Linear motor and application thereof

Abstract

The invention discloses a linear motor and application thereof, the linear motor comprises a stator assembly and a plurality of rotor assemblies, the stator assembly comprises at least two magnet yoke plates arranged in parallel, at least one supporting part and a plurality of groups of magnetic steel, and an accommodating space is formed between two adjacent magnet yoke plates; at least one supporting part is connected with two adjacent magnet yoke plates in a supporting manner and is arranged in the accommodating space so as to divide the accommodating space into at least two moving spaces; two sets of matched magnetic steel are arranged in each moving space, the two sets of magnetic steel are correspondingly arranged on the first inner wall and the second inner wall, oppositely arranged, of the two magnet yoke plates in the moving space respectively, and the moving space is provided with an opening. At least two rotor assemblies are arranged in the same moving space, and part of the rotor assembly in each moving space extends outwards from the opening to be connected with a load, so that different rotor assemblies are driven to linearly move along the moving space in response to different load modes of the linear motor. According to the linear motor, the thrust modes are diversified, and the rotor structure is small and exquisite.

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 more and more automated, especially in the highly integrated and automated semiconductor field. In the chip manufacturing and packaging process, the chip is usually bonded to the substrate by soldering, and then the chip is packaged through other processes. When the chip is bonded with tin, the distribution of the tin, the bonding uniformity of the tin, and the thickness of the tin film need to be guaranteed to a certain extent, and the phenomenon of tin film voids should not occur. Therefore, the tinning equipment is required to have high operating accuracy and low vibration. Then, a motor with a stable and animated tin head is needed.

[0004] The thrust of the motor used in the existing tinning equipment cannot meet the required requirements, nor can it meet the occasions where multiple motion conditions are matched at the same time. The motor usually uses a larger mover to achieve a greater thrust, which makes the motor bulky and prone to bubbles during the glue filling process when manufacturing the mover. The poor uniformity of the glue filling makes the mover surface flatness and rigidity poor, and it is easy to deform under force. When a larger mover is used, the movement range of the mover is also extremely limited, and high-frequency vibration is prone to occur during the movement of the mover. The use of a larger mover also requires the arrangement of a larger magnet. The magnetic field strength generated by the magnet is stronger. When the thickness of the yoke plate on the stator is insufficient, it is easy to deform under a large magnetic force, making the motor unable to operate normally. This will eventually lead to an 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, aiming to achieve multi-operation mode operation and provide a variety of thrusts, and each movable component 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 magnetic steels, and a storage space is formed between two adjacent yoke plates; at least one of the support portions is supported and connected to two adjacent yoke plates and is arranged in the storage space to divide the storage space into at least two moving spaces; two matching groups of magnetic steels are arranged in each of the moving spaces, and the two groups of magnetic steels 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 arranged 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] It can be seen from the above technical solutions 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 for linear movement, and 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 different movable sub-assemblies are assembled. It can be a combination of different movable sub-assemblies in multiple moving spaces, or it can be a combination 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 small and easy to process. When the assembled operation is stable, 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 comprises 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 glued together.

[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 single-sided operation mode and a double-sided 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 are respectively extended to the second edge and the fourth edge of the accommodating space, the two ends of the third support part are respectively extended 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 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 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 also includes a yoke guard plate, two yoke guard plates are provided at each opening, 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 proposes the 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 make linear motion in the tin painting process, and the linear motor drives the load to make linear motion.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of 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 accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained like these accompanying drawings without paying 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. 2 , 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 a three-dimensional structure of a linear motor without a moving component;

[0026] Figure 7 is a schematic diagram of the structure 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] Fig. 9 It is a schematic diagram of the cooperation between a support portion and a yoke plate proposed in some embodiments of the present invention, and dividing the accommodation space between the two yoke plates into two moving spaces, in which a yoke plate and other components are omitted;

[0029] Fig.10It 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 moving spaces, in which a yoke plate and other components are omitted;

[0030] Fig.11 It 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 moving spaces, in which a yoke plate and other components are omitted;

