Solenoid valve for brake system

A solenoid valve for a brake system, the solenoid comprising:

• a valve seat including an orifice penetrating the valve seat in an axial direction;
• a plunger configured to open or close the orifice by moving back and forth in the axial direction;
• an elastic member configured to provide an elastic force in a direction in which the plunger opens the orifice;
• an armature provided on an upper side of the plunger and configured to move back and forth in the axial direction together with the plunger;
• a magnetic core accommodating the valve seat, the plunger, and the elastic member therein, and configured to provide a driving force to the armature in a direction in which the plunger closes the orifice;
• a sleeve accommodating the armature therein such that the armature is movable back and forth in the axial direction inside the sleeve, the sleeve being coupled to the magnetic core;
• and
• a damper provided between the armature and the sleeve, and configured to be elastically deformed toward the armature at an outer circumferential portion by being pressed to an inner upper end of the sleeve by an elastic force provided by the elastic member, and be elastically restored upward at the outer circumferential portion by being spaced apart from the inner upper end of the sleeve by a driving force provided by the magnetic core,
• wherein the damper comprises a body portion inserted in a coupling groove provided in an upper side of the armature, and a head portion being at least two or more bending arms divided by a slot extending in a diameter direction, the head portion being provided at an upper end of the body portion,
• wherein the body portion includes at least two or more long grooves extending in an axial direction, and
• wherein each of the long grooves is positioned at the same location in axial direction as the slot.

A solenoid valve for a brake system, the solenoid including:

• an armature positioned inside a sleeve and configured to move up and down along an axial direction together with a plunger to open or close an orifice of a valve seat;
• and
• a damper provided between the armature and an inner upper end of the sleeve,
• wherein the damper comprises:
• a body portion inserted in a coupling hole provided in an upper side of the armature;
• and
• a head portion being at least two or more bending arms divided by a slot extending in a diameter direction, the head portion being provided at an upper end of the body portion,
• wherein the head portion includes:
• a first rounding portion extending from an upper end of the body portion on a lower surface of the head portion;
• a taper portion corresponding to the lower surface of the head portion, and extending outward from the first rounding portion in such a way as to be inclined upward from a center of the head portion;
• and
• a second rounding portion formed on an upper surface of the head portion and bent from the taper portion.