A guide device for tower crane sleeve frame climbing

Abstract

The utility model discloses a kind of guiding device for tower crane sleeve frame climbing, to solve the poor adaptability of existing guiding device to round pipe main chord, the problem that structure is scattered and leads to large assembly error, sleeve frame climbing is easy to deviate and jam;The device includes sleeve frame, tower and the guiding mechanism being set between the two;The guiding mechanism includes the guiding wheel mechanism being fixed to the outer periphery of tower round pipe main chord, and the angle steel guiding track being fixed to the surface of sleeve frame round pipe main chord, the guiding wheel mechanism includes support plate and guiding wheel being installed on by pin shaft, the outer periphery of this guiding wheel is equipped with two mutually perpendicular rolling surfaces, when sleeve frame is sleeved on tower, two rolling surfaces of guiding wheel simultaneously with the outside plane rolling of angle steel, realize horizontal bidirectional limiting, the utility model is optimized by layout and integrated design, significantly improve the adaptability to round pipe main chord, guiding precision and installation efficiency, and structure is stable, long service life.

Description

Technical Field

[0001] This utility model relates to the technical field of tower crane (tower crane) jacking system, specifically to a guide device used to provide precise guidance and horizontal limit for the frame during tower crane jacking operations. Background Technology

[0002] Tower cranes are used in construction to increase the height of the tower through jacking operations. During this process, the crane frame needs to climb smoothly and precisely along the main chord of the tower. The guiding device is a key component to ensure the safety and success of this process.

[0003] Existing tower crane guiding devices suffer from the following main shortcomings: First, poor adaptability. Most traditional guiding devices are designed for square tube main chord towers. When applied to the increasingly common round tube main chord towers, the guiding components do not fit firmly against the curved tube wall, easily causing horizontal deviation and swaying during lifting, posing safety hazards. Second, fragmented structure and low installation precision. Traditional guiding devices typically consist of multiple independent guide wheels, supports, and other components, requiring dispersed installation and debugging on-site. This installation method is greatly affected by site conditions and worker skill levels, resulting in significant cumulative assembly errors. It is difficult to guarantee the coaxiality and verticality of each guiding point, easily leading to jamming, abnormal noises, and other problems during tower crane climbing, affecting lifting efficiency and equipment lifespan.

[0004] Therefore, there is an urgent need for a new type of guide device that can effectively adapt to the main chord of a circular tube, has a compact structure, and high installation accuracy. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a guiding device for tower crane frame climbing. Through optimized layout and integrated design, it significantly improves the adaptability and guiding accuracy of the circular tube main chord, simplifies the installation process, and ensures the stability of frame climbing.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a guiding device for the climbing of a tower crane frame, comprising a frame, a tower, and a guiding mechanism disposed between the two. The guiding mechanism includes a guide wheel mechanism fixed to the tower and a guide rail fixed to the frame and in rolling cooperation with the guide wheel mechanism.

[0007] The guide wheel mechanism includes a support plate fixed to the outer periphery of the main chord of the tower's circular tube, and a guide wheel rotatably mounted on the support plate via a pin. The outer periphery of the guide wheel has two mutually perpendicular rolling surfaces for rolling contact with the guide rail.

[0008] The guide rail is made of angle steel and is fixed to the surface of the main chord of the sleeve tube.

[0009] When the sleeve is fitted onto the tower, the two rolling surfaces of the guide wheel simultaneously contact the outer plane of the angle steel, forming a stable rolling pair, thereby restricting any movement of the sleeve relative to the tower in the horizontal plane, and only allowing it to rise and fall along the tower axis (vertical direction).

[0010] Furthermore, the support plate is welded and fixed to the outer 45° direction of the main chord of the tower's circular tube, and the guide rail is welded and fixed to the inner 45° direction of the main chord of the sleeve's circular tube. This symmetrical layout of the outer 45° and inner 45° cleverly utilizes the circumferential space of the main chord of the circular tube, enabling the guide wheel and the angle steel rail to achieve a tight and stable fit at the optimal angle, which is particularly suitable for circular cross-sections.

