Abstract: A shifting assembly for shifting the reverse gear of a variable-speed gearwheel transmission. The shifting assembly comprises a reverse-gear gearwheel mounted to rotate on a transmission shaft which has a first tooth array. A clutch body, that is rotationally fixed to the transmission shaft which has a second tooth array, is associated with the reverse-gear gearwheel. The first and the second tooth arrays are axially forced into engagement in order to engage the reverse gear. A synchronizer ring, connected to the reverse-gear gearwheel, has a friction surface which engages another mating friction surface during synchronization. The synchronizer ring and the reverse-gear gearwheel can rotate relative to one another by a limited angular amount between a blocking position and a through-connection position. A stressing element, arranged between the synchronizer ring and the reverse-gear gearwheel, pre-stresses the synchronizer ring relative to the reverse-gear gearwheel in the direction of a blocked position.

Abstract: A dual-clutch group transmission having splitter, main and range groups. The range group is a planetary transmission with a ring gear, a sun gear and planetary gears that are supported by a carrier. Inner and outer transmission input shafts are connected to a respective first and second clutch. A main transmission shaft and shifting elements for engaging gears or forming frictional connections. Power-gearshifts, involving a shift of the range group, are enabled because the inner input shaft can be directly connected, via a shift element, to the main shaft. A hollow shaft extends coaxially over the main shaft and supports a loose wheel of a forward gear of the main group. The wheel can be rotationally fixed, via a shift element, to the hollow shaft which can be connected to the main shaft and the carrier by respective shifting elements.

Abstract: An arrangement of a gear (2) on a main shaft (1) of a transmission having at least two countershafts (3, 4). The gear (2) is designed as a summation gear or gear wheel, and the gear (2) is connected to the countershafts, in a rotationally drivable manner, and is disposed radially movable between the two countershafts (3, 4). The arrangement has a damping bush (5) which is disposed between the gear (2) and the main shaft (1). The damping bush (5) comprises a hard outer sliding ring (6) and an elastomeric part (7) that is in fixed connection to an inwardly facing surface of the outer sliding ring (6).

Abstract: A configuration of a gear wheel (4, 5) on a main shaft (1) of a transmission, having at least two lay shafts (2, 3). The wheel (4, 5) is designed as a sum wheel or gear wheel, meshes with both of the lay shafts (2, 3), and is movable in the radial direction between lay shafts (2, 3). An elastic element (8, 13) is positioned, between the gear wheel (4, 5) and the main shaft (1), and/or between the gear wheel and the lay shaft to reduce radially movement of the gear wheel (4, 5).

Abstract: A dual-clutch group transmission having splitter, main and range groups. The range group is a planetary transmission with a ring gear, a sun gear and planetary gears that are supported by a carrier. Inner and outer transmission input shafts are connected to a respective first and second clutch. A main transmission shaft and shifting elements for engaging gears or forming frictional connections. Power-gearshifts, involving a shift of the range group, are enabled because the inner input shaft can be directly connected, via a shift element, to the main shaft. A hollow shaft extends coaxially over the main shaft and supports a loose wheel of a forward gear of the main group. The wheel can be rotationally fixed, via a shift element, to the hollow shaft which can be connected to the main shaft and the carrier by respective shifting elements.

Abstract: A double clutch transmission of a motor vehicle with a first input shaft (W1) formed as a hollow shaft and a longer, second input shaft (W2) arranged coaxially inside the first input shaft (W1). Each of input shaft is in driving connection, by way of an associated input constant (EK1, EK2), with at least one countershaft (W3a, W3b) arranged axis-parallel to the first and the second input shafts (W1, W2). To avoid jamming of the gearteeth (4, 5a, 5b; 6, 7a, 7b) of the respective, non-load-transmitting input constant (EK1, EK2), the fixed wheel (6), arranged on the associated input shaft (W2) in at least one of the input constants, is arranged in a rotationally fixed manner by first carrier gearteeth (19) on a support sleeve (20) which, in turn, is connected in a rotationally fixed manner by second carrier gearteeth (21, 21?) to the input shaft (W2) concerned.

Abstract: A shifting device and a method controlling shifting of transmission comprising main gearing and a splitter group which have a common countershaft. The splitter group is a double clutch transmission having two coaxially disposed input shafts, each of which can be connected, on the input side, to a motor drive shaft and, on the output side via a shiftable input stage, to the countershaft. Each input shaft of the shifting device is allocated a shift rail. Each shift rail is axially parallel and axially displaceable and is adjustably connected to the selector sleeve of an allocated shifting group via a shift fork and has engagement openings. A selector shaft is axially parallel to the shift rails and comprises selector fingers which engaging in the engagement openings of the shift rails. The selector shaft rotates, via a selection actuator, and is axially displaced, via a shifting actuator.

Abstract: A multi-group transmission (1) is proposed, comprising a gearbox actuator, in which an exhaust channel (3) is provided in the gearbox housing (2), said channel extending from a gearbox compartment (4) provided on the gearbox housing (2) for the installation of the gearbox actuator, to the output sensor (5), whereby the gearbox compartment (4) also serves as a collecting chamber for exhaust air.

