A micro-z-axis positioning platform

Abstract

The utility model discloses a micro Z axis positioning platform applied to the field of positioning platform, through setting up the vertical board of convertible installation mode and follow -up clamping plate, strengthen the adaptability of lifting piece to different size object to be measured, when the object size is small, vertical installation is installed to the vertical board, and follow -up clamping plate carries out conventional clamping restraint through rotating screw rod, when the object size exceeds this range, can place the vertical board horizontally, and select different spare screw hole to install screw rod, thereby enlarging the clamping range, in addition, the magnetic sliding block structure in the sliding groove replaces the fixed spare screw hole, through the cooperation of screw rod and magnetic sliding block, the adjustment of clamping distance is convenient, overcomes the adjustment limitation of fixed screw hole spacing, and the magnetic attraction ensures the position stability of magnetic sliding block under the non -adjustment state, and also allows through manual exertion external force to make it smooth in the sliding groove, thereby carries out fine position adjustment.

Description

Technical Field

[0001] This utility model relates to the field of positioning platforms, and in particular to a miniature Z-axis positioning platform. Background Technology

[0002] With continuous breakthroughs in cutting-edge technologies such as micro-nano fabrication, precision optical inspection, and biomedical engineering, the performance requirements for miniaturized positioning systems are constantly increasing. In submicron or even nanoscale operations, such as micro-nano repair of integrated circuits, cell-level microinjection, or fiber-optic coupling alignment, not only is extremely high positioning accuracy required, but the equipment must also achieve multi-degree-of-freedom motion control within a limited space. While XY-axis planar positioning platforms have become relatively mature, a compact and stable Z-axis positioning mechanism is indispensable for performing three-dimensional spatial positioning or requiring precise vertical alignment.

[0003] The prior art CN201410784696.1 discloses a Z-axis positive magnification one-dimensional precision positioning platform, which has the advantages of large stroke range, high precision, simple structure, small size, high rigidity, high sensitivity, extremely high resolution, nanometer scale, and suitability as a micro-motion platform.

[0004] The prior art CN201510383121.3 discloses a Z-axis approximation mechanism, which realizes Z-axis movement through a Z-axis motion device and adjusts the angle through an angle adjustment device, thereby achieving precise positioning of the LED chip in space.

[0005] In the aforementioned existing technologies, Z-axis positioning platforms either employ electromagnetic drive, which achieves positioning through the interaction of electromagnets and coils, but these methods are bulky and difficult to design compactly; or they use piezoelectric drive, which utilizes the properties of piezoelectric materials to achieve micro-displacement, offering high precision and fast response, but with limited stroke. Furthermore, while cross-roller guides are used to improve guiding accuracy, traditional designs are often bulky. In addition, the platform surface lacks a flexible clamping constraint structure, making it prone to shaking of objects on the platform surface due to motor vibration during vertical lifting, thus affecting positioning accuracy. Utility Model Content

[0006] The core of this invention lies in enhancing the adaptability of the lifting block to objects of different sizes by setting up a vertical plate and a follow-up clamping plate with interchangeable installation methods, thus solving the problem of insufficient lifting stability caused by the lack of a constraint structure on the surface of the lifting platform in the prior art. At the same time, the platform is compactly designed by using a voice coil motor and annular elastic sheet, and the operation precision of adjusting the constraint is improved by using a magnetic slider and a sliding groove.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A miniature Z-axis positioning platform includes a housing. Inside the housing, a miniature ball bearing guide and symmetrically arranged voice coil motors are installed. The output end of the voice coil motors is connected to a lifting block slidably connected to the miniature ball bearing guide. Inside the housing, annular elastic plates are symmetrically arranged with respect to the lifting blocks, located above the voice coil motors, with their surfaces in contact with the surfaces of the lifting blocks. Inside the housing, a reader is installed below the lifting blocks. The top of the housing has insertion slots symmetrically arranged with respect to the lifting blocks, into which limit blocks are inserted. A vertical plate is fixedly installed on the top of the limit blocks, and a threaded rod is threaded into the internal threads of the vertical plate. The tail end of the threaded rod is connected to a follower clamping plate via a rotating assembly. Positioning blocks are installed on both outer walls of the housing. The side surface of the positioning blocks facing away from the housing has a constraint slot that matches the limit block. A magnetic slot is provided at the bottom of the follower clamping plate.

