一、方向盘为何“发抖”? 我县大房身乡有一台小四轮拖拉机,经自己拆装后,过一段时间,机体出现全身发抖。开车时,方向盘“哆嗦”得打手,握不住。开始驾驶员怀疑是方向盘自由行程过大造成的,但调试后,振动仍无减轻。后来,打开正时卤轮室罩盖,发现是平衡铁与平衡齿轮间的平键磨损,发生滚动,造成平衡铁偏离原位置,致使发动机曲柄产生的旋转惯性力无法平衡抵消而发生抖动。换上新的平键,发动机恢复了正常,方向盘也不打手了。 First, why the steering wheel “trembling ”? My county big room body has a small four-wheel tractor, after disassembly, after a period of time, the body trembles. When driving, the steering wheel “shiver ” got a thug, can not hold. At the beginning of the driver suspected to be caused by excessive steering wheel free travel, but after commissioning, the vibration is still no mitigation. Later, open the timing of the halogen chamber cover and found that balance between iron and balance gear flat key wear and rolling, resulting in balance iron deviation from the original position, resulting in the engine crank rotating inertial force can not balance the offset and jitter occurs. Put a new flat key, the engine returned to normal, the steering wheel is not a thugs.