WO2023036107A1

WO2023036107A1 - Expansion bolt assembly and disassembly tool

Info

Publication number: WO2023036107A1
Application number: PCT/CN2022/117180
Authority: WO
Inventors: 潘树江; 潘云峰
Original assignee: 潘树江
Priority date: 2021-09-08
Filing date: 2022-09-06
Publication date: 2023-03-16
Also published as: CN216913719U; WO2023036106A1; CN216343256U

Abstract

An expansion bolt assembly and disassembly tool, comprising a tool body (5). The tool body is provided with a sleeve (51) for fastening and loosening a nut (4) of the expansion bolt and a jacking pipe (52) of the sleeve (2) for jacking the expansion bolt. The outer diameter of the jacking pipe (52) is less than or equal to the outer diameter of the sleeve, and the inner diameter of the jacking pipe is greater than or equal to the inner diameter of the sleeve. The expansion bolt can be conveniently and effectively assembled and disassembled by using the assembly and disassembly tool.

Description

A disassembly tool for expansion bolts

technical field

The invention belongs to the field of fasteners, and in particular relates to an expansion bolt and a disassembly tool thereof.

Background technique

Expansion bolts are a class of fasteners that are generally used to install objects at present. The existing expansion bolts are sometimes easy to use and sometimes difficult to use. When it is difficult to use, it is mainly manifested in: 1. After the bolt is knocked into the drilled hole, if the drilling error is too large, when the nut is tightened, the whole bolt will rotate, and the nut cannot be tightened. Sometimes the casing does not move, the bolt body will rotate, and the nut cannot be tightened; 2. Sometimes after the nut is tightened and then a little force is tightened, the bolt body is loose, and the nut can no longer be tightened, so there is a certain feeling 3. Sometimes the nut can’t be tightened all the time, and the nut can’t be tightened even if the casing of the drilling hole is twisted and deformed; 4. The expansion bolt will not be tightened shortly after the installation of the object that shakes, vibrates or has a large pull-off force. It will loosen or even come out, causing many troubles and potential safety hazards; 5. Due to the large swing range of the bolt tail, it is easy to damage the drill hole, and the installed objects are not easy to standardize and standardize; Removal also easily destroys the sleeve and cannot be reused.

Contents of the invention

In view of the deficiencies in the background technology, the first purpose of the present invention is to provide a reusable expansion bolt with good stability, firm installation, and the second purpose is to provide a special disassembly tool for the expansion bolt.

The first purpose of the present invention is achieved in this way: an expansion bolt includes a bolt body, a sleeve, a washer and a nut, the bolt body includes a bolt head, a bolt body and a bolt tail of a threaded section, and the sleeve is close to the The head end of the bolt is provided with a cut groove, the head of the bolt is conical, the taper of the taper is ≤1:2, the inner diameter of the sleeve is the same as the major diameter of the thread of the bolt tail, and they are in clearance fit with each other.

The head of the expansion bolt in the prior art is relatively short, that is, the taper of the head is much greater than 1:2, and the casing wall is thinner, and the inner diameter of the casing is much larger than the outer diameter of the bolt body and tail; the bolt head of the present invention adopts the "long head ”, that is, the taper of the bolt head ≤ 1:2. At the same time, under the condition of satisfying the assembly conditions, the inner diameter of the sleeve should be the same as the outer diameter of the bolt body and tail, so as to maximize the wall thickness of the sleeve. The wall thickness is The wall thickness of the prior art casing is more than 2 to 3 times, and the beneficial effects it brings are: 1. During installation and use, when the bolt head is squeezed into the casing, the thicker the casing wall, the larger the expansion, and the larger the expansion will be. The greater the force, the higher the stability, and the tightened bolts are not easy to loosen and fall out. 2. The "long head" structure of the bolt head allows the installer to flexibly use different bolt head slopes to act on the casing to form the expansion force on the drilling wall according to the error of the wall drilling of different materials. to tighten the bolts. In actual use, the maximum expansion of the casing is generally not used to fix the bolt. Generally speaking, if the material is soft or the hole is too large, the nut should be tightened more to increase the expansion. Otherwise, the nut can be tightened less, and the user can choose a different installation. tightness. 3. The "long head" combined with the "thick wall" structure can also make the expansion bolt of the present invention "tighter and tighter". What you get is the expansion force generated by the expansion of the middle section of the bolt head slope and the front end of the casing. When the fixed object moves outward, it will drive the bolt body to move outward. Since the casing is fixed by the friction force with the wall of the borehole, the outward movement of the bolt body will cause the bolt head to further squeeze into the casing to increase the expansion. The expansion force at the position is automatically enhanced, the tightening degree is automatically improved, and the bolt becomes stable, which makes the expansion bolt have a "self-stabilizing" function.

