CN220816190U - Expansion screw with high stability - Google Patents

Abstract

The utility model discloses an expansion screw with high stability, which relates to the technical field of expansion screws, and comprises a screw rod, a limiting block fixed at one end of the screw rod, an expansion pipe arranged outside the screw rod, and a convex plate welded on the surface of the expansion pipe and in the same direction with the central axis of the expansion pipe; the expansion pipe comprises a cylinder part in threaded connection with the screw rod, and an expansion part which is communicated with the cylinder part and can be expanded outwards under the action of the screw rod. The bolt provided by the utility model is completely different from the bolt in the prior art in structure, and is simple in structure and convenient to use. The screw is screwed into the expansion pipe to realize the connection of the bolt and the expansion pipe, and when the screw is screwed into the expansion part at the rear end of the expansion pipe, the expansion blade is extruded to expand outwards to extrude the wall or the ground, so that the fixed connection with the wall or the ground is realized. The convex plates are arranged outside the expansion pipes, so that the expansion pipes are prevented from rotating and slipping in the wall or the ground when the screw rods are rotated.

Description

Expansion screw with high stability

Technical Field

The utility model relates to the technical field of expansion screws, in particular to an expansion screw with high stability.

Background

The expansion screw is a special threaded connector for fixing pipeline support/hanging/bracket or equipment on wall, floor and column, usually one end of the screw is threaded, one end is tapered, an iron sheet expansion tube is covered outside, one end of the screw is provided with a nut, one half of the iron sheet expansion tube is provided with a plurality of notches, in the use process, a hole with corresponding size is drilled on a fixed body by an electric drill, then the bolt and the expansion tube are plugged into the hole, one end of the expansion tube provided with the notch is arranged in the hole, and the bolt expansion tube and the fixed body are expanded into a whole by screwing the nut, so that the bolt is fixed on the fixed body. However, in the using process of the bolt, the nut rotates on the bolt, so that the iron sheet expansion tube expands when the bolt moves, slipping is easy to occur, and the iron sheet expansion tube synchronously rotates along with the bolt; under some special working conditions, the friction force of the bolt is reduced under the action of the reciprocating force, and the bolt is easy to fall off.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provide the expansion screw which has a simple structure and high stability and can be recycled.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

The expansion screw with high stability comprises a screw rod, a limiting block fixed at one end of the screw rod, an expansion pipe arranged outside the screw rod, and a convex plate welded on the surface of the expansion pipe and in the same direction with the central axis of the expansion pipe; the expansion pipe comprises a cylinder part in threaded connection with the screw rod, and an expansion part which is communicated with the cylinder part and can be expanded outwards under the action of the screw rod.

Further, the limiting block is in a hexagonal nut shape.

Further, one end of the screw, which is not provided with the limiting block, is conical.

Further, the expansion part is composed of a plurality of expansion leaves, and the expansion leaves are integrally formed into a cylinder shape when not expanded; and internal threads matched with the threads on the screw rods are arranged in the expansion blades.

Further, the expansion leaves are 4 pieces.

Further, each expansion blade is correspondingly provided with a convex plate.

Further, the convex plate is in a sawtooth shape.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The bolt provided by the utility model is completely different from the bolt structure in the prior art, the internal threads are arranged in the expansion pipe, the bolt and the expansion pipe are connected by screwing the screw rod, when the screw rod is screwed into the rear end expansion part of the expansion pipe, the expansion blade is extruded to expand outwards to extrude the wall body or the ground, and the fixed connection with the wall body or the ground is realized.

(2) The utility model also provides a convex plate outside the expansion pipe, and the convex plate cuts into the wall or the ground in the expansion process of the expansion pipe, so that the position of the expansion pipe is fixed, and the expansion pipe is prevented from rotating and slipping in the wall or the ground when the screw rod is rotated.

(3) The utility model has simple structure, realizes the fixation of the expansion screw by rotating the screw rod, and can realize the recycling of the expansion screw by reversely rotating the screw rod to unscrew the screw rod after the expansion screw rod is used.

Drawings

FIG. 1 is a view showing a structure of a screw rod in the present utility model;

FIG. 2 is a diagram of the overall structure of the present utility model;

FIG. 3 is a cross-sectional view of the present utility model;

fig. 4 is a cross-sectional view of the expanded utility model.

Wherein, the names corresponding to the reference numerals are: the device comprises a screw rod 1, a limiting block 2, an expansion pipe 3, a cylinder part 4, an expansion part 5 and a convex plate 6.

