Linear motor stator structure and linear motor

Abstract

This invention provides a stator structure for a linear motor and a linear motor. The stator structure includes a magnetic plate, magnets, and spacers. Multiple magnets are spaced apart along the length of the magnetic plate, and the spacers are positioned between adjacent magnets. The magnetic plate has a limiting groove extending along its length and penetrating at least one end. The spacers are positioned within the limiting groove and detachably connected to the magnetic plate. The bottom of each magnet has a locking portion that can rotate within the limiting groove. The top of the limiting groove has an installation opening. When the locking portion is in a first rotational position, the magnet can disengage from the installation opening; when the locking portion is in a second rotational position, the magnet is positioned within the limiting groove. According to this linear motor stator structure, magnets can be easily installed or removed from any position, making operation simple and convenient, with high installation and maintenance efficiency, effectively reducing time costs.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a stator structure for a linear motor and a linear motor. Background Technology

[0002] A linear motor is a device that directly converts electrical energy into linear motion mechanical energy by expanding a closed magnetic field into an open magnetic field, without requiring any other transmission devices. Specifically, a linear motor servo system is a power device that converts electrical energy into linear motion mechanical energy. It eliminates the intermediate conversion link of a rotary motor, effectively overcoming many shortcomings of traditional conversion mechanisms such as large size, low precision, low efficiency, slow response, and high noise.

[0003] The stator of a linear motor primarily consists of magnets mounted on a magnetically conductive plate. Each magnet on the plate is spaced apart to prevent movement and ensure the magnets don't detach during motor operation. Currently, most linear motor stators are manufactured by gluing the magnets to the magnetic plate surface, forming a magnetic field loop between the magnets and the rotor. This gluing method requires specialized tooling for installation, which is cumbersome and complex, demanding high precision, and often fails to achieve the desired results. Furthermore, the adhesive requires high performance; it must cure without demagnetizing the magnets. Vibrations, high temperatures, and foreign matter present during motor operation must not affect the adhesive strength, resulting in significant costs and time associated with gluing magnets. Additionally, since the stator is composed of multiple magnets, the breakage of a single magnet frequently renders the entire stator unusable, impacting motor production efficiency.

[0004] A novel linear motor magnetic plate is provided in the related technology. The magnetic plate has magnetic slots for mounting the magnets of the linear motor. The magnetic slots extend along the X-axis and have multiple magnets. Adjacent magnets are separated by magnetic isolation plates at equal intervals. However, in this solution, the method of installing and removing the magnets is complicated, resulting in low efficiency and high time cost for the installation, replacement and maintenance of the magnets. Summary of the Invention

[0005] The main objective of this invention is to provide a linear motor stator structure and a linear motor that allows for easy installation or removal of magnets at any position, is simple and convenient to operate, has high installation and maintenance efficiency, and effectively reduces time costs.

[0006] To achieve the above objectives, according to one aspect of the present invention, a linear motor stator structure is provided, comprising a magnetic plate, magnets, and spacers. The number of magnets is multiple, and the multiple magnets are spaced apart along the length direction of the magnetic plate. The spacers are disposed between adjacent magnets and define the interval between two adjacent magnets.

[0007] The magnetic plate is provided with a limiting slot, which extends along the length of the magnetic plate and penetrates at least one end of the magnetic plate. The spacer is disposed in the limiting slot and is detachably connected to the magnetic plate.

[0008] The bottom of the magnet is provided with a locking part that can rotate within the limiting slot. The top of the limiting slot has an installation opening. When the locking part is in the first rotation position, the magnet can be disengaged from the installation opening. When the locking part is in the second rotation position, the magnet can be limited within the limiting slot.

[0009] Furthermore, the spacer block can rotate within the limiting slot. When the spacer block is in the first rotating position, it can disengage from the limiting slot. When the spacer block is in the second rotating position, it can be limited within the limiting slot.

[0010] Furthermore, the limiting slot also includes a bottom groove, and the spacer includes a limiting base plate and a spacer protrusion protruding from the limiting base plate. The spacer protrusion forms a gap between adjacent magnets. The length of the limiting base plate is greater than the width of the installation opening and less than the width of the bottom groove. The width of the limiting base plate is less than or equal to the width of the spacer protrusion.

[0011] Furthermore, when the spacer blocks space adjacent magnets, the spacer blocks have a first width in the width direction of the mounting opening, and the first width is less than or equal to the width of the mounting opening.

[0012] Furthermore, the spacer block is provided with screw holes, and the bottom of the limiting slot is provided with through holes corresponding to the installation opening area. The screw holes and through holes on the spacer block are provided one-to-one.

