EP0948013A2 - Electromagnetic switch with rocker - Google Patents

Abstract

The electromagnetic switch has a multi-part housing enclosing movable switch contacts and a magnetic drive with a movable magnetic armature (2) coupled to a switch wiper (5), for operation of the switch contacts. The switch wiper seating is provided by two abutting housing parts (10,20), with a U-shaped cross-section for insertion of the wiper perpendicular to the load direction of the loading force on the wiper upon opening and closure of the switch contacts.

Description

The invention relates to an electromagnetic switching device with in a multi-part Housing arranged movable switch contacts and a magnetic drive with an anchor, the movement of which by means of an actuating mechanism via a swiveling lever, such as a rocker switch, which in the Housing is rotatably mounted by means of two bearings for moving the switch contacts transferable between an open position and a closed position is and wherein the bearing seats receiving the rocker bearing are divided.

The switching movement of the switching contacts when opening and closing The occurring load forces must depend on the opening and closing movements from the armature-transmitting movement levers, in particular the rocker switch be caught in their swivel. From DE 34 43 556 C2 a bearing of a rotatable coupling rod for transmitting the Switching movement known in which the bearing seat in a housing part with in Cross-section viewed is U-shaped and the bearing seat closed with a lid that is screwed to the housing becomes. This ensures that the lever is pivoted, but it is the bearing seat regardless of the occurring from the camp Load forces or their direction arranged in the housing, as later is explained in more detail. This arrangement of the bearing seat according to DE 34 43 556 C2, it is not possible to include all that occur when opening or closing To transfer load forces from the bearing seat into the surrounding housing, rather, the resulting force effect is broken down into two parts, of which one part of the force is transferred into the adjacent housing, the second However, force share on the screwed-on cover covering the bearing.

The invention has for its object an improved introduction of force as complete as possible of the forces occurring at the rocker pivot bearing only in the to enable immediately adjacent housings in order to ensure a flawless To ensure a permanent seat.

According to the invention, this object is achieved with a generic switching device solved in that a bearing seat part with a U-shaped cross section of a semicircle with two legs of different lengths is formed and the insertion axis for the rocker bearing at right angles in the U-shaped bearing seat part for the load direction of those occurring when opening and closing the switch contacts load forces acting on the rocker bearing is formed. According to the invention are the arrangement and the bearing axles of the bearing seat, the the rocker pivot bearing no longer independent of the occurring Load or their load direction arranged in the housing. Rather, the camp seat with its bearing axis and the load forces in the adjacent housing introductory areas so that the load direction is perpendicular or essentially at right angles to the insertion axis of the rocker bearing receiving bearing seat runs. This enables the occurring during the switch-on and switch-off movement by the rocker Forces that are transferred to the rocker bearing directly into one of the housing surrounding the bearing seat can be initiated.

For easier understanding of the invention, the load forces are described below and their inclusion by the camp with reference to FIG. 4, which a known pivot bearing for a rocker according to DE 34 43 556 C2 shows, and with reference 5 in an embodiment according to the invention. The known Bearing seat is divided and in a housing part G1 according to FIG. 4 and the second End cover G2, which is attached to G1 by means of screws. Here, the bearing seat LS1 is U-shaped in the housing part G1 Semicircle and two legs of equal length and symmetrical to its insertion axis Y. The switching axis and movement axis of the switching contacts for opening and closing is denoted by X and perpendicular to the insertion axis Y of bearing seat LS1. The operating lever or the rocker switch, which are stored in the bearing LS1, however, do not lead to a linear movement in the switching axis X, but a slight swivel movement, see above that the load forces transmitted by you in the axis W, at an angle α inclined to the switching axis X and corresponding to this load axis W must be taken up by the bearing LS1. The load forces for one and off are labeled F-On and F-Off. As from the illustration Fig. 4 can be seen, the load forces when switching off F-Aus completely be introduced into the adjacent housing G1 via the bearing seat LS1. The In contrast, load forces F-On when switching on cannot go directly into the are not initiated at their point of attack, but are divided into the two components X and Y, so that only a part of these Load forces can be introduced into the housing G1, another share however acts on the housing G2 and thus the tension and that Bearing loaded. For the embodiment according to the invention, the balance of power shown in Fig. 5. The bearing seat is again divided and with its U-shaped Area housed in the housing 20, while the second the Concluding bearing seat part formed by the adjacent housing 10 is and also has a storage trough. The U-shaped bearing seat part is included a semicircle and two legs S1, S2, which are of different lengths, formed. The switching axis X of the contacts is also shown, it is preferred parallel to the parting line t between the two adjacent housing parts, which also accommodate the shared bearing seat. Due to the The inventive design of the bearing seat is the insertion axis Y 'in the U-shaped bearing seat part for receiving the rocker bearing Shift paddle no longer identical to the vertical axis Y, the vertical to the switching axis X is. The load axis of the opening and closing movement of the switch contacts to be transferred to the rocker bearing and the bearing seat Load forces F are again designated W. It is around the angle α inclined to the switching axis X, as also shown in FIG. 4. According to the invention however, the insertion axis Y 'is now perpendicular to the load axis W, i.e. from the vertical axis Y or the switching axis X by the angle α deflected. This ensures that the load forces both when switching on F-On as well as when switching off F-Off directly into the adjacent housing 20, and essentially completely, can be introduced. The resulting load forces F-On and F-Off thus act directly on the housing accommodating the rocker bearing WL. The training according to the invention of the U-shaped bearing seat part that receives the rocker bearing in each case the direct introduction of the load forces into the respective Attack points on the bearing seat part housing. The force share of the now still on the parting line on the second bearing seat part or the subsequent one Housing is transferable, is very small and goes to zero. This depends on the tolerances.

