Attachment for a working machine, in particular an excavator
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- KIESEL TECHNOLOGY TOOLS GMBH
- Filing Date
- 2026-01-20
- Publication Date
- 2026-07-30
Smart Images
Figure IB2026050477_30072026_PF_FP_ABST
Abstract
Description
[0001] Attachment for a construction machine, especially an excavator
[0002] The invention relates to an attachment for a working machine, such as a hydraulic excavator, wheel loader or the like.
[0003] From DE 41 38 619 A1, an attachment in the form of a bulk material collection container for an excavator is known. This bulk material collection container comprises a cylindrical housing with a suction inlet that opens tangentially into the cylindrical housing. A suction nozzle can be connected to the suction inlet to extract bulk material from an excavation. The bulk material collection container includes a suction outlet to which a suction hose can be connected. This hose is connected to a suction blower attached to the excavator to create a vacuum in the collection container. The cylindrical bulk material collection container further includes a pivoting discharge flap, which is provided on the underside of the cylindrical bulk material collection container to easily empty the collected bulk material.This cylindrical bulk material collection container has the disadvantage that fractionation of the aspirated bulk material and / or the fine dust from the suction stream is only possible to a limited extent, which leads to rapid clogging of the suction blower.
[0004] From DE 10 2006 045 084 B4, a suction device as an attachment for collecting bulk material in civil engineering or railway construction is further disclosed. This attachment comprises a first housing chamber, which is cylindrical in design. A suction inlet opens tangentially into this first housing chamber, to which a suction nozzle can be connected. Above the suction inlet, an outlet opening is provided in the cylindrical first housing chamber, which transfers the suction flow into a second, box-shaped housing chamber. Downstream of this second housing chamber is a suction blower, which conveys the suction flow to the surrounding environment via an outlet. The fractionation of the bulk material from the suction flow takes place in the cylindrical first housing chamber by a cyclone effect. This attachment-
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[0007] The disadvantage of this method is that only coarse bulk material can be fractionated, whereas bulk material with a medium or small particle size is not separated from the suction flow or only to a limited extent.
[0008] Furthermore, WO 2017 / 167625 A discloses a material collection container for a suction excavator. This container features a suction inlet on its upper side, leading into a collection channel that transfers the suction flow, along with the bulk material, into a subsequent collection chamber. This chamber contains a baffle plate to separate coarse particles. The suction flow then passes into a pre-separator and subsequently into a filter unit. From the filter unit, the suction flow exits into left and right air ducts, which are combined outside the collection chamber and fed to a suction blower. This material collection container has a complex design and is quite heavy, making it suitable for mounting on a vehicle but not for use as an attachment on a construction machine.
[0009] The invention is based on the objective of proposing an attachment for a working machine which enables effective fractionation of particles from a suction stream.
[0010] This task is solved by an attachment for a machine with a suction device for capturing and cutting off particles from a suction stream, wherein the suction device comprises a housing for receiving particles. The housing has a suction inlet for connecting a suction tool, in particular a suction nozzle, and a suction outlet for connecting a suction blower that generates the suction stream. A suction flow guide is formed between the suction inlet and the suction outlet. The housing includes a first housing chamber, which is associated with the suction inlet, and at least one second housing chamber, which is located downstream of the first housing chamber in the direction of flow. The first housing chamber and the at least one further housing chamber are connected by at least one inlet opening and by a
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[0013] A baffle plate, inclined or perpendicular to the direction of the suction flow, separates the particles. This suction device offers the advantage that the baffle plate, projecting into the suction flow and inclined or perpendicular to its direction, allows for at least partial separation of the particles carried in the suction flow. Furthermore, this baffle plate can alter the flow direction and / or velocity, thus further supporting fractionation. The addition of at least one further housing chamber downstream of the first chamber in the direction of the suction flow allows for a more compact design of the suction device. The particles in the suction flow can include bulk materials, sand, excavated material, wastewater, or similar substances.The attachment can preferably be operated as a dry vacuum cleaner, a wet vacuum cleaner or a damp vacuum cleaner.
