Magnetic suspension linear motor

Abstract

The invention discloses a magnetic suspension linear motor which comprises a mounting seat, a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are both arranged on the mounting seat, the mounting seat comprises a fixed part and a swing part, and the mounting seat is of an integrated injection molding structure; the stator assembly is fixed on the fixed part, and the rotor assembly is fixed on the swing part; the swinging part comprises a first swinging part and a second swinging part, and the two groups of mover assemblies are respectively a first group of mover assemblies and a second group of mover assemblies; springback rings are arranged on the two sides of the swing part, a notch is formed in the top end of each springback ring, one side of each notch is fixed to the first swing part, and the other side of each notch is fixed to the second swing part; the springback ring and the mounting base are of an integrated injection molding structure. Through the integrated injection molding structure of the mounting seat, the structure of the whole motor is greatly simplified, and the production cost is reduced; the arc-shaped part is arranged at the top of the springback ring, when the swing part swings towards one side, the springback force of the arc-shaped part drives the swing part to springback, and the overall structure is simplified.

Description

Technical Field

[0001] The invention belongs to the field of motors, and in particular relates to a magnetic suspension linear motor. Background Art

[0002] Electric tools such as hair clippers and shavers require linear motors to drive the blades to move back and forth at a high frequency to achieve hair cutting. Due to the particularity of the usage scenario, this type of motor needs to meet the characteristics of small size and high power. However, most of the existing linear motors used for electric tools such as hair clippers and shavers have a relatively complex structure, many parts, and are difficult to assemble, which greatly increases the production cost. For example, a brushless electromagnetic suspension vibration motor disclosed in application number 202111536822.8 includes a reset spring, a bottom corner support, a coil fixing base, a front and rear support frame, a shrapnel and other structures. There are many parts and it is difficult to assemble. After assembly, the volume of the motor is also increased, thereby increasing the corresponding installation space requirements for the hair clipper and shaver; and the overall cost is high, and the production is difficult. Summary of the invention

[0003] The object of the present invention is to provide a magnetic levitation linear motor that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, a magnetic suspension linear motor is provided, comprising a mounting seat, a stator assembly and a mover assembly, wherein the stator assembly and the mover assembly are both arranged on the mounting seat, and the mover assembly is located above the stator assembly and is arranged corresponding to the stator assembly;

[0005] The mounting seat comprises a fixed portion and a swing portion, the swing portion is arranged above the fixed portion, and the mounting seat is an integral injection molding structure;

[0006] The stator assembly is fixed on the fixed part, and the mover assembly is fixed on the swing part;

[0007] The swing part includes a first swing part and a second swing part, the first swing part and the second swing part are arranged in parallel, and the movable subassembly is divided into two groups, namely a first group of movable subassembly and a second group of movable subassembly, the first group of movable subassembly is arranged on the first swing part, and the second group of movable subassembly is arranged on the second swing part;

[0008] Both sides of the swing part are provided with rebound rings, and the top of the rebound ring is provided with a notch, one side of the notch is fixed on the first swing part, and the other side of the notch is fixed on the second swing part;

[0009] The rebound ring and the mounting seat are an integral injection-molded structure.

[0010] In some embodiments, the top of the rebound ring is protruded inwardly to form a connecting portion, the notch is located on the connecting portion and penetrates the rebound ring outwardly, and the rebound ring is connected to the swinging portion through the connecting portion;

[0011] The outer side of the top of the rebound ring is provided with an arc portion, which is concave toward one side of the connecting portion, and arc portions are provided on both sides of the notch and are symmetrically arranged. Thus, by providing the connecting portion, a certain space is provided between the rebound ring and the swinging portion, which facilitates the swinging portion to swing back and forth left and right.

[0012] In some embodiments, the outer wall of the rebound ring is a vertical wall, and the vertical wall is located below the arc portion and outside the arc portion. Therefore, by providing the vertical wall, it is convenient to fix the two sides of the rebound ring on the external matching structure through the vertical wall, so as to facilitate the installation and fixation of the entire motor.

[0013] In some embodiments, the first swinging part and the second swinging part have the same structure, and the first swinging part includes spring plates fixed above both sides of the fixed part. The spring plates on both sides are multiple pieces, and the rebound ring is connected to the outermost spring plates.

