| 摘要 |
These drive connections with freewheel mechanisms, especially provided for advancing and reversing operation of all-wheel vehicles, have at their disposal fully self-acting reversing shift rings (13) depending exclusively on the respective direction of rotation of the shafts (1, 2) serving as sensors of direction of rotation (22) after the reversal operation there are provided locking elements that become entirely free from torque transmission and have controlling forces dependent on direction of rotation (helical toothing, tiltable ratchets, detent balls, etc.) on a shift ring (13) which is movable by the sensor of direction of rotation (22). Longitudinal or rotational displacements of the shift ring (13) as result of dragging by the sensor of direction of rotation (22) upon change in direction of rotation always self-acting come into gear on these coupling toothings (13, 14, 29) mounted on the output side with countertoothings (12, 31, 45) of toothing bodies (30) non-rotationally held on the output shaft (2) in a manner such that each time only the freewheel direction of rotation corresponding to the torque direction if locked. Said clutch toothings (13, 14, 29, and 12, 31, 45) in addition can be optionally kept open by means of a servo actuator cylinder (43/48) for operations such as braking where any freewheel action must be switched off in order, for instance, to allow every time the brake torques of all axles also fully to retroact reliably on the engine.
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