CN216199639U

CN216199639U - Self undercut anchor

Info

Publication number: CN216199639U
Application number: CN202122699492.6U
Authority: CN
Inventors: 郑礼其
Original assignee: Individual
Current assignee: Handan Essence Metal Products Co.,Ltd.
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-04-05
Anticipated expiration: 2031-11-05

Abstract

The utility model discloses a self-undercut anchor bolt, which belongs to the technical field of fasteners and comprises a screw rod and an expansion piece, wherein the expansion piece is sleeved on the screw rod and is positioned by a gasket and a nut which are arranged on the screw rod; and anti-skid grooves are formed in the two end faces of the gasket. The expansion sheet has the advantages of good expansion and rebound resilience, high reuse rate, good fastening effect, capability of firmly penetrating into a wall body, high use safety and suitability for all anchor bolts.

Description

Self undercut anchor

Technical Field

The utility model belongs to the technical field of fasteners, and relates to an anchor bolt, in particular to a self-undercut anchor bolt.

Background

When the self-undercut anchor bolt is installed, an expansion anchor head needs to be used for forming a hole, and when the bolt is screwed down, the expansion piece expands and is fixed in the hole. The self-undercut anchor bolt in the prior art has the following disadvantages: 1) when the expansion sheet is expanded, the end face is blunt, so that the expansion sheet is difficult to penetrate into a wall body, and the expansion sheet is not deep enough into the wall body, so that the fastening effect is poor; 2) when the expansion piece is used in temporary engineering and is disassembled, the expansion piece has poor resilience, and after repeated use, the rebound effect is obviously reduced, so that the fastening requirement cannot be met; 3) in the engineering with stronger vibration, the nut on the bolt is easy to loosen, and larger potential safety hazard exists.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the utility model aims to provide the self-undercut anchor bolt so as to achieve the purposes of good repeated use effect, good fastening effect and difficult loosening.

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

a self-undercut anchor bolt comprises a screw rod and an expansion piece, wherein the expansion piece is sleeved on the screw rod and is positioned through a gasket and a nut which are arranged on the screw rod; and anti-skid grooves are formed in the two end faces of the gasket.

As a limitation of the present invention: the end of the expansion sheet, which is not connected with the sleeve, is a cutting edge, and the cutting edge is made of carborundum.

As a further limitation of the utility model: and one end of the sleeve, which is not connected with the expansion sheet, is symmetrically provided with two clamping holes for clamping the tool.

As another limitation of the present invention: the depth of the annular recess is 2-3 mm.

As a limitation of the present invention: the diameter of the middle section of the sleeve is smaller than the diameter of the two ends of the sleeve.

As a further limitation of the utility model: and one end of the sleeve, which is not connected with the expansion sheet, is provided with a rubber clamping groove.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

(1) the annular concave part and the opening of the expansion sheet can reduce the connecting area of the expansion sheet and the sleeve, so that the expansion sheet is convenient to expand and rebound, the flexibility is strong, after rebounding, the original shape can be recovered, the reuse rate is increased, the friction coefficient can be increased by the anti-skidding groove on the gasket, even if the expansion sheet is used in projects with large shock property such as high-speed rails or subways, the nut cannot be loosened, the tightness is good, and the safety is high;

(2) the carborundum on the expansion sheet can increase the shearing force, so that the expansion sheet can penetrate into a wall body through self-cutting in the expansion process, and the expansion sheet is more firmly fixed;

(3) the clamping hole in the sleeve is convenient for clamping a tool, the tool is clamped in the clamping hole, and the tool is fastened in a forward rotation manner and disassembled in a reverse rotation manner, so that the tool is more convenient to use;

(4) the middle of the sleeve is thin, friction can be reduced when the sleeve is cut at the bottom, the rubber pad clamping groove is arranged, the embedded plate can be fixed conveniently, the two ends of the sleeve are thick, the transverse cutting force of the screw can be reinforced, and the fixing effect is improved.

In conclusion, the expansion sheet has the advantages of good expansion and rebound resilience, high reuse rate, good fastening effect, capability of firmly penetrating into a wall body, high use safety and suitability for all anchor bolts.

Drawings

The utility model is described in further detail below with reference to the figures and the embodiments.

FIG. 1 is a schematic front view of an embodiment of the present invention;

fig. 2 is a schematic front view of the gasket of the present invention.

In the figure: 1-screw rod, 2-sleeve pipe, 3-expansion piece, 4-annular concave part, 5-opening, 6-cutting edge, 7-gasket, 8-nut, 9-clamping hole and 10-rubber clamping groove.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that a self-undercut anchor as described herein is a preferred embodiment, is provided for purposes of illustration and explanation only, and is not to be construed as limiting.

