EP2010779A2

EP2010779A2 - Device for securing high-pressure lines to a high pressure accumulator

Info

Publication number: EP2010779A2
Application number: EP07704616A
Authority: EP
Inventors: Johann Warga
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2006-04-13
Filing date: 2007-02-16
Publication date: 2009-01-07
Anticipated expiration: 2027-02-16
Also published as: DE502007003604D1; WO2007118724A2; CN101421507A; ATE466188T1; CN101421507B; JP2009533591A; EP2010779B1; DE102006017900A1; WO2007118724A3; US20090243285A1

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

description

title

Fastening device for high-pressure lines to a high-pressure accumulator

State of the art

DE 199 48 341 A1 also relates to a high-pressure fuel accumulator 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, there are machining openings in the wall of the high-pressure fuel accumulator known from DE 199 48 341 A1, which are each closed by sealing plugs.

DE 199 48 338 A1 has a method for processing a high-pressure fuel accumulator, a high-pressure fuel accumulator 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.

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. Force- high-pressure accumulators are also designed as multi-part, welded components that include a corresponding number welded individual parts, such as the aforementioned fittings and tabs, such a welded high-pressure fuel storage is fixed by means of tabs in the cylinder head 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 present invention seeks to provide a high-pressure accumulator, especially for Hochdruckspeich cher 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 which are used today and 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 at 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 upsetting of the high-pressure line, this half-shell can also be provided as a separate component with an insertion slot to be mounted as an individual 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 a collar-shaped approach manufacturing inaccuracies can be compensated and the acting on the seal between the upset in corresponding geometry surface on the lateral surface of the high-pressure accumulator body acting forces balanced 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 protrusion formed on one of the half-shells with the recess on the jacket surface of the high-pressure reservoir body causes a torsion fixation of the cup-shaped attachment during assembly to the outer surface and the high-pressure reservoir body and in particular during the generation of the preload, be it by a screw connection or not 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. It shows:

FIG. 1 shows a plan view of a first embodiment variant of a cup-shaped attachment for a high-pressure line on the lateral surface of a high-pressure reservoir body;

FIG. 2 shows a cross-section through the variant embodiment of a cup-shaped attachment for a high-pressure line on the lateral surface of a high-pressure reservoir body shown in FIG.

FIG. 3 is a bottom view of the first embodiment variant of the cup-shaped attachment of a high-pressure line on the lateral surface of a high-pressure reservoir body shown in FIGS. 1 and 2;

FIG. 4 shows a section through a further embodiment variant of a cup-shaped fastening of a high-pressure line on the jacket surface of a high-pressure reservoir body,

FIG. 5 is a bottom view of the second variant of the cup-shaped attachment of a high-pressure line shown in FIG.

FIG. 5.1 is a side view of the second variant of the cup-shaped attachment shown in FIG. 5;

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

FIG. 7 shows a further, third embodiment variant of a cup-shaped attachment of a high-pressure line to the jacket surface of a high-pressure reservoir body with a clamping force introduction point generated by deformation of the open half-shell ends;

8 shows a fully developed clamping force introduction point according to the third variant of the cup-shaped fastening shown in FIG. 7, FIG.

FIG. 9 shows a plan view of the further third embodiment variant of the cup-shaped attachment illustrated in FIG. 7, Figure 10 shows 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 shows a side view of the further, fourth embodiment variant of the cup-shaped attachment between the high-pressure line and the tubular high-pressure storage body shown in FIG. 10,

FIG. 12 is a plan view of the fourth variant of the cup-shaped attachment shown in FIG. 10,

FIG. 13 shows a further embodiment variant of the cup-shaped attachment in sectional representation,

13.1 shows a side view of the embodiment variant shown in FIG. 13 with an overlap disposed above the axis of symmetry, FIG.

