function
Generally, there are steps or grooves in the piston pin holes used in China, and there is a solid piston pin. The inner bore of the piston pin used abroad is straight. The shape of the inner hole of the piston pin:
The shape of the inner hole of the piston pin is mainly cylindrical, two-stage truncated cone, and a combination of two-stage truncated cone and one-stage cylinder.
Function and working conditions of piston pin:
The piston pin is used to connect the piston and the connecting rod, and transfer the force of the piston to the connecting rod or vice versa. The piston pin bears a large periodic impact load under high temperature conditions, and because the piston pin swings at a small angle in the pin hole, it is difficult to form a lubricating oil film, so the lubrication conditions are poor. For this reason, the piston pin must have sufficient rigidity, strength and wear resistance, and the mass should be as small as possible. The pin and the pin hole should have an appropriate clearance and good surface quality. In general, the stiffness of the piston pin is particularly important. If the piston pin is bent and deformed, the piston pin seat may be damaged.