Hydropneumatic device and assembly kit

Abstract

A hydropneumatic device having pressure a working part with a working piston guided in the working part and an intensifier part with an intensifier piston guided in the intensifier part. A connecting section for a hydraulic connection of the working part and of the intensifier part provides a connecting line for passage of hydraulic fluid between the working part and the intensifier part. The connecting section includes an adapter component which can be mounted on the working part and the intensifier part, and in the interior of which the connecting line is formed. In the mounted state of the adapter component, an opening, which is provided at the side on the working part, of a hydraulic chamber of the working part is connected, via the connecting line, to an opening, which is provided at the side on the intensifier part, of a hydraulic chamber of the intensifier part.

Claims

1. A hydropneumatic device having pressure intensification, wherein the hydropneumatic device comprises: a working part with a working piston guided in the working part; and an intensifier part with an intensifier piston guided in the intensifier part, at least the intensifier part having a first end and a second end, wherein a connecting section provides a hydraulic connection between the working part and the intensifier part to provide a connecting line for the passage of hydraulic fluid between the working part and the intensifier part, wherein the connecting section comprises a rigid adapter component adapted to be mounted solely in contact with both a planar outer peripheral side surface of the working part and a planar outer side surface of the intensifier part, intermediate the first end and the second end of the intensifier part, wherein an interior of the rigid adapter component houses the connecting line, and wherein in a mounted state of the rigid adapter component, a first opening provided on the planar outer peripheral side surface of the working part, that passes in a direction perpendicular to a longitudinal direction of the working part and which is in communication with a hydraulic chamber of the working part, is connected to a second opening provided on the planar outer peripheral side surface of the intensifier part, that passes in a direction perpendicular to a longitudinal direction of the intensifier part and which is in communication with a hydraulic chamber of the intensifier part, via the connecting line in the interior of the rigid adapter component.

2. The device as claimed in claim 1, wherein in the mounted state, the rigid adapter component, by means of main faces provided in an oppositely disposed manner on the rigid adapter component, is supported on the working part and the intensifier part.

3. The device as claimed in claim 1, wherein the working part and the intensifier part each include an end section, with respect to the longitudinal direction of the working part and the intensifier part, and wherein the rigid adapter component is supported proximate the respective end sections of the working part and the intensifier part in the mounted state.

4. The device as claimed in claim 3, wherein the rigid adapter component is a square-shaped component with attachment openings through which fastening means extend for mounting the rigid adapter component on the working part and on the intensifier part.

5. The device as claimed in claim 4, wherein the end section of the working part and the end section of the intensifier part are matched to the associated attachment openings on the rigid adapter component for mounting the rigid adapter component on the working part and on the intensifier part by the fastening means.

6. The device as claimed in claim 3, wherein the end section of the working part and the end section of the intensifier part each have corresponding mounting mechanisms for mounting the rigid adapter component thereon.

7. The device as claimed in claim 1, wherein in the mounted state of the rigid adapter component, the connecting line in the rigid adapter component has a section that extends in the longitudinal direction of the intensifier part and of the working part.

8. An assembly kit with components of a hydropneumatic device for providing a hydropneumatic device that includes an intensifier part and a working part that is hydraulically connected to the intensifier part via a connecting section, the working part having a first diameter, wherein the assembly kit comprises a plurality of different intensifier parts, at least one working part, and an adapter kit comprising a plurality of rigid adapter components, wherein a hydraulic connection is provided between a first opening in an outer peripheral side surface in any of the plurality of different intensifier parts and a second opening in an outer peripheral side surface of the at least one working part via a matching rigid adapter component from the adapter kit of the plurality of rigid adapter components, the matching rigid adapter component being configured to be mounted solely in contact with the outer peripheral side surface of the any of the plurality of different intensifier parts, and solely in contact with the outer peripheral side surface of the at least one working part, and wherein at least one of the plurality of different intensifier parts has an intensifier step defined by a second diameter, the second diameter being different from the first diameter.

