CN209180192U - A kind of setscrew and its expansion bolt - Google Patents

Abstract

The utility model discloses a kind of setscrew and its expansion bolts, the expansion bolt is adapted to be mounted in a mounting hole of a wall, when a thread cavity to be threadedly connected to the expansion bolt in a screw, the expansion bolt expands in the mounting hole of the wall, the expansion bolt includes a housing body, one inflatable body and at least one deformation rotation stop arm, the housing body has a connecting pin and an exposed junction corresponding to the connecting pin, the inflatable body includes at least two bulges, each bulge integrally extends the connecting pin of the housing body respectively, and a gap is formed between the two neighboring bulge, the shape in the gap is S-shaped, the thread cavity of the expansion bolt extends between each bulge from the exposed junction of the housing body, and the inflatable body Each gap is respectively communicated with the thread cavity, and each rotation stop arm integrally and obliquely extends the connecting pin of the housing body respectively.

Description

A kind of setscrew and its expansion bolt

Technical field

The utility model relates to a kind of setscrews, further, more particularly, to a kind of setscrew and its expansion Bolt.

Background technique

Setscrew includes that a screw and an expansion tube need first in wall before the use in general Aperture on wall, and bore size is slightly larger than the outer diameter of the expansion tube, and the expansion tube is secondly put into opening for the wall In hole, the screw is screwed into the inside of the expansion tube followed by tool and the expansion tube is made to become to expand, to make the spiral shell Silk and the expansion tube are stably maintained in the aperture of the wall.It can be seen that the expansion tube needs to be screwed into it in the screw It can become to expand and be stably installed in the aperture of the wall after internal, therefore, enter this being screwed into the screw During expansion tube, how to prevent the expansion tube and the wall from carrying out relative rotation becomes very important.

Utility model content

One of the utility model is designed to provide a kind of setscrew and its expansion bolt, the one of the setscrew When a screw is screwed into the thread cavity of the expansion bolt, which can rapidly expand, to prevent this in installation swollen During a mounting hole of a wall, which does in the mounting hole of the wall relative to this swollen screw The rotation of wall.

In order to achieve the above object, the utility model provides a kind of expansion bolt, which is adapted to be mounted to one In one mounting hole of wall, when a thread cavity to be threadedly connected to the expansion bolt in a screw, the expanding screw Bolt expands in the mounting hole of the wall, and wherein the expansion bolt includes a housing body, an inflatable body and extremely A few deformation rotation stop arm, the housing body have a connecting pin and an exposed junction corresponding to the connecting pin, this is swollen Swollen main body includes at least two bulges, and each bulge integrally extends the connecting pin of the housing body respectively, and And a gap is formed between the two neighboring bulge, the shape in the gap is S-shaped, and the thread cavity of the expansion bolt certainly should The exposed junction of housing body extends between each bulge, and each gap of the inflatable body is respectively communicated with this Thread cavity, each rotation stop arm integrally and obliquely extend the connecting pin of the housing body respectively.

As the further preferred example of the expansion bolt to the utility model, which has at least one Hollow-out parts, the hollow-out parts are connected to the thread cavity, which further includes at least one expansion rotation stop arm, the expansion rotation stop arm Both ends are connected integrally to the inner wall for being used to form the hollow-out parts of the housing body respectively, so that the expansion rotation stop arm is deformable Ground is maintained at the hollow-out parts of the housing body, which corresponds to the interior of the outer wall with an outer wall and one The outer wall of wall, the expansion rotation stop arm is step surface, and the inner wall of the expansion rotation stop arm protrudes from the thread cavity.

As the further preferred example of the expansion bolt to the utility model, the outer wall of the expansion rotation stop arm has Have multiple steps, each step is arranged mutually adjacently and extends along the length direction of the expansion rotation stop arm, it is each this Rank is respectively provided with low side and high-end corresponding to one of the low side, and wherein the low side of the step is towards the housing body The connection extreme direction, high-end exposed extreme direction towards the housing body of the step, so that the expansion rotation stop The outer wall of arm is step surface.

