Multi-point leveling mechanism

Abstract

The utility model provides a multi-point leveling mechanism, the mechanism comprises a main platform deck and a leveling base plate which are parallel to each other, and also comprises a plurality of leveling components which are uniformly distributed on the lower surface of the leveling base plate, each leveling component comprises a limiting stud, a pressing module and a pre-pressing module, the pre-pressing module and the pressing module are sleeved on the limiting stud in sequence, and the pressing module and the pre-pressing module are fixed on the main platform deck. The tail end of the limiting stud is vertically connected with the lower surface of the main carrying table; the lower portion and the top end of the pressing module abut against the lower surface of the leveling base plate and the lower surface of the main carrying table respectively, and the upper portion of the pre-pressing module is arranged in the pressing module from the lower side and abuts against the inner top face of the pressing module. The supporting points of the platform to be adjusted are three leveling assemblies, the pressure can be adjusted, the influence of surface contact on the planeness of the platform when bolts are adopted for fixing is reduced, the adjusting time can be greatly shortened, and the efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection and leveling, and in particular to a multi-point leveling mechanism. Background Art

[0002] The booming electronics manufacturing industry, driven by the increasing miniaturization, integration, and functional diversification of electronic products, has necessitated unprecedentedly high quality requirements for printed circuit boards (PCBs) and the components they support. Traditional manual inspection methods have exposed numerous limitations when dealing with complex and delicate PCB assemblies. Manual inspection relies on the inspector's vision and experience, and prolonged work can easily lead to visual fatigue, inevitably leading to missed inspections and false positives. Furthermore, with the continuous expansion of production scale and the continuous acceleration of production speeds, manual inspection efficiency is far from meeting the demands of modern industrialized large-scale production, becoming a key bottleneck restricting production efficiency and product quality.

[0003] To overcome the shortcomings of traditional manual inspection, AOI inspection technology has emerged. Based on advanced optical imaging principles, it uses high-resolution cameras to capture images of PCB boards and their components. With the help of powerful image processing algorithms and intelligent analysis software, it can quickly and accurately identify various defect types, such as missing components, polarity reversal, soldering defects (including cold solder joints, bridging, insufficient soldering), short circuits, and open circuits.

[0004] Some existing high-magnification AOI inspection equipment has high requirements for the flatness of the carrier, and conventional leveling methods are difficult to achieve the required requirements. The processing accuracy of the carrier itself can usually meet the requirements, but after being installed and fixed on the leveling base, the flatness of the platform itself will be affected, which is not only time-consuming and labor-intensive, but also makes it impossible to debug to the appropriate accuracy. Utility Model Content

[0005] Aiming at the problem that existing detection equipment in the prior art has high requirements for the flatness of the carrier and the leveling work is time-consuming and labor-intensive, the utility model proposes a multi-point leveling mechanism to solve the above problems.

[0006] The present application proposes a multi-point leveling mechanism, including a main carrier and a leveling base plate parallel to each other, and also includes a plurality of leveling components evenly distributed on the lower surface of the leveling base plate. The leveling components include a limiting stud, a clamping module and a pre-pressing module. The pre-pressing module and the clamping module are sequentially mounted on the limiting stud, and the end of the limiting stud is vertically connected to the lower surface of the main carrier; the lower part and the top end of the clamping module respectively abut against the lower surface of the leveling base plate and the main carrier, and the upper part of the pre-pressing module is inserted into the clamping module from the lower side and abuts against the inner top surface of the clamping module.

[0007] By adopting the above technical solution, the limiting studs position the centers of the clamping module and the pre-pressing module, adjust the pre-pressure of the pre-pressing module on the clamping module, and preliminarily change the horizontal positions of the main carrier and the leveling substrate by changing the pre-pressure. The upward clamping force provided by the clamping module is then used to lock the main carrier and the leveling substrate, making the leveling work more precise and easy while ensuring the stability of the platform after leveling.

