CN217469728U

CN217469728U - Sound wave motor and electric toothbrush

Info

Publication number: CN217469728U
Application number: CN202221318353.2U
Authority: CN
Inventors: 林章敏; 陈彬
Original assignee: Shenzhen Chaowei System Technology Co ltd
Current assignee: Shenzhen Chaowei System Technology Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-20
Anticipated expiration: 2032-05-27

Abstract

The utility model discloses a sound wave motor and electric toothbrush, including stator, rotor and casing, the stator with the rotor is located in the casing, the stator is located the casing, the rotor is located stator periphery side, the rotor with the casing rotates to be connected, and the periphery side-spin of locating the stator through setting up the rotor for the coil of coiling does not need to set up in inside on the stator, only need around establish in the sunken wire winding inslot of stator periphery side can, changed wire-wound direction and position on the current stator core, avoided current wire-wound structure inside stator core, reduce the wire winding degree of difficulty, improve the wire winding efficiency of coil, further improve the production efficiency of motor, be particularly useful for the automated production of motor.

Description

Sound wave motor and electric toothbrush

Technical Field

The utility model belongs to sound wave motor field, in particular to sound wave motor and electric toothbrush.

Background

The sound wave motor is commonly used in the electric toothbrush, when the motor is powered on in a forward and reverse direction alternately with a certain frequency, the output shaft of the motor can do reciprocating back and forth rotation according to the frequency, for example, clockwise rotation is performed by 5 degrees, and anticlockwise rotation is performed by 5 degrees, so that brushing action is really realized, mechanical friction is not generated in the motor by the vibration principle, the stability is high, and the output power is high.

In current sound wave motor, including stator and rotor, the stator center is rotatory is located to the rotor, the stator internal surface is equipped with bellied wire casing, be used for the coiling coil, for example, in the application number is 2019208486707 the chinese utility model patent application, as shown in fig. 1, its stator core 5 is inside to set up the rotor, and stator core inner wall symmetry is equipped with two bellied wire casings of cusp, the wire casing has coil winding 6 around, the wire winding mode of this kind of stator core's structure and coil is the common structure of sound wave motor in the current electric toothbrush promptly, and because this kind of rotor has also decided the position that the coil must set up in stator core inside at the rotatory structure in stator center.

However, the above-mentioned structure of the stator and the rotor has the following problems in production and manufacture:

because stator core's wire casing is the protruding structure inside stator core, and the coil must be in the inside wire winding operation that carries out of stator core, also the winding machine is at the inside wire winding of stator core in common adoption, and this kind of wire winding mode inside the casing is because the space is narrow and small, and the inconvenient manual work of inequality or the wire winding of equipment leads to production efficiency to be lower.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sound wave motor aims at solving current sound wave motor and leads to inside wire winding to cause the lower problem of production efficiency because structural characteristic.

According to the embodiment of the application, the sound wave motor comprises a stator, a rotor and a shell, wherein the stator and the rotor are arranged in the shell, the stator is positioned on the shell, the rotor is arranged on the outer peripheral side of the stator, and the rotor is rotationally connected with the shell.

Preferably, the stator includes an iron core, and winding slots are formed in two side faces of the iron core, which are close to the rotor, and the winding slots are of an inward concave structure on the surface of the iron core; and the winding groove is wound with an enameled wire.

Preferably, the stator further includes an insulating block inserted into two ends of the core, and two ends of the insulating block abut against the inner surface of the housing.

Preferably, the rotor includes a first rotating piece, a second rotating piece and a fixed block, the first rotating piece and the second rotating piece are arranged oppositely, one end of the first rotating piece and one end of the second rotating piece are connected with the fixed block, and the fixed block is connected with the output shaft.

Preferably, a magnetic block is positioned in the fixed block, and the first rotating sheet and the second rotating sheet are respectively contacted with two side surfaces of the magnetic block; the first rotating sheet and the second rotating sheet are magnetic conductive sheets.

Preferably, an installation block is arranged at one end of the rotor, which is far away from the fixed block, and the first rotating sheet and the second rotating sheet are positioned at two ends of the installation block; an elastic sheet is positioned on the mounting block and extends in the direction far away from the fixing block; the shell is provided with a rubber cover corresponding to the position of the elastic sheet, the rubber cover is provided with an insertion groove, and the elastic sheet is inserted in the insertion groove.

Preferably, the housing is provided with a containing groove at one end of the output shaft, a bearing is positioned in the containing groove, and the output shaft penetrates through the bearing.

The utility model also provides an electric toothbrush, its adoption as above-mentioned arbitrary sound wave motor.

