Three-mover linear motor

Abstract

The utility model relates to linear motor technical field especially discloses a three dynamic linear motor, including support frame, stator unit, dynamic unit and spring assembly of setting on support frame, dynamic unit includes two first dynamic, a second dynamic and with two first dynamic cooperation and connects dynamic joint spare, second dynamic is located between two first dynamic, and first dynamic realizes linkage with second dynamic through linkage structure, is equipped with the hole of giving room on dynamic joint spare, and dynamic unit still includes the swing subassembly of setting on second dynamic, swing subassembly activity is equipped with in the hole of giving room and uses with the cooperation of the driven part, spring assembly includes two spring spare of being located in the both sides of dynamic unit, and one end of spring spare is opposite and touches dynamic unit, the other end is opposite and touches support frame, and spring spare is used for driving dynamic unit reset, spring assembly is equipped with three groups, and two first dynamic respectively correspond first group spring assembly, second group spring assembly, and swing subassembly corresponds third group spring assembly.

Description

Technical Field

[0001] This utility model relates to the field of linear motor technology, and in particular discloses a three-movement linear motor. Background Technology

[0002] In the existing structural design of linear motors, such as the single-acting subsystem used in shavers and hair clippers, there are usually problems such as structural imbalance, large inertia, low return control accuracy, and discontinuous elastic feedback path. Especially in systems that require multiple actuators to work in alternating links, traditional motors are difficult to achieve multi-point synchronous control and stable rebound through the structural body, resulting in control delay, energy loss, and easy failure.

[0003] Furthermore, the thickness of the linkage block used in existing technologies to connect the drive shaft and the mover is relatively small, resulting in insufficient strength and making it prone to deformation or even breakage after prolonged use. Therefore, how to integrate multiple movers, achieve stable return stroke, and create a more stable linkage structure in a linear motor within a limited installation space is a pressing problem that needs to be solved in this technical field. Utility Model Content

[0004] In order to overcome the technical problems of existing multi-movement motors, which are difficult to achieve multi-point synchronous control and stable rebound through the structural body, resulting in control delay, energy loss and easy failure, the purpose of this utility model is to provide a linear motor with integrated multi-movement, stable return and linkage structure for greater stability.

[0005] To achieve the above objectives, this utility model provides a three-moving linear motor, comprising a support frame, a stator unit mounted on the support frame, a moving unit cooperating with the stator unit, and a spring assembly cooperating with the moving unit; the moving unit includes two first moving parts movably mounted on the same side of the stator unit, a second moving part, and a moving part assembly cooperating with and connected to the two first moving parts, the second moving part being located between the two first moving parts; the first moving parts are linked with the second moving part via a linkage structure;

[0006] The mover assembly is provided with a clearance hole. The mover unit also includes a swing assembly disposed on the second mover. The swing assembly is movably accommodated in the clearance hole and passes through the clearance hole to cooperate with the stator unit. The spring assembly includes two spring members located on both sides of the mover unit. One end of the spring member abuts against the mover unit, and the other end of the spring member abuts against the support frame. The spring member is used to drive the mover unit to reset. There are three sets of spring assemblies. The two first movers correspond to the first set of spring assemblies and the second set of spring assemblies, respectively, and one swing assembly corresponds to the third set of spring assemblies.

[0007] Furthermore, the swing assembly includes a swing block connected to the second mover and a main drive shaft disposed on the swing block. The linkage structure includes a linkage block. The first end of the linkage block is connected to the mover assembly via a secondary drive shaft. The second end of the linkage block is connected to the main drive shaft. The middle part of the linkage block is rotatably connected to the support frame via a limiting shaft.

[0008] When the stator unit is powered on, it drives two first movers to move forward and a second mover to move in the opposite direction. The two moving first movers drive the mover assembly to move forward. The moving mover assembly drives the first end of the linkage block to rotate forward via the auxiliary drive shaft. The second end of the rotating linkage block exerts a force on the main drive shaft to move in the opposite direction via the limit shaft. The moving main drive shaft drives the second mover to move in the opposite direction via the swing block. The swing block that moves in the opposite direction compresses the spring assembly. When the stator unit is de-energized, the spring assembly corresponding to the swing assembly is used to release the elastic force to drive the swing assembly to drive the second end of the linkage block to move forward, so that the swing assembly and the linkage block rotate around the limit shaft to reset.

