Concrete conveyor vehicle

Abstract

The invention relates to a concrete conveyor vehicle, comprising a primary frame (40), an extendable boom arm (18, 67), and a support leg (31, 32, 33, 34), wherein the boom arm (18, 67) is connected to the primary frame (40) via a rotary bearing (44, 45). The concrete conveyor vehicle is designed to convey liquid concrete along the boom arm (18, 67) such that the liquid concrete is discharged at the distal end (27) of the boom arm (18, 67). The support leg (31, 32, 33, 34) is attached to the primary frame (40) via a pivot joint (39), and a linear drive (61, 62) is designed to drive a pivoting movement of the support leg (31, 32, 33, 34) relative to the primary frame (40). A first end of the linear drive (61, 62) is attached to a cylinder receiving part (55, 56) of the primary frame (40), and a second end of the linear drive (61, 52) is attached to the support leg (31, 32, 33, 34). The primary frame (40) comprises a plate structure (41, 42), the plate structure (41, 42) being equipped with a joint socket (51, 52, 53, 54) for the pivot joint (39), and a chamber (48) which connects the rotary bearing (44, 45) to the plate structure (41, 42) is provided below the rotary bearing (44, 45), wherein when viewed in the longitudinal direction (50), the chamber (48) is situated between the cylinder receiving part (55, 56) and the plate structure (41, 42), and when viewed in the vertical direction (63), the cylinder receiving part (55, 56) is situated below the rotary bearing (44, 45).

Description

[0001] PUTellOPWO

[0002] 23.03.2026 / PH

[0003] concrete conveyor vehicle

[0004]

[0001] 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]

[0002] 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]

[0003] The concrete conveying vehicle comprises a main frame to which the mast arm is attached and to which the support legs are attached. To enable the support legs to be moved by pivoting motion between a retracted and an extended position, linear drives, for example in the form of hydraulic cylinders, are used, each extending between the main frame and one of the support legs. Under the given spatial conditions, it is not entirely easy to arrange the linear drives in such a way as to ensure good force transmission to the support legs and to make good use of the available space.

[0004] The invention is based on the objective of presenting 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.

[0007]

[0005] A concrete conveying vehicle according to the invention comprises a main frame, an extendable mast arm, and a support leg, 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. The support leg is attached to the main frame via a pivot joint. A linear drive is designed to drive a pivoting movement of the support leg relative to the main frame. A first end of the linear drive is attached to a cylinder receptacle of the main frame. A second end of the linear drive is attached to the support leg. The main frame comprises a plate structure, wherein a pivot receptacle for the pivot joint is formed on the plate structure. A reservoir connecting the pivot bearing to the plate structure is arranged below the pivot bearing.Viewed longitudinally, the boiler is positioned between the cylinder mount and the plate structure. Viewed vertically, the cylinder mount is located below the rotary bearing.

[0008]

[0006] The invention recognizes that a cylinder receptacle for the linear drive, arranged in front of the main frame's boiler and below the pivot bearing, offers a favorable balance between force transmission to the support leg and space utilization within the concrete pumping vehicle. The linear drive changes length during a pivoting movement of the support leg and thereby drives the pivoting movement of the support leg. A linear drive within the meaning of the invention can, for example, be a hydraulic cylinder. Another possible example is a linear drive in the form of a lifting spindle, which can be electrically driven. The cylinder receptacle is a structure against which the linear drive is supported when driving the pivoting movement. The linear drive can additionally be designed to absorb horizontal forces acting on the support leg when the concrete pumping vehicle is supported via the support leg.

[0009]

[0007] The directional specifications refer to the concrete conveying vehicle, with the longitudinal direction corresponding to the direction in which the concrete conveying vehicle moves when 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.

[0010]

[0008] 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 plate structure to which the support leg is attached. The boiler may have a closed wall, the upper end of which accommodates the circular contour of the pivot bearing. The lower end of the boiler may also be circular. If the diameters of the circles at the upper and lower ends are the same, the wall of the boiler may be cylindrical.

