Frame with boom base for mounting a heavy material distribution boom

Abstract

The subject of the present invention is a frame (12) having a boom base (17) on which a heavy-material distribution boom (20) is mounted and a support profile (13) that receives and transmits the force flow generated by the force of the weight of the heavy-material distribution boom (20). The boom base (17) has two tab elements (21, 22) that protrude downwards from the boom base (17) and each have a through-hole (23, 24), the support profile (13) has bolt receiving holes (14) aligned with the through-holes, and bolt elements (15) that connect the boom base (17) to the support profile (13) are guided through the through-holes (23, 24) and the bolt receiving holes (14). The invention further relates to a corresponding thick-material pump equipped with said frame.The bolted connections allow for a reduction in the transportation effort required for construction.

Description

Technical Field

[0001] The present invention relates to a frame to which a boom pedestal for mounting a heavy-duty distribution boom is fixed.

[0002] In order to discharge concrete by a mobile or stationary concrete pump, a heavy-duty distribution boom carried by a frame is usually used. For this purpose, a so-called boom pedestal can be fixed to the frame, and a heavy-duty distribution boom can be mounted on this boom pedestal so as to be rotatable about a vertical axis. The heavy-duty distribution boom can be composed of a plurality of boom segments that are rotatable relative to each other to reach a desired discharge position. The concrete pressurized by the pump device is discharged to a desired position through a concrete delivery line guided along the heavy-duty distribution boom. The above type of frame can also be used for a truck mixer, and in this case, the frame is further designed to carry a mixing drum.

[0003] In particular, in the extended state of the boom segment, a large load torque is generated that must be introduced into the frame via the boom pedestal and dissipated to the surface below the frame. For this purpose, the frame can have, for example, two carrier profiles that are oriented in the longitudinal direction of the frame and serve to transmit the force flow. In the prior art, it is common to weld the boom pedestal to the carrier profile. However, the welding operation required for this is complex. After the welded joint is manufactured, the carrier profile can only be transported together with the boom pedestal fixed thereto, resulting in high transportation costs and making the manufacturing process inflexible.

[0004] The object of the present invention is to provide a frame to which a boom pedestal is fixed for mounting a heavy-duty distribution boom and a mobile heavy-duty pump equipped with the corresponding frame, wherein the frame and the heavy-duty pump at least partially avoid the above-mentioned drawbacks. This object is achieved by the features of the independent claims. Advantageous embodiments are described in the scope of the patent claims.

[0005] The frame according to the present invention comprises a boom base for mounting a thick material distribution boom and a carrier profile that receives and transmits the force flow generated by the weight force of the thick material distribution boom. The boom base has two tab elements projecting downward from the boom base, each tab element having a through hole, and the carrier profile has bolt sockets aligned with the through holes. Bolt elements for connecting the boom base to the carrier profile are guided through the through holes and bolt sockets.

[0006] First, let us define the terms used within the scope of this description. The frame according to the present invention has, for example, at least one, preferably two, carrier profiles that can be oriented parallel to each other. Each of the carrier profiles is preferably assigned two tab elements. For simplicity, in many respects within the scope of this specification, only the configuration of one individual carrier profile interacting with two tab elements will be described. Needless to say, the frame according to the present invention may also have two or more carrier profiles, each having further features described within the scope of this specification. The carrier profiles conventionally have a longitudinal direction through which the flow of forces generated by the thick material distribution boom is directed. This longitudinal direction can coincide with the longitudinal direction of the frame.

[0007] The carrier profile is designed to receive and transmit force flows. In particular, it is specified that a substantial portion of the force flow generated by the thick material distribution boom is transmitted along the carrier profile to a force dissipation region spaced apart from the boom base. The force dissipation region can be located at one end of the carrier profile in the longitudinal direction. The force dissipation region contains a support system, which is connected to the carrier profile and designed to introduce the forces transmitted by the carrier profile to the underside. This frame is different from a support structure, in which the force flow from the boom base is introduced directly to a support structure and support legs formed from a support leg box, and the support legs are connected to the support structure and are extendable or swivelable (see, for example, EP 3 369 876 A1). In particular, since the carrier profile, together with the support system connected to it, already assumes the corresponding rear support function, rear support legs are not absolutely necessary in this frame. Since rear support legs occupy a large space during use after being extended or swiveled, the space required by this frame is reduced accordingly. Furthermore, the absence of rear support legs allows for more storage space to be utilized on the load-bearing surface above the frame.

