Primary frame for a concrete conveyor vehicle, and concrete conveyor vehicle
Patent Information
- Application Number
- PCT/EP2026/057505
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-24
- Filing Date
- 2026-03-17
- Publication Date
- 2026-10-01
Smart Images
Figure EP2026057505_01102026_PF_FP_ABST
Abstract
Description
[0001] 17.03.2026 / PH
[0002] Main frame for a concrete conveyor vehicle, concrete conveyor vehicle
[0003]
[0001] The invention relates to a main frame for a concrete conveying vehicle. The invention also relates to a concrete conveying vehicle.
[0004]
[0002] Concrete conveying vehicles are used to convey liquid concrete or similar materials, such as bulk materials or viscous substances, along a mast arm of the concrete conveying vehicle, so that the liquid concrete can be discharged at a desired location via a distal end of the mast arm. The mast arm is typically composed of a plurality of mast segments, wherein in an extended state the mast arm extends over a large distance and wherein in a retracted state the mast segments are in a compact state, so that the mast arm lies within the dimensions of the concrete conveying vehicle.
[0005]
[0003] By mounting the mast arm on a vehicle, high mobility is achieved, allowing the machine to be easily used in different locations. Before use, support legs are extended outwards to securely stabilize the concrete conveyor vehicle. This stabilization ensures that the concrete conveyor vehicle remains stable even when the mast arm is extended far to the side.
[0006]
[0004] The concrete conveying vehicle comprises a main frame to which the mast arm and the support legs are attached. When the concrete conveying vehicle is supported by the support legs and the mast arm is extended, considerable mechanical loads are transferred via the main frame. It has proven not entirely easy to design the main frame under the given spatial conditions in such a way that the loads that occur can be reliably absorbed.
[0007]
[0005] The invention is based on the objective of providing a main frame for a concrete conveying vehicle and a concrete conveying vehicle with which the aforementioned disadvantages are reduced. This objective is achieved by the features of the independent claim. Advantageous embodiments are specified in the dependent claims.
[0008]
[0006] According to the invention, a main frame for a concrete pumping vehicle is proposed, wherein the concrete pumping vehicle has two outriggers and a mast arm. The main frame has an upper frame plate, a lower frame plate, a tank, and a pivot bearing for the mast arm. Two upper pivot mounts for the two outriggers are formed on the upper frame plate, and two lower pivot mounts for the two outriggers are formed on the lower frame plate. The pivot bearing is attached to the tank, the tank forming a connection between the upper frame plate and the lower frame plate. The upper frame plate has a central section and two side sections, the side sections having a greater material thickness than the central section. One of the two upper pivot mounts is formed on each of the side sections. The central section is designed as a central plate connecting the two side sections.
[0009]
[0007] The middle section and the side section can be welded together with a weld seam, the weld seam extending along a circumferential section of the side section and along a circumferential section of the middle section, so that the side section and the middle section are butt-welded together by the weld seam. The butt joint can directly abut the area of a side section where the side section has the greater material thickness. It is also possible that the side section has a milled recess in the area of the weld seam, so that the side section has a reduced material thickness there. The reduced material thickness can be greater than the material thickness of the middle section or equal to the material thickness of the middle section. The invention also includes embodiments in which the middle section is produced entirely by milling from a thicker plate.
[0010]
[0008] The middle plate forms a planar connection between the two side parts. The middle plate can form a closed surface, so that the upper frame plate is free of openings. If the middle plate has openings, these preferably occupy less than 50%, more preferably less than 20%, and more preferably less than 10% of the surface area of the middle plate.
[0011]
[0009] The invention recognizes that the forces occurring in a central region of the upper frame plate are significantly smaller than the forces in the peripheral region of the upper frame plate. The invention proposes using a thinner material in the central region of the upper frame plate than in the peripheral region. For this purpose, the upper frame plate is composed of two side parts with a greater material thickness and a central plate with a thinner material thickness. The invention further recognizes that, in an advantageous embodiment, it is beneficial for the force flow within the upper frame plate if the side parts and the central plate are butt-welded together along a circumferential section. In a butt joint, the individual weld seam runs along both a circumferential section of the side part and a circumferential section of the central part.A butt joint is particularly advantageous compared to reinforcing the stressed areas with double layers of sheet metal.