Further, the bolt head is provided with a rib, and the width of the rib near the end of the casing is smaller than the width of the slot. The existing expansion bolts are difficult to take out after installation, and many casings are seriously damaged after being forcibly taken out, and can no longer be used. The ribs provided by the invention are embedded in the cut grooves, and when the bolts are taken out, the casings can be driven to rotate together, and the bolts can be easily taken out. Due to the small deformation of the casing, the taken out expansion bolts can be reused, which reduces waste and saves social resources.

Preferably, the width of the other end of the rib is greater than the width of the end close to the sleeve. This setting is beneficial for the embedding of the ribs into the slots and close fit with the slots.

Further, the groove of the sleeve has a through groove extending to the other end of the sleeve. The setting of the through groove can make the casing shrink due to the narrowing of the drill hole when the bolt is driven in, which increases its applicability. Secondly, it can clamp the bolt body by shrinking, which is conducive to tightening the nut and further reduces shaking. , it can rotate with the main body of the bolt when taking out the bolt, and the rotation will wipe out the debris of the solid screw layer of the drilled hole and store these debris, which is conducive to easy removal of the bolt; another function of the through groove is that it can be removed from the drill during special installation. The hole is wedged with a wedge to increase the tightness of the bolt.

Preferably, the diameter of the bolt body is the same as the major thread diameter of the bolt tail. The major diameter of the bolt tail thread of the existing bolts is generally larger than the diameter of the bolt body, and setting the same diameter of the bolt body and the bolt tail thread can reduce the inner diameter of the casing and further increase the wall thickness of the casing under the same strength of the bolt body.

Preferably, the number of the ribs and the grooves are both 4, and their positions correspond to each other.

Preferably, the outer diameter of the sleeve is in transition fit with the inner diameter of the borehole for installation. Due to the setting of the through groove, the casing can be reduced when the bolt is installed, which makes the outer diameter of the casing can be further enlarged, thereby further increasing the thickness of the casing wall, and improving its installation applicability and reliability.

Expansion bolt of the present invention compares with prior art as follows

The second object of the present invention is achieved in the following way: a disassembly and assembly tool for expansion bolts, including a tool body, a sleeve for loosening the nut and a jack for pushing into the sleeve are provided on the tool body. A pipe, the outer diameter of the jacking pipe is less than or equal to the outer diameter of the casing, and the inner diameter is greater than or equal to the inner diameter of the casing.

Further, the tool body is also provided with a nut to take out, the nut to take out is a blind hole, internally provided with threads, and the threads are matched with the threads of the bolt tail.

Preferably, the tool body is in the shape of a cross, and there are two sleeves, jacking pipes, and nuts. Two ends of the cross-shaped tool body are provided with two sleeves, and the other two ends are provided with two sleeves. Two said jacking pipes are provided with two nuts in the center, and the sizes of the two sleeves, the two jacking pipes and the two nuts are different, forming two sets of dismounting tools of two specifications.

The expansion bolt of the present invention can be installed and disassembled conveniently and effectively by using the assembly and disassembly tool.

Description of drawings

Fig. 1 is the structural representation of a kind of expansion bolt of the present invention;

Fig. 2 is the schematic diagram of the sectional view of Fig. 1;

Fig. 3 is a schematic diagram of the bolt main body;

Fig. 4 is a partial schematic view of the bolt head in Fig. 3;

Fig. 5 is a schematic view of A-A in Fig. 3;

Figure 6 is a schematic diagram of the casing;

Fig. 7 is a schematic diagram of a top view in Fig. 6;

Fig. 8 is a schematic diagram of the right view in Fig. 6;

Fig. 9 is a structural schematic diagram of a dismounting tool for an expansion bolt of the present invention;

Fig. 10 is a schematic diagram of the left view in Fig. 9;

Fig. 11 is a schematic diagram of a B-B direction view in Fig. 10;

