Chuck device for tools

Abstract

A chuck device for a tool of the type having a bit on an end thereof and a drill on the other end thereof includes a spindle with a stub formed on an end thereof, a tube including a first section mounted around the stub of the spindle and a second section, a sliding sleeve slidably mounted around the tube, and a ball partially received in a transverse countersink in the second section of the tube. A first elastic member is mounted around the tube and attached between an outer shoulder of the tube and an inner shoulder of the sliding sleeve. A second elastic member includes a first end received in the stub and a second end in the tube. When the chuck device is in a condition not receiving the tool, the ball is moved out of the longitudinal hole of the tube and partially located in the annular groove of the sliding sleeve under the action of the second elastic member, and the first elastic member is in a compressed status. When one of the drill and the bit of the tool is inserted into the longitudinal hole of the tube to a position where an annular retaining groove of a shank of the tool aligns with the transverse countersink of the tube, the second elastic member is compressed, the second elastic member returns and thus causes the sliding sleeve to slide along a longitudinal direction of the tube, thereby moving the ball inward to partially engage with the annular retaining groove of the tool bit, thereby retaining the tool in place. When the sliding sleeve is slid along the longitudinal direction of the tube to the position where the annular groove of the sliding sleeve aligns with the transverse countersink of the tube, the second elastic member returns and thus ejects the tool in the longitudinal hole of the tube.

Dependencies are inferred from the claim text.