机械设计课程设计零件图改错题及答案.ppt

Chapter 15 Chapter 15 shaftsshafts2021/9/231§15.1 Types and materials of shafts2021/9/232Axle Axle M MBy loadClassification of shaftsSpindle Spindle T TShaft Shaft M+T M+TBy shaft axesCrank shaftCrank shaftFlexible shaftFlexible shaftStraight shaftStraight shaftStepped shaftNo-stepped shaft2021/9/233Turn axle Fixed axleClassification of shafts2021/9/234Classification of shaftsSpindle2021/9/235 ShaftClassification of shafts2021/9/236Stepped shaftCrank shaftNo-stepped shaftHollow shaftStraight shaftsFlexible shaftsClassification 2021/9/237What types of shafts ?Classification of shafts2021/9/238Materials of shaftsMedium-carbon steels or alloy steels Normalizing, quenching and tempering 2021/9/239§15.2 The procedure of shaft design2021/9/23101. Determine the minimum diameter of the shaft by means of torque2. Design the shaft structure3. Strength calculation2021/9/2311§15.3 Considerations for shaft geometry2021/9/2312Lock ring at shaft end Flexible retaining rings/circlip for shaftLocation of elements on shaft2021/9/2313Round nut and lugged washer Jam nutsLocation of elements on shaft2021/9/2314Setscrew Shaft shoulder and sleeveLocation of elements on shaftShaft shoulderSleeve2021/9/2315Shaft shoulder shaft ring h≈(0.07 h≈(0.07～～0.1)d0.1)dOr hOr h≥ 3～～5mm b=1.4h 5mm b=1.4h Location of elements on shaftr