EP4330493A1 - Segment de bras de flèche destiné à une pompe à béton - Google Patents

Segment de bras de flèche destiné à une pompe à béton

Info

Publication number
EP4330493A1
EP4330493A1 EP22724102.3A EP22724102A EP4330493A1 EP 4330493 A1 EP4330493 A1 EP 4330493A1 EP 22724102 A EP22724102 A EP 22724102A EP 4330493 A1 EP4330493 A1 EP 4330493A1
Authority
EP
European Patent Office
Prior art keywords
arm segment
chord
mast arm
transition piece
lower chord
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22724102.3A
Other languages
German (de)
English (en)
Inventor
Ansgar MÜLLER
Benjamin RAU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Putzmeister Engineering GmbH
Original Assignee
Putzmeister Engineering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Putzmeister Engineering GmbH filed Critical Putzmeister Engineering GmbH
Publication of EP4330493A1 publication Critical patent/EP4330493A1/fr
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms

Definitions

  • the invention relates to a mast arm segment for a concrete pump.
  • a concrete pump mast arm is usually composed of a plurality of mast arm segments, with the sum of the mast arm segments making up the length of the mast arm in an unfolded state, and the mast arm segments forming a compact unit when folded are folded for ease of transport.
  • Mast arm segments are known, for example, from publications CN 205 036 090 U and CN 110 984 578 B.
  • Concrete pumps normally deliver the liquid concrete in spurts, so that the boom arms are exposed to considerable dynamic loads.
  • the boom arm segments can be folded differently when the concrete pump is in operation, depending on the distance at which the liquid concrete is to be discharged from the concrete pump. This means that the tensile and compressive loads on a mast arm segment act in very different directions, depending on the operating state of the mast arm. For these reasons, boom arm segments of a concrete pump are exposed to special loads during operation.
  • the object of the invention is to present a concrete pump boom arm segment that is lightweight and inexpensive to manufacture. Based on the prior art mentioned, the task is solved with the features of the independent claims. Advantageous embodiments are specified in the dependent claims.
  • the mast arm segment comprises an upper chord, a lower chord and two side parts connecting the upper chord and the lower chord.
  • the mast arm segment includes a pivot joint that defines a pivot axis for a pivotal connection between the mast arm segment and an adjacent structure.
  • the pivot axis is located below the plane of the bottom chord.
  • a transition piece extends between the lower chord and the joint connection.
  • a first connection is formed between the transition piece and the lower flange. The first connection is spaced from the end of the bottom chord. This information relates to the end of the lower chord that is adjacent to the transition piece, i.e. the nearest end; the transition piece is also at a distance from the opposite end of the lower chord.
  • the transition piece is sandwiched between a first reinforcement portion and a second reinforcement portion laterally adjacent to the transition piece.
  • the reinforcement pieces each have a bottom edge that extends from the hinge joint to the bottom chord.
  • the bottom edges enclose an angle with the plane of the bottom chord that is less than the angle that the transition piece makes with the plane of the bottom chord.
  • the invention has recognized that with the transition piece between the bottom flange and the articulated connection, a particularly favorable possibility is created of directing the forces acting in the area of the articulated connection into the boom arm segment.
  • the transition is arranged at a distance from the end of the lower chord.
  • the lower chord can extend along a straight line in the direction of an opposite end of the mast arm segment (longitudinal direction).
  • the end of the mast arm segment that is adjacent to the joint connection can be the proximal end.
  • the plane of the bottom chord is defined by the longitudinal direction of the bottom chord and the dimension parallel to the pivot axis of the articulated joint. If the lower chord does not extend over the entire length of the mast arm in one plane, the plane of the lower chord is defined by a section of the lower chord adjacent to the joint connection.
  • the bottom chord also extends transversely in the plane of the bottom chord.
  • the lower chord has a shape extending out of the plane of the lower chord in the transverse direction.
  • the lower chord can have one or more bends or be provided with one or more bevels.
  • the direction of the edges/bends may be parallel to the longitudinal direction of the mast arm segment, resulting in an out-of-plane shape in the transverse direction.
  • the lower chord can have a shape that is curved in the transverse direction, for example by the lower chord being folded in such a way that the sum of the folded edges corresponds to a curvature.
  • the bulge may be oriented such that the distance between the pivot axis of the hinge joint and a central portion of the lower chord is less than that Distance between the pivot axis and a peripheral area of the bottom chord.
  • the plane of the bottom chord is defined by the area of the bottom chord that has the smallest distance to the joint connection.
  • this longitudinal direction is straight, that is to say it does not lead out of the plane of the lower chord in the longitudinal direction. If there is no overlap between the level of the lower chord and the articulation connection, a direct connection between the lower chord and the articulation connection arranged below the level of the lower chord is not possible. With the invention it is proposed to create this connection through a transition piece. Although this means that - in comparison to constructions in which the articulated connection can be connected directly to the lower chord - an additional component has to be processed and additional work steps are required in the manufacture of the mast arm segment, the solution has proven to be advantageous overall .
  • the mast arm segment is designed to be pivotally connected to an adjacent structure via a pivot joint.
