Crankshaft
Gudgeon Pin/Piston Pin
Both con-rod length and shape of the crankshaft affect piston stroke
The crankshaft converts the linear motion of the piston into rotation of the crankshaft.
In essence, the the displacement of the piston is porportional to the sine of the phase of the crankshaft. this isn't quite true but it gives a rough idea of what is happening. if you meant what happens in one cycle of a piston/crankshaft then it is essentially this: as the piston moves down it forces the crankshaft through one half of a revolution and then on the way back up the piston forces the crankshaft through the remaining half of a revolution - back to its start position to start again
crankshaft
The piston includes the piston, rings, rod, rod bearing, and crankshaft bearing.
The piston is moved by the connecting rod which in turn is moved by the crankshaft. It is only on the power stroke that the piston moves the connecting rod, crankshaft and all the rest of the engine, in all the other strokes the engine, crankshaft and connecting rod move the piston.
it connects the piston to the crankshaft
connecting rod
the piston is operated by the crankshaft
It transfers force from the expanding gas in the cylinder to the crankshaft via a piston rod.