[0031] Fig.12 It is a 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. Supporting part; 12a. Main body; 12b. Auxiliary part;

[0037] 121, first supporting portion; 122, second supporting portion; 123, third supporting 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. Mobile space; 151. Opening;

[0043] 20. mover assembly; 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0047] In the absence of conflict, the following embodiments and features of the embodiments 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, a larger coil mover is used in the prior art. In the process of preparing the mover, the coil mover using 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 or insufficient glue will appear in the epoxy resin glue, resulting in a lack of glue on the surface of the mover, poor heat dissipation during operation, and high-frequency vibration. The entire motor is large in size and inconvenient to arrange in precision equipment. The larger the coil mover, the shorter the stroke in a limited space; in order to make the coil mover move, the volume of the stator magnet steel required is also larger, so that the yoke plate will be subjected to a larger magnetic attraction. Without increasing the thickness of the yoke plate, the yoke plate of the motor is very easy to deform, affecting the safe operation of the motor, and the output force is unstable, resulting in poor quality of the tinning process; and the above-mentioned coil mover can only be soldered once, with 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, the embodiment of the present invention provides a linear motor 100, the output thrust of the motor is adjustable, and multiple loads can be driven to move. The motor's moving subassembly has a compact structure, high operating stability, and good quality.

[0051] The linear motor 100 provided 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 a receiving 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, and in this case, a receiving 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, and in this case, a receiving space 14 is formed between each two adjacent yoke plates 11, so there are two layers of receiving space 14. By analogy, the number of receiving 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 moving 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, two groups of matched magnetic steels 13 are arranged in each moving space 15, and the two groups of magnetic steels 13 are respectively arranged on the first inner wall and the second inner wall of the two magnetic yoke plates 11 in the moving space 15, and the moving space 15 has an opening 151. It should be noted that the two groups of magnetic steels 13 in the moving space 15 are magnetized in advance, and a certain magnetic field can be formed between each group of magnetic steels 13.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, the same moving space 15 is provided with at least two moving subassemblies 20, and a portion of the moving subassembly 20 of each moving space 15 extends outward from the opening 151 to connect the load, and in response to different load modes of the linear motor 100, different moving subassemblies 20 are driven to move linearly along the moving space 15. Here, the moving subassembly 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 scheme, it can be seen that the linear motor 100 proposed in the present invention can be divided into a plurality of mobile spaces 15 without interfering with each other in the same accommodating space 14, and a plurality of movable sub-assemblies 20 can be arranged in each mobile space 15 for linear movement, and each movable sub-assembly 20 can be independently controlled or coordinated and controlled 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 that different movable sub-assemblies 20 of multiple moving spaces 15 are assembled, 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 that different movable sub-assemblies 20 of a single-sided moving space 15 are assembled, 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 than two, unless otherwise clearly and specifically defined.

[0060] It can be understood that compared with the larger movers and motors with non-adjustable 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 be a single-layer accommodation space 14 formed by two parallel layers of yoke plates 11, or can be a double-layer accommodation space 14 formed by three parallel layers of yoke plates 11, or can be a plurality of layers of accommodation space 14, which are not limited here and should all be within the protection scope of the present invention. The following embodiments of the present invention are based on the stator assembly 10 of a single-layer accommodation space 14 formed by two parallel layers of yoke plates 11 to illustrate the specific structure, and the structure and position of each component in the accommodation space 14 of other layers can refer to the structure and design position of the single-layer accommodation space 14.