[0014] Preferably, the suction inlet is positioned on an end face of the housing, particularly close to or adjacent to the top of the housing, and the suction outlet is located further away from the suction inlet and is situated on an upper surface of the housing, particularly an end face, or on the opposite end face from the suction inlet. This arrangement has the advantage of achieving long flow paths within the housing, thereby improving the fractionation of the bulk material from the suction stream. It also offers the advantage of enabling uniform filling of the first housing chamber. For example, larger and heavier particles near the suction inlet can detach themselves from the suction stream by gravity and collect on the bottom, while lighter particles can collect on the bottom further away from the suction inlet.
[0015] At least one further housing chamber is preferably provided in the housing of the extraction device and is arranged remotely from the suction inlet and associated with the suction outlet. This allows the suction flow to pass through the suction inlet after entering the housing.
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[0018] It has a longer free flow cross-section and can widen, allowing even coarser or heavier particles to separate themselves from the suction flow. At least one additional housing chamber can enable further particle fractionation.
[0019] According to a preferred embodiment, the at least one further housing chamber comprises a baffle plate and at least one housing wall, wherein the baffle plate connects to a top surface of the housing and an inlet opening into the at least one further housing chamber is provided at the end of the housing wall opposite the baffle plate. In particular, it can be provided that, viewed in the direction of flow, the baffle plate blocks a direct flow direction from the suction inlet to the suction outlet. Furthermore, this can achieve flow deflection.
[0020] According to an alternative embodiment, the at least one further housing chamber comprises a baffle plate and at least one housing wall, wherein the baffle plate is arranged at a distance from the top of the housing, such that the inlet opening for the further housing chamber is formed between the top of the housing and the baffle plate, and the housing wall preferably abuts the end face opposite the suction inlet. In particular, the inlet opening and the baffle plate of the at least one further housing chamber can be positioned upstream of the suction outlet in the flow direction. The inlet opening allows for flow deflection from bottom to top towards the top of the housing.
[0021] The baffle plate of at least one further chamber is positioned, viewed against the direction of the suction flow, at least upstream of the suction outlet, and in particular at a distance of one-third to one-half the length of the housing from the rear end face of the housing. This ensures a uniform deposition and distribution of the dirt particles on the bottom of the housing.
[0022] Another advantageous embodiment provides that at least one third housing chamber is included in the housing. The third
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[0025] The housing chamber is arranged, in particular, within the second housing chamber. This allows for multiple flow deflections. It is preferable that the inlet opening of the third housing chamber be smaller than the inlet opening of the second housing chamber, thereby increasing the flow velocities. Additionally or alternatively, the flow deflection from the second housing chamber to the third housing chamber can be more pronounced than the flow deflection from the first housing chamber to the second housing chamber. This allows, for example, coarse particles to be collected in the first housing chamber, medium and / or smaller particles to be collected in the second housing chamber, and fine particles to be collected in the third housing chamber, or it may prevent any particles from entering the third housing chamber.
[0026] According to a preferred embodiment, the second housing chamber may comprise a baffle plate and at least one housing wall, wherein the baffle plate is arranged at a distance from the top of the housing and forms an inlet opening, and the housing wall connects to the end face of the housing opposite the suction inlet. The third housing chamber is provided within the second housing chamber, also comprising a baffle plate and at least one housing wall, wherein the baffle plate connects to the top of the housing and the inlet opening is formed at the end of the housing wall opposite the baffle plate. Alternatively, the aforementioned embodiments of the second and third housing chambers may be arranged in the housing in a reversed order with respect to the flow direction to the suction outlet.
[0027] According to a further preferred embodiment of the attachment, a flow deflector is provided in the housing of the extraction device upstream of at least one housing chamber, viewed in the direction of flow. This flow deflector is arranged, in particular, on the top of the housing and projects into the interior of the housing. This flow deflector can be inclined, analogous to the baffle plate, or oriented perpendicular to the suction flow.
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[0030] This can force a further deflection of the flow, which supports the fractionation of the bulk material from the suction gap.
[0031] In particular, it is provided that a flow deflection is provided before and / or after an inlet opening of at least one further housing chamber. This prevents the suction flow from being directed directly from the suction inlet through the inlet opening towards the suction inlet.
