[Problem] A chuck device capable of reliable locking with a simple structure is provided. [Solution] A chuck device (1) including a plurality of balls (41); a retainer (42) which holds the balls (41) so as to be rolled; a spring ring (34) configured to rotate together with a nut ring (33) and to switch between a rotation restricted state in which the retainer (42) is restricted in a loosening direction (L) and a restriction released state in which the restriction of the retainer (42) in the loosening direction (L) is released; and a one-way spring (31) which restricts the retainer (42) in the loosening direction (L) relative to a chuck body (11), in which the plurality of balls (41), the retainer (42) and the one-way spring (31) configure a one-way bearing mechanism (50) restricted in the loosening direction (L) provided between the nut ring (33) and the chuck body (11), and the retainer (42) in the rotation restricted state configures a bearing and lock mechanism (30).

A chuck for a power tool includes a chuck body extending along a longitudinal axis. The chuck also includes a plurality of jaws, each with a jaw end, and each movable along a respective jaw axis between a closed position and an open position. Each respective jaw axis is oriented at an oblique angle relative to the longitudinal axis. A biasing member is coupled to the jaws and is operable to bias the jaws toward the closed position. The biasing member includes a spring. The chuck also includes a rotating assembly selectively engageable with the jaws such that, when engaged, the jaws are movable in response to rotation of the rotating assembly. The biasing member includes a guide sleeve coupled to each of the jaws and movable axially along the longitudinal axis in response to each of the jaws moving along its respective jaw axis.

A chuck has a body (14). A plurality of first teeth (96) are rotationally fixed to the body. At least one second tooth (100) opposes the first teeth. The first teeth and the at least one second tooth are configured so that engagement of the first teeth and the at least one second tooth prevents relative rotation between a nut (16) and the body in an opening direction. A sleeve (18) defines a notch (90b) that engages a spring (29) so that in a relative rotational position between the sleeve and the nut, the notch receives the spring so that the notch resists relative rotational movement between the sleeve and the spring in the opening direction of the chuck.

A chuck assembly includes a chuck body rotatable about an axis, a plurality of jaws each received within a slot of the chuck body for co-rotation with the chuck body about the axis, a wedge engageable with an outer surface of each jaw, a pusher coupled to the plurality of jaws to bias the plurality of jaws in a forward direction into engagement with the wedge, and a tightening sleeve threadably coupled to the chuck body for relative rotation with the chuck body. The tightening sleeve includes a clamping surface engageable with the wedge for inwardly displacing the plurality of jaws in a radial direction, causing the plurality of jaws to secure a tool bit received within the chuck assembly, in response to rotation of the tightening sleeve relative to the chuck body in a tightening direction.

A chuck includes a chuck body extending along a longitudinal axis, the chuck body including a plurality of slots each arranged at an oblique angle with respect to the longitudinal axis. A plurality of jaws each includes a first engagement portion, a jaw end, and a drive end. Each of the jaws is disposed within one of the plurality of slots and is movable between a close position and an open position. A biasing member is coupled to the plurality of jaws and is operable to bias the plurality of jaws toward the close position and a rotating assembly is selectively engageable with the plurality of jaws such that when engaged, the plurality of jaws are movable in response to rotation of the rotating assembly.

In a hand-held machine tool, having a tool holder for holding at least one first tool, which has a tang having a first coupling contour that is able to be connected to the tool holder and having a striking mechanism for the striking drive of the first tool connected to the tool holder in the axial direction of the tool holder in a striking operation associated with the hand-held machine tool, a chuck adapter is provided to hold at least one second tool, which has a tang provided with a second coupling contour, which is able to be connected to the chuck adapter in a torsionally fixed manner.

An actuator for use with a power tool is disclosed. The power tool includes a spindle-chuck body defining a tool axis and a collet nut surrounding the tool axis and rotatable about the tool axis. The collet nut is coupled to the spindle-chuck body. The actuator comprises a holder positionable to engage the spindle-chuck body and an actuation assembly including a first member positioned to engage the collet nut when the holder engages the spindle-chuck body and a second member operatively coupled to the first member to rotate the first member about a first axis. The second member is rotatable about a second axis non-parallel to the first axis.

A method of operating a power tool chuck assembly includes inserting a tool bit within a central bore of a chuck body, displacing a plurality of jaws with the tool bit from an extended position to a retracted position, displacing the jaws from the retracted position toward the extended position with a spring, rotating a tightening sleeve about a rotational axis in a tightening direction, thereby imparting an axial displacement to the tightening sleeve relative to the chuck body, inwardly displacing a plurality of clamping nuts in a radial direction in response to engagement between a wedge defined on the tightening sleeve and the clamping nuts, causing respective threads on the clamping nuts and the jaws to engage, and applying a clamping force on the tool bit with the jaws in response to continued rotation of the tightening sleeve in the tightening direction.

A drill chuck has a chuck body having a plurality of angularly spaced and axially extending but angled guide grooves each holding a jaw that is axially displaceable between an axially front closed position and an axially rear open position. Each jaw has an outer edge formed with external teeth, and also has an axially rearwardly directed rear face extending at an acute angle to a plane perpendicular to the axis. A ring rotatable on the body about the axis has an internal screwthread meshing with the teeth, and an adjustment sleeve rotationally coupled to the ring is rotatable to move the jaws between the open and closed positions. A cover disk on the rear end of the body is formed with respective throughgoing chip-discharge holes each having an inner end aligned with a respective one of the grooves and an outwardly open outer end.

A chuck for use with a power driver having a rotatable drive spindle is provided. The chuck may include a sleeve comprising a sleeve tightening surface that may be configured to engage with a nut tightening surface to tighten a nut when the sleeve is rotated into a tightening position. With the sleeve disposed in a sleeve locked position, a click pawl may be engaged with a click stopping edge of one of the plurality of click teeth to inhibit rotation of the nut in a first rotational direction to loosen the nut. A lock pawl may also be engaged with a lock stopping edge of one of the plurality of lock teeth to inhibit rotation of the sleeve in a second rotational direction due to the inertia in the sleeve that would tend to further tighten the nut.