Single-sided coreless linear motor and linear motor module

Abstract

The application relates to the field of linear motors, and provides a single-side coreless linear motor and a linear motor module. The linear motor comprises a stator assembly and a mover assembly which are oppositely arranged along the height direction of the motor. The stator assembly comprises magnetic steel sheets and a magnetic yoke, and the multiple magnetic steel sheets are uniformly fixed to the top surface of the magnetic yoke. The mover assembly comprises a coil holder, a coil and a magnetic pole plate. The coil is embedded in the coil holder, the magnetic pole plate is clamped on the stepped clamping groove of the coil holder, the bottom surface of the coil holder close to the coil is arranged adjacent to the magnetic steel sheets, and a non-contact gap is formed between the surface of the coil and the magnetic steel sheets. On the basis of the coreless design of the motor, the motor structure is further optimized, the layout of the coil and the permanent magnet is adjusted, the motor structure of the ultrathin single-side design is realized, the volume and the mass of the motor are reduced, the installation and the maintenance of the motor are simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This application relates to the field of linear motor technology, and in particular to a single-sided coreless linear motor and a linear motor module. Background Technology

[0002] With advancements in technology and increasing levels of industrial automation, the market demand for high-performance, high-precision, lightweight, and compact linear motion solutions is growing. Especially in fields such as semiconductor manufacturing, precision machine tools, medical equipment, and aerospace, the requirements for motors go beyond simply providing power; they also demand higher positioning accuracy, faster speed response, and better stability and reliability. While traditional iron-core linear motors can provide significant thrust, they also suffer from the following problems:

[0003] The magnetic reluctance and eddy current losses caused by the iron core lead to reduced motor efficiency and severe heat generation; the large size and weight make it difficult to meet the requirements of applications with strict space and weight constraints; the response speed is limited because the large inertia of the iron core restricts the dynamic response performance of the motor; the positioning accuracy is limited because the hysteresis and cogging effects of the iron core affect the positioning accuracy of the motor.

[0004] Therefore, traditional iron-core linear motors have at least the following problems: thrust fluctuation, lateral force, large size, and heavy weight. Utility Model Content

[0005] The purpose of this application is to provide a single-sided coreless linear motor and a linear motor module to improve the above-mentioned problems in the prior art.

[0006] For the purposes mentioned above, this application provides the following technical solution:

[0007] The first aspect of this application provides a single-sided coreless linear motor, the linear motor including a stator assembly and a mover assembly disposed opposite to each other along the height direction of the motor, including:

[0008] A stator assembly includes magnets and a yoke, wherein a plurality of the magnets are fixed at even intervals to the top surface of the yoke;

[0009] The moving part assembly includes a coil frame, a coil, and a magnetic pole plate. The coil frame has stepped through holes, and the upper and lower holes of the stepped through holes respectively form a first cavity and a second cavity of the coil frame. The magnetic pole plate is installed inside the first cavity, and the coil is installed inside the second cavity. The side of the coil frame near the coil is adjacent to the magnetic steel sheet, and there is a non-contact gap between the surface of the coil and the magnetic steel sheet.

[0010] Furthermore, the mover assembly also includes a lead-out mover, which is fixedly connected to the coil frame through a mounting hole located on the side wall of the coil frame, and one end of the lead-out mover extends to the outside of the coil frame.

[0011] Furthermore, the second cavity is also provided with a side groove for wiring the coil.

[0012] Furthermore, the plurality of coils are uniformly arranged along the length or width direction of the second cavity.

[0013] Furthermore, multiple magnetic steel sheets are uniformly arranged along the length or width direction of the magnetic yoke.

[0014] Furthermore, the cross-section of the coil frame has the same shape as the cross-section of the magnetic yoke.

[0015] Furthermore, the cross-section of the first cavity is rectangular, and each of the four corners of the first cavity is provided with a clearance groove, which communicates with the stepped through hole.

[0016] Furthermore, the height of the linear motor perpendicular to the direction of the magnetic pole plate is less than 20mm.

[0017] Furthermore, the magnetic steel sheet is a neodymium iron boron permanent magnet.

[0018] The second aspect of this application provides a linear motor module, including a base and a sliding component. The linear motor module is fixedly connected to the linear motor described in the first aspect of this application, wherein the stator assembly of the linear motor is fixedly connected to the base, and the mover assembly of the linear motor is fixedly connected to the sliding component.

