Material collection container for a suction excavator with improved resistance to negative pressure

Abstract

The invention relates to a material collection container (01) of a suction excavator. The material collection container extends in the longitudinal direction of the suction excavator and comprises a container wall (02) which is closed at its two end sides by end walls. A cover (06) is pivotably supported on a cover shaft such that the material collection container is closed in the upper side in the closed position and is opened in the emptying position. Furthermore, the material collection container has a seal (07) which extends between the upper rim (08) of the material collection container and the cover in the closed position, so that in the closed position the seal seals off the material collection container such that a negative pressure can be produced in the container. The material collection container has a substantially u-shaped cross section. The container wall has a plurality of side section faces (09) which extend in the longitudinal direction, which merge into one another at a reinforcing rim. At least some of the side section faces are angled to one another. The chamfered upper rim (08) is configured as a hollow profile. The seal (07) is embedded in a groove (12) of the side of the cover (06) which points towards the upper rim (08). The invention also relates to a suction excavator having such a material collection container.

Description

Technical Field

[0001] This invention relates to a material collection container for a suction excavator. The material collection container has a container wall extending in a longitudinal direction, a pivotable lid, and a seal between the upper edge of the material collection container and the lid. The invention also relates to a suction excavator having such a material collection container. Background Technology

[0002] A particular application in the field of mobile working machinery is the so-called suction excavator, which is regularly equipped with a material collection container to hold the material being sucked up.

[0003] A suction excavator is known from DE 38 37 670 A1, which includes a pneumatic suction nozzle, a collection container for the soil or similar material to be sucked up, and a suction fan connected to the collection container for generating a suction airflow. The suction nozzle is introduced into the collection container, and the sucked material is separated from the suction airflow in the collection container. Other common components of a suction excavator include guide elements for the suction nozzle and filters for cleaning the suction air before it leaves the collection container and is output to the environment. In the configuration of the suction excavator described in this document, a collection container is used, which can alternatively be tilted toward its respective vehicle side about one of two tilting axes extending in the longitudinal direction of the vehicle, in order to empty the material deposited in the collection container.

[0004] EP 3 436 306 B1 describes a vehicle, particularly a suction excavator having a chassis, a tiltable material collection container suspended on a tilting axis extending parallel to the vehicle's longitudinal axis, a telescopic device, and at least one rotary drive device arranged at the container-side end of at least one telescopic boom, so as to enable the material collection container to rotate about the tilting axis.

[0005] DE 10 2016 105 850 B4 illustrates a material collection container for a suction excavator, wherein the material collection container can be closed by at least a two-piece cover. The material collection container has a flat upper edge, on which the cover is positioned in the working position to seal the container, thereby creating a negative pressure within the container.

[0006] EP 0 749 870 A1 relates to a commercial vehicle in the form of a dump truck that can be emptied to the rear. The dump truck includes a container formed by a self-supporting wall, which is constructed of simple steel plate. The wall is U-shaped and formed by mutually angled sections.

[0007] CN 202243117 U illustrates a truck comprising a cargo box and a roof. The cargo box opens upwards. The roof is disposed on the upper side of the cargo box and closes the opening. The cargo box consists of a floor and cargo walls extending upwards around the floor. The roof consists of a cover plate and side walls extending downwards around the roof. The roof is fastened to the cargo box, thereby positioning the side walls outside the cargo box walls. Seals disposed on the roof prevent gas from escaping from the cargo box.

[0008] A suction excavator with a pivotable filtration unit is disclosed in DE 10 2017 108 731 B4. This suction excavator has a tiltable material collection container and a cover that closes it in the working position. The material collection container also has a flat upper edge.

