CN218997786U

CN218997786U - Electric toothbrush motor with integrated stator core

Info

Publication number: CN218997786U
Application number: CN202223272411.5U
Authority: CN
Inventors: 曹天佑
Original assignee: Dongguan Chiqu Motor Co ltd
Current assignee: Dongguan Chiqu Motor Co ltd; Shenzhen Sushi Technology Co Ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-09
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses an electric toothbrush motor with an integrated stator core, which comprises a shell, at least one pair of iron cores, a rotor and a magnetic conduction bridge, wherein the pair of iron cores are integrally embedded on two sides of the shell, coil windings are wound on the pair of iron cores, the rotor is arranged in the shell, the pair of iron cores are matched with the rotor in a coaxial mode, the magnetic conduction bridge is arranged on the shell, and the pair of iron cores are mutually in magnetic conduction fit through the magnetic conduction bridge. Therefore, when the motor is assembled, only the rotor and the magnetic conduction bridge are required to be installed on the shell, parts which are required to be assembled manually are fewer, the iron core and the shell are integrated and are matched with the rotor coaxially, and the iron core is not required to be assembled manually for the second time, so that the concentricity tolerance of the stator iron core and the rotor is smaller, the assembly tolerance of the motor is effectively reduced, the accumulated tolerance is also effectively reduced, the vibration of the rotor is smaller when the rotor rotates at a high speed, the noise when the motor is effectively reduced, the consistency of various parameters of the motor is ensured, and the quality stability of the mass-produced motor is greatly improved.

Description

Electric toothbrush motor with integrated stator core

Technical Field

The utility model relates to the technical field of motors, in particular to an electric toothbrush motor with an integrated stator core.

Background

As is well known, a motor, also called an electric motor, refers to an electromagnetic device that converts or transmits electric energy according to the law of electromagnetic induction. The motor (symbol M) and the generator (symbol G) are divided.

The electric toothbrush mainly comprises a shell, a motor and a brush head, wherein the brush head generates high-frequency vibration through the rapid operation of the motor, and toothpaste is instantaneously decomposed into fine foam and deeply cleans tooth gaps. The motor is an important component of the electric toothbrush. The existing motor mainly comprises a stator core, a rotor and a shell, the stator core is generally arranged on the shell, the rotor is arranged at the axle center in the shell, the motor parts are more and complex to install, when the motor is assembled, the stator core and the rotor need to be manually assembled on the shell for the second time, and then the concentricity tolerance of the stator core and the rotor is larger, the tolerance accumulation value between each part is larger, when the stator core and the rotor are not concentric, the rotor can cause severe vibration when rotating at a high speed, and larger noise is generated, meanwhile, the consistency of each parameter of the motor is worse when mass production, and the quality of the mass produced motor is unstable, for example: chinese patent No. CN202120421509.9 discloses a split stator core and motor for electric toothbrush; in addition, some electric toothbrush motors are provided with copper wires wound on the rotor for the convenience of winding copper wires, and the copper wires cannot be uniformly distributed on the circumferential side surface of the rotor in a circumferential array, but the structure is easy to cause unbalanced mass distribution of the rotor, and the rotor is easy to generate jumping type vibration noise during high-speed operation;

the existing motor also uses the waveform gasket to pretighten the bearing on the motor rotor, but the elastic coefficient K value of the waveform gasket is larger and unstable, the pretightening force of the bearing is unstable, the phenomenon that the bearing is damaged due to the fact that the bearing is not pretightened or is expected to be too large occurs, the shell of some motors is divided into a front shell and a rear cover, the bearing is respectively arranged on the front shell and the rear cover, the rotor is arranged in the front shell, then the rear cover is adapted to be arranged on the front shell, the two ends of an electrode main shaft on the rotor are respectively inserted on the bearings arranged in the front shell and the rear cover, and due to the fact that errors exist in manufacturing and installation of the front shell and the rear cover, the coaxiality tolerance of the bearing in the front shell and the rear cover is very large after the motor is assembled, the bearing cannot smoothly rotate and can generate noise, and serious abrasion and scrapping of the bearing due to poor coaxiality can be caused, for example: the utility model patent CN202020520617.7 discloses a novel acoustic wave motor with integrally formed stator, so the above defects are obvious, and for this reason we propose an electric toothbrush motor with integrally formed stator core for solving the above problems.

Disclosure of Invention

In view of the above-mentioned shortcomings in the prior art, an object of the present utility model is to provide an electric toothbrush motor with an integrated stator core.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an electric toothbrush motor of integral type stator core, includes shell, at least a pair of iron core, rotor and magnetic bridge, a pair of the iron core is integrated to be inlayed in the both sides of shell, a pair of all around having coil winding on the iron core, the rotor is installed in the shell, a pair of iron core and the coaxial adaptation of rotor, magnetic bridge installs on the shell to with the mutual magnetic conduction cooperation of a pair of iron core through magnetic bridge.

