DE3013450A1 - DISTRIBUTION POLE OF A CONCRETE PUMP - Google Patents

Abstract

1. A folding, transportable distributing mast, rotatable about a vertical axis, which carries a concrete conveying conduit (25) and which consists of several booms (A, B, C, D) jointed together, characterised in that the two booms (A, B, C, D) of each pair of jointed together booms are arranged adjacent one another in the area of the connecting joints (40, 41, 42) and the concrete conveying conduit (25) is conducted through the joint mountings in such a way that the two booms (A, B, C, D) exhibit two parallel vertical rotational planes, in which the booms can rotate without mutual interference.

Description

"Placing boom of a concrete pump"

The invention relates to the advantageous design of a multi-part Placing boom of a concrete pump for the purpose of reducing the overall height in the folded state, weight reduction and the Production simplification, in particular through the joint design provided in connection with the elements for the introduction of force and the bracket of the delivery line.

So far, the multi-section placing booms were built so that the Axes of symmetry of all links in the same vertical plane were DOS 19 29 401; DOS 20 18 500; DP 20 00 382; DOS 19 29 401; DOS 27 29 750; DOS 19 15 722. When folded, the individual lay Mast parts all on top of one another, the vertical distance usually being further increased by the hydraulic cylinders located between the mast parts was enlarged.

Now the market demands concrete placing booms with ever greater ranges. At the same time, however, the length of the vehicle or the front and rear protrusions of the placing booms cannot extend beyond the truck be enlarged. The demand for a larger funding range can therefore in the known and customary design, only the number of mast parts lying one above the other can be met. There are some difficulties here on, for example 3, 4 or 5 mast sections then have a construction height in the transport position of approx. 1.3 - 1.8 m. that the permissible transport height of 4 m may no longer be sufficient. Another negative characteristic is that the overall focus is higher when the boom is folded down and thus the transport speed, especially the cornering safety

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is impaired.

With the usual, so-called roll-down folding, are still the adjusting cylinder and reversing lever under the lower edge of the individual Cantilever protruding and there was often damage to these parts by getting caught on formwork parts or the Structure and deaths.

In addition, the mountings for the delivery pipes on the mast parts had to have different dimensions, which affects the manufacturing process and adversely affected the cost.

The various folding systems have specific disadvantages and advantages. Up to now placing booms for up-folding were in terms of their The bearing design is different from that for downward folding.

For example, the upward Z-fold makes a large maximum Jib dimension possible with a few jib parts, about 31 m with only 3 parts. At the same time, the overall focus is lower because the Α-mast is the heaviest at the bottom. The load distribution on 2 or 3 axles can be easily adjusted.

Rolling down requires the same reach (approx 31 m) more links (mast parts), so more hydraulics and control, d. H. Additional costs, but can be better adapted to certain structures with only a small horizontal range. The disadvantage is that the Overall center of gravity of the boom is far back and higher, conditionally in that the heaviest A-mast part comes to rest on top.

In order to eliminate all these negative features, the invention proposes to guide the individual boom parts one above the other in 2 levels. This means that considerable (approx. 40 %) overall height can be saved in the folded state.

The expensive cranks on each boom part, for those outside of the Cross-section lying joints, the previously common solutions, are omitted. All points of articulation lie in the system axis of the individual

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Mast parts, while 2 parts each in the folded state next to each other each boom part is cantilevered on the other.

The individual adjustment cylinders of the mast parts are between the Arranged longitudinal axes of the individual mast parts.

The cylinder and lever are in the extended state over the profiles, so that the underside of the individual mast parts smooth and is free and hanging on formwork, renovation and building parts is no longer possible.

At the end of the last part of the mast there is no circular segment-shaped guide more intended for the end distribution hose, but rather the delivery pipe ends horizontally on the opposite side of the pipeline on the boom. A rotatable elbow connects here, which takes the hose. In the Turning the horizontal axis of rotation, the end distribution hose always hangs perpendicular. This reduces the risk of accidents due to yielding.

The points of articulation are dimensioned so that the delivery pipeline can be passed through them.

This means that the pipe bearings are so large that bending and torsional forces can be easily picked up.

