CN117639427A - Electric toothbrush and vibrating motor thereof - Google Patents
Electric toothbrush and vibrating motor thereof Download PDFInfo
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- CN117639427A CN117639427A CN202211114194.9A CN202211114194A CN117639427A CN 117639427 A CN117639427 A CN 117639427A CN 202211114194 A CN202211114194 A CN 202211114194A CN 117639427 A CN117639427 A CN 117639427A
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- 238000004804 winding Methods 0.000 claims abstract description 163
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000009434 installation Methods 0.000 claims description 25
- 230000006698 induction Effects 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000005389 magnetism Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 210000000214 mouth Anatomy 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
- H02K1/2733—Annular magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The embodiment of the application provides an electric toothbrush and vibrating motor, and vibrating motor includes output shaft, rotor subassembly and first stator module. The rotor assembly is sleeved on the output shaft and is provided with a plurality of rotor magnet parts distributed along the circumferential direction of the output shaft, and each rotor magnet part is provided with a rotor magnetic pole; the first stator assembly comprises a first stator iron core and a first stator winding, the first stator iron core is sleeved on the periphery of the rotor winding, the first stator iron core comprises a plurality of stator teeth distributed around the circumference of the rotor assembly, stator grooves are formed between two adjacent stator teeth, and the first stator winding is wound on the plurality of stator teeth and is positioned in the stator grooves; when the first stator winding is electrified, one end of the stator teeth, facing the rotor assembly, generates a plurality of first stator magnetic poles, the plurality of first stator magnetic poles interact with the plurality of rotor magnetic poles, and the rotor assembly and the output shaft are driven to rotate in a reciprocating manner around the axial direction of the output shaft, so that the stability of the vibration motor under long-time working is improved.
Description
Technical Field
The application relates to the technical field of oral cavity cleaning, in particular to an electric toothbrush and a vibrating motor thereof.
Background
The electric toothbrush drives the brush head to vibrate through the vibration motor, so that the oral cavity of a user is cleaned. In the related art, a rotor of a vibration motor is generally provided with a rotor winding, and the magnetic action relationship between the rotor and a stator is changed by changing the current direction in a linear rotor set, so that the rotor reciprocates to drive a brush head to vibrate reciprocally, however, an outgoing line of the rotor winding also follows the rotor to reciprocate, and the outgoing line generates mechanical torsion bending stress, so that in the long-time use process, the ageing of the outgoing line can be accelerated, and even the outgoing line breaks to cause the vibration motor to be unable to continue working.
Disclosure of Invention
The application provides an electric toothbrush and vibrating motor, can improve the stability under the vibrating motor long-time work.
A first aspect of the present embodiment provides a vibration motor, including:
an output shaft;
the rotor assembly is sleeved on the output shaft and provided with a plurality of rotor magnet parts distributed along the circumferential direction of the output shaft, each rotor magnet part is provided with a rotor magnetic pole, and the polarities of the rotor magnetic poles of two adjacent rotor magnet parts are opposite;
the first stator assembly comprises a first stator iron core and a first stator winding, the first stator iron core is sleeved on the periphery of the rotor winding, the first stator iron core comprises a plurality of stator teeth distributed around the periphery of the rotor assembly, stator grooves are formed between two adjacent stator teeth, and the first stator winding is wound on the plurality of stator teeth and is positioned in the stator grooves;
When the first stator winding is electrified, one end of the stator teeth, which faces the rotor assembly, generates a plurality of first stator magnetic poles, 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 and the output shaft to rotate reciprocally around the axial direction of the output shaft.
Further, the rotor assembly includes:
the first magnetic ring is sleeved on the output shaft and is configured to be magnetized along the outer diameter of the first magnetic ring in a multipolar magnetizing mode, so that a plurality of rotor magnet parts are formed on the outer peripheral wall of the first magnetic ring, the polarities of two adjacent rotor magnet parts are opposite and comprise a south pole and a north pole, and in the first magnetic ring, a magnetic induction line points to the two adjacent north poles from the south pole.
Further, the rotor assembly includes:
the sleeve joint body is sleeved on the output shaft, and the peripheral wall of the sleeve joint body is provided with a plurality of spaced mounting grooves;
the permanent magnets are formed on the rotor magnet parts and are installed in the installation grooves in a one-to-one correspondence mode, each permanent magnet comprises an inner end and an outer end which are arranged in a back-to-back mode, the inner ends are installed in the installation grooves, the outer ends are located outside the installation grooves, and the polarities of the adjacent two outer ends are opposite.
Further, the method further comprises the following steps: the first bracket is arranged between the stator core and the first stator winding and is an insulating piece so as to insulate the stator core from the first stator winding.
Further, the first bracket and the stator core are integrally injection molded; or alternatively
The first support comprises two independent sleeving parts, and the two sleeving parts are respectively sleeved at two ends of the stator core in the axial direction of the output shaft.
Further, the inner wall surface of the first bracket facing the rotor assembly is provided with one of a limiting part and a limiting groove, the outer wall surface of the rotor assembly facing the first bracket is provided with the other of the limiting part and the limiting groove, and the limiting part is positioned in the limiting groove and can rotate reciprocally around the axial direction of the output shaft within the range limited by the limiting groove so as to limit the reciprocating rotation angle of the output shaft.
Further, the stator teeth include:
a winding portion around which the first stator winding is wound;
an internal tooth portion connected to one end of the winding portion facing the rotor assembly;
an external tooth portion connected to one end of the winding portion facing away from the rotor assembly;
The stator groove is formed by arranging two adjacent winding parts at intervals, wherein the sizes of the inner tooth parts and the outer tooth parts in the circumferential direction of the output shaft are larger than the sizes of the winding parts in the circumferential direction of the output shaft; and/or two adjacent inner tooth parts extend oppositely, and a plurality of inner tooth parts enclose a cylindrical space for accommodating the rotor assembly and the output shaft.
Further, each of the stator teeth further includes:
a connecting portion, wherein two adjacent internal tooth portions are connected through one connecting portion or a plurality of connecting portions at intervals; and/or two adjacent external tooth parts are connected through one connecting part or a plurality of connecting parts at intervals.
Further, each of the stator teeth further includes:
and two magnetism collecting parts which are respectively arranged at two ends of the inner tooth part in the circumferential direction of the output shaft and are protruded from the inner tooth part to the output shaft.
