DE102015104139A1 - Turntable for a large manipulator - Google Patents

Abstract

The invention relates to a turntable (3) for vertical and horizontal pivoting of a mast arm (2) of a large manipulator (1) relative to a base frame (4), comprising: - a substantially circular gland plate (21) rotatably mounted relative to the base frame (4) for horizontal pivoting of the mast arm, and - two vertically arranged on the Verschraubungsplatte (21) spaced from each other web plates (22, 23), between the inner sides of the mast arm (2) is mounted vertically pivotable. The weight of the bogie (3) should be as small as possible to save costs and to keep the overall weight of the large manipulator (1) within the legal limits. At the same time, the fifth wheel should reliably withstand the loads occurring during pivoting of the mast arm (2). The turntable according to the invention is characterized by - two cylindrically shaped, vertically on the Verschraubungsplatte (21) on the outer sides of the web plates (22, 23) arranged and the web plates (22, 23) supporting jacket plates (24, 25) and - two level, respectively a circular segment forming cover plates (26, 27) each having a straight and a substantially semicircular edge, wherein the respective straight edge of the cover plates (26, 27) with the outer sides of the web plates (22, 23) and the respective semicircular edge of the cover plates ( 26, 27) is connected to the jacket plates (24, 25). In addition, the invention relates to a large manipulator with such a turntable (3).

Description

• – eine gegenüber dem Grundrahmen drehbar gelagerte, im Wesentlichen kreisförmige Verschraubungsplatte zum horizontalen Verschwenken des Mastarmes, und
• – zwei vertikal auf der Verschraubungsplatte, zueinander beabstandet angeordnete Stegbleche, zwischen deren Innenseiten der Mastarm vertikal verschwenkbar gelagert ist.

The invention relates to a turntable for vertical and horizontal pivoting of a mast arm of a large manipulator relative to a base frame, comprising:

• - A relative to the base frame rotatably mounted, substantially circular Verschraubungsplatte for horizontal pivoting of the mast arm, and
• - Two vertically on the Verschraubungsplatte, spaced apart web plates, between the inner sides of the mast arm is mounted vertically pivotable.

Furthermore, the invention relates to a large manipulator with a turntable according to the invention.

Large manipulators, e.g. Truck-mounted concrete pumps or distribution booms are typically equipped with a boom arm which is horizontally and vertically pivotable relative to a base frame to deploy concrete to a construction site. The concrete is fed by a truck mixer from a hopper to a concrete pump, which pumps the concrete via piping along the mast arm to the point of application.

For horizontal and vertical pivoting of the mast arm of the mast arm is pivotally connected via a turntable to the base frame, wherein the horizontal pivoting of the mast arm is typically carried out by means of a ball slewing. The horizontal pivoting is usually done by means of a hydraulic motor with a drive pinion that drives a connected to the ball slewing ring gear. The vertical pivoting takes place by means of one or more hydraulic cylinders which raise or lower the mast arm relative to the turntable. The distributor masts today conventional truck-mounted concrete pumps sometimes have a boom length of sixty meters and more, so that due to the large length and weight of the boom arm of the bogie is exposed to extremely large loads that are introduced via the ball slewing in the base frame. It should be noted that the distribution boom loads should be introduced via vertical standing or web plates in the circular ball slewing connection over the largest possible area. If the introduction of force into the bolting plate is too local, this can lead to failure of the weld seams and / or the ball slewing connection.

To the o.g. To meet demands, such turntables are usually elaborate and heavy steel welded constructions, which are often reinforced with bent, folded or three-dimensionally shaped steel reinforcing plates. These stiffening sheets, which may have a thickness of 10 mm and more, are very expensive to manufacture and increase the weight of the fifth wheel.

On the other hand, however, the weight of the fifth wheel should be as small as possible, because the total weight of a truck mounted concrete truck mounted on a truck chassis is subject to legal restrictions. In addition, it is cheaper to install less steel in the turntable.

It is an object of the present invention to provide a turntable for a large manipulator, which corresponds as best as possible to the requirements described above.

• – zwei zylindrisch geformte, vertikal auf der Verschraubungsplatte an den Außenseiten der Stegbleche angeordnete und die Stegbleche abstützende Mantelbleche aufweist, sowie
• – zwei ebene, jeweils ein Kreissegment bildende Deckbleche mit jeweils einer geraden und einer im Wesentlichen halbkreisförmigen Kante, wobei die jeweils gerade Kante der Deckbleche mit den Außenseiten der Stegbleche und die jeweils halbkreisförmige Kante der Deckbleche mit den Mantelblechen verbunden ist.

