Linear electric motor and its application

Abstract

The application discloses a linear motor and application thereof, wherein the linear motor comprises a stator assembly and a plurality of mover assemblies; the stator assembly comprises at least two magnetic yoke plates arranged in parallel with each other, at least one support part and a plurality of groups of magnetic steel; a containing space is formed between the two adjacent magnetic yoke plates; the at least one support part is supported and connected with the two adjacent magnetic yoke plates and arranged in the containing space, so as to divide the containing space into at least two moving spaces; two groups of magnetic steel matched with each other are arranged in each moving space; the two groups of magnetic steel are respectively arranged on the first inner wall and the second inner wall of the two magnetic yoke plates arranged oppositely in the moving space; and the moving space has an opening. At least two mover assemblies are arranged in the same moving space, and part of the mover assemblies in each moving space extends outward from the opening to connect a load; different mover assemblies are driven to move linearly along the moving space in response to different load modes of the linear motor. The linear motor has various thrust modes and the mover structure is small and compact.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to linear motors and applications thereof. Background Art

[0002] A linear motor is a mechanism that can directly convert electrical energy into linear motion mechanical energy, and can directly drive the load connected to it to perform linear motion.

[0003] With the development of modern industry, mechanical production equipment is becoming increasingly automated, especially in the highly integrated and automated semiconductor field. During chip manufacturing and packaging, the chip is typically soldered to a substrate, and then packaged through other steps. When soldering the chip, the distribution and uniformity of the solder, as well as the thickness of the tin film, must be guaranteed, and voids in the film must be avoided. Therefore, tinning equipment must have high operating precision and low vibration. Therefore, a motor that can stably animate the tin tip is necessary.

[0004] The thrust of the motors used in existing tinning equipment cannot meet the required requirements, nor can it meet the requirements of matching multiple motion conditions at the same time. Motors usually use larger movers to achieve greater thrust, which makes the motor bulky and prone to bubbles during the glue pouring process when manufacturing the mover. Poor glue pouring uniformity causes the mover surface to have poor flatness and rigidity, which is easily deformed by force. When a larger mover is used, the mover's movement range is also extremely limited, and high-frequency vibration is prone to occur during the mover's movement. The use of a larger mover also requires the arrangement of larger magnets, and the magnetic field strength generated by the magnets is stronger. When the yoke plate on the stator is not thick enough, it is easy to deform under strong magnetic force, making the motor unable to operate normally. Ultimately, this will lead to unstable tinning process, uneven quality of packaged chips, and many defects. Summary of the Invention

[0005] In view of this, the present invention proposes a linear motor and its application, which aims to achieve multi-operation mode operation and provide a variety of thrusts, and each moving sub-assembly of the motor has a compact structure, is easy to assemble, operates stably, and is safe and reliable.

[0006] The linear motor proposed in the first aspect of the present invention includes: a stator assembly, the stator assembly includes at least two yoke plates arranged parallel to each other, at least one support portion and multiple groups of magnets, and a receiving space is formed between two adjacent yoke plates; at least one support portion is supported and connected to two adjacent yoke plates and is arranged in the receiving space to divide the receiving space into at least two moving spaces; two matching groups of magnets are arranged in each of the moving spaces, and the two groups of magnets correspond to the first inner wall and the second inner wall of the two yoke plates arranged opposite to each other in the moving space, and the moving space has an opening; multiple mover assemblies, at least two mover assemblies are provided in the same moving space, and part of the mover assembly of each moving space extends outward from the opening to connect the load, and in response to different load modes of the linear motor, different mover assemblies are driven to move linearly along the moving space.

[0007] From the above technical solution, it can be seen that the linear motor proposed in the first aspect of the present invention can be divided into multiple non-interfering moving spaces in the same accommodating space, and multiple movable sub-assemblies can be set in each moving space to perform linear movement. Each movable sub-assembly can be independently controlled. Therefore, each movable sub-assembly can be matched and combined according to the different load modes of the linear motor, so as to realize different thrust modes after the different movable sub-assemblies are assembled. It can be an assembly of different movable sub-assemblies in multiple moving spaces, or an assembly of different movable sub-assemblies in a single-sided moving space to provide thrusts of different sizes. The structure of each movable sub-assembly is compact and easy to process. When assembled and operated, the thrust to the load is stable, and the thrust can be adjusted according to different needs. When the movable sub-assemblies in different moving spaces are assembled, the multilateral operation mode of the motor can be realized, thereby realizing the separate movement of multiple loads, or realizing the multi-point support movement and stable movement of the same load.

[0008] In some embodiments of the invention, the mover assembly includes a movable plate and a coil, the coil is arranged on the movable plate, and when the coil is energized, the mover assembly performs linear motion in the moving space.

[0009] Optionally, the movable plate is a carbon fiber plate or an aluminum plate; and / or, the coil includes a plurality of sub-coils, and the plurality of sub-coils are fixed on the movable plate at intervals, and at least some of the sub-coils can be independently energized; and / or, the coil and the movable plate are sealed as one.

[0010] In some embodiments of the invention, the support portion is connected to the yoke plate by bolts or fixed connection; and / or, the support portion includes a main portion and at least one auxiliary portion, the two ends of the main portion are respectively vertically connected to the two yoke plates, and the two side surfaces of the auxiliary portion are respectively connected to the main portion and the yoke plates.

