Abstract: A portable power tool 1 has a tool holder 2 for retaining a tool 3, a handle 7, an electric motor 4, and a drive train 10. The drive train couples the electric motor 4 to the tool holder 2. The drive train 10 contains a planetary transmission 11 with a planet carrier 13 and a plurality of planet gears 14. At least one of the planet gears 14 has a cylindrical cutout 30 and the planet carrier 13 has a collar 24 in the form of a circular arc that protrudes into the cutout 30.

Abstract: A powered fastener driver includes a driver blade movable from a top-dead-center (TDC) position toward a driven or bottom-dead-center (BDC) position, a gas spring mechanism for driving the driver blade toward the BDC position, a lifter assembly having a rotary lifter for returning the driver blade from the BDC position toward the TDC position, and an arm upon which the rotary lifter is supported. The fastener driver also includes a motor which, in a first position of the rotary lifter, provides torque to the rotary lifter to return the driver blade from the BDC position toward the TDC position. The fastener driver further includes a brake mechanism which, when activated, redirects torque from the motor away from the rotary lifter and toward the arm, causing the lifter assembly to move from the first position toward a second position in which the rotary lifter is not engageable with the driver blade.

Abstract: A powered fastener driver includes a driver blade movable from a top-dead-center (TDC) position toward a driven or bottom-dead-center (BDC) position, a gas spring mechanism for driving the driver blade toward the BDC position, a lifter assembly having a rotary lifter for returning the driver blade from the BDC position toward the TDC position, and an arm upon which the rotary lifter is supported. The fastener driver also includes a motor which, in a first position of the rotary lifter, provides torque to the rotary lifter to return the driver blade from the BDC position toward the TDC position. The fastener driver further includes a brake mechanism which, when activated, redirects torque from the motor away from the rotary lifter and toward the arm, causing the lifter assembly to move from the first position toward a second position in which the rotary lifter is not engageable with the driver blade.

Abstract: The invention relates to a screw device for applying torque to a screw partner (12), comprising flat output assembly (10) provided with an output member that can be detachably connected to the screw partner and a drive to which a drive torque can be manually or mechanically applied, particularly by an interconnected angular and/or bevel gear (16), and an assembly (48) for detecting an output torque acting on the screw partner on the output side, the detection assembly associated with the flat output assembly and particularly provided on and/or in a housing (30 32) of the flat output assembly being designed such that it can detect an axial force acting on a helical gear (38) connecting the drive and the output member of the flat output assembly in a torque-transmitting manner and provide same for preferably electronic signal evaluation.

Abstract: A rotary power tool comprises a motor, an output shaft that receives torque from the motor, a clutch positioned between the motor and the output shaft for selectively engaging the output shaft to the motor, and a transducer for detecting an amount of torque transferred through the clutch to the output shaft. The clutch is capable of being actuated from a first mode in which the output shaft is engaged to the motor, to a second mode in which the output shaft is disengaged from the motor, in response to feedback from the transducer of the detected amount of torque transferred through the clutch.

Abstract: A fastening system that comprises a fastener and a single tool that provides both snugging torque and final tensioning to the fastener assembly, from a single side, with a single operator, with no torque feedback. The fastener comprises a nut and a bolt with a head and a shank extending axially from the head. The shank has at least one threaded portion and at least one splined portion, the splined portion defining the end of the bolt. The splined portion remains connected to the threaded portion after final tensioning. The tool comprises a first socket and a second socket, wherein the first socket is engaged with an outer surface of the nut and the second socket is engaged with the splined portion on the fastener. Snugging torque and final tension are both controlled by the tool.

