Magnet-focused trackless linear motor

Abstract

This utility model discloses a magnetizing trackless linear motor. The magnetizing trackless linear motor includes a stator structure and a mover structure. The stator structure includes a stator yoke extending laterally and multiple stator modulation teeth arranged at intervals along the lateral direction on the stator yoke. The mover structure is movably arranged relative to the stator structure along the lateral direction and includes multiple mover units arranged sequentially adjacent to each other along the lateral direction, and multiple magnetizing units corresponding to each mover unit at the end near the stator structure. Each magnetizing unit is at least partially oriented towards each stator modulation tooth, and each magnetizing unit includes multiple magnets, wherein the number of magnets in each magnetizing unit is an odd number greater than or equal to 5. The technical solution provided by this utility model can effectively reduce the leakage flux coefficient and improve the utilization rate of permanent magnet magnetic energy. This results in a more powerful and efficient magnetizing trackless linear motor.

Description

Technical Field

[0001] This utility model relates to the technical field of linear motors, specifically to a magnetically focused, trackless linear motor. Background Technology

[0002] A linear motor is a device that directly converts electrical energy into linear motion mechanical energy without the need for intermediate mechanical transmission mechanisms (such as lead screws, gears, and racks). It is widely used in CNC machine tools, semiconductor equipment, automated production lines, rail transportation, and other fields. Traditional linear motors on the market typically have an armature winding on the mover and permanent magnets installed at intervals on the stator. When three-phase alternating current is applied, the coil on the mover generates an armature magnetic field, which interacts with the magnetic field generated by the permanent magnets on the stator to produce thrust. Traditional linear motors require a magnetic track made of alternating permanent magnets on the stator. Since rare earth elements, the main component of permanent magnets, are scarce and non-renewable resources, covering the stator with permanent magnets for long strokes (over 2 meters) is extremely expensive. Furthermore, permanent magnets generate a strong magnetic field, requiring special tooling and protective gear during stator manufacturing and magnetic shielding during transportation, increasing the additional cost of the motor. The strong magnetic field on the stator also attracts iron filings and dust into the motor during operation, affecting its lifespan. Therefore, it is necessary to improve existing linear motors. Utility Model Content

[0003] Therefore, this utility model aims to solve the problems of high cost, complex processing, and easy inhalation of dust and other debris that affect the lifespan of traditional linear motors.

[0004] To achieve the above objectives, this utility model proposes a magnetically focused, trackless linear motor, comprising:

[0005] The stator structure includes a stator yoke extending laterally, and a plurality of stator modulation teeth disposed on the stator yoke, wherein the plurality of stator modulation teeth are arranged at intervals laterally.

[0006] The moving part structure is movably arranged in the transverse direction relative to the stator structure. The moving part structure includes a plurality of moving parts arranged sequentially adjacent to each other in the transverse direction, and a plurality of magnetic focusing units corresponding to each of the moving parts near the end of the stator structure. Each magnetic focusing unit is at least partially oriented toward each of the stator modulation teeth. Each magnetic focusing unit includes a plurality of magnets, wherein the number of magnets in each magnetic focusing unit is an odd number greater than or equal to 5.

[0007] Optionally, each of the moving parts includes a moving yoke and a moving tooth, and each of the magnetic focusing units is attached to the surface of the corresponding moving tooth; or,

[0008] Each of the moving parts includes a moving yoke, a moving tooth, and a moving pole shoe, and each of the magnetic focusing units is attached to the surface of the corresponding moving pole shoe.

[0009] Optionally, the plurality of magnets are arranged symmetrically along the center line of the vertical direction of the moving element.

[0010] Optionally, the magnetization directions of any two adjacent magnets are the same or at a 90° angle.

[0011] Optionally, the mover pole shoe has a first surface disposed toward the stator structure and a second surface located at both ends of the first surface, and the plurality of magnets includes a plurality of first magnets disposed on the first surface and a plurality of second magnets disposed on the two second surfaces.

