CN211791096U

CN211791096U - Axial magnetic suspension sound wave motor device and electric toothbrush

Info

Publication number: CN211791096U
Application number: CN202020796447.5U
Authority: CN
Inventors: 邓斌; 黄明清; 卢勇生
Original assignee: Shenzhen Zhongda Motor Co ltd
Current assignee: Shenzhen Zhongda Motor Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-10-27
Anticipated expiration: 2030-05-13

Abstract

An axial magnetic suspension sound wave motor device and an electric toothbrush comprise a motor shell; the stator comprises a stator core fixedly arranged in the motor shell and coil windings wound on the stator core, the end face of the stator core is provided with at least two pairs of stator poles which are axially symmetrically distributed by taking the central axis of the motor shell as a symmetric axis, and each pair of stator poles on the stator core corresponds to one coil winding; the rotor includes near the separation blade that sets up in stator core's terminal surface the place ahead in motor housing, fixed set up on the separation blade with stator pole cooperation in order to form the at least two pairs of magnet steel of rotor pole to and fixed cover establish the motor shaft at separation blade center, the central axis coincidence of motor shaft place axis and motor housing. The utility model avoids the defect that the service life of the motor is short because the elastic structure is easy to damage when in use; the motor device is applied to the electric toothbrush, the size of the motor can be reduced as much as possible under the condition of reaching the rated torque, the weight of the electric toothbrush is reduced, and the user experience is improved.

Description

Axial magnetic suspension sound wave motor device and electric toothbrush

Technical Field

The utility model relates to the technical field of motors, concretely relates to axial magnetic suspension sound wave motor device and electric toothbrush.

Background

With the continuous improvement of the living standard of people, the electric toothbrush begins to enter the daily life of people, and replaces the traditional toothbrush to realize more ideal and more convenient tooth brushing effect.

The existing electric toothbrush is generally driven by a motor, and the function of cleaning teeth is achieved through the vibration of a toothbrush head. The motor of the existing electric toothbrush generally needs to be provided with a torsion bar of a spring or a similar torsion spring, and the structure is easy to damage and not easy to repair in the using process, so the service life of the motor is often determined by how long the structure can be used. And adopt above-mentioned structural design to make the bearing capacity of motor low, the moment of torsion that the motor of unit volume can transmit is less, and the swing amplitude change of motor shaft is great when bearing different loads moreover, and the result of use is also unstable.

In addition, the motors of existing electric toothbrushes are generally poor in compatibility, requiring a wide variety of motors to match different toothbrushes. However, people in various countries of various ages have different strength and feeling of brushing teeth, which is not favorable for standardization of the motor, and the limited capacity also brings great burden to enterprises and wastes national and enterprise resources. How to effectively solve the problem is also a technical problem which needs to be solved urgently by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the above-mentioned problem that prior art exists, provide an axial magnetic suspension sound wave motor device and electric toothbrush to solve the motor bearing capacity among the current electric toothbrush low, the short and compatible technical problem such as poor of life.

In order to achieve the above object, the utility model provides an axial magnetic suspension sound wave motor device, include:

a motor housing;

the stator comprises a stator core fixedly arranged in the motor shell and a coil winding wound on the stator core, the end face of the stator core is provided with at least two pairs of stator poles which are axially symmetrically distributed by taking the central axis of the motor shell as a symmetry axis, and each pair of stator poles on the stator core corresponds to one coil winding;

the rotor includes in be close to the setting in the motor housing the separation blade in terminal surface the place ahead of stator core, fixed the setting be in on the separation blade with stator pole cooperation is in order to form two pairs at least magnet steel of rotor pole to and fixed cover is established the motor shaft at separation blade center, motor shaft place axis with the coincidence of motor housing's the central axis.

As a further preferred technical scheme of the utility model, motor housing is last to be located the one end fixedly connected with plastic end cover of motor shaft syntropy, the outline of plastic end cover with motor housing's interior profile phase-match.

