Abstract: A shift drum apparatus is reduced in weight relative to conventional shift drums. The shift drum includes a shift fork, a shift drum main body, and a lid member. The shift fork is slidably mounted on a shift fork support shaft. The shift fork changes a gear position of a transmission mechanism. The shift drum main body is formed into a hollow cylindrical shape. The shift drum main body has an end face on a first side thereof in a cylindrical axis direction that is open to form an opening portion. The shift drum main body further includes a cam groove formed on an outer circumferential surface thereof. An end portion of the shift fork is fitted in this cam groove to allow the shift fork to slide. The lid member is disc-shaped and mounted by being press-fitted in the opening portion of the shift drum main body.

Abstract: A gear change control system of an automatic transmission, includes: a shift member, including a shaft portion having a selection axis oriented in a selecting direction, and a pair of arm portions formed on the shaft portion and projecting therefrom; shift rail members, having rail shaft portions, and having a shift axis oriented in a shifting direction; shift fork portions, formed on the rail shaft portions; shift lug members, formed on the rail shaft portions and including pillar-shaped portions. The arm portions swing about the selection axis to apply a pressure in the shifting direction from one side of the pillar-shaped portion by one of the arm portions to cause the shift fork portion to make a shifting operation, and to apply a pressure in the shifting direction from the other side of the pillar-shaped portion by the other arm portion to make a shift withdrawing operation.

Abstract: An automatic transmission assembly having a transmission unit including a plurality of gear pairs, a shift drum, a pair of clutches; and a controller. The controller performs a preliminary upshifting action in advance for angularly moving the shift drum depending on a next gear position in an upshifting direction while rotary drive power is being maintained at a given gear position, and when an upshifting command is output, the controller engages one of the clutches simultaneously with the command. When a downshifting command is output, the controller performs a preliminary downshifting action in advance based on the downshifting command. The partially neutral positions are provided between predetermined angular positions on the shift drum for temporarily reducing the angular speed of the shift drum when the shift drum is being angularly rotated.

Abstract: A transmission for an internal combustion apparatus is provided in which a parking lock mechanism is commonly formed with an upstream side portion of a power transmission system of a shift change mechanism, whereby the number of parts is reduced and the parking lock mechanism is compactly incorporated therein to achieve miniaturization of the internal combustion engine. The transmission in which a shift change mechanism performs a shift change in response to an operation of a gear selecting apparatus is configured to include a parking lock mechanism which is driven in an interlocking relationship with a working portion of the shift change mechanism, and if the shift change mechanism is set to the parking position, then a rotary shaft of the transmission is locked against rotation by the parking lock mechanism thereby restricting rotation of the rotary shaft.

Abstract: The control system including four actuating forks, each associated to one or two gears and having a first engagement member, and a first hydraulically-operated actuator for controlling engagement of all gears. The first hydraulically-operated actuator includes: a shaft provided with four second engagement members for engagement each with a respective first engagement member of the actuating forks and arranged to turn about and translate along its axis; a cylinder coaxial to the shaft and arranged only to translate in the direction of its axis; and a pin drivingly connected either to the shaft or the cylinder and engaging in an S-shape groove provided either in the cylinder or shaft, respectively, so as to link the rotational and translational movements of the shaft with the translational movement of the cylinder. A second hydraulically-operated actuator is arranged to lock or release selectively the translational movement of the cylinder.

Abstract: A small center distance is provided between a crankshaft and a gearshift shaft disposed in parallel. A power unit is built compactly in a direction of arrangement of the crankshaft and the gearshift shaft for supporting reliably the gearshift shaft on which heavy, first and second gearshift clutches are supported. A transmission includes a main shaft, disposed in parallel with a crankshaft and rotatably supported in a crankcase, and first and second gearshift clutches. The first and second gearshift clutches change a gearshift position in a first gearshift portion and a gearshift position in a second gearshift portion, respectively. The main shaft includes an outer shaft portion that extends from the crankcase and supports the first and second gearshift clutches. The outer shaft portion is supported by a bearing portion disposed in a front cover on a side opposite to the crankcase across the first and second gearshift clutches.

