EP0544243A2 - Base for functional unit - Google Patents

Abstract

A base (1) which is provided with mobile and mechanically loaded functional parts has a base body (3) which has the form of a continuously flat plate, on which supporting bodies (5 to 9), which are located on a mounting side (4), with connecting parts (17, 18) in the form of plates are mounted in the functionally correct position and closely adjacent, exclusively via bonded connections (10), such as fusion connections. This construction is suitable for numerous switching, control and regulating apparatuses, and enables simple manufacture, a low weight, a high strength, good accessibility and good functional reliability. <IMAGE>

Description

The invention relates to the z. B. load-bearing main body unit for mechanically, thermally or the like loaded functional units, such as those formed by switching devices for electrical heating devices. Such switching devices can be temperature limiters, signal switches, manually adjustable clocking power control devices or sensor-controlled temperature controllers, power or cam switches for several power levels and the like.

The base expediently has one or more base bodies which may be rigidly connected to one another, on which separate support bodies for electrical switching elements, thermally or manually controlled actuating elements, connecting elements for device lines and the like are electrically insulated from one another. Like. Can be attached. At least one support body is advantageously essentially rigidly connected to one or more base bodies in such a way that it is fixed relative to it with one or more bolts and / or by being directly in z. B. engages slot-shaped receptacles of the base body. The recordings or Through openings for the bolts, however, require a relatively complicated structure of the base body on the mounting side, which can lead to difficulties in particular if the base body is made of a ceramic material, such as steatite, because no particularly tight manufacturing tolerances can be maintained here. The recessed arrangement of the support body in the mounting side of the base body can make assembly as well as adjustment or ventilation more difficult, since the support body and the associated functional parts are hardly accessible after installation. The fastenings of the respective support body can also become loose due to the mechanical load changes that occur during long periods of use, which can impair proper function.

The invention is furthermore based on the object of creating a base of the type mentioned, in which disadvantages of known designs or the type described are avoided and which, in particular in the case of a simple construction, a very secure, durable and / or within the narrowest of tolerances precise fastening of at least one support body guaranteed.

To achieve this object, at least one support body or the like, in particular a support body exposed to mechanical loads that change due to the function of the functional unit or a movable functional part or thermal influences, is fastened via an adhesive connection, which is expediently up to at least 200 ° C. or over 300 ° or even 400 ° to 500 ° C is temperature-resistant or temperature-stable, so that the functional unit can also be used in devices in which the base, such as in the case of a cooking or oven heating, is exposed to high operating temperatures. The adhesive connection can be very space-saving be there z. B. on the side facing away from the adhesive side of the associated connecting part, no protruding components, such as bolt heads, are required and, in addition, all sections of the respective supporting body adjoining the connecting part can be completely free and easily accessible from most sides.

Another advantage of this solution is that the base body is free of pockets, depressions, openings or the like. Therefore, in principle, one and the same base body can optionally be used for completely different functional units by placing the necessary support bodies on the base accordingly will. The base body can therefore be designed as a plate or board that is continuously flat on one or both sides of the plate and / or can have continuous outer edges. As a result, the base body can be produced as a cut-off or cut-out of a larger plate which, after its outer edges have been cut free, no longer requires any further shaping processing. One and the same plate material can thus be used for base bodies of different sizes.

Instead of the base body made of several components such. B. sandwich that he in the area of the respective mounting surface and / or on the side facing away with an electrically insulating coating z. B. is provided on a metallic base or reinforcing body, the base body is advantageously made in one piece from such an insulating material over its thickness and / or its surface extent. This is advantageously a sintered, fired, pressed or otherwise compacted or consolidated and made temperature-stable material, which consists of a fiber-containing, particle-containing, flour-like or the like. Starting material, optionally with the addition of a binding agent, can be produced and has sufficient dimensional stability with respect to the thermal or mechanical loads that occur. The structure density of the base body in the surface area of the mounting surface is expediently denser than in the adjoining core area, which can have a certain porosity. Furthermore, the base body is resistant to bending, compression and tensile under the operating conditions or operating loads. The base body can have a plate thickness in the order of 1 to 3 or 5 mm, which is approximately in the order of the material thickness of the support body or only slightly above it, so that the base is extremely light. The respective support body simultaneously forms a very effective reinforcement, by means of which at least one of the stated strengths of the base body is increased so that it can be made weaker than without such reinforcements.

It is conceivable that the mounting surfaces of the base body in mutually transversely offset planes, for. B. to provide on both sides of the base of the base body and / or to produce the connecting parts of the support body from different or different thickness materials, but this results in a particularly simple design if all mounting surfaces or connecting surfaces, if necessary, on a single side of the plate in a common plane or optionally in a continuously slightly curved plane or if essentially all connecting parts or supporting bodies made of the same starting material, for. B. are made of sheet metal and therefore have the same thickness. The respective support body is thus easy to manufacture as a stamped and bent part from a metallic material.