[0009] Furthermore, the rotating assembly includes a through groove formed on the surface of the follower clamp near the vertical plate, and the inner wall of the through groove is coated with a magnetic coating. The tail end of the threaded rod is connected to a magnetic block that attracts the magnetic coating.

[0010] Furthermore, the diameter of the through slot is the same as the diameter of the magnetic slot, and the magnetic slot and the magnetic block attract each other.

[0011] Furthermore, the interior of the upright plate has several spare screw holes that match the threaded rod, and the diameter of the spare screw holes is larger than the diameter of the magnetic block.

[0012] Furthermore, the top of the lifting block is provided with several positioning slots of different diameters, and the reader consists of a miniature reading head and a grating ruler.

[0013] Optionally, the upright plate has a groove inside, and a magnetic slider is slidably connected inside the groove. The magnetic slider has a threaded hole inside that matches the threaded rod.

[0014] Furthermore, the inner wall of the slide is equipped with a magnetic plate that attracts the magnetic slider, and both the magnetic slider and the slide have a cross-shaped cross section.

[0015] Compared with existing technologies, the advantages of this utility model are: (1) This solution enhances the adaptability of the lifting block to objects of different sizes by setting up a vertical plate and a follower clamping plate with interchangeable installation methods. When the object size is small, the vertical plate is installed vertically, and the follower clamping plate is clamped and constrained in a conventional manner by rotating the threaded rod. When the object size exceeds this range, the vertical plate can be placed horizontally, and different spare screw holes can be selected to install the threaded rod, thereby expanding the clamping range. In addition, the magnetic connection method ensures a reliable connection between the follower clamping plate and the threaded rod without hindering the rotation of the threaded rod, ensuring the normal realization of the clamping adjustment function, enabling the platform to flexibly cope with work of various sizes, and improving the convenience of use.

[0016] (2) This solution replaces the fixed spare screw hole with a magnetic slider structure in the slide groove. The clamping distance can be easily adjusted by the cooperation of the threaded rod and the magnetic slider, which overcomes the adjustment limitation caused by the fixed screw hole spacing. The magnetic attraction not only ensures the position stability of the magnetic slider in the non-adjustment state, but also allows it to move smoothly in the slide groove by manually applying external force, thereby making fine position adjustment, which improves the versatility and operation accuracy of this application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall appearance of the present utility model; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 For the present utility model Figure 2 Enlarged diagram of point A in the diagram; Figure 4 This is a structural diagram of the threaded rod and magnetic block of this utility model; Figure 5 This is a schematic diagram of the working state of the vertical plate inserted into the positioning block and the follower clamping plate of this utility model. Figure 6 This is a structural diagram of the upright plate, the sliding groove, and the magnetic slider of this utility model; Figure 7 This is a schematic diagram showing the state of the threaded rod of this utility model moving along the slide groove through the interior of the magnetic slider.

[0018] Explanation of the labels in the diagram: 1. Outer shell; 2. Annular elastic sheet; 3. Miniature ball bearing guide rail; 4. Reader; 5. Lifting block; 6. Voice coil motor; 7. Vertical plate; 71. Spare screw hole; 72. Slide groove; 73. Magnetic slider; 8. Threaded rod; 9. Follower clamp; 10. Insertion slot; 11. Positioning block; 12. Constraint slot; 13. Magnetic slot; 14. Magnetic block; 15. Positioning groove. Detailed Implementation