[0019] The single-sided coreless linear motor described above in this application can achieve at least the following technical effects:

[0020] This application provides a coreless linear motor. Based on the coreless design, the motor structure is further optimized and the layout of the coil and permanent magnet is adjusted to achieve an ultra-thin single-sided motor structure, which is suitable for space-constrained scenarios. This simplifies the installation and maintenance of the motor and reduces manufacturing costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the overall structure of a single-sided coreless linear motor provided in this application embodiment;

[0023] Figure 2 A front view of a single-sided coreless linear motor provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of the moving part component provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the coil frame structure provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the coil structure provided in an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the stator assembly structure provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the outgoing line mover structure provided in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of a linear motor module structure provided in an embodiment of this application;

[0030] Reference numerals: 1. Mover assembly; 11. Coil frame; 12. Coil; 13. Magnetic pole plate; 14. Stepped through hole; 15. Clearance groove; 16. Side groove; 2. Stator assembly; 21. Magnetic yoke; 22. Magnet sheet; 3. Lead-out mover; 4. Single-sided coreless linear motor; 5. Sliding component; 6. Base. Detailed Implementation

[0031] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] This application embodiment provides a single-sided coreless linear motor 4. Based on the coreless design, the motor structure is further optimized by adjusting the layout of the coil 12 and the permanent magnet, achieving an ultra-thin single-sided motor structure. According to Figure 1 and Figure 2 As shown, this embodiment provides a single-sided coreless linear motor 4, including a stator assembly 2 and a mover assembly 1 arranged opposite to each other along the height direction of the motor, specifically including:

[0033] Stator assembly 2 includes magnets 22 and a yoke 21. A plurality of magnets 22 are evenly spaced and fixed to the top surface of the yoke 21. The magnets 22 are evenly distributed along the length or width of the yoke 21. A schematic diagram of the stator assembly 2 is shown below. Figure 6 As shown;

[0034] The mover assembly 1 includes a coil frame 11, a coil 12, and a magnetic pole plate 13. The coil frame 11 has stepped through holes 14. The upper and lower holes of the stepped through holes 14 respectively form a first cavity and a second cavity of the coil frame 11. The magnetic pole plate 13 is installed inside the first cavity, and the coil 12 is installed inside the second cavity. The side of the coil frame 11 closest to the coil 12 is adjacent to the magnetic steel sheet 22. There is a non-contact gap between the surface of the coil 12 and the magnetic steel sheet 22. A schematic diagram of the mover assembly 1 is shown below. Figure 3 As shown, the structural schematic diagram of the coil frame 11 is as follows: Figure 4 As shown.

[0035] Specifically, the magnetic pole plate 13 is snapped and fixed to the upper hole of the stepped through hole 14, and forms a second cavity with the side wall of the coil frame 11. The coil 12 is embedded in the second cavity, which improves the space utilization of the mover assembly 1 and optimizes the motor structure.

[0036] Furthermore, the cross-section of the coil frame 11 has the same shape as the cross-section of the magnetic yoke 21, and both are preferably rectangular.

[0037] Furthermore, a plurality of the coils 12 are uniformly arranged along the length or width direction of the second cavity, and the structural schematic diagram of the coils 12 is shown below. Figure 5 As shown.

[0038] Specifically, by embedding the coil 12 into the coil frame 11 and arranging the magnet 22 on one side of the magnetic yoke 21, the stator assembly 2 and the mover assembly 1 are arranged opposite each other along the height direction of the motor and have the same cross-sectional shape, thereby reducing the size of the linear motor, realizing an ultra-thin design, and improving the space utilization of the motor.

[0039] Furthermore, the mover assembly 1 also includes a lead-out mover 3, which is fixedly connected to the coil frame 11 through a mounting hole located on the side wall of the coil frame 11, and one end of the lead-out mover 3 extends to the outside of the coil frame 11. A schematic diagram of the structure of the lead-out mover 3 is shown below. Figure 7 As shown.

[0040] Furthermore, such as Figure 3 As shown, the second cavity is also provided with a side groove 16 for wiring the coil 12.

[0041] Preferred, such as Figure 4 As shown, the cross-section of the first cavity is rectangular, and each of the four corners of the first cavity is provided with a clearance groove 15. The clearance groove 15 is connected to the stepped through hole 14, and the clearance groove 15 is used to facilitate the installation of the magnetic pole plate 13.

