The invention has the advantages of simple and reasonable structure, convenient production, convenient use and easy replacement, and can change the reciprocating stroke of the drivingnut.
本发明结构简单、合理，方便生产，方便使用，易于更换，可以改变传动螺母的往复行程。
2
When the concave upper nut is tightened, the effect produced is exactly the same as that produced by a hammer driving in a wedge.
当上螺母的凹面与之锁紧时，其效果与用一个锤子敲进一楔子的效果完全相同。
3
Germany skilled, advanced manufacturing processes and technologies, focus on the large nut fastening bolt, disassembly of hydraulic technology and practical application of driving force.