CN202579516U

CN202579516U - Expansion bolt

Info

Publication number: CN202579516U
Application number: CN 201220095676
Authority: CN
Inventors: 冯玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-13
Filing date: 2012-03-13
Publication date: 2012-12-05
Anticipated expiration: 2022-03-13

Abstract

The utility model belongs to the technical field of fasteners, relates to hardware, particularly to an expansion bolt, which includes a screw and an expansion pipe, wherein a plurality of open slots are formed at the upper end of the expansion pipe; external threads are arranged on the screw; the expansion pipe is sleeved on the screw; a blind nut is fixedly arranged at one end of the screw; the expansion pipe is arranged above the blind nut; a nut is screwed on the screw rod and above the expansion pipe; and the nut includes a cylinder and a cone. The utility model has the benefits that the nut is rotated through the spanner, the screw moves upward, the nut is inserted into the expansion pipe to realize expansion fixing without exposing unnecessary part of the screw out of the fixed body, the appearance is attractive, the firmness is high, the stress effect is excellent, and the length of the part of screw exposed out of the fixed body can be adjusted in sections.

Description

EXPANSION ANCHOR BOLTS

Technical field:

The utility model relates to a kind of hardware, belongs to technical field of fastening, refers in particular to a kind of EXPANSION ANCHOR BOLTS.

Background technique:

EXPANSION ANCHOR BOLTS be make that airduct props up, hangs, carriage is fixing on the wall, used a kind of special thread link on the floor, on the post.Existing EXPANSION ANCHOR BOLTS is made up of countersunk head screw rod, expand tube, plain washer, spring pad and hexagon nut, and screw rod has a major part, cover expand tube bigger slightly in screw rod outside than screw diameter, and expand tube partly has several roads opening.EXPANSION ANCHOR BOLTS is fixedly to be to utilize the wedge shape gradient to impel expansion to produce the friction bond stress, reaches fixed effect.When using existing EXPANSION ANCHOR BOLTS, must be earlier with the hole of electric impact drill (hammer) corresponding size on fixed body, again in screw rod, the expand tube load hole, the nut of screwing can make that swelling becomes one between screw rod, expand tube, assembling set and the fixed body.After screw rod was tightened, the afterbody of major part just was brought to the expand tube the inside of opening, dashes expand tube big; Reach the purpose of expansion; And then be fixed on screw rod on the fixed body, reaching the purpose of taking root, it can be used for fastening on materials such as cement, brick such as protective grating, rain cover, air-conditioning.But this EXPANSION ANCHOR BOLTS exists certain not enough:

1, because screw rod outwards moves, after EXPANSION ANCHOR BOLTS was fixing, it is longer outward that screw rod exposes fixed body, becomes an obstacle, also influences outward appearance;

2, screw rod is fixing very unreliable, if load has than big bang, possibly get loose, and does not therefore recommend to be used to install ceiling fan etc., thereby can't satisfy the demand in market.

In sum, existing EXPANSION ANCHOR BOLTS exists some to need improved place, and the applicant also is in this purpose just and creates design the utility model.

The model utility content:

The utility model technical problem to be solved is exactly the deficiency that overcomes above-mentioned existence, provide a kind of fixing reliable, no screw rod exposes, EXPANSION ANCHOR BOLTS attractive in appearance.

For solving the problems of the technologies described above, the utility model has adopted following technological scheme: comprise screw rod, expansion tube, the upper end of expansion tube has several opening slots; Screw rod is provided with outside thread; Expansion tube is placed on the screw rod, and said screw rod one end is installed with nut, and expansion tube is positioned at the top of nut; Screw-thread fit has a nut on the screw rod, and nut is positioned at the top of expansion tube.

Said nut comprises: tapered end and cylindrical end; The external diameter of the little head end of said tapered end is less than or equal to the internal diameter of expansion tube, and the external diameter of cylindrical end is equal to or greater than the external diameter of expansion tube.

Be with locating sleeve, packing ring on the said screw rod, wherein locating sleeve is positioned at the top of nut, and packing ring is positioned at the top of positioning pipe, and expansion tube is positioned at the top of packing ring, and nut is positioned at the top of expansion tube.

