A high fastening screw

Abstract

The utility model discloses a high-tightening screw, comprising a screw end and a screw shank, wherein a protrusion is arranged on the outer periphery of one end of the screw shank near the screw end, a fixing groove is arranged in the middle of the screw end toward one side of the screw shank, and a first through groove and a second through groove are respectively arranged on the protrusion and one end of the screw shank near the protrusion, which are connected to the fixing groove and the outside, and a limiting block with a C-shaped cross section is arranged in the first through groove and the second through groove, and the upper and lower ends of the limiting block are respectively used to resist the gasket and the threaded groove connected to the screw shank, and a positioning piece is also arranged in the fixing groove, and the positioning piece is used to limit the limiting block. The utility model arranges a through groove and a limiting block on the screw end and the screw shank near the screw end, so as to increase the connection stability with the gasket and the threaded hole, thereby improving the fastening performance of the overall connection of the screw.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a high-tightening screw. Background Art

[0002] Screws are one of the common fasteners. When tightening, the existing screws are easily reversed and withdrawn when subjected to reverse rotational force after being screwed into the internal threaded tube. This affects the installation stability. The existing utility model patent with application number 202022228722.6 discloses a high-strength fastening screw, which increases the fastening performance by adding a clamping screw and a tapered threaded rod. However, the tapered threaded rod structure in the overall structure is arranged inside the screw, the design is relatively complicated, and there is a problem of difficulty in structural arrangement. Utility Model Content

[0003] The utility model aims to provide a screw structure with simple structure and high fastening performance in view of the deficiencies existing in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions for a high-tightening screw:

[0005] A high-tightening screw comprises a screw end and a screw rod, wherein a protrusion is provided on the outer periphery of one end of the screw rod close to the screw end, a fixing groove is provided in the middle of the screw end toward one side of the screw rod, the protrusion and one end of the screw rod close to the protrusion are respectively provided with a first through groove and a second through groove connecting the fixing groove with the outside, a limit block with a C-shaped cross-section is provided in the first through groove and the second through groove, the upper end and the lower end of the limit block are respectively used to resist the gasket and the threaded groove connected to the screw rod, a positioning piece is also provided in the fixing groove, and the positioning piece is used to limit the limit block.

[0006] A further improvement of the high-tightening screw of the utility model is that two groups of the first through-groove, the second through-groove and the limit block are arranged symmetrically.

[0007] A further improvement of the high-tightening screw of the utility model is that the positioning piece is cylindrical, the positioning piece is hollow, two sets of extension plates are provided at the lower end of the positioning piece, the extension plates abut against the limit blocks, and an embedded piece is provided in the hollow part of the positioning piece, the embedded piece penetrates into the fixing groove and abuts against the bottom of the fixing groove and abuts against the extension plate.

[0008] A further improvement of the high-tightening screw of the utility model is that a thread is arranged on the upper part of the fixing groove, the embedding piece is T-shaped, and the upper part of the embedding piece is threadedly connected with the upper part of the fixing groove.

[0009] A further improvement of the high-tightening screw of the utility model is that the embedded part is lower than the upper end surface of the screw end after it abuts against the bottom of the fixing groove.

[0010] A further improvement of the high-tightening screw of the utility model is that the upper end of the limit block extends out of the first through slot, an elastic piece is arranged at the upper end of the limit block, and the lower end of the limit block is a reverse thread end.