[0012] Optionally, the magnet is provided in five parts, including two second magnets and three first magnets located between the two second magnets. The magnetization direction of the two second magnets is the same and is both in the transverse direction. The magnetization direction of the middle first magnet is opposite to that of the second magnet, and the magnetization directions of the other two first magnets are opposite and are both in the vertical direction.

[0013] Optionally, the magnet is provided in seven parts, including two second magnets and five first magnets located between the two second magnets. The magnetization directions of the two second magnets are opposite and both are transverse. The magnetization direction of the first magnet in the middle is vertical, and the magnetization directions of the other four first magnets are symmetrically arranged with respect to the first magnet in the middle.

[0014] Optionally, the stator structure is provided in two sets, and the stator modulation teeth of the two sets of stator structures are arranged at relative intervals along the longitudinal direction;

[0015] The moving part structure is provided in two sets, which are located between the two sets of stator structures, and the moving part yokes of the two sets of moving parts are fitted together. The two magnetic focusing units of the two sets of moving parts are respectively arranged towards the stator modulation teeth of the two sets of stator structures.

[0016] Optionally, the cross-section of each of the stator modulation teeth is rectangular, trapezoidal, or irregular in shape; and / or,

[0017] The cross-section of each stator modulation tooth is rectangular or trapezoidal, and the top of each stator modulation tooth is provided with a first chamfer, which is a single-step, multi-step, arc-shaped, or other irregular shape; and / or,

[0018] Each of the magnets has a second chamfer at one end facing the stator structure. The second chamfer is in the form of a single step, multiple steps, a slope, an arc, or a combination of any two or more of these shapes.

[0019] Optionally, the yokes of the plurality of said moving units are integrally arranged.

[0020] The technical solution provided by this utility model has the following beneficial effects:

[0021] This utility model provides a magnet-focusing trackless linear motor, comprising a stator structure and a mover structure. The stator structure includes a stator yoke and stator modulation teeth. Since permanent magnets are not required in the stator structure, the cost is lower, and the stator structure is easier to manufacture. The mover structure includes multiple mover units, which are magnetically coupled to the stator modulation teeth via an air gap. Each mover unit has a magnet-focusing unit at its end, which concentrates the magnetic field, reduces magnetic leakage, and increases the air gap magnetic flux density and thrust density. Furthermore, by using an odd number of magnets (greater than or equal to 5) in each magnet-focusing unit, a significant magnet-focusing effect is achieved, effectively reducing the magnetic leakage coefficient and improving the utilization rate of the permanent magnet's magnetic energy. This results in a more powerful and efficient magnet-focusing trackless linear motor. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A cross-sectional structural schematic diagram of an embodiment of a magnetically focused, non-magnetic track linear motor provided by this utility model;

[0024] Figure 2 A cross-sectional structural schematic diagram of another embodiment of a magnetically focused, non-magnetic track linear motor provided by this utility model;

[0025] Figure 3 A cross-sectional structural schematic diagram of another embodiment of a magnetically focused, non-magnetic track linear motor provided by this utility model;

[0026] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the magnetically focused, non-magnetic track linear motor described in the figure;

[0027] Figure 5 for Figure 1 Schematic diagrams of multiple embodiments of the stator modulation teeth of the stator structure described herein;

[0028] Figure 6 This is a cross-sectional structural schematic diagram of another embodiment of the magnetic non-magnetic track linear motor (excluding the moving pole shoe) provided by this utility model;

[0029] Figure 7 Schematic diagrams of multiple embodiments of the magnetic focusing unit provided by this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the magnetic focusing unit in multiple embodiments of the magnetic focusing type non-magnetic track linear motor stepless shoe provided by this utility model.

