Drill bit for mine drilling device

• Main Authors: SUO LIBIN, ZHAO HONGJUN, ZHAO HONGLI, LI TAO
• Format: Patent
• Language: English
• Published: 11.02.2015
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a drill bit for a mine drilling device. The drill bit for the mine drilling device comprises a main body, a connecting portion and a plurality of end teeth, the main body comprises a front end face and a rear end face, the end teeth are disposed on the front end face, the connecting portion is mounted on the rear end face and can be connected with or separated from the drilling device, a through hole is formed in the main body, the through hole penetrates the front end face and the rear end face, the plurality of end teeth are arranged on the front end face at intervals to form an annular shape, a first blade and a second blade are arranged on each end tooth, the first blades and the second blades are opposite and equally high, and concave portions are disposed between the first blades and the second blades. Annular positioning rings are firstly machined through the first blades and the second blades when drilling starts, the stability of the drill bit during drilling operation can be enhanced, skewing of the drill bit is not prone to occur, meanwhile, during drilling operation, teeth end faces of the end teeth are meshed with concrete in a concave-convex mode, skewing of the teeth end faces can not occur casually, and the accuracy of drill ways can be improved.