Abstract: A gas turbine engine according to an example of the present disclosure includes a propulsor section including a propulsor supported on a propulsor shaft, a turbine section including a turbine shaft, a compressor section having a plurality of compressor hubs with blades driven by the turbine shaft about an engine axis, and an epicyclic gear train interconnecting the propulsor shaft and the turbine shaft. The epicyclic gear train includes a sun gear coupled to the turbine shaft, intermediary gears arranged circumferentially about and meshing with the sun gear, a carrier and a ring gear including first and second portions. The first and second portions have axially opposed faces abutting one another at a radial interface.

Abstract: The present disclosure discloses a coaxial electric drive axle and an automobile, the coaxial electric drive axle includes a motor, at least one transmission assembly, a main shaft, and a first half shaft and a second half shaft connected by a differential; each transmission assembly includes at least two sliding sleeve shifting mechanisms, at least one of the sliding sleeve shifting mechanisms is arranged on the housing of the differential, and at least one of the sliding sleeve shifting mechanisms is arranged on the main shaft; the motor, the main shaft, the first half shaft and the second half shaft have one same axis. The three modules are arranged coaxially, the structure layout is novel and compact, the power transmission chain is short, and the transmission efficiency is high.

Abstract: Gearboxes for aircraft gas turbine engines, in particular arrangements for journal bearings such gearboxes, and related methods of operating such gearboxes and gas turbine engines, including a gearbox for an aircraft gas turbine engine, the gearbox including: a sun gear; a plurality of planet gears surrounding and engaged with the sun gear; and a ring gear surrounding and engaged with the plurality of planet gears, each of the plurality of planet gears being rotatably mounted around a pin of a planet gear carrier with a journal bearing having an internal sliding surface on the planet gear and an external sliding surface on the pin.

Abstract: An electric drive module for an electrified vehicle includes first and second electric motors, first and second reduction assemblies and a driveline. The first electric motor has a first rotatable output. The second electric motor has a second rotatable output. The first electric motor has a lower output capacity than the second electric motor. The first reduction assembly is driven by the first rotatable output and includes a first reduction output that is coupled to the second electric motor. The second reduction assembly is driven by the second rotatable output of the second electric motor. The first reduction assembly and the second reduction assembly cooperate to provide a combined first effective reduction ratio driven by the first rotatable output and wherein the second reduction assembly provides a second effective reduction ratio driven by the second rotatable output, the first effective reduction ratio being higher than the second first effective reduction ratio.

Abstract: A gear device according to the disclosure includes an internal gear having a pin groove, a pin rotatably supported by the pin groove, an external gear oscillatorily rotating while its external tooth is engaging with the pin, and a speed reduction unit. The speed reduction unit decelerates a rotational driving force of an electric motor and transmits the decelerated rotational driving force to a rotating drive unit. The speed reducer includes a first reduction unit disposed on the input side and a second reduction unit disposed coaxially with the first reduction unit on the output side. A gap is formed between the external gear and the pin when the center of the pin groove, the center of the pin, and the tooth bottom of the external gear are aligned. The first gap in the first reduction unit is larger than the second gap in the second reduction unit.

Abstract: A wheel hub driving system, including a housing, an electric motor, two planetary gear sets and a wheel hub bearing. The wheel hub bearing has a middle axle and an outer ring, the middle axle is fixed relative to the housing, and both a primary sun gear and a secondary sun gear are sleeved around the periphery of the wheel hub bearing. A stator of the electric motor, a primary geared ring and a secondary geared ring are all fixed to the housing. A rotor of the electric motor is anti-torsionally connected to the primary sun gear. A primary planet carrier is anti-torsionally connected to the secondary sun gear, a secondary planet carrier is anti-torsionally connected to the outer ring and the outer ring is configured to be anti-torsionally connected to a wheel rim so as to transmit power from the electric motor to the wheel rim.

