| 摘要 |
The invention concerns an articulated arm (8) of a bush cutter fixed to a platform (49) integral with a tractor (9), consisting of an assembly of four manoeuvring devices (11, 12, 13, 14) and supporting a cutting tool (10) for mowing grass, cutting shrubs or pruning; the manoeuvring devices (11, 12, 13, 14) having a respective main direction (53, 62, 74, 75), consisting of a tubular structure comprising at one of their ends (57, 61, 69, 73) a motorised shaft perpendicular to the main direction (53, 62, 74, 75); each motorised shaft of the manoeuvring devices (11, 12, 13) enabling the pivoting of the manoeuvring device (11, 12, 13) to which it is secured; the manoeuvring device (14) enabling the pivoting of the cutting tool (10); said manoeuvring devices operating by means of a fluid at medium pressure while the cutting tool is generally powered by high pressure hydraulic fluid; the set of fluids circulating in the pipes within the manoeuvring devices.
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