[0013] Furthermore, the snap-fit ​​part includes a connecting post and a stop plate. The connecting post is connected between the magnet and the stop plate. When the snap-fit ​​part is in the first rotational position, the dimension of the connecting post in the width direction of the mounting opening is the same as the width of the mounting opening. When the snap-fit ​​part is in the second rotational position, the dimension of the connecting post in the width direction of the mounting opening is less than or equal to the width of the mounting opening.

[0014] Furthermore, when the limiting slot also includes a bottom groove, when the locking part is in the first rotational position, the dimension of the stop plate in the width direction of the installation opening is the same as the width of the installation opening. When the locking part is in the second rotational position, the dimension of the stop plate in the width direction of the installation opening is greater than the width of the installation opening and less than the width of the bottom groove.

[0015] Furthermore, the length of the connecting column is the same as the thickness of the sidewalls on both sides of the installation opening.

[0016] Furthermore, the cross-section of the stop plate is elliptical; or, the cross-section of the stop plate is polygonal.

[0017] Furthermore, when the cross-section of the stop plate is polygonal, the stop plate includes a beveled edge, which is configured to reduce the side length of the stop plate at both ends of the magnet in the longitudinal direction.

[0018] Furthermore, the depth of the limiting slot is 1 / 4 to 1 / 3 of the thickness of the magnetic plate; and / or, the spacer block is made of a non-magnetic material.

[0019] Furthermore, the first end of the limiting slot passes through the magnetic plate, and the second end of the limiting slot is closed, or the second end of the limiting slot is provided with a blocking structure to prevent the magnet from sliding out of the limiting slot.

[0020] Furthermore, the magnet and the snap-fit ​​part are integrally formed; and / or, when the magnetic plate is provided with mounting holes on both sides of the limiting slot, and a through hole is provided in the area corresponding to the mounting opening at the bottom of the limiting slot, the magnetic plate is installed and positioned simultaneously through the mounting holes and the through hole.

[0021] According to another aspect of the present invention, a linear motor is provided, comprising a stator structure and a mover structure, wherein the stator structure is the linear motor stator structure described above.

[0022] According to the technical solution of this invention, the stator structure of a linear motor includes a magnetic plate, magnets, and spacers. Multiple magnets are spaced apart along the length of the magnetic plate. The spacers are positioned between adjacent magnets and define the interval between two adjacent magnets. The magnetic plate has a limiting groove extending along its length and penetrating at least one end. The spacers are positioned within the limiting groove and detachably connected to the magnetic plate. A locking portion is provided at the bottom of the magnet, allowing it to rotate within the limiting groove. The top of the limiting groove has an installation opening. When the locking portion is in a first rotating position, the magnet can disengage from the installation opening. When the locking portion is in a second rotating position, the magnet is positioned within the limiting groove. In this linear motor stator structure, a limiting slot is provided on the magnetic plate to install and fix the magnet using a snap-fit ​​positioning method. This eliminates the problems of high cost and unstable fixation associated with adhesive bonding. A snap-fit ​​part is provided at the bottom of the magnet, allowing the magnet to be installed or removed from the limiting slot by controlling the rotation of this part. Because this method achieves installation by rotating the snap-fit ​​part, it is not necessary to insert the magnet from one end of the magnetic plate; the magnet can be directly inserted into the limiting slot at the desired installation position. This simplifies the installation process and reduces the difficulty of installing the magnet, especially for longer magnetic plates, significantly reducing the weight of the magnet. The installation path length is shortened, reducing magnet installation time and improving efficiency. This effectively avoids potential damage during installation, ensuring installation quality. Furthermore, when individual magnets need replacement, it's unnecessary to remove all magnets from the damaged side. Simply adjust the magnets on both sides of the damaged magnet to create rotation space, allowing for easy removal. Then, intact magnets can be installed as before, and the rotation position and installation of other magnets can be adjusted. This allows for quick magnet replacement and repair, reducing maintenance costs and increasing efficiency. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 A three-dimensional structural schematic diagram of the linear motor stator structure according to an embodiment of the present invention is shown;

[0025] Figure 2 An exploded view of the stator structure of a linear motor according to an embodiment of the present invention is shown.

[0026] Figure 3 A schematic diagram of the magnetic plate structure of the linear motor stator structure according to an embodiment of the present invention is shown;

[0027] Figure 4 A bottom view of the magnetic plate of the linear motor stator structure according to an embodiment of the present invention is shown;

[0028] Figure 5 The diagram shows a right-side view of the magnetic plate of the linear motor stator structure according to an embodiment of the present invention.

[0029] Figure 6 A schematic diagram of the magnetic plate of the linear motor stator structure according to an embodiment of the present invention is shown in the left view.

