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US 12,252,210 B2Granted
Shock absorber
AssigneeHitachi Astemo, Ltd.
InventorTsubasa Kimura
Life of this patent
Estimating the term…
Abstract
A shock absorber includes a tubular outer tube, a tubular inner tube, a rod, a piston, an urging member, and a guide bush. The guide bush is a ring-shaped member arranged along an inner periphery of the outer tube, abuts against a front surface and a rear surface of the inner tube to movably hold the inner tube, and is separated from left and right side surfaces of the inner tube.
Claims20
A shock absorber comprising:
- a tubular outer tube that is connectable to either a vehicle wheel or a vehicle body;
- a tubular inner tube that includes a distal end provided inside the outer tube and a terminal end being connectable to either the vehicle wheel or the vehicle body to which the outer tube is not connected, is provided so as to be movable relative to the outer tube, and is filled with oil therein;
- a rod that is provided inside the inner tube and is supported by the outer tube or the inner tube;
- a piston that is fixed to the rod and is configured to generate a damping force when the inner tube moves relative to the outer tube;
- an urging member that is configured to urge the outer tube and the inner tube in a direction in which the outer tube and the inner tube are separated from each other;
- and
- a guide bush that is a ring-shaped member arranged along an inner peripheral surface of the outer tube, abuts against a front surface and a rear surface of the inner tube to movably hold the inner tube, and is separated from left and right side surfaces of the inner tube,
- wherein an inner peripheral surface of the guide bush has a cross-sectional shape with an axis of the inner tube as the normal direction, said cross-sectional shape being longer in a left-right direction than in a front-rear direction.
5 more elements
A shock absorber comprising:
- a tubular outer tube that is connectable to a vehicle body;
- a cylindrical inner tube that is a member made of steel in which a distal end is provided inside the outer tube, is provided so as to be movable relative to the outer tube, is filled with oil and includes a terminal end being connectable to a vehicle wheel;
- a rod that is provided inside the inner tube and is supported by the outer tube or the inner tube;
- a piston that is fixed to the rod and is configured to generate a damping force when the inner tube moves relative to the outer tube;
- an urging member that is configured to urge the outer tube and the inner tube in a direction in which the outer tube and the inner tube are separated from each other;
- and
- a guide bush made of an aluminum-based alloy that is an elliptical ring-shaped member arranged along an inner peripheral surface of the outer tube, abuts against a front surface and a rear surface of the inner tube to movably hold the inner tube, and is separated from left and right side surfaces of the inner tube,
- wherein as for a wall thickness of the guide bush, a thickness of portions thereof that abut against the front and rear surfaces of the inner tube is thickest, and a thickness of portions thereof that face the left and right side surfaces of the inner tube is thinnest, and the wall thickness of the guide bush is the thickest at an upper end, and is the thinnest at a lower end,
- wherein an inner peripheral surface of the guide bush has a tapered shape, in which an inner peripheral length is shortest at the upper end, and is longest at the lower end, and
- wherein an outer peripheral length of the guide bush is the same from the upper end to the lower end.
7 more elements
Dependencies are inferred from the claim text.