Lifting fine adjustment table

Abstract

The utility model relates to the technical field of fine adjustment tables, and discloses a lifting fine adjustment table which comprises a shell, and a bearing block in up-down sliding fit with the shell is arranged in the shell. Three groove positions are formed in the shell in a surrounding mode at equal intervals. Guide rails are arranged in the slots; the fixed end of the guide rail is fixedly connected with the shell, and the sliding end of the guide rail is fixedly connected with the bearing block. A driving mechanism is arranged to enable the bearing block to reciprocate up and down; through precise mechanical structure design, stable and controllable lifting of the bearing block in the vertical direction is achieved, and the lifting mechanism has the advantages of being compact in structure, high in movement precision and good in stability. According to the core structure, a shell is in sliding fit with a bearing block, three groove positions are formed in the shell in the circumferential direction at equal intervals, guide rails are embedded in the groove positions, one ends of the guide rails are fixed to the shell, the other ends of the guide rails are connected with the bearing block, and a three-point guide system is formed. Due to the three-point supporting structure design, the bearing block can be effectively prevented from deviating, inclining or shaking in the lifting process, and the precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of fine-tuning stage technology, and specifically to a lifting fine-tuning stage. Background Technology

[0002] A lifting fine-tuning stage is a displacement platform used for precise vertical adjustment, commonly found in optical experiments, laser equipment, and precision manufacturing. It controls the platform's micro-movements via screws, guide rails, or electric mechanisms, offering features such as structural stability, precise adjustment, and ease of operation. It is suitable for working environments requiring high positioning accuracy and stability.

[0003] The following problems exist in the current market: The existing fine-tuning stage, similar to the electric push cylinder, has a larger volume, more complex structure, greater difficulty in assembly and maintenance, and relatively poor overall accuracy and stability for the same load requirements; similar products with a symmetrical layout of a single set of guide rails have relatively poor overall accuracy and stability, and are weak in resisting lateral forces in the installation direction of the vertical guide rail components.

[0004] The technical problem to be solved by this utility model is to provide a high-precision lifting and fine-tuning stage. Utility Model Content

[0005] The technical problem this invention addresses is: providing a high-precision lifting and fine-tuning platform. This platform, through precise mechanical structure design, achieves smooth and controllable vertical lifting of the support block, featuring a compact structure, high motion precision, and good stability. Its core structure is a sliding fit between the housing and the support block. The housing has three equally spaced slots along its circumference, with guide rails embedded in these slots. One end of the guide rail is fixed to the housing, and the other end is connected to the support block, forming a three-point guiding system. This three-point support structure design effectively prevents the support block from shifting, tilting, or swaying during lifting, improving the stability and repeatability of the lifting process.

[0006] A lifting and fine-tuning platform includes a housing, inside which a support block is provided for sliding cooperation with it; and three slots are formed around the inside of the housing at equal intervals; and each slot is provided with a guide rail; and the fixed end of the guide rail is fixedly connected to the housing, and the sliding end of the guide rail is fixedly connected to the support block; and a driving mechanism is provided to make the support block reciprocate up and down.

[0007] Preferably, the drive mechanism includes a drive motor; and the bottom of the support block is provided with a pulley connected thereto; and a connecting belt is wound between the shaft of the drive motor and the pulley; and the drive motor drives the connecting belt to move, thereby driving the pulley to move.

[0008] Preferably, the device also includes a rotating shaft connected to a pulley; a shaft seat threadedly connected to the rotating shaft; and a fixed connection between the shaft seat and the bearing block; the bearing block achieves up-and-down reciprocating motion by the forward and reverse rotation of the drive motor and the rotation of the rotating shaft driven by the pulley.

[0009] Preferably, the bottom of the housing is provided with a base; and the base is formed with a belt groove for accommodating the belt.

[0010] Preferably, the guide rail is a cross roller guide rail.

[0011] Preferably, adjacent guide rails are spaced 120 degrees apart.