  • the adjacent structure can be another segment of the boom arm or a base frame of the concrete pump.
  • the pivot joint is formed by a first joint connection which is a member of the mast arm segment and a second joint connection which is a member of the adjacent structure separate from the mast arm segment.
  • the position of the swivel axis is defined by the joint connection of the mast arm segment.
  • the pivot port may include a pivot bore, the axis of the pivot bore corresponding to the pivot axis.
  • the articulation port may include structure within which the articulation bore is formed.
  • the articulation connection can be a piece of pipe, within which the articulation bore extends.
  • the joint connection can form a receptacle for a joint pin.
  • the transition piece Starting from the first connection, via which the transition piece is connected to the lower chord, the transition piece extends obliquely downwards in the direction of the joint connection. In this way, the transition piece encloses an angle with the plane of the bottom chord.
  • the transition piece can enclose an angle between 5° and 50°, preferably between 10° and 40°, with the plane of the lower chord. Angles outside of this range are less favorable for the power transmission between the bottom flange and the joint connection.
  • the transition piece can extend along a straight line between the bottom chord and the hinge joint. Transversely, the transition piece can also be straight, so that the transition piece has an overall planar shape. Alternatively, the bottom chord can have one or more bends or be provided with one or more folds. The direction of the edges/bends may be parallel to the longitudinal direction, resulting in an out-of-plane shape in the transverse direction.
  • the transition piece can have a shape that is arched in the transverse direction, for example in that the bottom chord is folded in such a way that the sum of the folded edges corresponds to a curvature. In the lateral dimension, the transition piece can extend over the entire width of the lower chord that the lower chord has in this section.
  • a second connection can be formed between the transition piece and the joint connection.
  • the distance between the second connection and the plane of the bottom chord may be greater than the distance between the pivot axis and the plane of the bottom chord.
  • the transition piece can also be arranged in such a way that there is no direct connection between the transition piece and the joint connection.
  • the transition piece can comprise a section which is arranged underneath the articulation connection. Sufficient force transmission between the transition piece and the joint connection can be ensured, for example, by arranging both the transition piece and the joint connection between two reinforcement parts, so that the transmission of force between the joint connection and the transition piece takes place through the reinforcement parts.
  • the transition piece connects to an end plate that forms a connection to the upper chord at the end of the mast arm segment.
  • the transition piece can be made of sheet steel.
  • the transition piece can be welded to the bottom chord and/or to the articulated connection.
  • the transition piece can be designed in such a way that it is flush with the articulated connection and/or the lower chord over its entire width.
  • the welded connection to the articulated connection and/or the welded connection to the lower chord can extend over the entire width of the transition piece.
  • the distance between the pivot axis of the articulation joint and the plane of the bottom chord can be so great that the plane of the bottom chord does not intersect the joint bore of the articulation joint.
  • the distance between the pivot axis of the articulated connection and the plane of the lower chord can be so large that the plane of the lower chord does not intersect the structure of the articulated connection.
  • the mast arm segment includes a reinforcement member extending from the knuckle joint to the bottom chord.
  • the amplification part can extend beyond the lower chord into a side part of the mast arm segment.
  • the reinforcement part can be designed to transfer forces acting on the joint connection into the mast arm segment.
  • the reinforcement member includes a bottom edge that extends from the knuckle joint to the bottom chord. The bottom edge makes an angle with the plane of the bottom chord that is less than the angle that the transition piece makes with the plane of the bottom chord.
  • the difference in the angles can be, for example, between 2° and 20°, preferably between 5° and 10°.
  • the distance between the bottom edge of the reinforcing member and the plane of the bottom chord may be greater than the distance between the transition piece and the plane of the bottom chord. This can apply in particular to the area in which the transition piece is connected to the articulated connection. This can continue to apply over the entire length of the transition piece.
  • the transition piece can be welded to the reinforcement part over its length. A design in which the transition piece is at a distance from the lower edge of the reinforcement part has the advantage that the forces emanating from the joint connection can be distributed more evenly.
  • the transition piece is sandwiched between a first reinforcement portion and a second reinforcement portion that are laterally adjacent to the transition piece.
  • the reinforcement members may also sandwich the hinge joint and/or a portion of the lower chord. Both reinforcement parts can have the aforementioned features.
  • the end of the bottom chord may be trapped between the reinforcement members.
  • the end of the bottom chord can be spaced from an edge of the amplification part, which is an extension of the bottom chord.
  • connection between the transition piece and the lower chord is at a distance from the end of the lower chord, ie there is a section of the transition piece which is arranged below the lower chord.
  • the section of the transition piece arranged below the lower chord can make up at least 5%, preferably at least 10%, more preferably at least 30% of the length of the transition piece.
