The spline sleeve has sufficient mating length with the shaft; And at the minimum in length does not top to death. The size of the angle of the transmission shaft directly affects the life of the universal joint cross shaft and needle roller bearing, the efficiency of the universal transmission and the unevenness of the rotation of the cross shaft.
In order to achieve the change of transmission length. In order to reduce the axial sliding resistance and wear of the sliding spline, the transmission shaft assembly is mainly composed of the transmission shaft and the splined shaft and the universal joint fork welded at both ends. The transmission shaft is generally provided with a sliding spline composed of a sliding fork and a splined shaft. Sometimes the spline teeth are phosphated or sprayed with a nylon layer; Some are placed in the spline groove to put needle rollers, rollers or balls and other rolling elements, with rolling friction instead of sliding friction, improve transmission efficiency. However, this structure is more complex and the interest rate is higher. Sometimes for transmissions with severe shock loads, an elastic transmission shaft is also used. The spline on the transmission shaft should have lubrication and dustproof measures, and the gap between the spline teeth and the keyway should not be too large, and should be assembled according to the corresponding signs, so as not to destroy the dynamic balance of the transmission shaft assembly by wrong installation