[0032] It is also possible to arrange for at least one flow deflector to be positioned upstream of a baffle plate in the next housing chamber, as viewed in the direction of flow. This allows for a kind of cascade-like flow deflection.
[0033] The drain flap is preferably pivotable and forms a side wall for the housing chambers arranged within the housing. This allows all housing chambers to be emptied simultaneously by opening the drain flap.
[0034] This drain flap or the opening in the housing to be closed advantageously has a circumferential seal. This allows sufficient negative pressure to be built up in the housing by the suction blower to generate the suction flow. In particular, it is provided that a seal is provided on an end face of the baffle plate and on the housing wall of the housing chamber facing the drain flap, in order to seal the respective housing chamber. Alternatively, these seals can also be provided on the drain flap itself.
[0035] In a preferred embodiment of the extraction device, the housing is rectangular or box-shaped. This allows for a simple design that also exhibits high rigidity.
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[0038] Preferably, the suction inlet is arranged centrally to a plane of symmetry of the housing at the end face of the housing. This ensures uniform filling of the first housing chamber with the suction gap.
[0039] Advantageously, the suction outlet is arranged off-center to the plane of symmetry on the top of the housing, particularly far from the discharge flap. This allows for a longer flow path within the housing. Furthermore, a coupling point for connecting to the driven machine can be positioned on the top of the housing, particularly in the center.
[0040] Furthermore, at least one filter device and / or sound attenuation device may be provided downstream of the suction blower in the direction of suction flow.
[0041] Advantageously, the extraction device has a connection point on the top of the housing for linking it to the machine. In particular, connections for controlling the suction fan and / or the actuator for opening and closing the discharge flap can be provided. Preferably, the connection point is positioned on a central, vertical axis of the housing. This connection point can, for example, be designed to connect the attachment to a rotator or tiltrotator.
[0042] The housing of the extraction device preferably includes an enclosure. This enclosure is particularly attached to the top of the housing. This enclosure preferably surrounds the suction fan and / or the filter device and / or the sound attenuation device and / or the actuator for the discharge flap and / or a valve block for controlling the suction fan and the actuator, all of which are arranged on the top of the housing. Preferably, all these components are arranged within the enclosure. This protects these components from damage and / or environmental influences. The enclosure may have at least one maintenance flap and / or a maintenance opening on its top and / or on the side wall sections.
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[0045] or be designed as a removable wall section, allowing access to the components located inside the enclosure from the outside. This enclosure can also provide sound insulation. Furthermore, it is preferable that the coupling point or connection device is located on an outer surface of the enclosure. Preferably, this coupling point is arranged or aligned on a top surface of the enclosure along a central axis, particularly a central vertical axis, ensuring a centered connection of the attachment to the rotator or tiltrotator. Advantageously, after the attachment is coupled to the rotator or tiltrotator, the central axis aligns with the rotational axis of the rotator or tiltrotator.
[0046] The invention, as well as further advantageous embodiments and developments thereof, are described and explained in more detail below with reference to the examples shown in the drawings. The features that can be derived from the description and the drawings can be applied individually or in any combination according to the invention. The drawings show:
[0047] Figure 1 shows a schematic view of a machine with an attachment,
[0048] Figure 2 shows a perspective view of the attachment according to Figure 1.
[0049] Figure 3 shows a schematic side view of a first embodiment of the attachment according to Figure 2.
[0050] Figure 4 shows a schematic side view of another embodiment of the attachment according to Figure 2.
[0051] Figure 5 shows a schematic side view of another alternative embodiment of the attachment according to Figure 2.
[0052] Figure 6 shows a perspective side view of an alternative embodiment with an enclosure compared to Figure 2, and
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[0055] Figure 7 shows a perspective view from above of the embodiment according to Figure 6.
[0056] Figure 1 schematically depicts a machine 11 with an attachment 12 mounted on it. The machine 11 can be, for example, an earthmoving machine, in particular a hydraulic excavator, wheel loader, or the like. Other alternative machines can also be used. The attachment 12 is connected to a coupling 14 on a stick 15 of the machine 11 via a connection device 17. This coupling 14 can be on a rotator or a tiltrotator. Such a rotator or tiltrotator can have a hydraulic rotary union that serves to control the attachment 12. Advantageously, a rotator or tiltrotator facilitates the emptying of the attachment 12, as it allows emptying in both backhoe and backhoe positions. This allows the kinematics of the machine 11 to be used advantageously for emptying.
