SI9720091A - Knob konnection for a multipolar switching device - Google Patents

Abstract

The invention relates to a knob connection for a multipolar switching device that is composed of single-pole switching devices, the single-polar switching devices of which have thermoplastic operating knobs, arranged juxtaposed and pivoting around a common axis, and connected by means of a rigid grip strip covering the individual operating knobs. The operating knobs (1) have, on the narrow side facing upwards, a slit-like recess (1.3) closed on both front sides (1.4) and running in axial direction. The recess has undercuts (1.6), facing both side faces, in a plane perpendicular to the axis direction (2.1'). The grip strip (3), which is also made of thermoplast, has peg-shaped protruding elements (3.1), across the width of the single-pole switching devices and corresponding to their number, which, with serrated projections (3.2) adapted to the undercuts (1.6), can be later, elastically, as well as captively locked twist-proof into the recesses (1.3), while lengthwise along the grip strip (3), between the protruding elements (3.1) and the recesses (1.3), there is sufficient play to compensate for tolerances and material contraction.

Description

AEG NIEDERSPANNUNGSTECHNIK GMBH & CO. KG KG

Connection to crossbar for multi-pole switchgear

The invention relates to the connection to a crossbar for a multi-pole switchgear consisting of single-pole switchgear according to the introductory part of the first patent claim.

This connection to the crossbar is known from, for example, EP 0 662 702 Al. In this case, the operating transverse bar is designed as elastically deformable joints of the workpieces, by opening a gap in the crank holder one on both fronts, through open, flexible arms extending between them from each other. As a connecting part in the axial direction, the control rods located next to each other serve as a metal plug extending through the switchgear between the arms of all the joints of the parts.

Due to the necessary compressive force of the limbs on the stud, the individual crank arms are very spacious in this installation and therefore require a considerable open cross section in the switch housing. Particularly at the rotating angles of the control transverse bars of about 90 ° and above between the on and off positions, there are difficult structural problems at their place of bearing inside the housing and at the exit opening of the holder.

It is an object of the invention to improve the connection with the crossbar of the said species in a cost-effective manner so that, despite the slender outlet cross section of the single-pole switches, the individual control transverse rods can subsequently be connected to the torsion-resistant and hand-hand-friendly holding rails by means of a pivotally secure connection, the axial holding bar being provided permanently to provide longitudinal offset, caused by subsequent shrinkage, side-by-side, preferably from a ductile-made switch housing.

This task is solved by connecting to a crossbar with the features of the first patent claim. Further embodiments and preferred embodiments of the invention are set forth in the sub-claims.

The advantage of the invention is that, after applying single-pole switches, for example in a two-, three- or four-pole switchgear, a subsequently appropriately long retaining lath can be snapped into the fragments of transverse bars extending from the switch housings by a simple plug-in procedure from the front. . All the control transverse bars are then pivotally secured one after the other, and the common control transverse rod appears to be a solid common component, although with the changes in climate and subsequent shrinkage of the switch housings, the induced changes in dimensions between the side-by-side individual fields are overcome by sufficient longitudinal clearance. At the same time, the retaining lath can be ergonomically well managed and easily designed to the customer's wishes, both safely and in acceptable form. The construction of design tools for the manufacture of crossbar rods is also not subject to specific requirements, since, according to current practice, the simplification of the tools is complete.

Based on the drawing, the invention is further explained with an embodiment.

Figure 1 schematically shows the connection to the crossbar before assembly of the components, while Figure 2 shows for the four-pole switchgear the connection to the crossbar after assembly in the same way.

Figure 3 shows a cross-sectional view through a functionally received composite connection with a crossbar in one plane perpendicular to the axial direction and Figure 4 in the same plane corresponding to a side view, while Figure 5 shows a longitudinal section along the line V-V of Figure 4.

Preferably, a thermoplastic connection with a crossbar for a multi-pole switchgear shows a single shortened control transverse bar 1, which is predominantly located inside only schematically in Fig. 4 of the switch housing 2 and is pivoted therein by its bore 1.1 on the axis 2.1 of the housing. The service crossbar extends with a short, relatively slender and large fragment 1.2 of the crossbar from the opening 2.2, which is adapted to the on and off position, and can subsequently be connected to the gripper 3 extending through the single pole switchgear on their operating side. For this purpose, the holding strip 3 is suitable for the number of individual poles and, in a predetermined dividing measure of at least 18 mm width, is provided with attachments 3.1 which are projected in a uniform direction forward at its wedge-shaped, lower edge 3 'of the heart profile section.

The extensions 3.1 have, for their part, a profile in the form of elongated holes with half-cylindrical end contours 3.11, 3.12 and a slightly narrower 3.13 cross-section, which is provided with saw-tooth outgrowths on both sides (Figure 1, Figure 3). The outgrowths of 3.2 are thus formed on the crossbar 3.13 ascending along the holding bar. In addition, at one end contour 3.12, the coding step 3.3, which cooperates with the coding step to be described, is removed in the fragment 1.2 of the transverse bar and provides a laterally correct connection between the holding bar 3 and the control transverse bars 1.

