CN101463854B

CN101463854B - Expansion bolt

Info

Publication number: CN101463854B
Application number: CN 200910095611
Authority: CN
Inventors: 金拯
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-10
Filing date: 2009-01-10
Publication date: 2013-05-15
Anticipated expiration: 2029-01-10
Also published as: CN101463854A

Abstract

The invention discloses an expansion bolt belonging to the technical field of fastening pieces. The expansion bolt comprises an expansion bolt with a nut arranged outside and an expansion bolt with a built-in nut which respectively comprises a threaded rod cylindrical body, an expansion head, an expansion sleeve, a spacing piece, a cushion ring, and the like, wherein, a mutually inlaid buckling structures is formed by arranging a groove on the expansion head and a retraction head on the expansion sleeve, thereby preventing the threaded rod cylindrical body of the expansion bolt with the nut arranged outside from being retracted into a drilled hole or a nut (the expansion head) of the expansion bolt with the built-in nut from being fallen into the drilled hole, and preventing that the function of tight fixation can not be played due to the synchronous rotation of the bolt and the nut. The expansion bolt has the advantages of reasonable structural design, simple installation, convenient use, reliable installation and no hidden trouble after abandonment.

Description

EXPANSION ANCHOR BOLTS

Technical field

The present invention is a kind of hardware, belongs to technical field of fastening, the specifically built-in EXPANSION ANCHOR BOLTS of a kind of EXPANSION ANCHOR BOLTS of nut external or nut.

Background technique

EXPANSION ANCHOR BOLTS generally is comprised of component such as screw rod cylinder, expansion-head, expansion sleeve, nut, packing ring and pads.Existing expansion-head is generally a Rotary-table, and expansion sleeve is the straight sleeve that an end has several vertical bar 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.Position residing according to nut can be divided into nut external and the built-in EXPANSION ANCHOR BOLTS of nut.Nut external EXPANSION ANCHOR BOLTS refers to that nut is exposed to the form of outside, turns nut and makes EXPANSION ANCHOR BOLTS fastening; The built-in EXPANSION ANCHOR BOLTS of nut refers to the buried form that enters in the getting into the cave of the connecting bodys such as body of wall or concrete of nut (being expansion-head), and the chieftain who turns the screw column end of body makes EXPANSION ANCHOR BOLTS fastening.Present EXPANSION ANCHOR BOLTS get into the cave in installation process can not bore deeply can not bore shallow, in case bore dark, for nut external EXPANSION ANCHOR BOLTS, the indentation of screw rod cylinder is got into the cave, for the built-in EXPANSION ANCHOR BOLTS of nut, nut (being expansion-head) is fallen in getting into the cave, particularly when being screwed into Shi Huigeng again, the screw rod cylinder easily occurs, thereby put to no little inconvenience, and bolt when turning (screw rod cylinder) and nut easily rotate the phenomenon that generation can not be fastening together, affect the use of EXPANSION ANCHOR BOLTS.Although have on the expansion-head of the built-in EXPANSION ANCHOR BOLTS of nut in existing technology and establish groove, but there is no the movement of reducing end in this groove, groove is not yet detained or is hooked, and the degree of depth that expansion-head and expansion sleeve are inlayed mutually and surface of contact are all very limited, easily skid, so effect is bad.In addition, some use discarded later EXPANSION ANCHOR BOLTS often to protrude on metope or ground, are difficult to remove, and affects environmental beauty, if on the road surface safe hidden danger especially.

Summary of the invention

The object of the present invention is to provide a kind of easy to use, the EXPANSION ANCHOR BOLTS of not staying hidden danger after reliable and discarded is installed.

To achieve these goals, the present invention adopts following scheme:

A kind of EXPANSION ANCHOR BOLTS, be divided into the built-in EXPANSION ANCHOR BOLTS of nut external expanding screw screw bolt and nut, all comprise screw rod cylinder, expansion-head, expansion sleeve, pad and packing ring etc., the expansion-head of nut external EXPANSION ANCHOR BOLTS is fixed on the front end of screw rod cylinder, and be connected as a single entity with the screw rod cylinder, expansion sleeve, pad, packing ring are sleeved on the outer wall of screw rod cylinder after by forward direction successively, and the rear end of screw rod cylinder is equipped with tightening nut, the expansion-head of the built-in EXPANSION ANCHOR BOLTS of nut is threaded with the screw rod cylinder, and described expansion-head is provided with groove; One end of expansion sleeve is provided with inside reducing, and the end of groove can be moved or can be detained or hook to this reducing in groove.

Described groove forms by the side or by the end and side.

Dihedral groove or in-line groove that described groove is comprised of the end and side.

