WO2018028106A1

WO2018028106A1 - Bipolar magnetic levitation motor

Info

Publication number: WO2018028106A1
Application number: PCT/CN2016/110571
Authority: WO
Inventors: 张立武
Original assignee: 张立武
Priority date: 2016-08-12
Filing date: 2016-12-17
Publication date: 2018-02-15
Also published as: CN205864218U

Abstract

A bipolar magnetic levitation motor, comprising a swing shaft (100), a left pole frame (300), and a right pole frame (400); a coil rotor (800) is provided inside the left pole frame and the right pole frame; two permanent magnets (500) are provided between the coil rotor and the left pole frame and between the coil rotor and the right pole frame, respectively; bearings (200) are sleeved on the front end and on the rear end of the swing shaft, respectively; the outer side of the left pole frame and the outer side of the right pole frame is provided with a magnetism shielding piece (600), respectively; both ends of the inner side of the left pole frame and the right pole frame are provided with a bearing groove (402) for mounting the bearings; both ends of the inner side of the right pole frame are provided with two positioning columns (401); both ends of the inner side of the left pole frame are provided with two positioning holes matching the positioning columns; the left pole frame and the right pole frame are detachably connected by means of a fastening member (700). The motor has the advantages of being small in volume, having large output power and wide vibration frequency, reducing wear and noise, being capable of automatically recovering and automatically keeping balance, and being easy to assemble and low in cost.

Description

Bipolar magnetic suspension motor

Technical field

The utility model relates to a motor for an electric toothbrush, in particular to a bipolar magnetic suspension motor.

Background technique

With the improvement of consumers' living standards, electric toothbrushes are becoming the best tool for consumers to care for their teeth. Commercially available electric toothbrushes are mostly composed of traditional motors and vibrating rings due to cost reasons. The disadvantages are: vibration is not strong enough, working Frequency instability, the amplitude and frequency of the vibration fluctuate with the voltage of the battery. Although a special vibration motor has appeared on the market, the structure is complicated, the cost is high, the reliability is poor, and manual adjustment is required in production, and consistency is difficult to ensure, so it is not suitable for mass promotion.

In order to solve the above problems, the patent name of the applicant filed with the Patent Office on September 3, 2013 is “a vibrating motor for electric toothbrushes”, the patent application number is “2013205433024”, and the announcement date is “June 25, 2014”. The utility model patent mainly comprises a casing, a back cover, a rotating shaft, four permanent magnets, an inductor coil rotor, a left bracket and a right bracket, wherein: the inductor coil rotor is hinged with the shaft rod, and the four permanent magnets respectively Mounted in the left bracket and the right bracket inner cavity, the inductor coil rotor is surrounded by a left bracket, a right bracket and a permanent magnet, and an output rear end and a rear cover of the shaft rod are positioned by a spring positioning pin; The first coaxial ring is provided with a first groove ring, and the first bearing is mounted in the first groove ring, and the front end of the outer casing is symmetrically disposed with two for fixing the left and right brackets. a screw hole, the rear cover is provided with a second groove ring, and the second bearing is installed in the second groove ring, in the shaft The first bearing is mounted on the first bearing, the first bearing and the second bearing are mounted with an inductor coil rotor, the rear portion of the shaft is mounted on the second bearing; and the first through hole is provided at both ends of the back cover. The first through hole is coaxially disposed with the second through hole at the rear end of the rotating shaft, the rear cover is coaxial with the rotating shaft, and the spring positioning pin is inserted into the first through hole and the second through hole. Although the vibration motor solves the traditional vibration motor to optimize the structure to a certain extent, reduce the cost and improve the reliability, it still needs to use springs, positioning pins, shrapnel, steel needles and other elastic components to ensure the balance and reset of the motor. Performance, it still needs manual adjustment in the production process, consistency is still difficult to guarantee, not suitable for mass promotion; on the other hand, its motor is large in size and the structure is still relatively complicated.

Utility model content

The utility model provides a bipolar magnetic suspension motor with small volume, large output power, wide vibration frequency, small wear, low noise, automatic reset, automatic balance, simple assembly and low manufacturing cost.