[0012]
[0010] The intermediate plate can be positioned between the first side part and the second side part. A first upper hinge receptacle and a second upper hinge receptacle of the main frame can be formed on the first side part. A third upper hinge receptacle and a fourth upper hinge receptacle of the main frame can be formed on the second side part. The first side part and the second side part can be arranged such that they enclose a longitudinal median plane of the main frame between them.
[0013]
[0011] The longitudinal median plane is defined by the axis of rotation of the pivot bearing and by the longitudinal direction of the main frame. The longitudinal direction corresponds to the direction of movement of a main frame connected to the concrete conveyor vehicle when the concrete conveyor vehicle is traveling straight ahead. "Front" denotes the direction of forward travel, and "rear" is the opposite direction. The vertical direction corresponds to the axis of rotation of the pivot bearing on which the mast arm is mounted relative to the main frame.
[0014]
[0012] The first side panel and the second side panel can be spaced apart from the longitudinal center plane, so that a gap exists between the first side panel and the second side panel. It is also possible for the first side panel and the second side panel to abut each other at the longitudinal center plane. The first side panel and the second side panel are connected to each other via the center panel. The main frame can also be designed such that there is a direct connection between the first side panel and the second side panel. The first side panel and the second side panel can be welded together in the region of the longitudinal center plane. The invention also includes the possibility that the first side panel and the second side panel form a single unit before being connected to the center panel.
[0015]
[0013] The weld seam between the first side part and the middle part can extend over at least 10%, preferably at least 20%, and more preferably at least 30% of the circumference of the middle part. The weld seam between the first side part and the middle part can extend over at least 10%, preferably at least 20%, and more preferably at least 30% of the circumference of the first side part. The second side part can be butt-jointed to the middle part in the same manner as the first side part. The features mentioned for the weld seam between the first side part and the middle part can also be implemented individually or in combination in the weld seam between the second side part and the middle part.
[0016]
[0014] In one embodiment of the invention, the two support legs are two rear support legs, one of which is arranged on the left side and one on the right side of the concrete conveying vehicle. It is also possible that the two support legs are two front support legs, one of which is arranged on the left side and one on the right side of the concrete conveying vehicle. On the first side section, a first upper joint receptacle for a front support leg and a second upper joint receptacle for a rear support leg can be formed. On the second side section, a third upper joint receptacle for a front support leg and a fourth upper joint receptacle for a rear support leg can be formed. The first upper joint receptacle can be arranged in the same longitudinal position as the third upper joint receptacle. The second upper joint receptacle can be arranged in the same longitudinal position as the fourth upper joint receptacle.The first upper joint mount can be the same distance from the longitudinal median plane as the third upper joint mount. The second upper joint mount can be the same distance from the longitudinal median plane as the fourth upper joint mount. The longitudinal distance between the first and second upper joint mounts can be greater than the transverse distance between the first and third upper joint mounts.
[0017]
[0015] The upper frame plate can have a constriction arranged between the first upper hinge mount and the third upper hinge mount, as well as between the second upper hinge mount and the fourth upper hinge mount. This means that the width of the upper frame plate is smaller in the region of the constriction than in the region of the hinge mounts. The width of the upper frame plate is defined as the dimension of the upper frame plate perpendicular to the longitudinal median plane. The middle plate can have a central constriction, so that the middle plate has a smaller width in a central region than in an outer region adjacent to the upper hinge mounts.
[0018]
[0016] The middle plate can extend over at least 40%, preferably at least 60%, and more preferably at least 80% of the width of the upper frame plate. This can apply to a longitudinally viewed section of the upper frame plate that corresponds to at least 40%, preferably at least 60%, and more preferably at least the distance between the front and rear joint mounts. The distance between the joint mounts is the distance between the pivot axes defined by the joint mounts. This ratio is determined separately for each longitudinal position of the upper frame plate. An opening formed in the center of the middle plate does not reduce the width of the middle section. Such an opening can be formed in areas of the middle plate through which no high forces are transmitted.
