HOISTING SYSTEM FOR THE RAISING AND LOWERING AND/OR SHIFTING OF LARGE ONES LOADS

Hoisting system for the raising and lowering und/oder shifting large loads description the invention concerns a hoisting system for the raising and lowering und/oder shifting large loads, which has a number of individually controllable, at the same time to several activatable stroke modules, which a one hydraulic each remote cylinder with a piston have, which forms a one-sided mobile delimitation of a driving pressure area, by whose Druckbeauf schlagung of the pistons the execution of a working stroke relative to the housing of the cylinder adjustable are, and during its pressure relief of the pistons in the sense of the execution of a return to a basic position in the opposite direction, whereby each remote cylinder is equipped with a way sensor, the input signals produced, STDC0075 is adjustable Einheiten of the Kol- of ben stroke evaluablely are.

Hoisting systems of this kind are generally used e.g. for the raising and/or lowering bridge segments, for positioning building parts or buildings, if necessary to position corrections, which are e.g. necessary, if in Fundamentbereich of a building sinkings and associated inclinations of building parts arise, which digungen too Beschä- lead can.

A such hoisting system is on the Internet site of the company Enerpac (www. enerpac. com) in the detail describes.

With the well-known hoisting systems is in each case a group of remote cylinders, which should be accessible a " synchronous " mode of operation, i.e. are essentially at the same time and with same stroke operable to be, a common printing supply aggregate assigned, which is hydraulically connected with the individual remote cylinders by a control valve block, by means of <Desc/Clms PAGE NUMBER 2> flexible pressure oil hoses to them individually assigned the control valves Steuerventilblocks angeschlossen are.

To that extent according to structure and function described, admitted hoisting system is afflicted with at least the following disadvantages: Installing one solchen Hubsystems is connected with a substantial work expended, which is essentially to moving the hydraulic lines due.

If the load is not evenly on distributable by per a remote cylinder represented support points, i.e. that the load portions abgestützen of the remote cylinders are different after the amount, an even " synchronous " load rise at all remote cylinders is no longer in principle possible separates if necessary still approximate mög lich, z. B. in such a manner that those remote cylinders, which must unfold supported load portions because of different amounts of you according to different stroke forces are headed for also at different times for the execution of one Teilhub-Bewegungen. In the result thereby both for feed motion (stroke) and for return phases more Zeitund control expenditure benötigt.STDC0291 will exclude, is necessary phases as far as possible around here a structure of unwanted tensions in the load material it in the accepted case to divide the stroke procedure into a large number of partial strokes which can be linked however again with a substantial time requirement.

Task of the invention is from there a hoisting system the entrance kind mentioned in such a way to be improved that both the time requirement for its installation is reduced, and a comparatively more rapid change of position of the load by means of the hoisting system is made possible. <Desc/Clms PAGE NUMBER 3> This task is solved according to invention by the characteristic characteristics of the patent claim 1.

Because from this each remote cylinder is equipped with its own printing supply aggregate as well as its own electrohydraulical stroke control unit, whereby the remote cylinder, the printing supply aggregate including its storage vessel and constructionally a compact stroke module forms the electrohydraulical control unit, whose function control exclusively effected via electrical control signals, whereby the printing supply aggregate a high-pressure pump, this propelling electric motor, a pressure relief valve and a storage vessel enclosure, together with which electrohydraulical control unit is trained as a building group mounted laterally at the remote cylinder housing, their expansion measured toward the central longitudinal axis of the remote cylinder is smaller than the minimum measured between the supporting levels of the remote cylinder height of desselben.STDC0765 thereby is the hoisting system into a number of as it were self-sufficient stroke modules subdivided, which require among themselves no hydraulic connection, but regarding their cooperation only a coordinated, “simultaneous " function only require a suitable electrical control. Owing to the system-dependent omission of hydraulic connections Hubmodule among themselves ist substantially more simply and also afflicted with a substantially smaller risk of Installationsmängeln and from there also in the enterprise susceptibly to a damage to one the remote cylinder less, there no hydraulic function coupling between the individual stroke modules besteht.STDC0133 the hoisting system according to invention from there also a relatively higher insurance of operation offers the installation of the hoisting system according to invention compared with the well-known system.

As far as, under the number of the stroke modules appropriate number of electrically propelled pumps, opposite which admitted system a relevant additional expenditure add is, these however by the cost savings under economic criteria, due to shorter Installations-und disassembly times, far overcompensated. <Desc/Clms PAGE NUMBER 4>

A hoisting system in accordance with the characteristics of the requirement 2 rapid traverse drives assigned separately with the remote cylinders, which are appropriately so laid out that the pistons of the remote cylinders can be driven rapidly into plant with the object which can be moved, their driving power however are not sufficient to obtain the load stroke enterprise have the advantage, which independently of an initial at the beginning of the remote cylinder pistons these very fast into a " common " starting position be brought cannot, starting from which only the load stroke is to be supervised, that to a desired positioning of the load leads soll.STDC0342 for a precise stroke control is it from there necessarily that the individual remote cylinders are brought into a defining starting position; as starting point for the stroke Messung the Anlageposition of the remote cylinder piston at the load is selected and the stroke is counted out as it were by this position.

In preferential arrangement of the stroke modules the rapid traverse drive is designed as a hydraulic rapid traverse cylinder, preferably as double acting hydro cylinder, integrated into the respective remote cylinder, which carries the piston forward of the remote cylinder in the retreat enterprise as it were.

By the characteristics of the requirements 5 and 6 a favourably simple organization of such is indicated, into the remote cylinder of integrated rapid traverse cylinder.