[0009] Material containers for construction vehicles can generally be categorized into two basic structural forms. Round containers are typically used for transporting liquids and gases, while tipper containers with angled cross-sections are commonly used in construction vehicles for transporting materials such as soil. Round containers, such as those in tank trucks, are very costly to manufacture because they must be produced as uniformly as possible to withstand existing pressure. However, they offer optimal loading volume and high compressive strength at a relatively low weight. Another disadvantage is that the emptying of round containers is usually done through a small opening at the rear, resulting in longer loading and unloading times. In contrast, tipper containers are significantly faster and easier to load and empty through large openings. However, tipper containers also have high manufacturing costs due to the numerous necessary reinforcements on the essentially flat container walls, requiring many welds to achieve the desired high rigidity. This results in higher self-weight, numerous surfaces exposed to corrosion and fracture, and non-sealing at weld joints.

[0010] Because suction excavators use negative pressure to contain material, it is particularly important that the negative pressure generated by the blower unit is as lossless as possible until it reaches the suction sleeve to contain the material. However, known suction excavators (which have a material collection container that is to be sealed by a cover) have significant drawbacks. The negative pressure required for the suction process can only be generated by the installed blower unit if the collection chamber is sealed tightly and no secondary air is drawn in. The seal between the cover and the collection chamber may have been severely compromised due to structural tolerances resulting from manufacturing. To ensure a good seal, a seal is therefore used in the contact area between the cover and the suction chamber. However, this also presents a problem: firstly, during the evacuation process, a portion of the material evacuated from the collection chamber often remains on the flat upper edge of the collection chamber or the seal, which can significantly impair the seal and / or damage the seal when the cover is closed. Therefore, the suction material remaining in the sealed area must be manually removed before closing the cover. This results in wasted work and sometimes poses a hazard to operators, as the area to be cleaned is difficult to access. Furthermore, the sealing cords with most circular cross-sections often slip off their supports due to horizontal movement, such as during travel, or due to frequent opening and closing of the cover. This, in turn, leads to non-sealing or damage to the seal. Summary of the Invention

[0011] Therefore, based on the prior art, the objective of this invention is to provide an improved material collection container for a suction excavator that ensures high rigidity with low material and manufacturing costs, while simultaneously ensuring improved negative pressure sealing so as to provide the required suction negative pressure with low energy consumption.

[0012] This task is solved by a material collection container according to the invention or by a suction excavator having such a container according to the invention.

[0013] The material collection container according to the invention is designed for use as a component of a suction excavator. The material collection container extends in the longitudinal direction of the suction excavator and includes a container wall extending in that direction. The longitudinal direction corresponds to the travel direction of the suction excavator. The container wall is closed at both ends by a front or rear end wall, thereby creating a basin-shaped internal space. The lid of the material collection container is pivotally supported on a cover shaft. In a closed position, the lid closes the material collection container on its upper side, and in an empty position, it opens the material collection container to allow it to be emptied, i.e., the sucked material can be removed. For this purpose, it is not primarily important whether the material collection container is emptied by pivoting and tilting or, for example, by means of a clamp. Furthermore, the material collection container has a seal disposed between its upper edge and the lid, such that the material collection container is sealed in the closed position of the lid, so that a negative pressure can be created within the material collection container for suction operation. In a closed-loop configuration, the material collection container is thus airtightly sealed, and for this purpose, the container walls and end walls must also be sealed to each other under any circumstances within the negative pressure range required for the operation of the suction excavator.

[0014] The material collection container has a generally U-shaped or basin-shaped cross-section, wherein the bottom, sides and end faces are designed to be airtight, and the top of the container can be airtightly closed by a pivotable lid.

[0015] The container wall has multiple side sections that merge at reinforcing edges. These reinforcing edges extend in the longitudinal direction of the material collection container, preferably parallel to the vehicle's longitudinal axis. Particularly preferably, multiple or all such reinforcing edges extend parallel to each other. Furthermore, at least some, preferably multiple, side sections are arranged at an angle to each other, thus forming a U-shaped cross-section of the material collection container. The container wall has an upper edge constructed as a hollow profile from chamfered sections of the container wall, which in any case closes on the upper side facing the lid, preferably circumferentially. This results in an upper edge with a smooth surface, particularly unaffected by welds. The advantage of this embodiment is that the smooth surface resists abrasion when material is poured along the edge during container emptying. Furthermore, despite strong turbulence in the suction container, no undesirable deposits or noise formation occurs at the welds.

