DE102017004303A1 - Accumulator system - Google Patents

Abstract

An accumulator system, in particular for adjusting the gas quantity and the static prestressing pressure in a variable suspension system of a working hydraulics (38, 40, 42, 44, 58, 60) of a mobile working machine, having at least one hydraulic accumulator (12, 54), whose fluid side (28) is connectable to a fluid supply device (P) by means of at least one valve device (14), characterized in that the fluid side (28) of the hydraulic accumulator (12, 54) to a supply line (A) for a hydraulic consumer (38 - 44, 58, 60) by means of a further valve device (18, 18a - 18d) can be connected, that the supply line (A) is connected on the output side to a control valve device (22), which is connected on the input side to the fluid supply device (P), and in that the two valve devices (14, 18, 18a - 18d) are connected to a common connection point (24, 56), which is fluid-conducting with the fluid side (28) of the hydraulic accumulator (1 2, 54) is connected.

Description

The invention relates to an accumulator system, in particular for adjusting the gas quantity and the static preload pressure in a variable suspension system of a working hydraulics of a mobile machine, with at least one hydraulic accumulator whose fluid side can be connected to a fluid supply device by means of at least one valve device.

Such an accumulator system is for example off DE 10 2012 017 003 A1 known. The known accumulator assembly comprises a hydropneumatic accumulator and a further hydropneumatic pressure accumulator, wherein on the two fluid sides of a pressure accumulator with a hydraulic load and the further pressure accumulator is connectable to a supply source, and wherein the two pressure accumulators are gas-conductively coupled to each other on their gas sides by means of a regulating device , The further pressure accumulator remains, a target pressure specification for the hydraulic consumer compliant, at least a gas pressure connected to a pressure reservoir at least until a predetermined value overshooting desired pressure deviation by a regulating device until the target pressure deviation falls below the predetermined value.

DE 10 2014 000 696 A1 discloses a device for locking and for pressure adjustment for a hydraulically controllable actuator device, in particular in the form of a hoist of a working machine, from the at least one working space by means of a valve device optionally to a pressure supply device comprising a storage device, or to a discharge side, in particular a tank side, connectable is. In a control position of the valve device is at higher storage pressure of the storage device as the working pressure in the one working space of the actuator relieving this accumulator pressure to the discharge side until reaching this working pressure.

In mobile machines that are used for example in agriculture, suspension systems are provided which have a separate suspension for each individual function of the attached machine, such as a drawbar suspension, a front loader suspension, a top link suspension, a mower unloading or the like. In many different types of work machines can be used to build many individual suspension systems. It is desirable here to reduce the space requirement and the design effort, without restricting the scope of the associated work machine.

The invention is therefore based on the object to design the suspension in a usable for different functions mobile work machine with a simplified design effort and a reduced space requirement, without limiting the scope and applications of the mobile machine.

This object is achieved by a pressure accumulator system with the features of claim 1 in its entirety. Advantageous embodiments of the invention are the subject of the dependent claims.

An inventive pressure accumulator system is characterized in that the fluid side of the hydraulic accumulator can be connected to a supply line for a hydraulic consumer by means of a further valve device that the supply line is connected on the output side to a control valve device, which is connected on the input side to the fluid supply device, and both Valve devices are connected to a common connection point, which is fluid-conducting connected to the fluid side of the hydraulic accumulator. As a result, it is achieved that fluid is applied to the hydraulic consumer with a presettable biasing pressure. Due to the interconnection of the valve devices and the control valve device according to the invention in a common control circuit, an individual adjustment of the static preload pressure, predetermined by the amount of gas in the hydraulic accumulator, is achieved. The amount of gas and static biasing pressure are selected depending on the function of a hydraulic load connected to the supply line and its suspension. Thus omitted accounts for each function separately ausgestaltaltende suspension systems.

An inventive accumulator system allows the formation of a single, dynamically adjustable suspension system on the tractor of a used for example in agriculture mobile work machine, such as a tractor. At this suspension or relief system to be resilient hydraulic consumers including associated cylinders can be connected via supply lines. In addition to suspension systems on mounted machines and suspension systems on the tractor itself, such as front loader, Heckhubwerk, front lift, Zugmaul and the like, can be realized. Corresponding to the load and the volume to be displaced in the respective suspension system, the gas quantity and the working pressure in the pressure accumulator system according to the invention adapt and are optimized to the specific situation determined by load, cylinder size and desired travel. With a dynamically adjustable suspension by the Inventive accumulator system is usually first approached the position of the working hydraulics and set the suspension in parallel. Then the suspension accumulator is connected to the working hydraulics.

