| 摘要 |
The present invention relates to an actuator device for aiding the hitching of an implement (1) to the three-point linkage of a tractor (2) or similar pulling vehicle. According to the invention, the actuator device comprises a double-acting hydraulic cylinder (5), which is mountable between two pulling links (3) of the tractor's three-point linkage for controlled adjustment of the mutual distance between the pulling links (3), and said hydraulic cylinder (5) is connectable to a two-way directional control valve bank (4) of the hydraulic system of the tractor. To avoid mechanical overload of the pulling links (3), the cylinder (5) is manufactured with a piston clearance providing an internal bypass flow path.
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