Rocker arm shaft and rocker arm assembly

Abstract

The invention discloses a rocker arm shaft and a rocker arm assembly. The rocker arm shaft comprises a rocker arm shaft body capable of extending into a shaft hole of a rocker arm, a main oil duct and at least one group of branch oil ducts are arranged in the rocker arm shaft body, and the main oil duct extends in the axial direction of the rocker arm shaft body. Each group of branch oil ducts comprises a rocker arm shaft head oil duct and a rocker arm shaft tail oil duct which have a preset included angle; one end of the rocker arm shaft head oil duct communicates with the main oil duct, and the other end of the rocker arm shaft head oil duct extends to the outer surface of the rocker arm shaft body so as to supply lubricating oil to the rocker arm shaft head oil duct; and one end of the rocker arm shaft tail oil duct communicates with the main oil duct, and the other end of the rocker arm shaft tail oil duct extends to the outer surface of the rocker arm shaft body to supply lubricating oil to the rocker arm shaft tail oil duct. The rocker arm shaft can be well lubricated, and the structure of the rocker arm assembly is simplified.

Description

technical field [0001] The present application relates to the technical field of valve trains for internal combustion engines, and more specifically, relates to a rocker shaft and a rocker assembly. Background technique [0002] The working principle of the gas distribution mechanism of an internal combustion engine is: during the rotation of the intake and exhaust cams of the camshaft, the protruding part of the camshaft pushes the push rod to do periodic linear reciprocating motion, and transmits the force and displacement to the valve pressure plate through the rocker arm, and Further push the intake valve and exhaust valve to open, and the valve resets and closes under the action of the valve spring. [0003] The rocker arm assembly usually includes a rocker arm, a rocker shaft, a rocker bushing, and an adjusting screw. The wear of the rocker arm mainly includes the following four points: the relative motion between the head of the rocker arm and the valve pressure plat...

AI Technical Summary

Problems solved by technology

[0004] In order to ensure good wear resistance, the existing rocker arm assembly usually has a complex structure, and additional wear-resistant parts are provided in the friction area, for example, a wear-resistant block is embedded in the head of the rocker arm, and the shaft hole and the Install the rocker bushing between the arm shafts

The complex structure leads to the disadvantages of large number of parts, high cost of parts, complicated assembly process, and reduced product reliability.

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