Figure 13.2 is a plan view of the embodiment shown in Figure 13 and

Figures 4.1 and

14.2 a further embodiment variant with axially displaceable and verrastba- ren shells of a cup-shaped attachment.

variants

Representation of Figure 1 is a first embodiment of a cup-shaped attachment of a high-pressure line on the lateral surface of a high-pressure storage body can 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 surrounds a lateral surface 12 of the tubular high-pressure storage body 10, preferably along the entire circumference, apart from the junction 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 Accordingly, 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, which is shown in section, is accommodated, which has a flow cross-section 18 and extends to a fuel injector (not shown in FIG. 1). Through the high-pressure line 16, the fuel stored in the hollow space of the high-pressure accumulator body 10 and under system pressure is fed to the fuel injector. The high-pressure line 16 shown in section in FIG. 1 is fastened to the lateral surface 12 of the high-pressure reservoir body 10 by means of a cup-shaped attachment 20. The cup-shaped attachment 20 comprises an upper shell 22 and a lower shell 24, which are formed substantially semicircular. In the first embodiment of the cup-shaped attachment 20 shown in Figure 1 extends in the upper shell 22, a slot-shaped recess 26. By the slot-shaped recess 26 of the upper shell 22 ensures that the upper shell 22 during assembly as a separate component on a not shown in Figure 1 Upset 44 (see illustration according to Figure 2) can be pushed, ie this overlaps. A first connection of the upper shell 22 to the lower shell 24 is provided by a clamping 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 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 the first embodiment variant shown in FIG. 1 of a cup-shaped attachment of a high-pressure line 16 to the jacket surface of a high-pressure reservoir body.

2, a wall 40 of the high-pressure reservoir body 10 encloses a cavity 38. The cavity 38 is subjected to system pressure, this pressure level being in the range between 1600 and 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. As can be seen from FIG. 2, the connection bores 42 open into funnel-shaped configured surfaces 43. Instead of a funnel-shaped configuration, the surfaces 43 can also be designed to be hemispherical or in another 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 _κ in the cup-shaped attachment 20, extending between the ends of the upper shell 22 and the lower shell 24 is a helically formed clamping element 28. A threaded portion of the clamping element 28 is through Reference numeral 52 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 reservoir body 10. At the first introduction point 32, any remaining play 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 embodiment shown in Figure 2 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 thread portion 52 between the ends of the upper shell 22 and lower shell 24, the Klemrnkraft F _κ can be produced, wherein the initiated at the first introduction point 32 and at the second introduction point 34 Klemrnkraft F _κ preferably, the applied sealing force 36 (F _D ) corresponds. This ensures that a leak-tight connection between the upset 44 and the connecting surface 43 formed in a complementary geometry to the circumferential surface 12 of the high-pressure storage body 10 is formed.

FIG. 3 shows the first embodiment variant of the cup-shaped fastening according to the invention from the underside.

FIG. 3 shows that the clamping element 28 passes through the nut 50, as a result of which 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 possibly existing game is pushed out of the cup-shaped attachment 20 at the first force introduction point.

Figure 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 second embodiment variant shown in FIG. 4 can be taken away from the fact that the upper shell 22 and the lower shell 24 are connected to one another at the first point of introduction 32 of the clamping force F _K by means of an overlap 60. In the embodiment variant shown in FIG. 4, a bent end of the upper shell 22 overlaps a shoulder 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 one another via a clamping element 28. In contrast to the illustration according to FIG. 2, in this embodiment variant the nut 50 is dispensable, since the internal thread for the screw-shaped clamping element 28 is formed in a material accumulation 66. The internal thread is identified by reference numeral 68. In contrast to the sectional view of the first embodiment of the cup-shaped attachment shown in Figure 2, the high-pressure line 16 has 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 comprises the opening tion 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 contact surface 43 on the lateral surface 12 of the high-pressure reservoir body 10 is produced when the upper shell 22 is biased against the lower shell 24. The upper shell 22 can be provided with a recess 62, which cooperates with a correspondingly 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 without lateral forces mounted on the lateral surface 12 of the high-pressure accumulator body 10 can be.