[0042] Preferably, the cross-section of the second cavity is rectangular, and all four corners of the second cavity are chamfered.

[0043] Preferably, the height of the linear motor perpendicular to the direction of the magnetic pole plate 13 is less than 20mm.

[0044] Preferably, the magnetic steel sheet 22 is a neodymium iron boron permanent magnet. By using a high-performance neodymium iron boron permanent magnet, the magnetic field strength is enhanced, and the thrust and efficiency of the motor are improved.

[0045] like Figure 8 As shown, this embodiment also provides a linear motor module, including a base 6 and a sliding component 5. The linear motor module is fixedly connected to a single-sided ironless linear motor 4 provided in this embodiment. The stator assembly 2 of the linear motor is fixedly connected to the base 6, and the mover assembly 1 of the linear motor is fixedly connected to the sliding component 5, so that the single-sided ironless linear motor 4 provides thrust to the linear motor module.

[0046] The embodiments of this utility model achieve the following technical effects:

[0047] 1. Based on the coreless design, this application further optimizes the motor structure and adjusts the layout of the coil and permanent magnet, realizing an ultra-thin single-sided motor structure, which improves space utilization and is suitable for space-constrained scenarios; it simplifies the installation and maintenance of the motor, reduces manufacturing costs, reduces the mass of the mover, reduces inertia, and improves the dynamic performance of the motor.

[0048] 2. By optimizing the internal structure of the motor, a smaller cogging effect is achieved, resulting in smoother movement of the mover and higher positioning accuracy;

[0049] 3. High-performance neodymium iron boron permanent magnets are used, which enhances the magnetic field strength and improves the thrust and efficiency of the motor.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A single-sided coreless linear motor, characterized in that, It includes a stator assembly (2) and a mover assembly (1) arranged opposite each other along the height direction of the motor, wherein: The stator assembly (2) includes magnets (22) and a yoke (21), with a plurality of magnets (22) evenly spaced and fixed to the top surface of the yoke (21); The moving part assembly (1) includes a coil frame (11), a coil (12) and a magnetic pole plate (13). The coil frame (11) has a stepped through hole (14). The upper hole and the lower hole of the stepped through hole (14) respectively form the first cavity and the second cavity of the coil frame (11). The magnetic pole plate (13) is installed inside the first cavity. The coil (12) is installed inside the second cavity. The side of the coil frame (11) close to the coil (12) is adjacent to the magnetic steel sheet (22). There is a non-contact gap between the surface of the coil (12) and the magnetic steel sheet (22).

2. A single-sided coreless linear motor according to claim 1, characterized in that, The mover assembly (1) further includes a lead-out mover (3), which is fixedly connected to the coil frame (11) through a mounting hole located on the side wall of the coil frame (11), and one end of the lead-out mover (3) extends to the outside of the coil frame (11).

3. A single-sided coreless linear motor according to claim 1, characterized in that, The second cavity is also provided with a side groove (16) for wiring of the coil (12).

4. A single-sided coreless linear motor according to claim 1, characterized in that, The plurality of coils (12) are uniformly arranged along the length or width of the second cavity.

5. A single-sided coreless linear motor according to claim 1, characterized in that, Multiple magnetic steel sheets (22) are uniformly arranged along the length or width direction of the magnetic yoke (21).

6. A single-sided coreless linear motor according to claim 1, characterized in that, The cross-section of the coil frame (11) has the same shape as the cross-section of the magnetic yoke (21).

7. A single-sided coreless linear motor according to claim 1, characterized in that, The cross-section of the first cavity is rectangular, and each of the four corners of the first cavity is provided with a clearance groove (15), which is connected to the stepped through hole (14).

8. A single-sided coreless linear motor according to claim 1, characterized in that, The height of the linear motor perpendicular to the magnetic pole plate (13) is less than 20 mm.

9. A single-sided coreless linear motor according to claim 1, characterized in that, The magnetic steel sheet (22) is a neodymium iron boron permanent magnet.

10. A linear motor module, characterized in that, The linear motor module includes a base (6) and a sliding component (5), and is connected to a single-sided coreless linear motor according to any one of claims 1 to 9, wherein the stator assembly (2) of the linear motor is fixedly connected to the base (6), and the mover assembly (1) of the linear motor is fixedly connected to the sliding component (5).

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