| 摘要 |
PURPOSE:To absorb and relieve a fluctuation in tension produced corresponding to a fluctuation in the angular speed of the output shaft of an engine and to lengthen a belt life, by regulating the maximum tension into a value below a given value by means of a tension regulating means mounted to the maximum or a second tension span of a belt tension. CONSTITUTION:In case a tension regulating means 7 is installed to the maximum tension span 6A against a fluctuation in an angular speed omega of a crank shaft 2, the inertia force of a drive pulley 4 is exerted to a belt 6 by allowing the belt to follow the fuctuation in the crank shaft 2, and thus the span 6A first attampts to increase in a belt tension. An increase in the tension is regulated by the regulating means 7, and an idler pulley 8 moves against the force of an elastic body 9. This causes absorbing and relieving of the increase in the tension, resulting in suppressing said increase. Meanwhile, when the tension decreases, the belt 6 is energized by the elastic force of the elastic body 9 produced as a result of the belt restoring into the deformation of the elastic body to increase the tension, resulting in the reduction in the amplitude of fluctuation. Thus, as a result of the fluctuation in the angular speed of the crank shaft 2 being regulated by the tension regulating means 7, the fluctuation transmitted to the driven pulley 4 reduces. |