Abstract: A machine tool chip removal device including a coupling interface to couple with a rotatable spindle of a machine tool to facilitate rotation of the machine tool chip removal device about an axis at a rotational speed. The chip removal device can also include a main fluid channel with an opening to receive pressurized fluid from the machine tool. The chip removal device can further include a first fluid delivery channel and a second fluid delivery channel to direct fluid in different directions. Each fluid delivery channel can be in fluid communication with the main fluid channel. In addition, the chip removal device can include one or more valves associated with the first and second fluid delivery channels to selectively allow fluid passage from the main fluid channel to the fluid delivery channels. The one or more valves can be actuated by varying fluid pressure and/or rotational speed.

Abstract: An electric power tool includes a motor and a controller. The controller is configured to control the motor. Specifically, the controller is configured to operate in at least two modes: a first mode and a second mode. The first mode includes a plurality of stages having different control conditions related to the motor. The second mode includes at least a common stage having control conditions same as those for a specific stage among the plurality of stages of the first mode. The common stage of the second mode starts more quickly than the specific stage of the first mode.

Abstract: A liner 7 is provided with a cylinder portion 14a is formed in parallel to the rotation axis, and also a hydraulic fluid flow path 14c is formed which opens to a cylinder portion 14a to communicate with the interior of the liner serving as a high-pressure chamber and a low pressure chamber at the time of occurrence of the striking torque, and an automatic relief mechanism 14 is provided in which a cylindrical valve element 14b having a cutout portion 14b? serving as a flow path for hydraulic oil formed on the outer peripheral surface portion is disposed inside the cylinder portion 14a so as to be freely rotatable.

Abstract: An impact driver includes a motor, a spindle rotated by the motor, a hammer that is movable forward and rearward with respect to the spindle and that has an inner peripheral portion facing the spindle, and an anvil struck in a rotational direction by the hammer. A grease supply path is provided to supply grease to the inner peripheral portion of the hammer.

Abstract: A motorized maneuvering device (1) intended to manoeuvre a moving windable fabric screen (3), the motorized maneuvering device includes an actuator (4), comprising a hollow housing (41) containing a gear motor and a mounting end-plate (7a) which has a first support (11) extending from the end-plate along a first longitudinal axis (X-X?) and cooperating with the housing (41) of the actuator (4) and a second support (12) extending from the end-plate along a second axis distinct from the first axis (Ya-Ya?, Z-Z?). The hollow housing, notably the tubular hollow housing, of the actuator, is closed by the first end-plate support.

Abstract: A handheld power tool device having a drive unit, which includes at least one driveshaft, and at least one rotary percussion mechanism, which includes at least one intermediate shaft oriented at least essentially flush with respect to the driveshaft, and at least two bearings for mounting the driveshaft. It is provided that the bearings for mounting the driveshaft are situated on a side of the drive unit facing toward the rotary percussion mechanism.

Abstract: Methods and devices are provided for using a bone anchor driver for driving inner and outer set closure mechanisms or set screws into a bone anchor assembly. In one embodiment, a bone anchor driver is provided that includes an outer shaft configured to engage an outer set screw coupled to a bone anchor assembly, an inner shaft disposed within the outer shaft and configured to engage an inner set screw coupled to the bone anchor assembly, and a torque limiting mechanism configured to automatically switch between a first position in which it is disengaged from the inner shaft and is engaged with the outer shaft, and a second position in which it is disengaged from the outer shaft and is engaged with the inner shaft.

Abstract: Provided is a battery-powered working machine including a protective bracket which is able to be secured to a casing while being in engagement with a battery pack, which is capable of preventing theft of the battery pack, and which separates a casing-side connection terminal from a battery-side connection terminal at a distance to keep the casing-side and battery-side connection terminals and out of contact with each other.

Abstract: A handheld power tool includes a torque coupling adjustable by the operator, as well as a gear unit for transmitting a torque generated by a drive motor to a drive shaft. The gear unit is advantageously a planetary gear unit; the torque coupling being constructed in such a manner, that in response to slippage of the torque coupling, a coupling component follows a displacement path. The handheld power tool further includes a control unit and a sensor, the sensor monitoring the coupling component for a displacement and transmitting corresponding sensor signals to the control unit. The control unit is configured to control, in particular, switch off, the drive motor as a function of the sensor signals received. It is further provided that the control unit subject the received sensor signals to a plausibility check, in order to determine if actual slippage of the torque coupling is occurring.

