EP0948016B1 - Electromagnetic switching device having a multi-part housing - Google Patents

Description

The invention relates to an electromagnetic switching device, in particular Contactor, with a contact space for the moving contacts and fixed contacts and with a drive space for the magnetic drive with magnetic core, Coil and armature for actuating the contacts, which are in a multipart Housing are housed.

Electromagnetic switching devices of the generic type are, for example from US Pat. No. 3,835,425 or DE 42 44 606 C2. Because electromagnetic Switching devices for switching currents in the load range in different Sizes are created according to requirements, it is desirable to have a Build a series as similar as possible and as few and as possible Use simple parts for any size and possibly Also a number of identical components in different sizes use. Furthermore, it is desirable that the electromagnetic Switching device can be economically produced in automated production, and the individual parts functionally successively assembled to the contactor are in turn or preassembled parts are used in the housing.

The object of the invention is therefore different electromagnetic switching devices Size of a series with as few and simple Parts and many common parts produce and at the same time the simplest possible to allow economic assembly. Here are also manufacturing tolerances be kept as low as possible and costly adjustments be avoided.

This object is achieved in a generic electromagnetic Switching device according to the features of the characterizing part of claim 1 solved.

According to the invention, the housing comprising the drive space is composed of two a magnetic core housing and an armature housing forming frame-like Housing parts assembled with upwardly and downwardly open receiving spaces and the open bottom of the magnetic core housing by means of a closed bottom plate of the magnetic core housing used. According to the invention, the housing is in a magnetic core housing and a Anchor housing divided. Both housing parts are screwed together connected. The bottom of the magnetic core housing is open and will from the bottom plate containing the electronics in the form of a printed circuit board, closed and covered. With the invention, a simple structure of Housing parts and the tools with which the housing parts are manufactured, reached. The base plate for the switching device can be used as a common part over all Sizes of a series can be used. Furthermore, it is possible to Printed circuit board with the electronics without complete device dismantling at one Switching device to replace, as this from the bottom of the housing forth by replacing the bottom plate is interchangeable.

Advantageous developments of the switching device according to the invention are the characterizing features of the dependent claims.

For the attachment of the magnetic core is proposed in the way that in the Magnetic core housing from the top of the equipped with two axes Magnetic core in the magnet core housing formed on the inside pockets can be used as a support trained axle ends. Furthermore, will According to the anchor housing inside with the pockets of the Magnetic core housing corresponding molded abutment surfaces formed so that when screwed together magnetic core housing and Anchor housing the abutment surfaces in the pockets of the magnetic core housing engage and press on the supports of the magnetic core. Prefers become the supports of the magnetic core between two elastic damping plates embedded, which are loosely applied, so that when passing through each other Screw connected magnetic core housing and anchor housing these have a bias.

The receiving pockets for the supports of the magnetic core are preferably pot-like provided on the inside in the region of the corners of the magnetic core housing and have on their pointing to the magnetic core side after open top slot for receiving the axes of the magnetic core.

A further advantageous embodiment, the magnetic core housing and learn the anchor housing for easy installation and storage of the bobbin. For this purpose, the invention proposes that the magnetic core housing on the inside facing upward Auflagerstege side of the magnetic core for has the placement of the bobbin and that on the magnetic core housing attached anchor housing inside with as an attachment for the bobbin serving projections is formed such that the bobbin between the bearing webs of the magnetic core housing and the projections the anchor housing is set with sufficient clearance, so that the bobbin itself is not stressed by pressure. By the Screwed anchor housing and magnetic core housing predetermined Distance between the bearing webs and the projections between which the bobbin is stored, the remaining game can be adjusted and kept small, it being ensured that the bobbin itself never subjected to pressure and wear on the bearing surfaces is minimized by movement of the bobbin. In addition, are on this way, no additional fasteners required for the bobbin.

In a further development of the housing construction according to the invention, it is proposed that at least one guide insert on the inner wall of the Anchor housing and / or the magnetic core housing can be fastened. The inventive Guide insert can be the dividing joint between magnetic core housing and anchor housing in the assembled and bolted state be formed across. The leadership use forms at the same time in his armature housing extending part of a guide receptacle for other moving parts, such as one carrying the movable contacts Bridge. According to the invention, the guide inserts provide separate parts dar preferred by means of dovetail connections on the armature housing can be attached by insertion. Due to the separate training of leadership use it is possible to use suitable materials for the guides good sliding properties and abrasion use, however, for the housing Use materials with properties optimized for strength. The Guide inserts are for switchgear of a series of different sizes Equal parts.