[0057] Figure 2 shows a perspective view of the attachment 12. This attachment 12 comprises a suction device 16 and a connection device 17 for the coupling 14. The suction device 16 includes a housing 18, which is designed as a collection container for receiving bulk material. The housing 18 can, for example, be rectangular or box-shaped. A suction inlet 22 is provided on an end face 21 of the housing 18, opening into the housing 18. The suction inlet 22 includes a connection point 25 for the detachable and / or rotatable attachment of the suction nozzle 24. This connection point 25 also allows for the connection of different versions of the suction nozzle 24. For example, such a suction nozzle 24 can have a tool at its free end for loosening bulk material or excavated material.It may also be provided that the suction nozzle 24 includes a water lance in order to, for example, cut off the bulk material or excavated material in front of the suction nozzle 24 by means of a flushing action. It may also be provided that a suction bar can be connected to the connection point 25 instead of the suction nozzle 24, so that, for example, a sweeping function can be performed.
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[0060] The connection point 25 can be designed, in particular, by means of a quick-release fastener. Likewise, reducers for different suction nozzle widths or pipe diameters can be provided there.
[0061] The connection point 25 can further have an inlet or outlet port, which is fitted with a closure. For example, a water connection can be attached to the inlet or outlet port to moisten the medium to be extracted. Alternatively, this inlet or outlet port can also serve as a vent for the suction hose 24 when the closure is opened or for introducing ambient air.
[0062] The attachment 12 is designed to generate a suction flow for vacuuming up particles, particularly in the form of bulk materials, excavated materials, liquids, wastewater, or the like. This attachment 12 can be used as a dry vacuum, damp vacuum, or wet vacuum, and can also be used for applications such as cleaning shafts.
[0063] The housing 16 of the extraction device 16 has a discharge flap 26 along one longitudinal side of the housing 16. This discharge flap 26 is preferably pivotally connected to a top surface 19 of the housing 18. An actuator 27 can move the discharge flap 26 into a closed position or an open position 28, as shown, for example, in Figure 2. The actuator 27 is, for example, a hydraulically actuated hydraulic cylinder. The housing 16 has a circumferential seal 31 at an opening edge facing the discharge flap 26. This allows the opening in the side wall of the housing 16 to be closed airtight and watertight by the discharge flap 26. Due to the intended position of the discharge flap 26, several housing chambers 41, 42, 43 can advantageously be emptied simultaneously.
[0064] A suction blower 33 is arranged on the upper surface 19 of the housing 18, remote from the suction inlet 22. This suction blower 33 generates a suction flow, causing the bulk material or the like to enter the interior of the housing 18 via the suction nozzle 24, and the suction plate to be guided out of the housing 18 through the suction blower 33.
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[0067] Preferably, a filter device 34 is provided downstream of the suction blower 33. This filter device 34 can also include a sound attenuation device 35, so that low noise emissions are achieved during operation of the attachment 12. Alternatively, the noise emission is reduced solely by the filter device 34. Furthermore, the sound is advantageously emitted mainly upwards, thus reducing the impact of the resulting sound pressure on people standing nearby.
[0068] The suction inlet 22 is preferably positioned on the end face 21 of the housing 18, particularly adjacent to the top surface 19 of the housing 18. Specifically, the suction inlet 22 is arranged centrally to the plane of symmetry of the housing 18. A suction outlet 23, located below the suction fan 33, lies in the top surface 19 of the housing 18 and outside the plane of symmetry of the housing 18. This ensures the longest possible flow path for the suction gap within the housing 18. Preferably, the connection device 17 is arranged and aligned centrally to the housing 18, particularly on a concentric axis with the housing 18 or on an axis through the center of gravity of the housing 18, so that a uniform load is distributed on the rotator or tiltrotator during operation of the attachment 12.