Abstract: A threaded member tightening tool for setting the length of drive time to elapse before rotation is switched from high-speed rotation to low-speed rotation. A motor-driven screwdriver system in which a screwdriver bit is first driven at a predetermined high rotational speed only for a high-speed drive time and thereafter driven at a predetermined low rotational speed lower than the high rotational speed. A control unit drive-controls an electric motor so that the screwdriver bit is rotationally driven at a setting rotational speed, measures a tightening time required until a Hall element detects that a threaded member engaged with the screwdriver bit has been tightened completely, calculates an initial setting time by multiplying the tightening time by a predetermined positive value less than 1 and a value obtained by dividing the setting rotational speed by the high rotational speed, and sets the high-speed drive time to the initial setting time.

Abstract: A power tool includes an output shaft for outputting torque, a motor for driving the output shaft to rotate about a first axis, a transmission mechanism for transmitting an output of the motor to the output shaft, a gear box for containing the transmission mechanism, a sleeve for a user to operate so as to adjust a maximum output torque transmitted from the motor to the output shaft, a locating element for limiting an axial position of the sleeve, fastening elements for fixing the locating element to the gear box, and a bearing for supporting the output shaft. The locating element is formed with a containing groove for containing the bearing and locating holes formed on a bottom of the containing groove. The fastening elements are at least partially embedded in the locating holes.

Abstract: A clutch mechanism, for use in a rotary power tool having a motor, comprises an input member to which torque from the motor is transferred and an output member co-rotatable with the input member, the output member defining a rotational axis. The clutch mechanism further comprises a cam surface formed on one of the input member or the output member and a compression spring carried by the other of the input member or the output member for co-rotation therewith. The clutch mechanism also comprises a follower having a circular cross-sectional shape biased against the cam surface by the compression spring. In response to relative rotation between the input member and the output member, the cam surface displaces the follower along a line of action coaxial or parallel with the spring. The line of action does not intersect the rotational axis.

Abstract: A power tool having a rotary impact mechanism and a mode change mechanism. The impact mechanism is driven by an output member of a transmission and includes a hammer and an anvil. The mode change mechanism includes a mode collar that is movable between a first position, in which the mode collar directly couples the hammer to the transmission output member to inhibit movement of the hammer relative to the spindle, and a second position in which the mode collar does not inhibit movement of the hammer relative to the spindle.

Abstract: In an electric driver configured such that a driver bit is coupled to a drive output shaft of an electric motor via a clutch mechanism to perform screw tightening operations, an automatic screw tightening control method and a device in which setting is performed such that an appropriate screw tightened state and various inappropriate screw tightened states in a screw tightening operation can be confirmed and determined, simply and reliably are provided.

Abstract: A drill includes a housing and a motor having a drive spindle. An output spindle is capable of being rotationally driven by the drive spindle via a torque clutch. The drill further includes atangential impact mechanism for superimposing tangential impacts onto the output spindle when activated. The tangential impact mechanism includes a sleeve rotatably mounted on the output spindle, and an anvil rotatably mounted onto the output spindle. The output spindle and the sleeve are rotationally driven by a planetary gear system comprising a ring gear, a sun gear and a planetary gear which is drivingly connected between the ring gear and sun gear.

Abstract: The electric parking brake device comprising a resolver which has a base arranged in a housing so as to face a rotating plate fixed to a rotation axis of an electric motor, wherein a first sheet coil comprising a detecting coil and a second sheet coil comprising a primary coil of an output transformer coupled to a detecting coil are arranged on the opposite face of the rotating plate, and wherein a third sheet coil comprising a excitation coil opposite to the detecting coil and a fourth sheet coil comprising a secondary coil of an output transformer opposite to the primary coil of the output transformer are arranged on the opposite face of the base.

