CN203257829U

CN203257829U - Self-tapping self-drilling expansion screw

Info

Publication number: CN203257829U
Application number: CN 201320235886
Authority: CN
Inventors: 曹广振
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-03
Filing date: 2013-05-03
Publication date: 2013-10-30
Anticipated expiration: 2023-05-03

Abstract

The utility model discloses a self tapping is from boring and is drawn and explode inflation screw, including inflation screw and lock sleeve, the inflation screw includes a screw rod, and the outside cover of screw rod is equipped with the expansion pipe, and the expansion pipe end has set gradually gasket, elastic ring and hexagon nut, and the screw rod top is connected with rotary drill, and flat position is left to the screw thread bottom of screw rod, and lock sleeve upper portion is the sleeve pipe, and the sleeve pipe top is provided with first solid fixed ring, and gu the fixed ring lower extreme overlaps in proper order and is equipped with fixed cover, expanding spring and the solid fixed ring of second. The utility model discloses creatively increases the drill bit at the screw rod front end of inflation screw to once only target in place the direct drilling installation of inflation screw through the connection screens of inflation screw end-to-end connection's lock sleeve, need not drill separately, rethread is twisted and is moved the lock sleeve and fix the inflation screw on the wall, and the installation is swift, and easy operation has reduced the nearly half work load of operation workman, has improved nearly one time work efficiency.

Description

Self tapping draws quick-fried setscrew from boring

Technical field

The utility model relates to five metals and connects workpiece, relates in particular to a kind of self tapping that reduces production costs, increases work efficiency, improves working strength and draws quick-fried setscrew from boring.

Background technique

Chinese patent application number: 200420104870.5, a kind of screw of once attacking nail is disclosed, comprise: body, packing screw, drill bit, wherein this body is a hollow lever, can be for being installed with the packing screw, this packing screw one end is provided with the nose cone that coincide with the body interior conical bore, this cone headed end face is provided with and can supplies the sheathed driver slot of instrument, this packing screw another end is provided with the external screw thread that screws togather with the body interior inner bolt hole, this external screw thread passes outside the body, can establish for the drill bit lock, this body exterior still is provided with the helical double wedge; During operation with the tool drives screw, holed in the precalculated position by drill bit, body can and then be rotated to be imbedded, until the body head is can't lock the time, this screw body namely maintains static, the external screw thread of packing this moment screw still continues to be screwed into the inner bolt hole of body, forces body exterior to produce the metamorphosis that outwards expands, and screw can closely be fixed on the precalculated position.This patent structure is complicated, needs first boring, setscrew could be squeezed in the hole, reduces working efficiency.

And for example the applicant is in the Chinese patent application of first to file number: 201220380088.0, disclose 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 body rear end is connected with the rotation tube head.

The utility model patent creatively increases drill bit at the screw front end of setscrew, and by the terminal lock sleeve that connects of setscrew disposable with setscrew directly boring be in place, do not need to hole separately, by turning lock sleeve setscrew is fixed on the wall again, quick for installation, simple to operate, reduced the closely workload of half of operator, improved nearly one times working efficiency.

The model utility content

The purpose of this utility model is, overcomes the defects of prior art, provides a kind of self tapping to draw quick-fried setscrew from boring.

For achieving the above object, the technological scheme that provides of the utility model is as follows:

A kind of self tapping draws quick-fried setscrew from boring, and comprises setscrew and lock sleeve, and setscrew comprises a screw rod, the screw rod outer cover is provided with expansion tube, the expansion tube end is disposed with pad, elastic force ring and hexagon nut, and screw tip is connected with roller bit, and flat position is left in the screw flight bottom.

Lock sleeve top is sleeve pipe, and cannula tip is provided with the first retaining ring, and the sleeve pipe lower end is arranged with the second retaining ring, is arranged with successively fixed cover and coil tension spring between the first retaining ring and the second retaining ring.

Be arranged with Quick clamping screw on the sleeve pipe, the Quick clamping screw lower end is provided with reset tension spring.

The lock sleeve bottom connects screens top and inserts inside pipe casing for connecting screens, and sleeve pipe forms open-topped with the Connection Card position, the cavity body structure of bottom sealing, and cannula cavity is provided with screw thread, and the inner chamber bottom offers the locating slot with flat phase contraposition of screw rod.

Sleeve pipe and expansion tube structural similarity.

Roller bit is tapered brill, and the roller bit bottom is provided with hangnail.

Usefulness of the present utility model is, creatively the screw front end at setscrew increases drill bit, and by the connection screens of the terminal lock sleeve that connects of setscrew disposable with setscrew directly boring be in place, do not need to hole separately and hammer into shape and strike, by turning lock sleeve setscrew is fixed on the wall again, quick for installation, simple to operate, reduce the closely workload of half of operator, improved nearly one times working efficiency.

