What is the connecting rod composed of

Release time: 2022-12-27

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.
On a V-type engine, the left and right rows of corresponding cylinders share a crank pin. The connecting rods include parallel connecting rods, fork shaped connecting rods, and main and auxiliary connecting rods. The two ends of the mechanism are hinged with the driving member and the driven member respectively to transmit motion and force.
Connecting rod group is composed of connecting rod body, connecting rod big end cap, connecting rod small end bushing, connecting rod big end bearing bush, connecting rod bolt (or screw), etc. connecting rod
Automobile: connecting rod is an important part of automobile engine, connecting piston and crankshaft. Its function is to convert the reciprocating motion of the piston into the rotary motion of the crankshaft, and transfer the force acting on the piston to the crankshaft to output power. Connecting rod, connecting rod bolt, connecting rod bushing, connecting rod bushing, connecting rod cap and locating sleeve form a whole. It has two heads, a big head and a big head. The big head is installed on the crankshaft, and the small head is connected with the piston!

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