Abstract: The subject matter of this specification can be embodied in, among other things, a rotary lock assembly that includes a first epicyclic gear assembly having a first sun gear assembly, a first ring gear assembly, and a first planet gear assembly mechanically engaged to the first sun gear assembly and the first ring gear assembly, and a second epicyclic gear assembly having a second sun gear assembly configured to be rotated by the first ring gear assembly, a second ring gear assembly, and a second planet gear assembly mechanically engaged to the second sun gear assembly and the second ring gear assembly.

Abstract: Various methods and systems are provided for a multi-speed electric axle assembly. The multi-speed electric axle assembly includes a grounding plate with an outer interface coupled to a housing interface and an inner stepped splined interface designed to selectively mate with a clutch sleeve. In the assembly, the inner stepped splined interface includes a plurality of steps that each include a first side that perpendicularly intersects a second side and the first side of each step in the inner stepped splined interface includes a clearance between the first side and a stepped surface of the clutch sleeve.

Abstract: A cylindrical transmission includes a housing, an input shaft and an output shaft. The housing includes several circular discs having outside lips, the input shaft and the output shaft being provided on centre lines of the circular discs. The driving gears are provided on the input shaft; and a rotary disc having internal teeth is provided on the output shaft. Several gear shafts are provided between two adjacent circular discs, the gear shafts are located on the outer peripheries of the driving gear between the two adjacent circular discs, several gears are provided on each gear shaft, the gear shaft is adjacent to the rotary disc, one of the several gears is separated from or engaged with the rotary disc internal teeth, and all the circular discs are connected to each other via the outside lips.

Abstract: A multi-mode drill includes a housing, a motor and a transmission mechanism, wherein the motor and the transmission mechanism are received in the housing. The transmission mechanism has a gear reduction component and a main shaft, wherein the gear reduction component is driven by the motor, and the main shaft is connected with the gear reduction component and driven by the gear reduction component to rotate. The multi-mode drill further includes a mode switching mechanism for causing the transmission mechanism to operate in different modes. The mode switching mechanism includes an operation member and an actuator. The actuator is actuated by the operation member and engages with the transmission mechanism. At least an elastic energy storage member is arranged between the operation member and the actuator.

Abstract: A power transmitting component having a actuator with a lead screw, which is driven by a motor and a transmission, a pusher assembly driven by the lead screw, and first and second clutch forks. Translation of the pusher coordinates movement of the first and second clutch forks along respective axes.

Abstract: A compressor system and a method for operating a compressor system is provided. The system includes an air compressor and a planetary gear train having an input shaft connected to a planetary carrier of the gear train and an output shaft connected the compressor and a sun gear of the gear train. A first switchable fixing device fixes one of means of which the planet carrier, the sun gear and a ring gear of the gear train with respect to an outer support, and a second switchable fixing device fixes relative to one another the two of components not fixed by the first switchable fixing device of the planetary gear train.

Abstract: Herein is disclosed a tool, system and method for refueling on-orbit spacecraft. The tool and system are configured to allow for resupply of spacecraft configured to be propelled by either a bipropellant (oxidizer and fuel) or a monopropellant (typically hydrazine). The refueling tool is particularly suited for resupply of satellites not originally prepared for refueling but the system may also be used for satellites specifically designed for refueling.

Abstract: A gear assembly having a shaft, a clutch assembly mounted to the shaft and moveable between forward and reverse positions, forward and reverse drive gears that rotate independently of the shaft, and a transfer gear assembly. When in the forward position, the clutch assembly engages the forward drive gear so that the forward drive gear rotates in the same direction as the shaft. When in the reverse position, the clutch assembly engages the reverse drive gear, which engages the transfer gear assembly to rotate the forward drive gear in the opposite direction as the shaft. The gear assembly may be used on a bicycle to allow a rider to propel the bicycle forward by either pedaling forward or backward.

Abstract: The invention relates to an internal gear hub for a bicycle includes a rotating cam which locates against a retractable cam follower within a multiple speed internal gear hub. The position of the cam determines which speed is selected. The cam is actuated by reversing the direction of the drive input (pedaling backwards) by a fixed or predetermined amount of rotation. The cam follower is retracted when the drive input is reversed and when the rotation is greater than that required to rotate the cam into the next position. When the cam follower retracts, the cam will return to a default position and will select a default speed.