In a preferred embodiment of the accumulator system according to the invention of a hydraulic accumulator is connected with its fluid side as a working memory to the supply line, and the gas side of the main memory is connected via a separating valve to at least one further storage device with a gas supply. To set the amount of gas on the gas side of the hydraulic accumulator, the separating valve is opened as needed and closed again after transfer of a request-specific amount of gas from the other storage device to the gas side of the hydraulic accumulator. It is understood that a gas exchange in the opposite direction, from the gas side of the hydraulic accumulator to the further storage device, can take place.

In a further preferred embodiment of the pressure accumulator system according to the invention, the further storage device is formed from a gas storage, in particular a nitrogen storage, or can be connected from a recharging store via a further valve device to the fluid supply device. Typically, nitrogen is filled in the hydraulic accumulator and accordingly provided as a gas supply. However, it is also conceivable to use any other working gas or gas mixture.

It is also advantageous that a plurality of gas storages can be connected to the gas side of the main memory by means of an associated isolation valve. The setting of the amount of gas and the pressure in the main memory, which represents a main working memory, preferably takes place by means of a lookup table or a comparable database system, which adjusts an associated amount of gas and the pressure depending on the connected cylinder-piston-suspension system and the determined sensor values. When using multiple gas storage, the connection of these is open to the working memory until the required target gas quantity is reached. Then the connection is closed via the isolation valves.

In a further preferred embodiment of the pressure accumulator system according to the invention, the control valve device is connected on the output side to a further user port, and the control valve device is connected on the input side to a tank port with and without interposition of a Tankzuschaltventils. This results in the advantage that an associated working hydraulics can be optimally damped and sprung.

Particularly preferably, a control valve is connected between the fluid supply device and the one valve device for the fluid side of the main memory. Via the control valve, the fluid side of the working memory can be connected to the supply connection or the tank connection as required.

In a preferred embodiment of the invention, the valves for memory adjustment of at least the main memory, such as a valve device and the control valve, combined in a module, the output together with the output on the fluid side of the main memory on the input side of a module block with individual suspension switching valves or another Module block for pressure adjustment using logic valves leads. This results in the advantage of a compact, space-saving construction of the accumulator system and its components. The individual modules and module blocks are advantageously made separately from each other and assembled on a mobile machine to a pressure accumulator system according to the invention.

In a further preferred embodiment of the pressure accumulator system according to the invention, the respective module block interacts with a further third module block, which activates control units of the working machine already existing on the working machine as hydraulic consumers. In this way, a particularly compact, minimal additional design effort required construction of the pressure accumulator system according to the invention is ensured. Particularly preferably, the module blocks are arranged adjacent to each other on the mobile machine.

In a preferred embodiment of the pressure accumulator system according to the invention control in multiple design two or more separately separable and coupled memory hydraulic consumers and feathers this in their movement, the hydraulic consumers are arranged at different positions, for example, on front and rear sides of the machine. This results in the advantage that all resilient and to be damped systems or consumers are supplied by a pressure storage system requirements.

In a further preferred embodiment of the pressure accumulator system according to the invention assume the use of Federungsschaltaltventilen this always in pairs the coupling and suspension of a kind of hydraulic consumer. By the pairs of hydraulic consumers associated suspension switching valves a highly flexible, dynamically adjustable system for suspension and damping of the connected to a mobile machine components and attachments is realized.

• 1 einen Schaltplan für ein erstes Ausführungsbeispiel eines erfindungsgemäßen Druckspeichersystems;
• 2 einen Schaltplan für ein zweites Ausführungsbeispiel des erfindungsgemäßen Druckspeichersystems;
• 3 einen Schaltplan für ein drittes Ausführungsbeispiel des erfindungsgemäßen Druckspeichersystems;
• 4 einen Schaltplan für ein viertes Ausführungsbeispiel des erfindungsgemäßen Druckspeichersystems;
• 5 das Druckspeichersystem aus 4 mit daran auf einer Seite angeschlossenen hydraulischen Verbrauchern als ein fünftes Ausführungsbeispiel;
• 6 einen Schaltplan für ein sechstes Ausführungsbeispiel des erfindungsgemäßen Druckspeichersystems mit zwei Arbeitsspeichern und daran an zwei Seiten angeschlossenen hydraulischen Verbrauchern; und
• 7 einen Schaltplan für ein siebtes Ausführungsbeispiel des erfindungsgemäßen Druckspeichersystems, vergleichbar zu dem in 1 gezeigten ersten Ausführungsbeispiel.

