CN206338304U8 - A kind of Combined screw - Google Patents

Abstract

The utility model provides a kind of Combined screw, including screw and the screw terminal cap covered on the screw head, the die that the screw terminal cap bottom includes being located in the middle of the screw terminal cap bottom and matched with the screw head dummy, and the annular outer cover being connected with counter sink inner wall sealing, the screw head dummy is interference fitted with the die, the die and shell connection integrated with the screw terminal cap bottom, the outer shell outer wall includes at least two semicolumns for being evenly distributed on the outer shell outer wall, semicolumn connection integrated with the outer shell outer wall.The utility model is simple in construction, and assembly and disassembly are easy, can protect screw well while preventing screw from releasing.

Description

a combined screw

technical field

The utility model relates to the technical field of fasteners, in particular to a combined screw.

Background technique

[0002] Screws are used in various fields for fixing two parts. In the field of mechanical equipment, some equipment or parts work in harsh environments, which may easily corrode screws, reduce their lifespan or even destroy their functions. In addition, in an environment with frequent vibrations, the screws are easy to loosen, and the traditional method is to apply glue, but it is difficult to remove once the glue has solidified. Utility model content

The purpose of this utility model is to propose a kind of combined screw with strong anti-corrosion and can prevent the screw from loosening.

Achieve above-mentioned purpose by following technical scheme:

The utility model provides a kind of combined screw, comprises screw and the screw head cap piece that is covered on described screw head, and described screw head cap piece bottom comprises and is located in the middle of the bottom of described screw head cap piece and is connected with all the screw head cap pieces. The mold core matched with the screw head type, and the annular shell sealingly connected with the inner wall of the countersunk hole, the screw head type and the mold core are interference fit, and the mold core and the shell are connected with the bottom of the screw head cap. For integrated connection, the outer wall of the casing includes at least two semi-cylinders evenly distributed on the outer wall of the casing, and the semi-cylinders are integrally connected with the outer wall of the casing.

[0006] By adopting the above-mentioned technical scheme, a threaded hole with a countersunk hole is opened, and the screw is first tightened into the threaded hole. Then, the outer wall of the countersunk head hole is provided with a groove that matches the semi-cylindrical shell of the screw head cap, and then the screw head cap is pressed into the countersunk hole. The type forms a static connection, the outer wall of the screw head cap piece is in interference fit with the inner wall of the countersunk head hole, and the half cylinder of the outer wall of the screw head cap piece fits with the slot of the countersunk head hole, which isolates the screw from the outside world through the screw head cap piece. At the same time, the screw head is statically connected with the screw head cap, and the screw head cap is statically connected with the countersunk hole, so as to prevent the screw from loosening.

Preferably, described screw head cap part top surface is smooth surface.

By adopting the above-mentioned technical scheme, the screw head cap is pressed into the countersunk hole, and when dismantling, the smooth top surface of the screw head cap is sucked tightly by vacuum, and is taken out smoothly.

The beneficial effects of the present invention are: through the above structure, the screw is isolated from the outside world by the screw head cap piece. At the same time, the semi-cylinder on the outer wall of the screw head cap prevents the screw head cap from rotating, and the mold core of the screw head cap is matched with the screw head shape, so as to prevent the screw from loosening. The utility model has the advantages of simple structure, easy assembly and disassembly, and can well protect the screws and prevent the screws from loosening.

Description of drawings

Fig. 1 is the utility model overall structure half-section view;

Fig. 2 is the sectional view of the screw head cap part of the present utility model.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:

As shown in Fig. 1 to Fig. 2, a kind of combined screw, comprises screw 1 and the screw head cap 2 that is covered on the head of described screw 1, and the bottom of described screw head cap 2 includes being located in described screw The mold core 21 in the middle of the bottom of the head cap and matching the screw head shape, and the annular casing 22 sealed with the inner wall of the countersunk hole, the screw 1 head shape and the mold core 21 are in an interference fit, and the mold core 21 has an interference fit. The kernel 21 and the outer shell 22 are integrally connected with the bottom of the screw head cap 1. The outer wall of the outer shell 22 includes at least two semi-cylinders 221 evenly distributed on the outer wall of the outer shell. The outer shell wall 22 is integrally connected.

[0014] By adopting the above-mentioned technical scheme, the threaded hole of the countersunk hole is opened, and the screw is first tightened into the threaded hole. Then, the outer wall of the countersunk head hole is provided with a groove that matches the semi-cylindrical shell of the screw head cap, and then the screw head cap is pressed into the countersunk hole. The type forms a static connection, the outer wall of the screw head cap piece is in interference fit with the inner wall of the countersunk head hole, and the half cylinder of the outer wall of the screw head cap piece fits with the slot of the countersunk head hole, which isolates the screw from the outside world through the screw head cap piece. At the same time, the screw head is statically connected with the screw head cap, and the screw head cap is statically connected with the countersunk hole, so as to prevent the screw from loosening.

Preferably, described screw head cap piece 2 top surface is smooth surface.

By adopting the above-mentioned technical scheme, the screw head cap is pressed into the countersunk hole, and when dismantling, the smooth top surface of the screw head cap is sucked tightly by vacuum, and is taken out smoothly.

The above does not limit the technical scope of the present invention, any modification, equivalent variation and modification made to the above embodiment according to the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims (2)

1. A combined screw, characterized in that it comprises a screw and a screw head cap covering the screw head, and the bottom of the screw head cap comprises a screw head cap that is located in the middle of the bottom of the screw head cap and is connected to the screw head cap. The mold core matched with the screw head type, and the annular shell sealingly connected with the inner wall of the countersunk hole, the screw head type is in an interference fit with the mold core, and the mold core and the shell are integrated with the bottom of the screw head cap. The outer wall of the casing includes at least two semi-cylinders evenly distributed on the outer wall of the casing, and the semi-cylinders are integrally connected with the outer wall of the casing. 2. a kind of combined screw according to claim 1 is characterized in that: the top surface of described screw head cap is smooth surface.