Drill bit supporting device of drilling machine

Abstract

The invention relates to a drill bit supporting device of a drilling machine. A drill bit is connected to an output shaft, the output shaft is arranged in a supporting hole which is used for installing the output shaft, a tapered roller bearing which is used for supporting the output shaft is arranged in a supporting hole, a sealing device which is in close contact with the tapered roller bearingis arranged on the outer side of the tapered roller bearing, and the sealing device is located in the supporting hole. According to the device, a deep groove bearing arranged at the lower part of a main shaft is changed into the tapered roller bearing, the advantage is that an inner ring and an outer ring of the tapered roller bearing can be mounted separately, the radial play and axial play of the inner ring and the outer ring can be adjusted by adjusting the axial relative positions of the inner ring and the outer ring during installation and use, and the pre-interference assembly can also be implemented, but the defect of the tapered roller bearing is that when a machine works, the bearing rotates at a high speed, and lubricating grease on the bearing is easy to flow out, so that a groove is cut on a main shaft, and an oil leakage-proof sealing device, composed of an O-shaped rubber and a sealing steel ring which are matched with the groove, is arranged in the groove to overcome thedefect.

Description

technical field [0001] The invention relates to a drill bit supporting device of a drilling machine. The drilling machine of the invention is mainly used in the drilling operation of fire-fighting pipelines. Background technique [0002] During the drilling process of the 219 fire pipe machine four drilling machine, due to the large diameter of the pipe, the drilling vibration of the machine is large, the drill bit blade is easily damaged, and the drilling accuracy is reduced. The reason is that the upper and lower parts of the drilling machine spindle are equipped with dust-proof covers. Deep groove ball bearing, the disadvantage of this type of bearing is that the radial force is not ideal, and further improvement is needed. Contents of the invention [0003] In view of the above defects, the present invention aims to provide a drill support device for a drilling machine which has a reasonable structure and can maintain stable operation during the drilling process of the...

AI Technical Summary

Problems solved by technology

[0002] During the drilling process of the 219 fire pipe machine four drilling machine, due to the large diameter of the pipe, the drilling vibration of the machine is large, the drill bit blade is easily damaged, and the drilling accuracy is reduced. The reason is that the upper and lower parts of the drilling machine spindle are equipped with dust-proof covers. Deep groove ball bearing, the disadvantage of this type of bearing is that the radial force is not ideal, and further improvement is needed

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