Preferably, the shell is provided with a containing cavity penetrating through the shell, locating grooves with the same axle center are formed in the coelent portions at two ends of the containing cavity, bearings are arranged in the locating grooves, two ends of a main shaft of the rotor are inserted and arranged on the bearings, and glue is arranged at the locating grooves and the positions located at the bearings.

Preferably, the holding groove has been seted up to the both sides face of shell and be located coil winding department, a pair of iron core one end exposes in holding groove department, the magnetic bridge is located to be fixed in the holding groove, the both ends and the iron core laminating of magnetic bridge.

Preferably, the magnetic bridge comprises at least two 'C' -shaped bodies, the peripheral side face of the shell and the part positioned at the coil winding are provided with mounting grooves, one end of the iron core is exposed out of the mounting grooves, the two 'C' -shaped bodies are lapped in the mounting grooves through openings of the two 'C' -shaped bodies, fixed mounting is formed, the openings of the two 'C' -shaped bodies are mutually attached, and the inner walls of the two 'C' -shaped bodies are attached to the iron core.

Preferably, the two sides of the shell and the iron core are provided with storage grooves, the coil windings are embedded in the storage grooves, and one ends of the coil windings are exposed out of the notch of the storage grooves.

Preferably, the tail part of the shell is provided with a wiring groove, and the wiring groove is communicated with the storage grooves on two sides of the shell.

Preferably, one end of the pair of iron cores is provided with a mosaic part in a shape of "C".

By adopting the scheme, compared with the prior art, the utility model has the following obvious advantages and beneficial effects:

1. firstly, the iron core is embedded on two sides of the shell in an injection molding manner, so that the iron core and the shell are integrated, the coil winding is wound on the iron core, the iron core is matched with the rotor in a coaxial manner, and the magnetic bridge is used for conducting and matching a pair of iron cores mutually magnetically, so that only the rotor and the magnetic bridge need to be installed on the shell when the motor is assembled, the number of parts required to be assembled manually is small, the assembly of workers is convenient, the production efficiency is improved, the iron core and the shell are integrated, the rotor is matched with the rotor in the coaxial manner, the iron core is not required to be assembled manually for the second time, so that the concentricity tolerance of the stator iron core and the rotor is small, the motor assembly is effectively reduced, the accumulated tolerance is also effectively reduced, the vibration of the rotor is small when the motor rotates at a high speed, the noise when the motor is effectively reduced, meanwhile, the consistency of all parameters of the motor is ensured when the motor is produced in a batch manner, and the quality stability of the motor is greatly improved;

2. then, the coil windings are wound on the iron core, the rotor is arranged in the shell, and the iron core is matched with the rotor in the same axis, so that the rotor is not provided with the coil windings, when the rotor rotates at a high speed, the mass distribution of the rotor is very balanced, the circle runout of the rotor is smaller, the vibration noise generated when the motor runs at a high speed is effectively reduced, and the motor runs at a high speed more quietly;

3. finally, the locating slots with the same axle center are formed in the cavity openings at the two ends of the accommodating cavity of the shell, the two bearings are integrally arranged in the locating slots, the two ends of the main shaft of the rotor are arranged on the bearings, and glue is arranged at the locating slots and the positions of the bearings, so that the error of concentricity and coaxiality of the two bearings after being arranged is very small, the assembly error of the two bearings is effectively reduced, the rotor can smoothly rotate, the phenomenon of bearing clamping shaft cannot occur, the inner ring of the bearing can smoothly rotate, the rotor can smoothly rotate at a high speed, the noise of the clamping shaft cannot be generated, the bearing is fixed in the locating slots through the glue, the outer ring of the bearing is effectively fixed, the bearing cannot be damaged, the service life of the bearing is effectively prolonged, the practical function of the bearing is greatly met, the structure is simple, the practical use requirement of a user is greatly met, and the practicability is high.

Drawings

Fig. 1 is an isometric view of an embodiment of the utility model.

Fig. 2 is an exploded view of an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of an embodiment of the present utility model.

Fig. 4 is a schematic structural view of an iron core according to an embodiment of the present utility model.

Fig. 5 is a schematic view of the structure of the accommodating groove according to the embodiment of the present utility model.

Fig. 6 is a schematic structural view of the "C" shaped body according to the embodiment of the present utility model.