Further, the reciprocating rotation angle of the output shaft is more than or equal to 4 degrees and less than or equal to 5 degrees; and/or, the number of the magnet part is greater than or equal to N35.
Further, the method further comprises the following steps:
the vibrator assembly is sleeved on the output shaft and is arranged at intervals with the rotor assembly, the vibrator assembly is provided with a plurality of vibrator magnet parts distributed along the axial direction of the output shaft, each vibrator magnet part is provided with a vibrator magnetic pole, the vibrator magnetic poles are arranged in pairs along the axial direction of the output shaft, and the polarities of the two magnetic poles of the same pair of vibrator magnetic poles are opposite;
The second stator assembly is arranged on the periphery of the vibrator assembly in a surrounding mode and comprises a second stator iron core and a second stator winding, the second stator iron core comprises a plurality of iron core rings which are arranged at intervals along the axial direction of the output shaft, a winding space is formed between every two adjacent iron core rings, and the second stator winding is located in the winding space and is arranged at intervals with the iron core rings;
when the second stator winding is electrified, the iron core rings generate paired second stator magnetic poles at two ends of the output shaft in the axial direction, and the polarities of the two second stator magnetic poles of the same pair are opposite to each other so as to drive the vibrator assembly and the output shaft to reciprocate along the axial direction of the output shaft.
Further, the method further comprises the following steps:
the second support is arranged on the periphery of the vibrator assembly in a surrounding mode and is provided with a plurality of iron core installation annular grooves and a plurality of winding installation annular grooves, the second support is an insulating piece, the iron core installation annular grooves and the winding installation annular grooves are sequentially and alternately arranged along the axial direction of the output shaft, the iron core rings are arranged in the iron core installation annular grooves, the second stator winding is arranged in the winding installation annular grooves, and the winding space comprises the winding installation annular grooves.
Further, one of the groove wall of the iron core mounting groove and the iron core ring is provided with a positioning part, the other one of the groove wall of the iron core mounting groove and the iron core ring is provided with a positioning groove, and the positioning part is positioned in the positioning groove so as to position the iron core ring; and/or
The second bracket and the iron core ring are also provided with wiring grooves, and the wiring grooves are communicated with two adjacent winding installation ring grooves so that the second stator winding can be wired in the two adjacent winding installation ring grooves through the wiring grooves.
Further, the device also comprises at least one group of elastic components, wherein the at least one group of elastic components are positioned on any side of the whole body formed by the rotor component and the vibrator component in the axial direction of the output shaft; each of the elastic components comprises:
the inner ring of the bearing is sleeved on the output shaft;
the end cover is arranged around the periphery of the bearing;
the elastic piece is connected with the outer ring of the bearing and the end cover;
the bearing is elastically deformed when the bearing moves along the axial direction of the output shaft in a reciprocating mode along the axial direction of the output shaft.
Further, the number of the elastic components is two, and the two elastic components are positioned at two opposite sides of the whole body formed by the rotor component and the vibrator component in the axial direction of the output shaft; and/or the number of the groups of groups,
The elastic piece is an elastic piece, one end of the elastic piece is fixedly connected with the end cover, the elastic piece extends from the end cover to the bearing in a spiral shape, the other end of the elastic piece is provided with a plug hole, and the outer ring of the bearing is plugged in the plug hole.
A second aspect of the embodiments of the present application provides a vibration motor, including:
an output shaft;
the first magnetic ring is sleeved on the output shaft and is configured to be magnetized along the outer diameter of the first magnetic ring in a multipolar magnetizing mode so as to form a plurality of rotor magnet parts on the outer peripheral wall of the first magnetic ring, the polarities of two adjacent rotor magnet parts are opposite and comprise a south pole and a north pole, and in the first magnetic ring, a magnetic induction line points to the two adjacent north poles from the south pole;
the first stator assembly comprises a stator core and a first stator winding, the stator core is sleeved on the periphery of the rotor winding, the stator core comprises a plurality of stator teeth distributed around the circumference of the first magnetic ring, stator grooves are formed between two adjacent stator teeth, and the first stator winding is wound on the plurality of stator teeth and is positioned in the stator grooves;
when the first stator winding is electrified, one end of the stator teeth, which faces the first magnetic ring, generates a plurality of first stator magnetic poles, and the polarities of two adjacent first stator magnetic poles are opposite to each other so as to drive the first magnetic ring and the output shaft to rotate back and forth around the circumferential direction of the output shaft.
Further, the method further comprises the following steps:
the vibrator assembly is sleeved on the output shaft and is arranged at intervals with the rotor assembly, the vibrator assembly is provided with a plurality of vibrator magnet parts distributed along the axial direction of the output shaft, each vibrator magnet part is provided with a vibrator magnetic pole, the vibrator magnetic poles are arranged in pairs along the axial direction of the output shaft, and the polarities of two magnetic poles in the same pair of vibrator magnetic poles are opposite;
the second stator assembly is arranged on the periphery of the vibrator assembly in a surrounding mode and comprises a second stator iron core and a second stator winding, the second stator iron core comprises a plurality of iron core rings which are arranged at intervals along the axial direction of the output shaft, a winding space is formed between every two adjacent iron core rings, and the second stator winding is located in the winding space and is arranged at intervals with the iron core rings;
when the first stator winding is electrified, one end of the stator teeth, which faces the rotor assembly, generates a plurality of first stator magnetic poles, 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 so as to drive the rotor assembly and the output shaft to rotate in a reciprocating manner around the axial direction of the output shaft.
A third aspect of embodiments of the present application provides an electric toothbrush comprising:
a vibration motor as claimed in any one of the above;
the rotor component and the first stator component are 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 is detachably connected with one end of the output shaft, which is positioned outside the brush handle.