A preferred embodiment of the switching device provides that at two each other opposite sides of the armature housing per a guide insert by means a dovetail connection is attachable. For the constructive design the guides is further proposed that the armature housing on two opposite sides inside one after bottom open pocket-like groove with an upper middle guide part and formed from top to bottom extending dovetail guide, in the leadership of the use of trained from below with a leadership use dovetail-shaped engagement groove can be inserted. The leadership assignment can be designed so that it in the inserted state the underside of the anchor housing sufficient projection for a Has engagement in the magnetic core housing for a guide system.

Electromagnetic switching devices also require external connections, like coil connections and a corresponding adjustment of the connections in each case to the existing conditions on site. In particular, too adapt the connections to different sizes of the switching device. To use a single component for these connections, Connection modules are proposed for the outer connections of the Device. In an inventive development of the switching device is proposed that connection modules are provided, and the magnetic core housing for receiving the connection modules at two opposite Pages near the corner area on its top parallel to the sides has extending insertion grooves having their insertion on the inside, such that with T-shaped or the like latched Einstecksteg trained connection modules can be inserted into the insertion grooves.

The simplified construction with regard to the connections is also achieved by that the connection modules are constructed the same among each other and in particular three connection modules and a fourth so-called dummy module, the in its outer shape is the connection module, are provided. For the attachment and a tight fit of the connection modules is according to the invention proposed that the armature housing at two opposite Outside a total of four guide projections has to precisely inserted between four inserted on the magnetic core housing Connection modules or dummy modules when connecting the armature housing with the magnetic core housing, whereby the connection modules or Empty modules are prevented from falling out.

It is also possible to fix the connection modules to the guide projections provide the anchor housing lateral latching hook, in which the Engage connection modules when inserting the armature housing. For the attachment the connection modules are not loose parts, such as screws or the like, required. The mounting principle applies to all sizes and it can the connection modules with appropriate equipment in the same way for the different sizes are used.

In addition, the invention provides that the together connecting and precisely fitting aufeinanderzusetzenden housing parts, such as Base plate and PCB with coding fits, such as cams and Holes are equipped or that the magnetic core housing and the armature housing for a precise assembly in the area of the dividing joint have at least one Kodierpassung in the form of a nose-groove fit.

The drive space according to the invention comprising magnetic core housing and anchor housing composite housing is final completed by the insertable from the top in the anchor housing anchor. Here, the anchor is preferably on an anchor dome housing attached underneath, so that the Ankerdomaufnahmegehäuse in corresponding Paßlagernuten the armature housing in the desired position can be used.

According to the invention, the fastening screws, which anchor housing and magnetic core housing, in the anchor housing in side flanges housed in recessed countersinks with their screw heads. These depressions can also be used as a receptacle for a boom of a motor protection relay serve. This has the advantage that no additional recording for a Fixing a boom on the housing is required, and no opening of the housing is required.

Figur 1:

eine perspektivische Darstellung des den Antriebsraum aufnehmenden erfindungsgemäß gestalteten Gehäusebereiches;

Figur 2:

eine Explosionsdarstellung der den Antriebsraum des elektromagnetischen Schaltgerätes bildenden Teile;

Figur 3:

eine Explosionsdarstellung des Magnetkerngehäuses mit Magnetkern;

Figur 4:

eine Explosionsdarstellung des Magnetkerngehäuses und des Ankergehäuses mit Führungseinsätzen;

Figur 5:

eine Explosionsdarstellung des Magnetkerngehäuses und des Ankergehäuses mit Anschlußmodulen;

Figur 6:

eine Aufsicht auf das Magnetkerngehäuse und Ankergehäuse mit eingesetztem Spulenkörper;

Figur 7:

ein Dämpfungselement;

Figur 8:

ein Auflager für den Magnetkern;

Figur 9:

den Führungseinsatz gemäß Fig. 4;

Figur 10:

eine Explosionsdarstellung von Ankergehäuse und Spulenkörper;

Figur 11:

eine Explosionsdarstellung von Bodenplatte und Leiterplatte.

The invention will be explained in more detail with reference to the drawing of an embodiment. Show it

FIG. 1:

a perspective view of the drive space receiving invention designed housing area;

FIG. 2:

an exploded view of the drive space of the electromagnetic switching device forming parts;

FIG. 3:

an exploded view of the magnetic core housing with magnetic core;

FIG. 4:

an exploded view of the magnetic core housing and the armature housing with guide inserts;

FIG. 5:

an exploded view of the magnetic core housing and the armature housing with connection modules;

FIG. 6:

a plan view of the magnetic core housing and anchor housing with inserted bobbin;

FIG. 7:

a damping element;

FIG. 8:

a support for the magnetic core;

FIG. 9:

the guide insert according to FIG. 4;

FIG. 10:

an exploded view of armature housing and bobbin;

FIG. 11:

an exploded view of bottom plate and circuit board.

