Concrete conveyor vehicle

Abstract

A concrete conveyor vehicle comprising a frame (26), an extendable boom arm (18, 67) and a control cabinet (23), wherein the frame (26) bears the boom arm (18, 67), wherein the concrete conveyor vehicle is designed to convey liquid concrete along the boom arm (18, 67), such that the liquid concrete is discharged at a distal end (76) of the boom arm (18, 67). The concrete conveyor vehicle (14, 66) is equipped with a first support leg (31, 33) and with a second support leg (32, 34), wherein the first support leg (31, 33) and the second support leg (32, 34) are attached to the frame. The first support leg (31, 33) and the second support leg (32, 34) are arranged on one side of the concrete conveyor vehicle (14, 66). The first support leg (31, 33) and the second support leg (32, 34) are designed as pivoting legs. The control cabinet is designed to transmit control commands to components (15, 18, 31, 32, 33, 34) of the concrete conveyor vehicle. The concrete conveyor vehicle (14, 66) comprises a primary operating unit (24) and a secondary operating unit (25), wherein the primary operating unit (24) is designed to communicate with the control cabinet (23) via a radio connection. The secondary operating unit (25) forms a structural unit which is spatially separated from the control cabinet (23). The secondary operating unit (25) is attached in a lateral position to the concrete conveyor vehicle (14, 66). The secondary operating unit (25) is arranged in a longitudinal position which lies between the distal end (28) of the first support leg (31, 33) and the distal end (30) of the second support leg (32, 34).

Description

Concrete conveyor vehicle

[0001] The invention relates to a concrete conveyor vehicle.

[0002] Concrete conveyor vehicles are used to convey liquid concrete or similar materials, such as bulk materials or thick materials, along a boom arm of the concrete conveyor vehicle so that the liquid concrete can be applied to a desired location via a distal end of the boom arm. The boom arm is usually composed of a plurality of boom arm segments, with the boom arm extending over a great distance in an extended state and the boom arm segments being in a compact state when retracted, so that the boom arm lies within the dimensions of the concrete conveyor vehicle.

[0003] Having the boom arm mounted on a vehicle results in high mobility, so that the machine can be easily used in different locations. Before use, support legs are extended outwards to securely support the concrete conveyor vehicle. This support ensures that the concrete conveyor vehicle has a secure footing even when the boom arm is extended far to the side. There are types of concrete conveyor vehicles in which both the front and rear support legs are designed as pivoting legs. The invention relates to this type of concrete conveyor vehicle.

[0004] Concrete conveyor vehicles include a control cabinet that sends control commands to components of the concrete conveyor vehicle. The components are controlled based on inputs from an operator. It has proven to be It has not proven easy to design a concrete conveyor vehicle so that it can be easily operated in every situation.

[0005] The invention is based on the object of presenting a concrete conveyor vehicle that is easy to operate. This object is achieved by the features of the independent claim. Advantageous embodiments are specified in the subclaims.

[0006] A concrete conveyor vehicle according to the invention comprises a frame, a movable boom arm and a control cabinet. The frame supports the boom arm. The concrete pump is designed to convey liquid concrete along the boom arm so that the liquid concrete is discharged at a distal end of the boom arm. The concrete conveyor vehicle is equipped with a first support leg and a second support leg which are attached to the frame. The first support leg and the second support leg are arranged on one side of the concrete conveyor vehicle. The first support leg and the second support leg are designed as pivoting legs. The control cabinet is designed to send control commands to components of the concrete conveyor vehicle. The concrete conveyor vehicle comprises a primary control unit and a secondary control unit. The primary control unit is designed to communicate with the control cabinet via a radio connection.The secondary control unit forms a structural unit that is spatially separate from the control cabinet and is mounted in a lateral position on the concrete conveyor vehicle. The secondary control unit is arranged in a longitudinal position that lies between the distal end of the first support leg and the distal end of the second support leg. This information refers to the pivoted-in state of the first support leg and the second support leg.

[0007] In the concrete conveyor vehicle according to the invention, a primary control unit and a secondary control unit are provided for operating inputs to the control cabinet. The primary control unit is a radio remote control that communicates with the control cabinet via radio. The primary control unit can be used to control functions such as pivoting in / out one or more support legs and / or retracting / extending the boom arm. There may be other functions of the concrete conveyor vehicle that are accessible via the primary control unit.

