Magnetic suspension motor

Abstract

The utility model provides a magnetic suspension motor. The magnetic suspension motor comprises an outer support, a pre-assembled stator coil assembly, a mounting seat, a swing seat and an elastic sheet, the stator coil assembly is installed on the installation seat, the swing seat is further provided with a magnet and a driving rod, after electrification, the magnetic field direction of the stator coil assembly is switched, the swing seat with the magnet is driven to reciprocate, and then the driving rod is driven to move; the outer support is arranged outside the swing base, the installation base and the stator coil assembly in a sleeving mode and fixedly connected with the installation base and the stator coil assembly. The motor is divided into three modules, the outer support serves as the first module, the pre-assembled stator coil assembly serves as the second module, the installation base, the swing base and the elastic piece which are integrally formed serve as the third module, during assembly, the three modules only need to be simply installed and then fixedly connected, assembly can be completed, assembly is simple, and production efficiency is greatly improved; moreover, the motor is a brushless magnetic suspension vibration motor, and is reliable, high in rigidity, and small in noise and vibration.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a magnetic levitation motor. Background Art

[0002] In electric personal care devices such as shavers and electric hair clippers, the blades need to perform high-frequency reciprocating motion, and this process needs to be completed with the help of a motor and a transmission structure; in the prior art, the commonly used transmission structure is usually that the motor drives an eccentric wheel to rotate at a high speed, and the eccentric wheel is connected to the end of the tool holder, so as to realize the high-frequency reciprocating motion of the blade. However, this technology has technical problems such as large wear and large volume.

[0003] In order to solve the above technical problems, manufacturers have designed a brushless magnetic levitation motor. After this motor is powered on, the coil assembly generates a magnetic field and continuously changes the direction of the magnetic field, thereby driving a swing seat with the ability to return to the original position to swing. The swing seat drives the blade to move through a driving rod. There is a magnet in the swing seat, and the magnetic field switches between the positive and negative directions in turn. When affected by the positive magnetic field, the swing seat swings in one direction. When the positive magnetic field ends and becomes a negative magnetic field, the swing seat immediately returns to the original position and continues to swing in the opposite direction. When it is switched to the positive magnetic field again, the swing seat swings in the first direction again, and swings back and forth continuously in turn to complete the work.

[0004] Although this type of motor reduces wear and has a smaller volume, its production and assembly are more complex and the production efficiency is lower; the main reason is that although this type of motor reduces the volume, the number of internal parts is still large, and the parts have become smaller, making the assembly more difficult. At the same time, the assembly process is numerous, thereby reducing the production efficiency. Summary of the Invention

[0005] In order to solve the above technical problems, the utility model provides a magnetic levitation motor, which includes an outer bracket, a pre-assembled stator coil assembly, and an integrally formed mounting seat, swing seat and elastic sheet; the stator coil assembly is installed on the mounting seat, and there are also a magnet and a driving rod on the swing seat. After being powered on, the direction of the magnetic field of the stator coil assembly is switched, driving the swing seat with the magnet to reciprocate, thereby driving the driving rod to move; the outer bracket is sleeved outside the swing seat, mounting seat and stator coil assembly, and is fixedly connected to the mounting seat and stator coil assembly; in this solution, the motor is mainly divided into three modules. The outer bracket is the first module, the pre-assembled stator coil assembly is the second module, and the integrally formed mounting seat, swing seat and elastic sheet are the third module. During production and assembly, only the three modules need to be simply installed and then fixedly connected to complete the assembly. The assembly is simple, greatly improving the production efficiency; moreover, this motor is a brushless magnetic levitation vibration motor, with reliable products, strong rigidity, low noise and vibration, and is more suitable for electric personal care devices such as shavers and electric hair clippers.

[0006] The technical solution of the utility model is realized as follows:

[0007] A magnetic levitation motor includes a mounting base, a swinging base, a spring piece, an outer bracket and a stator coil assembly. The swinging base and the mounting base are arranged at an interval up and down, and the swinging base is located above the mounting base. The spring piece is arranged between the swinging base and the mounting base, and the spring pieces are provided at both the left and right ends of the swinging base and the mounting base. The mounting base, the swinging base and the spring piece are integrally formed; the stator coil assembly is mounted on the mounting base. A magnet and a driving rod are further provided on the swinging base. The stator coil assembly and the magnet are configured to energize the stator coil assembly to drive the swinging base to swing relative to the mounting base, and maintain the swinging path under the action of the spring piece, thereby driving the driving rod to move; the outer bracket is sleeved outside the swinging base, the mounting base and the stator coil assembly, and is fixedly connected to the mounting base and the stator coil assembly.