[0016] By utilizing the chosen U-shaped cross-section, the hollow profile design of the upper edge, and the segmented structure of the container wall, along with the resulting reinforced edges, high rigidity of the material collection container is achieved with low material usage, especially with relatively thin wall thicknesses. Therefore, the material collection container can be designed for operating pressures (i.e., negative pressures up to -0.65 bar) without experiencing irreversible deformation during the operation of the suction excavator.

[0017] Preferably, the multiple adjacent side sections are constructed as a single unit, meaning that the reinforcing edges extending between them are manufactured by reshaping rather than splicing. Particularly preferably, the adjacent, mutually inclined section surfaces form an angle of >90° to <180°, preferably 110° to 170°, at the reinforcing edge they are enclosed. According to a preferred embodiment, the multiple section surfaces are formed from a single sheet metal piece and are divided by the reshaped reinforcing edges.

[0018] It should be noted that, due to manufacturing limitations, in many cases, the entire container wall cannot be manufactured from a single piece. However, the present invention aims to achieve a situation where the pieces to be connected by splicing processes (e.g., welding or edging) are few in number and instead manufactured as large surface extensions. Subsequently, reinforcing edges are formed as ribs or similar shapes, thereby improving surface rigidity while avoiding leak-prone connections. Of course, the various sections of the material collection container can also be additionally equipped with reinforcing elements, such as supports.

[0019] Preferably, the width of the unreinforced side sections is no greater than their respective material thickness or 150 times their thickness, particularly preferably no greater than 100 times their respective material thickness. Preferably, the optimized geometry of the side sections is designed and known using appropriate model calculations, for example, by means of the finite element method (FEM). Taking into account the geometry, the distribution of bearing forces, the known line loads, and the maximum bending moment and the resulting bending stress, a suitable design formula can be determined, thereby revealing the yield strength R of the material. e The following explanation is particularly applicable to determining R. e The formula:

[0020]

[0021] in,

[0022] R e = Yield strength of the material

[0023] p = Measurement of negative pressure, unit: N / mm 2

[0024] x = the ratio of segment length l to segment width b

[0025] t = plate thickness

[0026] b = Segment width

[0027] l = segment length

[0028] Using this design formula, the optimal segment width of the side sections and the positioning of the reinforcing edges within the container wall can be approximately determined, thereby achieving the largest possible volume for accommodating the suction material while maintaining the high inherent rigidity of the material collection container. The container wall of the material collection container (formed by the side sections obtained using the above design formula) should be simulated and its load-bearing capacity verified using the finite element method (FEM).

[0029] According to the modified embodiment, at least one additional reinforcing element is arranged on the side section surface, which preferably has a width greater than 150 times its material thickness. The additional reinforcing element may be in the form of a beam or profile, preferably constructed on the outer side of the section surface, thereby improving the rigidity of the section surface and preventing deformation.

[0030] Preferably, the material collection container has one or more bottom sections that form the bottom of the container on the underside. The bottom sections are also preferably fused together at reinforcing edges. However, additional rigidity can be created in this area by supplementary reinforcing elements, preferably arranged on the outer side of the bottom sections. This can be primarily applied in areas of contact surfaces or other force-introducing points.

[0031] In a preferred embodiment, the material collection container has a particularly reinforced side section arranged on the side of the container that allows it to be tilted for emptying. This reinforced side section preferably has additional reinforcing elements on its outer side. This also ensures increased rigidity, so that there is no need to worry about deformation or damage to the container wall even during emptying. Because the reinforced side section remains as flat and unobstructed as possible on its inner side, the suction material can slide more easily and without residue along this surface during the emptying positioning of the material collection container.