Abstract: A gear change control device for improving the stability of shift changes in a straddle-type vehicle. In response to an operation of a shift up switch or a shift down switch, the target angular position (?max(up), ?max(down), ?meet(up), ?meet(down), ?on(up), ?on(down)) and the rotational speed (vmax(up), vmax(down), vo(up), vo(down), v12(up)-v34(up), v21(down)-v43(down)) of a shift shaft are set based on a gear change command input signal inputted from the shift up switch or the shift down switch to a CPU. The shift shaft is rotationally driven at the set rotational speed until the set target rotational position is reached.

Abstract: A shift mechanism that provides a shift mechanism for enabling smooth gear shifting by a transmission, and a vehicle equipped therewith. With this mechanism, a shift drum, to which shift forks are connected via grooves on an outer periphery, is held every predetermined rotation angle. When differences are produced in the degree of rotation between a third rotating member that rotates by motor rotation and a second rotating member that rotates in accordance with the third rotating member, bias is accumulated in a torsion spring. Bias that is accumulated is released when the rotation angle of the third rotating member equals or exceeds a predetermined angle of rotation, rotating a first rotating member via a second rotating member, and rotating the shift drum quickly.

Abstract: A shift mechanism for a manual planetary transmission has a plurality of control members. Each control member has a slot configuration for each shift rail defined therein. The slot configurations are aligned among plates and a pin member is inserted in each of the slot configurations. Manipulation of any one of the plates produces movement of two or more of the pin members. The pin members are operable upon movement to select the engagement of the synchronizers, which are disposed within a power transmission. The synchronizers establish drive ratios between the input shaft for the transmission and the output shaft for the transmission.

Abstract: A transfer case includes a two-speed range unit, a friction clutch, a power-operated actuation mechanism and a control system. The actuation mechanism includes an electric motor, a geartrain driven by the motor for controlling rotation of an actuator shaft, a range actuator assembly and a mode actuator assembly. The range actuator assembly functions to move a shift collar associated with the range unit in response to rotation of the actuator shaft. The mode actuator assembly includes a mode cam and a ballramp unit. The mode cam is rotatively driven by the actuator shaft for controlling the clutch engagement force exerted on the friction clutch by the ballramp unit.

Abstract: A multistage transmission is provided that smoothly operates with a small force without the necessity of a shift clutch, that does not cause a loss of switching time during shifting, and that does not cause escape of a driving force as well as provides a small shift shock. When shift drive means executes upshift to a one-step-upper speed-change stage reduced in reduction ratio by one stage, normal rotation odd-numbered stage cam rods Cao and normal rotation even-numbered stage cam rods Cae alternately operate normal rotation odd-numbered stage engaging members Rao and the normal rotation odd-numbered stage engaging members Rae for shifting.

Abstract: A multistage transmission includes a swing claw member having a pin-receiving portion adapted to receive a pin member and an engaging claw portion on respective sides opposite to each other with respect to swing center, and swung by the advancement and retraction of the pin member to allow the engaging claw portion to establish engagement and release the engagement; and biasing means for biasing the swing claw member in a swing direction of bringing the engaging claw portion into engagement. The biasing means is a compression spring interposed between the inner surface of the engaging claw portion of the swing claw member and the opposing surface of the gear shaft. The multistage transmission uses multiple swing claw members of the same kind, instead of swing claw members of different kinds.

Abstract: The invention provides a transmission of a vehicle which can smoothly execute shift-up and shift-down operations. The transmission is provided with change gears, a shift member, a change drum, a change shaft rotationally operated at a predetermined angle by a rider, and a change operation force transmitting mechanism transmitting the rotation of the change shaft to the change drum.

Abstract: A shifting device for a dual clutch transmission, the dual clutch transmission including a first input shaft, a second input shaft, a counter shaft, a dual clutch, a first gear change mechanism including at least a first gear train and a first switching clutch, and a second gear change mechanism including at least a second gear train and a second switching clutch, the shifting device including a shift mechanism constituted by a first shifter that includes a first follower pin and a first shift fork, a second shifter that includes a second follower pin and a second shift fork, and a cam member at which a single cam groove is formed, and the first and second follower pins engaging with different positions on the cam groove from each other and operating the first and second switching clutches to be associated with each other.

