A core structure, a stator assembly and a linear motor

Abstract

The utility model discloses a kind of iron core structure, stator assembly and linear motor, iron core structure includes iron core unit, iron core unit includes several arrayed iron core groups, iron core group includes iron core monomer, first coil and second coil, iron core monomer has first connecting arm and second connecting arm opposite with first connecting arm, first coil is set on first connecting arm, second coil is set on second connecting arm, and first coil and second coil are parallel arrangement. The utility model is divided into several independent arrayed iron core groups by iron core unit, so that the overall layout of iron core structure can be flexibly adjusted according to actual power demand, installation space size, to improve the versatility and scalability of linear motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a core structure, stator assembly and linear motor. Background Technology

[0002] In linear motors with an iron core, the iron core structure is the core component. Currently, traditional iron core structures mostly adopt an integrated design, that is, a closed magnetic circuit is formed by integral lamination or integral molding, and the coils are concentrated and wound on the same magnetic post or adjacent magnetic posts of the iron core.

[0003] However, because this type of integrated iron core is molded as a whole, its size and structure are fixed, making it difficult to flexibly adjust the coil arrangement and number according to different power requirements or installation space, resulting in poor equipment versatility and adaptability. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a core structure, stator assembly and linear motor, which aims to improve the versatility and scalability of the linear motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a core structure, including a core unit, wherein the core unit includes a plurality of core groups arranged in a row, the core group including a core unit, a first coil and a second coil, the core unit having a first connecting arm and a second connecting arm opposite to the first connecting arm, the first coil being sleeved on the first connecting arm, the second coil being sleeved on the second connecting arm, and the first coil and the second coil being arranged in parallel.

[0007] Furthermore, the iron core unit is provided with a groove with a top opening, the groove having a first sidewall and a second sidewall opposite to the first sidewall, the first sidewall forming the first connecting arm, and the second sidewall forming the second connecting arm.

[0008] Furthermore, an insulating element is provided between the first coil and the iron core unit, and the insulating element is also provided between the second coil and the iron core unit.

[0009] Furthermore, the insulating element is disposed within the groove.

[0010] Secondly, this utility model also provides a stator assembly, including a base and the aforementioned iron core structure, wherein the base is provided with a mounting cavity, and the iron core unit is fixed in the mounting cavity.

[0011] Furthermore, the mounting cavity is also provided with end teeth, which are located on both sides of the iron core unit.

[0012] Furthermore, the bottom of the mounting cavity is provided with a positioning groove, and the bottom of the iron core unit is embedded in the positioning groove.

[0013] Thirdly, this utility model also provides a linear motor, including a mover assembly, a linear guide module and the aforementioned stator assembly. The linear guide module is disposed between the mover assembly and the stator assembly, and the mover assembly is slidably disposed relative to the stator assembly. The mover assembly includes a motion plate, a magnet mounting plate and a plurality of individual magnets. The motion plate is provided with a groove, the magnet mounting plate is embedded in the groove, and the individual magnets are connected to the magnet mounting plate.

[0014] Furthermore, the linear guide module includes at least one guide rail and at least one slider, the slider being slidably disposed on the guide rail, the guide rail being fixedly connected to the base, and the slider being fixedly connected to the motion plate.

[0015] Furthermore, it also includes a mounting plate, a first hook, a second hook, and an elastic element. The mounting plate is connected to the base, the first hook is connected to the mounting plate, the second hook is connected to the moving plate, and the two ends of the elastic element are respectively connected to the first hook and the second hook.

[0016] The advantages of this invention compared to existing technologies are as follows: A core structure includes a core unit, which comprises several core groups arranged in a row. Each core group includes a single core element, a first coil, and a second coil. The single core element has a first connecting arm and a second connecting arm opposite to the first connecting arm. The first coil is sleeved on the first connecting arm, and the second coil is sleeved on the second connecting arm, with the first and second coils arranged side-by-side. By dividing the core unit into several independently arranged core groups, this invention allows the overall layout of the core structure to be flexibly adjusted according to actual power requirements and installation space, thereby improving the versatility and scalability of the linear motor.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of a linear motor is provided for a specific embodiment of this utility model;

[0020] Figure 2 An exploded view of a linear motor provided for a specific embodiment of this utility model;

[0021] Figure 3 An exploded view of a stator assembly provided for a specific embodiment of this utility model;

[0022] Figure 4 An exploded view of the core unit provided in a specific embodiment of this utility model;

[0023] Figure 5 A schematic diagram of the structure of a single iron core unit provided in a specific embodiment of this utility model;

[0024] Figure 6 An exploded view of the moving part assembly provided in a specific embodiment of this utility model.

