Handheld drilling machine provided with internally installed silencer device

Abstract

The invention belongs to the technical field of mechanical equipment and relates to a handheld drilling machine provided with internally installed silencer device. The handheld drilling machine comprises an outer shell, a back cover, a front cover, a first handle, a second handle, an air inlet device, an output shaft, an air-operated type power device, a silencer device and exhaust holes, whereinthe first handle is arranged on the side of the outer shell; the second handle is arranged on the other side of the outer shell; the air inlet device is used for introducing the external air into theshell body; a part of the output shaft is arranged inside the shell body; the air-operated type power device is used for driving the output shaft to rotate; the silencer device is arranged inside theouter shell and comprises a shell body, air inlet holes formed in the shell body, air outlet holes formed in the shell body and a silencer structure used for noise reduction, and the silencer structure is arranged inside the shell body; the exhaust holes is used for conducting discharging on the air generated after noise reduction through the silencer device. The handheld drilling machine providedwith internally installed silencer device is compact and reasonable in structure, small in size and convenient to use; operation is stable; the noise reduction effect is good; safety performance andreliability are high; the service life is long; the oil injecting operation is simple, the work efficiency is high; and the handheld drilling machine is worth to being applied and popularized widely.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and relates to a hand-held drilling machine with a built-in noise reduction device. Background technique [0002] Coal mines in my country are mainly mined underground, and a large number of tunnels need to be dug underground. Using tunnel support to protect the smoothness of the tunnel and the stability of the surrounding rock is of great significance to mine construction and production. During the construction of the tunnel support, drilling rigs are required for drilling operations. In order to meet the explosion-proof safety requirements of underground mines, hand-held pneumatic drilling rigs with underground compressed air as the power source are often used for construction. However, hand-held pneumatic drilling rigs will emit high noise during work. Working in this environment for a long time will make the staff The generation of restless emotions can easily lead to safety accide...

AI Technical Summary

Problems solved by technology

[0002] Coal mines in my country are mainly mined underground, and a large number of tunnels need to be dug underground. Using tunnel support to protect the smoothness of the tunnel and the stability of the surrounding rock is of great significance to mine construction and production. During the construction of the tunnel support, drilling rigs are required for drilling operations. In order to meet the explosion-proof safety requirements of underground mines, hand-held pneumatic drilling rigs with underground compressed air as the power source are often used for construction. However, hand-held pneumatic drilling rigs will emit high noise during work. Working in this environment for a long time will make the staff The generation of restless emotions can easily lead to safety accidents, and even directly cause symptoms such as deafness and headaches in workers, which seriously endanger the health of workers; the current existing solution is often to install a silencer at the air outlet of the drilling rig shell. The added silencer not only has poor noise reduction effect, but also greatly increases the volume and weight of the drilling rig, which is very inconvenient to use

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