| 摘要 |
A structure of a rotorvator for performance is provided to form knife fixing holes to have a broad space and a narrow space between each other in turn on an outer circumferential surface of a flange to use selectively broad and narrow agricultural knives. A flange having an agricultural knife fixed thereon is installed on an agricultural shaft of a tractor. Twelve knife-fixing holes(30) are formed on the outer circumferential surface of the flange(10) to have a broad space(a) and a narrow space(b) or a narrow space(b) and a broad space(a) between each other in turn. Coupling holes(40) are formed on the agricultural knife(20) to have the same diameters and the same spaces between each other as the knife fixing holes(30). On the broad space(A) and the narrow space of the knife-fixing bole(30), agricultural knives(20) on which broad coupling hole or narrow coupling hole is formed are selectively fixed. |
