CN218829561U - Motor and electric toothbrush - Google Patents

Abstract

The application discloses a motor and an electric toothbrush, wherein the motor comprises a shell, an output shaft, a first driving mechanism, a second driving mechanism and a limiting assembly; the first driving mechanism is used for driving the output shaft to reciprocate along the axial direction of the output shaft; the second driving mechanism is used for driving the output shaft to rotate around the axial direction of the output shaft in a reciprocating manner; the limiting assembly comprises a bearing, an elastic piece and an end cover; the bearing is sleeved on the output shaft, the end cover is arranged around the periphery of the bearing and connected with the shell, the elastic part is connected with the outer ring of the bearing and the end cover, the bearing follows the output shaft, and when the bearing reciprocates along the axial direction of the output shaft relative to the end cover, the elastic part generates elastic deformation in the axial direction of the output shaft; when the end cover and the outer ring of the bearing rotate around the axial direction of the output shaft in a reciprocating mode, the elastic piece deforms elastically in the circumferential direction of the output shaft. When the motor is applied to the electric toothbrush, the cleaning effect of teeth can be improved by combining the reciprocating rotation with the linear reciprocating movement.

Description

Motor and electric toothbrush

Technical Field

The application relates to the technical field of oral cleaning equipment, in particular to a motor and an electric toothbrush.

Background

In an electric toothbrush, a brush head is generally connected with an output shaft of a motor, and the brush head is driven by the motor to vibrate, so that a cavity of a user is cleaned,

however, the motor of the related art has a single vibration mode, which results in poor cleaning effect of the electric toothbrush.

SUMMERY OF THE UTILITY MODEL

The application provides a motor and electric toothbrush, can improve the clean effect to the tooth.

In a first aspect, the present application provides a motor comprising: a housing having an accommodating chamber; the output shaft, some of the said output shaft stretches into the said accommodating cavity, another part stretches out of the said accommodating cavity; the first driving mechanism is positioned in the accommodating cavity and is used for driving the output shaft to reciprocate along the axial direction of the output shaft; the second driving mechanism is positioned in the accommodating cavity and is used for driving the output shaft to rotate around the axial direction of the output shaft in a reciprocating manner; the limiting assembly is provided with at least one group and comprises a bearing, an elastic piece and an end cover; the bearing is sleeved on the output shaft, the end cover is arranged around the bearing and connected with the shell, the elastic part is connected with an outer ring of the bearing and the end cover, the bearing follows the output shaft, and when the bearing reciprocates along the axial direction of the output shaft relative to the end cover, the elastic part generates elastic deformation in the axial direction of the output shaft; the inner ring of the bearing follows the output shaft, and when the inner ring of the bearing rotates around the axial direction of the output shaft in a reciprocating mode relative to the end cover and the outer ring of the bearing, the elastic piece generates elastic deformation in the circumferential direction of the output shaft.

In a second aspect, an electric toothbrush includes a handle, a head, and a motor; the shell is arranged in the brush handle, one end of the output shaft is arranged in the brush handle, and the other end of the output shaft penetrates through the brush handle and is positioned outside the brush handle; the brush head and one end of the output shaft, which is positioned outside the brush handle, are detachably connected.

The beneficial effect of this application does: when the motor is applied to the electric toothbrush, the reciprocating rotation and the linear reciprocating movement are combined, so that the tooth stain can be removed more effectively, and the tooth cleaning effect can be improved; in addition, when the output shaft linearly reciprocates along the axial direction of the output shaft, the elastic force of the elastic part provides a radial constraint force for the bearing, and the radial constraint force is provided for the output shaft through the bearing, so that the output shaft can be prevented from being twisted in the process of linearly reciprocating along the axial direction of the output shaft, and the axial line of the output shaft can be prevented from deviating; in addition, when the output shaft rotated around the axial of output shaft, elastic deformation did not take place for the elastic component, can not interfered by the elastic component when the output shaft rotated to make the rotation of output shaft and rectilinear motion coupling comfortable, can prevent that the output shaft from taking place the motion jam.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a motor according to an embodiment of the present application;

FIG. 2 is an enlarged view of the point A in FIG. 1;

FIG. 3 is a schematic structural diagram of an elastic member and an output shaft according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a first driving mechanism according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a mounting bracket according to an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating a first stator assembly from a first perspective in one embodiment of the present disclosure;

FIG. 7 is a schematic diagram illustrating a first stator assembly from a second perspective in an embodiment of the present disclosure;

FIG. 8 is a schematic view of the structure of the magnetic conducting member according to an embodiment of the present application;

FIG. 9 is a schematic view of a motor with a housing removed according to an embodiment of the present disclosure;

FIG. 10 is an exploded view of a second drive mechanism according to an embodiment of the present application;

FIG. 11 is a schematic view of a rotor assembly according to an embodiment of the present application;

FIG. 12 is a schematic view of a second stator assembly according to an embodiment of the present application;

figure 13 is an exploded view of a second stator assembly according to an embodiment of the present application;

FIG. 14 is a schematic structural view of a stator core according to an embodiment of the present application;

FIG. 15 is an exploded view of a second drive mechanism according to yet another embodiment of the present application;

FIG. 16 is a schematic cross-sectional view taken along a radial plane of a motor with a housing removed according to an embodiment of the present application;

fig. 17 is a schematic view of a stator core according to another embodiment of the present application.

Reference numerals:

10. a housing; 11. an accommodating chamber; 20. an output shaft; 21. a cylindrical space; 30. a first drive mechanism; 31. a vibrator assembly; 311. an N-pole magnetic pole; 312. an S pole magnetic pole; 32. a first stator assembly; 33. a mounting frame; 331. an insulating sleeve; 331a, a magnetic action cavity; 331b, a communication opening; 331c, a first limiting member; 332. an insulating spacer; 332a, avoiding grooves; 333. a coil accommodating groove; 334. a magnetic conduction accommodating groove; 34. a first coil winding; 35. a magnetic conductive member; 351. a first limit groove; 352. a second limit groove; 36. a second limiting member; 361. a wire passage; 40. a second drive mechanism; 41. a rotor assembly; 411. a rotor magnet portion; 412. a first magnetic ring; 412a, a mounting groove; 412b, a stopper; 413. a socket body; 414. a permanent magnet; 42. a second stator assembly; 421. a stator core; 421a, stator slots; 421b, stator teeth; 421c, a winding part; 421d, inner tooth portion; 421e, external teeth portion; 421f, a connecting part; 421g, a magnetism gathering part; 422. a second coil winding; 423. a first bracket; 423a and a third limiting groove; 50. a limiting component; 51. a bearing; 511. an outer ring; 512. an inner ring; 52. an elastic member; 521. opening a hole; 53. an end cap; 54. a connecting member; 55. and (7) a gasket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

The application provides a motor and electric toothbrush to solve among the correlation technique vibration mode of motor comparatively single, lead to electric toothbrush's the not good enough problem of clean effect.

