Cylinder head assembly of overhead camshaft and engine

Abstract

The invention discloses a cylinder head assembly of an overhead camshaft and an engine. The cylinder head assembly comprises a cylinder head, the camshaft, a rocker arm and a lubricating oil channel used for lubricating the camshaft and the rocker arm, wherein the lubricating oil channel comprises an oil inlet channel arranged on the cylinder head and a main oil channel used for receiving lubricating oil of the oil inlet channel, and a branch oil channel used for guiding the lubricating oil to the camshaft and the portion, needing to be lubricated, of the rocker arm is communicated with the main oil channel, so that on the premise that the strength of the camshaft is guaranteed, the camshaft can be designed more simply, and the structure is more compact, and the engine manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the field of power accessories, in particular to a cylinder head assembly of an overhead camshaft and an engine. Background technique [0002] An engine is a machine that can convert other forms of energy into mechanical energy. The internal combustion engine is a reciprocating piston engine. The biggest difference between this type of engine and an external combustion engine is that its fuel burns inside it, and the cam of a general engine There are three types of shaft installation positions: bottom, middle, and top; the top camshaft is to place the camshaft in the cylinder head and above the combustion chamber to directly drive the rocker arm and the valve without using a long push rod. Compared with the pushrod engine with the same number of valves (that is, the overhead valve structure), the overhead camshaft structure requires much less reciprocating parts, so the valve structure is greatly simplified and the engine weigh...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, such as figure 1 As shown, the overhead camshaft engine is composed of lubricating oil passages located in the cylinder head, mainly processing oil passages 2 and 3 on the cylinder head 1, and processing oil passages 7, 8 and 8 on the camshaft 4. The main oil passage 9, the oil enters the oil passage 2 from the cylinder block, passes through the oil passage 3 and reaches the main oil passage 9 of the camshaft 4, the oil entering the main oil passage 9 enters the oil passage 7 and the oil passage 8 respectively, and enters the oil passage 7 The engine oil lubricating the cam journal, the oil entering the oil passage 8 lubricating the cam and the rocker arm bearing 6 and other related friction pairs; this technology needs to process the oil passage 7, oil passage 8 and main oil passage 9 on the camshaft 4, so that the camshaft The structure is more complicated, and the structural strength of the camshaft is reduced, which affects the service life of the engine. In order to improve such problems, if the wall thickness and strength of the camshaft are to be increased, a larger external space is required, which is not conducive to the internal components of the engine. compact arrangement of

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