CN201080946Y

CN201080946Y - Expanding bolt

Info

Publication number: CN201080946Y
Application number: CNU200720172876XU
Authority: CN
Inventors: 冯雪峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-30
Filing date: 2007-08-30
Publication date: 2008-07-02
Anticipated expiration: 2017-08-30

Abstract

The utility model discloses an expansion bolt which consists of a nut, a screw rod and an expansion sleeve. The nut is covered on the top of the screw rod, the tail end of the screw rod is a cone-shaped body, wherein, the upper part of the screw rod is provided with a cone-shaped body, the expansion sleeve is arranged between the cone-shaped body of the tail end of the screw rod and the cone-shaped body on the upper part, both ends of the expansion sleeve are provided with a plurality of openings. The expansion bolt of the utility model has firm connection with walls or the ground, the force-bearing point is not easy to lose effect and the screw rod of the screw can not drop into the wall hole.

Description

EXPANSION ANCHOR BOLTS

Technical field

The utility model relates to a kind of fastening piece, refers to a kind of EXPANSION ANCHOR BOLTS especially.

Background technique

Traditional expansion bolt as shown in Figure 1, it is made up of nut 1 ', screw rod 2 ' and expansion sleeve 3 ', nut 1 ' is placed in screw rod 2 ' top, the afterbody 21 ' of screw rod 2 ' is a taper, and expansion sleeve 3 ' is enclosed between the afterbody 21 ' and nut 1 ' of screw rod 2 ', during use, expansion sleeve and screw rod are put into pre-drilled within the walls hole, Deng installing when needing fixing parts, use nut fastening again, there is following shortcoming in traditional expansion bolt:

1, the EXPANSION ANCHOR BOLTS inner end is produced a stay bolt effect during tightening nut 1 ', the expansion sleeve 3 ' of this EXPANSION ANCHOR BOLTS is strutted, this process makes EXPANSION ANCHOR BOLTS form inside and outside two force bearing points at the expansion bending place and the screw rod 2 ' of expansion sleeve 3 ' with wall outer surface contacting point, make the expansion bending place stress-bearing capability forfeiture of expansion sleeve 3 ' easily or when reducing, its screw rod 2 ' is also lost with the stressed effect of wall outer surface contacting point thereupon or is reduced, and makes the effect forfeiture of EXPANSION ANCHOR BOLTS.

2, existing EXPANSION ANCHOR BOLTS in use, in EXPANSION ANCHOR BOLTS embeds the eye of accomplishing fluently, when taking off nut 1 ' fixed installation object then, because size, the degree of depth of the eye that burrows are inaccurate, and installer's fault, be easy to make the screw rod 2 ' of EXPANSION ANCHOR BOLTS to fall in the eye, and be difficult to take out.

Deficiency at above-mentioned existing EXPANSION ANCHOR BOLTS exists is necessary to invent the problem that a kind of upset bolt solves its existence.

The model utility content

The purpose of this utility model is to provide a kind of EXPANSION ANCHOR BOLTS, and being connected firmly of itself and wall or ground, the screw rod that force bearing point is difficult for forfeiture effect and EXPANSION ANCHOR BOLTS can not fall in the wall eye.

In order to realize such scheme, technical solution of the present utility model is: a kind of EXPANSION ANCHOR BOLTS, it is made up of nut, screw rod and expansion sleeve, nut is placed in the screw rod top, screw rod tail is a taper, wherein said screw rod top is provided with a taper, and expansion sleeve is located between the taper on screw rod tail taper and described top, and described expansion sleeve two ends are equipped with several openings.

The utility model EXPANSION ANCHOR BOLTS, the taper at wherein said screw rod middle part are one to be screwed onto the tapered cup nut on the screw rod.

The utility model EXPANSION ANCHOR BOLTS, four openings are all offered at wherein said expansion sleeve two ends.

