Stator assembly and linear motor

Abstract

The utility model relates to the technical field of linear motors, and particularly discloses a stator assembly and a linear motor. The stator assembly has a width direction and a length direction, the stator assembly comprises at least one row of stator units, each row of stator units extend along the length direction, and under the condition that the stator assembly comprises multiple rows of stator units, the multiple rows of stator units are arranged along the width direction; each row of stator units comprises a plurality of stator modules which are sequentially spliced in the length direction, each stator module comprises a magnet yoke and 2n magnets, the 2n magnets are arranged on the magnet yoke at intervals in the length direction, avoiding grooves are formed in the two sides of each magnet in the length direction, n assembling holes are formed in the magnet yoke, and n is a positive integer; the assembling holes are formed between the two opposite receding grooves in every two magnets. According to the stator assembly and the linear motor, the types of materials are reduced, batch stock-up is facilitated, the space of the stator assembly in the width direction is narrowed, and the effect that splicing of multiple rows of stator units in the width direction is not interrupted is conveniently achieved.

Description

Technical Field

[0001] The present application relates to the technical field of linear motors, and in particular to a stator assembly and a linear motor. Background Art

[0002] In a linear motor, an interacting magnetic field is generated between the stator and the mover, causing the mover to slide. Currently, linear motor stators are typically designed with varying lengths based on the size of the mover, allowing for splicing and extension. However, the variety of stator lengths and widths makes stator material complex, making stocking difficult and potentially leading to inventory backlogs. Utility Model Content

[0003] In view of the above, it is necessary to propose a stator assembly and a linear motor to reduce the types of materials and facilitate batch stocking.

[0004] An embodiment of the present application provides a stator assembly, which is applied to a linear motor. The stator assembly has a width direction and a length direction. The stator assembly includes at least one row of stator units, and each row of the stator units extends along the length direction. When the stator assembly includes multiple rows of stator units, the multiple rows of stator units are arranged along the width direction, and each row of the stator units includes multiple stator modules spliced ​​in sequence along the length direction. Each of the stator modules includes a yoke and 2n magnets, wherein n is an integer greater than or equal to 1, and the 2n magnets are arranged on the yoke at intervals along the length direction. Each of the magnets is provided with avoidance grooves on both sides along the length direction. The yoke is provided with n assembly holes, and the assembly holes are provided between two opposing avoidance grooves of each two magnets.

[0005] The above-mentioned stator assembly, by setting the above-mentioned stator module, multiple stator modules can be spliced ​​in sequence to form a stator unit, and the length of the stator unit can be extended according to the size of the linear motor mover assembly to extend the length of the stator assembly or multiple rows of stator units can be set to extend the width of the stator assembly. The length and width of the stator module are fixed, and can be spliced ​​and combined according to the length and width of the linear motor mover assembly to meet the requirements, reducing the number of materials of the stator assembly to one stator module material, reducing the number of materials and facilitating batch stocking. By designing one stator module material, the production of different tooling fixtures for making the linear motor stator assembly is reduced. The mover assembly with the same pole slot scheme has and only needs to design one stator module, which is convenient for equipment production and further reduces labor costs. In addition, the way the stator assembly is installed on the linear motor base is different from the conventional installation method of mounting holes on both sides of the width. By opening avoidance grooves on both sides of the magnet, the linear motor bolts are passed through the assembly holes to connect with the linear motor base or through the linear motor base to connect with the assembly holes, and the linear motor bolts are avoided through the avoidance grooves. The linear motor bolts are installed in the middle of the stator assembly, which effectively narrows the space in the width direction of the stator assembly and facilitates the uninterrupted splicing of multiple rows of stator units in the width direction.

[0006] In some embodiments, when the stator assembly includes multiple rows of stator units and the multiple rows of stator units are arranged along the width direction, any two adjacent rows of stator units are staggered along the length direction.

[0007] In the above-mentioned stator assembly, when the width of the stator assembly increases as the number of rows of stator units increases, the slot force of the stator assembly will increase as the width of the magnet increases, thereby affecting the motion performance of the linear motor. By arranging any two adjacent rows of stator units to be staggered along the length direction, the size of the slot force can be effectively reduced.