Compared with the prior art, the utility model provides a pair of sound wave motor and electric toothbrush has following beneficial effect:

1. the periphery side that locates the stator through setting up the rotor is rotatory for the coil of coiling need not set up in inside on the stator, only need around establish in the sunken wire winding inslot of stator periphery side can, changed wire-wound direction and position on the current stator core, avoided current at the inside wire-wound structure of stator core, reduce the wire winding degree of difficulty, improve the wire winding efficiency of coil, further improve the production efficiency of motor, be particularly useful for the automated production of motor.

2. Through setting up the both ends that the insulating block pegged graft the iron core for when the insulating block is insulating between with enameled wire and the iron core, hold the effect through supporting of insulating block and fix a position in the casing, realize insulating and locate function simultaneously.

3. Through setting up first rotor plate, second rotor plate both ends location on the fixed block, make the utility model discloses the rotor structure who sets up in the stator outside can be rotatory in the stator outside based on two rotor plates to through the outside transmission of fixed block, connection structure between rotor and the stator has been simplified to this kind of structure, and the rotor has bigger rotation space, the staff's of being more convenient for operation when maintenance or equipment. And simultaneously, compare in traditional motor, the utility model provides an external rotor structure has bigger air gap radius, under the motor inner space of the same volume, the utility model discloses an external rotor structure has bigger air gap radius, and the torsion of motor output is bigger.

4. Through setting up first rotor plate, second rotor plate into magnetic conduction piece to set up the magnetic path on the fixed block, two rotor plates contact the different magnetic poles of magnetic path respectively, make two rotor plates can realize taking the magnetic structure through a standard magnet piece, need not customize the rotor plate structure of special shape. Especially among the current sound wave motor, the location has polylith sintering neodymium iron boron magnet on the rotor, occupies whole motor more than 30% cost, and the working face customization is processed into the arc, manufacturing cost and process time cost are higher, and the structure that this application passes through the magnetic path and connects the magnetic conduction piece can directly reduce the use of magnet, does not need the customization processing simultaneously, can enough reduce manufacturing cost, can also shorten processing technology time, especially need not grind processing to magnet, avoid the waste of magnet material, practice thrift rare earth magnetite resource. Further, because the rotor with two less magnetic conductive pieces as the rotor of rotor, the magnetite that will have great weight sets up on the fixed block, also the magnetite setting of motor is in the position of output shaft, the axis of rotation is concentrated to most weight of rotor, make the inertia of rotor reduce about 70%, then the load of rotor reduces, the vibration that arouses when frequent rotation reduces and at the little output power of same condition greatly improved motor efficiency, the vibration is little, the motor is more steady, service life has been increased, especially, be applicable to the reciprocating motion environment of high frequency in the electric toothbrush.

5. The elastic pieces are arranged at the relative positions of the bearings, so that the motor can reversely twist power at the other end of the output shaft through the elastic pieces, the stability of the rotor in reciprocating rotation is improved, and the rotor has higher response speed in reciprocating rotation. Meanwhile, the elastic sheet replaces the shaft tail end of the bearing to stabilize, and the cost of the motor can be further reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of an acoustic wave motor according to a first embodiment of the present invention.

Fig. 2 is an exploded schematic view of an acoustic wave motor according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a stator in an acoustic wave motor according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a rotor in an acoustic wave motor according to a first embodiment of the present invention.

Description of reference numerals:

1. a rotor; 11. an iron core; 111. a winding slot; 12. an insulating block; 13. enamelled wires;

2. a stator; 21. a first rotating piece; 22. a second rotating piece; 23. a fixed block; 24. a magnetic block; 25. mounting blocks; 26. a spring plate;

3. a housing; 31. a rubber cover; 32. a containing groove; 33. a bearing;

100. and an output shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Please refer to fig. 1, fig. 2, fig. 3 and fig. 4, a first embodiment of the present invention discloses an acoustic wave motor, which includes a stator 1, a rotor 2 and a housing 3, wherein the stator 1 and the rotor 2 are disposed in the housing 3, the stator 1 is positioned on the housing 3, the rotor 2 is disposed on the outer peripheral side of the stator 1, the rotor 2 is rotatably connected to the housing 3, one end of the rotor 2 is connected to an output shaft 100, and the output shaft 100 passes through the housing 3 and extends outward.

It can be understood that the rotor 2 is arranged on the outer peripheral side of the stator 1, and the rotor 2 rotates on the outer peripheral side of the stator 1, so that the coil only needs to be wound on the stator, and a complex internal winding structure does not need to be arranged.