[0062] In some embodiments of the invention, Figure 7 As shown, the movable subassembly 20 includes a movable plate 21 and a coil 22. The coil 22 is arranged on the movable plate 21. When the coil 22 is energized, the movable subassembly 20 performs linear motion in the moving space 15. In other words, the movable plate 21 provides the required structural basis for arranging the coil 22. The coil 22 can be fully distributed on the movable plate 21. The number of coils 22 on the movable plate 21 is adjustable to maximize the use of the space of the movable plate 21. When the coil 22 is energized, the energized coil 22 can achieve linear motion in different directions in the magnetic field formed by the two groups of magnetic steels 13 in the moving 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, with good rigidity, 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, has good heat dissipation efficiency, is not easy to vibrate, and is conducive to improving 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, if Figure 7 As shown, the coil 22 includes a plurality of sub-coils 221, and the plurality of sub-coils 221 are fixed at intervals on the movable plate 21, and at least some of the sub-coils 221 can be energized independently. In the present invention, by controlling the conduction of some of the sub-coils 221, the thrust of a single mover assembly 20 can be controlled, and the moving speed of a single mover assembly 20 can also be controlled. The number of sub-coils 221 is adjustable, so as to make full use of the layout space of the movable plate 21, thereby increasing the thrust of the linear motor 100, 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 as one body. After sealing, the coil 22 and the movable plate 21 can be formed into one body, and the overall strength of the mover assembly 20 is improved, the deformation probability of the mover assembly 20 is reduced, and it can better adapt to high-speed operation and accelerated operation.

[0066] Alternatively, if Figure 7 As shown, the portion of the movable plate 21 extending out of the moving space 15 is provided with an assembly hole 211, so as to facilitate connection with the load. At the same time, when the coil 22 is arranged, it is also necessary to avoid the assembly hole 211, and the coil 22 is arranged in the moving space 15 as much as possible.

[0067] In some embodiments of the invention, in combination with 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 parts are damaged, the disassembly of the two can be completed by removing the bolts, which is convenient for maintenance, reduces maintenance costs, and has low processing difficulty. 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 mobile 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 materials. In some specific examples, the support portion 12 and the yoke plate 11 are fixedly connected, which can be bonding or welding. In other examples, the support portion 12 and the yoke plate 11 can also be made as an integral connection.

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

[0069] Alternatively, if 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 in the shape of an "I". 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 between 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 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, so that the electromagnetic field in each moving space 15 can be isolated, 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, in combination with Figure 1 and Fig. 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 single-sided operation mode and a double-sided 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 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 the unilateral operation mode for movement of 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 and carry two loads respectively, they can also drive the two loads to move separately. When there is a movable subassembly 20 in each of the two moving spaces 15, the linear motor 100 is in a bilateral operation mode. At this time, each movable subassembly 20 in the two moving spaces 15 can operate independently, and can provide thrusts of 150N and 300N on both sides respectively; different movable subassemblies 20 in the two moving spaces 15 can also be combined and operated, and the thrusts can be 300N (one movable subassembly 20 on each side), 450N (two movable subassemblies 20 in one moving space 15 are operating, and one movable subassembly 20 in the other moving space 15 is operating), or 600N (two movable subassemblies 20 in the moving spaces 15 on both sides are operating); at the same time, the movable subassemblies 20 on both sides can also move the load, and a maximum of four load movements 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 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 mobile space 15 in these examples can also be three, four or other numbers, which are not limited here. In addition, when the movable subassembly 20 in the mobile space 15 operates independently, the movable subassembly 20 can drive the load to move 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, in combination with Figure 2 and Fig.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 perpendicularly to each other in the accommodation space 14, one end of the first support portion 121 is perpendicularly connected to the second support portion 122, the other end of the first support portion 121 extends to the first edge 141 of the accommodation space 14, and the two ends of the second support portion 122 extend to the second edge 142 and the fourth edge 144 of the accommodation space 14 respectively; thus, the first support portion 121 and the second support portion 122 divide the accommodation space 14 into three moving spaces 15, and the linear motor 100 has a single-side operation mode, a double-side operation mode or a three-side operation mode. In these examples, the first support portion 121 and the second support portion 122 form a "T" shape arrangement, and the accommodation space 14 is also divided into three parts of the moving space 15, and the openings 151 of the three moving spaces 15 are respectively located at the second edge 142, the third edge 143 and the fourth edge 144 of the accommodation space 14.