[0019]
[0017] With regard to height, there can be an overlap between the center plate and the first side part and / or between the center plate and the second side part. The overlap can extend over at least 40%, preferably at least 60%, and more preferably at least 80% of the thickness of the center part. In particular, the height of the center plate can lie within the height of the first side part and / or the second side part, for example, by the center plate and the side part being flush with each other on the top or bottom.
[0020]
[0018] The first side panel can be located in the same plane as the second side panel. The height position of the center panel can be selected such that the underside of the center panel coincides with the underside of the first side panel and / or the second side panel. Alternatively, the height position of the center panel can be selected such that the top of the center panel coincides with the top of the first side panel and / or the second side panel.
[0021]
[0019] The term "boiler" refers to an element of the main frame that connects to the circular shape of the pivot bearing below the pivot bearing and forms a connection to the upper frame plate and the lower frame plate. The boiler can have a closed wall, the upper end of which accommodates the circular contour of the pivot bearing. The lower end of the boiler can also be circular. If the diameters of the circles at the upper and lower ends are the same, the wall of the boiler can be cylindrical.
[0020] In one embodiment, the boiler tapers between its upper and lower ends, so that the boiler encloses a smaller area at the lower end than at the upper end. The taper can be conical. The boiler can span a smaller area at the lower end than at the upper end.The center of gravity of the area that the boiler spans with its lower end can be located further back than the axis of rotation of the rotary bearing.
[0022]
[0021] The rotary bearing can have a first bearing ring connected to the boiler. The boiler can have an annular flange at its upper end to which the first bearing ring is attached. The rotary bearing can have a second bearing ring to which the proximal end of the mast arm is attached. The second bearing ring can be provided with a toothed ring. The toothed ring can be formed on an outer surface of the second bearing ring.
[0023]
[0022] The main frame can include a rotary drive to impart a rotary motion to the second bearing ring relative to the main frame. The rotary drive can have a pinion that engages with the toothed ring of the rotary bearing. By actuating the rotary drive, the second bearing ring can be rotated relative to the first bearing ring of the rotary bearing, thereby imparting a rotary motion to the mast arm relative to the main frame. The rotary drive can be mounted on the boiler. The rotary drive can be located in front of the boiler, meaning that the boiler is situated between the rotary drive and the upper frame plate in the longitudinal direction. In one embodiment, the main frame includes a first rotary drive and a second rotary drive, both of which are mounted on the boiler and engage with the toothed ring of the rotary bearing.Redundancy can be achieved by using two drive motors, or high torque can be provided with smaller motors through parallel operation. Both rotary drives can be positioned in front of the boiler.
[0024]
[0023] The upper frame plate and the lower frame plate can be connected to each other by one or more web plates, such that the upper frame plate and the lower frame plate are held at a fixed distance from each other by the web plates. Generally, the components of the main frame can be connected to each other by welding. In particular, the upper frame plate and the lower frame plate can be welded to the boiler. The upper frame plate can be connected to an upper section of the boiler. An annular flange can be formed at the upper end of the boiler, to which the first bearing ring of the rotary bearing is attached. The upper frame plate can be connected to the annular flange.
[0025]
[0024] The lower frame plate can be designed such that each of the lower joint mounts is aligned with each of the upper joint mounts, so that each lower joint mount and each upper joint mount together form a base for a pivot joint of one of the support legs. The lower frame plate can extend in a plane parallel to the upper frame plate. The lower frame plate can have, individually or in combination, all the features described in connection with the upper frame plate.
[0026]
[0025] The invention also relates to a concrete conveying vehicle with a main frame according to the invention, an extendable mast arm, and two support legs, wherein the mast arm is connected to the main frame via a pivot bearing. The concrete conveying vehicle is designed to convey liquid concrete along the mast arm so that the liquid concrete is dispensed at a distal end of the mast arm. Each of the two support legs is attached to the main frame via a pivot joint.
[0026] Each of the support legs attached to the main frame can be a pivot leg, which is connected to the main frame of the concrete conveying vehicle via a pivot joint and can be moved between a retracted state and an extended state by a pivoting movement. One or more or all of the pivot legs of the concrete conveying vehicle can be designed as a telescopic leg. A telescopic leg can be linearly adjusted in length by moving leg segments relative to one another.When retracted, the support leg lies within the contours of the concrete pump, allowing the pump to be moved on public roads. When extended, the support leg projects far outwards, providing stability to the concrete pump. Each support leg can include a support cylinder attached to its distal end, which can be extended downwards to stabilize the concrete pump.