[0011] In some embodiments of the invention, one of the support parts is arranged in the middle of the accommodating space and divides the accommodating space into two movable spaces, and the linear motor has a unilateral operation mode and a bilateral operation mode; or, the support part includes a first support part and a second support part, and the first support part and the second support part are arranged perpendicular to each other in the accommodating space, one end of the first support part is vertically connected to the second support part, and the other end of the first support part extends to the first edge of the accommodating space, and the two ends of the second support part extend to the second edge and the fourth edge of the accommodating space respectively; the first support part and the second support part divide the accommodating space into three movable spaces. The linear motor has a single-side operation mode, a double-side operation mode or a three-side operation mode; or the support part includes a first support part, a second support part and a third support part, the two ends of the first support part are respectively vertically connected to the second support part and the third support part, the two ends of the second support part extend to the second edge and the fourth edge of the accommodating space, the two ends of the third support part extend to the second edge and the fourth edge of the accommodating space, the first support part, the second support part and the third support part divide the accommodating space into four moving spaces, and the linear motor has a single-side operation mode, a double-side operation mode, a three-side operation mode or a four-side operation mode.

[0012] In some embodiments of the invention, the linear motor further includes an edge support portion, which is arranged in the moving space and is respectively connected to two adjacent yoke plates, and the edge support portion is arranged at the edge of the moving space and at the beginning and / or end of the moving direction of the mover assembly.

[0013] Advantageously, a plurality of gas flow channels are provided on the side support portion to achieve heat dissipation; and / or, at least one gas flow channel is provided on the support portion to achieve heat dissipation.

[0014] In some embodiments of the invention, the linear motor further comprises a yoke guard plate, two yoke guard plates are provided at each of the openings, the two yoke guard plates cover part of the opening, the ends of the two yoke guard plates away from each other are respectively connected to the two yoke plates of the same opening, and the two yoke guard plates are spaced apart at one end facing each other; part of the mover assembly extends outward from the gap between the two yoke guard plates to connect to the load.

[0015] Optionally, the two groups of magnetic steels located in the same moving space are arranged in a Halbach array along the moving direction of the mover assembly.

[0016] A second aspect of the present invention provides an application of the linear motors of the aforementioned embodiments to linear motion of loads in the field of drawing.

[0017] The application of the linear motor proposed in the second aspect of the present invention can be used for loads that need to perform linear motion in the tinning process, and the linear motor drives the load to perform linear motion.

[0018] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the disclosure of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained from these drawings without any creative work.

[0020] Figure 1 is a structural schematic diagram of a linear motor proposed in some embodiments of the present invention;

[0021] Figure 2 is another structural schematic diagram of a linear motor proposed in some embodiments of the present invention;

[0022] Figure 3 is another structural schematic diagram of a linear motor proposed in some embodiments of the present invention;

[0023] Figure 4 yes Figure 1 A top view of the linear motor in FIG, omitting the mover assembly;

[0024] Figure 5 yes Figure 4 Sectional view along line AA;

[0025] Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of a linear motor omitting the mover assembly;

[0026] Figure 7 is a schematic structural diagram of a mover assembly proposed in some embodiments of the present invention;

[0027] Figure 8 yes Figure 5 Schematic diagram of the enlarged structure of the middle area B;

[0028] Figure 9 This is a schematic diagram of the cooperation between a support portion and a yoke plate, and the division of the accommodation space between the two yoke plates into two movable spaces, as proposed in some embodiments of the present invention. One yoke plate and other components are omitted in the figure.

[0029] Figure 10This is a schematic diagram of the cooperation between two supporting parts and a yoke plate proposed in some embodiments of the present invention, and dividing the accommodation space between the two yoke plates into three movable spaces. One yoke plate and other components are omitted in the figure;

[0030] Figure 11 This is a schematic diagram of the cooperation between three supporting parts and a yoke plate proposed in some embodiments of the present invention, and dividing the accommodation space between the two yoke plates into four movable spaces. One yoke plate and other components are omitted in the figure;

[0031] Figure 12 Schematic diagram of the arrangement of a group of magnetic steels proposed in some embodiments of the present invention.

[0032] Description of reference numerals:

[0033] 100. Linear motor;

[0034] 10. Stator assembly;

[0035] 11. Yoke plate;

[0036] 12. Support portion; 12a. Main portion; 12b. Auxiliary portion;

[0037] 121, first support portion; 122, second support portion; 123, third support portion;

[0038] 13. Magnetic steel;

[0039] 131, first magnetic steel; 132, second magnetic steel; 133, third magnetic steel; 134, fourth magnetic steel;

[0040] 14. Accommodation space;

[0041] 141, first edge; 142, second edge; 143, third edge; 144, fourth edge;

[0042] 15. Moving space; 151. Opening;

[0043] 20. Moving subassembly; 21. Movable plate; 211. Assembly hole; 22. Coil; 221. Sub-coil;

[0044] 30. Side support portion;

[0045] 40. Yoke guard plate. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0047] In the absence of conflict, the following embodiments and features thereof may be combined with each other.

[0048] The motors used in existing tin painting equipment have low thrust, single mode, large mover volume, unstable operation and short travel range. The specific performance is:

[0049] In order to achieve a higher output thrust, the prior art uses a larger coil mover. During the preparation of the mover, the coil mover that is encapsulated with epoxy resin is prone to insufficient overall rigidity and poor flatness, and is easily deformed by force during acceleration. The larger the coil mover, the more likely it is that bubbles will appear in the epoxy resin encapsulation or the encapsulation will be insufficient, resulting in a lack of glue on the mover surface, poor heat dissipation during operation, and high-frequency vibration. The entire motor is large and inconvenient to arrange in precision equipment. The larger the coil mover, the shorter the stroke in a limited space; the stator magnet required to move the coil mover is also larger, causing the yoke plate to be subjected to a greater magnetic attraction force. Without increasing the thickness of the yoke plate, the motor's yoke plate is very easy to deform, affecting the safe operation of the motor, and the output force is unstable, resulting in poor quality of the soldering process; and the above-mentioned coil mover can only be soldered once, resulting in low work efficiency.