The object of the invention is concerned with the structural design of the drive space comprehensive housing portion 100 of FIG. 1st The housing 100 is in the magnetic core housing 10 and the armature housing 20 shared. Both housings are screwed together. The bottom of the Magnetic core housing is open, herein a printed circuit board is used and covered to the outside with the bottom plate 30 as a conclusion. Are side above the magnetic core housing 10 to the armature housing 20 fitting the Connection modules 4 and a dummy module 4a attached.

2, the structure of the inventively designed area of the Drive compartment for an electromagnetic switching device in exploded view shown. The magnetic core housing 10 is like a frame with a up and down open receiving space A1 formed. Into the magnetic core case 10 is used from below the circuit board 3 in the direction of arrow P1 and down with the applied in the direction of arrow P1 bottom plate 30 after covered outside. The bottom plate is made by means not shown screws through the screw holes 301, see Figs. 1 and 11, on the magnetic core case 10 attached. The circuit board 3, see Fig. 11, has a trough-like Plastic construction incorporating the board containing the electronics is poured. At the bottom plate 30, support domes 302 are formed, with which the bottom plate in corresponding fitting holes 3d of the circuit board 3rd fits. By inserting the circuit board 3 and the bottom plate 30 according to 2, the magnetic core housing 10 is closed on the underside. Into the magnetic core case 10 is inserted in the direction of arrow P2 from above the magnetic core. The magnetic core 2, see Fig. 3, has two axes 221, 222, at the four Ends a support 5 made of plastic, see Fig. 8, is attached. each Plastic bearing 5 is the top and bottom with a damping plate. 6 For example, covered by rubber, which the blows of the electromagnet dampen. The longitudinal axis of the magnetic core 2 is designated by X. The axes extend transversely thereto. The magnetic core case 10, see Fig. 2, is hollow as an open frame with two opposite formed side walls 103, 104, which are open at the bottom and in which electronic components of the circuit board of FIG. 2 in the direction of arrow P1 are insertable. The two connecting the hollow side walls 103, 104 Longitudinal sides 101, 102 of the magnetic core housing are opposite to the side walls 103, 102 reset so that here each corner areas with mounting options, like insertion grooves 114 or holes 114a are.

On the inside of the side walls 102, 103 are in the corner areas cup-shaped pockets 106 are formed, which are open at the top and the recording serve the support 5, 6 of the magnetic core. The bags indicate their facing the inside of the receiving space A1 and the magnetic core 2 Side up open bearing slots 107 for the insertion of the axes 221, 222 of the magnetic core.

The magnetic core housing 10, see Fig. 3, is to the longitudinal extent of the axis X of the magnetic core 2 also formed symmetrically. On the top the side walls 103, 104 equipped with hollow chambers are support domes with screw hole for mounting the armature housing and screwing the same formed with the magnetic core housing 10. At the top of the Side walls 101, 102 are formed in the corner areas insertion slots 110, which are closed to the outer walls and where the possibility of insertion from the inside parallel to the side walls. These insertion slots are used to insert the connection modules 4 and Empty module 4a, see Fig. 2 and 5. Also at the top of the long sides 101, 102 of the magnetic core housing each have a fitting groove 116 as a coding to the exact fit insertion of the armature housing, with a corresponding Coding projection 218 is formed, see also Fig. 5, formed. For the storage of the bobbin, the magnetic core housing 10 according to Fig. 3 on the inside adjacent to the receiving space A1 for the magnetic core Support webs 111, 112, on which the bobbin 8 can be placed.

