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US 10,330,170 B2Granted
Shock absorber
AssigneesKYB Corporation, Toyota Jidosha Kabushiki Kaisha
InventorsHirohito Kato, Seiichiro Komatsu, Yuusuke Furuta, Hirofumi Morinaga
Life of this patent
Estimating the term…
Abstract
A rod guide includes a housing portion and a depressed portion formed toward an outer periphery from a starting point located apart from a piston rod by ½ or more of a distance in an axial direction between a bottom surface of the housing portion and a flat portion of an oil seal in a radial direction closest to the piston rod, and a bush is disposed to be flush with the bottom surface or disposed to project.
Claims14
A shock absorber, comprising:
- a cylinder in which a hydraulic fluid is sealed;
- a free piston slidably inserted into the cylinder, the free piston partitioning inside of the cylinder into a liquid chamber and a gas chamber;
- a piston slidably inserted into the cylinder, the piston partitioning the liquid chamber into an extension-side chamber and a contraction-side chamber;
- a piston rod inserted movably into and out of the cylinder, the piston rod being coupled to the piston;
- a rod guide fitted onto an end portion of the cylinder on the liquid chamber side, the rod guide slidably supporting the piston rod via a bush disposed on an inner periphery;
- and
- an oil seal disposed on an opposite side of the liquid chamber on the rod guide, the oil seal sealing between the piston rod and the cylinder, wherein:
- the rod guide includes:
- a housing portion disposed on a surface of the oil seal side, the oil seal including a seal lip housed in the housing portion;
- and
- a depressed portion depressed on a bottom surface of the housing portion, the depressed portion being formed toward an outer periphery from a starting point located apart from the piston rod by ½ or more of a distance in an axial direction between the bottom surface and a flat portion of the oil seal in a radial direction closest to the piston rod, wherein
- the bush is disposed to be flush with the bottom surface of the housing portion, or to project from the bottom surface, and
- the rod guide has a corner portion of the bottom surface and the depressed portion formed in an R-chamfered shape on the piston rod side.
10 more elements
A shock absorber, comprising:
- a cylinder in which a hydraulic fluid is sealed;
- a free piston slidably inserted into the cylinder, the free piston partitioning inside of the cylinder into a liquid chamber and a gas chamber;
- a piston slidably inserted into the cylinder, the piston partitioning the liquid chamber into an extension-side chamber and a contraction-side chamber;
- a piston rod inserted movably into and out of the cylinder, the piston rod being coupled to the piston;
- a rod guide fitted onto an end portion of the cylinder on the liquid chamber side, the rod guide slidably supporting the piston rod via a bush disposed on an inner periphery;
- and
- an oil seal disposed on an opposite side of the liquid chamber on the rod guide, the oil seal sealing between the piston rod and the cylinder, wherein:
- the rod guide includes:
- a housing portion disposed on a surface of the oil seal side, the oil seal including a seal lip housed in the housing portion;
- and
- a depressed portion depressed on a bottom surface of the housing portion, the depressed portion being formed toward an outer periphery from a starting point located apart from the piston rod by ½ or more of a distance in an axial direction between the bottom surface and a flat portion of the oil seal in a radial direction closest to the piston rod, wherein
- the bush is disposed to be flush with the bottom surface of the housing portion, or to project from the bottom surface, and
- the rod guide has a corner portion of the bottom surface and the depressed portion formed in a C-chamfered shape on the piston rod side.
10 more elements
Dependencies are inferred from the claim text.