Detailed Description

The utility model will be further illustrated by the following description and examples, which include but are not limited to the following examples.

As shown in fig. 1-2, this embodiment provides an expansion screw with high stability, including screw 1, the end of screw 1 is the toper, and the front end of screw 1 is fixed and is provided with stopper 2, and this stopper 2 is hexagon nut form, in the use, makes things convenient for the spanner to act on this stopper 2 and rotate. The expansion pipe 3 is arranged outside the screw 1, the expansion pipe 3 comprises a front end cylinder part 4 and a rear end expansion part 5 which are in threaded connection with the screw 1, the expansion part 5 is communicated with the cylinder part 4, the expansion part 5 consists of a plurality of expansion leaves, such as 1, 2, 3, 4 or more expansion leaves, as shown in fig. 3 (cross section), 4 expansion leaves are selected in the embodiment, the 4 expansion leaves are cylindrical when not expanded, the screw 1 enters the expansion part 5 along with the inward rotation of the screw 1, the expansion leaves are extruded to expand the expansion leaves to the periphery (as shown in fig. 4), friction with a wall body or the ground is further increased, and the fixation of the expansion screw is realized. In this embodiment, in order to increase the pulling force of the screw 1 and the expansion pipe 3, an internal thread matching with the thread on the screw 1 is provided inside each expansion blade.

In order to prevent slippage of the expansion pipe 3 during rotation of the screw 1, a plurality of convex plates 6 are welded to the surface of the expansion pipe 3, and preferably, the convex plates 6 are welded in the same direction as the central axis of the expansion pipe 3, and a plurality of convex plates 6 are provided, one convex plate 6 is welded to each expansion blade.

Through the test comparison to the expansion screw that this embodiment provided and the expansion screw among the prior art, the expansion coefficient of the expansion screw that this embodiment provided is than current expansion screw increase one time, and the expansion screw that this embodiment provided can be used to concrete wall and brick face, after beating wall or brick face the inside, can not displacement skid.

Example 2

On the basis of the embodiment 1, the convex plate 6 is serrated in order to further increase the friction force between the expansion pipe 3 and the wall or the ground.

The bolt provided by the utility model is completely different from the bolt in the prior art in structure, and is simple in structure and convenient to use. The inside of the expansion pipe is provided with internal threads, the screw is screwed into the expansion pipe to realize the connection of the bolt and the expansion pipe, and when the screw is screwed into the expansion part at the rear end of the expansion pipe, the expansion blades are extruded to expand outwards to extrude the wall or the ground, so that the fixed connection with the wall or the ground is realized. The convex plates are arranged outside the expansion pipes, so that the expansion pipes are prevented from rotating and slipping in the wall or the ground when the screw rods are rotated.

The above embodiment is only one of the preferred embodiments of the present utility model, and should not be used to limit the scope of the present utility model, but all the insubstantial modifications or color changes made in the main design concept and spirit of the present utility model are still consistent with the present utility model, and all the technical problems to be solved are included in the scope of the present utility model.

Claims (7)

1. The expansion screw with high stability comprises a screw rod (1) and is characterized by further comprising a limiting block (2) fixed at one end of the screw rod, an expansion pipe (3) arranged outside the screw rod (1), and a convex plate (6) welded on the surface of the expansion pipe (3) and in the same direction with the central axis of the expansion pipe (3); the expansion pipe (3) comprises a cylinder part (4) in threaded connection with the screw (1), and an expansion part (5) which is communicated with the cylinder part (4) and can be expanded outwards under the action of the screw (1).

2. The high-stability expansion screw according to claim 1, characterized in that the limit block (2) is in the shape of a hexagonal nut.

3. The expansion screw with high stability according to claim 1, wherein one end of the screw rod (1) where the limiting block (2) is not arranged is conical.

4. A high stability expansion screw according to claim 1, 2 or 3, wherein said expansion part (5) is composed of a plurality of expansion leaves, and wherein said expansion leaves are integrally formed into a cylindrical shape when not expanded; the inside of the expansion leaves is provided with internal threads which are matched with the threads on the screw rod (1).

5. The high stability expansion screw of claim 4, wherein said expansion leaves are 4 pieces.

6. A high stability expansion screw according to claim 4, characterized in that each expansion leaf is provided with a corresponding plate (6).

7. A high stability expansion screw according to claim 6, characterized in that the boss (6) is serrated.