In a first aspect, the present application provides a motor, as shown in fig. 1 and 2, including a housing 10, an output shaft 20, a first drive mechanism 30, and a second drive mechanism 40.

The housing 10 has an accommodating cavity 11, the housing 10 is used for protecting components in the accommodating cavity 11, and the overall shape of the housing 10 may be cylindrical; one part of the output shaft 20 extends into the accommodating cavity 11, and the other part of the output shaft extends out of the accommodating cavity 11; the first driving mechanism 30 is located in the accommodating cavity 11 and is used for driving the output shaft 20 to reciprocate along the axial direction of the output shaft 20; the second driving mechanism 40 is located in the accommodating cavity 11 and is used for driving the output shaft 20 to rotate back and forth around the axial direction of the output shaft 20.

It can be understood that, when being applied to electric toothbrush with the motor in, electric toothbrush's brush head is installed in output shaft 20, output shaft 20 can carry out straight reciprocating motion under the drive of first actuating mechanism 30, make the brush head can reciprocate clean tooth in a certain position, in addition, output shaft 20 can also be around axial reciprocating rotation under the drive of second actuating mechanism 40, make brush head can be multi-angle clean tooth, through combining together reciprocating rotation and straight reciprocating motion, it is more effective to get rid of the tooth stain, can improve the clean effect to tooth.

Specifically, the motor further comprises a limiting assembly 50, at least one group of limiting assemblies 50 is arranged, and each limiting assembly 50 comprises a bearing 51, an elastic part 52 and an end cover 53; the bearing 51 is sleeved on the output shaft 20, the end cover 53 surrounds the periphery of the bearing 51 and is connected with the shell 10, the elastic piece 52 is connected with the outer ring 511 and the end cover 53 of the bearing 51, the bearing 51 follows the output shaft 20, and when the bearing reciprocates relative to the end cover 53 along the axial direction of the output shaft 20, the elastic piece 52 generates elastic deformation in the axial direction of the output shaft 20; the inner ring 512 of the bearing 51 follows the output shaft 20, and when the inner ring reciprocates relative to the end cover 53 and the outer ring 511 of the bearing 51 around the axial direction of the output shaft 20, the elastic element 52 is elastically deformed in the circumferential direction of the output shaft 20, it is easy to understand that the reason that the elastic element 52 is elastically deformed in the circumferential direction is that rolling friction exists between the outer ring 511 of the bearing 51 and the inner balls, so that the elastic element 52 may be slightly elastically deformed in the circumferential direction of the output shaft 20, and of course, the elastic element 52 may be deformed due to misalignment between the output shaft 20 and the bearing 51, which is not particularly limited herein.

It should be noted that the rotation and the linear motion of the output shaft 20 can be coupled, and when the output shaft 20 rotates and moves linearly, if the output shaft 20 is misaligned, the axis of the output shaft 20 is deviated, which may cause the rotation and the linear motion of the output shaft 20 to be inconsistent, thereby causing the output shaft 20 to generate a motion jam.

In the embodiment of the present application, when the output shaft 20 performs the linear reciprocating motion along the axial direction of the output shaft 20, the bearing 51 integrally follows the output shaft 20 to perform the linear reciprocating motion synchronously, and the elastic member 52 is elastically deformed, so that the elastic force of the elastic member 52 is utilized to provide the radial constraint force for the bearing 51, and the bearing 51 provides the radial constraint force for the output shaft 20, which can prevent the output shaft 20 from twisting during the linear reciprocating motion along the axial direction of the output shaft 20, thereby preventing the deviation of the axis of the output shaft 20, in addition, when the motor stops the linear motion, the elastic member 52 can also play a role of resetting, and the output shaft 20 can be driven to move to the reset position along the axial direction of the output shaft 20 under the effect of the restoring force of the elastic member 52; in addition, when the output shaft 20 rotates around the axial direction of the output shaft 20, the inner ring 512 of the bearing 51 rotates synchronously with the output shaft 20, at this time, the outer ring 511 of the bearing 51 and the end cover 53 do not rotate relatively, the elastic member 52 does not deform elastically, and the output shaft 20 cannot be interfered by the elastic member 52 when rotating, so that the rotation and linear motion coupling of the output shaft 20 is smooth, and the output shaft 20 can be prevented from moving and being jammed.

With continued reference to fig. 1 and 2, in an embodiment of the present application, in the axial direction of the output shaft 20, the elastic member 52 is spaced from the end cover 53, and the elastic member 52 is spaced from the first driving mechanism 30 and the second driving mechanism 40, and the amplitude of the output shaft 20 is smaller than the spacing between the elastic member 52 and the first driving mechanism 30 at the equilibrium position, and the spacing between the elastic member 52 and the second driving mechanism 40 at the equilibrium position, and the spacing between the elastic member 52 and the end cover 53 at the equilibrium position, so that when the elastic member 52 is elastically deformed due to the movement of the output shaft 20, the elastic member 52 does not contact the end cover 53, the first driving mechanism 30, and the second driving mechanism 40 to cause interference; it should be noted that the equilibrium position of the elastic member 52 refers to a position of the elastic member 52 when the elastic member 52 is not elastically deformed.

In an embodiment of the present application, the elastic member 52 is located in the accommodating cavity 11, and an opening 521 is formed in the elastic member 52 and penetrates through the elastic member 52 in the axial direction of the output shaft 20. It can be understood that the opening 521 can communicate the air outside the casing 10 with the accommodating cavity 11 inside the casing 10, and when the motor is running, the air inside the casing 10 can enter and exit the accommodating cavity 11 through the opening 521, so that more heat can be taken away, and the heat dissipation performance of the motor can be improved.

