Abstract:
A quick-action closure coupling for connecting a supply or discharge line to a wall of a collecting tank of a heat exchanger. The coupling can include a first coupling part and a second coupling part dimensioned to mate together. At least one sealing ring can be positioned between the first and second coupling parts. A latch can be provided in order to lock the coupling parts together. In order to simplify the quick-action closure coupling, the terminal end of the one coupling part can have a mitered cutout into which is received a portion of the other coupling part.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     Priority is hereby claimed to German Patent Application No. DE 10 2007 006 588.6, filed Feb. 9, 2007, the entire contents of which is incorporated herein by reference. 
     SUMMARY 
     The invention relates to a quick-action closure coupling for connecting a supply or discharge line to the wall of the collecting tank of a heat exchanger, including a first coupling part and a second coupling part with a radially inner peripheral wall. The first coupling part has a radially outer peripheral wall, with at least one sealing ring being arranged between the peripheral walls, and with latching points being provided in order to lock the coupling parts. 
     DE 100 17 679 C1 discloses a conventional quick-action closure coupling. The construction presented in said document can be considered to be advantageous because it permits a compact, space-saving design of the quick-action closure coupling which therefore meets the demands of vehicle manufacturers. This applies in particular if one of the two coupling parts as presented in the cited disclosure is to be embodied as an angle piece or the like. Because the second coupling part of the conventional quick-action closure coupling has, in addition to the radially inner peripheral wall, a radially spaced-apart second peripheral wall, the producibility of the coupling part appears to be impaired. The peripheral wall of the first coupling part is situated, in the coupled state, between the two peripheral walls of the line-side or of the second coupling part. In addition, in the conventional design, a securing ring is provided, which is intended to improve stability but which also increases the expenditure. 
     One independent object of the invention is that of creating a quick-action closure coupling which should have a more simple design and which, with regard to compactness, should at least stay in line with the described prior art. As explained in more detail below, this and other objects are achieved by one or more of the embodiments of the present invention. 
     According to one embodiment of the present invention, the radially outer peripheral wall has a mitered cutout into which the second coupling part engages. In a preferred design, the peripheral wall of the line-side or of the second coupling part nestles tightly against the edge of the cutout. A further advantage was revealed as a result, specifically that of the mitered cutout being provided with guiding properties for the coupling parts. This means that the two coupling parts, as they are pressed together axially, can slide into the operating position about a defined rotational angle about the axis. This so-called “centering action” can be considered to be an important advantage for the user. 
     The possibility of a very compact configuration is also provided. In particular, when the one coupling part is to be embodied as an angle pipe, the coupling part can be arranged in the direct vicinity of the wall of the collecting tank. The installation space is thereby utilized well. 
     It is provided that an anti-twist device, such as, for example, in the form of a lug which engages into a groove, is formed between the line-side (second) coupling part and the tank-side (first) coupling part. It is also possible for projections to be arranged on one coupling part, which projections are supported in the mitered cutout and which also act as an anti-twist device and as an anti-tilt device. 
     In some embodiments, the peripheral wall has at least two opposing grooves or slots which belong to the latching points. 
     In some embodiments, the line-side, second coupling part has at least two elastic arms on which are formed other projections which, in the closed position, engage into the slots or grooves. 
     It is advantageous for a holding groove for the sealing ring to be arranged on one of the coupling parts, with the sealing ring being situated, in the closed position (operating position), between the peripheral walls. The holding groove has the advantage over the cited prior art that it is possible to dispense with a securing ring. 
     In order to be able to use a simply-shaped sealing ring, for example a so-called O-ring, it is provided that the sealing ring, in the closed position, is arranged in a plane which is arranged axially further towards the tank-side coupling part than the depth of the cutout. It can also be considered advantageous for the sealing face to be situated at the inside on the tank-side coupling part, because damage can often occur to the outer side of the tank-side coupling part during the course of production of the heat exchanger, which damage adversely affects the sealing action. 
     Other aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention is now briefly described in various exemplary embodiments with reference to the appended drawings. The figures show the following. 
         FIGS. 1 and 2  show the collecting tank of a heat exchanger with a quick-action closure coupling in coupled and in non-coupled states. 
         FIGS. 3-9  show various views or sections of the quick-action closure coupling from  FIGS. 1 and 2 . 
         FIGS. 10-12  show another exemplary embodiment, in which the first coupling part is not integrally formed with the collecting tank. 
