阅读说明：本技术 一种电动牙刷马达 (Electric toothbrush motor ) 是由 张震坚 庞广陆 于 2020-08-07 设计创作，主要内容包括：本发明公开了一种电动牙刷马达,包括外壳、铁芯组立、轴-磁环组立、上含油轴承、下含油轴承和后端盖,铁芯组立包括铁芯,铁芯的内部相对布置有一对两槽铁芯磁钢,每个两槽铁芯磁钢外均套设有绝缘物,线圈通过绝缘物缠绕在两槽铁芯磁钢的两槽之间,两个线圈通电产生同向的交变磁场,并且绝缘物将线圈与两槽铁芯磁钢隔离；轴-磁环组立包括轴及设置在轴上的轴套,轴套的下部设置有对称的一对限位卡头,轴套周围分布有两组磁体,两组磁体与通电的线圈的磁场作用,产生周期扭转驱动力,使得轴绕轴心周期性摆动扭转,后端盖的上部设置有一对对称的卡槽,卡槽用于限制限位卡头的扭转幅度。本发明在稳定了振动频率的同时,稳定了振动的幅度。(The invention discloses an electric toothbrush motor, which comprises a shell, an iron core assembly, an axis-magnetic ring assembly, an upper oil-containing bearing, a lower oil-containing bearing and a rear end cover, wherein the iron core assembly comprises an iron core, a pair of two-groove iron core magnetic steels are oppositely arranged in the iron core, an insulator is sleeved outside each two-groove iron core magnetic steel, a coil is wound between two grooves of the two-groove iron core magnetic steels through the insulator, the two coils are electrified to generate a equidirectional alternating magnetic field, and the coil is isolated from the two-groove iron core magnetic steels by the insulator; the shaft-magnetic ring assembly comprises a shaft and a shaft sleeve arranged on the shaft, a pair of limiting chucks which are symmetrical is arranged at the lower part of the shaft sleeve, two groups of magnets are distributed around the shaft sleeve, and the two groups of magnets act with a magnetic field of an electrified coil to generate periodic torsion driving force so that the shaft periodically swings and twists around a shaft center, and a pair of symmetrical clamping grooves are arranged at the upper part of the rear end cover and are used for limiting the torsion amplitude of the limiting chucks. The invention stabilizes the vibration frequency and stabilizes the vibration amplitude.)

1. An electric toothbrush motor characterized by: the magnetic-field-free motor comprises a shell, an iron core assembly, an axis-magnetic ring assembly, an upper oil-containing bearing, a lower oil-containing bearing and a rear end cover, wherein the iron core assembly comprises an iron core, a pair of two-groove iron core magnetic steels are oppositely arranged inside the iron core, an insulator is sleeved outside each two-groove iron core magnetic steel, a coil is wound between two grooves of the two-groove iron core magnetic steels through the insulator, the two coils are electrified to generate a equidirectional alternating magnetic field, and the coil is isolated from the two-groove iron core magnetic steels through the insulator; the shaft-magnetic ring assembly comprises a shaft and a shaft sleeve arranged on the shaft, a pair of limiting chucks are symmetrically arranged at the lower part of the shaft sleeve, two groups of magnets are distributed around the shaft sleeve, wherein each group of magnets comprises two magnetic sheets, wherein one magnetic sheet in each group of magnets is from S pole to N pole from the axis of the shaft to the radial direction of the shaft, the other magnetic sheet is from N pole to S pole from the axis of the shaft to the radial direction, the groups are arranged in a crossing way, the two groups of magnets act with the magnetic field of the energized coil to generate periodic torsion driving force, so that the shaft periodically swings and twists around the axis, the upper oil-retaining bearing is arranged at the upper part of the shaft, the lower oil-retaining bearing is arranged at the lower part of the shaft, the upper part of the rear end cover is provided with a pair of symmetrical clamping grooves, the limiting clamping head is located in the clamping groove, and the clamping groove is used for limiting the torsion amplitude of the limiting clamping head.

