Novel composite impact drill

Abstract

The invention discloses a novel composite impact drill. The novel composite impact drill comprises a shell, a punch, a driving device, and an impact mechanism in transmission connection between the driving device and the punch, wherein the impact mechanism comprises a driving gear, an end curved surface gear and an elastic piece; the driving gear is mounted on the shell, and is driven by the driving device to rotate; the driving gear is engaged with the end curved surface gear; and the end curved surface gear is fixed on the punch; the elastic piece is supported between the shell and the end curved surface gear for providing axial elastic force to the end curved surface gear to keep the engagement between the end curved surface gear and the driving gear. The novel composite impact drill has the novel impact mechanism, and the driving gear can be driven by the motor; the driving gear and the end curved surface gear are engaged to generate a compound motion of rotation and axial movement so as to generate impact; the spring provides restoring force to generate a continuous reciprocating motion; and compared with the prior art, the novel composite impact drill simplifies the impact drill mechanism, and can achieve the purposes of reducing the vibration, prolonging the service life and improving the reliability.

Description

technical field [0001] The invention relates to a percussion drill, in particular to a novel compound percussion drill. Background technique [0002] Hammer mechanisms with hammer tube, piston and piston outer guide are known, for example, from hammer drills. Here, the impact mechanism drives the tool repeatedly in the form of rotation and impact, such as a chisel. In order to generate corresponding rotation and impact, the motor drives the crank slider mechanism or the piston driven by high-pressure gas to generate reciprocating motion, and the rotation driven by the motor Combination of movements to form a compound movement of rotation and impact. The impact motion of the drill bit breaks the surface of the excavated object, and the rotary motion brings out the chiseled debris. The rotary motion of the traditional impact drill is generated by the gear reduction mechanism driven by the motor. This structure will cause friction and heat, severe tooth wear, short life, and ...

AI Technical Summary

Problems solved by technology

The rotary motion of the traditional impact drill is generated by the gear reduction mechanism driven by the motor. This structure will cause friction and heat generation, severe tooth wear, short life, and very large vibration and noise.

In addition, some traditional impact drills use the motor to drive the gear reduction mechanism to generate rotational motion and the crank slider to generate impact, which has the problems of complex structure, large vibration and noise.

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