[0011]

[0009] In one embodiment, the boiler tapers between its upper end and its lower end, 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 form a circular shape at its lower end that is smaller than the circular shape at its upper end. The center of gravity of the area enclosed by the boiler at its lower end can be located further back than the axis of rotation of the rotary bearing.

[0010] 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 rim. The toothed rim can be formed on an outer surface of the second bearing ring.The lower end of the second bearing ring is considered the vertical position of the rotary bearing. The rotary bearing can be designed as a four-point bearing.

[0012]

[0011] The concrete conveying vehicle can include a rotary drive to power a rotary movement of the mast arm relative to the main frame. A drive motor for the rotary drive can be mounted on the main frame. The drive motor can have a pinion that engages with the toothed ring of the rotary bearing. By actuating the rotary drive, the second bearing ring of the rotary bearing can be rotated relative to the first bearing ring of the rotary bearing, thereby powering a rotary movement of the mast arm relative to the main frame.

[0013]

[0012] The drive motor can be, for example, an electric motor or a hydraulic motor. The drive motor can extend downwards from the pinion, so that the drive components are arranged below the pinion. Viewed longitudinally, the rotary drive can be arranged in front of the boiler of the main frame, so that the boiler is located between the rotary drive and the plate structure. A bracket can be attached to the wall of the boiler to support the drive motor.

[0014]

[0013] In one embodiment, the concrete conveying vehicle comprises a first drive motor and a second drive motor, both of which are mounted on the tank and engage with the toothed ring of the slewing bearing. Redundancy can be achieved by using two drive motors, or high torque can be provided with smaller motors through parallel operation. Both drive motors can extend downwards from their pinion. Both drive motors can be arranged in front of the tank, so that, viewed longitudinally, the tank is located between the drive motors and the plate structure. The two drive motors can be arranged on opposite sides of a longitudinal median plane of the concrete conveying vehicle. The longitudinal median plane is defined as a plane defined by the axis of rotation of the slewing bearing and the longitudinal direction. Both drive motors can be equidistant from the longitudinal median plane.

[0015]

[0014] The cylinder receptacle to which the first end of the linear drive is connected can be attached to the tank, in particular to the wall of the tank. The cylinder receptacle can extend forward from the wall of the tank. The linear drive can be pivotally mounted in the cylinder receptacle. The pivot axis of the linear drive can be aligned parallel to the axis of rotation of the rotary bearing. The pivot axis can coincide with the longitudinal center plane of the concrete conveying vehicle.

[0016]

[0015] Viewed in the vertical direction, the cylinder receptacle can be arranged below the rotary drive, so that there is no overlap between the cylinder receptacle and the drive motor in the vertical direction. Viewed in the horizontal dimension, there can be an overlap between the swivel range of the linear drive and the rotary drive. Due to the different positions in the vertical direction, this is possible without a collision occurring between the linear drive and the drive motor.

[0017]

[0016] The second end of the linear drive can be connected to a front support leg of the concrete conveying vehicle. The connection can be a pivotable connection. The concrete conveying vehicle can be designed such that the support leg pivots outwards when the length of the linear drive increases, and that the support leg pivots inwards when the length of the linear drive decreases.

[0018]

[0017] The concrete conveying vehicle can comprise a first linear drive for driving the left front support leg and a second linear drive for driving the right front support leg. Both linear drives can individually or in combination have the features described in connection with a single linear drive.

[0019]

[0018] In front of the boiler and below the rotary bearing, a first cylinder receptacle for the first linear drive and a second cylinder receptacle for the second linear drive can be provided. A single cylinder receptacle holding both linear drives is also possible. In both cases, the pivot axis of the first linear drive relative to the pivot receptacle can coincide with the pivot axis of the second linear drive relative to the pivot receptacle. The vertical positions of the two linear drives along the common pivot axis can differ from one another.

[0020]

[0019] It is also possible to design the system in which the pivot axis of the first linear drive does not coincide with the pivot axis of the second linear drive. In this case, both linear drives can be arranged at the same height. The pivot axes of the two linear drives can be arranged on opposite sides of the longitudinal center plane. The pivot axes of the two linear drives can be at the same distance from the longitudinal center plane.