[0008] In some embodiments, the stator units of the two outermost rows among the multiple rows of stator units have a stator unit offset distance along the length direction that is smaller than the width of the magnet along the length direction.

[0009] The above-mentioned stator assembly limits the offset distance of the two outermost rows of stator units to be smaller than the width of the magnet, thereby avoiding the same magnetic poles of the two magnets along the width direction affecting the magnetic field and the splicing in the width direction, thereby reducing the cogging force while ensuring the normal use of the stator assembly.

[0010] In some embodiments, the magnetic poles of any two adjacent magnets in the stator module are arranged in opposite directions.

[0011] The stator assembly is configured such that the magnetic poles of any two adjacent magnets are arranged in opposite directions, so that the stator module forms a continuously changing magnetic field, thereby ensuring the normal use of the stator assembly.

[0012] In some embodiments, the avoidance groove is a C-shaped through groove or a C-shaped stepped groove, and the projection of each of the magnets on the magnetic yoke does not overlap with the assembly hole.

[0013] The stator assembly described above can avoid the linear motor bolts by limiting the avoidance groove to a C-shaped groove or a C-shaped stepped groove, and can hide the linear motor bolts in the stator module, thereby reducing the thickness of the stator assembly.

[0014] In some embodiments, the assembly hole is a through hole or a threaded hole.

[0015] The above-mentioned stator assembly, by limiting the assembly hole to a through hole, the linear motor bolt can pass through the avoidance groove and the assembly hole in sequence to be connected to the linear motor base; by limiting the assembly hole to a threaded hole, the linear motor bolt can pass through the avoidance groove and the assembly hole in sequence to be connected to the linear motor base, and the linear motor bolt can also pass through the linear motor base to be connected to the assembly hole, thereby expanding the connection method between the stator assembly and the linear motor base.

[0016] In some embodiments, the stator assembly further has a thickness direction, and a thickness of the yoke along the thickness direction is greater than a thickness of the magnet along the thickness direction.

[0017] The stator assembly mentioned above limits the thickness of the yoke to be greater than the thickness of the magnet. On the one hand, the yoke provides stable support for the magnet. On the other hand, the yoke can better constrain the magnetic field of the magnet and improve the magnetic field effect between the magnet and the linear motor rotor.

[0018] In some embodiments, the yoke has four corners, and the corners are rounded or chamfered.

[0019] When the stator modules are spliced ​​together, the stator assembly can reduce the chances of the yokes of the stator modules colliding with or scratching each other by limiting the corners of the yokes to be rounded or chamfered, thereby improving the splicing yield.

[0020] In some embodiments, both sides of the magnetic yoke along the length direction protrude relatively from the two outermost magnets among the 2n magnets.

[0021] When the stator modules of the above-mentioned stator assembly are spliced ​​together along the length direction, by limiting the two outermost magnets protruding from both sides of the magnetic yoke, more magnets in the spliced ​​stator unit are still arranged at intervals, ensuring uniform distribution of the magnets, thereby ensuring uniform magnetic field of the stator assembly.

[0022] An embodiment of the present application also provides a linear motor, comprising a base, a stator assembly as described in any of the above technical solutions, a fastener and a mover assembly, wherein the stator assembly is arranged on the base, the fastener is sequentially passed through the avoidance groove and the assembly hole to be connected to the base, or the fastener is passed through the base to be connected to the assembly hole, the mover assembly is slidably arranged on the base and is correspondingly arranged with the stator assembly, and the mover assembly and the stator assembly generate an interacting magnetic field to make the mover assembly slide.

