Distributor boom arm and concrete pump

Abstract

Distributor boom arm for a, in particular mobile, concrete pump, with a first side wall and a second side wall, wherein the first side wall has two side plates, characterized in that one of the side plates of the first side wall extends into the distributor boom arm and is connected to the second side wall and / or that the second side wall has two side plates, wherein one of the side plates of the second side wall extends into the distributor boom arm and is connected to the first side wall.

Description

[0001] The present invention relates to a distributor mast arm for a, in particular mobile, concrete pump, comprising a first side wall and a second side wall, wherein the first side wall has two side plates.

[0002] According to current technology, the placing boom arms of a truck-mounted concrete pump are constructed of sheet steel with a basic box-section profile. Known placing boom arms can have a cranked section. During operation, high mechanical stresses can occur in the cranked section due to flexural-torsional buckling. These mechanical stresses arise, for example, from the off-center placement of the placing boom arm's delivery line, through which heavy concrete is conveyed. The greater the crank in the cranked section, the greater the lever arm and the higher the mechanical stress and thus the strain in the cranked section.

[0003] According to the state of the art, the mechanical stresses and thus the strain in the cranked section of such distribution mast arms are reduced by thick side plates or straps. This results in a high weight for such distribution mast arms. Consequently, such distribution mast arms are subject to very little stress outside the cranked section.

[0004] It is also known that bulkhead plates are arranged within such distribution mast arms or the box section of such distribution mast arms to counteract the high stresses caused by flexural-torsional buckling. A disadvantage of arranging bulkhead plates in such distribution mast arms or in the box section of such distribution mast arms is that the connection of a bulkhead plate arranged in the box section should preferably be made on all inner sides of the box section to avoid local stress concentrations. This requires a high welding effort and a complex welding sequence, in which the box section is closed from the outside last with one of the side plates or flanges of the box section.

[0005] Against this background, the present invention aims to improve a distributor mast arm known from the prior art, particularly with regard to stability with respect to flexural-torsional buckling, especially in a cranked section.

[0006] This problem is solved by the subject matter with the features of independent claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

[0007] According to the invention, it is provided that one of the side plates of the first side wall extends into the distributor mast arm and is connected to the second side wall and / or that the second side wall has two side plates, wherein one of the side plates of the second side wall extends into the distributor mast arm and is connected to the first side wall.

[0008] The phrase "a side plate extends into the distribution mast arm" preferably means that at least one section of the side plate runs in the distribution mast arm and / or in the box profile of the distribution mast arm.

[0009] Preferably, the side plate is provided that it runs at least partially within the distributor mast arm or inside the distributor mast arm.

[0010] Preferably, by extending a side plate of one side wall into the distributor mast arm to the other side wall and connecting the side plate to the other side wall, the lever arm in the event of an off-center load on the distributor mast arm is reduced by the additional support provided by the side plate extending into the distributor mast arm.

[0011] One, several or all of the side plates and / or side walls extending into the distributor mast arm may also extend through the distributor mast arm.

[0012] One, several or all of the side panels and / or side walls can consist of one sheet or several sheets.

[0013] Preferably, the distributor mast arm has a cranked section and the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm extend into the distributor mast arm in the area of ​​the cranked section.

[0014] The cranked section can also be referred to as the crank area or arm crank. The distributor mast arm can also be referred to as the mast arm.

[0015] The distributor mast arm is preferably strongly cranked. The distributor mast arm is preferably designed to resist flexural-torsional buckling.

[0016] Preferably, it is provided that the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm extend with a section into the distributor mast arm.

[0017] Preferably, the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm are formed in one piece or in multiple pieces.

[0018] Preferably, the side plate of the first side wall extending into the distributor mast arm and the side plate of the second side wall extending into the distributor mast arm run parallel to each other.

[0019] Preferably, the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm are flat or not bent.

[0020] Preferably, the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm run parallel to a longitudinal axis of the distributor mast arm.

[0021] Preferably, the side plate of the first side wall that does not extend into the distributor mast arm and / or the side plate of the second side wall that does not extend into the distributor mast arm are formed in one piece or in multiple pieces.

[0022] Preferably, the side plate of the first side wall that does not extend into the distributor mast arm and / or the side plate of the second side wall that does not extend into the distributor mast arm has one, two or more bends.

[0023] Preferably, it is provided that an edge of the side plate of the first side wall extending into the distributor mast arm is connected to a surface of the second side wall, in particular an inner one, and / or to the side plate of the second side wall that does not extend into the distributor mast arm, and / or that an edge of the side plate of the second side wall extending into the distributor mast arm is connected to a surface of the first side wall, in particular an inner one, and / or to the side plate of the first side wall that does not extend into the distributor mast arm.