[0009] Furthermore, the thickness t of the linkage block along the axial direction parallel to the main drive shaft is ≥6mm.

[0010] Furthermore, when the swing assembly drives the second end of the linkage block to rotate forward to the farthest distance, a distance m is formed between the central axis of the main drive shaft and the central axis of the limiting shaft, where 1mm≤m≤2mm. When the swing assembly drives the second segment of the linkage block to rotate in the opposite direction to the farthest distance, a distance n is formed between the central axis of the limiting shaft and the central axis of the main drive shaft, where 1mm≤n≤2mm.

[0011] Furthermore, the moving part has a first protrusion, on which a first clearance groove is provided for accommodating the first end of the linkage block, and the swing block has a second clearance groove for accommodating the second end of the linkage block. Both the first clearance groove and the second clearance groove are U-shaped.

[0012] Furthermore, the first clearance groove has a first inclined surface on each of its two side walls, and the second clearance groove has a second inclined surface on each of its two side walls. The two first inclined surfaces intersect to form a V-shaped first opening, and the two second inclined surfaces intersect to form a V-shaped second opening. The first opening and the second opening are arranged opposite to each other, and clearance gaps q are provided between the first inclined surface and the linkage block, and between the second inclined surface and the linkage block.

[0013] Furthermore, the moving part assembly includes a first plate and a second protrusion disposed on the first plate. The first protrusion is disposed on the first plate and corresponds to one first moving part, and the second protrusion corresponds to another first moving part. The clearance hole is disposed through the first plate and located between the first protrusion and the second protrusion.

[0014] Furthermore, the support frame includes a bottom support, a first frame disposed on one side of the bottom support, and a second frame disposed on the other side of the bottom support. The stator unit is disposed on the bottom support. The first frame is provided with two support arms, and the support arms are provided with multiple rivets for limiting the spring components. Limiting rings are provided on both sides of the first protrusion, both sides of the swing block, and both sides of the second protrusion. The number of rivets is the same as the number of limiting rings. A spring component is clamped between each set of limiting rings and rivets.

[0015] Furthermore, the first mover includes a first magnetic yoke and a first magnet and a second magnet disposed on the first magnetic yoke, and the second mover includes a second magnetic yoke and a third magnet and a fourth magnet disposed on the second magnetic yoke; the mover unit also includes two first connectors and a second connector, the first connectors being connected between the first magnetic yoke and the mover assembly, and the second connectors being connected in cooperation with the second magnetic yoke and the swing assembly.

[0016] Furthermore, the moving part unit also includes a spring sheet assembly, which includes elastic sheets symmetrically arranged on both sides of the stator unit. One end of the elastic sheet is disposed on the bottom support, and the other end of the elastic sheet is connected to the moving part unit. The elastic sheet has two first elastic arms and one second elastic arm. The second elastic arm is located between the two first elastic arms. The free end of one first elastic arm is connected to a first connector, and the free end of the second elastic arm is connected to the second connector.

[0017] The beneficial effects of this utility model are as follows: This utility model proposes a three-moving linear motor, which is configured with a first moving part, a second moving part, and a third moving part. The two first moving parts are located on the outer side of the structure and connected by a moving part assembly. The second moving part is located in the middle and is provided with a swinging component. The swinging component passes through the clearance hole on the moving part assembly to form a cross-moving connection structure. Three sets of spring assemblies correspond to the three sets of moving parts respectively. Under the magnetic drive of the stator unit, the second moving part drives the linkage block to rotate around the limit axis to realize the yaw action. Then, through the main drive shaft, the auxiliary drive shaft, and the moving part assembly, the first moving parts on both sides are driven to respond in coordination, thereby realizing the staggered linkage and synchronous rebound of the three moving parts.

[0018] The thickness setting of the linkage block further enhances its resistance to deformation, ensuring the transmission stability of the moving part and the main drive shaft.