[0008] The secondary control unit is attached to the concrete conveyor vehicle. As the secondary control unit forms a spatially separate unit from the control cabinet, the control cabinet can be located wherever spatially convenient, while the secondary control unit is positioned so that it is easily accessible for operators. The purpose of the secondary control unit can, for example, be to provide redundancy in the event that the primary control unit fails, or to make certain advanced functions available via the secondary control unit which are not accessible via the primary control unit. The secondary control unit can include all functions which are accessible via the primary control unit. In the day-to-day operation of the concrete conveyor vehicle, the primary control unit is generally used more frequently than the secondary control unit.

[0009] In concrete conveyor vehicles where the front and rear support legs are designed as pivoting legs, a significant part of the vehicle length is taken up by the support legs when the support legs are in the retracted position. Therefore, there is not readily available space for the secondary control unit to be conveniently located. can be brought into operation. This has so far resulted in the secondary control unit being mounted in places on the concrete conveyor vehicle that are not very ergonomically favorable. For example, there are concrete conveyor vehicles in which the secondary control unit is located on top of the vehicle, meaning that the operator has to climb onto the concrete conveyor vehicle every time an operation is to be carried out using the secondary control unit.

[0010] There are other types of concrete conveyor vehicles where this problem does not arise. These are, for example, concrete conveyor vehicles where there is so much space available that the control cabinet together with the secondary control unit can be installed in a position that is easily accessible for people. This is often the case, for example, when the front and / or rear support legs are designed as telescopic legs that can be extended sideways without pivoting. In such concrete conveyor vehicles, the support legs take up a much smaller part of the external surface of the concrete conveyor vehicle and there are many options for advantageous positioning of the control cabinet and any secondary control unit attached to it.

[0011] The invention recognizes that even with concrete conveyor vehicles in which the support legs at the front and rear are designed as pivoting legs, it is possible to attach the secondary control unit to the concrete conveyor vehicle in an ergonomically favorable manner. The invention proposes attaching the secondary control unit to the side of the concrete conveyor vehicle and between the front support leg and the rear support leg in order to improve the user-friendliness of the concrete conveyor vehicle.

[0012] The concrete pumping vehicle includes a first pivot joint, via which the first support leg is pivotally connected to the frame of the concrete pumping vehicle. The concrete pumping vehicle includes a second pivot joint, via which the second support leg is pivotally connected to the frame of the concrete pump. An end of a support leg adjacent to the pivot joint is called the proximal end of the support leg. An end of the support leg remote from the pivot joint is called the distal end of the support leg.

[0013] The concrete conveyor vehicle can be designed such that, when pivoted in, the first support leg extends forwards from the first pivot joint. The first support leg can be a front support leg of the concrete conveyor vehicle. The concrete conveyor vehicle can be designed such that, when pivoted in, the second support leg extends rearwards from the second pivot joint. The second support leg can then be a rear support leg. The concrete conveyor vehicle can comprise a first support leg and a second support leg on each of the two sides of the vehicle. A reverse design is also possible, in which the first support leg forms a rear support leg and the second support leg forms a front support leg of the concrete conveyor vehicle. In order to enable long support legs that can therefore be moved far outwards, it is advantageous if the first pivot joint and the second pivot joint are positioned close to one another in the longitudinal direction.In this way, the largest part of the side surface of the concrete conveyor vehicle is taken up by the support legs.

[0014] The longitudinal direction is the direction in which the concrete conveyor vehicle moves when traveling straight ahead. The forward direction indicates the direction in which the vehicle moves when traveling forward. The directional "Rear" refers to the direction of reversing. The lateral direction forms a right angle with the longitudinal direction. The longitudinal direction, the lateral direction, and the vertical direction form a Cartesian coordinate system within which the position of the secondary control unit is specified.

[0015] If the secondary control unit is arranged in a lateral position on the concrete conveyor vehicle, the secondary control unit is accessible to an operator approaching the concrete conveyor vehicle from the side. The secondary control unit can be arranged on the left-hand side of the vehicle or on the right-hand side of the vehicle; it is also possible to have a first secondary control unit on the left-hand side of the vehicle and a second secondary control unit on the right-hand side of the vehicle. A longitudinal position is a specific position related to the longitudinal direction of the vehicle. If the secondary control unit is arranged in a longitudinal position, it has an extension in the longitudinal direction that corresponds to the width of the secondary control unit.

[0016] The secondary control unit can have a fixed position relative to the frame of the concrete conveyor vehicle, so that the first support leg and the second support leg can be pivoted without changing the position of the secondary control unit relative to the frame. The fixed feature does not preclude the secondary control unit from being movable relative to the frame in a process independent of the support legs.

