公开(公告)号：US4854789A

公开(公告)日：1989-08-08

申请号：US114120

申请日：1987-10-27

Applicant: Nicholas Evseanko, Jr.

Inventor： Nicholas Evseanko, Jr.

IPC: B23B51/00 ,  B25H1/00

CPC classification number: B25H1/0064 ,  B23B51/0009 ,  B23B2251/48 ,  B23B2251/50 ,  Y10S408/713 ,  Y10T408/5565 ,  Y10T408/655 ,  Y10T408/90993

Abstract: A cutting tool assembly and, more particularly, a novel holding device for cutting tools, especially such as flat beaded drill bits which are employed in the drilling of track rail. A tool holder possessing a generally solid cylindrical construction, having a first cylindrical shank portion is adapted to be fixedly installed in the rotary drive unit of a rail drill, and wherein the tool holder includes a second cylindrical shank portion coaxial with the first shank portion having a tool-mounting projection end. A clamping member extends transversely across a longitudinal slot formed in the second shank portion whereby actuation of the clamping member, such as a screw or the like, will selectively widen or narrow the slot. The shank end of a flat beaded track drill is inserted into the slot, with raised longitudinal beads on the opposite surfaces of the drill bit engaging into complementary longitudinal grooves formed in the facing surfaces of slot in the tool holder.

Abstract translation: 更具体地说，一种用于切割工具的新型保持装置，特别是用于轨道轨道钻孔中的扁平串珠钻头。 具有一般实心的圆柱形结构的工具架具有第一圆柱形柄部分，适于固定地安装在轨道钻机的旋转驱动单元中，并且其中工具夹具包括与第一柄部分同轴的第二圆柱柄部分， 工具安装投影端。 夹紧构件横向延伸穿过形成在第二柄部分中的纵向狭槽，由此夹紧构件（例如螺钉等）的致动将选择性地加宽或缩小狭槽。 扁平串珠轨道钻头的柄端插入槽中，钻头的相对表面上的凸起的纵向胎圈与形成在工具架中的槽的相对表面中的互补纵向槽接合。