Engine and flywheel assembly thereof

Abstract

The invention discloses a flywheel assembly of an engine. The flywheel assembly comprises a flywheel and a gear ring which are matched with each other, and further comprises multiple connectors which are arranged on the flywheel; one end of each connector is connected with the flywheel; and the other end of each connector is fixedly connected with the end wall or the inner side wall of the gear ring. According to the flywheel assembly disclosed by the invention, the flywheel and the gear ring which are two components matched with each other are integrated into a whole due to the existence of the connectors, so that the fit interference degree of the flywheel and the gear ring is properly lowered on the basis that the flywheel and the gear ring are matched with each other normally for torque transmission, namely the interference magnitude is reduced; and the assembly stress of the gear ring is lowered, so that larger expansion space can be provided when the flywheel is heated and expands; the probability of plastic deformation of the gear ring is greatly lowered; and the stress of the gear ring is in a material allowable stress range all the time, so that the reliability of the flywheel assembly is ensured. The invention further discloses the engine comprising the flywheel assembly, and the engine has the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of vehicle engineering, in particular to a flywheel assembly of an engine. The invention also relates to an engine comprising the above-mentioned flywheel assembly. Background technique [0002] With the development of China's machinery industry, more and more machinery and equipment have been widely used. [0003] Take the automobile industry as an example. In the traditional automobile field, flywheels and ring gears are essential components. The flywheel of a manual transmission car is used as a friction disc of the clutch. It is generally made of cast iron. A ring gear is installed on the cast iron flywheel. The assembly of the ring gear and the flywheel is called a flywheel assembly. Among them, the ring gear is a thin-walled circular ring part, which is used as a part that bears torque when starting the engine, and transmits the power of the starter to the flywheel and the crankshaft through interfer...

AI Technical Summary

Problems solved by technology

However, since the ring gear and the flywheel are assembled through an interference fit, the thermal expansion of the flywheel will force the flywheel ring gear to expand accordingly. The ring gear itself has already expanded to a certain extent due to the interference fit. At this time, it is affected by the thermal expansion of the flywheel, which is easy Make the ring gear plastically deform or even break

Once the ring gear is plastically deformed, the interference between it and the flywheel will be insufficient, and the starting torque cannot be transmitted smoothly.

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