  • This specification refers to the area of the lower chord in which the proximal end of the lower chord has the greatest distance to the transition with the transition piece. This can be a lateral area of the lower flange, with which the lower flange ends in the reinforcement parts.
  • a central area of the lower chord can be cut out and set back. The set-back area is preferably also at a distance from the connection between the transition piece and the lower chord.
  • transition piece is particularly useful when the side parts of the mast arm segment are bent inwards. It is then possible to connect the two reinforcement parts, which enclose the transition piece between them, to the side parts as described below.
  • the side part of the mast arm segment can have a bevel so that a central section of the side part is offset laterally inwards relative to an edge section of the side part. Between the edge portion and the center portion there may be a transition portion which provides a connection between the edge portion and the center portion forms.
  • the reinforcement part can have a material thickness that bridges the lateral offset between the edge section and the central section.
  • the reinforcing member may be butt-joined to the transition section.
  • a direct connection between the reinforcement part and the side part can also be created in the areas of the edge section and the central section adjoining the transition section.
  • the connection between the side part and the reinforcement part can be configured as a welded connection.
  • the welded joint may be butt-joined over the entire length of the joint between the reinforcement part and the side part, so that an end face of the reinforcement part is welded to an end face of the side part. It is also possible for the welded connection to include butt-welded and overlap-welded sections.
  • the butt welded portions of the weld joint may include the connection to the transition portion of the side panel as well as other portions.
  • the reinforcement member is butt-joined to the edge portion of the side panel and lap-joined to the central portion of the side panel.
  • the edge section of the side part can adjoin the upper chord or the lower chord of the mast arm segment.
  • the reinforcement member may be connected to the central portion of the side member by a weld seam extending along a portion of a peripheral edge of the reinforcement member.
  • the side panel may be configured to include an upper edge portion that adjoins the upper chord and a lower edge portion that abuts the lower chord.
  • the reinforcing member may be dimensioned to mate with both the transition portion between the central portion and the upper edge portion as well as with the transitional portion between tween the central portion and the lower edge portion is connected to butt.
  • the reinforcing member may be butt-joined to both the upper edge portion and the lower edge portion.
  • the reinforcement part can be in an overlapping connection with the central section. An upper end of the reinforcement part may terminate in the upper edge portion.
  • the reinforcement piece may include an end portion that terminates within the side piece.
  • the end area can end in the form of a taper in the side part.
  • the end area can overlap with the side part.
  • the tip of the end portion may terminate in the central portion of the side piece.
  • the outermost point of the end area is referred to as the tip, regardless of whether the end area tapers to a point there or has a different shape, for example rounded.
  • the tip of the butt can be located close to the neutral line of the mast arm segment, which means that the distance between the tip of the butt and the nearest girth is increased by at least a factor of 2, preferably by a factor of 3, more preferably by a factor of 5 is greater than the distance between the tip and the neutral axis.
  • the joint connection can form a proximal joint receptacle of the mast arm segment.
  • a receptacle for a hinge pin can be formed in the reinforcement part.
  • An articulated lever, to which a hydraulic cylinder can be connected, can be connected to the reinforcement part.
  • the hydraulic cylinder has the function of pivoting the mast arm segment relative to an adjacent structure, in particular relative to a neigh disclosed mast arm segment.
  • the articulated lever can be connected to the reinforcement part via a pivot connection.
  • the mast arm segment can include a mounting seat for a holder of a conveyor line.
  • the attachment receptacle can extend transversely through the mast arm segment and form a transverse connection between the opposite side parts of the mast arm segment.
  • the mounting bracket can be welded to each of the side panels.
  • the attachment receptacle may extend between the central portions of the opposite side pieces. In this way, the attachment receptacle can offer additional protection against the side parts of the mast arm segment deviating to the side under load. Due to the connection with the side parts, the forces exerted by the fastening elements can be easily directed into the side parts.
  • the attachment mount can protrude from the side panel.
  • the mounting receptacle can be designed in such a way that a holder for the delivery line can be connected.
  • blind holes can be provided for a screw connection.
  • the holder it is also possible for the holder to be welded to the fastening mount, for example.
  • the mast arm segment comprises a holder, connected to the fastening receptacle, for a conveyor line and/or a conveyor line connected to the fastening receptacle.
  • hydraulic lines can be connected to the mast arm segment via which, for example, hydraulic devices for folding and unfolding the mast arm can be operated.
  • the mast arm segment can include a plurality of such attachment receptacles, in particular at least two attachment receptacles, preferably at least three attachment receptacles, more preferably at least four attachment receptacles.
  • the attachment mounts can be distributed essentially equally be over the length of the mast arm segment.
  • One or more of the mounting brackets may be connected to a reinforcement member.
  • the delivery line can extend over the length of the mast arm segment.
