Linear motor module with integrated structure function

Abstract

The utility model discloses a linear motor module integrating structure functions. The linear motor module comprises a stator and a rotor which is cooperatively connected to one side of the stator. The stator comprises back iron and a plurality of permanent magnets arranged on one side of the back iron, and linear guide rails are symmetrically arranged at the two ends of one side of the back iron. A rotor mounting block is arranged on one side of the rotor, the rotor mounting block is movably connected to one side of the linear guide rail, and the rotor is arranged on one side of the permanent magnet; the linear guide rail is directly installed on the back iron, the back iron has a magnetic circuit closing function and a structure bearing function at the same time, an independent installation substrate does not need to be additionally arranged on the stator side, multi-component alignment is not needed, and assembling procedures are reduced.

Description

Technical Field

[0001] This utility model relates to the field of linear motor technology, and more specifically, to a linear motor module with integrated structure and function. Background Technology

[0002] Linear motors, as a special type of motor that directly converts electrical energy into linear motion mechanical energy, have become widely used in various industrial fields such as CNC machine tools, automated production equipment, and 3D printing equipment due to their core advantages of having no intermediate transmission links, fast response speed, and high transmission efficiency. They have become a core component for achieving precise linear motion in modern automated equipment. In particular, the application demand for linear motors is increasing in low-cost automated equipment and FDM 3D printers. However, these scenarios have relatively relaxed requirements for motion accuracy, focusing more on the cost-effectiveness and practicality of the equipment.

[0003] In existing technologies, linear motor designs are mostly geared towards high-precision, high-thrust applications, such as CNC machine tools and precision instruments. Their back iron materials are generally high-permeability silicon steel sheets (including non-oriented silicon steel sheets). These materials have high magnetic permeability and low iron loss, meeting the magnetic field performance requirements of high-precision applications, but their material cost is high. Furthermore, to meet the demands of high-precision motion, the back iron, its mounting base, and connectors all require precision machining, further increasing the overall cost of the equipment. This is incompatible with the needs of low-cost automated equipment and 3D printing equipment. Summary of the Invention

[0004] To solve at least one of the above-mentioned technical problems, this utility model proposes a linear motor module with integrated structural functions.

[0005] The first aspect of this utility model provides a linear motor module with integrated structural functions, including: a stator and a mover connected to one side of the stator;

[0006] The stator includes a back iron and a plurality of permanent magnets disposed on one side of the back iron, and linear guides are symmetrically arranged at both ends of the back iron side.

[0007] A moving part mounting block is provided on one side of the moving part, and the moving part mounting block is movably connected to one side of the linear guide rail. The moving part is located on the side of the permanent magnet.

[0008] In a preferred embodiment of this utility model, the permanent magnet is installed on the inner side of two linear guide rails, and multiple permanent magnets are spaced apart along the length direction of the back iron.

[0009] In a preferred embodiment of this utility model, multiple through holes are provided at positions corresponding to the back iron and the linear guide rail.

[0010] In a preferred embodiment of the present invention, a guide rail slider is further included, the guide rail slider being slidably connected to a linear guide rail, and the moving part mounting block being fixedly mounted on the guide rail slider.

[0011] In a preferred embodiment of this invention, a gap is provided between the mover and the permanent magnet.

[0012] In a preferred embodiment of this utility model, grooves are symmetrically provided on both sides of the back iron in the width direction, and the linear guide rail is fixedly installed in the grooves.

[0013] In a preferred embodiment of this utility model, the groove depth is 0-3mm.

[0014] In a preferred embodiment of this utility model, the back iron is formed by processing a single piece of metal plate.

[0015] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0016] (1) The structure is greatly simplified:

[0017] The linear guide is directly mounted on the back iron, which simultaneously undertakes the functions of magnetic circuit closure and structural support, eliminating the need for an additional independent mounting base on the stator side.

[0018] (2) The number of parts has decreased:

[0019] By integrating the structural functions into the back iron, separate stator mounting base plates, frame connectors, and other parts are eliminated, reducing the number of parts by 2-4 and eliminating the corresponding assembly process.

