EP1636444A1

EP1636444A1 - Mobile concrete pump with distributing boom

Info

Publication number: EP1636444A1
Application number: EP04739592A
Authority: EP
Inventors: Markus Wolfram; Dieter Alwes; Michael Clement; Bernhard Raschke
Original assignee: Putzmeister AG; Putzmeister Werk Maschinenfabrik GmbH
Current assignee: Putzmeister Engineering GmbH
Priority date: 2003-06-25
Filing date: 2004-06-04
Publication date: 2006-03-22
Also published as: CN1802480A; DE10328770A1; KR20060026064A; CN100436301C; US20060140783A1; WO2004113648A1; US7543851B2

Abstract

The invention relates to a mobile concrete pump comprising a body framework (14) mounted on the running gear (10) of a truck chassis (12), a tabernacle (22) that is arranged in the body framework (14) and that is rotatable about a vertical axis (20) and a concrete distributing boom (24) configured in the form of multi-element articulated boom (24). Said concrete distributing boom consisting, for example, of six elements, has a first boom arm (1) in a first articulation (A), which rotates with respect to the tabernacle (22), in addition to other boom arms (2 to 6) arranged in the articulations (B to F), which can rotate with respect to one another. In order to enable the use of a distributing boom with a longer reach, a trailer (32) having its own chassis (34) is provided, said trailer being connected to the running gear (10) by a coupling element (36) in the road traveling state. The trailer (32) has a carrier stool (40) rotatable about a vertical axis (38) for receiving an arm ensemble (42) that projects beyond the rear end of the running gear (10) in the road traveling state. The arm ensemble (42) consists of the second arm (2) extending in the extended position of the second articulation (B) with respect to the first boom arm (1) and the remaining boom arms (3 to 6) which are which are folded with respect to the second boom arm (2) and forms the coupling element (36) together with the first boom arm (1), whereby the vertical axes (20,38) of the tabernacle (22) and the carrier stool (40) are configured as free rotational axes of the coupling element (36) in the road traveling state while the second articulation (B) can be freely rotated about its pivotal axis.

Description

Mobile concrete pump with placing boom

description

The invention relates to a mobile concrete pump with a mounting frame mounted on a chassis of a truck chassis, which can be supported by lifting the chassis on a support, with a mast bracket arranged on the mounting frame and rotatable about a vertical axis, and a concrete distribution boom designed as a multi-part articulated mast, which is attached to one has the first articulated joint with a horizontal articulation axis with respect to the mast bracket first mast arm and further mast arms which can be pivoted relative to one another at articulated joints about horizontal articulation axes.

Concrete pumps of this type convey the concrete delivered by transport mixers to construction sites via the placing boom to a concreting point. The concrete pumps are usually mounted on multi-axle chassis with a continuous, rigid frame. Multi-axle heavy chassis with excessive axle loads are necessary for heavy vehicles with a total weight of over 24 1. They are only allowed to drive on public roads with a special permit and cannot use many lighter routes and bridges. Furthermore, in a self-propelled concrete pump of the type specified at the outset (EP-B-0038954), it is known to use the semitrailer of a semitrailer as a chassis for the concrete pump and the distributor boom. This allowed the reach of the placing boom to be increased while maintaining a prescribed weight limit for the entire semitrailer, without sacrificing stability despite the relatively light construction of the semitrailer. This was made possible by lifting the tractor with its weight of approx. 7 to 9 t from the ground and using it as ballast to stabilize the placing boom. However, are also here the road traffic regulations set limits to the length and height of the vehicle, which prevent further expansion of the range.

Proceeding from this, the object of the invention is to improve the known mobile concrete pumps of the type specified at the outset such that a significant increase in the range of the placing boom can be achieved while maintaining the permissible axle loads and structural heights in the driving state.

To achieve this object, the combination of features specified in claim 1 is proposed. Advantageous refinements and developments of the invention result from the dependent claims.

The solution according to the invention is primarily based on the idea that a trailer is provided which has its own undercarriage and can be connected to the chassis via a coupling member in the state of road travel. The trailer according to the invention has a support bracket that can be rotated about a vertical axis for receiving an arm bundle that protrudes beyond the rear end of the chassis in the state of road travel, which consists of the second mast arm that is unfolded relative to the first mast arm in the extended position of the second articulated joint and at least part of the the other, opposite the second mast arm in its retracted position, consists of mast arms and forms the coupling member together with the first mast arm. These measures significantly increase the range of the concrete placing boom, while at the same time the road length, vehicle height and axle load permitted by road traffic regulations are not exceeded in the state of road travel.