[0031] Explanation of icon numbers:

[0032] 100-Magnetic-focusing linear motor without magnetic tracks; 1-Stator structure; 11-Stator yoke; 12-Stator modulation teeth; 121-First chamfer; 2-Motor structure; 21-Motor yoke; 22-Motor teeth; 23-Motor pole shoe; 24-Magnetic-focusing unit; 241-Second magnet; 242-First magnet; 2421-First near-end magnet; 2422-First far-end magnet; 243-Center magnet; 244-Second chamfer; 25-Coil winding.

[0033] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] This utility model provides a magnetic-focusing, non-magnetic track linear motor 100. For details, please refer to [link / reference]. Figures 1 to 3 In this embodiment, the magnetically focused linear motor 100 includes a stator structure 1 and a mover structure 2. The stator structure 1 includes a stator yoke 11 extending laterally and a plurality of stator modulation teeth 12 disposed on the stator yoke 11, the plurality of stator modulation teeth 12 being spaced apart laterally. The mover structure 2 is movably disposed laterally relative to the stator structure 1. The mover structure 2 includes a plurality of mover units arranged sequentially adjacent to each other laterally and a plurality of magnetically focused units 24 corresponding to one end of each mover unit near the stator structure. Each magnetically focused unit 24 is at least partially oriented toward each stator modulation tooth 12. Each magnetically focused unit 24 includes a plurality of magnets, wherein the number of magnets in each magnetically focused unit 24 is an odd number greater than or equal to 5.

[0038] In this embodiment, the stator structure 1 includes a stator yoke 11 and stator modulation teeth 12. Permanent magnets are not required on the stator structure 1, resulting in lower cost and easier fabrication. The mover structure 2 includes multiple mover units. These mover units are coupled to the stator modulation teeth 12 via an air gap, creating a magnetic field that drives the mover units to move laterally. Furthermore, a magnetic focusing unit 24 is provided at the end of each mover pole piece 23. This unit further concentrates the magnetic field, reducing magnetic leakage and increasing the air gap magnetic flux density and thrust density. Moreover, the number of magnets in each magnetic focusing unit 24 is an odd number (greater than or equal to 5), resulting in a significant magnetic focusing effect, effectively reducing the magnetic leakage coefficient and improving the utilization rate of the permanent magnet's magnetic energy. This leads to a more powerful and efficient overall magnetically focused linear motor 100.

[0039] The stator yoke 11 is elongated and extends laterally. In normal operation of the magnetically focused linear motor 100, "lateral" here refers to the left-right direction. Multiple stator modulation teeth 12 are spaced apart in the left-right direction. These teeth interact with the magnetic field of the mover structure 2 to generate electromagnetic thrust or pull, thereby driving the mover structure 2 to perform linear motion. Both the stator yoke 11 and the stator modulation teeth 12 are made of soft magnetic materials, such as silicon steel sheets, soft magnetic ferrites, and amorphous alloys, which effectively reduce iron losses under alternating magnetic fields.

[0040] The cross-section of each of the stator modulation teeth 12 can be rectangular, trapezoidal or irregular in shape. By optimizing the tooth shape, the tooth groove effect is reduced and the motion accuracy and smoothness are improved.

[0041] Combination Figure 5 As shown, each of the stator modulation teeth 12 has a first chamfer 121 at its top, which can be a single-step, multi-step, arc-shaped, or other irregular shape. By improving the shape of the tooth tip to adjust the air gap magnetic field waveform, the sinusoidal nature of the thrust waveform is improved, and harmonic components are reduced.

[0042] like Figure 7 and Figure 8 As shown, each of the magnets has a second chamfer 244 at one end facing the stator structure 1. The second chamfer 244 is in the form of a single step, multiple steps, a slope, an arc, or a combination of any two or more of these shapes, which can better improve the cogging force and increase the stability of the motor.

[0043] In one implementation, such as Figure 6 As shown, each of the moving parts may include a moving yoke 21 and a moving tooth 22. In this case, each of the magnetic focusing units 24 is attached to the surface of the moving tooth 22. Furthermore, a plurality of magnets may be arranged in parallel on the end face of the moving tooth 22 facing the stator structure 1.

