发明名称 |
DISTRIBUTION VALVE AND ROCK DRILLING MACHINE |
摘要 |
Distribution valve (7) for controlling hydraulic flows to different consumers, wherein the distribution valve includes a to and fro movable valve body (8). The valve body (8) includes a central bore hole (38, 39) extending in axial direction which cooperates with a plunger (35) and drives the valve body (8) in a pressurize state. The plunger includes an outer piston portion (36) having reduced diameter (d), which in an end position region of the valve body is arranged, together with a portion (38) of the bore hole having reduced diameter (d), to establish a damping chamber (40) for end position damping of the valve body (8). The invention also relates to a rock drilling machine. |
申请公布号 |
WO2015142259(A1) |
申请公布日期 |
2015.09.24 |
申请号 |
WO2015SE50299 |
申请日期 |
2015.03.17 |
申请人 |
ATLAS COPCO ROCK DRILLS AB |
发明人 |
NILSSON, ULF;JOHANSSON, THOMAS |
分类号 |
E21B1/12;E21B1/26;F16K27/04 |
主分类号 |
E21B1/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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