Provided is a method of setting a neutral position of each speed-range shift rail for accurate gear-shifting in a transmission gear actuator. The method includes a reference neutral position determination step of determining a reference neutral position as an absolutely neutral position by reciprocating a shift finger in a free-range shift rail, and a speed-range neutral position determination step of determining a neutral position of each speed-range shift rail by reciprocating a control finger in the speed-range shift rail. Since the neutral position of each speed-range shift rail is set through the above method, it is possible to perform more accurate gear-shifting and prevent incomplete gear engagement by performing the gear-shifting at the neutral position of each speed-range shift rail.

A gear selection and shifting actuating mechanism and a gear selection and shifting actuating method, the actuating mechanism comprising a gear shifting motor, a first transmission gear, second transmission gears, gear shifting screws, a push block, a shift fork, a shift block and a linear driving device. An output shaft of the gear shifting motor is provided thereon with the first transmission gear; the first transmission gear is engaged with the second transmission gears; the second transmissions gears are fixedly connected to the gear shifting screws; the gear shifting screws are in screw thread connection with the push block; the push block is provided thereon with a through hole; one end of the shift block is connected to the linear driving device, and the other end is aligned with a groove on the shift fork after inserting into the through hole. The linear driving device that corresponds to a shift position drives the shift block to be inserted into the shift fork so as to shift gears; the gear shifting motor drives the first transmission gear to rotate and thus drives the second transmission gears to rotate; the second transmission gears drive the gear shifting screws to rotate and drive the push block to move; and the push block shifts the shift fork by means of the shift block to shift gears.

A gearbox for a motor vehicle, includes multiple gears, a housing, an interior space enclosed by the housing, a gearshift clutch located in the interior space, through which a gear can be shifted, and a shifting device for transmitting an external actuating force acting outside the housing for shifting to the gearshift clutch, the shifting device having an inner shifting part in the interior space, a first introduction element which engages through a first opening provided in the housing for guiding the external actuating force to shift the gear to the inner shifting part, a shifting mass arranged outside the housing which is moved during gear shifting, and a connecting element different from the first introduction element with which the shifting mass is connected to the inner shifting part, the connecting element engaging through a second opening different from the first opening in the housing into the interior space.

An actuator device for a gearbox of a motor vehicle includes a plurality of selector shafts displaceable in a first direction between a plurality of selection positions and in a second direction between a plurality of shifting positions and which each have a connecting element that is operatively-connected in at least one of the selection positions with at least one selector rail of the gearbox for transferring a movement of the selector shaft in the second direction onto the selector rail. The selector shafts are mounted relative to each other to be movable relative to one another in the first direction and are fixed to relative to each other in the section direction The selection positions of the selector shafts are independently adjustable by of a plurality of first adjusting elements and wherein the selector shafts can be displaced together between the shifting positions by means of a second adjusting element.

An actuator device for a gearbox of a motor vehicle includes a plurality of selector shafts displaceable in a first direction between a plurality of selection positions and in a second direction between a plurality of shifting positions and which each have a connecting element that is operatively-connected in at least one of the selection positions with at least one selector rail of the gearbox for transferring a movement of the selector shaft in the second direction onto the selector rail. The selector shafts are mounted relative to each other to be movable relative to one another in the first direction and are fixed to relative to each other in the section direction The selection positions of the selector shafts are independently adjustable by of a plurality of first adjusting elements and wherein the selector shafts can be displaced together between the shifting positions by means of a second adjusting element.

A dual clutch transmission may include a first input shaft having a plurality of odd stage driving gears; a second input shaft disposed to have a concentric shaft with the first input shaft and including a plurality of even stage driving gears; an output shaft; a counter shaft disposed parallel to the first input shaft, the second input shaft, and the output shaft to continuously transfer power to the output shaft and including odd stage driven gears engaged with the odd stage driving gears and even stage driven gears engaged with the even stage driving gears; a plurality of synchronous devices; a plurality of shift forks coupled to the plurality of synchronous devices; and one shift rail provided to commonly guide a linear sliding of the plurality of shift forks.

A shift drum has a recess which controls a fork to move one of two cooperating coaxially arranged gears for transmitting torque in a power train of a vehicle. The recess includes a straight section, which upon rotation of the shift drum does not move the fork either to the left or the right, and at least one ramp which does move the fork in one direction (i.e., to the left or the right). The ramp is more complex than a single line, such as having a first portion at a first right-shift portion ramp angle and a second portion at a second right-shift portion ramp angle , perhaps with the intersection between the first right-shift portion ramp angle and the second right-shift portion ramp angle being at the mid-line defined by the straight section of the recess.

The present invention relates to a gear shift arrangement (100) for a transmission arrangement of a vehicle, the gear shift arrangement comprising an axially movable first connecting mechanism (102) connectable to a first gear wheel for engagement of a first gear of the transmission arrangement; an axially movable second connecting mechanism (104) connectable to a second gear wheel for engagement of a second gear of the transmission arrangement; an actuator arrangement (106) configured to controllably connect the first connecting mechanism (102) and the first gear wheel to each other, and to controllably connect the second connecting mechanism (104) and the second gear wheel to each other, wherein the first connecting mechanism (102) comprises a first connector element (108), the second connecting mechanism (104) comprises a second connector element (110) and the actuator arrangement (106) comprises an actuator connector element (112), wherein the second connector element (110) at least partially enclosing the actuator connector element (112), and the actuator connector element (112) at least partially enclosing the first connector element (108), wherein the gear shift arrangement (100) further comprises means (114) for selectively connecting the actuator connector element (112) to the first (108) and second (110) connector elements.

An interrocker assembly for a transmission includes at least two shift forks for actuating gears in the transmission, each of the at least two shift forks being pivotal and having an end offset relative to each other, at least two actuators cooperating with the at least two shift forks, one of the at least two actuators cooperating with one of the at least two shift forks, and an interrocker being pivotally movable and cooperating with each of the at least two shift forks to securely prevent two gears from being engaged at the same time.

An interrocker assembly for a transmission includes at least two shift forks for actuating gears in the transmission, each of the at least two shift forks being pivotal and having an end offset relative to each other, at least two actuators cooperating with the at least two shift forks, one of the at least two actuators cooperating with one of the at least two shift forks, and an interrocker being pivotally movable and cooperating with each of the at least two shift forks to securely prevent two gears from being engaged at the same time.