Abstract: A transfer case includes a two-speed range unit, a friction clutch, an actuation mechanism and a control system. The actuation mechanism includes an electric motor, a geartrain driven by the motor, a range actuator assembly and a mode actuator assembly. The range actuator assembly includes a driveshaft driven by the geartrain, a cam driven by the driveshaft and a shift fork having a follower retained in a groove formed in the cam and a fork engaging a shift collar associated with the range unit. The mode actuator assembly has a face cam with spiral cam surfaces and a control gear with radially-moveable rollers engaging the cam surfaces. The control gear is rotatively driven by the geartrain. The face cam is axially moveable for controlling engagement of the friction clutch. An anti-rotation mechanism limits rotation of the face cam in response to continued rotation of the control gear.

Abstract: A transmission includes a first shifting part and a second shifting part which shift power of an internal combustion engine, a first shift clutch transmitting and interrupting the power to the first shifting part, and a second shift clutch transmitting and interrupting the power to the second shifting part, and a selection mechanism which selects gear steps. The selection mechanism includes three shifters that are respectively guided by cam grooves of a single shift drum through shift forks. The shifters can be respectively moved to selection positions where the gear steps are selected and to neutral positions where the gear steps are not selected in the first shifting part and the second shifting part. The cam grooves guide the shifters to the selection positions in each of the first shifting part and the second shifting part for each of predetermined rotational positions of the shift drum.

Abstract: A groove follower (70; 90) for cooperating with a shift groove (48) of a shift drum (44) of a multi-step transmission for a motor vehicle, the groove follower (70; 90) having a vertical crowning and a longitudinal crowning, and the shift groove (48) defining an active diameter along which the groove follower (70; 90) is to be guided in a state in which the groove follower (70; 90) engages into the shift groove (48), and the entirety of all the vertices (SHB) of the vertical crowning forming a guide curve (L) along the circumference of the groove follower, characterized in that the position of the vertices of the vertical crowning is selected such that the guide curve (L) corresponds essentially to the active diameter of the shift drum (44).(FIG.

Abstract: A shift control device for a vehicle transmission is provided in which drive means for making a shift drum pivot is connected to the shift drum, wherein the drive means (112) includes a power source (113) disposed on at one end, in the axial direction, of the shift drum (104), and a transmission shaft (117) to which power from the power source (113) is transmitted at the one end, in the axial direction, of the shift drum (104), power from the transmission shaft (117) being transmitted to the other end, in the axial direction, of the shift drum (104). This enables an internal combustion engine to be made compact while avoiding a concentrated disposition of the drive means on one side, in the axial direction, of the shift drum.

Abstract: Described herein is a hydraulic servo for a gear change provided with a control shaft; the servo has: a frame; a first hydraulic actuator, which is carried by the frame and has two first chambers, which are alternatively filled with a pressurized fluid for displacing the control shaft axially in the two directions; two first solenoid valves, which control filling of the two first chambers; a second hydraulic actuator, which is carried by the frame and has at least one second chamber that is filled with a pressurized fluid for rotating the control shaft about its central axis; a second solenoid valve, which controls filling of the second chamber; and a supporting body, which is fixed to the frame, houses the solenoid valves, and has inside it a series of hydraulic circuits, which connect the solenoid valves themselves both to the chambers of the actuators and to a supply of the pressurized fluid.

Abstract: A gearshift position detector, for a transmission component of a powertrain unit including an engine and a transmission, includes first and second actuator arms for cooperatively interacting with neutral and reverse indicator switches. The neutral and reverse indicator switches are mounted to a crankcase or a crankcase cover of the engine. The acutator arms are selectively operable to trip the respective switches, and thereby, to generate signals for alerting a vehicle operator that the transmission is in neutral or reverse. The actuator arms are operatively attached to a shift drum skip-turn-prevention plate which, in turn, is secured to an axial end surface of a shift drum. The indicator switches are, respectively, capable of being energized upon interaction between the corresponding actuator arm and the switch. In this configuration, the main components of the detector are housed within the crankcase, thereby saving space in the vicinity of the engine.

