Abstract: A transmission has a three input torque-transmitting mechanism, such as friction clutches, to achieve torque flow through a countershaft gearing arrangement. The transmission includes an input member, an output member, an input clutch assembly having three input clutches and a countershaft gearing arrangement. The countershaft gearing arrangement is operatively connected with the input clutch assembly and includes: co-planar intermeshing gear sets, first and second countershafts, first, second and third intermediate input shafts.

Abstract: An automated manual transmission may include a hollow input shaft connected to a first clutch and a second clutch so as to be selectively interruptible and selectively receive power from the first or second clutch. The transmission may also include an output shaft provided with a first plurality of shift gears, and an idler shaft provided with a second plurality of shift gears to receive power from the first clutch and to shift gears, with a first idler gear provided on the idler shaft. The transmission may further include a second idler gear connecting the first idler gear to a shift gear in the first plurality of shift gears provided on the output shaft to receive power from the second clutch.

Abstract: A hollow-type strain wave gearing unit (1) has a sealing member (14) for sealing a gap (15) opening to the inner peripheral surface of a unit hollow portion (5) passing through in an axis (1a) direction. The gap (15) includes a gap section (15b) between an outer peripheral side end race (48b) on the wave generator side and a boss side end face (108), both faces opposing each other in the axis (1a) direction, and the sealing member (14) is assembled therein. The gap section (15b) is formed in a state partially entering the inside of the inner ring (11b) of the second bearing (11) supporting the wave generator (4). It is possible to realize a hollow-type strain wave gearing unit with a sealing mechanism that is suitable for increasing the inner diameter of the unit hollow portion and for reducing the unit axial length.

Abstract: A wave generator of a strain wave gearing has a rigid plug and a needle roller bearing mounted on the plug external peripheral surface. The plug external peripheral surface has a retainer engaging part for engaging with a retainer that would move in an axis line direction and for restricting the movement thereof along the axis line direction. The retainer has an outer ring engaging part for engaging with an outer ring that would move in the axis line direction and for restricting the movement thereof along the axis line direction. The movements of the retainer and the outer ring can be restricted without providing a separate member. A wave generator of a strain way gearing can be realized, which is provided with a roller bearing capable of restricting the movement of the outer ring with a simple structure.

Abstract: A pair of toothed wheels that mesh with each other includes a plateau portion. The surface of the plateau portion is a plateau-structure surface formed on each tooth face of each of the pair of the toothed wheels, with peak portions of convexities, out of a plurality of concavities and the convexities provided on the each tooth face, being flat. A reduced valley depth Rvk of the plateau portion of one of the pair of the toothed wheels as defined in JISB0671-2 is greater than the reduced valley depth Rvk of the plateau portion of the other of the pair of the toothed wheels. The area occupied by the concavities in the plateau portion of the one of the toothed wheels is larger than the area occupied by the concavities in the plateau portion of the other toothed wheel.

Abstract: A power transmission unit including a first clutch device that selectively enables and disables a torque transmitting route from an input shaft to an output shaft via a first gear train to transmit torque therethrough, a dog clutch that switches the torque transmitting route from the input shaft to the output shaft between a continuously variable speed change route in which torque is transmitted through a continuously variable transmission and a reverse route in which torque is transmitted through a second gear train, and a second clutch device that selectively enables and disables both of the continuously variable speed change route and the reverse route to transmit torque to the input shaft or the output shaft. The first clutch device and the second clutch device are separately disposed on any of the input shaft and the output shaft in a manner to be situated at different axial positions.

Abstract: A selectively disconnectable and reconnectable harmonic drive assembly of a rotary actuator is provided. The drive assembly includes a harmonic wave generator configured to rotate and disconnect and reconnect a harmonic drive of the actuator by moving radially inward to allow the disconnect of a flex spline from a ring gear and radially outward to allow the reconnect of the flex spline to the ring gear. With respect to the disconnect, roller bearings and a disconnect spring are configured to push the wave generator axially when a solenoid is activated, allowing the roller bearings to move radially inward. This movement releases an outward force on the flex spline, disconnecting the flex spline from the ring gear. The solenoid is deactivated so that a ball-lock sleeve is forced axially by a ball-lock-sleeve-return spring, and ball bearings are forced radially into a groove in a locked “disconnect” position.

