Camshaft bearing pedestal

Abstract

The invention discloses a camshaft bearing pedestal. The camshaft bearing pedestal is convenient to manufacture. The camshaft bearing pedestal comprises a bearing pedestal body located on the upper portion of a cylinder cover during assembling, two camshaft bearing holes are formed in the upper end of the bearing pedestal body, a positioning hole and a bolt hole used for connecting with a cylindercover are formed in the bearing pedestal body, lubricating oil grooves are formed in the walls of the camshaft bearing holes, a transverse bearing pedestal oil way is arranged at the position, located below the lubricating oil grooves, in the bearing pedestal body, two throttling holes which are downwards through are formed in the bearing pedestal oil way, lower port portions of the throttling holes correspond to a cylinder cover oil way on the cylinder cover, two oiling holes communicating with the two lubricating oil grooves are formed in the bearing pedestal oil way, and one end of the bearing pedestal oil way is through, and is provided with a plug; and after the bearing pedestal body is assembled with the cylinder cover, the top face of the bearing pedestal body and the top face of the cylinder cover are located on the same plane. Machining is easy, and manufacturing cost is low.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a camshaft bearing seat. Background technique [0002] Most of the existing overhead camshaft engine camshaft bearing housings are separated up and down, and are composed of an upper bearing cover and a lower bearing housing. That is to say, the lower bearing seat is generally integrated on the cylinder head, and the upper bearing cover is fastened to the lower bearing seat by bolts. For this kind of camshaft bearing housing structure integrated with the cylinder head, the design of the lubricating oil channel of the camshaft is relatively difficult due to the large volume of the integrated bearing housing and the cylinder head, and the cost of processing the lubricating oil channel is very high, and It also makes it difficult to cast the cylinder head. At the same time, this structure of the camshaft bearing seat will also affect the arrangement of the cylinder head bolts, som...

AI Technical Summary

Problems solved by technology

For this kind of camshaft bearing housing structure integrated with the cylinder head, the design of the lubricating oil channel of the camshaft is relatively difficult due to the large volume of the integrated bearing housing and the cylinder head, and the cost of processing the lubricating oil channel is very high, and It also makes it difficult to cast the cylinder head

At the same time, this structure of the camshaft bearing seat will also affect the arrangement of the cylinder head bolts, sometimes causing the bolt holes on the bearing seat (such as the bolt holes connecting the bearing cap) to overlap with the positions of the cylinder head bolts, and in order to prevent The overlap between the bolt holes on the bearing seat and the cylinder head bolts often requires increasing the length of the cylinder head, which will increase the overall weight and length of the engine, thereby limiting the application range of the engine

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