[0019] In addition, the spring assembly not only provides the restoring force after offset, but also achieves structural positioning stability through rivets and limiting protrusions; together with the first and second clearance grooves provided on the mover assembly and the swing block, both grooves are provided with V-shaped openings to ensure that the linkage block has sufficient clearance space when swinging back and forth, avoids structural jamming, and further improves the service life and linkage accuracy of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the three-moving linear motor of this utility model.

[0021] Figure 2 This is a schematic diagram of the exploded state structure of the three-moving linear motor of this utility model;

[0022] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0023] Figure 4 This is a schematic diagram of the structure of the three-moving linear motor of this utility model after removing the first frame and the second frame;

[0024] Figure 5 This is a schematic diagram of the structure of the elastic sheet and the moving part unit of this utility model in cooperation and connection;

[0025] Figure 6 This is a schematic diagram of the structure of the second frame and the linkage block of this utility model.

[0026] Figure 7 This is a schematic diagram of the structure of the present invention when the two first moving parts are connected to the moving part assembly through two first connecting parts;

[0027] Figure 8 This is a schematic diagram showing the structure of the second moving part, the second connecting part, and the swing assembly of this utility model in cooperation and connection.

[0028] Figure 9 This is a schematic diagram of the linkage block of this utility model;

[0029] Figure 10 This is a planar schematic diagram of the swing distance of the linkage block of this utility model;

[0030] Figure 11 This is a three-dimensional structural diagram of the swing assembly of this utility model when it swings relative to the moving part assembly;

[0031] Figure 12 for Figure 11 A magnified structural diagram of part B in the middle section;

[0032] Figure 13 This is an exploded view of the spring assembly, rivets, and first frame of this utility model.

[0033] The reference numerals in the figures include:

[0034] 1. Support frame; 2. Stator unit; 3. Mover unit; 4. Spring assembly; 11. Bottom support; 111. Edge groove; 21. Stator core; 211. Edge protrusion; 22. Wire frame; 23. Coil winding; 13. First frame; 131. Support arm; 1311. Rivet; 14. Second frame; 15. Support leg; 16. Clearance slot; 31. First mover; 311. First yoke; 312. First magnet; 313. Second magnet; 32. Second mover; 321. Oscillating assembly; 3211. Oscillating block; 3212. Main drive shaft; 3213. Second clearance slot; 3214. Second inclined surface ; 322, Second yoke; 323, Third magnet; 324, Fourth magnet; 33, Moving element assembly; 330, Clearance hole; 331, First plate; 332, First protrusion; 3321, First clearance groove; 3322, First inclined surface; 3323, Annular boss; 333, Second protrusion; 334, Limiting protrusion; 335, Opening groove; 34, Linkage block; 341, U-shaped groove; 35, Secondary drive shaft; 36, Limiting shaft; 37, First connecting piece; 38, Second connecting piece; 39, Elastic sheet; 391, First elastic arm; 3911, Stopping protrusion; 392, Second elastic arm; 41, Spring. Detailed Implementation

[0035] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0036] Please see Figures 1 to 13 As shown, the present invention provides a three-moving linear motor, comprising a support frame 1, a stator unit 2, a moving unit 3, and a spring assembly 4. The support frame 1 is composed of a bottom support 11, a first frame 13, and a second frame 14. The stator unit 2 is mounted on the bottom support 11. Both the first frame 13 and the second frame 14 have two legs 15. The bottom of each leg 15 is bolted to both sides of the bottom support 11, and the top of each leg 15 is bolted to both sides of the stator core 21.

[0037] Preferably, the bottom support 11 is integrally stamped from aluminum alloy. Aluminum alloy has a high strength-to-weight ratio, which can effectively reduce the overall structural weight. At the same time, the stamping process ensures the dimensional accuracy and surface finish of the bottom support 11, improves assembly accuracy and vibration resistance, and is particularly suitable for high-frequency operating environments.