With the organization of stroke modules of a hoisting system according to invention outlined by the characteristics of the requirement 7 the remote cylinder pistons can opposite the rapid traverse cylinders tilting motions with small angle deflections would drive out. Thus slight deviations of a parallel process of these surfaces in the sense of a wide distribution Vorschub-und can become balanced reaction forces during in each case majority laminar support of the remote cylinder housing at an even counter bearing surface and/or the remote cylinder piston at an even supporting surface of the load. <Desc/Clms PAGE NUMBER 5>

Here sufficient, simple organization of the Hubzylin is derkolbens indicated by the characteristics of the requirement 8 the practically arising needs fills.

If the printing supply aggregate of the respective stroke module is designed as nullometrisch led high-pressure pump, in particular be used by controlling of the number of revolutions of a driving motor of the pump in a simple manner for the controlling Eil-und load course movements of the rapid traverse drive and/or the remote cylinder of the respective stroke module as piston pump, like in accordance with requirement 9 planned, this counts e.g. can. A in this connection simple possibility is indicated by the characteristics of the requirement 10, also at least the approach an evaluation of the heading for signals for the engine and/or the pump in units of the implemented and/or the stroke which can be implemented made possible.

For the function control of the hoisting system in sinnfälligerweise geeignete printing actual value signals, which are processable to position desired value signals by means of an electronic control unit on the basis plausible linkages, 12 can be won by means of electronic or electromechanical pressure sensors in accordance with the requirements 11 and.

Further details of the invention result from the following description of special remark examples on the basis the design. Show: Fig. 1 a first remark example by a stroke module reprä sensierten of hoisting system for raising and lowering of large loads, with in the pistons of a remote cylinder integrated Eil- of course cylinder, including for function control a planned. electrohydraulical control unit, in schematically simplified block diagram representation, <Desc/Clms PAGE NUMBER 6> Fig. 2 a schematically simplified opinion of the stroke module in accordance with Fig. 1 for the explanation of a typical employment, Fig. 3 a further remark example of a stroke module of a hoisting system according to invention in one the Fig. , schematically Schnitt-bzw.STDC0033 block diagram representation simplified 1 appropriate.

In the Fig. 1 altogether with 10 designated shear modulus actualfor a hoisting system meant, with very heavy and also the volume after large loads, e.g. Sections of bridges, raisable and lowerable are, whereby such a system a multiplicity (N) of such hydraulic stroke modules 10 to cover can.

The stroke module 10 enclosure for his part a linear remote cylinder altogether marked with 11, a printing supply aggregate with an electrically propelable high-pressure pump 13 and one altogether with 14 designated electrohydraulical control unit, by means of those, altogether marked with 12, the different functions of the stroke module of 10 and further, not dargestellter stroke modules des system controllable sind.

The remote cylinder 11 is designed as simply working linear cylinder, which has a cylindrical tropfförmiges housing 17, in which a piston 18 is pressure tight adjustably arranged, which forms an axially mobile Abgren- zung a driving pressure area 19, which is formed axially gehäusefest by the ground 21 of the topfförmigen cylinder housing 17. The piston ben18 is rotationally symmetrically trained concerning the central longitudinal axis 22 of the remote cylinder 11.

Linking of driving pressure into the driving pressure area 19 takes place, in a following load lifting enterprise which can be described still more near in that <Desc/Clms PAGE NUMBER 7> the piston 18 toward the arrow 23 relative to the housing 17 " outward " moved and an only schematically suggested load 24, at which the piston 18 with a supporting extension 26 attacks, opposite a counter bearing 27, at which the remote cylinder 11 with its housing bottom 21 is supported, be raised muss.STDC0567 into the remote cylinder 11 is structurally integrated altogether with 28 characteristic rapid traverse cylinders, that it made possible to use by the pump 13 made available the hydraulic medium flow rate for rapid starting of that configuration of the remote cylinder 11 in which these as it were between the counter bearing and the load 24 in each case supporting arrangement “clamped” - is and which can be introduced Hebevorgang thereby, that now the " large " driving pressure area 19 of the remote cylinder 11 with driving pressure is subjected.

The rapid traverse cylinder 28 is realized as a double acting linear cylinder with piston rod 29 withdrawing from the housing, those of a flatcylindrical, flanschförmigen piston 31 goes out on one side, which defines cylindrical Hohlraumes</RTI> of the piston 18 of the remote cylinder 11 a cylindrically topfförmigen driving pressure area 32 against an annular space 33 within eiines pressure tight, which is axially interspersed by the piston rod 29, which is firmly connected to STDC0073 a shift with the cylinder housing in the central range of the ground of the Hubzylindergehäusses 17, so that during an application of pressure of the cylindrical driving pressure area 32 of the rapid traverse cylinder <RTI ID=0.0>28 is expenditure-practiced on the piston 18 of the remote cylinder 17 the piston 18 17 Kraft out urgent from the housing, those, for itself seen, of the Piston causes 17 toward the arrow 23.

The rapid traverse cylinder 28 is in such a way arranged and arranged that its central axle coincides with the central longitudinal axis 22 of the remote cylinder 11.

For the sliding adjustable sealing of the piston 18 of the remote cylinder 11, which forms as it were the housing of the rapid traverse cylinder 28, opposite its piston rod 29 a ring seal 34 is intended, by one <Desc/Clms PAGE NUMBER 8> Enular groove of ringscheibenförmigen covering ILS 36 is taken up, by means of whose the annular space 33 of the rapid traverse cylinder 28 pressure tight opposite - for his part circular driving pressure area 19 of the remote cylinder 11 is defined. For this additionally needed seals elements are not particularly represented to the simplicity, for the sake of the representation.

