CN218771710U - Motor, tooth flushing device and electric toothbrush - Google Patents

Abstract

The application discloses a motor, a tooth flushing device and an electric toothbrush, wherein the motor comprises a shell, an output shaft and a first driving mechanism; the first driving mechanism comprises a vibrator assembly and a first stator assembly, wherein the vibrator assembly 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, and the first coil windings are mounted on the mounting frame and are arranged around the periphery of the output shaft; when the first coil winding is electrified, the flow directions of currents accessed by the two adjacent first coil windings are opposite to drive the vibrator assembly and the output shaft to reciprocate along the axial direction of the output shaft. Kinetic energy loss can be reduced.

Description

Motor, tooth flushing device and electric toothbrush

Technical Field

The application relates to the technical field of driving equipment, in particular to a motor, a tooth flushing device and an electric toothbrush.

Background

In an apparatus which needs to use a motor as a driving device to realize linear motion, the motor and a driven member generally need to be connected through a transmission mechanism such as a gear assembly to convert the rotation of the output shaft of the motor into the linear motion of the driven member.

However, the kinetic energy output by the motor is transmitted to the driven member via the transmission mechanism, and the kinetic energy is lost greatly.

SUMMERY OF THE UTILITY MODEL

The application provides a motor, towards tooth ware and electric toothbrush can reduce the kinetic energy loss.

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 first driving mechanism comprises a vibrator assembly and a first stator assembly, the vibrator assembly is sleeved on the output shaft and is connected with the output shaft, and the vibrator assembly 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 peripheral side 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 peripheral side of the output shaft, and the first coil windings are arranged at intervals along the axial direction of the output shaft; wherein, adjacent two be provided with the magnetic conduction piece between the first coil winding, the magnetic conduction piece install in the mounting bracket and set up in all sides of output shaft, when first coil winding is not switched on, every the magnetic conduction piece 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 with the output shaft is followed the axial reciprocating motion of output shaft.

In a second aspect, the present application further provides a dental irrigator, comprising a pump body and a motor; the pump body comprises a cylinder sleeve and a piston assembly, the cylinder sleeve is provided with a fluid cavity, the piston assembly is installed in the fluid cavity and connected with the end part of the output shaft, and the output shaft is used for driving the piston assembly to do reciprocating motion in the fluid cavity along the axial direction of the output shaft so as to change the state of the flow path of the cylinder sleeve.

In a third aspect, the present application also provides an electric toothbrush comprising 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 out of 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: the output shaft of motor can directly be linear motion, when using the motor as the drive device in order to realize being linear motion by the driving piece, can be with being driven direct and output shaft connection by the driving piece, the output shaft can drive when being linear motion and directly be linear motion by the driving piece, the motor with need not be connected through drive mechanism such as gear assembly between the driving piece, in addition, the magnetic drive power between first stator subassembly and first stator subassembly is used as output shaft linear motion's thrust, the motion conversion is more direct and high-efficient, thereby can reduce the kinetic energy loss, improve the output thrust of motor, and can eliminate the noise that drive mechanism during operation produced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies, 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 the drawings without creative efforts.

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

FIG. 2 is a schematic structural diagram of a mounting bracket according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a first stator assembly in a first perspective in accordance with one embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a first stator assembly from a second perspective in accordance with an embodiment of the present disclosure;

fig. 5 is a schematic structural view of a magnetic conductive member according to an embodiment of the present application;

FIG. 6 is a schematic view of a motor according to another embodiment of the present application;

FIG. 7 is a schematic view of a motor with a housing removed according to one embodiment of the present disclosure;

FIG. 8 is an exploded view of a second drive mechanism according to one embodiment of the subject application;

FIG. 9 is a schematic structural view of a rotor assembly according to an embodiment of the present application;

FIG. 10 is a schematic structural view of a second stator assembly according to one embodiment of the present application;

figure 11 is an exploded view of a second stator assembly according to one embodiment of the present application;

fig. 12 is a schematic structural view of a stator core according to an embodiment of the present application;

FIG. 13 is an exploded view of a second drive mechanism according to yet another embodiment of the present application;

FIG. 14 is a schematic cross-sectional view taken along a radial plane of a motor with a housing removed according to one embodiment of the present application;

fig. 15 is a schematic structural view of a stator core according to another embodiment of the present application;

FIG. 16 is a schematic view of a dental irrigator according to an 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; 60. a pump body; 61. a cylinder liner; 611. a fluid chamber; 62. a piston assembly; 621. a piston; 621a, a positioning groove; 622. and (5) sealing rings.

