Abstract: An electric power tool includes an electric motor with a motor gear, an output shaft with an input gear, a coupling that connects the motor gear to the input gear, and a housing that houses the motor, the motor gear, the coupling and the input gear. The coupling includes a shaft portion and two connective portions arranged at opposite ends of the shaft portion for connection to the motor gear and input gear, respectively. The motor gear and the input gear, each, have a cambered profile allowing a tilting movement of the coupling with respect to an axial position of one of the motor gear and the input gear that has a cambered profile.

Abstract: The present specification relates to a bolt tensioning tool adapted to tension a bolt protruding from a workpiece, and comprising a bolt receiving element (5) adapted to be screwed onto the bolt, a nut socket (10) adapted to receive a nut, an axle (3) adapted to exert an axial force on the bolt receiving element, a threaded sleeve (6) arranged to engage the axle and having an internal thread (6a) adapted to cooperate with an external thread (3a) of the axle (3) such that a relative rotational movement there between results in a relative axial displacement between the axle and the threaded sleeve, a supporting sleeve (2) coupled to the threaded sleeve and adapted to selectively bear against the workpiece and a coupling (9) adapted to connect the nut socket and the supporting sleeve, the coupling is a coupling allowing a limited relative movement between the socket and the sleeve.

Abstract: An electric power tool for tightening screw joints includes a housing that encloses an electric motor, an angle gear, a back torque transducer, and a front torque transducer. The angle gear includes an input bevel gear drivingly connected to the electric motor and an output bevel gear drivingly connected to an output shaft of the electric power tool. The back torque transducer is arranged to measure a back torque reaction value before the input bevel gear. And the front torque transducer is arranged to measure a front torque reaction value after the output bevel gear.

Abstract: A power screw driver includes a housing with a vacuum chamber communicating with a source of sub-atmospheric pressure, a motor, a drive spindle, a screw engaging bit connected to the drive spindle, a suction nozzle surrounding and being rigidly secured to the bit, and a bit supporting sleeve having a forward end part and a rear end part. The rear end part of the bit supporting sleeve is connected to the drive spindle and extends into the vacuum chamber. The forward end part of the bit supporting sleeve in contact with the suction nozzle. At least one longitudinal internal passage extends through the bit supporting sleeve and is arranged to communicate sub-atmospheric pressure from the vacuum chamber to the suction nozzle.

Abstract: An electric pulse tool delivers torque in pulses on an output shaft of the electric pulse tool. The electric pulse tool includes an electric motor with a rotor and a gear arrangement adapted to drive the output shaft. The electrical pulse tool is operative, for each period, to control the speed of the rotor until a play in the gear arrangement is determined to be closed and the gear arrangement starts to move the output shaft.

Abstract: An electric pulse tool includes an electric motor drivingly connected to a flywheel, an output shaft drivingly connected to a drive element, and a compression spring. The electric pulse tool is operative to oscillate the flywheel between a first and a second direction. The flywheel is configured to drive the drive element in the first direction to provide a torque pulse on the output shaft in the first direction, whereby the drive element compress the compression spring. The drive element is configured to drive the flywheel in the second direction, when the compression spring is decompressed and forces the drive element to rotate in the second direction.

Abstract: A method performed by a monitoring node associated with a tool communication network of monitoring energy flow in a tightening tool connected to the communication network includes receiving, from the tightening tool, parameter values relating to current fed (I) into the tightening tool, angle (?) of a rotor in the tightening tool and torque (T) applied to a joint by the tightening tool. The method also includes calculating energy input to the tightening tool based on the received parameter values, calculating energy transferred to the joint by the tightening tool based on the received parameter values relating to the torque applied to the joint by the tightening tool and the angle (?) of the rotor in the tightening tool. The method further includes detecting that the calculated energy input deviates from the calculated energy transferred to the joint by more than a predetermined value.

Abstract: A power wrench includes a cylindrical housing, a motor, and an angle head attached to the housing and supporting an output shaft in a laterally extending position. The angle head is connected to the housing via a swivel coupling to enable rotation of the angle head and adjustment of the angular position of the output shaft relative to the housing. A releasable locking device is included between the angle head and the housing for arresting the angle head in alternative angular positions relative to the housing.

Abstract: An electric power tool, configured to perform tightening operations where torque is delivered in a series of pulses, includes an electrical motor adapted to drive a rotating shaft of the electric power tool, and an angle sensor for sensing a parameter related to an angular displacement of the electric power tool. The electric motor is adapted to be fed with a train of controlled current pulses. The electric power tool is adapted to control a current supplied in the current pulses based at least in part on an output signal from the angle sensor to not exceed a limit threshold value for the parameter related to an angular displacement of the electric power tool.

