| 摘要 |
In a service system for wood-splitting machines which comprise a region (5) for resting the wood pieces (6) to be split, two means arranged to mutually withdraw from and approach said region and acting as an anvil (8) and a blade (7), and a single-acting hydraulic cylinder-piston unit (9) for retracting and extending said means and operated by a hydraulic power unit (13) the circuit of which comprises at least one two-way valve feeding oil to the cylinder-piston unit and a maximum pressure valve, the hydraulic circuit comprises a single valve provided with a valving element (21) operable by a single lever by way of interposed elastic means, said valve feeding oil from the power unit to the cylinder-piston unit when the valving element is in the closed position, and recirculating oil from the power unit to the tank when the valving element is in the open position. <IMAGE> |