[0008] Within the scope of the present invention, it is recognized that the boom base can be releasably connected to the carrier profile in a safe and flexible manner by bolt connections. It has been shown that sufficient force can be introduced to the carrier profile by tab elements provided on the boom base. This allows for a much more flexible configuration of the frame fabrication according to the present invention. In particular, the connection between the carrier profile and the boom base is very simple, as it does not require complex welding work. The carrier profile can be transported separately and quite flexibly from the boom base, and the boom base can be connected to the carrier profile only at or near the place of use. This can be done in a simple manner, where the boom base is set on the carrier profile, the through-holes of the tab elements are aligned with the corresponding bolt sockets, and the direction of the through-holes of the tab elements corresponds to the direction of the bolt sockets. Subsequently, bolt elements can be inserted into the bolt sockets and the through-holes of the tab elements.

[0009] The tab element can be in the form of a sheet metal part. Preferably, the sheet metal part is oriented substantially parallel to the side surface of the carrier profile. Thus, the transmission of the force flow applied by the thick material distribution boom can be efficiently carried out along the surface of the sheet metal part and within the side surface of the carrier profile oriented substantially parallel thereto.

[0010] In one embodiment, the tab elements are oriented substantially along the longitudinal direction of the carrier profile. This configuration has been shown to be advantageous for force flow transmission because there is no need to change direction to transmit forces along the longitudinal direction of the carrier profile.

[0011] The tab elements can engage transversely around the carrier profile. In this configuration, the carrier profile is placed between the tab elements, and as a result, a force distribution that is symmetric with respect to the longitudinal axis can be achieved with respect to the carrier profile.

[0012] The carrier profile may also be in the form of a hollow profile having a first sidewall and a second sidewall. Preferably, one tab element is oriented substantially parallel to the first sidewall, and more preferably, the other tab element is oriented parallel to the second sidewall of the hollow profile. When the carrier profile is in the form of a hollow profile, the force applied by the thick material distribution boom is introduced particularly effectively to the sidewalls of the hollow profile and can be transmitted through the sidewalls.

[0013] The tab elements can be connected to the boom base by joint connections. In particular, the joint connections can be designed as welded joints. Since welding is conventionally required in all cases during the fabrication of the boom base, the additional fabrication of the welded joint between the tab elements and the boom base constitutes only a small additional cost.

[0014] The boom base may have at least one side portion, and at least a portion of the joint connection may extend along the side portion. In addition, the boom base may have a base surface portion, and at least a portion of the joint connection may extend along the base surface portion. The side portion and / or base surface portion may be flat. The above features reduce manufacturing costs and also improve the stability of the connection and suitability for transmitting large force flows. The boom base may be formed, for example, from a plurality of bent or joined sheet metal parts, and the side portion and / or base surface portion may be formed from one of the sheet metal parts.

[0015] In one embodiment, a cylindrical sleeve is inserted into the bolt socket, with the inner surface of the cylindrical sleeve corresponding to the outer surface of the bolt element. The stability of the bolt connection can be significantly increased by the cylindrical sleeve. The cylindrical sleeve can be connected to and fixed to the carrier profile by a joint connection. In particular, the cylindrical sleeve can be welded to the carrier profile.

[0016] The cylindrical sleeve may further have end collars designed to project outward from the cylinder surface and abut against the inner or outer surface of the carrier profile. Such collars allow for the determination of a defined position of the cylindrical sleeve relative to the carrier profile along its axial direction. Furthermore, when the cylindrical sleeve is welded to the carrier profile, the collars can function as a weld pool retainer. In addition, the cylindrical sleeve may have portions that project beyond the carrier profile in the axial direction of the bolt socket. This facilitates the production of stable welded joints.

