EP2010779B1 - Device for securing high-pressure lines to a high pressure accumulator - Google Patents

Abstract

The invention relates to a device for connecting a high-pressure line to a tubular high-pressure reservoir in the wall of which at least one connecting bore for the high-pressure line is configured. An end of the high-pressure line is covered by a half-shell of a shell-type securing device. The shell-type securing device encloses a peripheral surface of the high-pressure reservoir, the half-shells being braced against each other.

Description

State of the art

DE 199 48 341 A1 also relates to a high-pressure fuel storage, which is used in particular for a common rail fuel injection system of an internal combustion engine. The high-pressure fuel storage comprises a tubular body, which is equipped with a plurality of connection openings. In order to increase the pressure level which can be applied to the high-pressure fuel accumulator, at least two connection openings are arranged diametrically opposite one another in the tubular base body. Furthermore, located in the wall of the DE 199 48 341 A1 known high-pressure fuel storage processing openings, which are each closed by plugs.

DE 199 48 338 A1 has a method for processing a high-pressure fuel storage, a high-pressure fuel storage and a connecting piece for applying the method to the subject. The high-pressure fuel storage comprises a base body which is equipped with a plurality of connection openings. The region of the connection openings of the main body of the high-pressure fuel accumulator, to which high-pressure lines for the individual system-pressure fuel injectors are connected, has through-holes formed in the wall, which have two sections with different inner diameters. To connect the high-pressure lines, which extend to the individual fuel injectors, fittings are screwed into the wall of the main body of the high-pressure fuel accumulator, which in turn have an internal thread for receiving a complementarily formed connection end of a fuel injector extending high-pressure line.

From the JP 10-299610 A a device for connecting a high-pressure line to a tubular high-pressure storage body is known, in whose wall at least one connecting hole for the high pressure line is formed, wherein one end of the high pressure line is overlapped by a half-shell of the high pressure storage body enclosing cup-shaped attachment, wherein the shells are braced against each other.

The known from the prior art high-pressure fuel storage are mainly designed as forged components and made of one piece. The forging blanks are usually provided with the connection holes by machining and equipped with the fittings required for connecting the high-pressure lines. High-pressure fuel storage are also designed as multi-part, welded components, which include a corresponding number welded individual parts, such as the aforementioned fittings and tabs, such a welded high-pressure fuel storage is secured by means of the tabs in the cylinder head portion of the internal combustion engine.

Both high-pressure fuel accumulators designed as forging components and welded high-pressure accumulators consisting of several individual components require a rather high manufacturing outlay.

Disclosure of the invention

In view of the above-outlined solutions of the prior art, the object of the invention is to provide a high-pressure accumulator, in particular for high-pressure accumulator injection systems (common rail), whose manufacturing and assembly costs are considerably simplified and in which the seal between a respective fuel injector extending High pressure line and the corresponding connection hole in the high-pressure accumulator can be achieved during assembly.

According to the invention this object is achieved in that the periphery of the high-pressure accumulator body in the region of the connecting holes for the high-pressure lines leading to the fuel injectors cup-shaped attachments are assigned, which engage over the high pressure lines in an upset region and press in a Anstellbereich the peripheral surface of the high-pressure accumulator body. The cup-shaped attachment preferably comprises two at one end nestable half-shells, which are braced against each other at the other end either by means of a clamping element on the circumference of the high-pressure storage body, or attached via the formation of an attack between the open ends of the two half-shells under pretension on the circumference of the high-pressure storage body become. The cup-shaped attachment acts as a surrounding the circumference of the high-pressure accumulator body clamp, which is applied directly to the lateral surface of the high-pressure accumulator body and generates the sealing force between the connection bore in the wall of the high-pressure accumulator body and the upset at the end of the high-pressure line. The solution proposed according to the invention avoids the use of fittings that are used today, which are generally connected in a materially bonded manner to the peripheral surface of the high-pressure reservoir body. Preferably, the two half-shells of the cup-shaped attachment are formed as sheet metal fittings, which has a favorable influence on the production costs.

The high-pressure storage body comprises a simple tube in which a number of connection bores are introduced, wherein the number of connection bores introduced into the wall of the high-pressure reservoir body corresponds to the number of fuel injectors of the internal combustion engine to be supplied with fuel. If necessary, fastening tabs for fixing the high-pressure accumulator body in the cylinder head region of the internal combustion engine can be welded to the drawn, simply formed tube, which essentially represents the high-pressure accumulator body. The striking, fastening and sealing between the fuel injectors extending high pressure lines takes place during assembly of the cup-shaped attachment. About the inventively proposed solution, it is possible to connect the high-pressure lines to the individual under system pressure, to be supplied with fuel fuel injectors without lateral force and sealed on the high pressure storage body.