9. The assembly kit as claimed in claim 8, wherein the adapter kit of the plurality of rigid adapter components comprises different rigid adapter components, wherein, each rigid adapter component of the plurality of different rigid adapter components is matched to one of the different intensifier parts and to the at least one working part, whereby simply by selecting a suitable one of the rigid adapter components from the adapter kit and mounting the selected suitable rigid adapter component on the matching intensifier part and the matching working part, a desired combination of one of the intensifier parts from among the plurality of different intensifier parts with the at least one working part is realized.

10. The assembly kit as claimed in claim 8, wherein a rigid adapter component from the adapter kit of the plurality of rigid adapter components is matched to a mounting section on an intensifier part and a working part, at least one of the intensifier part and the working part defining an axis, so that mounting of the rigid adapter component on the intensifier part and the working part is achieved via at least one connecting element that extends laterally through a width direction of the rigid adapter component, the width direction of the rigid adapter component being substantially normal to the axis defined by the at least one of the intensifier part and the working part.

11. The assembly kit as claimed in claim 10, wherein in the mounted state of the rigid adapter component, a first connecting element engages a first prepared opening in the mounting section of the intensifier part, and a second connecting element engages in a second prepared opening in the working part.

12. The assembly kit as claimed in claim 8, further comprising a hose adapter kit including a plurality of hose adapter components having a flexible connecting line section, wherein the hydraulic connection between any of the plurality of different intensifier parts and the at least one working part is selectively realized with a matching one of the rigid adapter components or with a matching one of the hose adapter components from the hose adapter kit of the plurality of hose adapter components.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further features and advantages of the invention are explained in more detail based on different exemplary embodiments according to the invention which are shown in the figures.

(2) FIG. 1 is a schematic side view of a known hydropneumatic device;

(3) FIG. 2 is a perspective view of a working part of a hydropneumatic device according to the invention;

(4) FIG. 3 is a perspective view of an intensifier part of a hydropneumatic device according to the invention;

(5) FIGS. 4 to 6 each show a perspective hydropneumatic device according to the invention with a working part and an intensifier part in the assembled state;

(6) FIGS. 7 to 9 are perspective views each showing further hydropneumatic devices according to the invention with an intensifier part and at least one working part in the assembled state;

(7) FIG. 10 is a side view showing a further hydropneumatic device according to the invention in the assembled state; and

(8) FIG. 11 is an exploded view showing a further hydropneumatic device according to the invention.

DETAILED DESCRIPTION OF THE DRAWINGS

(9) In the figures, the same designations are used in part for corresponding elements in the different exemplary embodiments.

(10) FIG. 1 shows a hydropneumatic device according to the prior art which by way of example is designed as a pneumohydraulic drive system or as a clinching or riveting device. The arrangement according to FIG. 1 is subsequently referred to as a pressure intensifier 1. The pressure intensifier 1 in essence comprises three basic components with a working part 2, an intensifier part 3 and a connecting section 7 with a hydraulic hose. The working part 2 comprises a working piston 5 which can move back and forth in a housing 4 of the working part 2 according to the double arrow P1. In FIG. 1, the completely extended position of the working piston 5 is shown, wherein the visible part in FIG. 1 of the working piston 5, which projects from an end-face housing section 4a of the housing 4, extends further into the interior of the working part 2. The housing 4, in the longitudinal direction of the working part 2, comprises a further end-face housing section 4b on the end side opposite the end-face housing section 4a, and between these comprises a lateral housing section 4cwhich delimits the working part 2 circumferentially around the longitudinal axis S thereof.

(11) The working piston 5 executes the actual reciprocating movement during operation of the pressure intensifier 1, wherein the working piston 5 is moved forward in a rapid traverse stroke either pneumatically or hydraulically up to the desired position in the direction of a component (not shown) which is to be processed. The actual power stroke commences after contact is made with the component. In the process, a hydraulic high pressure of 250 to 400 bar, for example, is generated in the intensifier part 3 from a pneumatic low pressure of 2 to 10 bar, for example. This hydraulic high pressure acts upon the hydraulic surface of the working piston and so generates a desired high pressing force for the power stroke of up to 2000 kN, for example.

(12) A return stroke of the working piston 5 and of an intensifier piston, which can also move back and forth in a housing 6 of the intensifier part 3 in the longitudinal direction according to the extension of the axis S, is carried out pneumatically in an initial position by switching air pressure to a return-stroke side of the two pistons of working part 2 and intensifier part 3.

