Why is it difficult to shift into first and second gears?

1 Answers
Iker
07/30/25 2:47am
It is generally due to the absence of synchronizers in first and second gears. Below is an introduction to synchronizers: 1. Classification and structure: Synchronizers come in various forms such as constant-pressure type, inertial type, and self-energizing type. Currently, the inertial type synchronizer is widely used. It mainly consists of a coupling sleeve and a synchronizer locking ring, and its characteristic is achieving synchronization through friction. 2. Constant-pressure type synchronizer: A splined hub 1 is installed between the first shaft gear 2 and the gear 4, which is loosely fitted on the second shaft 5. The splined hub is slidingly connected to the second shaft and the coupling sleeve 3 through its internal and external splines. By moving the coupling sleeve to the left or right, its internal spline gear ring can engage with the coupling gear ring of gear 2 or gear 4, thereby engaging the direct drive or second gear.
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