The utility model can be realized by the following technical solutions:

A bipolar magnetic suspension motor comprising a rocking shaft, a left magnetic pole skeleton, a right magnetic pole skeleton, a coil rotor, four permanent magnets and two bearings, wherein the left magnetic pole skeleton and the right magnetic pole skeleton are hollow designs, and the coil rotor Located in the left magnetic pole skeleton and the right magnetic pole skeleton, two permanent magnets are respectively disposed between the coil rotor and the left magnetic pole bobbin and the right magnetic pole bobbin, and the swinging shaft rod penetrates the coil rotor, and the front end and the tail end of the swinging shaft rod The ends are respectively sleeved with bearings, and the outer sides of the left magnetic pole skeleton and the right magnetic pole bobbin are respectively provided with magnetic shielding sheets, and the inner ends of the left magnetic pole bobbin and the right magnetic pole bobbin are respectively provided with bearing grooves for mounting bearings, the right Two positions on both inner sides of the magnetic pole frame The column has two positioning holes matched with the positioning post at the inner ends of the left magnetic pole frame, and the left magnetic pole skeleton and the right magnetic pole skeleton are detachably connected by a fastener. The bipolar magnetic suspension motor of the utility model is provided with a bearing groove for mounting a bearing at both inner ends of the left magnetic pole skeleton and the right magnetic pole skeleton, and the left magnetic pole skeleton and the right magnetic pole skeleton are detachably fixedly connected by a fastener, and at the same time A magnetic shielding piece is respectively disposed on the outer sides of the left magnetic pole skeleton and the right magnetic pole skeleton, and on the one hand, the balance positioning members such as the spring and the positioning pin are reduced, so that the coil rotor in the bipolar magnetic suspension motor is fixed only by the bearing as a support point, within the rotation angle It can rotate synchronously with the magnetic field, its synchronous rotation and wear is small, the noise is small, and the coil rotor rotates synchronously with the magneto-acoustic to reach the magnetic suspension state, which effectively increases the balance degree of the coil rotor in the magnetic suspension state, so that the motor can maintain the balance of the rocking shaft and Automatic reset, with automatic balance and reset function, and further widening the working frequency band of the coil rotor, can output higher mechanical vibration; on the other hand, the setting of the shielding piece effectively replaces the shielding magnetic field of the prior art. , effectively reducing the outer casing and the tail cover, making the motor structure more compact, under the same output power Smaller, easier to assemble, effectively reducing the manufacturing cost; the left pole and a right pole backbone skeleton frame detachably fixedly connected by fasteners, to facilitate disassembly.

Further, the outer sides of the left magnetic pole skeleton and the right magnetic pole skeleton are respectively provided with rectangular recesses, and the four permanent magnets are respectively installed in the rectangular recesses on the left magnetic pole skeleton and the right magnetic pole skeleton, and the permanent magnets are fixed in the rectangular recesses. Fixed and stable.

Further, the coil rotor is a double pole coil rotor, comprising a 矽 steel core and an enameled wire, wherein the middle of the 矽 steel core is a ring design, and both ends of the 矽 steel core are provided with a baffle, the ring and the block A winding groove for winding the enamel wire is formed between the plates.

Further, the permanent magnet is a rare earth neodymium iron boron magnet. The rare earth neodymium iron boron magnet is not only cost-effective, but also has good mechanical properties. It has the characteristics of small volume, light weight and strong magnetic properties. The permanent magnet is made of rare earth neodymium boron magnet, which can balance the magnetic suspension state of the coil rotor. The motor balance is no longer required for the motor balance, and the positioning pin positioning is not required, so that the swing motor realizes the functions of automatic reset and automatic balance.

Further, the permanent magnet has a rectangular parallelepiped shape, and both ends of the permanent magnet are provided with an L-shaped positioning port, and the left magnetic pole skeleton and the right magnetic pole skeleton are respectively provided with an L-shaped positioning matched with the L-shaped positioning opening. Piece. The L-shaped positioning port at both ends of the permanent magnet and the L-shaped positioning block on the left magnetic pole skeleton and the right magnetic pole skeleton ensure the positioning of the permanent magnet is stable.

Further, the front end of the swinging shaft is provided with a toothbrush mounting head, and the rear end is provided with a positioning groove and an anti-overturning groove. Further, the fastener is a fastening screw.

Further, the magnetic shielding sheets are made of a magnetically permeable material to effectively shield the magnetic field.

