发明公开
- 专利标题： PERCUSSION DEVICE FOR A HYDRAULIC ROCK DRILLING MACHINE, METHOD OF OPERATION OF A PERCUSSION DEVICE AND HYDRAULIC ROCK DRILLING MACHINE INCLUDING A PERSUSSION DEVICE
- 专利标题（中）： 冲击装置的液压凿岩机，用于操作熔断装置和液压凿岩机带有防震装置
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申请号： EP13859021申请日： 2013-10-30
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公开(公告)号： EP2925949A4公开(公告)日： 2016-07-20
- 发明人: JOHANSSON THOMAS
- 申请人： ATLAS COPCO ROCK DRILLS AB
- 专利权人： ATLAS COPCO ROCK DRILLS AB
- 当前专利权人： ATLAS COPCO ROCK DRILLS AB
- 优先权： SE1251341 2012-11-28
- 主分类号： E21B1/26
- IPC分类号： E21B1/26 ; B25D9/12 ; B25D9/26
摘要：
A percussion device for a hydraulic rock drilling machine (1) including, inside a cylinder (4), a to and fro moveable impact piston (3), which is provided with a land portion (12) for cooperation with a braking recess (11) in the cylinder (4) for the establishment of a braking chamber in advanced positions of the impact piston, wherein a throttle slit (17) is arranged to be established between the land portion (12) and the braking recess (11). A pressure channel (14), being connected to a pressure medium source, is arranged to debouch in the cylinder (4) between the piston guiding device (6) and a position of the land portion (12) in a most advanced position of the impact piston (3). The invention also concerns a method and a hydraulic rock drilling machine.
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