Equidistant molded surface transmission shaft

Abstract

The invention discloses an equidistant molded surface transmission shaft which is composed of two parts. The cross universal joint of an original transmission shaft is replaced with equidistant spherical couplings ((1), (3) in figure 4). Spline connection in the original transmission shaft is replaced by equidistant arc surface connection ((2) in figure 4). The axial cross section of the equidistant spherical coupling is an equidistant spherical surface ((1) in figure 4). The radial cross section of the equidistant spherical coupling is an equidistant arc surface ((1)a-a in figure 4). During working, the torque is transmitted by using the equidistant arc surface, the axial corner deviation is adjusted by using the equidistant spherical surface, and equidistant arc surface holes are milledand ground the by using an equidistant arc surface hole machine tool.

Description

technical field [0001] The invention relates to a transmission shaft, in particular to a new type of transmission shaft-a transmission shaft with equidistant profiles. Background technique [0002] The transmission shaft is a device used to transmit power torque in various automobiles, tractors, loaders, locomotives, metallurgical rolling mills, etc. The main structure is composed of "cross shaft universal joint" and "spline pair of intermediate shaft" ( figure 1 ). [0003] Existing problems: The "cross shaft" in the "cross shaft universal joint" is a cross-shaped forging (Figure 2). The blank part in the middle of the cross shaft is difficult to grind to a smooth and symmetrical shape, and the unbalanced amount will cause the transmission shaft to vibrate. "Spline shaft" with U-shaped forging ( image 3 ), the shape is complex, it is difficult to machine the surface to be smooth, the shape is asymmetrical, and there is a large amount of unbalance, which will cause the t...

AI Technical Summary

Problems solved by technology

[0003] Existing problems: The "cross shaft" in the "cross shaft universal joint" is a cross-shaped forging (Figure 2), and the blank part in the middle of the cross shaft is difficult to grind to a smooth and symmetrical position, and the unbalanced amount will cause the transmission shaft to vibrate

At the same time, there are tooth shape error, tooth thickness error, tooth pitch error and tooth pitch accumulation error in the spline, and the tooth surface engagement rate of the multi-tooth spline is low, so a small number of teeth bear all the torque, so that a small number of teeth will wear prematurely, and the tooth thickness will change. Thinness increases the fit clearance, and large fit clearance causes vibration, which will accelerate the wear speed of the spline, and in severe cases, the spline teeth will break

There is misalignment of the spline, which produces eccentric load and vibration at high speed, so the service life of the spline is low

Images