阅读说明：本技术 伸缩臂和移动式起重机 (Telescopic boom and mobile crane ) 是由 S·布佐斯卡 M·赫尔比格 于 2020-03-30 设计创作，主要内容包括：本发明涉及一种伸缩臂和移动式起重机,特别是具有铰接部段的伸缩臂,在所述伸缩臂的侧面设置有至少两个变幅缸容纳部,用于将变幅缸紧固至所述伸缩臂。所述变幅缸容纳部的支承板进入板材金属箱结构中,所述板材金属箱结构由三个部分变幅缸箱组成。(The invention relates to a telescopic boom and a mobile crane, in particular a telescopic boom with articulated sections, at least two luffing cylinder receivers being provided on the side of the telescopic boom for fastening a luffing cylinder to the telescopic boom. The bearing plate of the amplitude cylinder accommodating part enters a plate metal box structure, and the plate metal box structure consists of three part amplitude cylinder boxes.)

1. Telescopic boom with articulated sections (1), at least two luffing cylinder receivers (33), in particular bolt receivers, being provided on the lateral sides of the telescopic boom for fastening a luffing cylinder to the telescopic boom, the bearing plates of the luffing cylinder receivers being of sheet metal box construction and serving for transferring loads from the luffing cylinder receivers into the structure of the telescopic boom,

it is characterized in that the preparation method is characterized in that,

the sheet metal tank structure consists of three partial luffing cylinder boxes (40, 50, 60), wherein two partial luffing cylinder boxes (40, 50) are arranged opposite one another parallel to the hinge section (1) in the lower housing in a lateral region substantially below the side wall (11), and a third partial luffing cylinder box (60) extends transversely to the hinge section (1).

2. Telescopic boom according to claim 1, characterized in that the three partial luffing cylinder boxes (40, 50, 60) are each constructed as a closed box structure with two side walls, a cover plate and an end plate.

3. A telescopic boom according to any of the preceding claims, characterized in that the third partial luffing cylinder box (60) is connected to the end of the luffing cylinder box (40, 50) opposite the end with the luffing cylinder receptacle (33).

4. Telescopic boom according to claim 3, characterized in that the third partial luffing cylinder box (60) is welded to the luffing cylinder box (40, 50).

5. The telescopic boom according to claim 4, characterized in that the substantially parallel plates of the partial horn cylinder housings (40, 50) penetrate at least partially the plates of the third partial horn cylinder housing (60).

6. A telescopic arm according to any of the preceding claims, characterized in that at least one buckling-resistant reinforcement (12, 13) is formed on the lower shell of the articulated section (1), which at least one buckling-resistant reinforcement (12, 13) extends only to the partial luffing cylinder box (60) extending transversely to the articulated section (1).

7. The telescopic arm according to claim 6, characterized by at least one anti-buckling stiffener (12, 13) formed on the lower shell of the articulated section (1), which at least one anti-buckling stiffener (12, 13) is welded to the partial luffing cylinder box (60).

8. Telescopic arm according to any one of the preceding claims, wherein a further sheet metal box structure (70) connects the partial luffing cylinder boxes (40, 50) arranged parallel to each other below the lower casing of the articulated section (1).

9. Telescopic boom according to claim 8, characterised in that the centre (M) of the further sheet metal box structure (70) is defined between two partial luffing cylinder boxes (40, 50) adjoining each other, the centre (M) of the further sheet metal box structure (70) being connected with the lower shell of the articulated section (1).

10. Crane, in particular mobile crane, having at least one telescopic arm according to any of the preceding claims.

Technical Field

The invention relates to a telescopic boom with articulated sections for cranes, in particular mobile cranes, wherein at least two luffing cylinder receivers are provided on the lateral surface of the telescopic boom for fastening a luffing cylinder to the telescopic boom.

Background

For example, a mobile crane is known from DE 102017110412 a1, in which a centrally arranged luffing cylinder can be fastened to the articulated section of the telescopic boom by means of a bolt receptacle. The load is transmitted via the bolt receptacles into the lower housing of the cantilever profile and a special steel plate structure is provided there. While it is sufficient to provide a single, centered luffing cylinder for multiple cranes, it has been common practice for large cranes to use two luffing cylinders.