In mounting technology particularly simple manner, the two half-shells of the cup-shaped attachment at one end are interlocked. It is possible, the half-shell of the cup-shaped attachment, which closes the upset at the end of the high-pressure line to the fuel injector, and thus form directly at the end of the high pressure storage body to be fixed to the lateral surface of the high pressure storage. Preferably, that of the half-shells, which surrounds the upset at the end of the high pressure line, secured against rotation by means of a fixation to the lateral surface of the high-pressure accumulator body, so that no final force on the high-pressure line to the fuel injector during final assembly especially when generating the clamping force acts. In addition to a pre-assembly of those of the half-shells, which overlaps the upset of the high-pressure line, this half-shell can also be provided as a separate component with an insertion slot to be mounted as a single part in the assembly of the high pressure line in the region of the connection bore on the high-pressure storage body. For reasons of strength, the half-shell preassembled on the high pressure line is the cheaper option. In the half-shell, which overlaps the upset at the end of the high-pressure line, a spacer or a spacer ring is preferably installed with a collar-shaped projection. By means of the spacer ring or the spacer with collar-shaped approach manufacturing inaccuracies can be compensated and compensated for acting on the seal between the upset in corresponding geometry surface acting on the lateral surface of the high pressure storage body forces and in particular evenly distributed on the sealing circumference.

The clamping force at the open end between the two half-shells for fixing the cup-shaped attachment of a lateral surface of the high-pressure storage body can on the one hand be produced by a screw connection and on the other hand be brought about by a deformation between the open ends of the two half-shells to secure the sealing stress. If a clamping screw is used as the clamping element in the context of a screw connection, this can be preloaded on the one hand with a corresponding nut, on the other hand, for example in the lower of the two half-shells by a material deformation an accumulation of material can be formed, in which an internal thread is generated. The helical clamping element can then be screwed, dispensing with a separate nut with the lower of the two half-shells. Furthermore, at the lower of the two half shells, a threaded collar can also be produced by deformation, into which the helically shaped clamping element can be screwed in to produce a clamping force.

When forming a deformation of the two open ends of the half-shells of the cup-shaped attachment to the lateral surface of the high-pressure storage body, this clamping force introduction point is preferably formed so that overlap the two open ends of the half-shells at this clamping force introduction point. As a result, the play at the point of introduction of the clamping force into the fastening, at which the two half shells are first inserted into one another or hooked together, is pushed out of the connection, resulting in a tight fit of the cup-shaped fastening on the lateral surface of the high-pressure accumulator body.

In order to ensure a lateral force-free consolidation of the high-pressure lines on the lateral surface of the high-pressure accumulator even when mounting the cup-shaped attachment to the lateral surface of the high-pressure accumulator body, a recess is preferably produced on the lateral surface of the high-pressure accumulator body. This recess cooperates with a projection formed on either the upper half shell or the lower half shell. The combination of a formed on one of the half-shell projection with the recess on the lateral surface of the high pressure storage body causes a Verdrehfixierung the cup-shaped attachment during assembly to the outer surface and the high-pressure storage body and in particular when generating the bias, either by a screw connection, be it by a Deformation of the still open ends of the two mutually to be biased half shells.

drawing

Reference to the drawings, the invention is described in detail after standing.

Figur 1

eine Draufsicht auf eine erste Ausführungsvariante einer schalenförmigen Befestigung für eine Hochdruckleitung an der Mantelfläche eines Hochdruckspeicherkörpers,

Figur 2

einen Querschnitt durch die in Figur 1 dargestellte Ausführungsvariante einer schalenförmigen Befestigung für eine Hochdruckleitung an der Mantelfläche eines Hochdruckspeicherkörpers,

Figur 3

eine Unteransicht der in den Figuren 1 und 2 dargestellten ersten Ausführungsvariante der schalenförmigen Befestigung einer Hochdruckleitung an der Mantelfläche eines Hochdruckspeicherkörpers,

Figur 4

einen Schnitt durch eine weitere Ausführungsvariante einer schalenförmigen Befestigung einer Hochdruckleitung an der Mantelfläche eines Hochdruckspeicherkörpers,

Figur 5

eine Unteransicht der in Figur 4 dargestellten zweiten Ausführungsvariante der schalenförmigen Befestigung einer Hochdruckleitung,

Figur 5.1

eine Seitenansicht der in Figur 5 dargestellten zweiten Ausführungsvariante der schalenförmigen Befestigung,

Figur 6

eine Ansicht der zweiten Ausführungsvariante der schalenförmigen Befestigung von der Oberseite,

Figur 7

eine weitere, dritte Ausführungsvariante einer schalenförmigen Befestigung einer Hochdruckleitung an der Mantelfläche eines Hochdruckspeicherkörpers mit einer durch Deformation der offenen Halbschalenenden erzeugten Klemmkrafteinleitungsstelle,

