Shafts and Associated Parts 轴和轴系零件 Introduction to Engineering
1 Introduction to Engineering Shafts and Associated Parts 轴和轴系零件
Shaft >A relatively long component >Usually with round cross section >Usually rotates and transmits power >Used to put one or more components such as gears, pulleys(皮带轮)，and cams) together by means of pins,keys etc. Introduction to Engineering
2 Introduction to Engineering Shaft A relatively long component Usually with round cross section Usually rotates and transmits power Used to put one or more components ( such as gears, pulleys（皮带轮）, and cams) together by means of pins, keys, etc
>A shaft can also have a non-round cross section, and it need not rotate >An axle(心轴)isa shaft,either stationary or rotating,not subjected to torsion load >A short rotating shaft is often called a spindle 轴) Introduction to Engineering
3 Introduction to Engineering A shaft can also have a non-round cross section, and it need not rotate An axle （心轴）is a shaft, either stationary or rotating, not subjected to torsion load A short rotating shaft is often called a spindle（主 轴）
Elements Attached to a Shaft Frame Frame Sheave Bearing Shaft Gear Pulley Shoulders(轴肩)provide axial positioning location Introduction to Engineering
4 Introduction to Engineering Elements Attached to a Shaft Shoulders（轴肩） provide axial positioning location
Mounting Parts onto Rotating Shafts >Parts are made separately and then mounted onto the shaft >The portion of the mounted i member in contact with the shaft is the hub(毂盘) >The hub is attached to the shaft in a variety of ways Introduction to Engineering
5 Introduction to Engineering Mounting Parts onto Rotating Shafts Parts are made separately and then mounted onto the shaft The portion of the mounted member in contact with the shaft is the hub（毂盘） The hub is attached to the shaft in a variety of ways
Keys(键)&Keyways(键槽) ©DIFFLOCK.com Keys are the most common of torque- transmitting shaft-to-hub connections The grooves in the shaft and hub into which the key fits are called keyways or keyseats 6 Introduction to Engineering
6 Introduction to Engineering Keys（键） & Keyways（键槽） Keys are the most common of torquetransmitting shaft-to-hub connections The grooves in the shaft and hub into which the key fits are called keyways or keyseats
Pin(销) A simple attachment for transmitting relatively light loads is provided by pins Pins provide a relatively inexpensive means of transmitting both axial and circumferential loads Straight Tapered split tubular spring 圆柱销 圆锥销 开口管状弹簧 (a) (c) Introduction to Engineering
7 Introduction to Engineering Pin （销） A simple attachment for transmitting relatively light loads is provided by pins Pins provide a relatively inexpensive means of transmitting both axial and circumferential loads Straight Tapered split tubular spring 圆柱销 圆锥销 开口管状弹簧
Setscrew (紧钉螺钉 >To prevent relative motion of components and shafts >Two screws are commonly used,spaced 90°apart >Inexpensive and sometimes adequate for relatively light loads >Sometimes used in Rotating Shaft and Pulleys with Projecting Key and Set Screw conjunction with keys Introduction to Engineering
8 Introduction to Engineering Setscrew（紧钉螺钉） To prevent relative motion of components and shafts Two screws are commonly used, spaced 90°apart Inexpensive and sometimes adequate for relatively light loads Sometimes used in conjunction with keys Rotating Shaft and Pulleys with Projecting Key and Set Screw
Retaining rings(卡圈) >Retaining rings commonly called snap rings >Axially positioning and retaining hubs and bearings onto shafts >Requiring grooves on the shaft that weaken the shaft >Should be located where stresses are low Introduction to Engineering
9 Introduction to Engineering Retaining rings（卡圈） Retaining rings commonly called snap rings Axially positioning and retaining hubs and bearings onto shafts Requiring grooves on the shaft that weaken the shaft Should be located where stresses are low
Front Working Angle Rear Working Angle Couplings(联轴器) 10 Introduction to Engineering
10 Introduction to Engineering Couplings（联轴器）