Hydraulic accumulator

Abstract

A hydraulic accumulator, comprising a base body (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i) having a first component (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i) and a second component (4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i) which are connected to one another by a form fit and/or a material join, is, with the aim of specifying a hydraulic accumulator which, after fabrication without difficulty, exhibits a very reliable seal, a high level of strength, an as far as possible undamaged surface and an as far as possible rotationally symmetrical design in the joining region of the components, characterized in that at least one component (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i) is deformed by a contactless shaping method in such a way that it enters into the form fit and/or material join with the other component (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i).

Claims

1. A hydraulic accumulator comprising: a base body having a first component and a second component connected to one another by one of a form fit and a material join, the first component and the second component forming a storage space for a gaseous medium and a receptacle space for a liquid medium, the storage space separated from the receptacle space by a diaphragm, where a volume of the storage space and a volume of the receptacle space are variable, the storage space is embodied without an inflow line, and the storage space includes the gaseous medium at a pressure different from atmospheric pressure; wherein at least one of the first component and the second component is deformed by contactless shaping in an installation space at a pressure different from atmospheric pressure to join the first component and the second component by the one of the form fit and the material join, the contactless shaping comprising electromagnetic pulse joining, wherein a wave structure is formed in the first component and a plurality of depressions is formed in the second component, the wave structure engaging the plurality of depressions; and wherein the diaphragm is placed under prestress without using a clamping ring by the deforming of the at least one of the first component and the second component.

2. The hydraulic accumulator as claimed in claim 1, wherein the first component and the second component are connected to one another by the material join.

3. The hydraulic accumulator as claimed in claim 1, wherein at least one of the first component and the second component is fabricated from a metal.

4. The hydraulic accumulator as claimed in claim 1, wherein at least one of the first component and the second component is fabricated from a plastic.

5. The hydraulic accumulator as claimed in claim 1, wherein the receptacle space has a connector integrally formed onto the first component.

6. The hydraulic accumulator as claimed in claim 1, wherein the first component is embodied as a housing lower shell and the second component is embodied as a housing upper shell, wherein an edge of the housing lower shell and an edge of the housing upper shell overlap one another and clamp a diaphragm therebetween.

7. The hydraulic accumulator as claimed in claim 1, further comprising a sealing means arranged between the first component and the second component.

8. A method of making a hydraulic accumulator comprising: deforming one of a first component and a second component by contactless shaping in an installation space at a pressure different from atmospheric pressure to join the first component and the second component by one of a form fit and a material join, the contactless shaping comprising electromagnetic pulse joining; wherein the first component and the second component are connected to one another by the one of the form fit and the material join to form a base body, the first component and the second component forming a storage space for a gaseous medium and a receptacle space for a liquid medium, the storage space separated from the receptacle space by a diaphragm, where a volume of the storage space and a volume of the receptacle space are variable, the storage space is embodied without an inflow line, the storage space includes the gaseous medium at a pressure different from atmospheric pressure, and wherein the diaphragm is placed under prestress without using a clamping ring by the deforming one of the first component and the second component during the step of deforming one of the first component and the second component to join the first component and the second component by one of the form fit and the material join.

9. The method of claim 8, wherein the first component and the second component are connected to one another by the material join.

10. The method of claim 8, wherein at least one of the first component and the second component is fabricated from a metal.

11. The method of claim 8, wherein at least one of the first component and the second component is fabricated from a plastic.

12. The method of claim 8, wherein the receptacle space has a connector integrally formed onto the first component.

13. The method of claim 8, wherein the first component is embodied as a housing lower shell and the second component is embodied as a housing upper shell, wherein an edge of the housing lower shell and an edge of the housing upper shell overlap one another and clamp the diaphragm therebetween.

14. The method of claim 8, further comprising a sealing means arranged between the first component and the second component.

15. The hydraulic accumulator as claimed in claim 1, wherein a first one of the first component and the second component is deformed by the contactless shaping and overlaps an outer surface of a second one of the first component and second component.

16. The hydraulic accumulator as claimed in claim 1, wherein a first one of the first component and the second component overlaps an outer surface of a second one of the first component and the second component and an edge of the first one of the first component and the second component is bent inwardly towards the second one of the first component and the second component.