In order to further increase the strength and to be able to easily bring the receptacles of the supporting bodies for the functional parts to an external distance from the mounting side of the base body, at least one supporting body is designed in cross section as a profile with profile sections lying in alternating directions. In particular, angle and U profiles are suitable for this purpose, although at least one profile that is closed over the circumference can also be provided, wherein a continuously flat profile section in each case expediently forms the associated connecting surface over its entire surface extension. If connection surfaces are provided in the longitudinal distance from one another and possibly only connected via an edge surface or not at all connected to one another, the strength or connection is further increased even under different thermal expansions of the materials used.

The base body can form a plate-shaped shielding of the electrically conductive functional part of the functional unit, so that none of these functional parts is accessible or exposed from the side facing away from the mounting side, possibly except for connecting elements for device lines. The Sokel body could also, for. B. as a perforated plate, be provided with uniformly distributed openings, which would allow an at least in all directions parallel to the mounting surface positive engagement of at least one support body, in particular in the region of the connecting surface. Such an engagement is also only possible in the area of at least one outer edge of the base body if the support body is provided with a corresponding engagement profile, which is expediently formed in one piece with the support body, namely its connecting part and / or its support part and adjoins this respective support part.

For example, a profile leg of a support body protruding transversely to the mounting surface can abut against an edge surface of the base body and thereby simplify alignment. A profile leg can also rest on the side of the base body facing away from the mounting side, so that the support body is positively secured against movements in both opposite directions transversely to the mounting surface with respect to the base body. Attacks at least one of these legs in a recess of the base body, for. B. a recess in the edge surface, there is also a positive locking in one or both opposite directions parallel to this edge surface, so that the support body relative to the base body has only a single degree of movement or plug-in freedom. By means of the legs mentioned, the base body can also be provided with an appropriate edge protection, for. B. against impact or breaking loads in the edge area.

Non-electrically conductive parts can also be attached to the base body in the manner described, for. B. a projecting over the outside of the functional unit flange plate for fastening the entire functional unit to a device and / or a temperature sensor or the outer tube of a rod-shaped expansion sensor, which forms a preassembled unit with the associated support body and is optionally attached by welding. Functional parts are to be arranged on a substantially continuously bare metallic on the mounting side of the base body exposed support body, such as. B. an adjusting member to be accessible from the outside, at least one such functional part can be mounted or attached to the support body with the interposition of an insulating body.

In a further embodiment of the invention, stapling means are provided to provisionally, for example, one to all of the supporting bodies before the final adhesive connection is made on the mounting side of the supporting body. B. as with a self-adhesive layer. This adhesive layer can be formed directly by a connection layer provided for the adhesive connection and / or a separate layer which, for. B. decomposed or dissolved at the completion of the final adhesive bond. The adhesive connection is expedient from the type that it is carried out by heating and / or pressure and subsequent cooling, the temperature of the heating, for. B. the melting temperature for generating the adhesive effect, can be above the maximum thermal load of the functional unit in the range of the above temperatures, in order to ensure a completely safe temperature resistance for the adhesive bond.

Instead of making the connection without using an additional connection layer by briefly converting the mounting surface of the base body into heat during the production of the connection by heating, a solder layer, a thin ceramic or glass layer or the like can be used as a separate connection layer is expediently first applied to the mounting surface by lamination or printing, after which the connection to the connecting surface of the respective support body is established. All connecting layers can be applied simultaneously or in a single operation and also all support bodies can be permanently adhered to the base body, e.g. B. by baking in the passage through a corresponding furnace chamber.

The connection layer is expediently continuous within the outer edges of the respective connection surface continuously and can also protrude slightly beyond these outer edges, where they can form fillet welds with the edge surfaces of the respective connecting part. The thickness of the connecting layer is expediently in the um range such that the connecting surface of the respective support body can also partially bear directly against the mounting surface of the base body or has only a gap distance from it which is of the order of magnitude mentioned. The material of the connecting layer is such that it can penetrate into the pores of the mounting surface as well as those of the connecting surface and can thereby be anchored practically inextricably. As a result, the mounting surface is also a precise reference surface for aligning the supporting bodies or functional parts transversely to the level of the mounting side with an accuracy in the range of 10th millimeters or below.

This is also possible in particular because each support body is essentially formed in one piece over its entire extent and, through its respective connecting surface or edge surfaces, forms stop surfaces which are prefabricated and are rigidly mutually rigid. The base body can also be essentially rigid in the sense that even the weakest bending deflections do not lead to elastic or permanent deformation, but rather to breakage. After reinforcement with the supporting bodies, however, the breaking strength of the base is often higher than the loads to be expected even under the most unfavorable circumstances during assembly, storage and operation.

