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.

In a tool attachment for fastening to a fastening interface of a hand-held machine tool, having a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation, the locking unit having a rotatable locking body, and a first rotational position of the locking body being associated with the unlocked state and a second rotational position of the locking body being associated with the locked state, the locking unit has a locking member which is configured to prevent rotation of the locking body from the second rotational position into the first rotational position in the locked state.

A chuck (300) may include a lock disk (380), a ball retainer (350), a lock sleeve (360), a wedge pin (371), and a pin drive spring (320). When the lock sleeve (360) is disposed in the locked position, the wedge pin (371) may be positioned by the pin drive spring (320) in a wedged engagement between a pin engaging surface of the ball retainer (350) and a lock disk wall (381) of the lock disk (380) to prevent rotation of a first sleeve (30) and a nut (40) relative to a body (41) in a first rotational direction but permit rotation in a second rotational direction. When the lock sleeve (360) is disposed in the unlocked position, the wedge pin (371) may be positioned by the pin drive spring (320) such that the wedge pin (371) is not in the wedged engagement to permit rotation of the first sleeve (30) and the nut (40) in the first rotational direction and second rotational direction.

A chuck assembly for use with a rotary power tool. The chuck assembly includes a chuck body, a plurality of jaws, and a plate. The chuck body has a plurality of passageways, a plurality of jaws, and a plate. The plurality of jaws are each received within one of the plurality of passageways for co-rotation with the chuck body about the axis, each of the jaws comprises a groove extending in a direction perpendicular to the axis and along a first radial side, an inner side, and a second radial side of the jaw. The plate comprises a plurality of notches, each notch receiving the groove of one of the plurality of jaws to couple the plate to the plurality of jaws, the plate moving with the plurality of jaws to set an axial stop for the tool bit.

Illustrative embodiments of power tools with spindle locks are disclosed. In one illustrative embodiment, a power tool may include a drive train including an output assembly, the output assembly including a spindle configured to support a tool element, a power source configured to selectively supply energy to the drive train to cause the output assembly including the spindle to rotate, a switch movable between a first position in which the power source does not supply energy to the drive train and a second position in which the power source supplies energy to the drive train, and a spindle lock configured to automatically engage the output assembly including the spindle when the switch is in the first position and to automatically disengage the output assembly including the spindle when the switch is in the second position, the spindle lock preventing rotation of the output assembly including the spindle when engaged.

A chuck device in which a rotary sleeve provided to a main body is rotated, and by rotation of an annular rotary body which rotates together with the rotary sleeve, jaws screwed together with the rotary body are expanded, contracted, advanced, and retracted, and a tool is gripped by the jaws; the chuck device comprising a retaining engaging body for engaging with the rotary body and preventing the rotary sleeve from coming out of the rotary body; wherein the retaining engaging body is provided to be fixed to a proximal end side of the rotary sleeve; a rotation transmission part for directly or indirectly transmitting the rotation of the rotary sleeve to the rotary body is provided to the retaining engaging body; and the rotation of the rotary sleeve is transmitted to the rotary body via the retaining engaging body, and the rotary body rotates together with the rotary sleeve.

A chuck (300) may include a lock disk (380), a ball retainer (350), a lock sleeve (360), a wedge pin (371), and a pin drive spring (320). When the lock sleeve (360) is disposed in the locked position, the wedge pin (371) may be positioned by the pin drive spring (320) in a wedged engagement between a pin engaging surface of the ball retainer (350) and a lock disk wall (381) of the lock disk (380) to prevent rotation of a first sleeve (30) and a nut (40) relative to a body (41) in a first rotational direction but permit rotation in a second rotational direction. When the lock sleeve (360) is disposed in the unlocked position, the wedge pin (371) may be positioned by the pin drive spring (320) such that the wedge pin (371) is not in the wedged engagement to permit rotation of the first sleeve (30) and the nut (40) in the first rotational direction and second rotational direction.

A chuck assembly for a rotary power tool includes a chuck body rotatable about a central axis. The chuck body has a plurality of slots, each oriented at an oblique angle relative to the central axis. The chuck assembly also includes a plurality of jaws, each movable along a respective one of the slots. The chuck assembly also includes a collar coupled to the plurality of jaws. The collar is selectively engageable with the chuck body such that, when engaged, the plurality of jaws are movable along the plurality of slots in response to rotation of the collar.

Disclosed are a clutch device, a drill chuck, a power tool, and a bidirectional rotation method of the drill chuck. The clutch device comprises a return elastic member, a transmission assembly and a rotating portion, wherein the transmission assembly comprises at least two oppositely arranged engagement portions; the engagement between the two engagement portions enables a front body and a rear body to rotate synchronously; the rotation of the rotating portion in a first direction enables the return elastic member to be compressed, such that the two engagement portions are disconnected; and the rotation of the rotating portion in a second direction enables the compressed return elastic member to return to an initial position such that the two engagement portions are engaged. The drill chuck comprises a front body, a rear body, clamping jaws and the clutch device; and the power tool comprises a driving shaft and the drill chuck.

A chuck assembly for a rotary power tool includes a chuck body rotatable about a central axis. The chuck body has a plurality of slots, each oriented at an oblique angle relative to the central axis. The chuck assembly also includes a plurality of jaws, each movable along a respective one of the slots. The chuck assembly also includes a collar coupled to the plurality of jaws. The collar is selectively engageable with the chuck body such that, when engaged, the plurality of jaws are movable along the plurality of slots in response to rotation of the collar.