A transmission system of a decelerating mechanism includes a planetary gear unit including a sun gear being adjacent to the first surface and a planetary gear set and a holder including a carrier and several planetary shaft units rotatably disposed on the carrier. The carrier has a first surface and a second surface that face opposite directions. The planetary gear set has several first gears being adjacent to the first surface, respectively fitting around the planetary shaft units, and meshing with the sun gear, several second gears being adjacent to the second surface and being coaxially disposed with the first gears, and an internal gear ring meshing with the second gears. By respectively arranging the first gears and the second gears on two opposite sides of the carrier, mutual interference therebetween while turning could be avoided, and an overall volume of the transmission system could be reduced.

A buffer gear set mounted between a motor and a transmission assembly of a power tool is disclosed to include an outer ring seat and an inner ring seat coaxially arranged together, a planetary gear set mounted in the outer ring seat, accommodation spaces defined between the outer ring seat and the inner ring seat, and buffer members respectively accommodated in the accommodation spaces. When an external force is applied between the outer ring seat and the inner ring seat, the buffer members absorb a part of the external force transmitted between the outer ring seat and the inner ring seat, thereby reducing the impact of the overall power tool, achieving shock absorption, reducing noise and improving work efficiency and quality.

A gear transmission device includes a frame, a sun gear, a driven gear, a planetary gear, a contact member, and a guide. The guide guides the contact member as described below. When the planetary gear is at a meshing position, a first tooth portion and a first contact portion of the contact member are away from the planetary gear. When the planetary gear is at a farthest position, the first contact portion is in contact with the planetary gear and the first tooth portion is away from the planetary gear. When the planetary gear is between the meshing position and the farthest position, the first tooth portion moves in mesh with the planetary gear in a direction opposite to a moving direction of the planetary gear around the sun gear, and the first contact portion is switched between a state in contact with the planetary gear and a state away from the planetary gear.

A method operates a drive train for driving a working machine with variable rotation speed. The method includes running up the electric drive machine from a standstill with evacuated hydrodynamic rotation speed/torque converter to a predefined value which indirectly characterizes the operating mode of the drive machine. Simultaneously with reaching the predefined value which indirectly characterizes the operating mode of the drive machine or with a temporal offset after reaching this, filling the hydrodynamic rotation speed/torque converter and driving the turbine vane wheel. Thereafter, the third element of the planetary gear mechanism is driven with a rotation speed which results from a superposition, defined by the planetary gear mechanism, of the rotation speed of the first element of the planetary gear mechanism connected to the electric drive machine and the rotation speed of the second element of the planetary gear mechanism which is indirectly connected to the turbine wheel.

A power split and creep drive system for street sweeper or like specialty vehicle having a single engine is disclosed. The system intends to retrofit and convert on-highway truck chassis into specialty vehicles capable of performing work function and moving at creeping speed, such as a street sweeper. It includes a hydraulic work circuit or power-take-off (PTO) port, a planetary gear set, a hydraulic system comprising pumps and motors to drive the working devices and balance the demand between propulsion and work function such as sweeping. The planetary gear set includes an input shaft connecting to a transmission output shaft of the chassis, a first output shaft connecting to a hydraulic machine, and a second output shaft to vehicle propulsion drive shaft.

Three variable gear assemblies called Transgears, an electro-mechanical rotary frequency converter, and a variable overlap generator (VOG), may be used independently and together to provide constant frequency and voltage output power from variable input water flow and wind speed. Two sets of three variable spur/helical gear assemblies of sun and planetary gear sets are combined in a mechanical three variable control to form an assembly called a Hummingbird. A Hummingbird control may comprise a constant speed control motor and a constant speed generator to produce required constant frequency and voltage. In order to provide a constant control input, a constant rotational speed can be produced by a control motor. Once a constant rotational speed is produced, a constant electric frequency and constant AC voltage can be produced by the variable output generator.

A control system for a hybrid vehicle configured to prevent a reduction in the purifying performance of the catalyst in a predetermined operating mode. An operating mode of the hybrid vehicle can be selected from a first hybrid vehicle mode, a second hybrid vehicle mode, and a fixed mode. A controller that is configured to restrict a shifting operation between the first hybrid vehicle mode and the second hybrid vehicle mode via the fixed mode, when the purifying device is being warmed or the purifying device has to be warmed.

A gear transmission device includes a frame, a sun gear, a driven gear, a planetary gear, a contact member, and a guide. The guide guides the contact member as described below. When the planetary gear is at a meshing position, a first tooth portion and a first contact portion of the contact member are away from the planetary gear. When the planetary gear is at a farthest position, the first contact portion is in contact with the planetary gear and the first tooth portion is away from the planetary gear. When the planetary gear is between the meshing position and the farthest position, the first tooth portion moves in mesh with the planetary gear in a direction opposite to a moving direction of the planetary gear around the sun gear, and the first contact portion is switched between a state in contact with the planetary gear and a state away from the planetary gear.

An electric drive axle of a vehicle includes an electric motor having an output shaft. At least one of a gear and a planetary gear set is operably connected to the output shaft of the electric motor. The at least one of the gear and the planetary gear set is operably connected to a differential configured to transfer torque to two axle half shafts of the vehicle. At least one clutch configured to facilitate a plurality of gear ratios between the electric motor and the differential.

A portion of ankle movement can be harnessed into stored energy that can be released for various purposes, such as to assist in movement or to charge a battery. This harnessing can be achieved in various manners. In one example manner, an offset pulley component can transfer ankle movement to a generator in a shoe insole. In another example manner, a slider can cause a brace arch to match an ankle arch such that the movement is appropriately harnessed.