Advantageous embodiments of the storage and bearing design according to the invention the rocker switch are the characteristic features of the dependent claims removable.

An advantageous embodiment of the split bearing seat according to the invention provides that the two bearing seat parts on two abutting housing parts are formed running over the parting line. So it's not an additional one Component more necessary to use the bearing seat in a split bearing to close a separate lid. The two bearing seat parts, the According to the invention on both sides of the parting line in the adjacent housing parts are formed when the two housing parts are screwed together connected.

In a further embodiment of the invention it is proposed that the U-shaped Bearing seat part housing part on which the switch contacts and rail support housing containing switch rooms and connections is. The second bearing seat is on the rail support housing adjoining the anchor with the anchor receptacle as an anchor housing designated housing part formed.

Both bearing seat parts have a bearing surface, whereby due to the unequal Division of the bearing seat the one bearing seat part, namely the U-shaped one has a larger storage area and accommodates the rocker bearing while the second bearing seat part only a small storage trough for support and closure the insertion opening in the larger bearing seat part for the rocker bearing forms.

The parting line between the housing parts having the bearing seats is preferred aligned parallel to the switching movement axis of the switching contacts. In this way it becomes easier to insert the insertion axis Y ' of the U-shaped bearing seat part with respect to the parting line, where this insertion axis Y 'then runs obliquely to the parting line, which also the legs of the U-shaped which are of unequal length with respect to the insertion axis Y ' Bearing seat part are formed. The inclination or the angle α, under which the insertion axis Y 'is inclined with respect to the vertical results from the arrangement and movement of the rocker switch when switching on and off of the switch contacts.

The two bearing seat parts for the rocker bearing on the inside are preferred the housing wall is formed from the rail support housing or anchor housing, so that the rocker switch with its rocker bearing in the U-shaped recess is easy to use on the rail support and then during assembly the two housing parts and screwing them together the bearing seat is closed.

The second bearing seat part forming the closure for the U-shaped bearing seat part, which is formed on the armature housing, has a support surface in shape of a circular arc section. This support surface is preferably on one Side transferred into a support cam, which is adjacent to the other bearing seat part engages the longer U-leg. The other side of the support surface is preferably designed to run parallel to the parting line.

The rocker switch according to the invention can be factory-made without additional fastening means be inserted into the rail support housing and needs not to be backed up separately. The rocker switch is on their bearings Grooved ball bearings provided and is with these in the U-shaped bearing seat part used and can occur during switchgear operation Introduce load forces directly into the adjacent rail support housing. In the switch position on and in the switch position off the adjacent takes Housing part, the armature housing, only small amounts of force. Thereby a separate bearing attachment, i.e. Attachment of the second bearing seat part separately by means of screws, since the bearing seat parts over the anyway existing fastening screws between the rail support housing and anchor housing can be braced with. When switching contacts are exchanged or vacuum interrupters can include the rail support housing used rocker switch can be handled separately without an additional rocker protection would have to take place.

Fig. 1:

einen Querschnitt durch ein Vakuumschaltgerät

Fig. 2a, b:

zwei perspektivische Ansichten der Schaltwippe gemäß Fig. 1

Fig. 3:

eine perspektivische Ansicht der Schaltwippe mit Vakuumschaltröhren

Fig. 4:

die Kräfteverhältnisse des Lagersitzes gemäß Stand der Technik

Fig. 5:

die Kräfteverteilung bei dem Lagersitz gemäß der Erfindung

Fig. 6a, b:

zwei perspektivische Ansichten des Schienenträgergehäuses mit U-förmigem Lagersitzteil

Fig. 6c:

den Schnitt DD nach Fig. 6a

Fig. 7a:

eine perspektivische Ansicht des Ankergehäuses mit Abschlußlagersitzteil

Fig. 7b:

den Schnitt EE nach Fig. 7a.

