| 摘要 |
A power shift mechanism for causing a clutch to be disengaged by the power of the shaft of the transmission. In other words the mechanism is shifted out of gear under its own power and with little effort on the part of the operator. The mechanism is particularly useful in clutching arrangements for feed rolls of a forage harvester for example, when the rolls become clogged with an excess or slug of material and it is otherwise difficult to shift the clutch out of engagement. The mechanism includes a shifting assembly which first acts to shift a cam means out of the way to a position that permits the shiftable clutching part to be engaged and reverse feed roll direction, and then acts to permit the cam means to cause the shiftable part of the clutch to be forcibly disengaged due to the power of the shaft on which it is splined.
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