By alternative application of pressure and discharge of the bodenseitigengrösservolumigen Antriebsdruckraumes 32 of the rapid traverse cylinder 28 as well as its annular space 33, 24 in addition arranged are controllable as well as by this again Eil-Vorschub-und-Rückzugsbewegungen of the piston 18 of the remote cylinder 11 away arranged, those under the development of comparatively small forces, but however with relatively high rate of motion to take place can on the load.

For the rise of a heavy load additionally the circular driving pressure 19 of the remote cylinder 11 with pressure subjects 24, which is required larger than 28 forces distance-oldable by means of Eilgangzy- linders, whereby printing media is introduced by means of the high-pressure pump 13 of the printing supply aggregate 12 over the stroke control port 37in that-majority-laminar limit driving pressure area 19 of the remote cylinder.

Zur " slow " Absenkung of a load 24 is expenditure-led printing media, which is, depending upon the amount of the load 24 at a more or less high pressure, over the return connection 38 of the remote cylinder 11 from its driving pressure area 19.

In the rapid feed enterprise of the rapid traverse cylinder 28, to the piston 18 on the load 24 too moved, until it arrives at this at the support, printing media promotes itself by means of the pump 13 to the bottom driving pressure area 32 of the rapid traverse cylinder 28, whereby the printing media flows through a control path 39 interspersing the piston rod 29 in axial direction, an actuating pressure connection 41 of the rapid traverse cylinder 28 with that <Desc/Clms PAGE NUMBER 9> bottom driving pressure area 32 connects and is directly to the high pressure exit 42 of the electrohydraulical control unit 14 attached, which as it were between the rapid traverse cylinder 28 and/or the remote cylinder 11 and the printing supply aggregate 12 switched ist.STDC0659 during the bottom pressure chamber 32 takes up the rapid traverse cylinder 28 printing media, such from the annular space 33 Eilgangzylinders 28 ver- pushes and over a further control path 43 of the piston rod 29, which the annular space 33 with the retreat control port 44 of the rapid traverse cylinder 28 connects, to the electrohydraulical control unit 14 expenditure-led, in which this printing media stream is added as it were again the printing media stream flowing into the bottom pressure chamber 32 of the rapid traverse cylinder 28, according to the Differenzial operating phase of the rapid traverse cylinder 28 given in this operating condition.

The electrohydraulical control unit 14 has a high pressure Versorgungsanschluss 46, as well as over which the initial pressure Druckversor- gungsaggregat 12 into the electrohydraulical control unit 14 is linkable a return connection 47, which is directly with the pressure-free storage vessel 48 of the printing supply aggregate 12 connected.

The high-pressure pump 13 of the printing supply aggregate 12 is connected in usual way by an entrance check valve 49 with the storage vessel 48 and by Ausgangsrückschlagventil 51 with high pressure Versorgungsanschiuss 46 of the electrohydraulical control unit 14, whereby that these and the printing supply aggregate 12 are combined into Bau-und functional unit, with also the printing supply aggregate is presupposed 12 control function mediated.

The printing supply aggregate 12 is equipped with a pressure relief valve 52, which is switched between the high pressure power supply 46 and the storage vessel 48. The value of the pressure, to which the initial pressure of the printing supply aggregate is limited, is by in <Desc/Clms PAGE NUMBER 10> place 53 of the pressure relief valve 52 to the pre-loading of a valve spring adjustable. In a typical interpretation of the stroke module 10 the maximum initial pressure of the printing supply aggregate given in advance by attitude of the valve spring 53 amounts to 12,660 bar.

The electrohydraulical control unit 14 covers an electrically controllable function control valve 54, which has two alternative function positions 0 and I, which are assigned to the alternative directions of the relative motions, which the piston would drive 18 out of the remote cylinder 11 relative to its housings 17 can.

Funktionssteuerventil 54 is as 3/2-Wegemagnetventil trained, which works as transfer valve, in its alternative function positions 0 and) defined cross-sections of the opening of the flow paths opened in each case given sind.

Funktionssteuerventil 54 pushed will in dead condition of its tax magnet 56-durch the effect of a linked up valve spring 57 into its basic position 0, in which with the high pressure power supply of the printing supply aggregate 12 connected p Versorgungsanschluss 58 is connected by a flow path 59 released in this function position 0 communicating with the branch of you connection 61 Funktionssteuerventils 54, which is connected by an output check valve 62 with the high pressure exit 42 of the electrohydraulical control unit 14, whereby this output check valve 62 is closing by relatively higher pressure at the branch of you exit Funktionssteuerventils 54 than at the high pressure exit 42 bzw.STDC0137 the actuating pressure connection 41 of the rapid traverse cylinder 28 in opening direction headed for and otherwise.

In this basic position 0 over Funktionssteuerventil to 54 a supply-lateral T-Rücklaufanschluss 63 Funktionssteuerventils 54 is, that <Desc/Clms PAGE NUMBER 11> connected with Rücklaufanschluss 47 of the electrohydraulical control unit 14 and/or the printing supply aggregate 12 is locked, against the branch of you connection 61 Funktionssteuerventils 54.

In the basic position 0 Funktionssteuerventils 54 it is thus druck-Versorgungsanschluss 46 of the printing supply aggregate 12 and/or the electrohydraulical tax A HIt 14 by Ausgangs-Rückschlagveritils 62 with Steuerdruckanschluss 41 of the rapid traverse cylinder 28 connected for the high and thus the pump initial pressure into the driving pressure area 32 of the rapid traverse cylinder 28 linkable.

