Universal joints are common wherever a driveshaft needs to turn a corner; a driveshaft with a universal joint can freely rotate through the universal joint, and no gears are required to couple the two ends. The most obvious example of this application of a universal joint is in the driveshafts of automobiles, a technology known as the Hotchkiss drive. Cardan driveshaft with universal joints A driveshaft or driving shaft or Cardan shaft is a mechanical device for transferring power from the engine or motor to the point where useful work is applied. ... Karl Benzs Velo model (1894) - entered into the first automobile race An automobile is a wheeled passenger vehicle that carries its own motor. ... The dominant form of power transmission for front-engine, rear-drive cars in the twentieth century is called the Hotchkiss drive. ...
However, when the two shafts are at an angle other than 180°, the driven shaft does not rotate with the same speed as the drive shaft; the more the angle goes toward 90° the jerkier the movement gets (clearly, when the angle β = 90° the shafts would even lock).
The angular speed ω2 of the driven shaft, as a function of the angular speed of the driving shaft ω1 and the angle of the driving shaft φ1, is found using: Angular frequency is a measure of how fast an object is rotating In physics (specifically mechanics and electrical engineering), angular frequency ω (also called angular speed) is a scalar measure of rotation rate. ...
and the angular acceleration, Angular acceleration is the rate of change of angular velocity over time. ...
Angular speed ω2 of driven shaft for different angles β
Download high resolution version (970x604, 46 KB)Universal joint, driven shaft angular speed ω2, graph of the function ω2 = ω1 · COS β/(1-SIN2 β · SIN2 φ1) for ω1 = 1, angle between shafts β = 15°, 30°, 45° and 60° and for one revolution (φ1 = 0. ... Download high resolution version (970x604, 46 KB)Universal joint, driven shaft angular speed ω2, graph of the function ω2 = ω1 · COS β/(1-SIN2 β · SIN2 φ1) for ω1 = 1, angle between shafts β = 15°, 30°, 45° and 60° and for one revolution (φ1 = 0. ...
Universal joints in a driveshaftTo prevent the jerky rotation of the axle or driven shaft there usually are two U-joints in a three part shaft assembly. The second U-joint will convert the jerky movement back to an even, uniform speed of the third shaft - if both the driving and the driven shaft are parallel.
Image File history File links Download high resolution version (1870x1555, 333 KB) Cardan_Shaft Picture made on my own File links The following pages link to this file: Universal joint Driveshaft ...
本文转自：China Industry News