Expansion bolt
A technology of expansion bolts and expansion screws, applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problems of loose bolts, falling off, etc., and achieve the effect of reducing operation steps, simple installation, and suitable drilling size.
Inactive Publication Date: 2018-05-08
张印
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AI Technical Summary
Problems solved by technology
Although the expansion bolt can ensure the subsequent use strength, it still needs to be drilled first and then inserted. The diameter of the expansion sleeve of the existing expansion bolt is fixed. When the head of the screw rod enters the interior of the expansion sleeve, the expansion sleeve expands outward. It will become smaller and smaller. If the hole diameter of the wall is larger, the clamping will not be tight or the bolt will fall off. This phenomenon is often encountered in practical operations.
Method used
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[0015] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0016] The orientation in the present invention is based on figure 1 The medium prevails.
[0017] Such as Figure 1-2 As shown, the present invention includes an expansion screw 1 and a nut 2, a gasket 3 and an expansion cylinder 4 arranged on the expansion screw 1 in turn from top to bottom. The bottom of the expansion screw 1 is provided with a sheet-shaped drill 5. This The invention can be drilled into the wall through the drill bit 5 without prior drilling, which ensures that the size of the hole is appropriate and reduces the installation process. The expansion screw 1 and the top of the nut 2 are provided with a number of protrusions 6 , the protrusion 6 is fixed on the expansion screw 1, the number is preferably 2, during installation, the protrusion 6 is clamped with a tool, the hole is twisted in the forward direction, and locked in the reverse direction...
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The invention provides an expansion bolt. By means of the expansion bolt, mounting is simple and convenient while use strength is guaranteed. The expansion bolt comprises an expansion screw, a nut, awasher and an expansion barrel, wherein the nut, the washer and the expansion barrel are sequentially arranged on the expansion screw from top to bottom. A flaky drilling tool is arranged at the bottom of the expansion screw. Multiple protrusions are arranged at the positions, above the nut, on the expansion screw. The expansion bolt has the advantages that drilling does not need to be carried outin advance, the drilling tool of the expansion bolt is directly drilled in, it can be guaranteed that the drilling size is proper, operation steps are reduced and bolt mounting becomes simple; and meanwhile the subsequent use strength is guaranteed through the locked expansion bolt.
Description
technical field [0001] The invention relates to the field of hardware accessories, in particular to an expansion bolt. Background technique [0002] To screw a screw on a brick wall or a concrete wall, you need to use an electric drill to make a hole of a suitable size on the wall, then insert the bolt and tighten the nut. Therefore, in the actual operation process, it is often encountered that the hole punched is not suitable, and it needs to be drilled multiple times or needs something to pad the bolt, which is cumbersome to operate and wastes time, and sometimes there are insufficient bolt strength and low service life. Condition. In order to ensure the strength of use, most of the expansion bolts are currently used. The expansion bolts currently used generally include a screw, a nut and an expansion sleeve. in the hole. Although the expansion bolt can ensure the subsequent use strength, it still needs to be drilled first and then inserted. The diameter of the expansio...
Claims
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Login to View More IPC IPC(8): F16B13/06
CPCF16B13/066
Inventor 张印
Owner 张印