As a further preferred technical scheme of the utility model, follow on the plastic end cover motor housing's the central axis direction is equipped with the confession the motor shaft extends the outside shaft hole of motor housing, the shaft hole endotheca be equipped with motor shaft normal running fit's bearing.

As a further preferred technical scheme of the utility model, all magnet steels center on the shaft hole distributes on the separation blade, adjacent the magnet steel is in interval on the separation blade is the default, and at least two the default is different.

As a further preferred technical scheme of the utility model, all magnet steels center on the shaft hole distributes on the baffle, and at least one the magnet steel is with all the other the specification of magnet steel is different.

As a further preferred technical scheme of the utility model, the quantity of bearing is two, two the bearing sets gradually along the axial in shaft hole.

As a further preferred technical scheme of the utility model, be equipped with insulating line frame on the stator core, coil winding is around establishing on the insulating line frame to it is insulating between coil winding and the stator core.

As a further preferred technical scheme of the utility model, stator core is the U-shaped structure, the stator core of U-shaped structure have two with motor housing's the central axis is two U-shaped arms of axisymmetric distribution, every for the symmetry axis the top surface of U-shaped arm respectively is equipped with a pair of stator pole, and every the U-shaped arm corresponds a coil winding.

As a further preferred technical scheme of the utility model, the motor shaft includes two sections head and the tail order fixed connection's cascaded structure.

According to another aspect of the present invention, the present invention also provides an electric toothbrush, comprising any one of the above axial magnetic suspension sound wave motor device.

The motor device of the axial magnetic suspension sound wave motor device and the electric toothbrush of the utility model realizes the transmission of motion by means of electromagnetic effect, and elastic structures such as torsion bars are not needed to be installed, thus on one hand, the defect that the service life of the motor is short because the elastic structures are easy to damage when in use is avoided; on the other hand, the motor with unit volume can transmit larger value of torque; the motor device is applied to the electric toothbrush, the size of the motor can be reduced as much as possible under the condition of reaching the rated torque, the weight of the electric toothbrush is reduced, and the user experience is improved, so that the technical problems of low bearing capacity, short service life, poor compatibility and the like of the motor device in the electric toothbrush can be effectively solved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of an example provided by the axial magnetic levitation sound wave motor device of the present invention;

fig. 2 is a schematic front view of a stator core according to an embodiment of the present invention;

fig. 3 is a right-view structural schematic diagram of the stator core in fig. 2;

fig. 4 is a schematic structural view of a baffle according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a motor shaft according to an embodiment of the present invention.

In the figure: 1. motor shaft, 2, bearing, 3, plastic end cover, 4, shaft hole, 5, separation blade, 6, magnet steel, 7, stator core, 8, insulating bobbin, 9, coil winding, 10, motor housing.

The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for the sake of clarity only, and are not intended to limit the scope of the invention, its relative relationship between the terms and their derivatives, and the scope of the invention should be understood as being limited by the claims.

As shown in fig. 1 to 5, the utility model provides an axial magnetic suspension sound wave motor device, it includes motor housing 10, motor housing 10 and rotor, wherein:

the stator comprises a stator core 7 fixedly installed in the motor shell 10 and a coil winding 9 wound on the stator core 7, the end face of the stator core 7 is provided with at least two pairs of stator poles which are axially symmetrically distributed by taking the central axis of the motor shell 10 as a symmetry axis, each pair of stator poles on the stator core 7 corresponds to one coil winding 9, the stator core 7 is provided with an insulating wire frame 8, and the coil winding 9 is wound on the insulating wire frame 8 so as to insulate the coil winding 9 from the stator core 7;

the rotor includes in be close to the setting in motor housing 10 separation blade 5, the fixed setting in the terminal surface the place ahead of stator core 7 are in on the separation blade 5 with stator pole cooperation is in order to form two pairs at least magnet steel 6 of rotor pole to and fixed cover is established motor shaft 1 at separation blade 5 center, 1 place axis of motor shaft with the coincidence of the central axis of motor housing 10.