[0075] Next, the three operation modes of the linear motor 100 are described by taking the case where the maximum bearing thrust of the mover assembly 20 is 150N and two mover assemblies 20 are arranged in each moving space 15 as an example. When the linear motor 100 is in the unilateral operation mode, one mover assembly 20 or two mover assemblies 20 in any one of the moving spaces 15 can be assembled to move. At this time, the linear motor 100 can provide a thrust of 150N or a thrust of 300N in the unilateral operation mode; when two mover assemblies 20 in the moving space 15 on the same side are assembled and run separately, and carry two loads respectively, the two loads can also be driven to move separately.

[0076] When two of the three moving spaces 15 each have a movable sub-assembly 20 in operation, the linear motor 100 is in a bilateral operation mode, at which 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; or different movable sub-assemblies 20 in the two moving spaces 15 can be combined and operated, and at this time, the thrusts 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 moving spaces 15 are operating, and one movable sub-assembly 20 in the other moving space 15 is operating), or 600N (two movable sub-assemblies 20 in each of the two moving spaces 15 are operating); 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 running 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 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 or 200N can be provided. Components 20 are all running, and one movable component 20 is running in each of the other two moving spaces 15), can provide 750N thrust (two of the three moving spaces 15 have two movable components 20 running, and the other moving space 15 has one movable component 20 running), and can also provide 900N thrust (two movable components 20 are running in each of the three moving spaces 15). At the same time, in the three-side operation mode, the movable components 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 movable components 20 in the moving space 15 are running independently, the movable components 20 can drive the load to move at high speed, with short response time and fast running 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 mobile 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, in combination with Figure 3 and Fig.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 two ends of the first support portion 121 are respectively connected to the second support portion 122 and the third support portion 123 vertically, the two ends of the second support portion 122 are respectively extended to the second edge 142 and the fourth edge 144 of the accommodating space 14, the two ends of the third support portion 123 are respectively extended to the second edge 142 and the fourth edge 144 of the accommodating space 14, the first support portion 121, the second support portion 122 and the third support portion 123 divide the accommodating space 14 into four moving spaces 15, and the linear motor 100 has a single-side operation mode, a double-side operation mode, a three-side operation mode or a four-side operation 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 as a whole, thereby dividing the accommodating space 14 into four moving 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] Next, the four operation modes of the linear motor 100 are described by taking the case where the maximum bearing thrust of the movable subassembly 20 is 150N and two movable subassemblies 20 are arranged in each moving space 15 as an example. When the linear motor 100 is in the unilateral operation mode, one movable subassembly 20 or two movable subassemblies 20 in any one of the four moving spaces 15 can be assembled to move. At this time, the linear motor 100 can provide a thrust of 150N or 300N in the unilateral operation mode; when two movable subassemblies 20 in the moving space 15 on the same side are assembled and run separately, and carry two loads respectively, they can also drive the two loads to move separately.

[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 which time, each movable sub-assembly 20 in two of the moving spaces 15 can be independently operated, and can provide thrusts of 150N and 300N on both sides respectively; or different movable sub-assemblies 20 in any two of the moving spaces 15 can be combined and operated, and at this time, the thrusts can be 300N (one movable sub-assembly 20 in each of the two moving spaces 15 is in operation), 450N (two movable sub-assemblies 20 in one of the two moving spaces 15 are in operation, and one movable sub-assembly 20 in the other selected moving space 15 is in operation), or 600N (two movable sub-assemblies 20 in each of the two selected moving spaces 15 are in operation); 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 running 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 in each of the three selected moving spaces 15 is running), a thrust of 600N can be provided (one moving subassembly 20 in each of the three selected moving spaces 15 is running), and a thrust of 150N or 200N can be provided. One of the two movable spaces 15 has two movable assemblies 20 in operation, while the other two movable spaces 15 each have one movable assembly 20 in operation), can provide a thrust of 750N (two of the three selected movable spaces 15 have two movable assemblies 20 in operation, while the other movable space 15 has one movable assembly 20 in operation), and can also provide a thrust of 900N (two of the three selected movable spaces 15 each have two movable assemblies 20 in operation). At the same time, in the three-side operation mode, the movable assemblies 20 in the three selected movable spaces 15 of the linear motor 100 can drive the load to move in three directions.

