CN204003873U

CN204003873U - Improved Structure of Expansion Screws

Info

Publication number: CN204003873U
Application number: CN201420450725.6U
Authority: CN
Inventors: 卢诗婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-08-11
Filing date: 2014-08-11
Publication date: 2014-12-10
Anticipated expiration: 2024-08-11

Abstract

The utility model relates to an improved structure of expansion screw especially indicates an expansion screw of utensil drilling function. The drill bit mainly comprises a drill bit screw rod, an expansion sleeve and a nut, wherein the top end of a rod body of the drill bit screw rod is a cone part which protrudes outwards to form a drill bit, drill grains extend backwards, the middle section of the rod body is provided with the screw rod, the tail section of the rod body is provided with threads, and the tail end of the rod body is provided with a clamping column in an extending way; the expansion sleeve is in a hollow cylindrical shape, and one end part of the expansion sleeve is provided with a cutting groove; the nut can be screwed on the thread of the drill screw. When the expansion sleeve is used, the drill bit on the drill bit screw rod is utilized to directly drill into the wall surface to a fixed point, and then the screw cap is screwed in along the thread of the tail section of the drill bit screw rod, so that the cutting groove of the expansion sleeve is expanded and clamped with the wall surface, and the expansion sleeve can be directly used without additionally drilling.

Description

The improvement structure of setscrew

Technical field

The utility model relates to a kind of improvement structure of setscrew, and it establishes a drill bit on screw rod, forms drill bit screw rod, utilizes the tapering of drill bit screw tip directly to pierce wall to fixed point, does not need other boring, setscrew can be inserted to wall.

Background technique

Setscrew is in order to be fixed on by support, suspension bracket, bracket a kind of special link that wall, ground, floor or door pillar etc. use.The existing setscrew structure that tradition is used, refers to shown in Fig. 1, the three-dimensional exploded view of existing setscrew, and this setscrew 1 is mainly comprised of a screw rod 10, a sleeve 11, a nut 12.One end of this screw rod 10 is a tapering extending out 101, and the other end is provided with screw thread 102; One end of this sleeve 11 offers grooving 110.

The structure of relevant setscrew 1, shown in Fig. 2, the combination schematic diagram of existing setscrew, this screw rod 10 is sheathed in sleeve 11, and its tapering 101 exposes to outside sleeve 11, and 12, nut is screwed together on the screw thread 102 of screw rod 10 tail ends.

During use, shown in Fig. 3, the schematic diagram one that existing setscrew is used when will be in wall device setscrew 1, first must get out with drill bit 2 boring 30 of an appropriate depth on wall 3.Then, refer to shown in Fig. 4, the schematic diagram two that existing setscrew is used, setscrew 1 is hammered in the boring 30 of wall 3, then by nut 12, the screw thread 102 along screw rod 10 tail ends is screwed into, utilize tapering 101 extruding of screw rod 10, make the grooving 110 of sleeve 11 expand outwardly distortion, setscrew 1 is fastened and be positioned at wall 3.

Yet, this setscrew 1 is when installing and using, must with drill bit 2, in working face, hole in advance, in addition setscrew 1 is hammered into again, quite inconvenience in use, especially when performing the engineering of a large amount of use setscrews 1, more because complex procedures, cause and cannot complete smoothly or the predicament of waste of manpower.

Model utility content

The utility model designer specializes in improvement, manufacture and the development of screw machine, know very well the disappearance that conventional expanded screw is used, not only construction bothers and wastes man-hour, so be to do one's utmost to think hard solution, and by means of own specialty and working experience for many years, finally after going through correction for several times, test and improving, initiate out the utility model.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of improvement structure of setscrew, it is characterized in that: it is mainly comprised of drill bit screw rod, expansion sleeve and nut, the body of rod top of this drill bit screw rod is drill bit, drill bit is also convexly equipped with a tapering, screw rod is arranged in body of rod stage casing, body of rod tail end is provided with screw thread, and body of rod tail end extension are convexly equipped with a clamping pole; And expansion sleeve is hollow cylindrical, for being sheathed on drill bit screw rod, and be provided with grooving with drill bit engagement end portion; Nut energy spiral shell is located on the screw thread of drill bit screw rod tail end, and it is greater than the caliber of expansion sleeve.