Abstract: A shifting assembly for shifting the reverse gear of a variable-speed gearwheel transmission. The shifting assembly comprises a reverse-gear gearwheel mounted to rotate on a transmission shaft which has a first tooth array. A clutch body, that is rotationally fixed to the transmission shaft which has a second tooth array, is associated with the reverse-gear gearwheel. The first and the second tooth arrays are axially forced into engagement in order to engage the reverse gear. A synchronizer ring, connected to the reverse-gear gearwheel, has a friction surface which engages another mating friction surface during synchronization. The synchronizer ring and the reverse-gear gearwheel can rotate relative to one another by a limited angular amount between a blocking position and a through-connection position. A stressing element, arranged between the synchronizer ring and the reverse-gear gearwheel, pre-stresses the synchronizer ring relative to the reverse-gear gearwheel in the direction of a blocked position.

Abstract: A vehicle transmission having a housing (5) with a region in which a connection plate (7) can be firmly attached. The connection plate includes areas for receiving at least parts of the actuating elements, which actuate the torque-transmitting components, and/or parts of the actuating elements, which actuate a transmission shifting device. At least one required actuating cylinder (3) is formed by a first cylinder part, that is located within the connection plate, and a second cylinder part, that is located within the transmission housing. A stop ring (10), provided in the cylinder (3), is configured in such a way that the sealing contact surfaces of a piston (2), in the transmission housing and/or the connection plate, are formed by a bushing-shaped expansion (10?, 10?) of the stop ring (10).

Abstract: A shifting device (1) for a transmission with a selection actuator and a shifting actuator, which a shifting shaft (2) comprising shifting forks (3) or selector forks, which engage in sliding collars for engaging the gears in which the shifting motion can be carried out by way of an axial motion of the shifting shaft (2), while the selection motion is kinematically disengaged from the shifting motion and the shifting shaft (2) does not rotate during the selection motion.

Abstract: A shifting device (1) for a transmission with a selection actuator and a shifting actuator, which a shifting shaft (2) comprising shifting forks (3) or selector forks, which engage in sliding collars for engaging the gears in which the shifting motion can be carried out by way of an axial motion of the shifting shaft (2), while the selection motion is kinematically disengaged from the shifting motion and the shifting shaft (2) does not rotate during the selection motion.

Abstract: A configuration of a gear wheel (4, 5) on a main shaft (1) of a transmission, having at least two lay shafts (2, 3). The wheel (4, 5) is designed as a sum wheel or gear wheel, meshes with both of the lay shafts (2, 3), and is movable in the radial direction between lay shafts (2, 3). An elastic element (8, 13) is positioned, between the gear wheel (4, 5) and the main shaft (1), and/or between the gear wheel and the lay shaft to reduce radially movement of the gear wheel (4, 5).

Abstract: A vehicle transmission is proposed, whose housing (5) comprises a region in which a connection plate (7) that can be firmly attached to the housing (5) is provided, said connection plate comprising receiving areas for at least parts of the actuating elements for actuating the torque-transmitting components and/or parts of the actuating elements for actuating the shift device of the transmission, wherein the at least one required actuating cylinder (3) is formed by a first cylinder part that is provided in the connection plate (7), and by a second cylinder part that is provided in the transmission housing (5), wherein the stop ring (10) provided in the cylinder (3) is configured in such a way that the sealing contact faces of the piston (2) in the transmission housing (5) and/or in the connection plate (7) are formed by a bushing-shaped expansion (10?, 10?) of the stop ring (10).

Abstract: A coupling device of a motor vehicle with a clutch arranged in the force flow between a drive motor and a transmission and a dedicated servo-assisted control mechanism. The clutch is designed by way of a pressing spring as a passively lockable and via a clutch release sleeve disengageable and insertable dry friction coupling and the control mechanism includes an operative primary drive between a clutch pedal and the clutch release sleeve and a pneumatically operative servo drive with a pneumatic actuator ordered immediately to the clutch release sleeve and with a control valve controllable by the clutch pedal.

Abstract: A transmission brake (1) is described, where one transmission shaft (3) can be braked to carry out an upshift operation. The aim of the invention is to provide a transmission brake that is devoid of any hydraulic or pneumatic actuation device and that requires very little axial installation space. Such a transmission brake (1) has one electromagnetic actuation device (6, 7, 8) with which the friction elements (4, 5) of the transmission brake (1) can be pressed against each other for actuating the brake.

Abstract: A multi-group transmission (1) is proposed, comprising a gearbox actuator, in which an exhaust channel (3) is provided in the gearbox housing (2), said channel extending from a gearbox compartment (4) provided on the gearbox housing (2) for the installation of the gearbox actuator, to the output sensor (5), whereby the gearbox compartment (4) also serves as a collecting chamber for exhaust air.

Abstract: A multi-group transmission is proposed, said transmission comprising a gearbox actuator, in which the working cylinder of the activating devices of the gearbox actuator, the required air channels (2), and the clutch actuator (4) are integrated into the gearbox housing (3).

Abstract: A shift-assist device for a manually shiftable manual transmission by which the gear shift shaft or a shift fork of the shifting apparatus of the transmission is axially movable to assist shifting. The gear shift shaft (16) or the shift fork (19) of the shift facility of the transmission can be moved axially for shifting the selected gear as a function of force exerted by the driver on the shift lever (18).

Abstract: A design for a device for the reduction of movement of the main shaft (6) in the disengaged position in a transmission with at least two countershafts in which there is an axial transfer of forces between the drive shaft (7) and the main shaft (6) which is coaxially arranged through a connection of the main shaft (6) with a part of the axial bearing (13) on the drive shaft (7). There is a device (2) which is used to load the main shaft (6) against the drive shaft (7) through a loading of the part of the axial bearing (13) connected to the main shaft (6) against other parts or against the axial bearing (4) on the drive shaft (7).