A multi-point gantry crane

Abstract

This utility model discloses a multi-point gantry crane, relating to the field of gantry crane technology. It includes two connecting pulleys, with two support rods fixedly connected to the top of each pulley. Two connecting sleeves are also fixedly connected to the top of the support rods for overall adjustment of the device's position. Two connecting grooves are formed on the side of the two connecting sleeves that are close to each other, and an adjusting rod is slidably connected between the two grooves. Adjusting components are provided on the outer wall of the adjusting rod and the inner wall of the connecting sleeves to drive the adjusting rod. This utility model uses a tension sensor located inside the lifting ring to detect the load data of each lifting point in real time and transmits the data to the control system via a wireless transmission device. The system can automatically identify uneven load distribution and control the movement of the telescopic cylinders at the corresponding positions. Through the telescopic push rod, the lifting rope is precisely limited and pushed, thereby automatically adjusting the lifting height and stress state of each lifting point.

Description

Technical Field

[0001] This utility model relates to the field of gantry crane technology, specifically a multi-point gantry crane. Background Technology

[0002] Currently, gantry cranes are widely used as an important lifting device in fields such as large component hoisting, heavy equipment handling, and steel structure construction. Traditional gantry cranes mostly use rigid structures with one or a few fixed lifting points to lift and move objects, and their structural form and hoisting method are relatively simple.

[0003] However, in actual hoisting operations, the objects to be hoisted are often characterized by their large size, irregular shape, and uneven weight distribution. Existing gantry cranes have significant shortcomings: their lifting point positions are usually fixed or have a limited adjustment range, making it impossible to flexibly and precisely adapt them to the actual center of gravity distribution of the object. During hoisting, uneven force can easily cause the object to tilt and sway, posing significant safety hazards such as disengagement and collisions, threatening operational safety. Furthermore, frequent intervention and adjustments by operators are required, severely impacting hoisting efficiency and accuracy, and failing to meet the growing demands of modern industry for intelligent and high-precision hoisting operations.

[0004] To address these issues, those skilled in the art have proposed a multi-point gantry crane to solve the problems raised in the background art. Summary of the Invention

[0005] The purpose of this utility model is to provide a multi-point gantry crane, which is a new type of gantry crane with multiple lifting points, real-time adjustment and intelligent balancing capabilities, in order to overcome the above-mentioned technical defects and adapt to complex and ever-changing lifting application scenarios.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-point gantry crane, comprising two connecting pulleys, two support rods fixedly connected to the top of the two connecting pulleys, and two connecting sleeves fixedly connected to the top of the two support rods for adjusting the overall position of the device;

[0007] Two connecting grooves are provided on the side of the two connecting sleeves that are close to each other, and an adjusting rod is slidably connected between the two connecting grooves; the outer side wall of the adjusting rod and the inner side wall of the connecting sleeve are provided with adjusting components for driving the adjusting rod to move.

[0008] The top of the adjusting slide rod is equipped with a multi-point hoisting mechanism for hoisting materials; the inner side wall of the adjusting slide rod is equipped with an adjusting mechanism for adjusting the force.

[0009] Preferably, the hoisting mechanism includes a drive motor, which is mounted in two forms on the top of the adjusting slide rod. The output end of the drive motor is fixedly connected to a connecting shaft. Multiple partition plates are fixedly connected to the outside of the connecting shaft for separation. Multiple sets of hoisting ropes are provided on the outside of the connecting shaft for hoisting. Each partition plate is fixedly connected to a support frame for supporting the connecting shaft.

[0010] Preferably, a lifting ring is fixedly connected to the bottom end of the lifting rope for lifting goods, a tension sensor is installed on the inner side of the lifting ring for detecting gravity, and a wireless transmitter is installed on the outer side wall of the lifting ring for wirelessly transmitting gravity data.

[0011] Preferably, the adjustment mechanism includes a connecting groove, which is formed in multiple ways on the inner side wall of the adjustment slide rod. A telescopic cylinder is also installed in the connecting groove. The output end of the telescopic cylinder is fixedly connected to a telescopic push rod. The front end of the telescopic push rod is arc-shaped and has protruding plates on both sides for limiting and pushing the hoisting rope.