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

[0012] The utility model provides a through groove and a limit block on the screw end and the screw rod near the screw end, so as to increase the connection stability with the gasket and the threaded hole, thereby improving the fastening performance of the overall screw connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] In the figure: 1 screw end, 2 screw rod, 3 protrusion, 4 fixing groove, 5 limit block, 6 positioning piece, 7 extension plate, 8 embedding piece, 9 reverse thread end. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 As shown, a high-tightening screw includes a screw end 1 and a screw shank 2. A protrusion 3 is provided on the outer periphery of one end of the screw shank near the screw end, and the protrusion is integrally formed with the screw end and the screw shank. A fixing groove 4 is provided in the middle of the screw end toward one side of the screw shank, and the fixing groove extends into the screw shank. The protrusion and the end of the screw shank near the protrusion are respectively provided with a first through groove and a second through groove connecting the fixing groove with the outside. The first through groove and the second through groove are provided with a limit block 5 with a C-shaped cross-section. The upper and lower ends of the limit block are respectively used to resist the gasket and the threaded groove connected to the screw shank. A positioning member 6 is also provided in the fixing groove, and the positioning member is used to limit the limit block. Preferably, the first through groove, the second through groove, and the limit block are provided in two groups, which are symmetrically arranged.

[0017] Furthermore, the positioning member is in a hollow cylindrical shape, and two sets of extension plates 7 are provided at the lower end of the positioning member, the extension plates abut against the limit blocks, and the extension plates have a certain plasticity relative to the positioning member. An insert 8 is provided in the hollow part of the positioning member, and the insert goes deep into the fixing groove to abut against the bottom of the fixing groove and abut against the extension plate.

[0018] The upper part of the fixing groove is provided with a thread, the embedded part is T-shaped, the upper part of the embedded part is screwed with the upper part of the fixing groove, and the embedded part is lower than the upper end surface of the screw end after it abuts against the bottom of the fixing groove.

[0019] Furthermore, the upper end of the limit block extends out of the first through groove, an elastic member is provided at the upper end of the limit block, and the lower end of the limit block is a reverse thread end 9.

[0020] The working principle of the utility model is as follows: a limit block is arranged at the first and second through grooves, the width of the limit block is smaller than the width of the fixing groove, a positioning piece is inserted so that the extension plate abuts against the limit block, then a gasket is arranged, and the screw is connected to the connected threaded hole. After the connection is in place, an embedded piece is used to insert the fixing groove, and the limit block is limited as a whole, so that the upper end of the limit block abuts against the gasket, and the reverse threaded end of the lower end abuts against the threaded hole, thereby achieving the overall stability of the screw.

[0021] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-tightening screw, characterized in that: It includes a screw end and a screw rod, wherein a protrusion is provided on the outer periphery of one end of the screw rod close to the screw end, a fixing groove is provided in the middle of the screw end toward one side of the screw rod, and a first through groove and a second through groove are respectively provided on the protrusion and the end of the screw rod close to the protrusion for connecting the fixing groove with the outside, and a limit block with a C-shaped cross-section is provided in the first through groove and the second through groove, and the upper and lower ends of the limit block are respectively used to resist the gasket and the threaded groove connected to the screw rod, and a positioning piece is also provided in the fixing groove, and the positioning piece is used to limit the limit block.

2. A high-tightening screw according to claim 1, characterized in that: The first through groove, the second through groove and the limit block are provided in two groups and are arranged symmetrically.

3. A high-tightening screw according to claim 2, characterized in that: The positioning member is cylindrical and hollow. Two groups of extension plates are arranged at the lower end of the positioning member, and the extension plates abut against the limit blocks. An embedded member is arranged in the hollow part of the positioning member, and the embedded member goes deep into the fixing groove to abut against the bottom of the fixing groove and abut against the extension plate.

4. A high-tightening screw according to claim 3, characterized in that: The upper part of the fixing groove is provided with a thread, the embedded part is T-shaped, and the upper part of the embedded part is threadedly connected with the upper part of the fixing groove.

5. A high-tightening screw according to claim 4, characterized in that: After the embedded part abuts against the bottom of the fixing groove, it is lower than the upper end surface of the screw end.

6. A high-tightening screw according to claim 5, characterized in that: The upper end of the limit block extends out of the first through groove, an elastic member is arranged at the upper end of the limit block, and the lower end of the limit block is a reverse thread end.

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