Tensioner pulley with asymmetrical damping mechanism

Abstract

The present invention relates to a tensioning pulley for maintaining constant tension in flexible transmission members such as belts or chains, more particularly, the present invention relates to a tensioning pulley capable of providing a large frictional damping force when loaded and unloaded A tensioner with an asymmetrical damping mechanism that does not provide or only provides a small frictional damping force, which includes a pulley, a swing arm and a base, the swing arm and the base are connected together by a mandrel, and the swing arm and the base are connected together A closed cavity is formed, a biasing element and a damping mechanism are arranged in the cavity, a plurality of protruding support structures are arranged on the side of the swing arm facing the base, and the damping mechanism is composed of a damping member and the support structure Composition, the support structure is in contact with the biasing element and cooperates with the damper. The damping mechanism is used to generate frictional damping force to prevent and suppress the belt jitter caused by the running of the engine.

Description

technical field [0001] The present invention relates to a tensioning pulley for maintaining constant tension in flexible transmission members such as belts or chains, more particularly, the present invention relates to a tensioning pulley capable of providing a large frictional damping force when loaded and unloaded Tensioner pulleys with asymmetrical damping mechanisms that provide no or only low frictional damping forces. Background technique [0002] The front-end accessory drive system of the engine is an integral part of the car. Generally, the power of the car engine is transmitted from the crankshaft to the pulley connected to each accessory through a belt. These accessories include water pumps, air conditioning compressors, power steering pumps, alternators, etc. In this accessory drive system, one or more tension pulleys are usually included. A key role of the tension pulley is to drive the front end of the engine. Provide a certain tension of the belt so that the ...

AI Technical Summary

Problems solved by technology

This solution requires complex mechanical devices to control the movement of the swing arm, and at the same time needs to occupy a large space on the surface of the engine, and the cost is very expensive, so this solution is difficult to promote

[0007] The symmetric damping mechanism commonly used in tensioners on the market now provides the same frictional damping force in both loading and unloading directions, and the value of the frictional damping force is generally very small, because once the set frictional damping force exceeds Large, in the process of unloading the tensioning wheel, it is likely to appear: the swing arm of the tensioning wheel cannot return to the required position normally, the compliance of the tensioning wheel to the belt is poor, and the belt tension cannot be effectively provided, and the Can cause belt vibration, slip and noise in the drive system

However, the symmetrical damping mechanism can only provide a small frictional damping force when the tensioner is loaded, which will cause the swing arm to move too far in the loading direction, resulting in slippage and noise

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