Pendulum type accessory tensioner

The utility model relates to a pendulum-type accessory tensioner, which comprises an elastic unit, the elastic unit comprises a main spring and an auxiliary spring, the main spring and the auxiliary spring have different rigidities, and the tension of an accessory belt is still kept constant even if different angular velocity variation is applied to the tensioner. 本实用新型涉及一种摆式附件张紧器，该摆式附件张紧器包括：弹性单元，其包括具有不同刚度的主弹簧和副弹簧，其中即使在向张紧器施加不同的角速度变化量时，附件带的张力仍然保持恒定。