Anti-cracking large-pitch long screw

Abstract

The utility model relates to the technical field of screws, in particular to an anti-cracking large-pitch long screw. The anti-cracking large-pitch long screw comprises a large-pitch long screw body, a first annular groove is formed in the bottom of a screw head of the large-pitch long screw body, the first annular groove is located on an outer ring of a screw rod of the large-pitch long screw body, and a second annular groove is formed in the top of the first annular groove; according to the large-pitch long screw, by screwing the large-pitch long screw, the fixing cone can be driven to be inserted into the surface of the wood structure, the bottom of the anti-skid pad is driven to be tightly attached to the surface of the wood structure, and original hard extrusion connection between a screw head of the large-pitch long screw and the wood structure can be changed into flexible extrusion connection through the anti-skid pad; therefore, cracking of the wood structure due to extrusion in the later period is prevented; the friction force of contact between the screw head of the large-pitch long screw and a wood structure can be improved through the anti-skid pad and the fixing cone, and then the stability of the large-pitch long screw after installation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to an anti-cracking large pitch long screw. Background Technique

[0002] Nowadays, when docking and fixing two groups of wooden structures, it is mostly achieved by self-tapping and screwing in large pitch long screws. However, after the screws are tightened, the screw head contacts and presses against the surface of the wooden structure for a long time, which easily causes cracking at the part where the wooden structure contacts the screw head, thus affecting the fixing effect of the screws and the service life of the wooden structure. In view of the above situation, technical innovation is carried out on the existing anti-cracking large pitch long screws. Content of the Utility Model

[0003] The purpose of the utility model is to provide an anti-cracking large pitch long screw to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an anti-cracking large pitch long screw, including:

[0005] A large pitch long screw, a first annular groove is opened at the bottom of the screw head of the large pitch long screw, the first annular groove is located on the outer ring of the screw rod of the large pitch long screw, and a second annular groove is opened at the top of the first annular groove, wherein: a support assembly is placed in the first annular groove and the second annular groove, and an anti-cracking assembly is placed at the bottom of the support assembly.

[0006] Preferably, the support assembly includes a connecting ring, a rotating ring is arranged at the top of the connecting ring, and balls are evenly inlaid at the top of the rotating ring.

[0007] Preferably, the connecting ring is arranged in the first annular groove, the rotating ring is arranged in the second annular groove, and the top of the ball is attached to the top of the second annular groove.

[0008] Preferably, the anti-cracking assembly includes a pressing ring, an anti-slip pad is arranged at the bottom of the pressing ring, and fixing cones are evenly arranged at the bottom of the pressing ring.

[0009] Preferably, through holes are evenly opened through the top of the anti-slip pad, and the fixing cones are arranged in the through holes.

[0010] Preferably, the pressing ring is arranged at the bottom of the connecting ring, the pressing ring is located at the bottom of the screw head of the large pitch long screw, and the cone head of the fixing cone is located below the anti-slip pad.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] In this utility model, by tightening the long screw with a large pitch, the fixing cone will be driven to insert into the surface of the wooden structure, and the bottom of the anti-slip pad will be closely attached to the surface of the wooden structure. Through the anti-slip pad, the rigid extrusion connection between the screw head of the long screw with a large pitch and the wooden structure can be changed into a flexible extrusion connection, thereby preventing the wooden structure from cracking due to extrusion in the later stage.

[0013] Through the anti-slip pad and the fixing cone, the friction between the screw head of the long screw with a large pitch and the wooden structure can be increased, thereby improving the stability of the long screw with a large pitch after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a long screw with a large pitch for preventing cracking according to this utility model;

[0015] Figure 2 It is a front sectional view of a long screw with a large pitch for preventing cracking according to this utility model;

[0016] Figure 3 For this utility model Figure 2 An enlarged view of part A.

[0017] In the figure: 1. Long screw with a large pitch; 11. Pressure ring; 12. Anti-slip pad; 13. Fixing cone; 14. Connecting ring; 15. Rotating ring; 16. Ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of this utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this utility model.