In order to be able to drive even relatively tight bends without collision despite the large length of the vehicle in the state of road travel, according to one preferred Embodiment of the invention proposed that the vertical axes of the mast bracket and the support frame in the state of road travel are designed as free axes of rotation of the coupling member. A further preferred embodiment of the invention provides that in the state of road travel, the first articulated joint between the mast bracket and the first mast arm is locked in its position on the mounting frame which points backwards against the direction of travel of the chassis, and the second articulated joint is freely pivotable about its articulated axis. This measure ensures that the chassis of the truck chassis and the undercarriage of the trailer have optimum contact with the ground both when driving over a crest and when driving through a trough. A further improvement in this regard is achieved in that the support frame can also be pivoted to a limited extent about an axis running transversely to the trailing axis. In addition, the subframe should be rotatable to a limited extent about the vertical axis of the trailer.

In principle, it is conceivable that the trailer can also be coupled to the chassis via a preferably telescopic drawbar. A further improvement in cornering is achieved in that the trailer is self-steering. The follower can have at least two preferably hydraulically coupled steering wheels. A further improvement is achieved in that the trailer has a steering device that is electronically coupled to a steering device of the chassis.

In order to be able to maneuver the trailer more easily in the uncoupled state, it is advantageous if it has a motorized wheel drive.

In the operating state, the arm package placed on the subframe's support frame is raised. For driving on the construction site, the arm package can be swiveled against the first mast arm and placed on the chassis. In this way, an arm configuration designed for construction site use is used, which, when folded, is too high for travel on public roads, but for travel on one delimited site is possible and permissible. In this way it is possible to use arm packs with a range of more than 70 m when in use and to transport them on the road. It is advantageous if the trailer can be moved or raised as ballast on the chassis in the uncoupled state. In this case, the trailer is an auxiliary function during transport and in the operating state. The pump unit with material feed container, which is connected on the outlet side to a conveyor line arranged on the articulated mast, is expediently located on the chassis frame on the chassis side.

In principle, however, it is possible for the pump unit with the material feed container to be arranged on the trailer and, in the operating state, to be connected on the output side to a delivery line arranged on the articulated mast.

The mast arms of the articulated mast are expediently connected to one another in a combined ZRZ or RZRZ fold. The articulated mast is at least four members, preferably six or seven members. In terms of control technology, the high number of links in the articulated mast only makes sense if the links in the operating state cannot be controlled individually, but with electronic support together in a cylinder coordinate system (cf. DE-B-4306127).

In the state of road travel, the arm assembly is advantageously bolted to the subframe's support frame. The follower is at least biaxial. Depending on the size of the arm package, it is advisable to use three- to six-axis followers.

The invention is explained in more detail below on the basis of the exemplary embodiments shown schematically in the drawing. Show it Figures 1a and b a mobile concrete pump with six-arm boom in the state of road travel and in the state of construction site travel.

1c shows a folding diagram of the articulated mast according to FIGS. 1a and b in the state of the construction site trip;

2a to I the mobile concrete pump according to Fig. 1a to c in the driving state and in different unfolding positions of the articulated mast;

3a and b show the concrete pump according to FIG. 1a with a slightly modified trailer in a side view and in a top view when cornering;

4a to c show three side views of mobile concrete pumps with five-arm, six-arm and seven-arm articulated mast;

5a and b show a side view of the mobile concrete pump according to FIG. 4b in the state of road travel and in the state of construction site travel;

5c shows a folding diagram of the articulated mast in the state of the construction site trip according to FIG. 5b;

6a and b show a side view of the mobile concrete pump according to FIG. 4c in the state of road travel and in the state of construction site travel;

6c shows a folding diagram of the articulated mast in the state of the construction site trip according to FIG. 6b;

7a and b show a side view of a mobile concrete pump with a seven-armed articulated mast modified in comparison with FIGS. 6a and b in the state of road travel and in the state of construction site travel; 7c shows a folding diagram of the seven-arm articulated mast in the state of the construction site trip according to FIG. 7b.