[0017] Information on the position of the secondary control unit generally refers to a control panel of the secondary control unit, i.e. a field within which the control elements of the secondary control unit are arranged. Is the If the secondary control unit is designed as a structural unit, the position information can also refer to the structural unit.

[0018] The first pivot joint may comprise a first structural member attached to the frame of the concrete conveyor vehicle and a second structural member from which the first support leg is suspended. The first structural member and the second structural member together form the pivot joint. The first pivot joint has a vertical extension extending between an upper end and a lower end of the first pivot joint. The secondary operating unit may be arranged in a vertical position such that the vertical extension of the secondary operating unit overlaps the vertical extension of the first pivot joint.In one embodiment, the vertical extent of the secondary control unit lies entirely within the vertical extent of the first pivot joint, so that the lower end of the pivot joint is in a lower position than the lower end of the secondary control unit and so that the upper end of the first pivot joint is in a higher position than the upper end of the secondary control unit.

[0019] Also included are embodiments in which there is no overlap between the vertical position of the secondary control unit and the vertical extension of the first pivot joint. In particular, the secondary control unit can be located below the vertical extension of the first pivot joint. The longitudinal position of the secondary control unit can then be between the proximal end of the first support leg and the distal end of the first support leg. The distance between the distal end of the support leg and the secondary control unit can be greater, preferably by at least a factor of 2, preferably at least a factor of 5. be greater than the distance between the proximal end of the support leg and the secondary control unit. The characteristics relating to the structure of the first pivot joint and the vertical position of the first pivot joint relative to the secondary control unit can also apply to the second pivot joint, individually or in combination.

[0020] The joint axis of the first pivot joint can be arranged in a different longitudinal position than the joint axis of the second pivot joint. In particular, the first pivot joint can be arranged in a longitudinal position that is further forward than the longitudinal position of the second pivot joint. The secondary control unit can be arranged in a longitudinal position that lies between the longitudinal position of the first pivot joint and the longitudinal position of the second pivot joint. This information refers in each case to the proximal end of the pivot joint. In other words, there is then no overlap between the horizontal extent of the secondary control unit and the horizontal extent of one of the pivot joints. In an alternative embodiment, the longitudinal position of the secondary control unit can lie between the axis of the first pivot joint and the axis of the second pivot joint.

[0021] The secondary control unit can be arranged in a longitudinal position so that the horizontal extent of the secondary control unit overlaps with the horizontal extent of the first pivot joint. If the first pivot joint is a pivot joint of the front support leg, this means that a front end of the secondary control unit is arranged further forward than the rear end of the first pivot joint. If the first pivot joint is a pivot joint of the rear support leg, this means that a rear end of the secondary control unit is arranged further rearward than the rear end of the first pivot joint. This can be This embodiment can be realized by arranging the secondary control unit at a different height position than the first swivel joint.

[0022] Alternatively, this can also be achieved if the vertical extension of the secondary control unit overlaps the vertical extension of the first pivot joint. In particular, the vertical extension of the secondary control unit can lie within the vertical extension of the first pivot joint, which means that the upper end of the secondary control unit has a lower position than the upper end of the first pivot joint and that the lower end of the secondary control unit has a higher position than the lower end of the first pivot joint.

[0023] The first pivot joint may have a recess which accommodates the secondary control unit. This means that the secondary control unit is arranged in part or in whole in a space which is formed by the recess. The recess may be arranged between the upper end of the first pivot joint and the lower end of the first pivot joint. The recess may be dimensioned such that it extends beyond the axis of the first pivot joint. The secondary control unit may then be arranged such that there is an overlap between the horizontal position of the joint axis and the horizontal extent of the first control unit. The first pivot joint may have a two-part pivot pin such that a first section of the pivot pin is arranged above the secondary control unit and a second section of the pivot pin is arranged below the secondary control unit.

[0024] The same applies to the second pivot joint. In one embodiment, the first pivot joint has a recess and the second pivot joint has a recess, so that both recesses accommodate the secondary control unit. Both pivot joints can have a split pivot pin.

[0025] The information on the position of the secondary control unit refers to a state of the concrete conveyor vehicle in which the secondary control unit is designed for operating inputs by an operator (usable state of the secondary control unit). The secondary control unit can be permanently arranged in this position so that the position of the secondary control unit relative to the frame of the concrete conveyor vehicle does not change during operation. With a permanently arranged secondary control unit, it is advantageous if it does not protrude laterally beyond the outside of the first support leg (when pivoted in) in order to keep the risk of damage to the secondary control unit to a minimum when the concrete conveyor vehicle is moving.