The high pressure exit 42 of the electrohydraulical control unit 14 is further over a connection check valve 63 attached to the retreat control port 44 of the rapid traverse cylinder 28 of the Hubzyliners 11, whereby this connection check valve is closing 63 by relatively higher pressure at the high pressure exit 42 elektgangzylinders of the 28 into its OffenStellung steered and otherwise. In particular the connection check valve 63 is subjected by the high initial pressure of the pump 13 in opening direction.

Further the high pressure exit of the electrohydraulical control unit 14 is attached over in pressure reducing valve 64 with the stroke control port 37 of the " large " annular space 19 of the remote cylinder 11, represented as check valve, over which this annular space 19 a pressure is linkable, which is lower around a defined amount Ap than the pressure linkable over the high pressure exit 42 into the wide limited " bottom " driving pressure area 32 of the rapid traverse cylinder 28, which essentially corresponds to the initial pressure of the printing supply aggregate 12.

Between the return connection 38 of the remote cylinder 11 and the Rücklauanschluss 47 of the electrohydraulical control unit 14 is in as back <Desc/Clms PAGE NUMBER 12> impact valve represented inflation valve 66 switched, over that, if the piston 18 of the remote cylinder 11 is shifted by activating the rapid traverse cylinder 28 in the sense of an enlargement of the annular space 19 of the remote cylinder 11, printing media from the storage vessel 48 of the printing supply aggregate 12 into this annular space 19 nachströmen-und these filled can.

The basic position 0 of the function expensive valve 54 is assigned to those operating phases of the remote cylinder 11, in which the piston 18 in rapid traverse on the load 24 is too moved or these in the load stroke enterprise raises and/or shifts.

During excitation of the tax magnet 26 of the function expensive valve 54 with a tax output signal of the electronic control unit 16 the function expensive valve 54 into its Funktionsstellung I, in which the p Versorgungsanschluss 58 against the branch of you exit 61 of the function control valve 54 locked off, arrives these however by a discharge opening flow path 67 released now with the T-Rücklaufanschluss 65 of the Funkti ons-Steuerventils 54 actual those Funktionsstellung I of the function control valve is connected that retreat operating sinking of the load and/or express retrograde movement of the piston 18-des of remote cylinder 11 assigned.

Between the return connection of the remote cylinder 11 and the Rücklauanschluss 47 of the printing supply aggregate 12 switched be in hydraulic parallel connection to the inflation valve 66 an adjustable throttle 67 and one R-S tes-Ablassventil 68 comprehensive hydraulic series connection, over which in case of the sinking of the load 24 printing media from the annular space 19 of the remote cylinder 11 can divert controlled.

Likewise in hydraulic parallel connection to the inflation valve 66 and/or that the throttle 67 and the first Ablassventil 68 comprehensively branch of drain of the electrohydraulical control unit 14 is Eilgang-Ablassventil 69 vorge <Desc/Clms PAGE NUMBER 13> see, over which in the express retreat enterprise of the remote cylinder 11 printing media from its annular space 19 can divert to the printing supply aggregate.

" Load " - drain valve 68 is trained as pressure controlled 2/2-Wege- transfer valve with closing basic position and open switching position. The mobile valve body Last-Ablassventils 68 is pushed on the one hand toward the pre-loading of a valve spring 71 and on the other hand toward admission of a control surface 72 with the pressure Pa dominant at the branch of you exit 61 Funktionssteuerventils 54 into the closing basic position 0; STDC0752 by admission einer small px- control surface of the valve body Last-Ablassventils 68 with the initial pressure of the printing supply aggregate 12 is obtained switching force directed opposite to Kraft of the valve spring 71, which pushes the valve body into offene-Stellung I of the Last-Ablassventils 68. That control surface 72, by whose admission with the actuating pressure Pa the valve into its basic position drängende " close " - Kraft one produces, is the amount after more largely than the control surface 73, those the initial pressure px of the printing supply aggregate 12 suspendable is.

The rapid traverse drain valve 69 is likewise trained as pressure controlled 2/2-WegeUmschaltventil with closing basic position 0 and constant switching position I. Widerum by the 2/2-Wege-Ventilsymbol represented valve bodies of the rapid traverse drain valve 69 on the one hand toward the pre-loading of a valve spring 74 and on the other hand toward application of pressure of a control surface 76 with in the " large " annular space 19 of the remote cylinder 11 dominant pressure is pushed into the closing basic position of the valve and toward application of pressure of a counter surface 77 with the initial pressure px the printing supply aggregate into its passage Stellung I, whereby similar to Last-Ablassventil 68, STDC0241 the amount with the initial pressure of the printing supply aggregate subjectable <Desc/Clms PAGE NUMBER 14> Gegenfläche 77 is significantly smaller than the amount of the control surface 76 subjected with the pressure in the annular space 19.

The stroke module 10 is equipped with an electromagnetic or electronic pressure sensor 78, that and indirectly an electrical output signal usable evaluable by means of the electronic control unit 16 for the controlling of the stroke module 10 produced, which is a measure for in the annular space 19 of the remote cylinder 11 dominant pressure.

The stroke module 10 is the moreover with an only schematically suggested, altogether Weg-Mess-System marked with 79 equipped, which generates 18 11 electrical output signals characteristic in the remote cylinder for the position of the piston, made of whose processing the information about the stroke is profitable, which the load 24 in the process of a duty cycle experiences. Here it is, if the Weg-Mess-System 79 is designed as absolute absolute, its output signals a measure for the deflection of the piston 18 from e.g. minimum volume of the annular space 19 an appropriate basic position is appropriate.