[0021]

[0020] The plate structure can comprise an upper frame plate and a lower frame plate. The pivot joint between the support leg and the main frame can include an upper joint receptacle formed on the upper frame plate and a lower joint receptacle formed on the lower frame plate. The upper frame plate and / or the lower frame plate can extend in a horizontal plane. The upper frame plate and the lower frame plate can be aligned parallel to each other. The term "frame plate" does not imply that it must be a completely flat structure. A frame plate can be formed as a solid metal part. It is also possible for a frame plate to be formed by a sandwich structure.

[0022]

[0021] The upper frame plate and the lower frame plate can be connected to each other by one or more web plates, so 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 plate structure can be welded to the boiler and the cylinder mounts can be welded to the boiler.

[0023]

[0022] The upper frame plate and the lower frame plate can be connected to each other via the boiler. The upper frame plate can be connected to an upper section of the boiler. The lower frame plate can be connected to a lower 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.

[0024]

[0023] The plate structure of the main frame can have four pivot points, allowing two front support legs and two rear support legs to be pivotably attached to the plate structure. Each of the pivot points can individually or in combination have the features described in connection with a single pivot point. The concrete conveying vehicle can include a first linear drive and a second linear drive to drive pivoting movements of the front support legs relative to the main frame. The concrete conveying vehicle can include third and fourth linear drives to drive pivoting movements of the rear support legs relative to the main frame.

[0025]

[0024] 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 and an extended state by a pivoting motion. One, 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. In the retracted state, the support leg lies within the contour of the concrete conveying vehicle, allowing the concrete conveying vehicle to be moved in road traffic. In the extended state, the support leg projects far outwards, providing stability to the concrete conveying vehicle. Each support leg can include a support cylinder attached to the distal end of the support leg, which can be extended downwards to support the concrete conveying vehicle.

[0026]

[0025] The concrete conveying vehicle can be configured 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 extended 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.

[0027]

[0026] 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 considerable distance, and a retracted state, in which the mast arm is 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.

[0028]

[0027] The invention is described below by way of example with reference to the accompanying drawings, using advantageous embodiments as an example. The drawings show:

[0029] Fig. 1 : a concrete pump vehicle with a mast arm in the folded state;

[0030] Fig. 2 : the concrete pump vehicle from Fig. 1 with the mast arm extended;

[0031] Fig. 3 : a schematic top view of an invention according to the concrete pump vehicle;

[0032] Fig. 4: the view according to Fig. 3 in a different state of the concrete pump vehicle;

[0033] Fig. 5: a side view of the main frame of the concrete pump vehicle from Fig. 3; Fig. 6: a bottom view of the main frame from Fig. 5;

[0034] Figs. 7, 8: the view according to Fig. 6 in an alternative embodiment of the invention;

[0035] Fig. 9 : a schematic representation of a belt conveyor vehicle according to the invention;

[0036] Fig. 10: the conveyor vehicle according to Fig. 11 in a top view.

[0037]

[0028] 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.

[0038]

[0029] To ensure that the concrete pump vehicle has a stable footing 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).

[0030] 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.

[0039]

[0031] Fig. 5 shows the central frame 40 of the concrete pump vehicle, 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 vehicle is supported by the support legs 31, 32, 33, 34 and the mast arm 18 is in the extended position.

[0040]

[0032] 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.

[0041]

[0033] Four joint mounts 51, 52, 53, 54 for the support legs 31, 32, 33, 34 are formed on the central frame 40. In the side view of Fig. 5, the two joint mounts 51, 52 arranged on the left side of the vehicle for the left front support leg 31 and for the left rear support leg 32 can be seen.

[0042]

[0034] Each of the joint mounts 51, 52, 53, 54 comprises an upper joint mount connected to the upper frame plate 41 and a lower joint mount connected to the lower frame plate 42, which together with the joint components of the associated support leg 31, 32, 33, 34 form the pivot joint 39 .