Abstract: A screw-tightening power tool includes a motor housing. A brushless motor has a stator that is fixed to the motor housing and a rotor that is rotatable relative to the stator. A tip-tool retaining part is configured to hold a bit and a clutch is disposed between the rotor and the tip-tool retaining part. A grip housing extends from the motor housing. A switch assembly is provided in the grip housing and a trigger is held by the switch assembly. A sensor-circuit board is fixed to the stator. The sensor-circuit board and the switch assembly are connected by a first cord, and the stator and the switch assembly are connected by a second cord.

Abstract: A driving tool, such as a nailer, includes an electric motor, a crank mechanism driven by the electric motor, and a control apparatus for driving the electric motor. A crank-angle detection or calculation unit (109E) detects the crank angle of the crank mechanism or the motor in order to detect the operation state of the electric motor and a stopped time period of the motor is calculated from the crank angle. A sleep-control unit (109A) switches the driving tool between a sleep mode and a drive-enabled mode. If the stopped time period of the electric motor exceeds a prescribed time period, then the sleep-control unit (109A) switches the driving tool to the sleep mode. In the sleep mode, the electric current supplied to one or more of the control units constituting the control apparatus is reduced or cut off, thereby reducing the power consumption of the driving tool.

Abstract: An impact driver includes a motor, a spindle rotated by the motor, a hammer that is movable forward and rearward with respect to the spindle and that has an inner peripheral portion facing the spindle, and an anvil struck in a rotational direction by the hammer. A grease supply path is provided to supply grease to the inner peripheral portion of the hammer.

Abstract: A tool having a housing assembly, which defines a handle, a motor assembly, a trigger assembly, a spindle and a transmission assembly. The motor assembly is received in the housing assembly and has an output shaft. The trigger assembly is coupled to the housing assembly and is configured for use in actuating the motor assembly. The transmission assembly transmits rotary power between the output shaft of the motor assembly and the spindle. The transmission assembly includes a planetary stage with an input sun gear, an output planet carrier and a compound planet gear having a first planet gear and a second planet gear coupled together for common rotation on the output planet carrier. The planetary stage is selectively operable in a first gear reduction and a second, relatively lower gear reduction in which the compound planet gear cooperates to produce at least one intermediate gear reduction within the planetary stage.

Abstract: A rotating control device for a tubular string includes a body, a housing assembly, and a clamp device. An annulus is formed between the body and the tubular string. The housing assembly includes an annular seal configured to seal off an annulus between the tubular string and the body. The clamp device is configured to selectively permit and prevent displacement of the housing assembly relative to the body. The clamp device includes a first clamp section and a second clamp section coupled to and pivotable about a pivot, and a motor positioned between an end of the first clamp section and an end of the second clamp section, wherein the motor is configured to move the ends of the first and second clamp sections relative to each other.

Abstract: The invention relates to a method for operating a hand-held machine tool with a tangential impact mechanism which can be driven by means of a drive shaft and an electric motor, according to which method an actual torque provided by the drive shaft is adjusted to a required torque depending on a measured motor current, wherein the required torque is less than a triggering torque of the tangential impact mechanism.

Abstract: Described herein is an improved displacement transducer, a closed loop control system incorporating the same, and an improved method of manufacturing of manufacturing a displacement transducer. The improved transducer has several advantages, including improved manufacturability; improved fluid flow within the sensor and reduced cavitation as a result; and the enablement of closed loop control for assisted manual or fully automatic displacement.

