针对汽车发动机凸轮驱动中正时皮带在运转过程中张紧力不稳定,易产生振动和噪声的特点,开发了正时皮带用自动张紧轮。张紧轮轴承中心偏离于多盘阻尼器的摆动中心;利用摆动中心位置的偏移来调节皮带张紧力。张紧力由拉力弹簧或扭曲螺旋弹簧决定。这种张紧轮的结构减小了张紧力的波动,把张紧力控制在合理的范围内,降低了振动和噪声。 Aiming at the characteristics of timing belt instability and easy vibration and noise during the operation of the timing belt of the automotive engine cam, an automatic tensioner for the timing belt was developed. Tensioner roller bearing center deviation from the multi-disk damper center of swing; use the center of the swing position to adjust the belt tension. The tension is determined by the tension spring or the torsion coil spring. The structure of this idler reduces the fluctuation of the tension force and controls the tension within a reasonable range, reducing vibration and noise.