Stator 1 includes iron core 11, insulating block 12 and enameled wire 13, iron core 11 is close to rotor 2's both sides face is equipped with wire winding groove 111, wire winding groove 111 is the inward sunk structure in iron core 11 surface, wind on the wire winding groove 111 and establish enameled wire 13. The insulating blocks 12 are inserted into two ends of the iron core 11, two ends of the insulating blocks 12 abut against the inner surface of the shell 3, the insulating blocks 12 are made of silica gel or other insulating soft materials, the insulating blocks 12 and the shell 3 are in interference fit, and when the whole stator 1 is placed inside the shell 3, two opposite sides of the insulating blocks 12 abut against the upper surface and the lower surface of the inner side of the shell 3 respectively.

It can be understood that the insulation blocks 12 are also provided with corresponding groove structures at positions corresponding to the winding slots 111, that is, when assembling the stator 1, two insulation blocks 12 are first inserted into two ends of the iron core 11, and then the enameled wire 13 is wound in the winding slots 111. The iron core 11 may be a structure formed by stacking a plurality of silicon steel sheets.

It can be understood that the rotor 2 is arranged on the outer peripheral side of the stator 1 to rotate, so that the winding of the enameled wire 13 of the stator 1 can be carried out in an open area, in the embodiment, the enameled wire 13 can be wound along the winding slot 111 on the outer surface of the iron core 11, the area wound by the coil is changed into the outer surface area of the iron core 11, the winding work of the enameled wire 13 is facilitated, and the production efficiency is improved.

It can be understood that the motor outer diameter of the electric toothbrush is generally small, which results in a very small air gap radius of the motor, while the torque of the motor is proportional to the square of the rotor radius, and the use of the outer rotor structure of this embodiment without changing the motor outer diameter can increase the air gap radius of the motor by 30%, which increases the torque of the motor by 90%.

Referring to fig. 2 and 4, the rotor 2 includes a first rotating plate 21, a second rotating plate 22 and a fixing block 23, the first rotating plate 21 and the second rotating plate 22 are disposed opposite to each other, one end of the first rotating plate 21 and one end of the second rotating plate 22 are connected to the fixing block 23, and the fixing block 23 is connected to the output shaft 100. The same end of the first rotating piece 21 and the second rotating piece 22 is positioned on the fixed block 23, the first rotating piece 21 and the second rotating piece 22 are respectively arranged on two opposite side surfaces of the stator 1, specifically, the first rotating piece 21 and the second rotating piece 22 are respectively arranged on two sides of an area of the winding slot 111 on the iron core 11 and rotate in an area close to the winding slot 111, and the rotating action generated by the first rotating piece 21 and the second rotating piece 22 is output to the output shaft 100 to be output outwards through the connecting action of the fixed block 23.

It is understood that the first rotating plate 21 and the second rotating plate 22 are L-shaped structures with magnetism in use, and two rotating plates may be magnetic sheets, that is, magnets are selected as the first rotating plate 21 and the second rotating plate 22. Or a magnetic conductive sheet may be optionally arranged, specifically, in this embodiment, a magnetic block 24 is positioned in the fixed block 23, the first rotating sheet 21 and the second rotating sheet 22 are respectively in contact with two side surfaces of the magnetic block 24, the first rotating sheet 21 and the second rotating sheet 22 are magnetic conductive sheets, and the first rotating sheet 21 and the second rotating sheet 22 are made to have magnetism by a magnetic conductive manner.

It can be understood that the first rotating plate 21 and the second rotating plate 22 are configured as magnetic conductive plates, and the structure that the first rotating plate 21 and the second rotating plate 22 directly use magnets can be avoided by the conduction function of one magnet 24 in the fixed block 23. The magnetic conductive sheet is made of pure iron, the magnetic conductive capability is strongest, compared with a magnet material, the magnetic conductive sheet is 0.5mm thick and can meet the requirement of the original matched magnet, the thickness of the magnet is larger than or equal to 1.5mm, the density of the magnet is close to that of the pure iron, the mass of the magnetic conductive sheet used in the embodiment is reduced by two thirds, the outer diameter of the rotor is increased by 2mm, namely the outer diameter of the rotor is increased by 20%.

It can be understood that in the present embodiment, the first rotating piece 21 and the second rotating piece 22 are respectively contacted with different sides (magnetic poles) of the magnetic block 24 to make the magnetic properties of the first rotating piece 21 and the second rotating piece 22 opposite, so as to form a rotatable rotor structure.