As the further preferred example of the expansion bolt to the utility model, the gap of the inflatable body is corresponding In the expansion rotation stop arm.

As the further preferred example of the expansion bolt to the utility model, there are two hollow outs for housing body tool Portion, the expansion bolt include two expansion rotation stop arms.

As the further preferred example of the expansion bolt to the utility model, each bulge is respectively provided with down Pierce structure.

As the further preferred example of the expansion bolt to the utility model, which further includes at least one A ending tendon transfer, each ending tendon transfer are integrally formed in the exposed junction of the housing body respectively.

The utility model also provides a kind of setscrew, which includes a screw and an expansion bolt, The expansion bolt includes that a housing body, an inflatable body and at least one deformation rotation stop arm, the housing body have One connecting pin and an exposed junction corresponding to the connecting pin, which includes at least two bulges, each to be somebody's turn to do Bulge integrally extends the connecting pin of the housing body respectively, and a seam is formed between the two neighboring bulge Gap, the shape in the gap are S-shaped, and a thread cavity of the expansion bolt extends to each be somebody's turn to do from the exposed junction of the housing body Between bulge, and each gap of the inflatable body is respectively communicated with the thread cavity, and each rotation stop arm difference is integrally And obliquely extend the connecting pin of the housing body.

The beneficial effect of the setscrew of the utility model is:

(1) shape in the gap formed between two neighboring bulge of the inflatable body of the expansion bolt is S Shape, in this way, the screw can squeeze each bulge and keep the bulge rapid being screwed into the screw when in the thread cavity Expansion so that the outer wall of the expansion bolt rapidly and closely fits in the hole wall of the wall, to avoid the expansion Bolt rotates in the mounting hole of the wall.

(2) expansion bolt at least one expansion rotation stop arm be formed in the housing body, in this way, be screwed into the screw in When in the thread cavity, which can squeeze each expansion rotation stop arm and each expansion rotation stop arm is made to protrude from shell master The mode of body closely fits in the hole wall of the wall, rotates in the mounting hole of the wall to place the expansion bolt.

(3) outer wall of each expansion rotation stop arm of the expansion bolt is step surface, in such manner, it is possible to further increase this The pulling capacity of expansion bolt, with during being screwed into the screw, which can be stably maintained at being somebody's turn to do for the wall In mounting hole.

Other advantages of the utility model and realize that the technical solutions of these above-mentioned advantages in following description will be by It explains in detail and explains.

Detailed description of the invention

In order to obtain the above and other advantage and feature of the utility model, this is practical shown in hereinafter reference will be made to the drawings Novel specific embodiment carries out more specific description to the utility model outlined above.It should be understood that these attached drawings are only The exemplary embodiments of the utility model are shown, therefore are not construed as the limitation to the scope of the utility model, by using Attached drawing will carry out more specific and more detailed description and elaboration to the utility model.In the accompanying drawings:

Fig. 1 is the stereoscopic schematic diagram of the expansion bolt of the setscrew of the utility model.

Fig. 2 is the schematic top plan view of the expansion bolt of the setscrew of the utility model.

Fig. 3 is the schematic side view of the expansion bolt of the setscrew of the utility model.

Fig. 4 A is a using process diagram of the setscrew of the utility model.

Fig. 4 B is another using process diagram of the setscrew of the utility model.

Fig. 4 C is another using process diagram of the setscrew of the utility model.

Fig. 4 D is another using process diagram of the setscrew of the utility model.

Fig. 4 E is another using process diagram of the setscrew of the utility model.

Specific embodiment

It is described below for disclosing the utility model so that those skilled in the art can be realized the utility model.It retouches below Preferred embodiment in stating is only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.It is retouched following The basic principle of the utility model defined in stating can be applied to other embodiments, deformation scheme, improvement project, etc. Tongfangs The other technologies scheme of case and the spirit and scope without departing from the utility model.