Abstract: A transmission selector mechanism for controlling a gearbox which provides forward/reverse direction and high/low ratios using two coupling members (6?, 53:7?, 54) each axially slideable in both directions either side of the a respective neutral position to couple a selected one of a pair of gears (10, 12:11, 13) to an associated shaft (4, 5). The mechanism includes a driver operated forward/reverse selector member (50) and a driver operated high/low ratio selector member (52). The forward/reverse selector member (50) moves a first selector formation (64, 64b) which is engageable with a first coupling formation means (66) on a first cam (61) which moves one of the coupling members (7?, 54). The high/low selector member (52) moving a second selector formation (63, 63b, 63c) which is engageable with a second coupling formation means (65) on a second cam (58) which moves the other coupling member (6?, 53).

Abstract: An engine includes an engine case split into an upper case and a lower case. A crankshaft and a transmission input shaft are rotatably supported at a mating surface between the upper and lower cases, and a transmission output shaft rotated by the transmission input shaft is supported in the lower case. One side face of the lower case has a circular opening through which the transmission output shaft can be inserted from the outside. An eccentric bearing holder holding a bearing that rotatably supports one end of the transmission output shaft is mounted in the opening in a detachable manner from the outside. The axis of the transmission output shaft deviates from the center of the eccentric bearing holder toward the transmission input shaft. The inner diameter of the opening is larger than the outer diameter of the largest one of transmission driven gears of the transmission output shaft.

Abstract: The present invention discloses and claims a torque transfer mechanism. The torque transfer mechanism connects an input shaft to an output shaft to transmit rotation and torque in either direction from the input shaft to the output shaft. The torque transfer mechanism also inhibits the transmission of rotation and torque in at least one direction from the output shaft to the input shaft. In alternate embodiments, the torque transfer mechanism may transmit rotation and torque in one direction from the output shaft to the input shaft. In still further embodiments, the torque transfer mechanism may inhibit the transmission of rotation and torque in either direction from the output shaft to the input shaft.

Abstract: An adjusting device for a transmission is described. The device has at least one movable adjusting element, a plurality of sensors for detecting a position of the at least one movable adjusting element, which are arranged substantially parallel to one another, and a plurality of cam paths having sections of different heights, assigned to corresponding ones of the plurality of sensors. The device also includes a plurality of scanning elements coupled to the plurality of sensors for mechanically scanning the sections of different height, and at least one catch of each of the plurality of cam paths in which a latching element is engageable, wherein the plurality of sensors and the latching element are designed as a common component. The plurality of cam paths result in comparable stroke movements arising for each of the plurality of scanning elements.

Abstract: Described herein is a servo for a gear change provided with a control shaft; the servo has: a first actuator, which displaces the control shaft axially along a central axis thereof and is directly coupled to the control shaft; and a second actuator, which renders a cam engaged by a pin projecting from the control shaft angularly fixed to a fixed frame to cause rotation of the control shaft about its central axis during the axial displacement; a cylindrical tubular element is provided, which is coaxial to the control shaft, receives inside it an end portion of the control shaft, supports the cam, and is pushed axially by the second actuator against the fixed frame.

Abstract: Provided is a transmission in which gears of a first-speed to a seventh-speed shift stages are relatively rotatably supported on an outer circumference of a rotational shaft with clutch mechanisms. A desired shift stage is achieved by selectively engaging or disengaging the clutch mechanisms by moving, in an axial direction, the slide cam disposed inside the rotational shaft. While the slide cam is formed into a cylindrical shape, a cylinder, as an actuator, is disposed in a space inside the cylindrical slide cam. Oil chambers are formed inside the cylinder respectively to sandwich a piston therebetween. Oil pressure is supplied to the oil chambers to move the slide cam in the axial direction. The provided transmission with such a configuration has a smaller size than a transmission with the actuator disposed outside the slide cam.

Abstract: An actuator arrangement for a twin-clutch transmission has a first and a second partial transmission. The first partial transmission contains odd forward gear stages and the second partial transmission contains even forward gear stages. At least one first and one second selector drum have in each case one controllable drive motor and at least one control cam. Each control cam is assigned at least one cam follower. The control cam of at least one selector drum encircles through at least 360°. The associated drive motor is designed to drive said selector drum through at least 360°. The gear stages are distributed on the two selector drums, and arranged on the control cams, in such a way that at least one direct multiple shift can be carried out.