Abstract: An electric power tool includes a housing, a motor disposed in the housing, a planetary gear reduction mechanism and an internal gear. The planetary gear reduction mechanism includes multi-stage planetary gears, multi-stage carriers each configured to carry a plurality of planetary gears, and a bearing assembled with a final-stage carrier from a rear side of the final-stage carrier to rotatably support the final-stage carrier. The internal gear is configured to be rotatable and axially slidable while allowing planetary motion of final-stage planetary gears supported by the final-stage carrier. A gear portion provided on the final-stage carrier is formed as a separate gear which is assembled with the final-stage carrier from the rear side of the final-stage carrier after assembling the bearing with the final-stage carrier.

Abstract: A transfer case having a planetary gear set, a clutch collar, and an actuator. The actuator is configured to actuate the clutch collar between a low speed range position in which the clutch collar engages a planet gear carrier of the planetary gear set, and a high speed range position in which the clutch collar engages a sun gear of the planetary gear set.

Abstract: In a clutch mechanism of a percussion driver drill, a plurality of engageable members held in a gear case is configured to be engageable with an end face of a final-stage internal gear, and a coil spring is configured to press the engageable members against the end face of the internal gear. The coil spring is disposed frontwardly of the engageable members between a switch member and an operating member of a vibration mechanism. A coupling member connected with the switch member and the operating member is disposed to pass through a gap between the plurality of engageable members and detour around a rear end of the coil spring.

Abstract: An arrangement comprising at least one dog clutch which is shiftable for coupling and decoupling a shaft and a component at a transmission. An actuating piston (5) is disposed axially movable, at least to some extent, within the shaft for moving a shifting claw (9) of the dog clutch into a disengaged state and an engaged state. The actuating piston (5) can be pressurized, on both sides, with a pressurizing medium so that the actuating piston (5) can be hydraulically actuated in both directions of movement.

Abstract: A gear assembly for a motor vehicle includes first clutch configured to selectively couple an input shaft to an output shaft and a second clutch configured to selectively couple the input shaft to a planetary gear train. When the first clutch is activated and the second clutch is not activated, the input torque is transmitted from the input shaft to the output shaft such that the output torque relative to the input torque is a first gear ratio. When the second clutch is activated and the first clutch is not activated, the input torque is transmitted from the input shaft to the output shaft through the planetary gear train such that the output torque relative to the input torque is a second gear ratio. When neither the first clutch nor the second clutch are activated, the input torque is not transmitted from the input shaft to the output shaft.

Abstract: A sun gear member, planetary gear members, a first ring gear member, and a second ring gear member together form a paradox gear mechanism. A clutch mechanism is disposed between an input gear member and the first ring gear member. The clutch mechanism rotates the first ring gear member, when the input gear member rotates. The clutch mechanism disconnects transmission of the power to the input gear member when the first ring gear member rotates. The sun gear member and the first ring gear member are individual input elements. When one of the sun gear member and the first ring gear member exclusively rotates, the second ring gear member rotates in accordance with the rotation. The sun gear transmits power more reliably without increasing manufacturing cost and without thwarting downsizing of the product.

Abstract: A drive train system comprising a power transfer unit configured to selectively transfer power from a front driveshaft of a vehicle by providing an output torque through a ring gear, wherein the power transfer unit includes an input shaft that receives torque from a first device, and a first clutch configured to selectively couple the input shaft to the ring gear when activated; a cardan shaft in rotational communication with the ring gear and configured to transfer the output torque; and a rear drive unit coupled to the cardan shaft and configured to selectively transfer the output torque received from the cardan shaft to a rear driveshaft of the vehicle, wherein the rear drive unit includes a torque shaft that is driven by the output torque received from the cardan shaft, and a second clutch that is configured to selectively transfer the output torque from the torque shaft to the rear driveshaft when activated.

Abstract: A coupler for shifting bobbin cradle sets between planetary and rigid mode positions on an umbilical standing machine includes a lever, a pinion gear, and a line shaft positioned through a center of the pinion gear and a cage of the stranding machine. A coupler block is slidable over the line shaft and engageable with the pinion gear to rotate a set of bobbin cradles via the pinion gear and the line shaft. Opposing cam followers controllable with the lever engage splines of the coupler block to shift the coupler block back and forth between being coupled to the pinion gear for planetary mode and coupled to the cage for rigid mode. Hollow sections on either side of the coupler block may engage lugs attached to the pinion gear and the cage, for attachment in planetary and rigid modes, respectively.