Fig. 1 and 2a show a corresponding conventional solution for a luffing cylinder receptacle in a large crane based on the prior art. The two luffing cylinders, which are not shown further here, are rocked on the closed luffing cylinder box 3 consisting of a steel plate structure at the two force introduction points 33 of the articulated section 1 and on the entire telescopic boom (only partially shown in the figures). The force introduction point 33 is arranged in a bearing plate which, in the sheet metal tank configuration, conducts the load from the luffing cylinder receptacle into the structure of the articulated section 1 of the telescopic boom. The main part of the force is directed into the soft lower shell of the hinge section 1. At the connection between the cover plate 31 and the lower shell of the hinge section 1 and the side plates 32, relatively sharp corners of the luffing cylinder box 3 are formed. The angle marked a in fig. 1 causes problems, in particular at the relevant torque angles, because the maximum permissible force transmission through the luffing cylinder box 3 is limited. The torque angle is produced by allowable loads, such as wind or the inclination of the entire crane. If the sheet metal box structure is only loaded in the luffing plane of the telescopic boom for load transfer, the torque angle must be set to 0 degrees. If disturbing forces, such as wind, push the telescopic boom out of the luffing plane, the torque angle increases and the entire telescopic boom is additionally loaded. The above-mentioned sharp angles in the area a prove problematic especially as the torque angle increases.

Disclosure of Invention

The object of the invention is to achieve a higher load capacity of the sheet metal box structure and the articulated sections, while at the same time reducing the weight, and thus achieving a higher load capacity of the entire arm. At the same time, the achieved allowable load should also be robust against disturbances such as wind or the inclination of the entire crane.

According to the invention, this object is achieved by the combination of features of claim 1. At least two luffing cylinder receivers, in particular bolt receivers, are therefore provided on the side of the telescopic boom for fastening the luffing cylinder to the telescopic boom. The bearing plate of the luffing cylinder receptacle enters the sheet metal box structure for transferring the load from the luffing cylinder receptacle into the structure of the telescopic boom. According to the invention, the sheet metal box structure consists of three partial luffing cylinder boxes, two of which are arranged parallel to the articulated section and opposite one another in the lateral region of the lower housing essentially below the lateral wall, and a third partial luffing cylinder box extends transversely to the articulated section.

The partial luffing cylinder housings aligned parallel to the articulated sections are arranged such that the majority of the force is introduced into the rigid profile wire walls of the articulated sections. This is achieved by means of two lateral uprights of the partial luffing cylinder box. A further increase in rigidity and thus in the load-bearing capacity is achieved by the partial luffing cylinder box extending transversely to the articulated section.

Preferred embodiments of the invention follow from the dependent claims following the independent claims.

It is particularly advantageous to design the three partial luffing cylinder boxes each as a closed box structure with two side walls, a cover plate and corresponding end plates. The upper side plate of the parallel-running partial luffing cylinder box can also consist of a plurality of partial plates.

The third partial luffing cylinder housing, which extends transversely to the articulated section, is preferably connected to the end of the luffing cylinder housing opposite the end having the luffing cylinder receiving section. For increased stability, a third luffing cylinder box is welded to the parallel luffing cylinder boxes.

According to another preferred embodiment of the invention, the substantially parallel plates of the partial horn cylinder block can penetrate at least partially through the plate of the third partial horn cylinder block. And the side plates or the vertical plates of the parallel partial amplitude cylinder boxes are continued as subsequent side plates or vertical plates in the transverse partial amplitude cylinder boxes. By welding these interpenetrating metal sheet structures, a particularly high stability can be achieved.

Preferably, the buckling-resistant reinforcing ribs, which are correspondingly formed on the lower housing of the articulated section, extend only into the part of the luffing cylinder box which extends transversely to the articulated section. In order to increase the strength, the ends of the buckling-resistant reinforcing bars can be welded to part of the luffing cylinder box.

Finally, according to a further advantageous embodiment, a further sheet metal box structure can connect the partial luffing cylinder boxes arranged parallel to one another below the lower casing of the articulated section. The further sheet metal tank structure is arranged here substantially parallel to the third partial luffing cylinder tank. Here too, the strength is increased by welding to two partial luffing cylinder housings which are parallel to one another.

It is particularly advantageous if the center of the further sheet metal box structure is delimited in the region between the two partial luffing boxes and is connected at its center at least in part, preferably also welded, to the lower shell of the articulated section. The connection is only slightly pressed into the lower shell. In essence, this additional sheet metal box structure stiffens the two luffing cylinder receivers representing the point of introduction of force to one another. Furthermore, the stabilizing force can now be received by the lower shell perpendicular to the longitudinal axis of the hinge segments. The lower shell is particularly load bearing in this direction.

Finally, the invention relates to a crane, in particular a mobile crane, having at least one telescopic boom having the above-mentioned features.

