Linear motor platform

Abstract

The application discloses a linear motor platform. The linear motor platform comprises a base, a first mounting plate and a second mounting plate. The base is provided with a first through hole in a vertical direction; the first mounting plate is capable of moving along a first horizontal direction relative to the base, and the first mounting plate is provided with a second through hole in the vertical direction and in communication with the first through hole. The second mounting plate is capable of moving along a second horizontal direction relative to the first mounting plate, and the second mounting plate is provided with a third through hole in the vertical direction and in communication with the second through hole. The area of the first through hole is smaller than that of the second through hole, the area of the second through hole is smaller than that of the third through hole, and the first through hole, the second through hole and the third through hole always have an overlapping area in the vertical direction. The three through holes are in communication with each other and form a hollow structure of the linear motor platform, thereby providing a light path channel for light emitted by a device below the linear motor platform, and the overlapping area between the through holes in the vertical direction enables normal transmission of the light path.

Description

Technical Field

[0001] This application relates to the field of linear motor technology, and in particular to a linear motor platform. Background Technology

[0002] Linear motor platforms are widely used as core motion components in modern industrial inspection and many specialized applications. In related technologies, linear motor platforms are mostly solid structures, playing a vital role in general industrial production.

[0003] With the continuous development of technology, in some special fields, such as optical inspection, microscopic imaging, and laser processing, it is necessary to arrange mirror groups and light sources below the center of the linear motor platform. However, the solid structure of the linear motor platform cannot make the mirror group below face upwards for normal optical path transmission. Utility Model Content

[0004] This application provides a linear motor platform that ensures the platform's hollow space is not obstructed whether it is stationary or in motion, thus guaranteeing that the light emitted from the device below remains unobstructed and ensuring unimpeded light transmission.

[0005] The linear motor platform proposed in this application includes:

[0006] The base has a first through hole along the vertical direction;

[0007] A first mounting plate is connected to the base. The first mounting plate is movable relative to the base in a first horizontal direction. The first mounting plate has a second through hole in the vertical direction that communicates with the first through hole.

[0008] The second mounting plate is disposed on the side of the first mounting plate away from the base. The second mounting plate is movable relative to the first mounting plate in a second horizontal direction. The second mounting plate has a third through hole in the vertical direction that communicates with the second through hole.

[0009] The area of ​​the first through hole is smaller than the area of ​​the second through hole, the area of ​​the second through hole is smaller than the area of ​​the third through hole, and there is always an overlapping area between the first through hole, the second through hole and the third through hole in the vertical direction.

[0010] Optionally, along the first horizontal direction, the size of the second through hole is larger than the size of the first through hole, and the size of the third through hole is greater than or equal to the size of the second through hole;

[0011] Along the second horizontal direction, the size of the second through hole is greater than or equal to the size of the first through hole, and the size of the third through hole is greater than the size of the second through hole.

[0012] Optionally, the first through hole, the second through hole, and the third through hole are all square holes; or, the first through hole, the second through hole, and the third through hole are all round holes.

[0013] Optionally, the linear motor platform includes a first limiting component and a second limiting component. The first limiting component includes a first limiting block, which is disposed on the base. The first limiting block is used to limit the displacement of the first mounting plate along the first horizontal direction.

[0014] The second limiting component includes a second limiting block, which is disposed on the first mounting plate and is used to limit the displacement of the second mounting plate along the second horizontal direction.

[0015] Optionally, the linear motor platform further includes a first displacement sensor and a second displacement sensor. The first displacement sensor is mounted on the base and is used to detect the amount of displacement of the first mounting plate relative to the base.

[0016] The second displacement sensor is mounted on the first mounting plate and is used to detect the amount of displacement of the second mounting plate relative to the first mounting plate.

[0017] Optionally, the base is provided with a first guide rail extending along the first horizontal direction, and the first mounting plate is provided with a first sliding seat, which is slidably disposed on the first guide rail;

[0018] The second mounting plate is provided with a second guide rail extending along the second horizontal direction, and the first mounting plate is provided with a second sliding seat on the side opposite to the first sliding seat, and the second sliding seat is slidably disposed on the second guide rail.

[0019] Optionally, the linear motor platform further includes a first drive assembly and a second drive assembly;

[0020] The first drive assembly includes a first motor stator and a first motor mover. The first motor stator is disposed on the base, and the first motor mover is disposed on the first mounting plate. The first motor mover is slidably disposed on the first motor stator.

[0021] The second drive assembly includes a second motor stator and a second motor mover. The second motor stator is disposed on the second mounting plate, and the second motor mover is disposed on the side of the first mounting plate opposite to the first motor mover. The second motor mover is slidably disposed on the second motor stator.

[0022] Optionally, the linear motor platform further includes a first grating ruler and a first reading head. The first grating ruler is disposed on the base, and the first reading head is disposed on the first mounting plate. The first grating ruler is used to detect the moving distance of the first mounting plate along the first horizontal direction, and the first reading head is used to read the value of the first grating ruler.

