Suction dredger

Abstract

The invention relates to a suction dredger (1) comprising a chassis (2) with a suction blower (3) mounted thereon, a suction nozzle (4) and a container (5) which is arranged in the direction of flow between the suction nozzle (4) and suction blower (3), is tiltable about a tilting axis (11) and has a container floor (6), two side walls parallel to the direction of travel, a front wall and a rear wall for depositing and collecting sucked-up material, and with a telescopic device (10) for shifting the tilting axis (11) of the container (5).

Description

[0001] The invention relates to a suction dredger comprising a chassis with a driveable suction blower mounted thereon, a suction nozzle and a container arranged between the suction nozzle and the suction blower in the direction of flow, which can be tilted about a tilting axis for separating and collecting suctioned material and with a telescopic device for relocating the tilting axis of the container.

[0002] Utility model DE 20 2005 006 671 discloses a similar type of suction dredger with a suction blower and a tilting container. Utility model JP 58222231 discloses a suction dredger in which the container is emptied by means of a discharge flap located in the bottom of the container, near the rear end. Furthermore, DE 0 613 983 also describes a suction dredger in which a conveying device for transporting the collected material is provided in the bottom of the container.

[0003] From DE 20 2010 007 463 U1, a suction dredger for collecting material is also known, which has a pneumatic suction turbine for generating a suction airflow, connected to a collection container. Above the collection container is a guide chamber for the suction air and material, into which an outwardly projecting pipe opens for connecting a suction hose with a suction head for collecting the material, which is then separated in the collection container. A separation joint is arranged between the guide chamber and the collection containers, with at least one sieve in the suction airflow provided in the guide chamber for classifying the material. In the suction dredger, the guide chamber is preferably hinged about a laterally arranged axis.

[0004] DE 90 16 448 U1 describes a mobile suction excavator with a chassis on which a vacuum generator with drive unit, a swiveling container for receiving the suction material and a filter device for cleaning the airflow are arranged, wherein the receiving container has connections for at least one suction nozzle ending in a suction head and for the vacuum generator.

[0005] Furthermore, DE 299 12 070 discloses a suction dredger in which the container, which can be tipped for emptying, can be tipped laterally about a tipping axis running parallel to the longitudinal axis of the chassis.

[0006] From EP 1 364 570 A1, a tipping container is known which is particularly suitable for mounting on a special multi-purpose vehicle or the like. This tipping container has a support structure with a base frame from which two posts rise vertically on opposite sides, the ends of pairs of linkages being arranged on the posts, the opposite ends of the linkages being arranged on corresponding arms to form respective articulated quadrilaterals that extend upwards and are arranged on the sides of the container, to which the container is rotatably connected. A hydraulic actuator is provided for each of the arms. One end of the actuator is rotatably connected to the base and the opposite end is rotatably connected to the container. Furthermore, means are provided for locking the movement of the linkages at a preset degree of rotation.

[0007] Finally, US 6 371 565 B1 describes a side-mounted high-lift tipping system for sidewalk / street sweepers, comprising a dirt container positioned between laterally adjacent lifting assemblies, each lifting assembly comprising a vertically extending stand, a lifting arm hinged at one end to the top of the stand, and a single-sided double-acting hydraulic lifting cylinder for raising and lowering the lifting arm.

[0008] A torque control mechanism minimizes misalignment between the lifting cylinders of each lifting arrangement, and a manual safety stop mechanism allows an operator to selectively lock the waste container and associated structural components in the raised position. A position control system uses hydraulic fluid from the rod end of the lifting cylinder to maintain the waste container in a horizontal or near-horizontal position during the lifting cycle.

[0009] The known suction dredgers have the disadvantage that the containers into which the dredger empties the material further restrict the already limited working space on construction sites. Once the container is full, a truck arrives at the construction site to exchange it for an empty one. Furthermore, the described suction dredgers are not secured against tipping over completely when the dredger's container is tilted. The object of the invention is therefore to facilitate the removal of collected material, to reduce the space required for this, at least temporarily, and to prevent the suction dredger from tipping over completely.

