| 摘要 |
<p>A power take-off drive line for a tractor including a drive shaft (10), a driven shaft (11) with which an implement may be connected, a disengageable PTO clutch (C) for connecting and disconnecting drive between the drive and driven shafts, a bearing (16) for supporting the driven shaft (11) for rotation, and a driven shaft brake (16', 23). The brake operates by increasing the frictional resistance within the bearing (16), thus inhibiting any tendency of the driven shaft to rotate when the clutch is disengaged due to drag in the clutch or elsewhere in the drive line. The bearing may include rollers disposed between inner and outer cages and a fluid pressure operated piston (23) arranged to axially displace one of the cages (16') to increase bearing friction to provide the desired braking effect.</p> |
