A stable performance magnetic suspension linear motor

Abstract

This invention provides a stable magnetic levitation linear motor, comprising a housing, a cover, a permanent magnet, and a stator assembly. The housing has a mounting base at its lower part, with a mounting opening, a positioning groove, and multiple fixing barbs. Multiple positioning protrusions extend from the outer side of the electromagnet of the stator assembly, and these protrusions are embedded in the positioning groove. The top of the cover has multiple elastic fastening frames adapted to the fixing barbs. When the cover is fastened to the housing, the elastic fastening frames lock with the fixing barbs, and the cover presses the positioning protrusions tightly within the positioning groove. Thus, the stator assembly is fixed in one step by fastening the cover, simplifying the assembly process. Furthermore, the use of elastic fastening frames to fasten the fixing barbs provides all-around restriction of wobbling, resulting in better fixation performance, more balanced force distribution during motor operation, and more stable overall performance.

Description

Technical Field

[0001] This utility model relates to the field of linear motors, specifically to a stable magnetic levitation linear motor. Background Technology

[0002] Magnetic levitation linear motors operate on the principle of repulsion and attraction between the stator and actuator. A magnetic field is generated, levitizing the actuator and simultaneously producing propulsion to move it in this levitation state. The magnetic levitation design reduces friction, allowing the motor to reach higher speeds while lowering operating noise and vibration, improving cleaning performance and user comfort.

[0003] However, current magnetic levitation linear motors, such as the patented CN2812401Y linear oscillation driver and CN101803159A vibration linear actuator, have stator assemblies with electromagnets that are fixed by multiple bolts and housings, making assembly relatively complicated. Although some subsequent products have been equipped with covers, these covers are mainly used for stator assembly wires, and the stator assembly and housing are still mainly fixed by screws.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] This invention provides a stable magnetic levitation linear motor to solve at least one of the aforementioned technical problems.

[0006] To address the aforementioned issues, a stable magnetic levitation linear motor is provided, comprising a housing, a cover, a permanent magnet, and a stator assembly.

[0007] The lower part of the housing is provided with a mounting base, the bottom of which is provided with a mounting opening and a positioning groove communicating with the mounting opening. The side wall of the mounting base is provided with multiple fixing barbs. The stator assembly includes an electromagnet and multiple positioning protrusions extending from the outside of the electromagnet. The positioning protrusions are embedded in the positioning groove. The permanent magnet is provided on the actuating plate on the upper part of the housing, and the actuating plate can move horizontally back and forth. The top of the cover is provided with multiple elastic fastening frames adapted to the fixing barbs. When the cover is fastened to the housing, the elastic fastening frames are locked with the fixing barbs, and the cover presses the positioning protrusions and confines them in the positioning groove. The electromagnet is used to generate a magnetic field that interacts with the permanent magnet, so that the permanent magnet drives the actuating plate to reciprocate along a linear path relative to the mounting base.

[0008] Preferably, the number of the fixing barbs is at least four, and they are distributed on at least two side walls of the mounting base, and the distributed side walls include at least two opposite side walls.

[0009] Preferably, each of the fixed barbs has at least two fixed barbs on its sidewall.

[0010] Preferably, the fixing barb is a protruding structure with an inclined guide surface and a vertical locking surface; the elastic fastening frame is an elastic rectangular frame with a latch on its inner edge; when fastened, the left and right sidewalls and the vertical locking surface of the fixing barb are respectively attached to the inner edge of the elastic fastening frame.

[0011] Preferably, the elastic deformation direction of the elastic fastening frame is perpendicular to the snapping direction of the vertical locking surface.

[0012] Preferably, the sidewall of the housing is provided with limiting protrusions on both sides of the fixing barb; in the fastened state, the left and right outer sidewalls of the elastic fastening frame are in contact with the limiting protrusions.

[0013] Preferably, the cover is provided with a wiring through hole and at least one wire-locking spring; the wire-locking spring is connected to the cover body at intervals through a connecting part, and the wiring through hole is located below the wire-locking spring.

[0014] Preferably, there are at least four locking springs, and the connecting part is connected to the middle of one side wall of the locking spring.

[0015] Preferably, the housing includes two actuating plates located at the upper part, a mounting base located at the lower part, an elastic sidewall connecting the actuating plates and the mounting base, and an elastic ring connecting the two elastic sidewalls at the same end; the actuating plates can perform horizontal reciprocating movements relative to the mounting base through the elastic sidewalls.

[0016] Preferably, the actuation plate is provided with an output shaft for connecting a razor blade; the stator assembly includes a metal core located in the middle and coil windings located around the metal core.