The embodiment of the application provides an electric toothbrush and vibrating motor thereof, vibrating motor's first stator module encloses and locates rotor module week side, that is, this vibrating motor belongs to inner rotor motor, and through setting up the rotor magnet portion that has permanent magnetism rather than electromagnetism on rotor module, set up first stator winding simultaneously on first stator module, drive rotor module through the current flow direction that changes first stator winding and realize circumferential vibration, compare in the correlation technique, set up coil winding and lead-out wire on rotor module, the embodiment of the application is owing to need not to set up winding coil at rotor module, just need not set up winding coil's lead-out wire yet, consequently, thoroughly solved winding coil's lead-out wire because of following rotor rotation produces mechanical torsion bending stress, and the problem of ageing is accelerated, also solved the lead-out wire fracture and lead to vibrating motor unable problem of continuing to work, consequently, vibrating motor of the embodiment of the application can improve vibrating motor and work stability under a long-time.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a vibration motor according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an exploded structure of a vibration motor according to an embodiment of the present application;
FIG. 3 is a schematic structural view of a rotor assembly in one embodiment of the present application;
FIG. 4 is a schematic structural view of a first stator assembly according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an exploded view of a first stator assembly according to one embodiment of the present application;
fig. 6 is a schematic structural view of a first stator core according to an embodiment of the present application;
fig. 7 is an exploded view of a vibration motor according to still another embodiment of the present application;
FIG. 8 is a schematic cross-sectional view of a vibration motor in a radial plane in one embodiment of the present application;
fig. 9 is a schematic structural view of a first stator core according to another embodiment of the present application;
Fig. 10 is a schematic structural view of a vibration motor according to another embodiment of the present application;
fig. 11 is an exploded structural view of a vibration motor in still another embodiment of the present application;
FIG. 12 is an exploded view of a second stator winding in one embodiment of the present application;
fig. 13 is a schematic structural view of an output shaft and an elastic assembly according to an embodiment of the present application.
Description of the drawings: 10. a vibration motor; 11. an output shaft; 11a, a cylindrical space; 12. a rotor assembly; 121. a rotor magnet portion; 122. a first magnetic ring; 122a, mounting slots; 122b, a limiting part; 123. a socket body; 124. a permanent magnet; 13. a first stator assembly; 131. a first stator core; 131a, stator slots; 1311. stator teeth; 1312. a winding part; 1313. an internal tooth portion; 1314. external tooth part; 1315. a connection part; 1316. a magnetism collecting part; 132. a first stator winding; 133. a first bracket; 133a, limit grooves; 14. a vibrator assembly; 141. a vibrator magnet section; 142. a second magnetic ring; 15. a second stator assembly; 151. a second stator core; 151a, winding space; 151b, positioning slots; 1511. an iron core ring; 152. a second stator winding; 153. a second fixed bracket; 153a, iron core mounting ring groove; 153b, winding mounting ring grooves; 153c, wiring grooves; 153d, wiring grooves; 16. an elastic component; 161. a bearing; 162. an elastic member; 162a, plug holes; 163. an end cap.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Referring to fig. 1-2, a first aspect of the present embodiment provides a vibration motor 100, where the vibration motor 100 generates vibration through a reciprocating motion, and further drives a load to vibrate. The vibration motor 100 can be applied to products such as electric toothbrushes and massagers, etc. in which the vibration motor 100 is required to drive part of the structure of the products to vibrate, for example, when the vibration motor 100 is applied to the electric toothbrushes, the vibration motor 100 can drive the brush heads of the electric toothbrushes to vibrate, so as to clean the oral cavities of users.
Referring to fig. 1-3, in some embodiments, a vibration motor 100 includes: an output shaft 11, a rotor assembly 12 and a first stator assembly 13. The output shaft 11 is used to connect with a load such as a brush head and drive the load to perform circumferential vibration, which can be understood as vibration formed by the output shaft 11 and the load moving back and forth along the circumferential direction of the output shaft 11 itself.
The rotor assembly 12 is sleeved on the output shaft 11 and is fixedly connected with the output shaft 11, and is used for driving the output shaft 11 to synchronously move with the rotor assembly 12, the rotor assembly 12 is provided with a plurality of rotor magnet portions 121 distributed along the circumferential direction of the output shaft 11, each rotor magnet portion 121 is provided with a rotor magnetic pole, due to the fact that the plurality of rotor magnet portions 121 exist, a plurality of rotor magnetic poles exist, and the plurality of rotor magnetic poles are distributed along the axial direction of the output shaft 11, torque when the rotor assembly 12 is driven by the first stator assembly 13 is improved, polarities of the rotor magnetic poles of two adjacent rotor magnet portions 121 are opposite, multiple-point and multi-position magnetic interaction between the rotor assembly 12 and the first stator assembly 13 can be formed, and response speed of starting vibration when the rotor assembly 12 is driven by the first stator assembly 13 is improved, namely, after the first stator assembly 13 starts working, the rotor assembly 12 can quickly start to vibrate circumferentially.
Referring to fig. 4-5, the first stator assembly 13 is configured to drive the rotor assembly 12 to vibrate, the first stator assembly 13 includes a first stator core 131 and a first stator winding 132, the first stator core 131 is sleeved on the peripheral side of the rotor winding 12, that is, the rotor assembly 12 is inserted into the first stator core 131, so that the vibration motor 10 has a compact structure. Referring to fig. 6, the first stator core 131 includes a plurality of stator teeth 1311 circumferentially distributed around the rotor assembly 12, a stator slot 131a is configured between two adjacent stator teeth 1311, and the first stator winding 132 is wound on the plurality of stator teeth 1311 and is located in the stator slot 131a, that is, the first stator winding 132 is wound on the plurality of stator teeth 1311, and the first stator winding 132 is received in the stator slot 131a, so that the volume of the vibration motor 100 is reduced, and the magnetic energy density of the first stator assembly 13 is improved. The first stator winding 132 may be a three-phase winding, or may be another type of winding, which is not limited in this embodiment.
The operating principle of the vibration motor 100 of the above embodiment is as follows: when the first stator winding 132 is energized, one end of the stator teeth 1311 facing the rotor assembly 12 generates a plurality of first stator magnetic poles, and the polarities of two adjacent first stator magnetic poles are opposite, the plurality of first stator magnetic poles interact with the plurality of rotor magnetic poles, so as to drive the rotor assembly 12 and the output shaft 11 to reciprocate around the axial direction of the output shaft 11, and circumferential vibration is realized; it will be appreciated that in order to achieve circumferential vibration of the rotor assembly 12, the first stator winding 132 needs to be energized with an alternating current, so that the polarity of the first stator pole is changed at different moments, thereby changing the magnetic interaction relationship between the first stator pole and the rotor pole, for example, for a particular first stator pole, when an attraction is applied to an adjacent rotor pole, the result is that the rotor magnet 121 with the rotor pole is driven to rotate clockwise by the magnetic attraction, and at the next moment, due to the change of the current direction in the first stator winding 132, the same first stator pole is now repulsive to the same rotor pole, and the result is that the rotor magnet 121 with the rotor pole is driven to rotate counterclockwise by the magnetic repulsion; and because of the existence of a plurality of rotor magnetic poles and a plurality of first stator magnetic poles, the plurality of rotor magnetic poles and the plurality of first stator magnetic poles interact, the plurality of first stator magnetic poles can give stronger magnetic attraction force or magnetic repulsion force to the plurality of rotor magnetic poles, so that the output shaft 11 and the rotor assembly 12 are driven to rotate in a reciprocating manner forcefully, and the output shaft 11 can drive a load to vibrate.
