Suction tool for an attachment, and control block for a suction tool

Abstract

The invention relates to a suction tool and to a control block for a suction tool, which can be connected to an attachment (12) of a working machine (11), having a suction nozzle (70) which, at a free end, has a suction nozzle portion (71) with a suction opening (73) on which a working tool (72) can be arranged, having a connection point (25) provided on the suction nozzle (70), the connection point being provided at an end of the suction nozzle (70) opposite the suction opening (73) and being able to be connected to a suction inlet (22) of the housing (18) of the attachment (12), wherein the suction nozzle (70) has a pivoting device (41) which is provided at or near the connection point (25), and the suction nozzle (70) has a rotation device (61) which is arranged between the pivoting device (41) and the suction nozzle section (71).

Description

[0001] Suction tool for an attachment and control block for a suction tool

[0002] The invention relates to a suction tool for an attachment and a control block for controlling such a suction tool.

[0003] From DE 41 38 691 A1, an attachment for a construction machine is known. This attachment is used to collect bulk material from civil engineering or railway construction, or other material from an excavation. This attachment includes a suction motor to transfer the bulk material via a suction nozzle into a housing of the attachment. This suction nozzle includes a connecting section that is pivotably mounted in the housing of the attachment and can be moved up and down by a hydraulic cylinder. An arc-shaped section, held by a coupling, is connected to this connecting section. A suction pipe or hose is attached to the arc-shaped section via another coupling. The connections via the couplings are rigid. To place the attachment on the ground, the connecting section must be pivoted vertically upwards. Nevertheless, a free end of the suction hose is positioned on the ground in a curved arrangement.

[0004] The invention is based on the objective of proposing a suction tool for an attachment that enables easy handling of the attachment and also achieves increased suction power. The invention is further based on the objective of proposing a control block for controlling such a suction tool.

[0005] This task is solved by a suction tool for an attachment, which includes a suction nozzle having a suction opening at one free end, on which a working tool can be arranged, and which has a connection point at one end opposite the suction opening, which can be connected to a suction inlet on a housing of the attachment, wherein the suction nozzle has a swiveling device

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[0008] comprising, which is provided at the connection point and wherein the sucking nozzle has a rotating device which is arranged between the pivoting device of the sucking opening of the sucking nozzle section, by which the sucking nozzle section arranged between the rotating device and the sucking opening is rotatable in its longitudinal axis and wherein a connecting section is provided between the pivoting device and the rotating device.

[0009] This type of suction tool allows the suction nozzle to be moved from a non-use position to a working position via the swivel mechanism. In a working position, the suction nozzle points downwards relative to the attachment, for example, to suction bulk material from the ground or in an excavation. In a non-use position, the suction nozzle can be swivelled laterally so that when the attachment is placed on the ground, the suction nozzle either rests against the ground or is raised off the ground. The rotating control of the suction nozzle section with the rotary mechanism allows the tool to loosen and / or break up the bulk material being suctioned, thus facilitating its removal.

[0010] Preferably, the connecting section is designed as a suction nozzle bend. In particular, a connecting flange for the swiveling device and a connecting flange for the rotating device are fixedly arranged on the connecting section. This allows the rotating device and the swiveling device to control independent swiveling and rotating movements of the suction nozzle section.

[0011] In particular, the arc-shaped connecting section extends over an angular range of 70 degrees to 110 degrees or at an angle of 90 degrees. Preferably, a rotation axis of the swiveling device and a rotation axis of the rotary device are aligned approximately at 90 degrees or at a right angle to each other.

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[0014] The swiveling device preferably comprises a connection nozzle with a first and second connection flange, wherein the first connection flange is non-rotatable and the connection point is non-rotatable on the attachment, allowing the rotary device to pivot about the axis of rotation of the swiveling device. Preferably, the connection point on the housing of the attachment is vertically oriented, so that this connection nozzle can be horizontally oriented and connected to the suction inlet of the housing of the attachment. The rotary device and the suction nozzle section arranged thereon can thus pivot about a horizontal axis.