  • the conveying line may comprise at one or both of its ends a joint part which is designed to form a pivotable connection to a conveying line of an adjacent boom arm segment.
  • the pivot axis defined with the Ge steering part can be coaxial with the pivot axis of the joint connection and thus coaxial with the axis of the mast arm pivot joint.
  • the conveying line can be arranged to the side of the boom arm segment.
  • the invention also relates to a concrete pump boom arm having a plurality of boom arm segments, at least one of the boom arm segments being designed according to the invention.
  • a swivel joint is formed between each two adjacent boom arm segments.
  • the axis of the pivot joint may be oriented to extend through both side portions of the mast arm segment, with the two side portions preferably being cut perpendicularly or at an angle of less than 10°, preferably less than 5°, with that direction.
  • the belt surfaces can extend parallel to the pivot axis.
  • the linkage may include a first linkage pivotally attached to a first mast arm segment.
  • the joint may include a second link lever pivotally attached to the second mast arm segment and also pivotally attached to the first link lever.
  • a hydraulic cylinder can extend from the first mast arm segment to the first articulated lever, so that a lifting movement of the hydraulic cylinder is translated into a pivoting movement between the mast arm segments. Seen from the first mast arm segment, the hydraulic cylinder is attached to the first articulated lever, preferably beyond the second articulated lever.
  • the concrete pump boom arm can include a conveying line for a thick material, in particular fresh concrete, which extends along the boom arm.
  • a segment of the conveying line can be assigned to each segment of the boom arm. Neighboring segments of the conveying line can be connected to one another via a joint, with the joint axis preferably being coaxial with the joint with which the associated boom arm segments are connected to one another.
  • the individual segment of the conveyor line can be designed as a rigid pipeline.
  • Fig. 1 a concrete pump vehicle with a mast arm in the folded state
  • Fig. 2 the concrete pump vehicle from Fig. 1 with unfolded
  • FIG. 4 a joint between two mast arm segments;
  • FIG. 5 shows the proximal end of the mast arm segment from FIG. 3 in an enlarged view;
  • FIG. 6 shows a detail from the mast arm segment from FIG. 3 in an enlarged representation
  • FIG. 7 the distal end of the mast arm segment from FIG. 3 in an enlarged view
  • Fig. 8 a mounting seat of the mast arm segment
  • Fig. 9 the fastening receptacle from Fig. 8 in another
  • FIG. 10 the proximal end of the mast arm segment from FIG. 5 in a perspective view
  • FIG. 11 the distal end of the mast arm segment from FIG. 7 in a perspective view
  • Fig. 12 is a cross section along line A-A in Fig. 5;
  • FIG. 13 an oblique view from below of the proximal end of the mast arm segment from FIG. 5;
  • FIG. 14 the mast arm end from FIG. 13 without a lateral reinforcement part
  • FIG. 15 the end of the mast arm from FIG. 13 in a view from below;
  • FIG. 16 the end of the mast arm from FIG. 14 in an oblique view from below.
  • a truck 14 shown in FIG. 1 is equipped with a concrete pump 15 which conveys liquid concrete from a hopper 16 through a delivery line 17 .
  • the conveyor line 17 he stretches along a mast arm 18 which is rotatably mounted on a slewing ring 19.
  • the mast arm 18 comprises three mast arm segments 20, 21, 22 which are articulated to one another. By pivoting the mast arm segments 20, 21, 22 relative to one another via the joints, the mast arm 18 can switch 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 discharged in an area remote from the concrete pump 15 .
  • the loads act on the mast arm segments 20, 21, 22 in very different directions.
  • the mast arm is exposed to high dynamic loads due to the intermittent conveyance of the liquid concrete.
  • the swivel joints between the mast arm segments 20, 21, 22 are designed in such a way that they allow a large swivel angle.
  • the mast arm segments are in the folded state
  • the joint construction is shown in FIG. 4 using the example of the swivel joint between the first mast arm segment 20 and the second mast arm segment 21 .
  • the pivot axis 74 is formed by a hinge pin 23 through which a proximal end of the mast arm segment 21 is connected to a distal end of the mast arm segment 20.
  • Adjacent to the pivot pin 23 on the first mast arm segment 20 is a first pivot lever 24 struck.
  • On the second mast arm segment 21 is neigh disclosed to the hinge pin 23, a second hinge lever 25 is beat.
  • the two articulated levers are articulated at 26 mitei nander.
  • a hydraulic cylinder 27 extends from a receptacle 28 on the first mast arm segment 20 to the outer end of the first articulated lever 24. Via the articulated levers 24, 25, a lifting movement of the hydraulic cylinder 27 is converted into a pivoting movement between the mast arm segments 20, 21 puts.
  • a mast arm segment 30 according to the invention shown in Fig. 3 extends from a proximal end 31 to a distal end 32.
  • the mast arm segment 30 is designed as a box-shaped profile with an upper chord 33, a lower chord 34 and two side parts 35, 36
  • the box-shaped profile of the mast arm segment tapers continuously from the proximal end 31 to the receptacle 28 for the hydraulic cylinder.
  • the two side parts 35, 36 and the upper chord 33 and the lower chord 34 thus approach each other with increasing distance from the proxima len end 31 to each other.
  • the mast arm segment 30 is reinforced with a first reinforcement part 40 which forms a proximal joint receptacle 57 of the mast arm segment 30 .
  • the box-shaped profile extends in the direction of the distal end 32.
  • the box-shaped profile is composed of an upper half-shell 41 and a lower half-shell 47, which are each designed as canted metal sheets.
  • each of the side parts 35, 36 has an upper edge section 42, which adjoins the upper flange 33, and a lower edge section 43, which adjoins the lower flange 34.
  • the upper edge sections 42 and the lower edge sections 43 lie in the same plane.
  • a central section 44 is arranged between the edge sections 42, 43 and has a lateral offset 56 relative to the edge sections 42, 43.