[0011] Furthermore, the pin passes through the guide wheel and the bracket plate, and the end of the pin is provided with a limiting structure (such as a cotter pin, a shaft retaining ring, etc.) to prevent the guide wheel from moving axially, ensuring that the guide wheel rotates smoothly without axial displacement.

[0012] Furthermore, the guide wheel mechanism is a prefabricated integrated assembly in the factory, and the support plate is fixedly connected to the main chord of the tower by welding. Factory production ensures the precision of the guide wheel mechanism itself, while welding integration completely eliminates the errors of on-site assembly of this part.

[0013] Furthermore, the guide rail is welded and fixed only to the main chord of the circular tube in the lower half of the sleeve. This design ensures effective guidance for the sleeve throughout the climbing process, saves materials, and reduces unnecessary weight at the top of the sleeve.

[0014] Furthermore, the guide rail is made of equilateral angle steel with a diameter of ∠75×5mm. This specification of angle steel has moderate strength, is easy to obtain and process, and its outer surface provides an ideal rolling contact surface for mating with the guide wheel.

[0015] Furthermore, at least two layers of the guide wheel mechanism are arranged vertically at intervals on each main chord of the tower. This multi-layer arrangement enhances the stability of the guidance and its anti-overturning capability.

[0016] Compared with existing technologies, this invention offers the following advantages: It employs a 45° angle installation layout optimized for the main chord of a circular tube, combined with a single guide wheel featuring double rolling surfaces. This ensures the guide contact surface naturally matches the curvature of the circular tube, resulting in a tight fit and effectively limiting the horizontal displacement and rotation of the sleeve, achieving high guiding accuracy. In this invention, the guide wheel mechanism is a factory-prefabricated integrated assembly, welded integrally with the tower; the guide rail (angle steel) is directly welded to the sleeve. On-site installation only requires assembling the sleeve, eliminating the need to install and debug individual guide components, greatly simplifying the installation process, shortening working hours, and avoiding on-site assembly errors. In this invention, the pin shaft serves as both a rotation axis and an auxiliary limiter, ensuring smooth rotation of the guide wheel without axial movement. The optimized rolling contact method reduces abnormal wear, significantly extending the overall service life of the guiding device and reducing maintenance frequency and costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 for Figure 1 A partial top-view structural diagram of region A in the middle.

[0020] Figure 3 This is a side view of the guide wheel mechanism in this utility model.

[0021] Figure 4 This is a top view of the guide wheel mechanism in this utility model.

[0022] Figure 5 This is a schematic diagram of the lifting process of the frame in this utility model. Figure 1 .

[0023] Figure 6 This is a schematic diagram of the lifting process of the frame in this utility model. Figure 2 .

[0024] Figure 7 This is a schematic diagram of the lifting process of the frame in this utility model. Figure 3 .

[0025] In the diagram: 1 is the frame, 2 is the tower, 3 is the guide wheel mechanism, 31 is the support plate, 32 is the guide wheel, 33 is the pin, and 4 is the guide rail. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments.

[0027] like Figures 1 to 7As shown, the present invention provides a guide device for the climbing of a tower crane frame, which mainly includes a frame 1, a tower 2, and a guide mechanism composed of a guide wheel mechanism 3 and a guide rail 4.

[0028] In this embodiment, the main chord of tower 2 is a Φ133mm round tube, and the main chord of sleeve 1 is a Φ168mm round tube.

[0029] During the factory production phase of tower 2, the support plate 31 of the guide wheel mechanism 3 is securely welded to the outer 45° direction of its four circular main chord members using submerged arc welding. The guide wheel mechanism 3 is a pre-assembled integrated assembly: the guide wheels 32 are mounted on the support plate 31 via pins 33, and cotter pins (not shown in the figure) are inserted at the ends of the pins 33 to prevent movement. The outer circumference of the guide wheels 32 is machined with two mutually perpendicular rolling surfaces. On each main chord member, two layers of such guide wheel mechanisms 3 are welded at equal intervals (e.g., 1.5 meters) in the vertical direction.

