公开(公告)号：US20040050592A1

公开(公告)日：2004-03-18

申请号：US10603653

申请日：2003-06-26

Applicant: SANDVIK AB.

Inventor： Bo Carlstrom ,  Anders Brungs ,  Christer Lundberg ,  Per-Olof Liljebrand

IPC: E21B010/36 ,  E21B017/042

CPC classification number: E21B17/0426 ,  Y10T403/68 ,  Y10T403/7005

Abstract: A male portion for percussive rock drilling includes sections of reduced cross-sectional area. At least one thread for percussive rock drilling is provided at an end of the male portion. The end of the male portion comprises an abutment surface for the transfer of impact waves. The length of the portion is defined as the length of an imaginary cylinder from a plane of the impact surface to a point where the plane ceases to contact a crest of the thread, wherein the length divided by the external diameter of the cylinder lies within a range of 1-2.

Abstract translation: 冲击岩凿岩的男性部分包括横截面积减小的部分。 在男性部分的末端提供至少一个用于冲击式凿岩的螺纹。 阳部分的端部包括用于传递冲击波的邻接表面。 该部分的长度被定义为从冲击表面的平面到平面停止接触螺纹的顶点的假想圆柱体的长度，其中长度除以圆柱体的外径位于 范围1-2。