The mobile concrete pumps shown in the drawing have a mounting frame 14 which is mounted on a chassis 10 of a truck chassis 12 and can be supported with support arms 16 on a base 18 while lifting the chassis 10. The body frame comprises a mast bracket 22 which can be rotated about a vertical axis 20 of the chassis 10 and which carries a concrete placing boom 24 designed as a multi-section articulated mast. The articulated mast has a first mast arm 1 which can be pivoted on a first articulated joint A with a horizontal articulation axis with respect to the mast bracket 22 and further mast arms 2 to 6 or 2 to 7 which can be pivoted relative to one another at articulated joints B to F or B to G about horizontal articulation axes.

The chassis-side mounting frame 14 also carries a pump unit 26 designed as a two-cylinder thick matter pump, which works on the principle of a tandem pump and in each case the concrete column sucked in from a material feed container 28 in a suction stroke in a subsequent pressure stroke into one of a pressure pipe 30 and a plurality of Concrete delivery pipes presses existing concrete delivery line. The concrete is pumped to the desired concreting point via the delivery line, which is led through the rotatable mast bracket and laid with its concrete delivery pipes, not shown, parallel to the mast arms 1 to 6 or 1 to 7 and rigidly connected to these.

When driving, the mast arms must be folded up and positioned on the chassis so that a vehicle length and vehicle height prescribed by the road traffic regulations are not exceeded.

A special feature of the invention is that the mobile concrete pump in the state of road travel next to the carry the body frame the chassis 10 has a trailer 32, which has its own chassis 34 and which can be connected to the chassis 10 via a coupling member 36. The trailer has a support bracket 40 which can be rotated about a vertical axis 38 relative to the chassis of the trailer and on which an arm package 42 projecting beyond the rear end of the chassis 10 can be supported in the state of road travel. The arm assembly 42 consists of the second mast arm 2, which is unfolded in relation to the first mast arm 1 in the extended position of the second articulated joint B, and the other mast arms 3 to 6, which are in the retracted position in relation to the second mast arm 2 (FIGS. 1, 4b, 5) or 3 to 7 (FIGS. 4c, 6, 7) and together with the first mast arm 1 forms the coupling member 36 between the chassis 10 and the follower 32.

As can be seen in particular from FIG. 3b, the follower 32 is designed to be self-steering. In the exemplary embodiment shown, it has two hydraulically coupled steering wheels 50. The steering device of the trailer is expediently electronically coupled to a steering device of the chassis 10, so that a coordinated cornering is possible between the chassis 10 and the trailer 32 (FIG. 3b). A special feature of the invention is that the vertical axes 20 and 38 of the mast bracket 22 and the support frame 40 are designed as free axes of rotation of the coupling member 36 in the state of road travel. As indicated by the double arrow 44, the second articulation B can be freely pivoted about its articulation axis in the state of road travel. In addition, since the subframe 40 can be pivoted to a limited extent about an axis 46 running transversely to the longitudinal axis of the trailer, it is achieved that the chassis 10 of the truck chassis 12 and the chassis 34 of the trailer 32 also maintain an optimal ground alignment when driving over a crest and when driving through a trough , The first articulated joint A between the mast bracket 22 and the first mast arm 1 can be locked in its rearward-facing position against the direction of travel of the chassis. When uncoupled, the arm consisting of mast arms 2 to 6 or 2 to 7 can be Package 42 folded against the first mast arm 1 and placed alone on the chassis 10 (Fig. 1b, 5b, 6b and 7b). If the maximum vehicle height has already been reached in the state of road travel according to FIGS. 1a, 5a, 6a and 7a, after the arm package 42 has also been folded in, an excessively high vehicle height will result which is only permitted in the private construction site area (state the construction site trip).

In the operating state, care must be taken to ensure that the chassis with its support arms 16 is adequately supported. An improvement in this regard can be achieved in that the follower 32 can be moved or raised as ballast onto the chassis 10 in the uncoupled state.

In the exemplary embodiment shown in FIGS. 1a to c, the placing boom is equipped with six mast arms which form a ZRZ fold in the folded state: arms 1 to 3 and arms 3 to 6 correspond to a Z fold, while arms 2 , 3 and 4 are folded according to the principle of roll folding. In this exemplary embodiment, the follower 32 has three axes, the arm assembly 42 being bolted to the support frame 40 at points 48 in the state of road travel.