With continued reference to fig. 1 and fig. 2, in an embodiment of the present application, two sets of limiting assemblies 50 are provided, and two sets of limiting assemblies 50 are respectively provided at two opposite ends of the housing 10, and two elastic members 52 of the two sets of limiting assemblies 50 are symmetrically distributed about a central point of the housing 10. It should be noted that, two sets of limiting assemblies 50 are respectively disposed at two opposite ends of the housing 10, and the two ends of the output shaft 20 can be constrained by the two sets of limiting assemblies 50, so as to further improve the radial constraining force applied to the output shaft 20 during movement, and in addition, the two elastic members 52 are symmetrically distributed about the central point of the housing 10, so that the two ends of the output shaft 20 are stressed more uniformly during movement of the output shaft 20, and the rotation and linear movement coupling of the output shaft 20 is more comfortable. It should be noted that the center point of the casing 10 refers to the geometric center of the casing 10, and taking the whole casing 10 as a cylinder as an example, the midpoint of the connecting line between the centers of the two circular end surfaces of the casing 10 is the center point of the casing 10.

In an embodiment of the present application, the bearing 51 follows the output shaft 20, and the maximum displacement distance from the end cover 53 to the receiving cavity 11 is less than or equal to 1mm, for example, 1mm, 1.3mm, 1.5mm, 1.7mm, 2mm, or 3 mm; the maximum displacement distance of the bearing 51 away from the accommodating cavity 11 relative to the end cover 53 following the output shaft 20 is less than or equal to 1mm, so that the movement amplitude of the output shaft 20 is in a proper range, a large axial movement space for the bearing 51 can be omitted, and the phenomenon that the axis of the output shaft 20 is easily deviated due to the overlarge movement amplitude of the output shaft 20 can be prevented.

With continued reference to fig. 1 and 2, in some embodiments of the present application, the limiting assembly 50 further includes a connecting member 54, the connecting member 54 is located between an inner wall of the end cover 53 and an outer ring 511 of the bearing 51, the outer ring 511 of the bearing 51 is connected to the elastic member 52 through the connecting member 54, and the connecting member 54 can follow the bearing 51 and the output shaft 20 to reciprocate along an axial direction of the output shaft 20 relative to the end cover 53. It is understood that the connecting member 54 may connect the outer race 511 of the bearing 51 with the elastic member 52, so that the elastic member 52 is elastically deformed when the bearing 51 follows the axial movement of the output shaft 20 along the output shaft 20.

Further, the connecting member 54 and the end cover 53 are arranged at a distance in the radial direction of the output shaft 20, and a clearance for allowing the connecting member 54 to swing is provided between the outer side wall of the connecting member 54 and the inner side wall of the end cover 53, so that even if the axis of the output shaft 20 is deviated due to misalignment, misalignment of the center of gravity, or centrifugal motion of the output shaft 20, the clearance can provide a clearance for the connecting member 54 to prevent the connecting member 54 from colliding with the end cover 53 to generate noise.

Further, the spacing between the outer side wall of the connector 54 and the inner side wall of the end cap 53 is greater than 0.1 mm, such as 0.11mm, 0.13mm, 0.15mm, 0.17mm, or 2 mm. It will be appreciated that the deflection of the output shaft 20 is typically less than 0.1 mm and the spacing between the outer side wall of the connector 54 and the inner side wall of the end cap 53 is greater than 0.1 mm so that the clearance gap provides sufficient clearance for the connector 54.

Preferably, the connecting member 54 is a sleeve, the connecting member 54 is sleeved on the bearing 51, the outer ring 511 of the bearing 51 is fixed on the connecting member 54, the elastic member 52 is sleeved on the connecting member 54 and is fixedly connected with the connecting member 54, when the output shaft 20 reciprocates along the axial direction of the output shaft 20, the bearing 51 and the sleeve are driven to move synchronously, the force on the output shaft 20 is transmitted to the elastic member 52 through the bearing 51 and the sleeve, the elastic member 52 elastically deforms along the axial direction of the output shaft 20 and provides a radial constraint force for the sleeve, so as to provide a radial constraint force for the output shaft 20; when the output shaft 20 rotates back and forth around the axial direction of the output shaft 20, the inner ring 512 of the bearing 51 rotates synchronously with the output shaft 20, while the outer ring 511 of the bearing 51 and the sleeve are kept stationary, the elastic member 52 does not deform elastically, and thus the interference of the elastic member 52 on the rotation of the output shaft 20 can be avoided.

Preferably, the limiting assembly 50 may include a plurality of bearings 51, the plurality of bearings 51 are spaced along the axial direction of the output shaft 20, and two adjacent bearings 51 are spaced by a spacer 55, so that the rotation of the output shaft 20 is smoother and more stable. The number of the bearings 51 in the position limiting assembly 50 may be 2, 3 or more, and of course, the number of the bearings 51 in the position limiting assembly 50 may also be 1 according to actual requirements.

In an embodiment of the present application, an end of the output shaft 20 extending out of the accommodating cavity 11 is an output end, the first driving mechanism 30 and the second driving mechanism 40 are arranged along an axial direction of the output shaft 20, and the first driving mechanism 30 is located on a side of the second driving mechanism 40 close to the output end. It can be understood that, generally speaking, the mass of the second driving mechanism 40 is greater than that of the first driving mechanism 30, in the embodiment of the present application, the first driving mechanism 30 for driving the output shaft 20 to move linearly is located on a side close to the output end, and the second driving mechanism 40 for driving the output shaft 20 to rotate is located on a side away from the output end, if the output shaft 20 rotates, the axis of the output shaft 20 deviates (which may be the axis of the output shaft 20 deviates due to the fact that the output shaft 20 is pressed, or the axis of the output shaft 20 deviates due to the fact that the output shaft is not centered during installation), since the mass of the first driving mechanism 30 is smaller, the influence of the first driving mechanism 30 on the centrifugal motion of the output shaft 20 is also smaller, and thus the axis of the output shaft 20 can be prevented from deviating greatly.

As shown in fig. 3, in an embodiment of the present application, the elastic element 52 is an elastic sheet, the elastic element 52 extends spirally around the axial direction of the output shaft 20 to form a spiral structure, so that the arm of force of the elastic element 52 can be extended, and the elastic element 52 has better elasticity under the condition that the elastic element 52 has a certain rigidity, so that the position of the output shaft 20 is more stable, and the axis of the output shaft 20 is not easily deviated when the output shaft 20 moves.

As shown in fig. 4, in some embodiments of the present application, the first driving mechanism 30 includes a vibrator assembly 31, a first stator assembly 32, and a magnetic conducting member 35, the vibrator assembly 31 is sleeved on the output shaft 20 and connected to the output shaft 20, and the vibrator assembly 31 has a plurality of N-pole magnetic poles 311 and S-pole magnetic poles 312 alternately arranged along an axial direction of the output shaft 20; the first stator assembly 32 includes a mounting frame 33 and a plurality of first coil windings 34, the mounting frame 33 is disposed around the circumference of the vibrator assembly 31 and connected to the housing 10, the first coil windings 34 are mounted on the mounting frame 33 and disposed around the circumference of the output shaft 20, and the plurality of first coil windings 34 are arranged at intervals in the axial direction of the output shaft 20.

