Automatically-expanded type drill bit for drilling machine

The utility model provides an automatically-expanded type drill bit for a drilling machine. The automatically-expanded type drill bit comprises a drill rod, wherein one end of the drill rod is sleeved with a first connection sleeve; the rear end of the drill rod is sleeved with a second connection s...

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Bibliographic Details
Main Author LIN ZONGHUI
Format Patent
LanguageChinese
English
Published 19.11.2014
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
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Summary:The utility model provides an automatically-expanded type drill bit for a drilling machine. The automatically-expanded type drill bit comprises a drill rod, wherein one end of the drill rod is sleeved with a first connection sleeve; the rear end of the drill rod is sleeved with a second connection sleeve; a first supporting rod and a second supporting rod, which are symmetrical to each other, are mounted between the first connection sleeve and the second connection sleeve; one end of the first supporting rod is mounted on the first connection sleeve through a first connection pin and the other end of the first supporting rod is hinged to one end of the second supporting rod through a second connection pin; the other end of the second supporting rod is mounted on the second connection sleeve; a third connection sleeve is mounted at the tail of the drill rod and is fastened with the second connection sleeve through a clamping sleeve; the clamping sleeve is locked by a screw. The automatically-expanded type dril
Bibliography:Application Number: CN20142285114U