Abstract: A transmission structure of a power unit for a vehicle includes a clutch mechanism that is provided between a crankshaft and a main shaft, and is installed at the end of the main shaft outside a crankcase. The transmission includes a shift drum for driving shift forks for selectively establishing any of plural speeds. Both ends in an axial direction of the shift drum are rotatably supported by the crankcase. In the transmission structure, a sealed structure dedicated to the shift drum is not required, the number of parts is reduced and the assembly time is reduced. The shift drum, arranged in the maximum outside diameter of the clutch mechanism when viewed in a plane perpendicular to the axis of the main shaft, is assembled in the crankcase from the side of the clutch mechanism.

Abstract: A system for actuating gear changes in a motor vehicle transmission includes an electric motor including a motor shaft supported for rotation about an axis, first and second actuator drums supported for rotation substantially parallel to the axis, and a drive mechanism including a first power path driveably connecting the motor shaft and the first drum, and a second power path driveably connecting the motor shaft and the second drum.

Abstract: A shifting device for the shifting of a transmission with a shifting shaft (2), having a multiplicity of shifting forks or shifting levers (8, 10, 12, 14) placed in an axial slidable manner for the carrying out of a shifting procedure with a selection apparatus (28, 30, 32, 42, 44, 46) for the choice of a shifting fork (8, 10, 12, 14) from the multiplicity of shifting forks for the carrying out of the shifting procedure and with blocking disk (52) for the prevention of the movement of non-chosen shifting forks (8, 10, 12, 14). The elements (2, 8, 10, 12, 14, 20, 22) for the carrying out of the shifting procedure are made from a material of high structural strength and the elements of the selection apparatus (28, 30, 32, 42, 44, 46) and the blocking apparatus (52) are constructed from a material of lesser structural strength.

Abstract: An adjusting device for a transmission is described. The device has at least one movable adjusting element, a plurality of sensors for detecting a position of the at least one movable adjusting element, which are arranged substantially parallel to one another, and a plurality of cam paths having sections of different heights, assigned to corresponding ones of the plurality of sensors. The device also includes a plurality of scanning elements coupled to the plurality of sensors for mechanically scanning the sections of different height, and at least one catch of each of the plurality of cam paths in which a latching element is engageable, wherein the plurality of sensors and the latching element are designed as a common component. The plurality of cam paths result in comparable stroke movements arising for each of the plurality of scanning elements.

Abstract: A system for actuating couplers to produce gear changes in a motor vehicle transmission includes first and second actuator drums supported for rotation, and first and second shift forks. Each first shift fork is driveably connected to a first actuator drum, secured to a first coupler, and displaced in response to rotation of a first actuator drum between a neutral state, wherein no gear is engaged, and at least one first drive state, wherein a gear of a first gear group is engaged. Each second shift fork is driveably connected to a second actuator drum, secured to a second coupler, and displaced in response to rotation of a second actuator drum between a neutral state, wherein no gear is engaged, and at least one second drive state, wherein a gear of the second gear group is engaged.

Abstract: A shifting device for shifting a transmission with a shifting shaft upon which a plurality of shifting forks are located in an axial, slidable manner for carry out desired shifting procedures. The shifting device includes a selection apparatus for choosing the shifting fork to be activated for carrying out the shifting procedure and a blocking mechanism, which prevents movement of each of the non-chosen shifting forks. The blocking mechanism is located on an additional shaft which extends parallel to the shifting shaft and supports elements of the selection apparatus. A first actuator axially displaces the shifting shaft, when carrying out of the shifting procedure, and another actuator causes the additional shaft to rotate for choosing a desired the shifting fork to carry out the shifting procedure and for preventing movement of non-chosen shifting forks.

Abstract: A torque transfer mechanism connects an input shaft to an output shaft to transmit rotation and torque in either direction from the input shaft to the output shaft. The torque transfer mechanism also inhibits the transmission of rotation and torque in at least one direction from the output shaft to the input shaft. In alternate embodiments, the torque transfer mechanism may transmit rotation and torque in one direction from the output shaft to the input shaft. In still further embodiments, the torque transfer mechanism may inhibit the transmission of rotation and torque in either direction from the output shaft to the input shaft.