(13) The working part 2 and the intensifier part 3 are hydraulically interconnected via the connecting section 7 between the working part 2 and the intensifier part 3.

(14) For the reciprocating movement of the working piston 5, an oil volume, which corresponds to the total stroke of the working piston 5, is required in a storage chamber in the intensifier part 3 and flows from a hydraulic volume provided in the intensifier part 3 into a hydraulic volume in the working part 2, and vice versa, so that a movement of the intensifier piston induces a movement of the working piston 5.

(15) Not shown in FIG. 1 are further components on the pressure intensifier 1, such as a pneumatic control unit on the intensifier part 3. Such a pneumatic control unit 10 is visible in FIGS. 3 to 9.

(16) For a desired power stroke on the working piston 5, a stroke of the intensifier piston, which is to be designed in advance, is to be provided on the intensifier part 3.

(17) FIG. 2 shows a working part 8 of a hydropneumatic device according to the invention, for which FIG. 3 shows an intensifier part 9. The working part 8 and the intensifier part 9 can be assembled via an adapter component 11 (see FIG. 11), forming a hydropneumatic device according to the invention. The rigid or fixed adapter component 11 is designed here as a cube-like metal component with conducting line sections, provided inside, for the passage of hydraulic fluid.

(18) The working part 8, the intensifier part 9 and the adapter component 11 are especially parts of an assembly kit according to the invention for providing a hydropneumatic device which is constructed from the components 8, 9 and 11 of the assembly kit.

(19) Depending upon the intended application or design of the hydropneumatic device which is to be provided, a type of an intensifier part, adapter component and, if applicable, a working part is selected and assembled from a range or a kit of different types of the components, forming a desired hydropneumatic device. The different types of a respective component usually differ from each other only in a dimensional size which is not critical for the actual assembly. The respective design or the respective dimensions of the sections which is, or are, relevant for mounting on the intensifier part and working part does not, or do not, differ in the different types of kit of types of adapter components. This correspondingly applies in each case to the types from the kit of intensifier parts and working parts.

(20) For assembling different combinations from the kit of types of intensifier parts and working parts, only the matching adapter component needs to be selected, which adapter components are also provided in a kit of different types or sizes in the assembly kit. The assembly kit therefore comprises in each kit a multiplicity of premanufactured similar components which differ from the other types only by design features.

(21) Overall, therefore, the number of parts to be made available can be reduced or optimized and kept comparatively low.

(22) FIGS. 4 to 6 show in each case different hydropneumatic devices according to the invention. FIGS. 4 and 5 show, for example, in each case an identical working part 8 which is connected via an adapter component 11a or 11b to a different type of intensifier part 9 or 12 in each case. The intensifier part 12 differs, for example, by its larger length dimension compared with the otherwise similarly constructed intensifier part 9. The intensifier parts 9 and 12 are different types of intensifier parts which belong to the same kit of types of intensifier parts. Also, the connecting intermediate elements or the adapter components 11a and 11b belong to a similar kit of types of adapter components. The adapter components 11a and 11b differ only in length, whereby the adapter component 11a has a shorter length L1 compared with the length L2 of the adapter component 11b, which corresponds to the length difference of the intensifier parts 9 and 12.

(23) FIG. 6 relates to a further alternative hydropneumatic device according to the invention with a working part 13, the total stroke of which is adjustable and which is hydraulically connected via the adapter component 11a to the intensifier part 9. The working part 13 belongs to the same kit of types of working parts, wherein one type comprises the working parts 8 according to FIGS. 4 and 5 and another type of working parts comprises working parts according to working part 13. The intensifier part 9 according to FIG. 6 corresponds to the intensifier part 9 in FIG. 4, therefore the identical designation also corresponds.

(24) Shown in FIGS. 7 to 9 are hydropneumatic devices according to the invention which in each case comprise at least one hose adapter component from a kit of types of hose adapter components. The hydropneumatic device according to FIG. 7 is assembled from a working part 8 and an intensifier part 9, wherein the hydraulic connection between the working part 8 and the intensifier part 9 is realized by the hose adapter component 14. The hose adapter component 14 has a flexible hose section 14a between a rigid hose coupling part 14b on the working part 8 and a further rigid hose coupling part 14c on the intensifier part 9.

