CN111541312A

CN111541312A - Bidirectional magnetic suspension sound wave motor device

Info

Publication number: CN111541312A
Application number: CN202010525655.6A
Authority: CN
Inventors: 罗东胜; 晏木
Original assignee: Kerui Technology Dongguan Co ltd
Current assignee: Kerui Technology Dongguan Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-08-14
Also published as: WO2021249470A1

Abstract

The invention discloses a bidirectional magnetic suspension sound wave motor device which comprises a motor shell and a motor shaft branch, wherein the motor shaft branch is arranged at the axle center of the motor shell, an end cover is arranged at the bottom end of the motor shell, axle holes are formed in the axle centers of the motor shell and the end cover, and the motor shaft branch penetrates through the two axle holes. According to the invention, the transmission of motion is realized by depending on the electromagnetic effect, and elastic structures such as a torsion bar and the like are not required to be installed, so that the condition that the service life of the motor is short due to the fact that the elastic structures are easy to damage in use is avoided, and the motor in unit volume can transmit torque with a larger numerical value.

Description

Bidirectional magnetic suspension sound wave motor device

Technical Field

The invention relates to the technical field of motors, in particular to a bidirectional magnetic suspension sound wave motor device.

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 motion tracks of the existing electric toothbrush generally swing left and right in a radial direction, and the existing electric toothbrush does not have an axial telescopic function, but people brush teeth in daily life, and not only need to swing up and down to clean teeth (swing in the radial direction), but also need to move left and right (stretch in the axial direction) to achieve the aim of all-around cleaning, so that how to effectively solve the problem is always a problem that needs to be broken through by technical personnel in the field.

Therefore, it is necessary to invent a bidirectional magnetic suspension acoustic wave motor device to solve the above problems.

Disclosure of Invention

The invention aims to provide a bidirectional magnetic suspension sound wave motor device which comprises a motor shell and a motor shaft branch, wherein the motor shaft branch is arranged at the axle center of the motor shell, an end cover is arranged at the bottom end of the motor shell, axle holes are formed in the axle centers of the motor shell and the end cover, the motor shaft branch penetrates through the two axle holes, a bearing is arranged at the joint of the motor shaft branch and the axle holes, a transmission unit is arranged in the motor shell, the transmission unit consists of a stator component and a rotor component, and the rotor component is arranged in the stator component;

the stator assembly comprises a stator core and coil windings, insulating wire frames are arranged on two sides of the stator core, stator teeth are arranged at two ends of the inner side of the stator core, pole shoes are fixedly connected to one sides of the stator teeth, which are far away from the stator core, the pole shoes are matched with the rotor assembly, the coil windings are wound on two sides of the stator core, and two ends of the coil windings are wound on the insulating wire frames;

the rotor subassembly includes rotor core and magnet steel, rotor core folds and presses the setting in the motor shaft branch outside, four standing grooves have been seted up on rotor core outside surface, four the standing groove is about rotor core bisector symmetric distribution, and the interval angle inequality between a standing groove and its both sides standing groove, four all be equipped with the magnet steel in the standing groove, four the magnet steel highly staggered distribution, the magnet steel has formed from the face of inhaling with stator core and the non-face of inhaling, and is greater than the non-face area of inhaling from the face area of inhaling.

Preferably, the number of the transmission units is set to be one or more, a rotor framework is arranged between two adjacent rotor cores, and the two adjacent rotor cores are connected through the rotor framework.

Preferably, the clamping grooves are formed in the two ends of the rotor framework and matched with the cross section of the rotor core, and the clamping grooves are connected with the rotor core in a buckled mode.

Preferably, the cross section of the motor shell is flat or circular, the end cover and the stator core are matched with the inner contour of the motor shell, and the end cover is connected with the motor shell in a riveting mode.

Preferably, the coil winding is matched with the stator teeth, each group of the coil winding is provided with a coil I, a coil II, a coil III and a coil IV respectively, the head of the coil I is connected with the tail of the coil II, the head of the coil III is connected with the tail of the coil IV, the head of the coil II is electrically connected with the head of the coil IV and is led out, and the tail of the coil I is connected with the tail of the coil III and is led out.