[0050] The following embodiments of the present invention can solve at least part or all of the above problems. Figure 1 、 Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a linear motor 100, wherein the output thrust of the motor is adjustable and can drive multiple loads to move. The motor's movable subassembly has a compact structure, high operational stability, and good quality.

[0051] The linear motor 100 proposed in the present invention includes a stator assembly 10 and a plurality of mover assemblies 20 .

[0052] Among them, Figure 5 and Figure 6As shown, the stator assembly 10 includes at least two yoke plates 11 arranged parallel to each other, at least one support portion 12 and a plurality of groups of magnetic steels 13, and an accommodating space 14 is formed between two adjacent yoke plates 11. That is to say, the stator assembly 10 may include two yoke plates 11 arranged parallel to each other, in which case an accommodating space 14 is formed between the two yoke plates 11 arranged parallel to each other. The stator assembly 10 may also include three yoke plates 11 arranged parallel to each other, in which case an accommodating space 14 is formed between each two adjacent yoke plates 11, thus having two layers of accommodating spaces 14. By analogy, the number of accommodating spaces 14 in the present invention is the number of yoke plates 11 minus one, and can be set according to actual needs.

[0053] like Figure 5 As shown, at least one support portion 12 is supported and connected to two adjacent yoke plates 11 and is disposed in the accommodation space 14 to divide the accommodation space 14 into at least two movable spaces 15. In other words, the two yoke plates 11 are supported by the support portion 12, and at the same time, the accommodation space 14 is also spatially divided by the support portion 12.

[0054] Furthermore, if Figure 5 As shown, each movable space 15 is provided with two matching sets of magnetic steel 13. The two sets of magnetic steel 13 are respectively located on the first and second inner walls of the two yoke plates 11 in the movable space 15, which are arranged facing each other. The movable space 15 has an opening 151. It should be noted that the two sets of magnetic steel 13 in the movable space 15 are pre-magnetized, and a certain magnetic field can be formed between each set of magnetic steel 13.

[0055] like Figure 1 、 Figure 2 and Figure 3 As shown, the same moving space 15 is provided with at least two mover assemblies 20, and a portion of the mover assembly 20 in each moving space 15 extends outward from the opening 151 to connect to a load. In response to different load modes of the linear motor 100, different mover assemblies 20 are driven to move linearly along the moving space 15. Here, the mover assembly 20 can move linearly in the moving space 15 relative to the stator assembly 10.

[0056] From the above, it can be seen that from the above technical solution, the linear motor 100 proposed in the present invention can be divided into multiple mobile spaces 15 without interference in the same accommodating space 14, and multiple movable sub-assemblies 20 can be set in each mobile space 15 for linear movement. Each movable sub-assembly 20 can be controlled independently or coordinated together. Therefore, each movable sub-assembly 20 can be matched and combined according to the different load modes of the linear motor 100, so as to realize different thrust modes after different movable sub-assemblies 20 are assembled.

[0057] It can be a combination of different movable sub-assemblies 20 in multiple moving spaces 15, so that the linear motor 100 enters a multilateral operation mode to provide thrusts of different sizes, and provide movement of different loads, or realize multi-point support movement of the same load; it can also be a combination of different movable sub-assemblies 20 in a single-sided moving space 15, so that the linear motor 100 enters a unilateral operation mode to provide thrusts of different sizes, and can provide multi-point support for the same load, and can also provide separate movement of different loads.

[0058] In the present invention, each movable subassembly 20 has a compact structure and is easy to process. There is no need to increase the size of the magnetic steel 13 and a large movement stroke can be maintained. When different movable subassemblies 20 are combined and operated, the thrust on the load is stable and the thrust can be adjusted according to different needs.

[0059] In the description of the present application, “plurality” means two or more, unless otherwise clearly defined.

[0060] It can be understood that compared with the larger movers and motors with unadjustable thrust in the prior art, the mover assembly 20 of the linear motor 100 of the present invention has a compact structure. The linear motor 100 can provide movers 20 with different combinations to move the load, and can provide different thrusts, stable operation, and high efficiency in multiple load operations.

[0061] The linear motor 100 of the present invention can have a single layer of accommodation space 14 formed by two parallel layers of yoke plates 11, or can have two layers of accommodation space 14 formed by three parallel layers of yoke plates 11, or can have more layers of accommodation space 14. These are not limited here and are all within the scope of protection of the present invention. The following embodiments of the present invention illustrate the specific structure of the stator assembly 10 based on a single layer of accommodation space 14 formed by two parallel layers of yoke plates 11. The structure and position of each component in the other layers of accommodation space 14 can refer to the structure and design position of the single layer of accommodation space 14.

[0062] In some embodiments of the invention, Figure 7 As shown, the movable assembly 20 includes a movable plate 21 and coils 22. The coils 22 are arranged on the movable plate 21. When energized, the movable assembly 20 moves linearly within the movable space 15. In other words, the movable plate 21 provides the structural foundation for arranging the coils 22. The coils 22 can be completely distributed across the movable plate 21, and the number of coils 22 on the movable plate 21 is adjustable to maximize the space available on the movable plate 21. When energized, the coils 22 can achieve linear motion in different directions within the magnetic field created by the two sets of magnets 13 within the movable space 15.

