering performance, such as silica gel, rubber, sponge, etc.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor bracket assembly, comprising:

the motor housing is a sheet metal part;

2. The motor bracket assembly of claim 1, wherein the motor housing is cylindrical and has a first end face intersecting an axis of the motor housing, the first end face being provided with a relief hole, the axis of the relief hole coinciding with the axis of the motor housing; the adapter is arranged on the first end face, and the adapter is arranged around the axis of the motor shell.

3. The motor bracket assembly of claim 2, wherein the first end face is provided with a positioning flange, the positioning flange surrounds the hole edge of the yielding hole, and the adapter is sleeved outside the positioning flange.

4. The motor bracket assembly of claim 2, wherein the outer surface of the motor housing is provided with a positioning protrusion, the adapter is provided with a positioning hole, the axis of the positioning hole is staggered from the axis of the motor housing, and the positioning protrusion and the positioning hole are in plug-in fit positioning.

5. The motor bracket assembly of claim 2, wherein the motor bracket comprises a first sleeve sleeved outside the motor housing, one end of the first sleeve is open, the other end of the first sleeve is provided with an end cover, and the end cover is provided with the fixing hole.

6. The motor bracket assembly of any one of claims 1 to 5, wherein the motor housing is further provided with a relief hole provided corresponding to the screw hole such that the screw can be inserted into the relief hole.

7. The motor mount assembly of claim 1, wherein the adapter is a steel plate.

8. A motor bracket assembly according to any one of claims 1 to 5, wherein a shock absorbing structure is further provided between the motor housing and the motor bracket, the motor housing and the motor bracket respectively abutting the shock absorbing structure.

9. The motor bracket assembly of claim 8, wherein the motor housing, the shock absorbing structure and the motor bracket are respectively sleeve-shaped and sequentially sleeved inside and outside; and/or the number of the groups of groups,

10. An electric toothbrush, comprising:

a housing, the housing forming an interior cavity;

a motor bracket assembly as claimed in any one of claims 1 to 9, said motor bracket assembly being disposed within said interior cavity, said motor bracket being fixed relative to said housing, said motor housing defining a mounting cavity;

a stator disposed in the mounting cavity; the method comprises the steps of,

and the rotor is arranged in the mounting cavity.