[0025] Figure Labels

[0026] 1. Stator assembly; 11. Core unit; 111. Core group; 1111. Core unit; 1111. First connecting arm; 11112. Second connecting arm; 11113. Groove; 11114. Bottom connecting part; 111141. Connecting hole; 1112. First coil; 1113. Second coil; 12. Base; 121. Mounting cavity; 1211. Positioning groove; 13. End tooth; 2. Mover assembly; 21. Motion plate; 211. Slot; 22. Magnet mounting plate; 23. Single magnet; 3. Linear guide module; 31. Guide rail; 32. Slider; 4. Mounting plate; 5. First hook; 6. Second hook; 7. Elastic element. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] like Figures 2 to 5 As shown, this utility model embodiment provides a core structure, including a core unit 11. The core unit 11 includes a plurality of core groups 111 arranged in a row. The core group 111 includes a core unit 1111, a first coil 1112, and a second coil 1113. The core unit 1111 has a first connecting arm 11111 and a second connecting arm 11112 opposite to the first connecting arm 11111. The first coil 1112 is sleeved on the first connecting arm 11111, and the second coil 1113 is sleeved on the second connecting arm 11112. The first coil 1112 and the second coil 1113 are arranged in parallel.

[0034] The core unit 11 is formed by arranging several core groups 111 sequentially along a preset direction. The number of core groups 111 can be flexibly determined according to the power requirements in the actual application scenario, and adjacent core groups 111 are arranged close together.

[0035] The core unit 1111 is made of laminated silicon steel sheets and has a first connecting arm 11111 and a second connecting arm 11112 that are parallel to each other and arranged opposite to each other, as well as a bottom connecting part 11114 connected to the bottom of both. The first coil 1112 and the second coil 1113 are both made of enameled copper wire. The hollow parts of the two form a socket area. The length and width of the socket area must be adapted to the length and width of the first connecting arm 11111 and the second connecting arm 11112 so that the first coil 1112 can be tightly fitted on the first connecting arm 11111 and the second coil 1113 can be tightly fitted on the second connecting arm 11112. The first coil 1112 and the second coil 1113 are arranged side by side along the length of the core unit 1111 and are arranged close to each other.

[0036] By dividing the core unit 11 into several independently arranged core groups 111, users can flexibly increase or decrease the number of core groups 111 according to actual power requirements, so that the overall layout of the core structure can be flexibly adjusted according to actual power requirements and installation space size, thereby improving the versatility and scalability of the linear motor.

[0037] In one embodiment, such as Figure 5As shown, the iron core unit 1111 has a groove 11113 with a top opening. The groove 11113 has a first sidewall and a second sidewall opposite to the first sidewall. The two ends of the groove 11113 in the length direction are open ends. The first sidewall forms a first connecting arm 11111 and the second sidewall forms a second connecting arm 11112.

[0038] The first and second sidewalls of the groove 11113 extend along the height direction of the core unit 1111 and are both perpendicular to the bottom of the core unit 1111. The two ends of the groove 11113 along its length are open ends, which penetrate the corresponding end faces of the core unit 1111, forming a through-channel structure inside the groove 11113. The first sidewall constitutes the aforementioned first connecting arm 11111, and the second sidewall constitutes the aforementioned second connecting arm 11112. Both sidewalls have the same thickness and are integrally formed with the bottom of the core unit 1111 to ensure the integrity and stability of the structure.

[0039] During assembly, the first coil 1112 and the second coil 1113 can be respectively fitted into the first connecting arm 11111 and the second connecting arm 11112 through the top opening of the groove 11113. Since both ends of the groove 11113 are open along its length, they will not obstruct or interfere with the fitting of the first coil 1112 and the second coil 1113. After the first coil 1112 and the second coil 1113 are fitted in, a portion of both will be located within the groove 11113, and their axial directions will be consistent with the length direction of the groove 11113.

[0040] The first and second sidewalls of the groove 11113 respectively form the first connecting arm 11111 and the second connecting arm 11112, making the structural design of the iron core unit 1111 more integrated, reducing the assembly process of the traditional split connecting arm, and reducing production errors. The open end design of the groove 11113 in the length direction provides a convenient operation path for the coil (first coil 1112 and second coil 1113), which facilitates the rapid assembly and subsequent maintenance of the coil. At the same time, the closed bottom connecting part 11114 of the groove 11113 can provide a certain support for the coil, preventing the coil from being displaced due to vibration during operation, and improving the stability of the structure.

[0041] In one embodiment, an insulating element is provided between the first coil 1112 and the second coil 1113 and the core unit 1111 to achieve electrical isolation between the coils and the core unit 1111. The insulating element can be insulating paper made of polyimide material. During installation, the insulating element is first placed in the groove 11113, and then the first coil 1112 and the second coil 1113 are respectively inserted into the first connecting arm 11111 and the second connecting arm 11112.