[0027]
[0027] The concrete conveying vehicle can be designed as a concrete pump vehicle. The concrete pump vehicle comprises a concrete pump designed to convey liquid concrete along a conveying line extending to a distal end of the mast arm. The mast arm can be composed of a plurality of mast arm segments, wherein in an unfolded state the mast arm extends over a large distance and wherein in a folded state the mast arm segments are in a compact state, such that the mast arm lies within the dimensions of the concrete pump vehicle.
[0028]
[0028] In an alternative embodiment, the concrete conveying vehicle is designed as a belt conveying vehicle. The belt conveying vehicle can comprise a mast arm, with a first belt conveyor extending to a distal end of the mast arm. The mast arm can comprise a plurality of mast arm segments, each segment carrying a section of the belt conveyor. The mast arm can be telescopically extendable between a fully extended state, in which the mast arm extends over a large distance, and a retracted state, in which the mast arm lies within the dimensions of the belt conveying vehicle. The belt conveying vehicle can comprise a second belt conveyor extending between a pre-filling hopper and a proximal end of the first belt conveyor.
[0029]
[0029] The invention is described below by way of example with reference to the accompanying drawings, using advantageous embodiments as an example. The drawings show:
[0030] Fig. 1 : a concrete pump vehicle with a mast arm in the folded state;
[0031] Fig. 2 : the concrete pump vehicle from Fig. 1 with the mast arm extended;
[0032] Fig. 3 : a schematic top view of an invention according to the concrete pump vehicle;
[0033] Fig. 4: the view according to Fig. 3 in a different state of the concrete pump vehicle;
[0034] Fig. 5 : a side view of the main frame of the concrete pump vehicle from Fig. 3;
[0035] Fig. 6 : a schematic view from below of the main frame from Fig. 5;
[0036] Fig. 7 : a side view of the main frame of the concrete pump vehicle from Fig. 3;
[0037] Fig. 8: a section along line AA in Fig. 7;
[0038] Fig. 9, 10: the view according to Fig. 8 in alternative embodiments of the invention; Fig. 11: a schematic representation of a belt conveyor vehicle according to the invention;
[0039] Fig. 12: the conveyor vehicle according to Fig. 11 in a top view.
[0040]
[0030] A concrete conveying vehicle in the form of a concrete pump truck 14, shown in Fig. 1, is equipped with a concrete pump 15 that conveys liquid concrete from a pre-filling hopper 16 through a conveying line 17. The conveying line 17 extends along a mast arm 18, which is rotatably mounted on a slewing ring 19. The mast arm 18 comprises three mast arm segments 20, 21, 22, which are articulated together. By pivoting the mast arm segments 20, 21, 22 relative to each other via the joints, the mast arm 18 can be moved between a folded state (Fig. 1) and an extended state (Fig. 2). The conveying line 17 extends beyond the distal end of the third mast arm segment 22, so that the liquid concrete can be applied in an area remote from the concrete pump 15.
[0041]
[0031] To ensure that the concrete pump vehicle remains stable even when the mast arm 18 is extended, support legs 31, 32, 33, 34 are provided, which are attached to a main frame 40 of the concrete pump vehicle 14 via pivot joints 39. The support legs 31, 32, 33, 34 can be moved between a retracted state (Fig. 3) and an extended state (Fig. 4).
[0042]
[0032] An end of the support leg 31, 32, 33, 34 adjacent to the respective pivot joint 39 is referred to as the proximal end 28. At their distal ends 29, the support legs 31, 32, 33, 34 each carry a support cylinder 35, which can be extended vertically downwards until a foot 42 attached to the support cylinder 35 touches the ground. By extending the support cylinder 35 further, the concrete pump vehicle 14 can be raised so that it rests only on the feet 42 of the support cylinders 35. The rear support legs 32, 34 can be rigid support legs of a fixed length. The front support legs 31, 33 can be designed as telescopic support legs.
