Abstract: A harmonic drive includes a rigid internal gear, a flexible external gear meshed with the rigid internal gear, and a wave generator abutted against the flexible external gear. Through a special parameter setting to design the outer peripheral edge of the wave generator in a surface of variable curvature, the contact area between the wave generator and the flexible external gear is increased to improve fretting wear, thereby enhancing transmission accuracy and reducing hysteresis error.

Abstract: A dual-clutch transmission includes a hydraulic system for actuating hydraulic cylinders of the clutches and the shifting elements. The hydraulic system has a pressure accumulator providing an accumulated pressure in the hydraulic system, and control valves actuatable by a control unit and respectively arranged in pressure lines routed to the hydraulic cylinders of the clutches to adjust the hydraulic pressure applied to the clutches. Pressure sensors associated with the control unit detect the hydraulic pressure. The control unit activates a pressure reduction mode when detecting a long vehicle downtime, and the accumulated pressure can be reduced in the pressure reduction mode, in which the control unit continuously opens the control valve associated with one clutch. Additionally, the pressure sensor associated with the first clutch together with the control unit is integrated into a control circuit in which the first pressure sensor assumes the detection of the actual accumulated pressure value.

Abstract: A device for driving an ancillary unit of an internal combustion engine includes the ancillary unit having a mechanical drive, joined to a first coupling section, and an electric drive having a rotor and a stator with windings. The rotor is joined to a second coupling section and non-rotatably to a shaft. The shaft is joined to a component of the ancillary unit to be driven. The rotor is movable axially along a lengthwise extension of the shaft and axially with respect to the shaft. The first and second coupling sections are movable relative to each other by means of the axial movement of the rotor so as to either join together or separate the mechanical drive and the rotor, the rotor being movable axially along the lengthwise extension of the shaft with respect to the shaft in such a way that an electric current flows through the windings.

Abstract: The system comprises an oil pump driven in conjunction with an output shaft of a transmission, a first oil path for supplying oil discharged from the oil pump to a lubrication system of the transmission, a second oil path arranged in parallel with the first oil path to guide the oil from the oil pump to a heat exchanger, and a valve inserted on an upstream side of the heat exchanger in the second oil path. The valve opens at a first set pressure to conduct the oil from the oil pump to the second oil path. The oil is supplied to the first oil path in a low vehicle speed area below the first set pressure, so that oil supply necessary for the lubrication system can be ensured. The oil is supplied to the second oil path in a high vehicle speed area over the first set pressure.

Abstract: A dual rotary cam may include a first rotating unit, a second rotating unit, a first rod, a second rod and a transmission device. The transmission device has an active gear, two connecting gears, and two passive gears. The active gear is driven by a motor to drive the connecting gears. A decelerating gear that is co-axially disposed with the connecting gear is used to connect the passive gears. The passive gears co-axially connect with the connecting portions of the first rod and second rod. The gear motion between the active gear, connecting gears, passive gears and decelerating gear can be arranged to adjust the gaps therebetween to achieve a goal of seamless transmission of the rotary cam.

Abstract: A lubricating structure for a reduction gear includes a catch tank for holding a part of lubricating oil which is held on the bottom part of a transaxle case and which is supplied, by being scooped up, to each portion to be lubricated, a first oil passage provided within the transaxle case and guiding lubricating oil, which has been scooped up by a first driven gear, to the catch tank and a second oil passage provided within the transaxle case so as to be displaced from the first oil passage in an axial direction relative to the case and guiding lubricating oil, which has been scooped up by a second driven gear, to the catch tank.

Abstract: A transmission gear synchronizer may include a sliding sleeve, a hub configured to be received within the sliding sleeve, and a blocker ring disposed adjacent the hub. The blocker ring may have a plurality of molded clutch teeth and a plurality of molded grooves extending axially along an inner surface of the blocker ring.

Abstract: A hybrid transmission for a vehicle may include an input shaft configured to receive a power of an engine transferred thereto, an input clutch configured to connect the input shaft to the engine or to intercept connection of the input shaft to the engine, a motor directly connected to the input shaft, a first output shaft and a second output shaft provided with a plurality of driven gears that are tooth-engaged with a plurality of drive gears installed on the input shaft to form a plurality of gear shift stages, and a power control device provided to switch the power of the engine that is transferred to the first output shaft or the second output shaft.

Abstract: A change-speed transmission for motor vehicles, in particular manual transmission, having a plurality of forward gears and, optionally, one reverse gear, includes at least one input shaft, an output shaft and, optionally, a layshaft, between which the idler gears, which can be shifted via synchronous clutches, and the fixed gears of the gearwheel sets are arranged. At least one of the has a two-part design and is mounted in the transmission housing with mutually different axes of rotation, an annular gear stage is functionally provided between the sub-shafts and includes a internally-toothed annular gear and an externally-toothed spur gear that meshes therewith, the sub-shaft which has the larger axial distance to the other shaft bearing gearwheels of the lower forward gears and, optionally, of the reverse gear.

Abstract: On an inner peripheral surface of an outer peripheral member 10, a recess 11 is formed to which a pipe spring 30 is fitted. On an outer peripheral surface of an inner peripheral member 20 arranged concentrically with and rotatable relatively to the outer peripheral member 10 on an inner peripheral side of the outer peripheral member 10, a cam surface 21 is formed which abuts against the pipe spring 30. The cam surface 21 protrudes in the radial direction as it is farther away in the circumferential direction of the outer peripheral member 10 from the point of contact with the pipe spring 30 in the state where no load is applied.