Preferably, the four coil windings are divided into two groups, the two groups of coil windings are respectively provided with an upper winding, a lower winding and a left winding and a right winding, the magnetic fields of the upper winding and the lower winding are the same after being electrified, and the magnetic fields of the left winding and the right winding are opposite after being electrified.

Preferably, four the magnet steel divide into two sets ofly, and two magnet steel opposite polarity in every group, the magnetic pole correspondence is the same about two sets of magnet steel.

Preferably, one end of the motor shaft branch extends out of one side of the motor shell.

In the technical scheme, the invention provides the following technical effects and advantages:

through the transmission that relies on electromagnetic effect to realize the motion, elastic structure such as torsion bar no longer need to install, on the one hand, avoided elastic structure fragile when using to make the shorter condition of life of motor, on the other hand makes the motor of unit volume can transmit the moment of torsion of bigger numerical value, when the device is applied to electric toothbrush, can alleviate electric toothbrush's weight, the impression of brushing teeth among the daily life is more pressed close to the up-and-down concertina movement in the horizontal hunting, the cleaning action promotes greatly, transmit power through electromagnetic structure, make the power transmission process more stable, the amplitude of oscillation of motor shaft branch can not produce great change when the face is to different loads, convenience of customers uses, compared with prior art, can brush teeth with axial and radial rotation simultaneously, the blank that electric toothbrush does not have axial concertina movement except radial horizontal hunting on the market has been filled.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is an exploded view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a view showing A-A in FIG. 3 according to the present invention^，A schematic cross-sectional structure;

FIG. 5 is a right side view of the present invention;

FIG. 6 is a drawing showing B-B in FIG. 5 according to the present invention^，A schematic cross-sectional structure;

FIG. 7 is a schematic view of a rotor core structure according to the present invention;

fig. 8 is a schematic view of a coil winding connection structure in a stator core according to the present invention;

FIG. 9 is a schematic diagram of the distribution structure of the self-priming surface and the non-self-priming surface according to the present invention;

FIG. 10 is a view of the invention taken from C-C in FIG. 9^，A schematic cross-sectional structure;

FIG. 11 is a schematic view of a magnetic steel polarity distribution structure according to the present invention;

FIG. 12 is a view showing D-D in FIG. 11 according to the present invention^，A schematic cross-sectional structure;

FIG. 13 is a drawing showing E-E in FIG. 11 according to the present invention^，A schematic cross-sectional structure;

FIG. 14 is an enlarged view of the portion A of FIG. 1 according to the present invention.

Description of reference numerals:

the motor comprises a motor shell 1, a motor shaft branch 2, a shaft hole 3, an end cover 4, a bearing 5, a stator assembly 6, a rotor assembly 7, a stator core 8, a coil winding 9, a coil I91, a coil II 92, a coil III 93, a coil IV 94, an insulating wire frame 10, a rotor core 11, magnetic steel 12, a self-suction surface 121, a non-self-suction surface 122, a rotor framework 13, stator teeth 14, pole shoes 15, a placing groove 16 and a clamping groove 17.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

The invention provides a bidirectional magnetic suspension sound wave motor device as shown in figures 1-14, which comprises a motor shell 1 and a motor shaft branch 2, wherein the motor shaft branch 2 is arranged at the axis of the motor shell 1, the bottom end of the motor shell 1 is provided with an end cover 4, the axis of the motor shell 1 and the axis of the end cover 4 are both provided with shaft holes 3, the motor shaft branch 2 penetrates through the two shaft holes 3, a bearing 5 is arranged at the joint of the motor shaft branch 2 and the shaft holes 3, a transmission unit is arranged in the motor shell 1 and consists of a stator assembly 6 and a rotor assembly 7, and the rotor assembly 7 is arranged in the stator assembly 6;