[0026] It is also advantageous if the secondary control unit does not protrude too far inwards in the lateral direction. The space inside the secondary control unit is required for other components and parts of the concrete conveyor vehicle. The secondary control unit can be arranged so that it does not protrude further inwards than a plane that spans an inner end of the first swivel joint with the longitudinal direction. It is also possible for the secondary control unit to be arranged so that it does not protrude further inwards than a plane that spans an inner end of the first support leg in the area of the first swivel joint with the longitudinal direction. This information refers to the swiveled-in state of the first support leg. In one embodiment, the secondary control unit is arranged so that it does not protrude further inwards than a plane that is spanned by the axis of the first swivel joint and the longitudinal direction.With such a flat design of the secondary control unit on the outside. The desired flexibility for the design and construction of the concrete conveyor vehicle is otherwise retained. This information can refer to the operating state of the secondary control unit. In one embodiment, the information refers to the operating state and a storage state of the secondary control unit.

[0027] Alternatively, the concrete conveyor vehicle can also be designed so that the position of the secondary control unit can change. For example, the secondary control unit can be moved between the use position and a storage position. In the use position, the secondary control unit can project laterally beyond the outside of the first support leg, whereas this is not the case in the storage position. The secondary control unit can, for example, be moved between the storage position and the use position by a pivoting movement or a linear movement. The secondary control unit can be held on the frame by a holding device which allows the secondary control unit to move accordingly. The secondary control unit can also be detachably connected to the frame of the concrete conveyor vehicle.In one embodiment, operating inputs for the control cabinet can be made even when the secondary control unit is detached from the frame of the concrete conveyor vehicle.

[0028] In alternative embodiments, the secondary control unit can be attached to the first support leg. Relative to a length of the first support leg that extends between the axis of the first pivot joint and the distal end of the first support leg in the pivoted-in state, the secondary control unit can be arranged in a proximal section of the first support leg, i.e. a section adjacent to the first pivot joint. The distance between the secondary control part and the distal end of the front support leg is preferably at least a factor of 2, preferably at least a factor of 5, more preferably at least a factor of 10 greater than the distance between the front end of the secondary operating part and the joint axis of the first pivot joint. If the first support leg is a telescopic support leg, the secondary operating unit is preferably attached to a proximal pivot leg box of the first support leg, i.e. to the pivot leg box that borders on the first pivot joint when the telescopic support leg is in the extended state. The first support leg can be a front support leg of the concrete conveyor vehicle. It is also possible for the first support leg to be a rear support leg of the concrete conveyor vehicle.

[0029] The concrete delivery vehicle can be designed as a concrete pump vehicle. The concrete pump vehicle includes a concrete pump that is designed to deliver liquid concrete along a delivery line that extends to a distal end of the boom arm. The boom arm can be composed of a plurality of boom arm segments, wherein in an unfolded state the boom arm extends over a large distance and wherein in a folded state the boom arm segments are in a compact state so that the boom arm lies within the dimensions of the concrete pump vehicle. The functions that are accessible via the primary control unit and / or the secondary control unit can include switching the concrete pump on / off and / or adjusting the delivery rate of the concrete pump.

[0030] In an alternative embodiment, the concrete conveyor vehicle is designed as a belt conveyor vehicle. The belt conveyor vehicle may comprise a boom arm in which a first belt conveyor extends to a distal end of the boom arm. The boom arm may comprise a plurality of boom arm segments wherein each segment supports a portion of the belt conveyor. The boom arm may be telescopic between an extended state, in which the boom arm extends a large distance, and a retracted state, in which the boom arm lies within the dimensions of the belt conveyor vehicle. The belt conveyor vehicle may include a second belt conveyor extending between a prefill hopper and a proximal end of the first belt conveyor.

[0031] The invention is described below by way of example with reference to the accompanying drawings using advantageous embodiments. They show: Fig. 1: a concrete pump vehicle with a boom arm in the folded state; Fig. 2: the concrete pump vehicle from Fig. 1 with the boom arm unfolded; Fig. 3: a schematic view from above of a concrete pump vehicle according to the invention; Fig. 4: the view according to Fig. 3 in a different state of the concrete pump vehicle; Fig. 5: a side view of a section of a concrete pump vehicle according to the invention; Fig. 6: a top view of the embodiment according to Fig. 5; Fig. 7: the view according to Fig. 5 in an alternative Embodiment of the invention; Fig. 8: a top view of the embodiment according to Fig. 7; Fig. 9: the view according to Fig. 8 in a different state of the secondary control unit; Fig. 10-16: the view according to Fig. 5 in further embodiments of the invention; Fig. 17: a top view of the embodiment according to Fig. 16; Fig. 18: a top view of a support leg of a concrete pump vehicle according to the invention; Fig. 19: the view according to Fig. 5 in a further embodiment of the invention; Fig. 20: a schematic representation of a concrete conveyor vehicle according to the invention in the form of a belt conveyor vehicle; Fig. 21: the belt conveyor vehicle from Fig. 20 in a view from above.

