QUICK RELEASE CHUCK DEVICE

摘要

A quick-change chuck (10) has a body (12) having a recess (14) for receipt of a circular tool shank (16) and includes a number of tapered slots (18) communicating with the recess (14). An outer sleeve member (20) is coaxial about the body (12) and axially movable relative thereto. An axial spring (24) is disposed between the sleeve (20) and the body (12) biases the sleeve (20) longitudinally relative to the body (12) to a biased position. The sleeve (20) is axially movable against the biasing force of the spring (24) to a released position. Tapered pins (26) seated within the slots (18) contact a pin engaging surface (22, 122) on the inner diameter of the sleeve (20) and are forced radially inward within the slots (18) so as to extend into the recess (14) in the sleeve's (20) biased position. The pins (18) are movable radially outward within the slots (18) as the sleeve (20) is moved to its released position. The sleeve (20) can include a polymer sleeve (125) surrounding a cylindrical insert (121) with an axially extending slit (135) disposed through the insert (121) and between adjacent pin engaging surfaces (122).