A chuck for use with a power driver having a rotatable drive spindle is provided. The chuck may comprise a plurality of jaws, a front body, a nut, a rear body, and a clutch. The clutch may be configured to move between a working position and a jaw actuating position. In the working position, the clutch teeth may be engaged with the rear body teeth such that rotation of the rear body by the drive spindle rotates the clutch, the front body, and the jaws. In the jaw actuating position, the clutch teeth may not or need not be engaged with the rear body teeth and the rear body may be configured to rotate the nut relative to the front body to move the jaws relative to the front body.

A chuck (10) has a body (14), a plurality of jaws (22), and a rotatable nut (16). A sleeve (18) is rotatable between a first rotational position and a second rotational position with respect to the nut. An annular array of first teeth (84) are non-rotatable with respect to the body. One or more second teeth (63) are non-rotatable with respect to the nut and axially movable with respect to the body. When the teeth engage, they resist the nut's rotation in the opening direction. An engagement between the sleeve and the one or more second teeth moves the one or more second teeth out of engagement with the first teeth when the sleeve moves from the second rotational position to the first rotational position and moves the one or more second teeth into engagement with the first teeth when the sleeve moves from the first rotational position to the second rotational position.

A chuck including a chuck body that supports a plurality of jaws. An outer sleeve is axially fixed with respect to the chuck body. A nut is coupled to the outer sleeve, and the nut is movable axially and radially relative to the chuck body. The nut interacts with the jaws such that when the outer sleeve rotates, the nut moves axially and radially relative to the body.

A crimping accessory and/or a pinching accessory for a power-driven tool is provided. The crimping accessory and/or the pinching accessory can include first and second jaws that are rotatably coupled relative to a guide assembly and an actuating mechanism coupled in the guide assembly. The actuating mechanism includes a trunnion mounted on a rod. First and second cam followers exert a force on first cam surfaces of the first and second jaws as the trunnion moves in a first longitudinal direction, to bring the jaws together in a crimping and/or pinching area of the accessory and exert a crimping and/or pinching force on a workpiece. Movement of a pair of first pins and a pair of second pins along second cam surfaces of the first and second jaws guides an opening movement of the first and second jaws to release the force exerted on the workpiece.

A power tool and operation method for quick locking and releasing working attachment thereof are provided. The power tool includes a housing; a motor in the housing; an output shaft driven by the motor; and a chuck to lock and release a working attachment, said chuck including a chuck body coupled with the output shaft, jaws movably disposed relative to the chuck body, and a clamping sleeve outside the chuck body. The clamping sleeve is movable with respect to the chuck body so as to drive the jaws to retract and open relative to the chuck body. A control mechanism is operable to lock the clamping sleeve or the chuck body relative to the housing, and to control the motor initiating along a preset rotary direction so that relative movement between the clamping sleeve and the chuck body is generated.

Electronic spindle lock for a power tool. One embodiment provides a power tool including a housing, a bit receiving portion provided on the housing for receiving a power tool bit, a motor within the housing configured to rotate the bit receiving portion, and a controller coupled to the motor. The controller is configured to enter an electronic spindle lock mode, and detect rotation of the bit receiving portion in a first direction. The controller is also configured to control motor to rotate in a second direction in response to detecting rotation of the bit receiving portion in the first direction.

A hand-held power tool which includes a gear housing with a gear for transmitting a torque, generated by a drive motor, to a spindle. The gear housing is exchangeably connectable to a tool attachment via an interface in such a way that a torque is transmitted from the spindle to an input spindle of the tool attachment. The interface includes a housing-side interface element with a flange ring, which is connected to the gear housing in a torsionally stiff manner. The housing-side interface element corresponds to a tool attachment-side interface element which includes a fastening ring that is rotatably supported on the tool attachment. The fastening ring is brought into engagement with the flange ring by a coupled rotatory and axial relative movement of the fastening ring with respect to the flange ring so that the fastening ring and the flange ring together form a bayonet-type connector.

A method for holding a spindle of a mobile power tool in order to allow an opening and/or a closing of a tool fitting by turning an operating part of the tool fitting relative to the spindle, where the spindle is rotationally coupled to an electric motor. The method includes detecting a rotation of the spindle and/or of the electric motor in a first direction while a setpoint angular velocity is zero and controlling the electric motor to generate a torque in a second direction which is opposite to the first direction.

A hand-held power tool having a machine housing, a motor, a shaft driven by the motor, and a tool socket. The tool socket is mounted on the shaft. The tool socket has a holding space to hold a tool and it has a clamping jaw situated in a link and projecting into the holding space. A carriage coupled to the clamping jaw is provided with a screw drive that has a thread on the carriage and a mating thread on the shaft. An actuation element movable between a first position and a second position is provided in order to select either the operational mode or else the loosening or tightening of the clamping jaws. A switchable coupling is mounted on the tool socket. The switchable coupling alternatingly engages either with the shaft or with the machine housing, depending on the positions of the actuation element.

A tool holding system for a rotary power tool is configured to clamp around a working tool when the working tool is inserted in the tool holding system. The tool holding system includes a sleeve having a frustroconical inner surface portion, a collet having frustoconical outer surface portion complementary to the inner surface portion, a spring mount operably connected to a motor for rotation by the motor, and a spring. The spring includes a first end portion operably connected to the collet to bias the collet toward a first position whereat the outer surface portion engages the inner surface portion, and a second end portion rotationally fixed with respect to the spring mount.