Lifting fine adjustment table

Abstract

The invention 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] The present invention relates to the technical field of fine-tuning platforms, and in particular to a lifting fine-tuning platform. Background Art

[0002] The lifting fine adjustment platform is a displacement platform used to achieve vertical precision adjustment, and is commonly used in optical experiments, laser equipment, precision manufacturing and other fields. It controls the platform to move up and down by a small amount through screws, guide rails or electric mechanisms. It has the characteristics of stable structure, fine adjustment, and easy operation. It is suitable for working environments that require high positioning accuracy and stability. The following problems exist in the market: the current fine-tuning table, similar to the electric push cylinder on the market: with the same load demand, the volume is larger, the structure is complex, the assembly and maintenance are difficult, and the overall accuracy and stability are relatively poor; the market is similar to the single set of guide rails with symmetrical layout products, the overall accuracy and stability are relatively poor, and the ability to resist the lateral force in the installation direction of the vertical guide rail assembly is weak; The technical problem to be solved by the present invention is to provide a lifting fine-tuning platform with higher precision. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to provide a lifting and fine-tuning platform with high precision; the lifting and fine-tuning platform realizes the stable and controllable lifting of the bearing block in the vertical direction through the precise mechanical structure design, and has the characteristics of compact structure, high motion precision and good stability; its core structure is the sliding cooperation between the shell and the bearing block, and three slots are arranged at equal intervals along the circumferential direction inside the shell, and guide rails are embedded in the slots, one end of the guide rail is fixed to the shell, and the other end is connected to the bearing block to form a three-point guide system. This three-point support structure design can effectively avoid the bearing block from offsetting, skewing or shaking during the lifting process, and improves the lifting stability and repeated positioning accuracy.

[0004] A lifting and fine-tuning table comprises a shell, wherein a bearing block is provided inside the shell and cooperates with the bearing block for sliding up and down; and three slots are formed around the inside of the shell at equal intervals; and guide rails are provided inside the slots; and the fixed end of the guide rail is fixedly connected to the shell, and the sliding end of the guide rail is fixedly connected to the bearing block; and a driving mechanism is provided to enable the bearing block to reciprocate up and down.

[0005] Preferably, the driving mechanism includes a driving motor; and a pulley connected to the bottom of the supporting block is provided; and a connecting belt is wound around the rotating shaft of the driving motor and the pulley; and the driving motor drives the connecting belt to move, thereby driving the pulley to move.

[0006] Preferably, a rotating shaft connected to the pulley is also provided; and an axle seat threadedly connected to the rotating shaft is provided; and the axle seat is fixedly connected to the supporting block; the rotating shaft is driven to rotate by the forward and reverse motion of the driving motor and the pulley, so that the supporting block can achieve up and down reciprocating motion.

[0007] Preferably, a base is provided at the bottom of the shell; and a belt groove for accommodating a belt is formed on the base.

[0008] Preferably, the guide rail is a cross roller guide rail.

[0009] Preferably, adjacent guide rails are spaced 120 degrees apart.

[0010] Preferably, a loading platform fixedly connected to the loading block is provided on the top of the loading block.

[0011] Preferably, the outside of the shell is provided with a first optical coupler and a second optical coupler from top to bottom respectively; and a shading sheet is provided which moves up and down synchronously with the supporting block; and the round-trip points of the moving path of the shading sheet are the first optical coupler and the second optical coupler.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the lifting and fine-tuning platform of the present invention realizes the stable and controllable lifting of the bearing block in the vertical direction through the precise mechanical structure design, and has the characteristics of compact structure, high motion accuracy and good stability; its core structure is the sliding cooperation between the shell and the bearing block, and three slots are arranged at equal intervals along the circumference inside the shell, and guide rails are embedded in the slots, one end of the guide rail is fixed to the shell, and the other end is connected to the bearing block to form a three-point guide system. This three-point support structure design enables the bearing block to effectively avoid deviation, skewness or shaking during the lifting process, and improves the lifting stability and repeated positioning accuracy.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 The present invention Figure 1 Schematic diagram of the internal structure.

[0017] Figure 3 is the schematic diagram of the decomposition structure of the present invention Figure 1 .

[0018] Figure 4 is the schematic diagram of the sectional structure of the present invention Figure 1 .

[0019] Figure 5 is the schematic diagram of the light-shielding sheet structure of the present invention

[0020] In the figure: 1, housing; 2, carrier block; 3, slot; 4, guide rail; 5, drive motor; 6, pulley; 7, connecting belt; 9, rotating shaft member; 10, shaft seat; 11, base; 12, belt groove; 13, stage; 14, light-shielding sheet; 15, first optocoupler; 16, second optocoupler. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure.

