CN109861488B - Magnetic suspension assembly and electric toothbrush - Google Patents
Magnetic suspension assembly and electric toothbrush Download PDFInfo
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- CN109861488B CN109861488B CN201910219849.0A CN201910219849A CN109861488B CN 109861488 B CN109861488 B CN 109861488B CN 201910219849 A CN201910219849 A CN 201910219849A CN 109861488 B CN109861488 B CN 109861488B
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- 239000000725 suspension Substances 0.000 title claims abstract description 45
- 238000005339 levitation Methods 0.000 claims description 32
- 238000001746 injection moulding Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 17
- 238000009434 installation Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229940034610 toothpaste Drugs 0.000 description 3
- 239000000606 toothpaste Substances 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002324 mouth wash Substances 0.000 description 2
- 229940051866 mouthwash Drugs 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Abstract
The invention provides a magnetic suspension assembly and an electric toothbrush, which belong to the technical field of brush products, wherein the magnetic suspension assembly comprises a hollow stator, a hollow rotor arranged in the stator, a swinging shaft arranged in the rotor and at least one magnet group, wherein the magnet group comprises two magnetic sheets which are attracted with each other, arc-shaped clamping parts are arranged on two opposite sides of the inner wall of the stator, the two magnetic sheets are arranged between the two arc-shaped clamping parts, the surface, close to the arc-shaped clamping parts, of the magnetic sheets is an arc surface matched with the arc-shaped clamping parts, the rotor is arranged between the two magnetic sheets of the magnet group, a coil is wound on the side wall of the stator, and the coil is used for being electrified by an external power supply so as to enable the rotor and the magnet group to rotate in the stator. According to the magnetic suspension assembly provided by the embodiment of the invention, the swinging shaft swings and drives the outer part through the magnetic suspension principle, and the magnetic suspension assembly is compact and exquisite and has stronger vibration force through injection molding.
Description
Technical Field
The invention relates to the technical field of brush products, in particular to a magnetic suspension assembly and an electric toothbrush.
Background
The electric toothbrush can make the brush head generate high-frequency vibration through the rapid rotation or vibration of the motor core, instantly decompose toothpaste into fine foam, deeply clean the gaps between teeth, and meanwhile, the vibration of the brush hair can promote the blood circulation of the oral cavity and has a massaging effect on gum tissues.
The motor of the electric toothbrush is an important part in the electric toothbrush and provides power for the electric toothbrush, the existing motor of the electric toothbrush is usually provided with a steel wire or a steel sheet for fixing a swinging shaft, and the motor of the electric toothbrush is arranged in a shell of the electric toothbrush, so that the motor of the electric toothbrush is unstable in vibration and affects the service life.
Disclosure of Invention
The invention aims to provide a magnetic suspension assembly and an electric toothbrush, which are stable in vibration, compact, exquisite and simple and convenient to manufacture.
Embodiments of the present invention are implemented as follows:
the embodiment of the invention provides a magnetic suspension assembly, which comprises a hollow stator, a hollow rotor arranged in the stator, a swinging shaft arranged in the rotor and at least one magnet group, wherein the magnet group comprises two magnetic sheets which are attracted with each other, arc-shaped clamping parts are arranged on two opposite sides of the inner wall of the stator, the two magnetic sheets are arranged between the two arc-shaped clamping parts, the surface, close to the arc-shaped clamping parts, of the magnetic sheets is an arc surface matched with the arc-shaped clamping parts, the rotor is arranged between the two magnetic sheets of the magnet group, a coil is wound on the side wall of the stator and is used for being electrified by an external power supply so as to enable the rotor and the magnet group to rotate in the stator.
Optionally, the arc clamping part is provided with a first groove, and the cambered surface of the magnetic sheet is provided with a second groove.
Optionally, the swing shaft is a hollow shaft.
Optionally, a stator bracket is arranged at the periphery of the stator, and a wire clamping rod is arranged on the stator bracket and used for clamping the coil.
Optionally, the coil is an enamelled coil, and an insulating tape is arranged outside the enamelled coil.
Optionally, an insulating shell and a wire baffle are arranged in the stator, and the wire baffle is used for clamping the bundle coil.
Optionally, the magnetic suspension assembly further comprises a front cover and a rear cover, two ends of the swinging shaft are respectively connected with the front cover and the rear cover through bearings, and one end of the swinging shaft penetrates out of the front cover.
