Why Are Transmission Gears All Helical Gears?

1 Answers
MacAndres
07/29/25 1:06pm
There are several reasons why transmission gears are all helical gears: Reducing operational noise: Modern transmission gears are designed with helical teeth, which maintain a long meshing state between each other. This design helps reduce the noise generated during gear operation. Additionally, straight-cut gears are incorporated to minimize gear clash during shifting: Inside the helical gears, straight-cut gears are also designed. The shaft between two helical gears features splines with a synchronizer ring. On both sides of the synchronizer ring, there are ratchet teeth that can slide left and right along the splines. By sliding the synchronizer ring, the tapered gaps on the ratchet teeth align precisely with the tapered protrusions on the straight-cut gears inside the helical gears. Before meshing, several sets of conical metal friction plates on both sides ensure synchronization between the gears through friction, thereby reducing gear clash during shifting.
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