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 detailed description and specific examples, while indicating the present application, are given by way of illustration only.

The application provides a motor, towards tooth ware and electric toothbrush to solve the kinetic energy of motor output from transmitting to driven piece via drive mechanism, kinetic energy loss great problem.

The first embodiment is as follows:

in the first embodiment of the present application, as shown in fig. 1, a motor includes a housing 10, an output shaft 20, and a first driving mechanism 30. 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 drive mechanism 30 is located in the accommodating chamber 11 and is configured to drive the output shaft 20 to reciprocate in the axial direction of the output shaft 20.

Specifically, the first driving mechanism 30 includes a vibrator assembly 31 and a first stator assembly 32, the vibrator assembly 31 is sleeved on the output shaft 20 and connected with 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 the 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.

Wherein, be provided with magnetic conduction piece 35 between two adjacent first coil winding 34, magnetic conduction piece 35 installs in mounting bracket 33 and sets up in the week side of output shaft 20, when first coil winding 34 did not switch on, every magnetic conduction piece 35 all is corresponding to the juncture of N utmost point magnetic pole 311 and S utmost point magnetic pole 312, and when first coil winding 34 switched on, the flow direction of the electric current that two adjacent first coil winding 34 switched on was opposite to drive oscillator subassembly 31 and output shaft 20 along the axial reciprocating motion of 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. 1, 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. 1, X represents that the current direction of the first coil winding 34 is perpendicular to the paper surface; represents the direction of current flow of the first coil winding 34 out of the plane of the drawing; during the upper half of the energization, the direction of current flow in the first coil winding 34 is as shown in fig. 1 (commutation during the lower half cycle); 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. 1, 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. 1 and 2, mounting bracket 33 includes an insulating sleeve 331 and an insulating spacer 332; an insulating sleeve 331 is 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 conductive 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 to one, and the magnetic conductive member 35 is installed in the magnetic conductive accommodating groove 334 and corresponds to the magnetic conductive accommodating groove 334 one to 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. 2 to 5, 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 limiting members 331c, the plurality of first 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 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 application, the outer side surface of the magnetic conducting member 35 is further provided with a second limiting groove 352, the magnetic conducting accommodating groove 334 is provided with a second limiting member 36 connected with the insulating spacer 332, 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 may pass through the wire passing channel 361 reserved on the second limiting member 36, so as to realize the mutual series connection of the first coil winding 34, and in addition, the wire passing channel 361 may accommodate the electrical connection line and limit the electrical connection line, so as to avoid the line arrangement in the accommodating cavity from being too messy to cause the line winding.

Furthermore, the insulation spacer 332 is provided with a avoiding groove 332a communicated with the wire passage 361, and the electrical connection wire passes through the avoiding groove 332a, so that the electrical connection wire passes through the wire passage 361 and then directly passes out of the insulation spacer 332, the arrangement of the electrical connection wire is more convenient, and the length of the electrical connection wire can be shortened.

As shown in fig. 3 and fig. 4, 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 members 35 are provided in plural numbers, the first magnetic conductive member 35 and the second magnetic conductive member 35 in the plurality of magnetic conductive members 35 are adjacent, 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. 3 and 4, 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 that the overall structural strength of the mounting frame 33 can be improved.

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 both located on the outer side surface 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; of course, 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 vibrator assembly 31 with the axial reciprocating thrust along the output shaft 20.

Example two:

the first embodiment of the present application provides a motor, and the second embodiment differs from the first embodiment only in that the motor further includes a second driving structure 40.

Specifically, as shown in fig. 6 and 7, the second driving mechanism 40 is located in the accommodating chamber 11 and is configured to drive the output shaft 20 to rotate back and forth around the axial direction of the output shaft 20.

Specifically, as shown in fig. 8 to 10, 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 includes 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. 10 and 11, 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. 12, 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, the second coil winding 422 is wound on the plurality of stator teeth 421b, so that the second coil winding 422 is received in the stator slot 421a, which is beneficial to reducing the volume of the motor, and further improving 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.