[0023] Please refer to Figures 1 to 5 , in the embodiment of the present invention, a lifting fine-tuning table includes a housing 1; a carrier block 2 that is slidably engaged with the housing 1 up and down is provided inside the housing 1; and three slots 3 are formed equidistantly around the inside of the housing 1; and guide rails 4 are provided inside the slots 3; and the fixed ends of the guide rails 4 are fixedly connected to the housing 1, and the sliding ends of the guide rails 4 are fixedly connected to the carrier block 2; and a driving mechanism is provided to make the carrier block 2 reciprocate up and down.

[0024] Specifically, the lifting and fine-tuning platform realizes the stable and controllable lifting of the bearing block 2 in the vertical direction through the precise mechanical structure design, and has the characteristics of compact structure, high motion precision and good stability; its core structure is the sliding cooperation between the shell 1 and the bearing block 2, and three slots 3 are arranged at equal intervals along the circumferential direction inside the shell 1, and the guide rail 4 is embedded in the slot 3. One end of the guide rail 4 is fixed to the shell 1, and the other end is connected to the bearing block 2 to form a three-point guide system. This three-point support structure design enables the bearing block 2 to effectively avoid deviation, skewness or shaking during the lifting process, and improves the stability and repeated positioning accuracy of the lifting. The guide rail 4 structure also effectively disperses the load on the bearing block 2 and enhances the bearing capacity of the overall device. Driven by the drive mechanism, such as screw drive, electric push rod, stepper motor linkage, etc., the lifting and lowering control of the bearing block 2 with micron level or higher precision can be achieved. The linkage between the drive mechanism and the guide structure ensures that the components are evenly stressed during the lifting process, without jamming or shaking, thereby meeting the use requirements of high-precision positioning and adjustment. In addition, the entire mechanism has a simple and compact structure, is easy to process and assemble, and is suitable for applications in the fields of precision optics, laser adjustment, micro-nano processing, precision measurement platforms, laboratory equipment, etc. In actual use, the drive module can be automatically upgraded as needed to achieve electronic control or closed-loop feedback control, further improving the convenience of operation and the level of precision control.

[0025] Furthermore, the driving mechanism includes a driving motor 5; and a pulley 6 connected to the bottom of the supporting block 2 is provided; and a connecting belt 7 is wound around the rotating shaft of the driving motor 5 and the pulley 6; and the connecting belt 7 is driven to move by the driving motor 5, thereby driving the pulley 6 to move.

[0026] Specifically, the driving motor 5 is installed on one side or the bottom of the housing 1 as a power source, and its output shaft is connected to the pulley 6 provided at the bottom of the bearing block 2 through a flexible connecting belt 7. When the motor rotates, the connecting belt 7 runs accordingly, driving the pulley 6 to rotate, thereby realizing the vertical lifting movement of the bearing block 2 through the rigid connection with the bearing block 2 or the internal spiral lifting structure; preferably, the driving motor 5 can be selected with a common encoder motor for real-time position feedback; or with an absolute encoder motor with a memory position function; the brake motor can have a power-off lock protection function, etc.

[0027] Furthermore, a rotating shaft member 9 connected to the pulley 6 is provided; and an axle seat 10 threadedly connected to the rotating shaft member 9 is provided; and the axle seat 10 is fixedly connected to the supporting block 2; through the forward and reverse motion of the driving motor 5 and the pulley 6 driving the rotating shaft member 9 to rotate, the supporting block 2 can realize up and down reciprocating motion.

[0028] Specifically, the forward and reverse movement of the drive motor 5 drives the connecting belt 7 to run. The connecting belt 7 pulls the pulley 6 to rotate, and the pulley 6 drives the rotating shaft member 9 to rotate accordingly. Since the rotating shaft member 9 and the shaft seat 10 are in a threaded fit, the rotation of the rotating shaft member 9 will form an axial displacement push, thereby driving the bearing block 2 fixedly connected to the shaft seat 10 to achieve reciprocating up and down movement. The key to this structure lies in using screw drive to convert rotational motion into a linearly controllable motion. First, the screw pair drive has an extremely small pitch, so it can achieve micron-level or even sub-micron-level vertical displacement through very fine angular displacement, meeting the high-precision adjustment requirements. Second, since the screw mechanism (using the T-shaped screw in the screw-type lead screw) has good self-locking performance, 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. Third, there are no obvious gaps or impacts during the transmission process of this structure, and the movement is more stable, making it suitable for high-demand experimental environments such as laser alignment, micro-manipulation, micro-nano manufacturing, etc. In addition, the threaded connection pair composed of the rotating shaft member 9 and the shaft seat 10 is modularly designed, facilitating users to replace or optimize according to different stroke, load, or transmission accuracy requirements, enhancing the scalability and customization ability of the equipment.

