An anti-jamming fastener striking tool

Abstract

The invention relates to an anti-jamming fastener striking tool, belonging to the technical field of electric tools. The piston of the energy storage mechanism of the tool is fixedly connected to the firing pin. One side of the cylinder is provided with a handle, one side of the gun mouth is provided with a nail box, and a lifting mechanism is provided between the handle and the nail box; the lifting mechanism contains missing teeth to allow position of the driving wheel, the axle of the driving wheel is transmission connected with the motor; the driving wheel is set on the axle to form a circumferentially constrained axial moving pair, which has two extreme positions of engaging with the striker and disengaging, and tends to the meshing position; the end face of the driving wheel It has a cam pin that forms a cam pair with the displacement cam; the displacement profile of the cam allows the driving wheel to approach the meshing position at the initial stage of lifting, and forces the driving wheel to be in the disengaged position at the end of lifting. After adopting the present invention, with the help of the drive wheel displacement curve, possible direct meshing interference with the striker can be effectively avoided, completely eliminating the out-of-control movement of the striker and ensuring operational safety.

Description

technical field [0001] The invention relates to an anti-jamming fastener hitting tool, in particular to an electric gas spring nail gun, which belongs to the technical field of electric tools. Background technique [0002] As far as the applicant knows, for a long time, the tools used to fix one object to another object with the help of nail-type fasteners are mainly pneumatic tools, including high-pressure gas, gas combustion, etc., but these types of tools are either inconvenient to use, or High cost of use. For this reason, innovative electric gas spring nail guns have appeared in recent years. There are two types of typical structures. One is disclosed in US patents US8011441 and US8267296. The firing pin engaged with it stores energy by compressing the air in the cylinder through the piston. Another type of typical structure is disclosed in the Chinese patent document with application number 201621041199.3. This type of nail gun is driven by a motor to rotate the miss...

AI Technical Summary

Problems solved by technology

[0003] However, it has been found in practice that, in the above-mentioned existing nail gun operation, due to various reasons, when nails are stuck occasionally, such as figure 1 , figure 2 shown, whether the drive wheel is figure 1 The pinion transmission shown, or figure 2 The gear transmission shown, because the striker 4 is blocked and does not move to figure 2 The normal limit position shown by the dotted line, so the gear teeth of the driving part 9 may interfere with the striker 4 when it is lifted again, that is, it is blocked and cannot enter the meshing state. parts, and because the air in the cylinder still has a certain pressure, once the staple is removed, the striker will move out of control, resulting in a safety hazard

[0004] For this reason, the technical solution disclosed in the U.S. patent literature with the application number US20180154505A1 attempts to solve the above-mentioned problems by providing an elastic engagement member on the drive wheel to avoid interference, but the elastic engagement member with a certain degree of freedom is not only complicated in structure, but also reliable. Poor sex

The 201621041199.3 patent also provided a pawl locking structure to prevent the striker from running out of control, but this not only increased the complexity of parts assembly and control

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