[0083] When the mover assemblies 20 are all running in the four moving spaces 15, the linear motor 100 is in the four-side running mode, and each mover assembly 20 in the four moving spaces 15 can be independently operated. At this time, the mover assembly 20 in each moving space 15 can provide a thrust of 150N or 300N; when different mover assemblies 20 in the four moving spaces 15 are combined and operated, a thrust of 600N can be provided (one mover assembly 20 in each of the four moving spaces 15 is running), a thrust of 750N can be provided (two mover assemblies 20 in one of the four moving spaces 15 are both running), and a thrust of 1000N can be provided (two mover assemblies 20 in one of the four moving spaces 15 are both running). In the four-side operation mode, the linear motor 100 can provide a thrust of 900N (two of the four moving spaces 15 have two moving sub-assemblies 20 in operation, while the other two moving spaces 15 have one moving sub-assembly 20 in operation), a thrust of 1050N (three of the four moving spaces 15 have two moving sub-assemblies 20 in operation, while the fourth moving space 15 has one moving sub-assembly 20 in operation), and a thrust of 1200N (two moving sub-assemblies 20 in operation in each of the four moving spaces 15). At the same time, in the four-side operation mode, the moving sub-assemblies 20 in the four moving spaces 15 of the linear motor 100 can drive the load to move in four directions, which greatly improves the operation efficiency and enriches 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, has a short response time, a fast operating speed, and can drive the load to move quickly and at 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 mobile 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, which is disposed in the moving space 15 and is respectively connected to two adjacent yoke plates 11. The side support portion 30 is disposed at the edge of the moving space 15 and is disposed 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 for the edges of the two yoke plates 11, so that the gap between the two yoke plates 11 is kept 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 magnetic steel 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 leakage magnetic flux 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 is convenient for machining and improves the assembly accuracy of parts. There is no need for assembly, and there will be no assembly error caused by assembling the side support portion 30.

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

[0090] Advantageously, at least one gas flow channel is provided on the support portion 12 to achieve heat dissipation. For example, a certain gas flow channel can be provided in a portion of the support portion 12 close to 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 further includes a yoke guard plate 40, two yoke guard plates 40 are provided at each opening 151, the two yoke guard plates 40 shield part of the opening 151, the ends of the two yoke guard plates 40 away from each other are respectively connected to the two yoke plates 11 of the same opening 151, and the two yoke guard plates 40 are spaced apart from each other at one end; a part of the mover assembly 20 extends outward from the gap between the two yoke guard plates 40 to connect the load. By providing the yoke guard plates 40 at the opening 151, magnetic foreign matter can be effectively prevented from being adsorbed by the magnetic steel 13 in the moving space 15, thereby avoiding failure of the linear motor 100 during operation.

[0092] Optionally, the gap between the two yoke guard plates 40 is preferably not less than the thickness of the mover assembly 20 , so that the mover assembly 20 does not touch the yoke guard plates 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 moving subassembly 20. The moving subassembly 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 moving subassembly 20, making the moving subassembly 20 structure lighter and 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 Fig.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 and repeatedly arranged multiple times along the moving direction of the moving subassembly 20, wherein the first magnetic steel 131 and the third magnetic steel 133 are radially magnetized and the magnetization directions are opposite; the second magnetic steel 132 and the fourth magnetic steel 134 are axially magnetized and the magnetization directions are opposite, so that the strongest magnetic field can be generated with the least amount of magnetic steel 13, ensuring that the moving subassembly 20 has sufficient magnetic force for electromagnetic induction movement during operation, and ensuring the stable operation of the linear motor 100. Optionally, the widths of two adjacent magnetic steels 13 can be set differently, for example, the widths of the first magnetic steel 131 and the third magnetic steel 133 can be larger, and the widths of the second magnetic steel 132 and the fourth magnetic steel 134 can be smaller, so that the number of magnetic steels 13 arranged in the same space can be greater.

[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 applied to the linear motion of a load in the field of drawing tin.