2. The electric toothbrush motor of claim 1, wherein: the two groups of magnets act with the magnetic field of the energized coil to generate periodic torsion driving force, so that the shaft is twisted by a symmetrical angle when periodically swinging around the axis.

3. The electric toothbrush motor of claim 1, wherein: the shaft is also sleeved with an axial magnetic ring which is axially magnetized, the rear end cover is also wound with a coaxial axial force coil, the axial force coil is electrified to generate an alternating magnetic field, and the magnetic field interacts with the axial magnetic ring on the shaft-magnetic ring assembly to enable the shaft to generate axial translational reciprocating vibration.

4. The electric toothbrush motor of claim 3, wherein: the axial magnetic ring is arranged at the lower part of the limiting chuck, is connected with the shaft sleeve and is in interference fit with the shaft, or is arranged below the limiting chuck, is connected with the shaft sleeve and is in interference fit with the shaft.

5. The electric toothbrush motor of claim 3, wherein: the rear end cover is fixedly sleeved outside the lower oil-retaining bearing.

6. The electric toothbrush motor of claim 5, wherein: the iron core, the insulator and the rear end cover are sleeved in the shell, and the rear end cover is fixed to the inner wall of the shell.

7. The electric toothbrush motor of claim 1, wherein: the width of the limiting clamping heads is the same, the groove width of the clamping grooves is the same, the groove width is larger than that of the limiting clamping heads, and the larger width is matched with the torsion amplitude of the shaft.

Technical Field

The invention relates to the technical field of motors, in particular to an electric toothbrush motor.

Background

Its vibration mode of present electric toothbrush is mostly the periodic oscillation of axle, drive brush head brush hair part at the oral cavity reciprocating motion, high-frequency vibration through the vibration axle clears away the tartar on the tooth flank of tooth, the single reciprocating motion mode of brush head is difficult to effectively clear away the tartar between the slit, and for improving clean effect, present linear motor or ultrasonic vibration can increase vibration frequency, but higher vibration frequency can let user's travelling comfort discount greatly through the electric toothbrush handle, moreover, the vibration range of the vibration axle of present motor is also too fixed, thus, make whole electric toothbrush use very unstable.

Disclosure of Invention

Based on the defects of the prior art, the invention provides the electric toothbrush motor which can stabilize the vibration frequency and the vibration amplitude and ensure that the using effect of the vibration toothbrush is better.

The technical scheme of the invention is as follows:

an electric toothbrush motor characterized by: the magnetic-field-free motor comprises a shell, an iron core assembly, an axis-magnetic ring assembly, an upper oil-containing bearing, a lower oil-containing bearing and a rear end cover, wherein the iron core assembly comprises an iron core, a pair of two-groove iron core magnetic steels are oppositely arranged inside the iron core, an insulator is sleeved outside each two-groove iron core magnetic steel, a coil is wound between two grooves of the two-groove iron core magnetic steels through the insulator, the two coils are electrified to generate a equidirectional alternating magnetic field, and the coil is isolated from the two-groove iron core magnetic steels through the insulator; the shaft-magnetic ring assembly comprises a shaft and a shaft sleeve arranged on the shaft, a pair of limiting chucks are symmetrically arranged at the lower part of the shaft sleeve, two groups of magnets are distributed around the shaft sleeve, wherein each group of magnets comprises two magnetic sheets, wherein one magnetic sheet in each group of magnets is from S pole to N pole from the axis of the shaft to the radial direction of the shaft, the other magnetic sheet is from N pole to S pole from the axis of the shaft to the radial direction, the groups are arranged in a crossing way, the two groups of magnets act with the magnetic field of the energized coil to generate periodic torsion driving force, so that the shaft periodically swings and twists around the axis, the upper oil-retaining bearing is arranged at the upper part of the shaft, the lower oil-retaining bearing is arranged at the lower part of the shaft, the upper part of the rear end cover is provided with a pair of symmetrical clamping grooves, the limiting clamping head is located in the clamping groove, and the clamping groove is used for limiting the torsion amplitude of the limiting clamping head.

Furthermore, the two groups of magnets act with the magnetic field of the energized coil to generate a periodic torsion driving force, so that the shaft is twisted by a symmetrical angle when periodically swinging and twisting around the shaft center.