[0038] Specifically, please refer to Figure 2As shown, the stator unit 2 includes a stator core 21, a wire frame 22 mounted on the stator core 21, and coil windings 23 wound on the wire frame 22, used to generate a driving magnetic field after energization. The stator core 21 has an "E" shaped structure, the wire frame 22 is installed in the middle of the stator core 21, and the coil windings 23 are wound on the wire frame 22 with both ends led out to the outside of the support frame 1 through pre-set slots in the wire frame 22.

[0039] Please combine Figure 2 and Figure 3 As shown, in this embodiment, the stator core 21 has a retaining protrusion 211 on both sides of the bottom, and the bottom support 11 has a retaining groove 111 for accommodating the retaining protrusion 211. During assembly, the retaining protrusion 211 of the stator core 21 is slid into the retaining groove 111, and the subsequent steps involve installing the first frame 13 and the second frame 14 with bolts to form the support frame 1.

[0040] Please see Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, the mover unit 3 is disposed on top of the stator unit 2, and includes two first movers 31 and one second mover 32. The two first movers 31 are symmetrically distributed on both sides of the top of the stator unit 2, and the second mover 32 is located between the two first movers 31. The first mover 31 includes a first magnetic yoke 311, a first magnet 312 and a second magnet 313. The second mover 32 includes a second magnetic yoke 322, a third magnet 323 and a fourth magnet 324. These magnets are bonded and fixed to the corresponding magnetic yokes with high-strength adhesive. The two first movers 31 are respectively connected to the bottom sides of the mover assembly 33 through two first connectors 37, and the second mover 32 is connected to the swing assembly 321 through a second connector 38.

[0041] The swing assembly 321, consisting of the swing block 3211 and the main drive shaft 3212, passes through the clearance hole 330 formed in the middle of the mover assembly 33.

[0042] Combination Figure 1 As shown, the top of the first frame 13 and the second frame 14 are each provided with a notch (not shown in the figure). The two notches match to form a clearance slot 16. The clearance slot 16 is connected to the clearance hole 330, and the free end of the main drive shaft 3212 extends out of the clearance slot 16.

[0043] Specifically, please combine Figure 7As shown, the mover assembly 33 includes a first plate 331 and a first protrusion 332 and a second protrusion 333 respectively disposed thereon. The two protrusions respectively mate with the two first movers 31. A clearance hole 330 penetrates the first plate 331 and is located between the first protrusion 332 and the second protrusion 333, allowing the swing assembly 321 to pass through and engage with the linkage block 34. The mover assembly 33 is bolted to two first connecting members 37 and two first magnetic yokes 311.

[0044] Specifically, please combine Figure 4 , Figure 6 , Figure 7 , Figure 9 and Figure 13 As shown, the first mover 3 drives the second mover 32 to move via a linkage structure. The linkage structure includes a linkage block 34. The first end 342 of the linkage block 34 is connected to the mover assembly 33 via a secondary drive shaft 35, and the second end 343 of the linkage block 34 is connected to the main drive shaft 3212. The middle part of the linkage block 34 is hinged to the first frame 14 via a limiting shaft 36, thus forming a structure that can swing along the limiting shaft 36. In actual use, the limiting shaft 36 can be fixed to the corresponding position on the top of the second frame 14 via interference fit, thread, or adhesive.

[0045] Specifically, please continue to combine Figure 4 and Figure 9 As shown, in this embodiment, both ends of the linkage block 34 are provided with U-shaped grooves 341. The two U-shaped grooves 341 respectively accommodate the main drive shaft 3212 and the auxiliary drive shaft 35, thereby realizing the transmission engagement. The design of the U-shaped grooves 341 simplifies the assembly process of the main drive shaft 3212 and the auxiliary drive shaft 35, ensuring the accuracy and stability of the transmission connection. At the same time, the structure of the U-shaped grooves 341 increases the contact area between the shaft and the linkage block 34, enhances the force transmission efficiency, and reduces the risk of wear during long-term use.

[0046] Please see Figure 9 As shown, preferably, the thickness t of the linkage block 34 in the direction parallel to the axis of the main drive shaft 3212 is 6mm. Compared with the linkage block 34 with a thickness of 3mm in the prior art, the linkage block 34 in this embodiment has further improved strength. The thickened linkage block 34 design significantly improves torsional strength and fracture resistance, enhances structural stability in high-frequency reciprocating motion and complex force transmission scenarios, extends service life, and maintains transmission accuracy.

