Decompression mechanism for pedal start of motorcycle engine

Abstract

The invention provides a decompression mechanism for pedal start of a motorcycle engine. The decompression mechanism comprises a recoil shaft, an exhaust valve rocker arm and an exhaust valve, as well as a pressure plate, a rotatable operating arm and a rotating shaft provided with a reset torsion spring, wherein the pressure plate is fixedly arranged on top of a rod part of the exhaust valve andextends out of the side of the rod part of the exhaust valve; the operating arm is provided with a cam matched with the pressure plate; the periphery of the rotating shaft is fixedly provided with a connecting plate and a pressing block that are mutually parallel; the end of the connecting plate and the operating arm are connected through an inhaul cable; the periphery of the recoil shaft is provided with a lug; and the pressing block clings to the lower side of the lug under the elastic force of the reset torsion spring. With the decompression mechanism, the compression pressure in an air cylinder can be released while a user treads on a recoil starting lever. The decompression mechanism reduces the recoil in pedal start of the engine, and has the benefits of convenience and labor savingin pedal start of the engine.

Description

technical field [0001] The invention relates to a decompression mechanism for starting a motorcycle engine, in particular to a decompression mechanism for kick starting a motorcycle engine. Background technique [0002] During the start-up phase of a motorcycle engine, an external force is needed to provide the starting speed required for the normal operation of the engine. This external force is used to overcome the frictional resistance and the reaction force of the engine compression process. The size of the reaction force is determined by the compression ratio and displacement of the engine. Motorcycle engines are usually started by the motor to provide external force to drive the crankshaft to run. After the engine reaches a certain speed, it runs automatically, and the motor is separated from the crankshaft. When the motor cannot work normally, in order to ensure that the motorcycle can start normally, the motorcycle is usually equipped with There is a pedal recoil sta...

AI Technical Summary

Problems solved by technology

When the engine displacement is small, the recoil resistance of the engine is small, and the recoil starter lever can be easily stepped on with the foot to make the engine run. However, when the engine displacement reaches more than 200cc, it is very laborious to use the foot Small users may not be able to start the engine with their feet, that is, some users say that the function is idle, and users with low strength cannot use the function of pedal recoil start. When the electric starter is damaged, the function of pedal recoil start cannot be exerted.

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