Magnetic suspension linear motor and hair cutting device

Abstract

The utility model discloses a magnetic suspension linear motor and hair cutting device, including stator subassembly, mover subassembly and elastic subassembly, elastic subassembly is connected stator subassembly and mover subassembly respectively, mover subassembly is provided stator subassembly one end, mover subassembly includes moving piece, elastic subassembly includes spring piece and at least one locating piece, the elastic piece is located in the stator subassembly. One end of the elastic piece is positioned on the stator assembly, the other end of the elastic piece is connected with the end of the moving piece in the moving direction, and at least one positioning piece is positioned at the end of the moving piece so as to fasten one end of the elastic piece to the end of the moving piece towards the moving piece. The elastic piece and the positioning piece are arranged, and the positioning piece is positioned at the end part of the moving piece so as to fasten one end of the elastic piece at the end part of the moving piece towards the direction of the moving piece, so that the elastic piece does not need to be directly welded with the moving piece, the welding high temperature is avoided, the material characteristics of the elastic piece are kept, and the product durability is improved.

Description

Technical Field

[0001] The utility model relates to the field of micro motors, in particular to a magnetic suspension linear motor and a hair cutting device. Background Art

[0002] Miniature magnetically levitated linear motors are often used in hair cutting equipment, such as hair clippers, razors and other handheld electric devices.

[0003] The magnetic suspension linear motor is mainly composed of a mover and a stator. The mover is connected to the stator through a spring, which supports the mover on the top of the stator. The stator is equipped with a coil-wound electromagnet. The mover interacts with the electromagnet through the permanent magnet on it. Combined with the connection of the spring, the mover forms a reciprocating linear motion to output linear motion outward. During the linear motion of the mobile mover, since it is in a high-frequency reciprocating motion, the connection between the spring and the mover is an important factor in the working stability and quality of the motor.

[0004] At present, there is a method of directly welding the mover and the spring piece, such as in the Chinese utility model patent with application number 2022234772503, the connecting section 411 and the first connecting end 211 of the spring piece are welded and fixed. The welding method is more secure than the rivet fixation, but there are the following problems: the spring piece is directly welded, and the spring piece is subjected to the high temperature of welding, and the material performance of the spring piece becomes brittle and hard, and the elasticity is reduced. Summary of the invention

[0005] The utility model provides a magnetic suspension linear motor and a hair cutting device, aiming to solve the problem that the elasticity of the shrapnel is reduced at high temperature due to direct welding of the shrapnel in the existing magnetic suspension linear motor.

[0006] According to an embodiment of the present application, a magnetic levitation linear motor is provided, comprising a stator assembly, a mover assembly and an elastic assembly, wherein the elastic assembly is respectively connected to the stator assembly and the mover assembly, and the mover assembly is arranged at one end of the stator assembly; the mover assembly comprises a moving part, and the elastic assembly comprises a spring sheet and at least one positioning member, wherein one end of the spring sheet is positioned at the stator assembly, and the other end is connected to the end of the moving part in the moving direction; at least one positioning member is positioned at the end position of the moving part to fasten one end of the spring sheet to the end of the moving part in the direction of the moving part.

[0007] Preferably, through holes are provided on the positioning member and the spring sheet, and a protruding positioning column is provided at the end of the movable member, and the positioning column passes through the through holes on the spring sheet and the positioning member.

[0008] Preferably, the number of the positioning posts is at least two, and at least two of the positioning posts are respectively abutted against different positions of the through hole; at least two of the positioning posts are opened away from each other outward from the end of the moving part to pre-tighten the spring sheet and the positioning part on the moving part.

[0009] Preferably, at least the outermost positioning member is welded and fixed at a contact position with the positioning column.

[0010] Preferably, the positioning column forms a step between the end surface of the moving member and the moving member; the positioning member or the elastic sheet passes through the positioning column and abuts against the step.

[0011] Preferably, the contact area of ​​the positioning member pressing the elastic sheet is greater than or equal to the contact area of ​​the elastic sheet at the end.

[0012] Preferably, the stator assembly includes an iron core and a coil, the iron core includes at least one magnetic shoe column, one coil is wound around one magnetic shoe column to form at least one magnetic shoe group; one end of the spring away from the mover assembly is positioned on the iron core.

[0013] Preferably, the iron core is provided with a positioning groove at the position of the spring sheet, and one end of the spring sheet away from the moving part is inserted into the positioning groove.

[0014] Preferably, there are two positioning members, the end of the spring sheet is clamped between the two positioning members, and the positioning member far away from the moving member is fixedly connected to the moving member.

