CN109698564B - A High Frequency Fixed Angle Motor - Google Patents

Abstract

The application relates to the technical field of motors, in particular to a high-frequency fixed angle motor, which comprises a motor shell, and a rotor component and a stator component which are respectively arranged in the motor shell; the rotor assembly is arranged between the stator assemblies, and the high-frequency fixed angle motor further comprises a first permanent magnet and a limiting magnetic assembly; the limiting magnetic assembly is fixedly arranged in the motor shell and positioned at one side of the rotor assembly, and comprises two second permanent magnets which are symmetrically arranged; the first permanent magnet is fixedly arranged on the rotor assembly and is positioned between the two second permanent magnets; the magnetic poles of the first permanent magnet and the two second permanent magnets repel each other, and when the high-frequency fixed angle motor works, the rotor assembly rotates reciprocally within a set angle range; the first permanent magnet and the limiting magnetic assembly limit and reset the rotor assembly, so that the structure is more stable, the service life is long, and the noise is low.

Description

A High Frequency Fixed Angle Motor

technical field

The invention relates to the technical field of motors, in particular to a high-frequency fixed-angle motor.

Background technique

Electric toothbrush is a new product that has appeared in recent years, and it has set off a revolution in the field of oral health care abroad. Though electric toothbrush is not still popularized in the application of my country, existing people's prediction, it will become the important a member in the popular health product. Surveys show that electric toothbrushes are more scientific and effective than ordinary toothbrushes. Can more thoroughly remove dental plaque, reduce gingivitis and gingival hemorrhage, also be the generally popular daily necessities of present European and American many countries. The electric toothbrush rotates quickly to generate high-frequency vibrations on the brush head, instantly decomposing the toothpaste into fine foam, and deeply cleans the gaps between the teeth; at the same time, the vibration of the bristles can promote blood circulation in the oral cavity and have an unexpected massage effect on the gum tissue .

In principle, there are two types of electric toothbrushes: rotation and vibration. The principle of rotary toothbrushes is simple, that is, the motor drives the round brush head to rotate, which enhances the friction effect while performing ordinary brushing actions. Vibrating toothbrushes are more complex and higher-end in terms of price. There is an electric-driven vibration motor inside the vibration type toothbrush, which can make the brush head produce high-frequency oscillation perpendicular to the direction of the brush handle, but the amplitude of the oscillation is very small, generally about 5 mm. When brushing your teeth, on the one hand, the high-frequency oscillating brush head can efficiently clean your teeth. On the other hand, the vibration of more than 20,000 times per minute also makes the mixture of toothpaste and water in the mouth produce a large number of tiny bubbles. The pressure can penetrate deep into the teeth to clean the dirt.

Existing toothbrush motors mostly use springs or other elastic parts to limit and reset the rotor in the motor. After the toothbrush motor continues to run for a period of time, the surface of the spring is oxidized by moisture, resulting in reduced torque, irregular swing, and increased noise. Large or shutdown phenomenon, short service life, so this application proposes an improvement scheme for the above problems.

Contents of the invention

The purpose of the present invention is to provide a vibration motor that uses the principle of repulsion of magnetic poles to limit the rotation angle.

To achieve the above object, the present invention provides the following technical solutions:

A high-frequency fixed-angle motor, comprising a motor casing, and a rotor assembly and a stator assembly respectively arranged in the motor casing; the rotor assembly is arranged between the stator assemblies, and the high-frequency fixed-angle motor also includes A first permanent magnet and a limit magnetic assembly; the limit magnetic assembly is fixedly arranged in the motor casing and is located on one side of the rotor assembly, and the limit magnetic assembly includes two second permanent magnets arranged symmetrically; The first permanent magnet is fixed on the rotor assembly and is located between the two second permanent magnets; the poles of the first permanent magnet and the two second permanent magnets repel each other, and the high-frequency fixed When the angle motor works, the rotor assembly is made to reciprocate within a set angle range.

Preferably, the rotor assembly includes a rotating shaft, an iron core provided with windings, and a mounting piece; the rotating shaft is rotatably connected to the motor casing, the mounting piece is fixedly connected to the rotating shaft, and the iron core is fixedly connected to On the mounting part, the first permanent magnet is fixed on the mounting part.

Preferably, the motor casing includes a base and an upper shell covering the base; a rotating space is provided on the base, the first permanent magnet is arranged in the rotating space, and the second permanent magnet is fixed set on the base.

Preferably, a limit sleeve is provided on the rotating shaft.

Preferably, elastic washers are also provided on the rotating shaft.

Preferably, the rotation angle range of the rotating shaft is between -30° and +30°.

Preferably, both the first permanent magnet and the second permanent magnet are magnetic steel.

