CN209860769U

CN209860769U - Brushless electric toothbrush motor

Info

Publication number: CN209860769U
Application number: CN201920848670.7U
Authority: CN
Inventors: 邓斌
Original assignee: Shenzhen Zhongda Motor Co Ltd
Current assignee: Shenzhen Zhongda Motor Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2019-12-27
Anticipated expiration: 2029-06-04

Abstract

A brushless electric toothbrush motor comprises a stator and a rotor, wherein the rotor comprises a motor shaft, a rotor iron core and four pieces of magnetic steel, the motor shaft is connected to a central shaft hole of the rotor iron core in an interference fit mode, and the four pieces of magnetic steel are uniformly self-adhered to the periphery of the rotor iron core in an N-N-S-S polarity sequence; the stator includes front end line frame, rear end line frame and stator core, and front end line frame and rear end line frame are connected respectively at stator core's both ends, and stator core inner wall symmetry is equipped with two bellied wire casings of cusp, and the coiling has the coil winding in the wire casing between front end line frame and the rear end line frame, and the coil winding is insulating with stator core, the utility model discloses a brushless electric toothbrush motor, magnet steel are arranged with NNSS's polarity order, and the general NSNS of unconventional motor is arranged, so can control the position of magnet steel effectively, and accomplish maximum promotion to the control of rotor horizontal hunting angle, can make application products such as electric toothbrush obtain better result of use.

Description

Brushless electric toothbrush motor

Technical Field

The utility model relates to a toothbrush technical field, concretely relates to brushless electric toothbrush motor.

Background

The electric toothbrush has the working principle that the motor is mainly adopted to drive so as to realize the frequent vibration of the toothbrush head, thereby achieving the purpose of cleaning teeth.

The existing motors for electric toothbrushes are generally conventional motors and have the following disadvantages: firstly, a blocking piece structure is adopted in the machine body to prevent the shaft from rotating 360 degrees, specifically, a regular iron piece is attached to the rotor chip by glue and spans two sides of the wire frame made of plastic materials to block the rotor from rotating 360 degrees. However, this structure causes a great hidden trouble because the motor requires a long service life, the baffle is fixed by glue and has a small bonding area, there is a hidden trouble of falling off, the longer the time, the larger the hidden trouble is, and after the baffle collides with the wire frame made of plastic material for a long time, the wire frame deforms, the baffle is more likely to fall off, and unnecessary noise is generated by collision. Second, there is the hidden danger of droing in the magnet steel bonding, inside magnet steel divide into four single-chip magnet steel, magnetism is the high magnetic field performance, and N, S utmost point divides the limit to arrange, so there is considerable repulsion when homopolar magnet steel is near on one side, and the magnet steel then leans on glue to adhere to on the rotor chip, if the not good its repulsion of bonding effect lets it drop probably, and the rotor chip outer wall just around of iron core chip inner wall, the magnet steel is being in the intermediate position, the iron core chip is also producing the adsorption affinity to the magnet steel simultaneously, just so very easily cause the hidden danger that the magnet steel drops.

The above two defects result in that the conventional motor cannot control the left-right swing angle of the rotor, so that the product performance cannot be well positioned and evaluated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve the above-mentioned problem that prior art exists, provide a brushless electric toothbrush motor.

In order to achieve the above object, the present invention provides a brushless electric toothbrush motor, comprising a stator and a rotor, wherein:

the rotor comprises a motor shaft, a rotor iron core and four pieces of magnetic steel, the motor shaft is connected to a central shaft hole of the rotor iron core in a penetrating mode in an interference fit mode, and the four pieces of magnetic steel are evenly self-adsorbed on the periphery of the rotor iron core in an N-N-S-S polarity sequence;

the stator comprises a front-end wire frame, a rear-end wire frame and a stator core, wherein the front-end wire frame and the rear-end wire frame are respectively connected to two ends of the stator core, two tooth-shaped raised wire grooves are symmetrically formed in the inner wall of the stator core, a coil winding is wound in each wire groove between the front-end wire frame and the rear-end wire frame, and the coil winding is insulated from the stator core;

the rotor is followed pass between the stator core of stator, the front end of wire casing is the intrados that has fan-shaped structure, the centre of intrados is to the middle hole site that the inner wall recess formed, stator core with the magnet steel cooperation is so that the rotor in the stator around the axle center horizontal hunting of motor shaft.

As a further preferred technical scheme of the utility model, the motor still includes the casing and connects the end cover of casing front end, the stator sets up by the casing with in the machine chamber that the end cover formed, the front end line frame is connected with the end cover, the rear end line frame is connected with the rear end tip of casing.

As a further preferred technical scheme of the utility model, the both ends that lie in rotor core on the motor shaft are connected with ball bearing respectively, the front end line frame with rear end line frame symmetry is equipped with the bearing room that bears ball bearing.

As a further preferred technical scheme of the utility model, the motor shaft is the syllogic axle.

As a further preferred technical scheme of the utility model, the center of end cover is equipped with the quad slit, the syllogic axle extends and follows the quad slit is worn out, the syllogic epaxial with the region that the quad slit corresponds is equipped with can swing and flat position that can not 360 degrees rotations in the quad slit.

The utility model discloses a brushless electric toothbrush motor, it compares with current conventional motor that is used for electric toothbrush, has following advantage:

1) the magnetic steel is arranged in the polarity sequence of N-N-S-S instead of the general NSNS arrangement of the conventional motor, so that the position of the magnetic steel is more effectively controlled;

2) the relative angle between the rotor core and the magnetic steel ensures that four pieces of magnetic steel on the rotor are uniformly self-absorbed on the periphery of the rotor core;

3) the preset size of the middle hole position of the stator core can control the time of the rotor swinging left and right, and ensure that the rotor always swings within a controlled angle (10 degrees for each left and right), so that the rotor can not return to the original position after swinging left and right;

4) the control of the left-right swing angle of the rotor is improved to the maximum extent, and application products such as an electric toothbrush and the like can obtain better using effects.