[0047] Please see Figure 8As shown, preferably, the oscillating block 3211 is integrally formed using a metal die-casting process. The metal die-casting process ensures that the oscillating block 3211 has high strength and consistent dimensional accuracy, improving its resistance to deformation and durability. Simultaneously, the integral forming reduces seams and assembly errors, enhancing stability and reliability during transmission, making it particularly suitable for high-frequency oscillation and long-term use conditions.

[0048] Please combine Figure 2 , Figure 10 and Figure 11 As shown, in actual use, when the stator unit 2 is energized and generates an induced magnetic field, the magnetic field acts on the magnets of the first mover 31 and the second mover 32. The magnets cut the induced magnetic field, causing the second mover 32 to move in the opposite direction, while the two first movers 31 move in the forward direction. Since the two first movers 31 are connected by the mover assembly 33, the second mover 32 will oscillate back and forth relative to the mover assembly 33. Furthermore, the second mover 32 generates thrust to drive the oscillating block 3211 to oscillate back and forth, causing the linkage block 34 to rotate back and forth around the limiting axis 36.

[0049] Please combine them together Figure 12 As shown, since the first end 342 of the linkage block 34 is linked to the mover assembly 33 via the auxiliary drive shaft 35, and the second end 343 of the linkage block 34 is linked to the second mover 31 via the main drive shaft 3212, when the linkage block 34 reciprocates around the limiting shaft 36, its first end 342 drives the two first movers 31 to move forward via the mover assembly 33, and its second end 343 drives the second mover to move in the opposite direction via the main drive shaft 3212. After the current is removed, the spring assembly 4 equipped at the position of the second mover 32 provides a reverse elastic force, causing the swing block 3211 to reset, the linkage block 34 to rotate in the opposite direction, and the mover assembly 33 and the two first movers 31 to return to their original positions together.

[0050] Please combine Figure 10 As shown, preferably, throughout the entire process, the swing amplitude of the central axis of the main drive shaft 3212 relative to the limiting shaft 36 is constrained by geometric dimensions: the maximum forward swing distance m is 1.5mm, and the maximum reverse swing distance n is 1.5mm. Through precise geometric constraints, the swing amplitude of the main drive shaft 3212 is limited to within ±1.5mm, ensuring the stability and repeatability of the motion trajectory, reducing mechanical interference and vibration risks, and improving the dynamic response performance and long-term operational reliability of the system in high-frequency reciprocating motion.

[0051] Specifically, please combine Figure 7 , Figure 8 and Figure 12As shown, since the linkage block 34 swings within a certain angle range during its movement, to prevent mechanical interference between its two ends and the moving part assembly 33 and the swing block 3211, this solution provides a first clearance groove 3321 on the first protrusion 332. The first clearance groove 3321 is used to accommodate the first end 342 of the linkage block 34. Correspondingly, a second clearance groove 3213 is provided on the swing block 3211 to accommodate the second end (343) of the linkage block 34. Both the first clearance groove 3321 and the second clearance groove 3213 adopt a "U" shaped structure with the U-shaped opening facing upwards. The groove depth is less than the active height of the top of the linkage block 34, ensuring that it will not collide with the protrusion during the swinging process.

[0052] Preferably, please combine Figure 4 , Figure 7 , Figure 9 and Figure 12 As shown, the bottom wall of the first clearance groove 3321 of the first protrusion 332 is provided with an annular boss 3323. The auxiliary drive shaft 35 is inserted into the annular boss 3323. After the U-shaped groove 341 of the first end 342 of the linkage block 34 is engaged with the auxiliary drive shaft 35, the bottom wall of the linkage block 34 abuts against the annular boss 3323. The setting of the annular boss 3323 can further reduce the friction between the linkage block 34 and the first protrusion 332 of the moving part 33.