As can be seen from the above embodiments, the first stator assembly 13 of the vibration motor 100 of the present application is disposed around the rotor assembly 12, that is, the vibration motor 100 belongs to an inner rotor motor, and by disposing the rotor magnet portion 121 with permanent magnetism instead of electromagnetism on the rotor assembly 12, and disposing the first stator winding 132 on the first stator assembly 13, and driving the rotor assembly 12 to realize circumferential vibration by changing the current flow direction of the first stator winding 132, compared with the related art, disposing the coil winding and the lead-out wire on the rotor assembly 12, the present embodiment of the present application does not need to dispose the coil winding on the rotor assembly 12, that is, does not need to dispose the lead-out wire of the coil winding, thus thoroughly solving the problem that the lead-out wire of the coil winding generates mechanical torsional bending stress due to rotation following the rotor, and accelerating aging, and also solving the problem that the lead-out wire breaks and the vibration motor 100 cannot continue to work.
Referring to fig. 7, in some embodiments, the rotor assembly 12 includes a first magnetic ring 122, the first magnetic ring 122 is sleeved on the output shaft 11, the first magnetic ring 122 is configured to be magnetized along an outer diameter of the first magnetic ring 122 in a multi-pole magnetizing manner, so as to form a plurality of rotor magnet portions 121 on an outer peripheral wall of the first magnetic ring 122, and each rotor magnet portion 121 has a rotor magnetic pole, that is, by radially magnetizing the first magnetic ring 122, the first magnetic ring 122 has a plurality of rotor magnetic poles distributed along a circumferential direction of the first magnetic ring 122, so that the first magnetic ring 122 has permanent magnetism. And the polarities of the two adjacent rotor magnet portions 121 are opposite and include a south pole and a north pole, and in the first magnetic ring 122, the magnetic induction lines point to the two adjacent north poles from the south pole, so that the number of the rotor magnetic poles on the first magnetic ring 122 can be increased according to actual conditions, and the magnetic energy density of the rotor assembly 12 can be further improved.
Referring to fig. 2-3, in other embodiments, the rotor assembly 12 includes a sleeve body 123 and permanent magnets 124, the sleeve body 123 is sleeved on the output shaft 11 to achieve a fixed connection with the output shaft 11, the outer peripheral wall of the sleeve body 123 has a plurality of spaced mounting slots 122a, the permanent magnets 124 have permanent magnetism for forming the rotor magnet portion 121, and the permanent magnets 124 are mounted in the plurality of mounting slots 122a in a one-to-one correspondence manner, each permanent magnet 124 includes an inner end and an outer end disposed opposite to each other, the inner end is mounted in the mounting slot 122a, thereby achieving a stable connection between the permanent magnets 124 and the sleeve body 123, the outer end is located outside the mounting slot 122a so as to be closer to the first stator core 131, and the outer end is used for rotor poles, thereby achieving a close-distance induction between the rotor poles and the first stator poles of the first stator core 131, and improving 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 first stator assembly 13 is improved.
Referring to fig. 4-5, further, the first stator assembly 13 further includes a first bracket 133, the first bracket 133 is disposed between the first stator core 131 and the first stator winding 132, and the first bracket 133 is an insulating member to insulate the first stator core 131 from the first stator winding 132, so as to avoid direct short circuit between the first stator winding 132 and the first stator core 131, and ensure that the first stator winding 132 can normally transmit magnetic energy generated by alternating current to the first stator core 131.
Specifically, the first bracket 133 may be integrally injection-molded with the first stator core 131, thereby simplifying a production process and reducing a production cost. Or, the first bracket 133 may also include two independent sleeving parts (not numbered in the drawing), where the two sleeving parts are respectively sleeved at two ends of the first stator core 131 in the axial direction of the output shaft 11, and the first stator winding 132 is wound reciprocally on the two sleeving parts, so that the first stator winding 132 and the first stator core 131 are in a spaced state and not in direct contact, thereby ensuring insulation between the first bracket 133 and the first stator core 131, and thus, the material consumption of the first bracket 133 can be reduced, and the material consumption cost can be reduced.
Referring to fig. 8, in some embodiments, an inner wall surface of the first bracket 133 facing the rotor assembly 12 has one of a limiting portion 122b and a limiting groove 133a, an outer wall surface of the rotor assembly 12 facing the first bracket 133 has the other of the limiting portion 122b and the limiting groove 133a, for example, the other of the limiting portion 122b and the limiting groove 133a is disposed on the first magnetic ring 122 or the socket 123 or the permanent magnet 124, and the limiting portion 122b is located in the limiting groove 133a and can reciprocally rotate around the axial direction of the output shaft 11 within a range defined by the limiting groove 133a to limit the reciprocal rotation angle of the output shaft 11, so as to avoid the excessive rotation angle of the output shaft 11 from causing the reduction of the vibration frequency. Specifically, the limiting portion 122b may be a limiting block or a limiting protrusion, which is not limited in this embodiment.
Referring to fig. 9, in some embodiments, the stator teeth 1311 include a winding portion 1312, an inner tooth portion 1313 and an outer tooth portion 1314, the first stator winding 132 is wound around the winding portion 1312, the inner tooth portion 1313 is connected to an end of the winding portion 1312 facing the rotor assembly 12, the outer tooth portion 1314 is connected to an end of the winding portion 1312 facing away from the rotor assembly 12, and two adjacent winding portions 1312 are spaced apart, and the sizes of the inner tooth portion 1313 and the outer tooth portion 1314 in the circumferential direction of the output shaft 11 are larger than the sizes of the winding portion 1312 in the circumferential direction of the output shaft 11, so as to form a stator slot 131a, and since the sizes of the inner tooth portion 1313 and the outer tooth portion 1314 in the circumferential direction of the output shaft 11 are larger than the sizes of the winding portion 1312 in the circumferential direction of the output shaft 11, the inner tooth portion 1313 and the outer tooth portion 1314 can prevent the first stator winding 132 from being separated from the first stator core 131 in the radial direction of the first stator core 131.