After adopting such scheme, the utility model EXPANSION ANCHOR BOLTS is when hammering in wall after the perforating, the bloated effect of certain support is played in the outer end of expansion sleeve, make the expansion sleeve tube wall be close to the wall inboard, after whole bolt embeds wall fully during fastening installation object, bolt expansion sleeve inner end is produced the stay bolt effect, and outward during the stay bolt expansion sleeve, pulling force acts on the expansion sleeve outer end again, the expansion sleeve outer end is stressed once more on the original basis to be close to more or to embed in the body of wall thereby make, forming three force bearing points at last makes object more firm than original with being connected of wall or ground, even the stressed effect forfeiture or the reduction of expansion sleeve front end expansion bending place force bearing point, other force bearing point also still has stronger effect, the utility model EXPANSION ANCHOR BOLTS is established taper on screw rod top in addition, make the expansion sleeve of being lived stop screw rod from expansion sleeve, to drop out, thereby avoided screw rod to fall into being difficult in the eye trouble of taking out by extruding around the eye on wall or ground.

Description of drawings

Fig. 1 is existing EXPANSION ANCHOR BOLTS structural representation;

Fig. 2 is the structural representation of the utility model EXPANSION ANCHOR BOLTS;

Fig. 3 is another example structure schematic representation of the utility model EXPANSION ANCHOR BOLTS.

Embodiment

The utility model EXPANSION ANCHOR BOLTS structural representation as shown in Figure 2, it is made up of nut 1, screw rod 2 and expansion sleeve 3, nut 1 is placed in screw rod 2 tops, screw rod 2 afterbodys 21 are taper, screw rod 2 tops are provided with a round platform 22, expansion sleeve 3 is located between the round platform 22 at screw rod tail taper 21 and middle part, and 3 of expansion sleeves, tail end are respectively equipped with 4 openings 31,32, makes the upper and lower opening 31,32 of expansion sleeve 3 all can realize expanding.

Another example structure schematic representation of the utility model EXPANSION ANCHOR BOLTS as shown in Figure 3, it is made up of nut 4, screw rod 5 and expansion sleeve 6 and tapered cup nut 7, nut 4 is placed in screw rod 5 tops, screw rod 5 afterbodys 51 are taper, the screw rod 5 middle parts tapered cup nut 7 that is spirally connected, expansion sleeve 6 is located between the tapered cup nut 7 at screw rod tail taper 51 and middle part, and 6 of expansion sleeves, tail end are respectively equipped with 4

openings

61,62, makes the upper and

lower opening

61,62 of expansion sleeve 6 all can realize expanding.

The utility model EXPANSION ANCHOR BOLTS is when hammering in wall after the perforating, the bloated effect of certain support is played in the outer end of expansion sleeve, make the expansion sleeve tube wall be close to the wall inboard, after whole bolt embeds wall fully during fastening installation object, bolt expansion sleeve inner end is produced the stay bolt effect, and outward during the stay bolt expansion sleeve, pulling force acts on the expansion sleeve outer end again, the expansion sleeve outer end is stressed once more on the original basis to be close to more or to embed in the body of wall thereby make, forming three force bearing points at last makes object more firm than original with being connected of wall or ground, even the stressed effect forfeiture or the reduction of expansion sleeve front end expansion bending place force bearing point, other force bearing point also still has stronger effect, the utility model EXPANSION ANCHOR BOLTS is established taper on screw rod top in addition, make the expansion sleeve of being lived stop screw rod from expansion sleeve, to drop out, thereby avoided screw rod to fall into being difficult in the eye trouble of taking out by extruding around the eye on wall or ground.

All any modifications of within spirit of the present utility model, principle and design principle, being done, be equal to replacement, improvement etc., all be included in the utility model scope.

Claims

1. EXPANSION ANCHOR BOLTS, it is made up of nut, screw rod and expansion sleeve, nut is placed in the screw rod top, screw rod tail is a taper, it is characterized in that: described screw rod top is provided with a taper, expansion sleeve is located between the taper on screw rod tail taper and described top, and described expansion sleeve two ends are equipped with several openings.

2. EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: the taper at described screw rod middle part is one to be screwed onto the tapered cup nut on the screw rod.

3. EXPANSION ANCHOR BOLTS according to claim 2 is characterized in that: four openings are all offered at described expansion sleeve two ends.