[0030] Figure 7 A three-dimensional structural schematic diagram of the magnetic plate of the linear motor stator structure according to an embodiment of the present invention is shown;

[0031] Figure 8 A three-dimensional structural schematic diagram of the spacer block of the linear motor stator structure according to an embodiment of the present invention is shown;

[0032] Figure 9 A three-dimensional structural schematic diagram of the magnet in the stator structure of a linear motor according to an embodiment of the present invention is shown;

[0033] Figure 10 A schematic diagram of the magnet structure of the linear motor stator structure according to an embodiment of the present invention is shown;

[0034] Figure 11 A side view of the magnets in the stator structure of a linear motor according to an embodiment of the present invention is shown; and

[0035] Figure 12 A top view of the magnets in the stator structure of a linear motor according to an embodiment of the present invention is shown.

[0036] The above figures include the following reference numerals:

[0037] 1. Magnetic plate; 2. Magnet; 3. Spacer block; 4. Limiting slot; 5. Mounting opening; 6. Bottom groove; 7. Limiting base plate; 8. Spacer protrusion; 9. Screw hole; 10. Through hole; 11. Snap-fit ​​part; 12. Connecting post; 13. Stop plate; 14. Beveled edge; 15. Blocking structure; 16. Mounting hole. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] See Figures 1 to 12As shown, according to an embodiment of the present invention, the stator structure of the linear motor includes a magnetic plate 1, magnets 2 and spacers 3. There are multiple magnets 2, which are spaced apart along the length of the magnetic plate 1. The spacers 3 are disposed between adjacent magnets 2 and define the interval between two adjacent magnets 2.

[0040] The magnetic plate 1 is provided with a limiting slot 4, which extends along the length of the magnetic plate 1 and penetrates at least one end of the magnetic plate 1. The spacer block 3 is disposed in the limiting slot 4 and is detachably connected to the magnetic plate 1.

[0041] The bottom of the magnet 2 is provided with a snap-fit ​​part 11, which can rotate within the limiting slot 4. The top of the limiting slot 4 has an installation opening 5. When the snap-fit ​​part 11 is in the first rotation position, the magnet 2 can be disengaged from the installation opening 5. When the snap-fit ​​part 11 is in the second rotation position, the magnet 2 can be limited within the limiting slot 4.

[0042] In this linear motor stator structure, the magnet 2 can be installed and fixed by setting a limiting slot 4 on the magnetic plate 1 using snap-fit ​​positioning. This eliminates the problems of high cost and unstable fixation associated with adhesive bonding. A snap-fit ​​part 11 is provided at the bottom of the magnet 2, allowing the magnet 2 to be installed or removed from the limiting slot 4 by controlling the rotation position of the snap-fit ​​part 11. Since this method achieves the installation by rotating the snap-fit ​​part 11, it is not necessary to insert the magnet 2 from one end of the magnetic plate 1. The magnet 2 can be directly inserted into the limiting slot 4 of the magnetic plate 1 at the desired installation position, simplifying the installation process and reducing the installation difficulty, especially for longer magnetic plates 1, which can significantly reduce... The shorter installation path length of magnet 2 reduces installation time and improves installation efficiency, effectively preventing potential damage during installation and ensuring installation quality. Furthermore, when individual magnets 2 are damaged and need replacement, it's not necessary to remove all magnets 2 on the damaged side. Simply adjust the magnets 2 on both sides of the damaged magnet 2 to create rotation space, making it easy to remove the damaged magnet 2. Then, the intact magnet 2 can be installed in the same way, and the rotation position of the damaged magnet 2 can be adjusted. By repositioning the other magnets 2, replacement and repair can be quickly achieved, reducing both the cost and efficiency of magnet 2 replacement and maintenance.

[0043] This invention is mainly applied in the field of stators for linear motors. It redesigns the overall structure of the stator, the installation method of the magnets 2, and the overall structure of the magnet plate 1. The stator structure is optimized as a whole, and the magnet plate structure is designed as an integrated unit, reducing the difficulty of installing the magnets together. The spliced ​​magnet structure directly matches the magnet plate, saving the time of using glue to bond magnets in the market, reducing the risk of the entire magnet plate being scrapped due to damage to individual magnet plates, and increasing the versatility of the magnet plate.

[0044] The linear motor stator structure of the present invention consists of three parts: a magnetic plate 1, a magnet 2, and a spacer block 3. The magnet 2 and the spacer block 3 are both mounted on the magnetic plate 1 to form a complete stator structure.

[0045] In one embodiment, the spacer block 3 can rotate within the limiting slot 4. When the spacer block 3 is in the first rotation position, it can disengage from the limiting slot 4. When the spacer block 3 is in the second rotation position, it can be limited within the limiting slot 4.

