WO2021129088A1

WO2021129088A1 - Motor support for mounting permanent magnet and coil, magnetic suspension sonic motor, and oral cavity cleaning appliance

Info

Publication number: WO2021129088A1
Application number: PCT/CN2020/122646
Authority: WO
Inventors: 李冬保; 李保正
Original assignee: 深圳瑞圣特电子科技有限公司
Priority date: 2019-12-23
Filing date: 2020-10-22
Publication date: 2021-07-01
Also published as: CN110957883A

Abstract

The present invention provides a motor support for mounting a permanent magnet and a coil, a magnetic suspension sonic motor, and an oral cavity cleaning appliance. In the motor support for mounting a permanent magnet and a coil, the motor support is provided with a permanent magnet mounting part and a coil winding part, a swing gap is formed between the permanent magnet mounting part and the coil winding part, an iron core accommodating part is also provided on the motor support, and an opening is formed between the iron core accommodating part and the swing gap, so that an iron core can extend to the swing gap through the opening. When the motor support of the present invention is used for manufacturing a motor, the iron core can have a larger swing angle while miniaturization is guaranteed, and a larger amplitude is provided for the magnetic suspension sonic motor.

Description

Motor bracket for installing permanent magnets and coils, magnetic levitation sonic motor and oral cleaning appliances

Technical field

The invention relates to the field of micro-motor manufacturing and oral cleaning appliances, and in particular to a motor bracket for installing permanent magnets and coils, a magnetic suspension acoustic wave motor and an oral cleaning appliance.

Background technique

In recent years, with the improvement of consumption levels, the popularization of oral care knowledge, and the continuous enrichment of product categories and functions, electric toothbrushes have become one of the fastest-growing small household appliances categories in China. Electric toothbrushes use the high-speed movement of a micro-motor to drive the toothbrush head to swing at high speed from side to side to generate mechanical vibration. The vibration frequency is the same or similar to the frequency of the sound wave to achieve a super cleaning effect. Since electric toothbrushes mainly rely on micro-motors to drive to achieve cleaning, the performance of micro-motors is one of the important factors that determine the performance of electric toothbrushes.

In order to meet the different oral health conditions and usage habits of consumers, electric toothbrushes usually have multiple usage modes. Some usage modes require a wider amplitude in order to fully cover the surface of the teeth and achieve efficient cleaning. This requires the motor of the electric toothbrush to be able to Provides a wider amplitude. On the other hand, when purchasing an electric toothbrush, the size is too large, which means that it is not portable enough, and it is the demand of many users to be exquisite and compact, which requires the motor of the electric toothbrush to be miniaturized. Therefore, the market urgently needs a motor that can provide a wide amplitude while being miniaturized.

At the same time, the structure of the existing micro motor is relatively complex, the performance is unstable, the connection quality between the rotor assembly and the stator assembly is not high, the consistency and the reliability are poor, and the electric toothbrush is prone to malfunctions, which may cause the electric toothbrush to not be used normally. At the same time, the assembly is relatively cumbersome. The assembly and production efficiency of the motor is low. For this reason, the present invention was developed under this background.

Summary of the invention

The purpose of the present invention is to solve the problems existing in the prior art. On the one hand, it provides a motor support for mounting permanent magnets and coils. On the other hand, it provides a magnetic levitation sonic motor. On the other hand, it provides a mouth cleaning. appliance.

In order to solve the above-mentioned problems, on the one hand, the technical solution adopted by the present invention is:

A motor bracket for mounting permanent magnets and coils, the motor bracket is provided with a permanent magnet mounting portion and a coil winding portion, a swing gap is provided between the permanent magnet mounting portion and the coil winding portion, and the motor bracket is also An iron core accommodating portion for penetrating the shaft is provided, and an opening is provided between the iron core accommodating portion and the swing gap, so that the iron core of the rotor can extend to the swing gap through the opening.

Preferably, the motor bracket is further provided with a shaft receiving part for passing through the shaft, and the coil winding part includes a coil winding part arranged between the permanent magnet mounting part and the shaft receiving part. A pair of supporting side walls, wherein any one of the supporting side walls is opened in a V shape.

