CN211501236U - Expansion screw and locking device - Google Patents

Abstract

The application discloses inflation screw and locking device, this inflation screw includes: the expansion pipe is axially arranged to be of a hollow structure and comprises a hook part and an expansion part which are axially arranged; and the rod body is arranged in the expansion pipe in a penetrating way and used for enabling the expansion part of the expansion pipe to expand outwards along the radial direction. The expansion screw provided by the application can be detached.

Description

Expansion screw and locking device

Technical Field

The application relates to the technical field of screws, in particular to an expansion screw and a locking device.

Background

As shown in fig. 1 to 3, the expansion screw 100 includes an expansion tube 110 and a rod 120 penetrating the expansion tube 110, one end of the rod 120 includes a tapered head 121, and the expansion screw 100 is fixed by using the slope of the tapered head 121 to cause the expansion tube 110 to expand and generate a friction force with the mounting hole 130, so that the rod 120 is clamped in the mounting hole 130, thereby achieving the purpose of locking.

The inventor of this application discovers, want to take out the inflation screw from the mounting hole after using at present, complex operation, and the operation degree of difficulty is big for the dismantlement personnel have to remain the inflation screw at the mounted position, thereby cause the inflation screw can not used repeatedly, cause some potential safety hazards even.

SUMMERY OF THE UTILITY MODEL

The main technical problem who solves of this application provides an inflation screw and locking device, can be convenient for the inflation screw take out from the mounting hole.

In order to solve the technical problem, the application adopts a technical scheme that: there is provided an expansion screw comprising: the expansion pipe is axially arranged to be of a hollow structure and comprises a hook part and an expansion part which are axially arranged; and the rod body is arranged in the expansion pipe in a penetrating mode and used for enabling the expansion part of the expansion pipe to expand outwards in the radial direction.

In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a locking device comprising an expansion screw, the expansion screw comprising: the expansion pipe is axially arranged to be of a hollow structure and comprises a hook part and an expansion part which are axially arranged; and the rod body is arranged in the expansion pipe in a penetrating mode and used for enabling the expansion part of the expansion pipe to expand outwards in the radial direction.

The beneficial effect of this application is: the expansion screw in this application includes along the colluding portion and the inflation portion that the axial set up through setting up the inflation pipe to make when the inflation pipe is in non-inflation state, outside instrument such as lifting hook can collude the inflation pipe and pull out the inflation pipe from the mounting hole through colluding the portion of hanging, realizes the dismantlement of expansion screw.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic cross-sectional view of a prior art expansion screw;

FIG. 2 is a schematic view of the expansion screw of FIG. 1 in an expanded condition;

FIG. 3 is a schematic view of the expansion screw of FIG. 1 installed in the mounting hole;

FIG. 4 is a cross-sectional view of an embodiment of the expansion screw of the present application;

FIG. 5 is a schematic view of the expansion screw of FIG. 4 installed in the mounting hole;

FIG. 6 is a schematic view of a portion of the expansion conduit of FIG. 4;

fig. 7 is a schematic cross-sectional view of the expansion screw of fig. 4 in an application scenario.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 4 and 5, fig. 4 is a schematic cross-sectional view of an embodiment of the expansion screw of the present application, and fig. 5 is a schematic view of the expansion screw of fig. 4 installed in the installation hole. The expansion screw 200 includes an expansion tube 210 and a shank 220.

The expansion pipe 210 is provided in a hollow structure in the axial direction, and includes a hooking portion 211 and an expansion portion 212 provided in the axial direction. Wherein an external tool such as a hook or the like can hook the expansion pipe 210 through the hooking portion 211.

The rod body 220 is inserted through the expansion tube 210 for expanding the expansion portion 212 of the expansion tube 210 radially outward.

Specifically, when the expansion screw 200 fixing device is used, the expansion screw 200 is inserted into the mounting hole 230, and then an external force is applied to pull the rod body 220 away from the mounting hole 230 so as to expand the expansion portion 212 of the expansion tube 210 radially outward, so that the expansion tube 210 is clamped between the mounting hole 230 and the rod body 220, and finally the rod body 220 is locked in the mounting hole 230.

When the expansion screw 200 in this embodiment needs to be removed, an external force is applied to the rod body 220 to move the rod body 220 in the direction of penetrating into the installation hole 230 until the expansion portion 212 of the expansion tube 210 returns to the original shape, at this time, the friction between the expansion tube 210 and the installation hole 230 disappears, and then the user can use an external tool such as a hook to hook the expansion tube 210, apply the external force to pull the expansion tube 210 out of the installation hole 230, and finally take the rod body 220 out of the installation hole 230, and finally take the expansion screw 200 out of the installation hole 230.

It can be seen from the above that, the present application not only can realize the detachment of the expansion screw 200, but also can not damage the expansion screw 200 in the process of detaching the expansion screw 200, and the expansion screw 200 can be reused, so that the utilization rate is high.

Referring to fig. 6, fig. 6 is a schematic diagram of a portion of the expansion tube 210 of fig. 4. In this embodiment, the expansion 212 is provided with an axially extending expansion slot 2121, and the end of the shaft 220 adjacent to the expansion 212 is provided with a tapered head 221, the tapered head 221 being adapted to expand the expansion 212 radially outwardly.