Deviating from the schematized " diagram " - representation of the Fig. 1 are with the stroke module 10, as schematically simplified in the Fig. 2 represented, remote cylinders 11, which electrohydraulical control unit 14 and also the printing supply aggregate 12 into a compact construction unit combined, in such a manner that the electrohydraulical control unit 14 and the printing supply aggregate 12 laterally by the remote cylinder 11 are arranged, in particular in such a manner that the electrohydraulical control unit 14 and the printing supply aggregate 12 in one mounted to the housing 17 of the remote cylinder 11 common housings sind.STDC0848 firmly here are accommodated connection channels 172 and 173, which connect the electrohydraulical control unit 14 with the remote cylinder 11 implemented as control block toward the central axle 22 of the remote cylinder 11 seen, in a distance from the exterior surface 129 of the cylinder ground 21 arranged, with that the stroke module 10 z. B. on a basic foundation <Desc/Clms PAGE NUMBER 15> is supportable, and those are regulatory the electrohydraulical control unit 14 as well as the printing supply aggregate of 12 taking up Gehäuseteile between that-parallel-even 81 and 82, their distance hm! n minima- ler height of the remote cylinder 11 corresponds, whereby the height that laterally geord- neten Gehäuseteile are smaller than this minimum height hmin the remote cylinder 11.

For the explanation of a typical kind of the use of the stroke module 10 with it went out that a load 24 first around a stroke has is to be raised, e.g. for the purpose to be able to arrange this load temporarly carrying supports thereafter the load 24-nocheinmal to raise, around those.

Again to remove to be able and then the load a defined amount Hs into a final position lower, in that it remain it can lower supports and then the piston 18 of the remote cylinder 11 so far that the stroke module 10 from the range below the abgestützen load 24 can be removed comfortably.

As long as the electrical driving motor 15 is not bestromt the printing supply aggregate the 12 and the pump does not promote 13 accordingly and the function control valve 54 in its basic position 0 is held, the piston 18 of the Hubyzylinders 11 is as it were hydraulically fixed in its position; STDC0710 the drain valves 68 and 69 their closing basic position take there and also the inflation valve 66 as well as the pressure reducing valve 64 and the output back schlagventil 62 of the electrohydraulical control unit 14 by one etwai- towards pressure in the annular space 19 and/or in the driving pressure area 32 Eilgang- of cylinder 28 in check direction subjected are, can neither from the annular space 19 nor from this driving pressure area 22 hydraulic medium flow off, with the consequence that the piston 18 of the remote cylinder 11 against one " downward " - movement in the sense of a decrease of the volume of the annular space 19 is secured. <Desc/Clms PAGE NUMBER 16>

, From this if " peace " becomes outgoing - condition, which activates pump 13, so promoted will in the basic position Funktionssteuerventils 54-Druckmedium to the pressure chamber 32 of the entrance cylinder 28, and printing media from the annular space 33 of the entrance cylinder. it displaces 28, with the consequence that the piston 18 of the remote cylinder 11 moves toward the arrow 23. The printing media displaced out of the annular space 33 flows as it were to Hochdruck-Versorgungsanschluss 46 of the electrohydraulical control unit 14 back and to the printing media river flowing from the pump 13 to the driving pressure area 32 of the express cylinder is added.

By on the load the 24 adjusted resulting from this " upward " - movement of the remote cylinder piston 18 becomes larger its annular space 19, with the consequence that over the inflation valve 66 printing media from the storage vessel flows 48 into this annular space 19. The piston 18 moves, propelled by the rapid traverse cylinder 28 with relatively large speed with moderate pressure in the driving pressure area 32 towards the load 24.

Of it that the Gewichtskraft of the load 24 is significantly larger than 28 producible by application of pressure of the driving pressure area 32 of the rapid traverse cylinder, for the rapid traverse movement of the cylinder piston 18 necessary Kraft the piston 18, as soon as it hits the load 24, remains outgoing standing first, until the initial pressure of the printing supply aggregate 12 increased so far that the pressure reducing valve 64 addresses and can over this valve of the high pressure exit 42 of the electrohydraulical control unit 14 from printing media over Hub-Starranschluss 37 of the remote cylinder 11 its annular space 19 enter, in which in the consequence a pressure adjusts itself, which is 30 bar lower around the difference of pressure Ap z.STDC0190 B., as in the bottom driving pressure area the 32 of the Rapid traverse cylinder 28 and/or at the high pressure exit 42 of the electrohydraulical control unit 14 dominant pressure.

This operating condition of the stroke module 10 is recognizable by the fact that the printingcharacteristic output signal of the pressure sensor 78 one constantly <Desc/Clms PAGE NUMBER 17> it signals increasing pressure against what the stroke-characteristic out does not change gangssignal way Messystems 79.

So that in this " load " - stroke enterprise Eilgang-Abwärtsventil 69 into its flow position to arrive cannot, its valve spring is 74-soweit linked up that you in opening-working Kraft, which can hold ID=0.0>beaufschlagung of the " small " Steuerfläche</RTI> 77 with Ausgangsdrück of the pump 13 with the pressure " small " Steuerfläche 77 wirkt.STDC0350 with increasing pressure in the annular space 19 Eilgang-Ablassventil 69 reliably closed, there for these printing by its effect on the larger control surface 76 an additional “closes” - Kraft unfolds, those Eilgang-Ablassventil 69 in its Sperrstelllung 0 holds.