[0015] Furthermore, it may be provided that the swiveling device and / or the rotating device can each be controlled by a drive. Advantageously, a hydraulic drive is provided. This allows, for example, a hydraulic drive for a suction blower on the implement to also be used to control the swiveling device and / or the rotating device. In particular, it is provided that the hydraulic drive is designed in the form of a hydraulic lifting cylinder.

[0016] Preferably, the swiveling device and / or the rotating device each comprise a lever arrangement that can be controlled by the drive. The length of the lever arm(s) of the lever arrangement can also determine a swiveling range or a rotating range.

[0017] In particular, it can be provided that the pivoting range of the pivoting device and the rotational range of the rotary device are determined by the stroke of the lifting cylinder and / or by at least one lever arm of the lever arrangement. Such a combination of lifting cylinder and lever arrangement represents a simple and robust design.

[0018] The swivel device preferably has a swivel range such that the rotary device can be swivelled at least 45 degrees relative to the longitudinal axis of the suction inlet. In particular, it is provided that this swivel range extends from 60 degrees to 110 degrees. This allows for a

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[0021] Lateral alignment and / or placement of the suction nozzle section is possible when setting the attachment down on the ground.

[0022] The rotary device preferably has a rotation range of less than 60 degrees, within which the suction nozzle section is rotatably controlled about its longitudinal axis. This rotation allows the bulk material to be loosened by the working tool before or simultaneously with suction. In particular, an oscillating rotary movement of the suction nozzle section by the rotary device within the rotation range is provided. For the oscillating rotary movement, the rotation range can also be reduced to 45 degrees or less.

[0023] According to a preferred embodiment, the swiveling device can be moved from a non-use position to a use position, and the rotary device can then be controlled in an oscillating manner. Thus, the swiveling device and the rotary device of the suction tool can be controlled sequentially for the tasks to be performed, namely the extraction of bulk material, moisture, water, or the like. After the tasks have been completed, the rotary device can be stopped, and subsequently, the suction nozzle section can be moved by the swiveling device into the non-use position, that is, the suction nozzle section is moved from a position hanging essentially vertically downwards to a laterally oriented position.

[0024] Preferably, the working tool is arranged interchangeably at the sucking opening of the suckling tube. This allows a suitable working tool to be used depending on the working conditions.

[0025] The problem underlying the invention is further solved by a control block for controlling a suction tool, in particular according to one of the embodiments described above, wherein a flow divider is arranged in a supply line leading to a suction blower of the attachment, which directs a first partial flow to

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[0028] This control block directs the hydraulic flow to the drive of the swivel mechanism and the suction fan of the attachment, and a second partial flow to the drive of the rotary mechanism. This control block allows both the drive of the swivel mechanism and the drive of the rotary mechanism to be controlled within a single hydraulic circuit, with the suction fan of the attachment also being driven via the first partial flow.

[0029] Preferably, the first partial flow comprises a flow volume that is many times larger than the flow volume of the second partial flow. A small volume flow is sufficient to control the rotary device within its rotation range, so that the significantly larger volume flow is available for driving the motor on the attachment, in particular the motor for the suction blower.

[0030] Preferably, a branch is provided between the hydraulically controlled or uncontrolled flow divider and the suction blower of the attachment, so that the pivoting device for transferring the suction tool from the non-use position to the use position is also controlled by means of the flow volume in the first partial flow.

[0031] Furthermore, it may be provided that a branch is provided in a return line for the second partial flow, in particular between the oscillation valve and a supply line downstream of the suction blower of the attachment, which leads into a return line, in order to transfer the swiveling device from the operating position to the non-operating position.

[0032] Preferably, at least the supply line and / or the return line are connected to the control unit via an interface. The control unit, which includes hydraulic components such as control valves, switching valves, check valves, throttle valves, or the like, can control and provide pressures and / or flow volumes of the hydraulic medium.

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[0035] 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:

[0036] Figure 1 shows a schematic view of a machine with an attachment and a suction tool.