  • the side parts 35, 36 are bent inwards, so that the central sections 44 of the two side parts 35, 36 have a smaller distance from one another than the edge sections 42, 43 of the side parts 35, 36. Cut between the central section 44 and the edge 42, 43 are transition sections 45, 46aded det, each of which encloses an angle of approximately 30° with the plane of the edge sections 42, 43 or the plane of the central sections 44 parallel thereto.
  • the upper half-shell 41 includes the upper chord, the upper edge sections 42, the upper transition sections 45 and the upper part of the central sections 44 each of the two side parts 35, 36.
  • the lower half-shell 47 includes the lower chord 34, the lower edge sections 43, the lower transition sections 46 and the lower part of the central sections 44 from both side parts 35, 36, respectively.
  • the upper end of the lower half-shell 47 overlaps with the lower end of the upper half-shell 41 which the two half-shells 41, 47 are connected to each other.
  • the lower half-shell 47 is folded inward with its end edge 55 and forms there with a buckling stiffener for the box section.
  • the first reinforcement part 40 has a greater material thickness than the box profile made up of the half-shells 41, 47, see Fig.
  • the outside of the first reinforcement piece 40 coincides with the outside of the upper edge portions 42.
  • FIG. The inner side of the first reinforcement part 40 coincides with the outer side of the central portions 44 .
  • the transition sections 45, 46 the box profile changes between the outside and the inside of the first reinforcement part 40.
  • the transition sections 45, 46 and the edge sections 42, 43 are butt welded to the first reinforcement part 40.
  • the central portions 44 overlap with the first ampli kung part 40.
  • the connection between the first ampli kung part 40 and the central portions 44 is formed by a continuous weld around the first reinforcing part 40 around.
  • a hinge hole 37 is formed.
  • the hinge bore accommodates the Ge pivot pin 23 which connects the mast arm segment 30 to a neighboring mast arm segment.
  • the joint lever 25 can be connected.
  • the mast arm segment 30 comprises a further joint bore 37 near its distal end and a further stud 38 to which a joint lever 24 can be connected.
  • the mast arm segment 30 includes a further reinforcement part 50 which forms the receptacle 28 for the hydraulic cylinder.
  • the further reinforcement part 50 has the same material thickness as the first reinforcement part 40 and fits into the contour of the upper half-shell 41 in the same way.
  • the further reinforcement part 50 thus overlaps with the central sections 44 of the side parts 35, 36 and is connected there to the upper half-shell 41 by a circumferential weld seam.
  • the upper transition section 45 and the upper edge section 42 are butt welded to the further reinforcement part 50 .
  • the distal joint mount 51 shown in FIGS. 7 and 11 comprises a reinforcement plate 52 which is doubled onto the plate of the box profile.
  • the connection between the reinforcement plate 52 and the box section is formed by a circumferential weld seam which extends over the circumference of the reinforcement plate 52 .
  • the joint mount 51 includes a hinge bore 37 which receives the hinge pin 23 for the connec tion with an adjacent mast arm segment.
  • a stud 38 is arranged next to the joint bore 37, to which the joint lever 25 is connected.
  • the mast arm segment comprises a plurality of fastening receptacles 53 for attaching holders (not illustrated) for the conveying line 17.
  • a first fastening receptacle 53 is connected to the first reinforcement part 40.
  • two further mounting receptacles 53 are arranged.
  • a fourth mounting receptacle 53 is net angeord near the distal joint receptacle 51 .
  • the fastening receptacle 53 forms a cross connection 54 between the first side part 35 and the second side part 36.
  • the cross connection 54 is formed by a piece of pipe which is welded to the central sections 44 of both side parts 35,36. Since the side parts 35 , 36 are held at a fixed distance from one another by the pipe section 54 , the fastening mounts 53 counteract buckling of the mast arm segment 30 .
  • the tube piece 54 ends as a tube stub which protrudes slightly in relation to the central section 44 of the side part 35 .
  • the mounting bracket 53 is provided with four threaded holes to which the holder for the delivery line can be screwed.
  • the bottom chord 34 is formed by a metal sheet that is flat in the longitudinal direction and has an outwardly curved shape in the transverse direction due to four folds 60 .
  • the proximal end 61 of the lower chord is formed by two laterally tapering tips with an intermediate from rounded recess.
  • the side edges of the lower chord 34 are welded to the reinforcement parts 40, 70 up to the tips.
  • the proximal end 61 of the lower chord lies in the middle of the reinforcement parts 40, 70 and is therefore at a distance from the edge 75 of the reinforcement parts 40, 70, which is an extension of the lower chord 34.
  • the hinge bore 37 extends within a piece of pipe that the hinge connection 62 forms.
  • the pipe piece is arranged with its entire cross section below the plane 63 of the lower chord 34 so that no direct connection between the lower chord 34 and the articulated connection 62 is possible.
  • transition piece 64 which is in a connection 65 with the lower chord 34 and in a connection 66 with the joint connection 62 .
  • the connection 66 to the joint connection 62 is at a greater distance from the plane 63 of the lower chord than the pivot axis 74.
  • the transition piece 64 encloses an angle 67 of approximately 20° with the plane 63 of the lower chord. This angle 67 is slightly larger than the angle 68, which includes the lower edge 69 of the reinforcement part 40 with the plane 63 of the lower belt.
  • the distance 72 between the lower edge 69 of the reinforcing member 40 and the plane 63 is greater than the distance 71 between the transition piece 64 and the plane 63.
  • the distance 76 between the connection 66 to the Ge steering connection 62 and the plane 63 is greater than the distance 77 between the pivot axis 74 and the plane 63.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