Abstract: A shift device for a transmission, which comprises a sliding sleeve, a shift fork engaging in the sliding sleeve, and an actuator that can rotate on a shaft that is disposed at an angle to the transmission shaft. In order to provide a simple and reliable control that satisfies all functional requirements, a cam having two flanks and a flattened section on the maximum radius is disposed on the shaft. On the base of the shift fork, two interacting pushrods are disposed at a fixed distance so that one pushrod rests against the one flank and the other pushrod rests against the other flank and one pushrod rests against the flattened section in at least one extreme position.

Abstract: A method of forming a gearbox includes the use of hollow structural steel.

Abstract: The invention relates to an actuator arrangement for a twin-clutch transmission which has a first and a second partial transmission. The first partial transmission contains odd forward gear stages and the second partial transmission contains even forward gear stages. At least one first and one second selector drum have in each case one controllable drive motor and at least one control cam. Each control cam is assigned at least one cam follower. The control cam of at least one selector drum encircles through at least 360°. The associated drive motor is designed to drive said selector drum through at least 360°. The gear stages are distributed on the two selector drums, and arranged on the control cams, in such a way that at least one direct multiple shift can be carried out.

Abstract: Shift drum (10; 10?) for a multi-step transmission of a motor vehicle, with at least one circumferential track (14, 16), in particular circumferential groove (14, 16), into which at least one axially displaceable track follower (S, T) can engage, the circumferential track (14, 16) having flanks (22, 24) along which the track follower (S, T) is guided, characterized in that one of the flanks (22) has a portion (26) which is mounted so as to be movable axially out of a normal position against a restoring force (FR).

Abstract: A shifting device for a transmission, in which at least one gearshift package is allocated to two non-successive gears and each of these gearshift packages is coupled with a gearshift lever. An H- or a multiple H-shifting diagram is allocated to the gearshift lever, in which the gears that can be selected within a gearshift path are allocated to different gearshift packages. The gearshift lever and the gearshift packages are connected to a conversion device with which a gearshift lever movement to take out a previous gear in a gearshift path causes this gear to be taken out in a first gearshift package. A gearshift lever movement for putting in the new gear in the same gearshift path, a second gearshift package puts in this new gear. The conversion device functions in such a way that the gearshift lever is coupled with an axially displaceable and radially pivotable shift finger shaft.

Abstract: A handling mechanism of a gearshift which enable to shift endlessly into neutral, first-speed, second-speed, third-speed, fourth-speed, fifth-speed, neutral, first-speed, second-speed, third-speed, fourth-speed, fifth-speed for example can be used for the wire-typed and lot-typed transmission. The gearshift handling mechanism can be shifted endlessly and mechanically into neutral, first-speed, second-speed, third-speed, fourth-speed, fifth-speed, neutral, first-speed, second-speed, third-speed, fourth-speed, fifth-speed for example via the operation lever which is moved in the forward-backward direction.

Abstract: A multistage transmission for an internal combustion engine has a disconnect-type clutch, a drive shaft and a driven shift on which engaged gear wheels are arranged to achieve different gear steps. Clutches actuated via shift forks are used to move the speed gears to generate a frictional connection with the gear shaft. The gear change is effected by a control cable and/or gearshift linkage. The gear pairs for the even gears and for the odd gears are arranged side-by-side like a dual clutch gear set. To implement an H shift pattern to actuate the clutches of the even gears and the odd gears a shifter shaft is provided, respectively. The two shifter shafts can be controlled via a common selector and/or shift control system.

Abstract: An automatic transmission includes primary drive gears that are fixed on main-shaft sleeve provided on a main shaft; primary driven gears which are rotatably provided on a countershaft, which constantly mesh with the primary drive gears, and which are selectively connected to the countershaft. Further, a first clutch engages and disengages power between the main shaft and the main-shaft sleeve; and secondary drive gears are rotatably provided on the main shaft, and are selectively connected to the main shaft. Secondary driven gears which are fixed on a countershaft sleeve provided on the countershaft, and which constantly mesh with the secondary drive gears. A second clutch engages and disengages power between the countershaft and the countershaft sleeve. A parking lock position is established when clutches are disengaged and one forward gear and a reverse gear are concurrently connected to the countershaft.