[0063] Optionally, the movable plate 21 is a carbon fiber plate or an aluminum plate. The carbon fiber plate or the aluminum plate is very light in weight, and the cost is controllable, the rigidity is good, and it also has a certain vibration absorption and good thermal conductivity, which is convenient for the coil 22 to dissipate heat and withstand high temperature operation. Therefore, after the coil 22 of the present invention is fixed on such a movable plate 21, the overall structure is stable, not easy to deform, the heat dissipation efficiency is good, it is not easy to vibrate, and it is conducive to improving the operational stability. In particular, when the movable plate 21 is made of a carbon fiber plate, a carbon fiber linear motor having a mover assembly 20 of a carbon fiber plate can be made. The carbon fiber linear motor has the advantages of low thrust fluctuation, no cogging force, high strength and stable accelerated operation. Therefore, it can be widely used in high-precision equipment, such as in the process of tinning and pasting semiconductor chips.

[0064] Alternatively, as Figure 7 As shown, the coil 22 includes multiple sub-coils 221, which are fixed at intervals on the movable plate 21. At least some of the sub-coils 221 can be independently energized. In the present invention, by controlling the conductivity of some of the sub-coils 221, the thrust of a single mover assembly 20 can be controlled, and the movement rate of the single mover assembly 20 can also be controlled. The number of sub-coils 221 is adjustable to fully utilize the layout space of the movable plate 21, thereby increasing the thrust of the linear motor 100 and ensuring that the thrust of the mover assembly 20 is minimized while maximizing the thrust.

[0065] Optionally, the coil 22 and the movable plate 21 are sealed together. This sealing process allows the coil 22 and the movable plate 21 to be integrated, thereby increasing the overall strength of the movable subassembly 20 and reducing the deformation probability of the movable subassembly 20, making it more adaptable to high-speed and accelerated operation.

[0066] Alternatively, as Figure 7 As shown, the portion of the movable plate 21 extending outside the movable space 15 is provided with an assembly hole 211, thereby facilitating connection with the load. At the same time, the coil 22 also needs to avoid the assembly hole 211 when being arranged, and the coil 22 is arranged in the movable space 15 as much as possible.

[0067] In some embodiments of the invention, Figure 4 and Figure 5As shown, the support portion 12 and the yoke plate 11 are connected by bolts or fixedly. When bolted, a detachable connection is formed between the support portion 12 and the yoke plate 11. When some components are damaged, the two can be disassembled by removing the bolts, which facilitates repair, reduces maintenance costs, and is less difficult to process. When the two are fixedly connected, the integrity is good, there is no gap between the two, and it is not easy to produce abnormal noise. The support portion 12 of the present invention greatly improves the structural strength of the stator assembly 10, so that the air gap between the magnetic steel 13 of the stator assembly 10 and the movable assembly 20 remains constant, ensuring that the movable assembly 20 can operate stably in the moving space 15. In addition, the support portion 12 of the present invention can meet the overall strength of the stator assembly 10 without increasing the thickness of the yoke plate 11, thereby reducing the thickness of the yoke plate 11 and saving material. In some specific examples, the support portion 12 and the yoke plate 11 are fixedly connected, which can be adhesive or welding. In other examples, the support portion 12 and the yoke plate 11 can also be manufactured as an integral connection.

[0068] Furthermore, if Figure 8 As shown, the support portion 12 includes a main portion 12a and at least one auxiliary portion 12b. The two ends of the main portion 12a are respectively connected vertically to the two yoke plates 11, and the two side surfaces of the auxiliary portion 12b are respectively connected to the main portion 12a and the yoke plates 11. In other words, the main portion 12a is vertically supported between the two yoke plates 11 in the same accommodating space 14, so that the distance between the two yoke plates 11 remains stable, which provides the required structural basis for arranging the magnetic steel 13 on the yoke plate 11. The auxiliary portion 12b can further enhance the connection contact area between the main portion 12a and the yoke plate 11, thereby further increasing the connection strength between the two and improving the structural strength of the support portion 12 itself. The auxiliary portion 12b can be provided at any one end or both ends of the main portion 12a facing the yoke plate 11, and can be provided according to actual needs.

[0069] Alternatively, as Figure 8 As shown, the main body 12a and the two auxiliary parts 12b are integrally formed, and the cross-section of the two auxiliary parts 12b and the main body 12a along the surface perpendicular to the yoke plate 11 is an "I" shape. The integrally formed main body 12a and auxiliary parts 12b do not require subsequent installation, and the structure is simple. The contact area between the support part 12 and the two yoke plates 11 is large, the connection stability of the support part 12 and the yoke plate 11 is good, and the overall structural strength of the support part 12 is high.

[0070] In some specific examples, there may be multiple auxiliary parts 12b located at the same end of the main body 12a, and the multiple auxiliary parts 12b are evenly spaced and arranged with the main body 12a as the center; in other specific examples, the auxiliary parts 12b located at the same end of the main body 12a are a full circle surrounding the main body 12a, so that the end of the main body 12a can maintain a larger contact area with the yoke plate 11 in the circumferential direction, and the connection stability is good.

[0071] Advantageously, the support portion 12 of the present invention is a yoke support portion, thereby isolating the electromagnetic fields in each moving space 15 so that the mover assemblies 20 in each moving space 15 do not interfere with each other during operation.

[0072] In some embodiments of the invention, Figure 1 and Figure 9 As shown, a support portion 12 is provided in the middle of the accommodating space 14, and divides the accommodating space 14 into two moving spaces 15, and the linear motor 100 has a unilateral operation mode and a bilateral operation mode. The openings 151 of the two moving spaces 15 in these examples are respectively located at the second edge 142 and the fourth edge 144 of the accommodating space 14. In the present invention, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of the said features.

