A fixed spreader for the transport of large objects

Abstract

The utility model relates to heavy piece transportation technical field especially relates to a kind of fixed lifting appliance for heavy piece transportation, including lower crossbeam, the upper crossbeam of rotation connection in the upper end of lower crossbeam by pivot, the support fixedly connected to the upper end of lower crossbeam, the lug fixedly connected to the upper end of support two sides, further include transverse moving assembly, two groups of first pulley sliding frame are slidably connected in the lower end of lower crossbeam, first pulley sliding frame and the movable component between transverse moving assembly fixedly connected have connecting frame, the lower end of upper crossbeam slidably connects two groups of second pulley sliding frame, chain winch is installed in the lower end of first pulley sliding frame and second pulley sliding frame, support lower end fixedly connected with second motor;The utility model can accurately, stably adjust the horizontal spacing of two lower lifting points, can quickly adapt to goods of different length and barycenter position, ensure the balance and stability of goods when lifting, fundamentally solve the problem that traditional lifting appliance lifting point is adjusted difficultly, precision is poor.

Description

Technical Field

[0001] This utility model relates to the field of heavy haulage technology, and in particular to a fixed lifting device for heavy haulage. Background Technology

[0002] In heavy industry sectors such as wind power generation, heavy machinery manufacturing, and power equipment installation, the transportation and handling of large items (such as wind turbine blades, large tanks, and transformers) is a critical and challenging task. These goods are typically characterized by being oversized, overweight, irregularly shaped, and having an off-center center of gravity, placing extremely high demands on the safety and adaptability of lifting equipment.

[0003] Currently, the industry commonly uses fixed lifting devices or simple gantry structures for such operations. Existing typical equipment usually includes a main beam structure, with the cargo connected below by wire ropes or fixed-length lifting chains. However, this traditional method has several inherent drawbacks: First, adjusting the lifting point positions is difficult. For cargo exceeding tens of meters in length and with a center of gravity not in the center (such as wind turbine blades), the positions of two or more lifting points need to be precisely adjusted according to their actual center of gravity to prevent tilting or slippage during lifting and to ensure the cargo is level. Existing equipment mostly uses manual adjustment of wire rope length or movement of the overhead crane for rough positioning, a cumbersome and inefficient process that makes precise fine-tuning difficult and poses significant safety hazards. Second, there is a lack of proactive attitude adjustment capabilities. When loading cargo onto transport vehicles (such as hydraulic flatbed trucks), it is often necessary to position the cargo at a certain angle to the vehicle to avoid obstacles or accommodate vehicle turning. Most existing lifting devices lack this function or can only achieve this through complex multi-crane operation, which is difficult to coordinate and carries high operational risks. Third, the level of automation and integration is low. The lateral movement, lifting, and angle adjustment of existing equipment often rely on independent, non-linked control systems, sometimes even requiring manual intervention. This not only increases the workload and skill requirements for operators but also affects overall operational efficiency and accuracy due to poor coordination between the various movements.

[0004] Therefore, in view of the difficulties in adjusting the lifting points of existing spreaders, which cannot accurately adapt to the center of gravity of the cargo; the lack of active attitude adjustment function, which makes it difficult to cope with complex loading angles; low degree of automation, poor coordination of various actions, safety risks and low efficiency, a fixed spreader for heavy cargo transportation can be designed. Through highly integrated mechatronics design, an intelligent, high-precision and safe and reliable fixed spreader solution for heavy cargo transportation is provided, which greatly improves the efficiency, safety and adaptability of loading and unloading operations for heavy cargo. Utility Model Content

[0005] To overcome the problems of existing spreader lifting point adjustment difficulties, inability to accurately adapt to the center of gravity of goods; lack of active attitude adjustment function, difficulty in dealing with complex loading angles; low degree of automation, poor coordination of various actions, safety risks and low efficiency.

[0006] The technical solution of this utility model is as follows: a fixed lifting device for transporting large items, including a lower crossbeam, an upper crossbeam rotatably connected to the upper end of the lower crossbeam via a rotating shaft, a bracket fixedly connected to the upper end of the lower crossbeam, and hanging ears fixedly connected to both sides of the upper end of the bracket. It also includes a lateral movement component. Two sets of first pulley sliding frames are slidably connected to the lower end of the lower crossbeam. A connecting frame is fixedly connected between the first pulley sliding frames and the movable part of the lateral movement component. Two sets of second pulley sliding frames are slidably connected to the lower end of the upper crossbeam. A chain winch is installed at the lower end of both the first pulley sliding frames and the second pulley sliding frames. A second motor is fixedly connected to the lower end of the bracket. The output shaft of the second motor is fixedly connected to the upper crossbeam.