L'invention concerne un segment de bras de flèche, comprenant une membrure supérieure (33), une membrure inférieure (34) et deux parties latérales (35, 36) reliant la membrure supérieure (33) et la membrure inférieure (34). Le segment de bras de flèche (30) comprend une liaison articulée (62) qui définit un axe de pivotement (74) pour une liaison pivot entre le segment de bras de flèche (21) et une structure adjacente (20). L'axe de pivotement (74) se trouve au-dessous du plan (63) de la membrure inférieure (34) ; une pièce de transition (64) est située entre la membrure inférieure (34) et la liaison articulée (62), et la liaison (65) entre la pièce de transition (64) et la membrure inférieure (34) est espacée de l'extrémité adjacente (61) de la membrure inférieure (34) ; la pièce de transition (64) est enfermée entre une première partie de renforcement (40) et une seconde partie de renforcement (70) qui est adjacente latéralement à la pièce de transition (64) ; les parties de renforcement (40, 70) ayant chacun un bord inférieur (69) qui s'étend de la liaison articulée (62) à la membrure inférieure (34) ; et les bords inférieurs (69) forment un angle (68) avec le plan (63) de la membrure inférieure (34) qui est plus petit que l'angle (67) auquel la pièce de transition (64) forme avec le plan (63) de la membrure inférieure (34).
EP22724102.3A 2021-04-28 2022-04-22 Segment de bras de flèche destiné à une pompe à béton Pending EP4330493A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21170838.3A EP4083345A1 (fr) 2021-04-28 2021-04-28 Segment de bras de mât pour une pompe à béton
PCT/EP2022/060664 WO2022229013A1 (fr) 2021-04-28 2022-04-22 Segment de bras de flèche destiné à une pompe à béton