[0023] Optionally, along the second horizontal direction, the first grating ruler and the first motor stator are respectively disposed on both sides of the base, and the first reading head and the first motor mover are respectively disposed on both sides of the first mounting plate.

[0024] Optionally, the linear motor platform further includes a second grating ruler and a second reading head. The second grating ruler is disposed on the second mounting plate, and the second reading head is disposed on the first mounting plate. The second grating ruler is used to detect the moving distance of the second mounting plate along the second horizontal direction, and the second reading head is used to read the value of the second grating ruler.

[0025] Optionally, along the first horizontal direction, the second grating ruler and the second motor stator are respectively disposed on both sides of the second mounting plate, and the second reading head and the second motor mover are respectively disposed on both sides of the first mounting plate.

[0026] In the linear motor platform provided in this embodiment, a first through hole is formed on the base, a second through hole is formed on the first mounting plate, and a third through hole is formed on the second mounting plate. The three through holes are interconnected, forming a hollow structure for the linear motor platform. This provides an optical path for light emitted from devices such as mirrors or light sources below the linear motor platform, ensuring that the emitted light can pass smoothly through the linear motor platform. The areas of the first, second, and third through holes gradually increase from bottom to top in the vertical direction, and there is always an overlapping area between them in the vertical direction to ensure normal light transmission. This avoids obstruction of the hollow structure during the movement of the first and second mounting plates, ensuring that the light emitted from below the linear motor platform is always unobstructed. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the linear motor platform provided in an embodiment of this application.

[0029] Figure 2 This is an exploded view of the linear motor platform provided in an embodiment of this application.

[0030] Figure 3 This is an exploded view of the linear motor platform provided in the embodiments of this application.

[0031] Figure 4 This is an exploded view of the linear motor platform provided in an embodiment of this application.

[0032] Explanation of icon numbers:

[0033] Motor platform 100, base 10, first through hole 101, first mounting plate 20, second through hole 201, second mounting plate 30, third through hole 301;

[0034] First limiting component 41, first limiting block 411, third limiting block 412, second limiting component 42, second limiting block 421, fourth limiting block 422;

[0035] First displacement sensor 51, second displacement sensor 52;

[0036] First guide rail 61, first sliding seat 62, second guide rail 63, second sliding seat 64;

[0037] First drive assembly 71, first motor stator 711, first sliding groove 7111, first motor mover 712, second drive assembly 72, second motor stator 721, second sliding groove 7211;

[0038] Second motor mover 722, first grating ruler 81, first reading head 82, second grating ruler 83, second reading head 84.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] It should be understood that the term "and / or" as used in this application specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0045] Please see Figures 1-2 , Figure 1 This is a schematic diagram of the structure of the linear motor platform 100 provided in the embodiments of this application. Figure 2 This is an exploded view of the linear motor platform 100 provided in an embodiment of this application. The linear motor platform 100 provided in this application includes a base 10, a first mounting plate 20, and a second mounting plate 30. The base 10, the first mounting plate 20, and the second mounting plate 30 can all be made of marble. Marble has advantages such as high hardness, strong wear resistance, good thermal stability, and minimal deformation, thereby providing a high-precision and high-stability working foundation for the linear motor platform 100.

[0046] The base 10 has a first through hole 101 along the vertical direction Z. The base 10 serves as the basic support component of the linear motor platform 100. The base 10 can be disc-shaped, cuboid-shaped, or otherwise, without limitation. The dimensions of the base 10 are determined based on the actual application scenario and load-bearing requirements. The first through hole 101 is located at the center of the base 10 along the vertical direction Z. The first through hole 101 can be circular, rectangular, trapezoidal, or other shapes. A mirror assembly and a light source can be installed below the base 10. At least some of these devices can be accommodated in the first through hole 101; that is, in addition to providing a partial optical path for the devices, the first through hole 101 can also be used to accommodate some of the devices.

[0047] The first mounting plate 20 is connected to the base 10. The first mounting plate 20 can move relative to the base 10 in the first horizontal direction Y. The first mounting plate 20 has a second through hole 201 that communicates with the first through hole 101 in the vertical direction Z.

[0048] The first mounting plate 20 and the base 10 can be connected by a combination of guide rails and sliders. For example, two parallel linear guide rails are mounted on the upper surface of the base 10 along the first horizontal direction Y, and sliders that cooperate with the linear guide rails are mounted at corresponding positions on the lower surface of the first mounting plate 20, so that the first mounting plate 20 can move smoothly in a straight line relative to the base 10 along the first horizontal direction Y. The linear guide rails can be sliding linear guide rails or rolling linear guide rails, etc.

