公开(公告)号：US08069929B2

公开(公告)日：2011-12-06

申请号：US12379867

申请日：2009-03-03

申请人： Manabu Sugimoto ,  Hidenori Nagasaka ,  Hiroshi Otsuka

发明人： Manabu Sugimoto ,  Hidenori Nagasaka ,  Hiroshi Otsuka

IPC分类号： E02D173/48

CPC分类号： B25B21/026

摘要： An impact tool includes: a spindle disposed in a housing; an anvil disposed in front of the spindle and rotatably supported by the housing through a metal bearing, a rear surface of the anvil having a bearing hole in which a front end of the spindle is received; an impact mechanism configured to transmit a rotation of the spindle to the anvil; an outer groove formed on an outer periphery of the anvil and opposed to the metal bearing; and a connecting opening radially extending in the anvil and connecting the bearing hole and the outer groove to provide a communication therebetween. The outer groove is formed to have a depth in the range of 3-10% of an outer diameter of the anvil, and the connecting opening opens at a rear end of the outer groove in an axial direction of the anvil.

摘要翻译： 冲击工具包括：设置在壳体中的心轴; 砧座，其设置在所述主轴的前方并且通过金属轴承由所述壳体可旋转地支撑，所述砧座的后表面具有轴承孔，所述心轴的前端容纳在所述轴承孔中; 冲击机构，其构造成将所述心轴的旋转传递到所述砧座; 形成在所述砧座的外周上且与所述金属轴承相对的外槽; 以及在所述砧座中径向延伸并连接所述支承孔和所述外槽以在其间提供连通的连接开口。 外槽形成为深度在砧座的外径的3-10％的范围内，并且连接口在砧座的轴向方向上在外槽的后端开口。