[0017] The cover of this magnetic levitation linear motor is mechanically locked by a flexible snap-fit ​​frame that engages with the fixing hooks on the side wall of the housing. The positioning groove forms a horizontal constraint on the positioning protrusion. During engagement, the cover presses down, tightly pressing the positioning protrusion of the stator assembly into the positioning groove of the housing, forming a vertical constraint. Thus, the stator assembly is fixed in one step through the cover's engagement, simplifying the assembly process. Furthermore, the flexible snap-fit ​​frame engages with the fixing hooks, and the multiple side walls of the fixing hooks fit snugly against the inner edge of the flexible snap-fit ​​frame, providing comprehensive restriction of wobbling in X, Y, and Z axis translation and rotation. This results in better fixation performance, more balanced force distribution during motor operation, more stable overall performance, and contributes to extending the motor's lifespan.

[0018] Furthermore, by setting at least four positioning protrusions and a cooperating structure with elastic fastening frames, four symmetrically distributed fastening frames tightly surround four barbs. The barbs are "framed" inside, and their sidewalls form a direct, large-area contact constraint with the inner wall of the elastic fastening frame. This greatly reduces the horizontal gap, allowing the movement of the cover in the horizontal plane (left and right, front and back) to be actively restricted by the inner wall of the elastic fastening frame, significantly reducing translational swaying in the X / Y axis directions. The four symmetrically distributed fastening points also constitute a stable support system. When the cover attempts to twist, such as when one corner is raised, the barb corresponding to that corner will pull its corresponding fastening frame upwards and outwards. The frame structure of the fastening frame has better torsional stiffness, and because it is a four-point symmetrical constraint, the diagonal fasteners restrain each other, forming a force couple to resist torsional deformation, thereby effectively suppressing the up-and-down swaying of the corner caused by rotation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a stable magnetic levitation linear motor according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the second-view structure;

[0021] Figure 3 yes Figure 1 A diagram illustrating the third-person perspective;

[0022] Figure 4 yes Figure 1 A schematic diagram of the hidden cover structure;

[0023] Figure 5 yes Figure 1 A schematic diagram of the shell structure;

[0024] Figure 6 yes Figure 1 A schematic diagram of the cover.

[0025] Figure label:

[0026] 1. Housing; 11. Mounting base; 111. Mounting opening; 112. Positioning groove; 113. Fixing barb; 12. Actuating plate; 13. Elastic sidewall; 14. Elastic ring; 114. Limiting flange; 2. Cover; 21. Elastic fastening frame; 22. Wiring through hole; 23. Wire clamping spring; 231. Connecting part; 3. Permanent magnet; 4. Stator assembly; 41. Electromagnet; 42. Positioning protrusion; 43. Metal core; 44. Coil winding; 5. Output shaft. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0030] Please refer to Figures 1 to 6 A stable magnetic levitation linear motor, mainly used in high-frequency vibration devices such as shavers. It mainly includes a housing 1, a cover 2, a permanent magnet 3, and a stator assembly 4.

[0031] The lower part of the housing 1 is provided with a mounting base 11, the bottom of the mounting base 11 is provided with a mounting opening 111 and a positioning groove 112 communicating with the mounting opening 111, and the side wall of the mounting base 11 is provided with a plurality of fixing barbs 113; the stator assembly 4 includes an electromagnet 41 and a plurality of positioning protrusions 42 extending from the outside of the electromagnet 41, and the positioning protrusions 42 are embedded in the positioning groove 112;

[0032] The permanent magnet 3 is mounted on the actuating plate 12 on the upper part of the housing 1, and the actuating plate 12 can move horizontally back and forth; the top of the cover 2 is provided with a plurality of elastic fastening frames 21 that are adapted to the fixed barb 113.

[0033] When the cover 2 is fastened to the housing 1, the elastic fastening frame 21 is locked with the fixing hook 113, and the cover 2 presses and confines the positioning protrusion 42 within the positioning groove 112. During installation, the positioning protrusion 42 of the stator assembly 4 is aligned with the positioning groove 112 at the bottom of the mounting base 11 of the housing 1 and inserted, so that the electromagnet 41 is suspended in the mounting opening 111. At this time, the positioning groove 112 restricts the horizontal displacement of the stator assembly 4.

[0034] The permanent magnet 3 is fixed above the actuating plate 12 of the housing 1 and has a certain gap with the electromagnet 41. The actuating plate 12 is connected to the bottom mounting base 11 through the elastic sidewall 13, forming a suspended movable structure. The electromagnet 41 is used to generate a magnetic field that interacts with the permanent magnet 3, so that the permanent magnet 3 drives the actuating plate 12 to reciprocate along a linear path relative to the mounting base 11.