[0069] Figure 3 shows a schematic side view of a first embodiment of the housing 18 of the extraction device 16 with the discharge flap 26 removed. The suction inlet 22 directs the suction flow into a first housing chamber 41. This first housing chamber is associated with the suction inlet 22. Inside the housing 18, at least one further housing chamber 43 is provided. This further housing chamber 43 is associated with the suction outlet 23. Thus, according to this embodiment, the interior of the housing 18 is divided into two housing chambers 41 and 43. The first housing chamber 41 is many times larger than the further housing chamber 43.
[0070] The further housing chamber 43 comprises a baffle plate 46 and a housing wall 47. The baffle plate 46 and the housing wall 47 are joined together
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[0073] The baffle plate 26 and the housing wall 47 preferably extend between a fixed longitudinal side of the housing 18 and the discharge flap 26. This further housing chamber 43 also has an inlet opening 52. In this first embodiment of the further housing chamber 43, the baffle plate 46 is connected to the top surface 19 of the housing 18. The baffle plate 46 is inclined relative to the top surface 19 of the housing 18. The housing wall 47 can, for example, extend parallel to the top surface 19 of the housing 18 towards an end face 29 of the housing 18, which is opposite the suction inlet 22. The inlet opening 52 is positioned between the housing wall 47 and the end face 49 of the housing 18.
[0074] This embodiment has the advantage that a suction flow, guided along the top 19 of the housing 18, is deflected by the baffle plate 46 towards the bottom 20 of the housing 18. If bulk material is carried along by the suction flow as far as the baffle plate 46 and is dislodged from the deflected airflow by the inertia of the particles, it is deflected downwards. On the way from the suction inlet 22 to the baffle plate 46, coarser particles can already be dislodged from the suction flow due to gravity and collected on the bottom 20 of the housing 18. The suction flow entering the first housing chamber 41 is transferred via the inlet opening 48 into the further housing chamber 43, in this case the second housing chamber. Subsequently, the suction flow is discharged from the housing 18 through the suction blower 33.Due to the deflection of the suction flow away from the suction inlet 22, particularly upwards relative to the base 20, a large proportion of the particles carried in the suction flow can be separated from it. The connection of the baffle plate 46 directly to the top 19 of the housing 18 prevents the suction flow from passing directly from the suction inlet 22 to the suction outlet 23.
[0075] Additionally, at least one flow deflector 51 may be provided in the first housing chamber 41. This flow deflector 51 is preferably provided on a top surface 19 of the housing 18 and projects into the interior of the housing. The flow deflector
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[0078] Analogous to the baffle plate 46, 51 can also have a baffle surface which is inclined relative to the direction of flow of the suction stream and either blocks the path of the suction stream or deflects it downwards towards the bottom 20 of the housing 16. For example, two or more flow deflectors 51 arranged at a distance from each other can be provided.
[0079] Figure 4 shows a schematic side view of an alternative embodiment of the extraction device 16 compared to Figure 3. In this embodiment, the housing 18 also includes a further housing chamber 42, here a second housing chamber. This divides the housing 18 into a first housing chamber 41 and a second housing chamber 42. In this embodiment as well, the first housing chamber 41 has a significantly larger volume than the second housing chamber 42. The second housing chamber 42 is again associated with the suction outlet 23. This second housing chamber 42 also has a baffle plate 46, a housing wall 47, and an inlet opening 48. The difference in this second housing chamber 42 is that the inlet opening 48 is provided between the baffle plate 46 on a top surface 19 of the housing 18. The housing wall 47 extends from the baffle plate 46 to the end face 49 of the housing 18.The baffle plate 46 is preferably aligned towards the center of the housing 18, in particular with respect to the overall length of the housing 18.
[0080] In this embodiment, for example, a flow deflector 51 can be positioned upstream of the inlet opening 48, viewed in the direction of the suction flow. The flow deflector 51 extends from the top of the housing 18 into the interior of the housing 18 or the housing chamber 41, 42, or 43. Alternatively, a flow deflector 51 can be located downstream of the inlet opening 48, viewed in the direction of the suction flow. In both cases, it is ensured that the suction flow does not pass undisturbed from the suction inlet 22 directly into the suction outlet 23. Preferably, a flow deflector 51 is provided both upstream and downstream of the inlet opening 48, as shown in Figure 4. This results in a portion of the suction flow initially being deflected at least by the first flow deflector 51.