Figur 8

eine fertig ausgebildete Klemmkraft-Einleitungsstelle gemäß der in Figur 7 dargestellten dritten Ausführungsvariante der schalenförmigen Befestigung,

Figur 9

eine Draufsicht auf die in Figur 7 dargestellte weitere dritte Ausführungsvariante der schalenförmigen Befestigung,

Figur 10

eine weitere, vierte Ausführungsvariante der schalenförmigen Befestigung zwischen einer Hochdruckleitung und der Mantelfläche eines Hochdruckspeicherkörpers und

Figur 11

eine Seitenansicht der in Figur 10 dargestellten weiteren, vierten Ausführungsvariante der schalenförmigen Befestigung zwischen der Hochdruckleitung und dem rohrförmig ausgeführten Hochdruckspeicherkörper,

Figur 12

eine Draufsicht auf die in Figur 10 dargestellte vierte Ausführungsvariante der schalenförmigen Befestigung,

Figur 13

eine weitere Ausführungsvariante der schalenförmigen Befestigung in Schnittdarstellung,

Figur 13.1

eine Seitenansicht der in Figur 13 dargestellten Ausführungsvariante mit oberhalb der Symmetrieachse angeordnetem Übergriff,

Figur13.2

eine Draufsicht auf die in Figur 13 dargestellte Ausführungsvariante und

Figuren 14.2 und 14.2

eine weitere Ausführungsvariante mit axial zueinander verschieb- und verrastbaren Schalen einer schalfenförmigen Befestigung.

It shows:

FIG. 1

a top view of a first embodiment of a cup-shaped attachment for a high-pressure line on the lateral surface of a high pressure storage body,

FIG. 2

a cross section through the in FIG. 1 illustrated embodiment of a cup-shaped attachment for a high-pressure line on the lateral surface of a high pressure storage body,

FIG. 3

a bottom view of the in the Figures 1 and 2 illustrated first embodiment of the cup-shaped attachment of a high-pressure line to the lateral surface of a high pressure storage body,

FIG. 4

a section through a further embodiment of a cup-shaped attachment of a high-pressure line to the lateral surface of a high pressure storage body,

FIG. 5

a bottom view of in FIG. 4 illustrated second embodiment of the cup-shaped attachment of a high-pressure line,

Figure 5.1

a side view of in FIG. 5 illustrated second embodiment of the cup-shaped attachment,

FIG. 6

a view of the second embodiment of the cup-shaped attachment from the top,

FIG. 7

a further, third embodiment variant of a cup-shaped attachment of a high-pressure line to the lateral surface of a high-pressure reservoir body with a clamping force introduction point generated by deformation of the open half-shell ends,

FIG. 8

a completed clamping force introduction point according to the in FIG. 7 illustrated third embodiment of the cup-shaped attachment,

FIG. 9

a top view of the in FIG. 7 illustrated further third embodiment of the cup-shaped attachment,

FIG. 10

a further, fourth embodiment of the cup-shaped attachment between a high-pressure line and the lateral surface of a high pressure storage body and

FIG. 11

a side view of in FIG. 10 illustrated further, fourth embodiment of the cup-shaped attachment between the high pressure line and the tubular high-pressure storage body,

FIG. 12

a top view of the in FIG. 10 illustrated fourth embodiment of the cup-shaped attachment,

FIG. 13

a further embodiment of the cup-shaped attachment in a sectional view,

FIG. 13.1

a side view of in FIG. 13 embodiment shown with arranged above the axis of symmetry attack,

Figur13.2

a top view of the in FIG. 13 illustrated embodiment and

FIGS. 14.2 and 14.2

a further embodiment with axially displaceable and lockable shells of a cup-shaped attachment.

variants

Representation according to FIG. 1 is a first embodiment of a cup-shaped attachment of a high-pressure line on the lateral surface of a high-pressure accumulator body to be seen from above.

Hereinafter, a cup-shaped attachment 20 will be described, which has an upper shell 22 and a lower shell 24. The upper shell 22 and the lower shell 24 are designed to be complementary to each other, so that the upper or the lower shell 22, 24 enclose a lateral surface of a tubular high-pressure storage body 10 at an angle of 180 °. The term "half-shells" is understood below to mean that the cup-shaped attachment 20 comprises two shell-shaped components which enclose the tube-shaped high-pressure storage body 10 also in larger or smaller wrap angles 98 and 100. In the assembled state, the cup-shaped attachment 20 encloses a lateral surface 12 of the tubular high-pressure storage body 10, preferably along the entire circumference, apart from the connection point to a high pressure line 16. Thus, for example, the half shells be designed so that the upper shell 22 encloses a lateral surface 12 of the high-pressure storage body 10 at a greater angle than 180 ° and the lower shell 24th Consequently, the lateral surface 12 of the high-pressure accumulator body 10 encloses at a smaller angle than 180 °. Of course, the dimensions in terms of the enclosure angle of the half-shells 22, 24 of the cup-shaped attachment 20 may also be formed vice versa.

