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A steering mechanism for a tracked vehicle wherein a motor-operated gear is arranged to rotate two planetary gear components in opposite directions. A single input shaft drives two planetary gear systems at different speeds and/or different directions to achieve a vehicle steer action. The mechanism

A steering mechanism for a tracked vehicle wherein a motor-operated gear is arranged to rotate two planetary gear components in opposite directions. A single input shaft drives two planetary gear systems at different speeds and/or different directions to achieve a vehicle steer action. The mechanism is compactly arranged so that the control gearing is centered on the input shaft axis.

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A steering mechanism for a tracked vehicle, comprising: a gear box hving two opposed walls; a shaft means for mounting gears within the gear box, the shaft means including an inwardly projected sleeve mounted inside the gear box on each of the opposed walls and a power input shaft passing through th

A steering mechanism for a tracked vehicle, comprising: a gear box hving two opposed walls; a shaft means for mounting gears within the gear box, the shaft means including an inwardly projected sleeve mounted inside the gear box on each of the opposed walls and a power input shaft passing through the sleeves; first and second planetary gear sets in the gear box rotatable about the input shaft, a first rotatable member from each set concentrically mounted on the input shaft in the central zone of the gear box, the first rotatable members being in adjacency with one another; output shafts parallel to the input shaft passing through the opposed walls, a first output shaft rotatably connected to the input shaft by first output gear mounted on the first output shaft and the first planetary gear set, a second output shaft connected to the input shaft by a second output gear mounted on the second output shaft and the second planetary gear set; each planetary gear set having a drive gear concentrically mounted on one of the sleeves of the gear box for driving one of the output gears; a steering motor mounted on the gear box; a steering motor gear driven by the steering motor for engaging first rotatable member in each planetary gear set so as to control the relative rotational speeds between two selected elements of each planetary gear set.