[0032] A concrete delivery vehicle shown in Fig. 1 in the form of a concrete pump vehicle 14 is equipped with a concrete pump 15 that delivers liquid concrete from a pre-filling container 16 through a delivery line 17. The delivery line 17 extends along a boom arm 18, which is rotatably mounted on a slewing ring 19. The boom arm 18 comprises three boom arm segments 20, 21, 22 that are articulated to one another. By pivoting the boom arm segments 20, 21, 22 relative to one another via the joints, the boom arm 18 can be moved between a folded state (Fig. 1) and an unfolded state (Fig. 2). The delivery line 17 extends beyond the distal end of the third boom arm segment 22, so that the liquid concrete can be applied in an area remote from the concrete pump 15.

[0033] To ensure that the concrete pump vehicle remains stable even when the boom arm 18 is unfolded, support legs 31, 32, 33, 34 are provided, which can be moved by a pivoting movement between a retracted state (Fig. 3) and an extended state (Fig. 4). The left front support leg 31 is attached to the frame 26 of the concrete pump vehicle 14 via a first pivot joint 41. The left rear support leg 32 is attached to the frame 26 of the concrete pump vehicle 14 via a second pivot joint 42. Accordingly, the right front support leg 33 and the right rear support leg 34 are attached to the frame 26 via first and second pivot joints 41, 42. An end of the support leg 31, 32, 33, 34 adjacent to the pivot joint 41, 42 is referred to as the proximal end.

[0034] The front support legs 31, 33 each carry an outrigger cylinder 35 at their forward distal end 28, and the rear support legs 32, 34 each carry an outrigger cylinder 35 at their rear distal end 30, which can be extended vertically downward until a foot attached to the outrigger cylinder 35 touches the ground. By further extending the outrigger cylinder 35, the concrete pump vehicle 14 can be raised so that it rests solely on the feet of the outrigger cylinders 35.

[0035] The rear support legs 32, 34 can be rigid support legs with a fixed length. The front support legs 31, 33 can be designed as telescopic support legs. According to Fig. 18, the left front support leg 31 comprises a proximal pivot leg box 36, a middle pivot leg box 37, and a distal pivot leg box 38, which can be telescopically pushed into one another. The proximal pivot leg box 36 forms the proximal end 27 of the support leg 31 and is attached to the frame 26 of the concrete pump vehicle 14 via the first pivot joint 41. The distal pivot leg box 38 adjoins the distal end 28 of the support leg 31 and carries the support cylinder 35.

[0036] The concrete pump vehicle 14 comprises a control cabinet 23, via which various components of the concrete pump vehicle 14 are controlled. For example, the boom arm 18 can be controlled via the control cabinet 23 in order to trigger folding movements between the boom arm segments 20, 21, 22. The pumping device of the concrete pump 15 can be controlled in order to switch the pumping device on or off or to adjust the quantity of liquid concrete pumped. A pivoting movement or telescopic movement of the support legs 31, 32, 33, 34 can be triggered. The pivoting legs can be controlled individually or in groups. There are further functions of the concrete pump vehicle 14 that can also be controlled via the control cabinet 23.

[0037] According to Fig. 2, a primary operating unit is provided in the form of a radio remote control 24. The radio remote control 24 communicates via a radio link with the control cabinet 23 in order to be able to control the aforementioned functions of the concrete pump vehicle 14. The radio remote control 24 comprises a display on which information about the operating status of the concrete pump vehicle 14 can be shown. This information is transmitted via the radio link from the control cabinet 23 to the radio remote control 24. The operator can freely choose their position while operating the components of the concrete pump vehicle 14 and position themselves so that the relevant areas of the concrete pump vehicle 14 and the surrounding area are clearly visible.

[0038] The concrete pump vehicle 14 includes a secondary control unit 25 which is mounted on the frame 26 in a lateral position of the concrete pump vehicle 14. The secondary control unit 24 communicates in the embodiment via a cable connection to the control cabinet 23. The secondary control unit 25 includes all control functions that are also accessible via the primary control unit 24, so that the secondary control unit 25 provides redundancy in the event that the primary control unit 24 fails. In addition, the secondary control unit 25 includes further functions that are not accessible via the primary control unit 24. For example, certain basic settings can be made or certain more in-depth information about parameters of the concrete pump vehicle 14 can be called up via the secondary control unit 25.