the stator assembly 6 comprises a stator core 8 and coil windings 9, wherein both sides of the stator core 8 are provided with insulating wire holders 10, both ends of the inner side of the stator core 8 are provided with stator teeth 14, one side of each stator tooth 14, which is far away from the stator core 8, is fixedly connected with a pole shoe 15, the pole shoe 15 is matched with the rotor assembly 7, both sides of the stator core 8 are respectively wound with the coil windings 9, both ends of each coil winding 9 are respectively wound on the insulating wire holders 10, the stator teeth 14 can be one, two or even more in the same direction, the corresponding coil windings can be one, two or even more, and the shape of each pole shoe 15 can be two or single according to the distribution of the magnetic steel 12 in the space;

the rotor assembly 7 comprises a rotor core 11 and magnetic steel 12, the rotor core 11 is arranged outside the motor shaft branch 2 in a laminated manner, four placing grooves 16 are formed in the surface of the outer side of the rotor core 11, the four placing grooves 16 are symmetrically distributed about a bisector of the rotor core 11, the spacing angle between one placing groove 16 and the placing grooves 16 on the two sides of the placing groove is unequal, the four placing grooves 16 are internally provided with the magnetic steel 12, the four magnetic steels 12 are distributed in a highly staggered manner, the magnetic steel and the stator core form a self-suction surface and a non-self-suction surface, the area of the self-suction surface 121 is larger than that of the non-self-suction surface 122, and in the radial direction, the magnetic steel 12 is sucked by the stator teeth 14, the area of the self-suction surface 121 is larger than that of the non-self-suction surface 122, so that the magnetic steel 12 can be suspended in the radial direction, and in the, in the radial direction, even if the rotor assembly 7 is deflected to the maximum position angle, the area of the self-suction surface 121 is still larger than that of the non-self-suction surface 122, and in the axial direction, even if the rotor assembly 7 is axially displaced to the maximum position, the area of the self-suction surface 121 is still larger than that of the non-self-suction surface 122.

Preferably, the number of the transmission units is set to be one or more, a rotor framework 13 is arranged between two adjacent rotor cores 11, and the two adjacent rotor cores 11 are connected through the rotor framework 13.

Preferably, clamping grooves 17 are formed in two ends of the rotor framework 13, the clamping grooves 17 are matched with the cross-sectional shapes of the rotor iron cores 11, and the clamping grooves 17 are connected with the rotor iron cores 11 in a buckled mode.

Preferably, the cross-sectional shape of the motor housing 1 is flat or circular, the end cover 4 and the stator core 8 are both matched with the inner contour of the motor housing 1, and the end cover 4 is riveted with the motor housing 1.

Preferably, the coil windings 9 are matched with the stator teeth 14, each group of the coil windings 9 is respectively provided with a coil one 91, a coil two 92, a coil three 93 and a coil four 94, a head of the coil one 91 is connected with a tail of the coil two 92, a head of the coil three 93 is connected with a tail of the coil four 94, a head of the coil two 92 is electrically connected with a head of the coil four 94 and is led out, a tail of the coil one 91 is connected with a tail of the coil three 93 and is led out, magnetic fields with the same polarity can be generated in the axial direction, and different magnetic fields can be generated in the radial direction.

Preferably, the four coil windings 9 are divided into two groups, the two groups of coil windings 9 are respectively provided as an upper winding, a lower winding and a left winding and a right winding, the magnetic fields of the upper winding and the lower winding are the same after being electrified, and the magnetic fields of the left winding and the right winding are opposite after being electrified.

Preferably, four the magnet steels 12 are divided into two groups, and the two magnet steels 12 in each group have opposite polarities, and the upper and lower magnetic poles of the two groups of magnet steels 12 are correspondingly the same.

Preferably, one end of the motor shaft branch 2 extends out of one side of the motor shell 1.

