Frequency-sensitive shock absorber
AssigneeHl Mando Corporation
InventorSewon Cho
Life of this patent
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Abstract
A frequency-sensitive shock absorber according to an embodiment of the present disclosure includes a valve assembly configured to generate a damping force that varies depending on a magnitude of a frequency, in which the valve assembly includes a main retainer having a main chamber configured to communicate with an injection flow path formed in a piston rod or a body pin, a main valve configured to open or close the main chamber, a housing having a pilot chamber having one side facing the main valve and the other side communicating with the injection flow path, and a pilot valve configured to cover the pilot chamber and press the housing toward the main valve while being elastically deformed when pressure in the pilot chamber is higher than a preset pressure.
Claims20
A frequency-sensitive shock absorber comprising:
- a piston rod configured to reciprocate in a cylinder and having an injection flow path;
- a piston valve mounted on the piston rod and configured to divide the cylinder into a compression chamber and a rebound chamber;
- and
- a valve assembly mounted on the piston rod and configured to generate a damping force that varies depending on a magnitude of a frequency in an extension stroke,
- wherein the valve assembly comprises:
- a main retainer coupled to the piston rod and having a main chamber configured to communicate with the injection flow path;
- a main valve coupled to the piston rod and configured to open or close the main chamber;
- a housing coupled to the piston rod and having a pilot chamber having one side facing the main valve, and the other side communicating with the injection flow path;
- and
- a pilot valve coupled to the piston rod and configured to cover the pilot chamber, the pilot valve being configured to press the housing toward the main valve while being elastically deformed when pressure in the pilot chamber is higher than a preset pressure.
A frequency-sensitive shock absorber comprising:
- a first cylinder divided into a compression chamber and a rebound chamber by a piston rod, which reciprocates in the first cylinder, and a piston valve mounted on the piston rod;
- a second cylinder configured to surround the first cylinder to define a reserve chamber between the first cylinder and the second cylinder;
- a body valve installed at an end of the compression chamber of the first cylinder and configured to adjust a flow of a working fluid between the compression chamber and the reserve chamber;
- a body pin fastened to penetrate the body valve and having an injection flow path configured to communicate with the compression chamber;
- and
- a valve assembly mounted on the body pin and configured to generate a damping force that varies depending on a magnitude of a frequency in a compression stroke,
- wherein the valve assembly comprises:
- a main retainer coupled to the body pin and having a main chamber configured to communicate with the injection flow path;
- a main valve coupled to the body pin and configured to open or close the main chamber;
- a housing coupled to the body pin and having a pilot chamber having one side facing the main valve, and the other side communicating with the injection flow path;
- and
- a pilot valve coupled to the body pin and configured to cover the pilot chamber, the pilot valve being configured to press the housing toward the main valve while being elastically deformed when pressure in the pilot chamber is higher than a preset pressure.
Dependencies are inferred from the claim text.