CN221003439U - Parallel internal expansion type expansion pipe - Google Patents

Abstract

The utility model provides a parallel internal expansion type expansion pipe, and belongs to the technical field of fasteners. The wall surface expansion pipe solves the problems that after an expansion pipe in the prior art is nailed into a wall surface, the tail end of the expansion pipe is in a hollow state, and the strength is weak; and the wall is difficult to be taken out from the wall surface when being dismantled. The parallel internal expansion type expansion pipe comprises an expansion pipe head, an expansion pipe barrel, an expansion block and a gasket, wherein a screw matched with the expansion pipe penetrates through the gasket and the expansion pipe head, the expansion block is screwed into the expansion pipe barrel to expand the inside of the expansion pipe barrel, and slides along a sliding groove towards the direction of the expansion pipe head after being subjected to outward pressure, so that a clamping block on the expansion block slides into a cavity below a clamping groove to abut against the inner wall of the expansion pipe head, and at the moment, the outer surface of the expansion block protrudes out of the outer surface of the expansion pipe barrel to achieve the effect of parallel internal expansion type fastening. The utility model has the advantages of good expansion effect, strong fastening force, convenient installation and disassembly and secondary utilization.

Description

Parallel internal expansion type expansion pipe

Technical Field

The utility model belongs to the technical field of fasteners, and particularly relates to a parallel internal expansion pipe.

Background

The expansion pipe is also called an expansion screw, which is used for fastening various middle and small hanging parts, and the working principle is that a hole with the same size as the expansion pipe is drilled on the wall surface by using a percussion drill, then the expansion pipe is driven in, and the matched screw is screwed into the pipe, so that the pipe barrel is thickened and firmly embedded in the hole, and the screw cannot loosen and fall off, thereby firmly hanging and installing objects.

Most of expansion pipes in the prior art are conical, after the expansion pipes are nailed into a wall surface, the tail ends of the expansion pipes are in a hollow state, the strength is weak, and after an object mounted on the expansion pipes is removed, the expansion pipes are difficult to take out from the wall surface, and the wall surface is damaged greatly after the expansion pipes are taken out.

Disclosure of utility model

The present utility model aims to solve the above-mentioned problems occurring in the prior art and to provide a parallel inner expansion pipe.

The aim of the utility model can be achieved by the following technical scheme: the parallel internal expansion type expansion pipe comprises an expansion pipe head, an expansion pipe barrel, an expansion block and a gasket, wherein the expansion pipe head and the expansion pipe barrel are integrally formed, and a plurality of clamping grooves are uniformly formed in the expansion pipe head along the edge of the expansion pipe barrel outwards;

The expansion pipe is characterized in that a pipe screw hole is formed in the center of the expansion pipe, a plurality of pipe grooves are uniformly formed in the expansion pipe outwards through the pipe screw hole, the pipe grooves correspond to the clamping grooves in position, groove inclined planes are formed in the pipe grooves, and the groove inclined planes incline gradually in the direction away from the expansion pipe head;

The expansion block is matched with the groove of the pipe barrel, the outer surface of the expansion block is flush with the outer surface of the expansion pipe barrel in an original state, the inclined surface of the groove is attached to the inclined surface of the expansion block, and a clamping block corresponding to the clamping groove is formed at the tail end of the expansion block; the gasket is arranged at the bottom of the expansion pipe head, a cavity is formed between the gasket and the expansion pipe barrel, and a gasket screw hole which is coaxially arranged with the pipe barrel screw hole is formed in the center of the gasket.

In the parallel internal expansion pipe, sliding grooves are formed on two sides of the groove inclined surface of the pipe barrel groove.

In the parallel internal expansion pipe, sliding blocks corresponding to the sliding grooves are formed on two sides of the inclined surface of the expansion block.

In the parallel internal expansion pipe, the gasket is uniformly provided with a plurality of fixing holes, and the positions of the fixing holes correspond to the positions of the clamping blocks.

In the above-mentioned parallel internal expansion pipe, the number of the expansion blocks, the tube grooves and the clamping grooves is three, and the positions of the expansion blocks, the tube grooves and the clamping grooves are mutually corresponding.

