2nd ICAI 2022

International Conference on Automotive Industry 2022

Mladá Boleslav, Czech Republic

Figure 11: Comparison of simulated theoretical and measured contact pattern

Source: Škoda Auto, a.s., internal materials After checking the whole model and the properties of the individual parts, it was found, that there must be other factors in the chain affecting the contact pattern that influence the behaviour (slope) of the gearing. The element that was not considered in the model was the sliding sleeve and its engagement with the synchronisation gearing of the change gear. This observation led to the verification of the influence of the sleeve and its force action on the change gear. 3.3 Effect of radial clearance of the sliding sleeve The sliding sleeve, when interlocked into the change gear, is the member that transmits the torque from the shaft through the synchromesh body to the change gear mounted on needle bearing. (Figure 12). Due to radial run-out, distortion, clearance, and manufacturing defects of the individual members in the design chain (shaft, core, sleeve, synchronous gearing), the slope of the change gear on the needle bearing is likely to be affected.

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