Drawings

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

Fig. 1 is an exploded schematic view of an example of the motor of the present invention;

fig. 2 is a partial cross-sectional schematic view of a motor.

In the figure: 1. the motor comprises a shell, 2, a front-end coil frame, 3, a ball bearing, 4, a middle hole position, 5, a stator core, 6, a coil winding, 7, a rear-end coil frame, 8, an end cover, 9, magnetic steel, 10, a rotor core, 11 and a motor shaft.

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 and 2, the brushless electric toothbrush motor includes a stator and a rotor, wherein:

the rotor comprises a motor shaft 11, a rotor iron core 10 and four pieces of magnetic steel 9, the motor shaft 11 is connected on a central shaft hole of the rotor iron core 10 in an interference fit mode, and the four pieces of magnetic steel 9 are uniformly self-adhered to the periphery of the rotor iron core 10 in the N-N-S-S polarity sequence;

the stator comprises a front-end wire frame 2, a rear-end wire frame 7 and a stator core 5, wherein the front-end wire frame 2 and the rear-end wire frame 7 are respectively connected to two ends of the stator core, wire grooves with two dentate bulges are symmetrically arranged on the inner wall of the stator core 5, a coil winding 6 is wound in each wire groove between the front-end wire frame 2 and the rear-end wire frame 7, and the coil winding 6 is insulated from the stator core 5;

the rotor passes through the stator iron cores 5 of the stator, the front end of the wire casing is an inner arc surface with a fan-shaped structure, the center of the inner arc surface is a middle hole position 4 formed by sinking towards the inner wall, and the stator iron cores 5 are matched with the magnetic steel 9 to enable the rotor to swing left and right in the stator around the axis of the motor shaft 11.

Specifically, the motor of the embodiment plays a role of vibration rather than rotation, so that the two-pole magnetic steel 9 is adopted and is arranged in the polarity sequence of N-N-S-S to form a magnetic suspension principle, and the motor shaft 11 swings left and right quickly to output work. The middle hole site 4 of stator core 5 plays the effect of control rotor swing angle and returning to the primary importance, because when the rotor swung to middle hole site 4 positions, middle hole site 4 department lacked the interact with magnet steel 9, can be because of lacking the power after will reverse direction operation, vice versa to the angle of horizontal hunting has been controlled.

The magnetic steel 9 is arranged on the rotor core 10 in an adsorption mode, and due to the fact that the homopolar poles are far away from each other, the heteropolar poles are close to each other, and the middle of the homopolar poles are located at the position far away from the stator core 5, the working principle that the homopolar poles repel each other and the heteropolar poles attract each other is better embodied, and therefore the rotor is effectively controlled to swing left and right and cannot rotate 360 degrees.

Keep away from between the homopolar, be close to between the heteropolar for repulsion decay, suction reinforcing makes this fixed position of keeping of four pieces of magnet steel 9 self-priming, keeps the adsorption affinity simultaneously. More have the outstanding, this kind of setting just in time does not need external auxiliary function, and magnet steel 9 can be natural keeping mutual position, just so just need not bond on rotor core 10 through glue with magnet steel 9, through the magnetic suspension effect for give the rotor horizontal hunting angle and brought stability, when the outage stopped simultaneously, the effort makes the rotor keep the home position forever.

In specific implementation, the motor further comprises a shell 1 and an end cover 8 connected to the front end of the shell 1, the stator is arranged in a machine cavity formed by the shell 1 and the end cover 8, the front end wire frame 2 is connected with the end cover 8, and the rear end wire frame is connected with the rear end part of the shell 1.

In specific implementation, ball bearings 3 are respectively connected to two ends of the rotor core 10 on the motor shaft 11, and bearing chambers for bearing the ball bearings 3 are symmetrically arranged on the front end wire frame 2 and the rear end wire frame 7.

In the concrete implementation, motor shaft 11 is the syllogic axle, and the center of end cover 8 is equipped with the quad slit, and the syllogic axle extends and wears out from the quad slit, and the epaxial region that corresponds with the quad slit of syllogic is equipped with can swing in the quad slit and can not 360 degrees rotatory flat positions, has adopted the setting of 8 square holes of end cover, and the unconventional washer that bonds on the rotor to there is the problem of hidden danger in the conventional motor of having solved.

The utility model also provides an electric toothbrush, including any one of the above-mentioned embodiments the motor, because its motor can accomplish the promotion of maximum to the control of rotor horizontal hunting angle, alright make the electric toothbrush product obtain better result of use like this.

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. A brushless electric toothbrush motor comprising a stator and a rotor, wherein:

2. The brushless electric toothbrush motor of claim 1, further comprising a housing and an end cap attached to a front end of the housing, the stator being disposed in a housing cavity formed by the housing and the end cap, the front end bobbin being attached to the end cap, and the rear end bobbin being attached to a rear end of the housing.

3. The brushless electric toothbrush motor of claim 2, wherein ball bearings are respectively connected to both ends of the motor shaft located at the rotor core, and the front and rear bobbins are symmetrically provided with bearing chambers for carrying the ball bearings.

4. A brushless electric toothbrush motor as claimed in claim 2 or 3, wherein the motor shaft is a three-section shaft.

5. The brushless electric toothbrush motor of claim 4, wherein the end cap has a square hole in the center thereof, the three-piece shaft extends through the square hole, and a region of the three-piece shaft corresponding to the square hole has a flat position capable of swinging in the square hole without rotating 360 degrees.