MXPA97005058A - Combusti vessel - Google Patents

Abstract

The present invention relates to a fuel tank which comprises in particular thermoplastic material and which is destined to be fitted in a motor vehicle, having an opening in the wall of the tank enclosed by a retaining lid provided for retaining, for example, indicator ducts of the filling level and pumps with the interposition of a sealing ring, which is preferably in the shape of an O-ring, and a fixing means for the holding lid, by means of which the latter is forced towards the wall of the container. tank, wherein the sealing ring is placed in a groove on the tank or on the retaining cap, and the cross sections of the groove and sealing ring are selected such that the retaining cap in its operating position that closes the opening, is supported directly by the wall of the tank that leans against this characterized by a connection portion that surrounds the aber It is provided on its end face with the groove and is retained by a divider adjusting ring, which with its inwardly directed extension, engages behind an outer flange similar to a flange, of the connecting portion and bears the ring. retention

Description

FUEL CONTAINER DESCRIPTION OF THE INVENTION The invention relates to a fuel container, according to the main idea of claim 1. In a fuel container of that type known from the patent document DE-PS 4240629, is the so that the retaining cap is exclusively supported on the rubber elastic sealing ring in order to apply high pressure forces and be able to equal or compensate the existing manufacturing tolerances. In this arrangement, the elastic rubber sealing ring is the constructive part of the connection between the container and the retaining cover. This has the disadvantage that the sealing ring must fulfill two functions properly sealing on the one hand and on the other, be a constructive part for the transmission of forces, with the consequence that a variation of position of the sealing ring, for example, by rippling or wrinkling the material that forms it because of the effect of the fuel can also lead to an influence on the conformation of the joint. Furthermore, it is known from the patent application DE-OS 3135982, a fuel container of thermoplastic material for a motor vehicle with a filling support and a connecting socket there joined, which receives the closure cap of the filling support. Here a sealing ring is arranged between the support or filling support and the connecting socket, which is supported by the elastic ring against the support surface of the filling support. Also here, the objective of the placement of the arrangement is to compensate by means of the elasticity of the sealing ring the tolerances that are presented by the variations of measurement and different coefficients of expansion, so that in the essentials also the disadvantages are presented described in relation to the fuel container according to DE-PS 4240629. Therefore, the present invention proposes the object of forming a fuel container of the type already described, in such a way as to avoid the disadvantages of the known containers. Especially the sealing ring must perform no function as a constructive part of the joint, thereby preventing any effect on the sealing ring, for example by wrinkling or stretch marks in the material forming it and which could influence the sealing ring. change the conformation of the union between the fuel container and the lid on the effectiveness of the union. This objective is achieved by using the features presented in claim 1. In order to achieve the necessary sealing effect, it is essential that the sealing ring in the unconstrained state of the retaining cap protrudes in the direction of the other part of the seal. In this way, in order to fix the groove in the fuel container support, do so in the direction of the retaining cap towards the retaining cap, and when the groove in the retaining cap is toward the holder. The depth of the groove or penetration, of the sealing ring not deformed and made as a ring in ü, in the groove must be selected in such a way that it is smaller than the diameter of the sealing ring, however, here it must be the cross section of the groove is so large that it can completely receive the sealing ring in the corresponding cross-sectional shape when it is pressed by the support and the retaining cap, in order to achieve, on the one hand, a free sealing of the same. problems and on the other hand the sealing ring is not a component of the carrier structure of the joining arrangement. The fixing means securing the retaining cap in its position can be constructed as a tension band. But it is also possible to dispose in the support the retaining ring of a bayonet-type snap-in latch, which acted together with a snap ring, and this forced the snap-off cap in the direction of the front surface of the holder by grabbing it on its perà © spheric edge.

