An ultra-long stroke linear motor mover mounting structure

Abstract

The application discloses a kind of super long stroke linear motor moving element mounting structure, it is related to linear motor field, it includes bed body, the inner side of the bed body is equipped with auxiliary slide rail, the inner side of the bed body is also provided with motor backplate, the lower part of the motor backplate is equipped with auxiliary sliding block, the motor backplate is slidably connected by auxiliary sliding block and auxiliary slide rail, the inner side of the bed body middle part is equipped with center column, the both sides of the center column are equipped with stator, the inner side of the motor backplate is equipped with the moving element compatible with stator.The application is designed by moving element backplate, and the top is provided with a sliding table mounting reference surface, the bottom is provided with an auxiliary rail sliding block interface, and the modular splicing mode allows multiple moving element backplates to be expanded longitudinally along the bed body without limit.The structure can be copied, and the driving force can be met while expanding a larger movement stroke.This installation method can minimize the base error during installation, reduce transportation costs, and is more convenient to assemble.

Description

Technical Field

[0001] This application relates to the field of linear motors, and in particular to a mover mounting structure for an ultra-long stroke linear motor. Background Technology

[0002] A linear motor is a type of motor that directly converts electrical energy into linear motion without any intermediate transmission mechanism. The key feature of a linear motor is that it directly generates linear motion. Compared to the "rotary motor + ball screw" method, which indirectly generates linear motion, linear motors offer higher precision, faster speed, more integrated dimensions, and simpler maintenance.

[0003] Chinese Patent 1. Double-sided Magnet Linear Motor CN202311806311.2 discloses a double-sided magnet linear motor, including a stator module, a mover module, and a liquid cooling assembly. The stator module includes a first stator and a second stator, which are arranged opposite to each other along a first direction. The mover module includes a first mover and a second mover, which are located between the first stator and the second stator along the first direction. The first mover is arranged opposite to the first stator, and the second mover is arranged opposite to the second stator. The first mover, the second mover, and the liquid cooling assembly are configured to reciprocate relative to the first stator and the second stator along a second direction, which is perpendicular to the first direction. In this application, the liquid cooling assembly is located outside the mover module, which is beneficial to increasing the space for accommodating coolant and thus improving the heat dissipation effect. However, in the above device, the reliance on an integral mover mounting base results in the accumulation of base errors during ultra-long strokes, leading to high manufacturing and transportation costs.

[0004] Chinese Patent 2. A Linear Motor for High-Precision Machine Tools CN202322885191.1 discloses a linear motor for high-precision machine tools, comprising: a stator mounting base, two mover mounting bases located on both sides of the stator mounting base, and a connecting base connecting the two mover mounting bases; the connecting base and the two mover mounting bases form a receiving cavity, with a portion of the stator mounting base placed within the receiving cavity such that the two sides of the stator mounting base are respectively positioned opposite to the inner sides of the corresponding mover mounting bases; a mover and a stator are respectively fixed on the inner side of the mover mounting base and the two sides of the stator mounting base; a rolling shoe assembly is provided between each mover mounting base and the stator mounting base, the rolling shoe assembly being located on the inner side wall of the mover mounting base away from the side connected to the connecting base. This utility model prevents the connecting base from bending deformation, solving the problem that the normal magnetic attraction force of the linear motor affects the accuracy and motion control performance of high-precision machine tools. In the above-mentioned device, the auxiliary rail slider and the mover are independently adjustable, resulting in low assembly efficiency. Utility Model Content

[0005] To address the issues of accumulated base errors, high manufacturing and transportation costs, and low assembly efficiency associated with ultra-long stroke linear motors, this application provides a mounting structure for the actuator of an ultra-long stroke linear motor.

[0006] The technical solution for the mounting structure of an ultra-long stroke linear motor mover provided in this application is as follows: The device includes a bed frame, an auxiliary slide rail installed on the inner side of the bed frame, a motor backplate also installed on the inner side of the bed frame, an auxiliary slider installed on the lower part of the motor backplate, the motor backplate being slidably connected to the auxiliary slide rail via the auxiliary slider, a central column installed in the middle of the inner side of the bed frame, stators installed on both sides of the central column, and a mover adapted to the stator installed on the inner side of the motor backplate.

[0007] By adopting the above technical solution, an auxiliary rail slider interface is provided at the bottom. In the modular splicing mode, multiple moving back plates can be infinitely extended along the longitudinal direction of the bed. The structure can be replicated, which can meet the driving force while also expanding the motion stroke, thereby increasing the overall stroke.

[0008] Preferably, there are two motor back plates and movers, which are located on both sides of the central column and arranged opposite each other.