Abstract: Methods and devices are provided for using a bone anchor driver for driving inner and outer set closure mechanisms or set screws into a bone anchor assembly. In one embodiment, a bone anchor driver is provided that includes an outer shaft configured to engage an outer set screw coupled to a bone anchor assembly, an inner shaft disposed within the outer shaft and configured to engage an inner set screw coupled to the bone anchor assembly, and a torque limiting mechanism configured to automatically switch between a first position in which it is disengaged from the inner shaft and is engaged with the outer shaft, and a second position in which it is disengaged from the outer shaft and is engaged with the inner shaft.

Abstract: A torsion output tool has a housing, a motor and a transmission assembly. The transmission assembly includes a first planetary gear train. The first planetary gear train has a first planetary gear carrier, a first level planetary gear, a first inner ring gear disposed outside the first level planetary gear and meshing therewith, and a first central wheel sliding in a direction of a first axis to a first position and a second position. The transmission assembly further has a locking member. The locking member slides synchronously with the first central wheel and only locks the relative circumferential positions of the output shaft and the first planetary gear carrier when the first central wheel is at the first position and only constitutes circumferential engagement with the first planetary gear carrier when the first central wheel is at the second position to achieve a drilling mode and an impact mode of operation for the tool.

Abstract: A cutting tool system is provided that includes a locking collar and a bit attachment member. The locking collar is compressible radially inwardly and has a tapering outer surface. The bit attachment member has a tapering inner surface constructed to receive and interface with the outer surface of the locking collar. According to an embodiment, a first groove in the outer surface of the locking collar is alignable with a second groove of the bit attachment member to form a perimeter of a pin receptacle in which is pin is insertable to prevent relative rotation between the locking collar and the bit attachment member. According to another embodiment, the cutting tool system further includes a retainer plate and fasteners constructed to secure the retainer plate directly to the locking collar and to the driving shaft, and to cause inward compression of the locking collar.

Abstract: The invention relates to a power drill, having a tool-clamping device that is coupled to a drive motor via a drive shaft and a torque clutch equipped with a transmission element. The torque clutch has a clutch-adjusting ring that cooperates at least indirectly with at least one clamping element that exerts a prestressing force on the transmission element. An end of the drive shaft oriented toward the tool-clamping device is guided in a bearing that axially fixes the drive shaft in a drilling or screwdriving position and axially releases the drive shaft in an impact drilling position. The bearing cooperates with a bearing holder, which moves the bearing axially via a user-actuatable actuating element. According to the invention, the actuating element is coupled to an adjusting element that axially fixes the transmission element and axially releases the bearing in the impact drilling position and axially releases the transmission element and axially fixes the bearing in the drilling or screwdriving position.

Abstract: A hand-held power tool is provided which includes a clutch housing of a torque clutch, and a planetary gear, situated in a gear housing, for transmitting a torque which is generated by a drive motor to a drive shaft. The clutch housing cooperates with the planetary gear via a pressure plate. The pressure plate is displaced in the axial direction in order to disengage the torque clutch. The axial relative motion of the pressure plate causes an axial relative motion between a switching element and an associated optical sensor, via which the drive motor may be switched off.

Abstract: A power tool, in particular a hand-held power tool, preferably embodied as a cordless screwdriver, is equipped with a torque limiting unit in which the release torque is settable by way of a locking brace that is equipped with a spring brace for locking elements that abut axially against parts of a planetary drive, in particular the ring gear thereof or the planet carrier thereof as a last gear stage, the spring elements of the spring brace and the locking elements being located with a radial offset from one another.

Abstract: It is an object of the invention to provide a technique for enhancing the operability of a power tool. A representative screwdriver 100 is provided which has a motor 110 and a driving mechanism 120. The driving mechanism 120 has a rotation transmitting mechanism including a driving cam 137 and a driven cam 157, and a cam engagement state is switched by movement of the spindle 150 in a longitudinal direction of the spindle. The position of the spindle 150 in the longitudinal direction is detected by a detecting mechanism 162 that is disposed on the opposite side of the rotation transmitting mechanism from a front end region in the longitudinal direction of the spindle 150. A controller 180 controls the rotation speed of the motor 110 based on the detection result of the detecting mechanism 162 and drives the motor 110.