A passage of the delivery line through the joints in connection with the cantilevered mast parts lying next to each other in the collapsed state make it possible to use the delivery pipeline in the same place Maintain a distance from the respective mast part and in its system axis (X-axis). This means that all mounting points are the same.

Up to 5 or more mast sections are to be installed in this floating position. When folded, there are always 2 mast sections next to each other, with 4 mast sections 2 each next to each other and on top of each other.

This storage principle can be used for a folding of 3-5 mast sections. The total height is about 60 % of the previous solutions.

Since the total height of a mobile concrete pump is determined by the Construction height of the chassis and built-in pump parts and

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placing boom above it, it can be seen that with the same Base height of the pump with the embodiment according to the invention, the total height is lower. Since the Α-mast is on top, the overall center of gravity is when folded downwards upwards, but lower than with the mast sections that were previously folded on top of each other. This folding system is right for the shorter ranges with up to 4 mast sections. The storage principle can also be used for placing booms with upper Z-fold. This way of folding enables the permissible vehicle length to be used and the same with a smaller number of elements or to obtain greater ranges. The Α-mast is below and the The overall center of gravity of the boom on a mobile concrete pump is lower than when it is rolled down.

With the Z-fold only the swivel cylinder with lever parts is for mast part B at the end of A below, all other drive parts in the unfolded state again above. The bottom arrangement at the end Mast part A is not disturbing because this point rarely intervenes in the building area.

For designs with a Z-fold upwards, there is a favorable weight distribution on the vehicle axles easier to reach. When folding downwards, you may have to use a chassis with an enlarged Wheelbase to be gripped.

Another essential feature of the invention is the mounting of the Concrete delivery pipe can be seen on the mast parts. The bracket is designed in such a way that when quick-release pipe couplings are released, for example to remove pipes, the individual pipe sections are held elastically next to the pipe coupling in hinge-like bearing parts. This makes assembly and disassembly easier. Thanks to the elastic insert in the brackets, no impacts or constraining forces are transmitted into the supporting structure.

The pipe brackets are expediently built so that one with Shell half with rubber insert in horizontal boom position on the side lying below or facing the mast part by a second, hinged and also provided with a rubber insert Shell half is closed.

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The shell division does not need to be in the middle, but the fixed one Parts can, for example, have an angle of 180 - 220 °, the foldable less than 180 ° or 140 °.

So only 1 bracket is required at each joint of the delivery pipe, at which 2 adjacent conveyor pipes are held. When a pipe is dismantled, the neighboring one does not change its position.

The following figures show the placing boom according to the invention exemplary, namely:

In Fig. 1 a mobile concrete pump including placing boom with Roll folding down,

In Fig. 2 a mobile concrete pump including placing boom with Z-fold up.

3 shows the construction of a 3-section placing boom in side view,

The Fig. 4 in plan view, each in the version for roll folding downward.

5 shows the construction of a 3-section placing boom with an extended B and C part, in a side view;

Fig. 6 in plan view, each in the version for Z-folding upwards.

Finally show

7 shows the detail of the joint design between any two mast parts in plan view or in partial section.

Fig. 8 is a vertical section through a placing boom with 3 mast parts

and
9 shows a plan view of the conveyor pipe support along the mast divider.

According to FIGS. 1 and 2, the pump unit 2 is above the drive axles of the chassis 1 installed at an incline, with the requirement that the

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Filling edge of the hopper 3 as low as possible, its To keep the capacity as large as possible. The discharge line 4 runs either to the side or above the feed hopper to the placing boom, whose axis of rotation 8 should be as close as possible to the driver's cab for numerous reasons.

The subframe 6 of the pump, which is part of the support frame 5 of the placing boom, is anchored on the vehicle frame and the Outrigger supports 7 required in the operating position are on Support frame 5 stored, pivoted to the chassis for transport.

The fixed stand part 10 connected to the support frame 5 carries Via a rotating mechanism in the form of a bearing column or a ball rotary connection 11, the bearing head with main bearing 12 of the mast part A. The The placing boom can be rotated 360 ° around the axis 8 by means of the rotary drive 9.

Because the rear overhang of the vehicle's placing boom is limited is, the basic length of the mast part A is fixed. All of the following mast parts B, C, D can if the axis of the boom is in the extended state should form a straight line, only be shorter than mast part A. This means that a certain number of masts for an intended range is required.

