| 摘要 |
An activation means for use in portable trommels adapted to move parts of a conveyor between a number of pre-defined positions. In one embodiment of the invention, the activation means comprises a hydraulic ram assembly that consists of a single hydraulic ram pivotally coupled at one en d to the chassis of a trommel, and pivotally coupled at the other end to at least one of a number of mechanical linkages. The mechanical linkages are configured to link the hydraulic ram and at least two parts of a trommel conveyor, such th at in operation, the hydraulic ram can move the parts of the trommel conveyor between (a) a first, lowered, extended, operational position; (b) a second, raised, extended, operational position; and (c) a third, folded, retracted position, suitable for transportation.
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