Rotary drilling rig power head structure with buffer mechanism

Abstract

The invention discloses a rotary excavating drill power head structure with a buffer mechanism, and belongs to the field of engineering equipment, the rotary excavating drill power head structure comprises a power box and a radial buffer structure arranged in the power box, the center of the power box is provided with a driving force main shaft, and the driving force main shaft is sleeved with a gear set locked with the radial buffer structure; the radial buffering structure comprises an upper-layer sliding groove formed in the inner ring of the power box, a lower-layer sliding groove formed below the upper-layer sliding groove, a first gear clamping strip sliding in the upper-layer sliding groove and a second gear clamping strip sliding in an inner cavity of the lower-layer sliding groove, and magnets are installed at the two common ends of the upper-layer sliding groove and the lower-layer sliding groove. The internal structure of the power box is improved, so that the drill bit can rotate back and forth only by intermittent forward rotation in the operation process of the motor, the upper-layer sliding groove and the lower-layer sliding groove are driven by the air cylinder to press downwards, the driving force main shaft stops, the drill bit can rotate forwards and backwards under the driving of the magnet, and the existing defects are overcome.

Description

technical field [0001] The invention relates to the technical field of building construction production equipment, in particular to a rotary drilling power head structure with a buffer mechanism. Background technique [0002] Rotary drilling is a construction technology suitable for hole-forming operations in building foundation engineering. It is widely used in foundation construction projects such as municipal construction, highway bridges, high-rise buildings, etc., and is suitable for dry (short spiral) or Wet (rotary bucket) and rock formation (core drill) hole forming operations. [0003] When it is working, due to the weight between the drill and the drill string, when the drill bit rises and falls, a buffer mechanism is generally installed outside or on the top of the power box. This buffer mechanism is used to reduce the power box. The impact force required when sliding up and down is generally very commonly used for this kind of mechanism. [0004] But when the d...

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Problems solved by technology

[0004] But when the drill bit is working, it often needs to be raised and lowered. When the inside of the drill bit is filled with mud, it needs to be lifted up to clean it. As the power box rises, the drill bit comes to the ground. At that time, the driver will pass through the console. Controlling the power box, we can always find at the scene that when the driver is unloading the drill bit, the drill bit always rotates forward and reverse, and there is a sound around the power box. It is because the motor in the power box is overloaded for a period of time. The motor drives the drive shaft to rotate, and then the drive shaft drives the drill bit to rotate. When the motor is in forward and reverse rotation for a long time, the radial pressure on the motor shaft will increase. Therefore, when unloading, let the motor rotate forward and reverse to increase Increases the risk of motor damage, so it needs to be improved

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