[0017] The carrier profile preferably has at least two profile plates, each of which is bent along at least one bending axis and assembled along at least two connecting lines to form a hollow profile, preferably the connecting lines and / or bending axes are oriented parallel to the longitudinal direction of the carrier profile.

[0018] Bent profile sheets are recognized as enabling the production of cost-effective carrier profiles that are reliable and flexible in use. In particular, it has been shown that assembling profile sheets along two connection lines, for example, that can be screwed or welded to each other, results in stable, low-distortion carrier profiles. Furthermore, the cross-sectional shape of the carrier profile can be adapted considerably more easily by appropriate selection of the bending axis and bending angle compared to conventionally known rectangular tube frames, whose shape is predetermined by the extrusion process.

[0019] Furthermore, as is known from the prior art, in the case of rectangular tube frames manufactured by an extrusion process, the retrospective fabrication of fastening openings (especially provided bolt receptacles, etc.) is extremely complex. In contrast, a profile plate can have a desired number of openings (e.g., bolt receptacles, fastening openings, and / or access openings) before it is assembled to form a hollow profile, preferably before the profile plate is bent. The profile plate is bent and assembled to form a hollow profile only in the next step. Access openings can be provided adjacent to bolt receptacles.

[0020] The carrier profile may have at least one first force absorption region for absorbing the flow of force applied by the thick material distribution boom, and the boom base is connected to the first force absorption region of the carrier profile by tab elements. In addition, the frame may have a second force absorption region positioned at a distance from the first force absorption region in the longitudinal direction of the carrier profile and provided for absorbing the flow of force applied by the thick material distribution boom, and the boom base is connected to the second force absorption region of the carrier profile by transverse carriers. The connection is preferably made by bolt connections. In this configuration, the flow of force applied by the thick material distribution boom can be divided into two force absorption regions.

[0021] Furthermore, the carrier profile may have a force dissipation region, which is spaced longitudinally from the force bolt sockets of the carrier profile and is provided to dissipate the flow of force to the lower surface. The frame also has a support system, which is connected to the carrier profile within the force dissipation region and is designed to introduce the force transmitted by the carrier profile (13) to the lower surface.

[0022] The present invention further relates to a mobile thick material pump having a frame according to the present invention, a thick material pump device mounted on the frame, and a thick material distribution boom connected to the boom pedestal. The mobile thick material pump can be developed by further features described in relation to the frame according to the present invention.

[0023] Further advantages and embodiments of the present invention are apparent from the dependent claims, the description and the accompanying drawings.

[0024] It is needless to say that the above features and the features described below can be used not only in the combinations described, but also in other combinations or alone without departing from the scope of the present invention.

Brief Description of the Drawings

[0025] The present invention is shown in the drawings based on exemplary embodiments and will be described in detail below with reference to the drawings. [Figure 1] FIG. 1 shows a mobile thick material pump according to the present invention in a partially schematic three-dimensional view. [Figure 2] FIG. 2 shows a three-dimensional rear view of the frame of FIG. 1 as seen obliquely from above. [Figure 3] FIG. 3 shows a three-dimensional rear view of the frame of FIG. 1 as seen obliquely from below. [Figure 4] FIG. 4 shows a three-dimensional front view of the frame of FIG. 1 as seen obliquely from below. [Figure 5] FIG. 5 shows an enlarged detail of FIG. 3. [Figure 6] FIG. 6 shows an exploded view of a part of the frame of FIG. 1. [Figure 7] FIG. 7 shows an enlarged view of the boom pedestal of FIG. 6. [Figure 8] FIG. 8 shows an enlarged view of the carrier profile shown in FIG. 6. [Figure 9] FIG. 9 shows a three-dimensional enlarged side view of a part of the carrier profile of FIG. 8. [[ID=4I3]] [Figure 10] FIG. 10 shows a cross-sectional view of the carrier profile of FIG. 9. [[ID=I46]] [Figure 11] Figure 11 shows another cross-sectional view of the carrier profile in Figure 9, along a different cross-section in which the cylindrical sleeve is inserted.