[0023] The above-mentioned linear motor, the stator assembly is provided with the above-mentioned stator module, and multiple stator modules can be spliced ​​in sequence to form a stator unit, and the length of the stator unit can be extended according to the size of the movable assembly to extend the length of the stator assembly or multiple rows of stator units can be provided to extend the width of the stator assembly. The length and width of the stator module are fixed, and can be spliced ​​and combined according to the length and width of the movable assembly to meet the requirements, reducing the number of materials of the stator assembly to one stator module material, reducing the number of materials and facilitating batch stocking. By designing one stator module material, the production of different tooling fixtures for the stator assembly of the linear motor is reduced. The movable assembly with the same pole slot scheme has and only needs to design one stator module, which is convenient for equipment production and further reduces labor costs. In addition, the way the stator assembly is installed on the base is different from the conventional installation method of mounting holes on both sides of the width. By opening avoidance grooves on both sides of the magnet, fasteners are passed through the assembly holes to connect to the base or through the base to connect to the assembly holes, and the fasteners are avoided through the avoidance grooves. The fasteners are installed in the middle of the stator assembly, which effectively narrows the space in the width direction of the stator assembly and facilitates the uninterrupted splicing of multiple rows of stator units in the width direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the stator assembly provided in the first embodiment of the present application.

[0025] Figure 2 yes Figure 1 A schematic plan view of the stator assembly is shown.

[0026] Figure 3 yes Figure 1 Schematic diagram of the structure of the stator module of the stator assembly shown.

[0027] Figure 4 It is a structural schematic diagram of the stator assembly provided in the second embodiment of the present application.

[0028] Figure 5 It is a structural schematic diagram of the stator assembly provided in the third embodiment of the present application.

[0029] Figure 6It is a structural schematic diagram of the stator module provided in the fourth embodiment of the present application.

[0030] Figure 7 It is a structural schematic diagram of the stator module provided in the fifth embodiment of the present application.

[0031] Figure 8 This is a schematic diagram of the decomposition of the linear motor provided in the sixth embodiment of the present application.

[0032] Figure 9 yes Figure 8 Schematic diagram of the structure of the stator module and fasteners of the linear motor shown.

[0033] Description of the main component symbols: linear motor 1, stator assembly 100, 200, 300, stator unit 10, stator modules 11, 21, 31, yoke 111, assembly hole 1111, corner 1112, magnet 112, avoidance groove 1121, base 400, fastener 500, mover assembly 600. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms 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 the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection, an electrical connection, or mutual communication; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0038] See Figure 1 The first embodiment of the present application provides a stator assembly 100, which is applied to a linear motor 1 (see Figure 8 As shown), wherein the linear motor 1 is a mover component 600 that can generate magnetic force through the magnetic effect of current and drive the linear motor 1 through the magnetic force (see Figure 8 The stator assembly 100 has a length direction, a width direction and a thickness direction. For ease of understanding and description, the embodiment of the present application defines the length direction, width direction and thickness direction of the stator assembly 100 as follows: Figure 1 It can be understood that the X-axis, Y-axis and Z-axis shown are not limitations of the embodiments of the present application.

[0039] Please refer to Figure 2 and Figure 3 The stator assembly 100 includes at least one row of stator units 10, each row of stator units 10 extending along the length direction. If the stator assembly 100 includes multiple rows of stator units 10, the multiple rows of stator units 10 are arranged along the width direction. In this embodiment, the stator assembly 100 includes three rows of stator units 10, which are spliced ​​and arranged along the width direction. Each row of stator units 10 includes multiple stator modules 11 spliced ​​in sequence along the length direction. Each stator module 11 includes a yoke 111 and 2n magnets 112, where n is an integer greater than or equal to 1, i.e., the number of magnets 112 can be 2, 4, 6, 8, 10, etc. 2n magnets 112 are arranged at intervals along the length direction on the yoke 111, that is, there is a gap between any two adjacent magnets 112, and the magnets 112 can be set on the yoke 111 by gluing. Each magnet 112 is provided with a avoidance groove 1121 on both sides along the length direction. The yoke 111 is provided with n assembly holes 1111, and the assembly holes 1111 are arranged between two opposing avoidance grooves 1121 of each two magnets 112, that is, each assembly hole 1111 corresponds to two magnets 112 and the two magnets 112 do not share the assembly hole 1111 with the other magnets 112. The assembly holes 1111 are used to align the stator assembly 100 with the base 400 of the linear motor 1 (see Figure 8 In this embodiment, each stator module 11 includes four magnets 112, and the yoke 111 has two assembly holes 1111. It is understood that when the stator modules 11 are spliced ​​along the length and width directions, the yokes 111 of adjacent stator modules 11 can be connected by gluing to improve the stability of the stator assembly 100.