[0043]

[0035] The upper frame plate 41 and the lower frame plate 42 are connected via a boiler 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 bolted to an annular flange 46, which forms the upper end of the boiler 48. The lower end of the boiler 48 is formed by a lower annular flange 47. The lower annular 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 annular 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 ring flange 47.Forces transmitted from the mast arm 18 to the rotary bearing 44, 45 are introduced into the boiler 48 and from there are transferred to the plate structure 41, 42 and to the support legs 31, 32, 33, 34.

[0044]

[0036] 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.

[0045]

[0037] The drive motor 49 is attached to the boiler 48 and is positioned in front of the boiler 48 when viewed in the longitudinal direction 50. The electromagnetic components of the drive motor 49 are arranged below the rotary bearing 44, 45 with respect to the vertical direction 63.

[0046]

[0038] As shown in Fig. 6, which shows a view from below of the main frame 40, the pivoting movement of the front support legs 31, 33 relative to the main frame 40 is driven by linear actuators in the form of two hydraulic cylinders 61, 62. Each hydraulic cylinder 61, 62 has a first end that is pivotably suspended from the central frame 40 and a second end that is pivotably suspended from one of the support legs 31, 32. When one of the hydraulic cylinders 61, 62 is extended, the corresponding support leg 31, 33 pivots outwards. For an inward pivoting movement, the hydraulic cylinders 61, 62 are retracted, thus shortening their length.

[0047]

[0039] In the embodiment shown in Fig. 6, the first hydraulic cylinder 61 is suspended from a first cylinder mount 55, which projects forward from the wall of the tank 48. The second hydraulic cylinder 62 is suspended from a second cylinder mount 56, which also projects forward from the wall of the tank 48. The two cylinder mounts 55, 66 are arranged on opposite sides of a longitudinal median plane defined by the longitudinal direction 50 and the vertical direction 63. The vertical direction 63 corresponds to the axis of rotation of the rotary bearing 44, 45. The cylinder mounts 55, 56 are arranged in a position that lies below the drive motor 49 along the vertical direction 63. With respect to the longitudinal direction 50, both cylinder mounts 55, 56 are located in front of the boiler 48. The boiler 48 is therefore arranged between the cylinder mounts 55, 56 and the plate structure 41, 42 with respect to the longitudinal direction 50.

[0048]

[0040] In the alternative embodiment according to Fig. 7, the rotary movement of the mast arm 18 is driven by two drive motors 49, which are arranged on two sides of the longitudinal center plane 50, 63. The two hydraulic cylinders 61, 62 are suspended in a common cylinder receptacle 55. The cylinder receptacle 55 defines a common pivot axis for the first hydraulic cylinder 61 and the second hydraulic cylinder 62. With respect to the vertical direction 63, the first hydraulic cylinder 61 is located in the cylinder receptacle 55 below the second hydraulic cylinder 62. Both hydraulic cylinders 61, 62 are arranged below the drive motors 49. There is an overlap between the pivot range of the hydraulic cylinders 61, 62 and the horizontal position of the drive motors 49.

[0049]

[0041] Fig. 8 shows a further embodiment in which the two cylinder mounts 55, 56 project further forward from the boiler 48. The pivot axes of the cylinder mounts 55, 56 lie outside the circumference of the rotary bearing 44, 45. In addition, the pivot axis of the cylinder mounts 55, 56 is located further forward than the axis of rotation of the drive motor 49.

[0050]

[0042] In all variants, the components required for the operation of the concrete pump vehicle are arranged in a compact manner relative to each other, so that the space available in the vicinity of the main frame 40 is used well.

[0051]

[0043] Figures 9 and 10 show an alternative embodiment of a concrete conveying vehicle in the form of a belt conveyor 66. The mast arm 67, mounted on a slewing ring 19, comprises a plurality of mast arm segments 71, which can be moved telescopically between a retracted and an extended position. 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 66 includes 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 is equipped with a main frame 40 in which the hydraulic cylinders for actuating the support legs are designed in a manner in accordance with the invention.