The surface covered by mounting surfaces or connecting surfaces on the mounting side of the base can be approximately in the order of half of the associated total area or above, so that there is a relatively dense occupation of the mounting side with more or less evenly distributed connecting parts and the base body therefore has the structure and effect of a multilayer or laminated sandwich panel in the area of each connecting part. One to all connecting parts protrude by their plate or material thickness over the outermost front side of the base body formed by the mounting side. The dense occupation of the mounting side with connecting parts can, for. B. can also be achieved in that at least one connecting part of a further supporting body engages between two approximately parallel connecting parts or in the corner zone between two transverse or approximately perpendicular connecting parts of a supporting body and that most connecting parts extend approximately to the corresponding outer edges of the base plate .

The total size of the connection area or the connection area ^ C ^ S9 ^ @ ^ Q $!
E '' ^ C ^ Sragkörper expedient is approximately in the order of magnitude in the associated view largest surface area of the associated support member, the greatest extent parallel to the mounting surface is expediently several times larger than transverse to it.

Fig. 1

einen erfindungsgemäßen Sockel in perspektivischer Darstellung,

Fig. 2

einen Ausschnitt der Fig. 1 im Querschnitt und geringfügig abgewandelter Ausbildungen,

Fig. 3

einen weiteren Ausschnitt der Fig. 1 im Querschnitt und

Fig. 4

einen vergrößerten Querschnitt durch eine Verbindungsstelle.

These and other features emerge from the claims and the description and the drawings, the individual features being realized individually or in groups in the form of sub-combinations in one embodiment of the invention and in other fields, and advantageous and protectable designs can represent, for which protection is claimed here. Exemplary embodiments are shown in the drawings and are explained in more detail below. The drawings show:

Fig. 1

a base according to the invention in perspective view,

Fig. 2

1 shows a section of FIG. 1 in cross section and slightly modified training,

Fig. 3

a further section of FIG. 1 in cross section and

Fig. 4

an enlarged cross section through a connection point.

In the case shown, the base 1 serves as the entire base body of a functional unit 2, indicated essentially by dash-dotted additions, which has the base body and components which are mounted, guided, held or similarly movable and / or rigid in position. The base is composed of a single or a plurality of base bodies 3, which may lie at the same level next to one another with a gap spacing, and support bodies 5 to 9 located on its single mounting side 4 to form a preassembled structural unit. This assembly is resistant to high temperatures and then less temperature-resistant components or assemblies can be attached or attached to it in subsequent operations.

The base body 3 expediently consists of a pourable or flowable starting material, such as a stillage, which is baked or dried in a mold to the base body 3 under mechanical pressure and / or supply of exogenous heat and then forms a brittle molded body which, according to the Demolding without further processing directly represents the base body 3. The supporting bodies 5 to 9 are each in one piece as metal molded parts of essentially constant throughout Material thickness formed and each directly attached to the mounting side 4 over a large area via one, two or more adhesive connections 10. One to all of the adhesive connections 10 have a substantially elongated rectangular surface extension in view and lie in each case in the area of an approximately equally large mounting surface 11 or 13 or 15 of the base body 3 and an approximately equally large connecting surface 12 or 14 or 16 of the associated support body 5 to 9.

All mounting or connecting surfaces take up a relatively large proportion of the area occupied by them on the mounting side 4, which can be defined by the smallest circle to be placed around this field or the smallest rectangle to be placed around this field, the outer edges of which are either parallel to the outer edges of the base 3 or the mounting and connecting surfaces or at an angle to it. Compared to this field, the area share is greater than 10 or 20%, in particular it is expedient to be about 30% or even more. In the circular field there is an adhesive connection at almost every radial distance from the center of the circle, radial gaps free of adhesive connections being smaller than the radial dimensions of one or all adhesive connections or only being in the order of 1 to 5 times the thickness of the base body 3 . Adhesive bonds 10 are located in almost every line in the rectangular field, which is parallel to one or all outer edges of this field, and here, too, any gaps can be of the order mentioned. Characterized the Sokelkörper 3 is effectively reinforced against breakage, so that it can be designed as a very thin, continuously uniform flat plate with mutually parallel, smooth-sided plate sides and edge surfaces lying at right angles to it.

