CN219950321U

CN219950321U - Tower crane balance arm structure with rectangular inverted triangle section

Info

Publication number: CN219950321U
Application number: CN202321386465.6U
Authority: CN
Inventors: 米成宏; 王虎; 郑怀鹏; 刘磊; 张阳羊
Original assignee: Xuzhou Construction Machinery Group Co Ltd XCMG
Current assignee: Xuzhou Construction Machinery Group Co Ltd XCMG
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-11-03
Anticipated expiration: 2033-05-31

Abstract

The utility model provides a tower crane balance arm structure with a rectangular inverted triangle section, which comprises a lower chord, an inclined lower chord and a direct chord which are connected in sequence and positioned on the same plane; the lower chord is positioned at the tail part of the balance arm of the tower crane and is arranged corresponding to the upper chord, and the upper chord extends forwards to the position above the direct chord; the direct chord is parallel to the upper chord; the upper chord member and the lower chord member, and the upper chord member and the direct chord member are connected through web members. The utility model not only can realize the installation of the balance weight, but also reduces the weight of the whole balance arm and increases the rigidity of the balance arm.

Description

Tower crane balance arm structure with rectangular inverted triangle section

Technical Field

The utility model belongs to the technical field of tower crane balance arms, and particularly relates to a tower crane balance arm structure with a rectangular inverted triangle section.

Background

The tower crane balance arm generally adopts a rectangular truss structure, so that the installation of the balance weight is convenient, and the size of the balance arm for installing the balance weight is increased because of the large lifting weight of the ultra-large tower crane, so that the weight of the balance arm is increased, the manufacturing cost of the balance arm is increased, and the operation of the tower crane is not facilitated. The existing tower crane balance arm mainly adopts a rectangular truss type, as shown in fig. 1, and consists of a lower chord member 1, an upper chord member 2, a web member 3 and a balance weight 4, wherein the balance weight 4 is arranged at the tail part of the balance arm, the top view of the balance arm is shown in fig. 2, and the isometric view of the balance arm is shown in fig. 3.

Disclosure of Invention

The utility model aims to provide a tower crane balance arm structure with a rectangular inverted triangle section, which not only can realize the installation of a balance weight, but also reduces the manufacturing cost of the balance arm, reduces the weight of the whole balance arm, increases the rigidity of the balance arm and is beneficial to the operation of the balance arm.

A tower crane balance arm structure with a rectangular inverted triangle section comprises a lower chord member 1, an inclined lower chord member 5 and a direct chord member 6 which are connected in sequence and positioned on the same plane;

the lower chord member 1 is positioned at the tail part of the balance arm of the tower crane and is arranged corresponding to the upper chord member 2, and the upper chord member 2 extends forwards to the position above the direct chord member 6;

the direct chords 6 are parallel to the upper chords 2;

the upper chord member 2 and the lower chord member 1 and the upper chord member 2 and the direct chord member 6 are connected through web members 3.

Preferably, the inclined lower chord 5 and the upper chord 2 are connected through web members 3.

Preferably, the web member 3 on the diagonal lower chord member 5 is connected to the lower chord member 1 and the diagonal lower chord member 5 at a point.

Preferably, the inclined lower chord 5 comprises two symmetrically arranged and intersecting chords, and the intersection point is connected with the direct chord 6.

Preferably, the direct chord member 6 is integrated with a pair of symmetrically arranged web members 3 at a connection point for connecting the web members 3.

Preferably, the upper chord 2 is symmetrically arranged about the lower chord 6.

Preferably, it further comprises a counterweight 4, which is located at the end of the balance arm structure of the tower crane.

Preferably, the upper chord member 2 is integrated with a pair of symmetrically arranged web members 3 at a connection point for connecting the upper web members 3 thereof.

Compared with the prior art, the utility model has the advantages that:

(1) The original rectangular balance arm truss structure is converted into the inverted triangle structure, so that raw material use is reduced, the weight of the whole balance arm is reduced, and the manufacturing cost of the balance arm is reduced.

(2) The lateral rigidity of the balance arm is increased, the width of the balance arm is larger, and the balance arm has small lateral deformation and good rigidity under the same load. In particular, the rectangular rotary triangle structure has less material and reduced weight, so that the whole balance arm has small deformation under the same stress condition, namely the rigidity is increased.

(3) As the lateral windward area of the arm support is reduced, the wind resistance is reduced during rotation, and the operation stability of the tower crane is better.