[0020] (3) Reduced assembly difficulty:

[0021] No need for multiple parts alignment, reducing assembly steps.

[0022] (5) Cost reduction:

[0023] By downgrading the materials, the cross-sectional size of the back iron is enlarged, so that even if a material with low permeability (such as Q235 carbon steel) is used in its magnetic circuit region, it can still provide sufficient magnetic flux, thus avoiding the use of high-cost silicon steel sheets.

[0024] (6) Suitable for low-cost scenarios:

[0025] In industries such as 3D printers and simple automated equipment where motion precision requirements are not high (positioning accuracy of ±0.1mm is usually sufficient), linear motion functions can be achieved at a lower cost, significantly enhancing the product's market competitiveness. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, some of the drawings in the following description are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the linear motor module structure according to an embodiment of the present invention;

[0028] Figure 2 This is a side view of the linear motor module according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the permanent magnet installation in an embodiment of this utility model.

[0030] In the diagram, 1 is the back iron, 2 is the permanent magnet, 3 is the linear guide, 4 is the through hole, 5 is the guide slider, 6 is the mover mounting block, and 7 is the mover. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0033] Example 1

[0034] See Figures 1-3 As shown, this utility model proposes an integrated structural and functional linear motor module, including: a stator and a mover 7 connected to one side of the stator;

[0035] The stator includes a back iron 1 and multiple permanent magnets 2 disposed on one side of the back iron 1. Linear guide rails 3 are symmetrically arranged at both ends of one side of the back iron 1.

[0036] A moving part 7 is provided with a moving part mounting block 6 on one side. The moving part mounting block 6 is movably connected to one side of the linear guide rail 3. The moving part 7 is provided on one side of the permanent magnet 2.

[0037] According to an embodiment of the present invention, permanent magnets 2 are installed on the inner side of two linear guide rails 3, and multiple permanent magnets 2 are spaced apart along the length direction of the back iron 1.

[0038] According to the embodiment of this utility model, multiple through holes 4 are provided at positions corresponding to the back iron 1 and the linear guide rail 3.

[0039] According to an embodiment of the present invention, it also includes a guide rail slider 5, which is slidably connected to the linear guide rail 3, and a mover mounting block 6 is fixedly mounted on the guide rail slider 5.

[0040] According to an embodiment of the present invention, a gap is provided between the mover 7 and the permanent magnet 2.

[0041] According to an embodiment of the present invention, grooves are symmetrically provided on both sides of the back iron in the width direction, and the linear guide rail 3 is fixedly installed in the grooves.

[0042] According to an embodiment of this utility model, the groove depth is 0-3mm, preferably 1mm.

[0043] According to an embodiment of the present invention, the back iron 1 is formed by processing a single piece of metal plate.

[0044] In summary, the above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0045] (1) The structure is greatly simplified:

[0046] The linear guide 3 is directly mounted on the back iron 1. The back iron 1 simultaneously undertakes the functions of magnetic circuit closure and structural support, and no additional independent mounting base plate is required on the stator side.

[0047] (2) The number of parts has decreased:

[0048] By integrating the structural functions into the back iron 1, separate stator mounting base plates, frame connectors, and other parts are eliminated, reducing the number of parts by 2-4 and eliminating the corresponding assembly process.

[0049] (3) Reduced assembly difficulty:

[0050] No need for multiple parts alignment, reducing assembly steps.

[0051] (5) Cost reduction:

[0052] By downgrading the materials, the cross-sectional size of the back iron 1 is enlarged, so that even if a material with low permeability (such as Q235 carbon steel) is used in its magnetic circuit region, it can still provide sufficient magnetic flux, thus avoiding the use of high-cost silicon steel sheets.

[0053] (6) Suitable for low-cost scenarios:

[0054] In industries such as 3D printers and simple automated equipment where motion precision requirements are not high (positioning accuracy of ±0.1mm is usually sufficient), linear motion functions can be achieved at a lower cost, significantly enhancing the product's market competitiveness.