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 supplied 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, an attraction effect is exerted on the adjacent rotor magnetic pole at this time, and the result is that the rotor magnet portion 411 having the rotor magnetic pole is driven to rotate clockwise by the magnetic attraction effect, 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 exerts a repulsion effect on the same rotor magnetic pole at this time, and the result is that the rotor magnet portion 411 having the rotor magnetic pole is driven to rotate counterclockwise by the magnetic repulsion effect; 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 seen that the second stator assembly 42 of the motor of the present invention 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 one embodiment of the present application, the number of the rotor magnet portions 411, the number of the stator teeth 421b, and the number of the first stator magnetic poles may be six.

Referring to fig. 13, 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 along an outer diameter of the first magnetic ring 412 in a multi-pole magnetizing manner 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 permanent magnetism, and the first magnetic ring 412 has advantages of simple structure and low cost compared with 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, and in the first magnetic ring 412, the magnetic induction lines point 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 situations, and further the magnetic energy density of the rotor assembly 41 is improved.

Referring to fig. 8 and 9, 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, the outer peripheral wall of the socket 413 has a plurality of spaced mounting grooves 412a, the permanent magnet 414 has permanent magnetism for forming the rotor magnet portion 411, the permanent magnets 414 are mounted in the mounting grooves 412a in a one-to-one correspondence manner, each permanent magnet 414 includes an internal end and an external end that are opposite to each other, the internal end is mounted in the mounting groove 412a to realize a stable connection between the permanent magnet 414 and the socket 413, the external end is located outside the mounting groove 412a to be closer to the stator core 421, and the external 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. 10 and 11, 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 from being directly short-circuited with the stator core 421, 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 bracket 423 may also include two independent sleeving parts (not numbered in the drawing), the two sleeving parts are respectively sleeved at two ends of the stator core 421 in the axial direction of the output shaft 20, and the second coil winding 422 is wound on the two sleeving parts in a reciprocating manner, so that the second coil winding 422 and the stator core 421 are in a spaced state and are not in direct contact, thereby ensuring insulation between the first bracket 423 and the stator core 421, and thus, material consumption of the first bracket 423 may be reduced, and material consumption cost may be reduced.

Referring to fig. 14, 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 reciprocating manner within a range defined by the third limiting groove 423a to limit a reciprocating rotation angle of the output shaft 20, so as to prevent the output shaft 20 from rotating by an excessively large angle to reduce a vibration frequency. Specifically, the limiting part 412b may be a limiting block or a limiting protrusion, and the embodiment does not limit this.

Referring to fig. 15, 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 the 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 the dimension of each of the winding portion c 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 separating from the stator core 421c in the radial direction of the stator core 421c, thereby improving stability of the second coil winding 422 wound around the stator core 421 c.

Referring to fig. 15, in some embodiments, two adjacent internal tooth portions 421d extend toward each other, and the plurality of internal tooth portions 421d define a cylindrical space 21 for accommodating the rotor assembly 41 and the output shaft 20, so that the internal tooth portions 421d perform magnetic induction with the rotor magnetic poles of the rotor assembly 41, and the rotor assembly 41 can be ensured to rotate in the stator core 421 without obstruction.

With continued reference to fig. 15, 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. 15, 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 input to the motor can be converted into the vibration of a higher frequency, and when the motor is applied to the electric toothbrush, the oral cavity cleaning effect is better.

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 can reduce the volume of the motor under the condition of the same output driving force, and the brand number of the magnet constituting the rotor magnet portions 411 can also be reduced, thereby saving the material cost of the rotor assembly 41. It is understood that the number of the rotor magnet portions 411 and the number of the first stator magnetic poles may be the same or different.

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 satisfy the driving performance of the motor in the related art, the magnet brand is higher, and the cost is also higher, and the motor of the embodiment of the present application can reduce the brand of the rotor magnet portion 411 because the magnetic energy density is high, 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.

Example three:

in the third embodiment of the present application, there is provided a dental irrigator, as shown in fig. 16, which includes a pump body 60 and a motor according to any one of the first embodiment; the pump body 60 includes a cylinder sleeve 61 and a piston assembly 62, the cylinder sleeve 61 has a fluid cavity 611, the piston assembly 62 is installed in the fluid cavity 611 and connected with the end of the output shaft 20, and the output shaft 20 is used for driving the piston assembly 62 to reciprocate along the axial direction of the output shaft 20 in the fluid cavity 611 so as to change the state of the flow path of the cylinder sleeve 61.

