A motorcycle engine valve rocker mechanism

Abstract

The invention relates to a valve rocker mechanism of a motorcycle engine, comprising a valve rocker arm and a cam; a mandrel installed on the valve rocker arm, and a roller set rotatably on the mandrel through a central hole. The outer circular surface of the roller is in contact with the cam, the outer circular surface of the roller is provided with an annular oil groove, the center hole of the roller is provided with an annular oil groove, and the bottom of the annular oil groove is provided with a communication and an annular oil groove. Radial oil holes for oil grooves. In the present invention, by setting the annular oil groove, annular oil groove and radial oil hole on the roller, the lubricating oil can enter the mating surface of the roller and the mandrel, effectively reducing the gap between the roller and the mandrel. friction, reduce the wear on the mating surface of the mandrel and the roller, and improve the service life of the entire valve rocker mechanism; and, by setting the annular oil groove, it is also beneficial to further reduce the friction between the roller and the cam.

Description

technical field [0001] The invention relates to motorcycle engines, in particular to a motorcycle engine valve rocker mechanism. Background technique [0002] At present, most of the contact surfaces between the rocker arm and the cam of the existing motorcycle engine are arc surfaces, and when working, the mutual motion between the arc surface of the rocker arm and the contact surface of the cam is sliding, and the friction form is sliding friction. The coefficient is large, so the surfaces of the rocker arm and the cam are easily worn, and the working power loss is large. In order to solve the above problems, some manufacturers install the mandrel on the rocker arm of the valve, and then set the roller on the mandrel, and change the mutual motion between the rocker arm and the cam into rolling through the contact between the roller and the cam. ; It solves the wear problem of the cam to a large extent, but because the friction between the roller and the mandrel connected ...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the contact surfaces between the rocker arm and the cam of the existing motorcycle engine are arc surfaces, and when working, the mutual motion between the arc surface of the rocker arm and the contact surface of the cam is sliding, and the friction form is sliding friction. The coefficient is large, so the surfaces of the rocker arm and the cam are easily worn, and the power loss of the work is large

In order to solve the above problems, some manufacturers install the mandrel on the rocker arm of the valve, and then set the roller on the mandrel, and change the mutual motion between the rocker arm and the cam into rolling through the contact between the roller and the cam. ; It solves the wear problem of the cam to a large extent, but because the friction between the roller and the mandrel connected to the roller is still sliding friction, the mating surface of the roller and the mandrel is still easy to be worn, and it will also be damaged after a long time of use. causing malfunction

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