CN2409371Y

CN2409371Y - Detachable reusable expansion screw

Info

Publication number: CN2409371Y
Application number: CN00211035U
Authority: CN
Inventors: 孙宗仰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-09
Filing date: 2000-03-09
Publication date: 2000-12-06
Anticipated expiration: 2010-03-09
Also published as: WO2001066961A1; AU2001235322A1

Abstract

The utility model relates to a detachable and reusable expansion screw which is composed of an expansion mandrel, an expansion casing tube and an adjusting tube. The functions of tightening or loosening the adjusting tube can still be utilized besides the fixation function of the original expansion screws. Fixation force can be adjusted to a great extent according to the requirements of users. The detachable and reusable expansion screw has the characteristic that the utility model can overcome the defect that the expansion screws are difficult to be taken out in the past. Thus, the purpose of reusability is achieved.

Description

Removable and can re-use setscrew

The utility model is the setscrew about a kind of fixedly usefulness, utilizes the tube drawing of tearing open of the present utility model, is available for users to adjust retention force, more the setscrew in using can be removed, and reuses.

Generally in order to bear the mode of hanging strength, locking (such as screw) except directly knocking in (such as iron nail) or revolve with external force now, is to utilize the expansion pawl on the setscrew to be expanded in the aperture that cutter is established, till solid fully lock.

Use this setscrew the most widely, as building, decoration or ironworker's industry, though use frequently, the user faces following problem can't obtain good settling mode, for example:

1. the strength of solid lock can't increase.

2. can't remove easily after fixing.

3., can stay ugly surface if it is wiped out.

4., cause the trouble of secondary construction if the mode of removing with sled is very likely operated the damage wall.

5. the setscrew of being removed can't be reused, and forms many wastes.

The purpose of this utility model is to provide a kind of removable, the reusable setscrew that can adjust solid lock power even.Utilize the utility model can solve above-mentioned every shortcoming easily,, make that the power of locking can be adjusted admittedly in its mode of adjusting pipe packing expansion pawl; Again, this adjustment pipe more can force the expansion pawl to be regained, and makes setscrew be reused.

The utility model is a kind of removable and setscrew that can re-use, and it includes (seeing also Fig. 1 and Fig. 2):

One built-up mandrel 10, its front end are provided with one and have the expansion-head 11 of tapering, in order to collapse out the expansion pawl 21 on the expansion sleeve 20; On this built-up mandrel 10 and be provided with screw thread 12, can be screwed togather with expansion sleeve 20; Its tail end end face is provided with a hexagonal groove 13 again, can make things convenient for mode to use; One expansion sleeve 20, its internal surface is provided with screw thread 23B, and outer surface is provided with screw thread 22A; The front end of this expansion sleeve 20 offers the expansion pawl 21 of suitable length, in order to be sticked among the hole, make setscrew be fixed, and tail end also is provided with a tight lock part 24, so that use when fixing or disassemble or assemble; The tail end of this expansion pawl 21 also can be provided with an outside chamfering, to increase reinforced lock power; One adjusts pipe 30, and its length is long than expansion sleeve 20, in order to tighten up the expansion pawl 21 of expansion sleeve 20; Its inner face is provided with screw thread 32, and in order to being screwed together in the outer surface thread 22A of expansion sleeve 20, but front end is near expansion pawl 21 places, is that a smooth surface and its are provided with the protruding grain 33 of several guidings, can make things convenient for convergent-divergent pawl 21; Its tail end is provided with one polygonal tight lock part 31, make to adjust pipe 30 and can utilize instrument such as spanner to be screwed together on the outer surface of expansion sleeve 20.

The utility model can utilize packing or the lax function of adjusting pipe except that the fixed function with former setscrew, make retention force need significantly adjust according to the user.Another characteristic of the present utility model are: can overcome the shortcoming that setscrew in the past is difficult to take out, and then reach reusable purpose.

Description of drawings:

Fig. 1 is the utility model first embodiment's a three-dimensional exploded view.

Fig. 2 is the utility model first embodiment's a sectional exploded view.

Fig. 3 is the utility model first embodiment's a section constitutional diagram.

Fig. 4 is the utility model second embodiment's a three-dimensional exploded view.

Among the figure 10 is built-up mandrel, and 11 is expansion-head, and 12 is screw thread, and 13 is hexagonal groove, and 20 is expansion sleeve, 21 are the expansion pawl, and 22 is screw thread A, and 23 is screw thread B, and 24 is tight lock part, and 30 for adjusting pipe, 31 is tight lock part, and 32 is screw thread, and 33 are the protruding grain of guiding, and 40 is HEX HEAD CAP SCREWS.