It is a kind of setscrew that spirit according to the present utility model provides shown in E as shown in Figure 1 to Figure 4, can pacifies In a mounting hole 10 loaded on a wall 1.The setscrew includes an expansion bolt 2 and a screw 3, the expansion Bolt 2 has a threaded hole 20 should using tool after the expansion bolt 2 is installed in the mounting hole 10 of the wall 1 Screw thread 3 is screwed into the threaded hole 20 of the expansion bolt 2, as the screw thread 3 is screwed into being continuously increased for depth, the expansion bolt 2 constantly expand in the mounting hole 10 of the wall 1, so that the expansion bolt 2 is stably maintained at being somebody's turn to do for the wall 1 In mounting hole 10.

Specifically, the expansion bolt 2 includes 21, inflatable bodies 22 of a housing body as shown in Figure 1 to Figure 4 shown in E And a deformation rotation stop arm 23, the thread cavity 20 of the expansion bolt 2 extend to the inflatable body 22 from the housing body 21. The housing body 21 has a connecting pin 211 and an exposed junction 212 corresponding to the connecting pin 211, the connecting pin 211 The length the housing body 21 can be defined is corresponded to each other with the exposed junction 212.The inflatable body 22 includes at least two swollen Swollen portion 221 and there are at least two gaps 222, each bulge 221 integrally extends the housing body 21 respectively The connecting pin 211, and it is capable of forming the gap 222 between the two neighboring bulge 221, wherein the thread cavity 20 certainly should The exposed junction 212 of housing body 21 extends between each bulge 221, so as to be formed in the two neighboring bulge The gap 222 between 221 is connected to the thread cavity 20.Each rotation stop arm 23 integrally and obliquely extends the shell respectively The connecting pin 211 of main body 21.

Preferably, the quantity of the deformation rotation stop arm 23 is two, and the two of them deformation rotation stop arm 23 is symmetrical respectively Ground setting, as shown in Figure 1.Optionally, the quantity of the deformation rotation stop arm 23 is three or more, these deformation rotation stop arms 23 are surround In the surrounding of the housing body 21.

Further, which has at least one hollow-out parts 213, which is connected to the thread cavity 20. The expansion bolt 2 further includes at least one expansion rotation stop arm 24, and the both ends of the expansion rotation stop arm 24 are connected integrally to this respectively The inner wall for being used to form the hollow-out parts 213 of housing body 21, so that the expansion rotation stop arm 24 is held in the housing body 21 The hollow-out parts 213, and the expansion rotation stop arm 24 can the hollow-out parts 213 of the housing body 21 deform and expand.It is excellent The extending direction of selection of land, the expansion rotation stop arm 24 is consistent with the extending direction of the housing body 21.

Shown in E as shown in Figure 1 to Figure 4, which corresponds to the outer wall 241 with an outer wall 241 and one An inner wall 242, the outer wall 241 of the expansion rotation stop arm 24 is step surface, and the inner wall 242 of the expansion rotation stop arm 24 protrudes In the thread cavity 20, when the screw 3 acts on the inner wall 242 of the expansion rotation stop arm 24 the expansion rotation stop arm 24 is expanded Afterwards, the outer wall 241 of the formation step surface of the expansion rotation stop arm 24 can closely fit in the hole wall of the wall 1, so that this is swollen Swollen rotation stop arm 24 can not only cooperate the deformation rotation stop arm 23 to prevent the expansion bolt 2 from turning in the mounting hole 10 of the wall 1 It is dynamic, and the outer wall 241 of the formation step surface of the expansion rotation stop arm 24 can increase the pulling capacity of the expansion bolt 2, thus It avoids extracting the expansion bolt 2 out of the wall 1 the mounting hole 10 during being screwed into screw 3.

