Gear changeable structure of screw driver

Abstract

The invention discloses a gear changeable structure of a screw driver. The gear changeable structure of the screw driver comprises a first pipe fitting and a second pipe fitting. The first pipe fitting is fixedly connected with the screw driver, and the second pipe fitting is fixedly connected with a handle of the screw driver. Further, the first pipe fitting, the second pipe fitting, the screw driver and the handle of the screw driver are placed on the same axis. The second pipe fitting is fixedly or movably connected on the first pipe fitting to control the gear changing of the handle of the screw driver. The outer side surface of the first pipe fitting is provided with a long groove hole parallel to the axis. A gear fitting is placed on the inner side of the second pipe fitting and can be fixedly or movably placed inside the long groove hole. The first pipe fitting is provided with a plurality of ring-shaped gap grooves perpendicular to the axis. The long groove hole is vertically communicated with the ring-shaped gap grooves. The gear fitting can conduct circular motion relative to the ring-shaped gap grooves. The gear changeable structure of the screw driver is simple in structure, capable of achieving an effort-saving purpose through adjusting the two pipe fittings to separately use the positions close to the head of the screw driver when a screw is too long or is in a starting stage of mounting a bolt.

Description

technical field [0001] The invention relates to a variable gear structure for a screwdriver. [0002] Background technique [0003] Existing screwdrivers usually consist of a handle and a cutter head, which have a single function and are inconvenient to use. When the screw is long, it is often necessary to use the palm and wrist to rotate the screwdriver with great effort and multiple small angles, so that the hand is prone to soreness and the twisting operation takes a long time. Especially in the initial stage of installing a bolt, it is not necessary to screw the bolt hard, which leads to low work efficiency in the initial stage of installing the bolt. Only when the final stage of screwing the bolt needs to be screwed firmly, the screwdriver can be fully utilized. Contents of the invention [0004] The purpose of the present invention is to solve the above-mentioned existing problems, and to provide a variable gear structure for screwdrivers, which includes two indepe...

AI Technical Summary

Problems solved by technology

[0003] Existing screwdrivers usually consist of a handle and a blade, which has a single function and is inconvenient to use

When the screw is long, it is often necessary to rotate the screwdriver with palms and wrists at small angles for many times, so that the hands are prone to soreness and the screwing operation takes a long time

Especially in the initial stage of installing a bolt, it is not necessary to twist the bolt hard, resulting in low work efficiency in the initial stage of installing the bolt, and the screwdriver can be fully utilized only when the bolt needs to be tightened hard in the final stage of screwing the bolt

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