Further advantages and features of the invention will become apparent from the figures and the following description of the drawing. The above-mentioned and the further cited features can be inventively realized individually or in any combination on a pressure accumulator system according to the invention. The features shown in the figures are purely schematic and not to scale. Show it:

• 1 a circuit diagram for a first embodiment of a pressure accumulator system according to the invention;
• 2 a circuit diagram for a second embodiment of the accumulator system according to the invention;
• 3 a circuit diagram for a third embodiment of the pressure accumulator system according to the invention;
• 4 a circuit diagram for a fourth embodiment of the accumulator system according to the invention;
• 5 the accumulator system off 4 with hydraulic consumers connected thereto on one side as a fifth embodiment;
• 6 a circuit diagram for a sixth embodiment of the pressure accumulator system according to the invention with two main memories and connected thereto on two sides hydraulic consumers; and
• 7 a circuit diagram for a seventh embodiment of the pressure accumulator system according to the invention, comparable to that in 1 shown first embodiment.

1 shows a circuit diagram of an accumulator system 10 with a working memory 12 , which is connected to a tank connection T , a fluid supply port P and a utility line A can be connected for a hydraulic consumer. Between the working memory 12 and the tank connection T and the fluid supply port P are a valve device 14 which is switchable between the blocking position shown and an opening position, and a control valve 16 which leads the way to the tank connection T or to the fluid supply port P releases. Between the working memory 12 and the consumer connection A is as a further valve means a suspension switching valve 18 , which is switchable between the blocking position shown and an opening position, arranged. The valve devices 14 and 18 are formed in the illustrated embodiment as electromagnetically controllable 2/2-way switching valves and the control valve 16 is an electromagnetically actuated 3/2-way switching valve. Alternative embodiments of the valve devices 14 . 18 are conceivable.

Between another user connection B and the tank connection T is a tank switch valve 20 , In the illustrated embodiment, an electromagnetically operable 2/2-way switching valve, which is switchable between the blocking position shown and an open position arranged. Next is between the Nutzanschlüssen A . B and the tank connection T and the fluid supply port P a control valve device 22 , In the illustrated embodiment in the form of an electromagnetically controllable 4/3-way proportional directional control valve, arranged between the blocking position shown, the fluid path from the fluid supply port P to the utility connection A and the fluid path from the other user port B to the tank connection T releasing position and one the fluid path from the fluid supply port P to the further user connection B and the fluid path from the utility port A to the tank connection T releasable position is switchable. It is understood that alternative embodiments of the tank switching valve 20 and the control valve device 22 possible are. Thus, instead of the 4/3-way proportional directional control valve, two 3/2-way valves can be used.

The to the tank connection T and to the fluid supply port P leading a fluid line and the utility port A leading further fluid line open at a common connection point 24 from, from a common fluid line to the fluid side 28 of the working memory 12 leads. At the junction 24 and between the suspension switching valve 18 and the utility connection A is in each case as a pressure transducer a measuring device 26a . 26b intended. Another measuring device 26c is at RAM 12 provided in the form of a piston accumulator for monitoring the piston position.

The accumulator system 10 finds application in the present case in the suspension or relief of at least one of the Nutzanschlüsse A . B to be connected cylinder-piston unit as the hydraulic consumer. The design of the reservoir size and the prestressing pressure, determined by the amount of gas to be stored on the gas side 30 of the working memory 12 , depends on the chosen suspension, hard or soft, the load on the cylinder-piston unit as well as its geometry, such as Piston diameter, rod diameter, along with extension and suspension travel.

This in 2 shown second embodiment of the accumulator system 10 is different from the one in 1 shown first embodiment in that additionally a gas storage 34 is provided as a storage, which on the gas side 30 of the working memory 12 connected. To demand gas from the gas supply in the gas storage 34 to the gas side 30 and vice versa is between the memory 12 and the gas storage 34 a separating valve 32 arranged as an electromagnetically operable 2/2-way switching valve, which is switchable between the blocking position shown and an opening position. It is conceivable, the isolation valve 32 during suspension through the accumulator system 10 to hold in the open position, leaving next to the gas side 30 of the working memory 12 also the gas volume in the gas storage 34 is used for suspension or damping with.