Further, an axial magnetic ring is further sleeved on the shaft and is axially magnetized, a coaxial axial force coil is further wound on the rear end cover and is electrified to generate an alternating magnetic field, and the magnetic field interacts with the axial magnetic ring on the shaft-magnetic ring assembly to enable the shaft to generate axial translation reciprocating vibration.

Further, the axial magnetic ring is arranged at the lower part of the shaft sleeve, is connected with the shaft sleeve and is in interference fit with the shaft, or the axial magnetic ring is arranged below the limiting clamping head, is connected with the shaft sleeve and is in interference fit with the shaft.

Furthermore, the rear end cover is fixedly sleeved outside the lower oil-retaining bearing.

Further, the iron core, the insulator and the rear end cover are sleeved in the shell, and the rear end cover is fixed to the inner wall of the shell.

Further, the width of the limiting clamping heads is the same, the groove width of the clamping grooves is larger than the width of the limiting clamping heads, and the larger width is matched with the torsion amplitude of the shaft.

The invention has the beneficial effects that: two groups of magnets are distributed on the shaft sleeve to generate periodic torsional driving force, and the limiting clamping head below the shaft sleeve and the clamping groove in the rear end cover are combined to limit the torsional swing of the shaft to a certain range, so that the vibration frequency is stabilized, and the vibration range is stabilized.

Drawings

Fig. 1 is a schematic structural view of an iron core assembly of the present embodiment;

fig. 2 is a schematic structural diagram of the iron core of the present embodiment;

FIG. 3 is a schematic structural diagram of the insulator of the present embodiment;

FIG. 4 is a partial schematic structural view of the shaft-magnetic ring assembly of the present embodiment;

FIG. 5 is a schematic structural view of the shaft-magnet ring assembly of the present embodiment installed on the rear end cap;

FIG. 6 is a schematic structural view of the rear end cap of the present embodiment;

FIG. 7 is a schematic view of the magnet layout structure of the shaft-magnet ring assembly of the present embodiment;

FIG. 8 is a schematic structural view of the present embodiment after being provided with the axial magnetic ring;

FIG. 9 is a schematic structural view of the present embodiment after the upper oil retaining bearing and the lower oil retaining bearing are installed after the axial magnetic ring is installed;

FIG. 10 is a schematic structural view of the present embodiment after being provided with an axial magnetic ring and an axial force coil;

FIG. 11 is an enlarged schematic structural view of the rear end cap of the present embodiment after being provided with an axial force coil;

fig. 12 is a schematic sectional view of the housing of the present embodiment.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features of the following embodiments and examples may be combined with each other without conflict.

As shown in fig. 1 to 3, an electric toothbrush motor includes a housing 1, an iron core assembly 2, a shaft-magnetic ring assembly 3, an upper oil-retaining bearing 4, a lower oil-retaining bearing 5, and a rear end cap 6, wherein the iron core assembly 2 includes an iron core 21, a pair of two-slot iron core magnetic steels 22 are oppositely disposed inside the iron core 21, an insulator 23 is sleeved outside each two-slot iron core magnetic steel 22, the iron core 21 is a cavity penetrating up and down, the two-slot iron core magnetic steels 22 are symmetrically disposed in the cavity, the insulator 23 of the present embodiment includes an upper insulator 231 and a lower insulator 232, the upper insulator 231 is inserted into the two-slot iron core magnetic steels 22 from the upper portion of the iron core 21, the lower insulator 232 is inserted into the two-slot iron core magnetic steels 22 from the lower portion of the iron core 21, the lower portion of the upper insulator 231 abuts against the upper portion of the lower insulator 232 to form an integral insulator, two coils 9 are wound between the two slots of the two-slot iron core magnetic steels 22 through the integral insulator, the two coils 9 are electrified to generate an alternating magnetic field in the same direction, and the coil 9 is isolated from the two-slot iron core magnetic steel 22 by the insulator.