[0032] A seal for sealing the upper edge of the cap is embedded in a groove that extends on the underside of the cap toward the material collection container and extends parallel to the upper edge of the material collection container in the closed position of the cap. It should be noted that in modified embodiments, the seal may also be fastened in other suitable ways, as long as the airtightness between the upper edge and the cap is still ensured.

[0033] Preferably, the seal has a rectangular cross-section selected to fit the width of the groove, such that the seal sits firmly within the groove and will not pop out even in the event of vibration or movement. The upper edge to be sealed extends at least along the side wall of the collection chamber of the material collection container, and preferably along the entire side wall of the material collection container when the material collection container is to be completely sealed. The upper edge is preferably formed in its extension by two edge faces that intersect each other at an angle, such that the edge faces of the upper edge form an angle α and a converging line extending in the sealing plane. The upper edge has a width at the converging line of the intersecting edge faces that is preferably less than the width of the groove, such that during sealing, the upper edge is recessed into or pressed into the seal. This forms a sealing line along which the seal surrounds the upper edge on both sides. This results in a consistently high sealing effect, even with tolerances or the possibility of minor damage in the extension of the upper edge. Furthermore, a significant advantage of this preferred shape of the upper edge is that there is no horizontal surface at this edge, where material residue would deposit when the cap is opened. In particular, even when the material collection container is emptied, all of the sucked material immediately falls off the upper edge, thus preventing it from being trapped between the seal and the upper edge when the cap is closed. The embodiment of the upper edge with two mutually inclined edge surfaces (preferably integral at the converging edges and fused together without unevenness) also results in high inherent stability of the upper edge due to the rigidity caused by the profile, and simultaneously provides protection for the seal by avoiding sharp edges that could damage it. Particularly preferably, the seal has a closed surface or at least low porosity, preventing particles of the sucked material from accumulating in the pores and thus abrading the seal. This ensures easier cleaning and a long seal life.

[0034] The combination of the material collection container formed according to the invention and the seal disposed on its lid according to the invention (which works in conjunction with the correspondingly designed upper edge) results in a stable, relatively lightweight, and still airtight material collection container. The U-shaped cross-section reinforces the material collection container, ensuring that twisting or deformation of the upper edge is safely avoided even under the required negative pressure within the container. This is an important prerequisite for a durable, airtight seal achieved by the lid supporting the seal. Simultaneously, the upper edge, preferably trapezoidally shaped in cross-section, prevents the adhesion of dirt particles or other deposits, which could thus compromise the sealing effect. Through the combined application of these features, it is possible to generate a relatively stable negative pressure within the material collection container using the ventilator or blower of a suction excavator, minimizing pressure loss due to the container's lack of a seal. Therefore, the dynamic negative pressure required at the suction sleeve of the suction excavator can be generated with less energy consumption.

[0035] Preferably, the seal is a soft seal, thereby better absorbing motion and better compensating for structural tolerances caused by the manufacture of the material collection container. Due to the soft-sealing material of the seal, the upper edge of the collection chamber can preferably be pressed into the seal by about 3 to 15 mm. A better sealing effect occurs here because the seal adapts to the rounded portion of the upper edge. Therefore, considerable structural tolerances can be compensated over a larger surface area. Thus, the negative pressure, typically generated in suction excavators up to -0.65 bar, can be maintained with less energy consumption. As the negative pressure increases during the operation of the suction excavator, the cover, including the seal, is drawn in more forcefully. Because the seal is shape-locked within a groove in the cover, the seal can only shift towards the upper edge, thus providing a more secure seal for the material collection container.