[0029] Furthermore, the guide rail 4 adopts a crossed roller guide rail 4.

[0030] Specifically, in the structure of this lifting fine-tuning table, a crossed roller guide rail 4 is further adopted as the guiding mechanism, which is a significant optimization of the traditional guide rail 4 system, significantly improving the running accuracy, stability, and anti-eccentric load capacity of the bearing block 2 during the lifting process. The crossed roller guide rail 4 is composed of a V-shaped or U-shaped track and precision rollers. The rollers are arranged in a 90-degree cross pattern in the track, alternately bearing loads from all directions. Compared with ordinary linear sliding rails, it has higher guiding accuracy and motion rigidity. In this lifting platform, a crossed roller guide rail 4 is installed in each of the three slots 3. Its fixed end is connected to the housing 1, and the sliding end is connected to the bearing block 2, thereby realizing high-precision and low-friction lifting guiding support. After combining with high-precision transmission mechanisms such as the drive motor 5, pulley 6, and rotating shaft screw pair, the crossed roller guide rail 4 further enhances the structural rigidity and dynamic response ability of the entire platform, making the lifting motion not only smooth but also have good repeatability and durability. Especially in scenarios such as optical focusing platforms, laser processing Z-axis modules, and precision measurement equipment, a high-precision guiding mechanism is the basic guarantee for achieving precise control. The introduction of the crossed roller guide rail 4 enables this lifting fine-tuning table to be competent for higher-end industrial and scientific research applications, laying a solid mechanical foundation for achieving nano-level and sub-micron-level vertical displacement control, and is one of the key designs indispensable for improving the comprehensive performance of the system; The pioneering invention breaks the traditional installation method of complete sets of crossed roller guides and utilizes the basic mechanical principle that a triangle has stability. It uses 1.5 sets of crossed roller guides and is designed with a 120° uniform distribution, thus achieving high stability, high strength, resistance to lateral impact, reduction of motion yaw, and ensuring the straightness of vertical motion.

[0031] Furthermore, a base 11 is provided at the bottom of the housing 1; and a belt groove 12 for accommodating the connecting belt 7 is formed on the base 11.

[0032] 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 structural stability and integration but also optimizes the layout and operating stability of the belt drive system. Specifically, the base 11, as the lowest basic structure of the entire device, undertakes multiple functions such as supporting the housing 1, fixing internal components, dispersing the load-bearing weight, and absorbing motion vibration; it is integrally formed with the housing 1 or firmly connected by fasteners to ensure the rigidity and geometric stability of the overall framework. The formation of the belt groove 12 on the surface of the base 11 is a refined structural planning for the installation space and movement path of the belt drive system. The setting of the belt groove 12, on the one hand, provides a clear physical trajectory for the arrangement of the connecting belt 7, enabling the connecting belt 7 to maintain a fixed operating posture during movement and avoiding phenomena such as snake-like swinging and deviation from the pulley, thereby improving the meshing stability and efficiency between the belt pulley 6 and the connecting belt 7; on the other hand, the belt groove 12 also effectively reduces the exposed area of the connecting belt 7, playing a certain protective role and reducing problems such as jamming, wear, or belt skipping caused by dust and debris entering, improving the overall operating reliability and service life of the device. In addition, the groove 3 can also be custom-formed according to the size of the connecting belt 7 to ensure an appropriate clearance fit between the connecting belt 7 and the groove wall, enabling the connecting belt 7 to maintain good tension and rotational performance under high-frequency reciprocating motion.

[0033] Furthermore, the adjacent guide rails 4 are spaced 120 degrees apart.

[0034] Specifically, in the design of this lifting and fine-tuning table, the three guide rails 4 are further equidistantly arranged in a 120-degree symmetric distribution, which is an important structural optimization measure that takes into account mechanical balance, motion stability, and space utilization efficiency. Specifically, the three guide rails 4 are respectively arranged on the inner wall surface of the housing 1 and are equidistantly distributed around the bearing block 2 in a circumferential manner. The included angle between every two adjacent guide rails 4 is 120 degrees. This symmetric 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.