Compared with the prior art, the parallel internal expansion type expansion pipe provided by the utility model has the advantages that the internal expansion is realized by screwing the screw in, the expansion block slides along the sliding groove towards the direction of the expansion pipe head after being subjected to outward force, so that the expansion block is expanded outwards to play a fastening role, the parallel internal expansion is realized, and the influence on the connection strength caused by more hollow holes in the hole is avoided; when the expansion pipe is in an expansion state, the clamping blocks slide into the cavity below the clamping grooves to prop against the inner wall of the expansion pipe head, so that the expansion pipe has a fixing effect, after the internal screw is removed, the clamping blocks can be matched with the clamping grooves again to shrink the expansion pipe, the expansion pipe can be conveniently removed from the wall surface, and the expansion pipe can be reused.

Drawings

FIG. 1 is a schematic view of the structure of the present parallel inner expansion pipe in its original state;

FIG. 2 is a schematic view of the structure of the present parallel inner expansion pipe in an expanded state;

FIG. 3 is an exploded view of the structure of the present parallel inner expansion tube;

Figure 4 is a schematic cross-sectional view of the present parallel inner expanding tube.

In the above figures, 100, the inflation tube head; 110. a clamping groove; 120. a cavity; 200. expanding the tube; 210. a barrel screw hole; 220. a tube recess; 221. groove inclined planes; 222. a chute; 300. an expansion block; 310. an expansion block inclined plane; 320. a sliding block; 330. a clamping block; 400. a gasket; 410. a gasket screw hole; 420. and a fixing hole.

Description of the embodiments

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 to 4, the parallel inner expansion tube comprises an expansion tube head 100, an expansion tube barrel 200, an expansion block 300 and a gasket 400, wherein the expansion tube head 100 and the expansion tube barrel 200 are integrally formed, and the diameter of the expansion tube head 100 is larger than that of the expansion tube barrel 200. The side of the expansion tube head 100 is defined as the lower end and the side of the expansion tube 200 is defined as the upper end.

As shown in fig. 3 to 4, the expansion pipe head 100 is uniformly provided with a plurality of clamping grooves 110 on a surface of one side facing the expansion pipe barrel 200, and the clamping grooves 110 are distributed in an annular shape outwards along the joint of the bottom of the expansion pipe barrel 200 and the expansion pipe head 100.

The expansion tube 200 is provided with a tube screw hole 210 in the center, the tube screw hole 210 is provided with a plurality of tube grooves 220 on the expansion tube 200 outwards, the tube grooves 220 correspond to the clamping grooves 110, the tube grooves 220 are provided with groove inclined planes 221, the groove inclined planes 221 incline gradually towards the direction away from the expansion tube head 100, namely, the distance between the groove inclined planes 221 and the central axis of the expansion tube 200 increases gradually from top to bottom and is far away until the expansion tube is immersed into the corresponding clamping grooves 110.

The expansion block 300 is matched with the tube groove 220, and in the original state, the outer surface of the expansion block 300 is flush with the outer surface of the expansion tube 200, an expansion block inclined surface 310 is formed on the expansion block 300, the groove inclined surface 221 is arranged in a manner of being attached to the expansion block inclined surface 310, a clamping block 330 protruding outwards is formed at the tail end of the bottom of the expansion block 300, and the clamping block 330 is correspondingly matched with the clamping groove 110 on the expansion tube head 100.

The gasket 400 is arranged at the bottom of the expansion pipe head 100, the bottom of the expansion pipe head 100 is of a concave structure, the inner diameter of a groove of the gasket 400 is equal to the diameter of the gasket 400, a gasket screw hole 410 which is coaxially arranged with the pipe screw hole 210 is arranged at the center of the gasket 400, when the screw nail which is correspondingly matched with the expansion pipe is arranged, the gasket is screwed in from the gasket screw hole 410 and then screwed into the pipe screw hole 210, and a cavity 120 is formed between the upper surface of the gasket 400 and the lower surface of the expansion pipe 200. The spacer 400 serves as a protective buffer when the screw is screwed in.

To further illustrate, two sliding grooves 222 are formed on the expansion tube 200 at both sides of the groove slope 221 of the tube groove 220, and sliding blocks 320 corresponding to the sliding grooves 222 are formed at both sides of the expansion block slope 310 of the expansion block 300. The sliding block 320 can move up and down along the inclined plane direction in the sliding groove 222, and the expansion and contraction of the expansion block 300 are adjusted, so that the parallel internal expansion of the expansion pipe is realized, and the influence on the connection strength of the expansion pipe due to more hollow holes after installation is avoided.