[0042] like Figures 1 to 5 As shown, this utility model embodiment also provides a stator assembly 1, including a base 12 and the above-mentioned iron core structure. The base 12 is provided with a mounting cavity 121, and the iron core unit 11 is fixed in the mounting cavity 121. End teeth 13 are also fixed in the mounting cavity 121, and the end teeth 13 are located on both sides of the iron core unit 11.

[0043] In one embodiment, the mounting cavity 121 and the base 12 are integrally formed, that is, the mounting cavity 121 and the base 12 are combined into one. With this design, after the iron core unit 1111 is fixed in the mounting cavity 121 after being externally riveted, the coil is then inserted, and finally the mounting cavity 121 is encapsulated and cured with epoxy resin to form a whole. This eliminates the need for a large number of encapsulation operations and helps with mass production.

[0044] In one embodiment, the bottom of the mounting cavity 121 is provided with a positioning groove 1211, and the bottom of each core unit 1111 in the core unit 11 is embedded in the positioning groove 1211 to achieve precise positioning and fixation of the core unit 11 in the mounting cavity 121. The number of positioning grooves 1211 is the same as the number of core units 1111 in the core unit 11, and they are arranged sequentially along the arrangement direction of the core group 111. The spacing between each positioning groove 1211 is adapted to the spacing between adjacent core groups 111.

[0045] The cross-sectional shape of the positioning groove 1211 matches the cross-sectional shape of the bottom connecting part 11114 of the iron core unit 1111. Its length is slightly greater than the length of the bottom of the iron core unit 1111, and its width is slightly greater than the width of the bottom of the iron core unit 1111, so as to ensure that the bottom of the iron core unit 1111 can be smoothly inserted and there is no obvious shaking after insertion.

[0046] To further enhance the fixing effect, connection holes 111141 can be provided at the bottom connecting part 11114 of the iron core unit 1111 and at the bottom of the positioning groove 1211. The iron core unit 1111 and the mounting cavity 121 can be fixedly connected by screwing screws into the connection holes 111141.

[0047] like Figures 1 to 6 As shown, this utility model embodiment also provides a linear motor, including a mover assembly 2, a linear guide module 3 and the aforementioned stator assembly 1. The linear guide module 3 is disposed between the mover assembly 2 and the stator assembly 1, and the mover assembly 2 is slidably disposed relative to the stator assembly 1.

[0048] In one embodiment, such as Figure 6As shown, the mover assembly 2 includes a motion plate 21, a magnet mounting plate 22, and several individual magnets 23. The motion plate 21 has a groove 211, in which the magnet mounting plate 22 is embedded. The individual magnets 23 are connected to the magnet mounting plate 22. The advantage of this design is that the material used for magnet mounting must be a magnetically conductive material, such as 45# steel or Q235A, which are characterized by high density and large mass. If the magnets were directly attached to the motion plate 21, the motion plate 21 would have to be made of a magnetically conductive material, increasing its overall weight. By embedding the magnet mounting plate 22 into the motion plate 21, the motion plate 21 can be replaced with a lighter aluminum material, requiring only the magnet mounting plate 22 to be a magnetically conductive material. This effectively reduces the overall weight of the mover assembly 2, thereby reducing the ineffective power consumption of the linear motor.

[0049] The magnet mounting plate 22 is fixed to the mounting plate 21 by screws through its own mounting holes, and then the magnets are glued to the magnet mounting plate 22 with anaerobic AB glue; several magnets on the magnet mounting plate 22 are arranged in N / S / N / S order.

[0050] In one embodiment, such as Figure 2 As shown, the linear guide module 3 includes at least one guide rail 31 and at least one slider 32. The slider 32 is slidably disposed on the guide rail 31. The guide rail 31 is fixedly connected to the base 12, and the slider 32 is fixedly connected to the motion plate 21.

[0051] The guide rail 31 is made of alloy steel and has an "I"-shaped cross-section. It includes a rail head, rail web, and rail base extending along its length. The width of the rail base is greater than the width of the rail head, and several through holes evenly distributed along its length are formed on the rail base. The top of the base 12 has a mounting surface corresponding to the guide rail 31, which is adapted to the rail base. Threaded holes corresponding to the through holes in the rail base are formed on the mounting surface. The guide rail 31 is screwed to the threaded holes in the base 12 by bolts passing through its rail base through holes. The bolt heads are recessed into the countersunk holes in the rail base to avoid interference with the slider 32. The length of the guide rail 31 extends along the sliding direction of the mover assembly 2. The top of the slider 32 is fixedly connected to the bottom of the moving plate 21 by screws.