[0037] Figure 2 shows a perspective view of the attachment according to Figure 1.

[0038] Figure 3 shows a perspective view of the suction tool in a non-use position.

[0039] Figure 4 shows a perspective view of the suction tool in a working position.

[0040] Figure 5 shows a perspective view of a suction nozzle section in a first working position,

[0041] Figure 6 shows a perspective view of the suction nozzle section according to Figure 5 in a second working position, and

[0042] Figure 7 shows a circuit diagram for a hydraulic control block for controlling the suction tool.

[0043] Figure 1 schematically depicts a working machine 11 with an attachment 12 mounted on it. The working machine 11 can be, for example, an earthmoving machine, in particular a hydraulic excavator, wheel loader, or the like. Other alternative working machines may also be used. The attachment 12 is connected via a connection device 17 to a coupling 14 on a stick 15 of the working machine 11. This coupling 14 can be formed on a rotator or a tiltrotator. Such a rotator or tiltrotator can have a hydraulic rotary union that serves to

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[0046] The attachment 12 is controlled by a rotator or tiltrotator. A rotator or tiltrotator advantageously facilitates the emptying of the attachment 12, as this allows emptying in both digging and backhoe positions. This allows the kinematics of the working machine 11 to be used advantageously for emptying.

[0047] 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 to which the connection point 25 for the detachable and / or rotatable mounting of the suction tool 24 can be attached. This connection also allows for the attachment of different embodiments of a suction tool 24. For example, such a suction tool 24 can have a tool at its free end for loosening bulk material or excavated material.The suction tool 24 may also include a water lance to, for example, cut off the bulk material or excavated material in front of the suction tool 24 by means of a flushing action. Alternatively, a suction bar may be connected to the suction inlet 22 instead of the suction tool 24, enabling, for example, a sweeping function. The connection may be designed, in particular, by means of a quick-release fastener. Reducers for different suction nozzle widths or pipe diameters may also be provided.

[0048] The suction tool 24 can furthermore have a feed or discharge port, which is equipped with a closure. For example, a water connection can be attached to the feed or discharge port to moisten the medium to be extracted. Alternatively, this feed or discharge port can also serve as a vent for the suction tool 24 when the closure is opened or for introducing ambient air.

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[0051] 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.

[0052] The housing 16 of the extraction device 18 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 in the housing 18 can advantageously be emptied simultaneously.

[0053] 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 tool 24, and the suction air to be drawn out of the housing 18 through the suction blower 33. Preferably, a filter device 34 is provided downstream of the suction blower 33. This filter device 34 can also include a sound-dampening device 35, resulting in low noise emissions during operation of the attachment 12. Alternatively, the noise emission can be reduced solely by the filter device 34. Furthermore, the sound is advantageously emitted primarily upwards, thus reducing the impact of the resulting sound pressure on nearby persons.

[0054] The suction inlet 22 is preferably positioned on the end face 21 of the housing 18, in particular adjacent to the top surface 19 of the housing 18. In particular, the suction inlet 22 is centered on the plane of symmetry of the housing 18.

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[0057] The housing 18 is arranged. A suction outlet 23, which is provided below the suction blower 33, lies in the top 19 of the housing 18 and outside the plane of symmetry of the housing 18. This allows, firstly, the longest possible flow path within the housing 18 to be achieved. Secondly, the connection device 17 is preferably arranged and aligned centrally with the housing 18, in particular on a central axis with the housing 18, or on an axis through the center of gravity of the housing 18, so that a uniform load on the rotator or tiltrotator is ensured during handling of the attachment 12.

[0058] Figure 3 shows the suction tool 24 in a non-use position 36, as shown by the dashed lines in Figure 1. Figure 4 shows the suction tool 24 in a use position 37, as also shown in Figures 1 and 2. The suction tool 24 is designed as a single unit with a connection point 25 that can be connected to the attachment 12. In particular, the connection point 25 is connected to the suction inlet 22 on an end face 21 of the housing 18.

