CN206368886U - An internal and external hexagonal cup head screw - Google Patents

Abstract

The utility model discloses an internal and external hexagon cup head screw, comprising a hexagon bolt body, a hexagon socket bolt and a tapered support rod, wherein the tapered support rod is connected to the front end of the hexagon socket bolt, the hexagon socket bolt and the hexagon bolt body are connected through a spiral pair, a countersunk hole is provided at the upper end of the hexagon bolt body, a threaded hole is provided in the middle, and a tapered cavity is provided at the lower end, a long groove is provided at the lower end of the hexagon bolt body, and the direction of the long groove is consistent with the axial direction of the hexagon bolt body, and the tapered cavity is composed of three conical wall surfaces, thereby improving the stability of tightening the fastening bolt and avoiding loosening or falling off under the action of mechanical vibration or alternating load.

Description

An internal and external hexagonal cup head screw

technical field

The utility model belongs to the technical field of fastening screws, in particular, the utility model relates to an inner and outer hexagonal cup head screw.

Background technique

The fastening bolts currently used are all locked and connected by thread engagement, and independent bolts are connected through through holes or threaded holes. Under the action of mechanical vibration or alternating load, the fastening bolts are easy to loosen. If it is not found and tightened in time, it is easy to cause damage to mechanical equipment or cause accidents.

Utility model content

The utility model provides an internal and external hexagonal cup head screw, which improves the stability of fastening bolts and avoids loosening or falling off under the action of mechanical vibration or alternating load.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an inner and outer hexagonal cup head screw, including a hexagonal bolt body, an inner hexagonal bolt and a taper strut, the taper strut is connected to the front end of the hexagonal inner bolt, and the inner The hexagonal bolt is connected with the hexagonal bolt body through a screw pair.

Preferably, the upper end of the hex bolt body is provided with a countersunk hole, the middle is provided with a threaded hole, and the lower end is provided with a tapered cavity.

Preferably, the lower end of the hexagon bolt body is provided with a long groove, and the direction of the long groove is consistent with the axis direction of the hexagon bolt body.

Preferably, the tapered cavity is composed of three conical walls.

The beneficial effect of adopting the above technical scheme is: for the inner and outer hexagonal cup head screws, use a wrench to screw the hexagonal bolt body into the connected structural member, and then use a hexagonal wrench to screw the inner hexagonal bolt through the counterbore hole into the threaded hole, Until the taper strut contacts the taper cavity, then continue to screw the hexagon socket bolt, then the taper strut exerts force on the conical wall surface, and then tensions the hexagonal bolt body and the connected structural parts to improve the stability of the fastening bolt tightening Sex, to avoid loosening or falling off under the action of mechanical vibration or alternating load.

Description of drawings

Fig. 1 is a structural schematic diagram of the inner and outer hexagon cup head screws;

Fig. 2 is A-A sectional view;

Figure 3 is a view from direction B;

in:

1. Hexagon bolt body; 2. Hexagon socket bolt; 3. Tapered strut; 10. Countersunk hole; 11. Threaded hole; 12. Tapered cavity; 13. Long groove; 14. Conical wall.

detailed description

Next, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation of the present utility model will be further described in detail, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present utility model , and contribute to its implementation.

As shown in Figures 1 to 3, the utility model is an internal and external hexagonal cup head screw, which improves the stability of fastening bolts and avoids loosening or falling off under the action of mechanical vibration or alternating loads.

Specifically, as shown in Figures 1 to 3, it includes a hexagonal bolt body 1, an inner hexagonal bolt 2 and a tapered strut 3. Connection, the hexagon socket bolt 2 is connected with the hexagon bolt body 1 through a screw pair.

As shown in FIG. 1 , a countersunk hole 10 is provided at the upper end of the hexagonal bolt body 1 , a threaded hole 11 is provided at the middle, and a taper cavity 12 is provided at the lower end.

As shown in FIG. 1 and FIG. 2 , the lower end of the hexagon bolt body 1 is provided with a long groove 13 , and the direction of the long groove 13 is consistent with the axis direction of the hexagon bolt body 1 . The tapered cavity 12 is composed of three conical walls 14 . The specific working method is set forth below with specific embodiments:

For the inner and outer hexagonal cup head screws, use a wrench to screw the hexagonal bolt body 1 into the connected structural member, and then use a hexagonal wrench to screw the inner hexagonal bolt 2 through the countersunk hole 10 into the threaded hole 11 until the taper strut 3 Contact with the taper cavity 12, then continue to screw the hexagon socket bolt 2, then the taper strut 3 exerts force on the conical wall surface 14, and then tension the hexagon bolt body 1 and the connected structural parts to improve the tightening of the fastening bolts Stability, to avoid loosening or falling off under the action of mechanical vibration or alternating load.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as various insubstantial improvements are carried out by adopting the method concept and technical solutions of the utility model or without improvement, the above-mentioned design and technical solutions of the utility model are directly applied to other occasions, all within the protection scope of the utility model.

Claims (4)

1. a kind of internal-external hexagon hexagonal socket head cap screw, it is characterised in that：Including hex bolts body, hexagon socket head cap screw and taper strut, The taper strut is connected with hexagon socket head cap screw front end, and the hexagon socket head cap screw is connected with hex bolts body by screw pair.

2. a kind of internal-external hexagon hexagonal socket head cap screw according to claim 1, it is characterised in that：The hex bolts body upper end Provided with counter sink, centre is provided with screwed hole, and lower end is provided with taper chamber.

3. a kind of internal-external hexagon hexagonal socket head cap screw according to claim 1, it is characterised in that：Under the hex bolts body End is provided with elongated slot, and elongated slot direction is consistent with the axis direction of hex bolts body.

4. a kind of internal-external hexagon hexagonal socket head cap screw according to claim 2, it is characterised in that：The taper chamber is by three circular cones Wall is constituted.