As input variables for the electronic control of the amount of gas and the pressure via the regulating device in the working memory 12 serve alongside the values of the measuring equipment 26a to 26c as well as, if appropriate, further travel and pressure sensors, the information of an on-board computer of the associated mobile work machine. The on-board computer typically provides information about the driving speed of the machine coupled to a tractor and, if necessary, geographic position signals (GPS). The information about the coupled machine and the cylinder-piston unit (s) are preferably transmitted by ISOBUS or Ethernet from the coupled machine to the on-board computer and the regulating device. The valve device 14 , the control valve 16 , the suspension switch valve 18 and the control valve device 22 In this respect, form a control loop to the corresponding amount of gas on the gas side 30 of the working memory 12 regulate predetermined bias pressure and the hydraulic consumer via the supply lines A . B to spring to suit, to relieve or to dampen in his movement.

In the in 3 shown third embodiment of the accumulator system 10 are in addition to the gas storage 34 two more gas storage 34a . 34b provided, which via a common fluid line to the gas side 30 of the working memory 12 are connected and each have a separate isolation valve 32a . 32b comparable design as the isolation valve 32 connectable and lockable. It is understood that only one or more than two more gas storage tanks in the accumulator system 10 can be provided. Upon reaching the required for suspension or damping target gas quantity is the gas side connection of the working memory 12 to the gas stores 34 . 34a . 34b by means of isolation valves 32 . 32a . 32b separated. The entire regulation of the amount of gas on the gas side 30 of the working memory 12 is carried out according to requirements before connecting a hydraulic consumer, such as a cylinder-piston unit, to the user connections A . B the accumulator system 10 , during operation with suspension and damping of the hydraulic consumer via the pressure accumulator system 10 , in particular for adapting to changing loads as required, and for short-term separation of the accumulator system 10 from the spring to be damped and hydraulic consumers.

This in 4 shown fourth embodiment is characterized in that instead of separate gas storage a Nachladespeicher 35 is provided, the fluid side 28 ' via another valve device 36 and the control valve 16 to the tank connection T and the fluid supply port P is connectable. The gas side 30 ' of the reload memory 35 is in turn via the isolation valve 32 with the gas side 30 of the working memory 12 connected. The further valve device 36 and the isolation valve 32 are each switchable between the blocking position shown and an opening position. In the further valve device 36 It is an electromagnetically operated 2/2-way switching valve.

The working memory 12 and the reload memory 35 Both hydraulic accumulators in the form of piston accumulators, wherein the respective piston position via measuring devices designed as Wegmesssensoren 26c . 26d is determined. Particularly preferred are the measuring devices 26c . 26d in the respective piston accumulator, main memory 12 or reload memory 35 , integrated. A piston accumulator has the advantage of a high reliable pressure ratio between maximum and minimum pressure. However, it is also conceivable as a working memory 12 and / or as a reload memory 35 to use a bubble or membrane memory, which leads to low energy losses in fast charge and discharge cycles.

5 shows the accumulator system 4 with four arranged thereon hydraulic consumers in the form of hydraulic working cylinders, the first working hydraulics 38 , a second working hydraulics 40 , a third working hydraulics 42 and a fourth working hydraulics 44 for each different attachments to a mobile machine, such as a tractor train. The first working hydraulics 38 is part of a lower link suspension for a handlebar relief and suspension suspension of the mobile work machine, not shown. The second working hydraulics 40 is part of an attachment, such as a drawbar suspension, one Manure spreaders three-point or the like. The third working hydraulics 42 is part of a Zugmaulfederung, with a suspension via coupling gear or rail systems or the like. The fourth working hydraulics 44 is part of a front loader suspension. However, it is also conceivable that working hydraulics 38 to 44 as part of other applications or functions.

Between the accumulator system 10 For individual adjustment and adjustment of the gas quantity and the static preload pressure to the suspension and the working hydraulics to be sprung 38 to 44 are a module block 46 and another module block 48 arranged. In the further module block 48 are a control unit 49 and a valve assembly 50 for controlling the hydraulic consumers including the working hydraulics 38 to 44 summarized. Via connection or coupling units 52a . 52b . 52c and 52d in the form of coupling connections are the Nutzanschlüsse A . B , the tank connection T and one of the Federungsschaltung associated port DSL of the accumulator system 10 with the control unit 49 connected. The utility connection A the respective working hydraulics is guided on the piston side of the respectively associated working cylinder.