[0059] The suction tool 24 comprises a swiveling device 41. A connecting piece 51 is attached to this swiveling device 41, and a rotary device 61 is mounted opposite the swiveling device 41. A suction nozzle section 71 is provided on this rotary device 61, opposite the connecting piece 51. The suction nozzle section 71 has a working tool 72 at its free end. This working tool can be in the form of a crown with cutting edges or the like. The working tool 72 can also be provided on the suction nozzle section 71 in a replaceable manner. The suction nozzle section 71 is preferably designed as a rigid tube section. Alternatively, the suction nozzle section 71 can also be made of a flexible material that is torsionally rigid. Alternatively, the suction nozzle section 71, together with the working tool 72, can be replaceable with respect to the rotary device 61.

[0060] The swivel device 41 comprises a first and a second connection flange 42, 43, with a connection stub 44 provided between them. The connection stub 44 and the first connection flange 42 are

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[0063] The connection 44 is fixedly aligned with the connection point 25. The connection nozzle 44 is preferably formed from a fixed pipe section. The pivoting device 41 comprises a drive 45, which is preferably hydraulic. In particular, a hydraulic cylinder 46 is provided. This drive 45 actuates a lever arrangement 47, which, for example, comprises two lever arms 48, 49. This lever arrangement 47 is connected to the second connection flange 43, so that this second connection flange 43 can pivot about the connection nozzle 44. The connecting section 51 is fixedly arranged on the second connection flange. The connecting section 51 is preferably formed from a fixed pipe section as a suction nozzle bend, preferably as a 90° suction nozzle bend.

[0064] The swivel device 41 has a swivel range which can be determined by a stroke of the lifting cylinder 46 and / or by the design of the lever arms 48, 49 of the lever arrangement 47.

[0065] When the suction nozzle section 71 is positioned in the non-use position 36, the lifting cylinder 46 is retracted (Figure 3). This aligns the suction nozzle section 71 essentially horizontally. In this non-use position 36, at least the suction nozzle section 71 can be aligned approximately parallel or parallel to the top surface 19 of the housing 18.

[0066] The rotary device 61 comprises a first connecting flange 62, which is rigidly connected to the connecting section 51. A nozzle 63 is fixedly arranged on the first connecting flange 62. Opposite this, a second connecting flange 64 is provided, which in turn receives the suction nozzle section 71. An actuator 65 is provided to control a rotary movement of the second connecting flange 64. This actuator 65 is preferably designed as a hydraulic lifting cylinder 66. This lifting cylinder 66, which is fixedly held on the first connecting flange 62, actuates a lever arrangement 67 to control a rotary movement of the second connecting flange 64. The lever arrangement 67 is, for example, designed with only one lever arm 68.

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[0069] The swiveling device 41 and the rotating device 61 can each be designed as modules. These can be held to the connecting section 51 and the suction nozzle section 71, respectively, by detachable connections.

[0070] Starting from Figure 3, where the suction tool 24 is arranged in the non-use position 36, a pivoting movement of the rotary device 61, and thus of the suction nozzle section 71, can be carried out by a lifting movement of the hydraulic cylinder 46, such that the suction tool 24 is arranged in the use position 37 according to Figure 1 or Figure 5. Preferably, a pivoting range of at least 45 degrees, in particular 90 degrees, is provided for the pivoting device 41.

[0071] Figure 5 shows the suction tool 24 with the suction nozzle section 71 in a first working position. Figure 6 shows the suction tool 24 with the suction nozzle section 71 in a second working position. In the first working position, the lifting cylinder 66 is, for example, extended. In the second working position, the lifting cylinder 66 is retracted. This results in the rotation range for the rotary device 61. This rotation range can encompass an angle of less than 60 degrees, in particular less than 45 degrees. Preferably, this rotary device 61 is controlled by oscillation, so that a rotational movement of just a few degrees is sufficient to achieve loosening and / or releasing of the bulk material or suction material by means of the working tool 72.