" Load " - drain valve 68 remains gig in the operating phase mentioned already alone therefore in its locking position, because the initial pressure Pa affects ID=0.0>72</RTI> and 73 of the valve both control surfaces Last-Ablassventil 68 in its Sperrstellung holds 72 resulting, larger <RTI ID=0.0>Steüerkraft. reliably, unabhän-</RTI> of which " close " - Kraft by its tax feather/spring 71 unfolded, those for the amount after smaller closing force to accordingly be designed knows than the valve spring 74 of the rapid traverse drain valve 69.

For the completion of the load stroke enterprise it is sufficient to switch the pump off 13 on which the piston 18 of the remote cylinder to go remains.

Now if the load 24, e.g. around a fraction of the load stroke implemented before, is to be lowered then Funktionssteuerventil becomes 24 by control of its tax magnet 56 with an output signal. the e lektronischen control unit 16 into its Funktionsstellung I switched, in that now P-Versorgungsanschluss 56 against the control port 61 <Desc/Clms PAGE NUMBER 18> the function control valve 54 locked and this however with the tank return connection 65 by the flow path 70 is connected, which entails 68 effected into its Durchflussstellung I that the " larger " control surface 72 <RTI of the ID=0.0>Last-Ablass-Ventils 68 is balanced and because of than small presupposed resetting force its valve spring 71-ein according to low actuating pressure px, STDC0646 with that the Gegenfläche 73 is subjected, been sufficient, around the load drain valve umzuschalten.</RTI> this change-over with the restarting of the pump 13, so that their initial pressure affects x-Steuerfläche 73 Last-Ablassventils 64 and this arrives against the resetting force of the valve spring 71 into Durchfluss-Stellung I. In of this operating situation flows printing media of the pump 13 over Hochdruck-Versorgungsanschluss 46 of the electrohydraulical control unit.

14 to the retreat control port 44 of the rapid traverse cylinder 28 in its annular space 33, whereby on the piston 18 a Kraft is expenditure-practiced against the direction of the arrow 23. Additionally work against the direction of the arrow 23-die load 24 on the piston 8, whereby printing media from the annular space can divert 19 over the throttle 67 and the load drain valve 68 to the storage vessel 48 of the printing supply aggregate arrived into its Offenstellung I, whereby the flow rate flows by the effect of the throttle 67 limited wird.STDC0403 printing media, which is displaced out of the bottom driving pressure area 32 of the rapid traverse cylinder 28 to the high pressure exit 42 of the electrohydraulical control unit 14, over the pressure reducing valve 64 " back " into the annular space 19 of the remote cylinder 11 and from this over the return connection 38, the throttle 67 and the reading Ablassventil 68 to the Vorwärtsbehälter 48.

Eilgang-Ablassventil 69 remains closed and this so long, as long as the load affects the piston 18 of the remote cylinder 11 and prevails because of the throttling of output current a considerable pressure in the annular space 19 of the remote cylinder 17, as this pressure is sufficient, around the piston of the off lassventils 69 with support of the valve spring 74 against Kraft, those from the admission of the Gegenfläche 77 with the initial pressure of the Pum <Desc/Clms PAGE NUMBER 19> PE 13 is unfolded to hold in the locking position which is possible due to usual expert measures by suitable interpretation of the rapid traverse drain valve 69.

The load 24 achieved its deepest intended position, - z. B. through Aufla- ge on a retaining structure, so that further lowering of the piston 18 of the remote cylinder 11 leads to taking the piston off from the load 24, then enters a drastic reduction in pressure, which leads now to the fact as consequence of it the annular space 19 of the remote cylinder 11 that rapid traverse will overcome Ablassventil 69 into its Durchflussstellung I gesteuert, because the initial pressure of the pump generated by far before through Druckbe- impact of the control surface 76 now in the same direction with the valve derkraft 74 arranged closing force and will steer rapid traverse Ablassventil 69 into its Offen-Stellung, STDC0444 in that printing media from the annular space 19 of the remote cylinder 11 as it were unhindered to Storage vessel 48 to divert can; in the same way leaking out hydraulic medium can be supplied to the hydraulic medium stream from the bottom driving pressure area 32 of the rapid traverse cylinder, which is led for the controlling of the express drain enterprise by means of the pump 13 into the annular space 33 of the rapid traverse cylinder 28 by way of the check valve 63.

In the Fig. 3, on their details now purchase is taken, represented, altogether remote cylinders marked with 111 is according to structure and function on the basis the Fig. 1 remote cylinders 11 described to a large extent similarly and can also with on the basis the Fig. 1 described, electrohydraulical periphery, i.e. the printing supply aggregate 12 and the electrohydraulical control unit 14 to be appropriately operated.

Also with the remote cylinder 111 a cylindrical topfförmiges, altogether with 1st 17 designated, housing is intended, within its load drive of assigned pistons 118 is pressure tight adjustably arranged and <Desc/Clms PAGE NUMBER 20> the axially mobile delimitation of a load driving pressure area 119 forms, which is limited gehäusefest by the housing bottom 112.

For the remote cylinder 111 is provided that the piston 118, even if it in eine " reason " - Stellung is pushed back, which corresponds to a minimum volume of the load driving pressure area 119, with the housing bottom 112 turned away " outside " supporting section 118/1 over the free, circle-circular front surface 121 of the tubular coat 117/1 of the cylinder housing exceeds, or in this position its outside free front surface 122 if necessary in the level of the free Ringstirnfläche 121 of the housing coat 117/1 runs.