Abstract: A handheld power tool with a shiftable mechanism, which is adjustable between two operating positions, has a coupling spring that is coupled with an adjustable shifting member of the mechanism. The coupling spring is embodied as a metastable spring.

Abstract: A clutch device for a power tool includes a case in which a washer, a clutch, a clutch ring, planet gears and a sun gear are installed. The washer is connected with pins to which springs are respectively mounted. When switching and setting the torque by rotating the torque member, the pins do not extend through the clutch. The output torque of the tool is smaller than the input torque of the main shaft, the clutch ring is rotated by the sun gear and the planet gears. The ratchet teeth of the clutch ring are disengaged from the clutch teeth of the clutch. When switching to the drill mode, the pins extend through the clutch and contact with the clutch ring, the motor activates the gear box. Because the clutch ring is fixed by the pins and cannot rotate, the gear box outputs the maximum torque to drill objects.

Abstract: In a speed change device of an electrical power tool, a reset arm is provided separately from a switch lever, which arm is operated by a reset motor. Due to tilting motion of the reset arm, a lock ring can be returned to an unlocking position in which a second stage internal gear can be rotated, so that the speed change device can be rest to a high speed low torque mode.

Abstract: A power tool having a drive component and a housing. In one form, the drive component can be a transmission having a planetary stage with planet gears rotatably mounted on pins of a planet carrier. The pins are spaced circumferentially around the planet carrier such that each pair of adjacent pins is spaced apart by a spacing angle. At least two different spacing angles are employed. In another form, the drive component is selected from at least one of a motor, a transmission and a clutch and the housing is configured with first and second housing components and at least one set of mating conically-shaped features that can cooperate to align the housing components to an axis.

Abstract: A bicycle hub transmission includes a hub axle, a driver, a hub shell, a power transmission mechanism and an auxiliary power transmission mechanism. The driver is rotatably supported by the hub axle. The hub shell is rotatably supported by the hub axle with the power transmission mechanism is operatively disposed therebetween to transmit rotational power from the driver to the hub shell through power transmission paths. The shift mechanism is operatively coupled to the power transmission mechanism to select one of the power transmission paths. The auxiliary power transmission mechanism is disposed between the driver and the hub shell to transmit rotational power from the driver to the hub shell through an auxiliary power transmission path during shifting such that a load path of the power transmission mechanism for the power transmission path being shift to is placed in a substantially unloaded state with the auxiliary power transmission path carrying the load.

Abstract: In a hand-held power tool having a planetary gearbox which is situated in a housing interior formed by a gear housing, at least one cross pin is fastened in the housing interior for axial support of the planetary gearbox in the gear housing.

Abstract: This invention relates to a transmission system for transmitting a driving force from a driving unit D to a driven unit F, a transmission adjustment system for adjusting the transmission system to obtain a continuous shift ratio, a guide cone system for maintaining a concentric circle of a rotation radius when a transmission element such as a chain is rotated, a guide cone/transmission adjustment system and a continuously variable transmission system which are made by combination of the above systems. The transmission system includes the transmission element with a tooth portion for transmitting the driving force from the driving unit D to the driven unit F. A transmission adjustment method in the transmission adjustment system is varied depending upon rotation or stop of a carrier. The guide cone system includes a guide cone having a portion of which comes in contact with the transmission element is formed in a shape of a cone having a constant slope.

Abstract: A drive system with drive and freewheel modes comprises a final transfer element for receiving and rotating with a drive axle, and a final drive assembly in rotational communication with a motor. The final drive assembly is selectively engageable with the final transfer element to drive an axle received by the final transfer element. The final drive assembly has an engaged condition in which power is transferred through the final drive assembly to the drive axle and a disengaged condition in which power is not transferred through the final drive assembly. The final drive assembly comprises a gear set selectively engagable with the final transfer element in the engaged condition such that rotation of the gear set is transferred to the final transfer element. The gear set is selectively disengageable from the final transfer element in the disengaged condition such that rotation of the final transfer element is not transferred to the gear set.

Abstract: A power tool with a housing, a transmission and a switch mechanism. The switch mechanism has an actuator, a rail, a switch and first and second springs. The actuator is non-rotatably but slidably coupled to the housing for movement along a longitudinal axis of the transmission between a plurality of positions to selectively engage one or more members of the transmission at each of the positions such that the transmission operates in one of a plurality of different overall speed ratios. The rail is fixedly coupled to the actuator and is received through the switch such that the switch is slidably mounted on the rail. The first and second springs are configured to bias the switch relative to the actuator in different directions.