The beneficial effect of the utility model is: use the spanner rotary nut, screw rod moves up, and nut inserts in the expansion tube, and it is fixing to realize expanding, and does not have unnecessary screw rod and exposes outside the fixed body, attractive in appearance, and fastness is high, stress effect is good, and screw rod exposes the length-adjustable of fixed body.

Description of drawings:

Fig. 1 is the utility model embodiment one a plan view;

Fig. 2 is the utility model embodiment two a plan view.

Symbol description:

1 screw rod, 4 nuts

11 outside threads, 42 cylindrical ends

2 expansion tubes, 42 tapered ends

21 opening slots, 5 locating sleeves

3 nuts, 6 packing rings

Embodiment:

Embodiment one

See shown in Figure 1ly, the utility model comprises: screw rod 1, expansion tube 2.

Particularly:

The upper end of above-mentioned expansion tube 2 evenly has several opening slots 21, and screw rod 1 is provided with outside thread 11, and expansion tube 2 is placed on the screw rod 1; Said screw rod 1 one ends are installed with nut 3; Expansion tube 2 is positioned at the top of nut 3, is rotary with a nut 4 on the screw rod 1, and nut 4 is positioned at the top of expansion tube 2; Said nut 4 comprises: tapered end 41 and cylindrical end 42 can produce certain frictional force between this cylindrical end 42 and the fixed body.The external diameter of these tapered end 41 little head ends is less than or equal to the internal diameter of expansion tube 2, and the external diameter of cylindrical body 41 is equal to or greater than the external diameter of expansion tube 2.

During use; Earlier with the hole of electric impact drill (hammer) corresponding size on fixed body, then with in screw rod 1, expansion tube 2, the nut 3 load hole together, the nut 4 of screwing then can make that swelling becomes one between screw rod 1, expansion tube 2, assembling set and the fixed body; After screw rod 1 is tightened; The microcephaly of nut 3 holds expansion tube 2 the insides that can get into opening, dashes expansion tube 2 greatly, and have certain frictional force between expansion tube 2 and the fixed body this moment; Meanwhile, has certain frictional force between cylindrical body 41 and the fixed body.

Embodiment two

See shown in Figure 2; Present embodiment and the foregoing description difference are: be with locating sleeve 5, packing ring 6 on the above-mentioned screw rod 1; Wherein locating sleeve 5 is positioned at the top of nut 4, and packing ring 6 is positioned at the top of positioning pipe, and expansion tube 2 is positioned at the top of packing ring 6; Nut 4 is positioned at the top of expansion tube 2, can realize that through locating sleeve 5 screw rod 1 exposes the length-adjustable purpose of fixed body.

Certainly; The above only is the embodiment of the utility model; Be not to limit the utility model practical range, all equivalences of doing according to the described structure of the utility model claim, characteristic and principle change or modify, and all should be included in the utility model claim.

Claims

1. an EXPANSION ANCHOR BOLTS comprises screw rod (1), expansion tube (2), and the upper end of expansion tube (2) has several opening slots (21); Screw rod (1) is provided with outside thread (11); Expansion tube (2) is placed on the screw rod (1), it is characterized in that: said screw rod (1) one end is installed with nut (3), and expansion tube (2) is positioned at the top of nut (3); Screw rod (1) is gone up screw-thread fit has a nut (4), and nut (4) is positioned at the top of expansion tube (2).

2. EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: said nut (4) comprising: tapered end (41) and cylindrical end (42); The external diameter of the little head end of said tapered end (41) is less than or equal to the internal diameter of expansion tube (2), and the external diameter of cylindrical end (42) is equal to or greater than the external diameter of expansion tube (2).

3. EXPANSION ANCHOR BOLTS according to claim 2; It is characterized in that: be with locating sleeve (5), packing ring (6) on the said screw rod (1); Wherein locating sleeve (5) is positioned at the top of nut (4); Packing ring (6) is positioned at the top of locating sleeve (5), and expansion tube (2) is positioned at the top of packing ring (6), and nut (4) is positioned at the top of expansion tube (2).