CN2639603Y

CN2639603Y - Large force expansion tube bolt

Info

Publication number: CN2639603Y
Application number: CN 03259486
Authority: CN
Inventors: 马志龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-08
Filing date: 2003-07-08
Publication date: 2004-09-08
Anticipated expiration: 2013-07-08

Abstract

The utility model discloses a vigorous expansion tube bolt inside of a fastening piece, comprising an expansion pipe, an expansion screw, and a locknut; wherein, a stop thorn is positioned on the outer wall of the expansion pipe; the expansion screw is provided with a threaded section and an expansion blot; the expansion blot of the expansion screw comprises a plurality of stop ladder teeth; the stop ladder teeth is provided with a scotch raised head; a stop ladder tooth engaged with the stop ladder tooth of the expansion screw is positioned at the inner wall of the expansion pipe; the whole expansion pipe is provided with longitudinal slitting, and the scotch raised head can extend into the longitudinal slitting. By virtue of the body section expansion namely overall expansion, the connection between the expansion pipe and the expansion hole-wall is very firm while is not likely to shake, loose and rotate. The utility model has the advantages of heavy acting force stick ability and easy operation.

Description

Expansion tube bolt energetically

Technical field

The utility model relates to a kind of fastening piece, especially expansion fastener.

Background technique

Existing expansion tube bolt, the bottom distending of its expansion tube partly has one section to crack, so that this part distending under the expansion bolt effect of screw rod, with the hole wall anchoring of bloated hole.Owing to have only the differential expansion of expansion tube, make between the unexpansive part of expansion tube and the bloated hole hole wall to have the space, therefore, EXPANSION ANCHOR BOLTS is easily shaken, and easily loosening, strength is little.For example Chinese patent CN2505636Y discloses a kind of like this structure, in this structure, though also be provided with some hangnails on the outer tube wall of expansion tube, but because hangnail is located at the unexpansive position of expansion tube mostly, hangnail is taken root shallow in the hole wall of bloated hole, be unable to undergo big load force effect, still exist easily and extract out, the shortcoming that expansion tube easily rotates in the locking process.

Summary of the invention

The purpose of this utility model is to provide a kind of and bloated hole hole wall to combine firmly, the expansion tube bolt that strength is big.

The technological scheme that realizes above-mentioned purpose is: a kind of bolt of expansion tube energetically, have expansion tube, expansive screw and locking nut, the outer wall of expansion tube is provided with the stop thorn, expansive screw has thread section and expansion bolt, the expansion bolt of expansive screw is to be made of some stop tooths, and stop tooth is provided with the spline plush copper, and the expansion tube inner tubal wall is provided with the stop tooth that engages with the stop tooth of expansive screw, the full section of expansion tube has vertically cracks, and the spline plush copper can be stretched in vertically cracking.

After adopting above-mentioned technical pattern, owing to have the stop tooth that can engage mutually on expansive screw and the expansion tube, and the full section of expansion tube has vertically and cracks, therefore expansion tube full section under the effect that the stop tooth on the expansion bolt of expansive screw advances expands, it also is bulk expansion, like this, stop thorn on the expansion tube outer wall can deeply expand in the hole wall of hole all, thereby expansion tube takes root deeply, and the zone of action is long, combines firmly with bloated hole hole wall, be difficult for shaking, be difficult for loosening and difficult the rotation, can bear big active force, and against shock coefficient height; Simultaneously the spline plush copper on the expansive screw is stretched in vertically the cracking of expansion tube, and can prevent that expansive screw from rotating relative to managing.In addition, the distending of expansion tube is the propelling layer by layer by some stop tooths on the expansion bolt of expansive screw, thereby as long as hit and towards tight expansive screw, has changed the mode of operation that the local distending of expansion tube in the past leans on nutting, greatly facilitates operation.

Description of drawings

Fig. 1 is the bolt of an expansion tube energetically external structure schematic representation of the present utility model;

Fig. 2 is a linkage structure schematic representation of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

As shown in Figure 1, 2, the bolt of expansion tube energetically of the present utility model, have expansion tube 1, expansive screw 2 and locking nut 3, the outer wall of expansion tube 1 is provided with stop thorn 1-1, expansive screw 2 has thread section 2-1 and expansion bolt 2-2, the expansion bolt 2-2 of expansive screw 2 is made of some stop tooth 2-2-1, stop tooth 2-2-1 is provided with spline plush copper 4, expansion tube 1 inner tubal wall is provided with the stop tooth 1-3 that engages with the stop tooth 2-2-1 of expansive screw 2, expansion tube 1 full section has the 1-2 that vertically cracks, and spline plush copper 4 can be stretched in the 1-2 that vertically cracks.

As shown in Figure 2, accurately insert in vertically the cracking of expansion tube 1 in order to make the spline plush copper 4 on the expansion rod screw rod 2, the stop tooth 2-2-1 end of expansive screw 2 is provided with the mark of axially aligning with spline plush copper 45.

As shown in Figure 2, in order not damage thread section 2-1 towards tight expansive screw 2 time, the thread section 2-1 top of expansive screw 2 has pit 2-3.

In order to cooperate with bloated hole hole wall better, the stop thorn 1-1 on the outer wall of expansion tube 1 is even layout at whole section tube wall.

Certainly, also not bidding note 5 and pit 2-3 of the utility model.

When the utility model uses, as shown in Figure 2, will bore earlier and beat bloated hole, bloated hole depth preferably is not more than the length of expansion tube 1, and bloated bore dia is preferably near the diameter of expansion tube 1, remove rubbish in the hole of expanding, be preferably in the hole of expanding and push bottom spacer 6, put into expansion tube 1 again, the effect of bottom spacer 6 is to make expansion tube 1 front end against bottom spacer 6, and do not head in the wall soil, and keep expansion tube 1 smooth in the hole of expanding.Advise oiling on the stop tooth 2-2-1 of expansive screw 2 then, spline plush copper 4 is aimed at the 1-2 that vertically cracks of expansion tube 1, then knock the pit 2-3 on thread section 2-1 top with instrument, the whole or big portion of stop tooth 2-2-1 on the expansion bolt 2-2 of expansive screw 2 is engaged with the stop tooth 1-3 of expansion tube 1, at this moment, sink under the hole end surface that expands if find expansion tube 1, should install pad 7 additional, tighten locking nut 3 again.

Claims

1, a kind of bolt of expansion tube energetically has expansion tube (1), expansive screw (2) and locking nut (3), and the outer wall of expansion tube (1) is provided with stop thorn (1-1), and expansive screw (2) has thread section (2-1) and expansion bolt (2-2), it is characterized in that:

The expansion bolt (2-2) of a, expansive screw (2) is to be made of some stop tooths (2-2-1),

B, stop tooth (2-2-1) are provided with spline plush copper (4),

C, expansion tube (1) inner tubal wall are provided with the stop tooth (1-3) that engages with the stop tooth (2-2-1) of expansive screw (2),

D, the full section of expansion tube (1) have vertically crack (1-2),

E, spline plush copper (4) can be stretched in vertically crack (1-2).

2, the bolt of expansion tube energetically according to claim 1 is characterized in that: stop tooth (2-2-1) end of expansive screw (2) is provided with the mark of axially aligning with spline plush copper (4) (5).

3, the bolt of expansion tube energetically according to claim 1 is characterized in that: thread section (2-1) top of expansive screw (2) has pit (2-3).

4, according to claim 1 or the 2 or many 3 described bolts of expansion tube energetically, it is characterized in that: the stop thorn (1-1) on the outer wall of expansion tube (1) is even layout at whole section tube wall.