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[0083] The suction flow is deflected slightly downwards. Subsequently, a further portion of the suction flow, reduced by particles, passes through the inlet opening 48 and immediately afterwards through the further flow deflector 51 back downwards into the second housing chamber 42, before being deflected once more by the flow deflector 51 before the suction flow is discharged from the housing 18 by the suction blower 43. Preferably, the flow deflector 51, positioned in front of the inlet opening 48 of the second chamber 42, has a height that corresponds to the opening width of the inlet opening 48, i.e., the distance between the top surface 19 of the housing 18 and the beginning of the baffle plate 46. This prevents the suction flow from directly entering the second housing chamber 42, but allows for even higher suction flow velocities.
[0084] Figure 5 shows a schematic side view of another embodiment of the extraction device 16 shown in Figure 3. In this embodiment, both the housing chamber 43 according to Figure 3 and the housing chamber 42 according to Figure 4 are provided. For the design of the housing chamber 43, reference is made to the description in Figure 3, and for the housing chamber 42, reference is made to Figure 4. It follows that inside the housing 18, a first housing chamber 41, a second housing chamber 42 with the inlet opening 48, and a third housing chamber 43 with the inlet opening 52 are formed. The suction flow, which is guided into the housing 18 through the suction inlet 22, thus flows through the first housing chamber 41, the second housing chamber 42, and the third housing chamber 43 before the cleaned suction flow is conveyed out of the housing 18 via the suction blower 33.This arrangement and nesting of the first housing chamber 41, the second housing chamber 42, and the third housing chamber 43 forms a siphon-like flow path for the suction air. This allows, for example, coarse particles from the suction stream to be fractionated in the first housing chamber 41. Medium particles can be fractionated in the second housing chamber 42. Further, especially fine, particles can be fractionated in the third housing chamber 43, so that, if necessary, dust can also be removed.
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[0087] In the case of dry extraction, or in the case of wet extraction, small liquid particles enter the suction flow through the suction blower 33 into the filter device 34.
[0088] Preferably, the flow deflectors 51 can be provided as shown in Figure 5. One flow deflector 51 is positioned in the first housing chamber 41 and, viewed in the flow direction, upstream of the inlet opening 48 of the second housing chamber 42. The other flow deflector 51 is positioned in the second housing chamber 42 and upstream of the third housing chamber 43. Additionally, a further flow deflector 51 could be provided upstream and / or downstream of the inlet opening 48 of the third housing chamber 43, viewed in the flow direction.
[0089] Sealing elements can be provided on the end faces of the baffle plate 46 and the housing wall 47 that point towards the discharge flap 26, which seal the respective housing chamber 42, 43 when the discharge flap 26 is closed.
[0090] After opening the discharge flap 26, all housing chambers 41, 42, 43 provided in the housing 18 can be emptied simultaneously if the housing 18 is tilted accordingly.
[0091] In the embodiments of the suction device 16 described above, it may additionally be provided that a grid or a net is provided in the suction outlet 23 in order to catch, for example, leaves or the like, so that they do not enter the suction blower 33.
[0092] Figure 6 shows a perspective side view of an alternative embodiment of the attachment 12. Figure 7 shows a perspective top view of the alternative embodiment according to Figure 6 with an open discharge flap 26.
[0093] In this embodiment, full reference can be made to the description of the preceding embodiments according to Figures 1 to 5.
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[0096] Receptacles 55 or pockets can be provided on the underside of the housing 18, which serve to hold the tines of a forklift, so that this work machine 11 can be easily transported after being detached from another work machine 11. These receptacles 55 also serve as feet, so that the underside of the housing 18 is positioned at a distance from the ground.
[0097] An enclosure 56 is provided on the upper surface 19 of the housing 18 of the extraction device 16. This enclosure 56 is positioned on the upper surface 19 of the housing 18. Preferably, the enclosure 56 surrounds the suction fan 33, the filter assembly 34, the sound attenuation device 35, and / or the actuator 27 for opening and closing the discharge flap 26. With regard to the actuator 27, it should be noted that the enclosure 56 has openings in the end wall section 57 facing the discharge flap 26, through which the actuator 27 protrudes from the enclosure 56 to engage the discharge flap 26 for opening and closing.