Abstract: An internal-meshing planetary gear device includes an internally toothed gear provided with internal teeth and is fixed to an outer ring. A planetary gear is provided with external teeth which partially mesh with the internal teeth. A plurality of internal pins is respectively inserted into a plurality of internal pin holes formed on the planetary gear revolve within the internal pin holes and rotate relative to the internally toothed gear. An inner ring includes a first inner ring and a second inner ring, which are opposite each other in a direction parallel to a rotation axis and have opposite surfaces that come in contact with each other. The first inner ring has a plurality of holding holes, through which the plurality of internal pins respectively penetrate in the direction parallel to the rotation axis. Each of the plurality of internal pins is held in the inner ring and is rotatable.

Abstract: A propulsion system includes a motor, the motor disposed at a center portion of the propulsion system, the motor further including a rotor shaft. The system includes a splitter gearbox coupled to the rotor shaft, the splitter gearbox further comprising at least one splitter output shaft. The system includes at least one continuously variable transmission (CVT), the CVT coupled to the splitter output shaft, the CVTs further including a driveshaft. The system includes at least one bevel gearbox, the bevel gearbox comprising a bevel gearbox input shaft and a bevel gearbox output shaft, the bevel gearbox input shaft disposed parallel to the horizontal plane and the bevel gearbox output shaft disposed at an angle to the bevel gearbox input shaft, wherein the bevel gearbox input shaft is coupled to the driveshaft. The system includes at least one propeller coupled to the bevel gearbox output shaft.

Abstract: There is provided a drive power transmitting mechanism that can transmit drive power losslessly and can be used in environments where silence is required. The drive power transmitting mechanism includes a rotor having a first outer circumferential surface and rotatable about a first rotational axis, a rotor having a second outer circumferential surface pressed against the first outer circumferential surface and rotatable about a second rotational axis due to a frictional force produced between the second outer circumferential surface and the first outer circumferential surface, a gear rotatable in unison with the rotor about the first rotational axis, and a gear rotatable in unison with the rotor about the second rotational axis, in which the gear and the gear are brought into mesh with each other when the second outer circumferential surface slips against the first outer circumferential surface.

Abstract: A speed reducer includes a sun gear, an internal gear, and a planetary gear meshing with the sun gear and the internal gear. The speed reducer includes two bearings disposed to sandwich the planetary gears in an axial direction. At least one of the two bearings is pressed against the planetary gears in an axial direction by the engaging members.

Abstract: A planetary drive includes static and freely rotating outer rings having different diameters, sun gear, and multiple planet gears disposed around the sun so that their axis of rotation is rotated relative to the drive axis, causing each planet to contact each ring at a point along its length. The sun contacts each planet at a point between its contact points with the rings, such that the force at the contact points is enough that the resulting traction can transmit torque with minimal backlash. A carrier supports the planets such that each can rotate about both its own axis and the drive axis. There may be involute teeth or other surface features on parts of the rings, planets, and sun. In a sun-less configuration, the drive is actuated by the carrier. In a single-stage version, the freely rotating ring is absent and output is obtained from rotation of the carrier.

Abstract: Systems, methods, and devices are provided for a turbine driven pump gearbox. A turbine engine may drive a primary shaft having gears. The gears may selectably engage with gears of a secondary shaft that drives a machine (e.g., pump). By changing which gears of the primary shaft engage with which gears of the secondary shaft, a gear ratio may be changed. A power takeoff device (e.g., a generator) may be connected to the primary shaft and may be operated in reverse as a motor to rotate, slow, stop, and/or reverse rotation of the primary shaft. Brakes may be associated with one or more of the primary and secondary shafts. The power takeoff device and one or more of the brakes may be controlled to shift engagement of the shafts between different positions, changing the gear ratio and/or disengaging the shafts from each other.

Abstract: A gear set arrangement (10) for a bicycle gearbox (400) includes a planetary assembly, a stationary component (24), a first and a second brake (B1, B2), and a first and a second freewheel clutch (F1, F2). One planetary gear set (12) of the planetary assembly includes a first rotary element, a second rotary element, and a third rotary element. The first rotary element is rotationally fixable on the stationary component (24) by the first brake (B1). The first rotary element is connectable to the output (36) by the first freewheel clutch (F1). The second rotary element is rotationally fixable on the stationary component (24) by the second brake (B2). The second rotary element is connectable to the output (36) by the second freewheel clutch (F2). The third rotary element is connected to the input (34) for conjoint rotation. The gear set arrangement (10) is configured to provide three ratios.