Optionally, the front end of the swinging shaft is provided with a thread, the threaded end of the swinging shaft is arranged in the rotor, the rotor is also internally provided with a positioning shaft, and the threaded end of the swinging shaft and one end of the positioning shaft are spaced in the rotor.
Optionally, the magnetic suspension assembly further comprises a front cover and a rear cover, the swinging shaft is connected with the front cover, the swinging shaft penetrates out of the front cover, and the other end of the positioning shaft is connected with the rear cover.
Optionally, the axial centerline of the swing axle is not collinear with the centerline lines of the front and rear covers.
Optionally, the magnetic suspension assembly includes shell and center back lid, and the both ends of oscillating axle are connected with the one end and the center back lid of shell respectively through the bearing, and the one end of oscillating axle wears out the one end of shell, and the center back lid sets up the other end at the shell.
Optionally, the axial centerline of the swing axle is collinear with the centerline line of the housing and the rear cover.
The embodiment of the invention provides an electric toothbrush which comprises a power supply, a brush head, a brush handle and the magnetic suspension assembly, wherein the power supply is connected with a coil of the magnetic suspension assembly, the brush head is connected with a swinging shaft of the magnetic suspension assembly, and the magnetic suspension assembly and the power supply are positioned in the brush handle.
The magnetic suspension assembly comprises a hollow stator, a hollow rotor arranged in the stator, a swinging shaft arranged in the rotor and at least one magnet group, wherein the magnet group comprises two magnetic sheets which are attracted with each other, arc-shaped clamping parts are arranged on two opposite sides of the inner wall of the stator, the two magnetic sheets are arranged between the two arc-shaped clamping parts, the surface, close to the arc-shaped clamping parts, of the magnetic sheets is an arc surface matched with the arc-shaped clamping parts, the rotor is arranged between the two magnetic sheets of the magnet group, a coil is wound on the side wall of the stator and is used for being electrified by an external power supply, so that the rotor and the magnet group rotate in the stator. According to the magnetic suspension assembly provided by the embodiment of the invention, the swinging shaft swings through a magnetic suspension principle, the outer part is driven, the structure is compact and exquisite, and the vibration force is stronger.
The electric toothbrush provided by the embodiment of the invention comprises a power supply, a brush head, a brush handle and the magnetic suspension assembly, wherein the power supply is connected with a coil of the magnetic suspension assembly, the brush head is connected with a swinging shaft of the magnetic suspension assembly, and the magnetic suspension assembly and the power supply are positioned in the brush handle. The electric toothbrush provided by the embodiment of the invention creates a magnetic field through current, a magnetic suspension space is manufactured, the frequency is directly controlled through the current frequency, physical friction is reduced, noise is hardly generated, the magnetic suspension electric toothbrush swings through the swinging shaft, vibration is concentrated on the brush head part, the vibration of the brush handle is small, palm is not numb due to the vibration of the brush handle, the use is stable, the vibration effect is good, the structure is exquisite, and the cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a magnetic levitation assembly according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an installation structure of a stator, a rotor and a coil of a magnetic levitation assembly according to a first view angle provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of an installation structure of a stator, a rotor and a coil of a magnetic levitation assembly according to a second view angle provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of an exploded view of a magnetic levitation assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a magnetic sheet of a magnetic levitation assembly according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a magnetic levitation component according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an installation structure of a coil, an insulating case and a wire baffle of a magnetic levitation assembly according to a first view angle provided by an embodiment of the present invention;
fig. 8 is a schematic diagram of an installation structure of a coil, an insulating case and a wire baffle of the magnetic levitation assembly according to a second view angle provided by the embodiment of the invention;
fig. 9 is a schematic diagram of an installation structure of a coil, an insulating case and a wire baffle of a magnetic levitation assembly according to a third view angle provided by an embodiment of the present invention;
FIG. 10 is a schematic diagram of a magnetic levitation component according to a second embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a stator of a magnetic levitation assembly according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of a stator of a magnetic levitation assembly according to a second embodiment of the present invention;
fig. 13 is a schematic diagram of an insulation shell arrangement structure of a magnetic levitation assembly according to an embodiment of the present invention;
fig. 14 is a schematic view of a first view angle structure of a wire baffle of a magnetic levitation assembly according to an embodiment of the present invention;
fig. 15 is a schematic view of a second view angle structure of a wire baffle of a magnetic levitation assembly according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a first swing shaft of a magnetic levitation assembly according to an embodiment of the present invention;
FIG. 17 is a schematic diagram illustrating the internal structures of a first swing shaft and a positioning shaft of a magnetic levitation assembly according to an embodiment of the present invention;
fig. 18 is a schematic structural diagram of a magnet assembly of a magnetic levitation assembly according to an embodiment of the present invention;
fig. 19 is a schematic diagram illustrating a direction setting of a magnet assembly of a magnetic levitation assembly according to an embodiment of the present invention.
