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Explosive fastening screws

A technology for fastening screws and screws, which is applied in the direction of connecting components, pins, mechanical equipment, etc., can solve problems such as difficult installation, inability to expand and open, and potential safety hazards, and achieve the effect of improving installation efficiency and reducing processing costs

Active Publication Date: 2015-09-09
营口鲲驰汽保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the surface of the overcoat 92 of this pulling screw is a smooth surface, and it is easy to slip during the process of screwing with the screw 91 and rotates with the screw 91, so it is difficult to achieve the pulling effect, thus making the screw unable to be fastened. , and even the overcoat 92 cannot be expanded and opened to cause unusability, so there will also be potential safety hazards
And as figure 2 The top explosion screw shown is difficult to install, and its expansion sleeve is quite difficult to open. If it encounters a high-density or high-grade floor or floor, especially stone, it is basically impossible to expand and open, and there are also potential safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment one, as image 3 As shown, the main body screw 2 includes two independent parts, the screw body 23 and the limit expansion head 25, the tapered surface 21 is arranged on the upper part of the limit expansion head 25, and the limit expansion head 25 is sleeved on the screw rod The body 23 can be moved up and down to a suitable position to adapt to installation holes of different depths. After moving to a suitable position, the limit expansion head 25 can be fixed on the screw body 23 by pressing, punching a concave point 20 or hitting a pin. That is, the screw body 23 can be rotated, so that the non-slip expansion screw sleeve 1 expands and opens under the pressure of the conical surface 21 of the limiting expansion head 25 . The lower part of the screw body 23 can be either a threaded rod with an external thread or a rod with a smooth side wall. When it has an external thread, it can also be used to screw the support as described in the first embodiment The ...

Embodiment 2

[0032] Embodiment two, such as Image 6 As shown, the main body screw 2 is a chandelier screw, its tail is provided with an external thread to cooperate with the non-slip expansion screw sleeve 1, its middle is provided with a tapered surface 21, and its top is provided with an enlarged nut 26, the nut 26 The periphery is provided with concavo-convex patterns, and the top surface is provided with a straight, cross or polygonal groove 27, which can be used for twisting the main body screw 2. When installing, drive the anti-slip expansion screw sleeve 1 into the installation hole, turn the main body screw 2, due to the anti-slip effect of the anti-skid positioning of the outer wall protrusion 12 of the anti-slip expansion screw sleeve 1, the anti-slip expansion screw sleeve 1 is under the pressure of the tapered surface 21 The expansion is opened, and the main body screw 2 can be installed with lighting or other objects.

Embodiment 3

[0033] Embodiment three, as Figure 7 As shown, the main body screw 2 is a welding connection screw, and its tail is provided with an external thread to cooperate with the non-slip expansion screw sleeve 1. The middle part is provided with a tapered surface 21, and its top is a flat connection head 28. The side wall of the tip 28 has at least one plane for welding other objects, in the present embodiment, such as Figure 8 As shown, the cross-section of the splice 28 is generally square. After turning the main body screw 2 to make the anti-slip expansion screw sleeve 1 open and fixed in the installation hole, other objects can be welded and fixed on the connecting head 28 by welding. In addition, a limiting convex edge 29 that limits the depth of the main body screw 2 into the installation hole can be provided along the periphery at the joint between the connecting head 28 and the middle part of the main body screw 2, and the exposed connecting head after installation can be ...

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Abstract

An expansion bolt and a slip-proof expansion sleeve thereof. The slip-proof expansion sleeve (1) comprises a cylindrical wall, and multiple cutting grooves (11) arranged on one end of the cylindrical wall and extending towards the middle portion thereof in the axial direction, forming for the slip-proof expansion sleeve (1) multiple blade units that open outward easily. The slip-proof expansion sleeve (1) is provided on the inner wall thereof with an internal thread capable of mating with the bolt, and on the outer wall with a slip-proof rough surface (12). The slip-proof expansion sleeve (1) of the present invention can be used in tandem with various types of main bolts to form the expansion bolt of the present invention, such as fastening screws for ceiling, lighting, welding, and pendant. The expansion bolt of the present invention provides an increased friction between the slip-proof expansion sleeve and an installation bore, thus preventing slipping during installation and increasing greatly the efficiency of installing the expansion bolt.

Description

technical field [0001] The present invention relates to a fastening screw and its parts, in particular to the structural improvement of an overturning screw and its expansion sleeve. The overturning fastening screw of the present invention is suitable for fixing objects on the ceiling, wall or ground . Background technique [0002] In the prior art, in order to fix objects on the ceiling, wall or ground, expansion screws are needed, and the commonly used expansion screws include top-explosion screws and pull-explosion screws. Among them, the common pull-explosion screw, such as the Chinese utility model patent whose notification number is CN201190716Y, such as figure 1 As shown, it is composed of a screw 91 and an overcoat 92 that are screwed together. The upper part of the overcoat 92 is evenly divided into a plurality of lobes 93, and the middle part of the screw 91 is provided with a tapered surface. The tapered surface can spread the lobes 93 on the outer casing 92 to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B13/06
CPCF16B13/066F16B13/001
Inventor 温少松
Owner 营口鲲驰汽保设备有限公司
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