The bipolar magnetic suspension motor of the utility model has the following beneficial effects:

First, the assembly is simple and the manufacturing cost is low. The bipolar magnetic suspension motor of the present invention is provided with a bearing groove for mounting a bearing at the inner ends of the left magnetic pole skeleton and the right magnetic pole skeleton, and the left magnetic pole skeleton and the right by a fastener The magnetic pole skeleton is detachably fixedly connected, and a magnetic shielding sheet is respectively disposed on the outer side of the left magnetic pole bobbin and the right magnetic pole bobbin, and the components thereof are less in composition, the assembly is easier, and the manufacturing cost is low;

Secondly, the wear is small and the noise is small. The bipolar magnetic suspension motor of the present invention has a bearing groove for mounting a bearing at the inner ends of the left magnetic pole skeleton and the right magnetic pole skeleton to make the bipolar magnetic The coil rotor in the suspension motor is fixed only by the bearing as the support point, which effectively reduces the balance positioning parts such as the spring and the positioning pin. In the rotation angle, the coil rotor can rotate synchronously with the magnetic field, and the synchronous rotation wear is small and the noise is small;

Third, with automatic balance and automatic reset function, the coil rotor rotates synchronously with the magneto-acoustic to reach the magnetic suspension state, which effectively increases the balance degree of the coil rotor in the magnetic suspension state, and has an automatic balance and reset function;

Fourth, the working frequency is high, the output power is large, and the coil rotor rotates synchronously with the magneto-acoustic to reach the magnetic suspension state, so that the working frequency band of the coil rotor is further widened, and higher mechanical vibration can be output;

Fifth, the motor structure is more compact, the volume is smaller, and the setting of the magnetic shielding piece effectively replaces the shielding magnetic field of the outer casing in the prior art, effectively reducing the outer casing and the tail cover, making the motor structure more compact, and at the same output power, Smaller size, easier assembly, and lower manufacturing costs;

Sixth, the disassembly and assembly is convenient, and the left magnetic pole frame and the right magnetic pole frame are detachably fixedly connected by fasteners, and the disassembly and assembly are convenient.

DRAWINGS

1 is an exploded perspective view of a bipolar magnetic suspension motor of the present invention;

Figure 2 is a schematic view of the assembly of the bipolar magnetic suspension motor of the present invention;

Figure 3 is a second schematic view of the assembly of the bipolar magnetic suspension motor of the present invention;

4 is a schematic cross-sectional view of a dual pole magnetic coil rotor of a bipolar magnetic suspension motor in a static state in a static state;

Figure 5 is a cross-sectional view of the double pole coil rotor of the bipolar magnetic suspension motor in the energized state of the present invention Schematic diagram

6 is a schematic cross-sectional view of a dual pole coil rotor of a bipolar magnetic suspension motor in a reverse energized state;

Figure 7 is a schematic view showing the monolithic structure of the bifurcated steel core of the bipolar magnetic suspension motor of the present invention;

8 is a structural schematic view of a coil rotor of a bipolar magnetic suspension motor mounted on a rocking shaft in the present invention.

