Patent ES-8601037-A1 (ES)
Title: Driveline for a track-laying vehicle.
IPC: B62D11/18
Filed: 1984-08-25
Abstract: The drive line for a tracked vehicle has first and second track drive shafts driven by an engine output transmission (200) via first (12) and second (13), summing epicyclic gears. The latter each have a first input driving the transmission and an output driving a respective track drive shaft. There is also a continuously variable ratio steering transmission (100), with an input adapted to be driven by the engine. - A third summing epicyclic gear has a first input to be driven by the engine, a second input connected to an output of the continuously variable steering, and an output driving a second input to the first summing epicyclic gear via suitable gearing. The output of the continuously variable ratio steering transmission also drives a second input to the second summing epicyclic gear.  (2/2) EPAB- EP-137264 B The drive line for a tracked vehicle has first and second track drive shafts driven by an engine output transmission (200) via first (12) and second (13), summing epicyclic gears. The latter each have a first input driving the transmission and an output driving a respective track drive shaft. There is also a continuously variable ratio steering transmission (100), with an input adapted to be driven by the engine. - A third summing epicyclic gear has a first input to be driven by the engine, a second input connected to an output of the continuously variable steering, and an output driving a second input to the first summing epicyclic gear via suitable gearing. The output of the continuously variable ratio steering transmission also drives a second input to the second summing epicyclic gear.  (11pp Dwg.No.2/2) - EP-137264 B A driveline for a track laying vehicle, of the speed shaft (8) steering type, including first (30) and second (20) track drive shafts, a drive transmission (200) adapted to be driven by the vehicle engine, first (6) and second (7) summing epicyclic gears each with a first input (63, 73) driven by the drive transmission and an output (62, 72) driving a respective track drive shaft and a third summing epicyclic gear (5) having a first input (53) adapted to be driven by the engine and a component (52) driving a second input (61) to the first summing epicyclic gear via suitable gearing (54, 55), characterised in that a continuously-variable-ratio steering transmission (100) has an input (9) which is adapted to be driven by the engine and an output (8) which provides second inputs (71, 51) to the second (7) and third (5) summing epicyclics respectively.  (6pp) USAB- US4569251 A The track-laying vehicle driveline includes a propulsion transmission (200) and a steer transmission (100), both driven from the engine crankshaft (1). Both are of the toroidal race-rolling traction type continuously-variable ratio transmissions. - An arrangement of epicyclic gears (12, 13) and clutches (H, C1, C2) transmits drive from the propulsion transmission in four regimes to summing epicyclic gears (6, 7) associated with left- and right-hand tracks. Steering of the tracks is achieved by summing the drive, in the summing epicyclic gears, from the steer transmission.