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

FIG. 5 shows that the upper shell 22 encloses 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. Figure 5 can be seen in the plan view of the tensioning member 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 _κ. 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.

FIG. 5.1 shows a side view of the overlap, with which the upper shell and the lower shell of the cup-shaped attachment according to FIG. 5 engage one another.

From the side view according to FIG. 5.1, it can be seen that the overlap 60, as shown in FIG. 5, is produced _without tools in the region of the first introduction point 32 for the clamping force F _K and by a positive connection between the open ends of the upper shell 22 and the lower shell 24 arises. For orientation, the high-pressure line 16 is partially indicated on the upper shell 22.

FIG. 6 is a plan view of the second embodiment variant of the cup-shaped attachment of the high-pressure line, shown in section in FIG. 4, on the jacket surface of the high-pressure reservoir body. From the illustration according to FIG. 6, it can be seen that the upper shell 22 contains the slot-shaped recess 26 already mentioned. 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 storage body 10. In this case, the slot-shaped recess 26 allows lateral sliding of the upper shell 22 on the rounded in Figure 4, there rounded upset 64 at the end of the high pressure line 16. As already mentioned, the upper shell 22 and the lower shell 24 of the cup-shaped attachment in the first introduction point 32 for the clamping force F _κ interlocked or hooked together. 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, it is indicated that the wall 40 of the high-pressure storage body 10 encloses its cavity 38. Below the indicated high-pressure line 16 shown in FIG. 6, the connection bore 42 shown in section in FIG. 4 in the wall 40 of the high-pressure storage body 10, which merges into the contact surface 43, is funnel-shaped here.

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

According to the further third variant of the cup-shaped attachment 20 shown in FIG. 7, the lateral surface 12 of the high-pressure reservoir body 10 is enclosed by the outer shell 22 and the lower shell 24 in the region of the connection bore 42. In the representation according to Figure 7, the encroachment 60 is formed at the first introduction point 32 _κ for the introduction of the clamping force F, with the formation of a spannelement- free clamp 78 is a cross-end 80 of the upper shell 22, a cross-end 82 of the lower shell 24 encloses. The double arrow indicates that the position of the overlap 60 can be formed at arbitrary locations on the lateral surface 12, that is to say in any angular position with respect to the axis of symmetry 14 of the high-pressure reservoir body 10. As shown in Figure 7 is at the first introduction point 32 of the clamping force F _κ opposite second introduction point 34, the open end of the upper shell 22 is moved in the direction of a deformation path 26 finally the position shown in Figure 8 span element-free clamping 78 at the second introduction point 34 of the clamping force F _κ generated.

From the illustration according to FIG. 7, it can also be seen that the upper shell 22 has a dome-shaped shoulder, which in the representation according to FIG. 7 is a spacer 72 encloses. Instead of the spacer disk 72 shown in FIG. 7, which is formed without a sleeve-shaped collar, the spacer disk 92 shown in FIG. 10.1 can also be used here with a collar, which ensures that the high-pressure line 16 is fastened to the lateral surface 12 of the high-pressure reservoir body 10 free of lateral force load. is sealed.

The reproduced in accordance with Figure 7 spacer 72 is located 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 abutment 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 forms a tensioning connection at the second introduction point 34 during a deformation of the open end of the upper shell 22 according to 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 transverse forces through the upper shell 22. As an alternative to the spacer 72 shown in FIG. 7, the lateral surface of the high-pressure line 16 can also be surrounded by the spacer 92 shown in section in section 10.1 with a collar-shaped projection.

