Abstract
One of the modern trends in transmissions design is the increase in the number speed ratios. By means of generalized structures method, the gear transmission types (layshaft and planetary) were analyzed with a view to increasing the number of speed ratios. The analysis showed that the speed ratio increase in the layshaft and planetary transmissions lead to significant complication and an increase in the number of clutches. The two-stream transmissions allow obtaining greater number of speeds with fewer clutches. The two-stream transmissions synthesis method is proposed. Examples of 8 and 12-speed transmissions synthesis are presented.
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Abbreviations
- \( N \) :
-
Total number of speeds in the transmission
- I:
-
Input member
- O:
-
Output member
- GB:
-
Internal gearbox with own speeds
- \( N_{\text{GB}} \) :
-
Number of speeds in the internal gearbox GB
- \( i_{\text{GB}} \) :
-
Gear ratio of the internal gearbox GB
- m, n:
-
Differential members
- \( i_{\text{nO}}^{\text{m}} \) :
-
Differential gear ratio of member n to output member O, assuming member m is stopped
- \( i_{\text{mO}}^{\text{n}} \) :
-
Differential gear ratio of member m to output member O, assuming member n is stopped
- \( i_{\text{In}}^{\text{m}} \) :
-
Differential gear ratio of input member I to member n, assuming member m is stopped
- \( i_{\text{Im}}^{\text{n}} \) :
-
Differential gear ratio of input member I to member m, assuming member n is stopped
- \( l_{1} ,\;l_{2} \) :
-
Amount of modes when differential works together with GB1 and GB2 respectively
- \( l_{\text{D}} \) :
-
Amount of modes when differential works independently
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Kraynev, A., Salamandra, K., Raghavan, M. (2013). Synthesis of the Two-Stream Transmissions. In: Dobre, G. (eds) Power Transmissions. Mechanisms and Machine Science, vol 13. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6558-0_25
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DOI: https://doi.org/10.1007/978-94-007-6558-0_25
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