For this purpose, a slit opening 1.3 is formed from each upper portion of the control rod 1.2 from its upper narrow side, which is closed at least partially on both front sides 1.4. Fragment 1.2 of the transverse bar thus forms a stable frame around the opening 1.3, which is definitely broken in the upper region on one front face (as can be clearly recognized in Fig. 1), so that two slightly deformable ones are formed in the longitudinal direction of the transverse bar. narrow slats 1.5 and fully grooved, with surface adhered to the lower side profile 3 adapted to the surface.

Further, slots 1.6 are formed inside the opening 1.3 below both slats 1.5, as shown above in Figure 3. These slits 1.6 are technically technically shaped in the working direction of the tool from the front sides of the control transverse bar, as indicated by the openings 1.7 on the side of the forehead, without damaging the stability of the opening 1.3.

In the same way, a coding stage 1.8 (FIG. 5) can be formed inside the openings 1.3, which is adapted to the coding stage 3.3 on the retaining lug, and determines laterally correct deposition. In the case of incorrect mounting of the support strip, rotated 180 ° around the longitudinal direction, the longer end contour 3.11 settles to the coding step 1.8, thereby noticeably preventing the attachment 3.1 from completely sinking into the openings 1.3.

Connection to the crossbar of a multi-pole switchgear with, for example, four serving crossbars 1 according to Figure 2, is made by directly inserting a suitable holding strip 3 with its four downward-facing fittings directly

3.1. Into the corresponding openings of the 1.3 transverse column fragments. In this case, the slanting protuberances 3.2 slide somehow in the central region along the slightly extending laths 1.5 and elastically extend them until they correspond to the undercut 1.6. This position is mainly illustrated by Figure 3, from which lateral narrow guidance in a good way of preferentially cardiac grip profile between the two laths 1.5 can also be recognized.

The high safety on the rotation between the grip rail and the control transverse bars relative to the common axis 2. pa, however, is determined primarily by the attachment

3.1 and its columnar end contours 3.11, 3.12, extending laterally very precisely as well as deep into the slit opening 3.1 and are tightly fitting there on both sides (Figure 3). In the axial direction, sufficient longitudinal clearance is given, also with respect to the front faces of 1.4 fragments of the transverse bar, as is clearly indicated in Figure 5. All in all, a narrow and solid interconnection is formed between the retaining lath 3 and the control transverse bars 1 - similar to when working from one piece - it is however possible to have sufficient longitudinal movement of the retaining lath relative to the control transverse bars due to climatic fluctuations and for long-term use of conditioned material wear on the enclosures.

For

AEG NIEDERSPANNUNGSTECHNIK GMBH & CO. KG KG: PATENT RSARNA. d.o.o.

Claims (4)

Patent claims 1. Linkage to a transverse pole for a multipole switchgear consisting of single-pole switchgear and having one-pole switchgear adjacent to each other having rotary and thermoplastically shaped control transverse poles connected to it by means of a rigid holding strip which extends beyond the individual control transverse bars, characterized in that the transverse control poles (1) are provided with a slotted opening (1.3) extending in the axial direction and closed on both front faces (1.4) on their upstream narrow side. by its side against the two lateral surfaces in the plane perpendicular to the axial direction (2. Γ) shows the cuts (1.6), and that the retaining strip (3), which is also made of thermoplastic, shows in the division of single-pole switchgear as well as corresponding to their number stopper protrusions (3.1), which can subsequently be elastically and indelibly and rotarily securely inserted into openings (1.3) with toothed projections Weights (3.2) that are adjusted to the undercut (1.6), while sufficient clearance is provided in the longitudinal direction of the retaining lath (3) between the mountings (3.2) and the openings (1.3) to balance the tolerances and material wear. Crossbar link according to claim 1, characterized in that the preferentially cardiac profile showing the holding bar (3) with its wedge-shaped, rounded edge (3 ') precisely fits into the groove-shaped upper narrow narrow side of the serving crossbar (1) ), and there is a slightly and slightly deformable lath (1.5) located on both sides of the opening (1.3) in the axial direction (2.Γ) after tightening the outgrowths (3.2) along the grooves (1.6), tightly guided and held. Crossbar link according to claim 1 or 2, characterized in that both the opening (1.3) in the control crossbar (1) and the nozzle (3.1) on the retaining lath (3) show a coding step (1.8 / 3.3) and this ensures that the fixing bar (3) is correctly positioned relative to the control transverse bars (1). Linkage to the crossbar according to one of Claims 1 to 3, characterized in that the gripping strip (3) exhibits a somewhat double width at the widest point of its cardiac cross section with respect to the associated fragments (1.2) extending freely from the enclosures (1.2). 2) switchgear (1.2).