[0009] By adopting the above technical solution, the stator is the fixed part of the linear motor, which provides the driving force source for the mover. The mover has small inertia and high acceleration, which supports high-speed motion. Its motion trajectory is guided by the stator magnetic field and constrained by the guide rail system.

[0010] Preferably, the lower part of the motor back plate has a mounting chamber between it and the auxiliary slider, and a first gasket is installed inside the mounting chamber.

[0011] By adopting the above technical solution, the first shim can be used for precision adjustment. The purpose of adjusting the precision can be achieved simply by modifying the shim.

[0012] Preferably, a slide table is slidably mounted on the upper part of the bed, a connecting groove is provided on the lower part of the slide table, and a protrusion is provided on the upper part of the motor back plate.

[0013] By adopting the above technical solution, the slide can be easily moved by connecting the protruding part with the slide.

[0014] Preferably, the protrusion is located inside the connecting groove, and a second gasket is installed between the protrusion and the inner wall of the connecting groove.

[0015] By adopting the above technical solution, the connection accuracy between the protrusion and the slide can be controlled by adjusting the second shim inside the connecting groove.

[0016] Preferably, the bed and the slide are connected by two sets of mutually cooperating sliding components, which are mutually compatible slide rails and sliders.

[0017] By adopting the above technical solution, a linear motor can drive the slide table to move along the bed, and the slide table can drive the crossbeam to move horizontally.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. This application uses a mover backplate design, with a slide table mounting reference surface at the top and an auxiliary rail slider interface at the bottom. In the modular splicing mode, multiple mover backplates can be infinitely extended along the longitudinal direction of the bed. The structure can be replicated, satisfying the driving force while also expanding the motion stroke. This installation method can minimize base error during installation, reduce transportation costs, and make assembly more convenient. 2. This application enables coordinated positioning of the upper and lower ends by setting up dual reference plane positioning and shim adjustment. The upper end is roughly positioned by relying on the slide table shoulder, and the lower end is precisely positioned by the auxiliary rail slider. Precision adjustment only requires adjusting the shims, thus improving the overall practicality. Attached Figure Description

[0019] Figure 1 This is a front view of the bed portion of a linear motor mover mounting structure according to an embodiment of this application. Figure 2 This is a schematic diagram illustrating the overall structure of the embodiments of this application; Figure 3 This is a schematic diagram illustrating the overall front structure of the embodiments of this application; Figure 4 This is a schematic diagram illustrating the enlarged structure of part A, which is the main embodiment of this application. Reference numerals: 1. Bed; 2. Auxiliary slide rail; 3. Auxiliary slider; 4. Motor back plate; 5. First gasket; 6. Mover; 7. Center column; 8. Stator; 9. Slide table; 10. Connecting groove; 11. Protrusion; 12. Second gasket; 13. Mounting chamber; 14. Crossbeam. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0021] This application discloses an ultra-long stroke linear motor mover mounting structure, including a bed 1, an auxiliary slide rail 2 mounted on the inner side of the bed 1, a motor back plate 4 also mounted on the inner side of the bed 1, an auxiliary slider 3 mounted on the lower part of the motor back plate 4, the motor back plate 4 being slidably connected to the auxiliary slide rail 2 via the auxiliary slider 3, a central column 7 mounted in the middle of the inner side of the bed 1, stators 8 mounted on both sides of the central column 7, and a mover 6 adapted to the stator 8 mounted on the inner side of the motor back plate 4. A mounting chamber 13 is located between the lower part of the motor back plate 4 and the auxiliary slider 3, and a first gasket 5 is installed inside the mounting chamber 13. There are two motor back plates 4 and two movers 6, located opposite each other on both sides of the central column 7. Through the design of the mover 6 back plate, a slide table 9 is provided at the top for mounting reference, and an auxiliary rail slider interface is provided at the bottom. In a modular splicing mode, multiple segments of the mover 6 back plate can be infinitely extended along the longitudinal direction of the bed, the structure can be replicated, satisfying the driving force while also extending the greater motion stroke.

[0022] Please refer to Figures 1 to 4 A slide table 9 is slidably mounted on the upper part of the bed 1. A connecting groove 10 is provided on the lower part of the slide table 9. A protrusion 11 is provided on the upper part of the motor back plate 4. The protrusion 11 is located inside the connecting groove 10, and a second shim 12 is installed between the protrusion 11 and the inner wall of the connecting groove 10. By adjusting the second shim 12 inside the connecting groove 10, the connection accuracy between the protrusion 11 and the slide table 9 can be controlled.

