•图示带轮用平键与轴联接(图中只画出了轴与键,未画带轮)。已知轴径d=80mm,平键的尺寸为bxhxl=24x14x120mm,传递的力偶矩为m=3kNm,键的许用剪应力[τ]=80MPa,许用挤压应力[σj]=180MPa,试校核键的强度。解:剪切强度校核:平键的剪切强度足够。mdQ2MPabldm04.268012024103226blQAQ挤压强度校核:故平键的挤压强度也足够。lhAPjjjj2lhblQPjj2jjMPahb28.891404.262422