[0014] In some embodiments, the first swinging portion further includes a mounting portion, the mounting portion is located above the fixing portion, the mounting portion is located between the two side springs, the first group of movable subassemblies is mounted on one of the mounting portions, and the second group of movable subassemblies is mounted on the other mounting portion. Thus, the provision of the mounting portion can facilitate the installation of the first group of movable subassemblies and the second group of movable subassemblies.

[0015] In some embodiments, the stator assembly includes a stator core and a winding, the stator core includes an end, a first electromagnetic column, a second electromagnetic column, and a third electromagnetic column, the first electromagnetic column, the second electromagnetic column, and the third electromagnetic column are vertically fixed above the end in sequence, the second electromagnetic column is sleeved with a wire rack, and the winding is wound on the wire rack. Thus, through the stator assembly, by alternating the direction of the current, it is convenient to drive the mover assembly to swing.

[0016] In some embodiments, a U-shaped groove is provided on the fixing part, a first mounting hole and a second mounting hole are provided on both sides of the U-shaped groove, a through hole is provided at the bottom of the fixing part, the first mounting hole and the second mounting hole are both connected to the through hole, the bottom of the U-shaped groove is connected to the through hole, the end is fixed in the through hole, the first electromagnetic column and the third electromagnetic column extend upward from the first mounting hole and the second mounting hole respectively, and the second electromagnetic column extends upward from the U-shaped groove. Thus, through the various structures on the fixing part, it is convenient to directly insert the stator core for fixing, and the installation structure is simple; through the U-shaped groove, sufficient space can be reserved for the winding.

[0017] In some embodiments, the first group of movable sub-assemblies has the same structure as the second group of movable sub-assemblies, and the first group of movable sub-assemblies includes a first magnet, a second magnet, an iron yoke, a swinging member and an output shaft, the iron yoke is fixed below the swinging member, the output shaft is fixed above the swinging member, the first magnet and the second magnet are both fixed below the iron yoke, the first magnet and the second magnet are both located above the stator assembly, the magnetic pole of the first magnet is opposite to the magnetic pole of the second magnet, and the magnetic pole distribution of the two magnets in the first group of movable sub-assemblies is opposite to the magnetic pole distribution of the two magnets in the second group of movable sub-assemblies.

[0018] In some embodiments, a baffle is provided below the swinging member, a receiving groove is formed between the baffle and the swinging member, and the iron yoke is fixed in the receiving groove; a swing rod is provided at the top of the swinging member, and the output shaft is connected to the swinging member through the swing rod, and the swinging member, the baffle and the swing rod are an integrated structure. Thus, by providing the receiving groove, it is convenient to fix the iron yoke on the swinging member, and it is convenient to install the iron yoke; by the integrated molding of the various parts of the swinging member, the processing process of the swinging member can be simplified, and it is convenient to drive the swing rod to swing synchronously through the swinging member, and drive the output shaft to swing through the swinging.

[0019] In some embodiments, the mounting portion is located on both sides of the movable subassembly, an open slot is provided on the mounting portion, and protrusions are provided upward at both ends of the swinging member, and both ends of the swinging member and the protrusions are located in the open slots and fixed to the open slots. Thus, through the open slots, the two ends of the swinging member can be conveniently fixed in the open slots, which facilitates the installation of the swinging member, that is, the installation of the movable subassembly is convenient.

[0020] The beneficial effects of the present invention are:

[0021] 1. The fixed part facilitates the installation of the stator assembly; the swing part facilitates the installation of the mover assembly and facilitates the swing part to swing relative to the fixed part;

[0022] 2. The mounting base is an integrated injection molding structure, which greatly simplifies the structure of the entire motor and greatly reduces the number of parts, making the assembly of the entire motor very convenient and simple, which helps to reduce the volume of the entire motor and greatly reduces the production cost of the entire motor;

[0023] 3. By providing the first swinging part and the second swinging part, the first swinging part and the second swinging part can be driven to swing under the action of the first group of movable subassemblies and the second group of movable subassemblies respectively, thereby meeting the use requirements of the entire motor;

