Thermal expansion and cold contraction limit rivet bolt and connection structure

Abstract

The invention provides a heat-expansion cold-contraction limit rivet and connecting structure. The heat-expansion cold-contraction limit rivet is used for connecting a first part and a second part. The rivet is provided with a fastening sleeve. A metal rivet rod of the rivet is provided with anti-loosening riveting section. Under the action of a tool, the fastening sleeve tightly presses the first part, a fastening sleeve inner hole contracts to tightly wrap outside the anti-loosening riveting section, and a concave-convex inner hole surface matched with anti-loosening stripes on the surface of the anti-loosening riveting section are formed simultaneously to form a welding-free permanent connection. The metal rivet rod is a stepped rod, the height, relative to a raised head, of the thick part of the step corresponds to the total thickness of the first part and the second part which are penetrated by the metal rivet. An antislip positioning structure is further disposed on the raised head side. By the limit rivet, welding-free, loosening-free, permanent and firm connection is achieved, connection strength is increased greatly, anti-seismic requirements are satisfied, and labor and cost can be saved. In addition, the rivet allows one of the to-be-connected object to have a heat-expansion cold-contraction displacement ability.

Description

technical field [0001] The invention relates to a thermal expansion and cold contraction limiting riveting bolt and a connection structure, which are mainly suitable for the riveting of various building curtain walls and various products with high requirements for earthquake resistance and precision. It is especially suitable for the use of curtain walls of building envelopes with high requirements for anti-vibration, anti-slip, and anti-loosening. Background technique [0002] At present, the anchor bolts used in the curtain wall of the building envelope are affected by external forces such as wind fluctuations and thermal expansion and contraction hundreds of thousands of times a year, which will cause the anchors to loosen and the gap between the connecting holes to sag, resulting in accidents. Therefore, in order to prevent the bolts from loosening and the gap between the connecting holes from sagging, the national regulations require that the screw, gasket, nut and the ...

AI Technical Summary

Problems solved by technology

[0002] At present, the anchor bolts used in the curtain wall of the building envelope, due to the impact of hundreds of thousands of wind fluctuations and thermal expansion and contraction every year, will cause the anchors to loosen and the gap between the connecting holes to sag, resulting in accidents

Therefore, in order to prevent the bolts from loosening and the gap between the connecting holes from sagging, the national regulations require that the screw, gasket, nut and the connecting anchor plate be welded to death. However, this welding on the construction site is not only difficult, but also exists Potential safety hazards of desoldering caused by welding on several different materials

[0003] And this kind of connection structure will make the parts that need to have the displacement of thermal expansion and contraction be fixed, so that thermal expansion and cold contraction will not be possible, which will cause hidden dangers to the safety of long-term use

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