The function of the automobile connecting rod assembly is to integrate multiple connecting rods together to better exert its stability, connect the piston and the crankshaft, and transmit the force on the piston to the crankshaft, converting the reciprocating motion of the piston into the crankshaft Rotational movement.
The connecting rod assembly is a combination of multiple connecting rods. In order to better exert its stability, it connects the piston and the crankshaft, and transmits the force on the piston to the crankshaft, converting the reciprocating motion of the piston into the rotational motion of the crankshaft. .
The connecting rod group is composed of connecting rod body, connecting rod big end cover, connecting rod small end bushing, connecting rod big end bearing bush and connecting rod bolts (or screws). The connecting rod group is subjected to the gas force from the piston pin, its own swing and the reciprocating inertial force of the piston group. The magnitude and direction of these forces change periodically.
Therefore, the connecting rod is subjected to alternating loads such as compression and tension. The connecting rod must have sufficient fatigue strength and structural rigidity. Insufficient fatigue strength will often cause the connecting rod body or connecting rod bolts to break, and then cause a major accident of complete machine damage.
Extended information: Structural composition The connecting rod body is composed of three parts. The part connected to the piston pin is called the small end of the connecting rod; the part connected to the crankshaft is called the large end of the connecting rod, and the rod connecting the small end and the large end is called the connecting rod shaft.
The small end of the connecting rod is mostly a thin-walled circular ring structure. In order to reduce the wear with the piston pin, a thin-walled bronze bushing is pressed into the small end hole. Drill or mill grooves on the small head and the bushing to allow the splashed oil to enter the mating surface of the lubricating bush and piston pin.
The shaft of the connecting rod is a long rod, and it bears a large force during work. In order to prevent its bending and deformation, the shaft must have sufficient rigidity.
(From:Pacific Automotive Network)