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US 2004/0104795 A1Published application
Magnet coil arrangement
AssigneeBosch Rexroth AG
InventorsMatthias Stitz, Achim Richartz
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AssigneeBosch Rexroth AG
InventorsMatthias Stitz, Achim Richartz
Estimating the term…
In a magnet coil arrangement having a wound coil former and having a metal housing surrounding the wound coil former, contact tabs are held in a plug-in base, one of which serves as a protective conductor connection. The contact tab serving as a protective conductor connection is held on the metal housing by a metallic connecting part. The free spaces between the wound coil former, the metal housing and the plug-in base are encapsulated with plastic. At the interfaces between the metal parts and plastic, moisture can enter the magnet coil arrangement. In order to prevent this moisture getting into the connecting space, in which electric feed lines coming from the outside are connected to the contact tabs, in the area in which the connecting part engages in the contact tab, the contact tab serving as a protective conductor connection is arranged inside the plug-in base. Between the connecting part and the plug-in base there is arranged a sealing part, of which a first sealing face rests on the connecting part and a second sealing face rests on the plug-in base. The magnet coil arrangement is provided to operate valves which are used in fluid engineering.
A magnet coil arrangement, in particular for operating valves,
The magnet coil arrangement as claimed in one of the preceding claims, characterized by the fact that the connecting part (21) is provided with a shoulder (21b) between the part (21d) that engages in the metal housing (13) and the part (21a) which is enclosed by the sealing part (23).
The magnet coil arrangement as claimed in one of the preceding claims, characterized by the fact that the connecting part (21;
The magnet coil arrangement as claimed in one of the preceding claims, characterized by the fact that at least one side surface of the plug-in base (14) is provided with a projection (14a, 14b) between the outwardly pointing side (14c) and that side (14d) of the plug-in base (14) which faces the metal housing (13).
The magnet coil arrangement as claimed in one of the preceding claims, characterized by the fact that that side (14b) of the plug-in base (14) which faces the metal housing (13) is provided with at least one recess (14e, 14f, 14g) surrounding the connecting part (21).
The magnet coil arrangement as claimed in one of the preceding claims, characterized by the fact that the plug-in base (14″) is provided with a first recess (20) to accommodate the connecting part (21) and with a second recess (28) to accommodate that area of the contact tab (15) which serves as the protective conductor connection and in which the connecting part (21) engages.
Dependencies are inferred from the claim text.