[0072] Figure 7 shows a control block 81 for controlling the suction tool 24. A hydraulic control unit 82 is provided on the attachment 12. The control unit 82 is connected to a hydraulic control system of the machine 11 via couplings on the attachment 12 and is preferably supplied with hydraulic fluid. The control block 81 is connected to the control unit 82. This control unit 82 supplies a supply line 83, which is pressurized to control the suction blower 33. This supply line 83 leads into a flow divider 85. The flow divider 85 divides the supplied volume flow into a first and a second partial flow. The first partial flow is routed directly to the suction blower via the supply line 86.

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[0075] 33. The second partial flow is supplied via a supply line 88 to an oscillation valve 89. This oscillation valve 89 is connected to the drive 65 of the rotary device 61. On the output side, the oscillation valve 89 is connected to a supply line 91, which leads into a return line 92 coming from the suction blower 33. This return line 92 in turn leads into the control unit 82. The control unit 82 contains control valves and other hydraulic components by which the pressures and / or the flow volume of the hydraulic medium can be controlled, at least in the supply line 92.

[0076] The flow divider 85 is adjustable with respect to the control of the volume flows for the first and second partial flows. Preferably, a smaller volume of flow is provided for the second partial flow, so that a large flow volume is available for the first partial flow. This flow volume is required to control the suction blower 33.

[0077] A branch 94 is provided between the flow divider 85 and the suction blower 33, through which a portion of the first partial flow is routed to the drive 45. A further branch 95 is provided in the supply line 91, which also leads to the drive 45.

[0078] As soon as the attachment 12 is put into operation, high pressure is present at the supply line 83. The first partial flow passes through the flow divider 85 and supply line 86 to the suction blower 33. Simultaneously, the drive 45 is activated via branch 94, so that the suction tool 24 is moved from the non-use position 36 to the use position 37. The second partial flow is supplied to the oscillation valve 89 via supply line 88. At an adjustable control pressure, the oscillation valve 89 reverses the flow direction, so that the lifting cylinder 66 of the drive 65 is alternately extended and retracted, thus controlling the oscillating rotary motion of the suction nozzle section 71.

[0079] As soon as the attachment 12 is taken out of service or shut down, high pressure is applied to the return line 92. Via the branch

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[0082] At position 95, the drive 45 is activated, so that the suction tool 24 is moved from the operating position 37 to the non-operating position 37. The oscillating valve 89 stops the rotary device 61.

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Claims

MM 60186 Page 14 of 19 Claims 1. Suction tool for an attachment (12) that can be connected to a working machine (11), with a sucking prong (70) which has at a free end a sucking prong section (71) with a sucking opening (73) on which a working tool (72) can be arranged, with a connection point (25) provided on the suction nozzle (70), which is provided at one end of the suction nozzle (70) opposite the suction opening (73), which can be connected to a suction inlet (22) of the housing (18) of the attachment (12), characterized by that the suckling proboscis (70) has a swiveling device (41) which is provided at or near the connection point (25), that the suckling proboscis (70) has a rotating device (61) by which the suckling proboscis section (71) is rotatably arranged about its longitudinal axis, and that a connecting section (51) is provided between the swiveling device (41) and the rotating device (61).

2. Suction tool according to claim 1, characterized in that the connecting section (51) is designed as a suction nozzle bend and preferably a connecting flange (43) of the swiveling device (41) and a connecting flange (62) of the rotary device (61) are fixedly arranged on the connecting section (51).

3. Suction tool according to claim 2, characterized in that a rotation axis of the swiveling device (41) and a rotation axis of the rotary device (61) are connected by the connecting section MM 60186pO.DOCXMM 60186 Page 15 of 19 (51) are aligned at an angle to each other, preferably at an angle of 70 degrees to 110 degrees or at an angle of 90 degrees to each other.

4. Suction tool according to one of the preceding claims, characterized in that the swiveling device (41) comprises a connecting nozzle (44) with a first and second connecting flange (43, 43), and the first connecting flange (42) is not rotatably connected to the connection point (25), and the rotary device (61) is pivotable about the axis of rotation of the swiveling device (41).

