US 2025/0180091 A1 · DAMPING FORCE-VARIABLE SHOCK ABSORBER

Abstract

A damping force-variable shock absorber is disclosed. A damping force-variable shock absorber according to the present embodiment includes: a damping force control valve; and a solenoid for driving the damping force control valve, wherein the solenoid includes: a case having an opening formed through one side thereof to communicate with the damping force control valve; a coil provided in the case and providing a magnetic field; a rod moving along the longitudinal direction of the case and having one end extending through the opening; a plunger for holding the rod and moving the rod along the longitudinal direction under the influence of a magnetic field; a core through which one end of the rod extends to support the rod; and a guide disposed at the side of the other end of the rod to be fixed to the case and having a tapered sidewall formed at a lower part thereof.

Claims20

Dependent claims

A damping force-variable shock absorber comprising a damping force control valve and a solenoid that actuates the damping force control valve,

wherein the solenoid includes:
a case that has an opening in one side thereof to communicate with the damping force control valve;
a coil that is disposed inside the case to supply a magnetic field;
a rod that moves along a longitudinal direction of the case and has one end portion inserted through the opening;
a plunger that holds the rod and moves the rod along the longitudinal direction under an influence of the magnetic field;
and
a core through which the one end portion of the rod passes so that the rod is supported;
and
a guide that is disposed on another end portion of the rod to be fixed to the case and has a side wall formed in a tapered shape on a lower portion thereof.

6 more elements

A damping force-variable shock absorber comprising a damping force control valve, and a solenoid having a rod that moves toward an inside of the damping force control valve when a current corresponding to a first section of a low current is applied,

wherein the damping force control valve includes:
a piston in which a main path and a bypass path are defined;
a pair of main retainers that are disposed above and below the piston and each have a connection passage to be connected to the main path;
a pair of pilot housings that are disposed on opposite surfaces of the main retainers, respectively, to form pilot chambers in directions facing each other;
a pair of pilot valves that are disposed between the pilot chambers and the main retainers and are open during a stroke such that the connection passage and a compression chamber or a rebound chamber are connected to each other;
a pair of check valves that are disposed on opposite surfaces of the pilot housings to open and close the pilot chambers;
a spool that moves in conjunction with movement of the rod and is inserted through centers of the main retainers, the pilot housings, and the pilot valves;
a spool guide that guides the spool and branches the connection passage to the compression chamber or the rebound chamber;
and
a pair of disks that are supported between the main retainers and the pilot valves, respectively.

7 more elements

Dependencies are inferred from the claim text.

Damping force-variable shock absorber

Life of this patent

Damping force-variable shock absorber

Life of this patent

Abstract

Claims20