[0039] In previous concrete pump vehicles it is usual for the secondary control unit to be attached directly to the control cabinet. Since the control cabinet 23 is often not arranged in a position in which the control cabinet 23 is easily accessible, using the secondary control unit is cumbersome. In the exemplary embodiment shown, the operator would have to climb onto the body of the concrete pump vehicle 14 in order to be able to use the secondary control unit. According to the invention it is proposed to spatially separate the secondary control unit 25 from the control cabinet 23 and to arrange the secondary control unit 25 in a more easily accessible position. This position is a lateral position with respect to the concrete pump vehicle 14. The position is selected such that the secondary control unit 25 is easily accessible regardless of the pivoting state of the support legs 31, 32, 33, 34.

[0040] In the embodiment of Fig. 5, 6, the secondary control unit 25, which comprises a display 45 and control elements 46, is attached to the frame 26 of the concrete pump vehicle 14 via a rigid holder 51. According to Fig. 6, which shows a view from above, the secondary control unit 25 is slightly recessed from the outside of the pivoted support legs 31, 32, thereby reducing the risk that the secondary control unit 25 is damaged when the concrete pump vehicle 14 is traveling. The secondary control unit 25 does not protrude inwards beyond a plane 65 which is spanned by the articulation axes 49, 50 and the longitudinal direction. This leaves space laterally within the plane 65 for other components and parts of the concrete pump vehicle 14. Figs. 7-9 show an alternative embodiment in which the secondary control unit is attached to the frame 26 via a telescopic holder 53. In a stowed state (Fig. 8), the secondary control unit 25 is pulled inwards so that it does not protrude beyond the support legs 31, 32. In the use state (Fig. 9), the secondary control unit 25 protrudes laterally beyond the support legs 31, 32, which allows good accessibility to the controls.Even in the stowed state, the secondary operating unit 25 does not project inwards beyond a plane which is spanned by the inner end of the first support leg 31 in the longitudinal direction.

[0041] The first pivot joint 41 is formed by a first structural component connected to the frame 26 and a second structural component connected to the front support leg 31. The first structural component carries a hinge pin 49 which extends along the hinge axis 43 of the first pivot joint 41. The second structural component is rotatably mounted on the hinge pin 49. The second pivot joint 42 is constructed accordingly, with the second hinge pin 50 extending along a hinge axis 44 of the second pivot joint 42. The first pivot joint 41 has a rear end 47, beyond which the structural components of the first pivot joint 41 do not protrude. The second pivot joint 42 has a front end 48, beyond which the structural components of the second pivot joint 42 do not protrude. The ends 47 , 48 each correspond to the proximal end of the support legs 31 , 32 .The longitudinal position of the secondary control unit 25 is between the rear end 47 of the first pivot joint 41 and the front end. End 48 of the second pivot joint 42. This applies to the entire horizontal extension 60 of the secondary control unit. The horizontal extension 60 of the secondary control unit 25 therefore does not overlap with the horizontal extension 61 of the first pivot joint 41 or the horizontal extension of the second pivot joint 42.

[0042] In the further embodiment according to Fig. 10, 11, the secondary control unit 25 is arranged in a vertical position in the use state, which lies below the vertical extension 52 of the first pivot joint 41 and the second pivot joint 42. In other words, the upper end of the secondary control unit 25 is arranged in a lower position than the lower end of the pivot joints 41, 42. There is no overlap between the vertical extension 59 of the secondary control unit 25 and the vertical extension 52 of the first pivot joint 41. In this embodiment, the secondary control unit 25 is still easily accessible in the use state, even when the concrete pump vehicle 14 is raised to a higher position.The longitudinal position of the secondary control unit 25 is the same as in the previous embodiments, in that the secondary control unit 25 is arranged between the rear end of the first pivot joint 41 and the front end of the second pivot joint 42.

[0043] The secondary control unit 25 is connected to the frame 26 via a pivoting mechanism 54. In Fig. 11, the control unit 25 is shown in the pivoted-in state. The pivoting mechanism 54 has been moved through 90° so that the secondary control unit 25 moves from a vertical position to a horizontal position. In the horizontal position, the secondary control unit 25 is accommodated in a recess in the frame 26 and is well protected there during travel.