[0035] First, from a mechanical perspective, three-point support is one of the most basic and stable support methods in a rigid body structure. Distributing the guide rails 4 symmetrically at 120 degrees can achieve automatic balance of the torque exerted on the load-bearing block 2 during vertical lifting, effectively avoiding problems such as tilting and yaw caused by gravity eccentricity or local loads. Each guide rail 4 evenly shares the weight of the load-bearing block 2 and external loads, and always maintains the same direction and slides collaboratively during movement, ensuring that the translation path of the load-bearing block 2 is accurate and free of jitter. Second, from the perspective of motion accuracy, the layout of the guide rails 4 evenly distributed at 120 degrees can ensure that no deflection torque is generated during the lifting process. Especially when using cross-roller guide rails 4 with high rigidity and high precision, this structural layout can further exert the guiding performance of the guide rails 4, preventing the situation where one side is under greater force and the other side is under less force due to uneven distribution between the guide rails 4, and avoiding the amplification of small deviations into platform tilting or jamming problems, thus making the overall motion process smoother, more accurate, and controllable; ensuring that the lateral torsional force generated under high-load vertical motion can be effectively and reliably dispersed and borne by the cross-roller guide rails 4, so as to ensure that the guide rails 4 will not be damaged by indentation due to overload, the installation screws are under stable force and will not cause the guide rails 4 to shift and generate gaps, and stabilizing the originally designed and assembled motion gaps and precision.

[0036] Furthermore, a load platform 13 fixedly connected to the top of the load-bearing block 2 is provided.

[0037] Specifically, in the structure of this lifting fine-tuning table, a load platform 13 is further provided and fixedly connected to the top of the load-bearing block 2, which is one of the key components for realizing the function output and application expansion of the device. The load platform 13, as a platform directly used to place, install, or connect the object to be adjusted, usually has certain requirements for rigidity and precision. The fixed connection method (such as screw fastening, positioning pin fitting, or integral molding) between it and the load-bearing block 2 not only ensures the firmness of the structural connection and the overall rigidity, but also ensures the motion transfer accuracy of the platform during lifting, avoiding positioning errors or vibration displacements caused by loose connections. Through this connection structure, the displacement accuracy and stability during the entire lifting process can be effectively extended to the load platform body, thereby providing high-precision and good-repeatability vertical adjustment support for the installed object.

[0038] Furthermore, a first optocoupler 15 and a second optocoupler 16 are respectively provided on the outside of the housing 1 from top to bottom; a light-shielding sheet 14 that moves up and down synchronously with the load-bearing block 2 is provided; and the round-trip points of the moving path of the light-shielding sheet 14 are the first optocoupler 15 and the second optocoupler 16.

[0039] Specifically, the first optocoupler and the second optocoupler are respectively the highest point and the lowest point; when the first optocoupler and the second optocoupler detect the light-shielding sheet, they feedback to the control structure; these two points are the limit points, and the middle is the active range; and the lowest point is the initial origin.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

Claims

1. A lifting fine-tuning table, comprising a housing (1), characterized in that, Inside the housing (1), there is a bearing block (2) which is slidably engaged with it up and down; and three slots (3) are formed equidistantly around the inside of the housing (1); and guide rails (4) are provided inside the slots (3); and the fixed ends of the guide rails (4) are fixedly connected to the housing (1), and the sliding ends of the guide rails (4) are fixedly connected to the bearing block (2); and a driving mechanism is provided to make the bearing block (2) reciprocate up and down.

2. The lifting fine-tuning table according to claim 1, wherein The driving mechanism includes a driving motor (5); and a pulley (6) is provided at the bottom of the bearing block (2) and connected to it; and a connecting belt (7) is wound between the rotating shaft of the driving motor (5) and the pulley (6); and the driving motor (5) drives the connecting belt (7) to move, thereby driving the pulley (6) to move.

3. The lifting fine-tuning table according to claim 2, wherein A rotating shaft member (9) connected to the pulley (6) is also provided; and a shaft seat (10) threadedly connected to the rotating shaft member (9) is provided; and the shaft seat (10) is fixedly connected to the bearing block (2); through the forward and reverse rotation of the driving motor (5), and the pulley (6) drives the rotating shaft member (9) to rotate, so that the bearing block (2) realizes reciprocating up and down movement.

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

5. The lifting fine-tuning table according to claim 1, wherein The guide rail (4) adopts a crossed roller guide rail (4).

6. The lifting fine-tuning table according to claim 1, characterized in that The adjacent guide rails (4) are separated by 120 degrees.

7. The lifting fine-tuning table according to claim 1, wherein, A load platform (13) fixedly connected to it is provided at the top of the bearing block (2).

8. A lifting fine-tuning table according to claim 1, characterized in that, A first opto-coupler (15) and a second opto-coupler (16) are respectively provided from top to bottom on the outside of the housing (1); and a light-shielding sheet (14) that moves up and down synchronously with the bearing block (2) is provided; and the turning points of the moving path of the light-shielding sheet (14) are the first opto-coupler (15) and the second opto-coupler (16).

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