JAC 2.0 expansion broken link assembly

Classification: Flat Cut Connecting Rod

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The connecting rod body is composed of three parts. The part connected with the piston pin is called the small end of the connecting rod; The part connecting the crankshaft is called the big end of the connecting rod, and the part connecting the small end and the big end is called the connecting rod shaft.
Connecting rod heads are mostly thin-walled annular structures. In order to reduce the wear between the connecting rod head and the piston pin, the thin-walled bronze bushing is pressed into the small head hole. Drill holes or grind grooves on the small head and bushing so that the splashed oil drops can enter the mating surface of the lubricating bushing and piston pin.
The connecting rod is a long rod, which is stressed during operation. In order to prevent bending and deformation, the connecting rod must have sufficient stiffness. Because of this, most of the connecting rod shafts of automobile engines are made of I-shaped steel, which can minimize the mass with sufficient stiffness and strength. Some high-strength engines are made of H-shaped steel. Some engines use fuel injection from the small end of the connecting rod to cool the piston, so a through hole must be drilled longitudinally on the shaft. In order to avoid stress concentration, the connecting points of connecting rod shaft, small end and big end shall adopt large arc for smooth transition.
In order to reduce the vibration of the engine, the mass difference of each cylinder connecting rod must be limited to the minimum range. When the engine is assembled in the factory, it is generally measured in grams according to the mass of large and small connecting rods. The same set of connecting rods is used for the same engine.

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