[0049] The second mounting plate 30 is located on the side of the first mounting plate 20 facing away from the base 10. The second mounting plate 30 can move relative to the first mounting plate 20 along the second horizontal direction X. The second mounting plate 30 has a third through hole 301 in the vertical direction Z that communicates with the second through hole 201. The second mounting plate 30 and the first mounting plate 20 can be connected by another set of linear guides and sliders. For example, a linear guide is mounted on the upper surface of the first mounting plate 20 along the second horizontal direction X, and a slider that cooperates with the linear guide is mounted at a corresponding position on the lower surface of the second mounting plate 30, so that the second mounting plate 30 can move smoothly in a straight line relative to the first mounting plate 20 along the second horizontal direction X.

[0050] The area of ​​the first through hole 101 is smaller than the area of ​​the second through hole 201, and the area of ​​the second through hole 201 is smaller than the area of ​​the third through hole 301. The first through hole 101, the second through hole 201, and the third through hole 301 always maintain an overlapping area along the vertical direction Z.

[0051] A second through hole 201 communicating with the first through hole 101 is provided on the first mounting plate 20 along the vertical direction Z. The second through hole 201 can be circular, rectangular, trapezoidal, or other shapes. The area of ​​the first through hole 101 is smaller than the area of ​​the second through hole 201, and there is always an overlapping area between the first through hole 101 and the second through hole 201 along the vertical direction Z.

[0052] When the first mounting plate 20 moves relative to the base 10 along the first horizontal direction Y within a certain range, the projection of the second through hole 201 along the vertical direction Z always covers the projection of the first through hole 101. That is, the light emitted by the light source below the base 10 can pass through the first through hole 101 and exit through the second through hole 201, ensuring that the light emitted from below the base 10 is not blocked by the movement of the first mounting plate 20.

[0053] A third through hole 301 communicating with the second through hole 201 is formed on the second mounting plate 30 along the vertical direction Z. The third through hole 301 can be circular, rectangular, trapezoidal, or other shapes. The area of ​​the second through hole 201 is smaller than the area of ​​the third through hole 301. The third through hole 301 and the second through hole 201 always maintain an overlapping area along the vertical direction Z. At the same time, the third through hole 301 and the first through hole 201 also always maintain an overlapping area along the vertical direction Z.

[0054] When the second mounting plate 30 moves relative to the first mounting plate 20 along the second horizontal direction X within a certain range of motion, the projection of the third through hole 301 along the vertical direction Z can always cover the projection of the second through hole 201. That is, the light emitted by the light source below the base 10 can pass through the first through hole 101, pass through the second through hole 201, and finally pass out through the third through hole 301.

[0055] Wherein, the first horizontal direction Y can be understood as the length direction of the linear motor platform 100, the second horizontal direction X can be understood as the width direction of the linear motor platform 100, and the vertical direction Z can be understood as the height direction of the linear motor platform 100.

[0056] In a practical application, in an optical inspection scenario, the object to be inspected is placed above the second mounting plate 30, and an optical inspection device is installed below the base 10. The light emitted by the optical inspection device passes sequentially through the first through hole 101, the second through hole 201, and the third through hole 301, and shines upward onto the surface of the object to be inspected. The reflected light can return along the original path and enter the inspection equipment for analysis.

[0057] In the linear motor platform 100 provided in this embodiment, a first through hole 101 is formed on the base 10, a second through hole 201 is formed on the first mounting plate 20, and a third through hole 301 is formed on the second mounting plate 30. The three through holes are interconnected to form a hollow structure in the linear motor platform 100, providing an optical path for devices such as mirrors or light sources below the linear motor platform 100, ensuring that the emitted light can pass smoothly through the linear motor platform 100. Furthermore, along the vertical direction Z from bottom to top, the areas of the first through hole 101, the second through hole 201, and the third through hole 301 gradually increase, and there is always an overlapping area between the first through hole 101, the second through hole 201, and the third through hole 301 along the vertical direction Z to ensure normal transmission of the optical path. This avoids the first mounting plate 20 and the second mounting plate 30 from blocking the hollow structure during their movement, ensuring that the light emitted from below the linear motor platform 100 is always unobstructed.

[0058] Optionally, along the first horizontal direction Y, the size of the second through hole 201 is larger than the size of the first through hole 101, and the size of the third through hole 301 is greater than or equal to the size of the second through hole 201. Along the second horizontal direction X, the size of the second through hole 201 is greater than or equal to the size of the first through hole 101, and the size of the third through hole 301 is greater than the size of the second through hole 201.

[0059] Since the first mounting plate 20 can move relative to the base 10 along the first horizontal direction Y, and the size of the second through hole 201 in the first horizontal direction Y is larger than the size of the first through hole 101, the first mounting plate 20 can increase its stroke in the first horizontal direction Y without completely blocking the first through hole 101 during its movement.

[0060] Meanwhile, the size of the second through hole 201 in the second horizontal direction X is greater than or equal to the size of the first through hole 101, which increases the stroke of the second mounting plate 30 in the second horizontal direction X. The increased stroke of the first mounting plate 20 and the second mounting plate 30 enables the linear motor platform 100 to adapt to some optical inspection scenarios that require large stroke positioning.

