In the heart of precision engineering, the connecting rod group stands as a testament to strength and resilience. Comprising the connecting rod body, big head cover, small head bushing, big head bearing bushing, and connecting rod bolt (or screw), this assembly is engineered to withstand the mightiest forces. As it receives the gas force from the piston pin, balances its oscillation, and counters the piston group's reciprocating inertia force, these forces continuously shift in magnitude and direction. Thus, the connecting rod endures alternating loads, both compressive and tensile. It is imperative that the connecting rod possesses exceptional fatigue strength and structural stiffness. A deficiency in fatigue strength can precipitate catastrophic failures, such as the breaking of the connecting rod body or bolts, potentially leading to extensive machine damage. Insufficient stiffness may cause bending deformations in the rod body, and circular deformation in the big head of the rod, resulting in uneven wear of the piston, cylinder, bearing, and crank pin.
The connecting rod body is ingeniously crafted into three distinct sections. The part interfacing with the piston pin is aptly termed the connecting rod's small head. Meanwhile, the segment linked with the crankshaft is known as the big head of the connecting rod. The crucial portion that bridges the small head and the big head is designated as the connecting rod body.
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