Abstract: A six speed gear assembly for a motorcycle transmission is provided that includes a mainshaft gear shaft with a plurality of mainshaft gears mounted in sequence thereon, wherein the sequence includes a mainshaft 4th gear, a mainshaft 3rd gear, one of a mainshaft 1st gear and a mainshaft 2nd gear, the other of the mainshaft 1st gear and the mainshaft 2nd gear, a mainshaft 6th gear, and a mainshaft 5th gear. The six speed gear assembly also includes a countershaft gear shaft with a plurality of countershaft gears mounted in sequence thereon, wherein the sequence includes a countershaft 4th gear, a countershaft 3rd gear, one of a countershaft 1st countershaft 1st gear and a countershaft 2nd gear, the other of the countershaft 1st gear and the countershaft 2nd gear, a countershaft 6th gear, and a countershaft 5th gear.

Abstract: Ball member is provided between a ball retaining member provided integrally with a driving rotational member and opposed axial end portions of left and right drive shafts, and a selection can be made as necessary between a non-differential operation mode where the drive shafts rotate substantially equally and a differential operation mode where the drive shafts rotate differentially. The retaining member has a through-hole portion to receive part of the ball member. Shift member is slidably fitted over the retaining member and includes a ball-restricting portion of an inner diameter generally equal to an outer diameter of the retaining member and a ball-releasing portion having a greater inner diameter than the restricting portion. Power-transmitting portions are provided on the opposed axial ends with which the ball member is engageable to transmit the driving power.

Abstract: An automated transmission device with torque transfer having an input shaft (18) that supports drive pinions (20), each of which is engaged with a driven pinion (22) that is mounted freely rotating on a output shaft (12); controlled unidirectional locking mechanism (24) which are mounted between the shaft (12) and the driven pinions (22); and mechanical device for activating the locking mechanisms (24) in a positive manner including at least one cam (26) which translationally moves inside the output shaft (12).

Abstract: A transmission between a gear (22) mounted freely to rotate about a shaft and a one-way drive-lock mechanism (26) for engaging in rotation the gear (22) and its shaft in a rotational direction, including a ring (52) integral in rotation with the shaft and bearing on its radial surface (54) at least two dogs (58) pivotally mounted about radial axes (62) between rest and locking positions on the gear (22) wherein they prevent the gear from rotation relative to the shaft. The invention is particularly applicable to transmission systems for a motor vehicle.

Abstract: A transmission for a vehicle which can be applied to a shift mechanism where a shaft itself is rotated and having a simple configuration and axial miniaturization. A transmission for a vehicle in which a plurality of transmission shafts are provided each of which supports a plurality of transmission gears in a row and are arranged in parallel so that mutually corresponding transmission gears are engaged and transmission gears rotating in synchronization with the hollow shaft are selectively switched. Every transmission shaft is provided with a clutch mechanism provided between the hollow shaft and each transmission gear for fitting the hollow shaft and each transmission gear or releasing the fitting and a clutch actuator housed in the hollow shaft and the clutch mechanism selectively fits any transmission gear to the hollow shaft according to the axial position of the clutch actuator.

Abstract: An actuator for a motor vehicle transmission has a shift cylinder performing rotary actuating movements. An electric motor is arranged inside the shift cylinder and drives the latter either through a harmonic drive mechanism or a planetary drive mechanism. The arrangement provides a high reduction ratio and an efficient use of limited space.

Abstract: An automatic control device is provided for a gearbox of a motorized vehicle. The motorized vehicle gearbox includes a movable block movable between a forward driving position, a neutral position, and a reverse driving position. The automatic control device includes a motor, a transmission gear driven by the motor and including an eccentric axle provided thereon, a connecting rod having an end rotatably connected to the eccentric axle, an eccentric block including an end rotatably connected to the other end of the connecting rod, and an actuating device including a first end securely connected to the other end of the eccentric block and a second end securely engaged with the movable block to move therewith. When the motor is activated, the transmission gear is driven to move the movable block to one of the forward driving position, the neutral position, and the rearward driving position.

Abstract: A control device for semiautomatic gearshifting mechanisms of motor vehicles has a selector shaft of a gearshifting mechanism and at least one rotatable shifting element acting on the selector shaft so as to rotate and axially move the selector shaft for selecting a gutter and shifting a gear. A switching valve actuates the at least one shifting element for rotating the selector shaft and for axially moving the selector shaft. The shifting element is a shift drum with at least one control curve. The control curve is a groove in the mantle of the shifting element. The control device provides a simplified hydraulic control of the switching valves and has a simplified configuration.

