Countershaft combination of reverse gear embedded engine

Abstract

The invention discloses a built-in countershaft assembly of a reverse engine, which is characterized in that a first gear is sheathed on the countershaft; a shaft liner is arranged between an annular boss at the center of the first gear and the countershaft; countershaft oil holes radially penetrating through a center hole of the countershaft are formed on the walls of the countershaft; shaft line oil holes are formed on the walls of the corresponding shaft liner; annular oil grooves are arranged on the external circumference at the outlets of the countershaft oil holes and are respectively communicated with the countershaft oil holes and the shaft liner oil holes; and an oil groove is also formed on the inner wall of the annular boss of the first gear and respectively penetrates to two end faces of the boss at both ends. The built-in countershaft assembly can ensure good lubrication effect among the countershaft, the shaft liner and the first gear of the countershaft to effectively the frictional resistance occurred on the contact surfaces of the countershaft, the shaft liner and the first gear, thus preventing heat generation and abrasion of the parts, eliminating the occurrenceof ablation on working surface, and greatly prolonging the service lives of relative components such as the countershaft, the shaft liner and the first gear of the countershaft while ensuring the performance of the countershaft assembly of the engine.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a countershaft combination of a built-in reverse gear engine. Background technique [0002] The general built-in reverse gear engine countershaft combination is made of components such as countershaft, first gear, second gear, third gear, reverse gear, fourth gear and axle sleeve. Among them, the third gear and the fourth gear are installed on the auxiliary shaft through the key and keyway with clearance fit, the first gear, the second gear and the reverse gear are also set on the auxiliary shaft, and the reverse gear is located between the third gear and the fourth gear. Between the gears, the second gear is located on the outside of the fourth gear, and the first gear is located on the outside of the third gear, and a shaft sleeve is arranged between the annular boss in the middle of the first gear and the layshaft. When the engine is in reverse gear, the first gea...

AI Technical Summary

Problems solved by technology

Since the first gear of the countershaft must bear a certain load, and motorcycles with built-in reverse gear are often used in reverse gear, it must be well lubricated between the countershaft and the bushing and between the bushing and the first gear of the countershaft. There is a small amount of oil film formed between the auxiliary shaft and the shaft sleeve and between the shaft sleeve and the first gear of the auxiliary shaft, which is difficult to meet the lubrication requirements. Friction will be generated on the surfaces where they contact each other, and friction will generate resistance, which consumes power. In addition, the components will be heated and worn, and it will also cause ablation on the working surface

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