         FIGS. 13-15  show a further exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings. 
       FIGS. 1-9  illustrate an exemplary embodiment of the present invention in which two coupling parts A and B and a collecting tank  1  of the heat exchanger (not illustrated) have been produced from plastic. In this exemplary embodiment, it is also provided that the first coupling part A is formed in one piece or integrally with the collecting tank  1 . The second coupling part B is embodied as an angled pipe. The second coupling part B has a peripheral wall B 1  arranged radially at the inside. A holding groove for an O-ring seal D is formed in the peripheral wall B 1 . The seal D ensures the required sealing action between the peripheral wall B 1  and the radially outer peripheral wall A 1  which belongs to the first coupling part A. 
     The first coupling part A is formed with a mitered cutout G. The peripheral wall B 1  of the second coupling part B engages into the cutout G, which leads to an uncomplicated, compact shape configuration. At this point, it can be pointed out that the length of the first coupling part A has been illustrated to be larger than it should be in  FIGS. 1 and 2 . In a practical application, the coupling part A will thus be very short, with the second coupling part B then bearing closely against the wall of the collecting tank  1 . By way of example, a fairly short coupling part A is provided in  FIGS. 6-9 . The seal D is situated outside the region of the cutout G in order that the sealing action is not adversely affected. The provision of fins  30  or the like, which fit precisely into the intermediate space between the two peripheral walls A 1  and B 1  and which thereby also improve the stability, also serve this purpose. The two projections  31  which are formed on the inner peripheral wall B 1  and which are supported on the mitered cutout G also aim in this direction ( FIGS. 4 and 6 ). 
     Primarily the lug  11  on the inner peripheral wall B 1  serves as an anti-twist device between the coupling parts A and B, which lug  11  corresponds with a notch  12  in the outer peripheral wall A 1  (for example  FIG. 8 ). 
     In order to prevent the coupling parts A and B from being detached from one another, latching points have been provided in the illustrated exemplary embodiments, in which latching points are embodied as slots  15  in the outer peripheral wall A 1  and as projections  21  which are arranged on elastic arms  20 . The arms  20  are formed in one piece with the inner peripheral wall B 1 . As the second coupling part B is plugged into the first coupling part A, the arms  20  are pressed against the inner peripheral wall B 1  until the projections  21  latch into the slots  15 . The arms  20  can, for detachment, be pressed together in order to remove the form-fitting action between the projections  21  and the slots  15  again. 
     In an alternative exemplary embodiment which is not shown, slots  15  are likewise provided in the outer peripheral wall A 1 . Outwardly open grooves are however formed on the inner peripheral wall B 1 . Here, a bracket is then used which engages through the slots  15  into the grooves in order to prevent the coupling parts A and B from being detachable from one another. In order to detach the coupling parts, the bracket must be removed or at least moved out of the locking position. 
       FIGS. 10-12  diagrammatically illustrate an exemplary embodiment in which the first coupling part A is not formed integrally with the collecting tank  1 . In this and other embodiments, the collecting tank  1  could be composed of metal. The second coupling part B is composed of plastic, similarly to the first exemplary embodiment. In this exemplary embodiment, as per  FIG. 10  or  11 , the outer peripheral wall A 1  is formed from an opening flange of the collecting tank  1  and an integrally soldered connecting pipe  40 . In  FIGS. 10 and 12 , the opening flange points inwardly into the collecting tank  1  (not shown), and outwardly in  FIG. 11 . The outer peripheral wall A 1 , that is to say the connecting pipe  40 , of the exemplary embodiment also has a mitered cutout G into which the second coupling part B engages, even if this is not shown in the diagrams. 
     The exemplary embodiment of  FIGS. 13-15  shows two coupling parts A and B which are of approximately straight design, that is to say not as an angle pipe in the above-described sense. The coupling part B which is the line-side coupling part in fact has a branch connecting pipe (BS) which, in this exemplary embodiment, is formed in one piece with the coupling part B. In turn, the branch connecting pipe, in the operating position which is shown in the figures, nestles into the mitered cutout G of the tank-side coupling part A and likewise leads to the above-described advantages.  FIG. 15  shows the section A-A which is indicated in the plan view of  FIG. 13 .  FIG. 14  shows a side view of the same coupling. As can also be seen from the figures, the coupling part A here has two opposite mitered cutouts G. A second branch connecting pipe is situated in the second mitered cutout G. 
     Various features and advantages of the invention are set forth in the following claims.