Abstract: A shift drum apparatus is reduced in weight relative to conventional shift drums. The shift drum includes a shift fork, a shift drum main body, and a lid member. The shift fork is slidably mounted on a shift fork support shaft. The shift fork changes a gear position of a transmission mechanism. The shift drum main body is formed into a hollow cylindrical shape. The shift drum main body has an end face on a first side thereof in a cylindrical axis direction that is open to form an opening portion. The shift drum main body further includes a cam groove formed on an outer circumferential surface thereof. An end portion of the shift fork is fitted in this cam groove to allow the shift fork to slide. The lid member is disc-shaped and mounted by being press-fitted in the opening portion of the shift drum main body.

Abstract: An indexing and braking mechanism for a manual transmission having a shifting mechanism and at least one rotatable drive shaft is disclosed. The mechanism includes an indexing mechanism for controlling movement of the shifting mechanism between at least a first position and a neutral position. The indexing mechanism has a plate having a plurality of notches formed thereon, wherein one notch corresponds to the first position and another notch corresponds to the neutral position. A locking mechanism is provided for selectively limiting movement of one of the at least one rotatable drive shaft. The locking mechanism is adapted to selectively engage the plurality of notches to selectively maintain the indexing mechanism in one of the first position and the neutral position. The locking mechanism includes an indexing lever having a contact surface for contacting the rotatable drive shaft.

Abstract: An electronic gearshift device of a transfer case assembly for a four wheel drive vehicle is provided. The electric gearshift device comprises a motor, a camshaft rotatably driven by the motor, a rail member separated from the camshaft by a predetermined distance and positioned parallel to the camshaft; first and second forks installed on the rail member such that they are spaced apart from each other, and a cam fitted around and supported by the camshaft to selectively operate the first or second forks on the rail member to thereby effect gearshift.

Abstract: A gear shifting system for idler wheels (3) comprising sliding sleeves (2), which are connected torsion-resistant with a main shaft (1) and can be connected form-locking with an idler wheel (3) to be shifted via axial displacement. Actuation of the respective sliding sleeve (2) is provided through at least one adjusting unit (4), which selects an actuator such that a shifting actuation of the respective sliding sleeve (2) is possible.

Abstract: The invention relates to a speed change gear drive for a transmission that can miniaturize an engine by improving the layout of parts. In particular, the invention relates to a speed change gear drive in which a change spindle is supported by a transmission case and a shift drum supported by the transmission case so that the shift drum can be rotated is driven by the turning of a change arm fixed to the change spindle, a shift fork the position of which is changed by the rotation of the shift drum and a shift fork rod that supports this shift fork are provided, and the change spindle and the shift fork rod are overlapped when the body of an engine is viewed from the side.

Abstract: The cartridge type transmission is a transmission configured to be detachable and attachable from/to the crankcase, the main shaft is arranged on the cut surface BF of the crankcase, and the change spindle and the shift fork shaft are pivotally supported in the upper crankcase, which is positioned on the upper side of the cut surface BF. The counter shaft is pivotally supported in the lower crankcase, which is positioned on the lower side of the cut surface BF.

Abstract: A power transmission for a motor vehicle. The transmission includes a plurality of transmission ratio steps defined by pairs of gear carried on parallel shafts, and final output mechanisms for engaging desired transmission ratio steps. The final output mechanisms are operable for controlling the engagement of respective transmission ratio steps to minimize tractive force interruption by allowing rapid gear changes to be effected to reduce the times between shifts of gears. By sensing accelerator pedal position and vehicle speed a new transmission ratio step to be subsequently engaged can be pre-selected while an engaged gear remains engaged.

Abstract: A shift device for an inline transmission, comprising a shift shaft which is rotated during selection movements and is offset axially during shift movements, a plurality of shift members each of which being mounted movable or pivotably in the axial direction, for the actuation of at least one assigned shift clutch, a plurality of shift fingers which are secured to the shift shaft and extend in each case towards one side, each shift finger being assigned to one of the shift members and being arranged in such a way that, in a defined rotary selection position of the shift shaft, the shift finger is coupled axially to its assigned shift member, in order to drive the shift member during an axial movement of the shift shaft, and a blocking device for preventing two or more gears of the transmission from being shifted simultaneously, the blocking device having a plurality of individual blocking elements mounted fixedly with respect to the casing.