[0043]
[0033] Figures 5 and 6 show the central frame 40 of the concrete pump truck, which supports the mast arm 18 and to which the support legs 31, 32, 33, 34 are attached via the pivot joints 39. A significant portion of the mechanical loads is transferred via the central frame 40 when the concrete pump truck is supported by the support legs 31, 32, 33, 34 and the mast arm 18 is in the extended position.
[0044]
[0034] The central frame 40 comprises an upper frame plate 41 and a lower frame plate 42, which are arranged in parallel horizontal planes. The upper frame plate 41 and the lower frame plate 42 are held apart from each other by a plurality of web plates 43. The web plates extend between the upper frame plate 41 and the lower frame plate 42 and are welded to both frame plates 41, 42.
[0045]
[0035] Four upper hinge mounts 51, 52, 53, 54 are formed on the upper frame plate 41, and four lower hinge mounts 55, 56, 57, 58 are formed on the lower frame plate 42. One upper hinge mount and one lower hinge mount are aligned with each other and thus together form a base for one of the pivot joints 39, on which one of the support legs 31, 32, 33, 34 is suspended. In the side view of Fig. 5, front hinge mounts 51, 55 for the left front support leg 31 and rear hinge mounts 52, 56 for the left rear support leg 32 can be seen.
[0036] The upper frame plate 41 and the lower frame plate 42 are connected via a reservoir 48 to a rotary bearing 44, 45, which forms the slewing ring 19 for the mast arm 18. The rotary bearing comprises a first bearing ring 44 and a second bearing ring 45. The first bearing ring 44 is screwed to a ring flange 46, which forms the upper end of the boiler 48.The lower end of the boiler 48 is formed by a lower flange 47. The lower flange 47 has a smaller diameter than the upper annular flange 46. The boiler wall, which extends as a closed wall over the entire circumference of the upper annular flange 46 and the lower flange 47, tapers conically from the upper end to the lower end. The upper frame plate 41 is welded to the upper annular flange 46. The lower frame plate 42 is welded to the lower flange 47. Forces transmitted from the mast arm 18 to the slewing bearing 44, 45 are introduced into the boiler 48 and from there transferred to the plate structure 41, 42 and to the support legs 31, 32, 33, 34.
[0046]
[0037] The mast arm 18 is attached to the second bearing ring 45 of the pivot bearing 44, 45. The second bearing ring 45 is provided with a toothed ring that extends over the outer circumference of the second bearing ring 45. A pinion of a drive motor 49 engages with the toothed ring. The drive motor 49 allows the second bearing ring 45 to be rotated relative to the first bearing ring 44. This causes a pivoting movement of the mast arm 18 relative to the main frame 40 of the concrete pump vehicle 14. The drive motor 49 is attached to the tank 48 and is positioned in front of the tank 48 when viewed in the longitudinal direction 50.
[0047]
[0038] According to Fig. 7, the upper frame plate 41 is composed of a center plate 60, a first side part 61, and a second side part 62. The upper hinge receptacle 51 at the front left and the upper hinge receptacle 52 at the rear left are formed on the first side part 61. The upper hinge receptacle 53 at the front right and the upper hinge receptacle 54 at the rear right are formed on the second side part 62. The two side parts 61, 62 enclose a longitudinal median plane of the main frame between them, which is defined by the axis of rotation 63 of the pivot bearing 44, 45 and by the longitudinal direction 50.
[0048]
[0039] As the sectional view in Fig. 8 shows, the side parts 61, 62 have a greater material thickness than the center plate 60. The underside of the center plate 60 lies in the same horizontal plane as the undersides of the side parts 61, 62. The outer circumferential line of the center plate 60 is flush with an inner circumferential line of the first side part 61 or with the inner circumferential line of the second side part 62 over a large part of its circumference. A continuous first weld seam 65 extends over the entire length where the center plate 60 butts against the first side part 61, welding the center part 60 to the first side part 61. Over the entire length where the center plate 60 butts against the second side valley 62, there is an uninterrupted second weld seam 66, by which the center plate 60 is welded to the second side part 62.In a central area, which does not play a significant role in the force flow between the support legs 31, 32, 33, 34, the upper frame plate 41 is provided with a recess 74. The recess 74 reduces the weight of the upper frame plate 41. Figure 9 shows an embodiment in which the material thickness is identical on both sides of the welds 65, 66.