(25) FIG. 8 shows an extension of the arrangement from FIG. 7 with a further working part 8, wherein a hose adapter component 16 corresponding to the hose adapter component 14 from FIG. 7 is provided. Furthermore, for the further working part 8 provision is made for a hose adapter component 15 with a hose coupling part 15a which is connected to the hose coupling part 16 which in turn is mounted on the intensifier part 9. Accordingly, almost any cascade-like extension of an intensifier part with a plurality of working parts is possible by means of a plurality of hose adapter components.

(26) The hydropneumatic device according to FIG. 9 differs from the arrangement according to FIG. 6 only by the fact that instead of the working part 8, a working part 13 with an adjustable total stroke is integrated. A hose adapter component 17 corresponds to the hose adapter component 14.

(27) The arrangement from FIG. 7 represents a variant to the arrangement from FIG. 4, and by the same token the arrangement from FIG. 9 represents a variant to the arrangement from FIG. 6, wherein all four variants from an associated assembly kit can be provided by selection of the relevant types. The assembly kit comprises in this case four kits of types of four components, specifically in each case a kit of types of intensifier parts, working parts, adapter components and hose adapter components.

(28) FIG. 10 corresponds to a further alternative embodiment of a hydropneumatic device according to the invention or of a pressure intensifier 18 from the side with a working part 19 and an intensifier part 20 which are hydraulically interconnected via an adapter component 21, which is shown in section. In contrast to the embodiments according to FIGS. 4 to 9, the pressure intensifier 18 is not designed with a side opening on the end side in the longitudinal direction but with a central outlet 22. The central outlet 22 comprises an opening (not visible) leading to the intensifier part 20 at the side, which opening is clearly offset in the longitudinal direction from end sections or cylinder covers of the intensifier part 20. The opening, during a piston movement, serves for the passage of hydraulic fluid from the intensifier part 20 into the adapter component 21 and from there for further passage into the working part 19, or back again during a correspondingly reverse movement of the pistons. In the working part 19, an opening is correspondingly formed at the side on the working part 19 in a section of the working part 19 which is formed as a cylinder cover 23. Inside the rigid adapter component 21, provision is made for an internally disposed connecting line section 21a for conducting hydraulic fluid, which on the outside interconnects the lateral opening of the central outlet 22 and the lateral opening in the cylinder cover 23 of the working part 19 with sealing effect. The connecting line section 21a extends by a middle section in the longitudinal direction of the working part 19 or of the intensifier part 20 or parallel thereto. The middle line section is at right angles in each case to comparatively short end line sections which in the mounted state are oriented in each case perpendicularly to locating faces on the working part or intensifier part.

(29) FIG. 11 shows in exploded view the hydropneumatic device or the arrangement according to the invention according to FIG. 4 with an adapter component 11, a working part 8 and an intensifier part 9 of larger diameter compared with the working part 8. The adapter component 11, by connecting means, which in this case are formed as screws 31a, 31b, can be connected in each case to the working part 8 and to the intensifier part 9. To this end, provision is made for coinciding, prepared hole patterns, of which a hole pattern 24 on the working part 8 is explained by way of example. The prepared hole pattern 24 has four screw-in holes 24a with a female thread in a lateral planar surface 25a of a cylinder cover 25 of the working part 8. The four screw-in holes 24a are positioned in the corners of an imaginary cube or of a rectangle on the planar surface 25a around an opening 28 for the passage of hydraulic fluid. A hole pattern 26 for the screws 31a which corresponds to this is provided in a lower region of the adapter component 11 in each case on opposite main faces 29 and 34 of the adapter component 11. The corresponding hole patterns 26 are formed by four through-openings which penetrate the adapter component 11 in the direction of its width B.

(30) By the screwing of the adapter component 11 to the planar surface 25a in the orientation shown according to FIG. 11 by means of the screws 31a, the adapter component 11 can be fixed in a positionally accurate manner on the cylinder cover 25.