[0024] Preferably, it is provided that an edge of the side plate of the first side wall, which does not extend into the distributor mast arm, is connected to a surface of the side plate of the first side wall, which extends into the distributor mast arm, and / or an edge of the side plate of the second side wall, which does not extend into the distributor mast arm, is connected to a surface of the side plate of the second side wall, which extends into the distributor mast arm.

[0025] Preferably, one, several or all of the side plates have a constant or varying wall thickness.

[0026] Preferably, one side plate has a wall thickness different from another side plate.

[0027] Preferably, the distributor mast arm has pivot points at its ends for pivoting another distributor mast arm and / or for pivoting it on the concrete pump.

[0028] Preferably, the distributor mast arm is designed with a box-shaped cross-section and / or has a box profile.

[0029] The distribution mast is preferably designed in the form of a box profile and / or in sheet steel box construction.

[0030] The distributor mast arm, in particular for a concrete distributor mast, is preferably designed in the form of a box profile and preferably has a side wall or side plate which leads at least partially and / or partially into the box profile and meets another side wall.

[0031] Preferably, the distributor mast arm has an upper belt and a lower belt, wherein the belts and the side plates are box-shaped in cross-section.

[0032] Preferably, the upper belt and / or the lower belt are designed as a single piece or in multiple pieces.

[0033] Preferably, the distributor mast arm is a welded construction, wherein the elements, in particular side plates and straps, of the distributor mast arm are connected to each other by means of welds.

[0034] The side panels and / or the straps are preferably made of steel sheets.

[0035] Preferably, the distributor mast arm, particularly in the area of ​​the cranked section, does not have a bulkhead plate running in the distributor mast arm, in particular an additional classic or conventional one.

[0036] Preferably, the distributor mast arm is intended to be part of a concrete distributor mast for the concrete pump.

[0037] In other words, it is preferably provided that at least one side plate of a first side wall of the distributor mast arm extends in the direction of the longitudinal axis of the distributor mast arm onto the opposite second side wall or an opposing side plate of the second side wall, while another side plate of the first side wall follows the bend from the other end of the distributor mast arm and extends onto the side plate of the first side wall that leads into the distributor mast arm in the direction of the longitudinal axis of the distributor mast arm. In other words, it is preferably provided that a side plate in the bent section divides into an inner part and an outer part.

[0038] The invention also relates to a concrete pump, in particular a mobile concrete pump, with a distributor mast arm according to the invention.

[0039] Preferably, the concrete pump is a truck-mounted concrete pump. Preferably, the concrete pump is a truck-mounted concrete pump.

[0040] Preferably, the distribution mast arm features a structural improvement compared to distribution mast arms known from the prior art. Preferably, the distribution mast arm is designed as a replacement or repair solution.

[0041] It should be noted here that the terms "a" and "an" do not necessarily refer to exactly one of the elements, although this is a possible interpretation, but can also denote a plurality of elements. Likewise, the use of the plural also includes the presence of the element in question in the singular, and conversely, the singular also includes several of the elements in question. Furthermore, all features of the invention described herein can be combined with one another or claimed separately from one another as desired.

[0042] Further advantages, features, and effects of the present invention will become apparent from the following description of preferred embodiments with reference to the figures, in which identical or similar components are designated by the same reference numerals. These figures show: Fig. 1: a longitudinal section through an embodiment of a distributor mast arm according to the invention. Fig. 2: a cross-section through the embodiment of a distributor mast arm according to the invention made of Fig. 1. Fig. 3: a cross-section through the embodiment of a distributor mast arm according to the invention made of Fig. 1. Fig. 4: a detail of the longitudinal section from Fig. 1.

[0043] The in Fig. The distributor mast arm 1 shown is a distributor mast arm 1 for a concrete distributor mast of a mobile concrete pump in the form of a truck mixer concrete pump.

[0044] The distributor boom arm 1 has a pivot point at one end for attaching another distributor boom arm and a pivot point at the other end for attaching it to the mobile concrete pump. The pivot points have pivot lugs or pivot eyes.

[0045] The distributor mast arm 1 has a cranked section, with the distributor mast arm 1 following a double bend or S-shape.

[0046] In Fig. The cross-sections AA and BB and the detail Z are marked. Detail Z concerns the cranked section.

[0047] In Fig. 2 is the cross-section AA made of Fig. Figure 1 shows the distributor mast arm 1 having side walls 2 and 3 as well as top and bottom flanges 4. The side walls 2 and 3 and the flanges 4 form a box profile.

[0048] In Fig. 3 is the cross-section BB made of Fig. 1 shown.

[0049] Detail Z is in Fig. 4 shown.

[0050] The distributor mast arm 1 is of box-section construction and therefore has a box profile. The distributor mast arm 1 has side plates 2 and 3 arranged laterally on both sides. The side plates 2 and 3 meet along the longitudinal axis of the distributor mast arm 1. Each of the side plates extends in Fig. 2. Insert each side panel 2 into the box profile until it meets the opposite side panel 3. The side panels 2 and 3 may have different wall thicknesses in certain sections and / or be curved.