Abstract: A planetary gear assembly comprising a primary array (2) of co-axial planetary gear sets and a secondary array (3) of co-axial planetary gear sets, planetary gear set being provided with an associated gear engagement means (21), the arrangement being such that in use each planetary gear set and the associated gear engagement means are arranged for relative translational movement which is substantially parallel to the axis of the respective array of planetary gears and a rotational input drives a selected primary gear set which is engaged with the associated gear engagement means, the rotational output of the engaged primary gear set (2) being transmitted through the associated gear engagement means (21) to gear engagement means which is engaged with the associated selected secondary gear set (3), the output from the selected secondary gear set being transmitted to rotational output means (18, 49).

Abstract: A planetary transmission has a plurality of torque-transmitting synchronizer mechanisms that are controlled to engage and disengage positions. The control of the torque-transmitting synchronizer mechanisms is accomplished through a plurality of cam slots and control rods that are disposed between a control mechanism and each of the torque-transmitting synchronizers to enforce engagement and disengagement of the synchronizers.

Abstract: An actuating apparatus (1) for an automated multiple-ratio transmission (2) of a motor vehicle, having a shifter drum (3), actuatable by an actuating drive (5), that comprises at least one guide (9, 10) in which at least one guide element (6, 7), joined to an actuating member of the multiple-ratio transmission (2), is guided; and having at least one further separate shifter drum (4). The shifter drums (3, 4) are kinematically coupled to one another.

Abstract: A device for the sequential control of a gearbox with hand-operated selection and engagement of gears for motor vehicles, the gearbox including a plurality of forks (1) for actuating corresponding groups of gearwheels, comprises: a rotatable drum (11) equipped with one cam groove (12); a plurality of studs (13) engaging in the cam groove (12) for being moved parallel to the axis of the drum (11); an angle selector (15, 16) for controlling rotation of the drum (11); actuating members (2, 3, 4, 7, 9) each connecting a stud (13) to a respective fork (1) so as to cause each fork to translate axially fast with the respective stud (13). The actuating members comprise first (3, 4) and second (7, 9) axially mobile elements, wherein each first mobile element is fast for translation with a rod (2) connected to a respective fork (1) and each second mobile element is fast for translation with a respective stud (13) and a respective first mobile element.

Abstract: In a selector device for a change-speed gearbox, a selector shaft arranged in such a way as to be rotatable and axially displaceable relative to a housing is connected by respective auxiliary mechanisms for converting a reciprocating motion into a rotary motion by at least two choosing sleeves that are arranged concentrically, rotatably and in an axially displaceable manner relative to it and are fixed rotatably and in an axially nondisplaceable manner relative to the housing when firmly braked by respective brakes. In significant angular positions, the selector shaft can be actuated out of a neutral position in one of the two axial directions of its axis of rotation into an end position associated with a respective gear. The auxiliary mechanisms are harmonized in such a way with one another that the respective new gear can be chosen initially and selected by external actuation of the selector shaft in just one direction of its axis of rotation and selective engagement of one, two or none of the brakes.

Abstract: An actuator for a motor vehicle transmission has a shift cylinder performing rotary actuating movements. An electric motor is arranged inside the shift cylinder and drives the latter either through a harmonic drive mechanism or a planetary drive mechanism. The arrangement provides a high reduction ratio and an efficient use of limited space.

Abstract: An automated gear drive, comprising two main gearshafts (18, 20) bearing drive pinions (22, 24) and linked each by a clutch (E1, E2) to a clutch shaft (10), a gearbox output shaft (12) bearing driven pinions (26) each of which is associated with one-way locking device (28) controlled to be selectively interlocked with the gearbox output shaft (12), the one-way locking device (28) being controlled by mechanical device (30, 32, 34) common to all the loose pinions (26) of the different gear ratios. The automated gear drive enables in particular gear ratio shift with uninterrupted torque transmission to the gearbox output shaft (12).

Abstract: A device for the sequential control of a gearbox with hand-operated selection and engagement of gears for motor vehicles, the gearbox including a plurality of forks (1) for actuating corresponding groups of gearwheels, comprises: a rotatable drum (11) equipped with one cam groove (12); a plurality of studs (13) engaging in the cam groove (12) for being moved parallel to the axis of the drum (11); an angle selector (15, 16) for controlling rotation of the drum (11); actuating members (2, 3, 4, 7, 9) each connecting a stud (13) to a respective fork (1) so as to cause each fork to translate axially fast with the respective stud (13). The actuating members comprise first (3, 4) and second (7, 9) axially mobile elements, wherein each first mobile element is fast for translation with a rod (2) connected to a respective fork (1) and each second mobile element is fast for translation with a respective stud (13) and a respective first mobile element.

