CN204434130U - Lifting mechanism of tower crane maintenance crane - Google Patents

Abstract

The utility model discloses a kind of lifting mechanism of tower crane maintenance crane, belong to tower crane maintenance technique field.Comprise slewing tower (1), base section (4), transition segment (5) and arm (6); Described slewing tower (1) is connected with described transition segment (5) by bearing connection (2); Installed fixing after described transition segment (5) and described base section (4) are firmly connected by bearing support (3); Described slewing tower (1) installs jack I (7) after being connected with arm (6) by bearing pin between.This lifting mechanism of tower crane maintenance crane significantly improves the processing safety of maintenance crane and property easy to use in the lifting mechanism maintenance of tower crane, provide processing safety and convenient and swift property, save construction cost, significantly improve work efficiency, structure is simple simultaneously, be convenient to dismounting and transport, space availability ratio is high.

Description

Tower Crane Hoisting Mechanism Maintenance Crane

technical field

The utility model relates to a hoisting mechanism maintenance crane of a tower crane, which belongs to the technical field of tower crane maintenance.

Background technique

During the long-term use of the lifting mechanism of the tower crane, due to various factors, the lifting motor is prone to failure. When it needs to be maintained, especially when the motor is replaced, due to the heavy weight of the lifting motor and the high-altitude operation, An auxiliary device is required for removal and replacement. The higher the lifting height, the more difficult the maintenance of the tower crane, especially the removal and replacement of the motor of the lifting mechanism.

The maintenance crane of the tower crane can provide convenience for the maintenance and maintenance of the tower crane. In the existing design, as shown in Figure 1, it is the structural form of the maintenance crane that is currently used more. This maintenance crane is also called a right-angle arm. Its structure is mainly composed of a cantilever bracket 1-1, a cantilever beam 1-2 and The pulley block 1-3 consists of three parts. When the right-angle arm is installed and used, the cantilever bracket 1-1 is first connected and fixed on the balance arm structure or the chassis of the hoisting mechanism, and then the cantilever beam 1-2 is plugged into the cantilever bracket 1-1 for connection and fixing.

The maintenance crane of the above-mentioned existing structure has a simple structure and a single form, and cannot realize the amplitude of the hoisting weight. The installation position of the maintenance crane and the lifting mechanism is relatively fixed, and the lifting versatility and space utilization are low, and the interchangeability is poor; -2 and the cantilever bracket 1-1 adopt a sliding method of rotation, which is difficult to rotate, low in rotation positioning accuracy, poor in effect and lack of effective lubrication, and the joint surface is prone to rust and cannot be rotated; at the same time, during disassembly and installation When the motor is raised, the cantilever beam 1-2 cannot be positioned effectively, and the cantilever beam 1-2 has a certain rotational inertia when hoisting, which has potential safety hazards and increases the difficulty of replacement and maintenance. Therefore this conventional maintenance hoisting directly affects the safety and convenience of maintenance and use, resulting in low work efficiency.

Utility model content

Aiming at the problems existing in the above-mentioned prior art, the utility model provides a maintenance crane for the hoisting mechanism of a tower crane, which realizes the variable amplitude of the hoisting weight, facilitates rotation, significantly improves the operation safety and convenience of the maintenance crane, and greatly improves the working efficiency. efficiency.

In order to achieve the above purpose, the hoisting mechanism maintenance crane of the tower crane includes a slewing tower body, a foundation section, a transition section and a boom;

The slewing tower body is connected with the transition section through a bearing connector;

After the transition section is firmly connected with the base section, it is installed and fixed by a support frame;

After the slewing tower body is connected with the boom through a pin shaft, an inverted chain I is installed between the two.

Further, the bearing connecting piece is positioned by bolts.

Further, the chain I is a 3 ton chain.

Further, the horizontal distance between the centerline of the revolving tower body and the hook is less than or equal to 1.8 meters;

The horizontal elevation angle of the boom is greater than 10 degrees.

Further, the hoist II suspended at the end of the boom is a 2-ton hoist.

Compared with the prior art, the beneficial effects of the hoisting mechanism maintenance crane of the tower crane are:

1. Easy to change amplitude. The maintenance crane can achieve variable amplitude by hanging the boom with the reverse chain, and can lift heavy objects within a certain range. Therefore, the maintenance crane does not need strict requirements and controls on the installation position, and the interference between the maintenance crane and other structural parts can be avoided to a certain extent. Especially for the occasion where one maintenance crane takes care of two or more mechanisms, the advantage of this maintenance crane is very obvious.