Abstract: A method and a tool controller enable different functionality sets for at least a first and a second tool. The method includes retrieving at least a first license type that specifies a first set of functions allowed to be performed by at least the first tool retrieving at least a second license type that specifies a second set of functions allowed to be performed by at least the second tool. The method further includes enabling the first set of functions for at least the first tool and enabling the second set of functions for at least the second tool.

Abstract: A power wrench includes a hydraulic pulse unit that includes an impulse generator. A separating arrangement is provided to extract air from oil. The separating arrangement includes a disc-shaped separator element and a sealing arrangement arranged to provide a seal between the disc-shaped separator element and a receiving space in fluid communication with the oil chamber. The disc-shaped separator element provides a passageway between the oil chamber and the receiving space by a fluid opening. The separating arrangement also includes a partitioning element arranged in the receiving space, such that first and a second partial volumes are formed on sides of the partitioning element. The first and second partial volumes are in fluid communication, and the fluid opening is arranged on the first side of the partitioning element.

Abstract: The present disclosure relates to a method and an electric tool for setting an operating mode and/or associate result values of an electric tool. The method comprising the steps of. Detecting at least one radio signal from at least one radio tag positioned on or in relation to an object to be processed, wherein the radio tag comprising an identifier associated with the object. Measuring distances between the electric tool and the at least one radio tag based on radio signal time of flight between the electric tool and the at least one radio tag. Selecting a first radio tag based on the distances. The first radio tag comprising a first identifier. And setting an operating mode of the electric tool based on the first identifier and/or associate result values of the processing steps performed by the electric tool with the first identifier.

Abstract: A method detects whether a fastener is already tightened using a tightening tool with a pulse mechanism. The method includes placing the tightening tool on the fastener, and accelerating rotational parts of the tightening tool. The rotational speed of the rotational parts is limited to a first rotational threshold value in revolutions per minute during an initial tightening phase, the first rotational threshold value being set to be in a range of 20% to 80% of a second rotational threshold value in revolutions per minute needed in a secondary tightening phase to provide a target fastening value for the fastener. And it is detected whether a pulse occurs during the initial tightening phase, the initial tightening phase being measured from a moment when the rotational parts are accelerated.

Abstract: A handheld power tool includes a gear unit, which includes a gear input shaft, a gear output shaft, and a subassembly. The subassembly includes a sun gear co-rotating with the input shaft, an internal ring gear, and at least one planet gear arranged between the sun gear and the internal ring gear. The gear unit further includes a first freewheel clutch mechanism arranged to selectively provide a first torque transferring connection between the gear input shaft and the gear output shaft bypassing the gear unit subassembly when a drive shaft rotates in a first direction and a second freewheel clutch mechanism arranged to selectively provide a second torque transferring connection via the gear unit subassembly when the drive shaft rotates in a second, opposite direction.

Abstract: In a method for an electric pulse tool, which is configured to deliver torque pulses on an output shaft, in each of a plurality of periods, a current pulse is provided to an electric motor during a current-on time and a current feed is paused during a current-off time. The method includes retrieving a parameter reflecting an amount of reaction force that the operator of the electric pulse tool can be exposed to, and determining the current-off time based on the parameter. The determined current off time includes a first off interval until an end of a torque pulse and a second off interval after the end of the torque pulse. The second off interval is based on a width of the torque pulse, such that a wider torque pulse results in a wider off interval and a narrower torque pulse results in a shorter off interval.

Abstract: An attachment part for tightening joints includes an elongate housing including an upper housing part and a lower housing part, an input gear wheel for connection to an output shaft of a power wrench, arranged at a first end of the housing, an output gear wheel for connection to a joint to be tightened, arranged at a second end of the housing, and at least one intermediate gear wheel arranged inside the housing to transmit rotation of the input gear wheel to the output gear wheel, wherein each gear wheel has outer slanted teeth that connect the gear wheels and transmit said rotation there between.

Abstract: An electric pulse tool performs a tightening operation in which torque is delivered in pulses to tighten a screw joint. The electric pulse tool includes an output shaft, a torque sensor to determine a torque value associated with tightening of the screw joint, and an angle sensor to determine an angular displacement of the screw joint. The tool provides low torque pulses of a torque value of less than 15 percent of an electric pulse tool max torque value on the output shaft until a low threshold torque value is reached. Next the tool starts measuring an angular displacement of an element of the screw joint and provides tightening torque pulses of a torque value of more than 15 percent of the electric pulse tool max torque value on the output shaft. The tool stops providing torque pulses on the output shaft when a target parameter is reached.