CN220268145U - Reverse spiral expansion screw sleeve - Google Patents

Abstract

The utility model discloses a reverse spiral expansion screw sleeve which is suitable for materials such as concrete solid walls, gypsum boards, hollow bricks and the like, and comprises a sleeve body, wherein one end of the sleeve body is connected with an end plate, the other end of the sleeve body is connected with an end head, and a cylinder body of the sleeve body is provided with a reverse spiral, a latch, an auxiliary convex plate and an inclined groove; the clamping teeth are uniformly distributed on two sides of one end of the sleeve body close to the end plate and extend to one third of the sleeve body; the reverse spiral comprises a straight line segment, a spiral segment and a wave line segment; the reverse spiral and the latch form a double-layer reinforcing structure. The reverse spiral is arranged outside the sleeve body, so that the sleeve body is easy to extend into a fixed object, the use is convenient, and the reverse spiral and the clamping teeth form a double-layer reinforcing structure, so that the sleeve body can be more firmly arranged in a wall and is not easy to fall off; meanwhile, due to the design of the reverse spiral and the inclined grooves, the expansion screw sleeve can be fully deformed, the expansion effect of the expansion screw sleeve is improved, and loosening of the expansion screw sleeve is effectively avoided.

Description

Reverse spiral expansion screw sleeve

Technical Field

The utility model relates to the technical field of fasteners, in particular to a reverse spiral expansion screw sleeve.

Background

The expansion screw often comprises an expansion screw sleeve and a screw, and the structure of the expansion screw sleeve can influence the fixing effect of the expansion screw to a great extent. The existing expansion screw sleeve is simple in structure, the fixing effect after use is not ideal enough, and the requirements of people cannot be met well.

Disclosure of Invention

The utility model aims to provide a reverse spiral expansion screw sleeve, which can be more firmly arranged in a wall through a reverse spiral expansion structure so as to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the reverse spiral expansion screw sleeve comprises a sleeve body, wherein one end of the sleeve body is connected with an end plate, the other end of the sleeve body is connected with an end head, a cavity is formed in the end head, the end plate and the sleeve body in a penetrating manner, and a reverse spiral, a latch, an auxiliary convex plate and an inclined groove are formed in the sleeve body of the sleeve body; the clamping teeth are uniformly distributed on two sides of one end of the sleeve body, which is close to the end plate, and extend to one third of the sleeve body; the auxiliary convex plate and the latch form an included angle of 90 degrees, and the included angle is distributed on the upper edge of one end, close to the end plate, of the sleeve body; the reverse spiral comprises a straight line segment, a spiral segment and a wave line segment; the straight line segments are distributed between the clamping teeth on two sides of the sleeve body; the spiral sections are reversely and spirally distributed in the middle of the sleeve body, and the spiral sections bear straight line sections and wavy line sections; the wave line segments are distributed on one side of the sleeve body close to the end head and extend to the bottoms of the sleeve body and the end head; the oblique grooves are positioned on two sides of the wavy line section and are arranged at one third of the bottom of the sleeve body.

Preferably, the straight line section and the auxiliary convex plate are on the same central line, and the lower edge of the straight line section is equal to the latch.

Preferably, the wavy line section, the straight line section and the auxiliary convex plate are on the same central line, and the wavy line section is equal to the oblique groove in length on the sleeve body.

Preferably, the reverse spiral and the latch form a double-layer reinforcing structure.

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

the reverse spiral expansion screw sleeve is suitable for materials such as concrete solid walls, gypsum boards, hollow bricks and the like, the end head is arranged at the end part of the sleeve body, and the reverse spiral is arranged outside the sleeve body, so that the sleeve body easily stretches into the fixed object, the use is convenient, and the reverse spiral and the clamping teeth form a double-layer reinforcing structure, so that the sleeve body is more firm and is not easy to fall off in the wall; meanwhile, due to the design of the reverse spiral and the inclined grooves, the expansion screw sleeve can be fully deformed, the expansion effect of the expansion screw sleeve is improved, the expansion screw sleeve and the screw are fixed more firmly after being matched, and loosening of the expansion screw sleeve is effectively avoided.

Drawings

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

FIG. 2 is a front view of the present utility model;

fig. 3 is a top view of the present utility model.

In the figure: 1. a sleeve body; 2. an end plate; 3. an end head; 4. a cavity; 5. reverse spiral; 501. a straight line segment; 502. a helical section; 503. a wave line segment; 6. latch teeth; 7. an auxiliary convex plate; 8. and (5) an oblique groove.