In the module block 46 are four suspension switching valves 18a . 18b . 18c and 18d each with an associated measuring device 26 . 26b . 26 ' and 26 " arranged. The first suspension switch valve 18a and the associated measuring device 26 are to the piston side of the first working hydraulics 38 connected, with this fluid line and the valve assembly 50 the further module block 48 connected. Optionally, a tank line, not shown, on the rod side of the first working hydraulics 38 connected. The second suspension switch valve 18b and the associated measuring device 26b are to the piston side of the second working hydraulics 40 connected. Next is a Tankzuschaltventil 20b to the rod side of the second working hydraulics 40 connected. It is understood that piston and rod side can be reversed.

About the connection units 52a to 52d are the suspension switching valves 18a to 18d and the tank switching valves 20b . 20d with the control unit 49 fluid leading connected, which in this respect the function of the control valve device shown in the preceding figures 22 with takes over. The third suspension switch valve 18c and the associated measuring device 26 ' are at the rod side of the third working hydraulics 42 connected. The fourth suspension switch valve 18d and the associated measuring device 26 " are to the piston side of the fourth working hydraulics 44 and the tank switch valve 20d to the rod side of the fourth working hydraulics 44 connected. Depending on which working hydraulics 48 to 44 is used, the biasing pressure in the accumulator system 10 automatically adjusted and the appropriate suspension switch valve 18a to 18d connected.

6 shows a sixth embodiment, an extension of the in 5 shown pressure accumulator system 10 , wherein instead of the Nachladespeichers another memory 54 is provided, which via another connection point 56 a module block 46 ' supplied as well as with another module block 48 ' interacts. The additional module blocks 46 ' . 48 ' have the same structure as the module blocks 46 . 48 and are opposite this on the other side of the accumulator system 10 and thus arranged on the other side of the mobile work machine, so that additional implements are provided for both axes of the machine. About the one module block shown in the figure on the right 46 are three working hydraulics, the first working hydraulics 48 , the second working hydraulics 40 and the third working hydraulics 42 , connected and spring-damped as needed. The other, shown in the figure on the left module block 46 ' serves to connect in turn three working hydraulics, the fourth working hydraulics 44 , a fifth working hydraulics 58 and a sixth working hydraulics 60 , From 5 known working hydraulics 38 to 44 are designed in the same way. The fifth working hydraulics 58 is part of an attachment, comparable to the second working hydraulics 40 , The sixth working hydraulics 60 is part of a Unterlenkerfederung to relieve on a front handlebar part of the mobile machine.

7 shows an accumulator system 10 comparable to the structure of in 1 shown in the first embodiment, wherein in the in 7 shown seventh embodiment, the pressure adjustment of the working memory 12 by means of hydraulic logic valves. In the from the fluid side of the main memory 12 to the fluid supply port P leading fluid line is constructed of two units valve device 14 . 14 ' arranged. Between the common connection point 24 and the utility connection A as well as the further user connection B are a first logic valve 64 , a second logic valve 66 and the further valve means constructed from a third logic valve 18 as well as another control valve 70 and the control valve device 22 arranged. The two valve units 14 . 14 ' In this case, the function of the first valve device is demanding and with LE_AS designated third logic valve forms the further valve device 18 out to the utility A connected to the hydraulic consumer.

The peculiarity of in 7 shown circuit is the hydraulically controlled adjustment memory pressure in memory 12 to the piston-side or rod-side pressure in the cylinder-piston unit to be resilient. In this way, an undesirable, sudden extension and retraction of the cylinder is effectively prevented by pressure differences in coupling the components. The extension and retraction of the connected piston-cylinder unit via an associated control unit, such as a tractor control unit. If no attachment is connected or a suspension is not desired, this is another control valve 70 not switched and the memory 12 gets on through the first valve unit 14 charged maximum pressure.