[0044] In another embodiment, combined Figure 1 and Figure 2 As shown, each of the moving parts may include a moving yoke 21, a moving tooth 22, and a moving pole shoe 23, and each of the magnetic focusing units 24 is attached to the surface of the corresponding moving pole shoe 23.

[0045] The arrangement of each magnetic focusing unit 24 on the moving part tooth 22 is similar to that on the moving part pole shoe 23. The following description will take the arrangement of the magnetic focusing unit 24 on the moving part pole shoe 23 as an example.

[0046] Combination Figure 1 and Figure 2 As shown in the figure, n represents the number of the moving units, and n is a natural number greater than 1. The moving yokes 21 of the multiple moving units are integrally arranged, making the manufacturing of the moving yokes 21 simpler and more convenient. The multiple magnets of each magnetic focusing unit 24 are arranged in a Halebeck array on the moving pole shoe 23. The moving yokes 21, the moving teeth 22, and the moving pole shoe 23 are all made of soft magnetic materials, such as silicon steel sheets, soft magnetic ferrites, amorphous alloys, etc. A coil winding 25 is wound on the moving teeth 22, and the coil winding 25 is made of copper core enameled wire. Each magnet is a permanent magnet material.

[0047] In one embodiment, combined with Figure 1 , Figure 3 and Figure 4 As shown, the mover structure 2 is positioned above the stator structure 1. The mover yoke 21 is located at the top of the mover tooth 22, and the mover pole piece 23 is located at the bottom of the mover tooth 22. The magnetic focusing unit 24 is attached to the surface of the mover pole piece 23. Multiple magnets are symmetrically arranged along the vertical centerline of the mover pole piece 23. Here, the vertical direction can refer to the up-down direction. Multiple magnets are symmetrically arranged on each mover pole piece 23 along the left-right direction, thereby increasing the concentration of the magnetic field and enhancing the magnetic force.

[0048] The mover pole shoe 23 has a first surface facing the stator structure 1 and second surfaces located at both ends of the first surface. The plurality of magnets includes a plurality of first magnets 242 disposed on the first surface and second magnets 241 disposed on the two second surfaces. Since the number of magnets is odd, a central magnet 243 is disposed on the first surface, and the plurality of second magnets 241 are located on both sides of the mover pole shoe 23 laterally and are symmetrically distributed around the central magnet 243. The magnetization directions of two symmetrical second magnets 241 are either opposite or the same. The plurality of first magnets 242 are disposed on the first surface and are symmetrically distributed around the central magnet 243. The magnetization directions of two symmetrical first magnets 242 are opposite.

[0049] Preferably, the magnetization directions of any two adjacent magnets are the same or at a 90° angle. That is, the magnetization directions of any two adjacent magnets are consistent, or the magnets rotate 90° clockwise or counterclockwise, and all magnets are arranged adjacent to each other. This makes the magnetic strength of each magnet stronger, thereby increasing the working power of the magnetic trackless linear motor 100.

[0050] In one embodiment, such as Figure 3As shown, there are five magnets, including two second magnets 241 and three first magnets 242 located between the two second magnets 241.

[0051] The two second magnets 241 are magnetized in the same direction and both are transverse. The magnetization direction of the two second magnets 241 is the same as or opposite to the movement direction of the moving structure 2. The magnetization direction of the middle first magnet 242 (i.e., the central magnet 243) is opposite to the magnetization direction of the second magnets 241, that is, the direction of the central magnet 243 is to the left or right. The magnetization directions of the other two first magnets 242 are opposite and both are vertical. Among the two first magnets 242, when the magnetization direction of one first magnet 242 is upward, the magnetization direction of the other first magnet 242 is downward. In summary, the magnetization directions of the two second magnets 241, the two first magnets 242, and the central magnet 243 that are arranged adjacently are set at a 90° angle to better improve the magnetic strength of each magnet.