The reinforcement results from the fact that the greater part of or all of the connecting surfaces are formed by plate surfaces of plate-shaped connecting parts 17, 18, which are fastened over the entire area closely to the mounting side 4 by the adhesive connections 10 and rib-like, freely projecting web from the mounting side 4 - Form or profile legs, which are simultaneously provided as supporting parts 19, 21 for functional parts and form the only stiffening ribs projecting from the mounting side 4. The supporting parts 19, 21 have approximately the same thickness as the connecting parts 17, 18 which are formed in one piece with them, but can, in view of the mounting side 4, protrude parallel to their plate plane via an associated adhesive connection 10 by an amount that is greater than half or one This adhesive connection 10 is a multiple of the dimension measured parallel and / or at right angles to it. In this view, however, the support part 21 can also lie essentially completely within the associated adhesive connection 10 or protrude beyond it at most by its material thickness.

Depending on the operational load of the support body or the support member 19, this support member 19 can also be fastened with two connecting parts 17, 18, which in the longitudinal direction of the support member 19 or parallel to an outer edge of the base body 3 at a distance from each other and / or in view of the The mounting side 4 lies essentially on mutually facing plate sides of the supporting part 19 or, in the cross-section, project freely in the opposite direction before attachment to the base body 3. At least one connecting part 18 can also project freely in the longitudinal direction of the associated support part 19 via its corresponding end. Furthermore, the respective support part 19 or 21 can rest with its corresponding edge surface on the mounting side 4 in the area of separate partial surfaces or over the entire surface without direct attachment, via corresponding be strip-shaped adhesive connections 10 and / or have a gap distance from the mounting side 4, or the like at most approximately in the order of magnitude of the material thickness of the associated connecting part 17 or 18 of the base body 3. can lie. When the edge surface is adhesively fastened, the adhesive connection between the two connecting parts 17, 18 can continuously pass through.

The substantially flat front surface of one or all of the connecting parts 17, 18 lies essentially parallel to the mounting side and is at a distance from it which is approximately equal to the material thickness of this connecting part. The front edge surface of one or all of the support parts 19, 20 can also lie essentially parallel to the mounting side 4. At least one support member 19 extends over more than half of the parallel extension of the base body 3, and adjacent and approximately parallel or approximately the same size support members 19 can overlap each other in view of the mounting side 4 with longitudinal sections so that they can overlap Capture more than two thirds of the associated extent of the base body 4 and rib-free edge regions of the base body 3 are formed only adjacent to their ends facing away from one another, but are reinforced with connecting parts 18.

Due to the described design, the above-mentioned, possible gaps in the occupation with adhesive connections are bridged by the mentioned ribs, so that all areas of the base body 3 are effective and gapless either by connecting parts 17, 18 or by ribs or supporting parts 19, 21 or by both are reinforced together against breakage.

Adhesive connections or connecting parts 17, 18 also extend approximately to at least one or all edge surfaces or outer edges 23 to 26 of the base body 3, from which the respective adhesive connection 10 may, however, have a smaller distance than the end of the respective support part from the associated outer edge or a distance which is of the order of magnitude of 1 to 4 times the material thickness of the Connection part 17 is. On the other hand, in view of the mounting side, all support parts 19 are expediently spaced within the outer boundaries of base body 3, although it is conceivable to bridge two adjacent base bodies by at least one connecting part and / or support part, thereby connecting them rigidly to one another and possibly by the gap between them to create the base bodies connection and mounting options from the rear 22 of the base body 3 for components that are to be connected to the supporting bodies or functional parts lying on the mounting side 4. This mounting or connection option can also be achieved in that at least one or all of the support bodies 5 to 9 project in view of at least one or more outer edges 23, 25, 26, an outer edge 24 expediently being free of such projecting parts.

The strength of the base 1 or the connections to the supporting bodies is also improved in that the connecting parts 17, 18 and / or the supporting parts 19, 21 from a tougher than the base body 3, more flexible and in the sense of a bending load on the base body 3 much more break resistant , namely in the structure of denser material. To increase the strengths mentioned, it can also be expedient if at least one edge surface of the base body 3 and / or its rear side 22 is included in at least one of the connections. For example, a support body 5 or 7 can have at least one alignment member 27 for an arrangement that is positioned essentially free of play with respect to the plate plane and / or at least one edge surface of the base body 3 have, whereby the assembly-oriented arrangement of the respective support body is facilitated without the aid of separate alignment devices.

The alignment member 27 of the support body 7 according to FIG. 2 is formed from an associated connecting part 18 projecting beyond an outer edge 26 and has two legs 28, 29 lying at an angle to one another, one leg 28 on the edge surface 26 and the other leg 29 bears against the rear side 22, so that a U-profile is formed with the connecting part 18, which engages around the base body 3 on the edge associated with the outer edge 26. At least one of these legs, e.g. B. the leg 28 in an opening 31 of the base body 3, there is also a positive positioning parallel to the longitudinal direction of the outer edge 26 and thus in the direction of all three mutually perpendicular spatial axes.