In order to make the auditor can further understand novelty of the present utility model and practical part, the utility model cooperation illustrates as follows:

The tail end of this built-up mandrel 10 is provided with a polygonal and tight lock part that can use for spanner, or the end face of this tail end also can be offered the groove 13 of a word or hexagonal, use for screwdriver or hexagon wrench, thereby collapse out when installing or prevent that the expansion pawl 21 on the expansion sleeve 20 from sliding when removing.Expansion pawl 21 tops of these expansion sleeve 20 front ends can be provided with an outside chamfering, make the solid lock power of setscrew increase.The expansion pawl 21 that these expansion sleeve 20 front ends are offered, can utilize adjustment pipe 30 to loosen backward earlier, outwards screw out built-up mandrel 10 again, make expansion pawl 21 outwards separate again, the last mode of locking expansion sleeve 20 again, force expansion pawl 21 to remake outwards collapsing out or reflexed of an angle, the user also can optionally can repeat the several above-mentioned steps to strengthen the reflexed angle, therefore significantly increases the solid lock power of expansion pawl 21.

During installation, at first bore an aperture, again the utility model is inserted as adjusting the hole of pipe 30 external diameters; Utilize two HEX HEAD CAP SCREWS 40 interlockings in the tail end of built-up mandrel 10 subsequently again, tight lock part 24 on the sleeve of fixed expansion simultaneously 20, make this built-up mandrel 10 can utilize instruments such as spanner to be screwed togather, so will collapse out the expansion pawl 21 on the expansion sleeve 20, and lock in the hole admittedly; Be screwed together on the expansion pawl 21 adjusting pipe 30 more at last, directly lock in the hole.In this example,, a polygonal plane also can be set on the tail end of built-up mandrel 10 substitute (seeing also Fig. 4) if when not using two HEX HEAD CAP SCREWS; Simultaneously, the pawl number or the shape of expansion pawl can increase or change with the working face material is different.If when the aperture of establishing of cutting a hole is slightly less than the external diameter of adjusting pipe 30, the user can insert built-up mandrel 10 and expansion sleeve 20 earlier, elder generation is with the tight lock part 24 of a spanner fixed expansion pawl 21, again built-up mandrel 10 is screwed out, expansion sleeve 20 was opened because of collapsing of expansion pawl 21 and was fixed in the hole this moment, locked in the hole till the lock state admittedly adjusting pipe 30 more at last.So far, it is fixing in screw axle 10 to adjust pipe 30, and the pawl 21 that expands simultaneously also is not subjected to the influence of external force, compared to traditional setscrew firm strength is arranged more.

If when wanting to increase grip, at first with the utility model as above step be mounted to stationary state, utilize adjustment pipe 30 to loosen oppressed and open expansion pawl 21 backward again, and then to screw out the mode of built-up mandrel 10, force expansion pawl 21 to separate again, lock again at last and adjust pipe 30, force expansion pawl 21 to make the outside reflexed of an angle, therefore significantly increase the solid lock power of expansion pawl 21; And user's repeat number optionally time above-mentioned steps, to strengthen the angle of reflexed.

During dismounting, at first as above-mentionedly utilize two HEX HEAD CAP SCREWS 40 interlockings, again built-up mandrel 10 inwardly rotate in the tail end of built-up mandrel 10, so this built-up mandrel 10 and expansion sleeve 20 mutual extrusion no longer; And then screw in to adjust pipe 30 and oppress on expansion sleeve 20, this moment can be so that the expansion pawl is easy to shrink to be loosened because adjust the protruding grain 33 of leading of front end on the pipe 30, thereby removes setscrew.

When carrying out above-mentioned steps, the needs of visual reality needing to determine whether the tight lock part 24 on the fixed expansion sleeve 20.If built-up mandrel 10 produces the phenomenon of sliding with expansion sleeve 20, can consider the hexagonal groove 13 on the fixed expansion axle 10 this moment, in order to dismounting.

By the various embodiments described above novelty of the present utility model as can be known and practical part, and the above embodiments are to be used for describing in detail the purpose of this utility model, feature and effect, for being familiar with this type of skill personage, according to the above description, may do part change and modification to this specific embodiment, and not detach spiritual category of the present utility model.

Claims

1. removable and can re-use setscrew is characterized in that it includes:

One built-up mandrel (10), its front end are provided with one and have the expansion-head (11) of tapering, and screw thread (12) is gone up and be provided with to this built-up mandrel (10);

One expansion sleeve (20), its inside and outside surface all is provided with screw thread, and the front end of this expansion sleeve (20) offers expansion pawl (21), and its tail end is provided with one polygonal tight lock part (24);

One adjusts pipe (30), and its inner face is provided with screw thread (32), and front end locates to be a smooth surface and to which is provided with several protruding grains of guiding (33) that its tail end is provided with one polygonal tight lock part (31) near expansion pawl (21).

2. according to the described removable and setscrew that can re-use of claim 1, it is characterized in that the tail end of this built-up mandrel (10) is provided with a polygonal tight lock part, or the end face of this tail end also can be offered the groove (13) of a word or hexagonal.

3. according to the described removable and setscrew that can re-use of claim 1, it is characterized in that expansion pawl (21) top of this expansion sleeve (20) front end is provided with an outside chamfering.