| 摘要 |
<p>[Problem] In order to enable a lubricant to be supplied continuously to the contact area of one end of arm members and a cam surface, thus improving the lubrication capability at the contact area of the one end of the arm members and a cam member, and preventing wear, seizing and the like at the contact area of the one end of the arm members and the cam surface, a torsional oscillation damping device (1) has an annular part (21), which is attached to a disk plate (7) so as to surround a cam member (2) and arm members (16), and with which a portion of a grease (24) is held in the space between an inner circumferential part (21a) and the outer peripheral part of the arm members (16) in the radial direction when the grease (24) is scattered by centrifugal force and adheres to the inner circumferential part (21a) as the torsional oscillation damping device (1) rotates. Furthermore, the curved shape of the outer circumferential part (16c) of the arm members (16) is set with respect to the shape of the inner circumferential part (21a) of the annular part (21) such that when the arm members (16) turn so as to move one end part (16a) of the arm members (16) from the radially inward direction of the cam surface (2a) to the radially outward direction, the distance between the outer circumferential part (16c) of the arm members (16) and the inner circumferential part (21a) of the annular part (21) maintains a positional relationship wherein the distance increases gradually from the outer circumferential base point part (16d) of the arm members (16) toward the base end part (26a) of guide plates (26).</p> |