A high-pressure storage body 10, which is substantially tubular, has a lateral surface 12. The high-pressure accumulator body 10 is formed in a wall thickness which withstands a loading of the high-pressure accumulator body 10 with a system pressure between 1600 and 2000 bar. The system pressure is generated in the high-pressure storage body 10 by a high-pressure delivery unit, such as a high-pressure pump, which is not shown in the drawings described below. The high-pressure storage body 10 is formed symmetrically to its axis of symmetry 14. On the lateral surface 12 of the high-pressure accumulator body 10, a high-pressure line 16 shown in section is received, which has a flow cross-section 18 and to a in FIG. 1 not shown fuel injector runs. By the high pressure line 16 of stockpiled in the cavity of the high-pressure accumulator body 10, under system pressure standing fuel is fed to the fuel injector. In the FIG. 1 High pressure line 16 shown in section is fastened by means of a cup-shaped attachment 20 on the lateral surface 12 of the high-pressure storage body 10. The cup-shaped attachment 20 comprises an upper shell 22 and a lower shell 24, which are formed substantially semicircular. In the in FIG. 1 Through the slot-shaped recess 26 of the upper shell 22 is ensured that the upper shell 22 during assembly as a separate component via an in. In the first embodiment of the cup-shaped attachment 20 extends in the upper shell 22 a slot-shaped recess FIG. 1 not shown upset 44 (see illustration according to FIG. 2 ) can be pushed, ie this overlaps. A first connection of the upper shell 22 to the lower shell 24 is given by a clamp 30, on which the upper shell 22 is suspended in the lower shell 24. Opposite the clamp 30 is a clamping element 28, for example designed as a screw, via which the upper shell 22 and the lower shell 24 of the cup-shaped attachment 20 can be biased against one another. The upper shell 22 may be part of the high pressure line 16, thus be preassembled with this. In this case, eliminates the formation of the slot-shaped recess 26 on the upper shell 22. The upper shell 22 of the cup-shaped attachment 20 may well represent a separate component, which is pushed with the slot-shaped recess 26 during assembly on the high-pressure storage body 10 via the aforementioned upsetting of the high-pressure line 16.

FIG. 2 shows a sectional view of in FIG. 1 illustrated first embodiment of a cup-shaped attachment of a high-pressure line 16 on the lateral surface of a high pressure storage body.

As shown in the illustration FIG. 2 can be removed, encloses a wall 40 of the high-pressure accumulator body 10 a cavity 38. The cavity 38 is pressurized with system pressure, said pressure level is in the range 1600-2000 bar. In the wall 40 of the high-pressure storage body 10, one of the fuel injectors to be connected to this number of connecting holes 42 are formed. How out FIG. 2 As can be seen, the connection holes 42 open into funnel-shaped configured surfaces 43. Instead of a funnel-shaped configuration, the surfaces 43 can also be formed hemispherical or in a different geometry.

On the lateral surface 12 of the high-pressure storage body 10, the cup-shaped attachment 20 is fixed, which comprises the upper shell 22 and the lower shell 24. The upper shell 22 and the lower shell 24 are hooked or hooked together at a first point of introduction 32 for introducing a clamping force F _K. This connection of the upper shell 22 with the lower shell 24 at the first discharge point 32 is done without tools. At the first introduction point 32 opposite the second introduction point 34 for introducing the clamping force F _K in the cup-shaped attachment 20, extending between the ends of the upper shell 22 and the lower shell 24 is a helically shaped clamping element 28. A threaded portion of the clamping element 28 is denoted by reference numeral 52nd denotes a nut, in which the clamping element 28 engages identified by reference numeral 50. Depending on the tightening torque of the clamping element 28, the upper shell 22 is clamped against the lower shell 24 of the cup-shaped attachment 20 about the lateral surface 12 of the high-pressure storage body 10. At the first introduction point 32, any play that may still be present is pushed out of the cup-shaped attachment 20. Depending on the defined tightening torque, with which the clamping element 28 is tightened, the upper shell 22 of the cup-shaped attachment 20 in the region of an opening formed in the upper shell 22 forms an annular gap 48 around a shoulder 54 above an upset 44. The upset 44 has in the in FIG. 2 illustrated embodiment a frustoconical appearance. The upset 44 is preferably made complementary to the geometry of the connection surface 43 into which the connection bore 42 terminates in the wall 40.

Depending on the remaining axial length of the free threaded portion 52 between the ends of the upper shell 22 and the lower shell 24, the clamping force F _K can be generated, wherein the introduced at the first introduction point 32 and at the second point of introduction 34 clamping force F _K preferably applied sealing force 36 (F _D ) corresponds. This ensures that a leakage-tight connection between the upset 44 and the formed in a complementary geometry to this connection surface 43 on the lateral surface 12 of the high-pressure accumulator body 10 is formed.

