CN221257354U - Expansion pipe for screw - Google Patents

Abstract

The utility model discloses an expansion tube for a screw, which comprises a screw body, wherein the screw body is externally provided with an expansion tube, a plurality of hollowed-out strips are arranged on the expansion tube, outer clamping racks are arranged between each hollowed-out strip, a plurality of inner clamping racks are arranged on the inner side of the expansion tube, the positions of the inner clamping racks correspond to the positions of the outer clamping racks, and a bayonet is arranged at the end part of the inner side of the expansion tube; the utility model has simple structure and novel design, and ensures the fixing effect of the expansion screw.

Description

Expansion pipe for screw

Technical Field

The utility model relates to the technical field of expansion screws, in particular to an expansion tube for screws.

Background

The expansion screw is widely applied as an installation connecting part in daily construction, can be installed conveniently and rapidly, is firm, reliable, economical and applicable, is popular, has wide application range and huge consumption, is used for the later decoration links of the building, and is required to be perforated on the wall, inserted into an expansion pipe and enable the tail end of the expansion pipe to be expanded and fixed on the inner wall of a wall hole. In the chinese patent with publication number CN203146514U, a novel expansion screw is proposed, and stability between the expansion pipe and the screw body cannot be realized, and sliding can occur, so as to affect the fixing effect of the expansion screw.

Disclosure of Invention

The utility model aims to provide an expansion pipe for screws, which solves the problems in the prior art. In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an expand tube for screw, includes the screw body, the screw body outside is equipped with the expand tube, be equipped with a plurality of fretwork strips on the expand tube, every all be equipped with outer card rack between the fretwork strip, the inboard of expand tube is equipped with a plurality of inside callipers racks, the position of inside callipers rack and outer card rack is corresponding, the inboard tip of expand tube is equipped with the bayonet socket.

Preferably, the screw body comprises a nut and a screw rod, a flat washer is arranged on the screw rod, and a clamping groove is formed in the end portion of the screw rod.

Preferably, the tail end of the screw rod is provided with a screw tail, and the screw tail is in an inverted cone shape.

Compared with the prior art, the utility model has the beneficial effects that: the utility model has novel design, utilizes reasonable mechanical structure, ingeniously exerts the inherent potential of each element, and arranges the clamping racks inside and outside the expansion pipe, so that the expansion pipe and the wall body form high-strength friction force, and simultaneously, friction force can be formed between the expansion pipe and the screw body, thereby ensuring the fixing effect of the expansion pipe screw;

The inner side of the expansion pipe is provided with a bayonet, the screw is provided with a clamping groove, and the expansion pipe and the screw can be drilled into the wall body simultaneously when the expansion pipe screw is installed, so that the operation is convenient.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of the expansion pipe structure in the present utility model;

FIG. 3 is a cross-sectional view of an expanded pipe according to the present utility model;

Fig. 4 is a schematic view of a screw body structure according to the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides an expand tube for screw, includes screw body 1, screw body 1 includes nut 12 and screw rod 13, be equipped with plain washer 14 on the screw rod 13, plain washer 14 can play the cushioning effect between nut 12 and wall, the tip of screw rod 14 is equipped with draw-in groove 15, the end of screw rod 14 is equipped with tail screw 16, tail screw 16 is the back taper, tail screw 16 can be convenient for screw body 1 bore into in the wall.

The screw comprises a screw body 1, wherein an expansion pipe 2 is arranged outside the screw body 1, a plurality of hollow strips 21 are arranged on the expansion pipe 2, the hollow strips 21 can enable the expansion pipe 2 to rotate when compression occurs, outer clamping racks 22 are arranged between each hollow strip 21, a plurality of inner clamping racks 23 are arranged on the inner side of the expansion pipe 2, the positions of the inner clamping racks 23 correspond to the positions of the outer clamping racks 22, when the expansion pipe 2 is rotationally compressed, the inner clamping racks 23 and the outer clamping racks 22 synchronously rotate, the outer clamping racks 22 are clamped with a wall body, friction force is generated, stress is uniform, and the fixing effect of the expansion pipe screw is ensured; the inner clamping rack 23 is clamped with the screw rod 13, so that sliding does not occur between the expansion pipe 2 and the screw body 1, and the fixing effect of the expansion pipe screw is enhanced.

The end of the inner side of the expansion pipe 2 is provided with a bayonet 24, the bayonet 24 is clamped in the clamping groove 15, so that the screw body 1 and the expansion pipe 2 are integrated, synchronous drilling of the screw body 1 and the expansion pipe 2 is realized, the position of the expansion pipe 2 is fixed after drilling, continuous drilling is continued, the screw body 1 rotates in the expansion pipe 2, the expansion pipe 2 is driven to compress and rotate, the inner clamping rack 23 and the outer clamping rack 22 are respectively clamped, secondary disassembly is not needed, and then the screw body and the expansion pipe 2 are combined, so that the operation steps are saved, and the operation is convenient.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. The utility model provides an expand tube for screw, includes screw body (1), its characterized in that: the screw is characterized in that an expansion tube (2) is arranged outside the screw body (1), a plurality of hollow bars (21) are arranged on the expansion tube (2), outer clamping racks (22) are arranged between the hollow bars (21), a plurality of inner clamping racks (23) are arranged on the inner side of the expansion tube (2), the positions of the inner clamping racks (23) and the positions of the outer clamping racks (22) are corresponding, and bayonets (24) are arranged on the inner end of the expansion tube (2).

2. An expansion pipe for screws according to claim 1, wherein: the screw body (1) comprises a screw cap (12) and a screw rod (13), a flat washer (14) is arranged on the screw rod (13), and a clamping groove (15) is formed in the end portion of the screw rod (13).

3. An expansion pipe for screws according to claim 2, wherein: the tail end of the screw rod (13) is provided with a screw tail (16), and the screw tail (16) is in an inverted cone shape.