Example a self-undercut anchor

In the embodiment, as shown in fig. 1-2, a self-undercut anchor bolt comprises a screw rod 1 and an expansion member, wherein the screw rod 1 adopts a screw rod structure in an anchor bolt in the prior art, the head of the screw rod 1 is in a truncated cone shape, a gasket 7 and a nut 8 are arranged on a thread at the other end of the screw rod, and the expansion member is sleeved on the screw rod 1 and is positioned by the gasket 7 and the nut 8 arranged on the screw rod 1. The anti-skidding grooves are formed in the two end faces of the gasket 7, friction force between the gasket 7 and the nut 8 and between the gasket 7 and the end face of the sleeve 2 can be increased, and the nut 8 can be effectively prevented from being loosened due to vibration.

The expansion part comprises a sleeve 2 and four expansion pieces 3 fixedly arranged at the end part of the sleeve 2, the diameter of the middle section of the sleeve 2 is smaller than the diameters of the two ends, as shown in figure 1, the expansion pieces 3 are fixed at the end with the larger diameter at the left end of the sleeve 2, and a rubber clamping groove 10 is circumferentially arranged at the end with the larger diameter at the right end and used for fixing the embedded plate. The expansion pieces 3 are arranged around the circumferential direction of the end face of the sleeve 2 and are petal-shaped, and a gap is formed between every two adjacent expansion pieces 3, so that the expansion and resilience are facilitated. The position that inflation piece 3 and sleeve pipe 2 are connected forms annular depressed part 4, and the circumference that is round sleeve pipe 2 is inwards sunken into the groove promptly, the degree of depth of annular depressed part 4 is 2mm, 2.5mm or 3mm, and this embodiment adopts 3 mm. The annular concave part 4 is provided with the opening 5, namely, the semicircular openings 5 are arranged on two sides of the annular concave part 4 of each expansion sheet 3, so that the strength of the joint of the expansion sheet 3 and the sleeve 2 can be reduced, and the elasticity is increased.

The end of the expansion sheet 3 which is not connected with the sleeve 2 is provided with the cutting edge 6, and the cutting edge 6 is made of carborundum, so that the expansion sheet 3 can cut into the wall body and can be fixed in the wall body more deeply, and the firmness is improved. The one end symmetry that sleeve pipe 2 does not connect expansion piece 3 is provided with two joint holes 9 that are used for the joint instrument, convenient to use instrument dismouting sleeve pipe 2.

When the expansion piece fixing device is used, the sleeve 2 is sleeved on the screw rod 1 and placed in a hole which is drilled in advance, then the gasket 7 and the nut 8 are sleeved on the screw rod 2 and placed outside the hole, the nut is screwed, the screw rod 1 moves outwards, the expansion piece 3 is opened, and the cutting edge 6 on the expansion piece 3 cuts into a wall body to achieve the fastening effect. When the expansion piece 3 is detached, the nut 8 is loosened, the clamping hole 9 is clamped by using a special tool, the sleeve 2 is rotated and taken down, then the screw rod 1 is taken out, the head of the screw rod 1 is separated from the expansion piece 3, the expansion piece 3 rebounds, and the original shape is recovered.

Claims

1. The utility model provides a from undercut anchor bolt, includes screw rod and inflation piece, the inflation piece cup joints on the screw rod to fix a position through gasket and the nut that sets up on the screw rod, the inflation piece includes the sleeve pipe and sets firmly a plurality of inflation pieces in sleeve pipe tip, its characterized in that: an annular concave part is formed at the connecting position of the expansion sheet and the sleeve, and an opening is formed in the annular concave part; and anti-skid grooves are formed in the two end faces of the gasket.

2. The self-undercutting anchor bolt of claim 1, wherein: the end of the expansion sheet, which is not connected with the sleeve, is a cutting edge, and the cutting edge is made of carborundum.

3. The self-undercutting anchor bolt of claim 2, wherein: and one end of the sleeve, which is not connected with the expansion sheet, is symmetrically provided with two clamping holes for clamping the tool.

4. Self undercut anchor according to any one of claims 1 to 3, wherein: the depth of the annular concave part is 2-3 mm.

5. The self undercut anchor of claim 4, wherein: the diameter of the middle section of the sleeve is smaller than the diameter of the two ends of the sleeve.

6. The self undercut anchor of claim 5, wherein: and one end of the sleeve, which is not connected with the expansion sheet, is provided with a rubber clamping groove.