[0008] In this solution, the motor is mainly divided into three modules. The outer bracket is the first module, the pre-assembled stator coil assembly is the second module, and the integrally formed mounting base, swinging base and spring piece are the third module. During production and assembly, only the three modules need to be simply installed and then fixedly connected to complete the assembly. The assembly is simple, which greatly improves the production efficiency; after being powered on, the magnetic field direction of the stator coil assembly is switched, driving the swinging base with a magnet to reciprocate, and then driving the driving rod to move. The driving rod is connected to moving parts such as blades to achieve the work. Therefore, this motor is a brushless magnetic levitation vibration motor. Compared with traditional products, the product is reliable, has strong rigidity, less noise and vibration, and is more suitable for electric personal care devices such as shavers and electric hair clippers.

[0009] Preferably, the mounting base and the swinging base are injection-molded, and the upper end portion of the spring piece is injection-molded together when the swinging base is injection-molded, and the lower end portion of the spring piece is injection-molded together when the mounting base is injection-molded. For the module composed of the mounting base, the swinging base and the spring piece, pre-production is realized according to this solution, and the spring piece is injection-molded together with the mounting base and the swinging base, without further assembly and fixed connection. Moreover, the fasteners in the prior art are small in volume and large in number, so the assembly is inconvenient and difficult. This solution solves these problems and greatly reduces the complexity of production and assembly.

[0010] Preferably, special-shaped holes are formed in both the upper end portion and the lower end portion of the spring piece. During injection molding, the mounting base and the swinging base will fill these special-shaped holes, making the connection between the mounting base, the swinging base and the spring piece more stable and reliable, and improving the reliability of the product.

[0011] Preferably, a swinging extension seat protrudes upward from the swinging base. The swinging extension seat protrudes upward from the swinging base, and the driving rod is inserted into the swinging extension seat; a window is formed in the outer bracket, and the swinging extension seat and the driving rod extend out of the outer bracket through the window. The swinging extension seat and the driving rod extend out of the outer bracket, enabling the driving rod to connect moving parts, thereby realizing the function of the device.

[0012] Preferably, the outer bracket is provided with upwardly protruding retaining seats on the left and right sides of the window, and a return spring is provided between each retaining seat and the swinging extension seat. The return spring can quickly return the driving rod to its original position and cause it to move in the other direction.

[0013] Preferably, the outer bracket includes a seat portion, a front retaining portion, and a rear retaining portion. The front retaining portion and the rear retaining portion are arranged at intervals in the front-rear direction, and both the front retaining portion and the rear retaining portion are provided on the lower surface of the seat portion and extend downward; the swinging seat, the mounting seat, and the stator coil assembly are all located between the front retaining portion and the rear retaining portion.

[0014] Preferably, the seat portion, the front retaining portion, and the rear retaining portion are integrally formed. That is, the outer bracket is integrally formed, and there is no need for assembly and fixation between the seat portion, the front retaining portion, and the rear retaining portion, further simplifying the production assembly and improving the production efficiency.

[0015] Preferably, a vertical slot is provided in the middle of the elastic piece. The slot does not penetrate the upper and lower ends of the elastic piece, and the upper and lower end portions of the elastic piece can be used to connect the swinging portion and the fixed portion; the existence of the slot is beneficial to deformation while reducing the noise generated by deformation.

[0016] The design concept, idea, and beneficial effects of the present utility model adopting the above technical solutions are as follows:

[0017] In this solution, the motor is mainly divided into three modules. The outer bracket is the first module, the pre-assembled stator coil assembly is the second module, and the integrally formed mounting seat, swinging seat, and elastic piece are the third module. During production and assembly, only the three modules need to be simply installed and then fixedly connected to complete the assembly. The assembly is simple, greatly improving the production efficiency; after being powered on, the magnetic field direction of the stator coil assembly is switched, driving the swinging seat with a magnet to reciprocate, and then driving the driving rod to move. The driving rod is connected to moving components such as a blade to achieve the work. Therefore, this motor is a brushless magnetic levitation vibration motor. Compared with traditional products, the product is reliable, has strong rigidity, less noise and vibration, and is more suitable for use in electric personal care devices such as shavers and hair clippers.

[0018] The present utility model has the following advantages compared with the motor with a double swinging rod structure:

[0019] The motor with a double swinging rod structure correspondingly has two swinging seats. When the two swinging rods move, the two swinging rods move reciprocally in a staggered manner, causing the movements of the two swinging rods to restrict each other, and both the power and the driving force will be affected; the two sets of connecting rods between the two swinging rods in the double swinging rod structure have mechanical friction during operation, thereby causing wear; when the wear reaches a certain level, the frictional force increases accordingly, reducing the driving force given by the motor to the swinging rod, and increasing the power consumption.