[0007] Preferably, the operator first connects the entire lifting device to the external lifting equipment via the lugs at the upper end of the support. Then, the lateral movement component is activated, which synchronously transmits power to the two sets of first pulley sliding frames via the connecting frame, causing them to slide at the lower end of the lower crossbeam. This precisely adjusts the distance between the two lower lifting points to match the center of gravity of the cargo. After the distance is adjusted, the chain winches at the lower ends of the first and second pulley sliding frames can be activated simultaneously or independently to lower or raise the load. When it is necessary to adjust the overall posture of the lifting device, the second motor fixed at the lower end of the support is activated. Its output shaft directly drives the upper crossbeam to rotate relative to the lower crossbeam, thereby changing the relative angle between the second pulley sliding frame on the upper crossbeam and the first pulley sliding frame on the lower crossbeam, thus achieving the posture adjustment of the cargo.

[0008] Preferably, the lateral movement assembly includes a fixed seat fixedly connected to the front or rear end face of the lower crossbeam, a ball screw mounted on the surface of the fixed seat via a bearing seat, a first motor fixedly connected to the end of the fixed seat and driven by the ball screw, a nut threadedly connected to the outer circumferential surface of the ball screw, and a mounting seat fixedly connected to the outer surface of the nut.

[0009] Preferably, the lateral movement assembly also includes a guide rail and a slider, with the fixed base fixedly connected to the surface of the guide rail, and the slider slidably connected inside the guide rail, the slider being fixedly connected to the mounting base.

[0010] Preferably, one end of the connecting frame is fixedly connected to the mounting base, and the other end of the connecting frame is fixedly connected to the first pulley sliding frame.

[0011] Preferably, a locking mechanism is also included for locking the opening angle of the upper and lower crossbeams.

[0012] Preferably, the locking mechanism includes an arc-shaped locking plate fixedly connected to the upper crossbeam, an electric push rod fixedly connected to the upper end of the lower crossbeam, and a plug rod fixedly connected to the telescopic end of the electric push rod. The arc-shaped locking plate is provided with several sets of adjustment holes that match the plug rod.

[0013] The beneficial effects of this utility model are as follows: By setting up a lateral movement assembly consisting of a ball screw, motor, guide rail, and slider, and driving the first pulley sliding frame to slide on the lower crossbeam via a connecting frame, this lifting device can accurately and smoothly adjust the horizontal distance between the two lower lifting points. This mechanism responds quickly and positions accurately, and can quickly adapt to goods of different lengths and center of gravity positions, ensuring the balance and stability of the goods during lifting. It fundamentally solves the problems of difficult lifting point adjustment and poor accuracy of traditional lifting devices. By driving the upper crossbeam to rotate relative to the lower crossbeam with the second motor, this lifting device can form a controllable angle between the upper crossbeam and the second pulley sliding frame on it and the lower crossbeam. This feature allows the spreader to actively adjust the spatial posture of the lifted goods, making it particularly suitable for complex situations requiring loading goods onto transport vehicles at specific angles. It avoids the hassle and risks of coordinating multiple devices, significantly expanding the spreader's application scenarios. It integrates three main functions: lateral movement, independent lifting (via a chain winch), and angle rotation, and enables centralized control. Operators can adjust the lifting point position and spreader angle with a single button or sequentially according to the goods' condition via the control system, greatly simplifying the operation process, reducing reliance on operator experience, and improving overall work efficiency and safety. The locking mechanism is a crucial safety feature. Once the upper and lower crossbeams are adjusted to the required angle, the electric push rod drives the insert rod into the corresponding adjustment hole on the arc-shaped locking plate, reliably locking the relative position and preventing angle changes due to external forces or vibrations during lifting, ensuring absolute safety under heavy loads. Attached Figure Description