[0046] In this embodiment, the spacer block 3 has a similar structure to the magnet 2 and can achieve the same function as the magnet 2. That is, it can lock and unlock with the limiting slot 4 by rotating. After the spacer block 3 adopts this structure, both the spacer block 3 and the magnet 2 can be installed, limited and disassembled by rotating. The structure is simpler and more convenient. Neither of them needs to slide out of the limiting slot 4 along the extension direction of the limiting slot 4. They can be installed or disassembled directly on the magnetic plate 1 near the required installation position. The two work together to further reduce the difficulty of installation and disassembly and improve the installation and replacement efficiency of the magnet 2 at any position.

[0047] In one embodiment, the limiting slot 4 further includes a bottom groove 6, and the spacer block 3 includes a limiting base plate 7 and a spacer protrusion 8 protruding from the limiting base plate 7. The spacer protrusion 8 forms a gap between adjacent magnets 2. The length of the limiting base plate 7 is greater than the width g of the mounting opening 5 and less than the width k of the bottom groove 6. The width of the limiting base plate 7 is less than or equal to the width of the spacer protrusion 8.

[0048] In this embodiment, the top surface of the spacer protrusion 8 is higher than the bottom surface of the magnet 2, and can be flush with the height of the magnet 2. By setting the spacer protrusion 8 and the limiting base plate 7, the spacer protrusion 8 can form an effective gap between adjacent magnets 2, and at the same time form a rotation limit for the magnet 2, so that the magnet 2 can be stably limited in the limiting slot 4 and cannot be dislodged from the limiting slot 4 by rotation. Since the spacer block 3 is detachably connected to the magnetic plate 1, it can form a fixed connection with the magnetic plate 1, thereby effectively limiting the installation position of the magnet 2. In this embodiment, the length and width of the limiting base plate 7 are limited, so that the limiting base plate 7 can achieve different functions in different rotation positions, thereby facilitating both the positioning of the spacer block 3 and the magnetic plate 1 and the quick removal of the spacer block 3 from the magnetic plate 1.

[0049] In one embodiment, when the spacer block 3 is used to space adjacent magnets 2, the spacer block 3 has a first width in the width direction of the mounting opening 5, the first width being less than or equal to the width g of the mounting opening 5.

[0050] In this embodiment, the width of the spacer block 3 is always less than the width g of the mounting opening 5 in any direction, and it does not have a structure to be engaged with the limiting slot 4. The spacer block 3 is directly installed and fixed to the bottom of the limiting slot 4, and there is no engaging relationship between the spacer block 3 and the limiting slot 4. Therefore, when installing and fixing the spacer block 3, it can be directly fixed to the magnetic plate 1 by screwing, without the need to adjust the rotation position of the spacer block 3. The structure is simpler and the operation is more convenient. When installing or removing the magnet 2, there is no need to rotate the spacer block 3. The bracket removes the spacer block 3 from the magnetic plate 1, leaving room for the magnet 2 to rotate, which allows for convenient installation or removal of the magnet 2. This further simplifies the operation steps, reduces the difficulty of operation, and improves the efficiency of operation.

[0051] In one embodiment, the spacer 3 is made of a non-magnetic material so as not to affect the magnetic circuit between the motor rotor and stator. The material of the spacer is, for example, plastic.

[0052] In one embodiment, the spacer block 3 is provided with screw holes 9, and the bottom of the limiting slot 4 is provided with through holes 10 corresponding to the area of ​​the mounting opening 5. The screw holes 9 and through holes 10 on the spacer block 3 are provided in a one-to-one correspondence.

[0053] In this embodiment, the spacer block 3 can be quickly and easily installed and fixed on the magnetic plate 1 by means of screw connection.

[0054] In this embodiment, the spacer block 3 has a T-shaped overall structure. The spacer block 3 is placed within the limiting slot 4 of the magnetic plate 1. The spacer protrusion 8 of the spacer block 3 is positioned on top, located at the mounting opening 5 of the limiting slot 4, while the limiting base plate 7 is positioned on the bottom, located within the bottom groove 6 of the limiting slot 4, forming a locking and limiting connection with the bottom groove 6. The front of the spacer block 3 has an inverted T-shaped structure. This inverted T-shape serves two purposes: firstly, it cooperates with the magnetic plate 1 for effective fixation; secondly, the spacer block 3 is placed between the two magnets 2 to prevent them from attracting each other. A screw hole 9 is located in the middle of the spacer protrusion 8 on the upper part of the spacer block 3. The screw hole 9 is a countersunk screw hole to prevent the screw head from protruding and obstructing the movement between the motor's mover and stator, thus affecting the magnetic circuit between the motor components. The screw hole 9 in the spacer block 3 is a through hole, allowing the screw to directly connect the spacer block 3, the magnetic plate 1, and other mechanical structures. The length of the long side of the limiting base plate 7 of the spacer block 3 is less than the width k of the bottom groove 6 of the magnetic plate 1, so that the spacer block 3 can rotate in the limiting slot 4 of the magnetic plate 1. The bottom corners on both sides of the spacer protrusion 8 of the spacer block 3 need to be cleared to prevent the spacer block 3 from being unable to be installed on the magnetic plate 1.

