CN102278343A

CN102278343A - Direct-entering expansion bolt

Info

Publication number: CN102278343A
Application number: CN 201110197069
Authority: CN
Inventors: 覃国君; 王基培; 龚川
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-14
Filing date: 2011-07-14
Publication date: 2011-12-14

Abstract

The invention discloses a direct-entering expansion bolt, which comprises an expansion sleeve (1); a bolt is matched in the expansion sleeve; and the front end of the bolt is provided with an inverse cone, a thread matched with a screw cap is tapped at the other end of the bolt, and the big end part of the inverse cone is provided with a drill bit (7). The direct-entering expansion bolt overcomes the defects of the known technology, and can be directly driven in use without preparing a special drill bit so as to save auxiliary time and processes in operation; and the direct-entering expansion bolt is convenient and fast in use, and is a great improvement on fastening devices.

Description

The direct-insert EXPANSION ANCHOR BOLTS

Technical field

The present invention relates generally to a kind of securing means, particularly a kind of swell fixture.

Technical background

Known swell fixture all has an expansion sleeve, the uniform opening that prolongs vertically more than at least two of sleeve pipe front end edge circumferencial direction, cooperate a screw in the sleeve pipe, the screw front end has back taper, the other end is attacked the screw thread that cooperates with nut, load onto suitable bit bore with percussive drill in advance during use, again whole swell fixture is filled in the hole, use hammering in case of necessity, screw nut again, make the back taper of screw burst sleeve pipe, thereby screw is hammered within the walls securely, though described swell fixture advantage is a lot, but deficiency is the screw of a kind of specification of every use, must cooperate suitable bit bore, the hole that drill bit bored is excessive or too small all not all right, makes troubles to construction, especially the very little occasion of consumption, can not prepare to have the drill bit of enough specifications, in a word, using the preceding palpus boring of swell fixture to fill in and tightening up is suitable trouble.

Summary of the invention

The object of the present invention is to provide a kind ofly can overcome the known technology shortcoming, do not need the direct-insert EXPANSION ANCHOR BOLTS of holing in advance before the mounting screw.

For achieving the above object, the solution of the present invention is: a kind of direct-insert EXPANSION ANCHOR BOLTS comprises an expansion sleeve, cooperate a bolt in the expansion sleeve, the front end of bolt has back taper, and the other end is attacked the screw thread that cooperates with nut, and its specialization is: the major part end of back taper is a drill bit.

Other scheme comprises: the pipe shaft of expansion sleeve has some spiral chutes, and is uniformly distributed with some openings along the circumference at the end near the bolt back taper.

Further scheme comprises that the other end of bolt shank is drilled with the hole perpendicular to rod axis, and described Kong Yuyi root pin cooperates.

When adopting such scheme fixed expansion bolt, do not need first boring, again fixing bolt, drill bit on the available bolt is together with bolt shank, utilize hand-held drill that bolt is hammered within the walls and tightens up, save the trouble of some operations and selection or preparation drill bit, thereby realized purpose of the present invention.

Below in conjunction with diagram and embodiment scheme is described in more detail.

Description of drawings

Fig. 1 is a direct-insert EXPANSION ANCHOR BOLTS plan view;

Fig. 2 is Fig. 1 side view;

Fig. 3 is a direct-insert EXPANSION ANCHOR BOLTS sleeve plan view;

Fig. 4 is a direct-insert bolt shank plan view;

Fig. 5 is the left view among Fig. 4;

Fig. 6 is Fig. 4 plan view.

Embodiment

Direct-insert EXPANSION ANCHOR BOLTS as shown in Figures 1 and 2, comprise expansion sleeve 1, in be with a bolt shank that cooperates with sleeve pipe 2, is furnished with nut 3, pad and spring washer 4 are arranged, the pipe shaft of sleeve pipe has the spiral chute 5 of some symmetrical distributions, as shown in Figure 3, and have opening 6 at mouth of pipe place, the mouth of pipe of band opening contacts with the back taper of bolt shank 2, the front end of back taper is a drill bit 7, the other end of bolt shank 2 is drilled with the hole, cooperates with pin 8, and pin is slightly long, outside all extended hole, two ends, pin-and-hole is that tapering or straight degree all can.