Abstract: A power transmission unit for a vehicle is provided. In the power transmission unit, a continuously variable transmission to alter a speed ratio continuously is disposed between an input shaft to which a torque of a prime mover is inputted and an output shaft rotated by the torque transmitted from the input shaft. A first gear train that transmits the torque to propel the vehicle in the forward direction is arranged parallel to a second gear train that transmits the torque to propelling the vehicle backwardly.

Abstract: An improved strain wave drive system employs an outer circular spline part and an outer dynamic spline part spaced apart by a gap from each other in a widthwise (axial) direction and each having a array of internally facing gear teeth, a two-part inner flexible spline (flexspline) having two different sets of externally facing toothed projections offset by a gap from each other across a width extending in a widthwise (axial) direction, a wave generator coupled to the central rotor or shaft for generating a wave impulse that displaces the inner flexspline toothed projections into mesh with those of the outer circular spline part and an array of roller bearings supporting an inner surface across the width of the flexspline in rolling line bearing contact.

Abstract: A front differential for a four wheel drive vehicle including a pinion assembly with first and second pinions that are engaged with a ring gear assembly with first and second ring gears. The first pinion and first ring gear combination are rotatable independent from the second pinion and second ring gear combination, thus permitting one to rotate relative to the other. The first pinion and first ring gear combination are adapted to rotate one driven shaft, and the second pinion and second ring gear combination are adapted to rotate the other driven shaft. A bi-directional overrunning clutch assembly is engaged with an end of the drive shaft and includes one set of rolls located adjacent to the first pinion shaft, and another set of rolls located adjacent to the second pinion shaft. The clutch assembly control torque transmission between the pinion shafts and the drive shaft.

Abstract: A transmission system for a hybrid vehicle includes a primary input shaft for receiving drive from a primary vehicle drive motor, such as an internal combustion engine. A secondary input shaft receives drive from a secondary vehicle drive motor, such as an electric motor. An output shaft of the system is connected to drive a final drive unit. A multi-speed gearbox is provided to connect the primary input shaft to the output shaft at one of a plurality of gear ratios. An input selection mechanism, in a first mode, connects the secondary input shaft to drive the output shaft and, in a second mode, connects the secondary input shaft to drive the primary input shaft. A clutch may be provided that can selectively connect or disconnect drive between the primary drive motor and the gearbox.

Abstract: A method of controlling movement of an actuator fork and attached synchronizer sleeve of a transmission through a pre-synchronization phase of a synchronization event at a pre-synchronization fork velocity below a breakaway velocity such that a strut is retained to the sleeve by a ball plunger for the duration of the pre-synchronization phase. A method of adjusting one of a pressure signal and a flow signal to an actuator piston to control movement of the actuator fork includes moving the fork from an initial disengaged position through a pre-synchronization phase of a synchronization event by controlling one of a pre-synchronization fluid pressure value and flow value, where the controlled pre-synchronization fluid value is less than a threshold value corresponding to a breakaway force of a ball plunger configured to selectively retain a strut assembly to a synchronizer sleeve operatively attached to the actuator fork.

Abstract: A harmonic drive assembly with selective disconnect includes a motor with a motor drive shaft, a harmonic drive operatively coupled to the motor drive shaft, and a wave generator operatively coupled to the motor drive shaft and a flex gear of the harmonic drive. Also included is a ring gear of the harmonic drive operatively coupled to the flex gear with a plurality of ring gear teeth configured to mesh with a plurality of flex gear teeth. Further included is an output shaft operatively coupled to the harmonic drive. Yet further included is a retracting mechanism configured to selectively retract the motor drive shaft and the wave generator to decouple the motor drive shaft and the wave generator from the harmonic drive, wherein a clearance between the ring gear teeth and the flex gear teeth is established upon retraction of the motor drive shaft and the wave generator.