[0015] The utility model also provides a hair cutting device, comprising the magnetic suspension linear motor as described in any one of the above items.

[0016] Compared with the prior art, the magnetic suspension linear motor and hair cutting device provided by the utility model have the following beneficial effects:

[0017] 1. By setting the spring piece and the positioning piece, the positioning piece is positioned at the end of the moving piece, and one end of the spring piece is fastened to the end of the moving piece in the direction of the moving piece, so that the spring piece itself does not need to be directly welded to the moving piece, avoiding high welding temperature, maintaining the material properties of the spring piece itself, and improving the durability of the product. At the same time, the positioning piece is used to press the spring piece, and the positioning piece is fixed on the moving piece, avoiding the problem of stress concentration and damage to the spring piece caused by direct welding of the spring piece, thereby protecting the spring piece.

[0018] 2. By setting at least two positioning columns passing through the through holes of the spring sheet and the positioning member, the two positioning columns are mutually opened outward to tension the positioning member and the spring sheet, so that the positioning member and the spring sheet can be tightly fixed on the end surface of the moving member.

[0019] 3. By setting two positioning members to clamp the spring sheet in the middle, the spring sheet is pressed and fixed by the positioning members on both sides of the moving direction of the moving member, which can avoid the problem of unstable unidirectional fixation of the spring sheet caused by the uneven surface of the positioning member shell and other problems, and further improve the stability of the spring sheet fixation.

[0020] 4. By setting the moving part as an integrated structure of the magnetizer, directly connecting the two ends of the magnetizer to the elastic component and fixing the magnet at the bottom, compared with the traditional method of using a shell, the moving part of this solution reduces the shell structure, and the moving part directly serves as the shell function and the magnetic function of the magnetizer, simplifying the product components.

[0021] 5. By separately setting a permanent magnet on a moving part and adopting magnetization, the permanent magnet is provided with at least two magnetic pole regions on the side surface facing the stator assembly. Compared with the traditional method of using multiple permanent magnets, the single permanent magnet in this scheme can further reduce the number of product parts and improve product assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a magnetic suspension linear motor provided by the first embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the exploded structure of the magnetic levitation linear motor provided by the first embodiment of the utility model.

[0025] Figure 3 This is another exploded structural schematic diagram of the magnetic levitation linear motor provided in the first embodiment of the utility model.

[0026] Figure 4 It is a structural schematic diagram of an elastic component in a magnetic suspension linear motor provided by the first embodiment of the utility model.

[0027] Figure 5 It is a structural schematic diagram of the distribution of different magnetic pole regions of the permanent magnet in the magnetic suspension linear motor provided by the first embodiment of the utility model.

[0028] Figure 6 It is a structural schematic diagram of a magnetic suspension linear motor provided by the first embodiment of the utility model when two sets of coils are wound around the magnetic shoe column.

[0029] Figure 7 yes Figure 6 Schematic diagram of the explosion state.

[0030] Description of the label:

[0031] 1. stator assembly; 11. iron core; 111. magnetic shoe column; 112. positioning groove; 12. coil;

[0032] 2. mover assembly; 21. moving part; 211. positioning column; 22. permanent magnet;

[0033] 3. elastic component; 31. spring piece; 32. positioning member;

[0034] 41. upper bracket; 42. lower bracket;

[0035] 100, through hole; 200, step; 300, magnetic pole region; 400, notch. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0038] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 4 The first embodiment of the utility model discloses a magnetic levitation linear motor, including a stator assembly 1, a mover assembly 2 and an elastic assembly 3, wherein the elastic assembly 3 is respectively connected to the stator assembly 1 and the mover assembly 2, the mover assembly 2 is arranged at one end of the stator assembly 1, the mover assembly 2 is supported by the elastic assembly 3 on the top of the stator assembly 1, the mover assembly 2 is separately arranged from the stator assembly 1, and the mover assembly 2 is located on the stator assembly 1 to perform reciprocating linear motion.

[0040] The movable component 2 includes a moving part 21 and a permanent magnet 22, wherein the permanent magnet 22 is positioned on a side of the moving part 21 close to the stator component 1. The elastic component 3 includes a spring piece 31 and at least one positioning member 32, wherein one end of the spring piece 31 is positioned on the stator component 1, and the other end is connected to the end of the moving part 21 in the moving direction. At least one positioning member 32 is positioned at the end position of the moving part 21 to fasten one end of the spring piece 31 to the end of the moving part 21 in the direction of the moving part 21. The spring piece 31 is an S-shaped or S-shaped sheet structure.

