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Shear resistant expansion bolt

A technology of expansion bolts and nuts, which is applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problems of bolt breakage, wear of the contact transition area between the bolt body and structural parts, etc., and achieve the effect of improving reliability and eliminating bolt installation gaps

Inactive Publication Date: 2019-01-18
CHINA HELICOPTER RES & DEV INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the structural assembly that mainly realizes the shear connection, due to the existence of the installation gap between the bolt and the connection hole of the structural part, under the action of radial shear load, there will be relative movement between the connecting bolt and the structural part itself, which may cause the bolt body Wearing of the transition zone in contact with the structural part, eventually leading to bolt breakage

Method used

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below by referring to the figures are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application. Embodiments of the pr...

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Abstract

The invention provides a shear resistant expansion bolt, and belongs to the technical field of mechanical structure design. The shear resistant expansion bolt comprises an inner core, an inner seam bushing, an outer seam bushing and a nut; the inner core comprises a rod body of which the outer diameter is changed in the axial direction, an outer threaded segment is connected with the end, with larger outer diameter, of the rod body to adapt to the mounting nut, and a pulling assembly is connected with the end, with smaller outer diameter, of the rod body to pull the rod body in the axial direction; the inner seam bushing sleeves the inner core, the inner diameter of the inner seam bushing is matched with the outer diameter of the rod body of the inner core, and the sizes of the outer diameters of all sections of the inner seam bushing in the axial direction are same; the outer seam busing sleeves the inner seam bushing, and the inner diameter of the outer seam bushing is matched with the outer diameter of the inner seam busing; strip-shaped through holes in the axial direction are formed in the inner seam bushing and the outer seam bushing respectively. The shear resistant expansion bolt structure can eliminate the mounting gap of the bolt, improve the reliability of shear structure assembly, and meet structure assembly requirements of bearing shearing loads.

Description

technical field [0001] The invention belongs to the technical field of mechanical structure design, and in particular relates to a shear-resistant expansion bolt. Background technique [0002] In order to realize the connection between structural parts, bolts, nuts and gaskets are generally used for connection, such as figure 2 shown. In order to facilitate the realization of connection and installation, the outer diameter of the bolt must be smaller than the inner diameter of the connection hole. [0003] For the structural assembly that mainly realizes the shear connection, due to the existence of the installation gap between the bolt and the connection hole of the structural part, under the action of radial shear load, there will be relative movement between the connecting bolt and the structural part itself, which may cause the bolt body Wear occurs in the transition zone in contact with the structural part, eventually leading to bolt fracture. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B13/06
CPCF16B13/065
Inventor 章华赵青王清龙孙文芳雷少保陈少峰邬文强张修坤
Owner CHINA HELICOPTER RES & DEV INST
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