When the first coil windings 34 are energized, the current flow directions of the currents accessed by the two adjacent first coil windings 34 are opposite to each other, so as to drive the vibrator assembly 31 and the output shaft 20 to reciprocate along the axial direction of the output shaft 20.

It should be noted that, in the present application, the output shaft 20 of the motor can directly make a linear motion, when the motor is used as a driving device to realize that the driven part makes a linear motion, the driven part can be directly connected with the output shaft 20, when the output shaft 20 makes a linear motion, the driven part can be driven to directly make a linear motion, the motor and the driven part do not need to be connected through a transmission mechanism such as a gear assembly, in addition, the magnetic driving force between the first stator assembly 32 and the first stator assembly 32 is used as the thrust of the linear motion of the output shaft 20, the motion conversion is more direct and efficient, thereby the kinetic energy loss can be reduced, the output thrust of the motor can be improved, and the noise generated when the transmission mechanism works can be eliminated.

It should be noted that the magnetic conductive member 35 may be an iron core or other magnetically conductive object, as shown in fig. 4, taking the magnetic pole located at the uppermost side of the vibrator assembly 31 as the N-pole magnetic pole 311 as an example, in fig. 4, "X" represents that the current direction of the first coil winding 34 is perpendicular to the paper surface; "." represents the direction of current flow in the first coil winding 34 out of the plane of the vertical paper; during the upper half of the energization, the direction of the current in the first coil winding 34 is as shown in fig. 4 (commutation in the lower half); the magnetic field direction generated by the first coil winding 34 is determined as the vertical direction according to the right-hand rule, but the magnetic fields generated by two adjacent first coil windings 34 are opposite in direction, the magnetic fields generated by two adjacent first coil windings 34 are mutually squeezed when being conducted in the magnetic conductive member 35, so that the magnetic field direction in the magnetic conductive member 35 is the NS direction in the magnetic conductive member 35 shown in fig. 4, the magnetic conductive member 35 forms a radial salient magnetic pole, and the vibrator assembly 31 receives an upward attractive force under the action of the attractive force of the magnetic conductive member 35, so that the vibrator assembly 31 moves upward. In the next half period of energization, the current in the first coil winding 34 is reversed, the direction of the magnetic field in the magnetic conduction member 35 is also changed, at this time, the vibrator assembly 31 is subjected to downward attraction under the action of the attraction of the magnetic conduction member 35, so that the vibrator assembly 31 moves downward, and then, by changing the direction of the current in the first coil winding 34, the vibrator assembly 31 can be driven to reciprocate along the axial direction of the output shaft 20, so as to drive the output shaft 20 to reciprocate along the axial direction of the output shaft 20.

It should be noted that, under the condition of maintaining the frequency of the reciprocating linear motion of the output shaft 20 unchanged, the current of the first coil winding 34 can be adjusted by adjusting the duty ratio alone, so as to meet the requirement on the output strength of the motor, greatly enhance the adjustment range, and increase the cruising ability of the battery.

In some embodiments of the present application, as shown in fig. 4 and 5, mounting bracket 33 includes an insulating sleeve 331 and an insulating spacer 332; an insulating sleeve 331 disposed around the peripheral side of the vibrator assembly 31 and connected to the case 10, the insulating sleeve 331 having a magnetic action chamber 331a accommodating the vibrator assembly 31; the insulation spacers 332 are disposed around the circumference of the insulation sleeve 331 and connected to the insulation sleeve 331, a plurality of insulation spacers 332 are disposed, the insulation spacers 332 are arranged at intervals along the axial direction of the output shaft 20, and a receiving groove is formed between two adjacent insulation spacers 332.

Of the two adjacent accommodating grooves, one accommodating groove is a coil accommodating groove 333, the other accommodating groove is a magnetic conduction accommodating groove 334, the first coil winding 34 is installed in the coil accommodating groove 333 and corresponds to the coil accommodating groove 333 one by one, and the magnetic conduction members 35 are installed in the magnetic conduction accommodating groove 334 and correspond to the magnetic conduction accommodating groove 334 one by one. The coil accommodating groove 333 and the magnetic conductive accommodating groove 334 can be used to provide an installation position and an accommodating space for the first coil winding 34 and the magnetic conductive member 35, and the insulating spacer 332 and the insulating sleeve 331 can perform an insulating and isolating function to prevent the first coil winding 34 from short circuit caused by circuit damage.

Furthermore, a portion of the insulating sleeve 331 corresponding to the magnetic conduction accommodating groove 334 is provided with a communication opening 331b, and the magnetic conduction accommodating groove 334 is communicated with the magnetic action cavity 331a through the communication opening 331b, so that the magnetic field in the magnetic conduction member 35 can smoothly enter the magnetic action cavity 331a and act on the vibrator assembly 31 to drive the vibrator assembly 31 to move.

As shown in fig. 5 to 8, in an embodiment of the present application, a portion of the insulating sleeve 331 corresponding to the magnetic conductive accommodating slot 334 includes a plurality of first position-limiting members 331c, the plurality of first position-limiting members 331c are arranged around the circumference of the vibrator assembly 31 at intervals, and a communication opening 331b is formed between two adjacent first position-limiting members 331 c; the inner side surface of the magnetic conducting member 35 is provided with a first limiting groove 351, and the first limiting member 331c is inserted into the first limiting groove 351. The first position-limiting member 331c is engaged with the first position-limiting groove 351 to limit the position of the magnetic conducting member 35, thereby preventing the magnetic conducting member 35 from rotating.

In some embodiments of the present disclosure, a second limiting groove 352 is further disposed on an outer side surface of the magnetic conductive member 35, a second limiting member 36 connected to the insulating spacer 332 is disposed in the magnetic conductive accommodating groove 334, and the second limiting member 36 is inserted into the second limiting groove 352. The second limiting member 36 is engaged with the second limiting groove 352 to limit the position of the magnetic conducting member 35, so as to prevent the magnetic conducting member 35 from rotating, and the first limiting member 331c and the second limiting member 36 limit the position of the magnetic conducting member 35, so as to prevent the magnetic conducting member 35 from falling out of the magnetic conducting accommodating groove 334.