[0055] In one embodiment, the latching part 11 includes a connecting post 12 and a stop plate 13. The connecting post 12 is connected between the magnet 2 and the stop plate 13. When the latching part 11 is in the first rotational position, the dimension of the connecting post 12 in the width direction of the mounting opening 5 is the same as the width g of the mounting opening 5. When the latching part 11 is in the second rotational position, the dimension of the connecting post 12 in the width direction of the mounting opening 5 is less than or equal to the width g of the mounting opening 5.

[0056] When the limiting slot 4 also includes the bottom slot 6, when the locking part 11 is in the first rotational position, the dimension of the stop plate 13 in the width direction of the mounting opening 5 is the same as the width g of the mounting opening 5. When the locking part 11 is in the second rotational position, the dimension of the stop plate 13 in the width direction of the mounting opening 5 is greater than the width g of the mounting opening 5 and less than the width k of the bottom slot 6.

[0057] In this embodiment, the snap-fit ​​part 11 adopts a structure in which a connecting post 12 and a stop plate 13 cooperate. The connecting post 12 is a cylinder. The width of the stop plate 13 is the same as the diameter d of the connecting post 12. The length of the stop plate 13 is greater than the diameter d of the connecting post 12 and less than the width k of the bottom groove 6 of the limiting slot 4. The diameter of the connecting post 12 is the same as the width g of the mounting opening 5, so it can rotate within the mounting opening 5. The length of the stop plate 13 is less than the width k of the bottom groove 6 of the limiting slot 4, so it can rotate within the bottom groove 6 of the limiting slot 4. At the same time, since the length of the stop plate 13 is greater than the diameter of the connecting post 12, when the long side of the stop plate 13 is snapped into the bottom groove 6, it can be stopped within the bottom groove 6 and will not come out of the bottom groove 6, thus realizing the stopping and limiting of the stop plate 13 within the limiting slot 4.

[0058] In one embodiment, the length of the connecting post 12 is the same as the thickness of the sidewalls on both sides of the mounting opening 5.

[0059] In this embodiment, the length of the connecting post 12 is the same as the thickness of the side walls on both sides of the mounting opening 5. Therefore, when the stop plate 13 is inserted into the bottom groove 6, the length of the connecting post 12 is the same as the thickness of the top wall of the limiting groove 4, which allows the top wall of the limiting groove 4 to be inserted into the groove formed by the magnet 2 and the stop plate 13, without vertical displacement. Thus, the vertical displacement of the magnet 2 along the mounting opening 5 can be limited. Combined with the limiting of the magnet 2 along the extension direction of the limiting groove 4 formed by the spacer block 3, it can be ensured that each magnet 2 is stably and reliably fixed on the magnetic plate 1 without relative movement, thus ensuring the stability and reliability of the installation structure of the magnet 2 on the magnetic plate 1.

[0060] In one embodiment, the stop plate 13 has an elliptical cross-section, which allows it to have different dimensions in the length and width directions, so that the stop plate 13 can achieve different mating relationships with the limiting groove 4 when it is in different rotational positions.

[0061] In one embodiment, the stop plate 13 has a polygonal cross-section.

[0062] When the cross-section of the stop plate 13 is polygonal, the stop plate 13 includes a chamfered edge 14, which is configured to reduce the side length of the stop plate 13 at both ends of the magnet 2 in the longitudinal direction.

[0063] In this embodiment, the magnet 2 is entirely disposed on the upper surface of the magnetic plate 1, and is fixed to the magnetic plate 1 by the snap-fit ​​part 11 located below the magnet 2. Therefore, in this embodiment, the magnet 2 is entirely protruding on the magnetic plate 1, and there is no mating relationship between it and the magnetic plate 1. There is no need to process any grooves on the magnetic plate 1 that match the body structure of the magnet 2, which effectively simplifies the structure of the magnetic plate 1, reduces the processing steps of the magnetic plate 1, and can reduce the volume of the magnetic plate 1 while ensuring the structural strength of the magnetic plate 1, making the overall structure of the linear motor more compact and facilitating the miniaturization of the linear motor.