FIG. 3 shows the first embodiment of the cup-shaped attachment according to the invention from the bottom.

FIG. 3 can be removed that the clamping element 28 passes through the nut 50, whereby the lower shell 24 is attracted to the upper shell 22. When bracing the upper shell 22 against the lower shell 24 at the second force introduction point 34 32 any remaining game from the cup-shaped attachment 20 is pushed out at the first force introduction point.

FIG. 4 shows a second embodiment of the cup-shaped attachment, with which a high-pressure line is sealingly connected to the lateral surface of the high-pressure accumulator.

The in FIG. 4 can be removed, that the upper shell 22 and the lower shell 24 are connected to each other at the first introduction point 32 of the clamping force F _K by means of an overlap 60. In the in FIG. 4 In the embodiment shown, a bent end of the upper shell 22 engages over an extension of the lower shell 24 in the area of the first introduction point 32 of the clamping force F _K. At the second point of introduction 34 of the clamping force F _K , the open ends of the upper shell 22 and the lower shell 24 of the cup-shaped attachment 20 are screwed against each other via a clamping element 28. In this embodiment, in contrast to the illustration according to FIG. 2 the nut 50 dispensable, since the internal thread for the helical clamping element 28 formed in a material accumulation 66 is formed. The internal thread is identified by reference numeral 68. Unlike in FIG. 2 illustrated sectional view of the first embodiment of the cup-shaped attachment, the high-pressure line 16 a rounded formed upset 64, which is employed on the contact surface 43 above the connection bore 42 in the wall 40 of the high-pressure storage body 10. The wall 40 defines the cavity 38 of the high-pressure accumulator body 10, which is acted upon by a not shown high pressure pumping unit with a system pressure between 1600 and 2000 bar. The upper shell 22 includes the opening 46 through which the high pressure line 16 passes. The upper half-shell 22 is pushed over the high pressure line 16 prior to forming the rounded upset 64. The upper shell 22 rests on a shoulder 54 formed on the rounded upset 64, by means of which the sealing force between the high-pressure line 16 and the abutment surface 43 on the lateral surface 12 of the high-pressure reservoir body 10 during pretensioning of the upper shell 22 against the lower shell 24 is produced. The upper shell 22 may be provided with a flattening 62, which cooperates with a corresponding formed on the lateral surface 12 of the high-pressure accumulator body 10 flattening and thus represents an anti-rotation during assembly, so that the high-pressure line 16 can be mounted without lateral forces on the lateral surface 12 of the high-pressure accumulator body 10 ,

FIG. 5 shows the in FIG. 4 illustrated second embodiment of the tab-shaped attachment from the top.

FIG. 5 shows that the upper shell 22 surrounds the lower shell 24 in the region of the overlap 30. The high pressure line 16 is fixed to form an annular gap 48 between the upper shell 22 and the outer peripheral surface of the high pressure line 16. Due to the annular gap 48 is omitted an introduction of shear forces in the high-pressure line 16, which significantly increases their life. FIG. 5 is to be seen in plan view, the clamping element 28 which biases the upper shell 22 against the lower shell 24 in the region of the second force introduction point 34 for the clamping force F _K. For the sake of completeness, it is pointed out that the high-pressure accumulator body 10 is substantially tubular and extends symmetrically with respect to its axis of symmetry 14.

Figure 5.1 shows a side view of the handle, with the upper shell and the lower shell of the cup-shaped attachment according to FIG. 5 mesh.

From the side view according to Figure 5.1 it turns out that the encroachment 60, as in FIG. 5 represented in the region of the first introduction point 32 for the clamping force F _{K is made} without tools and formed by a positive connection between the open ends of the upper shell 22 and the lower shell 24. For orientation, the high-pressure line 16 is partially indicated on the upper shell 22.

FIG. 6 is the top view of the in FIG. 4 shown in section second embodiment of the cup-shaped attachment of the high-pressure line to remove the lateral surface of the high-pressure storage body.

From the illustration according to FIG. 6 shows that the upper shell 22 includes the aforementioned slot-shaped recess 26. The upper shell 22 can thereby be used as a separate component in the context of the formation of the high-pressure connection between the high-pressure line 16 and the high-pressure reservoir body 10. In this case, the slot-shaped recess 26 allows lateral sliding of the upper shell 22 on the in FIG. 4 As already mentioned, the upper shell 22 and the lower shell 24 of the cup-shaped attachment in the region of the first point of introduction 32 for the clamping force F _K are interlocked or interlocked with each other. The tension between the upper shell 22 and the lower shell 24 for fixing the cup-shaped attachment 20 on the lateral surface 12 of the high-pressure accumulator 10 is essentially defined by the tightening torque of the tensioning element 28. In the illustration according to FIG. 6 is indicated that the wall 40 of the high pressure storage body 10 encloses its cavity 38. Below the in FIG. 6 shown, indicated high-pressure line 16 is located in the wall 40 of the high-pressure accumulator body 10 in FIG. 4 shown in section connecting bore 42, which merges into the contact surface 43, here funnel-shaped.