Further, the gasket 400 is uniformly provided with a plurality of fixing holes 420, the positions of the fixing holes 420 correspond to the positions of the clamping blocks 330, the bottom of the clamping block 330 is provided with a mounting opening, and when the expansion block 300 sinks, the expansion block 300 can be limited and fixed through the fixing holes 420 on the gasket 400, so that the fastening force and the structural strength of the expansion block 300 are increased.

Further, the number of the expansion blocks 300, the tube grooves 220, the clamping grooves 110 and the fixing holes 420 is three, the positions of the expansion blocks are corresponding to each other, the triangular structure has good firm stability, but the number of the expansion blocks is not limited to three, and the connection strength and the machining precision of the expansion tubes are ensured.

The working principle of the utility model is as follows: as shown in fig. 1, in the original unused state of the expansion tube, the expansion block 300 is embedded in the tube groove 220, the outer surface of the expansion block 300 is flush with the outer surface of the expansion tube 200, and the clamping block 330 is matched with the clamping groove 110.

The wall surface is perforated with a hole with the same size as the expansion pipe, the expansion pipe in the original state is nailed into the hole, the expansion pipe head 100 faces outwards, the expansion pipe barrel 200 is arranged in the hole, the screw matched with the expansion pipe is screwed in from the expansion pipe head 100 to expand the inside of the expansion pipe head, and the expansion block 300 automatically slides along the sliding groove 222 towards the expansion pipe head 100 after being subjected to outward pressure.

As shown in fig. 2, in the expansion tube in the expanded state, the expansion block 300 is sunk, the outer surface of the expansion block protrudes out of the outer surface of the expansion tube barrel 200, so that a parallel internal expansion fastening screw is realized, at this time, the clamping block 330 slides into the cavity 120 below the clamping groove 110 to abut against the inner wall of the expansion tube head 100 to play a role in fixing, the expansion effect is good, and the fastening force is strong.

If the expansion pipe needs to be removed, after the internal screw is removed, the clamping block 330 is not under the action of pressure, and can be matched with the clamping groove 110 again to shrink the expansion pipe to restore to the original state, so that the expansion pipe is convenient to remove from the wall surface, and if the expansion pipe is not damaged, the expansion pipe can be reused for the second time.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although various terms are used more herein, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims (5)

1. The parallel internal expansion type expansion pipe comprises an expansion pipe head (100), an expansion pipe barrel (200), an expansion block (300) and a gasket (400), and is characterized in that the expansion pipe head (100) and the expansion pipe barrel (200) are integrally formed, and a plurality of clamping grooves (110) are uniformly formed in the expansion pipe head (100) along the edge of the expansion pipe barrel (200) outwards; the expansion pipe comprises an expansion pipe body (200), and is characterized in that a pipe body screw hole (210) is formed in the center of the expansion pipe body (200), a plurality of pipe body grooves (220) are uniformly formed in the pipe body screw hole (210) outwards on the expansion pipe body (200), the pipe body grooves (220) correspond to the clamping grooves (110), groove inclined planes (221) are formed in the pipe body grooves (220), and the groove inclined planes (221) incline gradually towards a direction far away from the expansion pipe head (100);

The expansion block (300) is matched with the pipe barrel groove (220), the outer surface of the expansion block (300) is flush with the outer surface of the expansion pipe barrel (200) in an original state, the groove inclined surface (221) is attached to the expansion block inclined surface (310), and a clamping block (330) corresponding to the clamping groove (110) is formed at the tail end of the expansion block (300); the gasket (400) is arranged at the bottom of the expansion pipe head (100), a cavity (120) is formed between the gasket and the expansion pipe barrel (200), and a gasket screw hole (410) which is coaxially arranged with the pipe barrel screw hole (210) is formed in the center of the gasket (400).

2. A parallel inner expansion pipe according to claim 1, characterized in that the grooves (222) are formed on both sides of the groove slope (221) of the pipe barrel groove (220).

3. A parallel inner expansion pipe according to claim 2, characterized in that sliding blocks (320) corresponding to the sliding grooves (222) are formed on both sides of the expansion block inclined plane (310).

4. The parallel inner expanding pipe according to claim 1, wherein the gasket (400) is uniformly provided with a plurality of fixing holes (420), and the positions of the fixing holes (420) correspond to the positions of the clamping blocks (330).

5. A parallel inner expanding tube according to claim 1, characterised in that the number of expansion blocks (300), tube recesses (220) and clamping grooves (110) is three and the positions correspond to each other.