Preferably, the motor support includes: a first frame with a first penetration portion provided on the first frame; a second frame with a second penetration portion provided on the second frame; The frame and the second frame are connected to each other, so that the first penetration portion and the second penetration portion can be used to penetrate the shaft, and a part of the first frame is connected to the second A part of the frame together constitutes the permanent magnet mounting part, and the other part of the first frame and the other part of the second frame together constitute the coil winding part; when the first frame and the When the second frame is relatively far away, the permanent magnet mounting portion is enlarged for mounting and dismounting the permanent magnet; when the first frame and the second frame are relatively close, the permanent magnet mounting portion is reduced to tighten the permanent magnet述Permanent magnets.

Preferably, the permanent magnet mounting portion includes four first sink grooves arranged on the first frame, and the four first sink grooves are arranged annularly with respect to the shaft center of the shaft; The magnet mounting part further includes four second sink grooves arranged on the second frame, and the four second sink grooves are arranged annularly with respect to the shaft center of the shaft; any one on the first frame The first sink slot is matched with one of the second sink slots on the second frame, and the matched first sink slot and the second sink slot are parallel to the shaft The direction of the axis is arranged.

Preferably, the opening angle C of the V-shaped supporting side wall conforms to 90°≤C<180°.

Preferably, the first frame includes a first bottom plate, the first bottom plate is provided with two first circular notches arranged symmetrically with respect to the axis of the shaft, and the first bottom plate is located on the same side. There are four first sink grooves arranged symmetrically with respect to the axis of the shaft, and the supporting side wall includes a side of the first sink on the first bottom plate along the axial direction of the shaft. Extend and spaced apart two first side walls, the upper ends of the two first side walls are provided with plug pins; the second frame includes a second bottom plate, the second bottom plate is provided with Two second circular notches arranged symmetrically with respect to the axis of the shaft, the second bottom plate is provided on the same side with four second sink grooves arranged symmetrically with respect to the axis, and the supporting side wall includes the On the second bottom plate, there are two second side walls extending and spaced apart on one side of the second sink groove and extending along the axis of the shaft. The upper ends of the two second side walls are both provided with The connecting hole into which the plug pin is inserted; the first penetration portion is provided on the first bottom plate, and the second penetration portion is provided on the second bottom plate; the first sink groove and the The second sink groove is matched to form the permanent magnet mounting part; the first side wall, the second side wall, the first bottom plate and the second bottom plate form the coil winding part. The opening angle C of the V-shaped supporting side wall conforms to 90°≤C<180°.

Preferably, the other side of the first bottom plate opposite to the first sink is provided with a first protruding column; the other side of the second bottom plate opposite to the second sink is provided with a first Two convex columns.

On the other hand, a magnetic levitation sonic motor is provided, which includes the motor bracket for installing permanent magnets and coils in any one of the foregoing solutions. The motor bracket is equipped with coils, permanent magnets, and also includes an iron core, a shaft, a bearing, and a shell. The iron core is fixedly mounted on the shaft; the shaft passes through the first penetration portion and the second penetration portion, and is fixedly connected to the housing through a bearing.

Preferably, the iron core is an I-shaped iron core, a shaft connecting hole is provided in the middle of the iron core for the shaft to pass through, and the iron core also includes a straight line located on both sides of the shaft connecting hole. A supporting wall arranged symmetrically, and the end of the supporting wall is connected with a driving wing.

In another aspect, an oral cleaning appliance is provided, which is installed with the aforementioned magnetic levitation acoustic wave motor.

The present invention provides a motor support for mounting permanent magnets and coils. The motor support is provided with a permanent magnet mounting portion and a coil winding portion, and a swing gap is provided between the permanent magnet mounting portion and the coil winding portion, An iron core accommodating part is also provided on the motor support, and an opening is provided between the iron core accommodating part and the swing gap, so that the iron core of the rotor can extend to the swing gap through the opening. In the present invention, the area for the coil to be wound is relatively larger, so in the energized state, a larger magnetic force can be generated to drive the iron core to rotate. Second, because the stroke space provided to the rotor core through the permanent magnet mounting portion is provided, a larger swing space is provided for the rotor core, thereby increasing the amplitude of the rotor. Under the condition of ensuring high power and large amplitude, the present invention also has the advantage of low noise. When the motor support is assembled to form a motor product, and the motor with the motor support structure is applied to an oral cleaning appliance, naturally, the above-mentioned beneficial effects are also provided.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the three-dimensional structure of the motor bracket viewed from one direction.

Figure 2 is one of the exploded structure diagrams of the motor support.