[0064] In one embodiment, the magnet 2 and the snap-fit ​​part 11 are integrally formed;

[0065] Unlike ordinary magnet structures, this embodiment uses the overall structure of magnet 2 as the upper part of the mounting assembly composed of magnet 2 and snap-fit ​​part 11, which is installed on the upper surface of magnetic plate 1. Snap-fit ​​part 11 serves as the lower part of the mounting assembly to achieve installation and fixation with magnetic plate 1. The biggest improvement of this embodiment compared to related technologies lies in the bottom design of magnet 2. Magnet 2 consists of three structural components: the top is a cuboid structure, similar to ordinary magnet structures; the middle part is a cylindrical structure with a smooth curved surface; and the bottom is a hexagonal structure. The upper cuboid structure is the main magnet structure, forming a complete magnetic circuit with the mover of the linear motor. The diameter of the middle cylindrical structure is the same as the width g of the mounting opening 5 of the limiting slot 4 of magnetic plate 1, allowing magnet 2 to rotate on magnetic plate 1. This rotation facilitates the installation of magnet 2. The lower structure of magnet 2 is hexagonal. The length dimension of the hexagonal structure is slightly smaller than the width k of the bottom groove 6 inside magnet 1, which facilitates the rotation of magnet 2 within magnet 1. The width dimension of the hexagonal structure is the same as the width g of the mounting opening 5 on the surface of magnet 1. The thickness dimension of the hexagonal structure is the same as the depth of the bottom groove 6 of magnet 1. The hexagonal structure has two inclined planes adjacent to the two sides at both ends of the length direction. The inclined planes mainly shorten the length of the two sides at both ends of the length direction of the hexagonal structure, thereby reducing the rotation radius required for the rotation of the hexagonal structure and assisting magnet 2 in rotating.

[0066] In one embodiment, the depth of the limiting slot 4 is 1 / 4 to 1 / 3 of the thickness of the magnetic plate 1. This ensures that the limiting slot 4 has sufficient depth to provide enough space for the installation and rotation of the magnet 2, while also avoiding the problem of insufficient structural strength of the magnetic plate 1 due to excessive depth of the limiting slot 4.

[0067] In one embodiment, the first end of the limiting slot 4 passes through the magnetic plate 1, and the second end of the limiting slot 4 is closed.

[0068] In one embodiment, the second end of the limiting slot 4 is provided with a blocking structure 15 to prevent the magnet 2 from sliding out of the limiting slot 4.

[0069] In this embodiment, the limiting slot 4 is only open on one side, while the other side is set as a completely closed structure, or it is set as a blockage formed by the blocking structure 15. In this structure, when installing the magnet 2, one side of the magnet 2 can be positioned by the blocking structure 15 or the closed structure, so that no additional positioning structure is needed, and the structural design can be simpler.

[0070] In one embodiment, the magnetic plate 1 has mounting holes 16 on both sides of the limiting slot 4, and a through hole 10 is provided at the bottom of the limiting slot 4 corresponding to the area of ​​the mounting opening 5. The magnetic plate 1 is then installed and positioned through both the mounting holes 16 and the through hole 10. The mounting holes 16 are, for example, screw holes.

[0071] Magnet 2 is mounted on magnet plate 1 to form stator structure. The stator structure needs to be fixed on the machine tool workbench or other workbench. Generally, magnet plate 1 is fixed by two rows of countersunk screw holes on the left and right, but it is easy to shift during installation. By adding a middle row of screws, three rows of screws can be used for fixing, which effectively avoids the shift of stator structure.

[0072] See also Figures 3 to 6 As shown, the magnetic plate 1 has a rectangular parallelepiped structure. In this embodiment, the length of the magnetic plate 1 can be continuously extended according to actual conditions. The attached figure only shows the front end of the overall structure for illustration and does not limit the actual length of the magnetic plate 1. When the magnetic plate 1 is placed on a plane, the structure with screw holes and limiting slots 4 is set on the top of the magnetic plate 1. There is a row of screw holes on both sides of the top of the magnetic plate 1. The main type of screw holes is countersunk screw holes, and the distance between each countersunk screw hole is fixed. The countersunk screw holes are mainly used to connect the magnetic plate 1 with other mechanical structures. The countersunk screw holes can prevent relative movement between the magnetic plate 1 and other mechanical structures. The advantage of the countersunk screw holes is that the screw head is hidden in the magnetic plate 1, which does not affect the overall surface of the magnetic plate. The overall structure of the magnetic plate 1 will still be a rectangular parallelepiped structure.