10-swinging shaft; 10A-a first swing axle; 20-rotor; 30-magnetic sheets; 31-a second groove; 40-stator; 40A-a first stator; 40B-a second stator; 41-an arc-shaped clamping part; 42-a first groove; 50-coils; 51-insulating tape; 60-stator support; 61-wire clamping rod; 62-connecting part; 63-an insulating shell; 64-wire baffle plate; 65-clamping hooks; 70-a housing; 80-positioning the shaft; 90-bearings; 100-a rear cover; 100A-a central rear cover; 101-a central connection hole; 110-screws; 120-front cover; 121-front cover attachment holes.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhanging, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1 and 2, an embodiment of the present invention provides a magnetic levitation assembly, which includes a rotor 20, a stator 40, a magnet set, a coil 50, a swing shaft 10, a stator bracket 60, a front cover 120 and a rear cover 100.
As shown in fig. 4, the rotor 20 has a hollow structure, the swing shaft 10 is coaxially inserted into the rotor 20, two ends of the swing shaft 10 are respectively connected with the front cover 120 and the rear cover 100 through bearings 90, and the swing shaft 10 extends out of the front cover 120 to be connected with an external part to drive the external part to swing. The swinging shaft 10 can also be a hollow shaft, so that the product design and more purposes are facilitated, for example, toothpaste, mouthwash and the like can be stored in the hollow swinging shaft 10, and when the hollow swinging shaft 10 is connected with the toothbrush head, toothpaste foam, mouthwash and the like can be sprayed. The swinging shaft 10 can be made of metal, and the metal swinging shaft 10 has high mechanical strength, good durability and difficult aging.
As shown in fig. 4, the outer side wall of the rotor 20 is provided with a magnet set, the magnet set includes two magnetic sheets 30 that are attracted to each other, that is, two opposite sides of the two magnetic sheets 30 of the magnet set are attracted to each other, as shown in fig. 2, the rotor 20 is disposed between the two magnetic sheets 30, the two magnetic sheets 30 are tightly attached to the two opposite outer side walls of the rotor 20, and the rotor 20 and the two magnetic sheets 30 are suspended in the stator 40.
As shown in fig. 4, illustratively, the stator 40 is open at both ends and has three sides to form a semi-closed structure. The stator 40 is made of silicon steel sheet, the silicon steel sheet is ferrosilicon soft magnetic alloy with extremely low carbon content, and the resistivity and the maximum magnetic permeability are higher, the coercive force, the iron core loss (iron loss) and the magnetic aging are lower, so that the generation of a magnetic field is facilitated.
As shown in fig. 3, the two opposite sides of the inner wall of the stator 40 are provided with arc clamping portions 41, the rotor 20 and the two magnetic sheets 30 are arranged between the two arc clamping portions 41 of the stator 40, the rotor 20 and the magnetic sheets 30 are not in contact with the inner wall of the stator 40, the magnetic sheets 30 are arc-shaped magnetic sheets, the surface of the magnetic sheets 30, which is close to the arc inner wall of the arc clamping portions 41, is arc-shaped, the arc shape of the arc is matched with the arc shape of the arc inner wall of the arc clamping portions 41, so that the distances between the arc-shaped surface of the magnetic sheets 30 and the arc inner wall of the arc clamping portions 41 can be kept basically consistent at all points, the magnetic force generated between the arc-shaped surface of the magnetic sheets 30 and the arc inner wall of the arc clamping portions 41 can be consistent, the magnetic sheets 30 and the rotor 20 can be kept to rotate stably in the stator 40, and the phenomenon that the magnetic force at all positions is uneven due to the fact that the distances between the arc-shaped surface of the magnetic sheets 30 and the arc inner wall of the arc clamping portions 41 are not equal is avoided, and the phenomenon that the magnetic sheets 30 and the rotor 20 rotate unstably in the stator 40 is bumped the inner wall of the stator 40 is avoided.
