Non-dredging guiding driller dynamic head main spindle

Abstract

A main shaft of a motor head of a no dig guiding driller comprises a driving sleeve which is butt jointed with a driving system, a floating core shaft which is arranged in the driving sleeve, which is slideably matched with an inner hole of the driving sleeve, a transmission torsion splined hub which is fixedly and hard connected with the bottom of the driving sleeve, the transmission torsion splined hub is engaged with an outer spline on the lower portion of the floating core shaft to transmit torque, meanwhile the corn shaft achieves upper and lower floating along the spline, and a floating distance limiting mechanism is arranged between the floating core shaft and the driving sleeve. The torque is transferred to the floating core shaft through an output flange and the transmission torsion splined hub by adopting a core shaft floating way, the return rotating of a drilling tool is achieved by a drill rod of a damageable short segment of the floating core shaft, the core shaft which has no middle transmission step can directly float, and the floating range is bigger than a traditional motor head floating way, the motor head which is fed or back dragged can stay on any position to guarantee the reliability of floating. Centring accuracy is high, a main shaft is not suppressed when the drill rod is detached, and the main shaft is easy to be centered when the drill rod is mounted.

Description

technical field [0001] The invention relates to a non-excavation guiding drilling machine, in particular to a main shaft of a power head of the non-excavating guiding drilling machine. Background technique [0002] On the one hand, the power head of the non-excavation directional drilling rig transmits the rotary motion of the hydraulic motor to the main shaft through the reduction mechanism, so that the shaft drives the drill pipe and the drilling tool to rotate with the rated torque, and plays the role of cutting and cutting to make circular cross-section holes. Function; on the other hand, the force of the feeding device is applied to the power head box, the main shaft bearing and the main shaft through the transmission device, and through the forward and backward movement of the power head, it finally drives the drill pipe mounted on the main shaft and can rotate with the main shaft The drilling tool advances or retreats, so that the circular cross-...

AI Technical Summary

Problems solved by technology

The disadvantages of the above-mentioned floating structure of the power head are: ①The floating structure is set at the relative position between the power head box and the carriage, and the joystick moves the carriage to drive the movement of the power head. When loading and unloading drill pipes, the carriage must be moved first Only when the power head floats in the opposite direction can there be a floating function. The operation is cumbersome, and it is easy to reverse, resulting in misoperation, causing the drill pipe threaded buckle, the spindle system, and the rigid parts of the carriage system to be overloaded and damaged.

②The guide surface has a large gap and swings from side to side, which is easy to cause misalignment, resulting in the output joint not being able to fit the drill pipe when making up the drill pipe, and human intervention is required to align and make up

③The floating range is small, the accuracy is poor, and repeated operations and adjustments are required, and the construction efficiency is low

④In the hydraulic system, the hydraulic valve is used to adjust the main shaft rotary motor. The front motor plus the rear motor or all four motors can realize the floating of the break-in and break-in. The oil circuit is too complicated and there are too many links, which increases the fault points, and it is not easy to break down on the construction site. Solve it, or the machine user can't solve it at all because he doesn't have the basic knowledge of hydraulics

⑤Due to poor floating, centering, and poor positioning accuracy, output joints and drill pipe buckles are easily damaged, and even the phenomenon of thread buckle full circle seizure is prone to occur

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