[0014] Figure 1 The diagram shown is a three-dimensional structural schematic of Embodiment 1 of the fixed lifting device for transporting large items according to this utility model; Figure 2 The diagram shown is a three-dimensional structural schematic of the lateral movement component in the fixed lifting device for transporting large items according to this utility model. Figure 3 The diagram shown is a three-dimensional structural schematic of Embodiment 2 of the fixed lifting device for transporting large items according to this utility model; Figure 4 The diagram shown is a three-dimensional structural schematic of the locking mechanism in the fixed lifting device for transporting large items according to this utility model. Explanation of reference numerals in the attached drawings: 1. Lower crossbeam; 2. Upper crossbeam; 3. Bracket; 4. Hanging lug; 5. Lateral movement assembly; 501. Fixed seat; 502. Ball screw; 503. First motor; 504. Nut; 505. Mounting seat; 506. Guide rail; 507. Slider; 6. First pulley sliding frame; 7. Connecting frame; 8. Second pulley sliding frame; 9. Chain winch; 10. Second motor; 11. Locking mechanism; 111. Arc-shaped locking plate; 112. Electric push rod; 113. Insert rod; 114. Adjustment hole. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example 1 Please see Figure 1 and Figure 2 This utility model provides an embodiment: a fixed lifting device for transporting large items, including a lower crossbeam 1, an upper crossbeam 2 rotatably connected to the upper end of the lower crossbeam 1 via a rotating shaft, a bracket 3 fixedly connected to the upper end of the lower crossbeam 1, and hanging ears 4 fixedly connected to both sides of the upper end of the bracket 3. It also includes a lateral movement component 5. Two sets of first pulley sliding frames 6 are slidably connected to the lower end of the lower crossbeam 1, and a connecting frame 7 is fixedly connected between the first pulley sliding frames 6 and the movable parts of the lateral movement component 5. Two sets of second pulley sliding frames 8 are slidably connected to the lower end of the upper crossbeam 2. A chain winch 9 is installed at the lower end of both the first pulley sliding frames 6 and the second pulley sliding frames 8. A second motor 10 is fixedly connected to the lower end of the bracket 3, and the output shaft of the second motor 10 is fixedly connected to the upper crossbeam 2 for lateral movement. Component 5 includes a fixed seat 501 fixedly connected to the front or rear end face of the lower crossbeam 1, a ball screw 502 mounted on the surface of the fixed seat 501 via a bearing seat, a first motor 503 fixedly connected to the end of the fixed seat 501 and drivenly connected to the ball screw 502, a nut 504 threadedly connected to the outer circumferential surface of the ball screw 502, and a mounting seat 505 fixedly connected to the outer surface of the nut 504. The transverse movement component 5 also includes a guide rail 506 and a slider 507. The fixed seat 501 is fixedly connected to the surface of the guide rail 506, and the slider 507 is slidably connected inside the guide rail 506. The slider 507 is fixedly connected to the mounting seat 505. One end of the connecting frame 7 is fixedly connected to the mounting seat 505, and the other end of the connecting frame 7 is fixedly connected to the first pulley sliding frame 6.

[0017] During operation, the operator first connects the entire lifting device to the external lifting equipment via the lugs 4 at the upper end of the bracket 3. Then, the first motor 503 in the lateral movement assembly 5 is started, driving the ball screw 502 to rotate. This causes the nut 504, threaded onto it, to move axially. The nut 504 drives the mounting base 505 to move together. The mounting base 505 is fixedly connected to the slider 507, ensuring smooth sliding along the guide rail 506. The movement of the mounting base 505 is synchronously transmitted to the two sets of first pulley sliding frames 6 via the connecting frame 7, causing them to move downwards... The lower end of the crossbeam 1 slides, thereby precisely adjusting the distance between the two lower lifting points to match the center of gravity of the goods. After the distance is adjusted, the chain winch 9 at the lower end of the first pulley sliding frame 6 and the second pulley sliding frame 8 can be started simultaneously or independently to lower or raise the heavy objects. When it is necessary to adjust the overall posture of the lifting device, the second motor 10 fixed at the lower end of the bracket 3 is started. Its output shaft directly drives the upper crossbeam 2 to rotate relative to the lower crossbeam 1, thereby changing the relative angle between the second pulley sliding frame 8 on the upper crossbeam 2 and the first pulley sliding frame 6 on the lower crossbeam 1, so as to realize the posture adjustment of the goods.

[0018] Example 2 Please see Figures 2-4 The difference from Embodiment 1 is that this embodiment also includes a locking mechanism 11 for locking the opening and closing angle between the upper crossbeam 2 and the lower crossbeam 1. The locking mechanism 11 includes an arc-shaped locking plate 111 fixedly connected to the upper crossbeam 2, an electric push rod 112 fixedly connected to the upper end of the lower crossbeam 1, and a plug rod 113 fixedly connected to the telescopic end of the electric push rod 112. The arc-shaped locking plate 111 is provided with a number of adjustment holes 114 that match the plug rod 113.

[0019] When the second motor 10 drives the upper crossbeam 2 to rotate, thereby causing the arc-shaped locking plate 111 fixedly connected to it to rotate to the required angle, the electric push rod 112 fixedly connected to the upper end of the lower crossbeam 1 is activated. Its telescopic end pushes the insertion rod 113 to extend and precisely insert into the corresponding adjustment hole 114 on the arc-shaped locking plate 111. This action rigidly locks the upper crossbeam 2 and the lower crossbeam 1 at this specific opening and closing angle, preventing the angle from changing due to external force or vibration during the hoisting of heavy objects, which greatly enhances the safety and stability of the operation. The working process of the other components, including the lateral movement assembly 5, the first pulley sliding frame 6, the second pulley sliding frame 8 and the chain winch 9, is the same as in Embodiment 1, which together realize the integrated operation of adjusting the lifting point spacing, lifting the cargo and adjusting the posture.

