Análise comparativa do peso específico dos tratores agrícolas fabricados no Brasil e seus efeitos sobre a seleção e uso

Mass of agricultural tractors available in the brazilian market

“…It was found that depending on the type of traction, there were differences among the evaluated brands, as its mass for 2WD and MFWD tractors, power for tractors with MFWD and mass/ power ratio for MFWD and 4WD tractors (Table 1). These results differ from those obtained by SCHLOSSER et al (2005), when analyzing the mass/ power ratio of agricultural tractors sold in Brazil with 2WD and MFWD, reported no difference.…”

“…It can be said that the mass/ power ratio decreased primarily by constructive limits of weight in high-power tractors. Similar results were reported by SCHLOSSER et al (2005), which state Ciência Rural, v.46, n.8, ago, 2016.…”

“…By analyzing the tables 1 and 2, it is observed that the average weight variable values vary depending on brand and type of traction, which agrees with the data obtained by SCHLOSSER et al (2005). As it can be seen, Yanmar brand has the smallest mass, 4.42 times less when compared to average of John Deere, Valtra, New Holland and Case IH tractors.…”

“…Over the years, tractors are becoming lighter, as well as the mass/ power ratio has been reduced, and this reduction is greater for higher power tractors (LAPERUTA FILHO et al, 1989;MÁRQUEZ, 1990;RENIUS, 1994;SCHLOSSER et al, 2005).…”

Acelerações eficazes na interface assento-operador de um trator

“…Quando há exigência de grandes esforços pelo trator, é necessária a adição de lastro, que é a massa que se acrescenta ou retira dos rodados e do suporte frontal do trator, a fi m de promover maior estabilidade e rendimento operacional (SCHLOSSER et al, 2005). Essa adição de massa ao trator pode provocar efeitos no que tange à vibração e refl ete-se na ergonomia do operador.…”