The arc inner wall of the arc clamping part 41 is provided with the first groove 42, the arc inner wall of the arc clamping part 41 is divided into an upper part and a lower part by the first groove 42, as shown in fig. 5, the arc surface of the magnetic sheet 30 can be further provided with the second groove 31, the arc surface of the magnetic sheet 30 is divided into an upper part and a lower part by the second groove 31, so that the magnetism of the arc inner wall of the arc clamping part 41 and the middle position of the arc surface of the magnetic sheet 30 can be weakened, the magnetism is concentrated by taking the first groove 42 and the second groove 31 as central lines, and the swing amplitude of the swing shaft 10 can be larger.
As shown in fig. 4, a coil 50 is wound on one side wall of the stator 40, the coil 50 is an enamelled coil, an insulating tape 51 is arranged outside the coil 50, as shown in fig. 2, the coil 50 is wound on the other side wall of the stator 40 connected with the two side walls provided with the arc-shaped clamping parts 41 from inside to outside, after the coil 50 is externally connected with a power supply, a magnetic field is generated, the current changes to form a changing magnetic field in the stator 40, and the magnetic field drives the magnetic sheet 30 and the rotor 20 to rotate in the stator 40, so that the swinging shaft 10 swings; specifically, after the coil 50 is energized, a resonant circuit is generated to generate an S pole and an N pole on the arc inner wall of the stator 40, the magnetic sheet 30 has two magnetic poles, the S pole of the stator 40 corresponds to the N pole of the magnetic sheet 30, the N pole of the stator 40 corresponds to the S pole of the magnetic sheet 30, and the rotor 20 and the stator 40 repeatedly generate a magnetic field with opposite and opposite attraction to each other to enable the rotor 20 to swing left and right. The coil 50 is electrified to generate a magnetic field in the stator 40, the stator 40 wraps the rotor 20 and the magnetic sheet 30, and the rotor 20 and the magnetic sheet 30 overcome the gravity thereof by utilizing the magnetic force through the magnetic levitation principle, so that the rotor 20 and the magnetic sheet 30 are suspended in the stator 40.
As shown in fig. 4, a stator bracket 60 is disposed on the outer side of the stator 40, a plurality of wire clamping rods 61 are disposed on the stator bracket 60 for clamping the wire bundle coils 50, the coils 50 are wound on a side wall of the stator 40, wire bundles are scattered from the ends of the coils 50, the wire clamping rods 61 are used for clamping the wire bundles scattered from the wire bundle coils 50, a connecting portion 62 is further disposed on the stator bracket 60, and threaded holes are disposed on the connecting portion 62. The stator bracket 60 can be injection molded, and has simple and convenient process and low processing cost.
The front cover 120 and the rear cover 100 are respectively arranged at two ends of the stator bracket 60 to form a containing cavity, the rotor 20, the stator 40, the magnet group, the coil 50, the swinging shaft 10 and other components are wrapped in the containing cavity, the screw 110 penetrates through the front cover 120 and the rear cover 100 to be matched and connected with the threaded hole on the connecting part 62 on the stator bracket 60, the front cover 120, the rear cover 100 and the stator bracket 60 are connected into a whole, and the front cover 120 and the rear cover 100 can be made of plastics and are light and durable.
Further, when the front cover 120 and the rear cover 100 are connected to two ends of the swing shaft 10, the front cover 120 and the rear cover 100 are both provided with connection holes, and two ends of the swing shaft 10 are respectively inserted into the connection holes of the front cover 120 and the rear cover 100 through the bearings 90, as shown in fig. 4, the front cover 120 is provided with a front cover connection hole 121, and the connection holes (not shown in the drawing) of the front cover 121 and the rear cover 100 of the front cover 120 are not arranged at the central positions of the front cover 120 and the rear cover 100, i.e. are eccentrically arranged, so that when the swing shaft 10 is connected to the front cover 120 and the rear cover 100, the swing shaft 10 and the rotor 20 are located at the eccentric positions of the whole magnetic suspension assembly, thus the accuracy in processing and mounting is not required too much, and the cost of processing and mounting is facilitated to be reduced.
The magnetic suspension assembly of the embodiment is formed by integral injection molding, is integrally formed, and has simple and convenient process and high production efficiency. Specifically, the swinging shaft 10 and the rotor 20 are integrally injection molded in the stator 40, so that the structure and the process are simple and convenient, the part of the swinging shaft 10 in the rotor 20 can be firmly connected, the swinging amplitude of the part of the swinging shaft 10 outside the rotor 20 is larger, and the vibration force is stronger.