With continued reference to fig. 9, in some embodiments, two adjacent internal tooth portions 1313 extend toward each other, and a cylindrical space 11a for accommodating the rotor assembly 12 and the output shaft 11 is defined by the plurality of internal tooth portions 1313, so that not only is the magnetic induction between the internal tooth portions 1313 and the rotor poles of the rotor assembly 12 facilitated, but also the rotor assembly 12 can be guaranteed to rotate inside the first stator core 131 without obstruction.
With further reference to fig. 9, each stator tooth 1311 further includes a connection portion 1315, where two adjacent inner tooth portions 1313 are connected and fixed by one or more connection portions 1315, so that the plurality of inner tooth portions 1313 are connected together by the connection portion 1315, and each inner tooth portion 1313 is connected and fixed by one winding portion 1312 to one outer tooth portion 1314, the plurality of inner tooth portions 1313, the plurality of winding portions 1312 and the plurality of outer tooth portions 1314 are connected and fixed together, so that there is no excessive displacement between them, and the first stator winding 132 is convenient to wind on the first stator core 131, and when two adjacent inner tooth portions 1313 are connected by a plurality of spaced connection portions 1315, the connection stability between the adjacent inner tooth portions 1313 can be improved, and because the connection portions 1315 are not completely filled between the two adjacent inner tooth portions 1313, the material cost can be reduced, and the first stator winding 132 is convenient to dissipate heat by the space between the plurality of connection portions 1315.
Similarly, two adjacent external teeth 1314 may be connected by one or more connection portions 1315, so that the plurality of external teeth 1314 may be connected together by the connection portion 1315, and each external tooth 1314 may be connected and fixed together by one winding portion 1312, the plurality of external teeth 1314, the plurality of winding portions 1312, and the plurality of external teeth 1314 may not have excessive displacement therebetween, so that the first stator winding 132 may be wound on the first stator core 131, and when two adjacent external teeth 1314 are connected by the plurality of spaced connection portions 1315, the connection stability between the adjacent external teeth 1314 may be improved, and since the connection portion 1315 may not be completely filled between the two adjacent external teeth 1314, not only may the material cost be reduced, but also the heat dissipation of the first stator winding 132 may be facilitated by the spacing between the plurality of connection portions 1315.
With further reference to fig. 9, each stator tooth 1311 further includes two magnetic focusing portions 1316, where the magnetic focusing portions 1316 are configured to focus magnetic energy generated by the first stator core 131 induced by the alternating current of the first stator winding 132 at a position where the magnetic focusing portions 1316 are located, and the two magnetic focusing portions 1316 are respectively disposed at two ends of the inner tooth portion 1313 in the circumferential direction of the output shaft 11 and protrude from the inner tooth portion 1313 toward the output shaft 11, so as to shorten a distance between the inner tooth portion 1313 and the rotor assembly 12, thereby enabling the inner tooth portion 1313 to more effectively induce with rotor poles of the rotor assembly 12, improving a utilization rate of magnetic energy generated by the first stator assembly 13, and further reducing energy consumption of the vibration motor 100.
Further, the reciprocating rotation angle of the output shaft 11 is 4 degrees or more and 5 degrees or less, so that the electric energy input to the vibration motor 100 can be converted into vibration of a relatively high frequency, and a better oral cleaning effect can be obtained when the vibration motor 100 is applied to an electric toothbrush.
In some embodiments, the number of the rotor magnet portions 121 is N, N is an even number greater than or equal to 6, the number of the first stator poles generated when the first stator winding 132 is energized is M, M is an even number greater than or equal to 6, so that the rotor assembly 12 has more rotor poles, the first stator winding 132 also has more first stator poles, the magnetic energy density of the vibration motor 100 can be increased, and thus the volume of the vibration motor 100 can be reduced under the same output driving force, the number of the magnets constituting the rotor magnet portions 121 can be reduced, and further the material cost of the rotor assembly 12 can be saved. It is understood that the number of rotor magnet portions 121 may be the same as or different from the number of first stator poles.
Specifically, according to the related art, the larger the number of the magnet is, the higher the cost is, and in order to meet the driving performance of the motor in the related art, the number of the magnet is higher, and the cost is also higher.
Referring to fig. 10-11, further, the vibration motor 100 further includes a vibrator assembly 14 and a second stator assembly 15, the vibrator assembly 14 is sleeved on the output shaft 11 and is fixedly connected with the output shaft 11, the vibrator assembly 14 and the rotor assembly 12 are arranged at intervals to avoid mutual interference between the vibrator assembly 14 and the rotor assembly 12, the vibrator assembly 14 has a plurality of vibrator magnet portions 141 distributed along the axial direction of the output shaft 11, each vibrator magnet portion 141 has a vibrator magnetic pole, the vibrator magnetic poles are arranged in pairs along the axial direction of the output shaft 11, the polarities of the two magnetic poles of the same pair of vibrator magnetic poles are opposite, and the vibrator assembly 14 is used for driving the output shaft 11 to reciprocate along the axial direction of the vibrator assembly under the magnetic force of the second stator assembly 15.
The second stator assembly 15 is arranged around the vibrator assembly 14 and comprises a second stator core 151 and a second stator winding 152, the second stator core 151 comprises a plurality of core rings 1511 which are arranged along the axial direction of the output shaft 11 at intervals, the core rings 1511 are used for gathering magnetic energy generated by alternating current in the second stator winding 152, a winding space 151a is formed between two adjacent core rings 1511, the second stator winding 152 is positioned in the winding space 151a, so that the distance between the second stator winding 152 and the core rings 1511 can be shortened, the magnetic energy transmission efficiency of the second stator winding 152 to the core rings 1511 is improved, the second stator winding 152 and the core rings 1511 are arranged at intervals, direct short-circuiting between the second stator winding 152 and the core rings 1511 can be avoided, and the second stator winding 152 is used for driving the vibrator assembly 14 to reciprocate in the axial direction of the output shaft 11 in a magnetic driving mode.
