Drill bit of variable-curvature screw pile driver
A pile driver, variable curvature technology, applied in construction and other directions, can solve problems such as short life, serious clay, unreasonable structure, etc., to achieve the effect of improving service life and work efficiency, reducing soil resistance, and increasing excavation speed
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[0022] A variable curvature spiral pile driver bit, such as figure 1 As shown, it includes a cylindrical drill pipe 1, a drill tip 2 arranged at the end of the drill pipe 1 that enters the soil, a helical blade arranged along the outer peripheral surface of the drill pipe 1, and two drill picks fixed at the end of the helical blade that enters the soil. 3.
[0023] Wherein, the two drill picks 3 are arranged symmetrically to the central axis of the drill pipe 1, and the two drill picks 3 are all bent toward the central axis of the drill pipe 1, and the two opposite sides of the drill picks 3 are curved surfaces, respectively The inner curved surface 301 that touches the soil and the outer curved surface 302 that bends toward the inner curved surface 301 that touches the soil; the other two opposite sides of the drill pick 3 are vertical planes. The contour curves of the inner soil-touching surface in the section along the vertical plane of the drill pick 3 respectively comply...
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