[0035] The cover 2 of the magnetic levitation linear motor of this invention is mechanically locked by engaging with the fixing hooks 113 on the side wall of the housing 1 via an elastic fastening frame 21. The positioning groove 112 forms a horizontal constraint on the positioning protrusion 42. When the cover 2 is engaged, it presses down, pressing the positioning protrusion 42 of the stator assembly 4 tightly into the positioning groove 112 of the housing 1, forming a vertical constraint. Thus, the stator assembly 4 is fixed in one step by engaging the cover 2, simplifying the assembly process. Furthermore, the elastic fastening frame 21 engages with the fixing hooks 113, and the multiple side walls of the fixing hooks 113 fit against the inner edge of the elastic fastening frame 21, providing an all-round restriction of swaying in X, Y, and Z axis translation and rotation. This results in better fixation performance, more balanced force during motor operation, more stable overall performance, and helps to extend the motor's lifespan.

[0036] Preferably, the number of fixing barbs 113 is at least four, and they are distributed on at least two side walls of the mounting base 11, with the distributed side walls including at least two opposite side walls. Further, at least four fixing barbs 113 are symmetrically distributed on opposite side walls of the housing 1, forming a multi-point balanced constraint.

[0037] Each of the aforementioned fixing barbs 113 has at least two fixing barbs 113 on its side wall. This prevents the cover 2 from slightly moving in the horizontal direction or twisting in the vertical direction, reduces abnormal noise caused by vibration, and improves the stability of the magnetic levitation linear motor.

[0038] By setting at least four positioning protrusions 42 and the engaging structure of the elastic fastening frame 21, the four symmetrically distributed elastic fastening frames 21 tightly surround the four fixed hooks 113. The fixed hooks 113 are "framed" inside, and their sidewalls form a direct, large-area contact constraint with the inner wall of the elastic fastening frame 21. This greatly reduces the horizontal gap, so that the movement of the cover 2 in the horizontal plane (left and right, front and back) is actively restricted by the inner wall of the elastic fastening frame 21, significantly reducing translational swaying in the X / Y axis direction. Furthermore, the four symmetrically distributed fastening points constitute a stable support system. When the cover 2 attempts to twist, such as when a corner is raised, the fixed hook 113 corresponding to that corner will pull the elastic fastening frame 21 it is located on upward and outward. The frame structure of the elastic fastening frame 21 has better torsional stiffness, and because it is a four-point symmetrical constraint, the diagonal fasteners will restrain each other, forming a couple to resist torsional deformation, thereby effectively suppressing the up-and-down swaying of the corner caused by rotation.

[0039] Please refer to Figure 5 and Figure 6 The fixing hook 113 is a protruding structure with an inclined guide surface and a vertical locking surface. The inclined guide surface guides the elastic fastening frame 21 to slide in, the vertical locking surface provides rigid locking, the inclined guide surface reduces assembly resistance, and the vertical surface ensures locking force. The elastic fastening frame 21 is an elastic rectangular frame with a latch on its inner edge. When fastened, the left and right sidewalls and the vertical locking surface of the fixing hook 113 are respectively attached to the inner edge of the elastic fastening frame 21. The latch on the inner edge of the rectangular frame wraps around the fixing hook 113, and the attachment of the left and right sidewalls restricts horizontal displacement. The attachment of the left and right sidewalls can better eliminate horizontal gaps and suppress shaking.

[0040] This allows the elastic fastening frame 21 on the top of the cover 2 to be aligned with the fixing hook 113 on the side wall of the mounting base 11 and pressed vertically. The elastic fastening frame 21 is guided outward by the inclined guide surface of the fixing hook 113 and elastically deforms until it completely wraps around the fixing hook 113 and then springs back to lock.

[0041] Preferably, the elastic deformation direction of the elastic fastening frame 21 is perpendicular to the snapping direction of the vertical locking surface. This ensures that the elastic fastening frame 21 deforms smoothly when pressed, and that the rebound force is maximized on the vertical locking surface after fastening, thereby improving the reliability of the locking mechanism.

[0042] Preferably, the sidewall of the housing 1 is provided with limiting protrusions 114 on both sides of the fixing barb 113; in the fastened state, the left and right outer sidewalls of the elastic fastening frame 21 are in contact with the limiting protrusions 114. Thus, in the fastened state, the limiting protrusions 114 of the sidewall of the housing 1 press against the outer side of the elastic fastening frame 21, blocking the transmission of lateral deformation.

[0043] Preferably, the cover 2 is provided with a wiring through hole 22 and at least one wire clamping spring 23; the wire clamping spring 23 is connected to the main body of the cover 2 at intervals via a connecting part 231, and the wiring through hole 22 is located below the wire clamping spring 23. The wiring through hole 22 guides the stator assembly 4 wires to pass through; the wire clamping spring 23 presses down on the cable to prevent it from loosening.

[0044] Preferably, there are at least four wire-clamping springs 23, and the connecting portion 231 is connected to the middle of one side wall of the wire-clamping spring 23. The connecting portion 231 is located in the middle of the side wall to ensure uniform pressure distribution and avoid cable bending damage. Furthermore, wires can be routed on both the left and right sides of the connecting portion 231. The wires of the stator assembly 4 pass through the wire routing holes 22 in the cover 2. The at least four wire-clamping springs 23 can be used to clamp and fix the wires in a categorized manner, preventing the wires from becoming messy and disorderly.