[0026] Detailed explanation

[0027] Figure 1 shows a three-dimensional side view of a movable thick-body pump 9 according to the present invention, comprising a motor-driven chassis 10, an operator's cab 11, and a frame 12 according to the present invention. The frame 12 is set and fixedly connected to the chassis 10. The frame 12 has two carrier profiles 13 extending in the longitudinal direction of the frame, although only one is visible in Figure 1.

[0028] In the forward region of the frame 12, there is a boom base 17 fixedly connected to the carrier profile 13 when viewed from the longitudinal direction (see also Figures 2 and 3). In the upper region of the boom base 17, there is a rotary bearing 19 on which a deployable thick material distribution boom 20 is mounted so as to be rotatable about a vertical axis. In Figure 1, the thick material distribution boom 20 is in a folded state and is placed on the central region that extends longitudinally along the loading surface of the movable thick material pump on two boom attachment bases 25, 26 (see also Figure 2).

[0029] The rear region of frame 12 contains a thick material feed container 27 and a thick material pump device (not shown) located beneath it. The thick material pressurized by the thick material pump device is transported via pipeline 28, and further pipelines are guided along the thick material distribution boom 20, thus allowing it to be discharged to the desired location. Furthermore, the rear end of frame 12 has a force dissipation region where a support system 29 is located.

[0030] A substantial portion of the force flow generated by the thick material distribution boom 20 is directed to the support system 29 via the carrier profile 13, where it is dissipated into the ground. Furthermore, the boom base 17 is connected at the front end of the frame 12 to support the leg 30, which similarly absorbs a portion of the force flow and dissipates it into the ground.

[0031] Figures 2-4 show the frame 12 of Figure 1 in three dimensions. Figure 5 shows a magnified view of the details indicated by circle A in Figure 4. For clarity, the chassis, cab, and thick material distribution boom are omitted in these figures. As can be seen from these figures, the boom base 17 is first connected to the carrier profile 13 via the transverse carrier 31. Furthermore, the boom base 17 rests on the transverse carrier 13 in its forward region and is connected to the carrier profile 13 by bolted connections. In particular, Figures 3-5 show a tab 21, which is located on the left side of the carrier profile 13 in the direction of travel and is part of the bolted connections. The configuration of the bolted connections will be described in detail in relation to Figures 6-8.

[0032] Figure 6 shows an exploded view of the components of the frame 12 in Figure 1. In particular, the boom base 17 and the two profile carriers 13 are shown in this figure. Figures 7 and 8 show enlarged views of parts of the boom base 17 and the carrier profile 13, respectively. From these figures, it can be seen that, when viewed in the direction of travel, there is an additional tab 22 on the right side of the carrier profile 13. The tabs 21 and 22 are formed from sheet metal parts welded along the connection line between the side portion 16 of the boom base 17 and partly the base surface portion 18 of the boom base 17. The tabs 21 and 22 are oriented approximately parallel to the side walls of the carrier profile 13. In addition, the tabs 21 and 22 are positioned apart from each other by a distance corresponding to the cross-sectional width of the carrier profile 13. Thus, when the boom base 17 is placed on it, the tabs 21 and 22 surround the carrier profile 13 between them, so that the tabs 21 and 22 are positioned adjacent to the side walls.

[0033] Tab 21 has a front through hole 23 and a rear through hole 23. Tab 22 similarly has a front through hole 24 and a rear through hole 24. The through holes 23 and 24 of adjacent tabs 21 and 22 are aligned with each other. When the boom base 17 is set on the carrier profile 13, the through holes 23 and 24 are also aligned with bolt receptacles 14 extending through the carrier profile 13. After the boom base 17 is set on the carrier profile 13, the bolt element 15 can be guided accordingly through the through hole 23 of the left tab 21, through the bolt receptacles 14, and through the through hole 24 of the right tab 22. A cylindrical sleeve for receiving the bolt element is inserted into the bolt receptacles 14. This is described in detail with reference to Figures 9 and 10.

[0034] Figure 9 shows a three-dimensional enlarged side view of a portion of the carrier profile 13 used in the embodiment of Figure 1. Figure 10 shows a cross-sectional view of the carrier profile of Figure 9. From the figures of Figures 9 and 10, it can be seen that the carrier profile 13 includes two profile plates 40, 41 assembled to form a hollow profile by welding them together along two connection lines 42, 43. This produces a hollow profile with a cross-sectional width 44 of approximately 20 cm and a cross-sectional height 45 of approximately 40 cm. Profile plate 41 has a projection of approximately 2 cm that extends beyond the connection lines 42, 43 and is not counted in the cross-sectional width 44 or cross-sectional height 45.