[0055] Example 2: Linear motor module applied to 3D printers.

[0056] This embodiment uses a linear motor module for an FDM 3D printer as an example to illustrate the implementation of this utility model. In this embodiment, the mover 7 (coil winding side) moves, while the stator (permanent magnet 2 + back iron 1 side) is fixed. The back iron 1, after being enlarged, directly serves as the support structure for the x-axis of the 3D printer.

[0057] 1. Structural parameters

[0058] Mover 7: The primary (coil winding side) of a standard three-phase linear motor is 90mm long and 50mm wide. As a moving part, it directly drives the print head.

[0059] Stator: Fixed installation, made of Q235 carbon steel integral casting of enlarged back iron 1, length 350mm, width 80mm (structural area), permanent magnet 2 is attached to the surface, directly fixed to the printer frame.

[0060] The magnetic circuit area of ​​the back iron 1 is 40mm wide and 8mm thick, the same width as the mover 7, and a permanent magnet 2 is attached to its surface. The structural area of ​​the back iron 1 is enlarged to 80mm wide and 15mm thick, with a T-shaped cross-section, and frame mounting holes and load connection parts are provided along its length.

[0061] Permanent Magnet 2: N35 neodymium iron boron magnets, 20mm×10mm×5mm in size, are attached to the surface of the magnetic circuit area in alternating N and S polarities.

[0062] Load connection section: Four M4 threaded holes are provided at the top of the structural area for direct connection to the heated bed platform of the 3D printer.

[0063] 2. The static permanent magnet 2 is fixed to the surface of the magnetic circuit area by adhesive. The load connection part is directly integrated into the structural area. The stator as a whole is fixed to the printer frame through the structural area.

[0064] 3. Dynamic Relationship: When the coil of the mover 7 is energized, it generates a traveling wave magnetic field, which interacts with the magnetic field of the permanent magnet 2 on the stator, driving the mover 7 to move linearly along the length of the stator.

[0065] 4. Performance Verification: The comparison results between the linear motor module using the solution in this embodiment and the traditional "back iron 1 + independent aluminum alloy substrate" solution are as follows:

[0066]

[0067] Experimental results show that the present invention significantly reduces material costs, number of parts, and assembly costs while sacrificing some accuracy (still meeting the ±0.1mm requirement of 3D printers), making it very suitable for low-cost automated equipment with low accuracy requirements.

[0068] Back iron (Yoke): A magnetically conductive component in a linear motor used to form a closed magnetic circuit, usually located on the back of a permanent magnet.

[0069] Primary / Forcer: The primary part of a linear motor, which typically contains coil windings and is the moving part.

[0070] Stator (Secondary / Stator): The secondary part of a linear motor, which typically contains permanent magnets and a back iron, and is a stationary component.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to the above embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0073] 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 variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A linear motor module with integrated structural functions, comprising: A stator and a mover connected to one side of the stator; characterized in that, The stator includes a back iron and a plurality of permanent magnets disposed on one side of the back iron, and linear guides are symmetrically arranged at both ends of the back iron side. A moving part mounting block is provided on one side of the moving part, and the moving part mounting block is movably connected to one side of the linear guide rail. The moving part is located on one side of the permanent magnet. The permanent magnets are installed on the inner side of the two linear guide rails, and multiple permanent magnets are spaced apart along the length of the back iron. The back iron and the linear guide rail are provided with multiple through holes at the corresponding positions. It also includes a guide rail slider, which is slidably connected to a linear guide rail, and the moving part mounting block is fixedly mounted on the guide rail slider; The back iron is formed from a single piece of metal.

2. The linear motor module with integrated structure and function according to claim 1, characterized in that, A gap is provided between the mover and the permanent magnet.

3. The linear motor module with integrated structure and function according to claim 1, characterized in that, The back iron has symmetrical grooves on both sides in the width direction, and the linear guide rail is fixedly installed in the grooves.

4. A linear motor module with integrated structure and function according to claim 3, characterized in that, The groove depth is 0-3mm.

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