In the figure:

1. a housing; 2. an iron core; 3. a rotor; 4. a magnetically permeable bridge; 5. a coil winding; 6. a receiving chamber; 7. a positioning groove; 8. a bearing; 9. a receiving groove; 10. a "C" shaped body; 11. a mounting groove; 12. a storage groove; 13. a mosaic part; 14. and a wiring groove.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawings, but the utility model can be implemented in a number of different ways, which are defined and covered by the claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper end", "lower end", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Before working description of this embodiment, for convenience of understanding this embodiment, silicon steel is specifically described: silicon alloy steel containing 1.0 to 4.5% of silicon and less than 0.08% of carbon is called silicon steel. It has the characteristics of high magnetic permeability, low coercive force, large resistivity and the like, so that hysteresis loss and eddy current loss are small. The magnetic material is mainly used as a magnetic material in motors, transformers, electric appliances and electrical instruments.

As shown in fig. 1 to 6, the electric toothbrush motor with the integrated stator core provided in this embodiment includes a housing 1, at least one pair of iron cores 2, a rotor 3 and a magnetic conduction bridge 4, wherein the pair of iron cores 2 are integrally injection-molded and embedded on two sides of the housing 1, coil windings 5 are wound on the pair of iron cores 2, the rotor 3 is installed in the housing 1, the pair of iron cores 2 and the rotor 3 are coaxially matched, the magnetic conduction bridge 4 is installed on the housing 1, and the pair of iron cores 2 are mutually magnetically conducted and matched through the magnetic conduction bridge 4. Therefore, the coil winding 5 is embedded on the integrally formed iron core 2, and the magnetic field generated by the current passing through the lead of the coil winding 5 is directly concentrated on the iron core, so that the reluctance loss 2 is reduced, and the utilization rate of the magnetic field is effectively improved.

When the motor of this embodiment is assembled, only need install rotor 3 and magnetic bridge 4 on shell 1, the whole spare part that needs manual assembly is less, iron core 2 and shell 1 are integrative, and with rotor 3 coaxial adaptation, iron core 2 does not need artifical secondary equipment, so make the tolerance of concentricity of stator core 2 and rotor 3 less, also effectively reduce motor equipment and make the cumulative tolerance, therefore make rotor 3 vibration less when high-speed rotation, effectively reduce the noise when motor is operated, magnetic bridge 4 mutually magnetic conduction cooperation with a pair of iron cores 2, effectively prevent iron core 2 magnetic leakage, improve motor efficiency, simultaneously, guarantee the uniformity of each item parameter during motor mass production, greatly promote the stability of mass production motor's quality, and coil winding 5 winds on iron core 2, rotor 3 installs in shell 1, consequently, rotor 3 is last to have coil winding 5 with rotor 3 coaxial adaptation, when rotor 3 is rotatory at high-speed, the mass distribution of rotor 3 is very balanced, rotor 3 is less in the run-out, effectively reduce motor vibration noise when high-speed rotation is high-speed, and is more quiet when motor is operated at high-speed.

Further, the housing 1 of this embodiment is provided with the holding chamber 6 that runs through the housing 1, holds the accent department at chamber 6 both ends and all is provided with coaxial constant head tank 7, all installs bearing 8 in the constant head tank 7, and the both ends of the main shaft of rotor 3 insert to establish and install on bearing 8, and constant head tank 7 just is located bearing 8 department and is provided with glue. Therefore, the error of concentricity and coaxiality of the two bearings 8 after being installed is very small, the assembly error of the two bearings 8 is effectively reduced, the rotor 3 can smoothly rotate, the phenomenon that the bearings 8 are clamped is avoided, the inner ring of the bearing 8 can smoothly rotate, the rotor 3 can smoothly rotate at a high speed, the noise of the clamped shaft is avoided, the bearing 8 is fixed in the positioning groove 7 through glue, the outer ring of the bearing 8 is effectively fixed, the bearing 8 is not damaged, and the service life of the bearing 8 is effectively prolonged.

Further, the housing 1 of the present embodiment has two sides and is located at the coil winding 5 and provided with a receiving groove 9, one end of a pair of iron cores 2 is exposed at the receiving groove 9, the magnetic bridge 4 is aligned and fixed in the receiving groove 9, and two ends of the magnetic bridge 4 are attached to the iron cores 2 (as shown in fig. 1 and 5). The setting of utilizing holding tank 9 is convenient to install and fix the magnetic conduction bridge 4 on shell 1, and when coil winding 5 was circular telegram, iron core 2 produced electromagnetism, and the both ends and the laminating of iron core 2 of magnetic conduction bridge 4, consequently the magnetic conduction bridge 4 effectively leads to the effective magnetic conduction of the magnetic induction line that two iron cores 2 produced, prevents iron core 2 magnetic leakage, improves motor efficiency.