[0052] The dimensions of each magnet can be reasonably set according to the dimensions of the moving pole shoe 23. The length and thickness of each magnet can be set differently, so that the multiple second magnets 241 and the multiple first magnets 242 can completely cover the second and first surfaces of the moving pole shoe 23, thereby achieving a better magnetization effect.

[0053] In another specific embodiment, such as Figure 4 As shown, there are seven magnets, including two second magnets 241 and five first magnets 242 located between the two second magnets 241.

[0054] The two second magnets 241 are magnetized in opposite directions, both laterally. When one of the second magnets 241 is magnetized to the right, the other is magnetized to the left. The first magnet 242 (i.e., the central magnet 243) in the middle is magnetized vertically, meaning it can be magnetized upwards or downwards.

[0055] The magnetization directions of the remaining four first magnets 242 are symmetrically arranged with respect to the central first magnet 242. The four first magnets 242 include a first group of magnets and a second group of magnets. The first group of magnets includes two first proximal magnets 2421 symmetrically arranged on both sides of the central magnet 243, and the second group of magnets includes two first distal magnets 2422 symmetrically arranged on both sides of the central magnet 243. The two first distal magnets 2422 are located outside the two first proximal magnets 2421 and at least partially overlap with the two second magnets 241. When one of the two first proximal magnets 2421 is magnetized to the right, the other is magnetized to the left, maintaining opposite magnetization directions. The two first distal magnets 2422 are magnetized in the same direction, either both facing upwards or both facing downwards. In summary, the magnetization directions of two adjacent magnets among the two second magnets 241, the two first proximal magnets 2421, the two first distal magnets 2422, and the central magnet 243 are set at a 90° angle to better improve the magnet strength of each magnet.

[0056] Similarly, the size of each magnet can be reasonably set according to the size of the moving pole shoe 23, so that the multiple second magnets 241 and the multiple first magnets 242 can completely cover the second surface and the first surface of the moving pole shoe 23, thereby achieving a better magnetization effect.

[0057] In another embodiment, combined with Figure 2 As shown, the stator structure 1 can be provided in two sets, with the stator modulation teeth 12 of the two sets of stator structures 1 arranged at a relative interval along the longitudinal direction. The mover structure 2 is also provided in two sets, located between the two sets of stator structures 1, with the mover yokes 21 of the two sets of mover structures 2 fitting together. The two magnetic focusing units 24 of the two sets of mover structures 2 are respectively positioned towards the stator modulation teeth 12 of the two sets of stator structures 1. Compared to the previous embodiment, both the mover structure 2 and the stator structure 1 are rotated 90° laterally, so that the two sets of stator structures 1 are located on the outer sides of the two sets of mover structures 2 in the longitudinal direction, thereby forming double the power and better improving the load capacity of the magnetically focused, trackless linear motor 100.

[0058] Here, "longitudinal" refers to the direction perpendicular to the "transverse" direction on the horizontal plane. When "transverse" refers to the left-right direction, "longitudinal" can refer to the front-back direction. The length of each stator structure 1 is arranged along the left-right direction, and two sets of stator structures 1 are opposite each other along the front-back direction. Two sets of mover structures 2 are located between the two sets of stator structures 1. The mover yokes 21 of the two sets of mover structures 2 are fitted together, and preferably, the mover yokes 21 of the two sets of mover structures 2 are integrally formed, so that double the thrust can be generated while better eliminating the magnetic attraction force on the mover structure 2.

[0059] The magnetically focused, trackless linear motor 100 provided by this utility model eliminates the need for permanent magnets on the stator structure 1, resulting in lower costs and simpler manufacturing. Furthermore, a magnetically focused unit 24 is provided on the side of the mover structure 2 facing the stator structure 1, and the magnetization directions of two adjacent magnets in each magnetically focused unit 24 are at 90°, resulting in a stronger magnetic field and a stronger driving force. Moreover, the special shape of the stator modulation teeth 12 can better eliminate the cogging effect, making the motor run more smoothly and with higher precision.

