Solenoid valve and method for its manufacture
AssigneeHydraulik-Ring Antriebs- und Steuerungstechnik GmbH
InventorsBernd Niethammer, Andreas Knecht
Life of this patent
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Abstract
A solenoid valve has a solenoid including a push rod. The solenoid has a central axis along which the push rod is displaceable. A valve member with a piston is provided, and the valve member and solenoid are enclosed in a casing. The solenoid and the valve member are connected to one another before being mounted in the casing such that the solenoid and the valve member are movable relative to one another in a direction perpendicular to the central axis.
Claims23
A solenoid valve comprising:
- a solenoid comprising a push rod, said solenoid having a central axis along which said push rod is displaceable;
- a valve member comprising a piston;
- a casing;
- said solenoid and said valve member connected to one another before being mounted in said casing such that said solenoid and said valve member are moveable relative to one another in a direction perpendicular to said central axis;
- wherein said solenoid comprises an end face facing said valve member, said end face having an annular groove;
- and
- wherein said solenoid has a central bore in which said push rod is guided, said central bore having a central opening in said end face, said push rod projecting outwardly from said central opening, said central opening widening radially outwardly in a direction toward said valve member.
A solenoid valve comprising:
- a solenoid comprising a push rod, said solenoid having a central axis along which said push rod is displaceable;
- a valve member comprising a piston;
- a casing;
- said solenoid and said valve member connected to one another before being mounted in said casing such that said solenoid and said valve member are moveable relative to one another in a direction perpendicular to said central axis;
- wherein said solenoid comprises an end face facing said valve member, said end face having an annular groove;
- and
- wherein said annular groove has a radially inner sidewall extending at a slant radially outwardly.
A method of manufacturing a solenoid valve, said method comprising the steps of:
- machining into an end face of a solenoid an axially extending annular groove;
- radially widening a central bore of said solenoid such that an inner wall of said annular groove is radially outwardly deformed;
- producing a valve member with a cylindrical projection;
- press-fitting said cylindrical projection of said valve member into said annular groove for connecting said valve member and said solenoid to a unit.
Dependencies are inferred from the claim text.