In the figure: 1-bolt body, 11-bolt head, 111-convex rib, 12-bolt body, 13-bolt tail, 2-sleeve, 21 slot, 211-through slot, 3-washer, 4-nut , 5, the main body of the tool, 51-sleeve, 52-top pipe, 53-take the nut.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The expansion bolt shown in Figures 1 to 8 includes a bolt body 1, a sleeve 2, a washer 3 and a nut 4. The bolt body 1 includes a bolt head 11, a bolt body 12 and a bolt tail 13 of a threaded section, and the bolt head 11 is a cone. shape, the taper of the taper=1:5, the bolt head 11 is provided with four ribs 111, the width b of the end of the rib 111 near the sleeve 2 is smaller than the width a of the slot 21, and the width c of the other end of the rib 111 greater than the width b near the end of the casing 2, the diameter of the bolt body 12 is the same as the thread diameter of the bolt tail 13, and the casing 2 is provided with four slots 21 near the end of the bolt head 11, one of which extends to the other end of the casing 2 The inner diameter of the sleeve 2 is the same as the major diameter of the screw thread of the bolt tail 13, and they are in clearance fit with each other. The outer diameter of the sleeve 2 is transitionally matched with the inner diameter of the bore hole for installation. One or more "thin-walled" tubes are stacked together to achieve its "thick-walled".

The working principle and working process of the expansion bolt: when installing, the bolt is knocked into the drilled hole. Since the casing 2 and the drilled hole are a transitional fit, the casing 2 will shrink due to the existence of the through-cut groove 211 during this process, so that Close to the bolt body 12, so that the bolt body 1 is less likely to move, tighten the nut 4, the bolt head 11 squeezes into the sleeve 2 to expand, thereby tightening the bolt; when removing, knock the bolt body 1 into the drill hole A little, because the sleeve 2 is thick-walled and the deformation is small, it is generally still in the elastic deformation stage or the microplastic deformation stage. Pipe 2 rotates together, rotates and wipes out the solid screw layer debris of drilling and accommodates these debris by slot 21 and through slot 211, thereby taking out bolt easily.

The dismounting tool of the expansion bolt shown in Figure 9 to Figure 11 includes a cross-shaped tool body 5, and the two ends of the tool body 5 are provided with a sleeve 51 for the elastic nut 4, and the sleeve 51 is an external hexagonal or ring wrench , the other two ends are provided with a jacking pipe 52 for jacking into the casing 2, the outer diameter of the jacking pipe 52 is slightly smaller than the outer diameter of the casing 2, and the inner diameter is slightly larger than the inner diameter of the casing 2, and two back-to-back taking Nut 53, get nut 53 to be a blind hole, set screw thread inside, this thread matches with the screw thread of bolt tail 13, wherein one group of sleeve 51, jack pipe 52, get the specification of nut 53 to be 12, the other The size of the group is 14.

When installing, put the expansion bolt into the drilled hole, and when the casing 2 is blocked, use the jacking pipe 52 of the disassembly tool to push the casing 2 in, and then tighten the nut 4 with the sleeve 51 to complete the installation; 51 Loosen the nut 4, knock the bolt tail 13 into the drill hole a little, then screw the nut 53 into the bolt tail 13, the bolt tail 13 pushes to the bottom of the nut 53 and continue to rotate, the nut 53 will drive the bolt When the main body 1 rotates, the rib 111 on the bolt main body 1 drives the casing 2 to rotate, so that the expansion bolt can be easily taken out.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims

A dismounting tool for expansion bolts, comprising a tool body (5), characterized in that: the tool body (5) is provided with a sleeve (51) for loosening and tightening the nuts (4) of expansion bolts and for jacking in The jacking pipe (52) of the casing (2) of the expansion bolt, the outer diameter of the jacking pipe (52) is less than or equal to the outer diameter of the casing (2), and the inner diameter is greater than or equal to the inner diameter of the casing (2).
The assembly and disassembly tool according to claim 1, characterized in that: the tool body (5) is also provided with a nut (53), the nut (53) is a blind hole with internal threads, the Thread is matched with the thread of the bolt tail (13) of expansion bolt.
The assembly and disassembly tool according to claim 2, characterized in that: the tool body (5) is in the shape of a cross, and the sleeve (51), the jacking pipe (52) and the nut (53) are two , the two ends of the cross-shaped tool body (5) are provided with two sleeves (51), the other two ends are provided with two jacking pipes (52), and the center is provided with two nuts (53) , the sizes of the two sleeves (51), two jacking pipes (52) and two nuts (53) are different, forming two sets of dismounting tools of two specifications.