Drilling machine with damping and for pushing inner shaft of motor to be fed in pneumatic mode

Abstract

The invention relates to a drilling machine with damping and for pushing an inner shaft of a motor to be fed in a pneumatic mode. The drilling machine comprises a motor assembly. The motor assembly comprises a shell, a stator, a rotor core and a motor spindle. The motor spindle comprises a spindle sleeve and the inner shaft. The inner shaft cannot rotate relative to the spindle sleeve but can move relative to the spindle sleeve in the axial direction. The front end of the inner shaft stretches out of an end opening of the spindle sleeve and is provided with a connecting component. The drilling machine further comprises a stroke-adjustable damping air cylinder. The stroke-adjustable damping air cylinder comprises an air cylinder body, an air cylinder piston and a damping mechanism. The inner shaft can rotate relative to the damping mechanism but cannot move relative to the damping mechanism in the axial direction. A stroke adjusting mechanism is connected to the rear end of the damping mechanism. By the adoption of the drilling machine, a tool can travel in place at a high speed in the idle stroke, decelerate automatically in the working condition stroke and reset at a high speed in the return stroke, and the working efficiency is improved; the length of the idle stroke and the length of the working condition stroke can be adjusted through the stroke adjusting mechanism, and the application range is wide; and in addition, the structure is simple, the occupied space is small, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to the field of machining equipment, in particular to a drilling machine with a damped pneumatic drive motor inner shaft feed. Background technique [0002] Existing drilling machine, tapping machine are generally made up of frame, squirrel-cage motor, power transmission shaft, lifting sleeve, lifting feed device. The upper end of the transmission shaft is connected to the rear end of the motor shaft through a belt pulley. The transmission shaft and the lifting sleeve are fitted in the form of an inner and outer spline shaft sleeve. A drill chuck is installed at the lower end of the lifting sleeve. The transmission gear of the feeding device is connected by transmission, and the lifting and feeding device drives the transmission gear and the rack to lift through the lifting motor and the gear pair, or directly controls the transmission gear with the handle to implement manual lifting. [0003] The disadvantage of this structure i...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of this structure is that the lifting speed provided by the lifting feed device is a fixed value, and the idle stroke before the drill bit or tap reaches the end of the workpiece is at the same speed as the drilling or tapping operation, and the tool retraction is also at the same speed , but to improve work efficiency, it is required that the idle stroke should be high-speed, and the working condition stroke should be slow

Especially in the automated production line, it will affect the efficiency of other stations

And another kind of known power head is that the traditional mechanical main shaft is driven to rotate by the motor through belt transmission, and the mechanical main shaft is driven by the cylinder to feed and process. The power loss and noise generated in the mechanical transmission process are difficult to get rid of. The center of gravity of the motor is biased toward the end, which requires high rigidity for the clamping and fixing position at the front end, and takes up a lot of space, which is not conducive to the combined use of multiple sets

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