Furthermore, a wire passage 361 is arranged on the second limiting member 36, an electrical connection wire penetrates through the wire passage 361, and two adjacent first coil windings 34 are connected in series through the electrical connection wire. It should be noted that the electrical connection line can pass through the wire passage 361 reserved on the second limiting member 36 to realize the mutual series connection of the first coil winding 34, and in addition, the wire passage 361 can accommodate the electrical connection line and limit the electrical connection line, so as to avoid the line winding caused by the excessively messy line arrangement in the accommodating cavity.

Furthermore, the insulating separator 332 is provided with a avoiding groove 332a communicated with the wire passing channel 361, and the electric connecting wire passes through the avoiding groove 332a, so that the electric connecting wire passes through the wire passing channel 361 and then directly penetrates out of the insulating separator 332, the arrangement of the electric connecting wire is more convenient, and the length of the electric connecting wire can be shortened.

As shown in fig. 6 and 7, in an embodiment of the present application, the second limiting groove 352 is open in a radial direction of the magnetic conductive member 35, the magnetic conductive member 35 is provided in plural, a first magnetic conductive member 35 of the plurality of magnetic conductive members 35 is adjacent to the second magnetic conductive member 35, and an opening direction of the second limiting groove 352 on the first magnetic conductive member 35 is opposite to an opening direction of the second limiting groove 352 on the second magnetic conductive member 35. It should be noted that the first magnetic conductive member 35 is any one of the magnetic conductive members 35, the second magnetic conductive member 35 is one of the magnetic conductive members 35 adjacent to the first magnetic conductive member 35, the second limiting groove 352 is open towards the outer side of the magnetic conductive member 35, the electrical connection line can enter the line passing channel 361 from the outer side of the second limiting groove 352, and the electrical connection line is not required to be threaded in the axial direction of the output shaft 20, so that the line passing of the electrical connection line is more convenient, in addition, the opening direction of the second limiting groove 352 on the first magnetic conductive member 35 is opposite to the opening direction of the second limiting groove 352 on the second magnetic conductive member 35, so as to make the gravity distribution of the magnetic conductive members 35 on the mounting bracket 33 more uniform, and ensure the axial coaxiality of the mounting bracket 33.

Referring to fig. 6 and 7, taking three magnetic conductive members 35 as an example, the openings of the second limiting grooves 352 in the upper and lower magnetic conductive members 35 face one side, and the opening of the second limiting groove 352 in the magnetic conductive member 35 in the middle faces the other side.

In an embodiment of the present invention, the insulating sleeve 331 and the insulating spacer 332 are integrally injection molded, so as to improve the overall structural strength of the mounting frame 33.

In an embodiment of the present application, the vibrator assembly 31 includes a permanent magnet 414, the permanent magnet 414 is a single-sided magnet, and the N-pole magnetic pole 311 and the S-pole magnetic pole 312 are located on an outer side of the vibrator assembly 31. It can be understood that the inner hole of the vibrator assembly 31 does not show a magnetic field to the outside, and the magnetic field of the vibrator assembly 31 is concentrated on the outer side surface of the vibrator assembly 31, so that the magnetic field strength of the vibrator assembly 31 can be increased, and thus the acting force of the first stator assembly 32 on the vibrator assembly 31 is increased, and the output thrust of the motor is increased.

It should be further noted that, in the vibrator component 31, two N-pole magnetic poles 311 and two S-pole magnetic poles 312 may be provided, and the N-pole magnetic poles 311 and the S-pole magnetic poles 312 are non-uniformly arranged, so as to obtain a non-uniform magnetic field; certainly, the number of the N-pole magnetic poles 311 and the S-pole magnetic poles 312 may also be selected according to actual requirements, and the number of the magnetic conductive members 35 may also be selected according to actual requirements, so that the magnetic field in the magnetic conductive members 35 may be matched with the magnetic field generated by the vibrator assembly 31, so as to provide the axial reciprocating thrust along the output shaft 20 for the vibrator assembly 31.

In some embodiments of the present application, as shown in fig. 9-12, the second drive mechanism includes a rotor assembly 41 and a second stator assembly 42. The rotor assembly 41 is sleeved on the output shaft 20, and the rotor assembly 41 comprises rotor magnetic poles; the second stator assembly 42 includes a stator core 421 and a second coil winding 422, and the second coil winding 422 is wound around the stator core 421. When the second coil winding 422 is energized, the driving rotor assembly 41 drives the output shaft 20 to rotate around the axial direction of the output shaft 20 in a reciprocating manner.

More specifically, the rotor assembly 41 includes a plurality of rotor magnet portions 411 arranged around the circumference of the output shaft 20, each rotor magnet portion 411 has a rotor magnetic pole, the polarities of the rotor magnetic poles of two adjacent rotor magnet portions 411 are opposite, the stator core 421 includes a plurality of stator teeth 421b distributed around the circumference of the rotor assembly 41, a stator slot 421a is formed between two adjacent stator teeth 421b, the second coil winding 422 is wound on the plurality of stator teeth 421b and located in the stator slot 421a, one end of the stator teeth 421b facing the rotor assembly 41 generates a plurality of first stator magnetic poles, and the polarities of the two adjacent first stator magnetic poles are opposite, and the plurality of first stator magnetic poles interact with the plurality of rotor magnetic poles to drive the rotor assembly 41 and the output shaft 20 to rotate around the axial direction of the output shaft 20 in a reciprocating manner.

It should be noted that, the rotor assembly 41 is fixedly connected to the output shaft 20, and is configured to drive the output shaft 20 and the rotor assembly 41 to move synchronously, the second stator assembly 42 is configured to drive the rotor assembly 41 to vibrate, and the second coil winding 422 is wound around the plurality of stator teeth 421b, and the second coil winding 422 is accommodated in the stator slot 421a, which is beneficial to reducing the volume of the motor, and further improves the magnetic energy density of the second stator assembly 42. The second coil winding 422 may be a three-phase winding or other types of windings, which is not limited in this embodiment.

It should be further noted that, the rotor assembly 41 has a plurality of rotor magnet portions 411 distributed along the circumferential direction of the output shaft 20, each rotor magnet portion 411 has a rotor magnetic pole, because there are a plurality of rotor magnet portions 411, there are also a plurality of rotor magnetic poles, and the plurality of rotor magnetic poles are distributed along the axial direction of the output shaft 20, which is beneficial to improving the torque when the rotor assembly 41 is driven by the second stator assembly 42, the polarities of the rotor magnetic poles of two adjacent rotor magnet portions 411 are opposite, so that the rotor assembly 41 and the second stator assembly 42 can form a multi-point and multi-position magnetic interaction, which is beneficial to improving the response speed of starting vibration when the rotor assembly 41 is driven by the second stator assembly 42, that is, after the second stator assembly 42 starts to work, the rotor assembly 41 can quickly start to vibrate in the circumferential direction.