[0041] It can be understood that the moving direction of the moving member 21 is the left and right sides on the straight line, that is, the two end faces in the straight line direction of the reciprocating movement of the moving member 21 are both provided with and connected with spring pieces 31 and positioning members 32, and the spring pieces 31 at both ends support the moving member 21.

[0042] It can be understood that the number of the positioning members 32 can be one, two or more. For example, when there is one positioning member 32, a single positioning member 32 pre-tightens the spring sheet 31 on the moving member 21 at the outermost side, and the positioning member 32 is fixedly connected to the moving member 21. In the present embodiment, the number of the positioning members 32 is two, and the ends of the spring sheet 31 are clamped between the two positioning members 32, and one of the positioning members 32 away from the moving member 21 (that is, located at the outermost side of the moving member 21) is fixedly connected to the moving member 21. In particular, in other embodiments, the number of the positioning members 32 is greater than two, as long as at least one positioning member 32 can be located at the outermost side of the moving member 21 to pre-tighten the spring sheet 31 toward the moving member 21, and no limitation is made here.

[0043] It can be understood that in this embodiment, the positioning member 32 and the end of the movable member 21 are fixedly connected by welding. Specifically, at least the contact position of the positioning member 32 located on the outermost side and the movable member 21 is welded and fixed, and laser welding can be used.

[0044] Please continue to combine Figure 3 and Figure 4 The positioning member 32 and the spring sheet 31 are provided with through holes 100, and the end of the moving member 21 is provided with a protruding positioning column 211, and the positioning column 211 is formed at the end surface of the moving member 21, and a step 200 is formed between the moving member 21, and the positioning member 32 or the spring sheet 31 passes through the positioning column 211 and abuts against the step 200. The positioning column 211 passes through the through holes 100 on the spring sheet 31 and the positioning member 32.

[0045] It can be understood that the number of the positioning columns 211 is one, two or more. When the number of the positioning columns 211 is two or more, at least two of the positioning columns 211 are respectively abutted against different positions of the through hole 100, and at least two of the positioning columns 211 are opened away from each other outward from the end of the moving member 21 to pre-tighten the spring sheet 31 and the positioning member 32 on the moving member.

[0046] It can be understood that during installation, the spacing between the two positioning columns 211 is less than or equal to the width of the through hole 100. After installation, the two positioning columns 211 are stretched open by the equipment to form a slight angle opening outward, and the through hole 100 is tensioned from the outside to the inside, so that the spring piece 31 and the positioning member 32 are supported and fixed on the movable member 21, and the position where the through hole 100 of the outermost positioning member 32 contacts the positioning column 211 is tensioned and fixed by the positioning column 211.

[0047] In this embodiment, the positioning column 211 passes through the inner positioning piece 32, the spring piece 31 and the through hole 100 of the outer positioning piece 32 in sequence. After the outermost positioning piece 32 is pressed, the position where the outermost positioning piece 32 contacts the positioning column 211 is welded and fixed.

[0048] In particular, in other embodiments, the user can directly use at least two positioning columns 211 to open and fix the positioning member 32 and the spring sheet 31, and the spring sheet 31 can be positioned without using the welding fixation method. Alternatively, welding fixation can be directly used instead of using the fixing method of at least two positioning columns 211 to open the through hole 100. In this embodiment, the above-mentioned welding fixation and the fixing method of at least two positioning columns 211 to open the through hole 100 are both used, and the highest fixing effect of the spring sheet 31 can be obtained.

[0049] It can be understood that the contact area of ​​the positioning member 32 pressing the end surface of the spring sheet 31 is greater than or equal to the contact area of ​​the spring sheet 31 at the end. Figure 3 As shown in , in this embodiment, the end surface area of ​​the spring sheet 31 pressing the spring sheet 31 is equal to the contact area of ​​the spring sheet 31 at the end, so that the positioning member 32 can completely press the end of the spring sheet 31, and evenly distribute the force to the maximum area of ​​the spring sheet 31, thereby improving the clamping stability of the spring sheet 31. At the same time, the inner and outer positioning members 32 fully cover and press the end of the spring sheet 31, so that the spring sheet 31 is more evenly stressed when the moving member 21 moves, further improving the stability of the fixing of the spring sheet 31.

[0050] Optionally, as an embodiment, the end of the movable member 21 can be set to a flat surface, that is, the above-mentioned raised positioning column 211 is not set, and the positioning member 32 adopts an L-shaped or concave structure. The positioning member 32 is close to the end of the movable member 21, and after pressing the spring piece 31 through the middle part, it is fixed to the side position of the movable member 21 by sticking or welding the arm surfaces extending on both sides thereof.

