Abstract: A combination gear subassembly (50, 60, 90, or 130) for mounting pairs of combination gears (38, 70, 100, or 120) in a differential assembly having cross axis compound planetary gearing. The combination gear subassemblies are made up of a pair of combination gears together with a pair of journal plates (52, 62, or 92) each having a pair of bearing surfaces (54, 64, or 98) for receiving journals (46, 72, 102, or 122) which project from opposite ends of the combination gears. The combination gear subassemblies are mounted in guide slots (32, 66, or 116) formed in pedestals (28, 84 or 112) which connect end portions (12) of housing (10).
Abstract: The disclosure describes a hydraulic power transmission comprising a torque converter of which a pump impeller is adapted to be connected to an output shaft of an engine; a fluid coupling of the pump impeller is adapted to be connected to the output shaft of the engine; an intermediate shaft is connected to a turbine runner of the torque converter; an output shaft is connected to a turbine runner of the fluid coupling; a one-way clutch connects the intermediate shaft to the output shaft and is operable to transmit the torque only fron the intermediate shaft to the output shaft; and a control mechanism for controlling the fluid coupling to operate only when the rotation speed of the output shaft exceeds a predetermined value.
Abstract: In an automobile which employs an engine the output of which varies with the amount of operation applied to the operating terminal of the engine and a continuously variable transmission having a reduction ratio which can be rendered infinite or close to infinity when the automobile is started, and acceleration control system comprising a torque detector for detecting the output torque of the transmission, and a corrector for correcting the amount of operation to be applied to the operating terminal in such a manner that when the torque detector detects the output torque of the engine having exceeded a predetermined allowable maximum level, the engine output is reduced so as to offset the excessive amount of torque.
Abstract: A method for indicating a running condition of a vehicle having an engine and a manual transmission generates a direction of an up-shift operation according to detected results of the throttle position, the gear position, the vehicle speed, and the engine load. The direction of the up-shift operation is basically generated when the throttle valve is open, a medium speed gear is engaged, and the vehicle speed is above a predetermined level. Besides, the generation of the direction of the up-shift operation is stopped when the load of the engine suitably detected by the pressure in the intake manifold is in a medium load range.
Abstract: In combination with a power transmission, a power transfer device comprises a first shaft rotatably mounted within a housing and having an input end for connection to an output shaft of the transmission and an output end for drive connection to a pair of rear-wheel axles, a second shaft rotatably mounted within the housing in parallel with the first shaft for drive connection to a pair of front-wheel axles, a drive gear rotatably mounted on the first shaft and connectable to the first shaft, a driven gear rotatably mounted on the second shaft and connectable to the second shaft, the driven gear being drivingly connected to the drive gear, and a pair of sleeves each mounted on the first and second shafts and shiftable between a first position where both the clutch sleeves are retained to connect the drive and driven gears to the first and second shafts and a second position where both the clutch sleeves are retained to disconnect the drive and driven gears from the first and second shafts, whereby both the dri
Abstract: A parking mechanism for a transmission, comprising: a coupling member engageable simultaneously with two gears for different gear positions of the transmission when a change device provided besides a driver's seat is set in a "parking" position.
Abstract: An automatic transmission has lower side and higher side friction engagement devices, with the lower side one being engaged and the higher side one being disengaged when a lower speed stage is engaged, while the lower side one is disengaged and the higher side one is engaged when the speed stage one higher than that lower speed stage is engaged. A control device for the transmission includes a shift valve for switching actuating fluid pressure between the lower side and the higher side friction engagement device and for draining the other one thereof, to provide the lower or the higher speed stage. An upshift smoothing valve is interposed in the drain path for the lower side friction engagement device for providing a higher flow resistance when a value representing engine output is relatively high and for providing a lower flow resistance when the value representing engine output is relatively low.
Abstract: A thirteen-speed driving wheel which includes a pedal drive shaft on the axis of the wheel, pedal crank arms, and vehicle interface fittings on both sides for mounting in pedal powered vehicles to replace the chain and derailleur system used in conventional bicycles. The driving wheel is particularly well suited for use in front wheel drive recumbent bicycles and tricycles and, because the driving gears are all enclosed within the wheel hub, provides a compact, low maintenance alternative to conventional chain drives.
Abstract: In a manual power transmission for automotive vehicles, a gear noise suppressor and vibration isolator includes elastomeric sleeve preferably fitted within several holes through the thickness of the gear wheel, angularly spaced about the axis of the wheel. The spacers define a space within which a metal sleeve is inserted and the sleeve defines a central bore through which a pin is fitted. A load plate located adjacent an end face of gear wheel has teeth formed on its outer periphery which are adapted to mesh with the teeth of an input pinion with which the gear wheel is continuously engaged. Pins having a headed end that abuts the load plate hold the plate in contact with the elastomeric sleeves and prevent contact of the load plate against the gear wheel. The sleeves resiliently deflect and permit engagement of the load plate and gear wheel with the drive pinion.
Abstract: In a gear mounting having a spindle (10,16,31) extending generally normal to a carrier (5,13,29), the spindle is cantilevered back from the outer end of a tie-bolt (4,14,30) and is permitted limited axial excursions to adapt itself to the tooth loading. It is particularly suited to mounting planets in an epicyclic gear. The outer end of the spindle is clamped between the head of the tie-bolt and a tubular compression member (9,15,32) of lesser axial extent than the spindle, and between that member and the carrier there is a bush (12,17,33), also in the compression chain. The tubular member is more flexible than the bush and the bolt can also flex to allow the axial excursions. The tubular member may be integral with the bush or separate from it, but in either case the geometry of the various components can be such that easy tolerances are permissible to facilitate assembly. However, when the tie-bolt is tensioned distortions occur to close radial clearances and centralize the components.