[0008] Preferably, the number of the leveling components is three, and the connecting lines between the leveling components form an equilateral triangle around the center of the leveling substrate.

[0009] By adopting the above technical solution and utilizing the principle of triangular stability, the bottom surfaces of the main carrier and the leveling base are subjected to evenly distributed support forces. The connecting lines between the leveling components form an equilateral triangle. The main carrier can be adjusted to be level by simply and quickly adjusting only three points.

[0010] Preferably, a vertically penetrating mounting groove is provided at the position of the leveling base plate corresponding to the leveling component, and the upper part of the clamping module is embedded in the mounting groove. A threaded hole is provided at the center of the mounting groove corresponding to the lower surface of the main platform, and the end of the limiting stud cooperates with the threaded hole.

[0011] By adopting the above technical solution, the installation points of the clamping module and the limit studs are positioned by combining the mounting grooves and threaded holes to prevent horizontal offset in the installation of the clamping module and the pre-compression module, thereby ensuring that each leveling component supports the main carrier and the leveling baseplate in a stable equilateral triangle structure.

[0012] Preferably, the clamping module includes a ball head seat and a clamping bolt from top to bottom, the upper part of the clamping bolt and the ball head seat are both placed in the mounting groove, and the top surface of the ball head seat is against the lower surface of the main platform.

[0013] By adopting the above technical solution, the top surface of the ball head seat is used to support the main carrier, and the tightening bolt can have a certain relative movable space when the ball head seat is not tightened. When tightened, the tightening bolt and the ball head seat can fit tightly, and the stress concentration caused by the small actual contact area can be avoided.

[0014] Preferably, the top of the clamping bolt cooperates with the lower surface of the ball head seat, and the edge of the top of the clamping bolt is a spherical surface, and the edge of the lower surface of the ball head seat has an arc surface that matches the shape of the top of the clamping bolt.

[0015] By adopting the above technical solution, the pressure can be distributed more evenly when the tightening bolt and the ball head seat are matched. The spherical surface of the tightening bolt and the arc surface of the ball head seat are matched, making the two fit more closely. At the same time, it also plays a positioning role for the tightening direction of the tightening bolt, avoiding position deviation during the leveling process.

[0016] Preferably, a locking nut is further included, wherein the locking nut is threadably engaged with the outer surface of the clamping bolt, and the upper surface of the locking nut abuts against the leveling base plate.

[0017] By adopting the above technical solution, when the pre-pressing module adjusts the pre-pressure for the clamping module in advance, the clamping bolt presses against the ball head seat under the action of the pre-pressure. At this time, the locking nut is screwed upward, and the force of tightening the locking nut upward is used to press the lower surface of the leveling substrate, thereby ensuring the accuracy of the leveling work and the stability after leveling.

[0018] Preferably, the limiting stud is formed with a stepped portion at a position on the lower surface corresponding to the ball head seat, and the stepped portion presses the ball head seat toward the main platform.

[0019] By adopting the above technical solution, when the limiting stud is rotated into position, the ball head seat is pressed against the lower surface of the main platform by the stepped portion, thereby achieving a preliminary positioning and fixation of the entire leveling assembly.

[0020] Preferably, a reference groove is provided on the lower surface of the ball head seat corresponding to the top of the clamping bolt, a fixing hole is provided at the center of the reference groove for the end of the limiting stud to pass through, and the stepped portion presses upward against the edge of the fixing hole.

[0021] By adopting the above technical solution, when the clamping bolt is subjected to upward pressure, the spherical edge of the clamping bolt slides on the arc surface of the edge of the ball head seat until the top of the clamping bolt is completely aligned with the reference groove, ensuring that the positions of the various components of the leveling assembly in the vertical direction remain consistent, thereby improving the accuracy of the leveling work.

[0022] Preferably, the pre-stressing module includes a pre-stressing spring, a first adjusting nut and a second adjusting nut. A vertical upward compression chamber is opened at the bottom of the tightening bolt. The pre-stressing spring is placed in the compression chamber, and the top end of the pre-stressing spring is against the top surface of the compression chamber.