In the axial magnetic suspension acoustic wave motor device (hereinafter referred to as a motor device) provided by this embodiment, the coil winding 9 is energized to form a magnetic field at the end surface of the stator core 7, and the magnetic steel 6 is located in the magnetic field, so as to drive the magnetic steel 6 and drive the baffle 5 to rotate, and further drive the motor shaft 1 to rotate because the baffle 5 is fixedly connected with the motor shaft 1.

In practical application, the coil switches the current direction and controls the power-on time through an external circuit, so that the rotor generates left-right reciprocating swing. Rotor swing angle corresponds motor shaft 1's swing angle promptly, and it has two control positions, and the relative angle in 7 outsides of stator core is swung to the 6 outsides of magnet steel, and 6 inboard position swings of magnet steel are to central trench position, and motor device's moment of torsion can realize the adjustment of moment of torsion size through the clearance of adjusting magnet steel 6 and stator core 7 to satisfy different user demands.

Adopt above-mentioned structural design, rely on the electromagnetic effect to realize the transmission of motion, elastic construction such as torsion bar no longer need install, avoided elastic construction fragile when using to make the shorter condition of life of motor on the one hand, on the other hand makes the motor of unit volume can transmit the moment of torsion of bigger numerical value, then can reduce the volume of motor as far as possible under the condition that reaches rated torque, when this motor device is applied to electric toothbrush, can alleviate electric toothbrush's weight, improve user experience.

Meanwhile, the motor device provided by the embodiment transmits power through the electromagnetic structure, so that the power transmission process is more stable, the swing amplitude of the motor shaft 1 cannot be greatly changed when different loads are faced, and the use by a user is facilitated. And motor device's moment of torsion can realize the adjustment of moment of torsion size through the clearance of adjustment magnet steel 6 and stator core 7, and when this motor device was applied to electric toothbrush, can select to set up to children's mode according to the demand, torque modes such as adult's mode, special colony, and the range of application is wider, can realize standardizing, improve productivity and practice thrift the cost.

The motor comprises a motor shaft 1, a motor shell 10 and a motor cover 3, wherein the motor shell 10 is fixedly connected with one end, located in the same direction as the motor shaft 1, of the motor shell, and the outer contour of the plastic cover 3 is matched with the inner contour of the motor shell 10. Follow on the plastic end cover 3 the central axis direction of motor housing 10 is equipped with the confession motor shaft 1 extends the outside shaft hole 4 of

motor housing

10, 4 endotheca in shaft hole be equipped with 1 normal running fit's of motor shaft bearing 2, motor housing 10's one end is passed through plastic end cover 3 and is sealed, provides the support position for the rotor on the one hand, makes things convenient for the compact installation of rotor and stator, and the stable cooperation, on the other hand also can protect the pollution and the influence that receive external environment as few as possible of inside rotor and stator, guarantees that the rotor lasts stable power transmission.

In a specific implementation, the number of the bearings 2 is two, and the two bearings 2 are sequentially arranged along the axial direction of the shaft hole 4. The bearing 2 for the rotor hangs on plastic end cover 3 as the support, and relative stator constitutes the magnetic suspension motor structure, adopts the structure that bearing 2 supported for motor shaft 1's rotation is more smooth and easy, avoids motor shaft 1's wearing and tearing, also can stabilize motor shaft 1's position simultaneously, and simultaneously, both ends atress is more even around a pair of bearing 2 can make motor shaft 1, and the installation is stable.

In specific implementation, the stator core 7 is in a U-shaped structure, the stator core 7 in the U-shaped structure has two U-shaped arms that are axially symmetrically distributed with the central axis of the motor housing 10 as a symmetry axis, each of the top surfaces of the U-shaped arms is provided with a pair of stator poles, and each of the U-shaped arms corresponds to one coil winding 9.