[0045] In this embodiment, the four wire-clamping springs 23 are arranged in a matrix, covering the entire circumference of the cable. The centrally located connection part 231 allows the springs to deform evenly, avoiding local stress damage to the cable.

[0046] In this embodiment, the housing 1 includes two actuating plates 12 located at the upper part, a mounting base 11 located at the lower part, elastic sidewalls 13 connecting the actuating plates 12 and the mounting base 11, and elastic rings 14 connected to the two elastic sidewalls 13 at the same end. The actuating plates 12 can reciprocate horizontally relative to the mounting base 11 through the elastic sidewalls 13. The actuating plates 12 and the mounting base 11 are connected by the elastic sidewalls 13, and the sidewalls at the same end are tightened by the elastic rings 14. The elastic sidewalls 13 and the elastic rings 14 provide restoring force to assist the actuating plates 12 in reciprocating motion and resetting. When applied to shavers, this can improve the high-frequency cutting stability of the shaver.

[0047] Please refer to Figure 3 and Figure 4 The actuation plate 12 is provided with an output shaft 5, which is used to connect the razor blade; the stator assembly 4 includes a metal core 43 located in the middle and a coil winding 44 located around the metal core 43, and the output shaft 5 directly converts the linear vibration into the blade cutting motion.

[0048] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.

Claims

1. A stable magnetic levitation linear motor, characterized in that, Includes housing, cover, permanent magnets, and stator assembly; The lower part of the housing is provided with a mounting base, the bottom of the mounting base is provided with a mounting opening and a positioning groove communicating with the mounting opening, and the side wall of the mounting base is provided with multiple fixing barbs; The stator assembly includes an electromagnet and a plurality of positioning protrusions extending from the outside of the electromagnet, the positioning protrusions being embedded in the positioning groove; The permanent magnet is mounted on the actuating plate on the upper part of the housing, and the actuating plate can move horizontally back and forth. The top of the cover is provided with multiple elastic fastening frames that are adapted to the fixing barbs; When the cover is fastened to the housing, the elastic fastening frame is locked to the fixing barb, and the cover presses the positioning protrusion into the positioning groove. The electromagnet is used to generate a magnetic field that interacts with the permanent magnet, so that the permanent magnet drives the actuator plate to reciprocate along a linear path relative to the mounting base.

2. The high-performance magnetic levitation linear motor according to claim 1, characterized in that, The number of fixed barbs is at least four, and they are distributed on at least two side walls of the mounting base, and the side walls to which they are distributed include at least two opposite side walls.

3. The high-performance magnetic levitation linear motor according to claim 2, characterized in that, Each of the aforementioned fixed barbs has at least two fixed barbs on its sidewall.

4. The high-performance magnetic levitation linear motor according to claim 1, characterized in that, The fixing barb is a protruding structure with an inclined guide surface and a vertical locking surface; The elastic fastening frame is an elastic rectangular frame with a snap-fit ​​opening on its inner edge; When fastened, the left and right sidewalls and vertical locking surface of the fixed barb are respectively attached to the inner edge of the elastic fastening frame.

5. The high-performance magnetic levitation linear motor according to claim 4, characterized in that, The elastic deformation direction of the elastic fastening frame is perpendicular to the snapping direction of the vertical locking surface.

6. The high-performance magnetic levitation linear motor according to claim 4, characterized in that, The sidewall of the housing is provided with limiting protrusions on both sides of the fixed barb; in the fastened state, the left and right outer sidewalls of the elastic fastening frame are in contact with the limiting protrusions.

7. The high-performance magnetic levitation linear motor according to claim 1, characterized in that, The cover is provided with a wiring through hole and at least one wire-locking spring; the wire-locking spring is connected to the cover body at intervals through a connecting part, and the wiring through hole is located below the wire-locking spring.

8. The high-performance magnetic levitation linear motor according to claim 7, characterized in that, There are at least four locking springs, and the connecting part is connected to the middle of one side wall of the locking spring.

9. The high-performance magnetic levitation linear motor according to claim 1, characterized in that, The housing includes two actuating plates at the upper part, a mounting base at the lower part, elastic sidewalls connecting the actuating plates and the mounting base, and elastic rings connecting the two elastic sidewalls at the same end; the actuating plates can reciprocate horizontally relative to the mounting base through the elastic sidewalls.

10. The high-performance magnetic levitation linear motor according to claim 9, characterized in that, The actuation plate is provided with an output shaft, which is used to connect to the razor blade; the stator assembly includes a metal core located in the middle and a coil winding located around the metal core.

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