[0053] Preferably, please combine Figure 12 As shown, in this embodiment, in order to further avoid interference between the linkage block 34 and the inner walls of the first clearance groove 3321 and the second clearance groove 3213 when the linkage block 34 swings to the limit position, the two side walls of the first clearance groove 3321 are respectively provided with intersecting first inclined surfaces 3322 to form V-shaped openings; the two side walls of the second clearance groove 3213 are respectively provided with second inclined surfaces 3214 (that is, the groove walls of the first clearance groove 3321 and the second clearance groove 3213 are respectively chamfered), which also form V-shaped openings. The two V-shaped openings are arranged facing each other, providing clearance gap q at both ends of the linkage block 34 in the swing direction, so that the linkage block 34 always maintains a state of no contact gap during the large-angle reciprocating motion around the limiting axis 36, effectively reducing the risk of wear and jamming.

[0054] Specifically, please combine Figure 2 , Figure 7 , Figure 8 and Figure 13As shown, to achieve precise positioning of the moving subunit 3 and stable arrangement of the spring assembly 4, two inwardly extending support arms 131 (the support arms 131 are arranged perpendicularly to the legs 15) are provided on the first frame 13. The support arms 131 are integrally formed with the first frame 13. Each support arm 131 is provided with three rivets 1311 for cooperating with the spring component 41. One end of the spring component 41 is sleeved on the rivet 1311, and the other end is sleeved on the limiting protrusion 334. The limiting protrusion 334 is respectively provided on both sides of the first protrusion 332, both sides of the second protrusion 333, and both sides of the swing block 3211, forming axial limiting with the spring component 41 at the corresponding positions.

[0055] The limiting protrusion 334 is an annular protrusion structure, which is evenly distributed on both sides of the first protrusion 332 and the second protrusion 333 corresponding to the two first movers 31, and on both sides of the swing block 3211 corresponding to the second mover 32, so as to achieve axial limiting and guiding cooperation with the spring assembly 4.

[0056] Please combine them together Figure 2 As shown, in the entire structure, each set of spring components 41 is clamped between "rivet 1311 - spring component 41 - limiting protrusion ring 334", realizing stable pre-compression and structural limit control of multiple sets of spring assemblies 4. The number of rivets 1311 is the same as the number of limiting protrusion rings 334, ensuring that each mover maintains symmetrical spring force and consistent limiting position during reciprocating motion, thereby significantly improving the system's rebound consistency and dynamic response performance.

[0057] Please see Figure 2 and Figure 5 As shown in this embodiment, to improve the rebound performance and yaw response efficiency of the mover unit 3, the mover unit 3 further includes two elastic plates 39 symmetrically arranged on both sides of the stator unit 2. The elastic plates 39 adopt an E-shaped structure and are fixed to the left and right sides of the bottom support 11 respectively. Each E-shaped elastic plate 39 consists of two first elastic arms 391 and one second elastic arm 392 arranged in parallel with each other. The second elastic arm 392 is centrally located, and its free end is connected to the second connecting member 38 for linkage with the second mover 32. The two first elastic arms 391 on both sides are respectively connected to the two first connecting members 37, corresponding to the two first movers 31, to realize auxiliary driving and limiting support functions. The three movers (two first movers 31 and one second mover 32) cooperate with the elastic plate 39 structure and the spring assembly 4 to form a stable and reliable reciprocating reset system.

[0058] Please combine Figure 5 , Figure 7 and Figure 8As shown, during the actual assembly process, the end of the first elastic arm 391 is provided with a protruding stop protrusion 3911. During installation, it is embedded into the corresponding opening slot 335 provided on the moving part assembly 33. Then, the elastic arm and the first connecting part 37 are reliably locked by bolts. This not only facilitates assembly but also forms a structural limiting function. The end of the second elastic arm 392 is also provided with a stop protrusion 3911, which is inserted into the preset slot (not shown in the figure) of the second connecting part 38 to form a snap-fit, ensuring linkage rigidity and position constraint.

[0059] Specifically, each pair of first elastic arms 391 is connected to a first mover 31 (first connecting member 37) and works with a set of spring assemblies 4 to achieve sway support. The stable reciprocating motion of the two first movers 31 depends on the coordinated action of the four first elastic arms 391 and the two sets of springs. The two second elastic arms 392 are connected to a second mover 32 (second connecting member 38) and work with another set of spring assemblies 4, so that the sway of the middle second mover 32 has good flexible guidance and elastic return capability.