Described expansion-head be one with the association of reeded Rotary-table or round platform and cylinder, this cylinder can be connected on any end or two ends of round platform.

Reducing on described expansion sleeve is the part of expansion sleeve barrel, the inside bending in its end or press-bending or bending.

Can be provided with coarse surface on the outer surface of described expansion sleeve.

After the present invention has adopted such scheme, the groove on expansion-head can be buckled or hook to reducing on expansion sleeve, play the effect that stops expansion sleeve to separate with expansion-head, thereby indentation is got into the cave or expansion-head (the built-in EXPANSION ANCHOR BOLTS of nut) is fallen in getting into the cave to prevent screw rod cylinder (nut external EXPANSION ANCHOR BOLTS), and reducing can be moved in groove, its end can be embedded in groove deeper, can effectively stop screw rod cylinder and nut to rotate together when mounted.Because can not make in the indentation of screw rod cylinder gets into the cave, thus can be deeply drilled getting into the cave, if can't remove after discarded like this, only need to get final product in not getting into the cave protruding to beat at metope or ground bolt head.Bolt head is beaten sinks to the dismounting that helps on the contrary EXPANSION ANCHOR BOLTS in getting into the cave.

The invention will be further described below in conjunction with the drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of nut external EXPANSION ANCHOR BOLTS;

Fig. 2 is the structural representation of the built-in EXPANSION ANCHOR BOLTS of nut;

Fig. 3 is the view of a kind of round table-like expansion-head with the dihedral groove of nut external EXPANSION ANCHOR BOLTS;

Fig. 4 is the view of a kind of round table-like expansion-head with the in-line groove of nut external EXPANSION ANCHOR BOLTS;

Fig. 5 is the view that a kind of round platform with the dihedral groove of nut external EXPANSION ANCHOR BOLTS connects cylindric expansion-head;

Fig. 6 is the view that a kind of round platform with the in-line groove of nut external EXPANSION ANCHOR BOLTS connects cylindric expansion-head;

Fig. 7 is the view of a kind of round table-like expansion-head with the dihedral groove of the built-in EXPANSION ANCHOR BOLTS of nut;

Fig. 8 is the view of a kind of round table-like expansion-head with the in-line groove of the built-in EXPANSION ANCHOR BOLTS of nut;

Fig. 9 is the view that a kind of round platform with the in-line groove of the built-in EXPANSION ANCHOR BOLTS of nut connects cylindric expansion-head;

Figure 10 is the view that a kind of round platform with the dihedral groove of the built-in EXPANSION ANCHOR BOLTS of nut connects cylindric expansion-head;

Figure 11 is a kind of view of expansion sleeve;

Figure 12 is the view of the round table-like expansion-head that is comprised of the side of a kind of groove of nut external EXPANSION ANCHOR BOLTS.

Embodiment

As depicted in figs. 1 and 2, EXPANSION ANCHOR BOLTS of the present invention is divided into the built-in EXPANSION ANCHOR BOLTS of nut external expanding screw screw bolt and nut, all comprises screw rod cylinder 1, expansion-head 5, expansion sleeve 4, pad 2 and packing ring 3 etc.Fig. 1 is the structural type of nut external EXPANSION ANCHOR BOLTS, its expansion-head 5 is fixed on the front end of screw rod cylinder 1, and be connected as a single entity with screw rod cylinder 1, expansion sleeve 4, pad 2 and packing ring 3 etc. are by being sleeved on successively after forward direction on the outer wall of screw rod cylinder 1, and the rear end of screw rod cylinder 1 is equipped with tightening nut 9.Fig. 2 is the structural type of the built-in EXPANSION ANCHOR BOLTS of nut, its expansion-head 5 is threaded with screw rod cylinder 1, expansion sleeve 4, pad 2 and packing ring 3 are sleeved on the outer wall of screw rod cylinder 1 after being equal to the reason forward direction successively, expansion-head 5 plays the swelling nut, screw rod cylinder 1 be one with outer-hexagonal or other chieftains' 10 bolt.Expansion-head 5 is associations of a Rotary-table or round platform and cylinder 11, which is provided with several (as 2) dihedral groove 7 or in-line grooves 7.Groove 7 was comprised of the end 8 and side, as Fig. 3---Figure 10, wherein Fig. 3---Fig. 6 is 4 kinds of form figure of the expansion-head of nut external EXPANSION ANCHOR BOLTS, and Fig. 7---Figure 10 is 4 kinds of form figure of the expansion-head of the built-in EXPANSION ANCHOR BOLTS of nut, and cylinder 11 can be connected on any end or two ends of round platform.Expansion sleeve 4 is thin-wall circular column sleeve bodies, several vertical bars seams 12 that the one end is offered except the needs of promising expansion, also is provided with several (as 2) reducings 6 at this end, as shown in figure 11.Reducing 6 is parts of expansion sleeve barrel, and root is connected with the expansion sleeve barrel, the inside bending in its end or press-bending or bending.During assembling, the end extruding that reducing 6 arranged of this end of Rotary-table microcephaly of expansion-head 5 to expansion sleeve 4, be subject to the obstruction of expansion-head 5, reducing 6 is slightly by distending, until reducing 6 is pushed away the groove 7 that falls into expansion-head 5.The end 8 of groove 7, can be detained or hook to reducing 6, formed the form that is similar to the folder hook, plays the effect that prevention both separates.Simultaneously, reducing 6 inwardly by bending or press-bending or crooked end deeper in groove 7, can effectively stop screw rod cylinder and nut to rotate together when mounted.