This object is achieved on the basis of a turntable of the type mentioned above in that this

• - Having two cylindrically shaped, vertically arranged on the Verschraubungsplatte on the outer sides of the web plates and the web plates supporting jacket sheets, and
• - Two flat, each forming a circle segment cover plates, each having a straight and a substantially semicircular edge, wherein the respective straight edge of the cover plates with the outer sides of the web plates and the respective semicircular edge of the cover plates is connected to the jacket plates.

The cylindrically shaped jacket plates and the flat, substantially semicircular cover plates are manufactured easily manufactured and the arrangement of these sheets is, with a low weight of the overall construction of the fifth wheel, very well to the forces of the mast arm or of the mast arm lifting hydraulic cylinder as possible evenly into the bolting plate and thus into the underlying ball slewing connection. Due to the construction according to the invention, the bolting plate is stiffened very effectively, which allows a uniform force transmission in the underlying ball slewing ring. The substantially semicircular edge (according to the invention also includes an edge with elliptical profile) of the cover plates may be connected to the cladding sheets in sections or over the entire length.

In a preferred embodiment of the invention, the height of the cylindrically shaped shrouds at the ends connecting them to the web plates is greater than in an intermediate section. In other words, the shrouds are pulled up towards their ends. By this measure, the web plates, optimally supported by the jacket plates with the lowest possible weight of the jacket plates.

The flat cover plates fall from the straight edge, with which they are arranged on the web plates, to the semicircular edge, with which they are connected to the jacket plates (eg welded), opposite the Verschraubungsplatte, ie to the outside, from. By this arrangement, the cover plates are on the one hand high side of the web plates arranged to stiffen the web plates laterally, on the other hand contribute to the cover plates to increase the transverse stiffness of the shrouds at. In a further embodiment of the invention, the web plates in the area below the cover plates on a cutout. The box-like structure of the shrouds in conjunction with the cover plates gives the turntable already a very high rigidity and thus the weight of the web plates can be reduced by cutouts in this area, without significantly reducing the rigidity of the fifth wheel.

According to a further embodiment of the invention, the cutouts in the web plates below the cover plates for Verschraubungsplatte are open, and the web plates are connected only in the front and rear with the Verschraubungsplatte. This measure results in a further reduction in weight without significantly reducing the rigidity of the fifth wheel.

At least one stiffening plate can be arranged between the web plates, which connects the web plates together, whereby the rigidity of the fifth wheel is increased in a simple manner.

At least one stiffening plate between the web plates is arranged on the outer circumference of the Verschraubungsplatte to increase the rigidity of the fifth wheel in the lower region.

Advantageously, a stiffening plate interconnecting the web plates is arranged in the region of bolt receiving eyes for supporting the mast arm between the web plates. A stiffening plate at this point increases the rigidity of the fifth wheel in the upper area.

In the web plates advantageously recesses are inserted in the area above the cover plates, which further reduce the weight of the fifth wheel, without significantly reducing the rigidity of the entire bogie.

With reference to the drawings embodiments of the invention will be explained below.

Show it:

1 : a large manipulator with a turntable according to the prior art;

2 a perspective view of a mast arm of a large manipulator with a turntable according to the invention;

3 a perspective view of the fifth wheel according to the invention;

4 a further perspective view of the fifth wheel according to the invention;

5 a side view of the fifth wheel according to the invention;

6 a plan view of the turntable according to the invention.

1 shows a big manipulator 1 in the form of a truck-mounted concrete pump with a turntable 3 according to the prior art. The truck-mounted concrete pump 1 has a base frame 4 on which a landing gear and a cab 10 are arranged. The truck-mounted concrete pump 1 comes with extendable supports 7 supported for concreting operation. On the base frame, below the mast arm 2 is a concrete pump, not shown, which is usually designed as a two-cylinder piston pump arranged.

The foldable, shown here in the folded state mast arm 2 who in 2 is shown in detail, is about a joint 14 with the turntable 3 connected and can by means of one on the fifth wheel 3 supported hydraulic cylinder 11 for concreting operation from the mast support 8th be lifted out. During the concreting operation the mast arm becomes 2 by means of the hydraulic cylinder 11 pivoted vertically.

The concrete pump is placed over the hopper 9 liquid concrete, for example, from a truck mixer, fed. The still liquid concrete is then from the concrete pump via a pipe, not shown, through the mast block 5 and the turntable 3 along the mast arm 2 pumped to the top of the mast and discharged via a not shown end hose at the desired application location.