[0020] The single pendulum motor structure of a single swing seat has no connecting rod and no mechanical friction, so there is no wear. Therefore, the power is more direct, the driving force is stronger, the power consumption is lower, and the service life of the motor will increase exponentially. Brief Description of the Drawings

[0021] Figure 1 It is a schematic three-dimensional structure diagram of the motor in the embodiment of the present invention;

[0022] Figure 2 It is an exploded view of the motor in the embodiment of the present invention;

[0023] Figure 3 It is a schematic three-dimensional structure diagram of the magnet mounting plate arranged on the swing seat in the embodiment of the present invention;

[0024] Figure 4 It is a front view of the stator coil assembly mounted on the mounting seat in the embodiment of the present invention;

[0025] Figure 5 It is a schematic three-dimensional structure diagram of the swing frame in the embodiment of the present invention;

[0026] Figure 6 It is a schematic three-dimensional structure diagram of the outer bracket in the embodiment of the present invention;

[0027] Figure 7 It is a schematic three-dimensional structure diagram when the outer bracket and the swing frame are combined in the embodiment of the present invention;

[0028] Figure 8 It is a schematic three-dimensional structure diagram of the elastic piece in the embodiment of the present invention.

[0029] Each reference numeral is: mounting seat 1; swing seat 2; elastic piece 3; outer bracket 4; stator coil assembly 5; magnet mounting plate 6; drive rod 7; swing frame 8; swing extension seat 9; special-shaped hole 10; vertical groove 11; seat part 13; front blocking part 14; rear blocking part 15; window 16; blocking seat 17; return spring 18; stator coil fixing seat 19; mounting groove 20; positioning protrusion 21; magnet 22. Detailed Embodiment

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0031] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may be practiced in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.

[0032] In the description of the present utility model, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] The specific embodiments of the present utility model are as follows:

[0034] The existing reciprocating swing type maglev motor in the market adopts a double swing rod structure. Under the action of the magnetic induction coil, the two swing rods move in a staggered reciprocating manner. Two sets of connecting rods are used to connect the two swing rods to play a role of mutual assistance.

[0035] As Figure 1 、 2 shown, the present utility model provides a maglev motor, which includes a mounting seat 1, a swing seat 2, a spring piece 3, an outer bracket 4, and a stator coil assembly 5. The swing seat 2 and the mounting seat 1 are arranged at an interval up and down, and the swing seat 2 is located above the mounting seat 1. The spring piece 3 is arranged between the swing seat 2 and the mounting seat 1, and the spring piece 3 is provided at both the left and right ends of the swing seat 2 and the mounting seat 1. The mounting seat 1, the swing seat 2, and the spring piece 3 are integrally formed. The stator coil assembly 5 is installed on the mounting seat 1. A magnet 22 (not shown in the drawings of Embodiment 1) and a driving rod 7 are further provided on the swing seat 2. The magnet 22 is installed on the swing seat 2 through a magnet mounting plate 6. A magnet mounting plate 6 is fixedly connected below the swing seat 2, and two magnets 22 arranged at an interval left and right are installed on the magnet mounting plate 6. The stator coil assembly 5 and the magnet 22 are configured to energize the stator coil assembly 5 to drive the swing seat 2 to swing relative to the mounting seat 1 and maintain the swing path under the action of the spring piece 3, so as to drive the driving rod 7 to move. The outer bracket 4 is sleeved outside the swing seat 2, the mounting seat 1, and the stator coil assembly 5 and is fixedly connected to the mounting seat 1 and the stator coil assembly 5.

[0036] In this solution, the motor is mainly divided into three modules. The outer bracket 4 is the first module, the pre-assembled stator coil assembly 5 is the second module, and the integrally formed mounting base 1, swing seat 2 and elastic piece 3 are the third module. During production and assembly, only by simply installing the three modules and then fixedly connecting them can the assembly be completed. The assembly is simple, which greatly improves the production efficiency. After being powered on, the magnetic field direction of the stator coil assembly 5 switches, driving the swing seat 2 with a magnet 22 to reciprocate, and then driving the driving rod 7 to move. The driving rod 7 is connected to moving parts such as blades to achieve work. Therefore, this motor is a brushless magnetic levitation vibration motor. Compared with traditional products, the product is reliable, has strong rigidity, less noise and vibration, and is more suitable for electric personal care devices such as shavers and electric hair clippers.

