CN203009502U

CN203009502U - Expansion bolt

Info

Publication number: CN203009502U
Application number: CN 201320012218
Authority: CN
Inventors: 聂曙光
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-10
Filing date: 2013-01-10
Publication date: 2013-06-19
Anticipated expiration: 2023-01-10

Abstract

The utility model relates to an expansion bolt which comprises tubular bolt and a nut; the tubular bolt and the nut are installed in a matched manner; a fork-shaped expansion head is arranged at one end of the tubular bolt; supporting planes in clearance fit are arranged on the fork-shaped expansion head at one end of the tubular bolt; a core column is sleeved in the inner chamber of the tubular bolt; the length of the core column is greater than that of the tubular bolt; the inner end of the core column is a tapered pointed end; and the tapered pointed end can be inserted into the clearance between the supporting planes. The expansion bolt has the advantages that the structure is simple, the use is convenient, the expanding and fastening effect is good, the expansion bolt is not easy to fall off during use, the side of a gasket, which is close to the nut, takes a shape with a convex center, the stress when the nut is fastened is increased to ensure that the nut dose not fall off, and besides, antiskid inverted teeth are arranged on the outer side surface of the fork-shaped expansion head, so as to effectively solve the problem that when in use, the expansion bolt automatically falls off due to insufficient friction in a wall.

Description

EXPANSION ANCHOR BOLTS

Technical field:

The utility model belongs to technical field of fastening, is specifically related to a kind of bolt, particularly relates to a kind of part being fixed in EXPANSION ANCHOR BOLTS in hole.

Background technique:

EXPANSION ANCHOR BOLTS in tradition, expansion-head is generally a Rotary-table, expansion sleeve is the straight sleeve that an end has several straight line seams, turn nut or screw rod cylinder, thereby expansion-head makes the expansion sleeve distending make that EXPANSION ANCHOR BOLTS is swollen gets into the cave really, because be the expansion sleeve expansion of expansion-head outside, and expansion-head itself does not expand, EXPANSION ANCHOR BOLTS at the inner expansion layer of body of wall without support force, the degree of depth that expansion-head and expansion sleeve are inlayed mutually and surface of contact are all very limited, and body of wall internal drilling aperture ratio bolt hole is large, easily come off during use, and traditional EXPANSION ANCHOR BOLTS needs balance pad and two pads of spring pad to be used in conjunction with simultaneously, during boring, complex procedures, be easy to lose pad.

The model utility content:

The purpose of this utility model is for problems of the prior art and deficiency, provides a kind of simple in structure, easy to use, fixation, and intensity is high, the novel EXPANSION ANCHOR BOLTS that bearing tension is large.

Technological scheme: a kind of EXPANSION ANCHOR BOLTS, comprise tubular bolt, nut, both Matching installations, an end of described tubular bolt is provided with forked expansion-head, is provided with the supporting plane of Spielpassung on the forked expansion-head of tubular bolt one end, be set with a stem stem in the tubular bolt inner chamber, the length of stem stem is greater than the length of tubular bolt, and the inner end of stem stem is cone point, and this cone point can insert in the gap of described supporting plane.

Preferably be provided with for anti-skidding pawl at described forked expansion-head outer side surface.

Preferred described nut one side also is provided with packing ring, and packing ring and nut are structure as a whole, and described packing ring is near nut one side umbo, and closely cooperate with nut, the opposite side medial recess, along the middle part to peripheral progressive additive, the adjacent segment of described supporting plane is preferably the cross otch.

Preferred again as technological scheme: described stem stem peripheral surface scribbles glue layer.

The beneficial effects of the utility model: EXPANSION ANCHOR BOLTS of the present utility model is squeezed into tubular bolt in body of wall by stem stem, its end can embed hole deeper, can effectively stop tubular bolt and stem stem to rotate together when mounted, skidding occurs, EXPANSION ANCHOR BOLTS supports by stem stem at the expansion layer of body of wall inside, and the support swelling is solid effective, bearing tension is large, be not easy during use to come off, and simple in structure, easy to use.the utility model nut and packing ring are structure as a whole, can effectively avoid the workmen to omit because operate miss causes packing ring, described packing ring protrudes shape near centered by nut one side, stress in the time of can increasing fastening nuts, and guarantee that nut can not come off, the utility model stem stem peripheral surface scribbles glue layer, can be by glue and tubular bolt inner tight bonding, avoid stem stem loss in transportation process, in addition, forked expansion-head outer side surface described in the utility model is provided with for anti-skidding pawl, can effectively solve EXPANSION ANCHOR BOLTS in use because of the inadequate problem of Automatic-falling of body of wall internal friction.

