Integrated lifting and anti-rolling device

Abstract

This utility model discloses an integrated lifting and anti-sway device, belonging to the field of crane anti-sway technology. The device is applied to a container gantry crane and includes four lifting mechanisms arranged at the four corners of the crane trolley. Each lifting mechanism consists of a drum, a geared motor, and a fixed pulley. The fixed pulley is mounted on the spreader frame. One end of the wire rope is fixed to the drum, and the other end passes through the fixed pulley and is fixedly connected to the trolley frame, forming an inverted triangular structure along the trolley and crane travel directions. The device uses a multi-mode variable frequency constant torque control motor to switch between lifting, lowering, and micro-motion anti-sway modes. By controlling the synchronous or differential operation of the four drums, the lifting, translation, and rotation functions of the spreader are completed. This utility model integrates lifting and anti-sway functions, and has the advantages of compact structure, light weight, simple control, low cost, and strong adaptability, effectively improving the accuracy and efficiency of container lifting operations.

Description

Technical Field

[0001] This utility model relates to the field of crane anti-sway technology, specifically to an integrated lifting anti-sway device. Background Technology

[0002] During the lifting operations of container gantry cranes in ports, the spreader often sways due to the starting, stopping, acceleration, and braking of the trolley or main crane, severely affecting operational efficiency and safety. Currently, the mainstream anti-sway solutions in the industry mainly include the following: The eight-rope winding anti-sway system uses a mechanical anti-sway structure (such as inverted triangle or equilateral triangle winding). Although it can quickly eliminate the sway of the spreader, the control program is simple and it is easy to realize the micro-motion function of the spreader, the structure has obvious defects: the mechanical structure absorbs kinetic energy, which leads to a shortened life of the wire rope, stress concentration inside the trolley frame, and the overall structure is bulky and has a high manufacturing cost.

[0003] The four-rope winding anti-sway system uses a rectangular winding pattern for its wire ropes, resulting in low suspension stiffness and reliance on complex electronic anti-sway algorithms for its anti-sway function. Its advantages include light weight and long wire rope life, but it suffers from complex control logic, low positioning accuracy, and difficulty in rotating the spreader when gripping or releasing containers.

[0004] In the existing technology, there is also a "full-function trolley" solution, which, while retaining the advantages of the four-rope structure, achieves separation of anti-sway and positioning functions by adding four auxiliary three-in-one reduction motors, an auxiliary drum, and four movable pulleys on the lifting device. However, this solution requires separate hoisting and anti-sway mechanisms, resulting in complex structure, heavy equipment, high cost, and a complex control system prone to failure.

[0005] In addition, the existing anti-sway structures also have shortcomings in the connection method between the wire rope and the lifting device: the fixed connection method causes the wire rope to be subjected to concentrated force and is prone to wear; the pulley suspension method has poor lifting stability due to unreasonable path design.

[0006] Therefore, there is an urgent need for a lifting anti-sway device that is compact in structure, easy to control, has excellent anti-sway effect, and is cost-controllable, in order to solve many problems existing in the current technology. Utility Model Content

[0007] To overcome the shortcomings of the prior art, this utility model provides an integrated lifting and anti-sway device, specifically achieving the following technical objectives: Improve space utilization, optimize vehicle layout, and solve the problem of large space occupation by traditional anti-sway devices; To achieve equipment lightweighting, reducing the trolley's weight and overall energy consumption; Reduce the number of parts to lower manufacturing and maintenance costs; Simplify the control system and improve equipment operational reliability; Improve anti-sway effect and operational accuracy, and achieve integrated translation and rotation functions of the spreader; Enhance control flexibility to adapt to various operating conditions.