detailed description

In order to enable a person skilled in the art to better understand the technical solution of the present invention, the product of the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 8, a bipolar magnetic suspension motor includes a rocking shaft 100, a left magnetic pole skeleton 300, a right magnetic pole skeleton 400, a coil rotor 800, four permanent magnets 500 and two. Bearings 200, the left magnetic pole frame 300 and the right magnetic pole frame 400 are hollow designs, the coil rotor 800 is located in the left magnetic pole frame 300 and the right magnetic pole frame 400, the coil rotor 800 and the left magnetic pole frame 300 and the right magnetic pole skeleton Two permanent magnets 500 are respectively disposed between the 400, and the outer sides of the left magnetic pole frame 300 and the right magnetic pole frame 400 are respectively provided with rectangular grooves 403, and the four permanent magnets 500 are respectively mounted on the left magnetic pole frame 300 and the right magnetic pole frame 400. In the rectangular recess 403, the permanent magnet 500 is fixed in the rectangular recess 403 and is fixedly fixed. The rocking shaft 100 penetrates the coil rotor 800. The rocking shaft 100 is made of stainless steel. The front end and the tail end of the rocking shaft 100 are respectively sleeved with bearings 200, and the bearings 200 are respectively located at both ends of the coil rotor 800. On the outer side, the front end of the swinging shaft 100 is provided with a toothbrush mounting head 101, and the tail end is provided. There are a positioning groove 102 and an anti-overturning groove 103. The outer side of the left magnetic pole frame 300 and the right magnetic pole frame 400 are respectively provided with a magnetic shielding sheet 600 for preventing magnetic leakage and improving magnetic field efficiency. The magnetic shielding sheets 600 are all made of a magnetic conductive material, effectively shielding the magnetic field and shortening the two The magnetic path between the permanent magnets 500 further strengthens the magnetic field between the magnetic poles. The inner end of the left magnetic pole frame 300 and the right magnetic pole frame 400 are respectively provided with a bearing groove 402 for mounting the bearing 200, and two inner sides of the right magnetic pole frame 400 are provided with two positioning posts 401, and the left magnetic pole skeleton Two positioning holes are formed at the inner ends of the 300, and the positioning holes and the positioning posts 401 respectively disposed on the inner ends of the left magnetic pole frame 300 and the right magnetic pole frame 400 are combined with each other to function as a left magnetic pole frame 300 and The initial fixing action of the right magnetic pole bobbin 400, the left magnetic pole bobbin 300 and the right magnetic pole bobbin 400 are detachably connected by a fastener 700 that fastens the left magnetic pole bobbin 300 and the right magnetic pole bobbin 400 together, The fastener 700 is a fastening screw. The bipolar magnetic suspension motor of the present invention provides a bearing groove 402 for mounting the bearing 200 at the inner ends of the left magnetic pole frame 300 and the right magnetic pole frame 400, and the left magnetic pole frame 300 and the right magnetic pole frame 400 are fastened by the fastener 700. The detachable fixed connection is provided with a magnetic shielding sheet 600 for preventing magnetic leakage and improving magnetic field efficiency on the outer side of the left magnetic pole bobbin 300 and the right magnetic pole bobbin 400, and on the one hand, the balance positioning member such as the spring and the positioning pin is reduced, so that the double The coil rotor 800 in the polar magnetic levitation motor is fixed only by the bearing 200 as a supporting point. In the rotation angle, it can rotate synchronously with the magnetic field, the synchronous rotating wear is small, the noise is small, and the coil rotor 800 rotates synchronously with the magnetoacoustic to reach the magnetic levitation state. The balance of the coil rotor 800 in the magnetic suspension state is effectively increased, so that the motor can maintain the balance and automatic reset of the swing shaft 100, and has an automatic balance and reset function, and the working frequency band of the coil rotor 800 is advanced. One step widening can output higher mechanical vibration; on the other hand, the setting of the magnetic shielding sheet 600 effectively replaces the shielding magnetic field of the prior art, effectively reducing the outer casing and the tail cover, and making the motor structure more compact and identical. Under the output power, the volume is smaller, the assembly is easier, and the manufacturing cost is effectively reduced; the left magnetic pole frame 300 frame and the right magnetic pole frame 400 are detachably fixedly connected by the fastener 700, and the disassembly and assembly is convenient.

As shown in FIG. 1 , FIG. 2 and FIG. 7 , the coil rotor 800 is a double pole coil rotor, including an enameled wire 801 and a steel core 802. The middle of the core 802 is designed as a ring 803, and the core 802 is A baffle 804 is disposed at both ends, and a winding groove 805 for winding the enameled wire 801 is formed between the ring 803 and the baffle 804. The steel core 802 is installed in the middle of the swinging shaft 100, and the enameled wire 801 is wound in series around the winding groove 805 on both sides of the ring 803 of the 矽 steel core 802, and the starting end and the end of the winding of the enamel wire 801 are wound around the positioning bone 405 on the left magnetic pole frame 300 and the right magnetic pole frame 400, respectively. Finally soldered to the control board.

As shown in FIG. 1, the permanent magnet 500 is a rare earth neodymium iron boron magnet. The rare earth neodymium iron boron magnet is not only cost-effective, but also has good mechanical properties. Moreover, it has the characteristics of small volume, light weight and strong magnetic properties. The permanent magnet 500 is made of rare earth neodymium boron magnet, which can have the shovel enhanced coil rotor 800 in the state of magnetic suspension. Balance, so that the motor balance no longer requires a spring, and does not require positioning pin positioning, so that the swing motor achieves automatic reset and automatic balance.

As shown in FIG. 1 , the permanent magnet 500 has a rectangular parallelepiped shape, and both ends of the permanent magnet 500 are provided with an L-shaped positioning port 501 , and the left magnetic pole frame 300 and the right magnetic pole frame 400 are respectively provided with an L shape. The positioning port 501 is matched with the L-shaped positioning block 404. L-shaped positioning port 501 at both ends of permanent magnet 500 And the arrangement of the L-shaped positioning block 404 on the left magnetic pole frame 300 and the right magnetic pole frame 400 effectively ensures the positioning of the permanent magnet 500 is stable, and the outer sides of the left magnetic pole frame 300 and the right magnetic pole frame 400 are respectively provided for preventing magnetic leakage and improving magnetic field efficiency. The magnetic shielding sheet 600 effectively prevents magnetic leakage and improves magnetic field efficiency.