[0019] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0020] Example 1: Please see Figures 1-4 A miniature Z-axis positioning platform includes a housing 1. Inside the housing 1, a miniature ball bearing guide rail 3 and symmetrically arranged voice coil motors 6 are installed. The output end of the voice coil motors 6 is connected to a lifting block 5 slidably connected to the miniature ball bearing guide rail 3. Inside the housing 1, annular elastic plates 2 are symmetrically arranged about the lifting block 5. The annular elastic plates 2 are located above the voice coil motors 6 and their surfaces are in contact with the surfaces of the lifting blocks 5. Inside the housing 1, a reader 4 is installed below the lifting block 5. The top of the housing 1 has insertion slots 10 symmetrically arranged about the lifting block 5. Limiting blocks are inserted into the insertion slots 10. A vertical plate 7 is fixedly installed on the top of the limiting blocks. A threaded rod 8 is threaded inside the vertical plate 7. The tail end of the threaded rod 8 is connected to a follower clamping plate 9 through a rotating assembly. Positioning blocks 11 are installed on both outer walls of the housing 1. The side surface of the positioning block 11 facing away from the housing 1 has a constraint slot 12 that matches the limiting block. A magnetic slot 13 is provided at the bottom of the follower clamping plate 9.

[0021] The rotating assembly includes a through groove on the surface of the follower clamp 9 near the vertical plate 7, and the inner wall of the through groove is coated with a magnetic coating. The tail end of the threaded rod 8 is connected to a magnetic block 14 that attracts the magnetic coating.

[0022] The diameter of the through slot is the same as the diameter of the magnetic slot 13, and the magnetic slot 13 and the magnetic block 14 attract each other.

[0023] Please see Figure 1 The interior of the upright plate 7 has several spare screw holes 71 that match the threaded rod 8, and the diameter of the spare screw holes 71 is larger than the diameter of the magnetic block 14.

[0024] The top of the lifting block 5 is provided with several positioning slots 15 of different diameters, and the reader 4 consists of a miniature reading head and a grating ruler.

[0025] Specifically, during the positioning operation, the voice coil motor 6 drives the lifting block 5 to move vertically along the miniature ball bearing guide rail 3. During the lifting process of the lifting block 5, the annular elastic sheet 2 is used for constraint treatment, which can achieve stable lifting of the lifting block 5. During this process, the reader 4 (the miniature reading head and the grating ruler are existing technologies, and their working principle will not be described in detail) is used to read the lifting distance of the lifting block 5. During the lifting, the annular elastic sheet 2 can provide a corresponding constraint effect on the lifting block 5.

[0026] Before using the lifting block 5 for lifting and positioning, if the size of the object to be tested is smaller than the distance between the two follower clamps 9, the rotation of the threaded rod 8 will cause the follower clamps 9 to move closer, constraining and clamping the object to be tested. This ensures that the object is constrained and stable during the lifting process. If the size of the object to be tested is larger than the distance between the two follower clamps 9, the upright plate 7 needs to be pulled upwards, and the insertion relationship between the limit block and the constraint slot 12 will allow the upright plate 7 to be placed in a horizontal position (e.g., ...). Figure 5 (As shown), then select a suitable spare screw hole 71 according to the size of the object to be tested, insert the threaded rod 8 into the spare screw hole 71 at the corresponding position, and when the threaded rod 8 extends out of the top of the horizontal plate 7, connect the magnetic slot 13 at the bottom of the follower clamp 9 with the magnetic block 14 at the tail end of the threaded rod 8 to form a constraint. If the vertical size of the object to be tested is large, the threaded rod 8 can be rotated to drive the follower clamp 9 to move upward, so as to achieve a better constraint and limiting effect.

[0027] During the above operation, since the magnetic block 14 is magnetically connected to the magnetic slot 13 and the through slot, but this does not affect the rotation operation of the magnetic block 14 within it, the threaded rod 8 can drive the follower clamp 9 to perform corresponding movement operations when it rotates without changing the placement state of the follower clamp 9.

[0028] Specifically, the use of positioning slot 15 enables the micro XY positioning platform to be integrated with this positioning platform through plug-in connection, thereby assisting in the realization of three-axis positioning operation.

