| CPC F16F 9/145 (2013.01) [F16F 9/3235 (2013.01)] | 11 Claims |
|
1. A rotary damper comprising
a housing having a cylindrical inner chamber for liquid-tightly housing fluid and having a fixed vane formed in a wall shape along a radial direction in the inner chamber to prevent a flow of the fluid in a peripheral direction,
a rotor formed with a penetrating or bottomed tubular support portion in a shaft and having, at an outer peripheral portion of the shaft outside the tubular support portion, a movable vane turning to push the fluid while dividing an inside of the inner chamber, the rotor comprising a protruding shaft portion protruding in an axial direction of the rotor with respect to the movable vane at the shaft,
a lid provided at the housing to liquid-tightly close the inner chamber, and
at least two cells formed by the fixed vane and the movable vane in the inner chamber and having volumes increased or decreased according to a turning direction of the movable vane,
the rotary damper further comprising:
a cylindrical or shaft-shaped first rotor support portion formed at one of the housing or the lid to turnably support an inner peripheral surface of the tubular support portion of the rotor; and
a second rotor support portion provided at another one of the housing or the lid to turnably support the shaft of the rotor, the second rotor support portion being formed in a cylindrical shape turnably supporting the protruding shaft portion,
wherein the first rotor support portion supports the tubular support portion at a center portion of a length of the movable vane in the axial direction of the rotor,
a first seal and a first bearing are provided at an inner peripheral portion of the first rotor support portion, the first bearing is attached at a tip end portion of the first rotor support portion, and
a second seal and a second bearing are provided at an inner peripheral portion of the second rotor support portion, the second bearing is attached at a tip end portion of the second rotor support portion.
|