[0010] This task is solved in suction dredgers, comprising a chassis with a mounted, driveable suction blower, a suction nozzle and a container arranged between the suction nozzle and the suction blower in the direction of flow, which can be tilted about a tilting axis for separating and collecting suctioned material, by the fact that the tilting axis is arranged above a container bottom in the upper half of the container.

[0011] Raising the tipping axis also keeps the upper edge of the container, over which the collected material is tipped, at a higher level. This level is chosen to exceed the platform height of a truck. This allows the suction excavator to empty the container directly onto the truck without requiring additional containers. This saves space on the construction site and reduces the number of trips required. Because the tipping axis is located above the container base, in the upper half of the container, the bottom of the container pivots towards the center of the vehicle during tipping.

[0012] Since the axis of rotation is located in the upper part of the container, it lies above the top edge of the loading platform of a transport vehicle, so that it can be emptied directly onto the loading platform.

[0013] If the tipping axis is located above the bottom of the container but below the container edge, the distance between the tipping axis and the container edge bridges the gap between the suction dredger and the transport vehicle. If this is insufficient, it is advantageous if the tipping axis is horizontally adjustable, thus bridging the gap between a suction dredger and a transport vehicle.

[0014] Furthermore, a safety cable is provided, with one end attached to the superstructure of the suction dredger and the other end to the front and / or rear wall of the container. The safety cable secures the container against complete tipping when it reaches its end position during the tipping process, in the event of a ruptured hydraulic cylinder.

[0015] Because the safety cable secures the container against tipping over, the overall center of gravity of the vehicle remains within the vehicle's boundaries, so the suction dredger does not tip over.

[0016] In a preferred embodiment, the tipping axis is arranged parallel to the longitudinal axis of the chassis, so that the container can be emptied along the longitudinal side of the suction dredger. Because the container is longer than it is wide, lateral tipping is thus faster and therefore more economical.

[0017] Construction vehicles are usually large and difficult to maneuver. For unloading, it's easier to position them side by side than at right angles to each other.

[0018] At least one hydraulic linear motor is provided for tilting the container. Its first end is preferably attached to a front and / or rear wall of the container, and its second end is preferably attached to a chassis structure at a distance from the tilting axis. As a result of this arrangement, the hydraulic linear motor pivots the container around the tilting axis during extension. Piston-cylinder drives are tried and tested and reliable. Moments about the transverse axis of the container are avoided by using one hydraulic linear motor mounted on each of the front and rear walls and operating synchronously.

[0019] To bridge the gap between the suction excavator and the transport vehicle, the suction excavator has a telescopic extension for shifting the tipping axis of the container. With the telescopic extension fully extended, the tipping axis is located outside one of the suction excavator's longitudinal sides. This simplifies emptying the container onto the flatbed of the adjacent vehicle. In practice, due to their size or the ground conditions, suction excavators and transport vehicles can only be positioned side-by-side within certain tolerances.

[0020] Advantageously, the telescopic device includes at least one hydraulic axle adjustment drive and a linear guide. Telescopic devices designed in this way are reliable and infinitely adjustable. Therefore, different heights of flatbed trucks can be achieved. The height of the tipping axle can be adjusted to prevent excessive impacts from falling material onto the flatbed.

[0021] If the telescoping device is arranged at an angle between 0° and 90°, particularly between 6° and 30°, preferably 20°, to the vertical, the tilting axis is automatically shifted vertically towards the longitudinal side of the suction dredger as the height increases. Separate drives for the horizontal and vertical components of the movement are therefore not required.

[0022] Ideally, a bolt for shortening the safety cable, in particular an extendable bolt, preferably one arranged in the chassis parallel to the longitudinal axis, is recessed into the structure. Capturing and redirecting the safety cable using a bolt is simple and cost-effective.

[0023] A preferred embodiment of the invention is explained by way of example with reference to figures. These show: Figure 1a a suction dredger in a side view, Figure 1b the suction dredger from Figure 1a in a rear view, Figure 2 a container with superstructure, telescoping device and hydraulic linear motor, Figure 3 the in Figure 2 Figure 4a shows a container with an open lid and extended telescopic arm, Figure 4b a suction dredger with an open lid and tilted container in a side view, Figure 4b the suction dredger made of Figure 4ain a rear view, Figure 5 shows a setup with a tilted container with the telescopic device fully extended, and Figure 6 shows a setup with a tilted container with the telescopic device retracted.