Abstract: A shift system for a transfer case including a spring-loaded range fork assembly operable for shifting a range sleeve between two speed range positions. The range fork assembly includes a bracket, a range fork, and a spring assembly. The spring assembly is compressed and inserted into chambers formed in both the bracket and range fork. The range fork assembly is slidably maintained on a shift rail and the range fork is coupled to the range sleeve. An actuator mechanism is provided for causing selective axial movement of the range fork assembly on the rail. The spring assembly allows the bracket to shift and apply a shift force on the range fork. This shift force causes the range fork to slide the range sleeve to the desired range position.

Abstract: A transmission for changing a ratio of a rotational number of a power source and a rotational number of an output shaft by shifting a gear train provided between the power source and the output shaft by moving a shift fork. The transmission includes a shift drum for moving the shift fork, a clutch provided between the power source and the gear train, a shift spindle for urging the shift drum and the clutch. When the shift spindle is pivoted, lift of a clutch is started by pivoting a clutch arm. In accordance with pivoting the shift spindle, a sub arm is pivoted and preload is applied on a master arm by a preload spring. Thereafter, when the sub arm is further pivoted, the master arm follows the sub arm and a shift drum is pivoted via index pins. Since the preload is applied, when the clutch is disengaged, the shift drum is pivoted immediately, a shift fork is displaced and gears are switched.

Abstract: There is provided a transmission apparatus for a vehicle, which is arranged between a counter shaft and a drive shaft disposed in an engine unit of the vehicle, the transmission apparatus having a simple and compact structure and ease operability and permitting to achieve a reliable transmission respectively between forward gears and reverse gear to thereby make power transmission loss as small as possible and improve controllability of a gearshift fork for the reverse gear.

Abstract: A gear shifting mechanism includes a spindle, a drum shaft, a fork guide, a reverse shaft, and a main shaft, wherein the spindle is provided with a first gear, the drum shaft is provided with a drum, a second gear is mounted on each side of the drum, the first gear of the spindle is meshed with the second gear of said drum, said fork guide is provided with a fork having an end engaged with a sliding rail of said drum and another end engaged with a drum gear shift, and said drum gear shift is provided with a forward gear and a rear gear at two sides thereof, characterized in that said drum is sleeved over said drum shaft and two compression springs urge against two sides of the drum to keep the drum in place, thereby enabling the drum to slide on the drum shaft.

Abstract: Automatic neutral finder apparatus for a motorcycle transmission, for automatically locating and positively engaging the transmission's neutral position. A preferred embodiment of the apparatus includes a shifter cam rotatable about an axis through predetermined rotational displacements for effecting gear shifts and having a neutral position; a stop indexed to the neutral position of the cam; a plunger actuable for engaging the stop to stop rotation of the cam when the cam is at its neutral position; and a circuit associated with the plunger and including a switch operable by the motorcycle operator for actuating the plunger to engage the stop. The plunger is further actuable for disengaging the stop, and the switch is preferably operable by the motorcycle operator for actuating the plunger to disengage the stop.

Abstract: A gearbox structure of a beach cycle includes a gearbox which may transmit a power of an engine to a power shaft and a propeller shaft. A clutch mounted between the change gears of the gearbox can be shifted by a gear shift device into a neutral position, a reverse gear position and a forward gear position. The gear shift device includes a gear lever which rotates a sector-shaped gear which rotates a gear shift cam shaft which is formed with a slot for driving a gear shift drive fork which shifts the clutch to the neutral position, the reverse gear position, and the forward gear position. The gearbox is further provided with a force increase gear, and the propeller shaft is additionally provided with a drive gear which meshes with a helical gear of a distance calculator which has a connecting line externally connected to an odometer.

Abstract: A gearbox structure of a beach cycle includes a gearbox which may transmit a power of an engine to a power shaft and a propeller shaft. A clutch mounted between the change gears of the gearbox can be shifted by a gear shift device into a neutral position, a reverse gear position and a forward gear position. The gear shift device includes a gear lever which rotates a sector shaped gear which rotates a gear shift cam shaft which is formed with a slot for driving a gear shift drive fork which shifts the clutch to the neutral position, the reverse gear position, and the forward gear position. The gearbox is further provided with a force increase gear, and the propeller shaft is additionally provided with a drive gear which meshes with a helical gear of a distance calculator which has a connecting line externally connected to an odometer.

