CN202768573U

CN202768573U - Self-drilling expansion screw

Info

Publication number: CN202768573U
Application number: CN 201220380088
Authority: CN
Inventors: 曹广振
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-01
Filing date: 2012-08-01
Publication date: 2013-03-06
Anticipated expiration: 2022-08-01

Abstract

The utility model discloses a self-drilling expansion screw which comprises an expansion casing pipe and a middle rod connected in the expansion casing pipe. The expansion casing pipe comprises a pipe body, a pipe ring arranged at the rear end of the pipe body and a drill bit connected at the front end of the pipe body. The pipe body comprises a rear pipe body and a front inner cone pipe body, a cross-shaped opening is arranged in the inner end of the front inner cone pipe body, and a cone-shaped cavity is arranged in the rear portion of the front inner cone pipe body. A cone head corresponding to the cone-shaped cavity is arranged at the front end of the middle rod, two through grooves are symmetrically arranged in the pipe ring, and a rotating casing head is connected to the rear end of the pipe ring in a clamping mode. The self-drilling expansion screw is novel in structure, convenient to operate, and the drill bit is creatively added at the front end of the expansion screw, the expansion screw can be used for drilling hole and be installed in position in one operation, additional hole drilling is not needed, then the middle rod inside the expansion screw can be hammered in position, and the expansion screw is fixed on a wall. The self-drilling expansion screw is fast to install, reduces almost half of the work quantity of operating workers, and almost doubles work efficiency.

Description

From brill type setscrew

Technical field

The utility model relates to five metals and connects workpiece, relates in particular to a kind of disposable certainly brill type setscrew that is in place.

Background technique

The patent No. is that 201120243252.9 Chinese patent discloses a kind of setscrew, it comprises king-rod, expansion tube and nut, king-rod one end is for expanding head, the other end is connected with nut thread, expansion sleeve is on king-rod and spacing by expanding head and nut clamping, expansion tube one end prolongs its length direction and is split into a plurality of expansion pawls, the expansion pawl is wrapped in and expands on the head, king-rod is Split type structure: expand head, screw mandrel, connection wire rod, expand head and have hand of spiral tapped hole in the same way with holding in opposite directions of screw mandrel, the connection wire rod two ends are connected with tapped hole respectively; Connection wire rod, screw mandrel, nut to screw direction identical.This patent structure is uncomplicated, but needs first boring, setscrew could be squeezed in the hole.

The patent No. is that 200420118604.8 Chinese patent discloses a kind of setscrew, include a threaded pipe, a Coupling and an expansion sleeve, wherein threaded pipe has a screw section, and its two ends are respectively equipped with a shank and a convergence part, the convergence part is connected with Coupling, Coupling has a tapered portion and a junction, between threaded pipe and Coupling, be provided with an expansion sleeve, expansion sleeve is hollow and annular, the anchor ring of one end offers a plurality of conduits along axial direction, and conduit is positioned at tapered portion one side of Coupling; Thus, can shorten installation time and the usage quantity of setscrew, install rapidly, locate firmly, but have equally first boring, setscrew could be squeezed into the problem in the hole.

Therefore, be necessary existing setscrew is improved.

The model utility content

The purpose of this utility model is, overcomes the defects of prior art, and a kind of novel structure is provided, the disposable certainly brill type setscrew that setscrew is in place.

For achieving the above object, the technological scheme that the utility model provides is as follows: a kind of from brill type setscrew, comprise expansion sleeve, be connected to the king-rod in the expansion sleeve, expansion sleeve comprises body, be arranged on the pipe ring of body rear end, be connected to the drill bit of body front end, body comprises rear body and front inner cone body, the inner of front inner cone body offers the crosswise opening, and the rear portion of front inner cone body offers conical cavity, and the front end of king-rod offers the conehead corresponding with conical cavity, pipe ring offers two symmetrical grooves, and the pipe ring rear end is connected with the rotation tube head.

The front end of rotation tube head offers the revotating card corresponding with two grooves of pipe ring, and the front center of rotation tube head offers the receiving cavity that can hold middle rod rear end cone bar, and rotation tube head rear end offers clamp port.

The front end conehead of king-rod contacts with the conical cavity of front interior canalis spinalis body, and the rear end cone bar of king-rod is socketed in the receiving cavity of the front center of rotating tube head.

Conehead comprises the first conehead, be arranged on the first conehead front portion and be provided with the second conehead, be arranged on the procephalic tri-cone-head of the second cone, the diameter of the first conehead is greater than the second conehead, the diameter of the second conehead is greater than tri-cone-head, and the cylndrical surface of the second conehead to the first conehead is provided with a plurality of anti-back hangnails.

Usefulness of the present utility model is, novel structure, easy to operate, creatively increase drill bit at the setscrew front end, disposable setscrew is holed is in place, do not need to hole separately, again the king-rod hammering in the setscrew is put in place, setscrew is fixed on the wall, quick for installation, reduce the closely workload of half of operator, improved nearly one times working efficiency.