[0061] Similarly, since the second mounting plate 30 can move relative to the first mounting plate 20 along the second horizontal direction X, and the size of the third through hole 301 in the second horizontal direction X is controlled to be larger than the size of the second through hole 201, the second mounting plate 30 can increase its stroke in the second horizontal direction X without completely blocking the second through hole 201 during its movement.

[0062] The size of the third through hole 301 in the first horizontal direction Y is greater than or equal to the size of the second through hole 201, which can also increase the stroke of the first mounting plate 20 in the first horizontal direction Y. The increased stroke of the first mounting plate 20 and the second mounting plate 30 enables the linear motor platform 100 to adapt to some optical inspection scenarios that require large stroke positioning.

[0063] Optionally, the first through hole 101, the second through hole 201, and the third through hole 301 are all square holes. For ease of processing, the shapes of the first through hole 101, the second through hole 201, and the third through hole 301 are similar. When the first through hole 101, the second through hole 201, and the third through hole 301 are all square holes, the area of ​​the first through hole 101 is smaller than the area of ​​the second through hole 201, and the area of ​​the second through hole 201 is smaller than the area of ​​the third through hole 301.

[0064] Optionally, the first through hole 101, the second through hole 201, and the third through hole 301 are all circular holes. For ease of processing, the first through hole 101, the second through hole 201, and the third through hole 301 have similar shapes. When the first through hole 101, the second through hole 201, and the third through hole 301 are all circular holes, the diameter of the first through hole 101 is smaller than the diameter of the second through hole 201, and the diameter of the second through hole 201 is smaller than the diameter of the third through hole 301.

[0065] Optionally, the linear motor platform 100 includes a first limiting component 41 and a second limiting component 42. The first limiting component 41 includes a first limiting block 411, which is disposed on the base 10. The first limiting block 411 is used to limit the displacement of the first mounting plate 20 along the first horizontal direction Y. By limiting the travel of the first mounting plate 20 in the first horizontal direction Y, the first mounting plate 20 is prevented from exceeding a certain travel range during movement, thus avoiding the first mounting plate 20 completely blocking the first through hole 101. The first limiting component 41 ensures that during the movement of the first mounting plate 20, the projection of the second through hole 201 can still cover the projection of the first through hole 101, ensuring that light and other light can smoothly pass through the first through hole 101 and exit through the second through hole 201.

[0066] Specifically, the first limiting block 411 can be made of aluminum alloy, which has good strength and impact resistance. The first limiting block 411 can be cuboid in shape and can be fixed to the upper surface of the base 10 by bolts and then locked with a lock nut. The number of first limiting blocks 411 can be one, two, three, or four, etc., and there is no limitation. Generally, the number of first limiting blocks 411 is even and they are arranged on both sides along the first horizontal direction Y, so as to provide effective limiting effect when the first mounting plate 20 moves to both sides, forming a bidirectional constraint and ensuring that the first mounting plate 20 moves within a specified stroke.

[0067] In one embodiment, there are four first limiting blocks 411, which are arranged at the four corners of the upper surface of the base 10, and the first through hole 101 is located at the center of the four first limiting blocks 411. Thus, when the first mounting plate 20 reciprocates along the first horizontal direction Y, the first limiting blocks 411 provide effective limiting, ensuring that the first mounting plate 20 moves within a specified stroke, preventing the first through hole 101 from being blocked by the first mounting plate 20, and also preventing the first mounting plate 20 from moving excessively and detaching from the base 10.

[0068] In some embodiments, a buffer layer is provided on the first limiting block 411 to absorb part of the impact energy and reduce the impact of the rigid collision of the first limiting block 411 on the first mounting plate 20.

[0069] The second limiting component 42 includes a second limiting block 421, which is disposed on the first mounting plate 20. The second limiting block 421 is used to limit the displacement of the second mounting plate 30 along the second horizontal direction X. By limiting the travel of the second mounting plate 30 in the second horizontal direction X, the second mounting plate 30 is prevented from exceeding a certain travel range during movement, which would cause the second mounting plate 30 to completely block the second through hole 201. The second limiting block 421 ensures that during the movement of the second mounting plate 30, the projection of the third through hole 301 can still cover the projection of the second through hole 201, ensuring that light and other light can smoothly enter from the first through hole 101, enter the second through hole 201, and exit from the third through hole 301.

[0070] Specifically, the second limiting block 421 can be made of aluminum alloy, which has good strength and impact resistance. The second limiting block 421 can be cuboid in shape and can be fixed to the upper surface of the first mounting plate 20 by bolts, and then locked using a lock nut. The number of second limiting blocks 421 can be one, two, three, or four, etc., without limitation. Generally, the number of second limiting blocks 421 is even and they are arranged on both sides along the second horizontal direction X, thereby providing an effective limiting effect when the second mounting plate 30 moves to both sides, forming a bidirectional constraint, and ensuring that the second mounting plate 30 moves within a specified stroke.