As shown in the schematic diagram of the static state of the motor in Fig. 4, since the double pole coil rotor 800 has not been switched on, that is, no electromagnetic field has been generated, in this case, the double pole coil rotor 800 is produced by the permanent magnet 500. The magnetic field is attracted so that the double pole coil rotor 800 remains at the initial position.

As shown in the cross-sectional view of the dual-pole coil rotor in the energized state of Fig. 5, in this dynamic, since the double-pole coil rotor 800 has been turned on, the two pole coil rotors respectively generate strong and different magnetic polarities, according to magnet homogeneity. The principle of attracting the opposite polarity repels the principle that the double pole coil rotor 800 swings under the magnetic force of the permanent magnet 500 in the left magnetic pole bobbin 300 and the right magnetic pole bobbin 400.

As shown in the cross-sectional schematic diagram of the double-pole coil rotor in the reverse energization state, the control board controls the current direction of the double-pole coil rotor 800 to be reversely turned on, so that the magnetic polarity at both ends of the double-pole coil rotor 800 is exchanged. The pole coil rotor 800 generates a reverse swing under the action of the magnetic force of the permanent magnet 500.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any form; those skilled in the art can smoothly implement the invention as shown in the drawings and described above. The utility model; however, those skilled in the art are not taking off The equivalent changes of the modifications, modifications and evolutions that can be made using the technical content disclosed above are all equivalent embodiments of the present invention within the scope of the technical solutions of the present invention. Meanwhile, all the embodiments according to the present invention are Modifications, modifications, and evolutions of any equivalent changes made by the above-described embodiments to the above embodiments are still within the scope of protection of the technical solutions of the present invention.

Claims

A bipolar magnetic suspension motor comprising a rocking shaft, a left magnetic pole skeleton, a right magnetic pole skeleton, a coil rotor, four permanent magnets and two bearings, wherein the left magnetic pole skeleton and the right magnetic pole skeleton are hollow designs, and the coil rotor Located in the left magnetic pole skeleton and the right magnetic pole skeleton, two permanent magnets are respectively disposed between the coil rotor and the left magnetic pole bobbin and the right magnetic pole bobbin, and the swinging shaft rod penetrates the coil rotor, and the front end and the tail end of the swinging shaft rod The ends are respectively sleeved with bearings, wherein: the outer side of the left magnetic pole frame and the right magnetic pole frame are respectively provided with a magnetic shielding piece, and the inner ends of the left magnetic pole frame and the right magnetic pole frame are respectively provided with bearing grooves for mounting bearings. Two positioning posts are disposed at two inner ends of the right magnetic pole frame, and two inner side ends of the left magnetic pole frame are provided with two positioning holes that cooperate with the positioning post, and the left magnetic pole skeleton and the right magnetic pole skeleton pass through tightly The firmware is detachable.
The bipolar magnetic suspension motor according to claim 1, wherein each of the left magnetic pole skeleton and the right magnetic pole skeleton is provided with a rectangular groove, and the four permanent magnets are respectively mounted on the left magnetic pole skeleton and the right magnetic pole skeleton. Inside the rectangular groove.
The bipolar magnetic levitation motor according to claim 2, wherein the coil rotor is a double pole coil rotor, comprising a 矽 steel core and an enameled wire, wherein the middle of the 矽 steel core is a ring design, and the 矽 steel core is two The ends are each provided with a baffle, and a winding groove for winding the enamel wire is formed between the ring and the baffle.
The bipolar magnetic suspension motor according to claim 3, wherein the permanent magnet is a rare earth neodymium iron boron magnet.
The bipolar magnetic suspension motor according to claim 4, wherein the permanent magnet has a rectangular parallelepiped shape, and both ends of the permanent magnet are provided with an L-shaped positioning port, and the left magnetic pole skeleton And the right magnetic pole skeleton is provided with an L-shaped positioning block matched with the L-shaped positioning opening.
The bipolar magnetic suspension motor according to claim 5, wherein the front end of the swinging shaft is provided with a toothbrush mounting head, and the rear end is provided with a positioning groove and an anti-overturning groove.
A bipolar magnetic suspension motor according to claim 6, wherein said fastener is a fastening screw.
The bipolar magnetic suspension motor according to claim 7, wherein the magnetic shielding sheets are each made of a magnetically permeable material.