[0060] Please continue reading. Figure 5 and Figure 7 As shown, the first connecting member 37 has a U-shaped structure and is fixed to the corresponding magnetic yoke and the mover assembly 33 by bolts. The first connecting member 37 is fixed to the first magnetic yoke 311 and the mover assembly 33 by bolts, and the side of the first connecting member 37 is connected to the first elastic arm 391 by bolts. The U-shaped structure provides high rigidity and torsional resistance, ensuring stable force transmission between the first mover 31 and the mover assembly 33, and between the first connecting member 37 and the first elastic arm 391; the bolt fixing method facilitates assembly and disassembly, enhances the reliability and maintenance convenience of the structure, and is suitable for long-term use in high-frequency reciprocating motion scenarios.

[0061] With the above structural arrangement, when the mover unit 3 swings under the magnetic field generated by the stator unit 2, the elastic sheet 39 and the spring 41 provide symmetrical elastic force feedback, which on the one hand pushes the mover to complete the reciprocating motion, and on the other hand provides a rapid and balanced self-resetting capability.

[0062] Combining the above assembly relationship and power path, when the two first movers 31 reciprocate under the action of electromagnetic force, the two first connecting pieces 37 drive the four first elastic arms 391 to bend elastically, and at the same time drive the four spring pieces 41 to compress; when the external force is removed, rapid reset and symmetrical movement are achieved under the combined action of the four first elastic arms 391 and the four spring pieces 41 of the elastic plate 39.

[0063] Compared to traditional mechanisms using eccentric wheel structures and dual-motor drives, this structure completes reciprocating motion through a coordinated three-motor electromagnetic drive, elastic limit, and reset elastic force. This results in less structural wear, lower inertia, significantly improved response frequency and service life, making it suitable for high-frequency start / stop, multi-point linkage, and high-precision positioning scenarios.

[0064] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A three-moving linear motor, comprising a support frame (1), a stator unit (2) disposed on the support frame (1), a moving unit (3) cooperating with the stator unit (2), and a spring assembly (4) cooperating with the moving unit (3); characterized in that: The moving unit (3) includes two first moving parts (31), one second moving part (32), and a moving part assembly (33) that is movably disposed on the same side of the stator unit (2). The second moving part (32) is located between the two first moving parts (31), and the first moving parts (31) are linked with the second moving part (32) through a linkage structure. The moving part assembly (33) is provided with a clearance hole (330). The moving part unit (3) also includes a swing assembly (321) disposed on the second moving part (32). The swing assembly (321) is movably accommodated in the clearance hole (330) and passes through the clearance hole (330) to cooperate with the external drive component. The spring assembly (4) includes two spring members (41) located on both sides of the moving part unit (3). One end of the spring member (41) abuts against the moving part unit (3), and the other end of the spring member (41) abuts against the support frame (1). The spring member (41) is used to drive the moving part unit (3) to reset. The spring assembly (4) is provided in three groups. The two first moving parts (31) correspond to the first group of spring assemblies (4) and the second group of spring assemblies (4), and one swing assembly (321) corresponds to the third group of spring assemblies (4).

2. The three-moving linear motor according to claim 1, characterized in that: The swing assembly (321) includes a swing block (3211) connected to the second mover (32) and a main drive shaft (3212) disposed on the swing block (3211). The linkage structure includes a linkage block (34). The first end (342) of the linkage block (34) is connected to the mover assembly (33) via a secondary drive shaft (35). The second end (343) of the linkage block (34) is connected to the main drive shaft (3212). The middle part of the linkage block (34) is rotatably connected to the support frame (1) via a limiting shaft (36). After the stator unit (2) is energized, it drives two first movers (31) to move forward and the second mover (32) to move in the opposite direction. The moving first movers (31) drive the mover assembly (33) to move forward. The moving mover assembly (33) drives the first end (342) of the linkage block (34) to rotate forward via the auxiliary drive shaft (35). The second end (343) of the rotating linkage block (34) gives the main drive shaft (3212) a reverse movement force via the limit shaft (36). The main drive shaft (3212) drives the second mover (32) to move in the opposite direction via the swing block (3211). The swing block (3211) moves in the opposite direction and compresses the spring assembly (4). After the stator unit (2) loses power, the spring assembly (4) corresponding to the swing assembly (321) is used to release the elastic force to drive the swing assembly (321) to drive the second end (343) of the linkage block (34) to rotate in the forward direction, so that the swing assembly (321) and the linkage block (34) rotate around the limit shaft (36) to reset.