Specifically, the outer wall 241 of the expansion rotation stop arm 24 has multiple steps 243, each step 243 is mutually adjacent Near-earth is arranged and extends along the length direction of the expansion rotation stop arm 24, and each step 243 is respectively provided with a low side 2431 and one correspond to high-end the 2432 of the low side 2431, wherein the low side 2431 of the step 243 is towards shell master 211 direction of connecting pin of body 21, this is high-end 2432 towards 212 direction of exposed junction of the housing body 21, so that should The outer wall 241 for expanding rotation stop arm 24 forms step surface.

Preferably, the gap 222 of the inflatable body 22 corresponds to the expansion rotation stop arm 24, in such manner, it is possible to further increase Add the anti-rotation effect of the expansion bolt 2 and increases the pulling capacity of the expansion bolt 2.

It is highly preferred that there are two symmetrical hollow-out parts 213 for the housing body 21 tool, and correspondingly, the expansion bolt 2 tool There are two symmetrical expansion rotation stop arms 24, are somebody's turn to do in such manner, it is possible to further increase the anti-rotation effect of the expansion bolt 2 and increase The pulling capacity of expansion bolt 2.The inflatable body 22 include two bulges 221 and be formed in two bulges 221 it Between two gaps 222 so that each of the inflatable body 22 gap 222 can correspond respectively to each expansion Rotation stop arm 24.

As shown in Figure 1, each bulge 221 is respectively equipped with barb structure 223 and is conducive to increase the expansion bolt 2 Pulling capacity.In addition, the expansion bolt 2 further includes at least one ending tendon transfer 25, each ending tendon transfer 25 is integrally formed in respectively Exposed junction 212 of the housing body 21, to further increase the anti-rotation effect of the expansion bolt 2.

In the setscrew of the utility model, which is integral structure, for example, the expansion bolt 2 The housing body 21, the inflatable body 22, the deformation rotation stop arm 23, the expansion rotation stop arm 24 and the ending tendon transfer 25 can be logical Cross the integral structure that the mode of injection molding is formed.

Such as Fig. 4 A to Fig. 4 E, the usage mode of the setscrew of the utility model are as follows:

The mounting hole 10 is opened up on the wall 1, the mode opened up, which can be, drills out one on the wall 1 using electric drill The mounting hole 10 of outer diameter identical as the outer diameter of the expansion bolt 2 or slightly larger than the expansion bolt 2.

The expansion bolt 2 is installed in the mounting hole 10 of the wall 1, at this point, the exposed junction of the expansion bolt 2 212 are exposed to outside, and the inflatable body 22 of the expansion bolt 2 is maintained at the inside of the wall 1, and the expansion bolt 2 The free end of each deformation rotation stop arm 23 is squeezed and be slightly deformed by the hole wall of the wall 1, so that the expansion bolt 2 It is able to maintain in the mounting hole 10 of the wall 1.

The screw 3 is screwed into the threaded hole 20 of the expansion bolt 2 using tool (such as screwdriver), in the early stage rank Section, each deformation rotation stop arm 23 can prevent the expansion bolt 2 from doing the rotation relative to the wall 1；With twisting for the screw 3 Enter the increase of depth, which can squeeze the inner wall 242 of each expansion rotation stop arm 24 first and make each expansion Rotation stop arm 24 expands outward, and the outer wall 241 of the step surface of each expansion rotation stop arm 24 can fit in or even squeeze the wall 1 Hole wall, and further prevent the expansion bolt 2 to do the rotation relative to the wall 1 by each expansion rotation stop arm 24, and And increases the pulling capacity of the expansion bolt 2 and extracted out of this wall 1 to avoid the expansion bolt 2；With being screwed into for the screw 3 Depth further increases, which can be pressed further by each bulge 221 of the inflatable body 2, because being formed in phase The shape in the gap 222 between adjacent two bulges 221 is S-shaped, and for traditional expansion bolt, each this is swollen Swollen portion 221 is easier to be squeezed and expanded by the screw 3, in this way, after the extruding force by the screw 3, each bulge 221 can promptly expand and squeeze the hole wall of the wall 1, so that the expansion bolt 2 steadily and is reliably held at this In the mounting hole 10 of wall 1.

