Abstract
Human civilization can unquestionably mechanical technology and machinery manufacture. Human civilization and progress,becasuce we constantly use tools and improve tools. In the modern society, Machinery is extension of primitive tools, whether working and entertainment or scientific research, it is essential.
As a single manipulation of portable fire-fighting cutting machine, it is widely used in the world. At present it is becoming more and more popular in our country. On the market, foreign products are better, but our products also have competitive.
The engine is the most important part. It is reflected the main product superiority by each company. Engine’s high strength is more bingger.The law about emissions, noise limiting is more and more strictly. The speed of the engine, the average effective pressure, the maximum breakout pressure enhances unceasingly. Engine performance is higher and higher.
Combining considerable amount of literatures with the trend of development of two stroke engine at home and abroad.With the existing products for auxiliary Considered each kind of load the assembly parts enduring, this paper design the assembly parts individually. The primary coverage includes choseing the compatible structure and the proper material for the piston,the piston ring,the piston pin and the connecting rod, calculating the important size parameter, examinating the intensity of the dangerous spot ,such as the piston pin and the rod. the main purpse is to ensure the structure of the assembly is reasonable,has a lightweight, durable and reliable.It’s designed by PROE,so we can intuitive understand this engine structure.
Keywords: Garden machinery; Gasoline chain saws; Two stroke engine; Designcheck