[0012] Preferably, the top of the support block is provided with a platform that is fixedly connected to it.

[0013] Preferably, the outer surface of the housing is provided with a first optical coupler and a second optical coupler from top to bottom; and a light-shielding plate is provided that moves up and down synchronously with the support block; and the round-trip points of the movement path of the light-shielding plate are the first optical coupler and the second optical coupler.

[0014] Compared with existing technologies, the advantages of this utility model are as follows: This utility model's lifting and fine-tuning platform, through precise mechanical structure design, achieves stable and controllable lifting of the support block in the vertical direction, featuring a compact structure, high motion precision, and good stability. Its core structure is a sliding fit between the shell and the support block. The shell has three equally spaced slots along its circumference, with guide rails embedded in these slots. One end of the guide rail is fixed to the shell, and the other end is connected to the support block, forming a three-point guiding system. This three-point support structure design effectively prevents the support block from shifting, tilting, or shaking during lifting, improving the stability and repeatability of the lifting process.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a utility model Figure 1 A schematic diagram of the internal structure.

[0019] Figure 3 This is a utility model Figure 1 A schematic diagram of its decomposed structure.

[0020] Figure 4 This is a utility model Figure 1 A schematic diagram of the cross-sectional structure.

[0021] Figure 5 This is a schematic diagram of the light-shielding sheet structure of this utility model.

[0022] In the figure: 1. Housing; 2. Bearing block; 3. Slot; 4. Guide rail; 5. Drive motor; 6. Pulley; 7. Connecting belt; 9. Rotating shaft; 10. Shaft seat; 11. Base; 12. Belt groove; 13. Stage; 14. Light shield; 15. First optocoupler; 16. Second optocoupler. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that the terms "first," "second," etc., used in this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with this disclosure.

[0025] Please see Figures 1-5 In this embodiment of the utility model, a lifting and fine-tuning platform includes a housing 1; the housing 1 has a bearing block 2 that slides and cooperates with it up and down; and the housing 1 has three slots 3 formed at equal intervals around it; and each slot 3 has a guide rail 4 inside; and the fixed end of the guide rail 4 is fixedly connected to the housing 1, and the sliding end of the guide rail 4 is fixedly connected to the bearing block 2; and a driving mechanism is provided to make the bearing block 2 move up and down reciprocally.

[0026] Specifically, this lifting and fine-tuning platform, through precise mechanical structure design, achieves smooth and controllable lifting of the support block 2 in the vertical direction, featuring a compact structure, high motion precision, and good stability. Its core structure is the sliding fit between the housing 1 and the support block 2. The housing 1 has three equally spaced slots 3 along its circumference, with guide rails 4 embedded in these slots. One end of the guide rail 4 is fixed to the housing 1, and the other end is connected to the support block 2, forming a three-point guiding system. This three-point support structure design effectively prevents the support block 2 from shifting, tilting, or shaking during lifting, improving the stability and repeatability of the lifting process. The guide rail 4 structure also effectively distributes the load on the support block 2, enhancing the overall load-bearing capacity of the device. Driven by a mechanism such as a lead screw drive, electric push rod, or stepper motor linkage, the lifting control of the support block 2 can achieve micron-level or higher precision. The linkage between the drive mechanism and the guiding structure ensures that all components are subjected to uniform force during lifting, preventing jamming or shaking, thus meeting the requirements for high-precision positioning and adjustment. Furthermore, the entire mechanism boasts a simple and compact structure, making it easy to manufacture and assemble, and suitable for applications in precision optics, laser modulation, micro-nano fabrication, precision measurement platforms, and laboratory equipment. In practical use, the drive module can be automated as needed to achieve electronic control or closed-loop feedback control, further improving operational convenience and precision control.

[0027] Furthermore, the drive mechanism includes a drive motor 5; and a pulley 6 connected to the bottom of the support block 2; and a connecting belt 7 is wound between the shaft of the drive motor 5 and the pulley 6; and the drive motor 5 drives the connecting belt 7 to move, thereby driving the pulley 6 to move.

