Fine adjustment screw for marble slab of billiard table

Abstract

The utility model discloses a fine adjustment screw for a marble slab of a billiard table, and relates to the technical field of sports machinery accessories. Comprising a nut base, a screw rod and a nut, the nut base is provided with a through hole of the screw rod, a supporting circular plate is fixed to the upper end of the screw rod, an elastic cushion is installed at the upper end of the supporting circular plate, and the upper end and the lower end of the elastic cushion are planes; a spline is fixed at the lower end of the screw rod; a hollow pipe is coaxially arranged at the bottom of the nut base, a spline cavity matched with the spline is formed in an inner cavity of the hollow pipe, and the spline cavity communicates with an inner cavity of the through hole. The elastic cushion is arranged at the upper end of the screw rod, the deformation characteristic of the elastic cushion can enable supporting force applied by the screw rod to 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, meanwhile, the hidden crack risk caused by repeated impact of the marble table top is 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 fine-tuning screw for marble slabs of billiard tables. 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 micro-adjustment 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, leading to edge chipping or surface peeling. Therefore, this application provides a micro-adjustment screw for billiard table marble slabs to meet the requirements. Utility Model Content

[0005] The purpose of this application is to provide a fine-tuning screw for a marble slab of a billiard table, which solves the technical problem that the screw's hard contact with the marble slab can easily lead to micro-cracks, edge chipping, or surface peeling.

[0006] To achieve the above objectives, this application provides the following technical solution: a fine-tuning screw for a marble slab of a billiard table, comprising a nut base, a screw rod, and a nut, wherein the nut base is provided with a through hole for the screw rod, a support circular plate is fixed to the upper end of the screw rod, and an elastic pad is installed on the upper end of the support circular plate, wherein the upper and lower ends of the elastic pad are both flat.

[0007] The lower end of the screw is fixed with a spline;

[0008] 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.

[0009] In a preferred embodiment of this invention, a cavity is provided at the upper end of the elastic pad.

[0010] As a preferred embodiment of this invention, a spiral flow channel is provided on the inner wall of the concave cavity.

[0011] In a preferred embodiment of this invention, the cavity is configured as an inverted conical structure.

[0012] In a preferred embodiment of this invention, a snap-fit ​​ball is provided at the upper axis of the supporting circular plate, and a snap-fit ​​cavity adapted to the snap-fit ​​ball is provided at the lower axis of the elastic pad.

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

[0014] This utility model has a reasonable structure. An elastic pad is set at the upper end of the screw to form a flexible contact with the marble slab. The deformation characteristics of the elastic pad 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, a cavity is provided at the upper axis of the elastic pad. The design of the 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.

[0016] In this invention, a spiral flow channel is provided on the inner wall of the concave cavity. This design can significantly improve the negative pressure effect and exhaust efficiency by optimizing the air flow path and pressure distribution.

[0017] In this invention, the cavity is designed as an inverted conical structure, and the conical design can disperse stress through a gradual change in inner diameter, reduce local pressure concentration, and extend the life of the elastic pad. At the same time, the gradual characteristics of the conical design make the negative pressure distribution more uniform. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the partial split structure in the middle;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of a medium-elasticity store;

[0022] Figure 4 for Figure 1 Top view of the nut base structure.

[0023] In the diagram: 1. Nut base; 2. Hollow tube; 3. Screw; 4. Nut; 5. Support plate; 6. Elastic pad; 7. Spline; 8. Cavity; 9. Spiral flow channel; 10. Snap-fit ​​ball; 11. Snap-fit ​​cavity; 12. Spline cavity. Detailed Implementation

[0024] 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.

[0025] Example: Reference Figure 1 , 2 A fine-tuning screw for a marble slab of a billiard table, as shown in Figure 4, includes a nut base 1, a screw 3, and a nut 4. The nut base 1 is provided with a through hole for the screw 3. A support circular plate 5 is fixed to the upper end of the screw 3, and an elastic pad 6 is installed on the upper end of the support circular plate 5. The upper and lower ends of the elastic pad 6 are both flat.

[0026] The lower end of the screw 3 is fixed with a spline 7;

[0027] 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 adapted to the spline 7. The spline cavity 12 communicates with the inner cavity of the through hole.

[0028] When in use, the nut base 1 can be fixed on the support plate, and the screw 3 can be moved upward by rotating the nut 4 (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), so that the upper end of the elastic pad 6 abuts against the lower end of the marble slab.

[0029] 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.

[0030] In billiards, the impact force generated by the cue stick hitting the ball may be transmitted to the supporting structure through the table. The elastic pad 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.

[0031] 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.

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

[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 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, the concave 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] In a preferred embodiment of this invention, a snap-fit ​​ball 10 is provided at the upper axis of the supporting circular plate 5, and a snap-fit ​​cavity 11 adapted to the snap-fit ​​ball 10 is provided at the lower axis of the elastic pad 6.

[0041] When the locking cavity 11 at the lower end of the elastic pad 6 is aligned with the locking ball 10, the elastic pad 6 is deformed and the locking ball 10 eventually moves into the locking cavity 11, thus completing the installation. When disassembling, simply pinch both sides of the elastic pad 6 and pull it outwards to make the locking ball 10 move out of the locking cavity 11, thus separating the two and facilitating the installation and disassembly of the elastic pad 6.

[0042] 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 fine-tuning screw for a marble slab of a billiard table, comprising a nut base (1), a screw (3), and a nut (4), wherein the nut base (1) is provided with a through hole for the screw (3), characterized in that: The upper end of the screw (3) is fixed with a support circular plate (5), and an elastic pad (6) is installed on the upper end of the support circular plate (5). The upper and lower ends of the elastic pad (6) are both flat. 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 fine-tuning screw for a marble slab of a billiard table according to claim 1, characterized in that: A cavity (8) is provided at the upper axis of the elastic pad (6).

3. The fine-tuning screw for a marble slab of a billiard table 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 fine-tuning screw for a marble slab of a billiard table according to claim 3, characterized in that: The cavity (8) is configured as an inverted cone shape.

5. The fine-tuning screw for a marble slab of a billiard table according to claim 1, characterized in that: A snap-fit ​​ball (10) is provided at the upper axis of the support circular plate (5), and a snap-fit ​​cavity (11) adapted to the snap-fit ​​ball (10) is provided at the lower axis of the elastic pad (6).

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