Claims

Patent claims 1. Concrete conveying vehicle comprising a main frame (40), a movable mast arm (18, 67) and a support leg (31, 32, 33, 34), wherein the mast arm (18, 67) is connected to the main frame (40) via a pivot bearing (44, 45), wherein the concrete conveying vehicle is designed to convey liquid concrete along the mast arm (18, 67) so that the liquid concrete is dispensed at a distal end (27) of the mast arm (18, 67), wherein the support leg (31, 32, 33, 34) is attached to the main frame (40) via a pivot joint (39), comprising a linear drive (61, 62) for driving a Pivoting movement of the support leg (31, 32, 33, 34) relative to the main frame (40), wherein a first end of the linear drive (61, 62) is attached to a cylinder receptacle (55, 56) of the main frame (40), wherein a second end of the linear drive (61, 52) is attached to the support leg (31, 32, 33, 34).wherein the main frame (40) comprises a plate structure (41, 42) wherein a joint receptacle (51, 52, 53, 54) of the pivot joint (39) is formed on the plate structure (41, 42) wherein a boiler (48) connecting the pivot bearing (44, 45) with the plate structure (41, 42) is arranged below the pivot bearing (44, 45) wherein, viewed in the longitudinal direction (50), the boiler (48) is arranged between the cylinder receptacle (55, 56) and the plate structure (41, 42), and wherein, viewed in the vertical direction (63), the cylinder receptacle (55, 56) is arranged below the pivot bearing (44, 45).

2. Concrete conveying vehicle according to claim 1, wherein the linear drive ( 61 , 52 ) is a hydraulic cylinder .

3. Concrete conveying vehicle according to claim 1 or 2, wherein the tank (48) tapers between its upper end (46) and its lower end (47).

4. Concrete conveying vehicle according to any one of claims 1 to 3, comprising a rotary drive (49) for driving a rotary movement of the mast arm (18) relative to the main frame (40), wherein the rotary drive (49) is arranged in front of the tank (48).

5. Concrete conveying vehicle according to claim 4, wherein the rotary drive (49) is supported by a bracket attached to the tank (48).

6. Concrete conveying vehicle according to one of claims 1 to 5, wherein the cylinder receptacle (55, 56) is attached to the tank (48).

7. Concrete conveying vehicle according to one of claims 1 to 6, wherein a pivot axis defined by the joint mount (55, 56) coincides with a longitudinal median plane (50, 63) of the concrete conveying vehicle.

8. Concrete conveying vehicle according to one of claims 4 to 7, wherein the articulated mounting (55, 56) is arranged below the rotary drive (49).

9. Concrete conveying vehicle according to one of claims 1 to 8, wherein the linear drive ( 61, 62 ) extends to a front support leg (31, 33) of the concrete conveying vehicle .

10. Concrete conveying vehicle according to any one of claims 1 to 9, comprising the first joint mount (55) and a second joint mount (56), wherein the first joint mount (55) and the second joint mount (56) define a common pivot axis.

11. Concrete conveying vehicle according to one of claims 1 to 10, comprising the first linear drive ( 61 ) and a second linear drive ( 62 ) for driving a pivoting movement of a second support leg ( 31 , 32 , 33 , 34 ), wherein the second linear drive ( 62 ) is arranged in a different vertical position than the first linear drive ( 61 ).

12. Concrete conveying vehicle according to one of claims 1 to 11, wherein the plate structure ( 41 , 42 ) comprises an upper frame plate ( 41 ) and a lower frame plate ( 42 ).

13. Concrete conveying vehicle according to claim 12, wherein the upper frame plate ( 41 ) and the lower frame plate ( D2 ) are connected to each other via the tank ( 48 ).

14. Concrete conveying vehicle according to one of claims 1 to 13, wherein four articulated mountings (51, 52, 53, 54) for four support legs (31, 32, 33, 34) are formed on the plate structure (41, 42).

15. Concrete conveying vehicle according to one of claims 1 to 14, wherein the support leg ( 31 , 33 ) is a telescopic leg .

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