建筑行业常常使用起升机送一些予制板、车辆砂石等建筑材料，在运行过程中会出现平台突然下落的工况，当使用抱闸瞬时将其刹住时，制动轮会因受力过大而碎裂以致碎块飞出伤人。这里仅从强度、刚度校校角度进行一些分析，供设备设计制造和使用单位参考。已知条件：（1）闸?.. The construction industry often uses lifting machines to send building materials such as slabs, vehicle sand, etc. In the course of operation, there will be a situation where the platform suddenly drops. When the brake is momentarily used to stop it, the brake wheel will suffer. The force is so large that it breaks up and causes the pieces to fly out of wounds. Here only from the perspective of strength, stiffness, school and school analysis for equipment design and manufacturing and use of reference. Known conditions: (1) brakes..