[0023] By adopting the above technical solution, a compression chamber is set to accommodate the pre-stress spring, the overall length of the leveling assembly is shortened, and the space occupied is reduced. By utilizing the compressible characteristics of the pre-stress spring, the size of the pre-stress generated by the pre-stress spring on the tightening bolt can be adjusted by adjusting the compression degree of the pre-stress spring.

[0024] Preferably, the first adjusting nut and the second adjusting nut are threadedly engaged with the limiting stud, and the first adjusting nut compresses the pre-compression spring upwards, and the second adjusting nut presses upwards against the bottom surface of the first adjusting nut.

[0025] By adopting the above technical solution, the first adjusting nut is rotated along the direction of the limit stud, and the pre-compression spring is compressed upward when rotating upward, and the pre-compression spring is extended downward when rotating downward. When the position of the first adjusting nut is adjusted, in order to prevent the position of the first adjusting nut from being offset under the influence of other forces, the second adjusting nut is rotated upward and tightened to lock the first adjusting nut, further ensuring that no offset will occur after leveling is completed.

[0026] The beneficial effects of this application compared with the prior art are:

[0027] The multi-point leveling mechanism has many significant beneficial effects. First, the leveling system offers high precision and easy operation. By varying the preload force using the pre-load module, the horizontal position of the main stage and the leveling baseplate can be initially adjusted, and then locked with the help of the clamping module. This effectively avoids the tedious and inaccurate leveling methods associated with traditional leveling methods and is particularly suitable for precision equipment installation and testing scenarios where levelness is critical. Second, the system offers strong stability. The precise positioning of the leveling assembly by the mounting slots and threaded holes, the clamping and securing of the ball seat by the stepped portion of the limit stud, the clamping nut against the leveling baseplate, and the locking function of the adjustment nut all ensure that the leveled platform remains stable and level during use. This significantly reduces the risk of equipment failure caused by platform sway or displacement, extending the equipment's service life. Third, the spherical and curved surfaces of the ball seat and the clamping bolt in the clamping module not only evenly distribute pressure to avoid stress concentration, but also provide precise positioning of the clamping direction. The design of the compression chamber and adjustment nut increases the upper limit of preload force while saving space, making the entire mechanism compact and convenient for installation and maintenance. It can also be efficiently used in equipment with limited space, improving overall performance and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and, together with the description, serve to explain the principles of the present invention. Other embodiments and many of the expected advantages of the embodiments will be readily apparent as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with respect to each other. Like reference numerals designate corresponding similar parts.

[0029] Figure 1 is a schematic structural diagram of a multi-point leveling mechanism according to an embodiment of the present application;

[0030] Figure 2 is an exploded schematic diagram of a leveling assembly structure according to an embodiment of the present application;

[0031] Figure 3 is a cross-sectional view of a multi-point leveling mechanism according to an embodiment of the present application;

[0032] Figure 4 It is a partially enlarged view of an embodiment according to the present application.

[0033] The meaning of the numbers in the figure:

[0034] Main platform 01, leveling base plate 02, leveling assembly 03, limit stud 04, clamping module 05, pre-compression module 06, mounting groove 07, threaded hole 08, ball head seat 09, clamping bolt 10, locking nut 11, stepped portion 12, reference groove 13, pre-compression spring 14, first adjusting nut 15, second adjusting nut 16, compression chamber 17. DETAILED DESCRIPTION

