FIELD: agriculture.
SUBSTANCE: invention relates to agricultural machine building. Field grinder comprises grinding apparatus consisting of, installed in grinder housing with possibility of rotation, a grinding drum and a drive. Before grinding drum there is a receiving housing with preliminary pressing rolls. Two preliminary pressing rolls are installed with possibility of rotation. Other two preliminary pressing rolls are installed with possibility of rotation in swinging support levers. Each of swing support levers in point of articulation rests on connection link, which is connected to receiving housing or grinder housing to rest on it in stationary point of attachment. Moving preliminary pressing rolls can be pressed to fixed rolls by pre-stress device. Point of articulated joint of rocking support lever is located between supports of two preliminary pressing rolls.
EFFECT: field grinder provides smooth operation of preliminary pressing rolls.
8 cl, 11 dwg
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