Referring to fig. 12 and 13, the stator core 421 is sleeved around the rotor winding 12, that is, the rotor assembly 41 is inserted into the stator core 421, so that the motor has a compact structure. Referring to fig. 14, the stator core 421 includes a plurality of stator teeth 421b distributed around the circumference of the rotor assembly 41, a stator slot 421a is formed between two adjacent stator teeth 421b, and the second coil winding 422 is wound on the plurality of stator teeth 421b and located in the stator slot 421a, that is, by winding the second coil winding 422 on the plurality of stator teeth 421b and accommodating the second coil winding 422 in the stator slot 421a, the volume of the motor is reduced, and the magnetic energy density of the second stator assembly 42 is further improved. The second coil winding 422 may be a three-phase winding or other types of windings, which is not limited in this embodiment.

The second drive mechanism 40 of the above embodiment operates as follows: when the second coil winding 422 is energized, one end of the stator tooth 421b facing the rotor assembly 41 generates a plurality of first stator magnetic poles, and the polarities of two adjacent first stator magnetic poles are opposite, and the plurality of first stator magnetic poles interact with the plurality of rotor magnetic poles to drive the rotor assembly 41 and the output shaft 20 to rotate around the axial direction of the output shaft 20 in a reciprocating manner, so as to realize circumferential vibration; it can be understood that, in order to realize the circumferential vibration of the rotor assembly 41, the second coil winding 422 needs to be energized with alternating current, and the polarity of the first stator magnetic pole is changed at different times, so as to change the magnetic action relationship between the first stator magnetic pole and the rotor magnetic pole, for example, for a specific first stator magnetic pole, the magnetic attraction action is performed on the adjacent rotor magnetic pole, and the result is represented as driving the rotor magnet portion 411 with the rotor magnetic pole to rotate clockwise through the magnetic attraction action, and at the next time, due to the change of the current direction in the second coil winding 422, the same first stator magnetic pole performs the repulsion action on the same rotor magnetic pole at this time, and the result is represented as driving the rotor magnet portion 411 with the rotor magnetic pole to rotate counterclockwise through the magnetic repulsion action; and because there are a plurality of rotor magnetic poles and a plurality of first stator magnetic poles, a plurality of rotor magnetic poles and a plurality of first stator magnetic poles interact, a plurality of first stator magnetic poles can give a plurality of rotor magnetic poles stronger magnetic attraction or magnetic repulsion force to drive output shaft 20 and rotor subassembly 41 to reciprocate powerfully, and then output shaft 20 can drive the load vibration.

Based on the above embodiments, it can be known that the second stator assembly 42 of the motor of the present application is disposed around the rotor assembly 41, that is, the motor belongs to an inner rotor motor, and the rotor magnet portion 411 having permanent magnetism rather than electromagnetism is disposed on the rotor assembly 41, and the second coil winding 422 is disposed on the second stator assembly 42, and the rotor assembly 41 is driven to realize circumferential vibration by changing the current flow of the second coil winding 422.

In an embodiment of the present application, the number of the rotor magnet portion 411, the stator teeth 421b, and the first stator magnetic pole may be six.

Referring to fig. 15, in some embodiments, the rotor assembly 41 includes a first magnetic ring 412, the first magnetic ring 412 is sleeved on the output shaft 20, the first magnetic ring 412 is configured to be magnetized in a multi-pole magnetizing manner along an outer diameter of the first magnetic ring 412 to form a plurality of rotor magnet portions 411 on an outer circumferential wall of the first magnetic ring 412, and each rotor magnet portion 411 has a rotor magnetic pole, that is, the first magnetic ring 412 has a plurality of rotor magnetic poles distributed along a circumferential direction of the first magnetic ring 412 by radially magnetizing the first magnetic ring 412, so that the first magnetic ring 412 has a permanent magnetic property, and the first magnetic ring 412 has advantages of simple structure and low cost compared to rotor assemblies 41 of other structure types. And the polarities of the two adjacent rotor magnet portions 411 are opposite and include a south pole and a north pole, in the first magnetic ring 412, the magnetic induction lines are directed to the two adjacent north poles from the south pole, so that the number of rotor magnetic poles on the first magnetic ring 412 can be increased according to actual conditions, and further the magnetic energy density of the rotor assembly 41 is improved.

Referring to fig. 10 and 11, in other embodiments, the rotor assembly 41 includes a socket 413 and a permanent magnet 414, the socket 413 is sleeved on the output shaft 20 to realize a fixed connection with the output shaft 20, an outer peripheral wall of the socket 413 has a plurality of spaced mounting grooves 412a, the permanent magnet 414 has permanent magnetism for forming a rotor magnet portion 411, and the permanent magnets 414 are mounted in the mounting grooves 412a in a one-to-one correspondence manner, each permanent magnet 414 includes an inner end and an outer end that are disposed opposite to each other, the inner end is mounted in the mounting groove 412a to realize a stable connection between the permanent magnet 414 and the socket 413, the outer end is located outside the mounting groove 412a to be closer to the stator core 421, and the outer end is used for a rotor magnetic pole to realize a close-range induction between the rotor magnetic pole and the first stator magnetic pole of the stator core 421, thereby improving an induction sensitivity. And the polarities of the two adjacent external ends are opposite, so that the number of rotor magnetic poles with different polarities can be increased, and the sensitivity of magnetic induction with the second stator assembly 42 is improved.

Referring to fig. 12 and 13, further, the second stator assembly 42 further includes a first support 423, the first support 423 is disposed between the stator core 421 and the second coil winding 422, and the first support 423 is an insulating member to insulate the stator core 421 from the second coil winding 422, so as to prevent the second coil winding 422 and the stator core 421 from being directly short-circuited, and ensure that the second coil winding 422 can normally transmit magnetic energy generated by the alternating current to the stator core 421.

Specifically, the first bracket 423 may be integrally injection molded with the stator core 421, thereby simplifying a production process and reducing production cost. Or, the first support 423 may also include two independent sleeving parts (not numbered in the figure), the two sleeving parts are respectively sleeved at two ends of the stator core 421 in the axial direction of the output shaft 20, the second coil winding 422 is wound on the two sleeving parts in a reciprocating manner, and the second coil winding 422 and the stator core 421 can be in an interval state without being in direct contact, so that insulation between the first support 423 and the stator core 421 is ensured, and thus, material consumption of the first support 423 can be reduced, and material consumption cost is reduced.