The invention is explained below with reference to the drawing. Show it

Fig. 1:

a cross section through a vacuum switching device

2a, b:

two perspective views of the rocker switch according to FIG. 1

Fig. 3:

a perspective view of the rocker switch with vacuum interrupters

Fig. 4:

the force relationships of the bearing seat according to the prior art

Fig. 5:

the distribution of forces in the bearing seat according to the invention

6a, b:

two perspective views of the rail support housing with a U-shaped bearing seat part

Fig. 6c:

the section DD of Fig. 6a

Fig. 7a:

a perspective view of the anchor housing with end bearing seat part

Fig. 7b:

the section EE of Fig. 7a.

The invention can be used in switching devices with a rocker switch, also with vacuum switching devices in general with rocker switch and at Protect with vacuum interrupters.

1 shows a vacuum switching device 1 as an application example, with a magnetic drive M with a movable armature 2, which is in an armature holder 3 is fixed and the anchor receptacle 3 by means of bolts 4 on one End region of the rocker switch 5 is attached. The anchor with anchor holder is in the anchor housing 10 housed. On the armature housing 10 that is Rail support housing 20 placed and screwed to it. By doing Rail support housing 20, the vacuum interrupters 6 are housed, wherein the fixed contact carrier 62 carrying the fixed contact 61 with the terminal lug 21 is attached to the rail support housing 2 and the movable Contact-carrying movable contact carrier 63 with a lifting rod 7 is firmly connected at its other end in an axle guide bearing 11 is mounted, which in turn is connected to the rail support housing 20. A strand 14 leads from the connections 22 to the movable contact carrier 63 and the lifting rod 7. The switching movement of the armature 2, arrow direction P, is connected to the rocker switch 5 connected to the armature holder movable contact carrier 63 transmitted, for which purpose the rocker switch on her the other end to a contact spring arranged coaxially to the lifting rod 7 8 acts with their fork ends 51. The rocker switch 5 is in a rocker bearing WL, whose fulcrum is shown in Fig. 1, stored, so that the movement P of the switch armature 2 in a pivoting movement, see arrow PS, for switching on and off the switching contacts of the vacuum tube is transferable to the lifting rod 7. The linear switching movement axis of the Switch contacts, which is determined by the axis of the lifting rod, is marked with X. The parting line between the rail support housing 20 and the Armature housing 10 is denoted by t. It runs preferably parallel to Switching movement axis X of the switch contacts. The actuation attack of the Switch rocker on the contact pressure spring 8 takes place in the area 9 and is due to the Swivel movement not parallel and linear to switching movement X. Correspondingly are the load forces acting on the rocker bearing in their load direction not parallel to the switching movement axis X, as shown in FIG. 3. Those acting on the rocker switch when switched on and off Load forces F-Aus and F-Ein are corresponding to the swivel movement the seesaw, see arrow direction PS, on the seesaw bearing, from here the two pins on the rocker switch 5 are drawn in the load direction W transferred and then in this load direction W from the seesaw over the Bearing seat introduced into the surrounding housing. The rocker switch according to Fig. 3, see FIGS. 2a, 2b, has actuating pins 51a, 51b for actuating Auxiliary switches in the area of the anchor receptacle by means of the pins 50a, 50b trained pivot bearing along its axis, the rocker bearing WL forms. A two-part bearing seat (210, 211; 102, 103), one of the bearing seat parts 210, 211 for receiving of the rocker bearing on the side of the rail support housing adjacent to the parting line 20, see Fig. 6a, 6b and 6c, is formed on the inside and its second part 102, 103 near the top of the parting line of the anchor housing is formed on the inside.

When joining the rail support housing and anchor housing the split bearing seat closed. As from the views of the rail support housing 6a and 6b and 6c, the larger bearing seat shell 210 or 211 following the parting line t, i.e. the lower edge of the rail support housing 20 molded on the inside of the housing trough-shaped with an insertion opening facing the parting line. The bearing seat part is U-shaped formed with a semicircle and two legs of different lengths S1, S2, so that the bearing axis Y ', which also forms the insertion axis in the direction of the arrow to insert the rocker bearing at an angle to the parting line t runs for example at an angle α of 35 °. The center of the The insertion opening is opposite the center of the bearing surface Considered semicircle offset in the vertical. The bearing pin of the rocker switch is by means of a deep groove ball bearing, which is not shown, in the Bearing seat part 210 or 211 used. The two legs S1, S2 of the bearing seat part 210 are slightly tapered outwards to make it easier To allow insertion of the rocker bearing. The load axis W der Load forces during operation of the switching device now run essentially vertically to the insertion axis Y 'and the bearing seat part, whereby the direct Introduction of the load forces into the surrounding rail support housing in the area of the load seat part 210 is ensured, see FIG. 5.