[0040] In this way, the stator assembly 100 provided in the embodiment of the present application is provided with the above-mentioned stator module 11. Multiple stator modules 11 can be spliced ​​in sequence along the length direction to form a stator unit 10, and the length of the stator unit 10 can be extended according to the size of the mover assembly 600 of the linear motor 1 to extend the length of the stator assembly 100 or more rows of stator units 10 can be provided to extend the width of the stator assembly 100. The length and width of the stator module 11 are relatively fixed, and can be spliced ​​and combined according to the length and width of the mover assembly 600 of the linear motor 1 to meet the requirements. The material types of the stator assembly 100 are reduced to one stator module 11 material, which reduces the material types and facilitates batch stocking. By designing one stator module 11 material, the production of different tooling fixtures for making the stator assembly 100 of the linear motor 1 is reduced. The mover assembly 600 with the same pole slot scheme has and only needs to design one stator module 11, which is convenient for equipment production and further reduces labor costs. In addition, the stator assembly 100 is mounted on the base 400 of the linear motor 1 in a manner different from the conventional mounting hole mounting method on both sides of the width. By opening the avoidance groove 1121 on both sides of the magnet 112, the linear motor 1 is fastened by the fastener 500 (see Figure 8 As shown in the figure, the stator assembly 100 is connected to the base 400 of the linear motor 1 through the assembly hole 1111 or is connected to the assembly hole 1111 through the base 400 of the linear motor 1, and the fastener 500 of the linear motor 1 is avoided through the avoidance groove 1121. The fastener 500 of the linear motor 1 is installed in the middle of the stator assembly 100, which effectively narrows the space in the width direction of the stator assembly 100 and facilitates the uninterrupted splicing of multiple rows of stator units 10 in the width direction.

[0041] It is understandable that in other embodiments, the stator assembly 100 may further include more rows of stator units 10, and more rows of stator units 10 may be spliced ​​and arranged along the width direction. Each stator module 11 may further include fewer or more magnets 112, which is not specifically limited in the embodiments of the present application.

[0042] In this embodiment, the stator assembly 100 includes three rows of stator units 10. When the three rows of stator units 10 are arranged along the width direction, any two adjacent rows of stator units 10 are offset along the length direction, and the three rows of stator units 10 are sequentially offset. As the stator assembly 100 increases in width with the number of rows of stator units 10, the cogging force of the stator assembly 100 increases as the width of the magnets 112 increases, thereby affecting the motion performance of the linear motor 1. By staggering any two adjacent rows of stator units 10 along the length direction, the cogging force of the linear motor 1 is effectively reduced.

[0043] It can be understood that in other embodiments, when the stator assembly 100 includes more rows of stator units 10, any two adjacent rows of stator units 10 in the more rows of stator units 10 are staggered along the length direction and the more rows of stator units 10 are staggered in sequence.

[0044] In this embodiment, the offset distance L between the two outermost rows of stator units 10 in the three rows of stator units 10 along the length direction is less than the width of the magnets 112 along the length direction. The offset distance L between any two adjacent rows of stator units 10 along the length direction is L / 2. For example, the ratio of the offset distance L to the width of the magnets 112 can be 1 / 2, 1 / 3, 1 / 4, 1 / 5, 1 / 6, 1 / 7, 1 / 8, 1 / 9, 1 / 10, etc., and can be set according to actual conditions. Thus, by limiting the offset distance L between the two outermost rows of stator units 10 to be less than the width of the magnets 112, the magnetic field of the stator assembly 100 and its splicing in the width direction are prevented from being affected by the same magnetic poles of the two magnets 112 along the width direction, thereby reducing cogging forces while ensuring normal operation of the stator assembly 100.

