a piston pin
The piston pin is a pin mounted in a cylindrical skirt portion of the piston, through the middle of its small connecting rod end, and for connecting the piston rod, the piston bear gas forces transmitted to the connecting rod. In order to reduce the weight of the piston pin is generally manufactured with high-quality steel, and made hollow.
of the piston pin functions and working conditions:
of the piston pin for connecting the piston and connecting rod, and passes opposite the piston rod or the force received. Piston pin at a high temperature under a lot of cyclical shock loads, and the pin hole in the piston pin pivot angle is small, it is difficult to form the lubricating film, the poor lubrication conditions. For this purpose the piston pin must have sufficient stiffness, strength and wear resistance as small as possible mass, pin and pin hole should have an appropriate clearance fit and good surface quality. In general, the stiffness of the piston pin is particularly important, if the piston pin bending deformation, may cause damage to the piston pin boss.
connected to form a piston pin
semi-floating piston pin
semi-floating piston pin: piston pin and the piston between the seat and the link pin head can freely rotate only one other of mutually form a fixed connection
full floating piston pin
full floating piston pin: are connected in the form of free rotation between the piston and the piston pin and connecting rod small end pin holder.