[0051] To maintain the welding sequence and manufacturability, at least one side wall or flange 4 of the box profile is additionally divided and provided as an end plate 5, as shown in Fig. 2 is shown.

[0052] The side plates 2, which extend section by section into the distributor mast arm 1 and are connected to the side plates 3 of the other side wall, provide stabilization and / or support to the distributor mast arm, in particular against a load that causes flexural-torsional buckling of the cranked section.

Claims

[1] Distributing mast arm for a concrete pump, in particular mobile, with a first side wall and a second side wall, wherein the first side wall has two side plates, characterized by , that one of the side plates of the first side wall extends into the distributor mast arm and is connected to the second side wall and / or that the second side wall has two side plates, one of the side plates of the second side wall extending into the distributor mast arm and being connected to the first side wall. [2] Distributor mast arm according to claim 1, characterized by , that the distributor mast arm has a cranked section and the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm extend into the distributor mast arm in the area of ​​the cranked section. [3] Distributor mast arm according to claim 1 or 2, characterized by, that the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm extend with a section into the distributor mast arm. [4] Distributor mast arm according to one of the preceding claims, characterized by that the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm are formed in one piece or in multiple pieces. [5] Distributor mast arm according to one of the preceding claims, characterized by , that the side plate of the first side wall extending into the distributor mast arm and the side plate of the second side wall extending into the distributor mast arm run parallel to each other. [6] Distributor mast arm according to one of the preceding claims, characterized bythat the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm are flat or not bent. [7] Distributor mast arm according to one of the preceding claims, characterized by that the side plate of the first side wall extending into the distributor mast arm and / or the side plate of the second side wall extending into the distributor mast arm run parallel to a longitudinal axis of the distributor mast arm. [8] Distributor mast arm according to one of the preceding claims, characterized by that the side plate of the first side wall not extending into the distributor mast arm and / or the side plate of the second side wall not extending into the distributor mast arm are formed in one piece or in multiple pieces. [9] Distributor mast arm according to one of the preceding claims, characterized bythat the side plate of the first side wall not extending into the distributor mast arm and / or the side plate of the second side wall not extending into the distributor mast arm have one, two or more bends. [10] Distributor mast arm according to one of the preceding claims, characterized by , that an edge of the side plate of the first side wall extending into the distributor mast arm is connected to a surface of the second side wall, in particular an inner surface, and / or to the side plate of the second side wall that does not extend into the distributor mast arm, and / or that an edge of the side plate of the second side wall extending into the distributor mast arm is connected to a surface of the first side wall, in particular an inner surface, and / or to the side plate of the first side wall that does not extend into the distributor mast arm. [11] Distributor mast arm according to one of the preceding claims, characterized by, that an edge of the side plate of the first side wall, which does not extend into the distributor mast arm, is connected to a surface of the side plate of the first side wall, which extends into the distributor mast arm, and / or an edge of the side plate of the second side wall, which does not extend into the distributor mast arm, is connected to a surface of the side plate of the second side wall, which extends into the distributor mast arm. [12] Distributor mast arm according to one of the preceding claims, characterized by that one, several or all of the side panels each have a constant or varying wall thickness. [13] Distributor mast arm according to one of the preceding claims, characterized by that one side panel has a different wall thickness than another side panel. [14] Distributor mast arm according to one of the preceding claims, characterized bythat the distributor mast arm has pivot points at its ends for pivoting another distributor mast arm and / or for pivoting on the concrete pump. [15] Distributor mast arm according to one of the preceding claims, characterized by that the distributor mast arm has a box-shaped cross-section and / or a box profile. [16] Distributor mast arm according to one of the preceding claims, characterized by , that the distributor mast arm has an upper belt and a lower belt, wherein the belts and the side plates are box-shaped in cross-section. [17] Distributor mast arm according to claim 16, characterized by that the upper strap and / or the lower strap are made of one piece or of multiple pieces. [18] Distributor mast arm according to one of the preceding claims, characterized by, that the distributor mast arm is a welded construction, wherein the elements, in particular side plates and straps, of the distributor mast arm are connected to each other by means of welds. [19] Distributor mast arm according to one of the preceding claims, characterized by that the distributor mast arm, particularly in the area of ​​the cranked section, does not have a bulkhead running in the distributor mast arm. [20] Distributor mast arm according to one of the preceding claims, characterized by that the distributor mast arm is part of a concrete distributor mast for the concrete pump. [21] Concrete pump, in particular mobile concrete pump, with a distributor boom arm according to one of the preceding claims. [22] Concrete pump according to claim 21, characterized by that the concrete pump is a truck-mounted concrete pump.

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