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1. 发明公开

EP0468515A1 Excavation tool 有权
标题翻译： Bohrwerkzeug。
公开(公告)号：EP0468515A1
公开(公告)日：1992-01-29
申请号：EP91112588.8
申请日：1991-07-26
申请人： MITSUBISHI MATERIALS CORPORATION
发明人： Hayashi, Takeshi c/o Gifu-Seisakusho Mitsubishi , Sato, Shigeru, c/o Gifu-Seisakusho Mitsubishi , Tsujimoto, Katsuaki c/o Gifu-Seisakusho Mitsubishi , Miyazaki, Daishiro c/o Gifu-Seisakusho Mitsubishi , Hiwasa, Yoneo c/o Gifu-Seisakusho Mitsubishi , Ishimatsu, Toshiki c/o Tokyo-Shiten MITSUBISHI , Wada, Kimiyo, c/o RMC THOWA CORPORATION
IPC分类号： E21B10/32 , E21B10/38 , E21B10/62
CPC分类号： E21B10/38 , E21B10/327 , E21B10/62
摘要： The invention relates to an excavation tool in which a device is provided which receives the striking force of a hammer and the rotational force of a hammer cylinder, and in a bottom surface of which at least three axle holes (2a; 2b; 2c) are provided displaced from a center of the device (2) and at equivalent angular intervals in the circumferential direction. Block axles (3a; 3b; 3c) are inserted in the axle holes (2a; 2b; 2c) in a freely rotatable manner, and blocks (11 a; 11b; 11c) which are roughly fan-shaped and have bits embedded in the lead end surfaces thereof are provided at lead end parts of the block axles (3a; 3b; 3c) so that left- and right- side faces (12a; 12b) of said blocks (11a; 11 b; 11c) are in mutual opposition and arc parts (12c) of all blocks (11 a; 11 b; 11 c) together form roughly a circle shape. When said device is rotated in the direction of excavation, said blocks (11 a;; 11 b; 11 c) rotate as a result of the resistance to excavation of the bottom part of the excavation hole, one intersection part of the side faces (12a; 12b) and the arc part (12c) of each block (11a; 11b; 11c) protrudes beyond the outer circumferential surface of the device by a predetermined excavation amount, and the mutual positions of the block axles (3a; 3b; 3c) with respect to the blocks (11a; 11 b; 11c) are so determined that both side faces (12a; 12b) of each block (11a; 11 b; 11 c) come into contact with the side faces (12a; 12b) of neighboring blocks (11 a; 11 b; 11 c) at this time.
摘要翻译：本发明涉及一种挖掘工具，其中提供一种装置，其接收锤击的冲击力和锤筒的旋转力，并且在其底面中至少有三个轴孔（2a; 2b; 2c）设置在设备（2）的中心处并以圆周方向的等角度间隔移位。块轴（3a; 3b; 3c）以可自由旋转的方式插入轴孔（2a; 2b; 2c）中，并且块（11a; 11b; 11c）大致扇形并且具有嵌入在引线其端面设置在所述块体轴（3a; 3b; 3c）的前端部，使得所述块体（11a; 11b; 11c）的左右侧面（12a; 12b）相互相对并且弧形所有块（11a; 11b; 11c）的部分（12c）一起形成大致圆形。当所述装置沿挖掘方向旋转时，所述块体（11a; 11b; 11c）由于抵抗挖掘孔底部的开挖而转动，侧面（12a; 12b）的一个相交部分）和每个块（11a; 11b; 11c）的弧形部分（12c）以预定的挖掘量突出超过装置的外周面，并且块轴（3a; 3b; 3c）的相对位置相对于每个块（11a; 11b; 11c）的两个侧面（12a; 12b）与邻近块（11a; 11b; 11c）的侧面（12a; 12b）接触; 11b; 11c）。

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