Abstract: An actuator for a control surface is provided. The actuator includes a frame, an electric motor, an epicyclic gear, a power-off brake, a power-on brake, and a unidirectional bearing. A sun gear is operably coupled to an output of the motor. A carrier is couplable to the control surface such that rotation of the carrier in a first direction transitions the control surface toward the deployed position and rotation of the carrier in a second direction transitions the control surface toward the stowed position. The power-off brake couples to the sun gear to ground the sun gear when deenergized. The power-on brake couples to the ring gear to ground the ring gear when energized. When the power-on brake is deenergized, the unidirectional bearing permits the ring gear to rotate in the second direction and prevents the ring gear from rotating in the first direction.

Abstract: The present invention is an electronic gear-shifting system with sound effects and display, adapted to be mounted on an electric motorcycle, and including an electronic shift unit, an electronic clutch unit, a throttle position sensor, correspondingly outputting a shift signal, a clutch signal and a throttle position signal according to the operation of the rider, a control unit receiving the aforementioned signals to determine a target gear position of the electric motorcycle and control a power motor of the electric motorcycle. The electric motorcycle converts the real speed of the power motor into a virtual speed through an algorithm and lets a dashboard and a sound effect controller of the electric motorcycle output according to the virtual speed. In addition to simulate the power performance of a general gear-shifting-type motorcycle, the electric vehicle also has visual and auditory variations.

Abstract: A mechanical part for an aircraft turbomachine is made of metal and includes at least one profiled surface configured to ensure an oil flow during operation. The surface has a hydrophobic and/or lipophobic coating or a surface texturing rendering the surface hydrophobic and/or lipophobic.

Abstract: An electric drive device includes a transmission with a first planetary gear set having a first element, a second element, and a third element. The transmission includes a second planetary gear set having a fourth element connected to the third element for conjoint rotation, a fifth element and a sixth element. A first output shaft is connected to the fifth element for conjoint rotation and a second output shaft is connected to the fourth element for conjoint rotation. A first electric machine has a first rotor that is or can be coupled to the sixth element such that torques provided by the first rotor can be introduced into the transmission via the sixth element.

Abstract: An electric drive system for a motor vehicle includes a first electric machine with a first rotor, a second electric machine with a second rotor, and a planetary transmission which has a first planetary gear set, a second planetary gear set, a first input shaft, a second input shaft, a first output shaft, and a output input shaft. The first input shaft introduces first torques originating from the first electric machine into the planetary transmission. The second input shaft introduces second torques originating from the second electric machine into the planetary transmission. The first output shaft discharges third torques from the planetary transmission. The second output shaft discharges fourth torques from the planetary transmission.

Abstract: An improvement to continuously variable transmissions whereby power is transmitted from a driver axle to a driven axle through a variable transmission mechanism. A plurality of unidirectional sprocket wheels positioned radially around a driver axle within a set of frustoconical members is provided so that the distance from the driver axle can be adjusted. The unidirectional sprocket wheels are connected by a chain to a similar driven axle portion. This low vibration, high torque capable transmission is superior to variable transmissions that rely on friction-based power transmissions that can slip during operation.

Abstract: An electrified vehicle includes a front axle, a rear axle, an engine, a pump, a battery, a first electric motor electrically coupled to the battery, a second electric motor electrically coupled to the battery and configured to drive at least one of the front axle or the rear axle, a first clutch positioned between the engine and the first electric motor, and a second clutch positioned between the first electric motor and the pump. With the first clutch engaged and the second clutch disengaged, the engine is configured to drive the first electric motor to generate electricity to charge the battery. With the first clutch disengaged and the second clutch engaged, the first electric motor is configured to drive the pump. With the first clutch engaged and the second clutch engaged, the engine is configured to drive the pump.