Material-receiving device for a suction excavator, and suction excavator having said material-receiving device

Abstract

The present invention relates to a material-receiving device for a suction excavator (02), the material-receiving device having an articulated tube support (01) and a suction tube. A first, proximal end of the articulated tube support (01) can be attached to the suction excavator by means of a rotationally movable fastening mount (03). At a second, distal end, the articulated tube support (01) comprises a suction connecting piece (04) connected to the suction tube. The articulated tube support (01) comprises at least n≥3 links (05), between each of which a hinge joint (06) with an associated drive (07) is formed. All the hinge joints (06) have the same degree of freedom, so that the links (05) are pivotable in a common plane (16). According to the invention, the material-receiving device also has a rotary joint (08), which is located between the last, distal hinge joint (09), on which the suction connecting piece is located, and the first hinge joint. The rotary joint (08) has a different degree of freedom than the hinge joints (06), so that the link (05) disposed subsequently to the rotary joint (08) can be moved out of the plane. The invention also relates to a suction excavator (02) having the material-receiving device.

Description

[0001] Material pickup device for a suction excavator and suction excavator with this material pickup device

[0002] The present invention relates to a material collection device with an articulated hose carrier and a suction hose for attachment to a suction excavator. The invention also relates to a suction excavator with the material collection device with articulated hose carrier and suction hose.

[0003] A suction excavator is a vehicle with a vehicle frame which carries a material collection container, which can preferably be tipped out. In practical designs, such a suction excavator has a telescopic device which has two telescopic arms, the container-side end of which is each arranged on a tilting axis about which the material collection container can be rotated, with the frame-side end of each telescopic arm being arranged on the vehicle frame. The suction hose is usually arranged at one end on the suction excavator and has a suction nozzle at its other end, by means of which material can be sucked in. The sucked-in material is transported through the suction hose and introduced into the material collection container. A suction hose is known to have a larger diameter than standard hoses, such as those used for pumping out water or supplying liquid concrete.Known articulated hose carriers for suction excavators have angle-adjustable joints between individual links, so that the links can be moved or rotated in a single plane. Furthermore, rotation of the articulated hose carrier around a pivot point is possible via a rotary drive, with this rotary drive forming the connection between the articulated hose carrier and the vehicle. The plane in which the articulated hose carrier extends can therefore be described by the axis of rotation of the rotary drive and the pivoting direction of the first link, which is attached to the rotary drive; it is usually perpendicular to the vehicle floor or vehicle frame. The connection is therefore a rotatable fastening bracket. This known arrangement results in a working area that can be described by a cylindrical coordinate system.A typical articulated hose carrier for suction dredgers has n of links, preferably n>4, with joints between them, whereby an angle change can be effected between each of the links using an associated drive. However, simple articulated hose carriers with fewer than four links are also possible.

[0004] The movement of one joint of the articulated hose support affects the position of the other upstream joints and the suction hose. Since the joints only allow movement in a single, common plane, collisions between the individual links can occur. This can be avoided by modern controls that limit the range of motion of individual joints if necessary.

[0005] The previously known arrangements or material pickup devices on suction excavators have a limited working surface or a limited working range because their limbs can only move in one plane. However, a broad range of applications is generally preferred for suction excavators because a wide variety of locations need to be worked on or material needs to be vacuumed out. For example, crossing pipes in the ground need to be vacuumed clear on all sides or construction rubble needs to be vacuumed out of a building. In order to cover the required working space, it is sometimes necessary to change the position of the vehicle, whereby the maneuvering space on construction sites is usually tight, or manual assistance by a person using a shovel or similar is required. Therefore, for certain applications, a more flexible material pickup device, particularly one with a greater degree of freedom for the articulated hose carrier, is desirable.

[0006] EP 2 149 434 B1 describes a rotary joint and a rotary joint connection for an industrial robot. The rotary joint connection is arranged between a working device and a joint section and comprises a rotatable shaft section with a fluid transport path. The fluid transport path is formed by a hose path consisting of two hoses wound loosely in a spiral shape at a distance around a rotating section. However, such supply hoses are not suitable for vacuuming coarse material due to their type and size.

[0007] DE 10 2007 063 408 A1 discloses a swivel joint for hose and / or pipe connections, which is used particularly in the pharmaceutical industry and through which a fluid is conveyed. However, this swivel joint cannot be used to transport coarse material because its rigid construction makes it prone to clogging and excessive wear. The hose length required for suction dredgers cannot be achieved, and the movement of the guided hose is severely restricted.

