Drive system for hydraulic motors for driving the wood feed elements of the de-stating and separating head of a forest harvesting machine

摘要

The invention relates to a drive system (100) for hydraulic motors (1, 2, 3, 4) for driving the timber feed elements (d SUB 1 / SUB, d SUB 2 / SUB, d SUB 3 / SUB, d SUB 4 / SUB) of the de-stating and separating head (M) of a forestry harvester. The drive system (100) has at least one multicapacity motor (1, 2) for driving a feed roller (d SUB 1 / SUB, d SUB 2 / SUB) or the like and at least one second associated hydraulic motor (3 , 4) for driving a feed roller (d SUB 3 / SUB, d SUB 4 / SUB) or the like for loading wood. In the system (100), the multicapacity motor (1, 2) comprises a drive system (100) having as drive mode either full revolution volume (Va SUB 1 / SUB + Va SUB 2 / SUB) or sub-revolution volume (Va SUB 1 / SUB) can be selected, wherein with the multi-capacity hydraulic motor (1, 2) motor sections (Va SUB 1 / SUB, Va SUB 2 / SUB) are connected from one of which is connected in series with the relevant second hydraulic motor (3, 4) and eikapazitätsmotors (1 or 2) with a pump (P SUB 1 / SUB) can be connected in such a way that the second hydraulic motor ( 3, 4) is bypassed by the oil flow. The system (100) has an actuating connection of the partial volume of the multi-capacity motor-producing motor section (Va SUB 1 / SUB) from its pressure line (A SUB 1 / SUB) to a first operating mode controlling actuator (50 ), such that, when the pressure in the respective section in the pressure line (A SUB 2 / SUB) falls below a certain pressure limit value, ...