DE2701940A1 - COMPONENTS FOR VACUUM NON-RETURN VALVES - Google Patents

Description

DipWng. E. Tergau

Patent attorney

_ 3 - Nuremberg, the

27Ü1940

Walter Alfmeier GmbH + Co, 88 30 Treuohtlinyen

Components for vacuum check valves

The invention relates to components made of plastic for vacuum check valves, which valves consist of a housing part, valve internals and a cap part, and the housing part and the cap part respectively are equipped with at least one connection piece and can be welded to one another.

Plastic vacuum check valves that consist of the components mentioned are already known. They are, for example, in the German Auslegeschrift 23 15 870. From this interpretation it can also be seen that such valves, especially when Automotive are used and there for the connection of servo units operated with negative pressure to the suction side of the internal combustion engine.

In the manufacture of such valves, there is the problem that, depending on the application and size, different designs are needed. As a result, the valve manufacturer offers a wide range of valve shapes

809829/0460

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must provide, which is often only slightly, for example in shape and size of the connecting piece, but often also differ considerably from one another. In any case it is required to produce each of these valves separately, which naturally leads to a considerable increase in the price, since A corresponding range of injection molds, measuring gauges as well as testing and assembly devices are available must stand.

The invention is based on the task of rationalizing the manufacture of such valves and making them cheaper, without having to reduce the number of valves at the same time.

According to the invention this object is achieved in that several housing parts and several cap parts, regardless of their size and structure, coincide with one another Get matching abutment surfaces so that each housing part can be combined and welded with each cap part can. A system of housing and cap parts is created which, despite all the variety of shapes, Types and dimensions match in any case in the abutment surfaces, which makes it possible, for example, by combining five housing parts and eight cap parts a production of 5 + 8 = 13 individual parts, in total 5 χ 8 = 40 valve types. By optimally adapting the components mentioned to the known uses can be achieved with the specified number of individual

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parts already get by and thus with a noticeably reduced number of individual parts, the entire diversity of market needs cover.

To ensure that the matching abutment surfaces of the housing and cap parts can be manufactured without any problems Valve can be combined, it is necessary to ensure a secure and precise fit. Naturally the tried and tested methods and forms of snug fit are used for this purpose. It is therefore suggested also under of the specified system to use V-shaped abutting surfaces of the housing and cap part and additionally for this Care must be taken that in one of the two parts in the immediate vicinity of the front edge of the one to be used the other part and sufficiently far away from the valve internals an annular groove for the reception of the Welding process extruded plastic is arranged. This ensures that plastic droplets or particles, the formation and detachment of which cannot be avoided with correct welding, taken up and can be deposited in an area that does not impair the function of the valve.

Both the housing part and the cap part of the valve each have connecting pieces for the required

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ORIGINAL INSPECTED

chen hoses on. These connecting pieces are arranged in a known manner with several one behind the other Annular beads equipped, which have the purpose of the hoses to hold onto it after it has been pushed on, even without using hose clamps. The beads are preferred designed so that they each recede from the component body to the front edge of the nozzle. To this Way, it is possible to push even relatively inelastic thick-walled hoses securely onto the connecting piece, whereby the beads dig one after the other into the inner wall of the hose and adhere firmly there.

It is possible within the proposed system individual cap and / or housing parts in the area of their component bodies or their connecting pieces with others Equip branch nozzles to which further branch hose lines can be connected. Using Such components result in combined valve and distributor pieces that require the use of additional special distributors make superfluous. The proposed component system is capable of diverse applications and can depending on can be expanded or restricted as required according to the respective requirements. It contributes to the economy to increase valve production and at the same time for larger ones by normalizing the individual elements

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27U194Q

To ensure security.

The subject matter of the invention is described below with reference to the attached Drawing explained in more detail. They represent:

1 shows an overview table of an advantageous system of components,

Fig. 2 shows a longitudinal section through a vacuum check valve which, using the invention, one on top of the other Matched components has been assembled.

The system shown in Fig. 1 consists of a total of five embodiments of housing parts 1, which are in the upper horizontal column are entered and a total of eight cap parts 2 in the left vertical column are registered. It can be seen that both the housing parts and the cap parts are each different strong connection piece 3, as well as equipped with differently shaped and dimensioned component bodies 4 are. It is essential that the abutment surfaces 5 correspond to each other, so that each housing part 1 with each Cap part 2 can be combined and welded. If this happens, that which can be seen in FIG. 1 arises Variety of combination valves, with which practically every requirement can be covered.

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Fig. 2 shows the structure of such a combination valve can be seen in more detail. In the chosen embodiment, a housing part 1 is combined with a cap part 2, the latter also having two branch nozzles 6; 6 ', the branch nozzle 6 is attached directly to the structural part 2 (cap part) and the branch nozzle 6 ¹ to the connecting piece 3. Both branch nozzles are used to connect further hose lines and make an additional branch piece superfluous.

The abutting surfaces 5 of the housing and cap part are shown in FIG Embodiment arranged in a V-shape, so that a secure connection with simultaneous centering of the two parts 1 and 2 is possible. One of the two parts, in the illustrated embodiment the housing part 1 also has an annular groove 7, which is in the immediate vicinity of the front edge 8 of the cap part 2 and is arranged sufficiently far away from the internal valve components 9. Will be used when welding the two Parts 1 and 2 pressed a small amount of plastic out of the welding gap, so there is the possibility of the this is taken up by the annular groove 7 and held (by baking), so that this is undesirable in itself Particles are trapped in one area of the valve by not interfering.

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27Ü 19A0

Fig. 2 further shows that the connecting pieces 3 of the housing and cap part each from the component body have bulges 10 receding towards the front edge. To show the receding arrangement, the sharp ones are Edges of these ridges are connected by lines 11 which slightly converge towards one another.

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Claims (4)

Nuremberg, the I Ü. '· ...-. VIt) Walter Alfmeier GmbH + Co, 8830 Treuchtlingen Claims _v 1 consisting of plastic components for vacuum check valves with the housing part, the valve internals and cap portion, the body portion and cap portion, respectively least equipped with little a connection piece and are welded together, characterized in that a plurality of housing parts (1) and a plurality of cap parts (2) independently in terms of their size and structure , they have matching abutting surfaces (5), so that each housing part (1) can be combined and welded with each cap part (2). 2. Components according to claim 1, characterized in that the coordinated abutment surfaces of the housing and cap part are V-shaped and that in one of the two parts in the immediate vicinity of the front edge (8) of the other part and sufficiently far away from the valve internals ( 9) an annular groove (7) is arranged for receiving plastic pressed out during the welding process . 80982 a / 0460 DbUO Nun.Ltiy 11 Telephone (0911) lelex telegrams Bayer. Vereinsbank Stddttpaikaiü Deutsche Buik K. »ι · -. l.nlk, .i.io QRrGHNAL INSPECTED 27ü 1940 3. Components according to claim 1, characterized in that the connecting pieces (3) of the housing and cap parts each have receding beads (10) from the component body to the end edge. 4. Components according to claim 1, characterized in that the cap and / or housing parts in the region of their
Component body (4) and / or its connecting piece (3)
have further branch nozzles (6; 6 '). 9 29/0460