[0008] EP 3 705 662 A1 describes an articulated arm control system for a concrete pump. The articulated arm consists of a rotary block and four segments, the rotary block having a rotary joint that can be controlled by a hydraulic motor. EP 0 166 800 A1 shows a head piece for a mobile or stationary refueling system, comprising a refueling coupling and a pipeline. The pipeline consists of five pipe sections, each connected by a rotary joint with a single degree of freedom. Three of the five rotary joints have parallel axes of rotation. The other two rotary joints have axes of rotation that are arranged perpendicular to the aforementioned axes of rotation of the three rotary joints. Furthermore, the head piece has a further rotary joint at one end, which serves as a connection to the refueling system. Due to the use of pipe sections that are not flexible, the refueling range is limited.

[0009] DE 10 2016 106 427 B3 describes a method for controlling the movement of an articulated hose carrier. The articulated hose carrier has at least three links, whereby an angle change can be effected between adjacent links using an associated drive.

[0010] US 3,495,878 A describes a pipe device for the pneumatic transport of bulk material. The device comprises a stationary pipe, a rotatable pipe which is rotatably connected at one end to the end of the stationary pipe, and a flexibly bendable pipe unit which is connected at its end to the other end of the rotatable pipe. A first drive device causes a rotary movement of the rotatable pipe and the flexible pipe unit. A second drive device is provided for bending the flexible pipe unit, thereby causing a lifting movement.

[0011] DE 10 2018 004 334 A1 describes a suction excavator with a chassis and a superstructure arranged on the chassis. The superstructure comprises a suction nozzle for picking up suction material and a suction nozzle arm with at least one arm link for supporting the suction nozzle. The suction nozzle arm can be pivoted about a first pivot axis running parallel to a vertical axis of the suction excavator. The suction nozzle arm is mounted on a support element with an end facing the superstructure. The support element can be pivoted together with the suction nozzle arm relative to the superstructure about a second pivot axis running parallel to a longitudinal axis of the suction excavator and can also be fixed together with the suction nozzle arm in various pivot positions relative to the superstructure.

[0012] EP 3 399 108 B1 shows an articulated suction arm of a suction excavator. The suction arm comprises at least two parts which are defined in the same plane and are pivotally connected to one another along a first axis perpendicular to the plane. The two parts define a rear end and a front end. A base piece is pivotally connected to the rear end along a second axis perpendicular to the plane. Pivoting connection means are arranged on the base piece in order to pivot the at least two parts along a third axis which is defined in the plane. A nozzle which is arranged in the region of the front end is configured to be connected to a front end of a suction line. The nozzle defines a fourth axis which is defined in the plane corresponding to an initial position.The suction arm includes a tilting device configured to change the orientation of the nozzle so that the fourth axis can be tilted to one side or the other of the plane. Eccentrically arranged hydraulic cylinders are used as the tilting device, which can tilt the fourth axis or the corresponding section of the suction arm by approximately 10°. Larger inclinations, for example of approximately 90°, are not possible due to the selected design. Therefore, certain areas in the subsurface cannot be reached by the nozzle.

[0013] An object of the present invention is to provide a material handling device for suction excavators with a larger or more easily accessible working area, without the risk of the suction hose being damaged or its diameter being reduced during movement of the articulated hose carrier, so that a continuous material flow is maintained in any working position. In particular, in order to expand the range of application of the suction excavator, a working position of the suction nozzle should be accessible from various directions without the suction excavator having to change its position.

[0014] According to the invention, the object is achieved by a material pickup device with an articulated hose carrier and a suction hose according to the appended claim 1 and by a suction excavator with the material pickup device with articulated hose carrier and suction hose according to the independent claim 10.