Another possibility consists in providing support on the outer side with a screw thread on which a cap nut is screwed, whose edge area grips the edge or margin area of the retaining cap. In each case there must be the possibility that the retaining cap on which, for example, inside the fuel container the pump attachments, the withdrawal ducts, the filling meter, etc., may be placed in a direction determined in reference to its peripheral position, and with this they are joined to the fuel container, in order to guarantee a defined arrangement of the parts placed next to the retaining cover with respect to the tank. This can be achieved in the usual way, because in the supports in the fixing means and in the retaining cover parts are provided that cause a closing of form that allow the placement or installation of the parts that act together only in predetermined positions, to achieve that the fuel pump, the filling gauge and other devices and devices take a certain space into the fuel container, positions which, after removing the connection between the retaining cap and the fuel container, are reproducibly reproducible upon return to to assemble. In the drawing some embodiments of the invention are shown, showing: "FIGURE 1, a cross-section through the retaining bracket of a fuel container with an aili retaining cap disposed which is maintained by a pressure ring; FIGURE 2, the fuel container support without retaining cap; FIGURE 3, a plan view on the pressure ring partially in section; FIGURE 4, a representation corresponding to the Fig. 1, of a second embodiment in which the fixing means is constructed of the type of a bayonet closure; FIGURE 5, a representation corresponding to the Fig. 4, of another embodiment with a bayonet closure; FIGURE 6, a representation corresponding to the Fig. 1, of a fourth embodiment. Fig. 1 shows a section of a fuel container 10, which is installed in a motor vehicle.

This container 10 is provided with an outwardly projecting support 12 having an opening 14 at its limit, such containers are generally produced by a method of blowing from thermoplastic synthetic material, where the support 12 is first closed in its free end. The opening 14, is usually manufactured by a special cutting process. The opening 14 is closed by a retaining lid 16, which usually consists of a different material than the container? Eom & B fc? * L ?, Ltt Q, i £ 4 to be made of a metallic material, however, also in case of a synthetic material, consisting of the synthetic material from which the fuel container 10 is made, differing by a greater hardness The container of synthetic material blow molded and made of synthetic material, is generally manufactured using a polyol-phosphine. In the example of ralisation shown in the drawing, the retaining lid 16 serves to retain the conductor sections 18, by means of which a connection is made between the interior of the fuel container 10, and the external environment. These conductor sections 18 may be part of the outlet conduits or special devices that are disposed within the fuel container 10, and require connections with part to be located outside the fuel container. The joining of the retaining cap 16, with the support 12, of the fuel container 10, takes place in the exemplary embodiment in FIGS. 1 and 2, by a ring 20, of two parts, whose parts in the main halves 20a, 20b, are connectable to each other by a hook connection 22 which facilitates a tilting movement, and by means of a screw bolt 24, with nut 25, displaced 180 degrees, with respect to the snap connection, thus leaving the two parts taut with each other. Fig. 1, allows to recognize that the profile of the tensioning ring 20, widens somewhat from the outside inwards, and is inclined with the edge area 26, of the retaining cover 16, which acts together with the tension ring, so that by pulling the thread connection 24, 25, a force component essentially running parallel to the support shaft 12 becomes effective, whereby the retaining cap 16, the limiting surface 26, is pressed by the front side of the support 12, which has to stiffen and increase the limiting surface 28, on the front side, an edge 29, which projects outwardly in the form of a flange. The support 12, is provided on the opposite side with a peripheral groove 30, whose cross section narrows uniformly from the front side of the boundary surface 28, in the direction of the deepest of the groove. The slot 30 serves to receive a sealing ring 34, whose measurements in the cross section are chosen in relation to the depth of the slot 30, so that the sealing ring on the one hand in an effortless state, protrudes somewhat upwards on the limiting surface 28, of the front side, as shown in Fig. 2, where however, on the other hand the cross section of the sealing ring 34, is not greater than ei of the slot 30, of Thus, in the operating position of the parts shown in FIG. 1, in which the retaining cap 16 rests on the limiting surface of the front side 28, or of the support 12, the sealing ring 34, received entirely by the groove 30. The cross section of the groove may be somewhat larger than that of the sealing ring 34, which is important, is that the sealing ring when putting the retaining cap 16, seating it on the super For the purpose of limiting the front side 8, it receives an elastic deformation and with this, it is tensioned, which suffices to provide a seal that satisfies all the requirements of practical operation. On the other hand, the elastic deformation experienced by the sealing ring 34, by the retaining cap 16, placed on the limiting surface by the front side 28, of the support 12, so small that a negligible force transmission can take place in weight, since the retaining cap 16, with its edge area sits flat on the limiting surface of the front side 28, of the support 12. In this arrangement, the sealing ring 34, is no part of the carrier structure , this is the load receptor of the connection between the support 12 and the retaining lid 16. The embodiment according to Fig. 4, consists of what refers to the basic arrangement of the essential parts with the embodiment according to Figs. 1-3, so that for the same parts similar numbers are placed, although in Fig. 4, increased by 100.