[0071] In one embodiment, there are four second limiting blocks 421, which are arranged at the four corners of the upper surface of the first mounting plate 20, and the second through hole 201 is located at the center of the four second limiting blocks 421. Thus, when the second mounting plate 30 reciprocates along the second horizontal direction X, the second limiting blocks 421 provide effective limiting, ensuring that the second mounting plate 30 moves within a specified stroke, preventing the second through hole 201 from being blocked by the second mounting plate 30, and also preventing the second mounting plate 30 from moving excessively and detaching from the connection with the first mounting plate 20.

[0072] In some embodiments, a buffer layer is provided on the second limiting block 421 to absorb part of the impact energy and reduce the impact of rigid collisions of the second limiting block 421 on the second mounting plate 30.

[0073] Please see Figure 2 Optionally, the first limiting component 41 further includes a third limiting block 412 disposed on the first mounting plate 20. When the first mounting plate 20 moves along the first horizontal direction Y to the first preset position, the first limiting block 411 abuts against the third limiting block 412 to limit the displacement of the first mounting plate 20.

[0074] When the third limiting block 412 impacts the first limiting block 411, the first mounting plate 20 is stopped. The impact force is transmitted through the third limiting block 412, which reduces the direct impact of the first limiting block 411 on the first mounting plate 20, thereby reducing the damage to the first mounting plate 20 and other components on the first mounting plate 20.

[0075] Specifically, the third limiting block 412 may be cuboid in shape and may be bolted to the lower surface of the first mounting plate 20. The number of third limiting blocks 412 is the same as the number of first limiting blocks 411. The first preset position may be the position where the first mounting plate 20 will block the first through hole 101, and the specific distance between the first preset position and the first mounting plate 20 completely blocking the first through hole 101 can be set according to actual needs.

[0076] It should be noted that the third limiting block 412 and the first limiting block 411 can be made of different materials; one is a hard material, and the other is a soft material. While limiting the displacement of the first mounting plate 20, the soft material can also act as a buffer to absorb energy and reduce the impact of collisions. For example, the part of the first limiting block 411 that supports the third limiting block 412 can be made of rubber, while the third limiting block 412 can be made of aluminum alloy.

[0077] The second limiting component 42 also includes a fourth limiting block 422 disposed on the second mounting plate 30. When the second mounting plate 30 moves along the second horizontal direction X to the second preset position, the third limiting block 412 abuts against the fourth limiting block 422 to limit the displacement of the second mounting plate 30.

[0078] When the fourth limiting block 422 impacts the second limiting block 421, the second mounting plate 30 is stopped. The impact force is transmitted through the fourth limiting block 422, which reduces the direct impact of the second limiting block 421 on the second mounting plate 30, thereby reducing the damage to the second mounting plate 30 and other components on the second mounting plate 30.

[0079] Specifically, the fourth limiting block 422 may be cuboid in shape and may be bolted to the lower surface of the second mounting plate 30. The number of fourth limiting blocks 422 is the same as the number of second limiting blocks 421. The second preset position may be the position where the second mounting plate 30 will block the second through hole 201, and the specific distance between the second preset position and the second mounting plate 30 completely blocking the second through hole 201 can be set according to actual needs.

[0080] It should be noted that the fourth limiting block 422 and the second limiting block 421 can be made of different materials; one is a rigid material, and the other is a soft material. While limiting the displacement of the second mounting plate 30, the soft material can also act as a buffer to absorb energy and reduce the impact of collisions. For example, the part of the second limiting block 421 that supports the fourth limiting block 422 can be made of rubber, while the fourth limiting block 422 can be made of aluminum alloy.

[0081] Please see Figure 2 Optionally, the linear motor platform 100 further includes a first displacement sensor 51 and a second displacement sensor 52. The first displacement sensor 51 is mounted on the base 10 and is used to detect the amount of displacement of the first mounting plate 20 relative to the base 10. The second displacement sensor 52 is mounted on the first mounting plate 20 and is used to detect the amount of displacement of the second mounting plate 30 relative to the first mounting plate 20.

[0082] The displacement sensor detects the displacement of the first mounting plate 20 and the second mounting plate 30 to provide real-time feedback on the displacement information of the first mounting plate 20 and the second mounting plate 30. It can also control the first mounting plate 20 and the second mounting plate 30 to decelerate and stop moving.

[0083] Specifically, the first displacement sensor 51 can be electrically connected to a controller or other device of the linear motor platform 100. The first displacement sensor 51 will trigger an early warning when the first mounting plate 20 approaches its limit position and control the first mounting plate 20 to decelerate and stop moving. By using the first displacement sensor 51 to limit the travel of the first mounting plate 20 in the first horizontal direction Y, it prevents the first mounting plate 20 from exceeding a certain travel range during movement, thus avoiding complete obstruction of the first through hole 101. The first displacement sensor 51 can be a photoelectric sensor.