[0045] It can be understood that in other embodiments, when the stator assembly 100 includes more rows of stator units 10, for example, the number of rows of stator units 10 is m, then the offset distance between any two adjacent rows of stator units 10 along the length direction is L / (m-1), which is not specifically limited in the embodiments of the present application.

[0046] In this embodiment, the yoke 111 further has four corners 1112, each of which is rounded or chamfered. In this embodiment, each corner 1112 is chamfered. Thus, when the stator modules 11 are spliced ​​together along the length or width direction, by limiting the corners 1112 of the yoke 111 to be rounded or chamfered, it is possible to reduce the chances of the yokes 111 of the stator modules 11 colliding with each other, thereby improving the splicing yield.

[0047] In this embodiment, the two sides of the yoke 111 along the length direction relatively protrude from the two outermost magnets 112 of the four magnets 112. It can also be understood that the projected area of ​​the four magnets 112 on the yoke 111 is smaller than the surface area of ​​the yoke 111, wherein the length of the magnet 112 along the width direction is the same as the width of the yoke 111 along the width direction, so that when multiple rows of stator units 10 are spliced ​​together, the magnets 112 adjacent to each other along the width direction can be spliced ​​together in sequence. In this way, when the stator module 11 is spliced ​​together along the length direction, by limiting the two sides of the yoke 111 to protrude from the two outermost magnets 112, more magnets 112 in the spliced ​​stator unit 10 are still spaced apart, ensuring a uniform distribution of the magnets 112, thereby ensuring a uniform magnetic field of the stator assembly 100. It can be understood that when the stator module 11 is spliced ​​together along the width direction, the magnets 112 in two adjacent rows are spliced ​​together in sequence.

[0048] In this embodiment, the thickness of the yoke 111 is greater than the thickness of the magnet 112. By limiting the thickness of the yoke 111 to be greater than the thickness of the magnet 112, the yoke 111 provides stable support for the magnet 112. Furthermore, the yoke 111 can better constrain the magnetic field of the magnet 112, thereby enhancing the magnetic field interaction between the magnet 112 and the rotor of the linear motor 1. The yoke 111 can be formed by stacking multiple layers of silicon steel sheets.

[0049] In this embodiment, the magnetic poles of any two adjacent magnets 112 in the stator module 11 are oppositely arranged. In this way, by setting the magnetic poles of any two adjacent magnets 112 to be oppositely arranged, the stator module 11 forms a continuously changing magnetic field, ensuring the normal use of the stator assembly 100.

[0050] In this embodiment, the avoidance groove 1121 can be C-shaped, and the assembly hole 1111 can be a through hole or a threaded hole. The projection of each magnet 112 on the yoke 111 does not overlap with the assembly hole 1111. Thus, by defining the avoidance groove 1121 as a C-shaped groove, the fastener 500 of the linear motor 1 can be avoided and hidden in the stator module 11, thereby reducing the thickness of the stator assembly 100. By defining the assembly hole 1111 as a threaded hole, the fastener 500 of the linear motor 1 can be connected to the base 400 of the linear motor 1 by sequentially passing through the avoidance groove 1121 and the assembly hole 1111, and can also be connected to the base 400 of the linear motor 1 by passing through the base 400 of the linear motor 1 and the assembly hole 1111, thereby expanding the connection methods between the stator assembly 100 and the base 400 of the linear motor 1.

[0051] It is understandable that in other embodiments, the avoidance groove 1121 may also be a C-shaped stepped groove, and the avoidance groove 1121 only needs to be able to hide the fastener 500 of the linear motor 1 .

[0052] It is understood that in other embodiments, the assembly hole 1111 may also be a through hole. In this way, the fastener 500 of the linear motor 1 sequentially passes through the avoidance groove 1121 and the assembly hole 1111 to connect with the base 400 of the linear motor 1, and the stator assembly 100 can still be fixedly connected to the base 400 of the linear motor 1.

