| 摘要 |
PROBLEM TO BE SOLVED: To provide a damper pulley capable of suppressing the occurrence of abrasion.SOLUTION: A damper pulley comprises: a pulley 10 having an internal space and made rotatable by a power fed from the outside; a hub 20 arranged at least partially in the internal space and made rotatable for outputting a power to the outside; and a clutch spring 60 formed in a coil form and arranged in the internal space while an outer circumference contacting with the inner circumference of the pulley 10, a portion being connected to the hub 20 and twisted in response to the rotation of the pulley 10 thereby to switch the state, in which it is fixed on the inner circumference of the pulley 10 so that the power of the pulley 10 can be transmitted to the hub 20, and the state, in which it is slidable with respect to the inner circumference of the pulley 10 so that the power of the pulley 10 cannot be transmitted to the hub 20. The inner circumference of the pulley 10 and the outer circumference of the clutch spring 60 are formed with a CrN film.SELECTED DRAWING: Figure 1 |
