Connecting rod

Abstract

The invention discloses a connecting rod, which comprising a connecting rod body, and at least two connecting holes formed on the connecting rod body. The inner walls of the connecting holes are provided with a wear reduction layer formed by a wear reduction material. The two connecting holes are a small end hole and a large end hole respectively. The connecting rod body consists of a connecting rod shank, a connecting rod bearing cover and a bolt. The small end hole is molded at one end of the connecting rod body, and the other end and the connecting rod bearing cover are connected and assembled to form the large end hole through the bolt. According to the invention, the inner walls of the large end hole and small end hole are provided with a layer of inner film layer to replace bearing bush, and the connecting rod has the advantages of light structure, high intensity and rigidity, few parts, simple manufacturing and assembly, energy saving and environmental protection, etc.

Description

technical field [0001] The invention relates to the field of engines, in particular to a connecting rod on the engine. Background technique [0002] With the development of science and technology and the advancement of engine manufacturing technology, the requirements for the power performance and reliability of automobile engines are getting higher and higher. The connecting rod is one of the key components of the reciprocating piston engine. The strength, stiffness and safety reliability of the connecting rod It is directly related to the life and reliability of the whole engine. Therefore, the connecting rod must have sufficient strength, rigidity, impact resistance and certain toughness, and at the same time be as compact in structure, light in weight and good in workmanship as possible. For this reason, major automobile companies at home and abroad attach great importance to connecting rod materials, structural design, and manufacturing technology. At present, high str...

AI Technical Summary

Problems solved by technology

[0007] Due to the existence of the connecting rod bearing bush in the traditional connecting rod, the size of the connecting rod shaft and the connecting rod cover hole is large, which weakens the rigidity and strength of the connecting rod, and makes the structural size of the connecting rod large; Existence, thus weakening the rigidity and strength of the small end of the connecting rod, and making the small head hole of the connecting rod larger; these all lead to the complex structure and large size of the entire connecting rod assembly, high manufacturing and processing costs; the large structural size of the connecting rod, The reciprocating mass of the engine is large, resulting in large engine friction loss, large vibration and high noise; the large head hole and small head hole of the connecting rod lead to poor overall stiffness and strength of the connecting rod. If the design is insufficient, it will cause the connecting rod to burn and pull. When the engine is running, the connecting rod is broken, resulting in the crash of the machine; there is a large gap at the junction of the upper and lower half bearings of the connecting rod, which will easily cause the oil pressure of the upper and lower half bearing bearings of the connecting rod to not be established, local wear, and serious burning of the bearings; Due to the existence of the upper and lower half bearing bushes, to fasten the bearing bushes in the big end hole of the connecting rod, a large bearing bush interference fastening force is required, so a large bolt fastening force is required, resulting in a large size of the connecting rod fastening bolts ;Due to the large size of the big head hole of the connecting rod, the center distance of the connecting bolts of the connecting rod is relatively large, and the connecting rod body and the tile cover may cause contact loss on the joint surface due to insufficient bolt pre-tightening force; moreover, the number of parts is large, Complex manufacturing, processing and assembly, high cost, etc.

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