Uni证I diameters in increments of 6 mm or less. 它是由热轧和冷拉延制造或用直径余量为6mm或更小的棒料机械加工面成。 3.Hollow shaftsalso allow internal support or permit other shafting to operate through the interior. 空心轴还允许内部支撑或让其他传动轴穿过其内部工作 4.The center of large shafts made from ingots are often bored out to remove 轮子和壳体之何主要的传动轴连接称为轮轴。 6.It may simnly be the extension of a mund member from each side of the rear of a wagon,and on the end of each the hub of a wagon wheel rotates 简单地说，它可以是从四轮马车后部两端伸出的圆形构件，四轮马车车轮的轮 较在其每个瑞部旋转。 Couplings.Clutches,Shafts and Springs Acoupling is a device for connecting the ends of adjacent shafts
for which th made in sections that are coupled together with rigid couplings. In connecting shafts bclonging to scparate devices such as an clectri motor and a gearbox).precise aligning of the shafts is difficult and a flexible coupling is used.This coupling connects the shafts in such a way as to minimiz the harmful effects of shaft misalignment.Flexible couplings also permit th in the A clutch is a device for quickly and easily connecting or disconnecting a rotatable shaft and a rotating coi shaft.Clutchesare usually placed between the input shaft to a machine and the output shaft from the driving motor.and provide a convenient means for starting and stopping the machine and permitting the driver motoror engine to be started in an unloadked state The rotor (rotating member)in an electric motor has rotational inertia and ator uired tobring it upt d w en the motor is started. th a la e rota city to bring the the wind :th motor and the load shafts will restrict the starting torque on the motor to that required to accelerate the rotor and parts of the clutch only. On some machinc tools it is convenient to let the driving motor run continuously and to start and stop the machine by operating a clutch.Othe machine tools reccive their power fro Ashaftis rotatingor stationary member,aly of having cels.cranks.and mission ekments Shafts may be subiccted to bending
Uni证I mpression,ofo: sinele sha and ro stresses.all acting at the same time.The word "shaft"covers num variations,such as axles and spindles.An axle is a shaft.either stationary or rotating.not subjected to a torsion load.Ashort rotating shaft is often called a spindle. Aspring is a lod-sensitive,energy-storing device the chief characteristics without failure and to ds are remove Although most spring erent in motiv in the tr iion of periodic disturbin forces from unbalanced rotating machines to the supporting structure.and providing shock protection for delicate instruments during shipment. (679w0rk) Words and Expressions pling kApin] cxcentionally ik'spfani] clutch [kt] ,离合器： d。整外地，特别地 a'pdal nant [ecm on] e [p ,在一足，接 双。半水久性的时的 性颗轴节刚性接 义上 鞋器
ending.tension. 与，拉，压缩或转 defket [di'a] .周移，弯由，下面 rne吵y[sg] @d。单独地，触白地，逐 ate ik灯 shock fatigue [fl n,夜乏，成劳： rku'de 双。同轴的，共轴 .新断，反向的，版的 means [micr] 千段，力法 axk [ n,轮轴，轴 driver mo 川，转子，电驱战动啡 ratioal inertia 转动量 derive [d'miv] inberent in 为所因有，员有的 winding ['waindin ·金的 burn out cushion ['afan] pulley ['pui 小，轮，皮轮 中 扰力 V.安装，固定 delicate ['delikit] 4,精密的，精巧的，感 Br[g shipment[pmt]n,发货，运货，装运（员 Notes
Uni证I 在rncy or 2.Elexible counlings also permit the shafts to deflect under their separate systems of loads and to move freely (float)in the axial direction without interfering with one another. 弹性联轴器也能适应轴上由于其系统所施加的负荷而产生的弯曲偏斜且适应 轴沿其轴线方向的自由移动水浮动)而不会对另一根轴的冲击授荷的强度和振 inerti and the sing a switch,the mo a 若电动机轴与大转动惯量的负拔轴俐性联接，且通过闭合开关突然启动电动 机，那么过电流会使电动机绕组烧坏，电动机不能有足够的转矩使电动机轴加 速到一定的速度。 4.A shaft is a rotating or stationary member.usually if circular cross section having mounted upon it such elcments as gcars,pulleys.flywhocls,cranks. and other power-transmission elements. 轴是可旋转或静止的零件，通常具有圆形横截面，其上固定安装有诸如齿轮、 带轮、飞轮、曲柄以及其他一些动力传递的专部件。 Exercises .A connecting the ends of adjacent shafts.In sare used to effect a that it is no meant to be b but it can b n and restored in or when worn parts are replaced