[0035] The profile plate 40 is bent approximately 90° around the bending axis 47 so that the profile plate 40 has two portions 40a and 40b separated from each other by the bending axis 47 and at an angle of 90° to each other. The profile plate 41 is bent approximately 45° around the two bending axes 46 and 51 so that it has three partial portions 41a, 41b and 41c separated from each other by the bending axes 46 and 51. The partial portions 40a and 41a are the side walls of the carrier profile 13 in the sense of this specification.

[0036] The portions 41a and 41c placed on the edge of the profile plate 41 and the portions 40a and 40b of the profile plate 40 are at an angle of approximately 90° to each other. In addition, the connecting lines 42 and 43 are diagonally opposite each other within a virtual rectangle formed by the cross-sectional width 44 and the cross-sectional height 45.

[0037] When the aforementioned protrusions are used, it has been shown that a highly reliable and stable welded joint can be manufactured using profile plates perpendicular to each other. In addition, distortion of the components caused by heat during welding can be virtually completely avoided due to the symmetrical arrangement of the connection lines, and therefore retrospective straightening of the carrier profile 13 is not necessary.

[0038] The partial portion 41c of the profile plate 41 is a partial portion that forms the bottom surface of the carrier profile 13 and has a width smaller than the maximum cross-sectional width 44 of the carrier profile 13. This reduces the structural space occupied by the carrier profile 13 in the lower region. When bending axes 46 and 51 are selected, the cross-section of the carrier profile increases from the bottom to the top until it reaches the level of the overall maximum cross-sectional width 44 along with the bending axis 46. This increase in cross-section allows for better use of the structural space in the upper region of the carrier profile 13 (this structural space is often not dimensioned very concisely), and thus increases the stability of the carrier profile 13.

[0039] The above embodiment of the profile plate 41 having three incomplete portions 41a, 41b, and 41c at certain angles to each other allows for clearance in the lower region for, for example, chassis components (such as protruding spring brackets) or wing holders, despite the large cross-section in the upper region of the carrier profile 13a, and ensures good accessibility during inspection. Furthermore, the inclined partial portion 41b, which has an angle of approximately 45° with respect to portions 41a and 41c, allows for a harmonious flow of forces with respect to cross-sectional values ​​(moment of inertia, bending moment, torsional moment, shear flow) while maximizing the use of structural space, compared to other notches (e.g., notches with an angle of 90°).

[0040] In addition, Figure 9 shows a bolt socket 14, which has already been described in relation to Figure 6, located within the profile plate 41 and aligned with the through holes 23, 24 of the tab elements 21, 22 when the boom base 17 is connected to the profile carrier 13. The bolt socket 14 can also be seen in Figure 11, which shows further cross-sectional views of the carrier profile 13 along different cross-sections. As shown in Figures 9 and 10, a cylindrical sleeve 32 is inserted into the bolt socket 14. An access opening 48 is located next to the bolt socket 14. The cylindrical sleeve 32 has a portion 33 that protrudes beyond the side walls 40a, 41a along its axial direction (shown by the dashed line 56 in Figure 11) and connects to the respective side walls 40a, 41a along a welded seam 55. In addition, the cylindrical sleeve 32 has a collar 49 that protrudes outward from the cylinder surface and faces the inner surfaces of the side walls 40a, 41a. The position of the cylindrical sleeve 32 along the axial direction 56 is determined by the collar 49. Furthermore, the collar 49 functions as a welding pool retainer, which is particularly evident in Figure 11.

[0041] In addition, the cylindrical sleeve 32 has an inner surface that corresponds to the outer surface of the bolt element 15. When the bolt element 15 is guided through the bolt socket 14, the outer surface of the bolt element 15 therefore comes into firm contact with the inner surface of the cylindrical sleeve 32. This stably holds the bolt 15 within the cylindrical sleeve. Thus, the tab elements 21 and 22 are stably fixed in relation to the profile carrier 13 in the connected state.