[0029] Example 2: Please see Figure 6 The interior of the upright plate 7 is provided with a groove 72, and a magnetic slider 73 is slidably connected inside the groove 72. The magnetic slider 73 is provided with a threaded hole that matches the threaded rod 8.

[0030] The inner wall of the slide 72 is equipped with a magnetic plate that attracts the magnetic slider 73, and both the magnetic slider 73 and the slide 72 have a cross-shaped cross section.

[0031] Specifically, in Embodiment 1, when the size of the object to be tested is greater than the distance between the two upright plates 7, the adjustment of the spare screw hole 71 is limited. To address this problem, this embodiment is adopted for improvement. In this embodiment, the spare screw hole 71 is replaced by a combination design of a sliding groove 72 and a magnetic slider 73.

[0032] When adjustment is needed, the threaded connection between the threaded rod 8 and the magnetic slider 73 can be used to push the follower clamp 9. When further fine-tuning the constraint distance between the follower clamp 9 and the object to be tested is required, the threaded rod 8 can be manually moved horizontally to overcome the magnetic attraction between the magnetic slider 73 and the groove 72, thus achieving the corresponding spacing adjustment effect (e.g., ...). Figure 7 (As shown).

[0033] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A miniature Z-axis positioning platform, comprising a housing (1), characterized in that: The housing (1) contains a miniature ball bearing guide rail (3) and symmetrically arranged voice coil motors (6). The output end of the voice coil motor (6) is connected to a lifting block (5) that is slidably connected to the miniature ball bearing guide rail (3). The housing (1) contains annular elastic plates (2) symmetrically arranged about the lifting block (5). The annular elastic plates (2) are located above the voice coil motor (6) and their surfaces are in contact with the surfaces of the lifting blocks (5). The housing (1) contains a reader (4) located below the lifting blocks (5). The top of the housing (1) contains... A symmetrically arranged insertion slot (10) is provided about the lifting block (5). A limit block is inserted into the insertion slot (10), and a vertical plate (7) is fixedly installed on the top of the limit block. A threaded rod (8) is installed inside the vertical plate (7). The tail end of the threaded rod (8) is connected to a follower clamp (9) through a rotating assembly. Positioning blocks (11) are installed on both outer walls of the outer shell (1). A constraint slot (12) matching the limit block is opened on the side surface of the positioning block (11) away from the outer shell (1). A magnetic suction slot (13) is opened at the bottom of the follower clamp (9).

2. The miniature Z-axis positioning platform according to claim 1, characterized in that: The rotating assembly includes a through groove on the surface of the follower clamp (9) near the upright plate (7), and the inner wall of the through groove is coated with a magnetic coating. The tail end of the threaded rod (8) is connected to a magnetic block (14) that attracts the magnetic coating.

3. A miniature Z-axis positioning platform according to claim 2, characterized in that: The diameter of the through slot is the same as the diameter of the magnetic slot (13), and the magnetic slot (13) and the magnetic block (14) attract each other.

4. A miniature Z-axis positioning platform according to claim 2, characterized in that: The interior of the upright plate (7) is provided with several spare screw holes (71) that match the threaded rod (8), and the diameter of the spare screw holes (71) is larger than the diameter of the magnetic block (14).

5. A miniature Z-axis positioning platform according to claim 1, characterized in that: The top of the lifting block (5) is provided with several positioning slots (15) of different diameters, and the reader (4) is composed of a miniature reading head and a grating ruler.

6. A miniature Z-axis positioning platform according to claim 1, characterized in that: The interior of the upright plate (7) is provided with a sliding groove (72), and a magnetic slider (73) is slidably connected inside the sliding groove (72). The interior of the magnetic slider (73) is provided with a threaded hole that matches the threaded rod (8).

7. A miniature Z-axis positioning platform according to claim 6, characterized in that: The inner wall of the slide (72) is equipped with a magnetic plate that attracts the magnetic slider (73), and the cross sections of the magnetic slider (73) and the slide (72) are both cross-shaped.

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