Novel fine adjustment screw for marble slab

Abstract

The utility model discloses a novel fine tuning screw for marble slabs, which comprises a nut base, a screw rod and an adjusting nut, the nut base is provided with a through hole of the screw rod, the screw rod is in threaded connection with a fixing nut, and an elastic cushion is placed at the upper end of the fixing nut; a penetrating column is fixed to the upper end of the screw rod, the upper end of the penetrating column is an arc-shaped spherical surface, a penetrating through hole matched with the penetrating column is formed in the axis position of the elastic cushion, and the length of the penetrating column is larger than the thickness of the elastic cushion. The fine adjustment screws can support the marble slab during installation, movement and adjustment of the marble slab are facilitated, after the position of the marble slab is adjusted, the marble slab is flexibly supported through the elastic cushion, and supporting force applied by the screws can be transmitted to the bottom of the marble slab more evenly; deformation or cracking of the marble slab caused by local stress concentration is avoided, hidden cracking risks caused by repeated impact of the marble table top are reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sports machinery parts technology, and in particular to a new type of fine-tuning screw for marble slabs. Background Technology

[0002] Billiards is a popular sport, and whether for competition or casual recreation, a high level of skill is required for the billiard table. A typical billiard table consists of a marble tabletop, a support plate, and legs. During the manufacturing process, unevenness between the marble tabletop and the support plate is a common issue. Therefore, during installation, fine-tuning components are typically installed in the gap between the marble tabletop and the support plate to adjust the tabletop's level.

[0003] The existing fine-tuning screw includes a nut base, a notched screw, and a nut (see reference). Figure 4 The nut base is mounted on the support plate, and the nut threaded onto the screw (made of metal alloy material). The lower end of the screw is inserted into the insertion hole provided on the nut base, and the upper end of the screw contacts the bottom surface of the marble slab. The lower end of the nut and the upper end of the nut base are pressed together to support the marble. The screw can be moved up and down by rotating the nut, thereby fine-tuning the level of the marble.

[0004] The existing fine-tuning parts have the following problems: the marble surface appears smooth, but there are tiny bumps and depressions under a microscope. When the metal screw tip makes hard contact, the pressure is concentrated at the local protrusion point, forming a "stress concentration point". Long-term exposure to the impact of billiard balls or its own weight may cause micro-cracks to form inside the marble, or even cause hidden fractures. Marble is a brittle material with a tensile strength far lower than its compressive strength. The tensile stress generated by hard contact may exceed its limit, causing edge chipping or surface peeling. Therefore, this application provides a new type of fine-tuning screw for marble slabs to meet the requirements. Utility Model Content

[0005] The purpose of this application is to provide a novel fine-tuning screw for marble slabs, which solves the technical problem that the hard contact between the screw and the marble slab can easily lead to micro-cracks, edge chipping, or surface peeling in the marble slab.

[0006] To achieve the above objectives, this application provides the following technical solution: a novel fine-tuning screw for marble slabs, comprising a nut base, a screw rod, and an adjusting nut, wherein the nut base is provided with a through hole for the screw rod, the upper thread of the screw rod is connected to a fixing nut, and an elastic washer is placed at the upper end of the fixing nut;

[0007] The upper end of the screw is fixed with a through post, and the upper end of the through post is an arc-shaped spherical surface. The elastic pad is provided with a through hole adapted to the through post at the axial center, and the length of the through post is greater than the thickness of the elastic pad.

[0008] The lower end of the screw is fixed with a spline;

[0009] The bottom of the nut base is coaxially provided with a hollow tube, and the inner cavity of the hollow tube is provided with a spline cavity that is adapted to the spline, and the spline cavity communicates with the inner cavity of the through hole.

[0010] In a preferred embodiment of this invention, the upper end of the elastic pad is provided with a cavity.

[0011] As a preferred embodiment of this invention, a spiral flow channel is provided on the inner wall of the concave cavity.

[0012] In a preferred embodiment of this invention, the cavity is configured as an inverted conical structure.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] This utility model has a reasonable structure. When the fine-adjusting screw is installed, it can form a small area of ​​contact support for the marble slab, which facilitates the movement and adjustment of the marble slab. After the position of the marble slab is adjusted, the elastic pad is used to provide flexible support for the marble slab, which can make the supporting force applied by the screw more evenly transmitted to the bottom of the marble slab, avoiding local stress concentration that could cause the marble slab to deform or crack. At the same time, it reduces the risk of hidden cracks caused by repeated impacts on the marble tabletop and extends its service life.

[0015] In this invention, the upper end of the elastic pad is provided with a concave cavity. The design of the concave cavity allows the elastic pad to form a negative pressure adsorption effect with the marble slab, enhancing the bonding force with the marble tabletop and effectively preventing minor displacement caused by ball impact, temperature changes, or long-term use, thus significantly improving the stability of the billiard table. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the partial split structure in the middle;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the medium elastic pad;

[0020] Figure 4 for Figure 1 A schematic diagram of the middle shell nut base from below.

[0021] In the diagram: 1. Nut base; 2. Hollow tube; 3. Screw; 4. Adjusting nut; 5. Fixing nut; 6. Elastic washer; 7. Spline; 8. Cavity; 9. Spiral flow channel; 10. Through column; 11. Arc-shaped spherical surface; 12. Spline cavity. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Reference Figure 1 , Figure 2 and Figure 4 The present invention relates to a novel fine-tuning screw for marble slabs, comprising a nut base 1, a screw rod 3, and an adjusting nut 4. The nut base 1 is provided with a through hole for the screw rod 3, and a fixing nut 5 is threaded onto the upper part of the screw rod 3. An elastic washer 6 is placed on the upper end of the fixing nut 5.