3. The three-moving linear motor according to claim 2, characterized in that: The thickness t of the linkage block (34) along the axial direction parallel to the main drive shaft (3212) is ≥6mm.

4. The three-moving linear motor according to claim 2, characterized in that: When the swing assembly (321) drives the second end (343) of the linkage block (34) to rotate forward to the farthest distance, a distance m is formed between the central axis of the main drive shaft (3212) and the central axis of the limiting shaft (36), where 1mm≤m≤2mm. When the swing assembly (321) drives the second end (343) of the linkage block (34) to rotate in the opposite direction to the farthest distance, a distance n is formed between the central axis of the limiting shaft (36) and the central axis of the main drive shaft (3212), where 1mm≤n≤2mm.

5. The three-moving linear motor according to claim 2, characterized in that: The moving part (33) has a first protrusion (332), the first protrusion (332) is provided with a first clearance groove (3321) for accommodating the first end (342) of the linkage block (34), and the swing block (3211) has a second clearance groove (3213) for accommodating the second end (343) of the linkage block (34).

6. The three-moving linear motor according to claim 5, characterized in that: The first clearance groove (3321) has a first inclined surface (3322) on both side walls, and the second clearance groove (3213) has a second inclined surface (3214) on both side walls. A clearance gap q is formed between the first inclined surface (3322) and the linkage block (34), and between the second inclined surface (3214) and the linkage block, for the linkage block (34) to swing.

7. The three-moving linear motor according to claim 5, characterized in that: The moving part assembly (33) includes a first plate (331) and a second protrusion (333) disposed on the first plate (331). The first protrusion (332) is disposed on the first plate (331). The clearance hole (330) passes through the first plate (331) and is disposed between the first protrusion (332) and the second protrusion (333).

8. The three-moving linear motor according to claim 7, characterized in that: The support frame (1) includes a bottom support (11), a first frame (13) disposed on one side of the bottom support (11), and a second frame (14) disposed on the other side of the bottom support (11). The stator unit (2) is disposed on the bottom support (11). The first frame (13) is provided with two support arms (131). The support arms (131) are provided with a plurality of rivets (1311) for limiting the spring (41). Limiting rings (334) are provided on both sides of the first protrusion (332), both sides of the swing block (3211), and both sides of the second protrusion (333). The number of rivets (1311) is the same as the number of limiting rings (334). A spring (41) is clamped between each set of limiting rings (334) and rivets (1311).

9. The three-moving linear motor according to claim 1, characterized in that: The first mover (31) includes a first yoke (311) and a first magnet (312) and a second magnet (313) disposed on the first yoke (311). The second mover (32) includes a second yoke (322) and a third magnet (323) and a fourth magnet (324) disposed on the second yoke (322). The mover unit (3) also includes two first connectors (37) and a second connector (38). The first connectors (37) are connected between the first yoke (311) and the mover assembly (33). The second connectors (38) are connected to the second yoke (322) and the swing assembly (321).

10. The three-moving linear motor according to claim 9, characterized in that: The moving subunit (3) also includes two elastic plates (39) symmetrically arranged on both sides of the stator unit (2). The moving subunit (3) is movably arranged relative to the support frame (1) via the elastic plates (39). One end of the elastic plate (39) is set on the bottom support (11), and the other end of the elastic plate (39) is connected to the moving subunit (3). The elastic sheet (39) has two first elastic arms (391) and one second elastic arm (392). The second elastic arm (392) is located between the two first elastic arms (391). The free end of one first elastic arm (391) is connected to a first connector (37), and the free end of the second elastic arm (392) is connected to the second connector (38).

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