In the embodiment according to FIG. 4, fixing of the retaining cap 116 takes place, or by means of a pressure ring 136, which in its outer edge region is provided with extensions 138, which act together with a ring d? retainer 140, which is fixed on the outside next to the support 112, the pressure or grip ring 136, and the ring 140, act together in the usual manner in the form of a bayonet lock. The extensions 138 of the pressure ring are brought into engagement with the guide surface 142, of the corresponding retaining section 144, in the retaining ring 140, where, by reason of a corresponding inclination of the surfaces, a pivoting movement takes place. of guide 142, in the peripheral direction when the rotational movement is applied, the fitting or joining of the parts acting together takes place. The turning movement can be carried out by a suitable tool for the application of which openings 146 are provided. Another difference with respect to the embodiment according to Figs. 1-3, consists in that the groove 130, has been placed for the sealing ring 134, in the retaining cap 116, in general, the conditions already mentioned depend on the embodiment according to Figs. 1-3, so that here also the edge area of the lid 116, is directly pushed to the limiting surface 126, by the front side of the support 112, and the sealing ring is not any part of the carrier structure of the Union. Also for this embodiment, it is valid as for the other embodiments, that this allows a rapid fabrication of a simple connection between the fuel container and the retaining cap, which on the one hand remains effective for a long period of time, and on the other hand , in case of need, for example, in a repair it is quickly dismantled and reassembled. L »orm» tiß r »? Iaiaciíán, according to Fig. 5, consists in general, in parts that essentially coincide with those of Fig. 1, so that similar parts are provided with equal figures, but increased with 200. A difference is that the sealing ring 264, in the embodiment according to FIG. 5, is arranged in a slot 230, on the front side of the support 212, here it could be analogous to the embodiment according to FIG. Fig. 4, the sealing ring in the sealing cap 216 is arranged, as in the embodiment 3 According to FIG. 4, the slot could be arranged for the sealing ring of the front surface of the support. In many cases, it is preferable to fix the groove for the sealing ring in the support of the fuel container, since the support, if it is not so, must have a certain minimum thickness in order to achieve a sufficient stiffness, while providing In the case of the retention cover, it may be necessary under certain circumstances to make the cover at least in the area where the groove is applied thicker than would be necessary if there were no groove. Another difference, between the two embodiments, consists in that, according to FIG. 5, it additionally has an adjusting ring 246, which surrounds the support 212 on the outside and grabs its outer edge 229, which has the shape of flange. This specially manufactured and also divided, or otherwise suitable, fitting ring can be made, since it can be flexed with one another to drive on the support 212, it serves only to simplify the molding of the retaining ring 140, for the closure of bayonet. Fig. 4 shows that the adjustment of the retaining ring 140, to the external profile of the support 112. requires several molding processes that are relatively complicated, precisely the adjustment ring 248 must, divided due to its limitation by the inner side adjusting also to the profile of the external side of the support 212. This does not require, however, during the manufacture of the ring 248, any greater problem, for example a manufacture of injection casting.; on the other hand, the adjusting ring 248 can be limited in such a way on the outer side that it is essentially flat, and therefore requires only a small molding effort for the retaining ring 240, which in its opposite side to the body of the fuel container 210, can be provided with a flange 250, arched inwardly. This flange grasps the adjusting ring 248 underneath, so that the ring 240 is joined in a closure by the shapes with the adjusting ring 248. This will be constructed in an L-shape, in the cross section, where the branch 252 , of the adjusting ring that secures behind the flange-shaped edge 229, of the support 214, causes an effective closing between the adjusting ring and the support, so that the ring 240, despite the failure of an direct contact with the support 214, in any case can be maintained in its operating position. The use of such an adjustment ring 248 depends on whether its manufacture or if its use is combined with a retaining ring, which, as seen in accordance with FIG. 4, must undergo several molding steps. The adjusting ring is preferably manufactured to achieve the intended purpose, of a synthetic material, which is harder than the synthetic material of which the fuel container consists. The pressure ring 236 is provided for securing it with projection 254, in the grip position with the extensions 236, projections which, at the end of their turning movement, cause the fixed connection between the retaining cover 216, and the container. of fuel 210, which grip in corresponding recesses in the retaining ring 240, and thereby provide a closure in an additional manner which can only be removed, with the application of a minimum force acting against the pivoting movement that produced the connection, such outgoing and recesses can be provided as is understood without further ado, also in the example of embodiment of Fig. 4. In the embodiment according to Fig. or, there are those parts that coincide with the embodiment according to Fig. 1, marked with the same figures, but now increased by 300. Here the connection between the retaining cap 216 and the support 312 of the fuel container 310 is manufactured by means of a nut plug 256, which is screwed on a thread 258, which is formed and arranged on the outer side of the support 312, and in a similar manner to the adjusting ring 248, of the embodiment according to Fig. 5. The branch 352, of the screw ring grasps the outer edge 629, in the form of flange of the support 312, which is provided on the front side with the slot 330, which accepts the sealing ring 334. The threaded ring 358, is also constructed, divided so that something can be arched to be able to drive on the support 312, and bring it to the operating position shown in Fig. 6. The threaded ring 358, and the cap nut 356, can be made of a synthetic material, but in any case, which should be harder than the synthetic material from which the fuel container is manufactured 310.