[0073] The upper surface of the magnetic plate 1 has a limiting groove 4 in the middle. The depth of the limiting groove 4 is one-third of the thickness h of the magnetic plate 1. The depth of the limiting groove 4 can be changed according to different models and design requirements. There is a row of threaded screw holes 9 in the middle of the bottom of the limiting groove 4. The diameter of the screw holes 9 in the limiting groove 4 is smaller than the diameter of the screw holes on both sides. The screw holes 9 in the limiting groove 4 are used to fix the spacer block 3 of the linear motor and also help to position the magnetic plate 1.

[0074] Viewed from the right side of the magnetic plate 1, the structure of the limiting slot 4 is narrow at the top and wide at the bottom, like an inverted T-shape. The purpose of the inverted T-shape structure is to achieve the mutual cooperation between the magnetic plate 1 and the magnet 2. The magnetic plate 1 can effectively limit the up and down movement of the magnet 2 through the inverted T-shape structure of the limiting slot 4. The inverted T-shape structure can make the contact area between the magnetic plate 1 and the spacer block 3 larger and the fixation more reliable. The inverted T-shape structure also locks the movement of the magnet 2, preventing the magnets of the linear motor from attracting each other.

[0075] Viewed from the left side of the magnetic plate 1, only a vertical limiting groove 4 is visible; the T-shaped pattern is not. The difference between the left and right sides is due to another purpose of the limiting groove 4 on the left: to restrict the movement of the magnet 2. Therefore, after the magnet 2 is placed in the magnetic plate 1, it is restricted in all four directions (up, down, left, and right), causing the magnet 2 to be fixed in a specific position. The back of the magnetic plate 1 consists of three rows of screw holes. These three rows of holes effectively fix the position of the magnetic plate 1, making its installation more convenient and efficient.

[0076] The installation process of the linear motor stator structure in this embodiment is as follows:

[0077] First, insert screws into the screw holes on both sides of the magnetic plate 1, and use screws to fix the screw holes of the magnetic plate 1 to the screw holes of the worktable. Fix the entire magnetic plate 1 according to the actual length of the worktable. Next, locate one side of the vertical groove in the magnetic plate 1 and begin installing the magnet 2 on that side. Then, align the length direction of the magnet 2 with the length direction of the magnetic plate 1, and insert the magnet 2 through the installation opening 5 into the limiting slot 4 of the magnetic plate 1. Rotate the magnet 2 90 degrees, and the hexagonal structure at the bottom of the magnet 2 will lock into the limiting slot 4 of the magnetic plate 1. Next, insert the spacer block 3 into the limiting slot 4 of the magnetic plate 1 in the same way, and select appropriate screws to lock the spacer block 3, the magnetic plate 1, and other mechanical structures. Finally, complete the installation of the linear motor stator structure according to the above installation steps to achieve the actual length.

[0078] The length of the magnetic plate 1 can be changed, and the width of the magnetic plate 1 can be adjusted according to different motor actuators, which facilitates serialized production.

[0079] The width of spacer block 3 can be adjusted, and stators of different widths can be designed according to different pole pitches, enhancing the versatility of the motor.

[0080] The angle of the beveled edge 14 of the hexagonal structure at the bottom of magnet 2 can be adjusted. It can be designed as a slanted pole structure according to user needs, increasing the versatility of magnet 2.

[0081] According to an embodiment of the present invention, the linear motor includes a stator structure and a mover structure, wherein the stator structure is the linear motor stator structure described above.

[0082] The linear motor stator structure of this invention has the following beneficial effects:

[0083] 1. The linear motor stator structure adopts an integral structure. The linear motor is directly fixed to the worktable by three rows of screws. By using the method of positioning the magnetic plate first and then installing the magnet, the time for adjusting the stator gap and repeatedly tightening the screws can be saved.

[0084] 2. The modularization of linear motor magnets allows for quick replacement of individual damaged magnets, improving production efficiency. Meanwhile, the remaining undamaged magnets can be reused, avoiding the scrapping of an entire magnetic plate due to a single magnet, thus saving time and material costs.

[0085] 3. The stator of the linear motor uses a combination of magnets and magnetic plates, with a snap-fit ​​structure and spacers to fix the magnets. This simple process effectively fixes the position of the magnets and avoids demagnetization due to high temperatures, thus improving the reliability of the motor.

[0086] 4. When installing the stator of a linear motor, the magnet installation can be placed as the last step to minimize the impact of the magnetic field on the operator.

