Engine shifting mechanism

Abstract

The invention discloses an engine shifting mechanism which comprises a main shaft (1), an auxiliary shaft (2) and a shifting fork shaft (3), wherein the auxiliary shaft (2) is provided with a reverse gear driven sprocket (6), a dial wheel (7) and a forward gear driven sprocket (8); first inverted cone dial claws (7a) are uniformly arranged at the periphery of the left side of the dial wheel (7) and correspond to first inverted cone dial grooves (6a) in shape which are uniformly arranged at the periphery of the right side of the reverse gear driven sprocket (6); second inverted cone dial claws (7b) are uniformly arranged at the periphery of the right side of the dial wheel (7) and correspond to second inverted cone dial grooves (8a) which are uniformly arranged at the periphery of the left side of the forward gear driven sprocket (8); one of working surfaces of the first dial claws (7a) and the second dial claws (7a) is sunk at one end close to the end surface so as to form a step (7c). In the engine shifting mechanism, the inverted cone dial claws and the inverted cone dial grooves are creatively adopted for cooperation in work, thereby limitedly avoiding the phenomena of off-gear and gear engaging slippage when the engine load is larger, and furthermore, gaps among the working surfaces of the pusher dogs and the dial grooves are appropriately designed, thereby avoiding the problem of the difficult forward gear and impact abnormal sound.

Description

technical field [0001] The invention relates to the field of motorcycle engines, in particular to a shifting mechanism used on the engine. Background technique [0002] Such as figure 1 The engine shifting mechanism shown is composed of a main shaft 1, a countershaft 2, a fork shaft 3, a reverse drive sprocket 4 arranged on the main shaft 1 and an advance drive gear 5, and a reverse gear slave arranged on the countershaft 2. Moving sprocket 6 ', thumb wheel 7 ', advancing gear driven gear 8 ' and output gear 9, the shift fork 10 that is arranged on the shift fork shaft 3, and chain 11 form. Reverse gear driving sprocket 4 and reverse gear driven sprocket 6' are transmitted through chain 11, and forward gear driving gear 5 and forward gear driven gear 8' are meshed for transmission, and dial 7' is located between reverse gear driven sprocket 6' and Between the gear driven gears 8', the shift fork 10 is inserted on the dial 7' and can drive the dial 7' to move axially. [0...

AI Technical Summary

Problems solved by technology

When the design of the gap between the claw and the working surface of the shifting groove is small, it will be difficult for the engine to shift forward and backward; , When the engine is running with high torque, there will be abnormal noises caused by the collision between the claw and the working surface of the slot.

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