[0044] Fig. 12 shows an embodiment in which the hinge pin 49 of the first pivot joint 41 is split in two, a free space in the form of a recess 63 remaining between an upper section and a lower section of the hinge pin 49. The secondary operating unit 25 is arranged such that part of the secondary operating unit 25 lies within the recess 63. There is an overlap between the longitudinal position of the first pivot joint 41 and the longitudinal position of the secondary operating unit 25. The front end of the secondary operating unit 52 lies further forward than the rear end 47 of the first pivot joint 41. In the vertical direction, the secondary operating unit 25 is arranged in a position which lies between the upper section of the hinge pin 49 and the lower section of the hinge pin 49.With respect to the lateral direction, there may also be an overlap between the structural components of the first pivot joint 41 and the secondary control unit 25. The information regarding the vertical position and the lateral position of the secondary control unit 25 applies equally to the embodiments of Figs. 13-15.

[0045] In the embodiment according to Fig. 13, the secondary control unit 25 is displaced further forward, so that the overlap in the longitudinal position between the secondary control unit 25 and the first pivot joint 41 is even more pronounced. The overlap extends beyond the joint axis 43 of the first pivot joint 41. The front end of the secondary control unit 25 is located further forward than the joint axis 43 of the first pivot joint 41.

[0046] In Fig. 14 an embodiment is shown in which both the hinge pin 49 of the first pivot joint 41 and the hinge pin 50 of the second pivot joint 42 are divided into two parts. In both hinge pins 49, 50 there is a recess 63, 64 between the upper section and the lower Section of the pivot pin. The secondary control unit 25 is arranged in a longitudinal position which includes an overlap with the front support leg 31 and an overlap with the rear support leg 32. The overlap extends in each case so far that the secondary control unit 25 overlaps with the axis 43 of the first pivot joint 41 and with the axis 44 of the second pivot joint 42.

[0047] In the embodiment according to Fig. 15, the first pivot joint 41 of the front support leg 31 and the second pivot joint 42 of the rear support leg 32 have a common pivot axis 55. The pivot pin 56 is divided into two sections, between which a free space remains. The two pivot receptacles of the rear support leg 32 are spaced apart by a greater distance and sandwich the pivot receptacles of the front support leg 31. Both support legs 31, 32 are mounted on the same pivot pin 56.

[0048] The secondary operating unit 25 is arranged between the two sections of the hinge pin 56 and is thus received within the recesses 63, 64. The hinge axis 55 of the hinge pin overlaps with the longitudinal position of the secondary operating unit 25. In relation to the lateral direction, the secondary operating unit 25 can also intersect with the hinge axis 55. Alternatively, the secondary operating unit 25 can be located further inward or further outward than the hinge axis 55. Embodiments are also possible in which the first pivot joint 41 and the second pivot joint 42 have a common hinge axis 55 and in which the secondary operating unit 25 is arranged below the pivot joints 41, 42.

[0049] In Fig. 16-18, the secondary control unit 25 is mounted on the front support leg 31. The front support leg 31 is provided with a recess 57 within which the secondary operating unit 25 is positioned. The recess 57 is so deep that the secondary operating unit 25 is completely recessed laterally therein. According to Fig. 18, the recess 57 is formed in the proximal pivot leg box 36. The middle pivot leg box 37 is shaped such that it can be completely recessed into the proximal pivot leg box 36 despite the recess 57. Because the secondary operating unit 25 is arranged at a short distance from the joint axis of the first pivot joint 41, the position of the secondary operating unit 25 changes only slightly when the front support leg 31 is pivoted out. Regardless of the pivot position of the front support leg 31, the secondary operating unit 25 is in a position in which it is easily accessible. Alternatively, it is also possible for the secondary control unit 25 to be attached to the rear support leg 32.

[0050] In the embodiment according to Fig. 19, the secondary control unit 25 is also attached to the front support leg 31. The position of the secondary control unit 25 is lower than in the previous embodiment, so that the secondary control unit 25 projects downward beyond the contour 58 of the front support leg 31. In this position, the secondary control unit 25 is easily accessible to an operator even when the concrete pump vehicle 14 is raised to a higher position.

[0051] In Fig. 20, 21 an alternative embodiment of a concrete conveyor vehicle in the form of a belt conveyor vehicle 66 is shown. The boom arm 67 mounted via the turntable 19 comprises a plurality of boom arm segments 71 which can be moved telescopically between a retracted state and an extended state. A first belt conveyor 73 extends along the boom arm 67 from a proximal End 75 to a distal end 76. At the distal end 76, an end hose 69 is attached, through which material conveyed by the first belt conveyor 73 is discharged. The material can be, for example, liquid concrete, another thick material, or a bulk material. The belt conveyor vehicle 66 comprises a second belt conveyor 68, via which material that has been filled into the pre-filling container 60 is fed to the proximal end 75 of the first belt conveyor 73.