The connection mentioned is also suitable for fastening components or functional parts which, in view of and / or parallel to the mounting side 4, protrude beyond the base body 3 and, if appropriate, are arranged offset approximately parallel to the mounting side 4 and / or rear side 22 thereof. For example, at least one plate-shaped support flange 20 can be formed in one piece with connecting parts, aligning members 27 or a support part 21, which is located adjacent to an outer edge 23 of the base body 3 and offset from the rear 22 thereof and serves to secure the entire functional unit 2 to a corresponding one Attach the bracket mechanically worn.

The support part 21 of this or another support body can also be used for receiving or connecting a functional part, which also in view of the mounting side 4 is essentially outside the base body 3 and z. B. can be a sensor tube of a hydraulic temperature sensor, a rod sensor, an adjusting shaft or the like. Furthermore, protruding sections of the supporting bodies 6, 7, 8, 9 are formed as electrical connecting members 32, namely flat tabs, which connect directly and essentially at the same level to an associated connecting part 18 and / or transversely with respect to the mounting side 4, over outer edges 25, 26 facing away from one another or the back 22 can be offset to the front and / or back. If the respective connecting member 32 with the associated connecting part 18 forms a continuously flat, strip-shaped plate, the connecting members 32 lie with their rear sides essentially in the plane of the mounting side 4, which results in a very simple design and the associated outer edges 25, 26 as end stops can be used for plug-in sleeves.

In the illustrated embodiment, the base 1 is designed for a temperature limiter with a signal switch, as z. B. DE-OS-39 13 288 and DE-OS-39 13 289 can be seen, to which reference is made here to include the associated features and effects in the present invention. Two support bodies 8, 9 which are angular in cross section and have only two angle legs on the mounting side 4 each form with their support part a contact plate 33 which is fixed relative to the base body 3 for a movable contact and which can directly form the contact surface or can have a separate, attached contact head for this purpose . The respective contact plate 33 can be assigned a contact stop 34 for the associated movable contact, and this contact stop 34 is expediently formed by the end of the elongated strip-shaped support part 19 of a further support body 6 or 7, which are provided with a one-piece, knob-shaped configuration for this purpose can. The same support part 19 forms with its other, slightly offset by an offset end a spring bearing 35 for the flat and electrically conductive attachment of the associated end of a leaf or contact spring, which at the other end carries the movable contact lying between the contact plate 3 and the contact stop 34 . If this is a bistably arranged snap contact, the support part 19 also has, between its two ends, an integrally formed and transversely projecting abutment 36 for an end edge of an arcuately curved snap spring, which is expediently formed in one piece from the contact spring.

The connecting part 17 lying on one side of the two strip-shaped support parts 19 is angled at its end remote from the associated support part 19 to the further support part 21, which has an essentially only on its inside of the leg approximately parallel to the mounting side 4 and a freely projecting sleeve with an internal thread as an adjustment bearing 37 wears. This adjustment bearing 37 is essentially aligned with actuating bearings 38 which are provided in the form of rectangular openings between the ends and in the region of the overlapping longitudinal sections in the supporting parts 19. On the other side of the support parts is the angled from the support body 5 support member 21, which forms a sensor bearing 39 and z. B. only needs to be provided with a passage opening for a working plunger of the temperature sensor. This sensor bearing 39 is located between two connecting parts 17, 18 of the associated supporting body 5 and with a gap immediately adjacent to a connecting part 17 of the neighboring supporting part 19 which projects freely against it, the last-mentioned connecting part 17 into the gap between the connecting parts 17, 18 of the supporting body 5 engages. In the re-entering angular zone between the connecting parts 17, 18 of the other supporting parts 19 of the supporting body 6, on the other hand, the connecting part 18 of the supporting body 9 engages.

To fasten the respective support body, the base body 3 on the mounting side 4 is closely limited to the area size of the associated adhesive connection 10 or mounting area 11 with a possibly a few 10th millimeter or less 1/10 millimeter thick connecting layer 30 which is essentially of constant thickness, e.g. B. can be printed. Thereafter, with the base body 3 in an approximately horizontal position, the associated support body is placed with its connecting surface or its connecting surfaces 12 in such a way that they lie flush with the mounting surfaces 11 or the connecting layers 30. The connecting surface or connecting surfaces 12 of the support body are arranged with respect to its center of gravity so that they form stable support surfaces for the support body in the sense that it is arranged free-standing on the support surfaces and cannot tip over without additional support measures.