[0008] This utility model is achieved through the following technical solution: an integrated lifting and anti-sway device applied to a container gantry crane, comprising four lifting mechanisms, which are respectively arranged at the four corners of the crane trolley; each lifting mechanism includes a drum, a geared motor, and a fixed pulley, the fixed pulley being installed on the spreader frame, one end of a wire rope being fixed to the drum, and the other end passing through the corresponding fixed pulley and being fixedly connected to the trolley frame; along the trolley running direction and the crane running direction, the four wire ropes form an inverted triangular structure with the trolley frame; by controlling the synchronous winding / unwinding or differential operation of the four drums, the lifting, lowering, translation, and rotation functions of the spreader are realized.

[0009] Furthermore, the fixed pulleys on the upper frame of the lifting device are arranged asymmetrically or crosswise to increase the fine-tuning range and improve the accuracy of the operation.

[0010] Furthermore, the fixed ends of the wire rope and the trolley frame are in a vertical or skewed state, which can be flexibly adjusted according to actual operational needs.

[0011] Furthermore, the geared motor is a multi-mode variable frequency constant torque control motor, which can switch between lifting mode and micro-motion anti-sway mode to meet the functional requirements of different operation stages.

[0012] Furthermore, it also includes a weight sensor, which is installed at the connection end between the wire rope and the trolley frame to monitor the stress state of the wire rope in real time and ensure operational safety.

[0013] The beneficial effects of this utility model are: integrated function: it realizes the integrated design of lifting, lowering, translation, rotation and anti-sway functions of the lifting device, which greatly improves the operation accuracy and efficiency and meets the operation requirements of precise alignment; Compact and lightweight structure: The main lifting mechanism and anti-sway mechanism are integrated into the design, reducing the number of heavy components such as four sets of geared motors and anti-sway drums, effectively reducing the weight of the trolley, saving trolley space, and reducing the requirements for wheel pressure and overall energy consumption. Significant cost advantages: It eliminates the need for expensive components such as the three-in-one motor and anti-sway drum, which are not required to be equipped with separate anti-sway devices, thus reducing equipment procurement costs; at the same time, the lighter weight of the equipment reduces the requirements for the trolley's drive power, further saving energy consumption costs and equipment operating costs; Simplified and reliable control: The main method of mechanical anti-sway is adopted, supplemented by electrical fine-tuning. This reduces the number of mechanisms and connections between components, reduces the dependence on complex control algorithms, facilitates equipment installation, debugging and maintenance, reduces the probability of equipment failure, and improves operational reliability. Highly adaptable: Through the coordinated micro-motion control of four drums, it can realize translation and rotation functions in multiple directions, and is suitable for various working conditions such as container loading and unloading in ports. It is flexible in control and highly adaptable. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view of the utility model with the rope in a vertical position. Figure 3 This is a front view of the present invention in the tilted state of the return rope; Figure 4 This is a left view of the present invention; Figure 5 This is a top view of the symmetrical layout of the lifting mechanism of this utility model; Figure 6 This is a top view of the horizontal spacing adjustable layout of this utility model; Figure 7 This is a top view of the cross-fixed pulley layout of this utility model.

[0016] In the diagram: 1. Trolley frame; 2. Drum; 3. Gear motor; 4. Fixed pulley; 5. Lifting device frame; 6. Wire rope; 21. First drum; 22. Second drum; 23. Third drum; 24. Fourth drum; 31. First gear motor; 32. Second gear motor; 33. Third gear motor; 34. Fourth gear motor; 41. First fixed pulley; 42. Second fixed pulley; 43. Third fixed pulley; 44. Fourth fixed pulley. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] like Figures 1 to 7 The integrated lifting and anti-sway device shown includes four lifting mechanisms, which are symmetrically arranged at the four corners of the trolley frame 1. Each lifting mechanism consists of a drum 2, a reduction motor 3, and a fixed pulley 4. The fixed pulley 4 is mounted on the upper frame 5 of the lifting device and is arranged asymmetrically or crosswise to increase the fine adjustment range.

