CN202718987U

CN202718987U - Fastening bolt with two expansion ends pushed on same side

Info

Publication number: CN202718987U
Application number: CN 201220166834
Authority: CN
Inventors: 朱明龙
Original assignee: 朱劲荣
Priority date: 2012-04-10
Filing date: 2012-04-10
Publication date: 2013-02-06
Anticipated expiration: 2022-04-10

Abstract

The utility model provides a fastening bolt with two expansion ends pushed on the same side. The fastening bolt is characterized in that an existing pipe with a single expansion lower end is replaced by a pipe with two expansion ends, the lower side of an existing screw cap on a screw rod is manufactured into an inverted circular truncated cone shape, then an expansion bolt is pushed by virtue of the screw rod, so that the lower port of the expansion pipe is promoted to expand, and simultaneously an inverted circular truncated cone body on the screw rod can promote the upper port of the expansion pipe to expand, so that the upper and lower ends of the expansion pipe can tightly clamp the inner wall of a mounting hole, and thus the fastening bolt is prevented from loosing.

Description

Homonymy advances two expansion fastened bolt

Technical field:

The present invention relates to a kind of fastening equipment, especially a kind of homonymy advances two expansion fastened bolt.

Background technique:

Used clamping bolt only has the single expansion in expansion tube lower end at present, when installation, if the internal diameter of mounting hole is too compact, will strengthen difficulty of construction, and all that has been achieved is spoiled even easily screw rod is deflected.If but beat the mounting hole internal diameter more loosely, and again can be in expansion tube upper end with leaving gap between the mounting hole inwall, if the fastener quality is subjected to more greatly or often powerful external impacts, expansion tube can shake, and long-drawn-outly namely may get loose fully.Particularly thinner on the mounting points basis, end liner is when constructing under the environment such as soft soil layer, tends to shift expansion tube onto soft layer, causes expansion hatch not open and becomes invalid installation.

Summary of the invention:

For eliminating the relevant drawback of existing clamping bolt, the invention provides a kind of homonymy and advance two expansion fastened bolt, it is characterized in that expansion tube two can both expand tightly to block mounting hole.The present invention implements with following mode: 1, the upper/lower terminal with interior pushing-type expansion tube all carves the expansion breach; 2, nut downside existing on the interior pushing-type screw rod is made the rounding bench-type, the external diameter on edge is slightly smaller than expansion tube internal diameter suitable for reading under the rounding bench-type, and the external diameter of its upside should be greater than the about 0.3cm of expansion tube internal diameter suitable for reading.Benefit of the present invention is, the mounting hole internal diameter can be beaten a little loosely with convenient construction during installation, and after in the screw rod precession expansion tube, can advance the expansion tube end opening at the expansion bolt that will be preset in the expansion tube, cause expansion tube to block the effect of mounting hole inwall in two up and down expansion tube support distending suitable for reading by the rounding stage body of screw rod upside when making it expand, especially be soft stratum and can't construct the time at the bottom lining layer that the basis is installed, can first expansion tube support distending suitable for reading be blocked the mounting hole inwall, again the expansion bolt in the expansion tube is advanced the expansion tube end opening with it support distending, to finish construction.。

Description of drawings:

Fig. 1 is existing interior pushing-type clamping bolt member schematic representation; Fig. 2 is member schematic representation of the present invention; Fig. 3 is application state sectional view of the present invention.Among the figure, the 1st, the expansion tube end opening, the 2nd, pusher expansion bolt, the 3rd, expansion tube is suitable for reading, and the 4th, screw rod rounding stage body, the 5th, screw flight, the 6th, expansion tube inner thread, the 7th, mounting points basis.

Embodiment:

As shown in Figure 3, in the pusher expansion bolt (2) shown in Fig. 2 pack into expansion tube from expansion tube (3) suitable for reading first, then expansion tube is put into mounting hole from its end opening (1), after shifting expansion tube onto position with corresponding utensil, fastener is put in the top of expansion tube (3) suitable for reading, screw rod is passed through the mount inlet of fastener thereupon, and be combined on screw thread (5) on the screw thread (6) of expansion tube inwall, with the head end of screw rod expansion bolt (2) is headed into expansion tube end opening (1) and impel and expand and block the mounting hole inwall, press expansion tube (3) suitable for reading swollen with the rounding stage body on the screw rod simultaneously and block the mounting hole inwall.

Claims

1. a homonymy advances two expansion fastened bolt, it is characterized in that having comprised expansion tube and screw rod, a subsidiary conventional expansion bolt of using; Expansion tube all is carved with the expansion breach in two ends up and down; The downside of the existing nut of screw rod upper end is made the rounding bench-type; Expansion bolt is positioned in the expansion tube, and advancing expansion bolt to impel the expansion tube end opening to expand with screw rod when, the rounding stage body of existing nut downside can be urged swollen and make two about it can both tightly block the inwall of mounting hole expansion tube is suitable for reading again on the screw rod.