[0073] In a specific example, when the maximum load-bearing thrust of the movable sub-assembly 20 is 150N and two movable sub-assemblies 20 are arranged in each moving space 15, the linear motor 100 can be in a unilateral operation mode. It can be used to move one movable sub-assembly 20 or two movable sub-assemblies 20 in any one of the moving spaces 15. At this time, the linear motor 100 can provide a thrust of 150N or a thrust of 300N in the unilateral operation mode. When the two movable sub-assemblies 20 are assembled and run separately, carrying two loads respectively, they can also drive the two loads to move separately. When there is a mover assembly 20 in each of the two moving spaces 15, the linear motor 100 is in a bilateral operation mode. At this time, each mover assembly 20 in the two moving spaces 15 can operate independently, and can provide thrusts of 150N and 300N on both sides respectively; different mover assemblies 20 in the two moving spaces 15 can also be combined and operated, and the thrust can be 300N (one mover assembly 20 on each side is operating), 450N (two mover assemblies 20 in one moving space 15 are operating, and one mover assembly 20 in the other moving space 15 is operating), or 600N (two mover assemblies 20 in the moving spaces 15 on both sides are operating); at the same time, the mover assemblies 20 on both sides can also move the load, and up to four load movement operations can be completed in one movement, which greatly enriches the operation mode and load movement efficiency of the linear motor 100, and also makes the output force of the linear motor 100 adjustable. It should be noted that the maximum thrust provided by each movable assembly 20 in these examples can also be other values, and this is not limited here. Similarly, the two movable assemblies 20 in each movable space 15 in these examples can also be three, four, or other numbers, and this is not limited here. In addition, when the movable assemblies 20 in the movable space 15 operate independently, the movable assemblies 20 can drive the load at high speed, with a short response time, fast operation speed, and can drive the load to move quickly and with high acceleration.

[0074] In some embodiments of the invention, Figure 2 and Figure 10As shown, the support portion 12 includes a first support portion 121 and a second support portion 122. The first support portion 121 and the second support portion 122 are arranged perpendicular to each other in the accommodating space 14. One end of the first support portion 121 is perpendicularly connected to the second support portion 122, and the other end of the first support portion 121 extends to the first edge 141 of the accommodating space 14. The two ends of the second support portion 122 extend to the second edge 142 and the fourth edge 144 of the accommodating space 14, respectively. Thus, the first support portion 121 and the second support portion 122 divide the accommodating space 14 into three movable spaces 15, and the linear motor 100 can operate in a single-side mode, a double-side mode, or a three-side mode. In these examples, the first support portion 121 and the second support portion 122 form a "T" shape, and the accommodating space 14 is also divided into three movable spaces 15. The openings 151 of the three movable spaces 15 are located at the second edge 142, the third edge 143, and the fourth edge 144 of the accommodating space 14, respectively.

[0075] The following describes the three operating modes of the linear motor 100, taking the example of a mover assembly 20 with a maximum load-bearing thrust of 150 N and two mover assemblies 20 arranged in each moving space 15. In the unilateral operating mode, the linear motor 100 can move one mover assembly 20 or a combination of two mover assemblies 20 in any one of the moving spaces 15. In this case, the linear motor 100 can provide a thrust of 150 N or 300 N in the unilateral operating mode. When two mover assemblies 20 in the moving spaces 15 on the same side are arranged and operated separately, each carrying two loads, the linear motor 100 can also drive the two loads to move independently.

[0076] When two of the three moving spaces 15 each have a movable sub-assembly 20 running, the linear motor 100 is in a bilateral operation mode. At this time, each movable sub-assembly 20 in the two moving spaces 15 can run independently, and can provide thrusts of 150N and 300N on both sides respectively; different movable sub-assemblies 20 in the two moving spaces 15 can also be combined and run, and the thrust can be 300N (one movable sub-assembly 20 in each of the two moving spaces 15 is running), 450N (two movable sub-assemblies 20 in one moving space 15 are running, and one movable sub-assembly 20 in the other moving space 15 is running), or 600N (two movable sub-assemblies 20 in each of the two moving spaces 15 are running); at the same time, the movable sub-assemblies 20 on both sides can also move the load, and a maximum of four load movement operations can be completed in one movement, which greatly enriches the operation mode and load movement efficiency of the linear motor 100, and also makes the output force of the linear motor 100 adjustable.

[0077] When the three moving spaces 15 have the moving subassemblies 20 running, the linear motor 100 is in the three-side operation mode, and the moving subassemblies 20 in the three moving spaces 15 can run independently. At this time, the moving subassembly 20 in each moving space 15 can provide a thrust of 150N or 300N; when different moving subassemblies 20 in the three moving spaces 15 are combined and run, a thrust of 450N can be provided (one moving subassembly 20 in each of the three moving spaces 15 is running), a thrust of 600N can be provided (two moving subassemblies in one of the three moving spaces 15 are running), and a thrust of 150N can be provided. The linear motor 100 can provide a thrust of 750N (two of the three moving spaces 15 have two moving sub-assemblies 20 in operation, while the other two moving spaces 15 each have one moving sub-assembly 20 in operation), and a thrust of 900N (two of the three moving spaces 15 have two moving sub-assemblies 20 in operation). At the same time, in the three-side operation mode, the moving sub-assemblies 20 in the three moving spaces 15 of the linear motor 100 can drive the load to move in three directions. In addition, when the moving sub-assemblies 20 in the moving spaces 15 operate independently, the moving sub-assemblies 20 can drive the load to move at high speed, with short response time and fast operation speed, and can drive the load to move quickly and with high acceleration.

