DE1280409B - Electromagnetic relay with hinged armature - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

HOIh

German KI .: 21g-4/01

Number: 1 280 409

File number: P 12 80 409.0-33 (S 80836)

Filing date: August 9, 1962

Opening day: October 17, 1968

The invention relates to an electromagnetic relay with hinged armature, in which the from The core and yoke consist of a single U-shaped component with a magnet system extending over its entire length consists of the same iron cross-section, the dimensions of the core and yoke cross-section being different are.

In the known relays, the magnetic circuit usually consists of the armature, the yoke and the core with attached pole piece, whereby the core consists either of round or flat material. Usually the core is connected to the yoke by screwing, riveting or welding. There If this is not a homogeneous connection, magnetic contact resistances occur which degrade the efficiency of the relay. In addition, there is also the amount of work involved Assembly of core and yoke, which have to be manufactured individually, already weighs in. As part of a mechanized production both ao the requirement to achieve material savings, as well as to provide as few work processes as possible that are time-consuming and within the scope of the Manufacturing large numbers of items are significant.

It is already known to design the yoke and core of an electromagnet system as a U-shaped component, the iron cross-section along the entire length of the magnetic core and yoke Circle is constant. Nevertheless, in the previously known embodiments in the Manufacture of the U-shaped component mostly by machining operations as well as complicated bending processes required, which means that there is a need for expensive subsequent tools in production to be provided. As a rule, a cutting tool is used to manufacture the U-shaped magnet system required, in addition to which a bending tool is always used to achieve the U-shape must come.

In a known embodiment, the core profile to adapt to the clear width of the Excitation coil achieved by folding the rectangular core material. About this folding To be able to carry out, a constriction is necessary at the transition between the yoke and the core. This transition section must also be relatively long to accommodate the change in shape to be able to carry out without the risk of material destruction. But this transition section stands for the excitation coil is not available, and thus there is a waste of high quality in production Magnetic material a.

Electromagnetic relay with hinged armature

Applicant:

Siemens Aktiengesellschaft, Berlin and Munich, 8000 Munich 2, Witteisbacherplatz 2

Named as inventor:

Josef Fischer,

Herbert Krautwald,

Wolfgang Huebner, 8000 Munich

To these disadvantages, which are particularly evident in the manufacture of a magnet system as a mass-produced article occur, switch off, there is according to the invention the core and yoke forming U-shaped component from rolling iron of different thicknesses. The main advantage of this is that it is too see that the work involved in producing the magnet system is considerable compared to known solutions is lower, since expensive subsequent tools can be saved. Since when using a Such rolled iron strips can dispense with folding the core part, this is also unnecessary Presence of a transition section between the yoke and the core. This results in the production an optimum of simplicity of manufacture and considerable material savings compared to the known solutions. Incidentally, there is no oversizing of the yoke and core, anyway the dimensions are chosen differently for structural reasons. Appropriately is the rolled iron section forming the core and yoke before the U-shaped bending out of the rolled iron strip different thicknesses separated. The webs that remain when the components are separated can be used Use as locking lugs to hold a protective cap of the relay. Advantageously, the Yoke serving end of the U-shaped component has its own cross-section, the width of which corresponds to the outer dimension of the corresponds to the excitation coil that can be pushed onto the core.

An expedient embodiment of the invention provides that the end face of the yoke is in connection forms the anchor bearing with a longitudinal embossing on the core. You can also get to the core Produce slide-on bobbin of the excitation coil as an injection-molded part. This bobbin can have latching lugs have, which after the postponement of the

809 627/1131

Engage the excitation coil on the core in the corresponding recesses in the yoke and / or in the core. Further details of the invention emerge from the following description of an exemplary embodiment. It shows

F i g. 1 the electromagnetic relay with hinged armature according to the invention,

2a to 2c the design of the anchor bearing, partly in section,

F i g. Figure 3 shows a core and yoke strip arrangement during the manufacturing process.

