推荐回答（1个）
汽车钢板弹簧是汽车悬架中应用最广泛的一种弹性元件，它是由若干片等宽但不等长的合金弹**组合而成的一根近似等强度的弹性梁。
由于与车架连接处的钢板弹簧使用久了容易磨损，因此汽车钢板弹簧的润滑是十分重要的。大家知道钢板弹簧是由许多具有弹性、宽厚一致，而且长短不一的钢片所组成的。其作用是把车架与车桥用悬挂的形式连接在一起，裸露在车架与车桥之间，承受车轮对车架的载荷冲击，消减车身的剧烈振动，保持车辆行驶的平稳性和对不同路况的适应性。
汽车钢板弹簧在承受载荷冲击时形成伸展运动，钢片与钢片之间产生强烈摩擦，也就是产生挤压拉伸现象，两个摩擦表面又产生两个不同方向的运动摩擦力，造成钢板弹簧温度升度，出现表面拉伤，呈现出细小的烈纹，在载荷冲击频率增大的同时，伸展运动所产生的摩擦运动力也在增大，在应力集中点达到疲劳极限就会造成单片或整垛断裂。
汽车钢板弹簧断裂除了其它原因之外，主要的原因就是润滑不良而造成的，应该引起驾驶员和技术管理人员的重视，及时做好钢板弹簧的润滑工作。
一般的润滑方法是：新车磨合期结束就应该进行，夏冬两季在用车时进行。润滑作业时首先把钢板弹簧拆下来，打开中间穿心螺栓，使钢片散开，然后在钢片两面均匀地涂抹锂基润滑脂或石墨润滑脂，装复后两个摩擦表面之间形成油膜。
汽车钢板弹簧的润滑具有三点好处：一是减少摩擦分散应力，防止钢片表面拉伤；二是减少灰尘、泥土及水的侵入，防止锈蚀；三是散热降温，防止弹性强度下降。
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