[0060] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A poly-magnetic non-magnetic rail linear motor characterized by, include: The stator structure includes a stator yoke extending laterally, and a plurality of stator modulation teeth disposed on the stator yoke, wherein the plurality of stator modulation teeth are arranged at intervals laterally. The moving part structure is movably arranged in the transverse direction relative to the stator structure. The moving part structure includes a plurality of moving parts arranged sequentially adjacent to each other in the transverse direction, and a plurality of magnetic focusing units corresponding to each of the moving parts near the end of the stator structure. Each magnetic focusing unit is at least partially oriented toward each of the stator modulation teeth. Each magnetic focusing unit includes a plurality of magnets, wherein the number of magnets in each magnetic focusing unit is an odd number greater than or equal to 5.

2. The magnetic levitation non-magnetic rail linear motor according to claim 1, wherein Each of the aforementioned moving parts includes a moving yoke and a moving tooth, and each of the aforementioned magnetic focusing units is attached to the surface of the corresponding moving tooth; or, Each of the moving parts includes a moving yoke, a moving tooth, and a moving pole shoe, and each of the magnetic focusing units is attached to the surface of the corresponding moving pole shoe.

3. The magnetic levitation non-magnetic rail linear motor according to claim 1, wherein The multiple magnets are arranged symmetrically along the center line of the vertical direction of the moving element.

4. The magnetically focused, trackless linear motor as described in claim 1, characterized in that, The magnetization directions of any two adjacent magnets are the same or at a 90° angle.

5. The magnetic levitation non-magnetic rail linear motor according to claim 2, wherein The mover pole shoe has a first surface facing the stator structure and a second surface located at both ends of the first surface. The plurality of magnets include a plurality of first magnets disposed on the first surface and a plurality of second magnets disposed on the two second surfaces.

6. The magnetic levitation non-magnetic rail linear motor according to claim 5, wherein The magnet is provided in five parts, including two second magnets and three first magnets located between the two second magnets. The magnetization direction of the two second magnets is the same and is both horizontal. The magnetization direction of the middle first magnet is opposite to that of the second magnet. The magnetization directions of the other two first magnets are opposite and are both vertical.

7. The magnetic levitation non-magnetic rail linear motor according to claim 5, wherein The magnet has seven components, including two second magnets and five first magnets located between the two second magnets. The magnetization directions of the two second magnets are opposite and both are horizontal. The magnetization direction of the first magnet in the middle is vertical, and the magnetization directions of the other four first magnets are symmetrically arranged with respect to the first magnet in the middle.

8. The magnetic levitation non-magnetic rail linear motor according to claim 2, wherein The stator structure is provided in two sets, and the stator modulation teeth of the two sets of stator structures are arranged at relative intervals along the longitudinal direction; The moving part structure is provided in two sets, which are located between the two sets of stator structures, and the moving part yokes of the two sets of moving parts are fitted together. The two magnetic focusing units of the two sets of moving parts are respectively arranged towards the stator modulation teeth of the two sets of stator structures.

9. The magnetic levitation non-magnetic rail linear motor according to claim 1, wherein The cross-section of each of the stator modulation teeth is rectangular or trapezoidal; and / or, The cross-section of each stator modulation tooth is rectangular or trapezoidal, and the top of each stator modulation tooth is provided with a first chamfer, which is single-step, multi-step, or arc-shaped; and / or, Each of the magnets has a second chamfer at one end facing the stator structure. The second chamfer is in the form of a single step, multiple steps, a slope, an arc, or a combination of any two or more of these shapes.

10. The magnetically focused, trackless linear motor as described in claim 2, characterized in that, The yokes of the multiple moving units are integrally arranged.

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