Further, the magnetic bridge 4 of this embodiment includes at least two "C" shaped bodies 10, the installation groove 11 is opened at the peripheral side of the housing 1 and at the coil winding 5, one end of the pair of iron cores 2 is exposed at the installation groove 11, the two "C" shaped bodies 10 overlap the installation groove 11 through their openings and form a fixed installation, the openings of the two "C" shaped bodies 10 are mutually attached, and the inner walls of the two "C" shaped bodies 10 are both attached to the iron cores 2 (as shown in fig. 6). Therefore, the two C-shaped bodies 10 are oppositely buckled on the shell 1, when the coil winding 5 is electrified, the iron core 2 generates electromagnetism, the two connected C-shaped bodies 10 effectively conduct magnetic induction lines generated by the iron cores 2 on two sides of the shell, the C-shaped bodies 10 can be of other shapes, the shape and structure of the magnetic conduction bridge 4 can be designed more flexibly, meanwhile, the iron core 2 is completely covered by the two C-shaped bodies 10, the influence of magnetic leakage of the iron core 2 is effectively reduced, and the motor efficiency is improved.

Further, the housing 1 of the present embodiment is provided with receiving grooves 12 on both sides of the iron core 2, the coil windings 5 are embedded in the receiving grooves 12, and one ends of the coil windings are exposed from the notches of the receiving grooves 12. Therefore, the coil winding 5 is installed and fixed in the accommodating groove 12 by the arrangement of the accommodating groove 12, and one end of the coil winding 5 is exposed out of the notch of the accommodating groove 12, so that the accommodating groove 12 does not completely cover the coil winding 5, the exposed coil winding 5 is beneficial to heat dissipation of the coil winding 5 when the coil winding 5 is electrified, and energy loss caused by heating of the coil winding 5 is effectively reduced.

Further, one end of the pair of cores 2 of the present embodiment is provided with a "C" shaped inlay portion 13. The shell 1 is manufactured by adopting a mold injection molding mode, so that the iron core 2 is embedded in the mold and integrally molded in the shell 1 when the shell 1 is molded by injection, and the embedded part 13 is in a C shape, so that the embedded part 13 can be completely coated in the shell 1 when the shell 1 is molded by injection, and the embedded iron core 2 is effectively prevented from falling off.

Further, the tail of the housing 1 of the present embodiment is provided with a wiring groove 14, and the wiring groove 14 communicates with the storage grooves 12 on both sides of the housing 1. The wiring groove 14 is used for embedding the lead wire led out or connected by the coil winding 5, so that the wiring groove 14 is utilized to facilitate the wiring of the lead wire of the coil winding 5, or the lead wire of the coil winding 5 is hidden in the wiring groove 14 and is not exposed when the lead wire or the lead wire is wired, and the surface of the shell 1 is neat and attractive.

Furthermore, the iron core 2 and the magnetic conduction bridge 4 in this embodiment are both made of silicon steel, and the silicon steel has the characteristics of good magnetic permeability, high coercivity, large resistivity and the like, so that hysteresis loss and eddy current loss are small, and the magnetic conduction bridge is very suitable for magnetic conduction of a motor.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. An electric toothbrush motor of integral type stator core, its characterized in that: the magnetic conduction bridge is arranged on the shell, and the pair of iron cores are matched with each other in a magnetic conduction mode through the magnetic conduction bridge.

2. An electric toothbrush motor of the integrated stator core as claimed in claim 1, wherein: the shell is provided with a containing cavity penetrating through the shell, locating grooves with the same axle center are formed in the mouth parts at two ends of the containing cavity, bearings are arranged in the locating grooves, two ends of a main shaft of the rotor are inserted and arranged on the bearings, and glue is arranged at the locating grooves and the positions, located at the bearings.

3. An electric toothbrush motor of the integrated stator core as claimed in claim 1, wherein: the two side surfaces of the shell are provided with accommodating grooves at the positions of the coil windings, one end of the iron core is exposed out of the accommodating grooves, the magnetic conduction bridge is aligned and fixed in the accommodating grooves, and two ends of the magnetic conduction bridge are attached to the iron core.

4. An electric toothbrush motor of the integrated stator core as claimed in claim 1, wherein: the magnetic bridge comprises at least two 'C' -shaped bodies, wherein the peripheral side surface of the shell is provided with a mounting groove at the position of the coil winding, one end of the iron core is exposed out of the mounting groove, the two 'C' -shaped bodies are lapped in the mounting groove through openings of the two 'C' -shaped bodies, fixed mounting is formed, the openings of the two 'C' -shaped bodies are mutually attached, and the inner walls of the two 'C' -shaped bodies are attached to the iron core.

5. An electric toothbrush motor of the integrated stator core as claimed in claim 1, wherein: the both sides of shell and be located iron core department and be provided with the storage tank, coil winding imbeds in the storage tank, and one end exposes in the notch of storage tank.

6. An electric toothbrush motor of the integrated stator core as claimed in claim 1, wherein: the shell afterbody is provided with the wiring groove, the wiring groove communicates the storage tank of shell both sides.

7. An electric toothbrush motor of the integrated stator core as claimed in claim 1, wherein: one end of the pair of iron cores is provided with a C-shaped embedded part.