Referring to fig. 16, in some embodiments, an inner wall surface of the first bracket 423 facing the rotor assembly 41 has one of a limiting portion 412b and a third limiting groove 423a, an outer wall surface of the rotor assembly 41 facing the first bracket 423 has the other of the limiting portion 412b and the third limiting groove 423a, for example, the other of the limiting portion 412b and the third limiting groove 423a is disposed on the first magnetic ring 412, the socket body 413, or the permanent magnet 414, and the limiting portion 412b is located in the third limiting groove 423a and can rotate around the axial direction of the output shaft 20 in a range defined by the third limiting groove 423a to limit the reciprocating rotation angle of the output shaft 20, so as to prevent the reduction of the vibration frequency due to an excessively large rotation angle of the output shaft 20. Specifically, the limiting part 412b may be a limiting block or a limiting protrusion, which is not limited in this embodiment.

Referring to fig. 17, in some embodiments, the stator teeth 421b include a winding portion 421c, an internal tooth portion 421d, and an external tooth portion 421e, the second coil winding 422 is wound around the winding portion 421c, the internal tooth portion 421d is connected to an end of the winding portion 421c facing the rotor assembly 41, the external tooth portion 421e is connected to an end of the winding portion 421c facing away from the rotor assembly 41, two adjacent winding portions 421c are disposed at an interval, and a dimension of each of the internal tooth portion 421d and the external tooth portion 421e in the circumferential direction of the output shaft 20 is greater than a dimension of each of the winding portion 421c in the circumferential direction of the output shaft 20, so as to form a stator slot 421a, and since a dimension of each of the internal tooth portion 421d and the external tooth portion 421e in the circumferential direction of the output shaft 20 is greater than a dimension of each of the winding portion 421c in the circumferential direction of the output shaft 20, after the second stator assembly 42 is wound around the winding portion 421c, the internal tooth portion 421d and the external tooth portion 421e can prevent the second coil winding 422 from departing from the stator core 421c in the radial direction of the stator core 421c, so as to improve stability of the second coil winding on the stator core 421 c.

With reference to fig. 17, in some embodiments, two adjacent internal tooth portions 421d extend toward each other, and the multiple internal tooth portions 421d enclose the cylindrical space 21 for accommodating the rotor assembly 41 and the output shaft 20, so as to not only facilitate magnetic induction between the internal tooth portions 421d and the rotor poles of the rotor assembly 41, but also ensure that the rotor assembly 41 rotates inside the stator core 421 without hindrance.

With continued reference to fig. 17, each stator tooth 421b further includes a connecting portion 421f, two adjacent internal tooth portions 421d are connected and fixed by one or more connecting portions 421f, so that the internal tooth portions 421d are connected together by the connecting portion 421f, each internal tooth portion 421d is connected to one external tooth portion 421e by one winding portion 421c, the internal tooth portions 421d, the winding portions 421c, and the external tooth portions 421e are connected and fixed together without excessive displacement therebetween, which facilitates winding of the second coil winding 422 on the stator core 421, and when two adjacent internal tooth portions 421d are connected by a plurality of spaced connecting portions 421f, the connection stability between two adjacent internal tooth portions 421d can be improved, and since the connecting portion 421f is not completely filled between two adjacent internal tooth portions 421d, not only can the material cost be reduced, but also the heat dissipation of the second coil winding 422 through the spaces between the connecting portions 421f is facilitated.

Similarly, two adjacent external teeth portions 421e can also be connected by one or more connecting portions 421f, so that the external teeth portions 421e are connected by the connecting portions 421f, each external teeth portion 421e is connected by one internal teeth portion 421d, the external teeth portions 421e, the winding portions 421c, and the external teeth portions 421e are connected and fixed together without excessive displacement therebetween, so that the second coil winding 422 is wound on the stator core 421, when two adjacent external teeth portions 421e are connected by the connecting portions 421f, the connection stability between the adjacent external teeth portions 421e can be improved, and since the connecting portions 421f are not completely filled between two adjacent external teeth portions 421e, the material cost can be reduced, and heat dissipation of the second coil winding 422 through the intervals between the connecting portions 421f can be facilitated.

With reference to fig. 17, each stator tooth 421b further includes two magnetic gathering portions 421g, each magnetic gathering portion 421g is configured to gather magnetic energy generated by the stator core 421 inducing the alternating current of the second coil winding 422 at a position thereof, and the two magnetic gathering portions 421g are respectively disposed at two ends of the internal tooth portion 421d in the circumferential direction of the output shaft 20 and are protruded from the internal tooth portion 421d to the output shaft 20, so as to shorten a distance between the internal tooth portion 421d and the rotor assembly 41, so that the internal tooth portion 421d more effectively induces the rotor magnetic pole of the rotor assembly 41, thereby improving a utilization rate of the magnetic energy generated by the second stator assembly 42, and further reducing energy consumption of the motor.

Further, the reciprocating rotation angle of the output shaft 20 is not less than 4 degrees and not more than 5 degrees, so that the electric energy inputted to the motor can be converted into the vibration of a higher frequency, and when the motor is applied to the electric toothbrush, a better oral cleaning effect can be obtained.

In some embodiments, the number of the rotor magnet portions 411 is N, N is an even number greater than or equal to 6, the number of the first stator magnetic poles generated when the second coil winding 422 is energized is M, and M is an even number greater than or equal to 6, so that the rotor assembly 41 has more rotor magnetic poles, and the second coil winding 422 also has more first stator magnetic poles, which can increase the magnetic energy density of the motor, and further reduce the volume of the motor, and the number of the magnets forming the rotor magnet portions 411 can also be reduced under the condition of the same output driving force, thereby saving the material cost of the rotor assembly 41. It is understood that the number of the rotor magnet portions 411 may be the same as or different from the number of the first stator magnetic poles.

Specifically, the brand of the rotor magnet portion 411 is greater than or equal to N35, according to the related art, the larger the brand of the magnet is, the higher the cost is, in order to meet the driving performance of the motor in the related art, the magnet brand is higher, the cost is also higher, and the motor of the embodiment of the application can reduce the brand of the rotor magnet portion 411 due to high magnetic energy density, and the brand of the rotor magnet portion 411 only needs to be greater than or equal to N35, so that the manufacturing cost of the motor can be effectively reduced.