[0019] Please refer to Figures 1 - 3, an anti-cracking large-pitch long screw, comprising a large-pitch long screw 1. A first annular groove is provided at the bottom of the screw head of the large-pitch long screw 1. The first annular groove is located on the outer ring of the screw rod of the large-pitch long screw 1. A second annular groove is provided at the top of the first annular groove. Wherein: A support assembly is placed in the first annular groove and the second annular groove. An anti-cracking assembly is placed at the bottom of the support assembly. The support assembly includes a connecting ring 14. A rotating ring 15 is fixedly provided at the top of the connecting ring 14. A plurality of balls 16 are evenly embedded at the top of the rotating ring 15. The connecting ring 14 is rotatably arranged in the first annular groove. The rotating ring 15 is rotatably arranged in the second annular groove. The top of the ball 16 is in contact with the top of the second annular groove. The balls 16 assist the connecting ring 14 and the rotating ring 15 to rotate in the first annular groove and the second annular groove. Thus, when the large-pitch long screw 1 is screwed into a wooden structure and the fixing cone 13 contacts the wooden structure, the fixing cone 13 will not rotate as the large-pitch long screw 1 is tightened, but will gradually insert into the wooden structure as the large-pitch long screw 1 is screwed downward. The anti-cracking assembly includes a pressing ring 11. An anti-slip pad 12 is fixedly provided at the bottom of the pressing ring 11. A plurality of fixing cones 13 are evenly fixedly provided at the bottom of the pressing ring 11. A plurality of through holes are evenly formed through the top of the anti-slip pad 12. The fixing cones 13 are fixedly arranged in the through holes. The pressing ring 11 is fixedly arranged at the bottom of the connecting ring 14. When the large-pitch long screw 1 is self-tapped into two wooden structures, the fixing cones 13 will be in contact with the top of the wooden structure. At this time, when the large-pitch long screw 1 is further tightened, it will drive the fixing cones 13 to insert into the surface of the wooden structure and make the bottom of the anti-slip pad 12 closely contact the surface of the wooden structure. The anti-slip pad 12 can change the original hard extrusion connection between the screw head of the large-pitch long screw 1 and the wooden structure into a flexible extrusion connection, thereby preventing the wooden structure from cracking due to extrusion in the later stage. The anti-slip pad 12 and the fixing cones 13 can increase the friction between the screw head of the large-pitch long screw 1 and the wooden structure, thereby improving the stability of the large-pitch long screw 1 after installation. The pressing ring 11 is located at the bottom of the screw head of the large-pitch long screw 1. The cone head of the fixing cone 13 is located below the anti-slip pad 12.

[0020] Working principle: When the large pitch long screw 1 is self-tapping and screwed into two groups of wooden structures, the fixing cone 13 will fit against the top of the wooden structure. The rolling balls 16 assist the connecting ring 14 and the rotating ring 15 to rotate in the first annular groove and the second annular groove. Thus, when the large pitch long screw 1 is screwed into the wooden structure and the fixing cone 13 contacts the wooden structure, the rolling balls 16 can prevent the fixing cone 13 from rotating as the large pitch long screw 1 is tightened. Instead, it will gradually insert into the wooden structure as the large pitch long screw 1 is screwed downward. Therefore, continuously tightening the large pitch long screw 1 will drive the fixing cone 13 to insert into the surface of the wooden structure and make the bottom of the anti-slip pad 12 closely fit against the surface of the wooden structure. Through the anti-slip pad 12, the original rigid extrusion connection between the screw head of the large pitch long screw 1 and the wooden structure can be changed into a flexible extrusion connection, thereby preventing the wooden structure from cracking due to extrusion in the later stage. Through the anti-slip pad 12 and the fixing cone 13, the friction between the screw head of the large pitch long screw 1 and the wooden structure can be increased, thereby improving the stability of the large pitch long screw 1 after installation.

Claims

1. A crack-proof large pitch long screw, characterized in that: include: A large pitch long screw (1), wherein a first annular groove is provided at the bottom of the screw head of the large pitch long screw (1), the first annular groove is located at the outer ring of the screw rod of the large pitch long screw (1), and a second annular groove is provided at the top of the first annular groove, wherein: support components are placed in the first annular groove and the second annular groove, and an anti-cracking component is placed at the bottom of the support component.

2. The anti-cracking large pitch long screw according to claim 1, characterized in that: The support assembly comprises a connecting ring (14), a rotating ring (15) is arranged on the top of the connecting ring (14), and balls (16) are evenly inlaid on the top of the rotating ring (15).

3. The anti-cracking large pitch long screw according to claim 2, characterized in that: The connecting ring (14) is arranged in the first annular groove, the rotating ring (15) is arranged in the second annular groove, and the top of the ball (16) is in contact with the top of the second annular groove.

4. The anti-cracking large pitch long screw according to claim 2, characterized in that: The anti-cracking component comprises a pressure ring (11), an anti-slip pad (12) is arranged at the bottom of the pressure ring (11), and fixing cones (13) are evenly arranged at the bottom of the pressure ring (11).

5. The anti-cracking large pitch long screw according to claim 4, characterized in that: Through holes are evenly opened on the top of the anti-slip pad (12), and the fixing cone (13) is arranged in the through holes.

6. The anti-cracking large pitch long screw according to claim 4, characterized in that: The pressure ring (11) is arranged at the bottom of the connecting ring (14), the pressure ring (11) is located at the bottom of the screw head of the large pitch long screw (1), and the cone head of the fixing cone (13) is located below the anti-slip pad (12).

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