Abstract: A gear moving assembly includes: a tubular shaft having a hollow portion formed therein; a sliding unit including: a base disposed in the hollow portion of the shaft, and a plurality of sliders including respective rods that are disposed in the respective sliding channels to be slidable relative to the shaft in the longitudinal direction; a plurality of movable gears disposed around a circumferential surface of the shaft to be movable relative to the shaft in the longitudinal direction, and provided to correspond to the respective sliders; and a plurality of interlocking units configured to connect the sliders to the corresponding movable gears so that sliding of each of the sliders is independently interlocked with movement of the corresponding movable gear. A transmission includes the gear moving assembly.

Abstract: There is provided a transmission device comprising a rigid casing configured to be mounted perpendicularly on a pair of parallel rotatable driving and driven shafts. Annular driving and driven gears are provided in the casing. The annular driving gear is adapted for rotating simultaneously with the driving shaft, and is also adapted for forwarding rotational motion of the inner section to a transmission device. The annular driven gear is adapted for engaging and rotating simultaneously with the driving shaft and sliding over the same, and for forwarding to the inner section rotational motion received from the transmission device. The transmission device is rotatively connected to the annular driving and driven gears for transmitting rotational movement of the driving shaft to the driven shaft. There is also provided a portable boring-welding apparatus using this transmission device and a method for rotating a driven shaft using a parallel driving shaft.

Abstract: A shift arrangement for a motor vehicle transmission has a housing. At least two push rods are mounted on the housing so as to be movable in an axial direction between a neutral position and a shift position. The push rods can each be coupled to a shift clutch. At least two return rods are mounted on the housing. The return rods are each coupled to one of the push rods so that a push rod and the return rod associated therewith are moved in opposite axial directions. A shift cam of a shift member can be aligned with a push rod or with a return rod for the purpose of selecting, and can transmit a pushing force to a selected rod. A driving feature is arranged on the shift member and can transmit a pushing force in order to move an unselected rod into the neutral position.

Abstract: A double dog gear assembly having a hollow cylindrical body member extending along a longitudinal axis between a first gear face and a second gear face. A first set of elongated pin slots are formed in the hollow cylindrical body member and spiral in a first direction. A second set of elongated pin slots formed are also formed in the hollow cylindrical body member and spiral in a second direction, which is different than the first direction. A locking pin selectively engages one of the first and second set of elongated pin slots such that the gear assembly can be used in either a left or right installation.

Abstract: A transmission system (8) comprising at least one floating gear (14a, 16a, 18a) rotationally mounted upon a first shaft the system comprising a floating gear activation system for controlling torque transfer between the at least one floating gear (14a, 16a, 18a) and the first shaft (10), the gear activation system comprising a first device (28, 30) having a friction interface (28) for frictional engagement with a friction interface (30) disposed on a first side of the at least one floating gear (18a), and a second device (25, 26) having a locking interface (25) for an interpositional engagement with a locking interface (26) disposed on a second side, opposing the first side, of the at least one floating gear (18a), whereby the floating gear (18a) is rotationally coupleable to the first shaft (10) by the friction interface (28/30) and/or the locking interface (25/26).

Abstract: A driving force transfer device for an end-effector, the driving force transfer device comprising at least one double shaft member which separately receives driving forces generated from first and second driving means through first and second power transfer means and transfers the driving forces to an end-effector such that the end-effector has two rotational degrees of freedom.

Abstract: When a vehicle driver selects reverse while a vehicle is moving forward, a transmission controller applies friction shift elements within the transmission to create a partial tie-up condition to decelerate the vehicle. Once the vehicle slows below a threshold speed, the controller engages a selectable one way brake and releases some of the friction shift elements to engage a reverse gear ratio.

Abstract: A synchronization device for a manual transmission of a vehicle, including a synchronizer ring configured to synchronize rotation of a transmission gear and clutch hub. The synchronizer ring includes: a ring body having an annular shape; an axial protruding portion protruding from the ring body toward the clutch hub in an axial direction to set a size of an axial clearance between the ring body and the clutch hub; and a radial protruding portion protruding from the ring body toward the clutch hub in a radial direction intersecting the axial direction to set a size of a radial clearance to be formed between the ring body and the clutch hub. The ring body, the axial protruding portion, and the radial protruding portion are formed integrally by metal stamping.

Abstract: A predetermined transmission ratio of a direct coupling mechanism arranged in parallel to the continuously variable transmission and directly connects the input shaft and the output shaft to transmit rotation of the input shaft to the output shaft at that predetermined transmission ratio is set to the minimum transmission ratio of the continuously variable transmission, and the direct coupling mechanism is connected to the input shaft through a third clutch.

Abstract: A gearing system comprises a first rotational input, a second rotational input and a rotational output. The first rotational input and second rotational input may transmit a rotation to the rotational output, wherein one of the first rotational input and second rotational input is connected to the rotational output through a one way clutch, and wherein the other of the first rotational input and second rotational input is connected to the rotational output through an overrunning clutch, wherein said one way clutch and said overrunning clutch are rotationally coupled. The gearing system may be used in electric bicycles, but may also be used in other dual propulsion vehicles such as hybrid cars.