英语翻译Propeller Shaft and Universal JointThe propeller shaft i

英语翻译
Propeller Shaft and Universal Joint
The propeller shaft is a drive shaft to carry the power from the transmission to the rear-wheel axles.It connects the transmission main,or output,shaft to the differential at the rear axles.Rotary motion of the transmission main shaft carries through the propeller shaft to the differential,causing the rear wheels to rotate.
The propeller-shaft design must take two facts into consideration.First,the engine and teansmission are more or less rigidly attached to the car frame.Second,the rear-axle housing(with wheels and differential)is attached to the frame by springs,As the rear wheels encounter irregularities in the road,the springs compress or expand.This changes the angle of drive and the distance between the transmission and the differential,and the propeller shaft may take care of these two changes.That is to say,as the rear axle housing,with differential and wheels,moves up and down,the angle between the transmission output shaft changes.The reason the propeller shaft shortens as the angle increases is that the rear axle and differential move in a shorter arc than the propeller shaft.The centerpoint of the axle-housing arc is the rear-spring or control-arm attachment to the frame.In order that the propeller shaft may take care of these two changes,it must incorporate two separate types of device.These must be one or more universal joints to permit vatiations in the angle of drive.These nust also be a slip joint that permits the effective length of the propeller shaft to change.
The propeller shaft may be solid or hollow,protected by an outer tube or exposed.Sone applications include bearings at or near the propeller shaft center to support the shaft.The two-section propeller is supported by a center bearing and coupled together by universal joints.
A universal joint is essentially a double-hinged joint cinsisting of two Y-shaped yokes,one on the driving shaft and the other on the driven shaft,abd across-shaped member called the spider.The four arms of the spider,known as trunnions,are assembled into bearings in the ends od the two shaft yokes.The driving shaft causes the spider to rotate,and the other two trunnions of the spider cause the driven shaft to rotate.When the two shafts are at an angle to each other,the bearings in the yokes permit the yokes to swing around on the trunnions with each revolution.A variety of universal joins have been used on automobiles,but the types now in most common use are he spider and two-yoke,the cinstant-velocity,and the ball-and-trunnion joints.
A slip joint consists of outside splines on one shaft and matching internal splines on the mating hollow shaft,the splines cause the two shafts to rotate together but permit the two to move endwise with each other.This accommodates any effective change of length of the propeller shaft as the rear axles move toward or away from the car frame.

传动轴和万向节
螺旋桨轴是传动轴执行的权力,传输到后轮axles.It连接传输为主,或输出,竖井的差别在车尾axles.Rotary运动的主轴进行传输通过螺旋桨轴的差别,造成后轮旋转.
螺旋桨轴的设计必须考虑到两个事实consideration.First ,发动机和teansmission或多或少僵硬重视汽车frame.Second ,后方轴住房（与车轮和差别）附在帧的泉水,由于后轮遇到违规的路,弹簧压缩或expand.This变化的角度推动和传播之间的距离和差别,以及传动轴可能照顾这两个changes.That就是说,作为后轴住房,差异和轮毂,向上和向下之间的夹角传输输出轴changes.The原因传动轴缩短的角度增加是后轴和差别移动在更短弧比传动轴.该centerpoint的轴住房弧是后轮春季或控制臂附frame.In为了使传动轴可能照顾这两个变化,就必须把两个不同的类型必须是一个device.These或更多的万向节,允许vatiations的角度drive.These nust也将是一个联合,允许支路的有效长度传动轴改变.
螺旋桨轴可能是固体或空心,保护了外管或exposed.Sone应用包括轴承或接近传动轴中心,以支持shaft.The两节螺旋桨支持的中心轴承和耦合在一起的万向节.
一个普遍的共同本质上是一个双铰链的联合cinsisting两个Y型线圈,一个是关于驾驶轴和其他的传动轴,阿卜德跨越形会员称为spider.The四个武器的蜘蛛,被称为trunnions正在组装成轴承外径的两端的两个轴yokes.The主动轴原因蜘蛛旋转,另外两个trunnions蜘蛛导致传动轴以rotate.When两个轴角对方,轴承在线圈允许线圈左右摇摆不定的trunnions每个revolution.A各种普遍加入已被用于汽车,但现在的类型最常见的使用是他蜘蛛和两枷锁的cinstant速度,和球耳轴接头.
支路联合组成的一个外部样条轴和匹配的内部样条的交配空心轴,造成的样条的两个轴旋转在一起,但允许两个移动endwise每个other.This可有效改变任何长度的螺旋桨轴的前后轴走向或远离汽车内