[0036] Preferably, the upper edge of the material collection container is designed in a triangular or trapezoidal shape in cross-section, especially as a hollow profile. Preferably, the angle α formed by the two edge faces of the upper edge is approximately 20° to 120°, particularly preferably between 45° and 90°. This angle range results in high rigidity of the profile, resisting deformation of the upper edge due to negative pressure in the collection chamber and the squeezing force of the cover. This extends the service life of the seals of the material collection container. Furthermore, such an inclined edge face of the upper edge has the advantage that little or no suction material adheres to the edge face. Here, the smaller the angle, the greater the self-cleaning effect on the edge face. This also eliminates the manual cleaning process known in the prior art, thereby ensuring a frictionless operation of the suction excavator. Moreover, the suction flow in the collection chamber is deflected by the inclined edge face inside, resulting in less wear from the suction material in the suction flow on the inner edge face and the seals located within the groove.

[0037] Preferably, the upper edge has an outer radius in the range of 8–65 mm, particularly preferably 10–25 mm, at the convergence line of the edge surface. This results in an upper edge with a smooth surface that is also wide enough for effective sealing. An advantage of this embodiment is that the seal is protected during closure positioning because the force generated when the cap is placed on the upper edge acts on the rounded surface. Furthermore, the smooth surface resists wear during emptying positioning when the suction material is poured along the edge.

[0038] The present invention also relates to a suction excavator having a material collection container according to one of the embodiments described above. Preferably, the material collection container is fastened to the vehicle such that it can be tilted toward the longitudinal side of the vehicle. In particular, it is possible to tilt the material collection container on both sides of the vehicle.

[0039] It is also suitable to provide an elevated positioning with a tilting axis to allow the material collection container to be emptied onto surfaces at different heights, such as adjacent vehicles. Preferably, the tilting axis extends in a plane of symmetry of the material collection container, which preferably includes the vehicle's longitudinal axis in the resting, operating, or transporting state.

[0040] Preferably, in addition to the features described above, the material collection container also has other components. The material collection container preferably includes a suction inlet at its rear end wall and a suction flow guide that leads from the suction inlet through the already mentioned collection chamber to the filter unit, and then, after the filter unit, to the exhaust outlet via a fan. Furthermore, the material collection container preferably includes rotary bearings on each of its two end walls, which allow the material collection container to be suspended on a tilting axis.

[0041] Compared to previously known container shapes, such as those used to date in suction excavators, the material collection container offers significant advantages due to its reinforced edge design. The large opening (which can be closed with a lid) further facilitates the rapid removal of suction material. Furthermore, the reinforced edges in the container walls eliminate the need for separate reinforcements or reduce their number in any case, resulting in a low self-weight while maintaining high rigidity. Finally, a larger volume can be used for material collection compared to conventional material collection containers. The combination of the reinforced edge in the container walls and the upper edge, shaped as a hollow profile, achieves very robust edges while simultaneously providing optimized contact surfaces with the seal in the lid. Attached Figure Description

[0042] Further details, advantages, and improvements of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. Wherein:

[0043] Figure 1 A first general view of the material collection container according to the invention is shown;

[0044] Figure 2 It shows according to Figure 1 Detailed cut view of the material collection container;

[0045] Figure 3 A second general perspective view of the material collection container is shown;

[0046] Figure 4 The cross-section of the container wall of the material collection container is shown in the early stages of the design process.

[0047] Figure 5 A simplified cross-sectional view of the container wall in the region along its upper edge is shown;

[0048] Figure 6 A simplified cross-sectional view of the material collection container in the sealed area is shown;

[0049] Figure 7 A side view of the material collection container is shown;

[0050] Figure 8 A general perspective view of the material collection container is shown. Detailed Implementation

[0051] Figure 1 A first general perspective view of a material collection container 01 according to the invention is shown. In the illustrated embodiment, the material collection container is closed and has a lid 06, which is constructed as a single piece in this case. Embodiments with multi-piece lids are also possible. The material collection container has at least one collection chamber 23. Figure 6 The material to be contained is sucked into it. Furthermore, a tilting axis 18 extends longitudinally through the material collection container 01, which can be suspended on the chassis of a suction excavator (not shown). Additionally, the material collection container 01 includes a suction connector 16 on its end wall. Rotary bearings 22 are also arranged on the end wall, through which the tilting axis 18 extends.