2. Excellent structure. The end of the boom of the maintenance crane is hinged with the slewing tower body through a pin shaft, and the structure is kept stable by pulling up the chain and the upper end of the slewing tower near the front end. Compared with the rib support structure, this structure greatly improves the stress condition of the structure. Therefore, for the maintenance crane with the same tonnage, the boom of the maintenance crane can use more material-saving profiles. At the same time, because the chain link is more flexible than the rib plate, it has good cushioning performance for instantaneous load and sudden unloading.

3. Easy to rotate. The slewing tower has high slewing positioning accuracy and can ensure safe operation at the same time. In this way, it is almost realized in the design that heavy objects can be lifted freely and safely within the maintenance coverage of the maintenance crane, which greatly expands the scope of use of the maintenance crane and makes the maintenance crane fully and effectively utilized.

The hoisting mechanism maintenance crane of the tower crane significantly improves the operation safety and convenience of the maintenance crane in the maintenance and maintenance of the hoisting mechanism of the tower crane, provides operation safety and convenience, and saves construction costs. The work efficiency is greatly improved, and at the same time, the structure is simple, easy to disassemble and transport, and the space utilization rate is high.

Description of drawings

Fig. 1 is the schematic diagram of maintenance crane structure in the prior art;

Fig. 2 is a structural representation of the utility model;

In the figure: 1-1, cantilever bracket, 1-2, cantilever beam, 1-3, pulley block, 1, slewing tower body, 2, bearing connector, 3, support frame, 4, foundation section, 5, transition section, 6. Boom, 7. Reverse chain I, 8. Reverse chain II.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in FIG. 2 , the hoisting mechanism maintenance crane of the tower crane includes a slewing tower body 1 , a foundation section 4 , a transition section 5 and a boom 6 .

The structural principle of the hoisting mechanism maintenance crane of the tower crane is:

The slewing tower body 1 is connected with the transition joint 5 through the bearing connector 2; the slewing effect of the slewing tower body 1 is realized.

After the transition section 5 is firmly connected with the base section 4, it is installed and fixed through the support frame 3; through the support frame 3, it is fixed on the underframe of the hoisting mechanism.

After the slewing tower body 1 is connected with the boom 6 through a pin shaft, an inverted chain I7 is installed between the two. The amplitude-changing effect of the boom 6 is realized by adjusting the chain link I7.

Further, the bearing connector 2 is positioned by bolts. When the revolving tower body 1 is rotated to a designated position, the bearing connector 2 is locked by bolts to make it fixed, and then the revolving tower body 1 is locked and positioned.

Further, the chain-winding I7 is a 3-ton chain-winding. The amplitude-changing effect of the boom 6 is realized.

Further, the horizontal distance between the centerline of the slewing tower 1 and the hook is less than or equal to 1.8 meters; the horizontal elevation angle of the boom 6 is greater than 10 degrees. Effectively ensure the working efficiency and safety and stability of the boom 6 .

Further, the hoist chain II 8 suspended at the end of the boom 6 is a 2-ton hoist chain. When hoisting, use a ground hoist of more than 2t or an inverted chain of more than 2t to work through the pulley block.

To sum up, the hoisting mechanism maintenance crane of the tower crane significantly improves the operation safety and convenience of the maintenance crane in the maintenance and maintenance of the hoisting mechanism of the tower crane, and provides operation safety and convenience. The construction cost is saved, the work efficiency is greatly improved, and the structure is simple, easy to disassemble and transport, and the space utilization rate is high.

Claims (5)

1. A hoisting mechanism maintenance crane of a tower crane, characterized in that, It includes a slewing tower body (1), a foundation section (4), a transition section (5) and a boom (6); The slewing tower body (1) is connected to the transition section (5) through a bearing connector (2); After the transition section (5) is firmly connected with the base section (4), it is installed and fixed through the support frame (3); After the slewing tower (1) is connected with the boom (6) through a pin shaft, an inverted chain I (7) is installed between the two. 2. A kind of tower crane lifting mechanism maintenance crane according to claim 1, is characterized in that, The bearing connection (2) is positioned by bolts. 3. A kind of tower crane hoisting mechanism maintenance crane according to claim 1, is characterized in that, The chain-rewinding I (7) is a 3-ton chain-rewinding. 4. A kind of tower crane hoisting mechanism maintenance crane according to claim 1, is characterized in that, The horizontal distance between the centerline of the revolving tower body (1) and the hook is less than or equal to 1.8 meters; The horizontal elevation angle of the boom (6) is greater than 10 degrees. 5. A kind of tower crane lifting mechanism maintenance crane according to claim 1, is characterized in that, The hanging chain II (8) at the end of the boom (6) is a 2 ton chain falling.