According to the magnetic suspension assembly provided by the embodiment of the invention, the swing shaft 10 swings through a magnetic suspension principle, the outer part is driven to vibrate, and the magnetic suspension assembly is integrally formed through injection molding, so that the magnetic suspension assembly is compact and exquisite in structure, high in vibration force, eccentric in arrangement and low in processing cost.
Example two
The stator 40 in the first embodiment is modified, the stator bracket 60 is replaced by the insulating shell 63 in fig. 13 and the wire baffle plate 64 in fig. 14 and 15, and the components are wrapped and fixed by the outer shell 70 and the central rear cover 100A to form the magnetic suspension assembly in the embodiment shown in fig. 6.
Specifically, the stator 40 may be a semi-closed structure with two open ends and four sides as shown in fig. 11, or the stator 40 may be a combination of two split first and second stators 40A and 40B as shown in fig. 12. An insulating shell 63 and a wire baffle plate 64 are arranged in the stator 40, and a clamping hook 65 for clamping the coil 50 is arranged on the wire baffle plate 64.
As shown in fig. 8 and 9, the side walls in the first stator 40A and the second stator 40B are respectively provided with a coil 50, the coil 50 is wound between the first stator 40A (the second stator 40B) and the arc-shaped clamping portion 41, two insulating shells 63 are respectively provided in the side walls of the first stator 40A and the second stator 40B, and the four insulating shells 63 wrap the coil 50 as shown in fig. 10, so as to prevent electric shock, and good insulation can ensure safe operation when the magnetic suspension assembly of the embodiment is used, and prevent personal electric shock accidents. Wire retaining plates 64 are respectively arranged above and below the inner wall of the combined stator formed by combining the first stator 40A and the second stator 40B and used for clamping the ends of the bundle coil 50.
As shown in fig. 7 and 10, in this embodiment, the periphery of the housing 70 is closed, two ends are opened, one end of the housing 70 is fixed to the swing shaft 10 through the bearing 90, the housing 70 is made of metal, the metal strength is high, and each component in the housing 70 can be well wrapped. The central connecting hole 101 of the central rear cover 100A is disposed at the central position of the central rear cover 100A, and the axial center line of the swing shaft 10 coincides with the axial center line of the central rear cover 100A, that is, the magnetic suspension assembly of the embodiment is disposed at a center which is symmetrically disposed with the axial center line of the swing shaft 10 as the center line.
Example III
In the first and second embodiments, the rotor 20 is internally threaded with the swing shaft 10, the swing shaft 10 may be a hollow shaft, and two ends of the swing shaft 10 are respectively connected with the front cover 120 and the rear cover 100 in the first embodiment (or connected with one end of the housing 70 and the central rear cover 100A in the second embodiment) through the bearings 90, and the swing shaft 10 extends out of the front cover 120 (or one end of the housing 70).
In this embodiment, the swing shaft 10 is a first swing shaft 10A as shown in fig. 16, the rotor 20 is coaxially provided with a first swing shaft 10A and a positioning shaft 80, one end of the first swing shaft 10A is connected to the front cover 120 (or one end of the housing 70) through a bearing 90, one end of the positioning shaft 80 is connected to the rear cover 100 (or the central rear cover 100A) through a bearing 90, as shown in fig. 17, the other ends of the first swing shaft 10A and the positioning shaft 80 are both disposed in the rotor 20, and the ends of the first swing shaft 10A and the positioning shaft 80 in the rotor 20 are not connected.
The end of the first swing shaft 10A inside the rotor 20 is not connected to the positioning shaft 80 by the positioning shaft 80 being connected to the rear cover 100 (or the center rear cover 100A) for fixing the position of the rotor 20, so that it is convenient to replace different first swing shafts 10A according to different demands of customers.
As shown in fig. 16, the end portion of the first swing shaft 10A disposed in the rotor 20 is provided with threads, so that when the first swing shaft 10A and the rotor 20 are injection molded, the first swing shaft 10A and the rotor 20 can be fixed more tightly by extruding the threads into the inner wall of the rotor 20, thereby facilitating injection molding.
Example IV
In the first embodiment and the second embodiment, the magnet assembly may include a plurality of magnet assemblies, where each magnet assembly includes two oppositely disposed and attracted magnetic sheets 30, and the plurality of magnet assemblies are disposed on the outer sidewall of the rotor 20.