[0020] One end of the wire rope 6 is fixed to the drum, and the other end passes through the corresponding fixed pulley 4 and is then fixedly connected to the trolley frame 1 via a weight sensor. The connection end between the wire rope 6 and the trolley frame 1 can be set to a vertical state according to the actual working conditions (e.g., ...). Figure 2 (as shown) or skewed state (such as) Figure 3 As shown in the figure, along the trolley running direction and the main trolley running direction, the four steel wire ropes 6 form an inverted triangular structure with the trolley frame 1, which can significantly improve the stability of the lifting process.

[0021] The core working principle of this utility model is as follows: Lifting / lowering function: The electrical system controls the synchronous operation of the reduction motors 3 of the four lifting mechanisms, driving the four drums 2 to simultaneously wind up or release the wire ropes 6, so as to achieve the smooth lifting or lowering of the lifting device; Anti-sway function: Utilizing the inverted triangular structure formed by the four steel wire ropes 6 and the trolley frame, the sway of the lifting device is suppressed by the stability of the mechanical structure itself. At the same time, in conjunction with the precise control of the variable frequency constant torque motor, the synergistic effect of mechanical anti-sway and electrical fine adjustment is achieved. Translation function: By controlling the differential operation of two sets of drums (one set for winding and one set for releasing), the spreader can be translated along the trolley's running direction or the trolley's running direction. Rotation function: By controlling the differential operation of two sets of drums set diagonally (one set for winding and one set for releasing), the spreader can rotate clockwise or counterclockwise around the central horizontal plane.

[0022] The specific control logic is as follows: Clockwise rotation: First drum 21 releases wire rope 6 + Second drum 22 retracts wire rope 6 + Third drum 23 releases wire rope 6 + Fourth drum 24 retracts wire rope 6; Counterclockwise rotation: First drum 21 retracts wire rope 6 + Second drum 22 releases wire rope 6 + Third drum 23 retracts wire rope 6 + Fourth drum 24 releases wire rope 6; Shift along the direction of the trolley: First drum 21 releases wire rope 6 + Second drum 22 releases wire rope 6 + Third drum 23 retracts wire rope 6 + Fourth drum 24 retracts wire rope 6; Translation in the opposite direction of the trolley's movement: First drum 21 retracts wire rope 6 + Second drum 22 retracts wire rope 6 + Third drum 23 releases wire rope 6 + Fourth drum 24 releases wire rope 6; Shifting along the direction of the trolley's movement: First drum 21 releases wire rope 6 + Second drum 22 retracts wire rope 6 + Third drum 23 retracts wire rope 6 + Fourth drum 24 releases wire rope 6; Shifting in the opposite direction of the trolley's movement: First drum 21 retracts 6 wire ropes + Second drum 22 releases 6 wire ropes + Third drum 23 releases 6 wire ropes + Fourth drum 24 retracts 6 wire ropes.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated lifting and anti-rolling device applied to a container gantry crane, characterized in that, It includes four lifting mechanisms, which are respectively arranged at the four corners of the crane trolley. Each lifting mechanism includes a drum, a geared motor, and a fixed pulley. The fixed pulley is installed on the upper frame of the lifting device. One end of the wire rope is fixed to the drum, and the other end passes through the corresponding fixed pulley and is fixedly connected to the trolley frame. Along the trolley running direction and the crane running direction, the four wire ropes form an inverted triangular structure with the trolley frame.

2. The integrated lifting and anti-sway device according to claim 1, characterized in that, The fixed pulleys on the upper frame of the lifting device are arranged asymmetrically or in a cross pattern.

3. The integrated lifting and anti-sway device according to claim 1, characterized in that, The wire rope is either vertical or skewed at its fixed end to the trolley frame.

4. The integrated lifting and anti-sway device according to claim 1, characterized in that, The geared motor is a multi-mode variable frequency constant torque control motor, which can switch between lifting mode and micro-motion anti-sway mode.

5. An integrated lifting and anti-sway device according to claim 1, characterized in that, It also includes a weight sensor, which is located at the connection end between the wire rope and the trolley frame.

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