Description of drawings

Fig. 1 is that the utility model self tapping draws quick-fried setscrew first embodiment's schematic representation from boring;

Fig. 2 is that the utility model self tapping draws the described setscrew sectional drawing of quick-fried setscrew from boring;

Fig. 3 is that the utility model self tapping draws quick-fried setscrew first embodiment's lock sleeve sectional drawing from boring;

Fig. 4 is that the utility model self tapping draws the described screw rod schematic representation of quick-fried setscrew from boring;

Fig. 5 is that the utility model self tapping draws the described expansion tube schematic representation of quick-fried setscrew from boring;

Fig. 6 is that the utility model self tapping draws quick-fried setscrew second embodiment's schematic representation from boring.

Embodiment

Be further described with regard to the technical solution of the utility model below in conjunction with accompanying drawing and preferred embodiment.

Extremely shown in Figure 5 such as Fig. 1, a kind of self tapping described in the utility model draws quick-fried setscrew the first embodiment from boring: comprise setscrew 1 and lock sleeve 2, setscrew 1 comprises a screw rod 11, screw rod 11 outer cover are provided with expansion tube 12, expansion tube 12 bottoms are disposed with pad 13, elastic force ring 14 and

hexagon nut

15,11 screw tip are connected with roller bit 16, and the screw thread bottom of screw rod 11 is provided with flat position 17.

Lock sleeve 2 tops are sleeve pipe 21, and sleeve pipe 21 tops are provided with the first retaining ring 211, the first retaining rings 211 lower ends and are arranged with successively movable fixed cover 212, coil tension spring 213 and the second retaining ring 214.

Lock sleeve 2 bottoms are for connecting screens 22, connect screens 22 tops and insert sleeve pipe 21 inside, sleeve pipe 21 with is connected screens 22 composition open-toppeds, the cavity body structure that the bottom is sealed, sleeve pipe 21 inner chambers are provided with screw thread 215, and the inner chamber bottom offers the locating slot 23 with the flat position 17 phase contrapositions of screw rod 11.

Sleeve pipe 21 and expansion tube structural similarity.

Roller bit 16 is tapered brill.

As mentioned above, fixed cover 212 on the drop-down lock sleeve 2, sleeve pipe 21 mouths of pipe open, with setscrew 1 terminal the insertion in the sleeve pipe 21, discharge fixed cover 212 and tightly lock at the effect of the coil tension spring 213 elastic force sleeve pipe 21 of ordering, to connect screens 22 and be inserted in percussion drill, electric drill or the electric hammer, start, and can directly setscrew 1 be pierced body of wall; Take off percussion drill, electric drill or electric hammer, on the other hand with the fixed cover 212 on the lock sleeve 2 toward pulling back, take off simultaneously lock sleeve 2 and percussion drill, then turn hexagon nut 15 on the setscrew 1 with spanner, whole setscrew 1 is tightly embedded within the walls.

As shown in Figure 6, a kind of self tapping described in the utility model draws quick-fried setscrew the second embodiment from boring: fixed cover 212, coil tension spring 213 sheathed in the first retaining ring 211 in lock sleeve 2 upper sleeve 21, the second retaining ring 214 and the sleeve pipe 21 are replaced by Quick clamping screw 217, Quick clamping screw 217 lower ends are provided with reset tension spring 218, sleeve pipe 21 screw sections are fixing on one side, and another side can be movable along with turning of Quick clamping screw 217.More than, Quick clamping screw 217 inside are the eccentric circle (not shown), control the opening and closing of sleeve pipe 21 by the eccentric shaft cambered surface size variation of Quick clamping screw 217 eccentric circles.

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. A self-tapping self-drilling expansion screw, including an expansion screw and a locking sleeve, the expansion screw includes a screw rod, the screw rod is covered with an expansion tube, and the end of the expansion tube is sequentially provided with a gasket, an elastic ring and a hexagonal nut, It is characterized in that: the top of the screw is connected with a rotary drill bit, and the bottom of the thread of the screw has a flat position.

2. The self-tapping self-drilling expansion screw according to claim 1, characterized in that: the upper part of the locking sleeve is a sleeve, the top of the sleeve is provided with a first fixing ring, and the lower end of the sleeve is provided with a second ring. As for the fixed ring, a fixed sleeve and a telescopic spring are sequentially sleeved between the first fixed ring and the second fixed ring.

3. The self-tapping, self-drilling and exploding expansion screw according to claim 2, characterized in that: a fast fastening screw is provided on the casing sleeve, and a return tension spring is provided at the lower end of the fast fastening screw.

4. The self-tapping self-drilling expansion screw according to claim 1, characterized in that: the lower part of the locking sleeve is a connecting clamping position, the upper part of the connecting clamping position is inserted into the casing, and the casing and the connecting clamping position form the top end The cavity structure is open and closed at the bottom. The inner cavity of the casing is provided with threads, and the bottom end of the inner cavity is provided with a positioning groove opposite to the flat position of the screw.

5. The self-tapping, self-drilling and exploding expansion screw according to claim 1 or 2, characterized in that: the casing is similar in structure to the expansion tube.

6. The self-tapping self-drilling expansion screw according to claim 1, characterized in that: the rotary drill bit is a conical drill, and the bottom of the drill bit is provided with barbs.