| 摘要 |
PURPOSE: A grader for a tractor is provided to execute ground-leveling works and snow-removal works effectively. CONSTITUTION: The grader for a tractor comprises: a main frame(10) composed of a horizontal frame(16) provided with a projection(15) to connect a tractor connector(14) to right and left ends, a pair of side frames(12) and a center frame(11) extended backward; a buffer connector(20) connected to a main connection frame(13) and the backside of a tractor; a blade buffer(60) composed of an insert(62) connected downward from an end of the center frame(11), a compressive spring(61) coiled around the fitting bar, and a fitting rod(63) where the insert(62) is fitted; a blade(30) provided with a hinge shaft connected with the blade buffer(60) by a ball joint(50); and a hydraulic unit(40) provided with a vertical shift(70) whose one end is connected by a hinge support shaft(44) and the other end is provided with a vertical member(71).
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