CN1971071A - Expansion screw - Google Patents

Abstract

The invention relates to a novel expanding nail, comprising fastening bolt, expanded tube and inner core. The end of fastening bolt is cap nut. The expanded tube is thin wall casing with open mouth. The inner core is fastener with internal thread and pyramidale, on which a groove is set. The expanded tube is matched with the inner core at the end of open mouth. The fastening bolt is fixed with the inner core. The invention is provided with 1, no external thread part, more reasonable structure, beautiful; 2, convenience usage, shortened fastening time, high efficiency; 3, economy and practicality.

Description

Novel bloated nail

Technical field

The invention belongs to a kind of hardware, particularly a kind of novel bloated nail.

Background technique

At present, develop rapidly along with Building Trade in China, people are more and more exquisite to construction and decoration, various bloated nails are enriching market to satisfy people's needs, and existing bloated pin structure is similar, use when installing more complicated, tradition expands to follow closely and is the outer nut fastening type, tool using is a common wrench, the tightening nut that when some occasions are used, needs spanner one circle circle, comparatively inconvenience is during for example fastening on the wall angle bar, with fastening general every the commentaries on classics down of spanner, the operator need be spent than the long time when tightening nut less than 180 degree; Moreover tradition expands to clench and have long bolt to stay the outside after solid, and is attractive in appearance inadequately.

Technology contents

The purpose of this invention is to provide a kind of novel bloated nail, it has overcome above-mentioned defective, and the operator is shortened the fastening time, and efficient improves, and neat appearance.

Technological scheme of the present invention is: a kind of novel bloated nail, and it is characterized in that: it is made up of clamping bolt, expand tube and inner core, and the clamping bolt end is interior hexagon nut; Expand tube is the opening thin sleeve pipe; Inner core is the internal thread fastening piece of band cone, and has groove on the cone, rotates with bolt to prevent inner core; Expand tube is with opening end and inner core suit; Clamping bolt and inner core are fastening.

Between said clamping bolt and expand tube pad is housed.

The present invention has the following advantages: 1, do not have and expose helical thread portion, more reasonable structure, and neat appearance; 2, easy to use, the fastening time is short, the efficient height.3, economical and practical.

Description of drawings

Accompanying drawing 1: structural representation of the present invention.

Embodiment

As shown in Figure 1: a kind of novel bloated nail is characterized in that: it is made up of clamping bolt 1, expand tube 2 and inner core 3, and clamping bolt 1 end is interior hexagon nut 6; Expand tube 2 is the opening thin sleeve pipe; Inner core 3 is the internal thread fastening piece of band cone, and has groove 4 on the cone; Expand tube 2 is with opening end and inner core 3 suits; Clamping bolt 1 is fastening with inner core 3.

2 of said clamping bolt 1 and expand tubes are equipped with plain cushion 5 and spring pad 7.

Claims (2)

1, a kind of novel bloated nail, it is characterized in that: it is made up of clamping bolt, expand tube and inner core, and the clamping bolt end is interior hexagon nut; Expand tube is the opening thin sleeve pipe; Inner core is the internal thread fastening piece of band cone, and has groove on the cone; Expand tube is with opening end and inner core suit; Clamping bolt and inner core are fastening.

2, a kind of novel bloated nail according to claim 1 is characterized in that: between said clamping bolt and expand tube pad is housed.