一、研制螺旋割刀的目的和意义目前收割机使用的往复割刀存在如下缺点:1、动刀的运动速度忽加忽减。曲柄转到与刀杆垂直位置时速度最高,转到左右两个死点时速度为零。这种加速减速的变化,每个往复就要出现两次。速度频繁地交变要耗费很大功率,它所产生的不平衡力又导致割刀剧烈地振动和噪音,限制 First, the purpose and significance of the development of spiral cutter Reciprocating cutter currently used by the harvester has the following disadvantages: 1, the speed of moving knife sudden increase and decrease. Crank to the vertical position with the arbor when the highest speed, turn left and right two dead when the speed is zero. This change in acceleration and deceleration occurs twice per reciprocation. Frequent alternating speed to spend a lot of power, it produces unbalanced force also leads to severe vibration and noise cutting knife, limit