Figure 3 is the second schematic diagram of the exploded structure of the motor support.

Figure 4 is a top view of the first frame in the motor support.

Figure 5 is a bottom view of the second frame in the motor support.

Fig. 6 is a schematic diagram of the three-dimensional structure after winding the coil on the electrode holder and installing the permanent magnet.

Fig. 7 is a three-dimensional schematic diagram of the internal structure of the maglev sonic motor after the housing and the base are hidden.

Figure 8 is a three-dimensional schematic diagram of the internal structure of the maglev sonic motor after the shell is hidden

Fig. 9 is a schematic diagram of a three-dimensional structure of a magnetic levitation acoustic wave motor.

Figure 10 is a schematic diagram of the explosive structure of a magnetic levitation sonic motor.

Fig. 11 is a schematic diagram of an axial cross-sectional structure of a magnetic levitation acoustic wave motor.

Fig. 12 is a schematic diagram of a radial cross-sectional structure of a magnetic levitation acoustic wave motor.

Figure 13 is one of the schematic diagrams of the working principle of the maglev sonic motor.

Figure 14 is the second schematic diagram of the working principle of the magnetic levitation sonic motor.

Figure 15 is the third schematic diagram of the working principle of the magnetic levitation sonic motor.

In the figure, 10, motor bracket; 11, plug pin; 12, connecting hole; 13, fan ring opening; 20, coil; 30, permanent magnet; 40, iron core; 50, shaft; 60, upper bearing; 70 , Lower bearing; 80, upper cover; 90, base; 100, cavity; 801, mounting hole; 901, bearing hole; 902, annular step; 903, protrusion; 101, first frame; 102, second frame 1012, the first penetration part; 1021, the second penetration part; 401, the shaft connecting hole; 402, the supporting wall; 403, the driving wing; 4031, the arc surface; 1011, the first bottom plate; 1013, the first Fan ring gap; 1014, first sink groove; 1015, first side wall; 1016, first baffle plate; 1022, second bottom plate; 1023, second fan ring gap; 1024, second sink groove; 1025, second 1026, the second baffle; 1066, the swing gap; 1017, the first convex post; 1027, the second convex post.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. , Or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.

In the present invention, unless expressly stipulated and defined otherwise, the "above" or "below" of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than that of the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

Hereinafter, the present invention will be further described in detail through specific embodiments in conjunction with the accompanying drawings.

1-12, a magnetic levitation sonic motor is shown, which includes a motor support 10 on which a coil 20, a permanent magnet 30 are mounted, and an iron core 40, a shaft 50, a bearing, and a shell The iron core 40 is fixedly mounted on the shaft 50. Specifically, the bearing includes an upper bearing 60 and a lower bearing 70, and the housing includes an upper cover 80 and a base 90. The motor support 10 is accommodated in the cavity 100 between the upper cover 80 and the base 90. The upper cover 80 is provided with a mounting hole 801. The outer ring of the upper bearing 60 is matched with the mounting hole 801, and the inner ring of the upper bearing 60 and the shaft The rod 50 has an interference fit, the base 90 is provided with a bearing hole 901, the lower bearing 70 is installed in the bearing hole 901 through its outer ring, the inner ring of the lower bearing 70 is in interference fit with the shaft 50, and the bearing inner ring It can rotate relative to the outer ring, so that the shaft 50 can move relative to the housing.

In the present invention, the iron core is fixed on the shaft, and the shaft is inserted in the motor bracket. The motor bracket 10 forms an iron core accommodating portion and a shaft accommodating portion, that is, a space for installing the iron core and the shaft is formed on the motor bracket. According to the working principle of the motor, it can be known that when the iron core is driven, the shaft will rotate as long as this function can be realized. Therefore, the specific shapes of the iron core receiving part and the shaft receiving part are not limited.

In order to connect the upper cover 80 and the base 90 together, the base 90 is provided with an annular step 902 and a raised portion 903. When the base 90 is assembled with the upper cover 80, the raised portion 903 is inserted into the upper cover 80. The side wall of the upper cover 80 abuts the step 902. In order to supply power to the coil 20, a hole or gap (not shown) for the coil 20 to pass through is provided on the base 90.

