Method for manufacturing a pole tube, a pole tube for an electromagnet and a solenoid valve
AssigneeRobert Bosch GmbH
InventorChristof OTT
Life of this patent
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Abstract
A method for manufacturing a pole tube having two magnetic pole tube components and having one nonmagnetic ring, which is situated axially between the pole tube components, for an electromagnet, in particular for a solenoid valve of an automatic transmission in a motor vehicle, including the following: concentric configuration and/or centering of the pole tube components and of the ring, in particular on a centering pin; form-fitting connection, in particular by extrusion coating and/or casting an exterior lateral surface of the pole tube components and of the ring.
Claims20
A method for manufacturing a pole tube for an electromagnet, the method comprising:
- providing at least one of concentric configuration and centering of the pole tube components and of the ring, in particular on a centering pin;
- and
- providing a form-fitting connection of the pole tube components and of the ring;
- wherein the pole tube includes two magnetic pole tube components and one nonmagnetic ring, which is situated axially between the pole tube components.
A pole tube for an electromagnet, comprising:
- a nonmagnetic ring situated axially between a pole core and a magnet tube, the pole core, the ring and the magnet tube being situated concentrically to one another;
- wherein an exterior lateral surface of the pole core, of the ring and of the magnet tube is extrusion coated using an extrusion coating or casting material.
An electromagnet for a solenoid valve, comprising:
- a pole tube, including a nonmagnetic ring situated axially between a pole core and a magnet tube, the pole core, the ring and the magnet tube being situated concentrically to one another, wherein an exterior lateral surface of the pole core, of the ring and of the magnet tube is extrusion coated using an extrusion coating or casting material, and wherein the pole core, the ring and the magnet tube have the same inside diameter;
- wherein a bearing foil is provided between the pole tube and a lateral surface of an armature situated in the pole tube.
Dependencies are inferred from the claim text.