Novel lower support structure of rotary assembly of tower crane

Abstract

The utility model relates to a novel lower support structure of a rotary assembly of a tower crane, and belongs to the technical field of tower cranes. Comprising a lower support box body and supporting legs, and the lower support box body and the supporting legs are combined and welded together to form a rotary lower support structure; the lower support box body comprises a ring plate, an upper cover plate, a lower cover plate and a base plate, the upper cover plate and the lower cover plate of the lower support box body are of a circular structure, a plurality of triangular lug plates extend out of the periphery of the upper cover plate, the same lug plates are arranged at the corresponding positions of the lower cover plate and the upper cover plate, and the middle of each lug plate of the lower cover plate is provided with an opening. And the supporting legs penetrate through the opening of the lower cover plate and are welded together with the lower support box body. The rotary lower support has the advantages that the box body structure of the rotary lower support is designed to be round, and the size of the box body structure is greatly reduced. Holes are formed in the four sides of a lower cover plate of the box structure, and supporting legs penetrate through the holes and are welded to the ring plate and the cover plate. Compared with the prior art, the novel structure has the advantages of simple form, small structural size, light weight and the like.

Description

Technical Field

[0001] This utility model relates to a novel lower support structure for a tower crane slewing assembly, belonging to the technical field of tower cranes. Background Technology

[0002] Most tower crane slewing assembly lower supports adopt a steel plate welded structure. This structure requires the tower crane to meet rigidity and strength requirements under various working conditions. To meet these design requirements, the traditional tower crane slewing assembly lower support box structure is designed as a square shape, which results in excessively large structural dimensions, excessive use of steel plate material, and inconvenience for transportation.

[0003] The conventional slewing assembly's lower support structure includes a lower support housing and outriggers. The lower support housing has square upper and lower cover plates, with square notches cut at the four corners of the lower cover plate. A circular ring plate is welded in the center to form the lower support housing. The outriggers are constructed from two angle steel pieces joined together. The outriggers and the square notches on the lower cover plate of the lower support housing are fitted together and welded. The upper ends of the outriggers abut against the upper cover plate of the lower support housing and are welded together, connected by a reinforcing plate and a ring plate. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a new type of tower crane slewing assembly lower support structure. The cross-section of the lower support box structure of the slewing assembly is designed to be circular, which greatly reduces the structural volume.

[0005] This utility model is achieved through the following technical solution: a novel tower crane slewing assembly lower support structure, including a lower support housing and outriggers, wherein the lower support housing and outriggers are welded together to form a slewing lower support structure; the lower support housing includes a ring plate, an upper cover plate, a lower cover plate, and a pad plate, wherein the upper cover plate and the lower cover plate of the lower support housing adopt a circular structure, and several triangular lugs extend around the upper cover plate, and the lower cover plate is provided with the same lugs at corresponding positions as the upper cover plate, and the lugs of the lower cover plate have an opening in the middle, through which the outriggers pass and are welded together with the lower support housing.

[0006] The upper and lower cover plates are provided with four triangular lugs.

[0007] The outrigger comprises angle steel I, angle steel II, reinforcing plate I, and reinforcing plate II, which are welded together.

[0008] The weld joint between the lower support box and the support leg is also provided with stiffening plate I and stiffening plate II, which reinforce the lower support box and the support leg.

[0009] The beneficial effects of this utility model are: the circular design of the slewing lower support box structure significantly reduces the volume of the box structure. The lower cover plate of the box structure has openings on all four sides, and the support legs pass through the center of the openings and are welded to the ring plate and cover plate. Through finite element software calculations, the new slewing lower support structure meets the stiffness and strength requirements. Compared with previous products, the new structure has advantages such as simple form, small structural volume, and light weight. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a structural schematic diagram of the lower support box of this utility model;

[0013] Figure 3 This is a schematic diagram of the support leg of this utility model.

[0014] In the diagram: 1. Lower support box; 2. Support leg; 3. Rib plate I; 4. Rib plate II; 1-1. Pad plate; 1-2. Upper cover plate; 1-3. Ring plate; 1-4. Lower cover plate; 2-1. Angle steel I; 2-2. Angle steel II; 2-3. Reinforcing plate I; 2-4. Reinforcing plate II. Detailed Implementation

[0015] like Figures 1 to 2 The present invention discloses a novel tower crane slewing assembly lower support structure, characterized in that: it includes a lower support housing 1 and a support leg 2, which are welded together to form a slewing lower support structure; the lower support housing includes a ring plate 1-3, an upper cover plate 1-2, a lower cover plate 1-4, and a pad plate 1-1; the upper cover plate 1-2 and the lower cover plate 1-4 of the lower support housing 1 adopt a circular structure; several triangular lugs extend from the periphery of the upper cover plate 1-2; the lower cover plate 1-4 is provided with the same lugs at corresponding positions as the upper cover plate 1-2; the lugs of the lower cover plate 1-4 have an opening in the middle; and the support leg 2 passes through the opening of the lower cover plate 1-4 and is welded together with the lower support housing 1.

[0016] The upper cover plate 1-2 and the lower cover plate 1-4 are provided with four triangular lugs.

[0017] like Figure 3 The outrigger 2 shown includes angle steel I2-1, angle steel II2-2, reinforcing plate I2-3 and reinforcing plate II2-4, which are welded together.

[0018] The weld joint between the lower support box 1 and the support leg 2 is also provided with stiffening plate I3 and stiffening plate II4, which reinforce the lower support box 1 and the support leg 2.

[0019] This invention significantly reduces the volume of the housing structure. The lower cover plate 1-4 of the lower support housing 1 has openings on all four sides, and the support legs 2 pass through the middle of the openings and are welded to the ring plate 1-3 and the upper cover plate 1-2. Through finite element analysis, the new rotary lower support structure meets the requirements for stiffness and strength. Compared with previous products, the new structure has advantages such as simple form, small size, and light weight.

Claims

1. A novel lower support structure for a tower crane slewing assembly, characterized in that: The structure includes a lower support housing (1) and a support leg (2), which are welded together to form a rotating lower support structure. The lower support housing includes a ring plate (1-3), an upper cover plate (1-2), a lower cover plate (1-4), and a pad plate (1-1). The upper cover plate (1-2) and the lower cover plate (1-4) of the lower support housing (1) are circular. Several triangular ear plates extend around the upper cover plate (1-2). The lower cover plate (1-4) is provided with the same ear plates at the corresponding positions of the upper cover plate (1-2). The ear plates of the lower cover plate (1-4) have an opening in the middle. The support leg (2) passes through the opening of the lower cover plate (1-4) and is welded together with the lower support housing (1).

2. The novel tower crane slewing assembly lower support structure according to claim 1, characterized in that: The upper cover plate (1-2) and the lower cover plate (1-4) are provided with four triangular lugs.

3. The novel tower crane slewing assembly lower support structure according to claim 1, characterized in that: The outrigger (2) includes angle steel I (2-1), angle steel II (2-2), reinforcing plate I (2-3) and reinforcing plate II (2-4), which are welded together.

4. The novel tower crane slewing assembly lower support structure according to claim 1, characterized in that: The weld joints of the lower support box (1) and the support leg (2) are also provided with stiffening plate I (3) and stiffening plate II (4), which reinforce the lower support box (1) and the support leg (2).

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