[0098] The enclosure 56 can be designed in multiple parts, allowing individual wall sections of the enclosure 56 to be removed to provide access to the components underneath. These individual wall sections can form part of the top of the enclosure 56, as well as side wall sections.
[0099] The coupling point or connection device 17 is preferably provided on the outside or top side of the housing 56. It is aligned centrally with the housing 56, in particular with the casing 18. The central arrangement of the connection device 17 prevents uneven loading of the rotator or tiltrotator, allowing this attachment 12 to be transported horizontally on a stick 15 of the machine 11.
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Claims
MM 60178 Page 17 of 23 Claims 1. Attachment for a working machine (11), in particular an excavator, with a suction device (16) for separating particles from a suction stream, with a housing (18) for receiving the particles, with a suction inlet (22) provided on the housing (18) for connecting a suction tool (24) and a suction outlet (23) provided on the housing (18) for connecting a suction blower (33) which generates the suction flow, wherein a suction flow path is formed from the suction inlet (22) through the housing (18) to the suction outlet (23), with a first housing chamber (41) arranged in the housing (18) into which the suction inlet (22) opens and at least one second housing chamber (42, 43) arranged in the housing (18) which is downstream of the first housing chamber (41) with respect to the suction flow path, with at least one discharge flap (26) which closes an opening in the housing (18) for the discharge of the collected bulk material, characterized by that the first housing chamber (41) and the second housing chamber (42, 43) are separated by a baffle plate (46) and connected by at least one inlet opening (48, 52).
2. Attachment according to claim 1, characterized in that the suction inlet (22) is provided on an end face (21) of the housing (18), in particular close to a top side (19) of the housing (18) or adjacent to the top side (19) of the housing (18), and MM 60178p0.docxMM 60178 Page 18 of 23 the suction outlet (23) is located away from the suction inlet (22) and is located on a top side (19) of the housing (18), in particular on an end face (29) of the housing (18) opposite the suction inlet (22), or is provided on the end face (29) opposite the suction inlet (22).
3. Attachment according to claim 1 or 2, characterized in that the at least one further housing chamber (42, 43) is arranged remotely from the suction inlet (22) and is associated with the suction outlet (23).
4. Attachment according to one of the preceding claims, characterized in that the second housing chamber (43) comprises a baffle plate (46) and at least one housing wall (47), wherein the baffle plate (46) adjoins a top surface (19) of the housing (18) and the inlet opening (48) is formed at an end of the housing wall (47) opposite the baffle plate (46), and preferably, viewed in the direction of flow, the baffle plate (46) is positioned in front of the suction outlet (23).
5. Attachment according to one of claims 1 to 3, characterized in that the second housing chamber (42) comprises a baffle plate (46) and at least one housing wall (47), wherein the baffle plate (46) is arranged at a distance from the top (19) of the housing (18), so that the inlet opening (48) is formed between the top (19) of the housing (18) and the baffle plate (46) and the housing wall (47) adjoins an end face (29) of the housing (18) opposite the suction inlet (22), and preferably the baffle plate (46) and the inlet opening (48) are positioned in the direction of flow in front of the suction outlet (23).
6. Attachment according to one of the preceding claims, characterized in that the baffle plate (46) of the at least one further housing chamber (42, 43) is located, viewed against the direction of flow of the suction stream, at least in front of the suction outlet (23), in particular by one third to one half of the length of the housing. MM 60178p0.docxMM 60178 Page 19 of 23 (18) is located away from the rear end face (29) of the housing (18).
7. Attachment according to one of the preceding claims, characterized in that at least a first housing chamber (41), a second housing chamber (42) and a third housing chamber (43) are provided in the housing (18), wherein the third housing chamber (43) is arranged in the second housing chamber (42).
