Abstract: An impact screwing/unscrewing device includes: an electric motor having a rotor; a controller for controlling the motor, which can transmit an instruction to the motor; and an impact mechanism. The impact mechanism includes: at least one anvil mounted to rotate about the axis of rotation of the rotor; at least one hammer capable of being rotated by the motor about the axis, the hammer being movable between at least: a non-engaged position in which it is not capable of colliding with the at least one anvil when the hammer is rotated by the motor, and an engaged position in which it is capable of colliding with the at least one anvil when the hammer is rotated by the motor. A variation of the instruction supplied to the motor by the controller triggers passage of the at least one hammer from one of the positions thereof to the other.

Abstract: An impact screwing/unscrewing device includes: an electric motor having a rotor; a controller for controlling the motor, which can transmit an instruction to the motor; and an impact mechanism. The impact mechanism includes: at least one anvil mounted to rotate about the axis of rotation of the rotor; at least one hammer capable of being rotated by the motor about the axis, the hammer being movable between at least: a non-engaged position in which it is not capable of colliding with the at least one anvil when the hammer is rotated by the motor, and an engaged position in which it is capable of colliding with the at least one anvil when the hammer is rotated by the motor. A variation of the instruction supplied to the motor by the controller triggers passage of the at least one hammer from one of the positions thereof to the other.

Abstract: A screw driving tool including: a motor; an impact mechanism driven by the motor along a rotational axis and held fixed in translation along the rotational axis. the impact mechanism has: a striker system with a striker element, a square drive including at least one strike reception element, the striker element being configured to come into contact with the at least one strike reception element to generate an impact torque, the striker system being configured to be driven in rotation, along the rotational axis, on at least 200° before impact. The impact mechanism has an anti-vibrational element configured so that, during an impact: the center of gravity of the impact mechanism is appreciably positioned on the rotational axis, and the rotational axis of the impact mechanism is appreciably on its main axes of inertia.

Abstract: A screw driving tool including: a motor; an impact mechanism driven by the motor along a rotational axis and held fixed in translation along the rotational axis. the impact mechanism has: a striker system with a striker element, a square drive including at least one strike reception element, the striker element being configured to come into contact with the at least one strike reception element to generate an impact torque, the striker system being configured to be driven in rotation, along the rotational axis, on at least 200° before impact. The impact mechanism has an anti-vibrational element configured so that, during an impact: the center of gravity of the impact mechanism is appreciably positioned on the rotational axis, and the rotational axis of the impact mechanism is appreciably on its main axes of inertia.