[0023] Please refer to Figure 2 and Figure 3 The bed 1 and the slide 9 are connected by two sets of mutually cooperating sliding components. The sliding components are mutually compatible slide rails and sliders. A crossbeam 14 is installed on the slide 9. The slide 9 can be driven to move by a linear motor, so that the slide 9 moves along the bed 1. The slide 9 can drive the crossbeam 14 to move horizontally.

[0024] The implementation principle of the ultra-long stroke linear motor mover mounting structure in this application embodiment is as follows: In this application, the motor back plate 4 is made of aluminum. The aluminum back plate fixes the iron core through a steel lamination structure to form a closed magnetic field loop, ensuring that the electromagnetic force is efficiently transmitted along the linear direction, while enhancing the thrust output. Aluminum has high thermal conductivity, which can quickly disperse the heat generated by the motor operation and avoid local overheating affecting performance. At the same time, the aluminum back plate serves as a structural support component to ensure the rigidity and positioning accuracy of the motor assembly. The back plate design needs to consider the attraction between the mover 6 and the magnetic rail (such as U-shaped groove motors, which need to avoid mechanical damage caused by attraction). Therefore, an anti-attraction structure or installation process needs to be adopted to reduce the risk.

[0025] The stator 8 is the stationary part of the linear motor, typically consisting of an iron core, windings, and a housing. When energized, it generates a traveling wave magnetic field along the guide rails, providing the driving force for the mover 6. The magnetic field distribution of the stator directly affects the thrust density and motion accuracy. For example, using laminated silicon steel sheets can enhance the magnetic permeability and improve thrust performance.

[0026] The mover 6 is the actual moving component in the linear motor, typically composed of a permanent magnet or electromagnetic coil. Driven by the Lorentz force under the influence of a traveling wave magnetic field, it achieves contactless linear motion. The mover 6 has low inertia and high acceleration, supporting high-speed motion. Its trajectory is guided by the magnetic field of the stator 8 and constrained by a guide rail system. By changing the current frequency of the stator 8 windings, the speed and direction of the mover 6 can be precisely controlled. In practical applications, the relative position of the mover 6 and stator 8 is fed back in real time by an encoder, achieving micron-level positioning accuracy. The encoder is existing technology and will not be elaborated upon here. With the design of the mover 6 backplate: the top is equipped with a slide table 9 mounting reference surface, and the bottom is equipped with an auxiliary rail slider interface. In the modular splicing mode, multiple sections of the mover 6 backplate can be infinitely extended along the longitudinal direction of the bed 1. The structure can be replicated, which can meet the driving force while also expanding the motion stroke. Dual reference plane positioning and shim adjustment: The upper and lower ends are positioned in a coordinated manner. The upper end is roughly positioned by the shoulder of the slide table 9, and the lower end is precisely positioned by the auxiliary rail slider. The accuracy adjustment only requires the shim to be fitted.

[0027] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mounting structure for the rotor of an ultra-long stroke linear motor, characterized in that: The bed includes a bed (1), an auxiliary slide rail (2) is installed on the inner side of the bed (1), a motor back plate (4) is also provided on the inner side of the bed (1), an auxiliary slider (3) is installed on the lower part of the motor back plate (4), the motor back plate (4) is slidably connected to the auxiliary slide rail (2) through the auxiliary slider (3), a central column (7) is installed in the middle of the inner side of the bed (1), stators (8) are installed on both sides of the central column (7), and a mover (6) adapted to the stator (8) is installed on the inner side of the motor back plate (4).

2. The mounting structure for an ultra-long stroke linear motor mover according to claim 1, characterized in that: The number of motor backplates (4) and movers (6) is two, which are located on both sides of the central column (7) and are arranged opposite to each other.

3. The mounting structure for an ultra-long stroke linear motor mover according to claim 2, characterized in that: The lower part of the motor back plate (4) and the auxiliary slider (3) have an installation chamber (13), and a first gasket (5) is installed inside the installation chamber (13).

4. The mounting structure for an ultra-long stroke linear motor mover according to claim 3, characterized in that: A slide table (9) is slidably installed on the upper part of the bed (1), and a connecting groove (10) is provided on the lower part of the slide table (9). A protrusion (11) is provided on the upper part of the motor back plate (4).

5. The mounting structure for an ultra-long stroke linear motor mover according to claim 4, characterized in that: The protrusion (11) is located inside the connecting groove (10), and a second gasket (12) is installed between the protrusion (11) and the inner wall of the connecting groove (10).

6. The mounting structure for an ultra-long stroke linear motor mover according to claim 3, characterized in that: The bed (1) and the slide (9) are connected by two sets of mutually cooperating sliding components, which are mutually compatible slide rails and sliders. A crossbeam (14) is installed on the slide (9).

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