[0024] The upper end of the screw 3 is fixed with a through post 10, and the upper end of the through post 10 is an arc-shaped spherical surface 11. The elastic pad 6 is provided with a through hole that matches the through post 10 at the center of the axis, and the length of the through post 10 is greater than the thickness of the elastic pad 6.

[0025] A spline 7 is fixed to the lower end of the screw 3;

[0026] A hollow tube 2 is coaxially arranged at the bottom of the nut base 1, and the inner cavity of the hollow tube 2 is provided with a spline cavity 12 that is compatible with the spline 7. The spline cavity 12 communicates with the inner cavity of the through hole.

[0027] In use, the nut base 1 can be fixed on the support plate. By rotating the nut 4, the screw 3 can be moved upward (through the cooperation of the spline 7 and the spline cavity 12, the screw 3 can only move in a straight line up and down), and finally the top of the arc-shaped spherical surface 11 at the upper end of the penetrating column 10 abuts against the lower end of the marble slab. Since the top of the arc-shaped spherical surface 11 has a small contact area with the marble slab, it is convenient for the marble slab to be moved and adjusted. After the position of the marble slab is adjusted, the fixing nut 5 is rotated, so that the fixing nut 5 moves upward and lifts the elastic pad 6, so that the upper end of the elastic pad 6 contacts the lower end of the marble slab and lifts the marble slab until the upper end of the penetrating column 10 no longer contacts the lower end of the marble slab.

[0028] The deformation characteristics of the elastic pad 6 allow the supporting force applied by the screw 3 to be transmitted more evenly to the bottom of the marble slab, avoiding local stress concentration that could cause the marble slab to deform or crack.

[0029] In billiards, the impact force generated by the cue hitting the ball may be transmitted to the supporting structure through the table. The elastic pad 6 can absorb some of the vibration energy, reduce the risk of micro-cracks in the marble tabletop caused by repeated impacts, and extend its service life.

[0030] The compression and rebound characteristics of the elastic material can compensate for the slight height error when adjusting the screw 3, making the level adjustment "smoother" and reducing the overshoot phenomenon caused by mechanical stiffness.

[0031] It should be noted that during installation, the elastic pad 6 ensures that the fixing nut 5 is securely installed on the screw 3 by means of the elastic force of the elastic pad 6.

[0032] As a preferred embodiment of this example, Figure 1 As shown, the upper end of the elastic pad 6 is provided with a cavity 8.

[0033] The design of the concave cavity 8 allows the elastic pad 6 to form a negative pressure adsorption effect with the marble slab, enhancing the bonding force with the marble tabletop and effectively preventing minor displacements caused by ball impact, temperature changes, or long-term use, thus significantly improving the stability of the billiard table.

[0034] As a preferred embodiment of this example, Figure 3 As shown, Figure 1 As shown, a spiral flow channel 9 is provided on the inner wall of the concave cavity 8.

[0035] This design significantly improves the negative pressure effect and exhaust efficiency by optimizing the airflow path and pressure distribution.

[0036] It should be noted that the spiral channel 9 extends from bottom to top, and its air outlet is flush with the upper surface of the elastic pad 6.

[0037] As a preferred embodiment of this example, Figure 3 As shown, cavity 8 is configured as an inverted conical structure.

[0038] The tapered cavity 8 has a gradually changing inner diameter that guides air to gather towards the center, while the spiral pattern accelerates air discharge through its guiding effect, forming a "spiral exhaust channel". The two work together to significantly improve exhaust efficiency.

[0039] Furthermore, the tapered design can disperse stress through a gradual change in inner diameter, reduce local pressure concentration, and extend the life of the elastic pad 6. At the same time, the gradual characteristics of the tapered design make the negative pressure distribution more uniform.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel fine-tuning screw for marble slabs, comprising a nut base (1), a screw (3), and an adjusting nut (4), wherein the nut base (1) is provided with a through hole for the screw (3), characterized in that: The upper thread of the screw (3) is connected to a fixing nut (5), and an elastic pad (6) is placed on the upper end of the fixing nut (5). The upper end of the screw (3) is fixed with a through post (10), and the upper end of the through post (10) is an arc-shaped spherical surface (11). The elastic pad (6) has a through hole at its axis that is compatible with the through post (10), and the length of the through post (10) is greater than the thickness of the elastic pad (6). The lower end of the screw (3) is fixed with a spline (7); The bottom of the nut base (1) is coaxially provided with a hollow tube (2), and the inner cavity of the hollow tube (2) is provided with a spline cavity (12) adapted to the spline (7), and the spline cavity (12) communicates with the inner cavity of the through hole.

2. The novel fine-tuning screw for marble slabs according to claim 1, characterized in that: The upper end of the elastic pad (6) is provided with a cavity (8).

3. The novel fine-tuning screw for marble slabs according to claim 2, characterized in that: A spiral flow channel (9) is provided on the inner wall of the concave cavity (8).

4. The novel fine-tuning screw for marble slabs according to claim 3, characterized in that: The cavity (8) is configured as an inverted cone shape.

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