Abstract: A clutch arrangement that includes a clutch member and a follower member. The clutch member is coupled to a member of the transmission assembly that is proximate the torsional input of the transmission assembly and which must be in a non-rotating position to permit the transmission assembly to perform a torque multiplication operation. The follower member is biased into engagement with the clutch member to inhibit relative rotation therebetween. As the clutch member and the transmission member are coupled to one another, the transmission assembly is able to perform a torque multiplication operation. When, however, the torsion that is exerted onto the clutch member is sufficient to overcome the frictional engagement between the follower and clutch members, the clutch member, and the transmission member, rotate, thereby inhibiting the capability of the transmission to continue to perform the torque multiplication operation.

Abstract: A transmission mechanism includes a first gear unit having an axially-movable ring gear and a second gear unit having an axially-movable fixing ring. The fixing ring includes first and second protrusions on two sides, respectively. When the ring gear moves, the first inner teeth and the outer teeth of the second planet gear disk are engaged with each other or disengaged from each other. When the fixing ring moves, the first protrusions and the first positioning ridges are engaged with each other or disengaged from each other, or the second protrusions and the second positioning ridges are engaged with each other or disengaged from each other. By the different combinations of the statuses due to movement of the ring gear and the fixing ring, the input speed from the motor gear is transferred into four different speeds which is output from an output shaft.

Abstract: A transmission includes a bevel gear configured to provide power to a shaft of a vehicle and that is rotatably engaged with a collar assembly. The transmission also includes a planetary gear set selectively engageable with the collar assembly. The collar assembly includes a first collar and a second collar. The first collar and the second collar are axially coupled together and independently rotatable relative to one another. The collar assembly is slidable between a first position to engage the planetary gear set and rotate the shaft at a first speed, and a second position to disengage the planetary gear set and rotate the shaft at a second speed. Both the first collar and the second collar disengage the planetary gear set in the second position.

Abstract: An electric power tool includes a cylindrical reducer case accommodating the speed reduction mechanism. The speed reduction mechanism includes a planetary gear train and a movable member which is axially slidable to be engaged with or disengaged from the planetary gear train. The electric power tool includes the reducer case including a slide hole formed through a sidewall of the reducer case and axially extended and a rotary plate which is rotatable around a periphery of the reducer case about the axis, the rotary plate including an operation slot formed axially obliquely and overlapped with the slide hole; a supporting member radially outwardly protruded from the movable member and extended through the slide hole and the operation slot; and a biasing unit for applying a pressing force to the supporting member in a moving direction of the supporting member when the rotary plate is rotated to a position.

Abstract: The present invention broadly comprises a gear selector assembly including a tube with at least one engagement feature, arranged to be disposed within a drive shaft for a transmission, the transmission including at least one gear and the drive shaft including at least one gear actuation assembly; and a differential rotation element coupled with the tube and arranged to be coupled with the drive shaft so that the tube is differentially rotatable with respect to the drive shaft. The tube is arranged to differentially rotate such that the engagement feature engages the actuation assembly and the transmission engages a respective gear from the at least one gear. The assembly includes a means for displacing a portion of the differential rotation element such that the tube axially and rotationally displaces with respect to the drive shaft. The portion axially and rotationally engages with an interface element to controllably position the tube.

Abstract: The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes three planetary gear sets, six torque-transmitting devices, and two fixed interconnections. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members and the transmission housing, and are operated in combinations of three to establish eight forward speed ratios and one reverse speed ratio.

Abstract: A transmission includes a first gear, and a second gear is fixed to one end of a shaft with the second gear engaging the first gear. A bevel gear is rotatably supported on the shaft and engages a power input gear. A hub is fixed to the bevel gear for concentric rotation about the shaft; the hub having a splined outer section. A planetary gear set including a sun gear and a carrier are arranged concentrically about the splined outer section of the hub. A splined section is fixed to an opposite end of the shaft. A collar assembly includes first and second collars, each having internal teeth and external teeth. The first collar and the second collar are axially coupled together and independently rotatable relative to one another, and the collar assembly slidably engages the splined section and the splined outer section.