[0020] Through the above steps, by setting up a lateral movement assembly 5 consisting of a ball screw 502, a motor, a guide rail 506, and a slider 507, and driving the first pulley sliding frame 6 to slide on the lower crossbeam 1 via the connecting frame 7, this lifting device can accurately and smoothly adjust the horizontal distance between the two lower lifting points. This mechanism responds quickly and positions accurately, and can quickly adapt to goods of different lengths and center of gravity positions, ensuring the balance and stability of the goods during lifting. It fundamentally solves the problems of difficult lifting point adjustment and poor accuracy of traditional lifting devices. By driving the upper crossbeam 2 to rotate relative to the lower crossbeam 1 via the second motor 10, this lifting device can form a gap between the upper crossbeam 2 and the second pulley sliding frame 8 on it and the lower crossbeam 1. The controllable angle function allows the spreader to actively adjust the spatial posture of the lifted goods, making it particularly suitable for complex situations where goods need to be loaded onto transport vehicles at a specific angle. This avoids the trouble and risks of coordinating multiple devices, significantly expanding the application scenarios of the spreader. It integrates three major functions: lateral movement, independent lifting (via chain winch 9), and angle rotation, and can achieve centralized control. Operators can adjust the lifting point position and spreader angle with one click or in sequence according to the condition of the goods through the control system, greatly simplifying the operation process, reducing the dependence on operator experience, and improving overall operation efficiency and safety. The locking mechanism 11 is a key safety guarantee. Once the upper and lower crossbeams 1 are adjusted to the required angle, the electric push rod 112 drives the insert rod 113 to insert into the corresponding adjustment hole 114 on the arc-shaped locking plate 111, which can reliably lock the relative position and prevent the angle from changing due to external force or vibration during the hoisting process, thus ensuring absolute safety under heavy load conditions. This solves the problems of existing lifting tools having difficulty adjusting the lifting points, being unable to accurately adapt to the center of gravity of the goods, lacking active attitude adjustment function, being unable to cope with complex loading angles, having low automation, poor coordination of various actions, and having safety risks and low efficiency.

[0021] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention 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 the present invention.

Claims

1. A fixed lifting device for transporting large items, comprising a lower crossbeam (1), an upper crossbeam (2) rotatably connected to the upper end of the lower crossbeam (1) via a pivot, a bracket (3) fixedly connected to the upper end of the lower crossbeam (1), and lugs (4) fixedly connected to both sides of the upper end of the bracket (3), characterized in that: It also includes a lateral movement component (5), two sets of first pulley sliding frames (6) are slidably connected to the lower end of the lower crossbeam (1), a connecting frame (7) is fixedly connected between the first pulley sliding frame (6) and the movable part of the lateral movement component (5), two sets of second pulley sliding frames (8) are slidably connected to the lower end of the upper crossbeam (2), a chain winch (9) is installed at the lower end of both the first pulley sliding frame (6) and the second pulley sliding frame (8), a second motor (10) is fixedly connected to the lower end of the bracket (3), and the output shaft of the second motor (10) is fixedly connected to the upper crossbeam (2).

2. The fixed lifting device for transporting large items according to claim 1, characterized in that: The lateral movement assembly (5) includes a fixed seat (501) fixedly connected to the front or rear end face of the lower crossbeam (1), a ball screw (502) mounted on the surface of the fixed seat (501) via a bearing seat, a first motor (503) fixedly connected to the end of the fixed seat (501) and drivenly connected to the ball screw (502), a nut (504) threadedly connected to the outer circumferential surface of the ball screw (502), and a mounting seat (505) fixedly connected to the outer surface of the nut (504).

3. A fixed lifting device for transporting large items according to claim 2, characterized in that: The lateral movement assembly (5) also includes a guide rail (506) and a slider (507). The fixed base (501) is fixedly connected to the surface of the guide rail (506), and the slider (507) is slidably connected inside the guide rail (506). The slider (507) is fixedly connected to the mounting base (505).

4. A fixed lifting device for transporting large items according to claim 2, characterized in that: One end of the connecting frame (7) is fixedly connected to the mounting base (505), and the other end of the connecting frame (7) is fixedly connected to the first pulley sliding frame (6).

5. A fixed lifting device for transporting large items according to claim 1, characterized in that: It also includes a locking mechanism (11) for locking the opening and closing angle between the upper crossbeam (2) and the lower crossbeam (1).

6. A fixed lifting device for transporting large items according to claim 5, characterized in that: The locking mechanism (11) includes an arc-shaped locking plate (111) fixedly connected to the upper crossbeam (2), an electric push rod (112) fixedly connected to the upper end of the lower crossbeam (1), and a plug rod (113) fixedly connected to the telescopic end of the electric push rod (112). The arc-shaped locking plate (111) is provided with several sets of adjustment holes (114) that match the plug rod (113).

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