For example, as shown in fig. 18, two magnet groups, that is, four magnet pieces 30 are disposed on the rotor 20, four clamping grooves are correspondingly disposed on the outer side wall of the rotor 20, the four magnet pieces 30 are correspondingly disposed in the four clamping grooves of the rotor 20, the four magnet pieces 30 are disposed in directions as shown in fig. 19, two opposite magnet pieces 30 are disposed in a suction manner, that is, two magnet pieces 30 disposed diagonally opposite to each other are disposed in a suction manner, and two magnet pieces 30 disposed close to the arc-shaped clamping portion 41 on the same side are disposed in a suction manner.
The plurality of magnet groups are arranged in the manner, so that the rotation amplitude of the rotor 20 in the stator 40 is larger, and the vibration of the swinging shaft 10 is stronger.
Example five
The embodiment of the invention provides an electric toothbrush which comprises a power supply, a brush head, a brush handle and the magnetic suspension assembly, wherein the power supply is connected with a coil 50 of the magnetic suspension assembly, the brush head is connected with a swinging shaft 10 of the magnetic suspension assembly, and the magnetic suspension assembly and the power supply are positioned in the brush handle.
The electric toothbrush provided by the embodiment of the invention produces a magnetic field through current, a magnetic suspension space is manufactured, the frequency is directly controlled through the current frequency, physical friction is reduced, noise is hardly generated, the magnetic suspension electric toothbrush swings through the swinging shaft 10, vibration is concentrated on the brush head part, the vibration of the brush handle is small, palm is not numb due to the vibration of the brush handle, the use is stable, the vibration effect is good, the structure is exquisite, and the cost is low.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A magnetic levitation assembly comprising: the rotor is arranged between the two magnetic sheets of the magnet group, and the side wall of the stator is wound with a coil which is used for being electrified by an external power supply so as to enable the rotor and the magnet group to rotate in the stator; the arc clamping part is provided with a first groove, and the cambered surface of the magnetic sheet is provided with a second groove; the swing shaft is a hollow shaft.
2. The magnetic levitation assembly of claim 1, wherein a stator support is disposed on the outer periphery of the stator, and a wire clamping rod is disposed on the stator support and used for clamping the coil.
3. The magnetic levitation assembly of claim 1, wherein the coil is an enameled coil, and an insulating tape is further disposed outside the enameled coil.
4. The magnetic levitation assembly of claim 1, wherein an insulating housing and a wire retainer are disposed within the stator, the wire retainer being configured to retain the coil.
5. The magnetic levitation assembly of claim 2, further comprising a front cover and a rear cover, wherein two ends of the swing shaft are respectively connected with the front cover and the rear cover through bearings, and one end of the swing shaft penetrates out of the front cover.
6. The magnetic levitation assembly of claim 1, wherein the front end of the oscillating shaft is provided with threads, the threaded end of the oscillating shaft is disposed in the rotor, a positioning shaft is further disposed in the rotor, and the threaded end of the oscillating shaft and one end of the positioning shaft are spaced apart in the rotor.
7. The magnetic levitation assembly of claim 6, further comprising a front cover and a rear cover, wherein the swing shaft is connected to the front cover, the swing shaft penetrates the front cover, and the other end of the positioning shaft is connected to the rear cover.
8. The magnetic levitation assembly of claim 5, wherein an axial centerline of the swing shaft is non-collinear with a centerline line of the front cover and the rear cover.
9. The magnetic levitation assembly of claim 4, wherein the magnetic levitation assembly comprises a housing and a central rear cover, two ends of the swinging shaft are respectively connected with one end of the housing and the central rear cover through bearings, one end of the swinging shaft penetrates out of one end of the housing, and the central rear cover is arranged at the other end of the housing.
10. The magnetic levitation assembly of claim 9, wherein an axial centerline of the swing shaft is collinear with a centerline line of the housing and the rear cover.
11. An electric toothbrush comprising a power source, a brush head, a brush handle and a magnetic suspension assembly according to any one of claims 1-10, wherein the power source is connected to a coil of the magnetic suspension assembly, the brush head is connected to a swinging shaft of the magnetic suspension assembly, and the magnetic suspension assembly and the power source are located in the brush handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910219849.0A CN109861488B (en) | 2019-03-21 | 2019-03-21 | Magnetic suspension assembly and electric toothbrush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN211266801U (en) * | 2020-01-20 | 2020-08-14 | 宁波东特电器有限公司 | Magnetic suspension vibration motor with conductive part and nursing appliance adopting same |
| CN113270991A (en) * | 2021-06-29 | 2021-08-17 | 浙江省东阳市东磁诚基电子有限公司 | Large-displacement linear motor and implementation method thereof |
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