In an embodiment, all magnet steels 6 are distributed on the blocking piece 5 around the shaft hole 4, the distance between adjacent magnet steels 6 on the blocking piece 5 is a preset value, and at least two preset values are different, namely, the magnet steels 6 are unevenly distributed on the blocking piece 5, so that the motor shaft 1 can be driven to generate certain vibration in the rotation process of the motor shaft, the vibration effect of the motor shaft 1 in use is optimized, and when the motor shaft is applied to an electric toothbrush, the cleaning capability of the electric toothbrush can be improved. Of course, the spacing values of the adjacent magnetic steels 6 on the baffle 5 can be different and arranged at will, or only two spacing values can be different, and how to select the spacing values can be flexibly selected according to actual needs.

In another embodiment, all magnet steel 6 surround shaft hole 4 distributes on separation blade 5, and at least one magnet steel 6 is different with other the specification of magnet steel 6, and magnet steel 6 has different specifications, and it is different that just also be equivalent to the 6 mounted position of magnet steel of same specification, can realize magnet steel 6 inhomogeneous distribution on separation blade 5 equally, plays aforementioned same technological effect, no longer specifically explains here.

In the concrete implementation, motor shaft 1 includes two sections head and the tail order fixed connection's cascaded structure for motor shaft 1's assembly is more convenient, and the matching degree of its appearance and all the other structures is better, can more effectual saving space, and cascaded structure makes things convenient for motor shaft 1's processing simultaneously, reduces the holistic technology of motor shaft 1 and makes the degree of difficulty.

Based on the axial magnetic suspension sound wave motor device that provides in the above-mentioned embodiment, the utility model also provides an electric toothbrush, it includes the motor device in any above-mentioned embodiment.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many changes and modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.

Claims

1. An axial magnetic levitation sound wave motor device, comprising:

a motor housing;

2. The axial magnetic levitation acoustic wave motor device as claimed in claim 1, wherein a plastic end cap is fixedly connected to one end of the motor housing in the same direction as the motor shaft, and the outer contour of the plastic end cap matches the inner contour of the motor housing.

3. The axial magnetic levitation acoustic wave motor device as claimed in claim 2, wherein the plastic end cap is provided with a shaft hole along the central axis of the motor housing for the motor shaft to extend out of the motor housing, and the shaft hole is sleeved with a bearing rotatably engaged with the motor shaft.

4. The axial magnetic levitation acoustic wave motor device as claimed in claim 3, wherein all the magnetic steels are distributed on the baffle around the shaft hole, the distance between adjacent magnetic steels on the baffle is a preset value, and at least two preset values are different.

5. The axial magnetic levitation acoustic wave motor apparatus as recited in claim 3, wherein all the magnetic steels are distributed on the baffle around the shaft hole, and at least one of the magnetic steels is different from the rest of the magnetic steels in specification.

6. The axial magnetic levitation acoustic wave motor device as claimed in claim 4 or 5, wherein the number of the bearings is two, and the two bearings are arranged in sequence along the axial direction of the shaft hole.

7. The axial magnetic levitation acoustic wave motor apparatus as recited in claim 1, wherein the stator core is provided with an insulating bobbin, and the coil winding is wound around the insulating bobbin to insulate the coil winding from the stator core.

8. The axial magnetic levitation acoustic wave motor device as claimed in claim 7, wherein the stator core is U-shaped, the U-shaped stator core has two U-shaped arms axially symmetrically distributed around the central axis of the motor housing, the top surface of each U-shaped arm is provided with a pair of stator poles, and each U-shaped arm corresponds to one coil winding.

9. The axial magnetic levitation acoustic wave motor device as recited in claim 8, wherein the motor shaft comprises two stepped structures fixedly connected end to end in sequence.

10. An electric toothbrush comprising an axial magnetically levitated acoustic motor apparatus as claimed in any one of claims 1 to 9.