As a kind of special case, groove 7 on expansion-head 5 is only the vertical bar shape groove that is surrounded by the side and there is no the end 8, reducing 6 on expansion sleeve 4 can be moved in groove 7, due to its inwardly by bending or press-bending or crooked end deeper in groove 7, can effectively stop equally screw rod cylinder and nut to rotate together when mounted.The figure of a kind of expansion-head 5 of this special case of nut external EXPANSION ANCHOR BOLTS that shown in Figure 12 is, the built-in EXPANSION ANCHOR BOLTS of nut has internal thread in the centre of Figure 12 accordingly.

During installation, along with expansion-head 5 is squeezed into expansion sleeve 4, reducing 6 is moved in groove 7, stops simultaneously screw rod cylinder and nut to rotate together.The expandable sleeve wall 14 of all the other on expansion sleeve 4 be subject to expansion-head 5 effect and along the round platform conical surface by distending, until EXPANSION ANCHOR BOLTS and get into the cave fastening.

Can also be provided with the frictional force of coarse surface 13 to increase expansion sleeve 4 and to get into the cave with methods such as annular knurl or indentations on the outer surface of expansion sleeve 4, as Figure 11.

Nut external EXPANSION ANCHOR BOLTS in the present invention is because screw rod cylinder 1 wherein is difficult in indentation gets into the cave, so when mounted might as well be deeply drilled getting into the cave.Its advantage is need to be shifted or go out of use and can't remove the time with the EXPANSION ANCHOR BOLTS of crossing when the object that is fixed, only need protrude bolt head outside getting into the cave hit down get into the cave in just can, stopping only need exert all one's strength a little and just can overcome for reducing 6.Bolt head beaten sink to get into the cave inner after, the wall that can be easily vises expansion sleeve 4 with pliers helps the dismounting of EXPANSION ANCHOR BOLTS on the contrary with taking-up, gets final product protection of the environment, can eliminate safe hidden danger again.

Above-described embodiment only is used for explaining inventive concept of the present invention, but not to the restriction of rights protection of the present invention, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should fall into protection scope of the present invention.

Claims

1. EXPANSION ANCHOR BOLTS, be divided into the built-in EXPANSION ANCHOR BOLTS of nut external expanding screw screw bolt and nut, all comprise screw rod cylinder (1), expansion-head (5), expansion sleeve (4), pad (2), packing ring (3), the expansion-head (5) of nut external EXPANSION ANCHOR BOLTS is fixed on the front end of screw rod cylinder (1), and be connected as a single entity with screw rod cylinder (1), expansion sleeve (4), pad (2), packing ring (3) is by being sleeved on successively after forward direction on the outer wall of screw rod cylinder (1), and the rear end of screw rod cylinder (1) is equipped with tightening nut (9), the expansion-head of the built-in EXPANSION ANCHOR BOLTS of nut (5) is threaded with screw rod cylinder (1), it is characterized in that: described expansion-head (5) is provided with groove (7) axial and that the end (8) are arranged, one end of expansion sleeve (4) is provided with inside reducing (6), this reducing (6) is the part of expansion sleeve barrel, the end that the end of this reducing (6) curves inwardly and do not stretch out expansion sleeve, reducing (6) can be moved or can detain or hook at the end (8) of groove (7) in groove (7), dihedral groove or in-line groove that groove (7) is comprised of the end (8) and side.

2. EXPANSION ANCHOR BOLTS according to claim 1, it is characterized in that: described expansion-head (5) be one with the association of Rotary-table or round platform and the cylinder (11) of fluted (7), this cylinder (11) can be connected on any end or two ends of round platform.

3. EXPANSION ANCHOR BOLTS according to claim 1, is characterized in that: can be provided with coarse surface (13) on the outer surface of described expansion sleeve (4).