[0015] The material pickup device according to the invention comprises an articulated hose carrier and a suction hose, the articulated hose carrier carrying and guiding the suction hose. During operation, the material pickup device is attached to a suction excavator so that material can be conveyed into a container of the suction excavator via the suction hose. The negative pressure and suction air flow required for this is generated by a fan unit of the suction excavator. The articulated hose carrier has a rotatable fastening bracket at a first end, by means of which the articulated hose carrier can be attached to the suction excavator. The fastening bracket can be a pivot joint or a rotary joint with a rotation axis. The rotation axis of the fastening bracket is usually perpendicular to a vehicle floor, the fastening bracket usually being attached to the rear of the suction excavator in the direction of travel.The fastening bracket can be used to move the articulated hose carrier with the suction hose. At its other end, the material pickup device has a suction nozzle attached to the distal end of the suction hose. The articulated hose carrier consists of a number n of links, where n>3, particularly preferably n>4, between which a hinge joint (hereinafter also referred to as a joint for simplicity) is formed. A drive is assigned to each hinge joint, with the drives preferably being operated hydraulically. Alternatively, electric or pneumatic drives can be used. All joints have the same degree of freedom, i.e. all links of the articulated hose carrier can be moved or pivoted in a single common plane by the joints and their drives.

[0016] According to the invention, the material intake device further comprises at least one swivel joint, which is arranged between the last (most distal) hinge joint, which is located on the member on which the suction nozzle is located, and the first hinge joint, which is closest to the rotatable fastening bracket. In a preferred embodiment, the swivel joint is located between the last and the penultimate hinge joint, i.e., between the two hinge joints furthest from the proximal end of the articulated hose carrier.

[0017] In modified versions, the swivel joint is mounted one or two links further toward the proximal end of the articulated hose support. This increases the range of motion of the suction nozzle, as several links can be moved out of the plane defined by the rotation axis of the mounting bracket and the position of the second link.

[0018] In a further modified version, two swivel joints can also be arranged on the articulated hose carrier. This allows the articulated hose carrier to be guided around a house corner or a similar obstacle, for example.

[0019] The swivel joint has an axis of rotation, whereby the swivel joint has a different degree of freedom than the hinge joints, so that a movement of the link arranged downstream of the swivel joint out of the plane of the other joints is possible. Furthermore, the swivel joint has a continuous receiving opening along its axis, with a cross-section larger than the cross-section of the suction hose. The suction hose is led through the receiving opening. The swivel joint is therefore mounted coaxially and concentrically to the suction hose, i.e. the axis of rotation of the swivel joint runs in the receiving opening coincident with the longitudinal axis of the suction hose. The rotation in the swivel joint therefore takes place around the longitudinal axis of the suction hose. In order to be able to carry out such a rotation unhindered, the swivel joint must also be a load-bearing component of the articulated hose support (overall supporting structure).Additional (non-rotating) supporting elements cannot be guided over the swivel joint because they would hinder the rotation.

[0020] Due to the previously described design of the material pick-up device, the suction hose can be moved with the articulated hose carrier and its hinge joints and the swivel joint. With the material pick-up device according to the invention, at least one further degree of freedom is thus realized, so that the

[0021] Suctioning of material by a suction excavator is also possible outside the plane defined by the joints of conventional suction excavators, e.g. parallel to the direction of travel of the suction excavator.

[0022] A further advantage of the material pick-up device according to the invention is that, due to the at least one rotary joint and its additional degree of freedom, a larger working range of the material pick-up device with the articulated hose carrier and the suction hose is possible in comparison to the other joints.

[0023] The material pickup device according to the invention advantageously makes it possible to work in larger work spaces without having to move the suction excavator to which the material pickup device is attached. The swivel joint makes it possible for the first time to move entire sections of the articulated hose carrier out of the usual work plane. The range of movement of the articulated hose carrier is thus qualitatively increased so that it can only be fully described using a cylindrical coordinate system, whereas conventional hose carriers can only be moved in a work space that is mapped out in a Cartesian coordinate system. This makes it possible to use it on cramped construction sites or similar, and the suction excavator does not have to be parked as precisely in the work area because the work area is made more flexible and spacious thanks to the material pickup device according to the invention. Likewise, no manual assistance with shovels or the like is necessary.Exposed pipes, ducts, rails, etc. can be conveniently exposed from the sides and underneath using the material pickup device. This also allows material such as soil or gravel to be easily removed from intersecting pipes, etc.

[0024] For the best effect and a large range of motion, the swivel joint should preferably be located in the kinematic chain formed by the articulated hose carrier and not at the suction end of the kinematic chain (suction nozzle).

[0025] The swivel joint of the material pick-up device is preferably rotatable by 90° to 190° in both the negative and positive directions, starting from a center position. Preferably, the swivel joint is rotatable by at least 170° to 190° in both the negative and positive directions. Particularly preferably, the swivel joint is rotatable by 190° in both the negative and positive directions, so that a total rotation range of slightly more than 360° can be achieved.