Referring to Figures 1-3, the motor support 10 includes a first frame 101 and a second frame 102. The first frame and the second frame are produced independently, and the two are combined together during assembly. The first frame 101 is provided with a first penetration portion 1012; the second frame 102 is provided with a second penetration portion 1021. Specifically, as a preferred embodiment, the first penetration portion in this embodiment And the second penetration part are both through holes. After the first frame and the second frame are assembled, the first penetration part 1012 and the second penetration part 1021 are coaxial, which can be used for penetration as a rotor part It should be noted that the apertures of the first penetration portion 1012 and the second penetration portion 1021 are larger than the outer diameter of the corresponding position of the shaft, so that the motor bracket 10 as a stator component does not contact the shaft 50, The shaft 50 is caused to swing and does not generate friction with the motor support 10 to cause energy loss. In order to enable the shaft 50 to be driven, the iron core 40 is fixedly connected to the shaft 50. As a preferred embodiment, in this embodiment, the iron core 40 is an I-shaped iron core, and a shaft connecting hole is provided in the middle of the iron core. 401 is for the shaft 50 to pass through. The iron core 40 also includes a supporting wall 402 located on both sides of the shaft connecting hole 401 and arranged in a line-shaped symmetry. The end of the supporting wall 402 is connected with a driving wing 403, and the driving wing 403 is A circular arc surface 4031 is provided. The circular arc surface 4031 forms a force receiving surface. When the circular arc surface 4031 receives a force, the iron core can be driven to rotate. Therefore, the iron core 40 and the shaft 50 constitute the rotor of the motor. In the present invention, there is no need to provide a coil on the iron core 40, which is excited by a coil located outside. After the coil is energized, a magnetic field is generated by a changing electric field, and both ends of the iron core 40 form an N pole and an S pole correspondingly.

In order to install the coil 20 and the permanent magnet 30, the motor support 10 is further described below. The first frame 101 includes a first bottom plate 1011, the first penetration portion 1012 is disposed on the first bottom plate 1011, and the first bottom plate 1011 is arranged symmetrically with respect to the axis of the first penetration portion 1012 Two first circular notches 1013 in the first bottom plate 1011 are provided on the same side with four first sink grooves 1014 arranged symmetrically with respect to the axis of the first penetration portion 1012, and the first bottom plate 1011 On one side of the first sink groove 1014, two first side walls 1015 extending along the axial direction of the first penetration portion 1012 and spaced apart are provided. The upper ends of the two first side walls 1015 are equal to each other. A plug pin 11 protruding along the axial direction of the first penetration portion 1012 is provided, and the two first side walls 1015 located below the plug pin 11 are each provided with a first baffle 1016; The second frame 102 includes a second bottom plate 1022, the second penetration portion 1021 is disposed on the second bottom plate 1022, and the second bottom plate 1022 is arranged symmetrically with respect to the axis of the second penetration portion 1021 Two second circular notches 1023, four second sink grooves 1024 arranged symmetrically with respect to the axis of the second penetration portion 1021 on the same side of the second bottom plate 1022, on the second bottom plate 1022 Located on one side of the second sink slot 1024 is provided with two second side walls 1025 extending along the axial direction of the second penetration portion 1021 and spaced apart. The upper ends of the two second side walls 1025 are both provided with There is a connecting hole 12 into which the plug pin 11 is inserted, and the two second side walls 1025 above the connecting hole 12 are each provided with a second baffle 1026; the first frame 101 and the The second frame 102 can be connected to the connecting hole 12 through the fitting pin 11. As a preferred embodiment, the plug pin 11 and the connecting hole 12 can be eliminated, and the first frame 101 and the second frame 102 can be connected together by ultrasound or glue. The first sink groove 1014 and the second sink groove 1024 are matched to form a permanent magnet mounting portion that clamps the permanent magnet 30; as a preferred embodiment, the permanent magnet 30 is a bar magnet, and one end of the bar magnet is clamped In the first sink slot 1014, the other end of the bar magnet is clamped in the second sink slot 1024. Since the first frame 101 and the second frame 102 are of separate design, there is no need to worry about the machining error of the bar magnet. The situation of the assembly. In this embodiment, there are 4 bar magnets in total, and the installation methods are the same. The two bar magnets that are relatively close together form a group. Thus, two sets of permanent magnets are formed on the motor support 10; In any set of permanent magnets, the two bar magnets have opposite polarities on the same side ends. In the two sets of permanent magnets, the arrangement of one set of permanent magnets on one side of the motor support is the same as that of the other on the other side of the motor support. The arrangement of a set of permanent magnets is the same. The two sets of permanent magnets are arranged symmetrically with respect to the axis of the iron core 40. In this way, when the coil 20 is not energized, the two sets of permanent magnets and the iron core are both symmetrical with respect to the axis of the iron core 40. Layout.

