Small-radius superlift counterweight pushing device and crawler crane thereof

Abstract

The utility model discloses a small-radius superlift counterweight pushing device and a crawler crane thereof, the small-radius superlift counterweight pushing device comprises the superlift counterweight pushing device, and the superlift counterweight pushing device comprises a superlift counterweight lifting oil cylinder, a sliding trolley and a superlift counterweight pushing oil cylinder which are connected in sequence. The utility model provides a small-radius (13m-14m) superlift counterweight pushing device which meets the construction requirements of a crawler crane in a narrow space.

Description

Technical Field

[0001] This utility model relates to the field of crane equipment, and in particular to a small-radius super-lift counterbalanced moving device and its crawler crane. Background Technology

[0002] Crawler cranes are among the most common types of cranes, frequently used for lifting large workpieces. To enhance their lifting capacity, large crawler cranes are typically equipped with a superlift mode. In superlift mode, the superlift counterweight is pushed twenty or even tens of meters away from the center of rotation, resulting in a dramatic increase in the crane's turning radius. In open areas, the crane's turning radius is not critical, but in confined spaces, it directly restricts the use of superlift mode. Furthermore, in some lifting applications, such as wind power installations, the crane's turning radius directly affects the area of ​​the foundation that needs to be leveled; a smaller turning radius improves the crane's economic efficiency.

[0003] In existing technologies, the superlift counterweight is suspended by a superlift counterweight suspension plate, and its working radius is adjusted by a superlift counterweight pushing device. This pushing device typically uses a folding boom with a pushing cylinder. Its typical configuration involves a front pushing support hinged to a rear pushing support, a rear pushing support hinged to the rear of the turntable, and a front pushing support hinged to the superlift counterweight suspension plate. The pushing cylinder is installed between the two supports; the cylinder's extension and retraction causes the two supports to open and close, resulting in a change in the distance between the superlift counterweight and the turntable, i.e., adjusting the superlift counterweight's working radius. This structure is usually designed to achieve a large working radius for the superlift counterweight; due to structural limitations, it cannot achieve a smaller superlift counterweight working radius (13m-14m).

[0004] Therefore, it is necessary to develop a new type of super-lift counterbalanced moving device to overcome the problem that the existing technology cannot achieve the working conditions of small-radius super-lift counterbalanced loads, that is, it cannot meet the construction needs of narrow spaces. Utility Model Content

[0005] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a small radius super-lift counterbalance pushing device and its crawler crane, providing a small radius (13m-14m) super-lift counterbalance pushing device to meet the construction needs of crawler cranes in confined spaces.

[0006] Technical solution: The present invention provides a small radius super-lift counterbalance pushing device, characterized in that: it includes a super-lift counterbalance pushing device, which comprises a super-lift counterbalance lifting cylinder, a sliding trolley, and a super-lift counterbalance pushing cylinder connected in sequence.

[0007] The sliding trolley is located on the super-lift counterweight support.

[0008] The super-lift counterweight lifting cylinder is connected to the super-lift counterweight.

[0009] The super-lift counterweight pushing cylinder is connected to the turntable, and the super-lift counterweight pushing cylinder is located above the turntable.

[0010] Tracked cranes using the small-radius super-lift counterweight pushing device of this utility model.

[0011] The crawler crane of this utility model is characterized in that it includes a super-lift counterweight support, and the two ends of the super-lift counterweight support are respectively hinged to the turntable and the super-lift counterweight suspension plate.

[0012] The turntable is located on the undercarriage and is equipped with the main boom, super-lift mast, main luffing arm and mast.

[0013] The main boom is connected to the hook, and the superlift mast is connected to the superlift luffing and main luffing tie plates.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention provides a small radius (13m-14m) super lifting counterbalance pushing device to meet the construction needs of crawler cranes in narrow spaces. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a conventional super-lift counterbalanced displacement system;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the super-lift counterbalanced weight pushing device of this utility model;

[0018] In the diagram, 1 is the hook; 2 is the main boom; 3 is the superlift mast; 4 is the main luffing device; 5 is the turntable; 6 is the undercarriage; 7 is the superlift counterweight pushing device; 71 is the superlift counterweight lifting cylinder; 72 is the superlift counterweight pushing cylinder; 73 is the sliding trolley; 8 is the mast; 9 is the superlift luffing device; 10 is the superlift counterweight; 11 is the superlift counterweight support; 12 is the superlift counterweight suspension plate; and 13 is the main luffing plate. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] The superlift counterweight shifting system of this utility model is a system used to change the working radius of the superlift counterweight, which is usually hydraulically driven.

[0021] This utility model relates to a small-radius super-lift counterbalance pushing device, comprising a super-lift counterbalance pushing device 7, which includes a super-lift counterbalance lifting cylinder 71, a sliding trolley 73, and a super-lift counterbalance pushing cylinder 72 connected in sequence. The sliding trolley 73 is located on the super-lift counterbalance support 11. The super-lift counterbalance lifting cylinder 71 is connected to the super-lift counterbalance 10. The super-lift counterbalance pushing cylinder 72 is connected to a turntable 5 and is located above the turntable 5.