[0026] The middle position is usually in the common plane of the hinge joints.

[0027] An electric drive can be provided on the swivel joint. A hydraulic drive is particularly preferably arranged on the swivel joint. Other fluid power drives, such as a pneumatic drive, are also conceivable. The hydraulic drive of the swivel joint preferably has a brake. The brake is normally closed, in particular also in the event of a power failure or during transport.

[0028] For the supply lines of the hydraulic drive, including the downstream joints and their hydraulic drives, the swivel joint is designed in such a way that the supply lines cannot become tangled up or damaged. It must also be taken into account that the swivel joint itself is a supporting component of the articulated hose carrier. For this purpose, the swivel joint comprises at least two, preferably four hoses and a deflection pulley for each hose. The hoses are coupled to the upstream and downstream hydraulic supply lines by means of connectors. The hoses are preferably arranged together on one side surface of the swivel joint. For example, a hose is connected to a first connector on the swivel joint and runs from there to the deflection pulley located at a distance and around this back to a second connector. The first connector is firmly connected to the swivel joint and rotates with it.The second connector is located on a rotationally fixed component which is arranged indirectly on the swivel joint. The second connector therefore forms a rotationally fixed point. The second hose is arranged in the same way as the first hose, mirrored. The deflection rollers run in opposite directions and are connected to one another in a 1:2 ratio. The at least two deflection rollers interact and are preferably connected to one another by an element, in particular a spring. The spring serves to compensate for any length errors which may arise during installation.

[0029] In an advantageous embodiment, a rotatable hose coupling is formed on the swivel joint, which can also be referred to as a rotary flange or rotary flange pipe. With a rotatable hose coupling on the swivel joint, the suction hose is preferably formed in two parts. The first part of the suction hose is bendable. The second part of the suction hose is bendable and twistable. This means that the suction hose can move with the articulated hose carrier without kinking or twisting too much, so that the inner cross section of the suction hose is not reduced or is only reduced slightly in order not to impede the material flow. The clear cylinder cross section within the swivel joint can preferably have a diameter of approximately 500 mm in order to pass through a typical suction hose.

[0030] In a preferred embodiment, the suction hose can be rotatably attached to the suction excavator, in particular to a cover of a material collection container of the suction excavator. Particularly preferably, the suction hose is attached to the material collection container by means of a rotating flange.

[0031] A suction excavator according to the invention comprises the previously described material collection device with articulated hose carrier and suction hose. The suction excavator as a vehicle further comprises a vehicle frame, a suction fan (fan unit), and a material collection container in which the sucked-up material can be collected and transported. The material is removed by means of the suction nozzle located on the suction hose and transported via the suction hose into the material collection container. The suction excavator also comprises a control unit.

[0032] Further details, advantages, and developments of the invention will become apparent from the following description of preferred embodiments, with reference to the drawings. They show:

[0033] Fig. 1 is a perspective view of a material receiving device according to the invention in the swung-out working position, which is attached to a suction excavator;

[0034] Fig. 2 is a plan view of the material receiving device according to Fig. 1;

[0035] Fig. 3 shows a cross-section of a swivel joint of the material pickup device; and Fig. 4 shows a perspective view of the material pickup device according to Fig. 1 in the pivoted transport position on the suction excavator.

[0036] Fig. 1 shows a perspective view of a material pickup device according to the invention in the working position with an articulated hose carrier 01 and a suction hose 10 (for the sake of simplicity only shown in Fig. 3), the material pickup device being attached to a suction excavator 02. The material pickup device is shown extended in an operational state (working position). The articulated hose carrier 01 is attached at a first, proximal end to the suction excavator 02 in a rotatable manner by means of a rotatable fastening bracket 03. By means of the fastening bracket 03, which has an axis of rotation, the articulated hose carrier 01 can be rotated about the axis of rotation, so that the articulated hose carrier 01 and a suction hose arranged thereon can be rotated from a rest position or transport position on the suction excavator 02 into a working position.At its second, distal end, the articulated hose carrier 01 has a suction nozzle 04 to which the suction hose can be attached and which serves to remove and collect material.

[0037] In the example shown, the articulated hose carrier 01 consists of five links 05, between each of which a mechanical hinge joint 06 with a respective hydraulic drive 07 is arranged. The hinge joints 06 can be moved like a hinge. All hinge joints 06 have the same degree of freedom, so that the links 05 can initially pivot in a common plane.