The sheet metal box structure according to the invention, which consists of three partial luffing cylinder boxes, transmits the main forces to the articulated sections. The hinge sections are bent externally around the connection points of the sheet metal box structure. In contrast to the solution according to the prior art described at the outset, it is particularly advantageous here that no sharp corners are formed in the region of the lower shell, which points represent the weak regions of the steel plate buckling. Such sharp transition corners are thus avoided, improving stability and increasing load-bearing capacity, while the whole structure is relatively light.

Drawings

Further features, details and advantages of the invention result from the following detailed description of preferred embodiments with reference to the drawings. Wherein:

FIG. 1: for a detailed illustration of a telescopic arm according to the prior art,

FIG. 2 a: in a side view of the hinge section according to figure 1,

FIG. 2 b: a side view of a hinged segment according to an embodiment of the present invention,

FIG. 3: is a detailed illustration of a perspective view of a hinge section,

FIG. 4: a side view of a detail of the hinge section according to figure 3,

FIG. 5 a: a bottom view of a detail of the hinge section according to figure 3,

FIG. 5 b: for the purpose of illustration in correspondence with fig. 5a, in which the cover plate of part of the luffing cylinder is partly omitted, and

FIG. 6: is a front view according to the detailed illustration of fig. 3.

Detailed Description

Fig. 2b shows a hinge section 1 of a telescopic arm according to an embodiment of the invention. The lateral luffing cylinder receptacle 33 is arranged here in the form of a bolt receptacle as a force introduction point. A luffing cylinder (not shown in detail here) is articulated on the luffing cylinder receptacle 33 and is used in a known manner for extending and retracting the telescopic boom up and down.

In the present case, owing to the large crane, a respective luffing cylinder receiver 33 is provided on each side. The bearing plate of the luffing cylinder receiver is turned into the sheet metal box structure 3 for transferring the load from the luffing cylinder receiver 33 into the structure of the telescopic boom.

A more precise construction of the sheet metal box structure will be described with reference to figures 3, 4, 5a, 5b and 6. The sheet metal box structure 3 thus consists of three partial luffing boxes 40, 50, 60, of which two partial luffing cylinder boxes 40, 50 are arranged parallel to the hinge section 1 opposite one another in the lateral region of the lower housing of the hinge section 1, substantially below the side wall 11 (see in particular fig. 6).

In addition, a third partial luffing cylinder housing 60 is arranged transversely to the articulated section 1, as can be seen, for example, in fig. 3. The partial luffing cylinder housings 40, 50 transmit the majority of the force into the rigid profile wire wall 11 of the articulated section 1. This is achieved by two risers 41, 42 (see fig. 3). Here, as shown here, the higher steel plate reaching the outer wall can also consist of several partial steel plates 41, 41' (see fig. 4). The two partial luffing cylinder boxes 40, 50 represent closed boxes and have cover plates 43, 44. Suitable end plates may also be provided.

The partial luffing cylinder box 60 extends transversely to the telescopic arm section 1. The luffing cylinder box 60 also has vertical plates 61, 62. In order to also form a closed box-like structure here, a cover plate 63 is also provided.

Most of the cover plate is hidden in fig. 5 b. It can thus be seen that the partial luffing cylinder box 40, 60 penetrates partially like the partial luffing cylinder box 50, 60. Thus, after welding the two partial luffing cylinder boxes 40 and 60 together, the elevation 42 in the partial luffing cylinder box 60 continues via the elevation 42'.

As can be seen in detail in fig. 3, the parallel running buckling-resistant stiffeners 12, 13 provided in the articulated sections 1 rest on the partial luffing cylinder box 60 and are welded thereto. The compression-resistant stiffeners 12, 13 continuing in the region of the luffing cylinder box are not required, since this in itself provides sufficient stability against bulging.

In particular, as can be seen from fig. 3 and also from fig. 6, a further sheet metal box structure 70 is additionally provided as a stable additional box. It is also a fully closed box-shaped sheet metal box structure. Thus, there are side panels and cover panels. The sheet metal box structure 70 hardens the entire sheet metal box structure 3 and connects the two partial luffing cylinder boxes 40, 50 to one another. In the middle M, it is connected to the relatively soft lower shell of the hinge section 1, as can be clearly seen in fig. 6. The connection is only slightly pressed into the lower shell. It essentially reinforces the two luffing cylinder receivers 33, i.e. the force introduction points, to one another. In addition, stabilizing forces perpendicular to the longitudinal axis of the hinge section 1 can also be absorbed by the lower housing. The lower shell is particularly load bearing in this direction.