[0084] The second displacement sensor 52 can be electrically connected to the controller or other devices of the linear motor platform 100. The second displacement sensor 52 will trigger an early warning when the second mounting plate 30 approaches its limit position and control the second mounting plate 30 to decelerate and stop moving. The second displacement sensor 52 limits the travel of the second mounting plate 30 in the second horizontal direction X, preventing the second mounting plate 30 from exceeding a certain travel range during movement, which could cause the second mounting plate 30 to completely block the second through hole 201. The second displacement sensor 52 can be a photoelectric sensor.

[0085] The first displacement sensor 51 can be used in conjunction with the first limiting component 41, and the second displacement sensor 52 can be used in conjunction with the second limiting component 42, forming a double-insurance limiting protection for the linear motor platform 100. For example, during the operation of the linear motor platform 100, the first displacement sensor 51 and the second displacement sensor 52 monitor the displacement of the first mounting plate 20 and the second mounting plate 30 in real time. When the displacement of the mounting plate approaches a preset travel range, the first mounting plate 20 and the second mounting plate 30 are controlled to decelerate and stop in advance. If the movement fails to stop in time due to an abnormal situation, the first mounting plate 20 continues to move until the first limiting component 41 restricts its movement, and the second mounting plate 30 continues to move until the second limiting component 42 restricts its movement.

[0086] Please see Figure 3 and Figure 4 , Figure 3 This is an exploded view of the linear motor platform 100 provided in an embodiment of this application. Figure 4 This is an exploded view of the linear motor platform provided in an embodiment of this application from another perspective. Optionally, the base 10 is provided with a first guide rail 61 extending along the first horizontal direction Y, and the first mounting plate 20 is provided with a first sliding seat 62, which is slidably disposed on the first guide rail 61.

[0087] Specifically, two parallel first guide rails 61 are provided on the upper surface of the base 10 extending along the first horizontal direction Y, and the two first guide rails 61 are spaced apart on both sides of the first through hole 101 to avoid the first guide rails 61 obstructing the first through hole 101. At least two first sliding seats 62 are installed on the lower surface of the first mounting plate 20, and the first sliding seats 62 can be connected to the first mounting plate 20 by bolt connection.

[0088] Each first guide rail 61 can mate with at least one first sliding seat 62. For example, each first guide rail 61 can mate with two first sliding seats 62, wherein two first sliding seats 62 are spaced apart on the first mounting plate 20 along the length direction of one first guide rail 61, and the other two first sliding seats 62 are spaced apart on the first mounting plate 20 along the length direction of the other first guide rail 61. Each first guide rail 61 mates with two first sliding seats 62, so that when one first sliding seat 62 fails or wears out, the other first sliding seat 62 can still maintain the basic movement of the first mounting plate 20.

[0089] The second mounting plate 30 is provided with a second guide rail 63 extending along the second horizontal direction X, and the first mounting plate 20 is provided with a second sliding seat 64 on the side opposite to the first sliding seat 62. The second sliding seat 64 is slidably mounted on the second guide rail 63.

[0090] Similarly, two parallel second guide rails 63 are provided on the lower surface of the second mounting plate 30 extending along the second horizontal direction X, and the two second guide rails 63 are spaced apart on both sides of the third through hole 301 to avoid the second guide rails 63 obstructing the third through hole 301. At least two second sliding seats 64 are mounted on the upper surface of the first mounting plate 20, and the second sliding seats 64 can be connected to the first mounting plate 20 by bolt connection.

[0091] Each second guide rail 63 can mate with at least one second sliding seat 64. For example, each second guide rail 63 can mate with two second sliding seats 64, wherein two second sliding seats 64 are spaced apart on the first mounting plate 20 along the length direction of one second guide rail 63, and the other two second sliding seats 64 are spaced apart on the first mounting plate 20 along the length direction of the other second guide rail 63. Each second guide rail 63 mates with two second sliding seats 64, so that when one second sliding seat 64 fails or wears out, the other second sliding seat 64 can still maintain the basic movement of the second mounting plate 30.

[0092] Optionally, the linear motor platform 100 further includes a first drive assembly 71 and a second drive assembly 72. The first drive assembly 71 includes a first motor stator 711 and a first motor mover 712. The first motor stator 711 is disposed on the base 10, and the first motor mover 712 is disposed on the first mounting plate 20. The first motor mover 712 is slidably disposed on the first motor stator 711.

[0093] Specifically, the first motor stator 711 and the base 10 are fixedly connected by bolts, and the first motor stator 711 is provided with a first sliding groove 7111 extending along the first horizontal direction Y. The first motor mover 712 may include a neodymium iron boron permanent magnet. The first motor mover 712 extends from the first mounting plate 20 toward the base 10, and the first motor mover 712 has an overall I-shaped structure. The first motor mover 712 extends downward from the bottom surface of the first mounting plate 20 and is embedded in the first sliding groove 7111. The first motor mover 712 is slidably disposed in the first sliding groove 7111.