[0035] In the following detailed description, reference is made to the accompanying drawings, which form a part of the detailed description and are shown by way of illustrative specific embodiments in which the present invention may be practiced. In this regard, directional terms, such as "top," "bottom," "left," "right," "up," "down," etc., are used with reference to the orientation of the figures being described. Because the components of the embodiments may be positioned in several different orientations, directional terms are used for illustrative purposes and are in no way limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present invention. The following detailed description should therefore not be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0036] Figure 1 FIG2 shows a schematic structural diagram of a multi-point leveling mechanism according to an embodiment of the present application. Figure 2 FIG. 1 shows an exploded schematic diagram of a leveling assembly structure according to an embodiment of the present application, as shown in FIG. Figure 1-2 As shown, the leveling mechanism includes a main carrier 01 and a leveling base plate 02 which are parallel to each other, and also includes a leveling component 03 evenly distributed on the lower surface of the leveling base plate 02. The leveling component 03 includes a limiting stud 04, a clamping module 05 and a pre-pressing module 06. The pre-pressing module 06 and the clamping module 05 are sequentially mounted on the limiting stud 04, and the end of the limiting stud 04 is vertically connected to the lower surface of the main carrier 01; the lower part and the top end of the clamping module 05 respectively abut against the lower surfaces of the leveling base plate 02 and the main carrier 01, and the upper part of the pre-pressing module 06 is inserted into the clamping module 05 from the lower side and abuts against the inner top surface of the clamping module 05.

[0037] Specifically, there are three leveling components 03, and the connecting lines between the leveling components 03 form an equilateral triangle around the center of the leveling substrate 02. The shapes of the main platform 01 and the leveling substrate 02 are disc-shaped in the embodiment. The equilateral triangle is more compatible with the circular structure, and can achieve a good leveling effect by using fewer points, reducing the time and labor costs of leveling.

[0038] Furthermore, the point distribution of the leveling component 03 is not limited to three, and can also be four, five, or other distribution modes with higher stability.

[0039] By adopting the above technical solution and utilizing the principle of triangular stability, the bottom surfaces of the main platform 01 and the leveling substrate 02 are subjected to evenly distributed support forces, and the connecting lines between the leveling components 03 form an equilateral triangle. The main platform 01 can be adjusted to be level by simply and quickly adjusting the three points.

[0040] Specifically, the limiting stud 04 first passes through the pre-pressing module 06, and the upper part of the pre-pressing module 06 enters the interior of the clamping module 05 from the bottom, and presses upward against the inner top surface of the pre-pressing module 06 to generate upward pre-pressure. After the limiting stud 04 passes through the clamping module 05, it is threadedly engaged with the lower surface of the main carrier 01.

[0041] By adopting the above technical solution, the limiting stud 04 positions the center of the clamping module 05 and the pre-pressing module 06, adjusts the pre-pressure of the pre-pressing module 06 on the clamping module 05, and preliminarily changes the horizontal position of the main carrier 01 and the leveling substrate 02 by changing the pre-pressure. Then, the upward clamping force provided by the clamping module 05 is used to lock the main carrier 01 and the leveling substrate 02, making the leveling work more precise and easy while ensuring the stability of the platform after leveling.

[0042] Preferably, the leveling substrate 02 is provided with a vertically penetrating mounting groove 07 at the position corresponding to the leveling component 03, and the upper part of the clamping module 05 is embedded in the mounting groove 07. A threaded hole 08 is provided at the center of the mounting groove 07 corresponding to the lower surface of the main platform 01, and the end of the limiting stud 04 cooperates with the threaded hole 08.

[0043] By adopting the above technical solution, the installation points of the clamping module 05 and the limiting stud 04 are positioned by utilizing the combination of the mounting groove 07 and the threaded hole 08 to prevent horizontal offset of the installation of the clamping module 05 and the pre-pressing module 06, thereby ensuring that each leveling component 03 supports the main carrier 01 and the leveling base plate 02 in a stable equilateral triangle structure.

[0044] Figure 3 shows a cross-sectional view of a multi-point leveling mechanism according to an embodiment of the present application, Figure 4 A partial enlarged view of an embodiment according to the present application is shown, as shown in FIG. Figure 1-4 As shown, the clamping module 05 includes a ball head seat 09 and a clamping bolt 10 from top to bottom. The upper part of the clamping bolt 10 and the ball head seat 09 are both placed in the mounting groove 07, and the top surface of the ball head seat 09 is against the lower surface of the main platform 01.

