A piston pin structure with self-lubricating function

Abstract

The invention relates to a piston pin structure with a self-lubricating function. The piston pin structure comprises a piston, a cylindrical piston pin, a small head hole and a connecting rod matchedwith the middle portion of the piston pin. The two end portions of the piston pin are matched with two piston pin seats arranged on a piston skirt correspondingly. The piston pin structure is characterized in that an oil storage part is arranged in the piston pin; the piston pin is provided with a piston pin outer surface and a piston pin inner hole which is axially through, and a circular ring protrusion is arranged at the middle portion of the piston pin inner hole; and a radial oil way is arranged at the middle portion of the outer surface of the piston pin, and the radial oil way communicates with the piston pin inner hole. By means of the piston pin structure with the self-lubricating function, lubricating oil can be continuously added between the piston pin and the connecting rod small head hole and is continuous added between the piston pin and the piston pin seats in the piston movement process, the lubricating oil can be led to all the parts on the piston pin, and abrasion between the piston pin and the connecting rod small head hole and abrasion between the piston pin and the piston pin hole are reduced.

Description

technical field [0001] The invention relates to an engine, in particular to a piston pin structure with self-lubricating function. Background technique [0002] The piston pin is a cylindrical pin mounted on the piston skirt, and its middle part passes through the small head hole of the connecting rod to connect the piston and the connecting rod. The function of the piston pin is to transmit the explosive pressure on the piston to the connecting rod to drive the crankshaft to rotate, so as to realize the operation of the engine. Piston pins are generally made of high-quality alloy steel. In order to reduce weight, the interior generally adopts a hollow structure. When the engine is running normally, the working environment of the piston pin is very harsh, with high temperature and high pressure. The lubrication method is generally boundary lubrication, which is only lubricated by the splashed lubricating oil from the piston cooling nozzle. Such harsh conditions make it di...

AI Technical Summary

Problems solved by technology

Such harsh conditions make it difficult to form a lubricating oil film between the piston pin, the small end hole of the connecting rod and the piston pin seat, resulting in abnormal wear on the piston pin, the small end hole of the connecting rod and the piston pin seat. beeping and other faults occur

[0003] The traditional piston pin relies on boundary lubrication during use, and abnormal wear will occur when the lubrication condition is insufficient. Therefore, it is necessary to provide a piston pin with self-lubricating function to solve the above technical problems

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