5. Suction tool according to one of the preceding claims, characterized in that the swiveling device (41) and / or the rotary device (61) can each be controlled by a drive (45; 65), in particular a hydraulic drive, preferably with a lifting cylinder (46; 66).

6. Suction tool according to claim 5, characterized in that the swiveling device (41) and / or the rotary device (61) each comprise a lever arrangement (47; 67) which can be controlled by the drive (45; 65).

7. Suction tool according to claim 5 or 6, characterized in that a stroke of the hydraulic cylinder (44) and / or at least one lever arm (48, 49) of the lever arrangement (47) determines a pivoting range of the pivoting device (41).

8. Suction tool according to one of the preceding claims, characterized in that the swiveling device (41) has a swiveling range of at least 45 degrees, about which the rotary device (61) can be swivelled to the axis of rotation of the swiveling device (41).

9. Suction tool according to claim 5 or 6, characterized in that a stroke of the hydraulic cylinder (64) and / or at least one lever arm (68) of the lever arrangement (67) determines a rotation range of the rotary device (61). MM 60186pO.DOCXMM 60186 Page 16 of 19 10. Suction tool according to one of the preceding claims, characterized in that the rotary device (61) has a rotation range of less than 60 degrees within which the suction nozzle section (71) is rotatably controlled about its longitudinal axis.

11. Suction tool according to one of the preceding claims, characterized in that the pivoting device (41) can be moved from a non-use position (36) to a use position (37) and subsequently the suction nozzle section (71) can be controlled by the rotary device (61) in an oscillating manner.

12. Suction tool according to one of the preceding claims, characterized in that the working tool (72) is interchangeably arranged on the suction opening (73) of the suction nozzle section of the (71).

13. Control block for controlling a suction tool (24) for a working device (12) that can be connected to a working machine (11), in particular according to one of the preceding claims 1 to 12, - wherein the suction tool (24) comprises a suction nozzle (70) with a connection point (25) which can be connected at an end opposite a suction opening (73) of the suction nozzle (70) to a suction inlet (22) of a housing (18) of the attachment (12), - wherein the suckling proboscis (70) has a pivoting device (41) which is provided at or near the connection point (25), - wherein the suckling proboscis (70) has a rotating device (61) by which a suckling proboscis section (71) of the suckling proboscis (70) is rotatably arranged about its longitudinal axis, characterized by MM 60186pO.DOCXMM 60186 Page 17 of 19 - that a supply line (83) leading to a suction blower (33) of the attachment (12) and a return line (92) leading away from the suction blower (33) is provided, that a flow divider (85) is arranged in the supply line (83) leading to the suction blower (33) of the attachment (12), so that a first partial flow can be used to control a drive (45) of the swiveling device (41) and the suction blower (33), and a second partial flow can be used to control a drive (65) for controlling the rotary device (61).

14. Control block according to claim 13, characterized in that the first partial flow comprises a flow volume which is many times higher than the flow volume of the second partial flow.

15. Control block according to claim 13 or 14, characterized in that a supply line (86) for the first partial flow has a branch (94) between the flow divider (85) and the suction blower (33), which is provided for controlling a lifting cylinder (46) from the drive (45) of the swiveling device (41) and preferably moves the suction tool (24) from a non-use position (36) to a use position (37).

16. Control block according to one of claims 13 to 15, characterized in that a supply line (91) for the second partial flow for conveyance to a return line (92) has a branch (95) which is provided for controlling the lifting cylinder (46) of the swivel device (41) and preferably moves the suction tool (24) from a working position (37) to a non-working position (36).

17. Control block according to one of claims 13 to 16, characterized in that the drive (65) of the rotary device (61) can be controlled by an oscillation valve (89). MM 60186pO.DOCXMM 60186 Page 18 of 19 18. Control block according to one of claims 13 to 17, characterized in that the pivoting device (41) and the rotary device (61) can be controlled by a control circuit.

19. Control block according to one of claims 13 to 18, characterized in that at least the supply line (83) and / or the return line (93) are connected to a control unit (82) via an interface. MM 60186pO.DOCX

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