A power driver includes a motor and a spindle having a distal end thereof opposite the motor. The distal end has an axial bore formed therein. A gear assembly is disposed operatively between the motor and the spindle so that the motor rotationally drives the spindle through the gear assembly. A grip is mounted in the spindle in communication with the axial bore. A driver is mounted about the spindle in operative communication with the grip so that activation of the driver in a closing direction moves the grip radially toward the axis and activation of the driver in an opening direction moves the grip radially away from the axis.
CLAIM OF PRIORITY
This is a continuation of application Ser. No. 09/729,572 filed Dec. 4, 2000, now U.S. Pat. No. 6,729,812, which is a continuation-in-part of application Ser. No. 09/455,223 filed Dec. 6, 1999, now abandoned, and claims the benefit of U.S. Provisional Application No. 60/226,631 filed Aug. 21, 2000. Each of these applications is incorporated by reference herein.
A quick-change system for changing a collet or bit on a tool has a base member to be attached to the body of the tool, an input member to be selectively latched to or unlatched from the tool body, an output member coupled to the input member via a torque multiplication device and having splines that are engageable and disengageable with a collet nut for the tool having a splined member when the two parts are moved relative to each other a given axial distance. When the input member is latched to the tool's body, the output member and the collet nut are disengaged so as to allow the collet nut to rotate with the tool's spindle during operation of the tool. When the input member is unlatched from the tool's body, it can rotate freely and is spring biased to cause the collet nut and output member to move into engagement such that torquing the input member loosens or tightens the collet nut to release or clamp the bit, respectively. The torque multiplication device can be a planetary gear system or other torque transmission system.
A drill is provided with a chuck that has an actuator device that is mounted to the housing of the drill and is spaced from the chuck so that a user can activate the chuck between a "chuck mode" and a "drill mode" from a switch mechanism that is mounted remotely from the chuck.
A chuck is provided with a body, a plurality of jaws and an adjustment ring. The adjustment ring is threadably engaged with the jaws. When the adjustment ring is rotated in one direction, the jaws tighten by moving closer to each other. When the adjustment ring is rotated in the opposite direction, the jaws loosen by moving away from each other. An impact member is also provided for engagement with the adjustment ring. When the drive shaft of the power tool is rotated, the adjustment ring impacts against the impact member. As a result, the adjustment ring and the body of the chuck rotate relative to each other causing the jaws of the chuck to loosen or tighten depending on the direction the drive shaft is rotating.
A chuck is provided with a body, a plurality of jaws and an adjustment ring. The adjustment ring is threadably engaged with the jaws. When the adjustment ring is rotated in one direction, the jaws tighten by moving closer to each other. When the adjustment ring is rotated in the opposite direction, the jaws loosen by moving away from each other. An impact member is also provided for engagement with the adjustment ring. When the drive shaft of the power tool is rotated, the adjustment ring impacts against the impact member. As a result, the adjustment ring and the body of the chuck rotate relative to each other causing the jaws of the chuck to loosen or tighten depending on the direction the drive shaft is rotating.
