Patent ID: 9702425
Date: 2017-07-11
CPC Classifications: F16F

Claim:
1. A rotary damper, comprising: a shaft that is provided to be capable of rotating about a central axis and has a hollow portion in an interior thereof; a pair of side panels that support the shaft rotatably; a case provided between the pair of side panels such that an operating chamber is defined in an interior thereof; a vane provided on the shaft such that a tip end thereof slides against an inner periphery of the case, thereby dividing the operating chamber into a first chamber and a second chamber; a liquid chamber defined within the hollow portion; a partitioning member housed in the hollow portion and defining the liquid chamber, the partitioning member having an outer periphery in contact with an inner periphery of the hollow portion; a first partition wall housed in the hollow portion and being separated from the partitioning member in an axial direction; a second partition wall housed in the hollow portion and being separated from the first partition wall in the axial direction; a first side valve chamber that is defined in the hollow portion between the first partition wall and the partitioning member, and communicates with the first chamber; a second liquid chamber that is defined in the hollow portion between the first partition wall and the second partition wall, and in constant communication with the liquid chamber; a second side valve chamber that is defined in the hollow portion by the second partition wall, and communicates with the second chamber; a first side port provided in the first partition wall and connecting the first side valve chamber to the second liquid chamber; a second side port provided in the second partition wall and connecting the second side valve chamber to the second liquid chamber; a first side damping valve capable of opening and closing the first side port; and a second side damping value capable of opening and closing the second side port.