[0051] Please combine Figure 2 , Figure 3 and Figure 4 The movable member 21 is an integrally formed structure of a magnetic conductor, that is, the movable member 21 is directly connected to the elastic component 3 and the permanent magnet 22 by an integrally formed structure of a permanent magnet, and the thickness of the movable member 21 is 1.5 mm. One permanent magnet 22 is positioned on one movable member 21, and one permanent magnet 22 is provided with at least two magnetic pole regions 300 on a surface facing the stator component 1, and the side of the permanent magnet 22 away from the stator component 1 is glued and fixed to the movable member 21.

[0052] It can be understood that the number of the moving member 21 can be one or two, the number of the moving member 21 and the number of the permanent magnet 22 correspond one to one, and a single permanent magnet 22 is positioned on one moving member 21. Figure 4 As shown in FIG. 1 , there are two moving members 21 . Each moving member 21 has a permanent magnet 22 positioned on a side surface close to the stator assembly 1 . The two moving members 21 move linearly in opposite directions alternately.

[0053] It can be understood that the permanent magnet 22 is magnetized in an integrated manner to form a plurality of magnetic pole regions 300 on the surface of the permanent magnet 22. Figure 5 As shown in Figure a, a single permanent magnet 22 is magnetized to form two magnetic pole regions 300, N and S, on the surface of the side facing the stator assembly 1, and the two magnetic pole regions 300, N and S, correspond to the stator assembly 1 as a single coil electromagnet structure. Or in other embodiments, such as Figure 5 As shown in Figures b and c, a single permanent magnet 22 can also form a magnetic arrangement of three magnetic pole regions 300 of NSN or SNS on the surface on the side facing the stator assembly 1 by magnetization. The specific arrangement is adjusted according to needs and will not be repeated here.

[0054] It can be understood that the magnetic pole region 300 is the magnetic pole action surface on the permanent magnet. For example, the common bar magnet has its magnetic pole regions N and S distributed on the end surfaces at both ends of the bar magnet. The magnetic pole region 300 is the surface that emits and receives magnetic lines of force. In this embodiment, the magnetic pole region 300 of the permanent magnet 22 is located on the side facing the stator assembly 1.

[0055] Please continue reading Figure 3The stator assembly 1 includes an iron core 11 and a coil 12. The iron core 11 includes at least one magnetic shoe column 111 and positioning grooves 112 disposed at the bottom of both ends. The magnetic shoe column 111 extends toward the moving member 21, and one end of the spring 31 away from the moving member 21 is inserted into the positioning groove 112. One coil 12 is wound around one magnetic shoe column 111 to form at least one magnetic shoe group.

[0056] It is understood that the magnetic suspension linear motor may include a single-coil electromagnet or a double-coil electromagnet structure, such as Figure 3 As shown in FIG. 1 , a coil 12 is wound around a magnetic shoe column 111 to form a single-coil electromagnet. At this time, the permanent magnet 22 located on the moving part 21 is two magnetic pole regions 300. Or in other embodiments, such as Figure 6 and Figure 7 As shown in FIG. 1 , two magnetic shoe columns 111 are wound with coils 12 to form a double-coil electromagnet. At this time, the permanent magnet 22 located on the moving part 21 has three magnetic pole regions 300 (refer to FIG. 1 ). Figure 5 As shown in Figure b or Figure c). It is a common prior art that the magnetic suspension linear motor adopts a single-coil electromagnet or a double-coil electromagnet structure, so it will not be described here.

[0057] Please continue to combine Figure 1 and Figure 2 The magnetic suspension linear motor further includes an upper bracket 41 and a lower bracket 42. The upper bracket 41 is mounted on the top of the mover assembly 2 and is fixedly connected to the bottom of the core 11. The lower bracket is surrounded by the bottom of the core 11 and is fixedly connected to the bottom of the core 11.

[0058] The lower bracket 42 has a notch 400 at a position corresponding to the spring sheet 31. The length of the spring sheet 31 is greater than the length of the positioning slot 112. Both ends of the spring sheet 31 are inserted into the notch 400. The lower bracket 42 is supported on the side of the core 11 near the positioning slot 112.

[0059] The second embodiment of the present invention provides a hair cutting device (not shown), which includes the magnetic suspension linear motor provided in the first embodiment. The hair cutting device of the present invention may include shavers, electric clippers, hair trimmers and other electrical devices using a linear motion mechanism.