The basic height ho of the pump unit, determined by the height of the hydraulic cylinder or the control on the feed hopper side, forms the lower limit for jib parts, while the upper limit is formed by the permissible transport dimensions.

If there are now 2 mast parts in the folded state at least partially next to each other, then according to the invention, almost double the number of mast parts, i.e. almost double that, can be at the remaining height Range.

The resulting overall center of gravity S, S1 of the folded boom has a strong influence on the choice of the chassis and its Wheelbase and vice versa. For example, if the overall center of gravity of the pump with boom is too far back, the driving and especially Maneuvering conditions impaired by the front axle relief or chassis with an extended wheelbase are required.

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Figs. 1 and 2 make this center of gravity of the boom in the Height and clear to the axes, for roll folding downwards (Fig. 1) and Z-fold up (Fig. 2).

The inventive design of a placing boom is for any Can be folded up.

The mast part A is rotated by 12, adjusted by hydraulic cylinder 13 by an angle C ^ -. This main adjusting cylinder is expediently effective as a pressure cylinder from below. Mast part B, C and others are each pivoted by β via hydraulic cylinders 14/15, angle lever / link combinations 16.

Only in the Z-FaIt method is the drive cylinder for the mast part B below, for all following mast parts, according to the invention, the same arrangement of the moving parts for both folding methods is on the Mast parts provided.

If the pivot points of the mast parts are now in the mast axis M, then cover them the mast parts are at least partially in the side view, as shown in phantom in Fig. 3.

It is not possible to completely cover two neighboring mast sections. because in each case the conveying pipe passed through the mast axis would come to rest on the underside of the neighboring part.

The hydraulic cylinders with angle levers and handlebars are shown in FIGS. 3 and 4 arranged on top of the mast parts and in a plane between the axes of the mast parts. This arrangement also applies to all other mast parts, which are not shown. The support frames sit in the company tunnel on top of the mast parts.

Hydraulic cylinders, angle levers and handlebars are only attached to masts A and B below for Z-folding upwards; all other moving parts of mast part C and other mast parts, not shown, are attached to the top again in the unfolded state. This results in a completely free and accident-protective lower edge of the mast parts removed from the vehicle.
According to the invention, the axis of the concrete delivery line lies with the M axis

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(X-axis) of the associated mast part in the same horizontal plane. The horizontal center distance is expedient for all mast sections kept the same so that uniform elements for the bracket can be reached.

On the last boom part, the concrete delivery line 25 is through the mast profile and ends in a pipe bend. 24, rotatable in a Rotary coupling 31, so that the subsequent elastic end distribution hose 29 always hangs vertically. If the end distribution hose or the connecting pipe bend gets stuck on the building, these swivel Distribute around the horizontal axis.

The horizontal distance of the end distribution hose 29 from the system axis M of the last mast part is approximately equal to the horizontal offset of the last two mast parts, so that the end distribution hose 29 on the top surface or at least part of the top surface within a hose guide 32 comes to rest.

A pivot point according to FIG. 7 consists of the bearing tube 17, which in each case is welded into the stronger mast part. The bearing tube has an end contact surface 19, on which the hub of the adjacent boom to Plant is coming. The weaker mast part is guided over the bearing bush 20 on the bearing tube and secured by a ring 21.

The bearing tube 17 is dimensioned so that the conveyor tube intermediate piece can be done easily. Expediently, one half of the shell coupling 22 is between the conveyor pipe intermediate piece and the pipe bend 24 elastically attached to the mast part.

A straight concrete delivery pipe 25 lying in the X-axis plane is next to it the elbow 24 held in a single bracket. This exists from a stationary shell part 26 which is adjustably attached to a pipe support 28. With the hinge-like and with a clamping lever Shell part 27 enables quick assembly and disassembly of the delivery pipes.

The shell parts carry elastic inserts 29, which exclude tension, thus ensure a closer closure of the coupling points

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and do not pass on shocks or noises.

The fixed shell bearing parts are according to the invention by means of elastic brackets 33 attached to the flastteil.

The plane E of the adjustment device lies between the mast part axes M, consisting of adjusting cylinder, angle lever and handlebar. At 18 are the bearing blocks are marked on the mast sections.