Furthermore, between the receiving pockets 106 for the bearings of the Magnet core 2 inside the side walls 101, 102 depending on a retaining cam 115th for placing a coil spring as an impression spring 7a between the magnetic core housing and anchor dome receptacle 90 integrally formed, see also Fig. 2. Between the receiving pockets 106 and the retaining cam 115 for the impression spring 7a are on the inside adjacent to the side walls 101, 102nd of the magnetic core housing 10 receiving spaces 108 for the insertable from below provided high electronic components. These recording areas 108 may be closed on the top side. As shown in FIG. 2, the Magnet core 2 inserted into the magnetic core housing 10 and then the bobbin 8 in the magnetic core housing 10 on the support webs 111, 112 placed. The armature housing 20 with the receiving space A2 is on the Magnetic core housing 10 mounted and screwed on the side. The anchor housing 20 is shown in more detail in FIG. 10. Also, the armature housing 20 is frame-like up and down open and also symmetrical to the longitudinal axis X of the magnetic core 2 is formed. At two each other opposite side walls 203, 204 are outside side flanges 206 with holes 207 for attaching the armature housing to the magnetic core housing educated. At the other two opposite each other Side walls 201, 202 are stiffening projections 211 on the outside molded, the upper side laterally downwardly projecting locking hooks 213, and the lower side of the Kodiemocken 218 is formed. The side walls 201, 202 and the stiffening projections 211 each have a central receiving groove 208 and 212 for the use and management of the armature 9 with Ankerdomaufnahmegehäuse 90, see Fig. 2, on. On top of the anchor housing 20 are in the side walls 203, 204 also fitting grooves 219 for Connection housing provided, as well as snap hook 205th For the determination of the bobbin, the armature housing 20 is inside with of the side walls 203, 204 protruding projections 209 with contact surfaces 209 a formed at which the edge of the bobbin 8 comes to rest.

In Fig. 6 is shown schematically how the in the magnetic core housing 10th on the magnets, not shown, coil body 8 by placing the armature housing 20 on the magnetic core housing 10 through the projections 208 is held. The bobbin 8 is between the projections 209 of the armature housing 20 and the support webs 111, 112 of the magnetic core housing held with sufficient play, so that the bobbin even in the bolted state of the housing parts not stressed to pressure becomes.

The bobbin 8 is also shown in Fig. 10. He is of two equal Coils made by assembling and latching the same and has pins on one or both opposite narrow sides 83 on. To the pins 83 leads on one side in the region of the coil edge an open guide channel 84 for the coil wire.

Furthermore, the armature housing 20 serves to receive the guide inserts 7, see Figs. 2 and 4. For this purpose, the armature housing 20, see Fig. 10, inside formed from the bottom 217 ago with a groove-shaped bag 214, which has a central guide part 215. Center is in the bag in Longitudinal extension of a dovetail guide 216 is formed. The leadership assignment 7, see Fig. 9, has lateral webs 71, 70 which are upwards projecting over the middle part 74, forming a receiving region 72. At the middle part is on one side in the longitudinal axis Y, the dovetail-shaped Engaging groove 73 is formed, with the guide insert 7 in the dovetail guide 216 in the pocket 214 of the anchor housing 20 from the bottom is inserted. On the dovetailed Engagement groove 73 having opposite side of the Guide insert 7 as shown in FIG. 9, the side bars 71 are slightly before and Together with the middle part form an engagement area that extends over the Whole length of the guide insert can extend.

In Fig. 4 it can be seen how the guide insert 7 from the bottom is inserted into the anchor housing 20 in the pockets 214 and to the inside, i.e. to the receiving space A2, in addition to a receiving area 72 in Shape of a groove through the side bars 71, 70 forms. Furthermore, as Einschubbegrenzung for the guide insert 7 two support webs 117 of the inside of the side walls 101, 102 of the magnetic core housing 10 outgoing educated. The leadership inserts serve to guide moving Parts that protrude from the top into the anchor housing.

The connection modules 4, see FIG. 2 and FIG. 5, are in the insertion slots 110 inserted on top of the magnetic core housing. Subsequently the armature housing 20 is in the direction of arrow P2 on the magnetic core housing 10th deferred, wherein the armature housing with the stiffening protrusions 211 each between two connection modules 4 or connection module and dummy module 4a engages and sets them in position. To effect a fastening the guide members 213 of the armature housing 20, in the corresponding Intervene grooves on the adjacent sides of the connection modules 4. After this Place the armature housing on that equipped with the connection modules Magnetkerngehäuse and after previously the magnetic core, the bobbin, the guide inserts and pressure springs have been used, this is done Screwing the armature housing 20 with the magnetic core housing 10 by means Screws S, see Fig. 6. The drive compartment comprehensive housing area 100 of the electromagnetic switching device of FIG. 1 is then the Further final assembly and construction of the contact space and other equipment parts fed. With assembled and bolted anchor housing and magnetic core housing pushes the attached anchor housing with the four bearing surfaces 210, see Fig. 10, in the corner areas below are mounted on the mounted in the pockets 106 of the magnetic core housing and with damping elements covered plastic bearings whose Magnet core and holds it firmly. In this case, the damping plates 6 are compressed, so they have a bias in the installed state.