(31) The screwing of the adapter component 11 to a planar surface 33a of a cylinder cover 33 of the intensifier part 9 is carried out by means of the screws 31b, wherein the planar surface 33a is parallel to the main face 34, just as the main face 29 is parallel to the planar surface 25a. The cylinder cover 33 is provided with four rod-like tie-rods 32 which engage therewith (in FIG. 11 only two are visible), wherein the tie-rods 32 fit through openings in a further cylinder cover at the other longitudinal end of the intensifier part 9 so that, by the projecting ends of the tie-rods with the male thread, the two cylinder covers are pressed on the end face against the essentially cylindrical housing 6 by means of screwed-on screw nuts in each case. The corresponding parts of the working part 8 are connected in the same way.

(32) For screwing the intensifier part 9 to the adapter component 11, the longer screws 31b are inserted through through-holes from the side of a planar surface 33b of the cylinder cover 33 and are screwed into corresponding screw-in holes with a female thread in the upper part of the adapter component 11.

(33) A mounting by means of four screws, for example, which extend from the main face 29 of the adapter component 11 through this and further into the cylinder cover 33 of the intensifier part 9, would also be conceivable.

(34) The planar surface 33b lies opposite the planar surface 33a in a parallel orientation. The through-holes in the cylinder cover 33 and the associated screw-in holes in the upper part of the adapter component 11 correspond in their relative position or in their hole pattern to the hole pattern 24 in the planar surface 25a or to the hole pattern 26 in the lower part of the adapter component 11 on the main faces 29 and 34.

(35) With the adapter component 11 fixedly screwed on, a hydraulic connection between the intensifier part 9 and the working part is realized, and in which during a corresponding reciprocating movement of the intensifier piston and working piston, hydraulic fluid makes its way from the intensifier part 9, via an opening 35 in the cylinder cover 33 and further via the opening 30 in the main face 34, into a connecting line inside the adapter component 11 and from there can flow across to the opening 28 in the cylinder cover 25 of the working part 8 and into a hydraulic chamber in the working part 8.

(36) In the case of a reverse reciprocating movement of the pistons, hydraulic fluid can correspondingly flow back from the working part 8 into the intensifier part 9.

(37) Using the adapter component 11 according to the invention or the uniform hole patterns on the adapter component 11 and on the cylinder covers 25 and 33, the relative position between the intensifier part 9 and the working part 8 can be variably selected. The adapter component 11, starting from a mounting position for example according to FIG. 11 with a square hole pattern or square arrangement of the screws, can be mounted in a manner offset by 90, 180 and 270 angular degrees around a central axis of the opening 28, as a result of which the intensifier part 9 is also correspondingly altered in its orientation in relation to the working part 8.

(38) With such a rectangular hole pattern (not shown) or with such an arrangement of screw-holes in the corners of an imaginary rectangle on the relevant surfaces of the adapter component 11 or on the intensifier part and working part, starting from the mounting position according to FIG. 11, a mounting which is rotated by 180 angular degrees can be realized.

(39) In the same way, starting from a mounting position of the intensifier part 9 on the adapter component 11, the intensifier part 9 can be screwed on in a manner offset by 90, 180 and 270 angular degrees in relation to the central axis of the opening 30 in the adapter component 11. Therefore, a multiplicity of different mounting situations are created by means of the assembly of the parts 8, 9 and 11.

LIST OF DESIGNATIONS

(40) 1 Pressure intensifier 2 Working part 3 Intensifier part 4 Housing 4a, 4b, 4c Housing sections 5 Working piston 6 Housing 7 Connecting section 8 Working part 9 Intensifier part 10 Pneumatic control unit 11, 11a, 11b Adapter component 12 Intensifier part 13 Working part 14 Hose adapter component 14a Hose section 14b, 14c Hose coupling part 15, 16, 17 Hose adapter component 15a, 16a Hose coupling part 18 Pressure intensifier 19 Working part 20 Intensifier part 21 Adapter component 21a Connecting line section 22 Central outlet 23 Cylinder cover 24 Hole pattern 24a Screw-in holes 25 Cylinder cover 25a Planar surface 26 Hole pattern 27 Fastening screw 28 Opening 29 Main face 30 Opening 31 Fastening screw 31a, 31b Screws 32 Tie rod 33 Cylinder cover 33a, 33b Planar surface 34 Main face 35 Opening