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One-way bolt

A one-way bolt and screw technology, applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problems of unstable installation of steel structures and low connection rigidity, and achieve enhanced connection strength and connection reliability, high connection strength, compact effect

Pending Publication Date: 2022-02-08
无锡周博建筑设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a one-way bolt, which overcomes the deficiencies of the prior art and solves the problem that when the existing one-way bolts connect steel structures, the hole diameter of the steel plate is usually required to be slightly larger than the diameter of the screw rod. Some, resulting in the screw head screw sleeve and nut rotating with the rotation of the screw during the tightening process, which is commonly referred to as the problem of follow-up rotation, resulting in unstable installation of the steel structure and low connection stiffness; In the present invention, the front end of the cone screw sleeve is provided with a positioning keyway for fixing the cone screw sleeve itself in the workpiece hole. When the one-way bolt is installed, the pin key is used to clamp the positioning keyway, and the cone screw sleeve is locked with the steel structure. , to prevent the taper nut from rotating with the screw in the steel plate hole; by setting a dovetail key on the tapered end of the taper nut, and setting a limit opening slot on the dovetail end of the nut, the dovetail key is snapped The limit opening groove locks the conical head screw sleeve and the nut in a limited position, and prevents the nut from rotating with the screw in the steel plate hole, thereby improving the stability of the steel structure installation and enhancing the connection rigidity; the conical head screw sleeve and the dovetail The nut is connected through the dovetail key and the dovetail limit opening groove. The dovetail limit opening groove and the dovetail key expand with the rotation of the screw, and the tapered screw sleeve, the dovetail nut and the steel plate hole cooperate more and more when the screw is twisted. The connection strength and connection reliability of the one-way bolts are further enhanced; the design of the invention is reasonable and the structure is compact. When in use, the taper screw sleeve and the dovetail nut are clamped with each other and fixed with the steel structure, and the screw is twisted. The taper head nut and the dovetail nut will not rotate at the same time, as long as the hexagonal screw head is twisted outside, the tightening effect will be achieved; the dovetail of the dovetail nut will expand and become tighter and tighter during the twisting process. The connection strength to the bolt is high, the connection effect is good, and the practicability is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: The front end of the cone head screw sleeve 2 is integrally formed with a semicircular key 2.1 for fixing the cone head screw sleeve 2 itself in the steel plate hole, and the cone head screw sleeve 2 is clamped and fixed with the steel structure X to avoid The cone head screw sleeve 2 rotates with the rotation of the screw rod 1 in the steel plate hole;

[0038] The end of the conical head screw sleeve 2 is set as a conical end, which is convenient to cooperate with the expansion of the dovetail nut 3, and the upper ring of the conical end is provided with several dovetail keys 2.3;

[0039] The front end of the dovetail nut 3 is provided with an expandable dovetail end, and the dovetail end is provided with the same number as the dovetail key 2.3 and the limit opening groove 3.1 corresponding to the dovetail key 2.3, through which the dovetail key 2.3 is clamped to the limit opening The groove 3.1 fixes the conical head screw sleeve 2 and the dovetail nut...

Embodiment 2

[0040] Embodiment 2: The front end of the cone-head screw sleeve 2 is integrally formed with a semi-circular key 2.1 for fixing the cone-head screw sleeve 2 itself in the steel plate hole, and the cone-head screw sleeve 2 is clipped and fixed with the steel structure X to avoid The cone head screw sleeve 2 rotates with the rotation of the screw rod 1 in the steel plate hole;

[0041] The end of the conical head screw sleeve 2 is set as a conical end, which is convenient to cooperate with the expansion of the dovetail nut 3. On the conical end, a number of radially piercing pins 2.4 can also be arranged around the conical end. The front end of the dovetail nut 3 is provided with an expandable The dovetail end of the dovetail end is provided with the same number as the pin 2.4 and the limit opening groove 3.1 corresponding to the clamping pin 2.4, and the conical head screw sleeve 2 and the dovetail nut 3 are limited The position is fixed to prevent the dovetail nut 3 from rotat...

Embodiment 3

[0042] Embodiment 3:: the front end of described conical head screw sleeve 2 can also be provided with the location keyway 2.2 that uses pin key to insert, is used to fix the conical head screw sleeve 2 itself in the steel plate hole, uses pin key when screw rod 1 is installed Clamp the positioning keyway 2.2, and fix the cone-head screw sleeve 2 with the steel structure X, so as to prevent the cone-head screw sleeve 2 from following the rotation of the screw rod 1 in the steel plate hole;

[0043] The end of the conical head screw sleeve 2 is set as a conical end, which is convenient to cooperate with the expansion of the dovetail nut 3, and the upper ring of the conical end is provided with several dovetail keys 2.3;

[0044] The front end of the dovetail nut 3 is provided with an expandable dovetail end, and the dovetail end is provided with the same number as the dovetail key 2.3 and the limit opening groove 3.1 corresponding to the dovetail key 2.3, through which the dovet...

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PUM

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Abstract

The invention relates to the technical field of one-way bolts, and provides a one-way bolt. The one-way bolt comprises a screw rod and a conical head thread sleeve arranged on the screw rod in a sleeving mode, wherein a dovetail key is arranged on the conical head thread sleeve; when the one-way bolt works, the dovetail key on the conical head thread sleeve can be clamped in a dovetail groove of a dovetail nut; and the front end of the dovetail conical head thread sleeve is provided with a dovetail groove used for clamping the conical head dovetail key. During installation, a protruding woodruff key of a straight section of the conical head threaded sleeve is locked in a steel plate pin hole, the conical head threaded sleeve and the dovetail nut cannot rotate, and screwing effect can be achieved only by screwing a threaded rod outside in a one-way mode; and the dovetail of the dovetail nut can expand and can become tighter and tighter in a screwing process, and the connection strength of the one-way bolt is reliable and stable. The one-way bolt comprise a high-strength bolt and a non-high-strength bolt. According to the one-way bolt, a blank in the prior art is filled in, a design is reasonable, a structure is compact, the one-way bolt is high in connection strength, the connection effect is good, the application range of the bolt is wide, and high practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of bolts, in particular to a one-way bolt. Background technique [0002] One-way bolts, also known as blind eye bolts or one-sided locking bolts, can be installed on one side and tightened on one side. One-way bolts are divided into high-strength bolts and non-high-strength bolts. One-way bolts are suitable for the connection of steel structures. [0003] When traditional one-way bolts are used to connect steel structures, the diameter of the steel plate hole is usually required to be slightly larger than the diameter of the screw, which will cause a conical head screw sleeve and nut to rotate with the rotation of the screw during the tightening process of the screw, which is normal The so-called follow-up problem leads to unstable installation of the steel structure and low connection rigidity. [0004] For this purpose, we propose a one-way bolt. Contents of the invention [0005] (1) Solved technical ...

Claims

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Application Information

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IPC IPC(8): F16B13/06
CPCF16B13/066
Inventor 周波刘康平白晓民赵金强邹建新周枭张唯唯张伯成杜贝贝刘帅
Owner 无锡周博建筑设计有限公司