[0053] See Figure 4The second embodiment of the present application provides a stator assembly 200. The structure of the stator assembly 200 provided in this embodiment is substantially similar to that of the stator assembly 100 provided in the first embodiment, except that, in this embodiment, the stator assembly 200 is designed to include a row of stator units 10 according to the width of the mover assembly 600 of the linear motor 1. The stator unit 10 includes a plurality of stator modules 11 sequentially spliced ​​along the length direction. Each stator module 11 includes a yoke 111 and four magnets 112 spaced apart on the yoke 111. The magnetic poles of two adjacent magnets 112 are arranged in opposite directions, and the four corners 1112 of the yoke 111 are chamfered.

[0054] See Figure 5 The third embodiment of the present application provides a stator assembly 300. The structure of the stator assembly 300 provided in this embodiment is roughly similar to that of the stator assembly 100 provided in the first embodiment. The difference is that in this embodiment, according to the width of the mover assembly 600 of the linear motor 1, the stator assembly 300 is designed to include four rows of stator units 10, each row of stator units 10 includes a plurality of stator modules 11 spliced ​​in sequence along the length direction, the four rows of stator units 10 are spliced ​​in sequence along the width direction, and any two adjacent rows of stator units 10 in the four rows of stator units 10 are staggered in the length direction, each stator module 11 includes a yoke 111 and four magnets 112 arranged at intervals on the yoke 111, the magnetic poles of two adjacent magnets 112 are arranged in opposite directions, and the four corners 1112 of the yoke 111 are chamfered.

[0055] See Figure 6 The fourth embodiment of the present application provides a stator module 21. The structure of the stator module 21 provided in this embodiment is roughly similar to that of the stator module 11 provided in the first embodiment. The difference is that, in this embodiment, according to the pole slot scheme of the mover assembly 600 of the linear motor 1, each stator module 21 is designed to include a yoke 111 and two magnets 112. The two magnets 112 are arranged at intervals on the yoke 111, and the magnetic poles of the two magnets 112 are arranged in opposite directions. The two sides of the yoke 111 along the length direction protrude from the two magnets 112 respectively. The four corners 1112 of the yoke 111 are all rounded, and the yoke 111 is provided with an assembly hole 1111.

[0056] See Figure 7The fifth embodiment of the present application provides a stator module 31. The structure of the stator module 31 provided in this embodiment is roughly similar to that of the stator module 11 provided in the first embodiment. The difference is that, in this embodiment, according to the pole slot scheme of the mover assembly 600 of the linear motor 1, each stator module 31 is designed to include a yoke 111 and six magnets 112. The six magnets 112 are arranged at intervals on the yoke 111, and the poles of any two adjacent magnets 112 are arranged in opposite directions. The two sides of the yoke 111 along the length direction protrude from the two outermost magnets 112 respectively. The four corners 1112 of the yoke 111 are all chamfered, and the yoke 111 is provided with three assembly holes 1111.

[0057] See Figure 8 and Figure 9 The sixth embodiment of the present application provides a linear motor 1. The linear motor 1 includes a base 400, a stator assembly 100, 200, 300 as described in any of the above embodiments, a fastener 500, and a mover assembly 600. The present application takes the stator assembly 100 described in the first embodiment as an example for explanation. In this embodiment, the stator assembly 100 is arranged on the base 400, and the number of fasteners 500 is multiple. The fasteners 500 are sequentially inserted into the avoidance groove 1121 and the assembly hole 1111 to connect with the base 400, and the fasteners 500 are hidden in the avoidance groove 1121, or the fasteners 500 are inserted into the base 400 to connect with the assembly hole 1111. The mover assembly 600 is slidably arranged on the base 400 and is correspondingly arranged with the stator assembly 100. The mover assembly 600 and the stator assembly 100 generate an interactive magnetic field to cause the mover assembly 600 to slide. Among them, the movable subassembly 600 can be slidably set on the base 400 through a slide rail slider structure or a ball slide rail slider structure. A coil can be set in the movable subassembly 600. The coil in the movable subassembly 600 generates a magnetic field after being energized. Under the interaction of the magnetic field of the movable subassembly 600 and the magnetic field generated by the magnet 112 of the stator assembly 100, the movable subassembly 600 can slide linearly according to the principle that like poles repel each other and opposite poles attract each other; the fastener 500 can be a screw.