It can be understood that the cylinder sleeve 61 provides radial restraint for the piston assembly 62 and retains the freedom of axial movement of the piston assembly 62, the cylinder sleeve 61 has at least one inlet and one outlet, both of which are communicated with the fluid chamber 611, and when the first driving mechanism 30 drives the output shaft 20 to move axially along the output shaft 20, the state of the flow path of the cylinder sleeve 61 can be changed, so as to realize the suction and discharge of water. Taking the case that the inlet is opened and the outlet is closed when the piston assembly 62 moves away from the motor, the inlet is opened and the outlet is closed, and the pump body 60 pumps the liquid into the fluid cavity 611 through the inlet; when the piston assembly 62 moves closer to the motor, the inlet is closed and the outlet is opened, the pump body 60 discharges the fluid out of the fluid chamber 611 through the outlet, and the specific working principle of the pump body 60 is disclosed in the related art and is not described in detail herein.

In one embodiment of the present application, the piston assembly 62 includes a piston 621 and a seal ring 622; a positioning groove 621a is arranged on the outer side surface of the piston 621; the sealing ring 622 is sleeved on the piston 621 and located in the positioning groove 621a, and the outer side surface of the sealing ring 622 abuts against the inner side wall of the cylinder sleeve 61. The sealing ring 622 may be a rubber ring, and the sealing ring 622 seals a gap between the piston 621 and the cylinder liner 61.

Further, lubricating grease can be coated on the inner wall of the cylinder sleeve 61 to match the piston 621 to realize reciprocating linear motion, so that friction generated when the piston 621 performs linear reciprocating motion can be reduced, mechanical noise is lower, and user experience can be improved.

In one embodiment of the present application, two pump bodies 60 are provided, and a first end of the output shaft 20 is connected to the piston assembly 62 of one pump body 60, and a second end of the output shaft 20 is connected to the piston assembly 62 of the other pump body 60, the first end and the second end being opposite to each other in the axial direction of the output shaft 20. It can be understood that, during a reciprocating motion cycle, when one pump 60 of the two pumps 60 sucks water, the other pump 60 discharges water at the same time, so that the working efficiency of the tooth irrigator can be improved.

Example four:

an embodiment four of the present application provides an electric toothbrush comprising a handle, a head, and a motor as in any of the embodiments one.

Wherein, the shell 10 is arranged in the brush handle, one end of the output shaft 20 is arranged in the brush handle, and the other end penetrates out of the brush handle and is positioned outside the brush handle; the brush head is detachably connected with one end of the output shaft 20 outside the brush handle.

Example five:

example five of the present application provides an electric toothbrush comprising a handle, a head, and a motor according to any of the second embodiments.

Wherein, the shell 10 is arranged in the brush handle, one end of the output shaft 20 is arranged in the brush handle, and the other end penetrates out of the brush handle and is positioned outside the brush handle; the brush head is detachably connected with one end of the output shaft 20 outside the brush handle.

When being applied to electric toothbrush with the motor, 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 wind axial reciprocating rotation under the drive of second actuating mechanism 40, make brush head can clean tooth of multi-angle, 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 the tooth.

The present invention is not intended to be limited to the particular embodiments shown and described, and all changes, equivalents and modifications that come within the spirit and scope of the invention are desired to be protected.

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 first driving mechanism comprises a vibrator assembly and a first stator assembly, the vibrator assembly is sleeved on the output shaft and is connected with the output shaft, and the vibrator assembly 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;

wherein, adjacent two be provided with the magnetic conduction piece between the first coil winding, the magnetic conduction piece install in the mounting bracket and set up in all sides of output shaft, when first coil winding is not switched on, every the magnetic conduction piece 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 with the output shaft is followed the axial reciprocating motion of output shaft.

2. The motor of claim 1, wherein the mounting bracket comprises:

an insulating sleeve disposed around a peripheral side of the vibrator assembly and connected with the housing, the insulating sleeve having a magnetic action cavity accommodating the vibrator assembly;

the insulation spacers are arranged around the periphery of the insulation sleeve and connected with the insulation sleeve, a plurality of insulation spacers are arranged at intervals along the axial direction of the output shaft, and a containing groove is formed between every two adjacent insulation spacers;

among the two adjacent accommodating grooves, one accommodating groove is a coil accommodating groove, the other accommodating groove is a magnetic conduction accommodating groove, the first coil winding is installed in the coil accommodating groove and is in one-to-one correspondence with the coil accommodating groove, and the magnetic conduction piece is installed in the magnetic conduction accommodating groove and is in one-to-one correspondence with the magnetic conduction accommodating groove.