[0049] Figure 10 shows an embodiment in which the entire central plate 60 was produced by milling from a plate with a greater material thickness.
[0040] Figures 11 and 12 show an alternative embodiment of a concrete conveying vehicle in the form of a belt conveying vehicle 64. The mast arm 67, which is mounted on a slewing ring 19, comprises a plurality of mast arm segments 71 that can be moved telescopically between a retracted and an extended state. A first belt conveyor 73 extends along the mast arm 67 from a proximal end 75 to a distal end 76. An end hose 69 is attached to the distal end 76, through which material conveyed by the first belt conveyor 73 is discharged. The material can be, for example, liquid concrete, another viscous material, or a bulk material.The conveyor vehicle 64 comprises a second conveyor belt 68, via which material that has been filled into the pre-filling container 60 is fed to the proximal end 75 of the first conveyor belt 73. The conveyor vehicle 64 is equipped with a main frame 40 designed according to the invention.
Claims
Patent claims 1. Main frame for a concrete conveying vehicle with two support legs (32, 34) and a mast arm (18), wherein the main frame comprises an upper frame plate (41), a lower frame plate (42), a reservoir, and a pivot bearing (44, 45) for the mast arm (18), wherein two upper hinge mounts (52, 54) for the two support legs (32, 34) are formed on the upper frame plate (41), wherein two lower hinge mounts (56, 58) for the two support legs (32, 34) are formed on the lower frame plate (42), wherein the pivot bearing (44, 45) is attached to the reservoir (48), and wherein the reservoir (48) provides a connection between the upper frame plate (41) and the lower frame plate (42) forms, wherein the upper frame plate (41) has a central part (60) and two side parts (61, 62), wherein the side parts (61, 62) have a greater material thickness than the central part (60), wherein on each side part (61,62) one of the two upper joint mounts ( 52 , 54 ) are formed, wherein the middle part ( 60 ) is formed as the middle plate connecting the two side parts ( 61 , 62 ).
2. Main frame according to claim 1, wherein the middle part (60) and the side part (61) are welded together by a weld (65), wherein the weld (65) extends along a circumferential section of the side part (61) and along a circumferential section of the middle part (60), such that the side part (61) and the middle part (60) are butt-welded together by the weld (65).
3. Main frame according to claim 1 or 2, wherein the weld (65) extends over at least 10% of the circumferential line of the side part (61).
4. Main frame according to any one of claims 1 to 3, wherein the height extent of the middle part (60) lies within the height extent of the side part (61).
5. Main frame according to any one of claims 1 to 4, wherein the first side part ( 61 ) and the second side part ( 62 ) enclose a longitudinal median plane (50, 63) of the main frame between them .
6. Main frame according to any one of claims 1 to 5, wherein the middle part ( 60) extends over at least 40% of the width of the upper frame plate (41 ).
7. Main frame according to any one of claims 1 to 6, wherein the middle part ( 60) has a central constriction such that the middle part ( 60) has a narrower width in a central area than in an outer area adjacent to the upper hinge mounts (52, 54 ).
8. Main frame according to any one of claims 1 to 7, wherein the boiler (48 ) tapers between its upper end (46) and its lower end (47 ).
9. Main frame according to one of claims 1 to 8, comprising a rotary drive (49) for the rotary bearing (44, 45) wherein the rotary drive (49) is arranged in front of the boiler (48).
10. Main frame according to any one of claims 1 to 9, wherein the upper frame plate (41 ) and the lower frame plate (42 ) are connected to each other by one or more web plates (43).
11. Concrete conveying vehicle comprising a main frame (40), an extendable mast arm (18, 67) and two support legs (32, 34), wherein the mast arm (18, 67) is connected to the main frame (40) via a pivot bearing (44, 45), wherein the 19 The concrete conveying vehicle is designed to convey liquid concrete along the mast arm (18, 67) so that the liquid concrete is applied at a distal end (27) of the mast arm (18, 67), wherein each of the support legs (32, 34) is attached to the main frame (40) via a pivot joint (39), wherein the main frame (40) is designed according to one of claims 1 to 10.