Wear-resistant piston head

Abstract

The invention discloses a wear-resistant piston head used in the technical field of internal combustion engines. A pin shaft hole transversely penetrating the piston head is formed on the piston head, a plurality of piston ring grooves are formed above the pin shaft hole, a piston skirt part is arranged below the pin shaft hole, a radially raised step is arranged between the upper part of the pin shaft hole and the piston ring groove at the bottom, and the diameter at the step is equal to that of the piston skirt part. When the piston head is used, the inner diameter of the corresponding air cylinder is fitted with the diameter at the step, therefore, the diameter at the upper part of the piston is far smaller than the inner diameter of the air cylinder, the purposes of balancing the piston and adjusting the gap are achieved through a piston ring, simultaneously, the upper part of the piston is not in contact with the inner wall of the air cylinder during the working process, even if the operating conditions are bad and the piston is worn, the upper part of the piston can still keep a certain distance with the inner wall of the air cylinder to avoid the phenomenon of scuffing of cylinder bore and eccentric wear, and simultaneously, the piston head is not easily worn.

Description

technical field [0001] The invention relates to an internal combustion engine, in particular to a piston of the internal combustion engine. Background technique [0002] In the prior art, the piston of an internal combustion engine mainly includes a piston head, the piston head is provided with a pin hole that runs through the piston head transversely, a plurality of piston ring grooves are arranged above the pin hole, and the piston skirt is below the pin hole. , when working, a piston ring is installed in the piston ring groove, and the piston ring is in contact with the cylinder wall. The piston ring has an air ring and an oil ring, which play the role of bearing, guiding and scraping oil. In other words, there is no contact between the upper part of the piston head and the cylinder wall; however, with the change of the working conditions of the internal combustion engine and the wear of the piston ring itself, the piston head will directly contact the cylinder wall, caus...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the piston of an internal combustion engine mainly includes a piston head, the piston head is provided with a pin hole that runs through the piston head transversely, a plurality of piston ring grooves are arranged above the pin hole, and the piston skirt is below the pin hole. , when working, a piston ring is installed in the piston ring groove, and the piston ring is in contact with the cylinder wall. The piston ring has an air ring and an oil ring, which play the role of bearing, guiding and scraping oil. In other words, there is no contact between the upper part of the piston head and the cylinder wall; however, with the change of the working conditions of the internal combustion engine and the wear of the piston ring itself, the piston head will directly contact the cylinder wall, causing problems such as cylinder scuffing and cylinder eccentric wear

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