[0028] Specifically, the drive motor 5, as the power source, is installed on one side or the bottom of the housing 1. Its output shaft is connected to the pulley 6 located at the bottom of the support block 2 via a flexible connecting belt 7. When the motor rotates, the connecting belt 7 runs accordingly, driving the pulley 6 to rotate, thereby achieving the vertical lifting movement of the support block 2 through a rigid connection with the support block 2 or an internal spiral lifting structure. Preferably, the drive motor 5 can be a motor with a common encoder for real-time position feedback; or a motor with an absolute encoder and position memory function; the brake motor can have a power-off lock-up protection function, etc.

[0029] Furthermore, a rotating shaft 9 connected to the pulley 6 is provided; and a bearing seat 10 threadedly connected to the rotating shaft 9 is provided; and the bearing seat 10 is fixedly connected to the bearing block 2; through the forward and reverse rotation of the drive motor 5, and the pulley 6 driving the rotating shaft 9 to rotate, the bearing block 2 can achieve up and down reciprocating motion.

[0030] Specifically, the forward and reverse rotation of the drive motor 5 drives the connecting belt 7, which in turn drives the pulley 6 to rotate. The pulley 6 then drives the rotating shaft 9 to rotate accordingly. Since the rotating shaft 9 and the bearing 10 are threadedly fitted, the rotation of the rotating shaft 9 creates axial displacement, thereby driving the bearing block 2, which is fixedly connected to the bearing 10, to reciprocate up and down. The key to this structure is the use of threaded transmission to convert rotational motion into highly controllable linear motion. Firstly, the threaded transmission has an extremely small pitch, thus enabling micron-level or even sub-micron-level vertical displacement through very minute angular displacements, meeting high-precision adjustment requirements. Secondly, due to the excellent self-locking performance of the threaded mechanism (using a T-type lead screw), even if the motor is powered off or stops running, the bearing block 2 will not slide down due to gravity, greatly improving the reliability and safety of the system. Thirdly, this structure has no obvious gaps or impacts during transmission, resulting in smoother movement, making it suitable for demanding experimental environments such as laser alignment, micromanipulation, and micro / nano manufacturing. In addition, the threaded connection pair formed by the rotating shaft 9 and the bearing seat 10 is modularly designed, allowing users to easily replace or optimize it according to different stroke, load, or transmission accuracy requirements, enhancing the scalability and customization capabilities of the equipment.

[0031] Furthermore, guide rail 4 adopts a cross roller guide rail 4.

[0032] Specifically, the structure of this lifting fine-tuning platform further utilizes a cross roller guide rail 4 as a guiding mechanism, representing a significant optimization of the traditional guide rail 4 system. This significantly improves the running accuracy, stability, and anti-eccentric load capacity of the load-bearing block 2 during the lifting process. The cross roller guide rail 4 is composed of V-shaped or U-shaped rails combined with precision rollers. The rollers are arranged in a 90-degree cross pattern within the rails, alternately bearing loads from various directions. Compared to ordinary linear guide rails, it possesses higher guiding accuracy and motion rigidity. In this lifting platform, one cross roller guide rail 4 is installed in each of the three sets of slots 3. Its fixed end is connected to the housing 1, and its sliding end is connected to the load-bearing block 2, thereby achieving high-precision, low-friction lifting guidance support. Combined with high-precision transmission mechanisms such as the drive motor 5, pulley 6, and rotating shaft threaded pair, the cross roller guide rail 4 further enhances the structural rigidity and dynamic response capability of the entire platform, making the lifting motion not only smooth and stable but also possessing good repeatability and durability. Especially in scenarios such as optical focusing platforms, laser processing Z-axis modules, and precision measuring equipment, high-precision guiding mechanisms are the fundamental guarantee for achieving precision control. The introduction of the cross roller guide 4 enables this lifting and fine-tuning stage to be competent in more advanced industrial and scientific research applications, laying a solid mechanical foundation for achieving nanometer-level and submicron-level vertical displacement control, and is one of the key designs that are indispensable for improving the overall performance of the system;

[0033] This invention innovatively breaks away from the traditional assembly method of cross roller guides, utilizing the fundamental mechanical principle of the stability of triangles. It employs 1.5 sets of cross roller guides, evenly distributed at 120° intervals, thus achieving high stability, high strength, resistance to lateral impacts, reduced sway, and ensuring the straightness of vertical movement.