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

Of Figure 8 shows that during deformation of the upper end of the upper shell 22 in the direction of the deformation path 76 - as shown in Figure 7 - a clamping element-free clamping 78 at the second introduction point 34 of the clamping force F _κ is generated. As a result, on the one hand, possibly still at the first point of introduction 32 of the clamping force F _κ existing game pushed out of the cup-shaped attachment 20 and on the other hand reached a fully circumferential abutment of the inner sides of the upper shell 22 and the lower shell 24 on the outer surface 12 of the high-pressure storage body 10. FIG. 9 shows the third embodiment variant of the shell-shaped attachment of the high-pressure line on the lateral surface of the high-pressure reservoir body shown in FIG. 7 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 (not shown in FIG. 9) are connected to one another by the overlap 60 as shown in FIG. 7 in the region of the first point of introduction 32 of the clamping force F _K.

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

From the illustration according to FIG. 10, it can be seen 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 inserted into one another in a form-fitting manner, 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 one another in the region of the first introduction point 32, the projection 84 can be formed on the inner side facing the lateral surface 12 of the high-pressure storage element 10, which projection corresponds to the latter Geometry formed recess 86 of the lateral surface 12 of the high-pressure accumulator body 10 engages. In this way, a relative movement between the tubular high-pressure accumulator body 10 and the cup-shaped attachment 20 enclosing it is also excluded in the embodiment variant shown in FIG. 10, so that a transverse force introduction into the high-pressure line 16 is avoided.

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 disk 72 is braced on the one hand on the shoulder 54 of the upset 74 with conical surface and on the other hand is enclosed by the upper shell 22. The collar-shaped projection of the spacer disk 92 as shown in FIG. 10.1 protects the outer circumferential surface of the high-pressure feed line 16 against the introduction of transverse forces and makes the unification uniform. conduction of the prestressing force. In addition, FIG. 10.1 shows that the spacer disk 92 with a collar-shaped projection has an inner diameter 94 which essentially corresponds to the outer diameter of the high-pressure line 16. In the illustration according to FIG. 10, the upset 74, which has a frustoconical surface, is pressed into the funnel-shaped connection surface 43 of the lateral surface 12 above the connection bore 42 of the wall 40. 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 embodiment variant shown in FIG. 10, the sealing force F _D (reference numeral 36) between the upper shell 22 and the lower shell 24 of the cup-shaped attachment 20 is generated via the tensioning element 28. 10, a threaded collar 90 can be formed in the lower shell 24, for example, by screwing in the threaded section 52 of the clamping element 28. 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 shown in connection with the embodiments according to Figures 1 and 6, may be omitted.

While the clamping force F _K at the first point of introduction 32 is introduced through the nested ends of the upper shell 22 and the lower shell 24 in the further, fourth embodiment variant of the cup-shaped attachment 20 shown in section in FIG. 10, the clamping force F _K becomes at the second Introductory point 24 applied by the clamping element 28. Preference is thus given to the introduction of the clamping force F _K at two points on the lateral surface 12 of the high-pressure reservoir body 10. Preferably, F _D = 2

The embodiment variant of the cup-shaped attachment 20 illustrated in FIG. 10 is characterized in that in the area of the first introduction point 32 of the clamping force F _K the connection connection 60 does not protrude in the radial direction over the upper shell 22 or the lower shell 24, as is the case, for example, during grip 60 as shown in Figure 7 or the encroachment in the representation of Figure 4 or in the embodiment shown in Figure 2 is the case. This results in an additional space advantage since the cup-shaped mounting 20, only processing site in the region of the second initiation 34 of the clamping force F _κ little installation space. FIG. 11 shows a side view of the further fourth embodiment variant of the cup-shaped attachment of a high-pressure line 16 on the lateral surface of the high-pressure reservoir body shown in FIG.

