Forced welding tool for lower support of tower crane

Abstract

The utility model discloses a tower crane lower support forced welding tool which comprises a bottom table positioning frame and four main chord member connecting seat sets, the bottom table positioning frame is of a hollow rectangular structure, the four main chord member connecting seat sets are arranged at the four corners of the bottom table positioning frame respectively, each main chord member connecting seat set comprises a main chord member positioning support, a steel sleeve and a pin shaft, the main chord member positioning support is located on the bottom table positioning frame, two mounting holes with different heights are formed in the main chord member positioning support, a steel sleeve and a pin shaft are mounted on the two mounting holes respectively, and the welding process of the lower support of the tower crane can be assisted.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to a forced welding tooling for the lower support of a tower crane. Background Technique

[0002] As a key component of a tower crane, the lower support of the tower crane needs to be connected to the slewing frame and the tower body respectively. Therefore, it is required to have high production efficiency, relatively small size and shape and position errors in its production.

[0003] The mainstream structure of the connection between the lower support of the tower crane and the tower body on the market is pin connection in the cross direction plus end face contact force, which has high requirements for the dimensional accuracy from the pin hole on the main chord of the lower support to its lower end face. Due to its high overall processing cost, only through riveting and welding tooling, it cannot better meet the connection accuracy due to welding deformation. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a forced welding tooling for the lower support of a tower crane, which can assist the welding process of the lower support of the tower crane.

[0005] The utility model adopts the following technical solutions:

[0006] A forced welding tooling for the lower support of a tower crane, including a bottom table positioning frame and a main chord connection seat group. The bottom table positioning frame is a hollow rectangular structure, and 4 main chord connection seat groups are respectively arranged at 4 corners of the bottom table positioning frame. The main chord connection seat group includes a main chord positioning support, a steel sleeve and a pin. The main chord positioning support is located on the bottom table positioning frame, and the main chord positioning support has two mounting holes with different heights, and a steel sleeve and a pin are respectively mounted on the two mounting holes.

[0007] Preferably, the lower surface of the main chord positioning support has a mounting plate, and the mounting plate has a plurality of positioning holes, and positioning bolts and precision bolts are arranged in the positioning holes.

[0008] Preferably, the positioning bolt includes an equal-height positioning section, a support positioning section and a threaded section.

[0009] Preferably, the bottom table positioning frame is welded by double-layer square steel pipes.

[0010] Preferably, the steel sleeve is an integral straight steel sleeve structure.

[0011] Compared with the prior art, the utility model has the following advantages: The utility model provides a forced welding tooling for the lower support of a tower crane, including a bottom table positioning frame and a main chord connection seat group. The lower support can be connected to the main chord connection seat group through a pin. Through this tooling, the welding process of the lower support of the tower crane can be assisted. Brief Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of a forced welding tooling for the lower support of a tower crane.

[0013] Figure 2 It is a schematic diagram of the usage state of the forced welding tooling for the lower support of a tower crane.

[0014] Figure 3 It is a structural schematic diagram of the main chord connecting seat group.

[0015] Figure 4 It is a structural schematic diagram of the positioning bolt.

[0016] In the figure, it includes a base positioning frame 1, a main chord connecting seat group 2, a positioning bolt 3, a precision reamed bolt 4, a main chord positioning support 5, a mounting plate 5-1, a steel sleeve 6, a pin shaft 7, an equal-height positioning section 8, a support positioning section 9, and a threaded section 10. Detailed Embodiments

[0017] To facilitate the understanding of the technical solution of the present invention, the following will be described in detail in conjunction with the drawings and specific embodiments.

[0018] Embodiment 1

[0019] As Figures 1-4 shown, a forced welding tooling for the lower support of a tower crane includes a base positioning frame 1 and a main chord connecting seat group 2;

[0020] The base positioning frame 1 is of a hollow rectangular structure, and 4 main chord connecting seat groups 2 are respectively arranged at the 4 corners of the base positioning frame 1;

[0021] As Figure 3 shown, the main chord connecting seat group 2 includes a main chord positioning support 5, a steel sleeve 6, and a pin shaft 7. The main chord positioning support 5 is located on the base positioning frame 1. There are two mounting holes with different heights on the main chord positioning support 5. A steel sleeve 6 and a pin shaft 7 are respectively installed on the two mounting holes. The steel sleeve 6 is located above the pin shaft 7, and the steel sleeve 6 and the pin shaft 7 are vertically arranged.

[0022] The main chord positioning support 5 is welded by a square steel pipe and a mounting plate 5-1, with a simple structure and good stability; there is a mounting plate 5-1 on the lower surface of the square steel pipe, and there are several positioning holes on the mounting plate 5-1. A positioning bolt 3 and a precision reamed bolt 4 are arranged in the positioning holes.

[0023] As Figure 4As shown, the positioning bolt 3 includes an equal-height positioning section 8, a support positioning section 9, and a threaded section 10. The upper and lower surfaces of the equal-height positioning section 8 are machined, which plays a role in positioning the end face of the main chord angle steel of the lower support of the tower crane. It can not only check whether the previous process is qualified, but also reduce the welding deformation of the end face of the main chord angle steel. The equal-height positioning section 8 also plays a role in positioning the position of the main chord positioning support 5. The support positioning section 9 is connected to the bottom table positioning frame 1 to position the position of the main chord positioning support 5. The function of the threaded section 10 is to fix the positioning bolt 3 to ensure the positioning dimension.

[0024] The bottom table positioning frame 1 is welded by double-layer square steel pipes and has good structural rigidity.

[0025] The steel sleeve 6 is of an integral straight steel sleeve structure, which increases the positioning stroke and improves the positioning accuracy.

[0026] In this embodiment, the forced welding of the lower supports of tower cranes with different sizes and similar structures can be carried out by replacing the main chord connecting seat group 2 and the positioning bolt 3. Through the above-mentioned tooling, it is possible to efficiently produce the lower supports of this type of tower crane that meet the interchangeability requirements and achieve mass production.

[0027] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is subject to the scope defined by the claims. Several improvements and refinements made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A forced welding tooling for the lower support of a tower crane, characterized in that It includes a base table positioning frame (1) and a main chord connection seat group (2). The base table positioning frame (1) is a hollow rectangular structure, and 4 main chord connection seat groups (2) are respectively arranged at the 4 corners of the base table positioning frame (1). The main chord connection seat group (2) includes a main chord positioning support (5), a steel sleeve (6) and a pin shaft (7). The main chord positioning support (5) is located on the base table positioning frame (1). There are two mounting holes with different heights on the main chord positioning support (5), and the steel sleeve (6) and the pin shaft (7) are respectively mounted on the two mounting holes.

2. The forced welding tooling for the lower support of the tower crane according to claim 1, wherein The lower surface of the main chord positioning support (5) has a mounting plate (5-1), and there are several positioning holes on the mounting plate (5-1). A positioning bolt (3) and a precision reamed bolt (4) are arranged in the positioning holes.

3. The forced welding tooling for the lower support of the tower crane according to claim 2, wherein The positioning bolt (3) includes an equal-height positioning section (8), a support positioning section (9) and a threaded section (10).

4. The forced welding tooling for the lower support of the tower crane according to claim 1, characterized in that, The base table positioning frame (1) is welded by double-layer square steel pipes.

5. The forced welding tooling for the lower support of the tower crane according to claim 1, wherein The steel sleeve (6) is an integral straight steel sleeve structure.

Images