FIG. 7 shows a further, third embodiment of the present invention proposed cup-shaped attachment of a high-pressure line to the lateral surface of the high pressure storage body.

According to the in FIG. 7 illustrated further third embodiment variant of the cup-shaped attachment 20, the lateral surface 12 of the high-pressure storage body 10 is enclosed by the upper shell 22 and the lower shell 24 in the region of the connection bore 42. In the illustration according to FIG. 7 is formed at the first introduction point 32 for the introduction of the clamping force F _{K of} the overlap 60, wherein forming a clamping element-free clamping 78, a cross-end 80 of the upper shell 22 encloses a cross-end 82 of the lower shell 24. The double arrow indicates that the position of the overlap 60 can be formed at arbitrary locations on the lateral surface 12, ie in any desired angular positions with respect to the axis of symmetry 14 of the high-pressure accumulator body 10. As shown in FIG. 7 At the first introduction point 32 of the clamping force F _K opposite the second introduction point 34, the open end of the upper shell 22 is moved in the direction of a deformation path 26 and finally the in FIG. 8 illustrated clamping element-free clamping 78 at the second point of introduction 34 of the clamping force F _K generated.

From the illustration according to FIG. 7 is also removable, that the upper shell 22 has a dome-shaped shoulder, which in the illustration according to FIG. 7 a spacer 72nd encloses. Instead of in FIG. 7 shown, formed without sleeve-shaped collar spacer 72 can here also in FIG. 10.1 shown spacer 92 are used with collar, which ensures that the high-pressure line 16 is fixed and free of transverse force load on the lateral surface 12 of the high-pressure accumulator body 10.

The in the illustration according to FIG. 7 reproduced spacer 72 rests on the shoulder 54 of the upset 74 of the high pressure line 16. The upset 74 has a conically contoured lateral surface, which is designed to be complementary to the funnel-shaped contact surface 43 in the wall 40 of the high-pressure accumulator body 10.

In addition, a projection 84 is formed on an inner side of the upper shell 22. The protrusion 84 projects into a recess 86 arranged in the lateral surface 12 of the high-pressure accumulator 10. The interaction of the projection 84 formed on the upper shell 22 with the recess 86 in the lateral surface 12 of the high-pressure reservoir body 10 ensures that the high-pressure reservoir body 10 corresponding to the deformation of the open end of the upper shell 22 in the formation of the clamping connection at the second introduction point 34 the deformation path 76 is not relatively rotated, which would lead to a transverse force stress of the high-pressure line 16. The high pressure line 16 is protected on the one hand by the spacer 72 and on the other hand by the annular gap 48 against the introduction of shear forces through the upper shell 22. Alternatively to in FIG. 7 shown spacer 72, the lateral surface of the high-pressure line 16 also from the in FIG. 10.1 shown in section spacer 92 may be enclosed with collar-shaped approach.

FIG. 8 shows the connection of the upper shell 22 with the lower shell 24 in the region of the second point of introduction of the clamping force.

Out FIG. 8 It is apparent that upon deformation of the upper end of the upper shell 22 in the direction of the deformation 76 - as in FIG. 7 shown - a clamping element-free clamping 78 is generated at the second point of introduction 34 of the clamping force F _K. Thereby any play from the cup-shaped attachment on the one hand may be pushed out 20 and on the other hand, reaches a fully circumferential contact of the inner sides of the upper shell 22 and lower shell 24 on the outer surface 12 of the high-pressure reservoir body 10 is still at the first introduction point 32 of the clamping force F _K.

FIG. 9 shows the in FIG. 7 illustrated third embodiment of the cup-shaped attachment of the high-pressure line to the lateral surface of the high pressure storage body in plan view.

By reference numeral 84, the position of the projection on the inside of the upper shell 22 is indicated, which acts in conjunction with the recess 86 on the lateral surface 12 of the high-pressure storage body 10 as rotation between the upper shell 22 and high-pressure storage body 10 during assembly. The upper shell 10 and the lower shell 22 (in FIG. 9 not shown) are represented by the overlap 60 as shown in FIG FIG. 7 in the region of the first introduction point 32 of the clamping force F _K connected to each other.

FIG. 10 shows a further, fourth embodiment variant of the cup-shaped attachment of the high-pressure line 16 on the lateral surface of the high-pressure accumulator body.

