公开(公告)号：US4735529A

公开(公告)日：1988-04-05

申请号：US944139

申请日：1986-12-19

Applicant: Wade Short

Inventor： Wade Short

IPC: B23B31/20 ,  B23C5/24 ,  B23B51/08

CPC classification number: B23B31/201 ,  B23C5/242 ,  Y10T408/9065 ,  Y10T408/9098

Abstract: An improved tool holder for a metal removing machine includes a generally cylindrical head having a longitudinal passageway formed co-axially therethrough. The outer cylindrical surface of the head includes means for supporting one or more cutting tools thereon. The inner surface of the passageway formed through the head includes a threaded intermediate diameter portion and a relatively smaller diameter portion. An insert ring is disposed within the passageway at the junction of the intermediate and smaller diameter portions of the passageway. The insert ring includes a ramp surface which provides a smooth transition from the intermediate diameter portion to the relatively smaller diameter portion. A generally hollow cylindrical collet is provided which is sized to fit within the threaded intermediate portion of the passageway. The collet includes an enlarged end portion having a first chamfered edge adapted to abut the ramp surface of the insert ring when the collet is inserted in the passageway. A threaded hollow cylindrical shank is provided to retain the collet within the head. The external surface of the shank is threaded to cooperate with the threaded intermediate portion of the passageway. A longitudinal passageway is formed co-axially through the shank having a chamfered shoulder adapted to abut a second chamfered edge of the enlarged end portion of the collet when inserted within the passageway. Rotation of the shank within the threaded passageway causes the shank and the collet to be advanced longitudinally therethrough until the collet engages the ramp surface of the insert ring. A drill bit may be inserted through the head passageway into the interior of the collet. Further rotation of the shank causes the enlarged end portion of the collet to be compressed, thereby frictionally retaining the drill bit within the head.

Abstract translation: 用于金属去除机的改进的工具保持器包括大致圆柱形的头部，其具有与其同轴地形成的纵向通路。 头部的外圆柱形表面包括用于在其上支撑一个或多个切割工具的装置。 通过头部形成的通道的内表面包括螺纹中间直径部分和相对较小直径的部分。 插入环设置在通道内的通道的中间部分和较小直径部分的接合处。 插入环包括斜坡表面，其提供从中间直径部分到相对较小直径部分的平滑过渡。 提供了一个大致中空的圆柱形夹头，其大小适于装配在通道的螺纹中间部分内。 所述夹头包括具有第一倒角边缘的扩大端部，当所述夹头插入所述通道中时，所述第一倒角边缘适于邻接所述插入环的所述坡道表面。 提供螺纹的中空圆柱形柄以将夹头保持在头部内。 柄的外表面是螺纹的，以与通道的螺纹中间部分配合。 纵向通道同轴地形成穿过柄部，其具有倒角的肩部，该倒角的肩部适于在插入通道内时抵靠夹头的扩大端部的第二倒角边缘。 柄部在螺纹通道内的旋转导致柄部和夹头纵向延伸通过，直到夹头接合插入环的斜面。 钻头可以通过头部通道插入夹头的内部。 柄的进一步旋转导致夹头的扩大的端部被压缩，从而将钻头摩擦地保持在头部内。