Abstract: A planetary transmission having a continuously variable transmission ratio. The transmission includes two sun wheels having sun wheel circumferential surfaces, and that are axially spaced and rotatable independently of each other around the same axis of rotation. A ring wheel is situated on the same axis as the sun wheels and has an internal circumferential surface. Planet wheels are provided having planet wheel circumferential surfaces that are in frictional contact with the internal circumferential surface of the ring wheel and the sun wheel circumferential surfaces. A web element is also provided, and the planet wheels are each rotatable about an associated planet wheel axle, which is guided in the web element so that it is movable in the radial direction relative to the transmission longitudinal axis.

Abstract: The invention relates to a transmission arrangement, particularly for a motor vehicle, comprising at least one set of planetary gears and at least one dry clutch or a dry transmission brake. The inventive transmission arrangement allows advantages of the automatic transmission to be combined with the energy-saving clutches and transmission brakes.

Abstract: A power-branched transmission having a plurality of transmission ratio ranges and having a continuously variable transmission ratio. The transmission includes at least one drive shaft operatively connected to an engine with a rotationally fixed connection, a power divider, a variable speed drive, and an output shaft. The power divider is a planetary gear train and the drive shaft is directly coupled with the internal ring gear of the planetary gear train. Also disclosed is a shift system for such a transmission and a variable speed drive unit clutch arrangement.

Abstract: A power-branched transmission having a steplessly adjustable transmission ratio. An input-side distributor transmission includes an input gear that is nonrotatably connected with an input shaft coupled to an engine. The power-branched transmission includes an output shaft and two clutches. The input gear of the distributor transmission is rotatably coupled with an input shaft of a variable speed drive unit. An output gear of the distributor transmission is rotatably engaged with an intermediate shaft that is arranged in a functionally parallel manner relative to the variable speed drive unit and is rotatably engaged with an output shaft of the variable speed drive unit. The intermediate shaft is operatively coupled with the output shaft through a first clutch and the input shaft of the variable speed drive unit is operatively coupled with the output shaft through a second clutch.

Abstract: A power-branched transmission having a steplessly adjustable transmission ratio. An input-side distributor transmission includes an input gear that is nonrotatably connected with an input shaft coupled to an engine. The power-branched transmission includes an output shaft and two clutches. The input gear of the distributor transmission is rotatably coupled with an input shaft of a variable speed drive unit. An output gear of the distributor transmission is rotatably engaged with an intermediate shaft that is arranged in a functionally parallel manner relative to the variable speed drive unit and is rotatably engaged with an output shaft of the variable speed drive unit. The intermediate shaft is operatively coupled with the output shaft through a first clutch and the input shaft of the variable speed drive unit is operatively coupled with the output shaft through a second clutch.

Abstract: The invention relates to a transmission arrangement, particularly for a motor vehicle, comprising at least one set of planetary gears and at least one dry clutch or a dry transmission brake. The inventive transmission arrangement allows advantages of the automatic transmission to be combined with the energy-saving clutches and transmission brakes.

Abstract: The gearbox includes a multi-shaft toothed-wheel planetary gearing and a continuously adjustable hydrostatic transmission having toothed-wheel auxiliary transmission stages and gear-changing clutches. The hydrostatic transmission is associated with a displacement-type machine with constant displacement volume. In the planetary gearing, one shaft forms the input shaft to which the adjustable displacement-type machine is connected. A second shaft of the planetary gearing is connected to the constant-volume displacement-type machine. Third and fourth shafts of the planetary gearing represent coupling shafts. The coupling shafts alternately act via at least two auxiliary transmission stages, also called gears, on the output shaft. The coupling shafts change their speeds in such a manner that one coupling shaft becomes steadily faster and the other one becomes steadily slower. They behave in such a manner that they exhibit equal speeds in one extreme position.

Abstract: In a load change-over gear with infinitely variable transmission, which includes a linkage gear (1) driven by a main drive shaft (5), a control gear (2) associated with the linkage gear (1), as well as a switching or change-over gear (4) series-connected after the linkage gear (1), linkage shafts (10 and 11) can be alternately coupled to the switching gear (4). To create a variable switching logic and to save structural components of the switching gear (4), a superposition gear (3) is series-connected after the linkage gear (1) whose input shaft (14) can be coupled alternately to linkage shafts (10 and 11). Superposition gear (3), in which the main drive shaft rpm can be superposed on the rpm of the input shaft (14), in turn includes a linkage shaft (21) that can be coupled directly to a main output shaft (24) or to the switching gear (4).

Abstract: A hydrostatic-mechanical power-distribution transmission with infinitely variable gear ratio in the hydrostatic branch and several ratios in the mechanical branch, which downstream of the coupling gear has shiftable planetary reduction gears for the purpose of reducing the power contribution of the hydrostatic branch in the starting range.

Abstract: In a superimposed steering gear (3) for tracklaying vehicles in which the steering power needed for turning is superimposed on the drive system via summarizing differentials and which has a hydrostatic-mechanical power branching summed up in a summarizing transmission (31), the power losses of the hydrostatic branch that works with poor efficiency are kept as small as possible and, at the same time, an infinite steering is made possible over all radial ranges. For this purpose, the summarizing transmission (31) is shiftable into steps that cover at least two radial ranges, a speed adaptation to the transmission components taking place at any given time in the shift points for an infinite transition.

Abstract: The gear consists of a four-shaft epicyclic gear, of which one shaft forms the input shaft which is in connection via an infinitely variable hydrostatic gear with the second shaft and of which the two remaining shafts represent connecting shafts which, in an extreme position of the hydrostatic gear, have the same speeds and behave during adjustment of the hydrostatic gear into the other extreme position in such a way that one becomes constantly slower and the other constantly faster, and which alternately act on the output shaft via gears of a gear group with following group shiftings. What is special is that the group shiftings make possible a multiple utilization of the gears of the gear group and that preparatory shifts for changing the group shifting provide the synchronization of idling gear parts, and that each gear change itself takes place at synchronous speeds, free from load and without tractive force interruption.