Gun drill

Abstract

A pistol drill includes a casing (20), a switch (19), a drill bit (1), a drill shaft (2) and an electric machine having a rotor and a stator, the rotor of the electric machine includes a rotor casing (18), a main shaft (17), also provided is an output device for adjusting rotating speed of the rotor, which includes a governor gear, a planetary gear mechanism and a clutch mechanism. The invention makes the pistol drill output three different speeds using the output device for adjusting rotating speed of the rotor, and achieves purpose of cutting drill based on the requirement of the big and small cutting drill, increases intensity of the drill, improves useful life of the drill and safety of operator.

Description

technical field [0001] The invention relates to a pistol drill, in particular to a speed-regulating pistol drill capable of outputting three different speeds. Background technique [0002] At present, the pistol drills commonly used in the market include drill bits, drill shafts, housings, switches, motors, etc., all of which can only perform cutting and drilling at a single rotation speed, usually at a relatively fast speed. Since holes with different diameters need to be processed in the actual working process, for holes with smaller diameters, a high-speed rotating drill can achieve good processing results. However, for holes with larger diameters, the high-speed rotating drill bit will increase the friction between the drill bit and the workpiece. At this time, a large amount of frictional heat will cause the drill bit to produce annealing phenomenon, thereby reducing the hardness of the drill bit, and cutting holes cannot be achieved. required machining requirements an...

AI Technical Summary

Problems solved by technology

However, for holes with larger diameters, the high-speed rotating drill bit will increase the friction between the drill bit and the workpiece. At this time, a large amount of frictional heat will cause the drill bit to produce annealing phenomenon, thereby reducing the hardness of the drill bit, and cutting holes cannot be achieved. required machining requirements and reduce the life of the drill bit

Moreover, the high-speed rotating drill bit will make the metal chips become very long when processing large-diameter holes, which will hurt the safety of the operator.

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