As shown in fig. 4-7, the shaft-magnetic ring assembly 3 includes a shaft 31 and a shaft sleeve 32 disposed on the shaft 31, a pair of limiting chucks 33 is symmetrically disposed at a lower portion of the shaft sleeve 32, two sets of magnets 34 are distributed around the shaft sleeve 32, each set of magnets includes two magnetic sheets, one magnetic sheet of each set of magnets is from S pole to N pole from the axial center of the shaft 31 to the radial direction thereof, the other magnetic sheet is from N pole to S pole from the axial center of the shaft 31 to the radial direction thereof, the sets are disposed in a crossing manner, the two sets of magnets generate a periodic torsional driving force under the action of a magnetic field of an energized coil, so that the shaft 31 periodically swings and twists around the axial center, the upper oil-containing bearing 4 is disposed at an upper portion of the shaft 31, the lower oil-containing bearing 5 is disposed at a lower portion of the shaft 31, and the two sets of magnets generate a periodic torsional driving force under the action of a magnetic field of an energized coil, twisting a symmetrical angle.

The upper portion of rear end cap 6 is provided with the draw-in groove 61 of a pair of symmetry, spacing dop 33 is located in the draw-in groove 61, draw-in groove 61 is used for the restriction spacing dop 33's range of torsion, wherein, spacing dop 33's width is the same, draw-in groove 61's groove width is the same to, draw-in groove 61's groove width, and, the groove width is greater than spacing dop 33's width, the width that is greater than and axle 31's torsional range phase-match can guarantee like this that axle 31 is torsional range the same under the effect of torsional drive power, has stabilized amplitude of swing. The angle a in fig. 7 is a symmetrical twisted angle, and the angle a can be designed to be 1 degree in this embodiment, and the twisted angle is related to the size of the magnetic field and the widths of the slot and the limit chuck, and can be adjusted according to actual conditions in practice.

As shown in fig. 8-11, the shaft 31 is further sleeved with an axial magnetic ring 7, the axial magnetic ring is axially magnetized to provide a physical basis for axial translation of the shaft, the rear end cover 6 is further wound with a coaxial axial force coil 8, the axial force coil 8 is energized to generate an alternating magnetic field, and the alternating magnetic field interacts with the axial magnetic ring 7 on the shaft-magnetic ring assembly to enable the shaft 31 to generate axial translational reciprocating vibration, i.e., simple harmonic vibration.

The axial magnetic ring 7 is arranged at the lower part of the shaft sleeve 32 and connected with the shaft sleeve 32, or the axial magnetic ring 7 is arranged below the shaft sleeve 32 and connected with the shaft sleeve 32. In this embodiment, the rear end cap 6 is fixedly sleeved outside the lower oil-retaining bearing 5, and the upper oil-retaining bearing is shown in fig. 10.

As shown in fig. 12, the housing 1 at least houses the iron core 21, the insulator and the rear end cap 6, the rear end cap 6 is fixed to the inner wall of the housing 1, and in addition, the two oil-containing bearings are coaxially arranged with the shaft 31, so that the shaft 31 can axially translate and rotate around the shaft, when the shaft 31 axially moves, the shaft 31 realizes simple harmonic motion relative to the rear end cap 6 through the oil-containing bearings, and also realizes simple harmonic motion relative to the housing 1, so that the length of the housing 1 is required to reserve a certain axial vibration space for the axial vibration of the shaft 31.

In this embodiment, the torsional oscillation of the shaft 31 can be limited to a certain range without providing the axial magnetic ring 7 and the axial force coil 8, and the vibration frequency and the vibration range are stabilized. Under the condition that the axial magnetic ring 7 and the axial force coil 8 are added, the axial simple harmonic motion can be further generated on the shaft 31, the motion mode of the shaft 31 is changed from bidirectional swing to axial two-direction vibration and 4-direction motion swinging around the left direction and the right direction of the shaft, and the cleaning effect is improved on the premise of not influencing the use comfort of a user.

The above embodiments are merely representative of the centralized embodiments of the present invention, and the description thereof is specific and detailed, but it should not be understood as the limitation of the scope of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the spirit of the present invention, and these changes and modifications all fall into the protection scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.