Abstract: A drivetrain transmits a first drive force from a transmission including a motor to a first axle and a second axle. This drivetrain is comprised of: a first drivetrain section drivingly coupled with the first axle to steadily transmit the first drive force to the first axle; a second drivetrain section drivingly coupled with the second axle; an intermediate train section interposed between the first drivetrain section and the second drive section, the intermediate train section being capable of transmitting a part of the first drive force to the second drive section; an electric motor drivingly coupled with the intermediate train section to give a second drive force to the intermediate train section; a first clutch disconnectably connecting the first drivetrain section with the intermediate train section; and a second clutch disconnectably connecting the intermediate train section with the second drivetrain section.

Abstract: A shifting assembly for a vehicular transmission includes a shift rail having a yoke coupled thereto. A lever may be provided having portions forming an L-shaped slot. The yoke may engage the lever through the slot. The shift rail may be configured to shift the transmission into a forward gear ratio and a reverse gear ratio. The shift rail may be configured to translate along a primary axis in a first direction and in an opposite second direction. A shift fork may be coupled to the shift rail, which is configured to cause the transmission to shift into a forward gear ratio when the shift rail is translated in the first direction to a forward gear engagement position. The yoke may be configured to cause the transmission to shift into a reverse gear ratio when the shift rail is translated in the second direction to a reverse gear engagement position.

Abstract: A transmission for a vehicle may include first and second input shafts, first and second output shafts, a first driving gear fixed to the second input shaft, a first medium gear engaged with the first driving gear and a second medium gear integrally connected to the first medium gear at least temporarily, and rotatably installed on the second output shaft, a third medium gear engaged with the second medium gear and rotatably installed on the second input shaft, a first stage driven gear engaged with the third medium gear and rotatably installed on the first output shaft, a second stage driving gear selectively rotatable with the first output shaft, a second stage driven gear installed on the second output shaft and engaged with the second stage driving gear, and an auxiliary clutch for selectively connecting the second stage driving gear to the first input shaft.

Abstract: A power transfer assembly is described for power transmission from a power source to one or more rotating components. The power transfer assembly includes a power source capable of providing torque output, a first one-way clutch configured to receive torque input from the power source, and a second one-way clutch configured to receive torque input from the power source. The first one-way clutch is configured to transmit at least a first portion of the received torque input to a first half-axle. The second one-way clutch is configured to transmit at least a second portion of the received torque input to a second half-axle.

Abstract: A transfer case for transferring a driving torque of a driving unit of a motor vehicle to a first axle and a second axle of the motor vehicle. The transfer case includes a housing, an input shaft allocated to the driving unit, a first driven shaft allocated to the first axle, and a second driven shaft allocated to the second axle and offset parallel to the input shaft. The transfer case further includes an offset drive for transmitting driving torque from the input shaft to the second driven shaft. The offset drive comprises a gear wheel coaxial to the input shaft or to the driven shaft. The gear wheel is rotatably mounted on a section of the housing.

Abstract: A vehicle transmission device provides power transmission and speed switch for the operation demands of the vehicle to advance. The transmission device includes a driving shaft or an input shaft connected with a power source. The input shaft is provided with an input gear set and spring-like members disposed inside the input gear set. An output gear set is provided to mesh with the input gear set. A transmission control mechanism is disposed on the input shaft for the input gear set to transmit a power to the output gear set and an output shaft to output the power to drive the vehicle. The present invention can enhance the power, torsion and speed of the vehicle.

Abstract: A variable ratio gearbox is combined with a drive motor and an interactive control system. A coaxial shaft connects to a differential gear set to power an output shaft. The transmission has a drive shaft with an inner shaft and an outer shaft. A friction disk nonrotatably mounts to said outer shaft and a shifter connected to the friction disk moves the friction disk along the outer shaft. At least two cones engage the periphery of the friction disk and a differential gear set combines the rotation of the inner and outer shaft.