Claims (15)

1. Electromagnetic switching device, in particular contactor, having a contact area for the movable contacts and fixed contacts and having a drive area for the magnetic drive having a magnet core (2), a coil and an armature (9) for the purpose of actuating the contacts which are accommodated in a multi-part housing, the housing (100) which encloses the drive area being composed of two frame-like housing parts, which form a magnet core housing (10) and an armature housing (20), having an accommodating area (A1, A2) which is open at the top and at the bottom, and the open base of the magnet core housing (10) being closed by means of a base plate (30) inserted on the underside of the magnet core housing, characterized in that pockets (106) are provided which are formed on the inside of the magnet core housing (10), and the magnet core (2), which is equipped with two shafts (221, 222), is inserted into the magnet core housing (10) from the upper side with the ends of the shafts, in the form of supports (5), inserted into the pockets (106), and the armature housing (20) has, on the inside, opposing bearing surfaces (210), which are integrally formed and correspond to the pockets (106) of the magnet core housing (10), such that, when the magnet core housing (10) and the armature housing (20) are screwed to one another, the opposing bearing surfaces (210) of the armature housing (20) engage in the pockets (106) of the magnet core housing (10) and press onto the supports (5) of the magnet core (2).
2. Switching device according to Claim 1, characterized in that support webs (111, 112) are formed on the inside of the magnet core housing (10) to the side of the magnet core for the purpose of positioning the coil former on them, and the armature housing (20), which is positioned on the magnet core housing (10), is formed on the inside with projections (209) acting as a bearing for the coil former (8), and the coil former (8) is fixed between the support webs (111, 112) of the magnet core housing (10) and the projections (209) of the armature housing (20) with sufficient play, such that the coil former (8) itself is not subjected to pressure.
3. Switching device according to Claim 1, characterized in that the supports (5) of the magnet core (2) are embedded between two elastic damping plates (6) such that, when the magnet core housing (10) and the armature housing (20) are connected to one another by means of screws, they have a prestress.
4. Switching device according to Claim 3, characterized in that the supports (5) of the magnet core (2) are produced from a plastic, and the damping plates (6) are produced from rubber.
5. Switching device according to Claim 1, characterized in that the printed circuit board (3) has a trough-like structure having a board cast in plastic.
6. Switching device according to Claim 1, characterized in that at least one guide insert (7) can be fixed to the inner wall of the armature housing (20) and/or magnet core housing (10).
7. Switching device according to Claim 6, characterized in that the guide insert (7) is formed in its upper region, which is located in the armature housing (20), with a guide holder (72) for movable parts, such as a link.
8. Switching device according to Claim 5 or 6, characterized in that in each case one guide insert (7) can be attached to mutually opposing sides of the armature housing (20) or magnet core housing (10) by means of a dove-tailed connection.
9. Switching device according to one of Claims 5 to 7, characterized in that a pocket-like groove (214), which is open at the bottom, having an upper, central guide part (215) and a dove-tailed guide (216) which extends from the top to the bottom is formed on the inside of the armature housing (20) on two mutually opposing sides, it being possible for the guide insert (7) to be pushed into said groove (214) from below with a dove-tailed engagement groove (73) which is formed on the guide insert (7).
10. Switching device according to Claim 1, characterized in that connection modules (4, 4a) are provided, and the magnet core housing (10) has insertion grooves (110) on its upper side and near the corner region on two mutually opposing sides for the purpose of accommodating the connection modules (4, 4a), said insertion grooves (110) extending parallel to the sides and having their insertion opening on the inside such that connection modules, which are formed with a T-shaped or similar insertion web (41) which can be latched behind, can be inserted into the insertion grooves.
11. Switching device according to Claim 10, characterized in that the armature housing (20) has in each case two module holders (211) on two mutually opposing outer sides (201, 202) for the purpose of being inserted such that they fit precisely between two connection modules (4, 4a) or module receptacles, which are inserted on the magnet core housing (10), when the armature housing (20) is connected to the magnet core housing (10), as a result of which the connection modules or module receptacles are prevented from falling out.
12. Switching device according to Claim 11, characterized in that the outer sides (201, 202) of the armature housing (20) have lateral guide projections which engage in the connection modules.
13. Switching device according to one of Claims 1 to 12, characterized in that the magnet core housing (10) and the armature housing (20) have at least one coded fit in the form of a tab/groove fit in the region of the separation joint such that they can be assembled so as to fit precisely.
14. Switching device according to one of Claims 1 to 13, characterized in that the armature (9), which is fixed to an armature dome accommodating housing (90), can be inserted into the accommodating area (A2) of the armature housing (20) from above.
15. Switching device according to Claim 1, characterized in that the pockets (106), which accommodate the supports (5) of the magnet core (2), are formed on the magnet core housing (10) in the form of pots and have, on the side which faces the magnet core, a bearing slot (107), which is open at the top, for the purpose of inserting the shafts of the magnet core (2).

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