Special-shaped swing arm

Abstract

The invention relates to a special-shaped swing arm comprising a swing arm body (4) and a rolling bearing which are combined. The rolling bearing comprises a roller (2) and a rolling shaft (3), the roller (2) is of a fork structure which is correspondingly arranged on two sides of the swing arm body (4), the rolling shaft (3) is arranged in the roller (2), and two ends of the rolling shaft are riveted together with the swing arm body. The special-shaped swing arm is made of aluminum alloy, and the section of the special-shaped swing arm is T-shaped. The special-shaped swing arm is novel in structural design, and the swing arm body is cast with aluminum alloy materials. Compared with a traditional swing arm made of steel, the special-shaped swing arm has the advantages that the weight of the swing arm can be greatly reduced, so that the inertia force of a valve mechanism is reduced. The abrasion resistance of the swing arm is improved by the aid of a combined structure, the special-shaped swing arm body and the rolling bearing are combined to form the swing arm, and frictional abrasion of the valve mechanism can be reduced as the swing arm and a valve cam are designed in a matched manner.

Description

technical field [0001] The invention belongs to a rocker arm of an engine, and in particular relates to a special-shaped rocker arm meeting the requirements of highly enhanced diesel engine power performance and low friction. Background technique [0002] The function of the rocker arm of the engine is to transmit the movement of the tappet to the valve through the cam. At present, the structural types of the rocker arms of construction machinery vehicles and marine diesel engines at home and abroad are generally integral single rocker straight levers or double rocker fork levers, and the friction form between the integral rocker arm and the camshaft is pure sliding. , the existing domestic rocker arm design is mostly made of cast steel, forged steel or ductile iron, which is not only heavy, but also has low wear resistance. In order to improve wear resistance, the head of the rocker arm often needs local high-frequency quenching treatment or Insert, this rocker arm has th...

AI Technical Summary

Problems solved by technology

At present, the structural types of the rocker arms of construction machinery vehicles and marine diesel engines at home and abroad are generally integral single rocker straight levers or double rocker fork levers, and the friction form between the integral rocker arm and the camshaft is pure sliding. , the existing domestic rocker arm design is mostly made of cast steel, forged steel or ductile iron, which is not only heavy, but also has low wear resistance. In order to improve wear resistance, the head of the rocker arm often needs local high-frequency quenching treatment or Insert, this rocker arm has the characteristics of simple structure and easy manufacture, but it can only be applied to a specific type of valve train. This type of rocker arm cannot be used for high-speed, high-strength single overhead camshaft driven gas valves. mechanism

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