| 摘要 |
The present invention discloses a dynamic counterweight mechanism for unilateral sprayers, comprising a conventional sprayer having a reservoir for agrochemical compounds, a pump for the chemical solution stored in the reservoir, a hydraulic pump for driving a structural system comprising a frame and bars, said system being balanced by the counterweight element, and all the aforementioned elements being disposed upon a chassis. In accordance with the present invention, the mechanism (100) is assembled so as to be upwardly and downwardly displaced relative to the frame (3) fixedly and vertically attached to the chassis (2), said mechanism (100) comprising a movable frame (20) which laterally supports a counterweight module (30). An oscillating module (40) is pivotally mounted at the opposite lateral portion (23) of the movable frame (20), which pivots about a bearing (24, 43), and relative to the movable frame (20), the upper end thereof being interconnected to the counterweight modul e (30) by a steel cable (33). The counterweight mass thereof is upwardly and downwardly moved according to the displacement of the oscillating module (40), said suspended mass being supported by a steel cable (33) fixed to the counterweight (32), and extended across a pulley system (50, 51, 52 and 53) between the oscillating module (40) and the movable frame (20). The counterweight module (30) comprises at least an adjustable traction spring (34, 35), a first end thereof being connected to both the oscillating module (40) and the movable frame (20, 21). The angular displacement of the oscillating module (40) is dampened by progressive action dampeners (25), which are assembled to the movable frame (20, 26). A movable square arrangement (60) is an integral part of the counterweight mechanism (100), which is mounted at the fore portion thereof and adjacent the oscillating module (40), said square arrangement (60) supporting an air system (70) which is a part of the spraying bar assembl y (4), and being supported by base support horizontal profiles of the oscillating module (40), and pivotally attached to the vertical profile (21) by a vertical axle (43) disposed thereon, said square arrangement (60) angularly rotating about said axle (43) in a transversal plane relative to the oscillating module (40). The angular displacement of the square arrangement (60) is also dampened at both ends thereof by rubber dampeners.
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