In order to enable the core 40 to swing, the gap between the two first side walls 1015 and the gap between the two second side walls 1025 constitute an integral part of the core stroke space; specifically, the The shape of the gap between the two first side walls 1015 matches the shape of the gap between the two second side walls 1025, and both have a fan ring opening 13 facing the permanent magnet mounting portion. On the outside of the fan annular opening 13, there is a swing gap 1066 between the ends of the first side wall 1015 and the second side wall 1025 and the corresponding permanent magnets, and the drive wing 403 of the iron core 40 can extend out of the fan annular opening 13. In addition, when the iron core 40 swings, the driving wing 403 can swing back and forth through the swing gap 1066. Specifically, the two ends of the swing gap 1066 are penetrated. After the permanent magnet is installed, the first side wall and the second side wall are connected to each other. The permanent magnets are not in contact, as shown in Figs. 12 and 13, in this way, the driving wing on the iron core 40 can extend out of the swing gap 1066, thereby increasing the swing amplitude of the iron core and achieving the purpose of increasing the amplitude. The fan annular opening 13 includes two, which are arranged symmetrically at 180° with respect to the axis of the first penetration portion.

As shown in FIG. 6, the first side wall and the second side wall constitute a supporting side wall, the supporting side wall, the first bottom plate and the second bottom plate form the coil winding part, and the first side wall and the second bottom plate form the coil winding part. Both side walls are opened in a V shape. Specifically, through two first circular notches 1013 on the first bottom plate, two second circular notches 1023 on the second bottom plate, and a first side wall 1015 connected to the first circular notches 1013, The second side wall 1025 connected with the second circular notch 1023 can wind the coil 20 on the motor support 10. Since there are two sets of bar magnets in the present invention, in order to match, the coils can be wound into two sets through the interval between the first baffle 1016 and the second baffle 1026, which are located in the first baffle 1016 and the second baffle respectively. Both sides of the board 1026.

When the central angles of the two first circular notches 1013 on the first bottom plate and the two second circular notches 1023 on the second bottom plate are smaller, the fan circular openings 13 on the first and second bottom plates become smaller. Larger, the greater the swing space provided for the iron core 40, so the iron core 40 has a greater amplitude; on the contrary, when the two first circular notches 1013 on the first bottom plate and the two second fans on the second bottom plate When the central angle of the annular gap 1023 is larger, the fan annular openings 13 on the first and second bottom plates are smaller, and the swing space provided for the iron core 40 is smaller, so the iron core 40 has a smaller amplitude. In the present invention, as a preferred embodiment, the central angles of the two first circular notches 1013 on the first bottom plate and the two second circular notches 1023 on the second bottom plate are 129 degrees.

In the present invention, as another preferred embodiment, the range of the included angle C of the V-shaped expansion of the first side wall meets 100°≤C<160°, or 120°≤C<140°.

In the present invention, both the first side wall and the second side wall are provided with a concave surface, and the concave surface is used to match the two first circular notches 1013 on the first bottom plate and the two second bottom plates. There are two annular gaps 1023, so that when the coil is wound, it can be distributed on the concave surface, and the concave surface can wind more coils.

In the present invention, the other side of the first bottom plate 1011 opposite to the first sink groove 1014 is provided with a first protrusion 1017, and the first penetration portion 1012 passes through the first protrusion 1017 The other side of the second bottom plate 1022 opposite to the second sink slot 1024 is provided with a second protruding post 1027, and the second penetrating portion 1021 passes through the second protruding post 1027. It should be noted that the first protrusion 1017 and the second protrusion 1027 are made of insulating materials. As a preferred way, one end of the mounting bracket is fixed to the upper cover, and the other end is fixed to the base, so as to limit the axial movement of the mounting bracket. The upper cover and the inner wall of the base may be provided with protruding bars so as to abut against the bottom plate of the mounting bracket. Or other designs. The main function of the protruding post is to prevent the shaft from touching and/or damaging the enameled wire, preventing the motor from being scrapped due to a short circuit, and being integrated with the motor bracket by injection molding, eliminating the need for additional insulating parts and simplifying the motor structure. As a preferred embodiment, the first baffle 1016 and the second baffle 1026 of the motor bracket 10 can be eliminated. Since there are two sets of bar magnets in the present invention, in order to match, the first protrusion 1017 and the second At the interval of the protruding pillars 1027, the coils are wound into two groups, which are respectively located on both sides of the first baffle 1016 and the second baffle 1026.