The second stator winding 152 drives the vibrator assembly 14 according to the following principle: when the second stator winding 152 is energized, the core ring 1511 generates pairs of second stator poles at both ends of the output shaft 11 in the axial direction, and the polarities of the two second stator poles of the same pair are opposite, and the plurality of second stator poles interact with the plurality of vibrator poles to drive the vibrator assembly 14 and the output shaft 11 to reciprocate linearly in the axial direction of the output shaft 11. It will be appreciated that in order to achieve a linear reciprocating movement of the vibrator assembly 14 axially of the output shaft 11, the second stator winding 152 needs to be energized with alternating current to change the polarity of the second stator poles at different times so as to change the magnetic relationship with the vibrator poles, for example, for a particular second stator pole where an attractive effect is exerted on an adjacent vibrator pole, the result is that the vibrator assembly 14 with vibrator pole is driven by magnetic attraction to move in a direction away from the rotor assembly 12, and at the next time, due to the change in direction of current in the second stator winding 152, the same second stator pole now acts as a repulsive effect on the same vibrator pole, the result being that the vibrator assembly 14 with the vibrator pole is driven by magnetic repulsive effect to move in a direction closer to the rotor pole 12. And because of the existence of a plurality of vibrator magnetic poles and a plurality of second stator magnetic poles, the plurality of vibrator magnetic poles and the plurality of second stator magnetic poles interact, the plurality of second stator magnetic poles can give a plurality of vibrator magnetic poles stronger magnetic attraction force or magnetic repulsion force, so that the vibrator assembly 14 and the output shaft 11 are driven to reciprocate linearly along the axial direction of the output shaft 11, and the output shaft 11 can drive a load such as a brush head of an electric toothbrush to vibrate reciprocally along the axial direction of the output shaft 11.
With continued reference to fig. 11, in a specific embodiment, the vibrator assembly 14 includes a second magnetic ring 142, where the second magnetic ring 142 is sleeved on the output shaft 11 and is spaced from the first magnetic ring 122, so as to avoid the interaction between the second magnetic ring 142 and the first magnetic ring 122, the second magnetic ring 142 is configured to be magnetized along the axial direction of the second magnetic ring 142, so as to form vibrator magnet portions 141 disposed in pairs at two axial ends of the second magnetic ring 142, and each vibrator magnet portion 141 has a vibrator magnetic pole, that is, by axially magnetizing the second magnetic ring 142, the second magnetic ring 142 has one or more pairs of vibrator magnetic poles distributed along the second magnetic ring 142, so that the second magnetic ring 142 has permanent magnetism. And the polarities of the two vibrator magnet portions 141 arranged in pairs are opposite and comprise a south pole and a north pole, and in the second magnetic ring 142, magnetic induction lines point to the north pole from the south pole, so that the number of rotor magnetic poles on the second magnetic ring 142 can be increased according to actual conditions, and the magnetic energy density of the vibrator assembly 14 is further improved.
With continued reference to fig. 11-12, in a specific embodiment, the vibration motor 100 further includes a second support 153, where the second support 153 is disposed around the vibrator assembly 14, and the second support 153 has a plurality of core mounting ring grooves 153a and a plurality of winding mounting ring grooves 153b, the plurality of core mounting ring grooves 153a and the plurality of winding mounting ring grooves 153b are alternately disposed along the axial direction of the output shaft 11, the core ring 1511 is mounted on the core mounting ring groove 153a, and the second stator winding 152 is mounted on the winding mounting ring groove 153b, so that the compact mounting of the core ring 1511 and the second stator winding 152 on the second support 153 is facilitated, the volume of the vibration motor 100 is reduced, and the second support 153 is an insulating member, and the second support 153 can avoid direct conduction between the second stator winding 152 and the core ring 1511 to short circuit. The aforementioned winding space 151a includes a winding installation ring groove 153b.
Referring to fig. 11-12, in some embodiments, one of the slot wall of the core mounting slot 153a and the core ring 1511 has a positioning portion 1531, the other of the slot wall of the core mounting slot 153a and the core ring 1511 has a positioning slot 151b, and the positioning portion 1531 is located in the positioning slot 151b to position the core ring 1511, so that positioning and mounting of the core ring 1511 can be achieved during mounting of the core ring 1511 in the core mounting slot 153a, and mounting stability of the core ring 1511 in the core mounting slot 153a can be improved after mounting of the core ring 1511 in the core mounting slot 153 a.
With continued reference to fig. 12, in some embodiments, the second support 153 and the core ring 1511 further have a wire groove 151c, where the wire groove 151c communicates with two adjacent winding mounting ring grooves 153b, so that the second stator winding 152 is routed in the two adjacent winding mounting ring grooves 153b through the wire groove 151c, that is, by opening the wire groove 151c on the second support 153 and the core ring 1511, the two adjacent winding mounting ring grooves 153b communicate with each other, and the wires of the second stator winding 152 in the two adjacent winding mounting ring grooves 153b are routed through the wire groove 151c, so that the wires of the second stator winding 152 are all located in the second support 153 and the core ring 1511, so that the second stator winding 152 is received in the second support 153 and the core ring 1511, protecting the second stator winding 152 and the wires thereof, and avoiding wire confusion.
Referring to fig. 11 and 13, in some embodiments, the device further includes at least one set of elastic components 16, where the at least one set of elastic components 16 is located on either side of the rotor component 12 and the vibrator component 14 in the axial direction of the output shaft 11. As shown in fig. 13, each elastic component 16 includes a bearing 161, an elastic member 162 and an end cover 163, the inner ring of the bearing 161 is sleeved on the output shaft 11, the end cover 163 is surrounded on the periphery of the bearing 161, the elastic member 162 is connected with the outer ring of the bearing 161 and the end cover 163, the end cover 163 can be connected with a housing (not numbered in the figure) of the vibration motor 100, when the second stator winding 152 drives the vibrator component 14 and the output shaft 11 to vibrate axially along the output shaft 11, the bearing 161 follows the output shaft 11 to reciprocate linearly along the axial direction of the output shaft 11, at this time, the elastic member 162 is elastically deformed, by arranging the elastic component 16, connection between the output shaft 11 and the housing of the vibration motor 100 is realized, reciprocating linear motion of the output shaft 11 along the axial direction of the output shaft 11 can be realized, reciprocating vibration of the output shaft 11 along the circumferential direction of the output shaft can be realized, and vibration amplitude of the output shaft 11 in the axial direction of the output shaft can be limited by the elastic member 162.