During use, drill bit screw rod is inserted in expansion sleeve, and nut is screwed into expansive screw; Now the clamping pole of drill bit screw rod tail end is fastened on electric drill, utilize the drill bit on drill bit screw rod can directly pierce wall, and can utilize screw rod that residue is discharged, by nut, the screw thread along drill bit screw rod rear is screwed into again, the grooving of expansion sleeve and the tapering of drill bit screw rod are offseted, and outwards expanse and wall form clip.After not needing to hole in advance when using, do not hammer into this setscrew, can directly install and use, quite convenient, laborsaving, install easy and reduce costs.

Accompanying drawing explanation

Fig. 1 is the three-dimensional exploded view of existing setscrew;

Fig. 2 is the combination schematic diagram of existing setscrew;

Fig. 3 is the schematic diagram one that existing setscrew is used;

Fig. 4 is the schematic diagram two that existing setscrew is used;

Fig. 5 is three-dimensional exploded view of the present utility model;

Fig. 6 is combination schematic diagram of the present utility model;

Fig. 7 is the schematic diagram one that the utility model is used;

Fig. 8 is the schematic diagram two that the utility model is used.

Description of reference numerals:

(prior art part) 1-setscrew; 10-screw rod; 101-tapering; 102-screw thread; 11-sleeve; 110-grooving; 12-nut; 2-drill bit; 3-wall; 30-boring;

(the utility model part) 4-setscrew; 40-drill bit screw rod; 401-drill bit; 4011-tapering; 402-bores line; 403-screw rod; 404-screw thread; 405-clamping pole; 41-expansion sleeve; 410-grooving; 42-nut; 5-electric drill; 6-wall.

Embodiment

First, refer to shown in Fig. 5, it is three-dimensional exploded view of the present utility model, it is mainly comprised of this setscrew 4 drill bit screw rod 40, expansion sleeve 41 and nut 42, and the body of rod top of this drill bit screw rod 40 is drill bit 401, and outwardly formation one tapering 4011, extended back and bored line 402, body of rod stage casing is provided with screw rod 403, and body of rod rear is screw thread 404, and body of rod tail end convexes with a clamping pole 405; One expansion sleeve 41, is hollow cylindrical, and wherein an end is provided with grooving 410; One nut 42, it is slightly larger than the external diameter of expansion sleeve 4, can be located on the screw thread 404 of drill bit screw rod 40 by spiral shell.

Secondly, refer to Fig. 6, it is combination schematic diagram of the present utility model, this drill bit screw rod 40 is sheathed in expansion sleeve 41, its drill bit 401 and tapering 4011 expose to grooving 410 one end (please look back shown in Fig. 5) of expansion sleeve 41, and 42, nut is screwed together on the screw thread 404 of drill bit screw rod 40 tail ends.

Then, shown in Fig. 7, it is the schematic diagram one that the utility model is used, the clamping pole 405 of drill bit screw rod 40 tail ends is fastened on electric drill 5, utilize the tapering 4011 of tool brill line 402 on drill bit screw rod 40 can directly pierce wall 6, and produce unnecessary residue, can rely on screw rod 403 to discharge, whole group of setscrew 4 can be goed deep in wall 6.

Finally, shown in Fig. 8, it is the schematic diagram two that the utility model is used, when setscrew 4 pierces after wall 6, screw thread 404 by nut 42 along drill bit screw rod 40 tail ends continues to be screwed into, because this nut 42 is slightly larger than the external diameter of expansion sleeve 41, therefore when being screwed into, this expansion sleeve 41 inwardly can be pushed, the grooving 410 of expansion sleeve 41 is resisted against on the drill bit 401 on body of rod top of drill bit screw rod 40, because this drill bit 401 has the tapering 4011 extending out, make the grooving 410 of expansion sleeve 41 expand outwardly distortion, and form clip with wall 6, and can make this setscrew 4 be fixed on wall 6.

In sum, the utility model will be established a drill bit on the screw rod of setscrew, forms drill bit screw rod, the drill bit that utilizes drill bit screw tip tool to bore line directly pierces wall, do not need other boring, setscrew can be inserted to wall, more traditional more convenient saving time in construction.

Claims

1. An improved structure of an expansion screw, characterized in that: it is mainly composed of a drill screw rod, an expansion sleeve and a nut, the top of the rod body of the drill screw rod is a drill bit, and a cone is protruded from the drill bit, and the middle section of the rod body is set as Screw, the end of the rod body is provided with threads, and the end of the rod body is extended and protrudingly provided with a locking column; the expansion sleeve is hollow cylindrical, which is sleeved on the drill screw, and the joint end with the drill bit is provided with a slot; The nut can be screwed on the thread at the tail end of the drill screw, which is larger than the pipe diameter of the expansion casing.