Referring to Figs. 13-15, the working principle of the present invention is that in the non-energized state, the permanent magnets have equal attraction to the iron core, so that the iron core and the shaft stay at the initial position. When in use, the coil alternately changes the direction and energizes. The two ends of the coil produce N pole and S pole, and act on the iron core. The iron core leaves the center position under the action of the permanent magnet, and rotates clockwise or counterclockwise, thus making the shaft The rod kept swinging.

It should be noted that, after the iron core and the shaft in the present invention are installed through the bearings, they do not contact the motor support, the shaft contacts the upper bearing and the lower bearing, and the iron core does not contact the supporting side wall.

The magnetic levitation sonic motor provided by the invention has simple structure, easy assembly, stable performance, good connection quality, consistency and reliability between the rotor assembly and the stator assembly, and can achieve wide amplitude while miniaturizing, which is more in line with market needs . The magnetic levitation sonic motor of the present invention does not need to be additionally provided with shrapnel, elastic needle or spring to fix the position of the shaft, simplifies the motor structure, and avoids that the elastic structure absorbs the torque of the main shaft when the main shaft rotates and causes the output power of the main shaft to weaken. The iron core may be a silicon steel body, and the iron core may be formed by stacking silicon steel sheets.

In the present invention, the first baffle 1016 and the second baffle 1026 on the motor support 10 abut against the flat inner wall of the upper cover 80, thereby restricting the radial movement of the motor support, so that the rotor assembly and the stator assembly of the motor are The indirect connection is of good quality, consistency and reliability.

The motor support provided by the present invention has a stable structure, can accurately and firmly install permanent magnets, defines the position of each magnet in the circumferential direction, increases the impact resistance of the magnet assembly, and is beneficial to improve the pass rate of the drop test. The mounting bracket has an upper and lower structure. , The permanent magnet can be installed on the first frame or the second frame first, and then the first frame and the second frame can be inserted, which can overcome the difficulty of assembly caused by the tolerance of the permanent magnet. In addition, the motor frame can be located in its internal space The rotor has a larger swing space, which can achieve wide amplitude while miniaturizing the motor. The motor bracket is made of insulating plastic, and the motor bracket is provided with a first convex post and a second convex post integrally formed by injection molding, which can prevent the shaft from touching and/or damaging the enameled wire, and prevent the motor from being scrapped due to a short circuit. And no additional insulating parts are needed, simplifying the motor structure. In addition, the coil is fixed on the mounting bracket to become a part of the stator assembly, and it can generate a magnetic field to drive the rotor to rotate after being directly energized. There is no coil on the rotor, no need to conduct current through the brush, and there is no coil friction, and the coil vibrates repeatedly. Causes problems such as breakage, no need for commutator or commutator, high conversion efficiency, fast speed, better performance, and longer overall motor life.

Of course, the foregoing embodiments are only preferred embodiments of the present invention. It can also be achieved by other equivalent structures, as long as it is ensured that there is an opening between the iron core accommodating portion and the swing gap, so that the iron core of the rotor can extend to the swing gap through the opening. For example, the vertical structure of the first frame and the second frame in the present invention is transformed into a left-right structure.

In addition, the present invention also provides an oral cleaning appliance, such as an electric toothbrush, which includes the aforementioned magnetic levitation sonic motor. During installation, the magnetic levitation sonic motor is located inside the housing of the electric toothbrush, and the shaft 50 is extended to connect with the brush head. Other structures of the electric toothbrush belong to the prior art in the field and will not be described in detail here.