In an embodiment of the present application, the rotor assembly 41 and the second stator assembly 42 are spaced apart from each other in the radial direction of the output shaft 20, and the distance between the connecting member 54 and the end cover 53 is greater than the distance between the rotor assembly 41 and the second stator assembly 42, so that the end cover 53 and the connecting member 54 can be more effectively prevented from colliding with each other.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (16)

1. A motor, comprising:

a housing having an accommodating chamber;

the output shaft, some of the said output shaft stretches into the said accommodating cavity, another part stretches out of the said accommodating cavity;

the first driving mechanism is positioned in the accommodating cavity and is used for driving the output shaft to reciprocate along the axial direction of the output shaft;

the second driving mechanism is positioned in the accommodating cavity and is used for driving the output shaft to rotate around the axial direction of the output shaft in a reciprocating manner;

the limiting assembly is provided with at least one group and comprises a bearing, an elastic piece and an end cover; the bearing is sleeved on the output shaft, the end cover is arranged around the periphery of the bearing and connected with the shell, the elastic part is connected with the outer ring of the bearing and the end cover, the bearing follows the output shaft, and when the bearing reciprocates along the axial direction of the output shaft relative to the end cover, the elastic part generates elastic deformation in the axial direction of the output shaft; the inner ring of the bearing follows the output shaft, and when the inner ring of the bearing rotates around the axial direction of the output shaft in a reciprocating mode relative to the end cover and the outer ring of the bearing, the elastic piece generates elastic deformation in the circumferential direction of the output shaft.

2. The motor of claim 1, wherein the elastic member is spaced from the end cap and from the first drive mechanism and the second drive mechanism in an axial direction of the output shaft, and an amplitude of the output shaft is smaller than a spacing between the elastic member and the first drive mechanism at an equilibrium position, the elastic member and the second drive mechanism at an equilibrium position, and the elastic member and the end cap at an equilibrium position.

3. The motor according to claim 1, wherein the elastic member is located in the accommodation chamber, and an opening penetrating the elastic member in an axial direction of the output shaft is provided in the elastic member.

4. The motor of claim 1, wherein the elastic member is a leaf spring, and the elastic member extends spirally around the axial direction of the output shaft to form a spiral structure.

5. The motor of claim 1, wherein two sets of the limiting assemblies are disposed, and the two sets of the limiting assemblies are disposed at two opposite ends of the housing, respectively, and two of the elastic members of the two sets of the limiting assemblies are symmetrically distributed about a central point of the housing.

6. The motor of claim 1, wherein the bearing follows the output shaft with a maximum displacement distance relative to the end cap toward the receiving cavity of less than or equal to 1 millimeter; the bearing follows the output shaft, and the maximum displacement distance from the end cover to the end cover far away from the accommodating cavity is less than or equal to 1 millimeter.

7. The motor of claim 1, wherein the stop assembly further comprises:

the connecting piece is positioned between the inner wall of the end cover and the outer ring of the bearing, the outer ring of the bearing is connected with the elastic piece through the connecting piece, and the connecting piece can move back and forth along the axial direction of the output shaft relative to the end cover along with the bearing and the output shaft.

8. The motor of claim 7, wherein the connecting member and the end cap are spaced apart from each other in a radial direction of the output shaft, and a clearance for the connecting member to swing is provided between an outer side wall of the connecting member and an inner side wall of the end cap.

9. The motor of claim 8, wherein a spacing between an outer side wall of the connector and an inner side wall of the end cap is greater than 0.1 millimeters.

10. The motor of claim 1, wherein the first drive mechanism comprises:

the vibrator component is sleeved on the output shaft and is connected with the output shaft, and the vibrator component is provided with a plurality of N-pole magnetic poles and S-pole magnetic poles which are alternately arranged along the axial direction of the output shaft;

the first stator assembly comprises a mounting frame and a plurality of first coil windings, the mounting frame is arranged around the periphery of the vibrator assembly and is connected with the shell, the first coil windings are mounted on the mounting frame and are arranged around the periphery of the output shaft, and the first coil windings are arranged at intervals along the axial direction of the output shaft;

magnetic conduction spare is located adjacent two between the first coil winding, magnetic conduction spare install in the mounting bracket and set up in all sides of output shaft, when first coil winding is not switched on, every magnetic conduction spare all corresponds to the N utmost point magnetic pole with the juncture of S utmost point magnetic pole, when first coil winding is switched on, adjacent two the flow direction of the electric current that first coil winding inserts is opposite, in order to drive the oscillator subassembly and the output shaft is followed the axial reciprocating motion of output shaft.

11. The motor of claim 1, wherein the second drive mechanism comprises:

the rotor assembly is sleeved on the output shaft and comprises a rotor magnetic pole;

the second stator assembly comprises a stator core and a second coil winding, and the second coil winding is wound on the stator core;

when the second coil winding is electrified, the rotor assembly is driven to drive the output shaft to rotate around the axial direction of the output shaft in a reciprocating mode.

12. The motor of claim 11, wherein the second drive mechanism further comprises:

the first support is arranged between the stator core and the second coil winding and is an insulating part so as to insulate the stator core from the second coil winding.

13. The motor of claim 12, wherein the first bracket is injection molded integrally with the stator core; or

The first support comprises two independent sleeving parts which are respectively sleeved at two ends of the stator core in the axial direction of the output shaft.

14. The motor of claim 11, wherein the rotor assembly is spaced radially from the second stator assembly by a distance, the spacing assembly further comprising:

the connecting piece is positioned between the inner wall of the end cover and the outer ring of the bearing, the outer ring of the bearing is connected with the elastic piece through the connecting piece, and the connecting piece can follow the bearing and the output shaft and can reciprocate relative to the end cover along the axial direction of the output shaft;

the connecting piece and the end cover are arranged at a radial interval of the output shaft, and the distance between the connecting piece and the end cover is larger than the distance between the rotor assembly and the second stator assembly.

15. The motor of claim 1, wherein the end of the output shaft extending out of the accommodating cavity is an output end, the first driving mechanism and the second driving mechanism are arranged along the axial direction of the output shaft, and the first driving mechanism is located on the side of the second driving mechanism close to the output end.

16. An electric toothbrush comprising a handle, a head and a motor as claimed in any one of claims 1 to 15;

the shell is arranged in the brush handle, one end of the output shaft is arranged in the brush handle, and the other end of the output shaft penetrates through the brush handle and is positioned outside the brush handle; the brush head and one end of the output shaft, which is positioned outside the brush handle, are detachably connected.

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