The bottom of motor housing 1 is sealed waterproofly through the 4 riveting of end cover, use bearing 5 relative stator module 6 to constitute two-way magnetic suspension motor structure, make motor shaft branch 2 rotate more smoothly, avoid motor shaft branch 2's wearing and tearing, also can stabilize motor shaft branch 2's position simultaneously, and simultaneously, a pair of bearing 5 can make motor shaft branch 2 around both ends atress more even, and the installation is stable, on the one hand, support position is provided for motor shaft branch 2, make things convenient for the compact installation of stator module 6 and rotor subassembly 7, the stable cooperation, on the other hand also can protect inside stator module 6 and rotor subassembly 7 as few as possible the pollution and the influence that receive external environment, guarantee motor shaft branch 2 and last stable power transmission.

All the magnetic steels 12 are distributed around the rotor core 11, the radial distance angle of the adjacent magnetic steels 12 on the rotor core 11 is a preset value, and at least two preset values are different, that is, the radial distance of the magnetic steels 12 on the rotor core 11 is not uniformly distributed, so that the magnetic steels can drive the motor shaft branch 2 to swing left and right, in addition, the axial distance of the adjacent magnetic steels 12 on the rotor core 11 is a preset value, and at least two preset values are different, that is, the axial distance of the magnetic steels 12 on the rotor core 11 is not uniformly distributed, so that the magnetic steels drive the motor shaft branch 2 to reciprocate, the distance angle and the axial distance of the radial magnetic steels are optimized, and when the magnetic steels are applied to an electric toothbrush, the torque and the telescopic distance can be increased, and when the magnetic steels are applied to the electric toothbrush, the cleaning capability of the.

The implementation mode is specifically as follows: when the device is in actual use, the coil winding 9 is electrified to form a magnetic field at the position of the stator iron core 8, the magnetic steel 12 is positioned in the magnetic field, because the radial direction and the axial direction have preset values, the magnetic steel and the axial direction have interaction, the stator with the same polarity pushes the magnetic steel 12 with different polarities, the magnetic steel 12 with the same polarity is subjected to the action force of the magnetic field of the stator with different polarities, so that the magnetic steel 12 is driven to rotate and simultaneously reciprocate up and down with the rotor iron core 11, because the rotor iron core 11 is fixedly connected with the motor shaft branch 2, the motor shaft branch 2 is driven to rotate and simultaneously reciprocate up and down, the coil winding 9 switches the current direction and controls the electrifying time through an external circuit, so that the rotor generates left, right and up and down reciprocating motion, the rotor assembly 7 moves corresponding to the motion of the motor shaft branch 2, the transmission of the motion is realized by the electromagnetic effect, elastic structures such as torsion, 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 the device is applied to electric toothbrush, can lighten electric toothbrush's weight, the up-and-down concertina movement more is close to the impression of brushing teeth in daily life in the horizontal hunting, the cleaning action promotes greatly, transmit power through the electromagnetic structure, make the power transmission process more stable, the swing amplitude of motor shaft branch 2 can not produce great change when facing different loads, convenience of customers uses, the blank that electric toothbrush does not have axial concertina movement except radial horizontal hunting on having filled in the market, this embodiment has specifically solved the problem that the current electric toothbrush that exists is not convenient for all-round clear among the prior art.

The working principle of the invention is as follows:

referring to the attached figures 1-7 of the specification, the coil winding 9 is electrified to form a magnetic field at the stator core 8, the magnetic steel 12 is positioned in the magnetic field, because the radial direction and the axial direction have preset values, the stator with the same polarity pushes the magnetic steel 12 with different polarities under the interaction, the magnetic steel 12 with the same polarity is acted by the magnetic field of the stator with different polarities, thereby driving the magnetic steel 12 and driving the rotor core 11 to rotate and simultaneously reciprocate up and down, because the rotor core 11 is fixedly connected with the motor shaft 5, the motor shaft 2 is driven to swing left and right and simultaneously reciprocate up and down, the coil winding 9 switches the current direction and controls the electrifying time through an external circuit, thereby the rotor generates left and right reciprocating motion and up and down, the rotor assembly 7 moves corresponding to the motion of the motor shaft 2, the transmission of the motion is realized by the electromagnetic effect, the power is transmitted, the toothbrush head is driven to swing in a reciprocating way, and meanwhile, teeth are effectively cleaned.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. The utility model provides a two-way magnetic suspension sound wave motor device, includes motor housing (1) and motor shaft branch (2), motor shaft branch (2) set up in motor housing (1) axle center department, its characterized in that: the motor is characterized in that an end cover (4) is arranged at the bottom end of the motor shell (1), shaft holes (3) are formed in the shaft centers of the motor shell (1) and the end cover (4), the motor shaft branch (2) penetrates through the two shaft holes (3), a bearing (5) is arranged at the joint of the motor shaft branch (2) and the shaft holes (3), a transmission unit is arranged inside the motor shell (1), the transmission unit is composed of a stator assembly (6) and a rotor assembly (7), and the rotor assembly (7) is arranged inside the stator assembly (6);