[0094] The second drive assembly 72 includes a second motor stator 721 and a second motor mover 722. The second motor stator 721 is disposed on the second mounting plate 30, and the second motor mover 722 is disposed on the side of the first mounting plate 20 opposite to the first motor mover 712. The second motor mover 722 is slidably disposed on the second motor stator 721.

[0095] Specifically, the second motor stator 721 and the second mounting plate 30 can be fixedly connected by bolts. The second motor stator 721 is provided with a second sliding groove 7211 extending along the second horizontal direction X. The second motor mover 722 may include a neodymium iron boron permanent magnet. The second motor mover 722 has an overall I-shaped structure. The second motor mover 722 extends from the first mounting plate 20 in a direction away from the base 10. The second motor mover 722 extends upward from the upper surface of the first mounting plate 20 and is embedded in the second sliding groove 7211. The second motor mover 722 is slidably disposed in the second sliding groove 7211.

[0096] Optionally, the linear motor platform 100 further includes a first grating ruler 81 and a first reading head 82. The first grating ruler 81 is disposed on the base 10, and the first reading head 82 is disposed on the first mounting plate 20. The first grating ruler 81 is used to detect the movement distance of the first mounting plate 20 along the first horizontal direction Y, and the first reading head 82 is used to read the value of the first grating ruler 81. In this way, the first guide rail 61 provides stable motion guidance for the first mounting plate 20, and the first grating ruler 81 and the first reading head 82 detect the displacement of the first mounting plate 20 in real time, providing accurate data for the linear motor platform 100 to facilitate subsequent motion control.

[0097] Specifically, the first grating ruler 81 is arranged parallel to the first guide rail 61 to ensure that when the first mounting plate 20 slides along the first guide rail 61, the displacement change of the first mounting plate 20 detected by the first grating ruler 81 is consistent with the actual displacement of the first mounting plate 20 on the first guide rail 61, thus avoiding measurement errors caused by installation deviations. The first reading head 82 can be rigidly connected to the side of the first mounting plate 20 through a bracket. The first reading head 82 is perpendicular to the movement direction of the first guide rail 61, so that when the first mounting plate 20 slides along the first guide rail 61, the first reading head 82 can stably and accurately read the displacement information on the first grating ruler 81.

[0098] Optionally, along the second horizontal direction X, the first grating ruler 81 and the first motor stator 711 are respectively disposed on both sides of the base 10, and the first reading head 82 and the first motor mover 712 are respectively disposed on both sides of the first mounting plate 20.

[0099] Based on the hollow structure of the linear motor platform 100, the first grating ruler 81 and the first motor stator 711 are arranged approximately symmetrically on both sides of the base 10, and the first reading head 82 and the first motor mover 712 are arranged approximately symmetrically on both sides of the first mounting plate 20, enabling the linear motor platform 100 to maintain better balance during movement. This layout also makes the overall structure of the linear motor platform 100 more compact.

[0100] In a traditional linear motor platform 100, if electrical components such as coils and reading heads move with moving parts, cable carriers are needed to store and protect the connecting cables to prevent them from being damaged by repeated bending.

[0101] In the linear motor platform 100 provided in this embodiment, the first motor stator 711 and the first grating ruler 81 mounted on the first mounting plate 20 do not require electrical cable connections, while the first motor mover 712 and the first reading head 82, which require cable connections, are mounted on the stationary base 10. Therefore, during the movement of the first mounting plate 20 relative to the base 10 along the first horizontal direction Y, the installation of auxiliary components such as cable carriers is reduced, the complexity of the linear motor platform 100 is reduced, and miniaturization design is facilitated.

[0102] Optionally, the linear motor platform 100 further includes a second grating ruler 83 and a second reading head 84. The second grating ruler 83 is disposed on the second mounting plate 30, and the second reading head 84 is disposed on the first mounting plate 20. The second grating ruler 83 is used to detect the moving distance of the second mounting plate 30 along the second horizontal direction X, and the second reading head 84 is used to read the value of the second grating ruler 83.

[0103] Thus, the second guide rail 63 provides stable motion guidance for the second mounting plate 30, and the second grating ruler 83 and the second reading head 84 detect the displacement of the second mounting plate 30 in real time, providing accurate data for the control of the linear motor platform 100, so as to facilitate subsequent motion control.

[0104] Specifically, the second grating ruler 83 is arranged parallel to the second guide rail 63 to ensure that when the second mounting plate 30 slides along the second guide rail 63, the displacement change of the second mounting plate 30 detected by the second grating ruler 83 is consistent with the actual displacement of the second mounting plate 30 on the second guide rail 63, avoiding measurement errors caused by installation deviations. The second reading head 84 can be rigidly connected to the side of the second mounting plate 30 through a bracket. The movement direction of the second reading head 84 is perpendicular to that of the second guide rail 63, so that when the second mounting plate 30 slides along the second guide rail 63, the second reading head 84 can stably and accurately read the displacement information on the second grating ruler 83.