In Fig. 8, the implementation and mounting of the delivery line is through the bearing tubes 17 shown in vertical section. Here is also the bracket of the conveyor pipe 25 from a fixed Shell bearing part 26 with over 180 ° angle range in side view shown.

The end distribution hose 30 hanging from the last pipe bend 24 rotates in the rotary coupling 31 around a horizontal axis and, when folded, lies in a hose guide 32 on the adjacent mast part.

Depending on the mast section or conveyor pipe parts, slopes are placed along the mast sections similar brackets according to FIG. 9 attached. Only 1 pipe support 28 is required for each 2 holding shells 26/27. Such a holder enables quick assembly / disassembly of a pipe section piece, whereby the neighboring pipe section does not change its position.

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Position overview

1 truck chassis

2 pump unit

3 feeding hoppers

4 discharge line

5 support frame for outriggers

6 subframes

7 outrigger supports

8 placing boom rotation axis

9 Rotary boom drive

10 Fixed stand part

11 ball swivel connection

12 bearing head with main bearing mast A

13 Hydraulic cylinder, mast A

14 hydraulic cylinders for mast B

15 hydraulic cylinder for mast C

16 angle levers / handlebars

17 bearing tube

18 bearing blocks

19 contact surface

20 bearing bush

21 Backup

22 Clamp coupling lower part

23 Shell coupling upper part

24 elbows

25 Concrete delivery pipe

26 shell bearing part fixed

27 Movable shell bearing part

28 tubular supports

29 Elastic insert

30 End distribution hose

31 Rotary coupling

32 Hose guide

33 Elast. bracket

L max. Total length d. Vehicle with roll folding

L1 max. Total length d. Vehicle with Z-fold

S The center of gravity of the placing boom with roll folding

ST center of gravity of the placing boom with Z-folding

ho basic pump height h1 cantilever height roll folding h2 cantilever height Z-fold H total height of roll folding downwards H1 total height of Z-folding upwards

A = 1st mast part B = 2nd mast part C = 3rd mast part D = 4th mast part M = central axis mast parts E = vertical plane of the swivel parts O ^ - = swivel angle vertical dimension A β = swivel angle mast B / C / DF = Large piston area f = small piston area

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Claims (9)

STETTER GMBH MEMMINGEN 8940 Memmingen, March 28, 1980 New World 2 Patent and utility model registration Protection claims (\.) Distribution boom of a concrete pump, consisting of several foldable mast parts, which uir a vertical axis can be rotated 360 °, characterized in that one mast part is cantilevered on another, consisting of the adjustment devices from hydraulic cylinder (14/15), if necessary Angle lever (16) and handlebar, between the axes (M) of the mast parts and in the operating state are essentially above the mast parts and the concrete delivery pipe (25) is passed through the bearing (17). 2. placing boom according to claim 1, characterized in that the bearing axes each lie in the central axis (M) of a mast part and the bearing blocks (18) of the adjustment device are arranged on top of the mast section profiles in the horizontal operating state. 3. placing boom according to claim 1, characterized in that the conveyor pipe attachment via elastic links to the mast part he follows. 4. placing boom according to claim 1, characterized in that this mast optionally in roll folding up or down or 'in Z-Fold can be folded up or down. 130041/0738 5. placing boom according to claim 1, characterized in that the end distribution hose (30) is suspended from a pipe bend (24) which can be rotated about a horizontal axis in a rotary coupling (31) and is deposited in the guide part (32) or parts on the adjacent boom part. 6. placing boom according to the preceding claims, characterized in that that the center of the piping in the plane of the X-axis of the mast parts (M) and the horizontal spacing of the piping is the same over the entire length of one part of the mast. 7. placing boom according to the preceding claims, characterized in that that the conveyor pipe parts (25) on both sides of the coupling point via elastic Brackets with quick connection (26/27/29) to the mast parts are connected. 8. placing boom according to claim 7, characterized in that the tube holder is designed like a hinge and with elastic Insert (29) is provided. 9. distribution box according to the preceding claims, characterized in that that . the shell coupling lower parts (22) of the pipe couplings between Pipe bend (24) and conveyor pipe part are fixed piece by elastic elements (33) on the mast parts. 130041/0738 -3-