Claims

1. A frame (12) having a boom base (17) to which a thick material distribution boom (20) is attached, and a carrier profile (13) that receives and transmits the flow of force generated by the weight of the thick material distribution boom (20), The boom base (17) has two tab elements (21, 22) that protrude downward from the boom base (17), each having through holes (23, 24), and the carrier profile (13) has bolt sockets (14) aligned with the through holes, and bolt elements (15) that connect the boom base (17) to the carrier profile (13) are guided through the through holes (23, 24) and the bolt sockets (14). The tab elements (21, 22) are in the form of sheet metal parts oriented parallel to the side surface of the carrier profile (13), forming a frame (12).

2. The frame (12) according to claim 1, wherein the tab elements (21, 22) are oriented along the longitudinal direction of the carrier profile (13).

3. The frame (12) according to any one of claims 1 to 2, wherein the tab elements (21, 22) engage transversely around the carrier profile (13).

4. The frame (12) according to any one of claims 1 to 3, wherein the carrier profile (13) is in the form of a hollow profile, and one of the tab elements (21) is oriented parallel to the first side wall (41a) of the hollow profile.

5. The frame (12) according to claim 1, wherein the other of the tab element (22) is oriented parallel to the second side wall (40a) of the hollow profile.

6. The frame (12) according to any one of claims 1 to 5, wherein the tab elements (21, 22) are connected to the boom base (17) by a joint connection.

7. The frame (12) according to claim 5 or 6, wherein the boom base (17) has at least one side portion (16), and at least a portion of the joint connection extends along the side portion (16).

8. The frame (12) according to any one of claims 5 to 7, wherein the boom base (17) has a base surface portion (18), and at least a part of the joint connection portion extends along the base surface portion (18).

9. The frame (12) according to any one of claims 1 to 8, wherein a cylindrical sleeve (32) having an inner surface corresponding to the outer surface of the bolt element (15) is inserted into the bolt socket (14).

10. The frame (12) according to claim 9, wherein the cylindrical sleeve (32) is connected to and fixed to the carrier profile (13) by a joint connection.

11. The frame (12) according to claim 9 or 10, wherein the cylindrical sleeve (32) has an end collar (49) that protrudes outward from the surface of the cylinder and is designed to abut against the inner surface of the side walls (40a, 41a) of the carrier profile (13).

12. The frame (12) according to any one of claims 1 to 11, wherein the carrier profile (13) comprises at least two profile plates (40, 41), each of which is bent along at least one bending axis (46, 47, 51) and assembled along at least two connecting lines (42, 43) to form a hollow profile.

13. The frame (12) according to claim 12, wherein the connecting lines (42, 43) and / or the bending axes (46, 47, 51) are oriented parallel to the longitudinal direction of the carrier profile (13).

14. The frame (12) according to any one of claims 1 to 13, wherein the carrier profile (13) has at least one first force absorption region for absorbing the flow of force applied by the thick material distribution boom (20), the boom base (17) is connected to the first force absorption region of the carrier profile by the tab elements (21, 22), and the frame has a second force absorption region, the second force absorption region is spaced apart from the first force absorption region in the longitudinal direction of the carrier profile (13) and absorbs the flow of force applied by the thick material distribution boom (20), and the boom base is connected to the second force absorption region of the carrier profile (13) via a transverse carrier (31), the connection preferably being made by a bolted connection.

15. The frame (12) according to any one of claims 1 to 14, wherein the carrier profile has a force dissipation region, the force dissipation region is spaced apart from the bolt socket (14) in the longitudinal direction of the carrier profile (13) and is provided to dissipate the flow of force to the lower surface, and the frame has a support system (29), the support system (29) is connected to the carrier profile (13) in the force dissipation region and is designed to introduce the force transmitted by the carrier profile (13) downward to the lower surface.

16. A thick-walled pump comprising a frame (12) according to any one of claims 1 to 15, A heavy material pump comprising a heavy material pumping device mounted on the frame (12) and a heavy material distribution boom (20) connected to the boom base (17).

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