Abstract: To provide a hand-held power tool which is equipped with a motor and can be used in a normal driving mode for a tip end tool and also in driving modes other than the normal driving mode. A power tool in which a tip end tool is driven by a motor to thereby perform a predetermined machining process on a workpiece, wherein the motor is a dual rotor motor comprising: an inner rotor; an outer rotor; and a stator including a driving coil mechanism, with the inner rotor and the outer rotor being coaxially disposed.

Abstract: According to one aspect of the application, a device for driving a fastening element into a substrate has an energy-transfer element for transferring energy to the fastening element. The energy-transfer element can move preferably between a starting position and a setting position, wherein the energy-transfer element is located, before a driving-in procedure, in the starting position and, after the driving-in procedure, in the setting position. According to another aspect of the application, the device comprises a mechanical-energy storage device for storing mechanical energy. The energy-transfer element is then suitable preferably for transferring energy from the mechanical-energy storage device to the fastening element.

Abstract: A torsion-adjustable impact wrench, includes a housing, a powering unit including an impact mechanism configured to generate an intermittently increasing torque, an adjusting unit configured to manually set a first torsion value and generate a corresponding a first torsion signal, a detecting unit configured to detect a rotational speed of the powering unit and generate a corresponding first rotational speed signal, and a control unit configured to generate a control signal for controlling the output of the rotational speed of the powering unit. The control unit generates a second rotational speed signal according to the first torsion signal outputted by the adjusting unit, compares the first rotational speed signal with the second rotational speed signal, and generates a control signal enabling the rotational speed of the powering unit to approach the second rotational speed.

Abstract: An electric power tool includes a voltage step-up condition setting operation unit that serves as a human machine interface and a voltage converter capable of performing a voltage step-up operation to raise a voltage supplied from a power supply and supply a raised voltage to a motor. The voltage converter is further capable of changing a voltage step-up level in the voltage step-up operation in accordance with the operation of the voltage step-up condition setting operation unit. A driving state detection unit generates a driving state signal corresponding to a driving state of the electric power tool. A control unit controls a stop timing of the motor in accordance with the driving state signal.

Abstract: A rotation speed control method for impact type fastening tools has a presetting step and a dynamic control step. The presetting step includes setting a plurality of working positions, and setting a PWM signal with a larger duty cycle as a driving signal in a period after energization so that a motor can rotate at a higher speed and improve work efficiency. When a main controller judges, according to feedback, that the operation enters an impact phase and torsion control is needed to reduce rotation speed, the main controller makes adjustment by driving the motor with a PWM signal with a lower duty cycle corresponding to a working position currently set by the user. The control method improves work efficiency, and meet the user's need of driving a fastener with a higher rotation speed at an early stage of operation.

Abstract: A two-stage locking electric screwdriver, with its main improved features as follow: the electric screwdriver has pre-locking and locking functions; the torque settings of the electric screwdriver can be easily modulated, and meanwhile the torque accuracy and energy efficiency can be improved; the torque modulation type is external modulation, so that the torque modulation can be carried out externally and even the torsion spring can be replaced. Meanwhile, the component structures inside the electric screwdriver is improved through a design that the motor directly drives the clutch and then drive the screwdriver head unit, and that an internal gear clutch is used to replaced the gear unit and clutch unit, so that the number of parts is dramatically reduced to save production cost. During general rotation, the electric screwdriver will not drive the clutch unit, and when the torque jumps to the set value, the internal gear clutch rotates and generates a torque.

