The tensioner requires a certain amount of torque in order to maintain proper belt tension during actual use, avoid belt slippage, compensate for belt wear and elongation caused by aging. When the belt tensioner is running, the moving belt may provoke vibrations in the tensioner, causing premature wear of the belt and the tensioner. To this end, add a resistance mechanism to the tensioner. The tensioner is a consumable part of the automobile and other parts. The belt is easy to be stretched for a long time. Some tensioning wheels can automatically adjust the tension of the belt. In addition, the tensioner belt runs more smoothly and the noise is small. And can prevent slipping.

The tensioner is a belt tensioning device for the automobile transmission system. It is mainly composed of a fixed casing, a tensioning arm, a wheel body, a torsion spring, a rolling bearing and a spring bushing, etc., depending on the degree of tightness of the belt. The tension is automatically adjusted to make the drive system stable and safe.

Its role is to adjust the tightness of the timing belt, generally replaced with the timing belt, so as to avoid worries. Other parts do not need to be changed, as long as the maintenance can be done regularly, but the oil must be changed frequently, the general driving distance should be more than 4,000 to 5,000 kilometers. However, due to the many parameters affecting the torque and resistance of the tensioner, the influence of each parameter is not the same, so the relationship between the components of the tensioner and the torque and resistance is very complicated. Torque change directly affects the change of resistance, and it is the main influencing factor of resistance. The main factor affecting torque is the parameter of torsion spring. Appropriately reducing the diameter of torsion spring can increase the resistance value of tensioner.