千斤顶设计计算说明书

工业大学机械设计作业设计计算说明书题目：设计螺旋起重器（千斤顶）系别：班号：：日期：2024.10.12 工业大学机械设计作业任务书题 目：设计螺旋起重器设计原始数据：起重量：FQ=30KN最大起重高度：H=180mm 目 录1.选择螺杆、螺母的材料·······································32.耐磨性计算··················································33.螺杆强度校核················································44.螺母螺纹牙的强度校核······································45.自锁条件校核················································56.螺杆的稳定性校核···········································57.螺母外径与凸缘设计·········································68.手柄设计····················································69.底座设计····················································710.其他零件设计··············································811.绘制螺旋起重器（千斤顶）装配图·························812.参考文献···················································81.选择螺杆、螺母的材料考虑到螺杆承受重载，需要有足够的强度，因此选用 45 钢，需要调质处理。由参考文献[3]表 10.2 查得 45 钢的抗拉强度σb=600MPa，屈服强度 σs=355MPa。螺母是在重载低速的工况下使用的，并且要求与螺杆材料配合时的摩擦系数小、耐磨，因此，螺母的材料选择铸造铝青铜 ZCuAl10Fe3。2.耐磨性计算螺杆选用 45 钢，螺母选用铸造铝青铜 ZCuAl10Fe3，由参考文献[1]表 5.8 查得，钢对青铜的许用压强[p]=18~25MPa，由表 5.8 注释查得，人力驱动时，[p]值可提高约 20%，即[p]=21.6~30MPa,取[p]=25MPa。由参考文献[1]表 5.8...