CN205064494U

CN205064494U - Expansion bolt

Info

Publication number: CN205064494U
Application number: CN201520684502.0U
Authority: CN
Inventors: 于光成
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-09-06
Filing date: 2015-09-06
Publication date: 2016-03-02
Anticipated expiration: 2025-09-06

Abstract

The utility model provides an expansion bolt, including countersunk head screw rod, expand tube, countersunk head screw rod rear portion is equipped with the screw, and it has a plurality of inflation openings to open on the rear portion lateral wall of expand tube, and anterior the opening of expand tube has a plurality of embedding notches, and countersunk head screw rod rear portion is followed the expand tube front portion and is stretched into in the expand tube, countersunk head screw rod rear portion still is equipped with the tensioner ring, and the tensioner ring is the frustum form, and it has the screw hole that runs through its front and back terminal surface, tensioner ring and countersunk head screw rod screw -thread fit to open in the tensioner ring. It rotates to control the countersunk head screw rod, nevertheless because the friction takes place with the expand tube lateral wall for the tensioner ring at countersunk head screw rod rear portion, tensioner ring and countersunk head screw rod screw -thread fit, the relative countersunk head screw rod of tensioner ring has axial displacement, be that the tensioner ring removes to the countersunk head screw rod is anterior, the tensioner ring rear portion is stretched into in the expand tube gradually, expand tube rear portion lateral wall struts, reach the expanded mesh, after the assembly of this expansion bolt is accomplished, in the effect embedding hem of expand tube front portion because of the tapered round platform of countersunk head screw rod, the tapered round platform of countersunk head screw rod can submerge in the expand tube completely.

Description

EXPANSION ANCHOR BOLTS

Technical field

The utility model relates to a kind of EXPANSION ANCHOR BOLTS.

Background technique

Common EXPANSION ANCHOR BOLTS is made up of countersunk head screw rod, expand tube, pad and nut, during use, first must get out the hole of corresponding size on fixed body, then in countersunk head screw rod, expand tube load hole, tightening nut can make countersunk screw, expand tube, between assembling set with fixed body swelling become to be integrated; Common EXPANSION ANCHOR BOLTS is after assembling completes, and wall outer side can be stretched out in the end of nut countersunk head screw rod, but some working environment corresponding, and when EXPANSION ANCHOR BOLTS can not be stretched out outside body of wall, common EXPANSION ANCHOR BOLTS is then inapplicable.

Model utility content

Technical problem to be solved in the utility model is to provide a kind of structure EXPANSION ANCHOR BOLTS simple, easy to use.

For solving the problems of the technologies described above, the utility model provides a kind of EXPANSION ANCHOR BOLTS, comprise countersunk head screw rod, expand tube, countersunk head screw rod rear portion is provided with screw thread, the rear sidewall of expand tube has some inflation openings, expand tube front portion has some embedding notches, and countersunk head screw rod rear portion is stretched in expand tube from expand tube front portion;

Countersunk head screw rod rear portion is also provided with tensioner ring, and tensioner ring is cone table shape, has the tapped hole running through its front/rear end in tensioner ring, and tensioner ring coordinates with countersunk head screw flight.

After adopting such structure, handle countersunk head bolt rotary, but because the tensioner ring at countersunk head screw rod rear portion and expand tube sidewall rub, tensioner ring coordinates with countersunk head screw flight, the relative countersunk head screw rod of tensioner ring has axial displacement, namely tensioner ring is mobile to countersunk head screw rod front portion, tensioner ring rear portion is stretched in expand tube gradually, expand tube rear sidewall is strutted, reach the object of expansion, after this EXPANSION ANCHOR BOLTS has been assembled, the anterior effect because of the tapered round platform of countersunk head screw rod of expand tube embeds in flanging, and the tapered round platform of countersunk head screw rod can submerge in expand tube completely.

The tensioner ring outer wall of this EXPANSION ANCHOR BOLTS there are some fins; After adopting such structure, improve the frictional force between tensioner ring and expand tube sidewall.

The expand tube rear sidewall of this EXPANSION ANCHOR BOLTS outwards has the flange of bending along described inflation openings; Expand tube tube wall also has the expansion gap running through expand tube front/rear end; After adopting such structure, expand tube and outside frictional force can be increased, during use, stop expand tube to follow countersunk head bolt rotary.

