Patent ID: 6247705
Filing Date: 2001-06-19
Classification: B23B,Y10S,Y10T

Abstract:
A manually tightened drill chuck comprising:a bearing (1), jaws (9), a split nut (7), a bearing (6), a bearing gasket (5), a front sleeve (10), a rear sleeve (2), a nut jacket (8), a retainer for the front sleeve (10) or a retaining spring, uniformly distributed angled bores and a nut groove being provided on the body member (1);the body member (1) being fitted with interference to the bearing gasket (5), the jaws (9) being respectively received in the uniformly distributed angled bores around the body member (1), the split nut (7) being mounted in the nut groove of the body member (1) to form a threaded transmission by fitting with threads of the jaws (9), the nut jacket (8) being fitted with interference to the outer side of the split nut (7) to make the split nut (7) into an integral whole, and the nut jacket (8) being fitted within the front sleeve (10); andwherein the nut jacket (8) has a periphery connected with interference to the split nut (7) and has a bottom portion further comprising several axially spaced keyslots (12') are cut out for transmitting torques, and keys (12) correspondingly provided on the front sleeve (10) are inserted into said key slots (12') of the bottom portion of the nut jacket (8) such that when the front sleeve (10) is rotated, the nut jacket (8) is driven to rotate, and further the split nut (7) is driven to rotate, thus causing the jaws (9) to advance or retract in the angled bores of the body member (1) and achieving the opening or closing of the jaws (9).