Unlike the other embodiments, in embodiment according to Fig. 6, ae provides an approximately rectangular profile groove.

Claims (9)

1. CLAIMS 1.- Fuel container made especially of thermoplastic synthetic material that is determined to be installed in a motor vehicle with a support, which surrounds the container wall and has an opening, which is closed by a retaining cover provided for retention of for example ducts, pump, indicators of the state of filling with the intermediate placement of a sealing ring constructed as a ring or lining in a U-shape, and having fixing agents for the retaining lid, by means of which it receives an effort in the direction of the support, characterized in that the sealing ring is arranged in a groove in the support or in the retaining cover, and the cross section of the groove and sealing ring are selected in such a way that the cover In its operating position that closes the opening, it can rest directly on the front surface of the support
2. 2. Fuel container according to claim 1, characterized in that the cross section of the groove receiving the sealing ring narrows from its open side to the deepest of the groove, preferably uniformly.
3. 3. Fuel container according to claim 1, characterized in that the fixing agent that secures the retaining cap in its position, is conatruded as a tension ring, which grabs an outwardly directed edge projection from behind. and in the form of a flange belonging to the support and holding the retaining cap on its upper edge and forcing it towards the front surface of the support.
4. 4. Fuel container according to claim 3, characterized in that the tension ring presents in the transverse section a profile that widens from outside inwards and the surfaces that act together with the tension ring and belong to the support and / or the retaining cap are formed and adjusted accordingly.
5. 5. Fuel container according to claim 1, characterized in that a preferably metallic retaining ring is applied to the support with which a pressure ring acts, which is inserted into the retaining ring in the axially essential part and with respect to this it is rotatable and the pressure ring in its active position grasps the retaining cap by an edge and presses it in the direction of the front surface of the support.
6. 6. Fuel container according to claim 5, characterized in that the support is surrounded by a divided adjustment ring, which with its projection directed inwards grabs behind an outer edge 259, in the form of flange of the support and furthermore carries the retaining ring.
7. 7. Fuel container according to claim 1, characterized in that the support is provided on the outside with a thread on which a cap nut is screwed, of which an edge area cicada by SU ßor ea the cover of retention and press it in the direction of the front side of the support.
8. 8.- Fuel tank of. according to claim 7, characterized in that the thread that receives the cap nut, is made at the outer periphery of the support with a specially divided screw ring, which with a projection directed inward grabs behind an outer edge in the form of a flange of the support.
9. 9. Fuel container according to one of the preceding claims, characterized in that the support, the retaining cover, as well as at least some of the parts that work together, are provided with agents that cause a form closure causing a certain placement of the retaining cap, with respect to its angular position in the peripheral direction. RE S UM E N The present invention features a fuel container, consisting of thermoplastic synthetic material, which is intended to be installed in a motor vehicle, with a support enclosing it surrounding an opening in the wall of the container, which is closed by a retaining lid, with the intermediate placement of a sealing ring. The connection between the support and the retaining cap is caused by a fixing means, which forces the retaining cap in the direction of the support. Here the sealing ring is arranged in its groove in the support or in the retaining cap. The cross section of the groove and the sealing ring are selected in such a way that the retaining cover in its operating position, by closing the opening in the front surface of the support, is directly supported by it. In this way, the sealing ring is prevented from being a constructive part of the connection between the support and the retaining cover.