17. The hydraulic accumulator as claimed in claim 1, wherein the first component overlaps an outer surface of the second component, the first component having a recess formed on an inner surface thereof engaging a projection formed on the outer surface of the second component.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) In the drawing:

(2) FIG. 1 shows a hydraulic accumulator which is embodied as a diaphragm accumulator and has two components which are connected to one another with a form fit and/or a material join, wherein a wave structure is impressed on the housing lower shell in the joining region,

(3) FIG. 2 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and has two components which are connected to one another with a form fit and/or a material join, wherein the upper edge of the housing lower shell is bent radially inward in the joining region,

(4) FIG. 3 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and has two components which are connected to one another with a form fit and/or a material join, wherein the edges of the housing lower shell and of the housing upper shell overlap one another in the joining region, and wherein a clamping ring is provided for the diagram,

(5) FIG. 4 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and has two components which are connected to one another with a form fit and/or a material join, wherein the edges of the housing lower shell and of the housing upper shell overlap one another in the joining region, wherein a clamping ring is provided and wherein the housing upper shell is deformed by means of the shaping method,

(6) FIG. 5 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and has two components which are connected to one another with a form fit and/or a material join, wherein the edges of the housing lower shell and of the housing upper shell overlap one another in the joining region and wherein the housing upper shell has an edge with a relatively large wall thickness,

(7) FIG. 6 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and has two components which are connected to one another with a form fit and/or a material join, wherein the edges of the housing lower shell and of the housing upper shell overlap one another in the joining region, wherein the housing upper shell has an edge with relatively large wall thickness, wherein the housing lower shell engages behind a shoulder in the housing upper shell and bears against an edge seal, and

(8) FIG. 7 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and in which multiple interlocking between the components is implemented,

(9) FIG. 8 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and in which a form fit is implemented by means of a sharp transition between two diameters of a component, and

(10) FIG. 9 shows a further hydraulic accumulator which is embodied as a diaphragm accumulator and in which an improved form fit is implemented by a recess.

EMBODIMENT OF THE INVENTION

(11) In the drawing, FIG. 1 shows a hydraulic accumulator 1a comprising a base body 2a with a first component 3a and a second component 4a which are connected to one another by a form fit and/or material join.

(12) At least one component, specifically the first component 3a, is deformed by a contactless shaping method such that it enters into the form fit and/or material join with the other component 4a.

(13) A wave structure is formed in the first component 3a, said wave structure being made complementary to elevated portions and depressions in the second component 4a.

(14) The shaping method which has been used to produce the form fit and/or material join is an electromagnetic pulse joining operation.

(15) The first component 3a is fabricated from aluminum or steel.

(16) The components 3a, 4a form a storage space 5a for a gaseous medium and a receptacle space 6a for a liquid medium, wherein the storage space 5a is separated off from the receptacle space 6a by a diaphragm 7a, and wherein the volumes of the storage space 5a and of the receptacle space 6a are variable. The diaphragm 7a is accommodated between the components 3a, 4a without a clamping ring.

(17) The storage space 5a is embodied without an inflow line. The receptacle space 6a has a connector 8a which is integrally formed onto the first component 3a.

(18) The first component 3a is embodied as a housing lower shell and the second component 4a as a housing upper shell, wherein the edges 9a, 10a of the housing lower shell or housing upper shell overlap one another and clamp in the diaphragm 7a between them. There is no clamping ring provided for the diaphragm 7a.

(19) The housing upper shell is provided with grooves. The diaphragm 7a is arranged between the housing upper shell and the housing lower shell. The joined-together hydraulic accumulator la withstands a defined burst pressure. Furthermore, it is gastight and oiltight. The fitting of the housing lower shell into the grooves of the housing upper shell occurs by partially reducing the diameters of the housing lower shell.

(20) In the drawing, FIG. 2 shows a hydraulic accumulator lb comprising a base body 2b with a first component 3b and a second component 4b which are connected to one another by a form fit.

(21) At least one component, specifically the first component 3b, is deformed by a contactless shaping method such that it enters into the form fit with the other component 4b.

(22) The shaping method which has been used to manufacture the form fit is an electromagnetic pulse joining operation.

(23) The first component 3b is fabricated from aluminum or steel.