[0037] When the motor with a double swing rod structure is in operation, the two swing rods move in a staggered and reciprocating manner, which makes the movements of the two swing rods restrict each other, and both the power and driving force will be affected. The two groups of connecting rods between the two swing rods in the double swing rod structure have mechanical friction during operation, which will cause wear. When the wear reaches a certain level, the frictional force will increase accordingly, reducing the driving force given by the motor to the swing rod and increasing the power consumption.

[0038] The single pendulum motor structure with a single swing seat 2 has no connecting rod and no mechanical friction, so there will be no wear. Therefore, the power is more direct, the driving force is stronger, the power consumption is lower, and the service life of the motor will increase several times.

[0039] Specifically, as Figure 3 、 5 shown, the motor has a total of two elastic pieces 3. The two elastic pieces 3 are respectively located at the left and right ends of the mounting base 1 and the swing seat 2. The mounting base 1 and the swing seat 2 are both block-shaped. After the mounting base 1, the swing seat 2 and the two elastic pieces 3 are integrally formed, they jointly form a mouth-shaped swing frame 8. Two swing extension seats 9 arranged at intervals front and back protrude upward from the middle of the swing seat 2. The driving rod 7 is inserted on the swing extension seats 9. The swing seat 2 and the swing extension seats 9 are integrally formed. When pre-producing the swing frame 8, the driving rod 7 is also installed on the swing extension seats 9 at the same time. Therefore, the swing seat 2, the swing extension seats 9 and the driving rod 7 are all integrally formed and belong to the same module.

[0040] As Figure 3 、 5, as shown in Figure 8, the mounting base 1 and the swing base 2 are injection-molded, and the upper end of the elastic piece 3 is injection-molded together when the swing base 2 is injection-molded, and the lower end of the elastic piece 3 is injection-molded together when the mounting base 1 is injection-molded; specifically, directly when the mounting base 1 and the swing base 2 are injection-molded, the upper end of the elastic piece 3 is injection-molded into the swing base 2, and the lower end of the elastic piece 3 is injection-molded into the mounting base 1. At the same time, the upper and lower ends of the elastic piece 3 are both provided with special-shaped holes 10, and the shapes of the special-shaped holes 10 at the upper and lower ends are the same. After injection-molding, the mounting base 1 fills the special-shaped hole 10 at the lower end of the elastic piece 3, and the swing base 2 fills the special-shaped hole 10 at the upper end of the elastic piece 3, so as to realize the fixed connection between the elastic piece 3 and the swing base 2 and the mounting base 1; for the module composed of the mounting base 1, the swing base 2 and the elastic piece 3, according to this scheme, pre-production is realized. The elastic piece 3, the mounting base 1 and the swing base 2 are injection-molded together, and there is no need for further assembly and fixed connection. Moreover, the fasteners in the prior art are small in volume and large in number, so the assembly is inconvenient and difficult. This scheme solves these problems and greatly reduces the complexity of production assembly; during injection-molding, the mounting base 1 and the swing base 2 will fill these special-shaped holes 10, making the connection between the mounting base 1, the swing base 2 and the elastic piece 3 more stable and reliable, and improving the reliability of the product.

[0041] A vertical slot 11 is provided in the middle of the elastic piece 3, and the slot 11 does not penetrate the upper and lower ends of the elastic piece 3. Therefore, the upper and lower ends of the elastic piece 3 can be provided with special-shaped holes 10 for connecting the swing part and the fixed part; the existence of the slot 11 is beneficial to deformation while reducing the noise generated by deformation.

[0042] As Figure 6 , 7 shown, the outer bracket 4 includes a seat part 13, a front blocking part 14 and a rear blocking part 15. The front blocking part 14 and the rear blocking part 15 are arranged at intervals front and rear, and both the front blocking part 14 and the rear blocking part 15 are arranged on the lower surface of the seat part 13 and extend downward; the swing base 2, the mounting base 1 and the stator coil assembly 5 are all located between the front blocking part 14 and the rear blocking part 15. The seat part 13, the front blocking part 14 and the rear blocking part 15 are integrally formed; the outer bracket 4 is integrally formed, and there is no need for assembly and fixation between the seat part 13, the front blocking part 14 and the rear blocking part 15, further simplifying the production assembly and improving the production efficiency.

[0043] A window 16 is provided on the seat part 13 of the outer bracket 4. The swing extension seat 9 and the driving rod 7 extend out of the outer bracket 4 through the window 16, so that the driving rod 7 can be connected to the moving part, thereby realizing the function of the device; on the left and right sides of the window 16 of the seat part 13, a blocking seat 17 protrudes upward. A return spring 18 is provided between each blocking seat 17 and the swing extension seat 9. There are four return springs 18, one is arranged on each of the left and right sides of the swing extension seat 9. The return spring 18 abuts against the blocking seat 17 and the swing extension seat 9. The return spring 18 can make the driving rod 7 quickly return to its position and move in the other direction.