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. 1-3, a reverse spiral expansion screw sleeve in this embodiment includes a sleeve body 1, one end of the sleeve body 1 is connected with an end plate 2, the other end is connected with an end head 3, a cavity 4 is penetrated inside the end head 3, the end plate 2 and the sleeve body 1, and a reverse spiral 5, a latch 6, an auxiliary convex plate 7 and an inclined groove 8 are arranged at the barrel body of the sleeve body 1; the clamping teeth 6 are uniformly distributed on two sides of one end of the sleeve body 1, which is close to the end plate 2, and extend to one third of the sleeve body 1; the auxiliary convex plate 7 and the latch 6 form an included angle of 90 degrees, and are distributed on the upper edge of one end, close to the end plate 2, of the sleeve body 1; the reverse spiral 5 and the latch 6 form a double-layer reinforcing structure, and the reverse spiral 5 comprises a straight line segment 501, a spiral segment 502 and a wavy line segment 503; the straight line segments 501 are distributed among the latches 6 at two sides of the sleeve body 1, the straight line segments 501 and the auxiliary convex plates 7 are arranged on the same central line, and the lower edges of the straight line segments 501 are equal in length to the latches 6; the spiral section 502 is distributed in the middle of the sleeve body 1 in a reverse spiral shape, and the spiral section 502 receives the straight line section 501 and the wave line section 503; the wavy line sections 503 are distributed on one side of the sleeve body 1 close to the end head 3 and extend to the bottoms of the sleeve body 1 and the end head 3, the wavy line sections 503, the straight line sections 501 and the auxiliary convex plates 7 are on the same central line, and the wavy line sections 503 are equal to the inclined grooves 8 in length on the sleeve body 1; the oblique grooves 8 are positioned on two sides of the wavy line section 503 and are arranged at one third of the bottom of the sleeve body 1.

To sum up: the reverse spiral expansion screw sleeve is suitable for materials such as concrete solid walls, gypsum boards, hollow bricks and the like, the end head 3 is arranged at the end part of the sleeve body 1, and the reverse spiral 5 is arranged outside the sleeve body 1, so that the sleeve body 1 easily stretches into a fixed object, the use is convenient, and the reverse spiral 5 and the clamping teeth 6 form a double-layer reinforcing structure, so that the sleeve body is more firm and is not easy to fall in the wall; meanwhile, due to the design of the reverse screw 5 and the inclined groove 8, the expansion screw sleeve can be fully deformed, the expansion effect of the expansion screw sleeve is improved, the expansion screw sleeve and the screw are fixed more firmly after being matched, and loosening of the expansion screw sleeve is effectively avoided.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 (4)

1. The utility model provides a reverse spiral inflation screw sleeve, includes the cover body (1), end plate (2) are connected to the one end of the cover body (1), and end (3) are connected to the other end, link up cavity (4) in the inside of end (3), end plate (2) and the cover body (1), its characterized in that: a reverse spiral (5), a latch (6), an auxiliary convex plate (7) and an inclined groove (8) are arranged at the barrel body of the sleeve body (1); the clamping teeth (6) are uniformly distributed on two sides of one end, close to the end plate (2), of the sleeve body (1) and extend to one third of the sleeve body (1); the auxiliary convex plate (7) and the latch (6) form an included angle of 90 degrees, and the included angle is distributed on the upper edge of one end, close to the end plate (2), of the sleeve body (1); the reverse spiral (5) comprises a straight line segment (501), a spiral segment (502) and a wave line segment (503); the straight line segments (501) are distributed between the clamping teeth (6) at two sides of the sleeve body (1); the spiral sections (502) are distributed in the middle of the sleeve body (1) in a reverse spiral mode, and the spiral sections (502) bear the straight line sections (501) and the wave line sections (503); the wave line segments (503) are distributed on one side of the sleeve body (1) close to the end head (3) and extend to the bottoms of the sleeve body (1) and the end head (3); the oblique grooves (8) are positioned on two sides of the wavy line section (503) and are arranged at one third of the bottom of the sleeve body (1).

2. A reverse spiral expansion screw cap according to claim 1, wherein: the straight line section (501) and the auxiliary convex plate (7) are arranged on the same central line, and the lower edge of the straight line section (501) is equal to the latch (6).

3. A reverse spiral expansion screw cap according to claim 1, wherein: the wavy line section (503) is on the same central line with the straight line section (501) and the auxiliary convex plate (7), and the wavy line section (503) is equal to the inclined groove (8) in length on the sleeve body (1).

4. A reverse spiral expansion screw cap according to claim 1, wherein: the reverse spiral (5) and the latch (6) form a double-layer reinforcing structure.