Abstract: The actuating arrangement includes a torque transmitting system that includes a first device for initiating, discontinuing or regulating the transmission of torque. A transmission includes a second device for initiating a gear shifting operation within one of a plurality of gear shifting paths. The transmission further includes a third device for initiating the gear ratio selecting operation among the gear shifting paths. An electronic control unit is operatively connected to at least one actor. The at least one actor activates in a predetermined manner, one of the first device, second device and third device for the initiation of the transmission of torque, gear shifting or gear ratio selecting operation.

Abstract: In a transmission for automobiles, the shift feeling is improved by smoothly transferring the operational load between a shift rod and a reverse shift fork. This is accomplished by cam faces formed on a reverse shift fork which shifts a reverse idle gear between a neutral position and a reverse position, and cam faces are formed on a drive cam which moves integrally with a shift rod. When the drive cam is moved from a neutral position to the reverse position, one of the cam faces presses against another of the cam faces moving the reverse shift fork in a circular manner in an anticlockwise direction, and the reverse idle gear moves to the reverse position. When the drive cam member is moved from the reverse position to the neutral position, another of the cam faces presses against still another of the cam faces moving the reverse shift fork in a circular manner in a clockwise direction, and the reverse idle gear moves to the neutral position.

Abstract: A shift mechanism of an outboard engine has a shift cam which is remotely-operable to effect change-over of the direction of rotation of a propeller shaft in a gear case. A shift cam support member is a member separate from and detachably secured to the gear case. The shift mechanism permits use of a single design of the gear case adapted to either a rotary shift cam or a vertically-movable shift cam.

Abstract: There is provided a transmission apparatus for a vehicle, which is arranged between a counter shaft and a drive shaft disposed in an engine unit of the vehicle, the transmission apparatus having a simple and compact structure and ease operability and permitting to achieve a reliable transmission respectively between forward gears and reverse gear to thereby make power transmission loss as small as possible and improve controllability of a gearshift fork for the reverse gear.

Abstract: Unit for controlling the shaft for selection and engagement of gears, provided with a control shaft, which can be connected to the said shaft for selection and engagement of the gears, with a device for movement, which can impart to the shaft angular movements which are designed to implement the passage between two angular engagement positions of gears which belong to a single row, and with a cam-guide device, which can modify the said angular displacements, selectively by command, into combined axial and angular displacements, such as to implement the change of gear between consecutive gears which belong to consecutive rows; the cam-guide device being axially mobile along the control shaft, between a plurality of row-change positions, at each of which it can guide the control shaft in the said combined angular and axial displacement, which can implement the passage of gear between two consecutive gears which belong to two consecutive rows; the cam-guide device also being able selectively to use the angular d

Abstract: A gear shifting drum (2) for a gear shifting device of variable-speed gearboxes for motor vehicles has a curved path (11a to 11c) for guiding an engagement member (13) of the gearshift fork (12a to 12c), wherein the gearshift fork (12a to 12c) is directly connected to a synchronization device. According to the invention, at least one radially outwardly directed wall (9, 10) is arranged on the outer surface area (8) of the gear shifting drum (2) for formation of the curved path (11a to 11c).

Abstract: A bike inner derailleur has manifold stages of speed alteration, including a flat projecting wheel rotatable to produce angle change, plural control rods fitted on a fix shaft and moved by the flat projecting wheel, and the fix shaft is fitted in a hollow center interior of a wheel hub. Then selecting a rotating angle of the flat projecting wheel may operate to changeover detents of single direction provided in an input route formed between a power input source and a power output source through at least one or more control rods moving horizontally. Further, an intermediate ring is provided between two planetary gear groups, operated to changeover the detents for selecting manifold power transmitting routes.

Abstract: A control device for a gear change of a vehicle comprising a support structure, a control member borne by the support structure such that it can move in translation along a first axis and rotate about this axis in order to carry out a maneuver to select the row of gears and a maneuver to engage or disengage these gears, an actuator cooperating with the control member in order to rotate it about the first axis and dispose it, for each row of gears, in a neutral position and two engagement positions of respective gears, and a cam and tappet unit interposed between the support structure and the control member which can be selectively actuated in order axially to displace the control member by a predetermined amount during the actuation of the actuator; the cam and tappet unit comprises a tappet member borne by the support structure and a guide member rigid with the control member and provided with a series of cams parallel to one another and each adapted to be selectively engaged by the tappet member in order to

Abstract: In a selector device for a change-speed gearbox, a selector shaft arranged in such a way as to be rotatable and axially displaceable relative to a housing is connected by respective auxiliary mechanisms for converting a reciprocating motion into a rotary motion by at least two choosing sleeves that are arranged concentrically, rotatably and in an axially displaceable manner relative to it and are fixed rotatably and in an axially nondisplaceable manner relative to the housing when firmly braked by respective brakes. In significant angular positions, the selector shaft can be actuated out of a neutral position in one of the two axial directions of its axis of rotation into an end position associated with a respective gear. The auxiliary mechanisms are harmonized in such a way with one another that the respective new gear can be chosen initially and selected by external actuation of the selector shaft in just one direction of its axis of rotation and selective engagement of one, two or none of the brakes.