Abstract: A system of lubricated gearing illustrated in the context of a motorcycle transmission. A lubricant vessel is provided to partially enclose the lower portion of the drive gear to deliver additional lubricant thereto. Walls extend radially outwardly adjacent to the drive gear to retain lubricant within the meshing area of the gears, reducing gear noise and impact shock between meshing gear teeth.
Abstract: In a vehicle automatic transmission system employing a gear-type transmission, the system has a selector having a drive position for allowing automatic gear-change operation over a plurality of gear positions and a gear-holding position provided adjacent to the drive position, and the gear-change operation is limited below a gear position or is fixed at the gear position which is decided the actual gear position at the time a operation lever of the selector is moved from the drive position and the gear-holding position, whereby the system enables gear holding in each of the gear position by only providing the selector one with additional position.
Abstract: A continuously-variable ratio automotive transmission, especially of the toroidal race rolling-traction type, in which mechanism comprising a clutch, a brake and two epicyclics--a reversing train and a mixing train--is interposed between the ratio-varying unit and the output member of the transmission as a whole. By operation of the clutch and the brake the elements within the mechanism may be arranged in two different combinations whereby the transmission may operate in first and second "regimes", one or other of which will offer efficient transmission throughout the entire operating range of the source of automotive power. The invention lies in a particular choice of the two different combinations resulting firstly in a transmission notably short in axial length.
November 19, 1984
Date of Patent:
September 8, 1987
National Research Development Corporation
Abstract: A mechanism for the selection of various operational ranges of an infinitely variable belt-drive transmission for a vehicle, the mechanism having a shift lever shiftable along a straight line. The transmission has a drive range and a high engine speed drive range which is provided to downshift the transmission during the drive of the vehicle in the drive range. The mechanism is provided with a cam plate responsive to the operation of the selector lever and having a cam groove for providing the drive range and the high engine speed drive range under the drive range state.
Abstract: Drawworks transmission shifting apparatus is described that provides an arrangement of control valves, cylinders, clutches and brakes which permit the rig operator to shift the drawworks transmission into the desired setting and to lock the transmission in those positions by the use of remotely controlled pneumatically powered cylinders.
Abstract: Method and apparatus for controlling a continuously variable transmission operatively connecting an engine and drive wheels of a vehicle, wherein a speed ratio of the transmission is controlled such that an actual engine speed coincides with a target engine speed.
Abstract: A fluid-powered helical actuator including a cylindrical body; a rotatable output member supported for rotation relative to the body and connectable to an external device; first and second independently rotatable sleeves reciprocally mounted within the body; a piston reciprocally mounted within the body for application of fluid pressure to one or the other opposing sides thereof to produce axial movement, the piston operatively engages at least one or the other of the sleeves to axially move the sleeves in response to axial movement of the piston; and torque-transmitting elements for transmitting torque between the first sleeve and the body, between the first sleeve and the output member, between the second sleeve and the output member, and between the second sleeve and the body.
Abstract: A spring drive mechanism has a spiral spring positioned in a spring encasement as a power source. Its ends are connected, on the one hand, to a spring encasement gear and, on the other hand, to a spring shaft gear. For the purpose of winding up the spring, the spring encasement gear is in mesh with a first drive pinion and the spring shaft gear is in mesh with a second drive pinion. These drive pinions has a stress-free connection to a wind down/wind up shaft across a unidirectional torque transmitters which each permits rotation in one direction; the directions being opposite. A reverse pinion has one pinion sprocket is mesh with the spring shaft gear. The other pinion sprocket is in mesh with the drive pinion in the wind up position. In this position, the spring drive mechanism is blocked in such a way that the tensioned driving spring cannot release.
Abstract: A method of controlling a synchromesh type automatic transmission of a vehicle such as an automobile, including the steps of releasing a clutch for connecting an engine and the transmission in response to a speed change command, shifting the transmission from one speed position to a neutral position, shifting the transmission from the neutral position to a subsequent speed position, and applying the clutch. The double-clutching operation is conducted if a load upon synchronization during the speed changing operation exceeds a predetermined level, to once apply the clutch and subsequently release the clutch again while the transmission is in the neutral position. Thus, the synchronization load can be dropped to prevent any so-called "under-synchronization" in the transmission. The synchronization load is detected in terms of the difference between the r.p.m. of the input shaft of the transmission and the product of the vehicle speed or the r.p.m. of the output shaft of the transmission and the reduction ratio.
Abstract: A drive device for a two-shaft extruding machine whereby the directions of relative rotation of the two screw shafts of the machine can be rapidly changed without having to manually change a gear. The drive device includes a first shaft, a second shaft disposed coaxially with the first screw shaft and rotatable integrally therewith, a third shaft disposed coaxially with the intermediate shaft and rotatable integrally therewith, a first gear rotatable integrally with the first shaft, a second gear rotatable integrally with the second shaft and meshed with the first gear, a third gear rotatably supported on the third shaft and meshed with the first gear, and a fourth gear rotatable integrally with the second shaft and a fifth gear rotatably supported on the third shaft and meshed with the fourth gear. A claw clutch is provided for rotatably coupling a selected one of the third and fifth gear to the third shaft.