Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1991-04-08
1994-09-13
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335202, H01H 6702
Patent
active
053472500
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an electromagnetic switching device with a drive space accommodating the magnet and the coil and formed by a base member, this drive space being connected in shape-mating fashion with a housing containing a switch contact space and connection contact spaces, this housing accommodating a contact support displaceable against a return spring with positively guided, movable bridge contacts attached by way of contact pressure springs, and the associated, fixed connecting contacts.
Three-phase contactors with induction coil switching in an air space are utilized with great versatility as power protection devices and auxiliary contactors; in these arrangements, the basic units can be completed and/or varied by further components in a module system.
It is known to combine the individual structural parts of a contactor relay into component groups and preassemble same to permit a maximally economical manufacture. The connecting of the individual components normally is brought about by shape-mating connections, optionally also by force-derived connections.
The invention is based on the object of making it possible to assemble the components and component groups of a switching device by means of automatic manufacturing machines.
This object has been attained, for the housing of an electromagnetic switching device containing the switch contact space and the connecting contact spaces in accordance with the preamble, by providing an arrangement in such a way that the parts of the connecting contacts and coil terminals, of the preassembled contact support with return spring, and of a switch space cover with an insertion means releasably attachable to the switch space cover, to be accommodated by the housing, are assembled in succession from only one direction (M) extending perpendicularly to the shifting direction (S) of the contact support, and are retained by means of interlocking connections. Thus, in accordance with the invention, the arrangements effecting the interlocking connections and the external configuration are fashioned in all participating structural parts so that all parts not serving for transmitting the power between drive means and contact bridge and being independent of the respective power system, ac or dc drive, can be mounted linearly from only one direction.
In a further development of the invention, the provision is made that, in each of the four current paths of the contact, it is possible to realize selectively make contacts or break contacts with the same structural parts. Suitable embodiments of the contact support, the bridge contacts, and the contact pressure springs can be derived from the features of claims 2-6. According to the invention, it is also possible to mount the contact support with the contact arrangement likewise by means of automatic manufacturing machines linearly from one direction. For the selective design as a make or break contact, the bridge contact is preferably fashioned to be offset so that, by reversal and/or a mirror-image arrangement, the alternate contacts can be realized at differing spring pressures.
An advantageous embodiment of the housing accommodating the switch contact space and the connecting contact spaces, in a tank-shaped configuration open toward the top, can be derived from the characterizing features of claim 7. All of the required components can be inserted linearly from above into the housing in succession; in this arrangement, they are fixed in place either by a shape-mating connection, such as locked-in-place connections, clip-on connections, snap-on connections, and plug-in connections, and/or in a force-derived fashion.
Due to the design of the housing in accordance with the characterizing features of claim 8, a guide groove is created on the bottom of the housing in the switch contact space wherein the inserted contact support is displaceably guided. Moreover, the contact support is equipped on its oppositely located topside with a parallel-extending groove engaged by a web of the switch space cover, this web forming t
REFERENCES:
patent: 4899120 (1990-02-01), Ohtake et al.
patent: 4951018 (1990-08-01), Schmiedel et al.
patent: 5012215 (1991-04-01), Floc'h
Donovan Lincoln
Klochner-Moeller Elektrizitats GmbH
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