[0034] Furthermore, the bottom of the housing 1 is provided with a base 11; and the base 11 is formed with a belt groove 12 for accommodating the connecting belt 7.

[0035] Specifically, a base 11 structure is provided at the bottom of the housing 1, and a belt groove 12 is formed on the base 11 to accommodate and guide the movement path of the connecting belt 7. This not only enhances the overall stability and integration of the structure, but also optimizes the layout and operational stability of the belt drive system. Specifically, the base 11, as the lowest foundation structure of the entire device, undertakes multiple functions such as supporting the housing 1, fixing internal components, distributing the load, and absorbing vibrations. It is integral with the housing 1 or firmly connected through fasteners, ensuring the rigidity and geometric stability of the overall frame. The belt groove 12 on the surface of the base 11 represents a refined structural plan for the installation space and movement path of the belt drive system. The belt groove 12 serves two purposes. First, it provides a clear physical trajectory for the connecting belt 7, ensuring it maintains a fixed running posture during operation and preventing serpentine swaying or deviation from the pulley. This improves the meshing stability and efficiency between the pulley 6 and the connecting belt 7. Second, the belt groove 12 effectively reduces the exposed area of ​​the connecting belt 7, providing some protection and minimizing problems such as jamming, wear, or belt skipping caused by dust and debris. This enhances the overall operational reliability and service life of the device. Furthermore, the groove 3 can be customized to fit the dimensions of the connecting belt 7, ensuring an appropriate clearance between the belt 7 and the groove wall. This allows the connecting belt 7 to maintain good tension and rotational performance even under high-frequency reciprocating motion.

[0036] Furthermore, the adjacent guide rails 4 are spaced 120 degrees apart.

[0037] Specifically, in the design of this lifting and fine-tuning platform, the three guide rails 4 are further arranged symmetrically at 120-degree intervals. This is an important structural optimization method that balances mechanical equilibrium, motion stability, and space utilization efficiency. Specifically, the three guide rails 4 are arranged on the inner wall of the housing 1 and are equidistantly distributed around the support block 2 in a circular manner. The included angle between each pair of adjacent guide rails 4 is 120 degrees. This symmetrical three-point support structure has good mechanical symmetry and support rigidity, which can significantly improve the guiding accuracy and load-bearing stability of the entire lifting system.

[0038] First, from a mechanical perspective, three-point support is one of the most basic and stable support methods in rigid structures. Distributing the guide rails 4 symmetrically at 120-degree intervals allows for automatic balance of the torque on the load-bearing block 2 during vertical lifting, effectively avoiding tilting or swaying caused by gravitational eccentricity or localized loads. Each guide rail 4 evenly distributes the weight and external load of the load-bearing block 2, maintaining consistent direction and coordinated sliding throughout the movement, ensuring precise and vibration-free translation of the load-bearing block 2. Secondly, from the perspective of motion accuracy, the 120-degree evenly distributed guide rails 4 ensure that no deflection torque is generated during the lifting process. Especially when using cross roller guide rails 4, which are high-rigidity and high-precision guide components, this structural layout can further enhance the guiding performance of the guide rails 4, prevent the situation where one side is subjected to greater force and the other side is subjected to less force due to uneven distribution between the guide rails 4, and avoid the small deviations being amplified into platform tilting or jamming problems, thereby making the overall motion process smoother, more accurate and controllable; it ensures that the lateral torsional force generated under high load vertical motion is effectively and reliably distributed to the cross roller guide rails 4, thus ensuring that the guide rails 4 are not overloaded and do not cause indentation damage, and that the installation screws are under stable force so as not to cause the guide rails 4 to shift and create gaps, and thus stabilize the motion gaps and accuracy of the original design and assembly.

