Drill bit

Abstract

The invention provides a drill bit which comprises a cylinder, a core shaft, a drill arm, a connecting rod drill arm and a precursor drill bit body. The core shaft penetrates through the cylinder, one end of the core shaft is fixed with the precursor drill bit body, the precursor drill bit body is connected with the cylinder through the connecting rod drill arm and the drill arm, the core shaft is connected with a core shaft moving mechanism, the core shaft moving mechanism pushes the core shaft to move, and then the drill arm is made to be opened and closed. The drill bit has the advantages of being in large in contraction angle adjusting range, even in stress, large in structural strength and simple in structure, various drilling and bearizing requirements can be met, and the requirement that a small hole is firstly drilled, and after the required depth is achieved, a large hole is drilled can be met. A static pile driver with the drill bit can enter a pile inner hole to carry out drilling and bearizing work when pile pressing is difficult, the traditional static pile driver can be applied to the occasions where pile pressing is hard, and the use range of the static pile driver is widened.

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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