Claims

Patent claims 1. A concrete conveyor vehicle comprising a frame (26), an extendable boom arm (18, 67) and a control cabinet (23), wherein the frame (26) supports the boom arm (18, 67), wherein the concrete conveyor vehicle is designed to convey liquid concrete along the boom arm (18, 67) such that the liquid concrete is discharged at a distal end (76) of the boom arm (18, 67), wherein the concrete conveyor vehicle (14, 66) is equipped with a first support leg (31, 33) and with a second support leg (32, 34), wherein the first support leg (31, 33) and the second support leg (32, 34) are attached to the frame, wherein the first support leg (31, 33) and the second support leg (32, 34) are arranged on one side of the concrete conveyor vehicle (14, 66), and wherein the first support leg (31, 33) and the second support leg (32, 34) are designed as pivoting legs, wherein the control cabinet is designed to send control commands to components (15, 18, 31, 32, 33, 34) of the concrete conveyor vehicle,wherein the concrete conveyor vehicle (14, 66) comprises a primary control unit (24) and a secondary control unit (25), wherein the primary control unit (24) is designed to communicate with the control cabinet (23) via a radio connection, wherein the secondary control unit (25) forms a structural unit spatially separate from the control cabinet (23), wherein the secondary control unit (25) is mounted in a lateral position on the concrete conveyor vehicle (14, 66), and wherein the secondary control unit (25) is arranged in a longitudinal position lying between the distal end (28) of the first support leg (31, 33) and the distal end (30) of the second support leg (32, 34).

2. Concrete conveyor vehicle according to claim 1, wherein the secondary operating unit (25) has a fixed position relative to the frame (26) so that the first support leg (31, 33) and the second support leg (32, 34) can be pivoted without the position of the secondary control unit (25) changing relative to the frame (26).

3. Concrete conveyor vehicle according to claim 1 or 2, wherein the secondary operating unit (25) is arranged in a vertical position so that the vertical extension (59) of the secondary operating unit (25) overlaps with the vertical extension (52) of the first pivot joint (41).

4. Concrete conveyor vehicle according to one of claims 1 to 3, wherein the joint axis (43) of the first pivot joint (41) is arranged in a different longitudinal position than the joint axis (44) of the second pivot joint (42).

5. Concrete conveyor vehicle according to claim 4, wherein the secondary operating unit (25) is arranged in a longitudinal position which lies between the longitudinal position of the first pivot joint (41) and the longitudinal position of the second pivot joint (42).

6. Concrete conveyor vehicle according to one of claims 1 to 4, wherein the secondary operating unit (25) is arranged in a longitudinal position so that the horizontal extension (60) of the secondary operating unit (25) overlaps with the horizontal extension (61) of the first pivot joint (41).

7. Concrete conveyor vehicle according to one of claims 1 to 6, wherein the first pivot joint (41) has a recess (63) which receives the secondary operating unit (25).

8. Concrete conveyor vehicle according to one of claims 1 to 7, wherein the secondary operating unit (25) is arranged so that there is an overlap between the horizontal position the joint axis (43) of the first swivel joint (41) and the horizontal extension (60) of the first operating unit (25).

9. Concrete conveyor vehicle according to claim 7 or 8, wherein the second pivot joint (42) has a recess (64) which receives the secondary operating unit (25).

10. Concrete conveyor vehicle according to one of claims 1 to 8, wherein the first pivot joint (41) has a two-part pivot pin (49).

11. Concrete conveyor vehicle according to one of claims 1 to 10, wherein the joint axis (55) of the first pivot joint (41) is coaxial with the joint axis (55) of the second pivot joint (42).

12. Concrete conveyor vehicle according to claim 1, wherein the secondary operating unit (25) is attached to the first support leg (31).

13. Concrete conveyor vehicle according to claim 12, wherein the secondary operating unit (25) is attached to a proximal pivot leg box (36) of the first support leg (31).

14. Concrete conveyor vehicle according to one of claims 1 to 13, wherein the concrete conveyor vehicle is designed as a concrete pump vehicle (14).

15. Concrete conveyor vehicle according to one of claims 1 to 13, wherein the concrete conveyor vehicle is designed as a belt conveyor vehicle (66).

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