Engine balance shaft mechanism

Abstract

The invention discloses an engine balance shaft mechanism which comprises a balance shaft support, an installation plate, an eccentric device, a first balance shaft and a second balance shaft. The eccentric device is arranged at the opposite ends of the first balance shaft and the second balance shaft, and comprises fixed discs and connecting discs, the connecting discs are in eccentric connection with the first balance shaft and the second balance shaft, and a plurality of annularly-arranged connecting rods are connected to the interiors of the fixed discs; a plurality of grooves are formed in the outer rings of the fixed discs, metal blocks are arranged inside the grooves, hydraulic rods are arranged at the tail ends of the connecting rods, and stopping bases are arranged at the outer ends of the connecting rods; the first balance shaft, the second balance shaft and the connecting discs are connected together, and the top ends of the fixed discs are connected together through the installation plate; and a noise reduction wall is arranged on the surface of the installation plate. By means of the device, the quality of the connecting discs can be freely adjusted, different requirements are met, the good noise elimination capacity is wholly achieved, noise can be directly reduced while engine vibration is reduced, and the engine balance shaft mechanism is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a balance shaft mechanism of an engine. Background technique [0002] The balance shaft can be divided into two types: single balance shaft and double balance shaft. As the name implies, the single balance shaft adopts a single balance shaft and uses gear transmission to work. The crankshaft rotates to drive the fixed balance shaft drive gear, balance shaft driven gear and balance shaft. The single balance shaft can balance a large proportion of the entire vibration. First-order vibration, the vibration of the engine is significantly improved. Due to its simple structure and small footprint, the single balance shaft is widely used in single-cylinder and small-displacement engines. The double balance shaft uses a chain transmission method to drive two balance shafts to rotate, one of which has the same speed as the engine, which can eliminate the first-order vibration of the eng...

AI Technical Summary

Problems solved by technology

[0004] However, when the balance shaft is in use, the quality of the eccentric block cannot be adjusted according to the different rotational speeds, so that the best effect cannot be guaranteed during use, and at the same time, it does not have the ability to eliminate noise, which is not conducive to use

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