Only the most preferred embodiment of the utility model is described above, but is not to be construed as the limit to claim System.The utility model is not only limited to above embodiments, and specific structure is allowed to vary.It is all in the utility model independent right It is required that protection scope in made various change in scope of protection of the utility model.

Claims (10)

1. a kind of expansion bolt is adapted to be mounted in a mounting hole of a wall, to be threadably coupled in a screw When a thread cavity of the expansion bolt, which expands in the mounting hole of the wall, which is characterized in that this is swollen Swollen bolt includes that a housing body, an inflatable body and at least one deformation rotation stop arm, the housing body have one Connecting pin and an exposed junction corresponding to the connecting pin, the inflatable body include at least two bulges, each expansion Portion integrally extends the connecting pin of the housing body respectively, and a gap is formed between the two neighboring bulge, The shape in the gap is S-shaped, and the thread cavity of the expansion bolt extends to each expansion from the exposed junction of the housing body Between portion, and each gap of the inflatable body is respectively communicated with the thread cavity, and each rotation stop arm integrally and inclines respectively Tiltedly extend the connecting pin of the housing body.

2. a kind of expansion bolt as described in claim 1, which is characterized in that the housing body has at least one hollow-out parts, The hollow-out parts are connected to the thread cavity, which further includes at least one expansion rotation stop arm, the both ends point of the expansion rotation stop arm It is not connected integrally to the inner wall for being used to form the hollow-out parts of the housing body, so that the expansion rotation stop arm deformable ground is kept In the hollow-out parts of the housing body, which has an outer wall and an inner wall corresponding to the outer wall, should The outer wall for expanding rotation stop arm is step surface, and the inner wall of the expansion rotation stop arm protrudes from the thread cavity.

3. a kind of expansion bolt as claimed in claim 2, which is characterized in that the outer wall of the expansion rotation stop arm has multiple Rank, each step are arranged mutually adjacently and extend along the length direction of the expansion rotation stop arm, each step difference It is high-end with a low side and corresponding to one of the low side, the wherein company of the low side of the step towards the housing body Extreme direction is connect, high-end exposed extreme direction towards the housing body of the step, so that the expansion rotation stop arm is somebody's turn to do Outer wall is step surface.

4. a kind of expansion bolt as claimed in claim 3, which is characterized in that the gap of the inflatable body corresponds to the expansion Rotation stop arm.

5. such as any one of a kind of expansion bolt in claim 2-4, which is characterized in that the housing body has two A hollow-out parts, the expansion bolt include two expansion rotation stop arms.

6. such as any one of a kind of expansion bolt in claim 1-4, which is characterized in that each bulge difference With barb structure.

7. a kind of expansion bolt as claimed in claim 5, which is characterized in that each bulge is respectively provided with barb structure.

8. such as any one of a kind of expansion bolt in claim 1-4, which is characterized in that the expansion bolt further includes At least one ending tendon transfer, each ending tendon transfer are integrally formed in the exposed junction of the housing body respectively.

9. a kind of expansion bolt as claimed in claim 5, which is characterized in that the expansion bolt further includes at least one rotation stop Muscle, each ending tendon transfer are integrally formed in the exposed junction of the housing body respectively.

10. a kind of setscrew, which is characterized in that the setscrew includes a screw and an expansion bolt, the expansion Bolt includes that a housing body, an inflatable body and at least one deformation rotation stop arm, the housing body have a company End and an exposed junction corresponding to the connecting pin are connect, which includes at least two bulges, each bulge The connecting pin of the housing body is integrally extended respectively, and a gap is formed between the two neighboring bulge, it should The shape in gap is S-shaped, and a thread cavity of the expansion bolt extends to each expansion from the exposed junction of the housing body Between portion, and each gap of the inflatable body is respectively communicated with the thread cavity, and each rotation stop arm integrally and inclines respectively Tiltedly extend the connecting pin of the housing body.