3. The motor of claim 2, wherein a portion of said insulating sleeve corresponding to said magnetically permeable receiving slot has a communication opening through which said magnetically permeable receiving slot communicates with said magnetically active chamber.

4. The motor according to claim 3, wherein a portion of the insulating sleeve corresponding to the magnetic conductive receiving groove includes a plurality of first stoppers arranged at intervals around a circumferential side of the vibrator assembly, and the communication opening is formed between two adjacent first stoppers; the inner side surface of the magnetic conduction piece is provided with a first limiting groove, and the first limiting piece is inserted in the first limiting groove.

5. The motor of claim 2, wherein a second limiting groove is further disposed on an outer side surface of the magnetic conducting member, and a second limiting member connected to the insulating spacer is disposed in the magnetic conducting receiving groove, and the second limiting member is inserted into the second limiting groove.

6. The motor of claim 5, wherein a wire passage is disposed on the second limiting member, an electrical connection wire is disposed in the wire passage, and two adjacent first coil windings are connected in series through the electrical connection wire.

7. The motor as claimed in claim 6, wherein the insulation spacer is provided with a space-avoiding groove communicating with the wire passage, and the electric connection wire passes through the space-avoiding groove.

8. The motor according to claim 5, wherein the second position-limiting groove is open in a radial direction of the magnetic conductive member, the magnetic conductive member is provided in plurality, a first magnetic conductive member of the plurality of magnetic conductive members is adjacent to a second magnetic conductive member, and an opening direction of the second position-limiting groove on the first magnetic conductive member is opposite to an opening direction of the second position-limiting groove on the second magnetic conductive member.

9. The motor of claim 2, wherein the insulating sleeve is injection molded integrally with the insulating spacer.

10. The motor of claim 1, wherein the vibrator assembly comprises a permanent magnet, the permanent magnet is a single-sided magnet, and the N-pole magnetic pole and the S-pole magnetic pole are located on an outer side of the vibrator assembly.

11. The motor according to any one of claims 1 to 10, further comprising a second driving mechanism located in the housing chamber and configured to drive the output shaft to rotate back and forth about the axial direction of the output shaft; the second drive mechanism includes:

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 rotor assembly includes a plurality of rotor magnet portions arranged circumferentially around the output shaft, each rotor magnet portion having a rotor pole, the rotor poles of two adjacent rotor magnet portions having opposite polarities, the stator core includes a plurality of stator teeth distributed circumferentially around the rotor assembly, a stator slot is defined between two adjacent stator teeth, the second coil winding is wound around the plurality of stator teeth and located in the stator slot, one end of the stator tooth facing the rotor assembly generates a plurality of first stator poles, the two adjacent first stator poles have opposite polarities, and the plurality of first stator poles interact with the plurality of rotor poles to drive the rotor assembly and the output shaft to rotate back and forth axially around the output shaft.

13. A dental irrigator comprising a pump body and a motor according to any one of claims 1 to 10;

the pump body comprises a cylinder sleeve and a piston assembly, the cylinder sleeve is provided with a fluid cavity, the piston assembly is installed in the fluid cavity and connected with the end part of the output shaft, and the output shaft is used for driving the piston assembly to move in the fluid cavity along the axial reciprocating motion of the output shaft so as to change the state of the flow path of the cylinder sleeve.

14. The dental irrigator of claim 13 wherein said piston assembly comprises:

the outer side surface of the piston is provided with a positioning groove;

and the sealing ring is sleeved on the piston and is positioned in the positioning groove, and the outer side surface of the sealing ring is abutted against the inner side wall of the cylinder sleeve.

15. The dental irrigator of claim 13 wherein there are two of said pump bodies, a first end of said output shaft being connected to the piston assembly of one of said pump bodies and a second end of said output shaft being connected to the piston assembly of the other of said pump bodies, said first and second ends being axially opposed to each other of said output shaft.

16. An electric toothbrush comprising a handle, a head and a motor as claimed in claim 11 or 12;

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.

Images