The sequence of figures 2a to 21 shows the sequence of the unfolding and folding up of the placing mast 24 from the state of the road trip (FIG. 2a) by loosening the arm package 42 from the trailer 32 (FIG. 2b), the support on the ground 18 ( Fig. 2c) and the subsequent positioning of the concrete placing boom 24 with end hose 31 in the concreting position (Fig. 2d to 2h). Following the concreting process, the mast arms 1 to 6 are folded together with the chassis 10 still lifted (FIGS. 2i to k) in order finally to move into the state of road travel with the chassis 10 lowered into the stretched position in the joint B between the first and second mast arms 1, 2 to be brought (Fig. 21). 4a to c show that a modular construction of the placing boom with relatively simple means using the same arm components enables a transition between a five-arm (FIG. 4a) and a six-arm (FIG. 4b) to a seven-arm (FIG. 4c) placing boom 24 is possible.

The starting point is the construction shown in FIG. 4a, consisting of a semi-trailer with a five-arm placing boom 24/5 for a range of approximately 60 m. The use of an articulated lorry when building a mobile concrete pump is the subject of EP-B-0038954.

If the arm package 42 shown in FIG. 4a is supplemented by an additional mast arm 1 ', the six-arm mast configuration shown in FIG. 4b is obtained, the arm package 42' of which, according to the invention, is supported on a three-axle trailer 32 in the state of road travel , The previous arms 1, 2, 3, etc. become the new arms 2 ', 3', 4 ', etc. In FIG. 4b, this is indicated by the arm markings 271, 372, 473, etc. The range of the placing boom 24 is increased by the additional arm 1 'to about 70 m.

If one folds the entire articulated mast according to FIG. 4b and turns it through 180 °, one obtains an arm package 42 ", which can be supplemented by a new mast arm 1". The arm 2 "in Fig. 4c uss compared to the arm 1 'in Fig. 4b geometrically adapted (bent). The previous arms 2', 3 ', 4' are now the arms 3", 4 ", 5". 4c this is indicated by the arm markings 3 271, 47372, etc. The six-arm arm package 42 "is supported on a five-axis trailer 32. In total, a seven-arm placing boom 24/7 with a range of approximately 80 m results in FIG. 4c. The folding scheme of the six-arm placing boom according to FIG. 4b can be found in FIG. 5c in addition to the representations in the state of road travel and construction site travel. The arms 1, 2 and 3 and the arms 4, 5 and 6 are folded there in a Z-like manner, while the arm groups 3, 4 and 5 are folded in the manner of a roll fold.

The seven-arm mast configurations shown in FIGS. 6a to c and 7a to c differ only in the type of folding of individual groups of mast arms:

Fig. 6c: arms 1, 2, 3 roll fold arms 2, 3, 4 Z-fold arms 3, 4, 5 roll fold

Arms 4, 5, 6, 7: Z-fold.

Fig. 7c: Arms 1, 2, 3: roll folding

Arms 2, 3, 4, 5: Z-fold

Arms 4, 5, 6: roll folding

Arms 5, 6, 7: Z-fold.

Reference is expressly made to the pivoting angles in the joints A to F or A to G, which are indicated in FIGS. 1c, 5c, 6c and 7c.

In summary, the following can be stated: The invention relates to a mobile concrete pump with a mounting frame 14 mounted on a chassis 10 of a truck chassis 12, with a mast bracket 22 arranged on the mounting frame 14 and rotatable about a vertical axis 20 and with a multi-section articulated mast Concrete placing boom 24. As an example, the six-section concrete placing mast 24 according to FIG. 1a has a first mast arm 1 which can be pivoted on a first articulated joint A with respect to the mast bracket 22 and further mast arms 2 to 6 which can be pivoted relative to one another at articulated joints B to F. To a distributor To be able to use mast with a long range, a trailer 32 with its own undercarriage 34 is provided, which is connected to the undercarriage 10 via a coupling member 36 in the state of road travel. The trailer 32 has a support stool 40 which can be rotated about a vertical axis 38 for receiving an arm package 42 which projects beyond the rear end of the chassis 10 when driving on the road. The arm assembly 42 consists of the second mast arm 2, which is unfolded relative to the first mast arm 1 in the extended position of the second articulated joint B, and the other mast arms 3 to 6, which are in their retracted position relative to the second mast arm 2, and together with the first mast arm 1 forms this Coupling member 36. The vertical axes 20, 38 of the mast bracket 22 and the support frame 40 are designed in the state of road travel as free axes of rotation of the coupling member 36, while the second articulated joint B is freely pivotable about its articulation axis.

