Ultra-long bolt

A technology of super-long bolts and bolts, which is applied in the direction of screws, threaded fasteners, connecting components, etc., and can solve problems such as the torsion of the bolt shank, and achieve the effect of solving torsion and simple structure

Inactive Publication Date: 2012-01-18
CHINA NORTH IND GRP NO 70 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a super-long bolt, which solves the problem that the bolt shank is twisted during the tightening process of the super-long bolt

Method used

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Embodiment Construction

[0008] An extra-long bolt, which includes a bolt 2 and a nut 3, and is characterized in that the nut 3 is arranged at the end of one end of the bolt 2, and a keyway is arranged on both sides of the stem of the bolt 2, and a stop key 1 is arranged in the keyway, and the bolt's The length L is 700mm, the bolt diameter D is 10mm, and the distance S between the stop key and the nut is 120mm.

[0009] Processing method: process two small planes on both sides of the bolt shank, process two key grooves on the processed small planes, then select two flat keys, process one side of the flat keys into a plane, and install the flat keys in the key grooves Inside, it just bears against the small plane machined by the bolt, locks the bolt during the tightening process, and does not twist as it is tightened. During the tightening process of the bolt, the two positioning keys lock the bolt. During the tightening process, only the bolt within the S distance bears the torsional shear, and the o...

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Abstract

The invention relates to an ultra-long bolt, which comprises a bolt and a nut, wherein the nut is arranged at the end part of one end of the bolt; key grooves are arranged on two sides at the rod part of the bolt; locking keys are arranged in the key grooves; the length L of the bolt is greater than the diameter D of the bolt by 60 times, i.e., L is greater than 60D; and the distance S between the locking keys and the nut is greater than the diameter D of the bolt by 10 times and is smaller than the diameter D of the bolt by 15 times, i.e., S is greater than 10D but is less than 15D. The ultra-long bolt has a simple structure; and two small planes are processed on the bolt, two key grooves are processed on the small planes, and the locking keys are placed into the key grooves to clamp the bolt, the problem that the rod part of the bolt is twisted along with the screwing in the screwing process of the ultra-long bolt is effectively solved.

Description

[0001] technical field [0002] The invention relates to the field of mechanical structures, in particular to an overlong bolt. Background technique [0003] When developing a new type of engine, an extra-long bolt is needed to connect the body and the cylinder head together. The bolts required greatly exceed the length of the conventional bolts. As a result, during the locking process, as the nuts are tightened, the bolts The shank is twisted together, causing the shank of the bolt to bear a large torsional shear force, which brings great difficulties to the safe use of the bolt. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide an over-long bolt, which solves the problem that the bolt shank is twisted during the tightening process of the over-long bolt. [0005] The technical scheme of the present invention: an extra-long bolt, which includes a bolt and a nut, and is characterized in that the nut is arranged at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/00
Inventor 李旭东马军华魏志明谭建松
Owner CHINA NORTH IND GRP NO 70 RES INST
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