Between the turntable 3 and the mast goat 5 is a ball slewing connection 6 arranged to the turntable 3 after the mast arm 2 from the pole rest 8th was lifted to pivot horizontally. For this purpose, for example, a drive with a hydraulic motor, a drive pinion and a ring gear, which is driven by the pinion provided. Other possibilities for the rotary drive, such as a direct drive or rack drive with hydraulic cylinders would be possible. To ensure a uniform distribution of the mast arm 2 in the turntable 3 introduced forces in the ball slewing connection 6 to reach, are located on the side of the turntable 3 in accordance with the prior art in 1 two substantially conical reinforcements 3a Apply the forces as evenly as possible to the outer circumference of the bottom of the fifth wheel 3 conduct.

2 shows the mast arm 2 who has a turntable 3 can be pivoted horizontally and vertically according to the invention. The masthead 2 consists of the visible here Mastarmsegmenten 12 . 13 . 39 and other, not visible mast segments. The mast segments 12 and 13 are straight and can by means of the hydraulic cylinder 18 and joint kinematics 15 be pivoted against each other. The pole segment 39 , by means of the hydraulic cylinder 19 and the deflecting gear 16 opposite the pole segment 13 can be pivoted, is provided with a setting, so that more mast segments laterally from the mast segments 12 and 13 can be arranged in the folded state, of which only one hydraulic cylinder 20 and a joint kinematics 17 are visible, followed by further mast segments.

In 3 is the turntable according to the invention 3 shown in a perspective view obliquely from above. The details of the components arranged on the right and left refer to the direction of travel of the truck-mounted concrete pump.

The turntable 3 consists of a bolting plate 21 on which a left web plate 22 and a right web plate 23 are arranged vertically. The components of the fifth wheel 3 are, unless otherwise stated, usually welded together. It would also be conceivable, however, to connect the components to one another by means of screw connections or other technologies, eg gluing. The turntable 3 is usually made of steel, but other materials, such as fiber reinforced plastics CFK or GRP, or combinations of these materials are possible. The web plates 22 . 23 each have an inside and an outside, the in 3 not shown first mast segment 12 of the mast arm 2 between the web plates 22 . 23 by means of at least one bolt connection in Bolzenaufnahmeaugen 28 . 29 is mounted vertically pivotable. The eyes 30 . 31 form the articulation points for the mast cylinder 11 with which the masthead 2 is raised and lowered. On the outsides of the web plates 22 . 23 are two cylindrically shaped, perpendicular to the gland plate 21 arranged jacket plates 24 . 25 the the bridge plates 22 . 23 support laterally. The jacket sheets 24 . 25 can also be arranged so that they are not laterally on the web plates 22 . 23 are welded and, as shown here, in the front and rear part of the web plates 22 . 23 on the screwing plate 21 protrudes, but that the shrouds 24 . 25 with the front and / or rear edges of the web plates 22 . 23 finish flush or in front of the web plates 22 . 23 on the circumference of the bolting plate 21 are arranged so that the shrouds 24 . 25 the web plates 22 . 23 enclose outside. Likewise, the jacket plates 24 . 25 in the front and / or rear of the fifth wheel 3 form a unit or even a closed tube with a straight bottom, which on the bolting plate 21 welded on and with the web plates 22 . 23 connected is.

The height of the jacket sheets 24 . 25 is greater at the ends where they connect to the web plates than in the of the web plates 22 . 23 more distant sections, ie in the lying between the ends sections to the lowest possible weight of the shrouds 24 . 25 the web plates 22 . 23 optimally supported laterally.

At the turntable 3 are also two flat, each forming a circle segment cover plates 26 . 27 arranged in each case with a straight and a substantially semicircular edge, wherein the respective straight edge of the cover plates 26 . 27 with the outsides of the web plates 22 . 23 , and the respective semicircular edge of the cover plates 26 . 27 with the jacket sheets 24 . 25 in sections or over the entire length is connected. The cover sheets 26 . 27 stabilize the construction of the fifth wheel 3 in the direction transverse to the cantilever level and give the turntable 3 a high torsional rigidity.

