CN209908935U

CN209908935U - Expansion screw

Info

Publication number: CN209908935U
Application number: CN201920602580.XU
Authority: CN
Inventors: 彭国财
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-01-07
Anticipated expiration: 2029-04-30

Abstract

The utility model relates to an instrument and metal utensil technical field specifically are expansion screw, the lead screw comprises a screw rod, screw rod left end surface is provided with the external screw thread, the screw rod right-hand member is provided with the cone, the screw rod outside is provided with the expansion pipe, expansion pipe and screw rod threaded connection, the expansion pipe left side is provided with the nut with screw rod threaded connection, be provided with flat pad and spring washer between nut and the expansion pipe. The utility model discloses, through setting up the cone, can make the inflation screw hammer into the wall more easily and fix, reduced operating time, make work efficiency obtain promoting, through setting up flat the pad, can be pressure evenly distributed on connected part, make the device more stable, through setting up the elastic washer, can increase the early warning stress of inflation screw, prevent effectively that the nut is not hard up.

Description

Expansion screw

Technical Field

The utility model relates to an instrument and metal utensil technical field specifically are expansion screw.

Background

The expansion screw is generally a metal expansion screw, and the expansion screw is fixed by utilizing the wedge-shaped slope to promote expansion to generate friction bond force so as to achieve the fixing effect. One end of the screw is provided with threads, and the other end of the screw is provided with conicity. The outer surface of the wall is covered with an iron sheet, a half of the iron sheet cylinder is provided with a plurality of notches, the notches are plugged into a hole drilled on the wall together, then a nut is locked, the nut pulls a screw outwards to pull the taper into the iron sheet cylinder, the iron sheet cylinder is expanded and then is tightly fixed on the wall, and the wall is generally used for fastening protective guards, rain canopies, air conditioners and the like on materials such as cement, bricks and the like.

The existing expansion screw in the current market is a flat-head structure, but the flat-head structure is not beneficial to hammering the screw into a wall body, and great inconvenience is brought to operators in actual operation, so that the expansion screw is urgently needed to be developed aiming at the current situation so as to overcome the defects in the current actual application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an expansion screw to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an expansion screw, includes the screw rod, screw rod left end surface is provided with the external screw thread, the screw rod outside is provided with the expansion pipe, expansion pipe and screw rod threaded connection, the expansion pipe left side be provided with screw rod threaded connection's nut, be provided with flat pad and elastic washer between nut and the expansion pipe, the screw rod right-hand member is provided with cone, cone and screw rod integrated into one piece.

As a further aspect of the present invention: the screw, the screw cap, the expansion pipe and the conical head are all made of stainless steel materials.

As a further aspect of the present invention: and an expansion pipe wall crack is arranged on one side of the expansion pipe close to the conical head.

As a further aspect of the present invention: the maximum outer diameter of the conical head is larger than the inner diameter of the expansion pipe.

As a further aspect of the present invention: the outer ring of the nut is of a hexagonal structure, and the inner ring of the nut is of a circular structure.

Compared with the prior art, the beneficial effects of the utility model are that:

1. by arranging the conical head, the expansion screw can be more easily hammered into the wall for fixing, the operation time is reduced, and the working efficiency is improved;

2. through setting up the flat pad, can be pressure evenly distributed on the part of being connected, make the device more stable, through setting up the elastic washer, can increase the early warning stress of inflation screw, prevent effectively that the nut is not hard up.

Drawings

Fig. 1 is a schematic structural view of an expansion screw.

Fig. 2 is a schematic structural view of a screw rod in the expansion screw.

In the figure: 1-screw, 2-nut, 3-flat pad, 4-elastic washer, 5-expansion tube, 6-conical head, 7-expansion tube wall crack and 8-external thread.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Example 1

Referring to fig. 1-2, in the embodiment of the present invention, an expansion screw includes a screw rod 1, an external thread 8 is disposed on a left end surface of the screw rod 1, an expansion pipe 5 is disposed on an outer side of the screw rod 1, the expansion pipe 5 is in threaded connection with the screw rod 1, a nut 2 in threaded connection with the screw rod 1 is disposed on a left side of the expansion pipe 5, a flat gasket 3 and an elastic gasket 4 are disposed between the nut 2 and the expansion pipe 5, a conical head 6 is disposed on a right end of the screw rod 1, the conical head 6 and the screw rod 1 are integrally formed, the expansion screw can be more easily hammered into a wall for fixing by disposing the conical head 6, operation time is reduced, working efficiency is improved, pressure can be uniformly distributed on connected parts by disposing the flat gasket 3, the device is more stable, early warning stress of the expansion screw can be increased by disposing the elastic gasket 4, effectively preventing the nut 2 from loosening.

In this embodiment, the screw 1, the nut 2, the expansion tube 5 and the conical head 6 are all made of stainless steel.

In this embodiment, an expansion pipe wall crack 7 is arranged on one side of the expansion pipe 5 close to the conical head 6.

In this embodiment, the maximum outer diameter of the conical head 6 is larger than the inner diameter of the expansion pipe 5.

In this embodiment, the outer ring of the nut 2 is a hexagonal structure, and the inner ring is a circular structure.

Example 2

A metal appliance comprising the expansion screw of embodiment 1.

This inflation screw through setting up cone 6, can make the inflation screw hammer into the wall more easily and fix, has reduced operating time, makes work efficiency obtain promoting, through setting up flat pad 3, can make the device more stable to pressure evenly distributed on the part that is connected, through setting up elastic gasket 4, can increase the early warning stress of inflation screw, prevents effectively that nut 2 is not hard up.

The utility model discloses a theory of operation is: the conical head 6 is aligned with the wall, the conical head 6 is hammered into the wall by hammering the screw 1, then the screw cap 2 is screwed, the screw 1 is pulled outwards by the screw cap 2, the conical head 6 is abutted with the expansion pipe 5, and the expansion pipe 5 is expanded because the inner diameter of the expansion pipe 5 is smaller than the outer diameter of the conical head 6, so that the expansion pipe 5 is tightly fixed on the wall.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides an expansion screw, includes screw rod (1), its characterized in that, screw rod (1) left end surface is provided with external screw thread (8), the screw rod (1) outside is provided with expansion pipe (5), expansion pipe (5) and screw rod (1) threaded connection, expansion pipe (5) left side is provided with nut (2) with screw rod (1) threaded connection, be provided with between nut (2) and expansion pipe (5) flat pad (3) and elastic washer (4), screw rod (1) right-hand member is provided with conical head (6), conical head (6) and screw rod (1) integrated into one piece.

2. Expansion screw according to claim 1, characterized in that the screw (1), the nut (2), the expansion tube (5) and the conical head (6) are made of stainless steel.

3. Expansion screw according to claim 1, characterized in that the expansion tube (5) is provided with an expansion tube wall slit (7) on the side close to the conical head (6).

4. Expansion screw according to claim 2, characterized in that the maximum outer diameter of the conical head (6) is larger than the inner diameter of the expansion tube (5).

5. Expansion screw according to claim 4, characterized in that the outer ring of the nut (2) is of hexagonal configuration and the inner ring is of circular configuration.