8. Attachment according to claim 7, characterized in that, that the second housing chamber (42) comprises a baffle plate (46) and at least one housing wall (47), wherein the baffle plate (46) is arranged at a distance from the top (19) of the housing (18), such that the inlet opening (48) is formed between the top (19) of the housing (18) and the baffle plate (46), and the housing wall (47) abuts an end face (29) of the housing (18) opposite the suction inlet (22), and preferably the baffle plate (46) and the inlet opening (48) are positioned upstream of the suction outlet (23) in the direction of flow, and the third housing chamber (43) comprises a baffle plate (46) and at least one housing wall (47), wherein the baffle plate (46) abuts a top face (19) of the housing (18) and a further inlet opening (52) is located at an end of the housing wall opposite the baffle plate (46). (47) is designed, and preferably, viewed in the direction of flow, the baffle plate (46) is positioned in front of the suction outlet (23), or that the second housing chamber (43) comprises a baffle plate (46) and at least one housing wall (47), wherein the baffle plate (46) connects to a top surface (19) of the housing (18) and the inlet opening (48) is formed at an end of the housing wall (47) opposite the baffle plate (46), and preferably, viewed in the direction of flow, the baffle plate (46) is positioned in front of the suction outlet (23) and MM 60178p0.docxMM 60178 Page 20 of 23 the third housing chamber (42) comprises a baffle plate (46) and at least one housing wall (47), wherein the baffle plate (46) is arranged at a distance from the top (19) of the housing (18), so that the inlet opening (48) is formed between the top (19) of the housing (18) and the baffle plate (46), and the housing wall (47) connects to an end face (29) of the housing (18) opposite the suction inlet (22), and preferably the baffle plate (46) and a further inlet opening (52) are positioned in the direction of flow upstream of the suction outlet (23).
9. Attachment device according to one of the preceding claims, characterized in that, viewed in the direction of flow, at least one flow deflection (51) is provided in front of the at least one further housing chamber (42, 43), in particular on the top (19) of the housing (18) and projecting into the interior of the housing (18).
10. Attachment according to claim 9, characterized in that at least one flow deflection (51) is provided before and / or after an inlet opening (48) of the at least one further housing chamber (42, 43).
11. Attachment according to claim 9 or 10, characterized in that at least one flow deflection (51) is provided before and / or after the baffle plate (46) of the at least one further housing chamber (42, 43).
12. Attachment according to one of the preceding claims, characterized in that the discharge flap (26) is pivotable and forms a side wall for the housing chambers (41, 42, 43) arranged in the housing (18).
13. Attachment according to one of the preceding claims, characterized in that the discharge flap (26) or the housing (18) has a circumferential seal for closing the resulting gap between the opening in a longitudinal side of the housing (18) MM 60178p0.docxMM 60178 Page 21 of 23 as well as the discharge flap (26) and preferably at least one seal for closing the at least one housing chamber (41, 42, 43).
14. Attachment according to one of the preceding claims, characterized in that the housing (18) of the extraction device (16) is rectangular in shape.
15. Attachment according to one of the preceding claims, characterized in that the suction inlet (22) is arranged centrally to a plane of symmetry of the housing (18) on the end face (21) of the housing (18).
16. Attachment according to one of the preceding claims, characterized in that the suction outlet (23) is arranged off-center to a plane of symmetry on the front face (21) and adjacent to the top (19) of the housing (18), in particular far from the discharge flap (26).
17. Attachment according to one of the preceding claims, characterized in that a filter device (34) and / or a sound attenuation device (35) is provided downstream of the suction blower (33) in the direction of flow.
18. Attachment according to one of the preceding claims, characterized in that the extraction device (16) has on the top (19) of the housing (18), preferably centrally, a connection device (17) for connection to the working machine (11) and / or a connection for controlling the suction blower (33) and / or an actuator for the discharge flap (26).
19. Attachment according to one of the preceding claims, characterized in that an enclosure (56) is provided on the upper side (19) of the housing (18), and in particular a connection device (17) is arranged centrally on the upper side of the enclosure (56) and / or at least the suction blower (33), the actuator (27) for the discharge flap (26) are located within the enclosure (56). MM 60178p0.docxMM 60178 Page 22 of 23 the filter device (34) and / or the sound attenuation device (35) is arranged.
20. Attachment according to one of the preceding claims, characterized in that a grid or net, preferably detachable, is arranged in or on the suction outlet (23) in front of the suction blower (33).
21. Attachment according to one of the preceding claims, characterized in that the connection point (25) has a quick-release fastener for attaching various suction tools (23). MM 60178p0.docx