FIELD: construction.
SUBSTANCE: device for formation of screw profile on well walls under bored piles containing working tip connected hinged coupling with drill rod, upper end of which through clamp is connected with reduction gear mounted on a moving beam, on which drive sprocket is installed in bearings, shaft being chain transmission via free running mechanism is connected with drive shaft reduction gear. Drive sprocket is suspended on chains, one end of which is fixed on metal structure, and second is connected with drive. In order to increase reliability, durability and simplification of design drive translational-rotational movement of rod is made in form of a reduction gear equipped with free running mechanism secured at moving beam, installed in guides, output shaft through clamp is connected to drilling rod, and input-with driving sprocket, suspended on chains, one end of which is fixed, and second is connected with drive.
EFFECT: invention relates to devices which increase bearing capacity of bored piles, and can be used in construction of foundations of buildings and structures.
1 cl, 3 dwg
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