[0078] It should be noted that the maximum thrust that each movable subassembly 20 can provide in these examples can also be other values, which are not limited here; similarly, the two movable subassemblies 20 in each moving space 15 in these examples can also be three, four or other numbers, which are not limited here.

[0079] In some embodiments of the invention, Figure 3 and Figure 11 As shown, the support portion 12 includes a first support portion 121, a second support portion 122, and a third support portion 123. The first support portion 121 has two ends perpendicularly connected to the second support portion 122 and the third support portion 123. The second support portion 122 extends to the second edge 142 and the fourth edge 144 of the accommodating space 14, respectively. The third support portion 123 extends to the second edge 142 and the fourth edge 144 of the accommodating space 14, respectively. The first support portion 121, the second support portion 122, and the third support portion 123 divide the accommodating space 14 into four movable spaces 15. The linear motor 100 can operate in a single-side mode, a double-side mode, a three-side mode, or a four-side mode. In these examples, the first support portion 121, the second support portion 122, and the third support portion 123 are arranged in an "H" shape, thereby dividing the accommodating space 14 into four movable spaces 15. The openings 151 of the four moving spaces 15 are respectively located at the first edge 141 , the second edge 142 , the third edge 143 and the fourth edge 144 of the accommodating space 14 .

[0080] The following describes the four operating modes of the linear motor 100, taking the example of a mover assembly 20 with a maximum load-bearing thrust of 150 N and two mover assemblies 20 arranged in each moving space 15. In the unilateral operating mode, the linear motor 100 can move one mover assembly 20 or a combination of two mover assemblies 20 in any of the four moving spaces 15. In this case, the linear motor 100 can provide a thrust of 150 N or 300 N in the unilateral operating mode. Furthermore, when two mover assemblies 20 in the moving spaces 15 on the same side are arranged and operated separately, each carrying two loads, the linear motor 100 can also drive the two loads to move independently.

[0081] When two of the four moving spaces 15 each have a movable sub-assembly 20 in operation, the linear motor 100 is in a bilateral operation mode. At this time, each movable sub-assembly 20 in two of the moving spaces 15 can operate independently, and can provide thrusts of 150N and 300N on both sides respectively; it can also be that different movable sub-assemblies 20 in any two of the moving spaces 15 are combined for operation, and at this time the thrust can be 300N (one movable sub-assembly 20 in each of the two moving spaces 15 is operating), 450N (two movable sub-assemblies 20 in one of the two moving spaces 15 are operating, and one movable sub-assembly 20 in the other selected moving space 15 is operating), or 600N (two movable sub-assemblies 20 in each of the two selected moving spaces 15 are operating); at the same time, the movable sub-assemblies 20 on both sides of the selected moving space 15 can also move the load, and a maximum of four load movement operations can be completed in one movement, which greatly enriches the operation mode and load movement efficiency of the linear motor 100, and also makes the output force of the linear motor 100 adjustable.

[0082] When three of the four moving spaces 15 have the moving subassemblies 20 running, the linear motor 100 is in the three-side operation mode, and each moving subassembly 20 in the three moving spaces 15 can run independently. At this time, the moving subassembly 20 in each moving space 15 can provide a thrust of 150N or 300N; when different moving subassemblies 20 in three of the four moving spaces 15 are combined and run, a thrust of 450N can be provided (one moving subassembly 20 is running in each of the three selected moving spaces 15), a thrust of 600N can be provided (one of the three selected moving spaces 15 is running), and a thrust of 150N can be provided (one of the three selected moving spaces 15 is running). Two mover assemblies 20 in one of the selected moving spaces 15 are running, and one mover assembly 20 is running in each of the other two moving spaces 15), can provide a thrust of 750N (two of the three selected moving spaces 15 have two mover assemblies 20 running, and the other moving space 15 has one mover assembly 20 running), and can also provide a thrust of 900N (two mover assemblies 20 are running in each of the three selected moving spaces 15). At the same time, in the three-side operation mode, the mover assemblies 20 in the three selected moving spaces 15 of the linear motor 100 can drive the load to move in three directions.

[0083] When the four moving spaces 15 have the movable subassemblies 20 running, the linear motor 100 is in the four-side operation mode, and the movable subassemblies 20 in the four moving spaces 15 can run independently. At this time, the movable subassembly 20 in each moving space 15 can provide a thrust of 150N or 300N; when different movable subassemblies 20 in the four moving spaces 15 are combined and run, a thrust of 600N can be provided (one movable subassembly 20 in each of the four moving spaces 15 is running), a thrust of 750N can be provided (two movable subassemblies 20 in one of the four moving spaces 15 are running), and a thrust of 150N can be provided. In the four-side operation mode, the linear motor 100 has two movable sub-assemblies 20 in operation, while the other three movable spaces 15 each have one movable sub-assembly 20 in operation), can provide a thrust of 900N (two of the four movable spaces 15 have two movable sub-assemblies 20 in operation, and the other two movable spaces 15 have one movable sub-assembly 20 in operation), can also provide a thrust of 1050N (three of the four movable spaces 15 have two movable sub-assemblies 20 in operation, and the fourth movable space 15 has one movable sub-assembly 20 in operation), and can provide a thrust of 1200N (each of the four movable spaces 15 has two movable sub-assemblies 20 in operation). At the same time, in the four-side operation mode, the movable sub-assemblies 20 in the four movable spaces 15 of the linear motor 100 can drive the load to move in four directions, greatly improving the operating efficiency and enriching the adjustment of the thrust size change.