[0096] The application of the linear motor 100 proposed by the present invention is that the linear motor 100 can be used for loads that need to make linear motion in the field of tin painting, and the linear motor 100 drives the load to make linear motion. The linear motor 100 can drive multiple loads on the same straight line to reciprocate along the straight line, thereby saving the number of linear motors 100 that need to drive multiple loads to make linear motion on the same straight line; it can also drive different loads on multiple straight lines to make linear motion, thereby saving the number of linear motors 100 that need to drive multiple loads to run on different straight lines in multiple directions, saving the number of arrangements of the linear motor 100 and saving costs.

[0097] Optionally, the linear motor 100 is applied to the tinning equipment, and the linear motor 100 is used to drive the tinning load (such as the tinning head) to move linearly. The linear motor 100 of the present invention can select the mover assembly 20 of each moving space 15 from the linear motor 100 for power supply according to the thrust requirement of the tinning load and / or the moving direction of the tinning load, so that the selected multiple mover assemblies 20 are connected to multiple tinning loads and drive the multiple tinning loads to move linearly, and the work of multiple tinning heads can be realized. Thereby, the operation mode of the tinning equipment is diversified and the operation efficiency is high when 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 small structure and a compact layout. The mover assembly 20 maximizes and maximizes the coil 22, which not only improves the thrust, but also increases the number of turns of the coil 22. The coil 22 dissipates heat quickly and the temperature rises slowly. The mover assembly 20 is light in weight, and a single mover assembly 20 can achieve fast response and high-speed movement when it is running. The side support portion 30 provided with a gas flow channel can also enable the mover assembly 20 to dissipate heat quickly, providing the safety of the long-term operation of the linear motor 100.

[0101] Thirdly, when the linear motor 100 drives the load to run, it is safe, reliable, and stable, requires fewer parts, saves multiple motors in the traditional arrangement, and saves costs. Each mover assembly 20 connected to the load on the same side can use a common stator assembly 10, and each mover assembly 20 connected to the load on different sides can also use a common stator assembly 10, which saves parts, simplifies assembly errors, and reduces processing errors.

[0102] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope 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 a receiving space is formed between two adjacent yoke plates; At least one of the support parts is connected to the two adjacent yoke plates and is arranged in the accommodation space to divide the accommodation space into at least two moving spaces; two groups of matching magnetic steels are arranged in each of the moving spaces, and the two groups of magnetic steels are respectively arranged on the first inner wall and the second inner wall of the two yoke plates in the moving space that are arranged opposite to each other, and the moving space has an opening; There are multiple movable sub-assemblies, and at least two movable sub-assemblies are arranged in the same movable space, and part of the movable sub-assembly of each movable space extends outward from the opening to connect the load, responding to different load modes of the linear motor, driving different movable sub-assemblies to move linearly along the movable space.

2. The linear motor according to claim 1, characterized in that: The mover assembly comprises a movable plate and a coil. The coil is arranged on the movable plate. When the coil is energized, the mover assembly performs linear motion in the moving space.

3. The linear motor according to claim 2, characterized in that: The movable plate is a carbon fiber plate or an aluminum plate; and / or, The coil comprises 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 energized independently; and / or, The coil and the movable plate are glue-sealed as a whole.

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

5. The linear motor according to claim 1, characterized in that: One of the support parts is arranged in the middle of the accommodation space and divides the accommodation space into two movement spaces, and the linear motor has a single-side operation mode and a double-side 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 accommodation 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 accommodation space, and both ends of the second support portion extend to the second edge and the fourth edge of the accommodation space respectively; The first supporting part and the second supporting part divide the accommodating space into three moving 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, two ends of the first support part are respectively vertically connected to the second support part and the third support part, two ends of the second support part respectively extend to the second edge and the fourth edge of the accommodating space, 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, characterized in that: 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 at the beginning and / or end of the moving direction of the mover assembly.

7. The linear motor according to claim 6, characterized in that: 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, characterized in that: It also includes a yoke guard plate, two of which are provided at each opening, 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.

9. The linear motor according to claim 8, characterized in that: 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.

10. An application of a linear motor as claimed in any one of claims 1 to 9, characterized in that: Linear motion of loads applied in the field of tin painting.

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