[0024] 4. A rebound ring is provided, and an arc portion is provided on the top of the rebound ring. Therefore, when the first swinging part swings to one side, the first swinging part can have a certain swinging space, and the arc portion on the corresponding side is deformed to a certain extent. When the current on the stator assembly changes, the first swinging part is driven to rebound by the rebound force of the arc portion, thereby replacing the spring and other structures in the prior art; similarly, when the second swinging part swings, the corresponding arc portion is deformed, and the arc portion can drive the second swinging part to rebound, which greatly simplifies the rebound structure; and the overall structure is simplified by the integral injection molding structure of the rebound ring and the mounting seat;

[0025] 5. The spring sheet can facilitate the support of the entire swing part and the support of the mover assembly. At the same time, the spring sheet can facilitate the left and right swing of the first swing part and the second swing part to meet the corresponding swing range requirements;

[0026] 6. By providing two magnets with opposite magnetic poles on the first group of moving subassemblies and the second group of moving subassemblies, the first swinging part and the second swinging part can swing in opposite directions under the action of the stator core, that is, the two swinging parts can swing back and forth in opposite directions, thereby meeting the use requirements of the motor;

[0027] 7. The structures such as the spring sheet and the rebound ring are all made of an integral injection molding structure, that is, they are all injection molded parts, which can facilitate the production and processing of the entire structure and greatly reduce the material cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a magnetic suspension linear motor of the present invention.

[0029] Figure 2 It is a side structural schematic diagram of a magnetic suspension linear motor of the present invention.

[0030] Figure 3 It is a schematic cross-sectional structure diagram of a magnetic suspension linear motor of the present invention.

[0031] Figure 4 It is a structural schematic diagram of a middle mounting seat of a magnetic suspension linear motor of the present invention.

[0032] Figure 5 It is a structural schematic diagram of a stator assembly of a magnetic suspension linear motor of the present invention.

[0033] Figure 6 It is a structural schematic diagram of a middle swinging part of a magnetic suspension linear motor of the present invention.

[0034] Figure 7 It is a structural schematic diagram of a middle moving subassembly of a magnetic suspension linear motor of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] Reference Figure 1 to Figure 4 A magnetic suspension linear motor comprises a mounting seat 1, a stator assembly 2 and a mover assembly 3. The stator assembly 2 and the mover assembly 3 are both arranged on the mounting seat 1. The mover assembly 3 is located above the stator assembly 2 and is arranged corresponding to the stator assembly 2, that is, the magnetic field generated on the stator assembly 2 can act on the mover assembly 3, thereby driving the mover assembly 3 to swing left and right;

[0037] The mounting seat 1 comprises a fixed portion 11 and a swing portion 12, wherein the swing portion 12 is disposed above the fixed portion 11, and the mounting seat 1 is an integral injection molding structure;

[0038] The stator assembly 2 is fixed on the fixed portion 11 , and the mover assembly 3 is fixed on the swinging portion 12 . Therefore, when the mover assembly 3 swings under the action of the stator assembly 2 , the swinging portion 12 can be driven to swing.

[0039] The swinging part 12 includes a first swinging part 121 and a second swinging part 122, the first swinging part 121 and the second swinging part 122 are arranged in parallel, and the movable subassembly 3 is divided into two groups, namely a first group movable subassembly 31 and a second group movable subassembly 32, the first group movable subassembly 31 is arranged on the first swinging part 121, and the second group movable subassembly 32 is arranged on the second swinging part 122. Therefore, when the first group movable subassembly 31 swings, it can drive the first swinging part 121 to swing, and when the second group movable subassembly 32 swings, it can drive the second swinging part 122 to swing.

[0040] In actual use, a limiting groove 115 is provided on the bottom end surface of the fixing portion 11, and the fixing seat 1 can be matched with the corresponding external structure through the limiting groove 115 to achieve left and right positioning of the fixing seat 11, which is convenient for the installation of the entire magnetic suspension linear motor. At the same time, in order to improve the stability of the fixing portion 11 when installed on a hair clipper or a shaver, threaded holes are formed on the left and right sides of the fixing portion 11, which is convenient for locking and fixing the threaded holes with the external structure by screws.