By the piston-side pressure in the cylinder-piston unit, the second valve unit 14 ' kept open and consequently the two with LE_TS and LE_AS designated logic valves 18 . 66 kept closed. Due to the balance of forces, they are in the opening direction of the two logic valves 18 . 66 acting pressures too low. Once the memory pressure in memory 12 the pressure on the piston side in the cylinder-piston unit exceeds that opens with LE_DA designated logic valve 64 , Once the system is activated and the other control valve 70 is switched, is the signal line to the tank T relieved and the second valve unit 14 ' closes due to tank pressure relief. In the subsequent suspension operations is thus no further reloading of the fluid supply port P possible.

The accumulator pressure is via the connection point 24 and the first logic valve 64 , the aperture and the other control valve 70 drained to tank T. Through the aperture a back pressure is generated, which is the other logic valve 66 and the further valve device 18 closed. Once the piston-side pressure is approximately equal to the pressure in the main memory 12 corresponds, closes the first logic valve 64 , causing the pressure in front of the panel to collapse. Due to the changing forces open the second logic valve 66 at low tank pressure and further the further valve device 18 , The balance of forces at the second logic valve 66 can by an opening in the direction of supporting spring (in 7 not designated). The cylinder-piston unit is on the piston side with the main memory 12 and on the ring side with the tank connection T via the logic valves 18 . 64 and 66 connected.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102012017003 A1 [0002]
• DE 102014000696 A1 [0003]

Claims (10)

Pressure accumulator system, in particular for adjusting the gas quantity and the static preload pressure in a variable suspension system of a working hydraulics (38, 40, 42, 44, 58, 60) of a mobile machine, with at least one hydraulic accumulator (12, 54), the fluid side (28) a fluid supply device (P) can be connected by means of at least one valve device (14), characterized in that the fluid side (28) of the hydraulic accumulator (12, 54) to a supply line (A) for a hydraulic consumer (38 - 44, 58, 60) by means of a further valve device (18, 18a - 18d) can be connected, that the supply line (A) is connected on the output side to a control valve device (22), which is connected on the input side to the fluid supply device (P), and that both valve devices ( 14, 18, 18a - 18d) are connected to a common connection point (24, 56), the fluid leading to the fluid side (28) of the hydraulic accumulator (12, 54) v is linked. Pressure accumulator system after Claim 1 , characterized in that the one hydraulic accumulator (12, 54) with its fluid side (28) as a main memory to the supply line (A) can be connected, and that the gas side (30) of the working memory (12, 54) via a separating valve (32, 32a, 32b) can be connected to at least one further storage device (34, 34a, 34b, 35) with a gas supply. Pressure accumulator system after Claim 1 or 2 , characterized in that the further storage device from a gas reservoir (34, 34a, 34b), in particular a nitrogen storage, is formed or from a Nachladespeicher (35) via a further valve means (36) to the fluid supply device (P) can be connected. Pressure accumulator system according to one of the preceding claims, characterized in that a plurality of gas reservoirs (34, 34a, 34b) by means of an associated isolation valve (32, 32a, 32b) to the gas side (30) of the working memory (12) can be connected. Pressure accumulator system according to one of the preceding claims, characterized in that the control valve device (22) is connected on the output side to a further useful connection (B), and in that the control valve device (22) on the input side to a tank connection (T) with and without interposition of a Tankzuschaltventiles (20, 20b, 20d) is connected. Accumulator system according to one of the preceding claims, characterized in that between the fluid pressure supply means (P) and the one valve means (14, 36) for the fluid side (28) of the working memory (12, 54), a control valve (16) is connected. Accumulator system according to one of the preceding claims, characterized in that the valves for memory adjustment of at least the main memory (12, 54), such as a valve device (14, 36) and the control valve (16), are combined in a module, the output along with the output on the fluid side (28) of the main memory (12, 54) to the input side (DSL) of a module block (46, 46 ') with individual suspension switching valves (18a-18d) or another module block for pressure adjustment using logic valves (64, 66). Pressure accumulator system according to one of the preceding claims, characterized in that the respective module block (46, 46 ') cooperates with a further third module block (48), the control units (49) of the working machine already present on the working machine as hydraulic consumers (38 - 44, 58, 60). Pressure accumulator system according to one of the preceding claims, characterized in that in multiple design two or more mutually separable and coupled memory (12, 54) hydraulic consumers (38 - 44, 58, 60) control and feathers in their movement, at different positions of the machine are arranged. Accumulator system according to one of the preceding claims, characterized in that when using Federungsschaltaltilen (18, 18a - 18d) these always in pairs take over the coupling and suspension of a kind of hydraulic consumer (38 - 44, 58, 60).

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