Drill bit

Abstract

The invention provides a drill bit. The drill bit comprises a cylinder body, a mandrel, drill arms, connecting rod drill arms and a guiding drill bit, wherein the mandrel penetrates the cylinder body; one end of the mandrel is fixedly provided with the guiding drill bit; the guiding drill bit is connected with the cylinder body through the connecting rod drill arms and the drill arms; the mandrel is connected with a mandrel moving mechanism; and the mandrel moving mechanism drives the mandrel to move to further enable the drill arms to expand and gather. The drill bit has the characteristics that the contraction angle adjustment range is wide, the stress is uniform, the structural strength is high, and the structure is simple, can meet various demands on drilling and broaching, and can satisfy the requirement that a big hole is drilled after a small hole is drilled in the required depth. When a static pile driver equipped with the drill bit is in use, in case of difficult pile pressing, the drill bit can enter from the inner hole of a pile to perform drilling and broaching, so that the traditional static pile driver can be applied to occasions where pile pressing is difficult, and accordingly, the application range of the static pile driver is enlarged.

Description

technical field [0001] The invention relates to the technical field of static pile driving machine hole reaming pile sinking, in particular to a drill bit of a pile driving machine hole reaming machine. Background technique [0002] Existing pile drivers include static pile drivers, pneumatic hammer pile drivers, and spiral pouring pile drivers. Traditional static pile drivers are difficult to press piles in geological layers such as sand layers, hard soil layers, and differentiated layers, and even Under some geological conditions, the traditional static pile driver cannot perform pile pressing work, and the static pile driver has a high degree of damage to geological layered piles such as sand layers, hard soil layers, and differentiated layers. The piles formed by spiral irrigation also have many disadvantages, such as: the strength and hardness of the spiral irrigation piles are not good enough, and the formation period of the spiral irrigation piles is long. [0003] D...

AI Technical Summary

Problems solved by technology

[0002] Existing pile drivers include static pile drivers, pneumatic hammer pile drivers, and spiral pouring pile drivers. Traditional static pile drivers are difficult to press piles in geological layers such as sand layers, hard soil layers, and differentiated layers, and even Under some geological conditions, the traditional static pile driver cannot carry out the pile pressing work, and the static pile driver has a high degree of damage to geological layered piles such as sand layers, hard soil layers, and differentiated layers.

The piles formed by spiral irrigation also have many shortcomings, such as: the strength and hardness of the spiral irrigation piles are not good enough, and the formation period of the spiral irrigation piles is long

[0003] During the construction of the traditional static pile driver, the pile is directly held and the pile is statically pressed downward without drilling or reaming. Pile is difficult, even under some geological conditions, the traditional static pile driver cannot carry out the pile pressing work

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