[0041] A rebound ring 4 is provided on both sides of the swing part 12, and a notch 41 is provided at the top of the rebound ring 4. One side of the notch 41 is fixed to the first swing part 121, and the other side of the notch 41 is fixed to the second swing part 122; wherein the rebound ring 4 and the mounting seat 1 are an integral injection molding structure.

[0042] By providing the notch 41, the two sides of the notch 41 of the rebound ring 4 can be conveniently connected to the first swing part 121 and the second swing part 122 respectively. Therefore, when the first swing part 121 swings, it can push one side of the notch 41 of the rebound ring 4 (the side connected to the first swing part 121) to deform; when the second swing part 122 swings, it can push the other side of the notch 41 of the rebound ring 4 (the side connected to the second swing part 122) to deform, so that the corresponding parts of the rebound ring 4 on both sides of the notch 41 can be deformed under the action of the two swing parts without being affected by each other.

[0043] The top of the rebound ring 4 is convexly formed with a connecting portion 42 toward the inside, the notch 41 is located on the connecting portion 42 and penetrates the rebound ring 4 toward the outside, and the rebound ring 4 is connected to the swinging portion 12 through the connecting portion 42;

[0044] An arc-shaped portion 43 is formed on the outer side of the top of the rebound ring 4 . The arc-shaped portion 43 is recessed toward one side of the connecting portion 42 . The arc-shaped portions 43 are provided on both sides of the notch 41 and are symmetrically arranged.

[0045] The outer side wall of the rebound ring 4 is a vertical wall 44 . The vertical wall 44 is located below the arc-shaped portion 43 and outside the arc-shaped portion 43 .

[0046] When the magnetic levitation linear motor is installed on a hair clipper or a shaver, the vertical walls 44 of the rebound rings 4 on both sides abut against the external structure, which is convenient for further limiting the left and right positions of the entire motor; at the same time, by abutting the vertical walls 44 against the external structure, the overall vibration can be reduced, thereby helping to reduce noise and achieve a noise reduction effect.

[0047] By providing the connecting portion 42, a certain space can be provided between the rebound ring 4 and the swinging portion 12, thereby reserving sufficient space for the swinging of the first swinging portion 121 and the second swinging portion 122; at the same time, by providing the arc portion 43 and being concave inward, the outer side of the top of the rebound ring 4 will not abut against the external structure, thereby ensuring that the first swinging portion 121 and the second swinging portion 122 can swing left and right. At the same time, by providing the arc portion 43, taking the swinging of the first swinging portion 121 as an example, when the first swinging portion 121 swings left or right, the arc portion 43 connected to the outer side of the first swinging portion 121 undergoes a certain deformation under the joint action of the first swinging portion 121 and the vertical wall 44; when the current on the stator assembly changes, the arc portion 43 provides a rebound force for the first swinging portion 121, which facilitates the rebound of the first swinging portion 121 and swings in the opposite direction, so that the first swinging portion 121 can swing back and forth left and right. Similarly, the second swinging portion 122 can also rebound under the action of the arc portion 43 on the rebound ring 4 on the corresponding side, which is beneficial for the second swinging portion 122 to swing back and forth repeatedly.

[0048] The first swinging part 121 has the same structure as the second swinging part 122 . The first swinging part 121 includes spring pieces 1211 . The spring pieces 1211 are fixed on the upper sides of the fixing part 11 . The spring pieces 1211 on both sides are multiple pieces. The rebound ring 4 is connected to the outermost spring piece 1211 .

[0049] The spring piece 1211 and the rebound ring 4 are both integrally injection molded with the mounting base 1, which greatly simplifies the assembly difficulty of the entire mounting base 1, making the mounting base 1 a whole, greatly reducing the assembly of parts, which is beneficial to reducing production costs, and is beneficial to reducing the volume of the entire mounting base 1, thereby reducing the installation space requirements of the entire motor.

[0050] In the actual production process, the spring pieces 1211 on each side of the first swing part 121 and the second swing part 122 can be four pieces, and each two pieces form a group, that is, the spring pieces on each side of the first swing part 121 and the second swing part 122 are divided into two groups, which can improve the load-bearing capacity of the movable subassembly; at the same time, a cavity is formed between the two groups of spring pieces on each side, which is convenient for the elastic deformation of each spring piece group and the left and right swing of the movable subassembly 3. By providing the spring pieces 1211, when the movable subassembly on the first swing part 121 and the second swing part 122 swings, in order to enable the movable subassembly to swing, the movable subassembly acts on the corresponding swing part, and the spring pieces on the swing part are deformed, which can meet the swing requirements of the movable subassembly.