The in Fig. 1 has an electromagnetic relay shown from the Kernl and the yoke 2 existing Magnet system, which is a single U-shaped component with the same leg lengths represents. A rolled profile is selected as the starting material for this component. To be inside the magnetic circuit To obtain equal iron cross-sections for the exciter size, the narrower core 1 has the Thick si, while the wider yoke 2 is the thick 2 having. With HiMe of the selected rolled profile, these differences in thickness can be eliminated without cutting Machining can be achieved. Because the leg lengths of the U-shaped component and thus the yoke and core are of the same length, they can be milled or ground to length in one operation be compressed to the same lengths even when using appropriate holding devices.

The armature 5 is stored according to FIG. 2 through the end face of the yoke 2 in connection with a longitudinal embossing 5 a. The longitudinal embossing 5 α ensures that the armature 5 resting on the front edge of the yoke 2 receives a corresponding guide, the rest position of the armature 5 being reached by the armature spring 6. In order to achieve lateral guidance of the armature, a rectangular wart Sc can be immersed in a recess 2 & of the yoke 2.

In the attracted state, the armature 5 rests completely flat on the yoke and on the core 1 of the magnet system, which acts as a pole face. The armature 5 is held by the armature spring 6 in that the two spring legs 6 a snap into corresponding locking lugs 2 a of the yoke 2. This fastening of the armature allows the armature, and also subsequently the excitation coil 3, to be removed from the core.

On the armature 5, the armature arm 8 is attached, on which the actuating member 7 for the contact arrangement is located. In order to be able to adjust the armature stroke if necessary, the armature arm 8 has a Target bending point 8 a. The contact arrangement consists essentially of the stationary contact elements 12, which in conjunction with that of the actuator? moving contact spring 13 a toggle form contact arrangement. The connections to the stationary contact elements and to the contact spring, but the connections of the excitation coil 3 are also routed to contact blades 14. For the protective cap U there is a possibility of locking through the webs 4 used as locking lugs, which when separating the the parts forming the magnet system remain on them.

In Fig. 3 shows schematically a strip arrangement for the production of the magnet system, the production phase I reproducing the already perforated and punched rolled profile. After the bending process has been carried out, the upper lobe corresponds to the core 2, while the lower lobe represents the yoke 1. The punched-out lugs 2 α, which serve to receive the spring legs 6 a of the armature spring 6, can also be seen here. The holes 15, which are provided with a thread during the manufacturing phase V, are used to fasten the magnet system on the insulating material plate 10 by means of corresponding fastening bolts 9 (FIG. 1). To ground nor a suitable terminal 9 a may be provided at this point. In Fig. 3 also shows how, after the individual components have been separated from the strip, the webs 4 remain, which later serve as locking lugs for the protective cap 11.

Claims (7)

Patent claims: 1. Electromagnetic relay with hinged armature, in which the core and yoke Magnet system made of a single U-shaped component with the same length over its entire length Iron cross-section consists, with the dimensions of the core and yoke cross-section different are, characterized in that the core (1) and yoke (2) forming U-shaped component consists of rolling iron of different thicknesses (Fig. 3). 2. Electromagnetic relay according to claim 1, characterized in that the core and yoke forming roll iron section can be punched out of a roll iron strip of different thickness before the U-shaped turning (F i g. 3). 3. Electromagnetic relay according to claim 2, characterized in that the later Separation of the components remaining webs (4) as locking lugs for holding a protective cap (11) of the relay. 4. Electromagnetic relay according to claim 1 or the following, characterized in that the as a yoke (2) serving end of the U-shaped component has an iron cross-section, the width of which corresponds to the external dimension of the excitation coil (3) that can be pushed onto the core. 5. Electromagnetic relay according to claim 1 or the following, characterized in that the End faces of the yoke (2) in conjunction with a longitudinal embossing (5 a) on the armature (5) Forms anchor bearing. 6. Electromagnetic relay according to claim 1, characterized in that the on the core (1) slide-on coil formers (3 α) of the excitation coil (3) is manufactured as a molded part. 7. Electromagnetic relay according to claim 6, characterized in that the coil body (3 a) has locking lugs which, after the excitation coil (3) has been pushed onto the core (1) snap into corresponding recesses in the yoke (2) and / or core (1). Documents considered: German Patent No. 522 079; German Auslegeschrift No. 1113 753; French patent specification No. 1108 457. 1 sheet of drawings 809 627/1131 10.68 © Bundesdruckerei Berlin