[0038] According to the invention, the material pickup device further comprises a swivel joint 08 integrated in the articulated hose carrier 01. In the illustrated embodiment, the swivel joint 08 is arranged between the last, distal hinge joint 09, which is furthest away from the rotatable fastening bracket (03) of the suction excavator and on which the suction nozzle 04 is located, and the second-to-last hinge joint 11. Preferably, the swivel joint 08 is arranged directly on the second-to-last joint 11 and can also form a structural unit with it. The swivel joint 08 is rotatable about an axis of rotation and thus has a different degree of freedom than the other joints 06, 09, 11. The rotation of the rotary joint 08 about the axis of rotation with a different degree of freedom than the remaining hinge joints 06, 09, 11 enables a movement of the member 05 arranged downstream of the rotary joint 08 out of the plane of the other joints.This expands the range of motion of the articulated hose carrier 01 and thus the working range of the suction excavator 02 by one degree of freedom, enabling the removal of material from the side and below an obstacle, such as intersecting pipes. The material pickup device therefore also enables suction excavation parallel to the direction of travel of the suction excavator 02.

[0039] The swivel joint 08 has a continuous receiving opening 12 with a cross section larger than the cross section of the suction hose, so that the suction hose runs through the swivel joint 08. The suction hose can be attached to a material collecting container 14 of the suction excavator 02 by means of a flange 13, so that removed material can be conveyed via the suction hose into the material collecting container 14. The swivel joint 08 preferably has a hydraulic drive 20, but can also be operated with an electric drive, for example. To supply the drives, the material pickup device includes supply lines 15 which are guided along the articulated hose carrier 01. The structure of the swivel joint 08 is explained in more detail in Fig. 3.

[0040] Fig. 2 shows a plan view of the material pickup device according to Fig. 1. In Fig. 2 it can be seen that by means of the swivel joint 08 the suction nozzle 04 can be pivoted from a first plane 16, in which the joints and links of the articulated hose carrier located between the swivel joint and the suction excavator are movable, into a second plane 17. In Fig. 2 the suction nozzle 04 with the last, distal joint 09 and the link 05 located between them is pivoted by approximately 60°, so that the suction nozzle 04 lies parallel to the direction of travel of the suction excavator 02 and can be moved, for example, in a trench A to pick up material.

[0041] Fig. 3 shows a cross-sectional view of the swivel joint 08 of the material pickup device. The swivel joint 08, as a component of the articulated hose carrier 01, is designed such that when the swivel joint 08 rotates, the supply lines 15 and in particular hydraulic hoses 18 which connect the supply lines 15 via the swivel joint 08 are not kinked and do not become tangled with one another. The supply lines 15 run from the suction excavator 02 via the links 05 to the last, distal joint 09 which is positioned furthest away from the suction excavator. The swivel joint 08 comprises two hydraulic hoses 18, each of which is connected at one end to a first connector 19 in a rotationally fixed manner. The first connector 19 is arranged on an outer ring 21 on the outer circumference of the swivel joint 08, wherein the outer ring 21 of the swivel joint 08 is not rotatable. The second end of the two hydraulic hoses 18 is each connected to a second connector

[0042] 22 . The second connector 22 is connected to an inner ring

[0043] 23 of the rotary joint 01, which is rotatable. The rotating inner ring 23 rotates when the rotary joint 01 rotates, the inner ring 23 rotating relative to the outer ring 21. To prevent the hoses from becoming tangled up, they are each laid around a deflection roller 24. The two deflection rollers 24 are arranged on the inner ring 23 so that they can move in opposite directions and are connected by means of a spring 25 so that any length errors that may occur during installation are compensated for. Accordingly, the rotary joint 08 according to Fig. 3 comprises two hydraulic hoses 18, two first connectors 19, two second connectors 22 and two deflection rollers 24, these components being arranged in a mirror image in one plane. Due to the counter-rotation, the deflection roller 24 of the first hose 18 moves the same distance in the same direction as the counter-rotating second deflection roller 24 with the second hose 18.In modified embodiments, several counter-rotating systems can be arranged one behind the other; in our case, for example, there are four hoses in two systems. The inner radius of the swivel joint 08 forms the continuous receiving opening 12 for the suction hose 10. The suction hose 10 is twisted by means of the swivel joint 08, whereby excessive twisting of the suction hose can be avoided, for example, by restricting the rotation of the swivel joint 08 or by a two-part design with a rotary coupling of the suction hose. In Fig. 3 it is also clearly visible that the axis of rotation of the swivel joint runs in the longitudinal axis of the suction hose 10. The swivel joint 08 is thus arranged coaxially and concentrically to the suction hose in the area of ​​the receiving opening 12.