[0051] The first swinging part 121 further includes a mounting part 1212, the mounting part 1212 is located above the fixing part 11, the mounting part 1212 is located between the two side spring pieces 1211, the first group of movable subassemblies 31 is mounted on one of the mounting parts 1212, and the second group of movable subassemblies 32 is mounted on the other mounting part 1212. Therefore, it is convenient to independently mount the first group of movable subassemblies 31 and the second group of movable subassemblies 32, and it is convenient for the left and right swings of the two swinging parts 121 to not interfere with each other.

[0052] like Figure 1 , Figure 3 to Figure 5 As shown, the stator assembly 2 includes a stator core 21 and a winding 22. The stator core 21 includes an end 211, a first electromagnetic column 212, a second electromagnetic column 213 and a third electromagnetic column 214. The first electromagnetic column 212, the second electromagnetic column 213 and the third electromagnetic column 214 are vertically fixed above the end 211 in sequence. The second electromagnetic column 213 is sleeved with a bobbin 23, and the winding 22 is wound on the bobbin 23. Through each part of the stator core 21, it is convenient to pass the current with alternating directions, so that the force finally acting on the mover assembly 3 through the winding is switched left and right, meeting the left and right swing requirements of the mover assembly.

[0053] A U-shaped groove 111 is provided on the fixing portion 11, and a first mounting hole 112 and a second mounting hole 113 are provided on both sides of the U-shaped groove 111. A through hole 114 is provided at the bottom of the fixing portion 11, and the first mounting hole 112 and the second mounting hole 113 are both connected to the through hole 114. The bottom of the U-shaped groove 111 is connected to the through hole 114, and the end 211 is fixed in the through hole 114. The first electromagnetic column 212 and the third electromagnetic column 214 extend upward from the first mounting hole 112 and the second mounting hole 113 respectively, and the second electromagnetic column 213 extends upward from the U-shaped groove 111.

[0054] Therefore, by opening the through hole 114, the first mounting hole 112 and the second mounting hole 113, when the stator assembly 2 needs to be installed on the fixing part 11, the three electromagnetic columns of the stator core 21 are directly inserted, so that the first electromagnetic column 212 and the third electromagnetic column 214 extend upward from the first mounting hole 112 and the second mounting hole 113 respectively, and the second electromagnetic column 213 is inserted from the through hole 114 to the U-shaped groove 111, so that the stator core 21 can be installed on the fixing part 11, and the installation is convenient; and after assembly, the end 211 is located in the through hole 114, which can reduce the space occupied by the stator core 21, thereby reducing the overall volume. In order to improve the stability of the stator core 21 installed on the fixing part 11, after the stator core 21 and the fixing part 11 are matched, the stator core 21 and the fixing part 11 are locked and fixed by external screws.

[0055] After the stator core 21 is installed on the fixing part 11, the bobbin 23 and the winding 22 are sleeved on the second electromagnetic column 214 to complete the installation of the entire stator assembly 2 on the fixing part 11. In order to facilitate the positioning and matching of the stator assembly 2 with the external structure, the front end of the bobbin 23 exceeds the front end of the fixing part, and a positioning column 231 is formed at the front end of the bobbin, which can match with the external structure through the positioning column 231, so as to facilitate the rapid positioning and installation with the external structure.

[0056] like Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the first group of movable subassemblies 31 and the second group of movable subassemblies 32 have the same structure. The first group of movable subassemblies 31 include a first magnet 311, a second magnet 312, an iron yoke 313, a swinging piece 314 and an output shaft 315. The iron yoke 313 is fixed below the swinging piece 314, and the output shaft 315 is fixed above the swinging piece 314. The first magnet 311 and the second magnet 312 are both fixed below the iron yoke 313. The first magnet 311 and the second magnet 312 are both located above the stator assembly 2. The magnetic pole of the first magnet 311 is opposite to the magnetic pole of the second magnet 312, and the magnetic pole distribution of the two magnets in the first group of movable subassemblies 31 is opposite to the magnetic pole distribution of the two magnets in the second group of movable subassemblies 32.

