A driving force transmission mechanism includes a worm gear unit as a brake disposed between a driving motor and an electrically driven input gear, and is configured such that when a driving force is applied from the driving motor to the electrically driven input gear through the worm gear unit, an outer ring which rotates together with the electrically driven input gear becomes locked to an inner ring through rollers so that the driving force is transmitted to an output gear, which rotates together with the inner ring, and when a driving force is applied to a manually driven input shaft, the outer ring and the inner ring are unlocked from each other by an unlocking piece which rotates together with the manually driven input shaft, and thereafter, the driving force is transmitted to the inner ring and the output shaft.

A planetary gear train for a wind power plant includes a planetary stage rotating in a gear train housing, a spur gear stage downstream of the planetary stage, a sun wheel shaft which is non-rotatably connected to a sun wheel of the planetary gear stage, and a hollow shaft which is coaxially surrounded by a spur gear of the spur gear stage and is non-rotatably connected to the spur gear. The sun wheel shaft and the hollow shaft are non-rotatably connected to each other by a toothed coupling, with an outer toothing of the sun wheel shaft meshing with an inner toothing of the hollow shaft. The planetary gear train includes oil-guide ducts which produce a connection between an oil inlet connected to the gear train housing, on the one hand, and the toothed coupling and the axial contact surface, on the other hand.

Drive systems or powertrains including transmissions for electric and hybrid electric vehicles are provided. In some embodiments, dynamic, 2-position linear motor, one-way clutches are provided. In other embodiments, 3-position linear motor, 2-way clutches are provided. In a fixed speed ratio operating mode of an electric vehicle powertrain, torque values for two electric motors are determined by control logic to optimize overall efficiency of the motors. In a fixed torque ratio operating mode of the powertrain, speed values for the two motors are determined to optimize overall efficiency. A hybrid electric powertrain of at least one embodiment uses the optimized electric vehicle powertrain, an engine and the one-way and 2-way clutches to obtain a highly optimized hybrid powertrain.

A crankshaft system is provided. The crankshaft has a main journal, a rod journal rotates around the main journal, a planet gear is attached to the rod journal and can rotate around the rod journal, the rotation of the planet gear is constrained by a constraining gear, the teeth number of the constraining gear is integer k times of the teeth number of the planet gear, a crankpin is mounted on the planet gear, one end of a connecting rod of a piston is attached to the crankpin, the constraining gear is a ring gear or a sun gear, the trajectory of the crankpin is noncircular. The combustion chamber volume keeps constant from 0° ATDC to 14° ATDC, or the minimum combustion chamber volume extends from TDC to 14° ATDC or after 14° ATDC.

The gear assembly can be operatively connected on the input side to a drive machine and on the output side preferably to an actuating element of the electrically operable brake and comprises at least one gear stage. The at least one gear stage comprises at least two intermeshing gear wheels, of which at least one gear wheel is rotatably mounted on an axle element by engagement of the axle element in a receptacle of the at least one gear wheel. The receptacle and the axle element have mutually corresponding peripheral surfaces, of which, in the axial direction, at least one peripheral surface has an outwardly curved contour and the other peripheral surface has a contour designed such that the peripheral surfaces roll against one another on the contours in order to bring the at least one gear wheel and the axle element into an oblique position relative to one another.

The gear assembly can be operatively connected on the input side to a drive machine and on the output side preferably to an actuating element of the electrically operable brake and comprises at least one gear stage. The at least one gear stage comprises at least two intermeshing gear wheels, of which at least one gear wheel is rotatably mounted on an axle element by engagement of the axle element in a receptacle of the at least one gear wheel. The receptacle and the axle element have mutually corresponding peripheral surfaces, of which, in the axial direction, at least one peripheral surface has an outwardly curved contour and the other peripheral surface has a contour designed such that the peripheral surfaces roll against one another on the contours in order to bring the at least one gear wheel and the axle element into an oblique position relative to one another.

An epicyclic reduction gear for a turbomachine includes a sun gear that is rotatable about a first axis and a ring gear surrounding the sun gear and also rotatable about the first axis. The ring gear is secured to a ring gear carrier that rotates a fan shaft. At least one planet gear is rotatable about a second axis and is meshed with the sun gear and the ring gear. The planet gear is guided in rotation about the second axis relative to a bearing of the planet carrier. A piece of equipment comprising a rotor. The piece of equipment is attached to the bearing of the planet carrier and has a rotor rotated by the ring gear carrier.

A crankshaft system is provided. The crankshaft has a main journal, a rod journal rotates around the main journal, a planet gear is attached to the rod journal and can rotate around the rod journal, the rotation of the planet gear is constrained by a constraining gear, the teeth number of the constraining gear is integer k times of the teeth number of the planet gear, a crankpin is mounted on the planet gear, one end of a connecting rod of a piston is attached to the crankpin, the constraining gear is a ring gear or a sun gear, the trajectory of the crankpin is noncircular. The combustion chamber volume keeps constant from 0° ATDC to 14° ATDC, or the minimum combustion chamber volume extends from TDC to 14° ATDC or after 14° ATDC.

An epicyclic reduction gear for a turbomachine includes a sun gear that is rotatable about a first axis and a ring gear surrounding the sun gear and also rotatable about the first axis. The ring gear is secured to a ring gear carrier that rotates a fan shaft. At least one planet gear is rotatable about a second axis and is meshed with the sun gear and the ring gear. The planet gear is guided in rotation about the second axis relative to a bearing of the planet carrier. A piece of equipment comprising a rotor. The piece of equipment is attached to the bearing of the planet carrier and has a rotor rotated by the ring gear carrier.

A device for driving an integrated generator from an accessories relay box of a turbomachine. The device includes first and second electric motors arranged to transfer electric power from one to the other, one or more controllers configured for controlling said electric motors, and an epicyclic reduction gear train. The gear train includes a first element intended to be coupled to the accessories relay box, a second element intended to be coupled to the generator, and a third element driven to rotate by said first electric motor. The control means are configured to modify the speed of rotation of the third element in such a way that the second element is driven to rotate at a constant speed.