Abstract: A method of controlling a hybrid drive-train of a vehicle having a combustion engine with a driveshaft, a transmission with an input shaft and an output shaft that drives a transfer box. An electric machine has a rotor that is connected to the transmission input shaft. A separator clutch is arranged between the engine driveshaft and the transmission input shaft. For coupling of the engine, the engine is first accelerated, with a rotational speed regulation, toward a target speed until a reference speed is reached or exceeded while the clutch remains disengaged, then, with continuous speed regulation, the engine is adjusted to a corrected target speed while the clutch is engaged until a target torque is obtained, then, with torque control, the engine is adjusted to the target torque while the clutch, with differential rotational speed regulation, is regulated to a target speed difference, and finally the clutch is engaged.

Abstract: A surgical handpiece with a rotating spindle for receiving the coupling head of a surgical attachment or a cutting accessory. A gear train has plural drive heads that simultaneously rotate at different speeds. A clutch assembly has pins that move along the length of the spindle. The clutch assembly sets the position of the pins so they will engage one of the drive heads. The spindle rotates with the drive head with which the clutch pins are engaged.

Abstract: A torque-limiting driver has a handle, a body, a torque-limiting assembly and a work-piece engaging tip. The torque-limiting assembly includes an upper and lower shank that have a plurality of teeth circumferentially spaced. The teeth have a vertical face, an inclined face, and a flat peak. There is a spring for applying pressure across the upper and lower shank with multiple washers interposed between the lower shaft and spring. In some instances, there is a round square drive with arched catches having preselected radii to assure operation over certain cycles at selected torque and to reduced nose cone damage and breakage at a predetermined inch pounds of torque.

Abstract: An impact power tool includes an impact mechanism for applying a striking impact to an output shaft by using an output power of a motor. A strike detection unit detects the striking impact applied by the impact mechanism to obtain a striking timing and a striking speed detection unit calculates a striking speed from the striking timing obtained by the strike detection unit and a rotation angle of the motor obtained by a rotation angle detection unit. A control unit counts the number of striking impact detected by the strike detection unit and stops the motor if the number of striking impact reaches a predetermined strike number. The control unit is designed to correct the predetermined strike number when the striking speed obtained in the striking speed detection unit is equal to or lower than a specified striking speed.

Abstract: A hand-held power tool has a tool body, a motor housed in the tool body and a grip part designed to be held by a user, and performs a predetermined operation on a workpiece by a tool bit rotationally driven by the motor. The power tool includes a clutch that transmits torque and interrupts torque transmission between the motor and the tool bit, a non-contact torque sensor that detects torque acting on the tool bit in non-contact with a rotation axis rotating together with the tool bit, and a clutch control system that controls coupling and decoupling of the clutch according to a torque value detected by the non-contact torque sensor.

Abstract: A power tool, in particular a hand-held power tool, preferably embodied as a cordless screwdriver, is equipped with a torque limiting unit in which the release torque is settable by way of a locking brace that is equipped with a spring brace for locking elements that abut axially against parts of a planetary drive, in particular the ring gear thereof or the planet carrier thereof as a last gear stage, the spring elements of the spring brace and the locking elements being located with a radial offset from one another.

Abstract: A hand-held power tool is provided which includes a clutch housing of a torque clutch, and a planetary gear, situated in a gear housing, for transmitting a torque which is generated by a drive motor to a drive shaft. The clutch housing cooperates with the planetary gear via a pressure plate. The pressure plate is displaced in the axial direction in order to disengage the torque clutch. The axial relative motion of the pressure plate causes an axial relative motion between a switching element and an associated optical sensor, via which the drive motor may be switched off.

Abstract: An electric tool has a housing, a motor disposed in the housing, an output shaft, a first planetary gear transmission mechanism, having a power input member, disposed between the motor and the output shaft, and a locking mechanism, having a power output member. The locking mechanism has a locked state and an unlocked state. When torsion is transmitted from the motor to the output shaft, the locking mechanism is in the unlocked state, and the output shaft is driven by the motor to rotate to perform electric operation. When the output shaft reversely receives a force, the locking mechanism is in the locked state, and the power input member of the first planetary gear transmission member is locked to perform manual operation.