[0057] Therefore, through the distribution of the iron yoke 313 and each magnet, the mover assembly 3 can swing under the action of the stator assembly 2. Since the magnetic pole distribution of the two magnets in the first group of mover assemblies 31 is opposite to the magnetic pole distribution of the two magnets in the second group of mover assemblies 32, when in use, the movement directions of the first group of mover assemblies 31 and the second group of mover assemblies 32 are opposite, so that the swing directions of the output shafts 315 connected to the two swinging members 314 are opposite, meeting the use requirements.

[0058] A baffle plate 315 is provided below the swing member 314, and a receiving groove 316 is formed between the baffle plate 315 and the swing member 314, and the iron yoke 313 is fixed in the receiving groove 316; a rocker 317 is provided at the top of the swing member 314, and the output shaft 315 is connected to the swing member 314 through the rocker 317, and the swing member 314, the baffle plate 315 and the rocker 317 are an integrated structure. Therefore, the iron yoke 313 can be quickly positioned and installed by placing it in the receiving groove 316. When in use, in order to prevent the iron yoke 313 from loosening, the swing member 314 and the iron yoke 313 are locked and fixed by screws, so as to achieve the stability of the combination of the iron yoke 313 and the swing member 314.

[0059] The mounting portion 1212 is located at both sides of the mover assembly 3, and an open groove 1213 is provided on the mounting portion 1212. Both ends of the swing member 314 are upwardly formed with protrusions 318, and both ends of the swing member 314 and the protrusions 318 are located in the open groove 1213 and fixed to the open groove 1213. Therefore, when the swing member 314 is matched with the mounting portion 1212, the swing member 314 can be inserted into the open groove 1213 from the front side of the mounting portion 1212.

[0060] In actual production, the top of the opening groove 1213 is provided with a folded edge 1214 downward, and the folded edge 1214 can limit the side wall of the protrusion 318 to prevent the swinging member 314 from loosening from the mounting portion 1212 when swinging left and right, thereby reducing noise. At the same time, a supporting edge 1215 is formed at the bottom of the opening groove 1213, and the supporting edge 1215 can support and bear the iron yoke 313 and the swinging member 314. Therefore, the mounting portion 1212 can facilitate the installation of the moving subassembly.

[0061] The above are only preferred embodiments of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A magnetic suspension linear motor, characterized in that: It comprises a mounting seat (1), a stator assembly (2) and a mover assembly (3), wherein the stator assembly (2) and the mover assembly (3) are both arranged on the mounting seat (1), and the mover assembly (3) is located above the stator assembly (2) and is arranged corresponding to the stator assembly (2); The mounting seat (1) comprises a fixed portion (11) and a swing portion (12), wherein the swing portion (12) is arranged above the fixed portion (11), and the mounting seat (1) is an integral injection molding structure; The stator assembly (2) is fixed on the fixed part (11), and the mover assembly (3) is fixed on the swing part (12); The swinging part (12) comprises a first swinging part (121) and a second swinging part (122), the first swinging part (121) and the second swinging part (122) are arranged in parallel, the movable subassembly (3) comprises two groups, namely a first group of movable subassemblies (31) and a second group of movable subassemblies (32), the first group of movable subassemblies (31) being arranged on the first swinging part (121), and the second group of movable subassemblies (32) being arranged on the second swinging part (122); Rebound rings (4) are provided on both sides of the swinging part (12); a notch (41) is provided at the top of the rebound ring (4); one side of the notch (41) is fixed on the first swinging part (121), and the other side of the notch (41) is fixed on the second swinging part (122); The rebound ring (4) and the mounting seat (1) are an integral injection-molded structure.

2. A magnetic suspension linear motor according to claim 1, characterized in that: The top of the rebound ring (4) is protruding inwardly and is provided with a connecting portion (42); the notch (41) is located on the connecting portion (42) and penetrates the rebound ring (4) outwardly; the rebound ring (4) is connected to the swinging portion (12) via the connecting portion (42); An arc-shaped portion (43) is provided on the outer side of the top of the rebound ring (4), and the arc-shaped portion (43) is recessed toward one side of the connecting portion (42). Arc-shaped portions (43) are provided on both sides of the notch (41) and are symmetrically arranged.