Description of drawings

Fig. 1 is described in the utility model from brill type setscrew perspective view;

Fig. 2 is the decomposing schematic representation of Fig. 1;

Fig. 3 is the cross-sectional view from brill type setscrew described in the utility model;

Fig. 4 is the A-A cross-sectional view of Fig. 3;

Fig. 5 is the use state perspective view from brill type setscrew described in the utility model.

Embodiment

Be further described with regard to the technological scheme of the utility model from brill type setscrew below in conjunction with accompanying drawing and preferred embodiment.

As shown in Figures 1 to 4, described in the utility model a kind of from brill type setscrew, comprise expansion sleeve 1, be connected to the king-rod 2 in the expansion sleeve 1, expansion sleeve 1 comprises body 11, be arranged on the pipe ring 12 of body 11 rear ends, be connected to the drill bit 13 of body 11 front ends, body 11 comprises rear body 14 and front inner cone body 15, the inner of front inner cone body 15 offers the crosswise opening, and the rear portion of front inner cone body 15 offers conical cavity 16, and the front end of king-rod 2 offers the conehead 21 corresponding with conical cavity 16, pipe ring 12 offers being much of groove 17 and lower groove 18, and pipe ring 12 rear ends are connected with rotation tube head 3.

The front end of rotation tube head 3 offers upper revotating card 31, the lower revotating card 32 corresponding with the upper groove 17 of pipe ring 12 and lower groove 18, the front center of rotation tube head 3 offers the receiving cavity 33 that can hold king-rod 2 rear ends cone bar 22, and rotation tube head 3 rear ends offer clamp port 34.

The front end conehead 21 of king-rod 2 contacts with the conical cavity 16 of front interior canalis spinalis body 15, and the cone bar 22 of king-rod 2 rear ends is socketed in the receiving cavity 33 of the front center of rotating tube head 3.

Conehead 21 comprises the first conehead 211, be arranged on the first conehead 211 front portions and be provided with the second conehead 212, be arranged on the tri-cone-head 213 of the second conehead 212 front portions, the diameter of the first conehead 211 is greater than the second conehead 212, the diameter of the second conehead 212 is provided with a plurality of anti-back hangnails 214 greater than the cylndrical surface of tri-cone-head 213, the second coneheads 212 to first coneheads 211.

As shown in Figure 5, the clamp port 34 of rotation tube head 3 rear ends is connected with percussion drill, upper revotating card 31 with rotation tube head 3 front ends, lower revotating card 32 respectively with the upper groove 17 of pipe ring 12, lower groove 18 clampings, start percussion drill, change expansion sleeve 1 over to body of wall, take out the rotation tube head 3 of rear end, with weights such as hammers the conehead 21 of king-rod 2 front ends in the expansion sleeve 1 is squeezed in the conical cavity 16, conical cavity 16 is deformed by the external force extruding, corresponding front inner cone body 15 outer walls outwards expand, whole expansion sleeve 1 is embedded within the walls tightly, avoid traditional first boring, after squeeze into setscrew two the step operational sequences, one-time-reach-place embeds expansion sleeve 1 within the walls, has reduced the closely workload of half of operator, has improved nearly one times working efficiency.

Above-described only is principle of the present utility model and preferred embodiment.Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the utility model principle, can also make some modification and improvement, also should be considered as belonging to protection domain of the present utility model.

Claims

1. one kind from brill type setscrew, comprise expansion sleeve, be connected to the king-rod in the expansion sleeve, it is characterized in that: described expansion sleeve comprises body, be arranged on the pipe ring of body rear end, be connected to the drill bit of body front end, body comprises rear body and front inner cone body, the inner of front inner cone body offers the crosswise opening, the rear portion of front inner cone body offers conical cavity, the front end of king-rod offers the conehead corresponding with conical cavity, and pipe ring offers two symmetrical grooves, and the body rear end is connected with the rotation tube head.

2. according to claim 1 from brill type setscrew, it is characterized in that: the front end of described rotation tube head offers the revotating card corresponding with two grooves of pipe ring, the front center of rotation tube head offers the receiving cavity that can hold middle rod rear end cone bar, and rotation tube head rear end offers clamp port.

3. according to claim 1 and 2 from brill type setscrew, it is characterized in that: the front end conehead of described king-rod contacts with the conical cavity of front interior canalis spinalis body, and the rear end cone bar of king-rod is socketed in the receiving cavity of the front center of rotating tube head.

4. according to claim 1 from brill type setscrew, it is characterized in that: described conehead comprises the first conehead, be arranged on the first conehead front portion and be provided with the second conehead, be arranged on the procephalic tri-cone-head of the second cone, the diameter of the first conehead is greater than the second conehead, the diameter of the second conehead is greater than tri-cone-head, and the cylndrical surface of the second conehead to the first conehead is provided with a plurality of anti-back hangnails.