[0024] Figure 1a Figure 1 shows a suction excavator 1 with a lid 24 that closes a container 5. The container 5 rests on the chassis 2 in a transport position. From front to back, the suction excavator 1 is divided into a driver's cab 26, equipment cabinet 27, and suction blower 3. This is followed by the container 5 with its lid 24. A support 25 is welded to the chassis 2 both in front of and behind the container 5. A suction nozzle 4 opens at the rear end of the lid 24. An opening for this purpose is provided in the lid 24. Figure 1b). Figure 1b shows the suction dredger 1 according to Figure 1a with two parallel side walls 7 and a rear wall 9 in a rear view, i.e., the view is of the rear part of the suction dredger 1.

[0025] From top to bottom, the figure shows that the lid 24 is articulated to a lifting device 29 and a support strut 28. Extending the lifting device 29 pivots the lid 24 about a lid pivot axis 30, opening the container 5 upwards to the side. The support strut 28 is welded at an angle to a superstructure 16. On the left side, the telescoping device 10, which consists of a hydraulic axis adjustment device 21 and a linear guide 18, is also welded at an angle to the superstructure 16. The superstructure 16 is rigidly connected to the chassis 2. A tilting linear motor 13 is located approximately in the center of this view. In the transport position of the container 5 shown, the side walls 7 of the container 5 lie parallel to two longitudinal sides 17 of the suction dredger 1. A bolt 19 is embedded in the support strut 28. Due to the weight of a safety rope 20 ( Figure 5 / 6In its relaxed state, this hangs down so that the extended bolt 19 securely catches the safety cable 20. The tilting linear motor 13 is connected to the rear wall 9 of the container 5 by means of a bracket 31. For this purpose, the bracket 31 is welded to the container 5 via a frame 36. The bracket 31 thus forms a cantilever that tapers from its welded end to its free end. At the free end, the bracket 31 is pivotally mounted on the hydraulic tilting linear motor 13.

[0026] Figure 2Figure 16 shows the superstructure with container 5 and chassis 2. The superstructure 16 is shown in its transport position. In this transport position, the telescoping device 10 and the tilting linear motor 13 are retracted. In the retracted state, the tilting linear motor 13 is angled to a vertical 22. A tilting linear motor axis 35 of the tilting linear motor 13 runs parallel to the support strut 28. In the transport position, a tilting axis center 11 is located above the supports 25, so that vertical forces introduced into the telescoping device 10 via the tilting axes 11 are transferred to the ground via the support 25. For this purpose, the linear guide 18 of the telescoping device 10 is welded to the superstructure 16 and the supports 25.

[0027] The Figure 3 shows the structure made of Figure 2During the unloading process, the contents of container 5 are tipped onto the flatbed (not shown) of a transport vehicle (not shown). The tipping axis 11 is extended to its end positions by means of the telescopic device 10. The end position of the tipping axis 11 is located outside the longitudinal side of the vehicle. The tipping axis 11 is offset from its transport position by a height 32. The tipping axis 11 is located above the height of the flatbeds of conventional transport vehicles, so that the contents of container 5 can be tipped onto the flatbed of the transport vehicle. In the emptying position, the lid 24 is tilted by means of the lifting device 29, so that by simultaneously extending the telescopic device 10 and the tilting linear motor 13, the container 5 can be lifted from its transport position into the upper tipping position.

[0028] Figure 4aFigure 1 shows the suction dredger 1 in its side view – specifically the driver's side – with the container 5 tilted. The tilting linear motors 13 are fully extended. In practice, the outriggers 25 are lowered to the ground to lift the rear part of the suction dredger 1.

[0029] Figure 4b shows the suction dredger 1 from Figure 4a The rear view, i.e., the view is of the rear of the suction dredger 1, shows the container 5 tilting. To tilt the container 5, the tilting linear motor 13 is fully extended, so that the container 5 has been rotated about the tilting axis 11 and its contents can slide out.