Referring to fig. 11 and 13, further, the number of the elastic assemblies 16 is two, and the two groups of the elastic assemblies 16 are located at opposite sides of the whole body formed by the rotor assembly 12 and the vibrator assembly 14 in the axial direction of the output shaft 11, so that the segments of the output shaft 11 corresponding to the two end covers 163 are connected with elastic members 162, and the two elastic members 162 limit the output shaft 11 in an elastic manner at two positions, so that the output shaft 11 does not have a deflection motion with an excessive angle on its own axis in the vibration process, and the stability of the output vibration motion of the output shaft 11 is improved.
Referring to fig. 13, specifically, the elastic member 162 is a spring, one end of the spring is fixedly connected with the end cover 163, the other end of the spring has a plug hole 162a, and the outer ring of the bearing 161 is plugged into the plug hole 162a, so as to realize connection between two ends of the spring and the outer ring of the bearing 161 and the end cover 163, respectively. The elastic sheet extends from the end cover 163 to the bearing 161 in a spiral shape, so that the elastic sheet has a longer length, is easier to generate elastic deformation, and can also shorten the length space occupied by the elastic sheet, which is beneficial to miniaturization of the vibration motor 100.
In a second aspect of the present application, an electric toothbrush (not numbered in the drawings) includes a vibration motor 100 according to any of the above embodiments, a brush handle and a brush head, a rotor assembly 12 and a first stator assembly 13 are disposed in the brush handle, one end of an output shaft 11 is disposed in the brush handle, the other end of the output shaft penetrates the brush handle to be located outside the brush handle, and the brush head is detachably connected with one end of the output shaft 11 located outside the brush handle, thereby facilitating replacement of the brush head. Because the vibration motor 100 can at least reciprocally rotate along the circumferential direction of the output shaft 11, the brush head can be driven to move up and down along the teeth to clean at least one direction dimension, and when the vibration motor 100 further comprises the vibrator assembly 14 and the second stator assembly 15, the output shaft 11 can also drive the brush head to do reciprocal linear motion along the axial direction of the output shaft 11, so that the brush head can be driven to vibrate along two direction dimensions, and further the teeth can be cleaned better.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to the specific circumstances.
The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (18)
1. A vibration motor, characterized by comprising:
an output shaft;
the rotor assembly is sleeved on the output shaft and provided with a plurality of rotor magnet parts distributed along the circumferential direction of the output shaft, each rotor magnet part is provided with a rotor magnetic pole, and the polarities of the rotor magnetic poles of two adjacent rotor magnet parts are opposite;
the first stator assembly comprises a first stator iron core and a first stator winding, the first stator iron core is sleeved on the periphery of the rotor winding, the first stator iron core comprises a plurality of stator teeth distributed around the periphery of the rotor assembly, stator grooves are formed between two adjacent stator teeth, and the first stator winding is wound on the plurality of stator teeth and is positioned in the stator grooves;
when the first stator winding is electrified, one end of the stator teeth, which faces the rotor assembly, generates a plurality of first stator magnetic poles, 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 and the output shaft to rotate reciprocally around the axial direction of the output shaft.
2. The vibration motor of claim 1, wherein the rotor assembly comprises:
the first magnetic ring is sleeved on the output shaft and is configured to be magnetized along the outer diameter of the first magnetic ring in a multipolar magnetizing mode, so that a plurality of rotor magnet parts are formed on the outer peripheral wall of the first magnetic ring, the polarities of two adjacent rotor magnet parts are opposite and comprise a south pole and a north pole, and in the first magnetic ring, a magnetic induction line points to the two adjacent north poles from the south pole.
3. The vibration motor of claim 1, wherein the rotor assembly comprises:
the sleeve joint body is sleeved on the output shaft, and the peripheral wall of the sleeve joint body is provided with a plurality of spaced mounting grooves;
the permanent magnets are formed on the rotor magnet parts and are installed in the installation grooves in a one-to-one correspondence mode, each permanent magnet comprises an inner end and an outer end which are arranged in a back-to-back mode, the inner ends are installed in the installation grooves, the outer ends are located outside the installation grooves, and the polarities of the adjacent two outer ends are opposite.
4. The vibration motor of claim 1, further comprising:
the first bracket is arranged between the first stator iron core and the first stator winding and is an insulating piece so as to insulate the first stator iron core from the first stator winding.
5. The vibration motor according to claim 4, wherein,
the first bracket and the first stator core are integrally injection molded; or alternatively
The first bracket comprises two independent sleeving parts, and the two sleeving parts are respectively sleeved at two ends of the first stator core in the axial direction of the output shaft.
6. The vibration motor of claim 4, wherein an inner wall surface of the first bracket facing the rotor assembly has one of a stopper portion and a stopper groove, and an outer wall surface of the rotor assembly facing the first bracket has the other of the stopper portion and the stopper groove, the stopper portion being located in the stopper groove and reciprocally rotatable about an axial direction of the output shaft within a range defined by the stopper groove to restrict a reciprocal rotation angle of the output shaft.
7. The vibration motor of claim 1, wherein the stator teeth comprise:
a winding portion around which the first stator winding is wound;
an internal tooth portion connected to one end of the winding portion facing the rotor assembly;
an external tooth portion connected to one end of the winding portion facing away from the rotor assembly;
The stator groove is formed by arranging two adjacent winding parts at intervals, wherein the sizes of the inner tooth parts and the outer tooth parts in the circumferential direction of the output shaft are larger than the sizes of the winding parts in the circumferential direction of the output shaft; and/or two adjacent inner tooth parts extend oppositely, and a plurality of inner tooth parts enclose a cylindrical space for accommodating the rotor assembly and the output shaft.
8. The vibration motor of claim 7, wherein each of the stator teeth further comprises:
a connecting portion, wherein two adjacent internal tooth portions are connected through one connecting portion or a plurality of connecting portions at intervals; and/or two adjacent external tooth parts are connected through one connecting part or a plurality of connecting parts at intervals.
9. The vibration motor of claim 7, wherein each of the stator teeth further comprises:
and two magnetism collecting parts which are respectively arranged at two ends of the inner tooth part in the circumferential direction of the output shaft and are protruded from the inner tooth part to the output shaft.