[0030] During the factory production stage of frame 1, equilateral angle steel with a diameter of ∠75×5mm is welded in sections at the lower half of the inner 45° direction of its four round main chord members using carbon dioxide gas shielded welding to serve as guide rail 4. After welding, the outer contact surface of the angle steel needs to be ground to ensure its flatness.

[0031] During on-site installation, the prefabricated frame 1 is slowly lowered from above the tower 2. During this process, the guide wheels 32 welded to the tower 2 will naturally fit against the outer plane of the angle steel guide rail 4 on the frame 1 with their two vertical rolling surfaces. The gap between the two can be controlled within 0.5mm through factory prefabrication precision.

[0032] The working principle of this utility model: During the jacking operation, the sleeve 1 climbs along the tower 2 under the drive of the hydraulic cylinder. At this time, the angle steel guide rail 4 fixed on the sleeve 1 moves upward relative to the tower 2. The guide wheel 32 rotates around the pin 33 under the friction of the angle steel rail. Since the two rolling surfaces of the guide wheel 32 simultaneously constrain the angle steel rail, the movement of the sleeve 1 in the horizontal plane (X and Y directions) and its rotation around the vertical axis are effectively restricted, thereby ensuring that the sleeve 1 can only rise and fall smoothly and accurately along the axial direction of the tower 2, avoiding deviation, jamming, or swaying.

[0033] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings. However, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. For example, the specifications of the angle steel of the guide rail can be adjusted according to the tower crane model; different types of retaining rings can be used for the limiting method at the pin end, etc.

Claims

1. A guiding device for the climbing of a tower crane frame, comprising a frame (1), a tower (2), and a guiding mechanism disposed between the two, characterized in that, The guiding mechanism includes a guide wheel mechanism (3) fixed to the tower (2) and a guide rail (4) fixed to the frame (1) and rollingly engaged with the guide wheel mechanism (3). The guide wheel mechanism (3) includes a support plate (31) fixed to the outer periphery of the main chord of the round tube of the tower (2) and a guide wheel (32) rotatably mounted on the support plate (31) via a pin (33). The outer periphery of the guide wheel (32) is provided with two mutually perpendicular rolling surfaces for rolling contact with the guide rail (4). The guide rail (4) is an angle steel, which is fixed to the surface of the main chord of the round tube of the sleeve (1); When the sleeve (1) is fitted onto the tower (2), the two rolling surfaces of the guide wheel (32) simultaneously contact the outer plane of the angle steel to restrict the movement of the sleeve (1) relative to the tower (2) in the horizontal plane.

2. The guide device for tower crane frame climbing according to claim 1, characterized in that, The support plate (31) is welded and fixed to the outer 45° direction of the main chord of the round tube of the tower (2), and the guide rail (4) is welded and fixed to the inner 45° direction of the main chord of the round tube of the sleeve (1).

3. The guide device for tower crane frame climbing according to claim 1, characterized in that, The pin (33) passes through the guide wheel (32) and the bracket plate (31), and the end of the pin (33) is provided with a limiting structure to prevent the guide wheel (32) from moving axially.

4. The guide device for tower crane frame climbing according to claim 1, characterized in that, The guide wheel mechanism (3) is a prefabricated integrated assembly in the factory, and the support plate (31) is fixedly connected to the main chord of the tower (2) by welding.

5. The guide device for tower crane frame climbing according to claim 1, characterized in that, The guide rail (4) is welded and fixed only to the main chord of the circular tube in the lower half of the sleeve (1).

6. The guide device for tower crane frame climbing according to any one of claims 1 to 5, characterized in that, The guide rail (4) is an equilateral angle steel with a diameter of ∠75×5mm.

7. The guide device for tower crane frame climbing according to any one of claims 1 to 5, characterized in that, At least two layers of the guide wheel mechanism (3) are arranged at vertical intervals on each main chord of the tower (2).

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