[0044] Fig. 4 shows a perspective view of the material pickup device according to Fig. 1 in the transport position on the suction excavator 02. In the transport position, the material pickup device is arranged on the rear of the suction excavator 02. In this position, the material pickup device with the articulated hose carrier 01 is pivoted approximately at a right angle in the joints and thus "wound up in a spiral shape" and the swivel joint 08 is rotated so far that a collision of elements of the material pickup device, in particular the suction nozzle 04, with other components is avoided.

[0045] List of reference symbols

[0046] 01 Articulated hose carrier

[0047] 02 Suction dredger

[0048] 03 Rotatable mounting bracket

[0049] 04 Suction nozzle

[0050] 05 member

[0051] 06 Hinge joint

[0052] 07 hydraulic drive

[0053] 08 Swivel joint

[0054] 09 last, distal hinge joint

[0055] 10 suction hose

[0056] 11 penultimate hinge joint

[0057] 12 continuous receiving opening

[0058] 13 Flange

[0059] 14 material collection containers

[0060] 15 Supply line

[0061] 16 first level

[0062] 17 second level

[0063] 18 Hydraulic hose

[0064] 19 first connector

[0065] 20 Drive of the swivel joint 08

[0066] 21 Outer ring of the swivel joint 08

[0067] 22 second connector

[0068] 23 Inner ring of the swivel joint 08

[0069] 24 pulley

[0070] 25 spring

[0071] A ditch parallel to the direction of travel

Claims

Patent claims 1. Material pickup device with an articulated hose carrier (01) and a suction hose for a suction excavator (02), wherein the articulated hose carrier (01) has a rotatable fastening bracket (03) at a first, proximal end and a suction nozzle (04) connected to the suction hose at a second, distal end, and wherein the articulated hose carrier (01) has a number n>3 members (05), between each of which a hinge joint (06) with a respective associated drive (07) is formed, wherein all hinge joints (06) have the same degree of freedom, so that the members (05) can be pivoted in a common plane (16), characterized in that the material pickup device further comprises a rotary joint (08) which has a continuous receiving opening (12) along its axis of rotation with a cross section greater than the cross section of the suction hose, wherein the rotary joint (08) is arranged at a position between the last, distal,from the fastening bracket (03) furthest hinge joint (09) and the first hinge joint closest to the rotatable fastening bracket, wherein the rotary joint (08) has a different degree of freedom than the hinge joints (06), so that a movement of the member (05) arranged distally following the rotary joint (08) out of the plane is possible, wherein the suction hose is guided through the receiving opening (12) of the rotary joint, so that the rotary joint (08) is arranged coaxially to the suction hose.

2. Material receiving device according to claim 1, characterized in that the number of links (05) is n>4. Material pick-up device according to claim 1 or 2, characterized in that the rotary joint (08) is arranged between the two hinge joints furthest from the proximal end of the articulated hose carrier. Material pick-up device according to one of claims 1 to 3, characterized in that the rotary joint (08) has a fluidic or electric drive (20). Material pick-up device according to one of claims 1 to 4, characterized in that the rotatable fastening bracket (03) is a further rotary joint or a pivot joint, wherein the fastening bracket (03) is attachable to the suction excavator (02). Material pick-up device according to one of claims 1 to 5, characterized in that a rotatable hose coupling is installed in the rotary joint (08).Material pickup device according to claim 6, characterized in that the suction hose with a rotatable hose coupling consists of two parts, the first part of the suction hose being bendable and the second part of the suction hose being bendable and twistable. Material pickup device according to one of claims 1 to 7, characterized in that the swivel joint (08) comprises at least two hoses (18) and a deflection roller (24) for each hose (18).

9. Material receiving device according to claim 8, characterized in that the deflection rollers (24), which interact in opposite directions, are coupled to one another via a spring element.

10. Suction dredger (02) with a material receiving device with Articulated hose carrier (01) and suction hose according to one of claims 1 to 9, further comprising a material collecting container (14).

11. Suction dredger (02) according to claim 10, characterized in that the suction hose is rotatably arranged on the material collecting container (14) of the suction dredger (02).

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