Claims

claims

1. Mobile concrete pump with a mounting frame (14) mounted on a chassis (10) of a truck chassis (12) that can be supported by lifting the chassis on a surface, with one on the

Mounting frame (14) arranged around a vertical axis (20) rotatable mast bracket (22) and having a multi-section articulated boom (24) which has a first articulated arm (A) with a horizontal articulation axis pivotable relative to the mast bracket (22) (1) and further mast arms (2 to 7) which can be pivoted relative to one another at articulated joints (B to G) about horizontal articulations, characterized by a chassis (34) of its own, in the state of road travel, via a coupling member (36) with the chassis (10) connectable follower (32), which has a support arm (40) rotatable about a vertical axis (38) for receiving an arm assembly (42) projecting over the rear end of the chassis (10) in the state of road travel, which arm armature (42) consists of the opposite first mast arm (1) in the extended position of the second articulated joint (B), second mast arm (2) unfolded and at least a part of the others, relative to the second mast arm (2) mast arms (3 to 7) located in their folded position and which together with the first mast arm (1) forms the coupling member (36).

2. Mobile concrete pump according to claim 1, characterized in that the vertical axis (20, 36) of the mast bracket (22) and the support frame (40) are designed as free axes of rotation of the coupling member (36) in the state of road travel.

3. Mobile concrete pump according to claim 1 or 3, characterized in that in the state of road travel, the first articulated joint (A) between the mast bracket (22) and the first mast arm (1) in its opposite the direction of travel of the chassis (10) towards the rear is locked.

4. Mobile concrete pump according to one of claims 1 to 3, characterized in that the second articulated joint (B) in the state of

Road trip about its articulation axis is freely pivotable.

5. Mobile concrete pump according to one of claims 1 to 4, characterized in that the support frame (40) can be pivoted to a limited extent about an axis (46) extending transversely to the longitudinal axis of the trailer.

6. Mobile concrete pump according to one of claims 1 to 5, characterized in that the support frame (40) about the vertical axis (38) of the follower (32) is rotatable.

7. Mobile concrete pump according to one of claims 1 to 6, characterized in that the trailer (32) can be coupled to the chassis (10) via a preferably telescopic drawbar.

8. Mobile concrete pump according to one of claims 1 to 5, characterized in that the trailer (32) is self-steering.

9. Mobile concrete pump according to one of claims 1 to 6, characterized in that the follower (32) has at least two preferably hydraulically coupled steering wheels (50).

10. Mobile concrete pump according to claim 8, characterized in that the trailer (32) with a steering device of the chassis (10) electronically coupled steering device.

11. Mobile concrete pump according to one of claims 1 to 10, characterized in that the follower (32) has a motorized wheel drive.

12. Mobile concrete pump according to one of claims 1 to 11, characterized in that the trailer (32) in the decoupled state as ballast on the chassis (10) can be raised or raised.

13. Mobile concrete pump according to one of claims 1 to 12, characterized in that the follower (32) with a pump unit (26)

Material feed container (38) carries, which in the operating state can be connected on the output side to a delivery line arranged on the placing boom.

14. Mobile concrete pump according to one of claims 1 to 12, characterized in that the chassis-side mounting frame (14) carries a pump unit (26) with material feed container (28) which can be connected on the output side to a delivery line (30) arranged on the placing boom.

15. Mobile concrete pump according to one of claims 1 to 14, characterized in that the mast arms (1 to 7) of the placing boom (24) are connected to one another in a combined ZRZ or RZRZ folding.

16. Mobile concrete pump according to one of claims 1 to 15, characterized in that the placing boom (24) is at least four members, preferably six or seven members.

17. Mobile concrete pump according to one of claims 1 to 16, characterized in that the arm assembly (42) in the state of road travel is bolted to the subframe (40) of the trailer (32).

18. Mobile concrete pump according to one of claims 1 to 17, characterized in that an arm package consisting of all mast arms (1 to 7) can be supported to form a construction site driving state in the folded state on the chassis (10).

19. Mobile concrete pump according to one of claims 1 to 18, characterized in that the follower (32) is at least biaxial.

20. Mobile concrete pump according to claim 19, characterized in that the follower (32) is three- to five-axis.

21. Mobile concrete pump according to one of claims 1 to 20, characterized in that at least one of the other mast arms (6) rests in the state of road travel on the chassis-side mounting frame or on the first mast arm.

22. Mobile concrete pump according to claim 21, characterized in that in the state of road travel the last mast arm (6) of a six-arm concrete placing boom (24) from the arm assembly (42) in the direction

Chassis (10) is folded and rests on it together with the first mast arm (1).