Specifically, when the lever body 220 is pulled out in a direction away from the mounting hole 230 by an external force, the tapered head 221 presses the expansion 212 to expand the expansion 212 radially outward. The expansion slots 2121 are arranged to enable the expansion part 212 to be stressed uniformly in the process of being pressed by the conical head 221, so that the expansion part 212 is prevented from being damaged.

In the present embodiment, as shown in fig. 4 and 5, the hooking portion 211 includes a through hole 2111 provided in the wall of the expansion pipe 210.

At this time, when the expansion screw 200 is removed, an external tool such as a hook or the like hooks the expansion pipe 210 through the through hole 21111, and the expansion pipe 210 is pulled out from the mounting hole 230.

In other application scenarios, the hooking portion 211 includes at least one of a groove, a blind hole, and a lifting lug disposed on the outer wall of the expansion pipe 210, and at this time, an external tool such as a lifting hook can still be used to hook the expansion pipe 210 through the groove, the blind hole, or the lifting lug, so as to pull the expansion pipe 210 out of the installation hole 230.

Meanwhile, in the present embodiment, in order to ensure that the expanded portion 212 can be attached to the inner wall of the mounting hole 230 in the expanded state when all of the expansion screws 200 are positioned in the mounting hole 230, the outer diameter of the hooking portion 211 is smaller than the outer diameter of the expanded portion 212 when it is not expanded.

Specifically, the inner diameter of the mounting hole 230 may be set to be equal to or slightly larger than the outer diameter of the expansion portion 212 when not expanded, so that when installing, the expansion screw 200 may be completely placed in the mounting hole 230, and then the rod body 220 is pulled out in a direction away from the mounting hole 230 by applying an external force to expand the expansion portion 212 to fit the inner wall of the mounting hole 230, thereby ensuring that the expansion tube 210 is clamped between the mounting hole 230 and the rod body 220. With reference to fig. 4, in the present embodiment, in order to ensure that the expansion tube 210 can be smoothly taken out of the installation hole 230, the outer wall of the portion of the rod 220 disposed inside the expansion tube 210 is smooth to reduce the friction between the rod 220 and the expansion tube 210, and the end of the rod 220 not provided with the tapered head 221 is further provided with a first external thread 222 for cooperating with a nut (not shown) to achieve the purpose of locking.

In this embodiment, the materials of the expansion tube 210 and the rod body 220 are both metals, such as copper, alloys, etc., but in other embodiments, the materials may be other materials, such as plastics, etc., without limitation.

As shown in fig. 6, in an application scenario of the first embodiment, in order to increase the shock resistance of the expansion screw 200, at least a portion of the outer wall of the expansion portion 212 is further provided with a second external thread 2122, so as to increase the friction between the expansion pipe 210 and the installation hole 230 when in the locked state, and reduce the loosening of the expansion pipe 210.

Meanwhile, the application also discloses a locking device which comprises an expansion screw, the expansion screw has the same structure as that of the expansion screw in the previous embodiment, and the detailed structure can be referred to the embodiment and is not repeated.

Wherein, the locking device can be any device which has the locking function and uses an expansion screw.

In summary, the expansion screw in the present application includes the hooking portion and the expansion portion arranged along the axial direction by arranging the expansion pipe, so that when the expansion pipe is in the non-expansion state, an external tool such as a hook can hook the expansion pipe through the hooking portion to pull the expansion pipe out of the mounting hole, thereby realizing the detachment of the expansion screw.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. An expansion screw, comprising:

the expansion pipe is axially arranged to be of a hollow structure and comprises a hook part and an expansion part which are axially arranged;

and the rod body is arranged in the expansion pipe in a penetrating mode and used for enabling the expansion part of the expansion pipe to expand outwards in the radial direction.

2. The expansion screw of claim 1,

the expansion part is provided with an expansion gap extending axially, and one end of the rod body, which is adjacent to the expansion part, is provided with a conical head part for enabling the expansion part to expand outwards along the radial direction.

3. The expansion screw of claim 1,

the hooking part comprises a groove, a blind hole or a lifting lug which is arranged on the outer wall of the expansion pipe.

4. The expansion screw of claim 1,

the hooking part comprises a through hole arranged on the pipe wall of the expansion pipe.

5. The expansion screw of claim 1,

the outer diameter of the hooking part is smaller than that of the expansion pipe when the expansion pipe is not expanded.

6. The expansion screw of claim 1,

the expansion pipe and the rod body are made of metal.

7. A locking device comprising an expansion screw, said expansion screw comprising:

the expansion pipe is axially arranged to be of a hollow structure and comprises a hook part and an expansion part which are axially arranged;

and the rod body is arranged in the expansion pipe in a penetrating mode and used for enabling the expansion part of the expansion pipe to expand outwards in the radial direction.

8. Locking device according to claim 7,

the expansion part is provided with an expansion gap extending axially, and one end of the rod body, which is adjacent to the expansion part, is provided with a conical head part for enabling the expansion part to expand outwards along the radial direction.

9. Locking device according to claim 7,

the hooking part comprises a groove, a blind hole or a lifting lug which is arranged on the outer wall of the expansion pipe.

10. Locking device according to claim 7,

the hooking part comprises a through hole arranged on the pipe wall of the expansion pipe.

Images