[0087] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A linear motor stator structure, characterized by, The magnetic plate (1), the magnetic steel (2) and the spacer block (3), the magnetic steel (2) is multiple, multiple magnetic steel (2) is arranged along the length direction of the magnetic plate (1) interval, the spacer block (3) is arranged between adjacent magnetic steel (2), and the interval between the two adjacent magnetic steel (2) is defined; The magnetic plate (1) is provided with a limiting slot (4), the limiting slot (4) extends along the length direction of the magnetic plate (1), and at least penetrates one end of the magnetic plate (1), the spacer block (3) is arranged in the limiting slot (4), and is detachably connected between the magnetic plate (1); The bottom of the magnetic steel (2) is provided with a clamping part (11), the clamping part (11) can rotate in the limiting slot (4), the top of the limiting slot (4) has a mounting opening (5), when the clamping part (11) is in the first rotating position, the magnetic steel (2) can be pulled out from the mounting opening (5), when the clamping part (11) is in the second rotating position, the magnetic steel (2) can be limited in the limiting slot (4).

2. The linear motor stator structure of claim 1, wherein The spacer block (3) can rotate in the limiting slot (4), when the spacer block (3) is in the first rotating position, the spacer block (3) can be pulled out from the limiting slot (4), when the spacer block (3) is in the second rotating position, the spacer block (3) can be limited in the limiting slot (4).

3. The linear motor stator structure of claim 2, wherein The limiting slot (4) further comprises a bottom groove (6), the spacer block (3) comprises a limiting bottom plate (7) and a spacing protrusion (8) protruding on the limiting bottom plate (7), the spacing protrusion (8) forms spacing between adjacent magnetic steel (2), the length of the limiting bottom plate (7) is greater than the width of the mounting opening (5) and less than the width of the bottom groove (6), the width of the limiting bottom plate (7) is less than or equal to the width of the spacing protrusion (8).

4. The linear motor stator structure of claim 1, wherein When the spacer block (3) is used to space the adjacent magnetic steel (2), the spacer block (3) has a first width in the width direction of the mounting opening (5), and the first width is less than or equal to the width of the mounting opening (5).

5. The linear motor stator structure of claim 1, wherein The spacer block (3) is provided with a screw hole (9), the bottom of the limiting slot (4) is provided with a through hole (10) corresponding to the area of the mounting opening (5), and the screw hole (9) on the spacer block (3) is one-to-one corresponding with the through hole (10).

6. The linear motor stator structure according to any one of claims 1 to 5, characterized by The clamping part (11) comprises a connecting column (12) and a stop plate (13), the connecting column (12) is connected between the magnetic steel (2) and the stop plate (13), when the clamping part (11) is in the first rotating position, the size of the connecting column (12) in the width direction of the mounting opening (5) is the same as the width of the mounting opening (5), when the clamping part (11) is in the second rotating position, the size of the connecting column (12) in the width direction of the mounting opening (5) is less than or equal to the width of the mounting opening (5).

7. The linear motor stator structure of claim 6, wherein When the limiting clamping groove (4) further comprises a bottom groove (6), the size of the stop plate (13) in the width direction of the mounting opening (5) is the same as the width of the mounting opening (5) when the clamping part (11) is in the first rotating position, and the size of the stop plate (13) in the width direction of the mounting opening (5) is greater than the width of the mounting opening (5) and less than the width of the bottom groove (6) when the clamping part (11) is in the second rotating position.

8. The linear motor stator structure of claim 6, wherein The length of the connecting column (12) is the same as the thickness of the side wall on both sides of the mounting opening (5).

9. The linear motor stator structure of claim 7, wherein The cross section of the stop plate (13) is oval; or, the cross section of the stop plate (13) is polygonal.

10. The linear motor stator structure of claim 9, wherein When the cross section of the stop plate (13) is polygonal, the stop plate (13) comprises a bevel edge (14) configured to reduce the length of the side edge of the stop plate (13) at both ends in the length direction of the magnetic steel (2).

11. The linear motor stator structure according to any one of claims 1 to 5, characterized by The depth of the limiting clamping groove (4) is 1 / 4-1 / 3 of the thickness of the magnetic plate (1); and / or, the spacing block (3) is made of a non-magnetic material.

12. The linear motor stator structure according to any one of claims 1 to 5, characterized by The first end of the limiting clamping groove (4) penetrates the magnetic plate (1), and the second end of the limiting clamping groove (4) is closed, or the second end of the limiting clamping groove (4) is provided with a blocking structure (15) for blocking the magnetic steel (2) from sliding out of the limiting clamping groove (4).

13. The linear motor stator structure according to any one of claims 1 to 5, characterized by The magnetic steel (2) and the clamping part (11) are integrally formed; and / or, the magnetic plate (1) is provided with mounting holes (16) on both sides of the limiting clamping groove (4), and when the bottom of the limiting clamping groove (4) is provided with a through hole (10) corresponding to the area of the mounting opening (5), the magnetic plate (1) is installed and positioned through the mounting holes (16) and the through hole (10) at the same time.

14. A linear motor comprising a stator structure and a mover structure, characterized in that, The stator structure is the linear motor stator structure of any one of claims 1-13.

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