From the illustration according to FIG. 10 shows that in the region of the first introduction point 32 of the clamping force F _K, the open ends of the upper shell 22 and the lower shell 24 can also be positively interlocked, for example in the form of a dovetail guide. This results in a clamping element-free clamping connection 78 in the region of the first introduction point 32 of the clamping force. In the region in which the open ends of the upper shell 22 and the lower shell 24 are connected to each other in the region of the first introduction point 32, the protrusion 84 can be formed on the inner side facing the outer surface 12 of the high-pressure storage element 10, which projection is formed in the corresponding geometry Recess 86 of the lateral surface 12 of the high-pressure accumulator body 10 engages. This way is also in the in FIG. 10 illustrated embodiment, a relative movement between the tubular high-pressure accumulator body 10 and this enclosing cup-shaped attachment 20 excluded, so that a transverse force introduction into the high-pressure line 16 is omitted.

The upper shell 22 has a dome-shaped projection in the region in which the upper shell 22 engages over the upset 74 of the high-pressure line 16. There, the opening 46 is formed. Between the opening 46 and the lateral surface of the high pressure line 16, the annular gap 48 extends. Below the upper shell 22, a spacer 92 is arranged with a collar-shaped approach, which surrounds the high-pressure line 16. The spacer 72 is supported on the one hand on the shoulder 54 of the upset 74 with conical surface and on the other hand surrounded by the upper shell 22. The collar-shaped projection of the spacer 92 as shown in FIG FIG. 10.1 protects the outer peripheral surface of the high-pressure feed line 16 against the introduction of shear forces and makes the initiation more uniform the preload force. FIG. 10.1 In addition, it can be seen that the spacer disk 92 with collar-shaped projection has an inner diameter 94 which substantially corresponds to the outer diameter of the high-pressure line 16. In the illustration according to FIG. 10 is the upset 74, which has a frusto-conical surface, in the funnel-shaped configured pad 43 of the lateral surface 12 above the connection bore 42 of the wall 40 is pressed. This results in a leak-free connection between the cavity 38 of the high-pressure accumulator body 10, the connection bore 42 in the wall 12 of the high-pressure accumulator body 10 and the high-pressure line 16.

In the in FIG. 10 illustrated embodiment, the sealing force F _D (reference numeral 36) between the upper shell 22 and the lower shell 24 of the cup-shaped attachment 20 via the clamping element 28 is generated. Also in the in FIG. 10 represented further fourth variant of the cup-shaped attachment 20, for example, a threaded collar 90 can be formed in the lower shell 24 by the threaded portion 52 of the clamping element 28 is screwed. Preferably, the upper shell 22 is preassembled on the high pressure line 16, whereby the formation of a slot-shaped recess 26 in the upper shell 22, as in connection with the embodiments according to the FIGS. 1 and 6 represented, can be omitted.

While in the in FIG. 10 the further introduction of the clamping force F _K at the first introduction point 32 by the nested ends of the upper shell 22 and the lower shell 24, the clamping force F _K at the second point of introduction 24 by the clamping element 28th applied. Preferably, therefore, the introduction of the clamping force F _{K takes place} at two points on the lateral surface 12 of the high-pressure accumulator body 10. Preferably, F _D = 2 F _K.

In the FIG. 10 of the shell-shaped attachment 20 shown is characterized in that in the area of the first introduction point 32 of the clamping force F _{K is} the terminal connection 60 is not raised in the radial direction over the upper shell 22 and the lower shell 24 protrudes, as for example, when covering device 60 as shown in FIG. 7 or when attacking in the illustration according to FIG. 4 or at the in FIG. 2 illustrated embodiment of the case. This results in an additional space advantage, since the cup-shaped attachment 20 takes up only a little space in the region of the second point of introduction 34 of the clamping force F _K.

FIG. 11 shows a side view of in FIG. 10 shown, another fourth embodiment variant of the cup-shaped attachment of a high-pressure line 16 on the lateral surface of the high pressure storage body.

Out FIG. 11 shows that the ends of the upper shell 22 and the lower shell 24 can be inserted into each other and thus form a continuous, smooth outer surface of the cup-shaped attachment 20. On the upper shell 22 is in the embodiment according to FIG. 11 formed on the inside of the projection 84 which projects into a recess 86 in the lateral surface 12 of the high-pressure accumulator body 10 and thus a relative movement between the high-pressure accumulator body 10 and the cup-shaped attachment 20 in the formation of the connection of the high pressure line 16 on the high-pressure accumulator body 10 effectively prevented. The representation according to FIG. 12 is a side view of in FIG. 10 shown fourth embodiment of the high-pressure connection. From the illustration according to FIG. 11 shows that the projection 84 and the cooperating with this recess 86 on the lateral surface 12 of the high pressure storage body 10 above the axis of symmetry 14. Thus, the lower shell 24 engages around the lateral surface 12 of the high-pressure accumulator body 10 at a larger wrap angle than the upper shell 22.

FIG. 12 shows the top view of the in FIG. 10 shown in section fourth embodiment of the high pressure port. The spacer 92 and the underlying conical upset 74 are overlapped by the upper shell 22. Reference numeral 26 marks the mounting slot, which is designed as a slot-shaped recess.