Description of drawings:

Fig. 1 is the External view of EXPANSION ANCHOR BOLTS;

Fig. 2 is the A-A sectional drawing of Fig. 1;

Fig. 3 is the use phase diagram of EXPANSION ANCHOR BOLTS;

Fig. 4 is that the B of Fig. 2 is to structural representation.

Number in the figure: 1 is stem stem, and 2 is tubular bolt, and 3 is nut, and 4 is pawl, and 5 is forked expansion-head, and 6 is packing ring, and 7 is supporting plane, and 8 is the cross otch.

Embodiment:

Embodiment 1: referring to Fig. 1, Fig. 2, a kind of EXPANSION ANCHOR BOLTS comprises tubular bolt 2, nut 3, both Matching installations, an end of described tubular bolt 2 is provided with forked expansion-head 5, is provided with the supporting plane 7 of Spielpassung on the forked expansion-head 5 of tubular bolt 2 one ends, be set with a stem stem 1 in tubular bolt 2 inner chambers, the length of stem stem 1 is greater than the length of tubular bolt 2, and the inner end of stem stem 1 is cone point, and this cone point can insert in the gap of described supporting plane 7.

The present embodiment is provided with for anti-skidding pawl 4 at described forked expansion-head 5 outer side surfaces, in order to solve EXPANSION ANCHOR BOLTS in use because of the inadequate problem of Automatic-falling of body of wall internal friction, described nut 3 one sides also are provided with packing ring 6, packing ring 6 is structure as a whole with nut 3, the close nut 3 one side umbos of described packing ring 6, and closely cooperate with nut 3, the opposite side medial recess, along the middle part to peripheral progressive additive, can increase the stress of nut 3 when fastening, and guarantee that nut 3 can not come off.

Referring to Fig. 3, the EXPANSION ANCHOR BOLTS of the present embodiment in use, stem stem 1 passes tubular bolt supporting plane gap and enters the hole body, make supporting plane 7 along the otch distending, the expansion layer supports by stem stem 1, fastening nut 3, by coordinating of nut 3 and packing ring 6, make EXPANSION ANCHOR BOLTS fastening in the body of hole.

Embodiment 2: another kind of EXPANSION ANCHOR BOLTS, and content is substantially the same manner as Example 1, and in the present embodiment, stem stem 1 peripheral surface scribbles glue layer as different from Example 1, by glue and tubular bolt 2 inner tight bondings, avoids stem stem 1 loss in transportation process.

Embodiment 3: referring to Fig. 4, and another EXPANSION ANCHOR BOLTS, content is substantially the same manner as Example 2, and in the present embodiment, the adjacent segment of supporting plane 7 is cross otch 8 as different from Example 2.

The adjacent segment of EXPANSION ANCHOR BOLTS supporting plane 7 of the present utility model is not must be the disclosed cross otch of above embodiment; can also be designed to as required other symmetrical a plurality of kerfs; every design concept and global shape are the same with the utility model essence, all fall into the utility model protection domain.

Claims

1. EXPANSION ANCHOR BOLTS, comprise tubular bolt (2), nut (3), both Matching installations, one end of described tubular bolt (2) is provided with forked expansion-head (5), it is characterized in that: the supporting plane (7) that is provided with Spielpassung on the forked expansion-head (5) of tubular bolt (2) one ends, be set with a stem stem (1) in tubular bolt (2) inner chamber, the length of stem stem (1) is greater than the length of tubular bolt (2), the inner end of stem stem (1) is cone point, and this cone point can insert in the gap of described supporting plane (7).

2. EXPANSION ANCHOR BOLTS according to claim 1, is characterized in that: be provided with for anti-skidding pawl (4) at described forked expansion-head (5) outer side surface.

3. EXPANSION ANCHOR BOLTS according to claim 1, it is characterized in that: described nut (3) one sides also are provided with packing ring (6), packing ring (6) is structure as a whole with nut (3), described packing ring (6) is near nut (2) one side umbos, and closely cooperate with nut (2), the opposite side medial recess is along the middle part to peripheral progressive additive.

4. EXPANSION ANCHOR BOLTS according to claim 3, it is characterized in that: the adjacent segment of described supporting plane (7) is cross otch (8).

5. according to claim 1-4 described EXPANSION ANCHOR BOLTS of any one, it is characterized in that: described stem stem (1) peripheral surface scribbles glue layer.