[0052] Figure 2 A detailed view of the material collection container (cutout A) is shown, the details of which are combined below. Figure 6 This will be elaborated further.

[0053] Figure 3 A second general perspective view of the material collection container 01 is shown. In the illustrated embodiment, the material collection container 01 is closed. A tilting axis 18 extends longitudinally through the material collection container in the longitudinal direction of the chassis (not shown) of the suction excavator, allowing the material collection container 01 to tilt about this axis for emptying when the cover is open.

[0054] The material collection container 01 has a container wall 02, which includes a plurality of side segments 09, each fused to the other at a reinforcing edge 04. The reinforcing edge 04 extends parallel to the longitudinal direction of the material collection container. In this embodiment, the container wall 02 includes eight side segments 09 on each side and additionally includes a bottom segment 10. The adjacent side segments 09 are oriented at an angle to each other, wherein the container wall bends inward at each reinforcing edge, bending by approximately 10° to 20° in the upper region of the container wall and by approximately 90° in the transition to the bottom segment. In other words, directly adjacent side segments enclose an angle in the range of ≥90° to <180°. During the design process, the reinforcing edges are positioned using the aforementioned FEM calculations, thereby increasing the overall rigidity of the material collection container compared to a container wall without reinforcing edges.

[0055] The width of the side section 09 is preferably no more than 150 times its material thickness. If a material thickness of, for example, 4 mm is chosen, the width of the side section is ≤40 cm.

[0056] In the illustrated embodiment, to further enhance the rigidity of the container wall, a plurality of reinforcing elements 11 are arranged as transverse supports on the outer side of the bottom section 10 and in the longitudinal direction. The reinforcing elements can be constructed as hollow profiles. When necessary, such reinforcing elements can also be placed on individual side sections and / or end sides, preferably on their outer sides.

[0057] exist Figure 1 and Figure 3 In the illustrated embodiment, the end wall 03 also has a section face and a reinforcing edge. The end wall is substantially perpendicular to the side section face 09 of the container wall 02. This improves the overall rigidity of the material collection container.

[0058] Figure 4 A cross-sectional view of the container wall 02 is shown, including the upper edge 08 of the material collection container 01 in the early design phase. For example, by using FEM simulation (see above), the cross-section of the container and the positioning of the reinforced edges can be progressively optimized until the desired compressive strength is achieved.

[0059] The side sections arranged on the flip side of the material collection container should be constructed to be as large and straight as possible, so that the suction material can slide out of the container more easily and with less resistance during emptying positioning.

[0060] The side section 09 can be formed by chamfering a sheet metal part at the reinforcing edge 04 or by multiple parts, such that they are preferably connected to each other by welding at the reinforcing edge 04. Depending on the size and manufacturing process, the reinforcing edge is formed as a chamfer / rib in the material of the container wall or as a weld or edging seam between the side sections.

[0061] Figure 5 A cross-sectional view of the material collection container 01 in the region of its upper edge 08 is shown. The upper edge 08 forms at least the upper edge of the collection chamber 23, but in a modified embodiment, it may also include the entire upper edge of the material collection container 01. Thus, the upper edge 08 extends at least at the upper end of the sidewall of the collection chamber 23. The upper edge 08 has two edge surfaces 13 that intersect each other at an angle, forming an angle α. This angle is preferably 20° to 160°, particularly preferably 45° to 90°, so that the edge surfaces 13 have a greater or lesser inclination relative to the horizontal plane. The two edge surfaces 13 are angled and intersect each other, forming a triangular or roof-shaped, preferably hollow, cross section. Alternatively, the cross section of the upper edge 08 may also be trapezoidal. Also for stability reasons, the edge is preferably designed as a hollow profile.