From Figure 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, the protrusion 84 is formed in the embodiment of FIG 11 on the inside, which protrudes into a recess 86 in the lateral surface 12 of the high-pressure accumulator body 10 and therefore a relative movement between the high-pressure accumulator body 10 and the cup-shaped attachment 20 in the formation of the terminal the high-pressure line 16 on the high-pressure storage body 10 effectively prevented. The illustration according to FIG. 12 shows a side view of the fourth embodiment variant of the high-pressure connection shown in FIG. From the illustration according to FIG. 11, it can be seen that the projection 84 or the recess 86 cooperating therewith lie 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 plan view of the fourth variant of the high-pressure connection shown in section in FIG. 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 shows a further embodiment variant of the connection of a high-pressure connection to a high-pressure reservoir body 10. The representation according to FIG. 13 substantially corresponds to the representation according to FIG. 10. In contrast to the illustration according to FIG. 10, in FIG. 13 the wrap angle of the lower shell 24 is identified by reference numeral 98. Complementing this wrap angle, the wrap angle of the upper shell 22 of the cup-shaped attachment 20 is made smaller. 13 shows that the projection 84 on the inner surface of the upper shell 22 and the recess 86 formed complementary thereto are formed on the lateral surface 12 of the high-pressure storage body 10 in the region of the overlap 60, cf. also representation according to Figure 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 illustration according to FIGS. 14.1 and 14.2 shows a further embodiment variant of the cup-shaped attachment proposed according to the invention.

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 embodiment variants, the half shells 22, 24 are axially displaceable in the joining direction 102, ie parallel to the axis of symmetry 14 of the high-pressure accumulator body 10, as shown in FIGS. 14.1 and 14.2. 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. Finally, the sealing force F _D , with which the conical upset 74 is pressed into the jacket surface 12 of the high-pressure reservoir body 10, is generated via the biasing element 28 shown in FIG.

Claims

claims

1. Device (20) for connecting a high-pressure line (16) on a tubular high-pressure storage body (10), in the wall (40) at least one Anschlußboh- tion (42) for the high pressure line (16) is formed, characterized in that one end (44, 64, 74) of the high-pressure line (16) of a half-shell (22, 24) of the high-pressure storage body (10) enclosing, cup-shaped attachment (20) is overlapped, wherein the shells (22, 24) are braced against each other.

2. Device according to claim 1, characterized in that the cup-shaped attachment (20) comprises an upper shell (22) and a lower shell (24), the hooked at a first introduction point (32) for a clamping force F _κ , interlocked or into each other are inserted.

3. A device according to claim 1, characterized in that the half-shells (22, 24) at a second introduction point (34) for a clamping force F _κ by means of a clamping element (28) are braced against each other or via a clamping element-free clamping (78) on a lateral surface (12) of the high pressure storage body (10) are braced.

4. The device according to claim 1, characterized in that a lateral surface (12) of the high-pressure storage body (10) has at least one recess (86) into which engages at least one on one of the half-shells (22, 24) formed projection (84) as anti-rotation ,

5. The device according to claim 4, characterized in that the at least one recess (86) of the high-pressure storage body (10) and the at least one on one of the half shells (22, 24) formed projection (84) an anti-rotation in any circumferential angular position with respect to the Form high pressure storage body (10).

6. The device according to claim 2, characterized in that the first force introduction point (32) for the clamping force F _{K is designed} as an overlap (60) on which an overlying end (80) on one of the half shells (22, 24) overlapped end (82) of one of the two half-shells (22, 24) encloses.

7. The 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 truncated cone-shaped upset (74).

8. The device according to claim 7, characterized in that the end (44, 64, 74) of the high-pressure line (16) has a shoulder (54) on which the sealing force F _{D of} the cup-shaped attachment (20) in the high-pressure line (16) is initiated.

9. Apparatus according to claim 8, characterized in that above the end (44, 64, 74) of the high-pressure line (16) a spacer (72) or a spacer (92) is received with a collar-shaped projection.

10. The device according to claim 3, characterized in that the clamping element (28) at the second point of introduction (34) of the clamping force F _κ in a provided with an internal thread (68) threaded collar (90) or a material accumulation (66) in one of the half shells (22, 24) is screwed.