The rail support housing 20 according to FIGS. 6a and 6b points accordingly the three vacuum interrupters to be accommodated, switch rooms 203 and receiving openings 202 for the storage of fixed contact carriers and recesses 201 for the storage of the axle guide bearings of the lifting rods to each other opposite sides. On the transverse to this Sidewalls of the rail support housing 20 are according to the configuration the rocker switch, the two bearing seat parts 210, 211 with angled insertion molded.

The second seat bearing part 102 or 103 that completes the bearing seat is like 7a and 7b, on the one adjacent to the rail support housing Top of the armature housing 10 formed on the inner wall. The second bearing seat part has a bearing surface in the form of a circular arc section a on one side into a protruding cam b merges and on the other side parallel to the division joint t and the upper edge of the armature housing 10 runs out. When closing the two housing parts protrudes the cam b adjacent to the longer leg S1 of the U-shaped Bearing seat part into this, so that the complete inclusion and good Seat and attachment of the rocker bearing and bearing seat when screwing the two housings 10, 20 by means of those provided in the corner areas Screw holes 206 and 104 respectively.

Claims (12)

Electromagnetic switching device with movable switching contacts arranged in a multi-part housing and a magnetic drive with an armature, the movement of which by means of an actuating mechanism via a pivotable lever, such as a rocker switch which is rotatably mounted in the housing by means of two bearings, for moving the switching contacts between an open position and a closed position is transferable and the bearing seats receiving the rocker bearing are divided, characterized in that a bearing seat part with a U-shaped cross section is formed by a semicircle with two legs of different lengths (S1, S2) and the insertion axis (Y ') for the Rocker bearing is formed in the U-shaped bearing seat part (210, 211) at right angles to the load direction (W) of the load forces acting on the rocker bearing when the switch contacts open and close. Switching device according to claim 1, characterized in that the split bearing seat is formed on two abutting housing parts (10, 20) extending over their parting line (t). Switching device according to claim 1 or 2, characterized in that the two bearing seat parts (210, 211; 102, 103) formed on both sides of the parting line (t) are connected to one another by screwing the two housing parts (20, 10). Switching device according to one of Claims 1 to 3, characterized in that the load forces occurring on the switching rocker (5) when the switching contacts open and close are introduced from the rocker bearing into the housing part (20) having the U-shaped bearing seat parts (210, 211) . Switching device according to one of claims 1 to 4, characterized in that the housing part (20) having the U-shaped bearing seat parts (210, 211) is formed on the rail support housing (20) containing the switching contacts with switching spaces and connections. Switching device according to one of Claims 1 to 5, characterized in that the second bearing seat part (102, 103) is formed on the housing part which is referred to as the armature housing (10) and which accommodates the armature (2) with armature receptacle (3) adjacent to the rail support housing (20) . Switching device according to one of claims 1 to 6, characterized in that the parting line (t) between the housing parts (10, 20) receiving the bearing seat parts runs parallel to the switching movement axis (X) of the switching contacts in the rail support housing (20). Switching device according to one of claims 1 to 7, characterized in that the insertion axis (Y ') of the U-shaped bearing seat part (210, 211) to the joint (t) and the switching movement axes (X) of the switching contacts between the rail carrier housing (20) and Anchor housing (10) runs obliquely and is inclined at an angle α from the vertical axis (Y) to the parting line (t). Switching device according to one of claims 1 to 8, characterized in that the two bearing seat parts (210, 211; 102, 103) are integrally formed on the inside of the housing walls of the rail support housing (20) or armature housing (10). Switching device according to one of claims 1 to 9, characterized in that the bearing seat part (102, 103) forming the closure for the U-shaped bearing seat part (210, 211) has a support surface (a) formed by an arcuate section. Switching device according to claim 10, characterized in that the support surface (a) ends on one side in a support cam (b) which engages in the bearing seat part (210, 211) adjacent to the longer U-leg (S1). Switching device according to one of claims 10 or 11, characterized in that the support surface (a) on the side facing away from the cam runs parallel to the parting line (t).

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