Connecting rod bushing and connecting rod assembly

Abstract

The invention discloses connecting rod bushing. At least one sunk part is arranged in a non-bearing zone of a bushing hole, and the gap between the sunken part and a piston pin is greater than that between a bearing zone of the hushing hole and the piston pin. The connecting rod bushing, with a non-circular section bushing hole, has the advantages that oil pumping effect can be produced because the gap between the sunken part and the piston pin is greater than that between the bearing zone and the piston pin, more lubricating oil can enter a part between the connecting rod bushing and the piston pin, lubrication cooling between a connecting rod small end bushing and the piston pin can be effectively improved, and further faults, such as abnormal wear of the connecting rod bushing and locking between the connecting rod bushing and the piston rod, caused by insufficient lubrication of the connecting rod bushing can be avoided. The invention further discloses a connecting rod assembly comprising the connecting rod bushing.

Description

technical field [0001] The invention relates to the technical field of engine components, in particular to a connecting rod bushing and a connecting rod assembly. Background technique [0002] The connecting rod bushing is a thin-walled annular part pressed into the small end hole of the connecting rod with a certain amount of interference in order to improve the wear of the small end of the connecting rod. The cross-section of the existing connecting rod small head bushing hole is a perfect circular structure, and the diameters of all parts on the same cross-section are the same, which are equal-diameter circles. [0003] Due to the high specific pressure and low sliding speed of the small end bearing of the connecting rod, it is difficult to form an ideal liquid lubrication. At present, the connecting rod small end of the engine is mostly supplied with oil through splash, connecting rod small end oil collection hole and oil groove for lubricating and cooling the connectin...

AI Technical Summary

Problems solved by technology

[0004] Due to the small gap between the small end bushing of the connecting rod and the piston pin, with the continuous increase of the explosion pressure level of the whole machine, the lubrication and cooling of the small end bushing of the connecting rod and the piston pin cannot be satisfied by the above lubrication method alone.

Insufficient lubrication of the connecting rod bushing may easily lead to abnormal wear of the connecting rod bushing, locking of the connecting rod bushing and the piston pin, etc.

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