10. The vibration motor according to claim 1, wherein a reciprocating rotation angle of the output shaft is 4 degrees or more and 5 degrees or less; and/or, the number of the rotor magnet part is greater than or equal to N35.
11. The vibration motor according to any one of claims 1 to 10, further comprising:
the vibrator assembly is sleeved on the output shaft and is arranged at intervals with the rotor assembly, the vibrator assembly is provided with a plurality of vibrator magnet parts distributed along the axial direction of the output shaft, each vibrator magnet part is provided with a vibrator magnetic pole, the vibrator magnetic poles are arranged in pairs along the axial direction of the output shaft, and the polarities of the two magnetic poles of the same pair of vibrator magnetic poles are opposite;
the second stator assembly is arranged on the periphery of the vibrator assembly in a surrounding mode and comprises a second stator iron core and a second stator winding, the second stator iron core comprises a plurality of iron core rings which are arranged at intervals along the axial direction of the output shaft, a winding space is formed between every two adjacent iron core rings, and the second stator winding is located in the winding space and is arranged at intervals with the iron core rings;
when the second stator winding is electrified, the iron core rings generate paired second stator magnetic poles at two ends of the output shaft in the axial direction, and the polarities of the two second stator magnetic poles of the same pair are opposite to each other so as to drive the vibrator assembly and the output shaft to reciprocate along the axial direction of the output shaft.
12. The vibration motor of claim 11, further comprising:
the second support is arranged on the periphery of the vibrator assembly in a surrounding mode and is provided with a plurality of iron core installation annular grooves and a plurality of winding installation annular grooves, the second support is an insulating piece, the iron core installation annular grooves and the winding installation annular grooves are sequentially and alternately arranged along the axial direction of the output shaft, the iron core rings are arranged in the iron core installation annular grooves, the second stator winding is arranged in the winding installation annular grooves, and the winding space comprises the winding installation annular grooves.
13. The vibration motor according to claim 12, wherein,
one of the groove wall of the iron core mounting groove and the iron core ring is provided with a positioning part, the other one of the groove wall of the iron core mounting groove and the iron core ring is provided with a positioning groove, and the positioning part is positioned in the positioning groove so as to position the iron core ring; and/or
The second bracket and the iron core ring are also provided with wiring grooves, and the wiring grooves are communicated with two adjacent winding installation ring grooves so that the second stator winding can be wired in the two adjacent winding installation ring grooves through the wiring grooves.
14. The vibration motor of claim 11, further comprising at least one set of elastic members, at least one set of the elastic members being located on either side of the entirety of the rotor member and the vibrator member in the axial direction of the output shaft; each of the elastic components comprises:
the inner ring of the bearing is sleeved on the output shaft;
the end cover is arranged around the periphery of the bearing;
the elastic piece is connected with the outer ring of the bearing and the end cover;
the bearing is elastically deformed when the bearing moves along the axial direction of the output shaft in a reciprocating mode along the axial direction of the output shaft.
15. The vibration motor of claim 14, wherein the number of the elastic components is two, and the two elastic components are positioned on opposite sides of the whole body formed by the rotor component and the vibrator component in the axial direction of the output shaft; and/or the number of the groups of groups,
the elastic piece is an elastic piece, one end of the elastic piece is fixedly connected with the end cover, the elastic piece extends from the end cover to the bearing in a spiral shape, the other end of the elastic piece is provided with a plug hole, and the outer ring of the bearing is plugged in the plug hole.
16. A vibration motor, characterized by comprising:
an output shaft;
the first magnetic ring is sleeved on the output shaft and is configured to be magnetized along the outer diameter of the first magnetic ring in a multipolar magnetizing mode so as to form a plurality of rotor magnet parts on the outer peripheral wall of the first magnetic ring, the polarities of two adjacent rotor magnet parts are opposite and comprise a south pole and a north pole, and in the first magnetic ring, a magnetic induction line points to the two adjacent north poles from the south pole;
the first stator assembly comprises a stator core and a first stator winding, the stator core is sleeved on the periphery of the rotor winding, the stator core comprises a plurality of stator teeth distributed around the circumference of the first magnetic ring, stator grooves are formed between two adjacent stator teeth, and the first stator winding is wound on the plurality of stator teeth and is positioned in the stator grooves;
when the first stator winding is electrified, one end of the stator teeth, which faces the first magnetic ring, generates a plurality of first stator magnetic poles, and the polarities of two adjacent first stator magnetic poles are opposite to each other so as to drive the first magnetic ring and the output shaft to rotate back and forth around the circumferential direction of the output shaft.
17. The vibration motor of claim 16, further comprising:
the vibrator assembly is sleeved on the output shaft and is arranged at intervals with the rotor assembly, the vibrator assembly is provided with a plurality of vibrator magnet parts distributed along the axial direction of the output shaft, each vibrator magnet part is provided with a vibrator magnetic pole, the vibrator magnetic poles are arranged in pairs along the axial direction of the output shaft, and the polarities of two magnetic poles in the same pair of vibrator magnetic poles are opposite;
the second stator assembly is arranged on the periphery of the vibrator assembly in a surrounding mode and comprises a second stator iron core and a second stator winding, the second stator iron core comprises a plurality of iron core rings which are arranged at intervals along the axial direction of the output shaft, a winding space is formed between every two adjacent iron core rings, and the second stator winding is located in the winding space and is arranged at intervals with the iron core rings;
when the first stator winding is electrified, one end of the stator teeth, which faces the rotor assembly, generates a plurality of first stator magnetic poles, 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 so as to drive the rotor assembly and the output shaft to rotate in a reciprocating manner around the axial direction of the output shaft.
18. An electric toothbrush, comprising:
a vibration motor as claimed in any one of claims 1 to 17;
the rotor component and the first stator component are 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 is detachably connected with one end of the output shaft, which is positioned outside the brush handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211114194.9A CN117639427A (en) | 2022-09-09 | 2022-09-09 | Electric toothbrush and vibrating motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211114194.9A CN117639427A (en) | 2022-09-09 | 2022-09-09 | Electric toothbrush and vibrating motor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117639427A true CN117639427A (en) | 2024-03-01 |
Family
ID=90025875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211114194.9A Pending CN117639427A (en) | 2022-09-09 | 2022-09-09 | Electric toothbrush and vibrating motor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117639427A (en) |
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2022
- 2022-09-09 CN CN202211114194.9A patent/CN117639427A/en active Pending
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