Solenoid valve with improved damping and method for producing same
AssigneeKNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
InventorsChristoph Hoffmann, Friedbert Roether, René Jonkmann
Life of this patent
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Abstract
A solenoid valve including a first connection, a second connection, an armature and a coil for moving the armature. The solenoid valve comprises: a first closure part which is coupled to the armature and opens or closes the first connection as a result of a movement of the armature; a second closure part which is coupled to the armature and opens or closes the second connection as a result of the movement of the armature; and a damping spring which is arranged between the first closure part and the second closure part and is configured to dampen the closing process of the first connection and/or the second connection.
Claims13
A solenoid valve, comprising:
- a first connection and a second connection;
- an armature;
- a coil for moving the armature;
- a first closure portion, which couples to the armature, and which in response to a movement of the armature opens or closes the first connection, wherein a movement direction of the armature defines an axial direction;
- a second closure portion, which couples to the armature, and which in response to a movement of the armature closes or opens the second connection;
- and
- a damping spring, which is arranged between the first closure portion and the second closure portion, and which is configured to cushion the closure of the first connection and/or the second connection;
- wherein:
- the first and the second closure portion each have a head/shoulder region for closing the associated first or second connection, and
- the armature has a projection which protrudes radially into the inner space and, at an opposing end, an annular recess having a stop element, wherein the projection is configured to form a stop for the head/shoulder region of the first closure portion and the recess is configured in order, after the insertion of the first closure portion, the damping spring and the second closure portion via the stop element to fix the second closure portion with respect to the axial direction.
A solenoid valve, comprising:
- a first connection and a second connection;
- an armature;
- a coil for moving the armature;
- a first closure portion, which couples to the armature, and which in response to a movement of the armature opens or closes the first connection;
- a second closure portion, which couples to the armature, and which in response to a movement of the armature closes or opens the second connection;
- and
- a damping spring, which is arranged between the first closure portion and the second closure portion, and which is configured to cushion the closure of the first connection and/or the second connection;
- wherein the armature extends cylindrically around the first closure portion and around the second closure portion and has a portion which protrudes axially over the first closure portion and a longitudinally extending side channel, and
- wherein the armature has at least two through-openings between an inner region of the armature and the side channel, of which a first through-opening is formed in the protruding portion and a second through-opening is formed in a region of the armature which is located axially between the first closure portion and the second closure portion to provide a pressure compensation between the inner region and an outer region of the cylindrical armature.
A method for producing a solenoid valve, the solenoid valve having a first connection, a second connection, an armature having a cylindrical inner space and a coil for moving the armature, the method comprising:
- inserting a first closure portion in the inner space of the armature;
- inserting a damping spring in the inner space of the armature;
- and
- inserting a second closure portion in the inner space of the armature,
- wherein the first closure portion and the second closure portion are configured in order, when the armature is moved, to alternately open or close the first connection or the second connection, while the damping spring provides a damping when the first connection and/or the second connection is/are closed, wherein a movement direction of the armature defines an axial direction;
- wherein:
- the first and the second closure portion each have a head/shoulder region for closing the associated first or second connection, and
- the armature has a projection which protrudes radially into the inner space and, at an opposing end, an annular recess having a stop element, wherein the projection is configured to form a stop for the head/shoulder region of the first closure portion and the recess is configured in order, after the insertion of the first closure portion, the damping spring and the second closure portion via the stop element to fix the second closure portion with respect to the axial direction.
Dependencies are inferred from the claim text.