Abstract: A clutch 100 includes: an internal gear 3 that includes a gear tooth formed on an inner-surface side thereof; a sun gear 4 that is disposed on the same shaft at a central portion of the inner side of the internal gear 3; one or more planetary gears 5 that are disposed between an outer circumferential surface of the sun gear 4 and an inner surface of the internal gear 3; a carrier 6 that is provided with a boss portion 6a that supports rotatably the planetary gear 5; an electromagnetic coil portion 7; a rotation limit member 8 that is slidably inserted into the electromagnetic coil portion 7 in a shaft direction and selectively disposed at a first position for limiting rotation of the internal gear 3 or the sun gear 4 or at a second position for permitting the rotations of the internal gear 3 and the sun gear 4; and an elastic member 9 that is disposed between the electromagnetic coil portion 7 and the first flange portion 8b of the rotation limit member 8.

Abstract: In an embodiment, an electric parking brake system is disclosed. The system may include or comprise a pair of parking cables each connected to a brake. Additionally, the system may include or comprise a motor and a drive gear. The system may also include or comprise a planetary gear unit including or comprising a sun gear connected to the drive gear, a plurality of planetary gears gearedly connected with the sun gear, an internal gear formed along a revolving path of the planetary gears, and an output carrier connected to the planetary gears. The system may further include or comprise a screw-nut unit including a screw member and a nut member screwed to the screw member, the screw-nut unit being connected to the output carrier, and the parking cables being connected to opposite ends of the screw-nut unit, respectively.

Abstract: A transmission for a vehicle includes an input shaft, a carrier sun shaft, and an output shaft. A planetary gear set includes a sun gear coupled with the carrier sun shaft, a ring gear coupled with the output shaft, and a plurality of planetary gears enmeshed between the sun gear and the ring gear. A plurality of shift elements each include a first gear coupled with the input shaft, and a second gear coupled with the carrier sun shaft and enmeshed with the first gear. A plurality of shift clutches are each selectively coupled between a corresponding shift element and the input shaft or carrier sun shaft. A low range clutch is selectively coupled between the input shaft and the plurality of planetary gears. A high range clutch is selectively coupled between the carrier sun shaft and the output shaft. A reverse range clutch is selectively coupled between an immovable feature and the plurality of planetary gears.

Abstract: In the revolving restricted state, the planetary gear meshes with the drive input gear, and the clutch mechanism is unable to transmit the rotational drive force; in the freely revolvable state, the planetary gear is separated apart from the drive input gear, and the clutch mechanism is able to transmit the rotational drive force, the drive transmission switching mechanism is provided with first and second abutting portions which are configured to come into contact with the planetary arm rotated in the freely revolvable state so as to initialize the revolving position of the planetary gear, and the drive transmission switching mechanism is capable of selecting which one of the first and second abutting portions will come into contact with the planetary arm in accordance with the position of the drive input gear transmitting the rotational drive force among the plurality of drive input gears.

Abstract: The present invention is a winch clutch assembly, where the deceleration mechanism of the winch contains an additional second internal gear ring, and its outer annular wall is provided with multiple equally distanced fitting indents. The clutch assembly, external to the deceleration mechanism, has clutch levers shifted in longitudinal motion, where the clutch levers are used either to immobilize in the fitting indents of the second internal gear ring of the deceleration mechanism or to release from their immobilized state, enabling the power to transmit or pause to the steel rope sheave of the winch, to accomplish the clutch function.

Abstract: A hub transmission for a bicycle comprises a hub axle; a driver rotatably supported to the hub axle; a hub shell rotatably supported to the hub axle; a power transmitting mechanism disposed between the driver and the hub shell for communicating rotational power from the driver to the hub shell through a plurality of power transmission paths; a shift mechanism for selecting the plurality of power transmission paths; a shift assist mechanism for communicating rotational power from the driver to the shift mechanism; and a power control mechanism disposed between the driver and the shift assist mechanism and coupling rotational power from the driver to the shift assist mechanism for communicating non-constant rotational power from the driver to the shift assist mechanism.

Abstract: A variable speed transmission that changes the output speed of a power tool in response to an increase in torque. The transmission includes a first transmission portion, a second transmission portion, and an annular connector. The annular connector may move via a spring and a control mechanism between a first position and a second position to vary the power tool output between a first and a second speed.