the stator assembly (6) comprises a stator core (8) and coil windings (9), insulating wire frames (10) are arranged on two sides of the stator core (8), stator teeth (14) are arranged on two ends of the inner side of the stator core (8), one side, far away from the stator core (8), of each stator tooth (14) is fixedly connected with a pole shoe (15), each pole shoe (15) is matched with the rotor assembly (7), the coil windings (9) are wound on two sides of the stator core (8), and two ends of each coil winding (9) are wound on the insulating wire frames (10);

rotor subassembly (7) include rotor core (11) and magnet steel (12), rotor core (11) are folded and are pressed the setting in motor shaft branch (2) outside, four standing groove (16), four have been seted up on rotor core (11) outside surface standing groove (16) bisector symmetric distribution, and an interval angle inequality between standing groove (16) and its both sides standing groove (16), four all be equipped with magnet steel (12), four in standing groove (16) magnet steel (12) highly staggered distribution, magnet steel and stator core have formed from the face of inhaling and the non-face of inhaling, and are greater than the non-from face of inhaling (122) area from face (121) area.

2. The bidirectional magnetic levitation acoustic wave motor device according to claim 1, wherein: the number of transmission units sets up to one or more, is equipped with rotor skeleton (13) between two adjacent rotor core (11), and two adjacent rotor core (11) are connected through rotor skeleton (13).

3. A bidirectional magnetic levitation acoustic wave motor apparatus as recited in claim 2, wherein: joint groove (17) have all been seted up at rotor skeleton (13) both ends, the cross-sectional shape phase-match of joint groove (17) and rotor core (11), and joint groove (17) are connected with rotor core (11) lock.

4. The bidirectional magnetic levitation acoustic wave motor device according to claim 1, wherein: the cross-sectional shape of the motor shell (1) is flat or circular, the end cover (4) and the stator core (8) are matched with the inner contour of the motor shell (1), and the end cover (4) is riveted with the motor shell (1).

5. The bidirectional magnetic levitation acoustic wave motor device according to claim 1, wherein: coil winding (9) and stator tooth (14) phase-match, every group coil winding (9) are provided with coil one (91), coil two (92), coil three (93) and coil four (94) respectively, the end of coil one (91) connects the tail of coil two (92), the end of coil three (93) connects the tail of coil four (94), the end of coil two (92) and the end electric connection of coil four (94) just draw forth, the tail of coil one (91) and the tail of coil three (93) are connected together and are drawn forth.

6. The bidirectional magnetic levitation acoustic wave motor device according to claim 1, wherein: the four coil windings (9) are divided into two groups, the two groups of coil windings (9) are respectively arranged into an upper winding, a lower winding and a left winding and a right winding, the magnetic fields of the upper winding and the lower winding are the same after being electrified, and the magnetic fields of the left winding and the right winding are opposite after being electrified.

7. The bidirectional magnetic levitation acoustic wave motor device according to claim 1, wherein: the four magnetic steels (12) are divided into two groups, the two magnetic steels (12) in each group are opposite in polarity, and the upper magnetic poles and the lower magnetic poles of the two groups of magnetic steels (12) are correspondingly the same.

8. The bidirectional magnetic levitation acoustic wave motor device according to claim 1, wherein: one end of the motor shaft branch (2) extends out of one side of the motor shell (1).