It can be understood that the scheme of magnetite processing is just ground into the arc after cutting into squarely earlier, and this embodiment sets up first rotor plate 21 and second rotor plate 22 into the structure of magnetic conduction piece, compares in directly using the magnet structure, can reduce the weight of first rotor plate 21 and second rotor plate 22, still makes the magnetite material need not customize into the special construction of first rotor plate 21 and second rotor plate 22.

With reference to fig. 2 and 4, an end of the rotor 2 away from the fixed block 23 is provided with an installation block 25, the first rotating plate 21 and the second rotating plate 22 are positioned at two ends of the installation block 25, specifically, two ends of the installation block 25 are provided with recesses, and the first rotating plate 21 and the second rotating plate 22 are buckled in the recesses at two ends of the installation block 25, so that the stability of the first rotating plate 21 and the second rotating plate 22 during the common rotation is higher through the fixing action of the two ends of the installation block 25 and the fixed block 23.

An elastic sheet 26 is positioned on the mounting block 25, and the elastic sheet 26 extends in the direction away from the fixing block 23. Correspondingly, a rubber cover 31 is arranged at a position of the shell 3 corresponding to the elastic sheet 26, an insertion groove is formed in the rubber cover 31, and the elastic sheet 26 is inserted in the insertion groove. When the rotor 2 rotates, the elastic sheet 26 is twisted to generate a rotating force, and the arrangement of the elastic sheet 26 can improve the restoring force of the rotation of the rotor 2 and can also improve the rotation stability.

The housing 3 is provided with a receiving groove 32 at one end of the output shaft 100, a bearing 33 is positioned in the receiving groove 32, the output shaft 100 passes through the bearing 33, the output shaft 100 is connected with the fixed block 23, and the bearing 33 is arranged to increase the stability of the rotation of the rotor 2.

The utility model discloses the second embodiment provides an electric toothbrush, and its sound wave motor that adopts above-mentioned first embodiment to provide realizes automatic brushing action on pegging graft output shaft 100 through electric toothbrush's toothbrush head.

1. the periphery side that locates the stator through setting up the rotor is rotatory for the coil of coiling need not set up in inside on the stator, only need around establish in the sunken winding inslot of stator periphery side can, changed on the current stator core wire-wound direction and position, avoided having now at the inside wire-wound structure of stator core, reduce the wire winding degree of difficulty, improve the wire winding efficiency of coil, further improve the production efficiency of motor, be particularly useful for the automated production of motor.

2. Through setting up the both ends that the insulating block pegged graft the iron core for when the insulating block is insulating between with enameled wire and the iron core, through supporting of insulating block hold the effect location in the casing, realize insulating and locate function simultaneously.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The sound wave motor is characterized by comprising a stator, a rotor and a shell, wherein the stator and the rotor are arranged in the shell, the stator is positioned in the shell, the rotor is arranged on the periphery side of the stator, and the rotor is rotationally connected with the shell.

2. The acoustic wave motor of claim 1, wherein: the stator comprises an iron core, two side faces, close to the rotor, of the iron core are provided with winding grooves, and the winding grooves are of inward concave structures on the surface of the iron core;

and the winding groove is wound with an enameled wire.

3. The acoustic wave motor of claim 2, wherein: the stator further comprises insulating blocks, the insulating blocks are inserted into the two ends of the iron core, and the two ends of the insulating blocks abut against the inner surface of the shell.

4. The acoustic wave motor of claim 1, wherein: the rotor comprises a first rotating piece, a second rotating piece and a fixing block, the first rotating piece and the second rotating piece are arranged oppositely, one end of the first rotating piece and one end of the second rotating piece are connected with the fixing block, and the fixing block is connected with an output shaft.

5. The acoustic wave motor of claim 4, wherein: a magnetic block is positioned in the fixed block, and the first rotating sheet and the second rotating sheet are respectively contacted with two side surfaces of the magnetic block;

the first rotating sheet and the second rotating sheet are magnetic conductive sheets.

6. The acoustic wave motor of claim 4, wherein: one end of the rotor, which is far away from the fixed block, is provided with a mounting block, and the first rotating sheet and the second rotating sheet are positioned at two ends of the mounting block;

an elastic sheet is positioned on the mounting block and extends in the direction far away from the fixing block;

the shell is provided with a rubber cover corresponding to the position of the elastic sheet, the rubber cover is provided with an insertion groove, and the elastic sheet is inserted in the insertion groove.

7. The acoustic wave motor of claim 1, wherein: the shell is provided with a containing groove at one end of the output shaft, a bearing is positioned in the containing groove, and the output shaft penetrates through the bearing.

8. An electric toothbrush characterized by: use of a sonic motor according to any of claims 1-7 above.