After all the necessary supporting bodies 5 to 9 have been placed in this way and optionally pre-tacked by self-adhesive, the unit thus prepared is passed through a heating chamber, e.g. B. a soldering furnace, in which the initially substantially solid connection layer 30 including the surfaces 11, 12 and their bodies are completely heated to at least the melting temperature of the connection layer 30 and thereby the connection layer 30 is liquefied. As a result, it penetrates into the surface pores of the surfaces 11, 12. This does not require a separate, mechanical pressure load for pressing the connecting parts 17, 18 against the mounting surfaces 11, since the weight of the respective supporting body alone is sufficient for this. But it is also conceivable to produce the connection in the manner of an induction welding or with an electric welding gun with which the respective connecting part 17, 18 is pressed against the base body until the connecting layer 30 solidifies.

In the liquid state, the connecting layer 30 is displaced to the outer edges of the connecting part 17, 18 under the normal forces that occur, so that it forms a hollow fillet weld 40 after solidification on the edge surfaces of the connecting part 17, 18 or following the connecting surface 12, which surrounds the connecting part 17, 18 on at least three outer edges lying at an angle to one another and, in the case of a connecting part 18 projecting over an outer edge 25 or 26, can also grasp the associated edge and plate surfaces of the two bodies. Furthermore, the connecting layer can also be provided in the area of the connecting member 27 or in the area of the leg 28 and / or the leg 29 and thereby un ^ C ^ S19 ^ @ ^ Q $! ^ P ^ @ n from the mounting side 4 to the associated edge surface Go through 23 or 25 or 26 and / or back 22.

However, a supporting body can also carry a component which projects freely from a connecting part or an alignment member or an adhesive connection and which can be moved as a functional part relative to the base body and instead of on the mounting side 4 by the adhesive connection, if appropriate, only on an edge surface and / or the rear side of the base body is attached. For example, the support flange 20 can be moved or deflected elastically relative to the base body 1, so that vibrations acting on its holder are not transmitted to the base 1 in an undamped manner. Since the support flange 20 cannot be placed on the mounting side 4 in a stable, self-standing manner due to the given center of gravity, such components expediently have the explained positioning or alignment members 27.

The method according to the invention enables a fully automated production of at least the base 1 and possibly also the entire functional unit by means of corresponding production and assembly machines, in which all the necessary operations can be carried out under program control and essentially without manual work. For example, the mounting side 4 of the base body 3 can first be provided with the electrically conductive or insulating connecting layers 30 in one pass through an application unit on the predetermined mounting surfaces 11 or over the entire surface. Then, with one or more grippers, the support bodies 5 to 9 are placed one after the other, in groups or all together in the correct position on the approximately horizontal mounting side 4 and stapled in such a way that they can no longer be moved at least parallel to the mounting side 4 even under greater loads. In the further run, the final adhesive connection 10 described is then produced.

After cooling, the functional parts still required, indicated by dash-dotted lines in FIG. 1, can then be attached in the further run, after which the adjustment of the functional unit is carried out and finally a hood-shaped cover 41 is snapped so that it lies with the plate or base body lying in its hood opening 3 delimits an essentially closed housing space, in which all the components arranged within the outer boundaries of the base body 3 on the mounting side 4 are located and over which the connecting members 32 or the supporting flange 20 project outwards. Since the support body 5 to 9 are resistant to the temperatures required to produce the final adhesive connections 10 and are designed such that Subsequently less temperature-resistant components are added, there is the advantage that all the bodies to be joined together can be heated to the required temperature over their entire physical extent and not only a partial physical heating, such as with a soldering gun, is possible for producing the adhesive connections 10 .

The support body 5 can form a preassembled unit with the outer tube 43 of a rod-shaped temperature sensor 42 which projects approximately parallel to the mounting side 4 like the support flange 20 over the outer edge 23 which is further away from the adjustment bearing 37. The associated end of the outer tube 43 may, for. B. be rigidly connected by welding to the actuating bearing 38 or engage centered in a bore of the sensor bearing 39. In the outer tube 43 is an inner rod 44 which is supported with its outer end at a stop in the region of the free end relative to the outer tube 43 and its inner end extending into the area of the mounting side 4 as a push rod on a z. B. made of ceramic material actuating plunger 45, which is guided in the actuating bearings 38 slidably. The electrically insulating actuating plunger 45 acts with an actuating shoulder on a pressure cam of a contact spring 47 of the snap contact closer to the temperature sensor 42, the dimensionally stable base body of which is formed directly by the supporting part 19 of the associated supporting body 7. The actuating plunger 45 also penetrates the snap spring 47 of the respective snap contact in the region of a corresponding opening which is adjacent to the snap spring 48 in the longitudinal direction. In Fig. 1, the contact spring of only one snap switch or support body 7 is shown, while the not shown spring of the other support body 6 lies on the opposite side of the associated support member 19.