The piston 118 has outwardly the form of a truncated cone, whereby the cone angle, which a Mantellinie of the cone lateral surface 123 with the central longitudinal axis 22/1 includes, is comparatively small and a typical value between 2 and 3, e.g. a value of 2, 5 has ; in direct proximity that the diameter after larger " internal " even delimitation surface 124 of the piston 118 has these a peripheral enular groove 126 the one altogether with 127 designated ring seal takes up, by means of those the drive piston 118 is sliding adjustably in the housing coat 117/1 sealed.

The ring seal arrangement 127 is in such a way arranged that it, if it is inserted into the groove 126 stands under a stretch pre-loading and is so far squeezed together, if the piston 118 into the housing 117 is inserted in radial direction that both between the housing coat 117/1 and the outside gasket 127/1 and between the outside gasket 127/1 are obtained and the internal gasket 127/2 and also between this and the reason of 126/1 of the enular groove 126 a good sealing effect and that this poetry remains also, if the piston in the housing 117 is somewhat tilted within a range limited given by the cone angle and. <Desc/Clms PAGE NUMBER 21>

This Kipp-Freiheitsgrad is made possible that the piston 118 with its free front surface 122 wide on a even-laminar limited load 24 can set itself, if the remote cylinder can support 129 of the housing bottom 112 at a even-laminar limited foundation wide with the lower delimitation surface as counter bearings, even if its supporting surface does not run accurately parallel to the even-laminar lower surface of the load 24.

For in the Fig. 3 altogether rapid traverse cylinders marked with 128, again training is as double acting linear cylinders provided, one-sided with piston rod 132 withdrawing from the housing 131, which is firmly with the housing 117 of the load remote cylinder 111 connected to nem flanschförmigen piston 133, which interspersed 132 within the rapid traverse cylinder housing 131 one of the piston rod axially, and with ei- bar-lateral annular space 134 against a topfförmig cylindrical driving pressure area 136 pressure tight. and axially mobile defines, which is radially by a cylindrical-tubular Gehäuseteil 137 and axially by one into tubular Gehäuseteil 137. the closely used floor part 138 final.

The flanschförmige piston 133 of the rapid traverse cylinder 128 is formed by a threaded ring 133/1, which is screwed onto a thread extension 133/2 of the piston rod 132, whereby by the screw connection a sufficiently close connection between the piston threaded ring 133/1 and the piston rod 132 is obtained.

Housing-laterally the piston is 133 sealed by means of an outside, piston-firm ring seal arrangement 139 against the central, in each case the housing-firm radial delimitation of the pressure chambers 134 and 136 of the rapid traverse cylinder 128 screen end housing bore 141 of the rapid traverse cylinder housing 131. <Desc/Clms PAGE NUMBER 22>

The sealing relative to the piston rod 122 of the sliding adjustable cylinder housing 131 of the rapid traverse cylinder 128 opposite the piston rod 132 one is intended gehäusefeste " internal " Ringdichtungsanordnung 142, which is arranged within the short drilling section 143 that the Bo denteil 138 opposite lying arranged final front wall 144 of the housing 131, by which the piston rod 132 of rapid traverse Zylinderkolbens passes through.

The housing 131 of the rapid traverse cylinder 128 is arranged within the piston 118 of the load remote cylinder 111 in a altogether topfförmigen cavity 146, which is on one side der the load turned side-locking altogether with 148 designated conclusion flange bound by, altogether a step drill marked interspersing the piston 118 in axial direction with 147 and this on, at whose inside 149 the housing 131 of the rapid traverse cylinder 128 with flach-kalottenförmig gestäl- teten exterior surface of the Bo trained in the kind of a plan convex lens denteils 138 is on one side axially supported.

Further the housing 131 Eilgang-Zylinders 128-gleichsam is axially supported in opposite direction on the internal radial Ringschulter 151 the cavity 146 of the drive piston 118 limiting drilling wall, at which the housing 131 of the rapid traverse cylinder is supportable 128 with a radially outside housing stage 152.

The floor part 138 is over a flexible sealing ring 153, preferably O-Ring, at a narrow, internal Ringschulter 154 of the housing 131 of the rapid traverse cylinder 128 supported, those between the housing bore 141 and a short, internal drilling final stage 156 of the cylinder housing 131 conciliatory one, the short final section 157 of the altogether tubular rapid traverse cylinder housing 131 interspersed, which surrounds the flat-convex Bo denteil 138, its diameters d/1 slightly smaller is than the diameter d/2 of the short Bohrungsendstufe 156, so that between those <Desc/Clms PAGE NUMBER 23> more ser and the floor part 138 a small radial play, whose amount however only a small fraction amounts to the radial width of the internal Ringschulter 154 of the housing 131, z.STDC0031 B. is present 1/20 to 1/10 the same.

Also the diameter d/3 of a " disk-shaped " centring employment 158 of the outer-laterally curved floor part 138 only short in axial direction is around a comparable amount smaller than the light diameter d/4 of the central drilling 141 of the rapid traverse cylinder housing 131, so that a play is present, owing to the elasticity of the gasket 153 small relative motions of the floor part opposite 138 cover-hurries 137 of the rapid traverse cylinder housing 131 made possible.

The rapid traverse cylinder 128 is in altogether topfförmigen, in radial direction by the step drill 147 and in axial direction the conclusion flange 148 limited Aufnahmeraum-159 on one side arranged. In this cavity that is clamped the curved floor part 138 und tubular Gehäuseteil of 137 comprehensive housings 131 of the rapid traverse cylinder 128 between Abschlussflansch 148 of the piston 118 and the Ringschulter 151 of the step drill 137 as it were flexible, whereby this restraint comes by the flexible compression of the gasket 153, which is squeezed together when the assembling of the remote cylinder 111 in axial direction something.