Disposable drill bit as bolt shank 2 front ends of Fig. 4 and Fig. 6, comprise a cutter hub 9, cutter hub 9 has certain width L, L slightly changes with the diameter difference of bolt, for example the bolt width of M6 is 3mm, the bolt width of M10 is 4mm, the front end of cutter hub 9 forms two straight line major cutting edges 10, forms angle, and the angle of its angle has certain limit, present embodiment is 118 °, certainly also within the application's consideration, there is stiffening rib 11 both sides of cutter hub 9 to other angle of employing, and stiffening rib is connected between the end face and cutter hub 9 of back taper, the big end of back taper cuts one diametrically symmetrically, form and be slightly less than the width H of cutter hub 9 apart from T between 12, two planes 12, two planes, and all the other local diameters of back taper equate with the width H of cutter hub 9, for example to the bolt of M10, width H is 15mm, and T is 12mm, the bolt of M6, width H is 11mm, and T is 8mm.

Major cutting edge 10 palpiforms become cutting angle α, as shown in Figure 4.

To burst the direction of swivel nut of sleeve pipe different for pierce direction and the bolt of bolt, and present embodiment pierces direction and is the inhour rotation, and the screw-in direction of nut is a clockwise direction.

Above-mentioned EXPANSION ANCHOR BOLTS uses extremely convenient, during use, sleeve pipe 1 is inserted in bolt shank 2 from an end, the bolt that exposes partly is inserted in nut 3, again pin 8 is filled in, clamp the head of bolt shank 2 with the chuck of percussion drill, and contain the part that pin 8 exposes, inhour is started rig, then the drill bit of bolt shank front end rotates and pierces in the body of wall, along with expansion sleeve 1 also enters, the formed slag of holing is discharged from 12 formed gaps, back taper plane and spiral slotted eye, dextrorotation jack panel 3 again after putting in place, the back taper of bolt shank 2 partly bursts the purpose that sleeve pipe 1 reaches fastening screw trip bolt, withdraw from nut again, installation needs the suspension member of installation, tightens up with nut to get final product again.

This direct-insert EXPANSION ANCHOR BOLTS has overcome the shortcoming of known technology, need not to prepare target drill during use, directly hammers into to tighten up to get final product, and is easy to use the auxiliary time when having saved operation, quick, is a very big improvement on the securing means.

Claims

1. a direct-insert EXPANSION ANCHOR BOLTS comprises an expansion sleeve (1), cooperates a bolt in the expansion sleeve, and the front end of bolt has back taper, and the other end is attacked the screw thread that cooperates with nut, it is characterized in that: the major part end of back taper is drill bit (7).

2. a kind of direct-insert EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: the pipe shaft of expansion sleeve has some spiral chutes (5), and is uniformly distributed with some openings (6) along the circumference at the end near the screw back taper.

3. a kind of direct-insert EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: the other end of bolt shank (2) is drilled with the hole perpendicular to rod axis, and described Kong Yuyi root pin (8) cooperates.

4. a kind of direct-insert EXPANSION ANCHOR BOLTS according to claim 1, it is characterized in that: described drill bit comprises a cutter hub (9), the front end of cutter hub (9) forms two straight line major cutting edges (10), form angle, there is stiffening rib (11) both sides of cutter hub (9), and stiffening rib is connected between the end face and cutter hub (9) of back taper (6).

5. a kind of direct-insert EXPANSION ANCHOR BOLTS according to claim 4 is characterized in that: the angle that major cutting edge (10) forms is 118 °.

6. a kind of direct-insert EXPANSION ANCHOR BOLTS according to claim 4, it is characterized in that: the big end of back taper (6) cuts one diametrically symmetrically, form two planes (12), distance between two planes (12) is slightly less than the width H of cutter hub (9), and all the other local diameters of back taper (6) equate with the width H of cutter hub (9).