Frequency-sensitive shock absorber and valve assembly employed thereto
AssigneeHl Mando Corporation
InventorSangyeon CHO
Life of this patent
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Abstract
The present disclosure provides a frequency-sensitive shock absorber capable of implementing target performance of damping force by preventing a valve portion formed of a rubber material or a synthetic resin material constituting a pilot valve of a valve assembly from peeling in a high-pressure and high-temperature environment and securing a flow path, and a valve assembly employed therein. An upper pilot valve and a lower pilot valve each include a base portion in the form of a metal plate and a valve portion integrally molded with the base portion as an elastic material passes through a molded hole formed in a penetrating manner in the base portion, and elastically deformed vertically.
Claims15
A valve assembly employed in a shock absorber, the valve assembly comprising:
- a housing provided in a shape of a ring through which a piston rod that reciprocates inside a cylinder passes through a center, in which hollows are provided in the upper and lower surfaces in a communicatable manner to form a pilot chamber;
- a main retainer coupled to the piston rod and disposed in a lower portion of the housing, an upper portion of which is opened to form a main chamber;
- a lower pilot valve coupled to the piston rod to be interposed between the housing and the main retainer so that upper and lower portions thereof are in close contact with the housing and the main retainer, respectively, to divide and simultaneously form the pilot chamber and the main chamber;
- and
- an upper pilot valve coupled to the piston rod and disposed on top of the pilot chamber and provided to be elastically deformable according to a change in pressure of the pilot chamber,
- wherein the upper pilot valve and the lower pilot valve each includes a base portion in the form of a metal plate and a valve portion integrally molded with the base portion as an elastic material passes through a molded hole formed in a penetrating manner in the base portion, and elastically deformed vertically.
A frequency-sensitive shock absorber including a piston rod that reciprocates inside a cylinder filled with working fluid, a piston valve mounted on the piston rod and reciprocating inside the cylinder in compression and tension stroke directions to generate damping force based on resistance of the working fluid, and a valve assembly mounted on the piston rod to be disposed below the piston valve and generating damping force that changes depending on a frequency during the tension stroke,
- wherein the valve assembly comprises:
- a housing provided in a shape of a ring through which a piston rod that reciprocates inside a cylinder passes through a center, in which hollows are provided in the upper and lower surfaces in a communicatable manner to form a pilot chamber;
- a main retainer coupled to the piston rod and disposed in a lower portion of the housing, an upper portion of which is opened to form a main chamber;
- a lower pilot valve coupled to the piston rod to be interposed between the housing and the main retainer so that upper and lower portions thereof are in close contact with the housing and the main retainer, respectively, to divide and simultaneously form the pilot chamber and the main chamber;
- and
- an upper pilot valve coupled to the piston rod and disposed on top of the pilot chamber and provided to be elastically deformable according to a change in pressure of the pilot chamber, wherein the upper pilot valve and the lower pilot valve each includes a base portion in the form of a metal plate and a valve portion integrally molded with the base portion as an elastic material passes through a molded hole formed in a penetrating manner in the base portion, and elastically deformed vertically.
Dependencies are inferred from the claim text.