(24) The components 3b, 4b form a storage space 5b for a gaseous medium and a receptacle space 6b for a liquid medium, wherein the storage space 5b is separated off from the receptacle space 6b by a diaphragm 7b, and wherein the volumes of the storage space 5b and of the receptacle space 6b are variable.

(25) The storage space 5b is embodied without an inflow line. The receptacle space 6b has a connector 8b which is integrally formed onto the first component 3b.

(26) The first component 3b is embodied as a housing lower shell and the second component 4b as a housing upper shell, wherein the edges 9b, 10b of the housing lower shell and housing upper shell overlap one another and clamp in the diaphragm 7b between them. There is no clamping ring provided for the diaphragm 7b.

(27) The edge 9b, directed toward the second component 4b, of the first component 3b is bent radially inward and in the process engages over a circumferential, arcuate shoulder of the second component 4b.

(28) In the drawing, FIG. 3 shows a hydraulic accumulator 1c comprising a base body 2c with a first component 3c and a second component 4c which are connected to one another by a form fit.

(29) At least one component, specifically the first component 3c, is deformed by a contactless shaping method such that it enters into the form fit with the other component 4c.

(30) The shaping method, which was used to manufacture the form fit, is an electromagnetic pulse joining operation.

(31) The first component 3c is fabricated from aluminum or steel.

(32) The components 3c, 4c form a storage space 5c for a gaseous medium and a receptacle space 6c for a liquid medium, wherein the storage space 5c is separated off from the receptacle space 6c by a diaphragm 7c, and wherein the volumes of the storage space 5c and of the receptacle space 6c are variable.

(33) The storage space 5c is embodied without an inflow line. The receptacle space 6c has a connector 8c which is integrally formed onto the first component 3c.

(34) The first component 3c is embodied as a housing lower shell and the second component 4c as a housing upper shell, wherein the edges 9c, 10c of the housing lower shell and of the housing upper shell overlap one another and clamp in the diaphragm 7c. A clamping ring 11 c is provided for the diaphragm 7c.

(35) The diaphragm 7c is pressed between the clamping ring 11 c and the edge 10c of the second component 4c. The edge 9c of the first component 3c has a radially inwardly directed constriction 12c.

(36) In the drawing, FIG. 4 shows a hydraulic accumulator 1d comprising a base body 2d with a first component 3d and a second component 4d which are connected to one another by a form fit.

(37) At least one component, specifically the second component 4d, is deformed by a contactless shaping method in such a way that it enters into the form fit with the other component 3d.

(38) The shaping method which was used to manufacture the form fit is an electromagnetic pulse joining operation.

(39) The second component 4d is fabricated from aluminum or steel.

(40) The components 3d, 4d form a storage space 5d for a gaseous medium and a receptacle space 6d for a liquid medium, wherein the storage space 5d is separated off from the receptacle space 6d by a diaphragm 7d, and wherein the volumes of the storage space 5d and of the receptacle space 6d are variable.

(41) The storage space 5d is embodied without an inflow line. The receptacle space 6d has a connector 8d which is integrally formed onto the first component 3d.

(42) The first component 3d is embodied as a housing lower shell and the second component 4d as a housing upper shell, wherein the edges 9d, 10d of the housing lower shell and of the housing upper shell overlap one another and clamp in the diaphragm 7d. A clamping ring lid is provided for the diaphragm 7d.

(43) The clamping ring 11d engages over the edge 9d of the first component 3d, projects into it and tapers in the direction of the receptacle space 6d. The edge 10d of the second component 4d is bent radially inward and is pressed, together with the edge 9d of the first component 3d, against the clamping ring 11d. The diaphragm 7d is pressed here between the clamping ring 11d and the edge 9d of the first component 3d.

(44) In the drawing, FIG. 5 shows a hydraulic accumulator 1e comprising a base body 2e with a first component 3e and a second component 4e which are connected to one another by a form fit.

(45) At least one component, specifically the first component 3e, is deformed by a contactless shaping method in such a way that it enters into the form fit with the other component 4e.

(46) The shaping method which was used to manufacture the form fit is an electromagnetic pulse joining operation.

(47) The first component 3e is fabricated from aluminum or steel.