Regarding the use of the term "substantially semicircular" with respect to the cover sheets 26 . 27 be on 6 referenced, which shows that the web plates 22 . 23 not symmetrical on the turntable 3 must be arranged. Around the folded in masthead 2 as symmetrical as possible, ie in the middle of the truck-mounted concrete pump 1 To be able to lay down, it is necessary, the web plates 22 . 23 laterally offset from the centerline of the truck-mounted concrete pump 1 on the screwing plate 21 to arrange, resulting in a different size for the shrouds 24 . 25 yields and the cover sheets 26 . 27 each do not describe a full semicircle. Due to the oblique arrangement of the cover plates 26 . 27 on the jacket sheets 24 . 25 ie the cover sheets 26 . 27 are sloping from the straight edge to the semicircular edge opposite the bolting plate 21 arranged, these are also slightly elliptical.

Both the cylindrical jacket plates 24 . 25 as well as the flat cover sheets 26 . 27 are simple and inexpensive to manufacture and a complex and associated with inaccuracies edging of these sheets is omitted in this construction.

Between the insides of the web plates 22 . 23 are stiffening sheets 32 . 33 . 34 . 35 arranged the the web plates 22 . 23 connect together to achieve a high rigidity of the construction. The two stiffening sheets 32 . 33 are on the outer circumference of the bolting plate 21 arranged. These stiffening sheets 32 . 33 can, like the shrouds 24 . 25 , be cylindrical in shape or to simplify the construction of flat sheets. A flat stiffening sheet 34 is in the same height as the cover sheets 26 . 27 between the web plates 22 . 23 arranged. The stiffening sheet 35 is bent and in the upper area between the web plates 22 . 23 below the bolt receiving eyes 28 . 29 arranged. The stiffening sheets 32 . 33 . 34 . 35 are similarly shaped as the cladding sheets 24 . 25 that is, they are in the middle area between the web plates 22 . 23 relatively narrow, become the web plates 22 . 23 wider and run at the ends pointed to over as long as possible weld to the web plates 22 . 23 with the lowest possible weight of the stiffening plates 32 . 33 . 34 . 35 to ensure maximum stiffening and durability of the construction.

To reduce weight are in the web plates 22 . 23 two large recesses each 36a . 36b . 36c . 36d brought in. These recesses 36a . 36b . 36c . 36d can, as shown in the figures, as openings in the web plates 22 . 23 be designed or alternatively be cutouts, where a small thickness of the web plates 22 . 23 in the area of the recesses 36a . 36b . 36c . 36d preserved. To a slightly reduced rigidity of the construction due to the recesses 36a . 3b . 36c . 36d to compensate, is the stiffening sheet 35 above the recesses 36a . 36b attached close to the edges of the recesses.

In the side view of the fifth wheel 3 in 5 it is recognizable that the recesses 36b . 36d in the web plate 22 are arranged so that between them a bridge with sufficient width remains to those of the mast cylinder 11 over the eye 30 acting force F between the recesses 36b . 36d through in the lower part of the fifth wheel 3 pass through without the web plates 22 . 23 be severely deformed. The bridge between the cutouts 36b . 36d is so broad that even at different angular positions of the Mastarmsegmentes 12 a safe power transmission between the sections 36b . 36d can be done.

From the side view of the fifth wheel in 5 is also recognizable that the cover plate 26 to the rear side of the fifth wheel 3 along the bridge plate 22 is arranged sloping.

The openings 41 in the cover sheets 26 . 27 serve in this illustration the purpose of screwing below the cover plates 26 . 27 to make accessible. To reduce the weight of the cover sheets 26 . 27 These may also have larger recesses, much like the recesses 36a to 36d the web plates 22 . 23 be provided, for example, as centrally or eccentrically arranged, oval or round opening.

In 4 is a perspective view of the underside of the fifth wheel 3 shown. In this figure, it can be seen that the bolting plate 21 is designed substantially annular. In the annular screwing plate 21 are blind hole threads over the entire circumference 40 introduced, by means of which the fifth wheel 3 is bolted to the underlying ball slewing connection. In principle, bores could also be provided here, and the bolting plate would be screwed with nuts and bolts, as usual in the prior art, with the ball pivot connection. The use of the blind hole thread 40 but has the advantage that the top of the bolting plate 21 free for the arrangement of the web plates 22 . 23 and the jacket sheets 24 . 25 can be used. The welds for the welding of the web plates 22 . 23 and the jacket sheets 24 . 25 with the bolting plate 21 If possible, should not directly over one or more of the blind hole thread 40 run in order to achieve the greatest possible strength of the welded joint.