The end of the actuating plunger 45 protruding from this side is axially supported with respect to an adjusting member 46 designed as a screw, the supporting surface of which is optionally resiliently tensioned against the end surface of the actuating plunger 45 so that it is axially free of play with respect to the inner rod 44. Instead of guiding the adjusting member 46 directly in the internal thread of the adjusting bearing 37, the adjusting bearing 37 can accommodate an adjusting support on which the adjusting member 46 is adjustable and fixable so as to be axially displaceable and resiliently loaded against the actuating plunger 45. Instead of the actuating plunger 45, this adjusting support can then act on the pressure cam of the snap switch enclosing the supporting body 6 for actuation.

The invention relates, regardless of the training described, further to a switching device, in particular a temperature limiter for radiant heating units or the like, which, when a certain limit temperature is exceeded, automatically switches part or all of the installed power of the heating device provided with the switching device when a certain limit temperature is exceeded switches off and switches on again automatically after falling below a predetermined limit temperature. Such switching devices can, for. B. according to DE-OS 35 40 414, 37 05 260 and 39 13 289, to which reference is made for further features, effects and advantages for the purpose of inclusion in the present invention.

If the circuit breaker is adjusted after the switching device has been installed in the heating device, this is relatively complicated because the adjusting member then mostly is very difficult to access. Therefore, an inventive method for adjustment is proposed, according to which the adjustment of one or more of the switches of the switching device in its separate state from the associated heating device, for. B. is carried out in one go with the assembly of the components of the switching device, the adjustment is expediently carried out in an automatic assembly and production line as an approximately last manufacturing step. The associated adjuster can then z. B. according to the patent application P 40 29 351.3 formed on its bearing surface substantially smooth and / or fixed by welding in the adjustment position. Reference is therefore made to this patent application for further features, effects and advantages for the purpose of inclusion in the present invention.

The adjustment or the adjustment member for the signal switch which is further away from the temperature sensor than the circuit breaker is expediently provided or accessible in the region of the outside of the base facing away from the temperature sensor. This adjusting member can then correspond to the adjusting member 46 according to FIG. 1 in terms of position and design. This adjusting member is preferably provided on its bearing surface instead of an external thread with a thread-free smooth bearing or outer surface, so that it can only be adjusted by longitudinally displacing it along the likewise smooth-faced, substantially radially clearance-free bearing opening of the adjusting bearing 37. The adjusting member can thereby be designed as a piece of rod or round wire piece produced only by cutting from a profile bar without further finishing. After adjusting the signal contact, the adjusting member 46 is then fixed in a non-detachable manner by welding, in particular laser welding, relative to the adjusting bearing 37 or the supporting part 21. This can also cause accidental Adjustment of the adjustment at a later time can be completely excluded.

For the non-destructive and screw-free securing of the cover 41 relative to the base 1, the cover 41 expediently has latching members 40 in the region of its hood opening on the inside of its jacket wall, which are assigned counter-members 50 on the base 1 for resilient self-engagement. Are these counterparts 50, z. B. in the form of openings, on one or more support bodies, for example on legs 48, provided and / or formed only by the back 22 of the socket body 3, it need not be provided with any particular deformations to form counter-members.

Claims (12)

