DAMPER AND OPERATION UNIT

摘要

The present invention enables a user to intuitively grasp the occurrence of prescribed phenomena during operation. Provided is a damper that restricts pivot pin (4) rotation associated with operation of an operating section, wherein the friction resistance that impedes the rotation of the pivot pin (4) is changed in a stepped fashion. When the pivot pin (4) rotates in direction α due to the depression of an accelerator pedal (operating section) (21), a slide cam (62) shifts an edge section (621A) of an inclined cam surface (621) in a direction A away from a rotating cam (61) while staying in contact with a gradual first inclined region (611A) of an inclined cam surface (611) of the rotating cam (61). Torque around the axis of the pivot pin (4) is produced, the entire region of the inclined cam surface (621) of the slide cam (62) comes into contact with a steep second inclined region (611B) of the inclined cam surface (611) of the rotating cam (61) upon depression of the accelerator pedal (21) to a prescribed position (the pivot pin (4) has rotated by a prescribed angle θ1 in direction α), and the torque around the axis of the pivot pin (4) rapidly increases

主权项

1. A damper for damping rotation of a rotating shaft, comprising:
a pair of cam members each having an inclined cam face inclined with respect to a rotation direction of the rotating shaft, upon a torque of the rotating shaft being transmitted to the cam members, the cam members rotating relative to each other about an axis of the rotating shaft and moving relative to each other in an axial direction of the rotating shaft with the inclined cam faces in sliding contact with each other; a housing part housing the pair of cam members and having an inner side surface, the pair of the cam members moving and rotating relative to each other slide on the inner side surface; and a friction resistance changing means changing a friction resistance impeding relative rotation of the pair of cam members stepwise by changing, in a stepwise manner, force of pressing the pair of cam members against an end portion of the housing part with increase of a relative rotation angle of the pair of cam members while pressing the pair of the cam members in the axial direction of the rotating shaft against the housing part at the end portion located in the axial direction of the rotating shaft so as to allow the pair of cam members to press against each other at the inclined cam faces.