[0058] In this way, the linear motor 1 provided in the embodiment of the present application, the stator assembly 100 of the linear motor 1 is provided with one stator module 11 material, and multiple stator modules 11 can be spliced ​​in sequence to form a stator unit 10, and the length of the stator unit 10 can be extended according to the size of the movable assembly 600 to extend the length of the stator assembly 100 or multiple rows of stator units 10 can be provided to extend the width of the stator assembly 100. The length and width of the stator module 11 are fixed, and can be spliced ​​and combined according to the length and width of the movable assembly 600 to meet the requirements, reducing the number of material types of the stator assembly 100 to one stator module 11 material, reducing the number of material types, and facilitating batch stocking. By designing one stator module 11 material, the production of different tooling fixtures for making the stator assembly 100 of the linear motor 1 is reduced, and the movable assembly 600 with the same pole slot scheme has and only needs to design one stator module 11, which is convenient for equipment production and further reduces labor costs. In addition, the way the stator assembly 100 is installed on the base 400 is different from the conventional way of installing the stator assembly 100 on both sides of the width by opening an avoidance groove 1121 on both sides of the magnet 112, and the fastener 500 is connected to the base 400 through the assembly hole 1111 or through the base 400 and the assembly hole 1111, and the fastener 500 is avoided by the avoidance groove 1121. The fastener 500 is installed in the middle of the stator assembly 100, which effectively narrows the space in the width direction of the stator assembly 100, and at the same time facilitates the uninterrupted splicing of multiple rows of stator units 10 in the width direction.

[0059] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and all variations that come within the meaning and range of equivalents of the claims are intended to be embraced herein.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A stator assembly, applied to a linear motor, wherein the stator assembly has a width direction and a length direction, and is characterized in that: The stator assembly includes at least one row of stator units, each row of the stator units extends along the length direction. When the stator assembly includes multiple rows of stator units, the multiple rows of stator units are arranged along the width direction. Each row of the stator units includes multiple stator modules spliced ​​in sequence along the length direction. Each stator module includes a yoke and 2n magnets, where n is an integer greater than or equal to 1. The 2n magnets are arranged on the yoke at intervals along the length direction. Each magnet is provided with avoidance grooves on both sides along the length direction. The yoke is provided with n assembly holes, and the assembly holes are provided between two opposing avoidance grooves of every two magnets.

2. The stator assembly according to claim 1, wherein When the stator assembly includes a plurality of rows of stator units and the plurality of rows of stator units are arranged along the width direction, any two adjacent rows of stator units are staggered along the length direction.

3. The stator assembly according to claim 2, wherein: The stator units of the two outermost rows among the multiple rows of stator units have a stator unit offset distance along the length direction that is smaller than the width of the magnet along the length direction.

4. The stator assembly according to claim 1, wherein: The magnetic poles of any two adjacent magnets in the stator module are arranged in opposite directions.

5. The stator assembly according to claim 1, wherein: The avoidance groove is a C-shaped through groove or a C-shaped stepped groove, and the projection of each magnet on the magnetic yoke does not overlap with the assembly hole.

6. The stator assembly according to claim 1, wherein: The assembly hole is a through hole or a threaded hole.

7. The stator assembly according to claim 1, wherein: The stator assembly further has a thickness direction, and a thickness of the yoke along the thickness direction is greater than a thickness of the magnet along the thickness direction.

8. The stator assembly according to claim 1, wherein: The magnetic yoke has four corners, and the corners are rounded or chamfered.

9. The stator assembly according to claim 1, wherein: Both sides of the yoke along the length direction relatively protrude from the two outermost magnets among the 2n magnets.

10. A linear motor, characterized in that: It includes a base, a stator assembly according to any one of claims 1 to 9, a fastener and a mover assembly, the stator assembly is arranged on the base, the fastener is sequentially passed through the avoidance groove and the assembly hole to be connected to the base, or the fastener is passed through the base to be connected to the assembly hole, the mover assembly is slidably arranged on the base and is correspondingly arranged with the stator assembly, and the mover assembly and the stator assembly generate an interactive magnetic field to make the mover assembly slide.

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