Rotary drilling rig power head buffer mechanism, rotary drilling rig power head device and rotary drilling rig

Abstract

The invention provides a rotary drilling rig power head buffer mechanism, a rotary drilling rig power head device and a rotary drilling rig. The buffer mechanism comprises a power box, a driving cylinder, a buffer sleeve and a buffer unit, wherein the power box is provided with a power output flange, the driving cylinder is provided with a connecting flange, the connecting flange is connected with the power output flange, and the power box is used for driving the driving cylinder to rotate; the driving cylinder is used for being connected with a drill rod and can drive the drill rod to rotate under the driving of the power box; the buffer sleeve is arranged outside the driving cylinder in a sleeving mode and is in sliding fit with the driving cylinder in the axial direction of the driving cylinder; and one end of the buffer unit is connected with the buffer sleeve, and the other end of the buffer unit is connected with the connecting flange. When the buffer sleeve is subjected to impact force of the drill rod, the impact force is directly transmitted to the power output flange through an elastic piece, namely the impact force is directly transmitted to the power box, the driving cylinder cannot be subjected to the impact force, the driving cylinder is not prone to damage, and use is safe and reliable.

Description

Technical field [0001] The invention relates to the field of engineering machinery, and specifically to a rotary excavator power head buffer mechanism, a rotary excavator power head device and a rotary excavator drilling rig. Background technique [0002] The power head is an important part of the rotary drilling rig, providing torque, pressure and impact buffering for drilling. Rotary drilling rigs have the characteristics of large installed power, large output torque, good hole forming quality, flexible and convenient operation, high construction efficiency and low environmental pollution. With different drilling tools, they can adapt to the geological conditions in most areas of our country and have become suitable for construction foundations. It is an important construction machine for bored pile construction in the project. The power head of a rotary drilling rig usually includes a power box, reducer and buffer device. The hydraulic motor is connected to the power in...

AI Technical Summary

Problems solved by technology

[0004] The structure is poorly stressed and easily damaged

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