Compared with prior art, the beneficial effect of the present invention is:

1. Instead of the spring motor in the prior art, the rotor assembly is limited and reset by the first permanent magnet and the limiting magnetic assembly, which has a more stable structure, long service life and low noise;

2. By increasing the volume of the first permanent magnet, the received magnetic force is increased, the magnetic field is efficiently utilized, the range of motion of the rotor assembly is adjusted, and the torque of the high-frequency fixed-angle motor is enhanced at the same time;

3. Add the limit sleeve and the elastic gasket to optimize the space structure in the high-frequency fixed-angle motor and reduce the gap between the parts on the rotating shaft, thereby reducing the high-frequency fixed angle motor. Noise generated when the angle motor is in operation.

Description of drawings

Fig. 1 is the exploded structural diagram of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is the sectional view of A-A in Fig. 2;

Fig. 4 is the sectional view of B-B in Fig. 2;

Fig. 5 is the sectional view of C-C in Fig. 2;

Fig. 6 is a structural schematic diagram of the base in the present invention;

Fig. 7 is a test data table of the present invention.

In the figure: 1-motor casing; 2-rotor assembly; 3-stator assembly; 4-first permanent magnet; 5-limiting magnetic assembly; 10-base; -iron core; 23-installation piece; 30-magnetic tile; 50-second permanent magnet; 100-rotating space; 200-installation space; 201-limiting sleeve; 202-elastic gasket.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that when an element is referred to as being “fixed” to another element, it may be directly on the other element or an intervening element may also exist. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

A high-frequency fixed-angle motor is applied to an electric toothbrush to drive the brush head on the electric toothbrush to reciprocate. The rotor assembly 2 and the stator assembly 3 in the motor casing 1; the rotor assembly 2 is arranged between the stator assemblies 3; the high-frequency fixed-angle motor also includes a first permanent magnet 4 and a limit magnetic assembly 5; The limit magnetic assembly 5 is fixedly arranged in the motor housing 1 and is located on one side of the rotor assembly 2, the limit magnetic assembly 5 includes two second permanent magnets 50 arranged symmetrically; The magnet 4 is fixed on the rotor assembly 2 and is located between the two second permanent magnets 50; a magnetic field A is formed between the two second permanent magnets 50, and the first permanent magnet 4 and the two first permanent magnets The magnetic poles of the two permanent magnets 50 repel each other, and when the high-frequency fixed-angle motor is working, the rotor assembly 2 is reciprocally rotated within a set angle range.

In this embodiment, two first permanent magnets 4 and two position-limiting magnetic assemblies 5 are provided, and the two position-limiting magnetic assemblies 5 are arranged symmetrically, so that the rotation of the rotor assembly 2 is more stable.

Specifically, the motor casing 1 includes a base 10 and an upper shell 11 covering the base 10; the base 10 is provided with a rotating space 100, and the two sides of the rotating space 100 are provided with installation spaces 200, so The installation space 200 communicates with the rotation space 100 .

Specifically, the stator assembly 3 includes two magnetic tiles 30 , which are symmetrically arranged and fixed on the inner side wall of the upper shell 11 , and a magnetic field B is formed between the two magnetic tiles 30 .

Specifically, the rotor assembly 2 includes a rotating shaft 20 , an iron core 22 provided with a winding 21 , and a mounting part 23 .

One end of the rotating shaft 20 is rotatably arranged on the base 10 , the other end of the rotating shaft 20 is rotatably arranged on the upper shell 11 , and the connection between the rotating shaft 20 and the base 10 and the upper shell 11 Bearings are respectively provided to make the rotating shaft 20 rotate smoothly.

The mounting part 23 is fixedly connected with the rotating shaft 20, and one end of the mounting part 23 is connected with the iron core 22, and the iron core 22 is located between the two magnetic tiles 30; the mounting part 23 The other end extends into the rotating space 100, the second permanent magnets 50 are respectively fixed in the installation space 200, the first permanent magnets 4 are fixed on the mounting part 23 and are located in two places. between the second permanent magnets 20; the magnetic poles of the first permanent magnet 4 and the second permanent magnet 50 are arranged according to the same magnetic poles, for example, one end of the first permanent magnet 4 is an N pole , the other end of the first permanent magnet 4 is the S pole, and the N pole of the second permanent magnet 20 is towards the N pole of the first permanent magnet 4, and the other second permanent magnet 20 is The S pole of the first permanent magnet 4 is directed towards the S pole of the first permanent magnet 4 .

When working, the winding 21 is energized, and the iron core 22 drives the rotating shaft 20 to rotate through the mounting part 23. When the rotation angle gradually increases, the first permanent magnet 4 is getting closer and closer to the second permanent magnet 4. One of the permanent magnets 50, according to the principle of magnet homopolar mutual repulsion, the final force between the first permanent magnet 4 and the second permanent magnet 50 is equal to the torque of the rotating shaft 20, and the rotating shaft 20 stop the rotation, thus, the limiting magnetic assembly 5 achieves the limiting effect on the rotating shaft 20; the winding 21 passes a current in the opposite direction, and the winding 21 is subjected to a force in the opposite direction in the magnetic field B, The iron core 22 drives the rotating shaft 20 to rotate in the opposite direction through the mounting part 23, and the first permanent magnet 4 gets closer to the other one of the second permanent magnets 50 until the first permanent magnet 4 The acting force between the magnet 4 and the second permanent magnet 50 is equal to the torque of the rotating shaft 20 , and the rotating shaft stops rotating, thereby realizing the reciprocating rotation of the rotating shaft 20 .