[0045] Specifically, the ball head seat 09 is first locked on the lower surface of the main platform 01 by the end of the limiting stud 04. When no pre-pressure is set, there is a certain displacement space between the ball head seat 09 and the clamping bolt 10.

[0046] By adopting the above technical solution, the top surface of the ball head seat 09 is used to press against the main carrier 01, and the tightening bolt 10 can have a certain relative movable space when the ball head seat 09 is not tightened. When tightened, the tightening bolt 10 and the ball head seat 09 can fit tightly together, and the stress concentration phenomenon caused by the small actual contact area can be avoided.

[0047] Preferably, the top of the clamping bolt 10 cooperates with the lower surface of the ball head seat 09, and the top edge of the clamping bolt 10 is spherical, and the lower surface edge of the ball head seat 09 has an arc surface that matches the shape of the top of the clamping bolt 10.

[0048] Specifically, the spherical surface of the top edge of the clamping bolt 10 and the arc surface of the lower surface of the ball head seat 09 can slide relative to each other, making the position adjustment of the two easier when they are in cooperation, and playing a certain limiting role.

[0049] By adopting the above technical solution, the pressure can be distributed more evenly when the clamping bolt 10 cooperates with the ball head seat 09. The spherical surface of the clamping bolt 10 cooperates with the arc surface of the ball head seat 09, making the two fit more closely. At the same time, it also plays a positioning role for the clamping direction of the clamping bolt 10, avoiding position deviation during the leveling process.

[0050] Preferably, a locking nut 11 is further included, and the locking nut 11 is threadedly engaged with the outer surface of the clamping bolt 10 , and the upper surface of the locking nut 11 is against the leveling base plate 02 .

[0051] When the clamping bolt 10 is only subjected to an upward preload, the leveling base plate 02 can still perform a certain relative movement. By adjusting the position of the locking nut 11 , the position of the leveling base plate 02 can be restricted.

[0052] By adopting the above technical solution, when the pre-pressing module 06 adjusts the pre-pressure for the clamping module 05 in advance, the clamping bolt 10 presses against the ball head seat 09 under the action of the pre-pressure. At this time, the locking nut 11 is screwed upward, and the force of tightening the locking nut 11 upward is used to press the lower surface of the leveling substrate 02, thereby ensuring the accuracy of the leveling work and the stability after leveling.

[0053] Preferably, the limiting stud 04 is formed with a stepped portion 12 at a position on the lower surface corresponding to the ball head seat 09 , and the stepped portion 12 presses the ball head seat 09 toward the main platform 01 .

[0054] By adopting the above technical solution, when the limiting stud 04 is rotated into position, the ball head seat 09 is pressed against the lower surface of the main platform 01 by the stepped portion 12, thereby achieving a preliminary positioning and fixation of the entire leveling assembly 03.

[0055] Preferably, a reference groove 13 is provided on the lower surface of the ball head seat 09 corresponding to the top of the clamping bolt 10, and a fixing hole is provided at the center of the reference groove 13 for the end of the limiting stud 04 to pass through, and the stepped portion 12 presses upward against the edge of the fixing hole.

[0056] By adopting the above technical solution, when the clamping bolt 10 is subjected to upward pressure, the spherical edge of the clamping bolt 10 slides on the arc surface of the edge of the ball head seat 09 until the top of the clamping bolt 10 is completely aligned with the reference groove 13, ensuring that the positions of the various components of the leveling assembly 03 in the vertical direction remain consistent, thereby improving the accuracy of the leveling work.

[0057] Preferably, the pre-stressing module 06 includes a pre-stressing spring 14, a first adjusting nut 15 and a second adjusting nut 16. A vertically upward compression chamber 17 is opened at the bottom of the tightening bolt 10. The pre-stressing spring 14 is placed in the compression chamber 17, and the top end of the pre-stressing spring 14 is against the top surface of the compression chamber 17.