Drawings

FIG. 1 is a rectangular truss of a prior art tower crane gimbal;

FIG. 2 is a top view of a prior art tower crane balancing arm;

FIG. 3 is an isometric view of a prior art tower crane balance arm;

FIG. 4 is a side view of a rectangular inverted triangle section tower crane balance arm structure;

FIG. 5 is a top view of a rectangular inverted triangular cross section tower crane balance arm structure;

fig. 6 is an isometric view of a structure of a balance arm of a tower crane with a rectangular inverted triangle section.

1-lower chord, 2-upper chord, 3-web member, 4-counterweight, 5-oblique lower chord and 6-direct chord.

Description of the embodiments

The rectangular inverted triangular cross section tower crane balance arm structure of the present utility model will be described in more detail below in conjunction with the schematic drawings, wherein preferred embodiments of the present utility model are shown, it being understood that one skilled in the art could modify the utility model described herein while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.

Examples

As shown in fig. 4-6, a tower crane balance arm structure with a rectangular inverted triangle section comprises a lower chord member 1, an inclined lower chord member 5 and a direct chord member 6 which are sequentially connected and positioned on the same plane.

Namely, the lower chord member 1 is connected with the lower chord member 1 to the direct chord member 6 through the inclined lower chord member 5, and the web member 3 is connected with the lower chord member 1, the inclined lower chord member 5 and the direct chord member 6, so that the balance arm structure is changed from a rectangular truss type to an inverted triangular truss type.

The lower chord member 1 is positioned at the tail part of the balance arm of the tower crane and is arranged corresponding to the upper chord member 2, and the upper chord member 2 extends forwards to the position above the direct chord member 6.

The direct chords 6 are parallel to the upper chords 2.

The upper chord member 2 and the lower chord member 1, the upper chord member 2 and the direct chord member 6, and the inclined lower chord member 5 and the upper chord member 2 are all connected through web members 3.

The inclined lower chord member 5 comprises two symmetrical and intersected chord members, and the intersection point is connected with the direct chord member 6. The web member 3 on the inclined lower chord 5 is connected to the lower chord 1 and the inclined lower chord 5 at a point.

To ensure lateral stiffness of the balancing arm, the tie-down chord 6 is integrated with a symmetrically arranged web member 3 for connecting the tie-down points of its upper web member 3. The upper chord member 2 is integrated with a pair of symmetrically arranged web members 3 at a connecting point for connecting the upper web members 3.

Examples

The upper chord 2 is symmetrically arranged about the lower chord 6 to ensure rigidity of the structure.

The tail part of the balance arm structure of the tower crane is provided with a balance weight 4. The installation of the counterweight 4 can be realized while reducing the weight of the entire counterweight arm.

The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any person skilled in the art will make any equivalent substitution or modification to the technical solution and technical content disclosed in the utility model without departing from the scope of the technical solution of the utility model, and the technical solution of the utility model is not departing from the scope of the utility model.

Claims

1. The tower crane balance arm structure with the rectangular inverted triangle section is characterized by comprising a lower chord member (1), an inclined lower chord member (5) and a direct chord member (6) which are connected in sequence and positioned on the same plane;

the lower chord member (1) is positioned at the tail part of the balance arm of the tower crane and is arranged corresponding to the upper chord member (2), and the upper chord member (2) extends forwards to the position above the direct chord member (6);

the direct chord (6) is parallel to the upper chord (2);

the upper chord member (2) and the lower chord member (1) and the upper chord member (2) and the direct chord member (6) are connected through web members (3).

2. The balance arm structure of the rectangular inverted triangle section tower crane according to claim 1, wherein the inclined lower chord member (5) and the upper chord member (2) are connected through a web member (3).

3. The tower crane balance arm structure with rectangular inverted triangle section according to claim 2, wherein the web member (3) on the inclined lower chord member (5) is connected with the lower chord member (1) and the inclined lower chord member (5) at a point.

4. The rectangular inverted triangle section tower crane balance arm structure according to claim 1, wherein the inclined lower chord member (5) comprises two symmetrically arranged and intersecting chord members, and the intersection point is connected with the straight down chord member (6).

5. The balancing arm structure of a tower crane with rectangular inverted triangle section according to claim 1, characterized in that on the straight down chord (6) the connection points for connecting the upper web members (3) thereof are integrated with symmetrically arranged web members (3).

6. The rectangular inverted triangle section tower crane balance arm structure according to claim 1, wherein the upper chord (2) is symmetrically arranged with respect to the direct chord (6).

7. The rectangular inverted triangle section tower crane balance arm structure according to claim 1, further comprising a counterweight (4) located at the tail of the tower crane balance arm structure.

8. The balancing arm structure of a tower crane with rectangular inverted triangle section according to claim 1, characterized in that the upper chord member (2) is integrated with a symmetrically arranged web member (3) for connecting the connection points of the upper web member (3) thereof.