公开(公告)号：US20160144498A1

公开(公告)日：2016-05-26

申请号：US14945950

申请日：2015-11-19

Applicant: SANDVIK MINING AND CONSTRUCTION OY

Inventor： Timo MUUTTONEN ,  Antti KOSKIMÄKI ,  Ari KOTALA ,  Timo LEINO

IPC: B25D9/18 ,  E21B1/00 ,  B25D17/06

CPC classification number: B25D9/18 ,  B25D17/06 ,  B25D2217/0023 ,  E21B1/00

Abstract: A percussion piston for a rock drill machine having a pilot cylinder, a distributor and a pressure medium includes a control edge configurable to cause a change in the position of the distributor in a direction parallel to the axial direction of the percussion piston as the percussion piston moves in the impact direction (A) in relation to the pilot cylinder. The control edge of the percussion piston includes at least one notch provided on the outer periphery of the control edge and arranged to cause a start of a state change for the distributor before the control edge of the percussion piston passes by a corresponding control edge provided on the distributor or pilot cylinder

Abstract translation: 用于具有先导缸，分配器和压力介质的凿岩机的冲击活塞包括可配置成使得分配器在平行于冲击活塞的轴向的方向上的位置改变的控制边缘，作为冲击活塞 相对于先导气缸在冲击方向（A）上移动。 冲击活塞的控制边缘包括设置在控制边缘的外周上的至少一个凹口，并且布置成在冲击活塞的控制边缘经过相应的控制边缘之前引起分配器的状态改变开始 分配器或导向缸