[0062] Figure 6 A cross-sectional view of a material collection container 01 in a closed configuration is shown, in which a lid 06 rests flat on an upper edge 08. The lid 06 is preferably constructed as a substantially flat plate. Alternatively, the lid 06 may be constructed in two or more pieces, or may have protrusions and / or recesses. A groove 12 extends under the lid 06, into which a seal 07 with a rectangular cross-section is form-fitted. The groove 12 may additionally have a continuous or segmental narrowing on its open side to prevent the seal 07 from falling off. The upper edge 08 extends below the groove 12 and is recessed into the seal 07 in the closed configuration.

[0063] The positioning of the cover 06 in the closed positioning is selected such that the upper edge 08 is pressed into the seal 07, for example, into 1 / 4 to 1 / 2 of the thickness of the seal 07.

[0064] Figure 7 A side view of the material collection container 01 is shown, with the lid 06 in its closed position. The lid 06 closes the material collection container 01 such that the upper edge 08 is pressed into the seal 07. Figure 6 One or more side sections 09 arranged on the flip side of the material collection container 01 form a surface that is much larger than the opposing side section and unobstructed on its inner side, thereby allowing the suction material to slide out of the container easily and with little resistance during emptying positioning, that is, when the material collection container is flipped. Therefore, a plurality of reinforcing elements 11 extending transversely to the longitudinal extensions of the aforementioned large side sections 09 are arranged on the outer side of the side sections, supporting the side sections at multiple points. These reinforcing elements 11 can simultaneously form supports for the flip axis 18 and for the rotary bearing 22 for end-side positioning.

[0065] Additional reinforcing elements 11 are arranged on the outer side of the bottom section 10, which are formed as transverse and longitudinal pillars, wherein the reinforcing element 11 extending in the longitudinal direction is preferably constructed as a hollow profile.

[0066] In the illustrated embodiment, the material collection container 01 has, for example, a height of approximately 1.8m (with the cover closed) and a width of approximately 1.9m to 2.4m (at its widest point). The length of the container is in the range of 3.5m to 4m. Of course, other sizes are also possible to adapt to the suction excavator to be equipped.

[0067] Figure 8 For example, corresponding to Figure 1 The perspective view again shows the overall view of the material collection container. In this view, the material collection container 01 is open, and the lid is not shown for simplicity. The container wall 02 consists of eight side segments 09 on each longitudinal side and a bottom segment 10 on the lower side. In this embodiment, the adjacent side segments 09 each form an angle in the range of ≥70° to <180°. The container wall preferably has a material thickness of 4 mm, and the width of each side segment 09 on the side opposite to the flip axis 18 between successively following reinforcing edges is approximately 35 cm.

[0068] exist Figure 8 In the illustrated embodiment, the end wall 03 also has a side section surface 09 and a reinforcing edge. The end wall 03 is substantially perpendicular to the side section surface 09 of the container wall 02. As described above, this improves the overall rigidity of the material collection container. The material thickness and width of the section mounted on the end side correspond to the material thickness and width of the section on the side of the container opposite to the flip axis. Furthermore, from Figure 8 As can be seen, in addition to the collection chamber 23, there are other chambers in the material collection container, such as the filter unit and the ventilation unit, which are located in other chambers.