[0039] Furthermore, the top of the support block 2 is provided with a platform 13 that is fixedly connected to it.

[0040] Specifically, in the structure of this lifting and fine-tuning platform, a loading platform 13 is further set and fixedly connected to the top of the support block 2. This is one of the key components for realizing the functional output and application expansion of the equipment. As a platform directly used for placing, installing, or connecting the object to be adjusted, the loading platform 13 usually has certain rigidity and precision requirements. It is fixedly connected to the support block 2 (such as screw fastening, positioning pin engagement, or integral molding), which not only ensures the firmness of the structural connection and the overall rigidity, but also ensures the motion transmission accuracy of the platform during the lifting process, avoiding positioning errors or vibration displacement caused by loose connections. Through this connection structure, the displacement accuracy and stability throughout the lifting process can be effectively extended to the loading platform body, thereby providing high-precision and repeatable vertical adjustment support for the installed object.

[0041] Furthermore, the outer surface of the housing 1 is provided with a first optical coupler 15 and a second optical coupler 16 from top to bottom; and a light-shielding plate 14 is provided that moves up and down synchronously with the support block 2; and the round-trip points of the moving path of the light-shielding plate 14 are the first optical coupler 15 and the second optical coupler 16.

[0042] Specifically, the first and second optical couplers are the highest and lowest points, respectively; when the first and second optical couplers detect the light-blocking plate, they feed back to the control structure; these two points are the limit points, and the middle is the range of activity; and the lowest point is the initial origin.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A lifting and fine-tuning stage, comprising a housing (1), characterized in that, The housing (1) has a bearing block (2) inside which it slides up and down; and the housing (1) has three slots (3) formed around it at equal intervals; and each slot (3) has a guide rail (4) inside; and the fixed end of the guide rail (4) is fixedly connected to the housing (1), and the sliding end of the guide rail (4) is fixedly connected to the bearing block (2); and a driving mechanism is provided to make the bearing block (2) move up and down.

2. The lifting and fine-tuning platform according to claim 1, characterized in that, The drive mechanism includes a drive motor (5); and a pulley (6) connected to the bottom of the support block (2); and a connecting belt (7) is wound between the shaft of the drive motor (5) and the pulley (6); and the drive motor (5) drives the connecting belt (7) to move, thereby driving the pulley (6) to move.

3. The lifting and fine-tuning platform according to claim 2, characterized in that, It is also provided with a rotating shaft (9) connected to the pulley (6); and a shaft seat (10) threadedly connected to the rotating shaft (9); and the shaft seat (10) is fixedly connected to the bearing block (2); by the forward and reverse rotation of the drive motor (5) and the pulley (6) driving the rotating shaft (9) to rotate, the bearing block (2) can achieve up and down reciprocating motion.

4. A lifting and fine-tuning platform according to claim 2, characterized in that, The bottom of the housing (1) is provided with a base (11); and the base (11) is formed with a belt groove (12) for accommodating the connecting belt (7).

5. A lifting and fine-tuning platform according to claim 1, characterized in that, The guide rail (4) adopts a cross roller guide rail (4).

6. A lifting and fine-tuning platform according to claim 1, characterized in that, The adjacent guide rails (4) are spaced 120 degrees apart.

7. A lifting and fine-tuning platform according to claim 1, characterized in that, The top of the support block (2) is provided with a platform (13) that is fixedly connected to it.

8. A lifting and fine-tuning platform according to claim 1, characterized in that, The outer side of the housing (1) is provided with a first optical coupler (15) and a second optical coupler (16) from top to bottom; and a light-shielding plate (14) is provided that moves up and down synchronously with the support block (2); and the round-trip points of the moving path of the light-shielding plate (14) are the first optical coupler (15) and the second optical coupler (16).

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