[0030] Figure 5 Figure 16 shows the assembly from the rear with the transport container 5 tilted at 135° in the extended position of the telescopic device 10. The securing cable 20 is taut and secures the container 5. With the telescopic device 10 extended, the bolt 19 is retracted. The entire length of the cable is required for securing.

[0031] Figure 6shows container 5 with structure 16 according to Figure 5With the container 5 tilted, the telescopic device 10 is in its transport position. The bolt 19 is extended, so that the safety cable 20 was caught by the bolt 19 during tilting and is now redirected. The tilting linear motor 13 is mounted on the superstructure with its piston rod end, the second end 15. The end 14 is mounted in the bracket. Before emptying the container 5, the supports 25 are first lowered so that the suction excavator is positioned precisely and stably relative to the ground. To empty the container 5, the lid 24 is first opened using the lifting device 29. Subsequently, depending on the height of the flatbed of a transport vehicle (not shown) ready to receive the container contents, which is positioned parallel to the suction excavator 1, the tilting axis 11 can be adjusted in height using the telescopic device 10.For this purpose, the tilting linear motor 13 and the telescopic device 10 are extended simultaneously until the tilting axis 11 reaches the desired height above the platform of the transport vehicle. Subsequently, the tilting linear motor 13 extends, tilting the container 5 until its contents slide onto the platform of the transport vehicle. In the emptying position, the tilting axis 11 has a tilting height 33 of approximately 2 m. After the container material has been unloaded, the container 5 is returned to its transport position, the lid 24 is closed, and the supports 25 are retracted. Reference number list

[0032] 1 Suction excavator 2 Chassis 3 Suction blower 4 Suction nozzle 5 Tank 6 Tank bottom 7 Side wall 8 Front wall 9 Rear wall 10 Telescopic device 11 Tipping axle 12 Longitudinal axis 13 Tilting linear motor 14 First end 15 Second end 16 Superstructure 17 Longitudinal side 18 Linear guide 19 Bolt 20 Safety cable 21 Hydraulic axle adjustment device 22 23 Vertical 24 Cover 25 Support 26 Operator's cab 27 Equipment cabinet 28 Support strut 29 Lifting device 30 Cover pivot axis 31 Console 32 Height 33 Tipping axle height 34 Coupling link axis 35 Tilting linear motor axis 36 Frame

Claims

1. Suction dredger (1) comprising - a chassis (2) having a suction blower (3) mounted thereon, - a suction spout (4), - a tank (5), arranged between the suction spout (4) and suction blower (3) in the flow direction and that can be tilted about a tilt axis (11), for depositing and collecting suctioned material, characterised in that the tilt axis (11) is arranged above a tank base (6) and in the upper half of the tank (5), wherein the suction dredger (1) has a telescoping device (10) for displacing the tilt axis (11) of the tank (5), wherein the tilt axis (11) is arranged outside a longitudinal side (17) of the suction dredger (1) with the telescoping device (10) extended to the maximum, and wherein a safety cable (20) is provided, wherein a first end of the safety cable (20) is fixed on the structure (16) of the suction dredger (1) and a second end of the safety cable (20) is fixed on the front wall (8) and / or the back wall (9) of the tank (5).

2. Suction dredger (1) according to claim 1, characterised in that the tilt axis (11) is arranged parallel to the longitudinal axis (12) of the chassis (2).

3. Suction dredger (1) according to claim 1, characterised in that at least one hydraulic linear motor (13) is provided for tilting, having a first end (14), which is preferably fixed on a front wall (8) and / or on a back wall (9) of the tank (5), and a second end (15), which is preferably fixed on a structure (16) of the chassis (2).

4. Suction dredger (1) according to claim 1, characterised in that the telescoping device (10) has at least one hydraulic axis adjusting drive (21) and a linear guide (18).

5. Suction dredger (1) according to claim 1, characterised in that the telescoping device (10) is arranged with respect to a perpendicular (22) at an angle between 0° and 90°, in particular between 10° and 30°, preferably 20°.

6. Suction dredger (1) according to claim 1, characterised in that a bolt (19) is provided for shortening the safety cable (20), in particular an extendable bolt (19), preferably a bolt (19) arranged in the chassis (2) parallel to the longitudinal axis (12).

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