CN203670387U - Screw structure - Google Patents

Abstract

The utility model discloses a screw structure. The screw structure comprises a nut part and a bolt part, wherein the bolt part comprises a screw rod and a screw cap; a conical groove is formed in the front end of the screw rod; the nut part comprises a nut with inner threads, and a nut cap fixed to one end of the nut; the diameter of the threads, close to the nut cap, inside the nut is greater than the diameter of the threads, close to an opening, inside the nut; the middle of the nut cap is provided with a conical protrusion of which the diameter is slightly greater than the diameter of the conical groove. The length of the nut is close to the length of the screw rod. The screw cap and the nut cap are the same in size. In the process of screwing the bolt into the nut, the conical protrusion arranged on the nut part enters the conical groove formed in the bolt part, and as the diameter of the conical protrusion is greater than the diameter of the conical groove, the bolt part is promoted to expand, and the bolt and the nut are locked tightly. As the screw cap and the nut cap are the same in size, the screw structure can play a role of a rivet.

Description

A kind of screw structural

Technical field

The utility model belongs to five metals field, particularly a kind of screw.

Background technique

Screw, also someone is its " screw " [Screw] (screw), " screw rod " (lead screw).Screw is common name in fact, and screw, lead screw are all distinguishing mutually.Screw is generally WOOD SCREWS; Be that front end is acuminous that, pitch is larger, is generally used for fastening ligneous piece, working of plastics.Lead screw is machine screw (MACHINE SCREWS), is that of front end tack, and pitch is less, evenly, is generally used for fastening metal, machine part.Rivet: in riveted joint, utilize self deformation or interference to connect by the part of riveting parts.Rivet kind is a lot, and informal.Conventional have cup head, tack, semitubular rivet, solid rivet, sunk head rivet, self-plugging rivet, a tubular-shank rivet, and these normally utilize self deformation to connect by riveting parts.Be generally less than the cold riveting of using of 8 millimeters, be greater than the rivet hot of using of this size.But also there is exception, such as the nameplate on three ring locks, utilize the magnitude of interference riveted joint of rivet and lock body opening.

Summary of the invention

Main purpose of the present utility model is to provide a kind of screw structural of similar rivet.

For achieving the above object, the technical solution of the utility model is: screw structural, comprises nut portion and bolt part; Bolt part is divided and is comprised screw rod and spiro rod cap, the front end of described screw rod has a cone-shaped groove, described nut portion comprises female nut and is fixed on the nut cap of nut one end, in nut, be greater than near the diameter of the screw thread in nut inner opening place near the diameter of nut cap part screw thread, nut cap middle part has a diameter to be slightly larger than the conical projections of described cone-shaped groove.

As optimization, the threaded length of the length of described nut approaches.Described spiro rod cap is identical with described nut cap size.

The utility model screw structural, be screwed in the process of nut at bolt, the conical projections of nut portion setting enters the cone-shaped groove that bolt part is divided setting, impels bolt demi-inflation because conical projections diameter is greater than cone-shaped groove, thereby makes screw bolt and nut locking.Spiro rod cap is identical with described nut cap size, can play the effect of rivet.

Accompanying drawing explanation

Fig. 1 is the utility model screw structural structural representation.

Embodiment

The utility model is described in further detail for embodiment's plan given below; but can not be interpreted as it is the restriction to the utility model protection domain; those skilled in the art to nonessential improvement and adjustment more of the present utility model, still belong to protection domain of the present utility model according to the utility model content.

Screw structural, as shown in Figure 1, comprises nut portion and bolt part; Bolt part is divided and is comprised screw rod 1 and spiro rod cap 2, the front end of described screw rod 1 has a cone-shaped groove 3, described nut portion comprises female nut 4 and is fixed on the nut cap 5 of nut 4 one end, the interior diameter near nut cap 5 part screw threads of nut 4 is greater than near the diameter of the screw thread in nut 4 inner opening places, and nut cap 5 middle parts have a diameter to be slightly larger than the conical projections 6 of described cone-shaped groove 3.Threaded 1 length of length of described nut 4 approaches.Described spiro rod cap 2 is identical with described nut cap 5 sizes.

Claims (3)

1. a screw structural, comprises nut portion and bolt part; Bolt part is divided and is comprised screw rod and spiro rod cap, the front end that it is characterized in that described screw rod has a cone-shaped groove, described nut portion comprises female nut and is fixed on the nut cap of nut one end, in nut, be greater than near the diameter of the screw thread in nut inner opening place near the diameter of nut cap part screw thread, nut cap middle part has a diameter to be slightly larger than the conical projections of described cone-shaped groove.

2. according to the screw structural described in claim 1, it is characterized in that the threaded length of length of described nut approaches.

3. according to the screw structural described in claim 1, it is characterized in that described spiro rod cap is identical with described nut cap size.

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