In the description of this specification, reference is made to the description of the terms "one embodiment", "some embodiments", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. It means that the specific feature, structure, material or characteristic described in combination with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

The above content is a further detailed description of the present invention in combination with specific implementations, and it cannot be considered that the specific implementations of the present invention are limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

The motor support for mounting permanent magnets and coils is characterized in that a permanent magnet mounting part and a coil winding part are provided on the motor support, and a swing gap is provided between the permanent magnet mounting part and the coil winding part, the The motor bracket is also provided with an iron core accommodating part, and an opening is provided between the iron core accommodating part and the swing gap, so that the iron core can extend to the swing gap through the opening.
The motor support according to claim 1, wherein the motor support is further provided with a shaft accommodating portion for penetrating the shaft, and the coil winding portion includes the permanent magnet mounting portion and the permanent magnet mounting portion. A pair of supporting side walls used for winding coils between the shaft accommodating parts, wherein any one of the supporting side walls is opened in a V shape.
The motor support for mounting permanent magnets and coils according to claim 2, wherein the motor support comprises:

The first frame, the first frame is provided with a first penetration part;

A second frame, the second frame is provided with a second penetration part;

The first frame and the second frame are connected to each other so that the first penetration portion and the second penetration portion can be used to penetrate the shaft, and a part of the first frame is connected to A part of the second frame together constitutes the permanent magnet mounting part, and another part of the first frame and another part of the second frame together constitute the coil winding part;

When the first frame is relatively far away from the second frame, the permanent magnet mounting portion is enlarged for mounting and dismounting the permanent magnet;

When the first frame and the second frame are relatively close, the permanent magnet mounting portion is reduced in order to fasten the permanent magnet.
The motor support for mounting permanent magnets and coils according to claim 3, wherein the permanent magnet mounting portion includes four first sinks arranged on the first frame, and four first sinks The grooves are arranged in an annular shape relative to the shaft center of the shaft; the permanent magnet mounting portion further includes four second sink grooves arranged on the second frame, and the four second sink grooves are opposite to the shaft rod. The axis is arranged in a ring shape;

Any one of the first sink grooves on the first frame is matched with one of the second sink grooves on the second frame, and the matched one of the first sink grooves is matched with the one of the second sink grooves. The sink groove is arranged in a direction parallel to the axis of the shaft.
The motor support for installing permanent magnets and coils according to any one of claims 2-4, wherein the opening angle C of the V-shaped supporting side wall conforms to 90°≤C<180°.
The motor support for mounting permanent magnets and coils according to claim 3, wherein the first frame comprises a first bottom plate, and the first bottom plate is provided with two symmetrical arrangement with respect to the axis of the shaft. The first ring-shaped notch, the first bottom plate is provided with four first sink grooves arranged symmetrically with respect to the axis of the shaft on the same side, and the supporting side wall includes the first bottom plate located on the same side. Two first side walls spaced apart on one side of the first sinking groove extending along the axis of the shaft, and plug pins are provided on the upper ends of the two first side walls;

The second frame includes a second bottom plate, the second bottom plate is provided with two second circular notches arranged symmetrically with respect to the axis of the shaft, and the second bottom plate is located on the same side and is provided with the opposite Four second sink grooves arranged axially symmetrically, the supporting side wall includes two spaced apart two sink grooves on the second bottom plate located on one side of the second sink groove and extending along the axial direction of the shaft. Two second side walls, both upper ends of the two second side walls are provided with connecting holes for the insertion of the plug pins;

The first penetration portion is provided on the first bottom plate, and the second penetration portion is provided on the second bottom plate;

The first sink groove and the second sink groove are matched to form the permanent magnet mounting part;

The first side wall, the second side wall, the first bottom plate and the second bottom plate form the coil winding part.
The motor support for mounting permanent magnets and coils according to claim 6, wherein the other side of the first base plate opposite to the first sink is provided with a first protruding column; A second protruding column is provided on the other side of the second bottom plate opposite to the sink groove.
A magnetic levitation sonic motor, characterized by comprising the motor support for mounting permanent magnets and coils according to any one of claims 1-8, the motor support is mounted with coils, permanent magnets, and also includes an iron core, a shaft, and a bearing And the housing, the iron core is fixedly installed on the shaft; the shaft passes through the first penetration in the permanent magnet and coil motor bracket according to any one of claims 1-9 The part and the second penetrating part are fixedly connected with the housing through a bearing.
The magnetic levitation acoustic wave motor according to claim 8, wherein the iron core is an I-shaped iron core, a shaft connecting hole is provided in the middle of the iron core for the shaft to pass through, and the iron core further comprises The supporting walls are located on both sides of the shaft connecting hole and are arranged symmetrically in a line, and the end of the supporting wall is connected with the driving wing.
An oral cleaning appliance characterized by comprising the magnetic levitation sonic motor according to claim 8 or 9.