Base for at least part of a functional unit (2), such as an electromechanical or sensor-controlled, hydraulically controlled, hand-controlled or similar switching unit, characterized in that at least one base body (3), at least one mounting side (4) or at least one mounting surface ( 11) made of an insulating material or the like and / or at least one supporting body (5 to 9) fastened to a mounting surface (11) with at least one connecting surface (12) for a mechanically loaded functional part or the like and / or that at least one Support body (5 to 9) is at least partially attached to at least one base body (3) via at least one adhesive connection (10), in particular essentially exclusively via a fusion connection. Base according to claim 1, characterized in that at least one base body (3) essentially at least in the area of the respective mounting surface (11) Gradations, depressions and / or openings are free, in particular has a substantially continuously continuous surface, wherein a base body (3) preferably on at least one side forms an approximately flat plate surface continuously within its outer edges (23 to 26) or that at least one mounting surface (11) consists of a temperature-resistant material, in particular an essentially mineral material, such as ceramic, with at least one base body (3) being of approximately one-piece and / or closed plate shape, essentially over its thickness or surface area. Base according to claim 1 or 2, characterized in that at least one connecting surface (12) of the respective supporting body (5 to 9) is essentially parallel to the associated mounting surface (11), in particular transverse to edge surfaces of a connecting part (17, 18) and / or is larger in relation to these edge surfaces, a connecting surface (12) preferably passing essentially continuously without outside edges of the connecting part (17, 18), which is in particular plate-shaped. Base according to one of the preceding claims, characterized in that at least one connecting surface (12) lies transversely to at least one supporting part (19, 21) of an optionally associated supporting body (5 to 9), in particular forms a one-piece angle profile with this, that preferably at least a support member (19, 21) for receiving a movable contact, a fixed contact, a sensor, an adjusting member, an actuator, a working spring, a connector or Like. Is formed and / or a support body (5) forms a support flange (20) for the base (1). Base according to one of the preceding claims, characterized in that at least one support body (5 to 9) is fastened with at least two connecting surfaces (12) which are at a distance from one another or are connected to one another only via an edge surface, that preferably connecting surfaces (12) on opposite sides of a possibly associated supporting part (19) protrude or are offset from one another in a longitudinal direction of a supporting part (19), that in particular at least one connecting surface (12) is formed by a shaft section of a connecting member (32) and / or that at least one supporting body (6 to 9) has an approximately parallel to a possibly associated connecting surface (12), in particular essentially formed by a connecting surface (12), standing surface for free-standing support on a mounting side (4) of at least one base body (3). Base according to one of the preceding claims, characterized in that in view of a mounting surface (4) at least one connection surface (12) of at least one first support body (7 or 9) at least partially between connection surfaces (12) of at least one second support body (5 or 6) engages, which lie opposite one another and / or form an angle limitation, that preferably a connecting surface (12) of a first supporting body (7 or 9) is formed by at least one connecting part (17 or 18) which is opposite at least one further or adjacent connecting part of a second support body (5 or 6) protrudes freely and / or that at least one connecting surface (12) one end of a possibly associated supporting body (5 to 9) connects or at least one connecting surface (12) lies at a distance between the ends of a supporting body (6, 7), the respective supporting part (19, 21) having a surface preferably over at least one essentially angled to a mounting surface (4) passes directly into an associated connecting surface (12). Base according to one of the preceding claims, characterized in that of a total number of connecting surfaces (12) at least one to all connecting surfaces (12) essentially connect to outer edges (23 to 25) of the respective base body (3) and / or that Total size of all connecting surfaces of the respective support body (5 to 9) is at least approximately in the order of magnitude of a transverse one-sided overall surface of at least one associated support part (19, 21), a base body (3) preferably rectangular with continuously continuous outer edges ( 23 to 26) and / or that of a total number of connecting surfaces (12) lying on a mounting side (4) of at least one base body (3), at least one to all connecting surfaces (12) lie approximately in a common plane and in particular by essentially the same thickness, plate-shaped connecting parts (17, 18) are formed, which only protrude approximately by their plate thickness over this mounting side (4), the respective supporting body (5 to 9) preferably being formed by a stamped and bent part. Base according to one of the preceding claims, characterized in that at least one support body (5 to 9) at least one in one in the area of a Outer base edge (23 to 26) of the opposite member of at least one base body (3) engaging alignment member (27) for essentially form-fitting assembly alignment in at least one of three spatial axes, that an alignment member (27) preferably has an outer edge (23, 26) and / or a side (22) of a base body (3) facing away from a mounting side (4) and that in particular an alignment member (27) as a U-shaped plug-in member for receiving an edge region of a base body (3) and / or in one piece with a support body (5 to 9) is formed. Base according to one of the preceding claims, characterized in that at least one adhesive connection (10) by means of an adhesive or separate from the mounting surface (11) of the base body (3) and / or the connecting surface (12) of the support body (5 to 9) Connection layer (30), in particular a metallic layer, such as a solder layer, a ceramic melt layer or the like, is formed, which is preferably printed on the base body (3) or anchored in the fine porosity of the mounting surface, which is essentially smoothly compacted with respect to core areas. Base according to one of the preceding claims, characterized in that a functional unit (2) is a temperature switch with a thermomechanical sensor (42), in particular approximately parallel to the mounting side (4) above the base body (3), which is preferably a power contact or a signal contact assigned, which is actuated via a switching mechanism and in particular is at least partially covered by a hood-shaped cover (41), which at least in the area an outer edge (23 to 26) of a base body (3) is fixed. Base according to one of the preceding claims, characterized in that of a total number of connection members (32), in particular tabs, at least one base (3) at least one to all connection members (32) approximately in the plane of a base body (3) and / or lie in a level adjoining a mounting side of a base body (3), a section of a support body (6 to 9) forming a connecting element (32) projecting over an outer edge (25, 26) of a base body (3) preferably being less weight than has a section covering a mounting side (4). Base according to one of the preceding claims, characterized in that at least one adjustment for at least one functional unit provided on the base (1), in particular for at least one sensor-controlled switch, is secured by a hardened fused connection, and that preferably one at a distance from a temperature sensor ( 42) lying adjustment member (46) for a signal switch is designed as a rod member with a smooth surface on a bearing circumference and is secured against a corresponding adjustment bearing (37) by a welded connection, such as a laser welded connection, so that it cannot be detached.

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