Abstract: A power tool with a housing, a motor, an output spindle and a transmission assembly with a transmission and a speed selector. The transmission includes a plurality of planetary transmission stages that couple the motor to the output spindle. The speed selector includes only one switch member that is slidably movable between three positions to cause the transmission to operate in a corresponding number of speed ratios.

Abstract: A portable power tool having a relatively compact multi-stage, three-speed transmission and a related method for operating a power tool with a multi-stage, three-speed transmission.

Abstract: A planetary gearbox for a power tool has a planetary carrier and a rotatable sleeve with sun wheel toothing arranged centrally on the planetary carrier. The sleeve has a radial section with outer toothing. Planet wheels are positioned between planetary carrier and radial section and mesh with the sun wheel toothing. A switching ring gear surrounds the planet wheels and has an inner toothing meshing with the planet wheels. The switching ring gear is axiallay moveable on the planet wheels between first and second end positions for switching a transmission ratio. In the second end position the switching ring gear engages the outer toothing of the radial section. A synchronization disk, rotating with the rotary sleeve, is positioned between planet wheels and radial section and acts directly or indirectly by friction on the switching ring gear when the latter is moved from the first into the second end position.

Abstract: A method for operating a portable power tool having a multi-stage, three-speed transmission.

Abstract: An impact power tool includes a motor, a first planetary gear set, a clutch having a sun gear, a second planetary gear set, a transmission shaft, an intermediate shaft, an impact seat and an output shaft. When the clutch moves to a first position, the transmission shaft engages with a second planet carrier of the second planetary gear set and the output shaft. The power of the motor is transmitted to the output shaft via the first planetary gear set, the second planetary gear set, and the transmission shaft in low-speed mode. When the clutch moves to a second position, the transmission shaft disengages from the second planet carrier and the output shaft. The power of the motor is output to the output shaft via the first planetary gear set, the second planetary gear set, the transmission shaft, the intermediate shaft, and the impact seat in high-speed-with-impact mode.

Abstract: A power tool with a housing, a motor, an output spindle and a transmission assembly with a transmission and a speed selector. The transmission includes a plurality of planetary transmission stages that couple the motor to the output spindle. The speed selector includes only one switch member that is slidably movable between three positions to cause the transmission to operate in a corresponding number of speed ratios.

Abstract: Traction planets and traction rings can be operationally coupled to a planetary gearset to provide a continuously variable transmission (CVT). The CVT can be used in a bicycle. In one embodiment, the CVT is mounted on the frame of the bicycle at a location forward of the rear wheel hub of the bicycle. In one embodiment, the CVT is mounted on and supported by members of the bicycle frame such that the CVT is coaxial with the crankshaft of the bicycle. The crankshaft is configured to drive elements of the planetary gearset, which are configured to operationally drive the traction rings and the traction planets. Inventive component and subassemblies for such a CVT are disclosed. A shifting mechanism includes a plurality of pivot arms arranged to pivot about the centers of the traction planets as a shift pin hub moves axially.

Abstract: Disclosed herein is a power transmission device for providing torque in a reverse direction and forward direction and for use in a vehicle having a power source. The device employs a pair of bevel gears slidably disposed on an output shaft to permit selective engagement of a forward or reverse direction of the output shaft.

Abstract: A hammer drill/driver with a motor having an output member, a planetary transmission, a clutch assembly and a clutch bypass. The planetary transmission, which includes a ring gear, receives rotary power from the output member and produces a rotary output. The clutch assembly has a clutch profile, which is coupled to the ring gear, and a first pin assembly having a first follower, a first pin member and a first spring that biases the first follower into contact with the clutch profile. The clutch bypass has a bypass profile, which is coupled to the ring gear, and second pin assembly having a second follower, a second pin member, a second spring, which biases the second follower away from the bypass profile, and a third spring, which biases the second follower away from the second pin member. A method for operation of a hammer drill/driver is also provided.

Abstract: An electromagnetic selection device of a two-stage planetary gear set (1) having one input shaft (2) and one output shaft (3), one sun gear (8), one ring gear (11), one planet carrier (10) with planetary gears (9), one transmission housing (6) and one sliding sleeve (14) for switching one first gear in which the ring gear (11) can be coupled with the housing (6) and one second gear in which the ring gear (11) can be coupled with the sun gear (8), the sliding sleeve (14) being movable by way of one electromagnet consisting of magnet coils (22, 23) and one armature (24). It is proposed that the armature (24) be situated rotatably, but axially fixed, upon the sliding sleeve (14).