Razvoj tresača sa hvatačem za stabla syzygium cumini na nožni pogon

The objective of this research work was to develop a pedal operated tree shaker for jamun (Syzygium cumini) fruit harvesting. The prototype machine was constructed and tested on jamun fruit. The tree shaker was powered by manually foot pedal. The output power of the foot pedal was transmitted through a steel wire rope, where it was converted to a reciprocating motion. The eccentricity of the mechanism was constant to provide stroke lengths of 160 mm. The slider motion was transmitted to the shaker clamp to generate the inertia forces to shaking of the branch. The study included frequency and amplitude to obtain maximum fruit removal percentage, harvesting rate of shaker and physical properties of jamun fruit. Harvesting rate was calculated by weighing both the harvested and unharvested jamun. During the test, the limb of tree was attached to a clamp, which was reciprocated at 160 mm amplitude through steel wire rope (4 mm in diameter) and pedal assembly. The frequency of reciprocation was varied from 40, 50, 60, 70, 80 and 90 cpm respectively. The results were recorded to the maximum fruit removal percentage. Maximum fruit removal percentage was observed to 80-90% by operating the tree shaker at amplitude of 160 mm and a frequency of 90 cpm.Cilj ovog istraživanja bio je da razvije tresač sa pogonom od pedala za berbu jamuna (Syzygium cumini). Prototip mašine je konstruisan i testiran na voću jamun. Tresač ima pogon od nožnih pedala. Izlazni pogon sa pedala je prenet čeličnim užetom i pretvoren u oscilatorno kretanje. Ekscentrični mehanizam je konstantno proizvodio oscilacije sa hodom od 160 mm. Kretanje klizača je preneto na hvatač tresača da generiše inercijalne sile za trešenje grane. Studija je uključila frekvenciju i amplitudu za postizanje maksimalnog procenta skidanja voća, norme ubiranja tresača i fizičkih svojstava voća. Norma ubiranja je izračunata merenjem ubranih i neubranih plodova. Tokom testiranja, grana drveta je stezana hvatačem koji je oscilovao sa amplitudom od 160 mm preko čeličnog užeta (prečnika 4 mm) i sklopa pedala. Frekvencija oscilovanja je iznosila 40, 50, 60, 70, 80 i 90 min-1, redom. Rezultati su praćeni pri maksimalnom procentu skidanja plodova. Maksimalni zabeleženi procenat skidanja iznosio je 80-90% pri radu tresača sa amplitudom od 160 mm i frekvencijom od 90 min-1