[0060] Compared with the prior art, the magnetic suspension linear motor and hair cutting device provided by the utility model have the following beneficial effects:

[0061] 1. By setting the spring piece and the positioning piece, the positioning piece is positioned at the end of the moving piece, and one end of the spring piece is fastened to the end of the moving piece in the direction of the moving piece, so that the spring piece itself does not need to be directly welded to the moving piece, avoiding high welding temperature, maintaining the material properties of the spring piece itself, and improving the durability of the product. At the same time, the positioning piece is used to press the spring piece, and the positioning piece is fixed on the moving piece, avoiding the problem of stress concentration and damage to the spring piece caused by direct welding of the spring piece, thereby protecting the spring piece.

[0062] 2. By setting at least two positioning columns passing through the through holes of the spring sheet and the positioning member, the two positioning columns are mutually opened outward to tension the positioning member and the spring sheet, so that the positioning member and the spring sheet can be tightly fixed on the end surface of the moving member.

[0063] 3. By setting two positioning members to clamp the spring sheet in the middle, the spring sheet is pressed and fixed by the positioning members on both sides of the moving direction of the moving member, which can avoid the problem of unstable unidirectional fixation of the spring sheet caused by the uneven surface of the positioning member shell and other problems, and further improve the stability of the spring sheet fixation.

[0064] 4. By setting the moving part as an integrated structure of the magnetizer, directly connecting the two ends of the magnetizer to the elastic component and fixing the magnet at the bottom, compared with the traditional method of using a shell, the moving part of this solution reduces the shell structure, and the moving part directly serves as the shell function and the magnetic function of the magnetizer, simplifying the product components.

[0065] 5. By separately setting a permanent magnet on a moving part and adopting magnetization, the permanent magnet is provided with at least two magnetic pole regions on the side surface facing the stator assembly. Compared with the traditional method of using multiple permanent magnets, the single permanent magnet in this scheme can further reduce the number of product parts and improve product assembly efficiency.

[0066] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A magnetic suspension linear motor, characterized in that: It comprises a stator assembly, a mover assembly and an elastic assembly, wherein the elastic assembly is respectively connected to the stator assembly and the mover assembly, and the mover assembly is arranged at one end of the stator assembly; The movable subassembly includes a moving member, the elastic assembly includes a spring sheet and at least one positioning member, one end of the spring sheet is positioned at the stator assembly, and the other end is connected to the end of the moving member in the moving direction; At least one of the positioning members is positioned at an end of the moving member to fasten one end of the elastic sheet to the end of the moving member in a direction toward the moving member.

2. The magnetic suspension linear motor as claimed in claim 1, characterized in that: Through holes are provided on the positioning member and the spring sheet, and a protruding positioning column is provided at the end of the moving member, and the positioning column passes through the through holes on the spring sheet and the positioning member.

3. The magnetic suspension linear motor as claimed in claim 2, characterized in that: The number of the positioning posts is at least two, and the at least two positioning posts are respectively abutted against different positions of the through hole; At least two of the positioning posts are opened outwardly from the end of the moving member and away from each other, so as to pre-tighten the elastic sheet and the positioning member on the moving member.

4. The magnetic suspension linear motor as claimed in claim 2, characterized in that: At least the contact position of the positioning piece located at the outermost side and the positioning column is welded and fixed.

5. The magnetic suspension linear motor as claimed in claim 2, characterized in that: The positioning column is on the end surface of the moving member, and a step is formed between the moving member and the moving member; The positioning member or the elastic sheet passes through the positioning column and is held against the step.

6. The magnetic suspension linear motor as claimed in claim 1, characterized in that: The contact area of ​​the positioning member pressing the spring sheet is greater than or equal to the contact area of ​​the spring sheet at the end.

7. The magnetic suspension linear motor as claimed in claim 1, characterized in that: The stator assembly includes an iron core and a coil, the iron core includes at least one magnetic shoe column, and one coil is wound around one magnetic shoe column to form at least one magnetic shoe group; One end of the spring sheet away from the mover assembly is positioned on the iron core.

8. The magnetic suspension linear motor as claimed in claim 7, characterized in that: The iron core is provided with a positioning groove at the position of the spring sheet, and one end of the spring sheet away from the moving part is inserted into the positioning groove.

9. The magnetic suspension linear motor according to any one of claims 1 to 8, characterized in that: There are two positioning members, the ends of the spring sheet are clamped between the two positioning members, and the positioning member far away from the moving member is fixedly connected to the moving member.

10. A hair cutting device, characterized in that: Comprising the magnetic levitation linear motor as described in claim 9.

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