[0069] List of reference numerals

[0070] 01 Material Collection Container

[0071] 02 Container wall

[0072] 03 end wall

[0073] 04 Strengthen the edges

[0074] 05 -

[0075] 06 Cover

[0076] 07 Seals

[0077] 08 Top edge

[0078] 09 Side Section

[0079] 10 Bottom Section

[0080] 11. Reinforcing components

[0081] 12 slots

[0082] 13 Edge surfaces

[0083] 14 -

[0084] 15 -

[0085] 16 Suction Connector

[0086] 17 -

[0087] 18. Flip the axis

[0088] 19 -

[0089] 20 -

[0090] twenty one -

[0091] 22 Rotary bearings

[0092] 23 Collection Room

Claims

1. A material collection container (01) for a suction excavator, wherein, The material collection container (01) extends in the longitudinal direction of the suction excavator and has rigidity to withstand negative pressure, the negative pressure corresponding to the operating negative pressure of the suction excavator, the material collection container comprising: - A container wall (02) extending in the longitudinal direction, the container wall being connected to an end wall (03) at both of its ends; - A pivotable cover (06) that closes the material collection container (01) on its upper side in a closed position and opens the material collection container in an empty position; - A sealing element (07) extends between the upper edge (08) of the material collection container (01) and the cover (06) in a closed positioning to seal the material collection container (01) so as to generate a negative pressure in the material collection container; Its features are, -The material collection container (01) has a substantially U-shaped cross-section; - The container wall (02) has a plurality of side sections (09) extending in the longitudinal direction, the side sections merging together at a reinforcing edge (04), wherein at least some of the adjacent side sections (09) are angled to each other. - The container wall (02) has a chamfered upper edge (08), which is constructed as a hollow profile; - The seal (07) is embedded in the groove (12) on the side of the cover (06) facing the upper edge (08); - The upper edge (08) is formed by two angled edge surfaces (13) that intersect each other, wherein the width of the upper edge (08) at the convergence line of the intersecting edge surfaces (13) is narrower than the width of the groove (12), wherein the upper edge is recessed into the seal (07) during the closed positioning of the cover (06).

2. The material collection container (01) according to claim 1, characterized in that, At least a plurality of adjacent side sections (09) are integrally constructed, including reinforcing edges (04) extending therebetween.

3. The material collection container (01) according to claim 1, characterized in that, The width of the unreinforced side section (09) is no more than 150 times its material thickness.

4. The material collection container (01) according to claim 1, characterized in that, The material collection container has one or more bottom sections (10).

5. The material collection container (01) according to claim 1, characterized in that, At least one additional reinforcing element is arranged on the outside of at least one of the side sections (09).

6. The material collection container (01) according to claim 1, characterized in that, At least one of the side sections (09) located on the side of the material collection container that allows it to be tilted and emptied has an additional reinforcing element (11).

7. The material collection container (01) according to claim 1, characterized in that, The two intersecting edge surfaces (13) of the upper edge (08) enclose an angle α of 20° to 90°.

8. The material collection container (01) according to claim 1, characterized in that, The upper edge (08) has an outer radius in the range of 8 mm to 65 mm at the convergence line of the intersecting edge surfaces (13).

9. The material collection container (01) according to claim 1, characterized in that, The upper edge (08) of the container wall (02) is designed to be triangular or trapezoidal in cross-section.

10. The material collection container (01) according to claim 1, characterized in that, The upper edge (08) is formed by a chamfered section of the container wall (02).

11. The material collection container (01) according to claim 1, characterized in that, At least some of the side sections (09) are defined by the following formula: in, R e = Yield strength of the material; p = Measurement of negative pressure, unit: N / mm 2 ; x = the ratio of segment length l to segment width b; t = thickness of the sheet material; b = Segment width; l = Segment length.

12. The material collection container (01) according to claim 1, characterized in that, The width of the unreinforced side section (09) is no more than 100 times its material thickness.

13. A suction excavator, wherein the suction excavator has: - Chassis with longitudinal direction; - A tiltable material collection container (01) suspended on a tilting axis (18) extending parallel to the longitudinal direction; Its features are, The material collection container (01) is designed according to any one of claims 1 to 12.

14. The suction excavator according to claim 13, characterized in that, The material collection container (01) also has a suction connector (16) at its rear end wall (03) and a suction flow guide, which guides the material collection container (01) from the suction connector (16) through the collection chamber (23) to the filter unit (17). The material collection container (01) also has a rotating bearing (22) at each of its two ends, which allows the material collection container (01) to be suspended on the flip axis (18).

15. The suction excavator according to claim 13, characterized in that, In the closed positioning, the lid (06) closes the entire material collection container (01) on the upper side of the material collection container, and in the closed positioning, the seal (07) extends between the upper edge (08) of the material collection container (01) and the lid (06) to seal the entire material collection container (01), thereby enabling a negative pressure to be generated in the material collection container.

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