FIG. 13 a further embodiment of the connection of a high-pressure connection to a high pressure storage body 10 can be seen. The representation according to FIG. 13 corresponds essentially to the illustration according to FIG. 10 , In contrast to the representation according to FIG. 10 is in FIG. 13 the wrap angle of the lower shell 24 identified by reference numeral 98. Complementing this wrap angle of the wrap angle of the upper shell 22 of the cup-shaped attachment 20 is formed smaller. From the sectional view according to FIG. 13 shows that the projection 84 on the inner surface of the upper shell 22 and the complementary formed to this recess 86 are formed on the lateral surface 12 of the high-pressure storage body 10 in the region of the overlap 60, see. also representation according to FIG. 13.1 , The lower shell 24, which is formed in a wrap angle of> 180 ° - see. Position 98 - is mounted on the lateral surface 12 of the high-pressure accumulator body 10. The upper shell 22 is pivoted by means of the mounting slot 96 in the lower shell 24, positioned by means of the anti-rotation 84, 86 and mounted in the lower shell 24.

The representation according to the FIGS. 14.1 and 14.2 is a further embodiment of the present invention proposed cup-shaped attachment.

From the illustration according to FIG. 14.1 shows that the upper shell 22 is formed in a wrap angle 100, which is smaller than 180 °. Corresponding thereto, the lower shell 24 of the cup-shaped attachment 20 in the wrap angle 98 is executed, which is greater than 180 °. In contrast to the half shells 22, 24 shown in the preceding embodiments, the half shells 22, 24 as shown in the FIGS. 14.1 and 14.2 in the joining direction 102 axially, that is displaceable parallel to the axis of symmetry 14 of the high-pressure accumulator body 10. First, the lower shell 24 is mounted on the lateral surface 12 of the high-pressure storage body 10 and axially displaced. Subsequently, the upper shell 22 is placed and positioned over the high-pressure line 16 relative to the high-pressure accumulator body 10. Thereafter, the lower shell 24 is suspended tangentially by a longitudinal displacement in the direction of the double arrow 102 via locking tongues in the upper shell 22. About the in FIG. 14.1 shown biasing element 28 is finally the sealing force F _D , with which the conical upset 74 is pressed into the lateral surface 12 of the high-pressure accumulator body 10 is generated.

Claims (9)

1. Device (20) for connecting a high-pressure line (16) to a tubular high-pressure accumulator body (10), in the wall (40) of which at least one connecting bore (42) for the high-pressure line (16) is formed, one end (44, 64, 74) of the high-pressure line (16) being surmounted by a half-shell (22, 24) of a shell-shaped fastening (20) surrounding the high-pressure accumulator body (10), the shells (22, 24) being braced with respect to one another, characterized in that the shell-shaped fastening (20) comprises an upper shell (22) and a lower shell (24) which are hooked together with one another, suspended one in the other or inserted one into the other at a first introduction point (32) for a clamping force F_k.
2. Device according to Claim 1, characterized in that the half-shells (22, 24) are braced with respect to one another at a second introduction point (34) for a clamping force F_K by means of a tension element (28) or are braced on a surface area (12) of the high-pressure accumulator body (10) via a clamping (78) which is free of tension elements.
3. Device according to Claim 1, characterized in that a surface area (12) of the high-pressure accumulator body (10) has at least one recess (86), into which at least one projection (84) formed on one of the half-shells (22, 24) engages as an anti-twist device.
4. Device according to Claim 3, characterized in that the at least one recess (86) of the high-pressure accumulator body (10) and the at least one projection (84) formed on one of the half-shells (22, 24) form an anti-twist device in any circumferential angle position with respect to the high-pressure accumulator body (10).
5. Device according to one of the preceding claims, characterized in that the first force introduction point (32) for the clamping force F_K is designed as a surmount (60) at which a surmounting end (80) on one of the half-shells (22, 24) surrounds a surmounted end (82) of one of the two half-shells (22, 24).
6. Device according to Claim 1, characterized in that the end of the high-pressure line (16) is designed as an upset (44), as a rounded upset (64) or as a frustonical upset (74).
7. Device according to Claim 6, characterized in that the end (44, 64, 74) of the high-pressure line (16) has a shoulder (54) at which the sealing force F_D of the shell-shaped fastening (20) is introduced into the high-pressure line (16).
8. Device according to Claim 7, characterized in that a spacer washer (72) or a spacer washer (92) having a collar-shaped extension is received above the end (44, 64, 74) of the high-pressure line (16).
9. Device according to Claim 2, characterized in that the tension element (28) of the second introduction point (34) of the clamping force F_K is screwed into a threaded collar (90) provided with an internal thread (68) or into a material accumulation (66) in one of the half-shells (22, 24).

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