| 摘要 |
The present invention relates to a safety device of a harrow for a tractor. The purpose of the present invention is to provide the safety device of the harrow for the tractor preventing damage to a locking bar by absorbing an initial outer force applied to the locking bar when an outer harrow plate rotates in a direction opposite to a direction where the outer force is generated by obstacles such as stones or a clod. To achieve the purpose, the present invention, the safety device of the harrow for the tractor installed on the rear side of the tractor and the outer harrow plate, is connected to both sides of a central harrow plate includes a harrow fixating unit mounted between the central harrow plate and the outer harrow plate and enabling the outer harrow plate to rotate in the front and rear sides of the central harrow plate; the locking bar installed to enable the body to rotate in the rear side of the outer harrow plate and of which rotation to the front side is limited and the lower part is projected toward the outer side of the underside of the outer harrow plate or central harrow plate; and an elastic locking unit installed on the central harrow plate and locking the lower part of the rear side of the locking bar to elastically supporting the movement of the outer harrow plate to the rear side while limiting the movement. The elastic locking unit is characterized by being fixated to the central harrow plate and being compose of a housing with an insertion hole on the front side; a bolt inserted inside the housing via the insertion hole of the housing and of which a head unit exposed to the outside is toward the locking bar; and a spring installed inside the housing and elastically supporting the bolt. |