[0044] As Figure 4 , 5 shown, the mounting base 1 is provided with stator coil fixing bases 19 which are symmetric about the left and right between the two elastic pieces 3. The stator coil fixing bases 19 protrude upward from the mounting base 1 and extend in the front-rear direction. An installation groove 20 is formed at the lower end of the stator coil fixing bases 19. The installation grooves 20 of the two stator coil fixing bases 19 face each other. Corresponding left and right symmetric positioning protrusions 21 are formed at the lower end of the stator coil assembly 5. The positioning protrusions 21 are inserted into the installation grooves 20, so that the stator coil assembly 5 is relatively stationary with the mounting base 1 in the up-down direction. The stator coil fixing bases 19 make the stator coil assembly 5 relatively stationary with the mounting base 1 in the left-right direction. The front blocking part 14 and the rear blocking part 15 of the outer bracket 4 can limit the movement of the stator coil assembly 5 in the front-rear direction.

[0045] During production, the outer bracket 4, the stator coil assembly 5, and the above-mentioned swing frame 8 are all produced at one time, either integrally formed or pre-assembled. When assembling the motor, the stator coil assembly 5 is directly installed on the swing frame 8, and then the outer bracket 4 is sleeved outside the stator coil assembly 5 and the swing frame 8. Finally, the outer bracket 4 is locked with the stator coil assembly 5 and the swing frame 8 with screws. The production and assembly are simple and convenient, and the efficiency is higher.

[0046] During operation, the stator coil assembly 5 is energized. The stator coil assembly 5 generates a magnetic field and continuously changes the direction of the magnetic field. The magnetic field switches between the positive and negative directions in sequence. When under the action of the positive magnetic field, the swing seat 2 provided with the magnet 22 swings in one direction. When the positive magnetic field ends and becomes a negative magnetic field, the swing seat 2 immediately returns to the original position under the action of the return spring 18 and the elastic piece 3 and continues to swing in the opposite direction. When it is switched to the positive magnetic field again, the swing seat 2 returns to the original position again and swings in the first direction, swinging continuously back and forth, driving the drive rod 7 to complete the work.

Claims

1. A magnetic levitation motor, characterized in that: It includes a mounting base, a swing base, a spring piece, an outer bracket, and a stator coil assembly. The swing base and the mounting base are arranged at an interval up and down, and the swing base is located above the mounting base. The spring piece is arranged between the swing base and the mounting base, and the spring pieces are provided at both the left and right ends of the swing base and the mounting base. The mounting base, the swing base, and the spring piece are integrally formed. The stator coil assembly is mounted on the mounting base. A magnet and a driving rod are further provided on the swing base. The stator coil assembly and the magnet are configured to energize the stator coil assembly to drive the swing base to swing relative to the mounting base and maintain the swing path under the action of the spring piece, thereby driving the driving rod to move. The outer bracket is sleeved outside the swing base, the mounting base, and the stator coil assembly and is fixedly connected to the mounting base and the stator coil assembly.

2. The magnetic levitation motor according to claim 1, wherein: The mounting base and the swing base are injection-molded, and the upper end of the spring piece is injection-molded together when the swing base is injection-molded, and the lower end of the spring piece is injection-molded together when the mounting base is injection-molded.

3. The magnetic levitation motor according to claim 2, wherein: The upper end and the lower end of the spring piece are both provided with special-shaped holes.

4. The magnetic levitation motor according to claim 1, wherein: A swing extension base protrudes upward from the swing base. The swing extension base protrudes upward from the swing base. The driving rod is inserted into the swing extension base. A window is provided on the outer bracket, and the swing extension base and the driving rod extend out of the outer bracket through the window.

5. The magnetic levitation motor according to claim 4, wherein: On both the left and right sides of the window of the outer bracket, a retaining seat protrudes upward. A return spring is provided between each retaining seat and the swing extension base.

6. The magnetic levitation motor according to claim 1, wherein: The outer bracket includes a seat part, a front retaining part, and a rear retaining part. The front retaining part and the rear retaining part are arranged at an interval front and rear, and both the front retaining part and the rear retaining part are provided on the lower surface of the seat part and extend downward. The swing base, the mounting base, and the stator coil assembly are all located between the front retaining part and the rear retaining part.

7. The magnetic levitation motor according to claim 6, wherein: The seat part, the front retaining part, and the rear retaining part are integrally formed.

8. The magnetic levitation motor according to claim 1, wherein: A vertical slot is provided in the middle of the spring piece.

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