Publications (1)

Publication Number Publication Date
EP4330493A1 true EP4330493A1 (fr) 2024-03-06

Family

ID=75728649

Family Applications (2)

Application Number Title Priority Date Filing Date
EP21170838.3A Withdrawn EP4083345A1 (fr) 2021-04-28 2021-04-28 Segment de bras de mât pour une pompe à béton
EP22724102.3A Pending EP4330493A1 (fr) 2021-04-28 2022-04-22 Segment de bras de flèche destiné à une pompe à béton

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP21170838.3A Withdrawn EP4083345A1 (fr) 2021-04-28 2021-04-28 Segment de bras de mât pour une pompe à béton

Country Status (4)

Country Link
EP (2) EP4083345A1 (fr)
KR (1) KR20230175250A (fr)
CN (1) CN117377806A (fr)
WO (1) WO2022229013A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205036090U (zh) * 2015-10-08 2016-02-17 三一汽车制造有限公司 油缸座结构及工程机械
CN207554068U (zh) * 2017-10-20 2018-06-29 青岛青科重工有限公司 一种混凝土湿喷台车臂架
CN110984578B (zh) * 2019-11-07 2020-11-06 中联重科股份有限公司 臂架、工程机械和臂架的制造方法

Also Published As

Publication number Publication date
KR20230175250A (ko) 2023-12-29
WO2022229013A1 (fr) 2022-11-03
CN117377806A (zh) 2024-01-09
EP4083345A1 (fr) 2022-11-02

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