Abstract: An actuating device for automatic operation of a gear change in a transmission that produces a change in predetermined translation ratios of the gear change transmission in any desired sequence comprises first and second drives that are in active connection with a selector shaft. The first drive is connected to the selector shaft via a guide mechanism which comprises at least one constraint guide that corresponds to a shifting path. The second drive is in active connection with the selector shaft for providing an operating force in the axial direction and an operating force in the circumferential direction of the selector shaft. The resulting movement depends on the operating position of the guide mechanism.

Abstract: A motorcycle transmission shifter assembly including a cam drum having at least two pins extending therefrom, and a shift mechanism engageable with the pins. The shift mechanism includes a tooth that is operable to engage a first one of the pins to rotate the drum in a first direction and a stop that is operable to engage a second one of the pins to prevent over-rotation of the drum in the first direction. Preferably, the shift mechanism includes a shift pawl and a shift lever and the stop is mounted on either the shift pawl or the shift lever. Additionally, the shift mechanism can include a second stop mounted on the other of the shift pawl or the shift lever, the second stop being operable to engage a third one of the pins to prevent over-rotation of the drum in a second direction.

Abstract: The actuating arrangement includes a torque transmitting system that includes a first device for initiating, discontinuing or regulating the transmission of torque. A transmission includes a second device for initiating a gear shifting operation within one of a plurality of gear shifting paths. The transmission further includes a third device for initiating the gear ratio selecting operation among the gear shifting paths. An electronic control unit is operatively connected to at least one actor. The at least one actor activates in a predetermined manner, one of the first device, second device and third device for the initiation of the transmission of torque, gear shifting or gear ratio selecting operation.

Abstract: Shift control assembly for a power transmission device includes an electric drive motor and gear train having an output which is coupled to and bi-directionally rotates a shift rail. The shift rail includes a pair of spaced-apart cam followers. Freely rotatably receiving the shift rail and disposed thereon between the cam followers is a shift fork assembly. The shift fork assembly includes a body having a pair of spaced-apart helical cam surfaces engaged by the cam followers and a fork engaging a shift clutch collar. As the shift rail rotates bi-directionally, the shift fork assembly and clutch collar bi-directionally translate. A circular plate is disposed for rotation with the shift rail and includes an array of apertures. A plurality of sensors are disposed in adjacent, sensing relationship to the circular plate.

Abstract: The present invention proposes a power train and the operation thereof, suitable for automated actuation of a transmission shiftable between a plurality of gears with a torque transmitting system being actuated automatically at least during a gear change, at least one actuating element operable by at least one drive unit and at least one actuatable shift element being disposed at the transmission side. The invention provides a power train in which a driving connection is disposed between at least one actuatable shift element associated with the transmission and an actuator having at least one drive unit, and at least one presettable elastic means is provided in the power transmitting path of the driving connection between the drive unit and the at least one shift element. Further, at least one additional presettable elastic element can be disposed in the power transmitting path between the at least one actuating element and the at least one shift element on the transmission side.

Abstract: An integrated cam and shift fork assembly is disposed on a rotating shift rail. The shift fork assembly includes a cylindrical body having a helical cam at one end. Adjacent the cam end of the body is a cam follower secured to the rotating shift rail. The opposite end of the body either includes a second cam and suitably disposed cam follower or a flat surface engaged by a return spring. The rotating shift rail is driven by an electric motor through a suitable speed reducing and torque increasing drive such as a worm gear set. One or both of the aforementioned cam configurations may be utilized in a transfer case on a single shift rail to, for example, select a high or low speed range, couple the primary and secondary drive lines together or both.

Abstract: A dual speed film drive apparatus to achieve high speed and low speed film drive employs a limited speed range stepper motor with pinion input drive gear, and an output driven gear connected to a film advance mechanism. High and low speed drive is achieved by use of a pivoted intermediate gear drive module having high speed and low speed gear set positions to interconnect the stepper motor input drive gear to the output driven gear. Shifting of the gear module between gear set positions is accomplished by a DC motor operated cam drive mechanism which pivots the gear module selectively between the high speed and low speed gear set positions. An open loop control gear mesh procedure is also described for meshing the high speed and low speed intermediate gear drives with the input drive gear and output driven gear.