[0058] By adopting the above technical solution, a compression chamber 17 is set to accommodate the pre-stress spring 14, thereby reducing the overall length of the leveling assembly 03 and reducing space occupancy. By utilizing the compressible characteristics of the pre-stress spring 14, the size of the pre-stress generated by the pre-stress spring 14 on the tightening bolt 10 can be adjusted by adjusting the degree of compression of the pre-stress spring 14.

[0059] Preferably, the first adjusting nut 15 and the second adjusting nut 16 are threadedly engaged with the limiting stud 04 , and the first adjusting nut 15 compresses the preload spring 14 upward, and the second adjusting nut 16 presses upward against the bottom surface of the first adjusting nut 15 .

[0060] By adopting the above technical solution, the first adjusting nut 15 is rotated along the direction of the limit stud 04. When rotating upward, the pre-compression spring 14 is compressed upward, and when rotating downward, the pre-compression spring 14 is extended downward. When the position of the first adjusting nut 15 is adjusted, in order to prevent the position of the first adjusting nut 15 from being offset under the influence of other forces, the second adjusting nut 16 is used to rotate upward and tighten the first adjusting nut 15 to lock the first adjusting nut 15, further ensuring that no offset will occur after leveling is completed.

[0061] Preferably, the sizes of the first adjusting nut 15 and the second adjusting nut 16 are adapted to the size of the compression chamber 17 , and the length of the pre-compression spring 14 is greater than the depth of the compression chamber 17 .

[0062] By adopting the above technical solution, the relatively long preload spring 14 has a larger compression limit and can generate a larger preload. At the same time, the first adjusting nut 15 and the second adjusting nut 16 can be rotated along the limiting stud 04 into the compression chamber 17, greatly increasing the upper limit of the preload that can be generated and saving a certain amount of space.

[0063] Specifically, the specific leveling method of the present application is: the main carrier 01 is placed on the leveling base plate 02, and the limiting studs 04 of each leveling component 03 are first matched with the threaded holes 08 on the lower surface of the main carrier 01, and at the same time, the limiting studs 04 pass through the second adjusting nut 16, the first adjusting nut 15, the pre-compression spring 14, the clamping bolt 10, the locking nut 11 and the ball head seat 09 from bottom to top. At this time, the leveling component 03 is in the initial state, that is, the pre-compression spring 14 is in the initial state. When leveling begins, first rotate the first adjusting nut 15 upward so that the pre-compression spring 14 is compressed upward. The force generated by the compression acts on the inner top surface of the clamping bolt 10, and the clamping bolt 10 The top spherical surface of the bolt 10 slides on the arc surface of the ball head seat 09, so that the center of the tightening bolt 10 is completely aligned with the center of the reference groove 13. After adjusting the preload of the three leveling components 03, the second adjusting nut 16 is pressed against the lower surface of the first adjusting nut 15 for locking to avoid the position of the first adjusting nut 15 changing due to shaking or other forces, thereby ensuring that the preload will not deviate. Then, the locking nut 11 is rotated upward so that the locking nut 11 presses upward against the leveling substrate 02, so that the positions of the main platform 01 and the leveling substrate 02 are fixed and no relative displacement occurs, thereby ensuring stability after leveling is completed.

[0064] The beneficial effects of this application compared with the prior art are:

[0065] This multi-point leveling mechanism has many significant benefits. First, the leveling accuracy is high and the operation is easy. By changing the pre-pressure by the pre-pressing module 06, the horizontal position of the main platform 01 and the leveling base plate 02 can be preliminarily adjusted, and then locked with the help of the clamping module 05, which effectively avoids the tediousness and inaccuracy of the traditional leveling method. It is especially suitable for the installation and inspection of precision equipment with strict requirements on the levelness. Second, it has strong stability. Whether it is the precise positioning of the leveling component 03 by the mounting groove 07 and the threaded hole 08, or the pressing and fixing of the ball head seat 09 by the stepped portion 12 of the limit stud 04, or the pressing and fixing of the leveling base plate 02 by the locking nut 11 and the locking function of the adjustment nut, It fully guarantees that the platform can maintain a stable horizontal state during use after leveling, which can greatly reduce the risk of equipment failure caused by platform shaking or displacement, and extend the service life of the equipment; thirdly, the spherical surface and arc surface of the ball head seat 09 and the clamping bolt 10 in the clamping module 05 are matched, which not only evenly distributes the pressure to avoid stress concentration, but also can locate the clamping direction. At the same time, the design of the compression chamber 17 and the adjusting nut saves space while increasing the upper limit of the pre-pressure, making the entire mechanism compact and reasonable, easy to install and maintain, and can also be efficiently used inside equipment with limited space, thereby improving the overall performance and reliability of the equipment.

[0066] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that the combination of these measures cannot be used to advantage. Any reference signs in the claims should not be considered as limiting the scope.

Claims

1. A multi-point leveling mechanism, comprising a main platform and a leveling substrate parallel to each other, characterized in that: It also includes a plurality of leveling components evenly distributed on the lower surface of the leveling base plate, and the leveling components include a limiting stud, a pressing module and a pre-pressing module. The pre-pressing module and the pressing module are sequentially mounted on the limiting stud, and the end of the limiting stud is vertically connected to the lower surface of the main carrier; the lower part and the top end of the pressing module respectively abut the lower surface of the leveling base plate and the main carrier, and the upper part of the pre-pressing module is inserted into the interior of the pressing module from the bottom side and abuts the inner top surface of the pressing module.

2. The leveling mechanism according to claim 1, characterized in that: The number of the leveling components is three, and the connecting lines between the leveling components form an equilateral triangle around the center of the leveling substrate.

3. The leveling mechanism according to claim 1, characterized in that: The leveling base plate is provided with a vertically penetrating mounting groove at the position corresponding to the leveling component, and the upper part of the clamping module is embedded in the mounting groove. The lower surface of the main platform is provided with a threaded hole corresponding to the center of the mounting groove, and the end of the limiting stud cooperates with the threaded hole.

4. The leveling mechanism according to claim 3, characterized in that: The clamping module includes a ball head seat and a clamping bolt from top to bottom. The upper part of the clamping bolt and the ball head seat are both placed in the installation groove, and the top surface of the ball head seat is against the lower surface of the main platform.

5. The leveling mechanism according to claim 4, characterized in that: The top of the clamping bolt cooperates with the lower surface of the ball seat, and the edge of the top of the clamping bolt is a spherical surface. The edge of the lower surface of the ball seat has an arc surface that matches the shape of the top of the clamping bolt.

6. The leveling mechanism according to claim 4, characterized in that: The utility model further comprises a locking nut, wherein the locking nut is threadably matched with the outer surface of the pressing bolt, and the upper surface of the locking nut abuts against the leveling base plate.

7. The leveling mechanism according to claim 4, characterized in that: The limiting stud is formed with a stepped portion at a position on the lower surface corresponding to the ball head seat, and the stepped portion presses the ball head seat toward the main platform.

8. The leveling mechanism according to claim 7, characterized in that: A reference groove is provided on the lower surface of the ball head seat corresponding to the top end of the clamping bolt, and a fixing hole is provided at the center of the reference groove for the end of the limiting stud to pass through, and the stepped portion presses upward against the edge of the fixing hole.

9. The leveling mechanism according to claim 4, characterized in that: The pre-stressing module includes a pre-stressing spring, a first adjusting nut and a second adjusting nut. A vertical upward compression chamber is opened at the bottom of the tightening bolt. The pre-stressing spring is placed in the compression chamber, and the top end of the pre-stressing spring is against the top surface of the compression chamber.

10. The leveling mechanism according to claim 9, characterized in that: The first adjusting nut and the second adjusting nut are threadably matched with the limiting stud, and the first adjusting nut compresses the pre-compression spring upwards, and the second adjusting nut presses upwards against the bottom surface of the first adjusting nut.

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