[0084] In addition, when the mover assembly 20 in the moving space 15 operates independently, the mover assembly 20 can drive the load to move at high speed, with a short response time and a fast operating speed, and can drive the load to move quickly and with high acceleration.

[0085] It should be noted that the maximum thrust that each movable subassembly 20 can provide in these examples can also be other values, which are not limited here; similarly, the two movable subassemblies 20 in each moving space 15 in these examples can also be three, four or other numbers, which are not limited here.

[0086] In some embodiments of the invention, Figure 1 and Figure 6 As shown, the linear motor 100 also includes a side support portion 30. The side support portion 30 is provided in the moving space 15 and is respectively connected to two adjacent yoke plates 11. The side support portion 30 is provided at the edge of the moving space 15 and is provided at the beginning and / or end of the moving direction of the mover assembly 20. In other words, the side support portion 30 can achieve effective support of the edges of the two yoke plates 11, so that the gap between the two yoke plates 11 is maintained more stable, and the distance between the two yoke plates 11 is kept consistent, so that the mover assembly 20 in the moving space 15 can move stably. The side support portion 30 of the present invention cooperates with the support portion 12 to further increase the structural strength of the stator assembly 10, so that the air gap between the mover assembly 20 and the magnet 13 remains stable and unchanged, and the mover assembly 20 operates stably.

[0087] Advantageously, the side support portion 30 of the present application is a yoke side support portion, thereby isolating magnetic leakage and reducing interference of the electromagnetic field in each moving space 15 .

[0088] Advantageously, for the linear motor 100 having two operating modes, the side support portion 30 and the two yoke plates 11 on the first edge 141 and the third edge 143 of the accommodating space 14 can be integrally formed and manufactured, which facilitates machining and improves the assembly accuracy of parts. There is no need for assembly, and there will be no assembly errors caused by assembling the side support portion 30.

[0089] Advantageously, the side support 30 is provided with a plurality of air channels for heat dissipation. The air channels can connect the moving space 15 with the external environment, thereby facilitating convection of hot and cold air, facilitating heat dissipation during operation of the mover assembly 20, and ensuring long-term stable operation of the linear motor 100.

[0090] Advantageously, at least one air flow channel is provided on the support portion 12 to achieve heat dissipation. For example, a certain air flow channel can be provided in the portion of the support portion 12 near the edge of the accommodation space 14 to enhance air convection.

[0091] In some embodiments of the invention, Figure 6As shown, the linear motor 100 also includes yoke shields 40. Two yoke shields 40 are provided at each opening 151. The two yoke shields 40 partially shield the opening 151. The ends of the two yoke shields 40 facing away from each other are connected to the two yoke plates 11 of the same opening 151. The two yoke shields 40 are spaced apart at their ends facing each other. Portions of the mover assembly 20 extend outward from the gap between the two yoke shields 40 to connect to the load. Providing the yoke shields 40 at the openings 151 effectively prevents magnetic foreign matter from being attracted by the magnets 13 in the moving space 15, thereby preventing malfunctions of the linear motor 100 during operation.

[0092] Optionally, the gap between the two yoke guards 40 is preferably not less than the thickness of the mover assembly 20 so that the mover assembly 20 does not touch the yoke guards 40 during operation and the mover assembly 20 can pass through the gap and move smoothly in the opening 151.

[0093] Optionally, the two groups of magnets 13 located in the same moving space 15 are arranged in a Halbach array along the moving direction of the mover assembly 20. The mover assembly 20 does not need to be provided with any iron core or ferromagnetic material to enhance the magnetic field, which greatly reduces the weight of the mover assembly 20, making the mover assembly 20 lighter and more conducive to high-speed and accelerated motion. In the Halbach array arrangement, the magnetization of each adjacent four magnets 13 in each group presents a cycle, such as Figure 12 As shown, the first magnetic steel 131, the second magnetic steel 132, the third magnetic steel 133, and the fourth magnetic steel 134 are respectively arranged repeatedly multiple times along the moving direction of the movable subassembly 20. The first magnetic steel 131 and the third magnetic steel 133 are magnetized radially and in opposite directions; the second magnetic steel 132 and the fourth magnetic steel 134 are magnetized axially and in opposite directions. This allows the strongest magnetic field to be generated using a minimum number of magnetic steels 13, ensuring that the movable subassembly 20 has sufficient magnetic force for electromagnetic induction motion during operation, thereby ensuring stable operation of the linear motor 100. Optionally, the widths of two adjacent magnetic steels 13 can be set to different values. For example, the widths of the first magnetic steel 131 and the third magnetic steel 133 can be larger, while the widths of the second magnetic steel 132 and the fourth magnetic steel 134 can be smaller. This allows a greater number of magnetic steels 13 to be arranged in the same space.

[0094] An application of the linear motor 100 of the present invention is described below.

[0095] The linear motor 100 proposed by the present invention is used for linear motion of loads in the field of drawing.

[0096] The linear motor 100 proposed in the present invention can be used in the field of tin painting to move loads that require linear motion. The linear motor 100 can drive multiple loads on the same line to reciprocate along the line, thereby reducing the number of linear motors 100 required to drive multiple loads for linear motion on the same line. It can also drive different loads on multiple lines for linear motion, thereby reducing the number of linear motors 100 required to drive multiple loads on multiple lines in different directions. This reduces the number of linear motors 100 required to be deployed, thus saving costs.