[0105] Optionally, along the first horizontal direction Y, the second grating ruler 83 and the second motor stator 721 are respectively disposed on both sides of the second mounting plate 30, and the second reading head 84 and the second motor mover 722 are respectively disposed on both sides of the first mounting plate 20.

[0106] Based on the hollow structure of the linear motor platform 100, the second grating ruler 83 and the second motor stator 721 are arranged symmetrically on both sides of the second mounting plate 30, and the second reading head 84 and the second motor mover 722 are arranged symmetrically on both sides of the first mounting plate 20. This arrangement allows the linear motor platform 100 to maintain a better balance during movement, and the overall structure of the linear motor platform 100 is more compact.

[0107] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A linear motor platform, characterized in that, include: The base has a first through hole along the vertical direction; A first mounting plate is connected to the base. The first mounting plate is movable relative to the base in a first horizontal direction. The first mounting plate has a second through hole in the vertical direction that communicates with the first through hole. The second mounting plate is disposed on the side of the first mounting plate away from the base. The second mounting plate is movable relative to the first mounting plate in a second horizontal direction. The second mounting plate has a third through hole in the vertical direction that communicates with the second through hole. The area of ​​the first through hole is smaller than the area of ​​the second through hole, the area of ​​the second through hole is smaller than the area of ​​the third through hole, and there is always an overlapping area between the first through hole, the second through hole and the third through hole in the vertical direction.

2. The linear motor platform according to claim 1, characterized in that, Along the first horizontal direction, the size of the second through hole is larger than the size of the first through hole, and the size of the third through hole is greater than or equal to the size of the second through hole; Along the second horizontal direction, the size of the second through hole is greater than or equal to the size of the first through hole, and the size of the third through hole is greater than the size of the second through hole.

3. The linear motor platform according to claim 2, characterized in that, The first through hole, the second through hole, and the third through hole are all square holes; or, the first through hole, the second through hole, and the third through hole are all round holes.

4. The linear motor platform according to any one of claims 1-3, characterized in that, The linear motor platform includes a first limiting component and a second limiting component. The first limiting component includes a first limiting block, which is disposed on the base. The first limiting block is used to limit the displacement of the first mounting plate along the first horizontal direction. The second limiting component includes a second limiting block, which is disposed on the first mounting plate and is used to limit the displacement of the second mounting plate along the second horizontal direction.

5. The linear motor platform according to any one of claims 1-3, characterized in that, The linear motor platform also includes a first displacement sensor and a second displacement sensor. The first displacement sensor is mounted on the base and is used to detect the amount of displacement of the first mounting plate relative to the base. The second displacement sensor is mounted on the first mounting plate and is used to detect the amount of displacement of the second mounting plate relative to the first mounting plate.

6. The linear motor platform according to any one of claims 1-3, characterized in that, The base is provided with a first guide rail extending along the first horizontal direction, and the first mounting plate is provided with a first sliding seat, which is slidably disposed on the first guide rail. The second mounting plate is provided with a second guide rail extending along the second horizontal direction, and the first mounting plate is provided with a second sliding seat on the side opposite to the first sliding seat, and the second sliding seat is slidably disposed on the second guide rail.

7. The linear motor platform according to claim 6, characterized in that, The linear motor platform also includes a first drive assembly and a second drive assembly; The first drive assembly includes a first motor stator and a first motor mover. The first motor stator is disposed on the base, and the first motor mover is disposed on the first mounting plate. The first motor mover is slidably disposed on the first motor stator. The second drive assembly includes a second motor stator and a second motor mover. The second motor stator is disposed on the second mounting plate, and the second motor mover is disposed on the side of the first mounting plate opposite to the first motor mover. The second motor mover is slidably disposed on the second motor stator.

8. The linear motor platform according to claim 7, characterized in that, The linear motor platform further includes a first grating ruler and a first reading head. The first grating ruler is disposed on the base, and the first reading head is disposed on the first mounting plate. The first grating ruler is used to detect the moving distance of the first mounting plate along the first horizontal direction, and the first reading head is used to read the value of the first grating ruler.

9. The linear motor platform according to claim 8, characterized in that, Along the second horizontal direction, the first grating ruler and the first motor stator are respectively disposed on both sides of the base, and the first reading head and the first motor mover are respectively disposed on both sides of the first mounting plate.

10. The linear motor platform according to claim 9, characterized in that, The linear motor platform also includes a second grating ruler and a second reading head. The second grating ruler is disposed on the second mounting plate, and the second reading head is disposed on the first mounting plate. The second grating ruler is used to detect the movement distance of the second mounting plate along the second horizontal direction, and the second reading head is used to read the value of the second grating ruler.

11. The linear motor platform according to claim 10, characterized in that, Along the first horizontal direction, the second grating ruler and the second motor stator are respectively disposed on both sides of the second mounting plate, and the second reading head and the second motor mover are respectively disposed on both sides of the first mounting plate.

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