[0052] In one embodiment, such as Figure 2 As shown, two sets of guide rails 31 of equal height are arranged on each side of the mounting cavity 121 of the base 12, that is, a total of four sets of guide rails 31. Each guide rail 31 is equipped with a slider 32, and the two sets of guide rails 31 on the same side of the mounting cavity 121 are arranged side by side. This design improves the load-bearing capacity and torsional resistance compared to a single set of guide rails 31.

[0053] It should be noted that as the width and length of linear motors increase, four sets of guide rails 31 may not be sufficient to meet the requirements. Therefore, two or more sets of guide rails 31 can be added or removed as needed, and the addition or removal can be done in the direction of side-by-side arrangement.

[0054] In one embodiment, such as Figure 1 and Figure 2 As shown, the linear motor also includes a mounting plate 4, a first hook 5, a second hook 6, and an elastic element 7. The mounting plate 4 is connected to the base 12, the first hook 5 is connected to the mounting plate 4, the second hook 6 is connected to the motion plate 21, and the two ends of the elastic element 7 are connected to the first hook 5 and the second hook 6, respectively.

[0055] Mounting plate 4 is a flat plate made of steel plate. The bottom of mounting plate 4 is fixedly connected to the end of base 12 by bolts, so that mounting plate 4 and base 12 are perpendicular. Mounting plate 4 is provided with threaded holes. The first hook 5 is fastened to the threaded hole of mounting plate 4 through the threaded end to realize the connection between the first hook 5 and mounting plate 4. Similarly, the threaded end of the second hook 6 is fastened to the threaded hole of moving plate 21 to realize the connection between the second hook 6 and moving plate 21. The two ends of elastic member 7 are hung between the first hook 5 and the second hook 6.

[0056] Taking a linear motor for Z-axis linear motion as an example, during operation, as the mover assembly 2 moves vertically downward relative to the base 12, the elastic element 7 also undergoes a stretching action. The mover assembly 2 will fall downward due to its weight. The installed elastic element 7 can counteract the weight of the mover assembly 2 and the tension of the elastic element 7, allowing the mover assembly 2 to remain in a static equilibrium state at the upper-middle position of the base 12 of the stator assembly 1. When the linear motor is energized and the mover assembly 2 moves, there is no need to consider the weight of the mover assembly 2 itself, thereby reducing the force output and improving the utilization of useful work.

[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model 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 this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A core structure, characterized in that, The device includes a core unit, which comprises several core groups arranged in a row. Each core group includes a core unit, a first coil, and a second coil. The core unit has a first connecting arm and a second connecting arm opposite to the first connecting arm. The first coil is sleeved on the first connecting arm, and the second coil is sleeved on the second connecting arm. The first coil and the second coil are arranged in parallel.

2. The core structure according to claim 1, characterized in that, The iron core unit has a groove with a top opening. The groove has a first sidewall and a second sidewall opposite to the first sidewall. The first sidewall forms the first connecting arm, and the second sidewall forms the second connecting arm.

3. The core structure according to claim 2, characterized in that, An insulating element is provided between the first coil and the iron core unit, and the same insulating element is also provided between the second coil and the iron core unit.

4. The core structure according to claim 3, characterized in that, The insulating element is disposed within the groove.

5. A stator assembly, characterized in that, The system includes a base and a core structure as described in any one of claims 1-4, wherein the base has a mounting cavity and the core unit is fixed inside the mounting cavity.

6. A stator assembly according to claim 5, characterized in that, The mounting cavity is also provided with end teeth, which are located on both sides of the iron core unit.

7. A stator assembly according to claim 5, characterized in that, The bottom of the mounting cavity is provided with a positioning groove, and the bottom of the iron core unit is embedded in the positioning groove.

8. A linear motor, characterized in that, The device includes a mover assembly, a linear guide module, and a stator assembly as described in any one of claims 5-7. The linear guide module is disposed between the mover assembly and the stator assembly, and the mover assembly is slidably disposed relative to the stator assembly. The mover assembly includes a motion plate, a magnet mounting plate, and a plurality of individual magnets. The motion plate has a groove, the magnet mounting plate is embedded in the groove, and the individual magnets are connected to the magnet mounting plate.

9. A linear motor according to claim 8, characterized in that, The linear guide module includes at least one guide rail and at least one slider. The slider is slidably disposed on the guide rail. The guide rail is fixedly connected to the base, and the slider is fixedly connected to the motion plate.

10. A linear motor according to claim 8, characterized in that, It also includes a mounting plate, a first hook, a second hook, and an elastic element. The mounting plate is connected to the base, the first hook is connected to the mounting plate, the second hook is connected to the moving plate, and the two ends of the elastic element are respectively connected to the first hook and the second hook.

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