3. A magnetic suspension linear motor according to claim 2, characterized in that: The outer side wall of the rebound ring (4) is a vertical wall (44), and the vertical wall (44) is located below the arc-shaped portion (43), and the vertical wall (44) is located outside the arc-shaped portion (43).

4. A magnetic suspension linear motor according to claim 3, characterized in that: The first swinging part (121) and the second swinging part (122) have the same structure. The first swinging part (121) comprises spring sheets (1211). The spring sheets (1211) are fixed above both sides of the fixed part (11). The spring sheets (1211) on both sides are multiple sheets. The rebound ring (4) is connected to the outermost spring sheets (1211).

5. The magnetic suspension linear motor according to claim 4, characterized in that: The first swinging portion (121) further comprises a mounting portion (1212), wherein the mounting portion (1212) is located above the fixing portion (11), and the mounting portion (1212) is located between the spring sheets (1211) on both sides; the first group of movable subassemblies (31) is mounted on one of the mounting portions (1212), and the second group of movable subassemblies (32) is mounted on the other of the mounting portions (1212).

6. A magnetic suspension linear motor according to any one of claims 1 to 5, characterized in that: The stator assembly (2) comprises a stator core (21) and a winding (22); the stator core (21) comprises an end (211), a first electromagnetic column (212), a second electromagnetic column (213) and a third electromagnetic column (214); the first electromagnetic column (212), the second electromagnetic column (213) and the third electromagnetic column (214) are vertically fixed in sequence above the end (211); a wire frame (23) is sleeved on the second electromagnetic column (213); and the winding (22) is wound on the wire frame (23).

7. The magnetic suspension linear motor according to claim 6, characterized in that: The fixing portion (11) is provided with a U-shaped groove (111), and a first mounting hole (112) and a second mounting hole (113) are provided on both sides of the U-shaped groove (111). A through hole (114) is provided at the bottom of the fixing portion (11), and the first mounting hole (112) and the second mounting hole (113) are both communicated with the through hole (114). The bottom of the U-shaped groove (111) is connected to the through hole (114), and the end portion (211) is fixed in the through hole (114). The first electromagnetic column (212) and the third electromagnetic column (214) extend upward from the first mounting hole (112) and the second mounting hole (113) respectively, and the second electromagnetic column (213) extends upward from the U-shaped groove (111).

8. The magnetic suspension linear motor according to claim 5, characterized in that: The first group of movable subassemblies (31) and the second group of movable subassemblies (32) have the same structure. The first group of movable subassemblies (31) comprises a first magnet (311), a second magnet (312), an iron yoke (313), a swinging member (314) and an output shaft (315). The iron yoke (313) is fixed below the swinging member (314), and the output shaft (315) is fixed above the swinging member (314). The first magnet (311) and the second magnet (312) are both fixed below the iron yoke (313). The first magnet (311) and the second magnet (312) are both located above the stator assembly (2). The magnetic pole of the first magnet (311) is opposite to the magnetic pole of the second magnet (312). The magnetic pole distribution of the two magnets in the first group of movable subassemblies (31) is opposite to the magnetic pole distribution of the two magnets in the second group of movable subassemblies (32).

9. The magnetic suspension linear motor according to claim 8, characterized in that: A baffle (315) is provided below the swing member (314); a receiving groove (316) is formed between the baffle (315) and the swing member (314); the iron yoke (313) is fixed in the receiving groove (316); a rocker (317) is provided at the top end of the swing member (314); the output shaft (315) is connected to the swing member (314) via the rocker (317); and the swing member (314), the baffle (315) and the rocker (317) are an integrally formed structure.

10. The magnetic suspension linear motor according to claim 9, characterized in that: The mounting portion (1212) is located on both sides of the movable subassembly (3); an open groove (1213) is provided on the mounting portion (1212); protrusions (318) are provided upwardly at both ends of the swing member (314); both ends of the swing member (314) and the protrusions (318) are located in the open groove (1213) and are fixed to the open groove (1213).

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