(48) The components 3e, 4e form a storage space 5e for a gaseous medium and a receptacle space 6e for a liquid medium, wherein the storage space 5e is separated off from the receptacle space 6e by a diaphragm 7e, and wherein the volumes of the storage space 5e and of the receptacle space 6e are variable.

(49) The storage space 5e is embodied without an inflow line. The receptacle space 6e has a connector 8e which is integrally formed onto the first component 3e.

(50) The first component 3e is embodied as a housing lower shell and the second component 4e as a housing upper shell, wherein the edges 9e, 10e of the housing lower shell and of the housing upper shell overlap one another and clamp in the diaphragm 7e between them. There is no clamping ring provided for the diaphragm 7e. The diaphragm 7e projects with a bead in a positively locking fashion into a hollow in the edge 10e of the second component 4e.

(51) In the drawing, FIG. 6 shows a hydraulic accumulator If comprising a base body 2f with a first component 3f and a second component 4f which are connected to one another by a form fit.

(52) At least one component, specifically the first component 3f, is deformed by a contactless shaping method in such a way that it enters into the form fit with the other component 4f.

(53) The shaping method which was used to manufacture the form fit is an electromagnetic pulse joining operation.

(54) The first component 3f is fabricated from aluminum or steel.

(55) The components 3f, 4f form a storage space 5f for a gaseous medium and a receptacle space 6f for a liquid medium, wherein the storage space 5f is separated off from the receptacle space 6f by a diaphragm 7f, and wherein the volumes of the storage space 5f and of the receptacle space 6f are variable.

(56) The storage space 5f is embodied without an inflow line. The receptacle space 6f has a connector 8f which is integrally formed onto the first component 3f.

(57) The first component 3f is embodied as a housing lower shell and the second component 4f as a housing upper shell, wherein the edges 9f, 10f of the housing lower shell and of the housing upper shell overlap one another and clamp in the diaphragm 7f between them. There is no clamping ring provided for the diaphragm 7f. The diaphragm 7f projects with a bead in a positively locking fashion into a hollow in the edge 10f of the second component 4f. The edge 9f of the first component 3f bears against an edge seal 131 which lies in a stop 14f of the second component 4f.

(58) The diaphragms shown in FIGS. 1 to 9 are fabricated from an elastomer.

(59) FIG. 7 shows a hydraulic accumulator 1g comprising a base body 2g with a first component 3g and a second component 4g which are connected to one another by a form fit and/or material join.

(60) At least one component 3g is deformed by a contactless shaping method in such a way that it enters into the form fit and/or material join with the other component 4g. The shaping method is an electromagnetic pulse joining operation.

(61) FIG. 7 illustrates that the components 3g, 4g are multiply interlocked with one another. Specifically, the edges 9g, 10.sub.g are multiply interlocked with one another. In addition to a form fit, the edges 9g, 10g and/or the components 3g, 4g could be additionally connected to one another by a material join.

(62) FIG. 8 shows a hydraulic accumulator 1h comprising a base body 2h with a first component 3h and a second component 4h which are connected to one another by a form fit and/or material join.

(63) At least one component 3h is deformed by a contactless shaping method in such a way that it enters into the form fit and/or material join with the other component 4h. The shaping method is an electromagnetic pulse joining operation.

(64) The form fit is produced by a sharp transition between two diameters of the second component 4h. The sharp transition is implemented by a step 15h which is partially rectangular in cross section. The sharp transition is formed in the edge 10h of the second component 4h.

(65) In addition to a form fit, the edges 9h, 10h or the components 3h, 4h could be additionally connected to one another by a material join.

(66) FIG. 9 shows a hydraulic accumulator 1i comprising a base body 2i with a first component 3i and a second component 4i which are connected to one another by a form fit and/or material join.

(67) At least one component 3i is deformed by a contactless shaping method in such a way that it enters into the form fit and/or material join with the other component 4i. The shaping method is an electromagnetic pulse joining operation.

(68) The form fit is generated by a recess 16i which is made in the first component 3i or in the edge 9i thereof before the pulse joining operation. During the pulse joining operation, the first component 3i is fitted with the recess 16i onto a projection 17i on the second component 4i or on the edge 10i thereof. This brings about better interlocking of the components 3i, 4i.