Specifically, the rotating shaft 20 is provided with a limiting sleeve 201 and an elastic washer 202; one end of the elastic washer 202 is in contact with the inner side wall of the upper shell 11, and the other end of the elastic washer 202 is in contact with the inner side wall of the upper shell 11. One end of the limiting sleeve 201 abuts, and the other end of the limiting sleeve 201 abuts against the iron core 22; the limiting sleeve 201 and the elastic gasket 202 are arranged to optimize the The space structure in the high-frequency fixed-angle motor reduces the gap between the components arranged on the rotating shaft 20, thereby reducing the noise generated when the high-frequency fixed-angle motor is working.

Specifically, the rotation angle range of the rotating shaft 20 is between -30° to +30°; the applicant's experimental test shows that the rotating shaft 20 rotates within the above range, and the electric toothbrush is most comfortable to use.

Specifically, both the first permanent magnet 4 and the second permanent magnet 50 are magnetic steel, which are resistant to high temperature.

As shown in Figure 7, in this embodiment, by inputting a energization frequency of 100 times per second to the high-frequency fixed-angle motor, after the high-frequency fixed-angle motor runs for 50 hours, a pressure load of 200g is added to detect the high-frequency fixed-angle motor. Working torsion and noise of angle, obtain test data; Under the same condition, described high-frequency fixed-angle motor compares with the spring motor in the prior art, draws described high-frequency fixed-angle motor, swing angle is the largest, noise Minimum, maximum service life.

Beneficial effect:

(1) Instead of the spring motor in the prior art, the rotor assembly 2 is limited and reset by the first permanent magnet 4 and the limit magnetic assembly 5, which has a more stable structure, long service life and low noise ;

(2) By increasing the volume of the first permanent magnet 4, the received magnetic force is increased, the magnetic field is efficiently utilized, the range of motion of the rotor assembly 2 is adjusted, and the torque of the high-frequency fixed-angle motor is enhanced;

(3) Add the limit sleeve 201 and the elastic gasket 202 to optimize the space structure in the high-frequency fixed-angle motor and reduce the gap between the parts on the rotating shaft 20, thereby reducing the The noise generated when the high-frequency fixed-angle motor is working

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. A high-frequency fixed-angle motor, comprising a motor casing (1), and a rotor assembly (2) and a stator assembly (3) respectively arranged in the motor casing (1); the rotor assembly (2) is set Between the stator components (3), it is characterized in that the high-frequency fixed-angle motor also includes a first permanent magnet (4) and a limit magnetic component (5); the limit magnetic component (5) is fixed Located in the motor casing (1) and on one side of the rotor assembly (2), the limit magnetic assembly (5) includes two second permanent magnets (50) symmetrically arranged; the first permanent magnet The magnet (4) is fixed on the rotor assembly (2) and is located between the two second permanent magnets (50); the first permanent magnet (4) and the two second permanent magnets (50) The magnetic poles repel each other, and when the high-frequency fixed-angle motor is working, the rotor assembly (2) is reciprocally rotated within a set angle range. 2. The high-frequency fixed-angle motor according to claim 1, characterized in that, the rotor assembly (2) includes a rotating shaft (20), an iron core (22) provided with windings (21), and a mounting piece (23 ); the rotating shaft (20) is rotationally connected to the motor housing (2), the mounting part (23) is fixedly connected to the rotating shaft (20), and the iron core (22) is fixedly connected to the mounting part (23), the first permanent magnet (4) is fixed on the mounting part (23). 3. The high-frequency fixed-angle motor according to claim 2, characterized in that, the motor housing (1) includes a base (10) and an upper shell (11) covering the base (10); the The base (10) is provided with a rotation space (100), the first permanent magnet (4) is arranged in the rotation space (100), and the second permanent magnet (50) is fixed on the base (10) )superior. 4. The high-frequency fixed-angle motor according to claim 2, characterized in that, a limit sleeve (201) is provided on the rotating shaft (20). 5. The high-frequency fixed-angle motor according to claim 4, characterized in that an elastic washer (202) is further provided on the rotating shaft (20). 6. The high-frequency fixed-angle motor according to any one of claims 2 to 5, characterized in that, the rotation angle range of the rotating shaft (20) is between -30° and +30°. 7. The high-frequency fixed-angle motor according to any one of claims 1 to 5, characterized in that, the first permanent magnet (4) and the second permanent magnet (50) are both magnetic steel.