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Threaded fastener with short run-outs

A technology for threaded fasteners and fasteners, applied in the direction of threaded fasteners, screws, nuts, etc., can solve the problems of affecting the use effect, unfavorable threads, limiting the effective use length of threads, etc., to achieve simple structure, lengthening and effective use. Length, good effect

Pending Publication Date: 2021-02-12
AVIC STANDARD PARTS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fastener bolts (nails) obtained by turning, grinding, and thread rolling by thread rolling machine will inevitably produce longer thread endings, whether it is ordinary thread ending HB5829-83, MJ thread ending GJB52-85, Unified thread ending E.S.spec.27, etc., the thread ending requirement is ≤2 times the pitch, and the actual fastener thread ending is 1.5-2 times the pitch, which is very unfavorable to the thread assembly process, which limits the effective use length of the thread and affects the use effect

Method used

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  • Threaded fastener with short run-outs
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  • Threaded fastener with short run-outs

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Embodiment Construction

[0017] The specific implementation, structure, features and functions of the short-tailed threaded fastener according to the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0018] see Figure 1 to Figure 4 , the short-tail threaded fastener of the present invention comprises a fastener head 1, a polished rod 2, a thread, and a wrenching groove 4, the fastener head 1 is connected with a polished rod 2, and the thread is arranged at the other end of the polished rod 2, and the thread The end face is provided with a wrench groove 4, wherein: the thread is composed of a ring groove 5, a thread end section 6, a complete thread 3, and a thread guide section 7, and the two ends of the complete thread 3 are respectively connected with a thread end section 6 and a thread guide section 7, and the thread The end of the finishing section 6 is provided with an annular groove 5, and the bottom of the annular groo...

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Abstract

The invention discloses a threaded fastener with short run-outs. The threaded fastener comprises a fastener head (1), a polish rod (2), a thread and a wrenching groove (4), the fastener head (1) is connected with the polish rod (2), the thread is arranged at the other end of the polish rod (2), and the wrenching groove (4) is formed in the end face of the thread. The threaded fastener is characterized in that the thread is composed of an annular groove (5), a thread run-out section (6), a complete thread body (3) and a thread guiding section (7), the thread run-out section (6) and the thread guiding section (7) are connected to the two ends of the complete thread body (3) respectively, the annular groove (5) is formed in the tail end of the thread run-out section (6), the bottom of the annular groove (5) is formed in a mode that an arc section A (8) is tangent to a V-shaped groove, the bottom diameter of the annular groove (5) and the bottom diameter of the thread run-out section (6) are equal to the bottom diameter of the complete thread body(3), and the annular groove (5) and the thread run-out section (6) are connected in a transition mode through an arc section B (9). The threaded fastener has the advantages of being good in effect, high in quality, reliable and suitable for popularization and application of reliable threaded connection.

Description

technical field [0001] The invention belongs to the technical field of fastening devices, and in particular relates to a short threaded fastener. Background technique [0002] As an important part of fastener bolts (nails), threads include three parts: thread leading, thread ending, and complete thread. When the thread is working, it is rotated into the nut or the body through the thread leading part, and the thread end cannot be screwed into the nut or the body, but only the transition area from the thread to the polished rod produced by the manufacturing method. At present, the fastener bolts (nails) obtained by turning, grinding, and thread rolling by thread rolling machine will inevitably produce longer thread endings, whether it is ordinary thread ending HB5829-83, MJ thread ending GJB52-85, Unified thread ending E.S.spec.27, etc., the thread ending requirement is ≤2 times the pitch, and the actual fastener thread ending is 1.5-2 times the pitch, which is very unfavora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/04F16B35/00F16B33/02
CPCF16B33/02F16B35/00F16B35/04
Inventor 严昉赵丽白榕
Owner AVIC STANDARD PARTS MFG
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