[0022] The crawler crane of this utility model includes a superlift counterweight support 11, with both ends of the superlift counterweight support 11 hinged to a turntable 5 and a superlift counterweight suspension plate 12, respectively. The turntable 5 is located on a lower carriage 6 and is equipped with a main boom 2, a superlift mast 3, a main luffing 4, and a mast 8. The main boom 2 is connected to a hook 1, and the superlift mast 3 is connected to the superlift luffing 9 and the main luffing plate 13.

[0023] This invention features a specific length for the super-lift counterbalance suspension plate 12, ensuring the installed super-lift counterbalance bracket 11 is horizontal. A specific height for the turntable 5 hinge ensures the installed super-lift counterbalance push cylinder 72 is also horizontal. The super-lift counterbalance 10 is connected to the sliding trolley 73 via a lifting cylinder; the extension / retraction length of the lifting cylinder determines whether the super-lift counterbalance is off the ground. The super-lift counterbalance push cylinder 72 drives the sliding trolley 73 to move on the super-lift counterbalance bracket 11, adjusting the working radius of the super-lift counterbalance 10. The sliding trolley 73 moves to near the limit position of the turntable 5, representing the minimum working radius of the super-lift counterbalance; it moves to near the limit position of the suspension plate, representing the maximum working radius of the super-lift counterbalance. The super-lift counterbalance push cylinder 72 has a locking function to maintain the position of the sliding trolley 73 carrying the super-lift counterbalance 10 when the super-lift counterbalance bracket 11 has a 3° slope with the ground.

[0024] Superlift counterweight assisted boom raising process: After the crane components are assembled, the superlift counterweight is at its minimum working radius position, the lifting cylinder is in the extended state, and the cylinder has no pressure. The superlift luffing wire rope is retracted. When the main luffing plate force approaches its upper limit, the superlift luffing is stopped, and the lifting cylinder is compressed. When the main luffing plate force decreases by 20%, the lifting cylinder stops operating, and the superlift luffing wire rope is retracted again. This process is repeated until the superlift counterweight is off the ground, and the superlift counterweight push cylinder is extended. When the main luffing plate force decreases by 20%, the push cylinder operation stops, and the superlift luffing wire rope is retracted again. This process is repeated until the boom is raised. As the boom angle increases, the superlift counterweight push cylinder is retracted to the minimum working radius position, and the lifting cylinder is extended to ground the superlift counterweight.

[0025] Crane operation process: The workpiece rigging is connected to the hook, and the luffing wire rope is retracted. The specific lifting process is similar to that of the boom and will not be described in detail.

[0026] This invention features a pushing cylinder positioned above the turntable, preventing the cylinder housing from extending beyond the super-lift counterweight support. The four-bar linkage structure, consisting of the super-lift counterweight support, super-lift counterweight suspension plate, super-lift mast, and turntable, maintains the horizontal position of the super-lift counterweight support. This invention is a super-lift counterweight pushing device specifically designed for crawler cranes with small super-lift radii. Its simple structure adapts to confined working spaces, expanding the application scenarios of crawler cranes. When applied to work environments requiring leveled sites, it can reduce site costs.

Claims

1. A small-radius super-lift counterbalanced moving device, characterized in that: It includes a super-lift counterweight pushing device (7), which includes a super-lift counterweight lifting cylinder (71), a sliding trolley (73) and a super-lift counterweight pushing cylinder (72) connected in sequence.

2. The small-radius super-lift counterbalanced shifting device according to claim 1, characterized in that: The sliding trolley (73) is located on the super-lift counterweight support (11).

3. The small-radius super-lift counterbalanced shifting device according to claim 2, characterized in that: The super-lift counterweight lifting cylinder (71) is connected to the super-lift counterweight (10).

4. The small-radius super-lift counterbalanced shifting device according to claim 3, characterized in that: The super-lift counterweight push cylinder (72) is connected to the turntable (5), and the super-lift counterweight push cylinder (72) is located above the turntable (5).

5. A crawler crane using the small radius super-lift counterweight pushing device according to any one of claims 1-4.

6. The crawler crane according to claim 5, characterized in that: It includes a super-lift counterweight support (11), with both ends of the super-lift counterweight support (11) hinged to the turntable (5) and the super-lift counterweight suspension plate (12), respectively.

7. The crawler crane according to claim 6, characterized in that: The turntable (5) is located on the lower vehicle (6), and the turntable (5) is equipped with the main boom (2), the super-lift mast (3), the main luffing (4) and the mast (8).

8. The crawler crane according to claim 7, characterized in that: The main boom (2) is connected to the hook (1), and the superlift mast (3) is connected to the superlift luffing (9) and the main luffing plate (13).

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