Abschlussflansch 148 is for his part the basic form arranged after topfförmig, in such a manner that on one side of a circular flange plate 148/1 rising, a tubular is intended coat section a 148/2, which is enclosed radially outside by a circle-circular adjustment range 148/3 of the conclusion flange 148, which is supportable on a Ringschulter 161 of the step drill 147, those between that-read-lateral-extreme drilling stage of 147/1 the large diameter D/1 of the step drill 147 and their drilling stage of 147/2 somewhat smaller diameter D/2 along telt, opposite welcher Abschlussflansch 148 by means of one into a outer <Desc/Clms PAGE NUMBER 24> ssennut 162 of its tubular coat section 148/2 assigned ring seal 163 is sealed.

Between 147/2 this-second largest-drilling-gradate and third, “middle " drilling stage 147/3 of the step drill 147 of the remote cylinder piston 118 obtain a " middle " Ringschulter 164, whose radial width corresponds to the wall thickness of the coat section 148/2 Abschlussflansches 148, so that, apart from a slot between the circular front surface of the tubular coat section, narrow in axial direction, 148/2 has and this opposite Ringschulter 164 the transmitting room 159 between the inside 149 of the conclusion flange 148 and the Ringschulter 151 of the step drill 141 practically everywhere the same light diameter D/3.

Between the middle drilling stage 147/3 of the diameter D/3 and that 118 for the diameter after smallest drilling stage 147/4 of the remote cylinder piston, at that the cylinder housing 131 of the rapid traverse cylinder. in the represented configuration of the remote cylinder 111 is axially supported for 128.

The outside diameter D/a by the smallest drilling stage of 147/4 passing through final front wall range 144 of the cylindrically tubular Gehäuseteils 137 of the rapid traverse cylinder 128, as well as the outside diameter D/m of the tubular Gehäuseteils 137 of the rapid traverse cylinder 128, compared to the diameters D/4 and D/2 that are surrounding drilling walls around so many smaller than of them light diameters selected them that the tilting motions Hubzylinderkolbens 118 are not reduced by the organization of the hurrying gangzylinders 128.

The remote cylinder 111 in accordance with Fig. 3 can be mounted as follows: <Desc/Clms PAGE NUMBER 25> As the first the piston rod 132 at the housing bottom 112 of the remote cylinder housing 117 is installed. The sealing of the driving pressure area 119 against the environment can take place here via a outer-laterally arranged poetry 166, at that the heads 167 from anchor screws 168, which are supportable relatively elongated, thread-free, stretchable clamping sections 169 to have.

From this the piston 118 into the cylinder housing 117 concerning which accurately centers central longitudinal axis 22, is inserted. A suitable position of the piston 118 for this is its support at the inside of the ground 112 of the cylinder housing 117.

From this the cylindrical-tubular housing coat 137 Eilgang- of cylinder housing 131 is slid into the internal area of the remote cylinder 111 bound by the step drill 147. Then the threaded ring 133/1 is screwed onto the thread extension 133/2 of the piston rod 132, whereby the thread interference between threaded ring 133/1 and the thread of the thread extension 133/2 " in-</RTI> nenseitig " obtain a sufficient <RTI ID=0.0>Dichtwirkung, while the ring seal 139 seals the threaded ring radially outside against the tubular housing section 137 of the rapid traverse cylinder housing 131. For screwing the threaded ring on a forked special tool is necessary, which is bringable with not represented axial bag drillings of the threaded ring in interference.

After the threaded ring 133/1 is screwed onto the piston rod 132, the sealing ring 153 is presented on the internal Ringschulter 154 of the rapid traverse cylinder housing 131 and the floor part 138 is put into the drilling final stage 156 of cylindrical-tubular covering ILS 137. From this the read-laterally arranged Abschlussflansch is inserted 148 into the drilling stages 147/1 and 147/2 and by means of the axialsymmetrically grouped fixing bolts 171, which push away read-laterally at Abschlussflansch 148 and in anchor threads intervene, those in the range of the read-lateral <Desc/Clms PAGE NUMBER 26> Ringschulter 161 arranged are fixed; STDC0552 here pushes the conclusion flange 148 the floor part 138 of the rapid traverse cylinder housing 131 in its tubular coat 137 something inside, whereby the ring seal 143 arrives into its sealing, somewhat squeezed together configuration, in which it under a pre-loading stands, which the floor part 138 and cover-hurry 137 Eilgang-Zylindergehäuses at Abschlussflansch 148, on the one hand, and by the Ringschulter 151 of the remote cylinder piston 118, on the other hand, with a minimum strength in plant holds.

The control paths 39 and 43 in accordance with Fig. 1 appropriate control paths 39/2 and 43/2, over the printing media into the pressure chambers 136 and/or 134 of the rapid traverse cylinder 128 in accordance with Fig. 3 influxes or from these to withdraw, is on attached with the remark example in accordance with figure 3 Anschlusskanäle 172 and/or 173 can closely, which leads 112 run and to the respective actuating pressure connection 41 in the housing bottom and the return expensive connection 44 of the electrohydraulical control unit 14.

These control ports 44 and 41 are arranged above the lower surface 129 of the housing bottom 112 " laterally " vom remote cylinder housing 117.

In similar way is also the stroke control port 37 and the return expensive connection 38 more appropriate Steueranschluss " seitlich arranged and if necessary with one not represent likewise in the housing bottom 112 running Anschlusskanal with the driving pressure area 119 of the remote cylinder 111 communicating connected.