The anterior sidewall of expand tube of this EXPANSION ANCHOR BOLTS there are some outward extending flangings; After this EXPANSION ANCHOR BOLTS uses, countersunk head screw rod stretches in the flanging of expand tube, and after completing, countersunk head screw rod can not stretch out wall outer side.

Accompanying drawing explanation

Fig. 1 is the stereogram of this EXPANSION ANCHOR BOLTS embodiment.

Fig. 2 is the stereogram of this EXPANSION ANCHOR BOLTS embodiment countersunk head screw rod.

Fig. 3 is the stereogram of this EXPANSION ANCHOR BOLTS embodiment expand tube.

Fig. 4 is the stereogram of this EXPANSION ANCHOR BOLTS embodiment tensioner ring.

Embodiment

As shown in Figures 1 to 4

This EXPANSION ANCHOR BOLTS comprises countersunk head screw rod 1, expand tube 2, tensioner ring 3.

There is the conical round table 11 of 90 ° countersunk head screw rod 1 front end, and conical round table 11 front-end face has cross recess 12, and countersunk head screw rod 1 sidewall rear portion is provided with outside thread.

Expand tube 2 is roughly one section of cylinder-shaped sleeve, the anterior sidewall of expand tube 2 has four outward extending flangings, 22, four flangings 22 along the anterior circle distribution of expand tube 2, and the length of flanging 22 is greater than conical round table 11 height of countersunk head screw rod 1; The rear sidewall of expand tube 2 has four inflation openings 23, inflation openings 23 extends to the ear end face of expand tube 2, and expand tube 2 rear sidewall outwards has the flange 24 of bending along described inflation openings 23, flange 24 is provided with gap, flange 24 trend of expand tube 2 rear sidewall moves towards contrary with externally threaded the screwing of countersunk head screw rod 1, expand tube 2 tube wall has the expansion gap running through expand tube 2 front and rear end, expansion gap overlaps with in four inflation openings 23.

Countersunk head screw rod 1 rear portion is stretched in expand tube 2 from expand tube 2 front portion, countersunk head screw rod 1 rear portion is also provided with tensioner ring 3, tensioner ring 3 is cone table shape, tensioner ring 3 front-end face area is less than ear end face area, the tapped hole 31 running through its front/rear end is had in tensioner ring 3, tensioner ring 3 and countersunk head screw rod 1 screw-thread fit, tensioner ring 3 outer wall has many fins 32.

During use, this EXPANSION ANCHOR BOLTS is placed in mounting hole pre-drilled in body of wall, screw-driver is utilized to coordinate with the cross recess 12 of countersunk head screw rod 1, handle countersunk head screw rod 1 to rotate, but because the tensioner ring 3 at countersunk head screw rod 1 rear portion rubs with expand tube 2 sidewall, relatively rotate between tensioner ring 3 and countersunk head screw rod 1, in rotation process, tensioner ring 3 and countersunk head screw rod 1 screw-thread fit, and then the relative countersunk head screw rod 1 of tensioner ring 3 has axial displacement, namely tensioner ring 3 is mobile to countersunk head screw rod 1 front portion, in the process, tensioner ring 3 rear portion is stretched in expand tube 2 gradually, expand tube 2 rear sidewall is strutted, reach the object of expansion,

After this EXPANSION ANCHOR BOLTS has been assembled, expand tube 2 front portion is because of in the effect embedding flanging 22 of the tapered round platform of countersunk head screw rod 1, and the tapered round platform of countersunk head screw rod 1 can submerge in expand tube 2 completely.

Above-described is only a kind of mode of execution of the present utility model; it should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model principle; can also make some modification and improvement, these also should be considered as belonging to protection domain of the present utility model.

Claims

1. an EXPANSION ANCHOR BOLTS, comprises countersunk head screw rod, expand tube, and countersunk head screw rod rear portion is provided with screw thread, the rear sidewall of expand tube has some inflation openings, it is characterized in that: expand tube front portion has some embedding notches, and countersunk head screw rod rear portion is stretched in expand tube from expand tube front portion;

2. EXPANSION ANCHOR BOLTS according to claim 1, is characterized in that: tensioner ring outer wall has some fins.

3. EXPANSION ANCHOR BOLTS according to claim 1, is characterized in that: expand tube rear sidewall outwards has the flange of bending along described inflation openings; Expand tube tube wall also has the expansion gap running through expand tube front/rear end.

4. EXPANSION ANCHOR BOLTS according to claim 1, is characterized in that: the anterior sidewall of described expand tube has some outward extending flangings.