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    • 5. 发明授权
    • Masonry drilling tool
    • 石工钻具
    • US07137461B2
    • 2006-11-21
    • US10674195
    • 2003-09-29
    • Markus Meierhofer
    • Markus Meierhofer
    • E21B17/22
    • E21B10/58B23B51/00E21B10/40E21B10/445
    • A masonry or rock drilling tool suitable for use with a rotary hammer has a drilling head (4, 104) at a forward end of the tool. A forwardly extending cutting plate (6, 106) is fitted or formed on the drilling head (4, 104). First and second opposing axially extending channels (36, 38, 136, 138) are formed on the circumferential periphery of the drilling head. The tool has a clamping shank (2, 102) at a rearward end of the tool suitable for fitment within a tool holder of a rotary hammer. An intermediate helical conveying portion (10, 110) extends between the drilling head and the clamping shank. The intermediate helical conveying portion has at least four helically extending flutes (14a–d, 114a–d) separated by corresponding helically extending webs (12a–d, 112a–d). The first of the axially extending channels extend axially rearwardly from a forward facing face of the drilling head into two of the four flutes. The second of the axially extending channels extend axially rearwardly from the forward facing face of the drilling head into the other two of the four flutes. Conveying properties of the tool are substantially enhanced by having each axially extending channel leading into two of the four flutes.
    • 适用于旋转锤的砌体或岩石钻孔工具在工具的前端具有钻头(4,104)。 在钻头(4,104)上装配或形成向前延伸的切割板(6,106)。 第一和第二相对的轴向延伸通道(36,38,136,138)形成在钻头的圆周周边上。 该工具在工具的后端具有一个夹紧柄(2,102),其适于装配在旋转锤的工具架内。 中间螺旋输送部分(10,110)在钻头和夹紧柄之间延伸。 中间螺旋输送部分具有由相应的螺旋形延伸腹板(12a-d,112a-d)分开的至少四个螺旋形延伸的槽纹(14a-d,114a-d)。 轴向延伸通道中的第一个从钻头的前面向轴向后延伸到四个凹槽中的两个。 轴向延伸通道中的第二个从钻头的前向面向轴向延伸到四个凹槽中的另外两个。 通过使每个轴向延伸的通道导入四个槽纹中的两个,实质上增强了工具的输送特性。