In the 4 is still to recognize that the web plate 23 in the area below the cover plate 26 a recess 38 has and that the web plate 22 only in the front and rear area to Verschraubungsplatte 21 pulled down and connected there with this. In those areas where the web plate 22 on the annular bolting plate 21 touch down, is the screwing plate 21 something widened designed. The recess 38 in the web plate 23 is in 4 not recognizable, but basically designed as well as the recess 38 in the web plate 22 , At the web plate 22 is in the area of the clipping 38 a tab 37 arranged with four holes on which, for example, a holder for the implementation of the concrete delivery line can be attached.

LIST OF REFERENCE NUMBERS

1

Concrete pump

2

mast arm

3

turntable

4

base frame

5

boom base

6

Ball slewing

7

support

8th

mast edition

9

hopper

10

driver's cab

11

mast cylinder

12

First mast segment

13

Second mast segment

14

Joint turntable / mast

15

first joint kinematics

16

second joint kinematics

17

third joint kinematics

18

hydraulic cylinders

19

hydraulic cylinders

20

hydraulic cylinders

21

Verschraubungsplatte

22

Bar sheet left

23

Web plate on the right

24

Sheath plate left

25

Sheath plate right

26

Cover plate left

27

Cover plate on the right

28

Stud receiving eye left

29

Bolt receiving eye on the right

30

Hydraulic cylinder eye left

31

Hydraulic cylinder eye right

32

rear jacket sheet

33

front jacket sheet

34

Reinforcement sheet below

35

Stiffening sheet above

36

recesses

37

pipe support

38

Cutting web plates

39

Third mast arm segment

40

Blind hole

41

Openings cover plates

Claims (11)

Turntable ( 3 ) for vertical and horizontal pivoting of a mast arm ( 2 ) of a large manipulator ( 1 ) compared to a base frame ( 4 ), comprising: - one opposite the base frame ( 4 ) rotatably mounted, substantially circular screw plate ( 21 ) for horizontal pivoting of the mast arm, - two vertically on the gland plate ( 21 ), mutually spaced web plates ( 22 . 23 ), between whose insides the mast arm ( 2 ) is mounted vertically pivotable, characterized by - two cylindrically shaped, vertically on the screwing plate ( 21 ) on the outsides of the web plates ( 22 . 23 ) and the web plates ( 22 . 23 ) supporting jacket sheets ( 24 . 25 ) and - two flat, each forming a circle segment cover plates ( 26 . 27 ) each having a straight and a substantially semicircular edge, wherein the respective straight edge of the cover plates ( 26 . 27 ) with the outsides of the web plates ( 22 . 23 ) and the respective semicircular edge of the cover sheets ( 26 . 27 ) with the jacket plates ( 24 . 25 ) connected is. Turntable ( 3 ) according to claim 1, characterized in that the height of the cylindrically shaped jacket plates ( 24 . 25 ) at the ends at which they to the web plates ( 22 . 23 ), is larger than in an intermediate section. Turntable ( 3 ) according to claim 2, characterized in that the cover plates ( 26 . 27 ) sloping from the straight edge to the semicircular edge opposite the bolting plate ( 21 ) are arranged. Turntable ( 3 ) according to one of the preceding claims, characterized in that the screwing plate ( 21 ) is formed substantially annular. Turntable ( 3 ) according to one of the preceding claims, characterized in that the web plates ( 22 . 23 ) in the area below the cover sheets ( 26 . 27 ) each have a section ( 38 ) exhibit. Turntable ( 3 ) according to claim 5, characterized in that the cutout ( 38 ) in the web plates ( 22 . 23 ) to the screwing plate ( 21 ) is open and the web plates ( 22 . 23 ) only in the front and rear areas with the screwing ( 21 ) are connected. Turntable ( 3 ) according to one of the preceding claims, characterized in that in the region between the web plates ( 22 . 23 ) at least one stiffening sheet ( 32 . 33 . 34 . 35 ) is arranged, that the web plates ( 22 . 23 ) connects to each other. Turntable ( 3 ) according to claim 7, characterized in that at least one stiffening sheet ( 32 . 33 ) between the web plates ( 22 . 23 ) on the outer circumference of the screwing plate ( 21 ) is arranged. Turntable ( 3 ) according to claim 7 or 8, characterized in that at least one stiffening sheet ( 35 ) the web plates ( 22 . 23 ) in the area of bolt receiving eyes ( 28 . 29 ) of the mast arm ( 2 ) connects to each other. Turntable ( 3 ) according to one of the preceding claims, characterized in that the web plates ( 22 . 23 ) at least one recess ( 36a . 36b ) above the cover sheets ( 26 . 27 ) exhibit. Grand manipulator, characterized by a turntable ( 3 ) according to one of claims 1 to 10.

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