宇雕手扳葫芦省力原理
手扳葫芦是通过人力扳动手柄借助杠杆原理获得与负载相匹配的直线牵引力，轮换地作用于机芯内负载的一个钳体，带动负载运行。手扳葫芦一种轻小型理想的手动起重工具，自重轻，工作级别高，安全性能好，工作噪音低，制动力矩大等特点。河北宇雕详细讲解;手扳葫芦的省力原理，用动滑轮拉物体，绳子的两边受力是相等的，且均为所牵引物理重力的一半，而人只需要拉其中的一边，故人只需承受物体一半的重力，而另一半的重力则由绳的另一端所固定的物体所承受。其实也就是力矩平衡的一个方法，增大力矩就可以减少力，也就是经常所说的杠杆原理。
宇雕手扳葫芦特点：
1独特的弹性离合器技术，可在任意高度吊起货物
2轻盈的手拉装置、起升率高
3新型设计的锻打式吊钩，吊钩顶端更为安全，且具有缓慢弯曲性能
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