[0097] Optionally, the linear motor 100 is used in a tinning device to drive a tinning load (e.g., a tinning head) to perform linear motion. The linear motor 100 of the present invention can select a mover assembly 20 in each movable space 15 from the linear motor 100 for power supply based on the thrust required by the tinning load and / or the direction of movement of the tinning load. The selected mover assemblies 20 are then connected to multiple tinning loads and drive the multiple tinning loads to perform linear motion, thereby enabling the operation of multiple tinning heads. This allows the tinning device to operate in a variety of modes and achieve high efficiency during tinning.

[0098] Therefore, when the linear motor 100 of the present invention is applied to the field of tin painting, it has the following advantages:

[0099] First, the linear motor 100 can provide large thrust and an adjustable thrust range, and can realize a variety of different operating conditions, which greatly improves the working efficiency of the tin painting equipment.

[0100] Secondly, the mover assembly 20 has a compact structure and a compact layout. The mover assembly 20 maximizes and maximizes the number of coils 22, which not only increases thrust but also increases the number of turns of the coils 22, resulting in rapid heat dissipation and slow temperature rise. The mover assembly 20 is lightweight, and a single mover assembly 20 can achieve rapid response and high-speed motion during operation. The side support portion 30, equipped with a gas flow channel, also allows for rapid heat dissipation from the mover assembly 20, ensuring the safety of the long-term operation of the linear motor 100.

[0101] Thirdly, the linear motor 100 is safe, reliable, and stable when driving a load. It requires fewer components, eliminating the need for multiple motors in a conventional arrangement, thus saving costs. Each mover assembly 20 connected to a load on the same side can utilize a common stator assembly 10, and each mover assembly 20 connected to loads on different sides can also utilize a common stator assembly 10, saving components, simplifying assembly errors, and reducing processing errors.

[0102] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A linear motor, characterized in that: include: A stator assembly, the stator assembly comprising at least two yoke plates arranged parallel to each other, at least one support portion, and a plurality of groups of magnetic steels, wherein an accommodation space is formed between two adjacent yoke plates; At least one of the support portions is connected to two adjacent magnetic yoke plates and is disposed in the accommodation space to divide the accommodation space into at least two movable spaces; two groups of matching magnetic steels are arranged in each movable space, and the two groups of magnetic steels are respectively disposed on the first inner wall and the second inner wall of the two magnetic yoke plates disposed opposite to each other in the movable space, and the movable space has an opening; Multiple mover assemblies, at least two of which are provided in the same moving space, and a portion of the mover assembly in each moving space extends outward from the opening to connect to a load, and in response to different load modes of the linear motor, drives different mover assemblies to move linearly along the moving space; Yoke guard plates, two of which are provided at each of the openings, the two yoke guard plates covering part of the opening, the two yoke guard plates being connected at one end away from each other to the two yoke plates of the same opening respectively, and the two yoke guard plates being spaced apart at one end facing each other; part of the mover assembly extending outward from the gap between the two yoke guard plates to connect to the load.

2. The linear motor according to claim 1, wherein The movable subassembly includes a movable plate and a coil. The coil is arranged on the movable plate. When the coil is energized, the movable subassembly performs linear motion in the moving space.

3. The linear motor according to claim 2, wherein: The movable plate is a carbon fiber plate or an aluminum plate; and / or, The coil includes a plurality of sub-coils, the plurality of sub-coils are fixed on the movable plate at intervals, and at least some of the sub-coils can be independently energized; and / or, The coil and the movable plate are glue-sealed as a whole.

4. The linear motor according to claim 1, wherein: The support portion and the yoke plate are connected by bolts or fixedly connected; and / or, The support portion includes a main portion and at least one auxiliary portion. Both ends of the main portion are respectively vertically connected to the two yoke plates. Two side surfaces of the auxiliary portion are respectively connected to the main portion and the yoke plates.

5. The linear motor according to claim 1, wherein: One of the support parts is provided in the middle of the accommodation space and divides the accommodation space into two movement spaces, and the linear motor has a unilateral operation mode and a bilateral operation mode; or, The support portion includes a first support portion and a second support portion, the first support portion and the second support portion are arranged perpendicular to each other in the accommodating space, one end of the first support portion is perpendicularly connected to the second support portion, the other end of the first support portion extends to the first edge of the accommodating space, and both ends of the second support portion extend to the second edge and the fourth edge of the accommodating space respectively; The first supporting portion and the second supporting portion divide the accommodation space into three movement spaces, and the linear motor has a single-side operation mode, a double-side operation mode, or a three-side operation mode; or The support part includes a first support part, a second support part and a third support part, the two ends of the first support part are respectively vertically connected to the second support part and the third support part, the two ends of the second support part respectively extend to the second edge and the fourth edge of the accommodating space, and the two ends of the third support part respectively extend to the second edge and the fourth edge of the accommodating space, the first support part, the second support part and the third support part divide the accommodating space into four movable spaces, and the linear motor has a single-sided operation mode, a double-sided operation mode, a three-sided operation mode or a four-sided operation mode.

6. The linear motor according to claim 1, wherein: It also includes a side support portion, which is arranged in the moving space and is respectively connected to two adjacent yoke plates. The side support portion is arranged at the edge of the moving space and is arranged at the starting end and / or end end of the moving direction of the movable subassembly.

7. The linear motor according to claim 6, wherein: The side support portion is provided with a plurality of gas flow channels to achieve heat dissipation; and / or, At least one gas flow channel is provided on the support portion to achieve heat dissipation.

8. The linear motor according to any one of claims 1 to 7, wherein: The two groups of magnetic steels located in the same moving space are arranged in a Halbach array along the moving direction of the mover assembly.

9. Use of a linear motor according to any one of claims 1 to 8, characterized in that: Linear motion of loads used in the field of painting tin.

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