[0012] Preferably, a wireless transmission head is inserted at the rear end of the telescopic cylinder for controlling the operation of the telescopic cylinder, and the wireless transmission head is also wirelessly connected to a second wireless transmission head.

[0013] Preferably, the adjustment assembly includes a support base plate, which is fixedly connected to the bottom end of the adjustment slide rod. A second drive motor is installed on the top of the support base plate, and a connecting gear is fixedly connected to the output end of the second drive motor. The connecting slide sleeve also has a connecting tooth groove near the bottom end of the connecting slide groove for meshing with the connecting gear.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model uses a tension sensor installed inside the lifting ring to monitor the load data of each lifting point in real time, and transmits the data to the control system via a wireless transmission device. The system can automatically identify uneven load distribution and control the telescopic cylinders at the corresponding positions to precisely limit and push the lifting rope through the telescopic push rod, thereby automatically adjusting the lifting height and stress state of each lifting point. This design effectively eliminates the problems of uneven loading and tilting caused by irregular cargo shape or center of gravity shift, greatly improving the stability and safety of lifting operations, and realizing a leap from passive load bearing to active intelligent leveling.

[0016] 2. This utility model adopts a unique movable multi-point lifting mechanism. Through the drive motor two, the connecting gear engages with the connecting tooth groove at the bottom of the connecting sleeve, driving the entire adjusting slide rod to move smoothly along the connecting groove, thereby easily adjusting the lateral position of the lifting point group. Combined with multiple independently retractable lifting ropes controlled by the drive motor one, this lifting device can quickly adapt to goods of different sizes, shapes, and lifting requirements. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This utility model Figure 1 A schematic diagram of the structure of the adjusting slide bar;

[0020] Figure 3 This utility model Figure 2 A cross-sectional view of the adjusting slide bar;

[0021] Figure 4 This utility model Figure 3 A detailed structural diagram of the lifting ring;

[0022] Figure 5 This utility model Figure 1 A cross-sectional view of the connecting groove.

[0023] In the picture:

[0024] 1. Connecting pulley; 11. Support rod; 12. Connecting sleeve; 2. Connecting slide groove; 21. Adjusting slide rod; 22. Connecting tooth groove; 23. Drive motor one; 24. Connecting shaft; 25. Divider plate; 26. Support frame; 27. Lifting rope; 28. Lifting ring; 3. Support base plate; 31. Drive motor two; 32. Connecting gear; 4. Connecting groove; 41. Telescopic cylinder; 42. Wireless transmission head one; 43. Telescopic push rod; 44. Wireless transmission head two; 45. Tension sensor. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To be continued Figure 5 As shown:

[0027] Example 1: This utility model provides a multi-point gantry crane, including two connecting pulleys 1, two support rods 11 fixedly connected to the top of the two connecting pulleys 1, and two connecting sleeves 12 fixedly connected to the top of the two support rods 11 for adjusting the overall position of the device;

[0028] Two connecting grooves 2 are provided on one side of the two connecting sleeves 12 that are close to each other, and an adjusting rod 21 is slidably connected between the two connecting grooves 2; the outer side wall of the adjusting rod 21 and the inner side wall of the connecting sleeve 12 are provided with adjusting components for driving the adjusting rod 21 to move.

[0029] The top of the adjusting slide bar 21 is provided with a multi-point hoisting mechanism for hoisting materials; the inner side wall of the adjusting slide bar 21 is provided with an adjusting mechanism for adjusting the force.

[0030] During operation, the staff first use external power to pull the connecting pulley 1 to move the entire device to the work area. The rigid support formed by the support rod 11 and the connecting sleeve 12 provides stable support for the entire lifting device and allows the adjusting slide rod 21 to slide in the connecting slide groove 2, laying the structural foundation for the subsequent lateral adjustment of the lifting point.

[0031] 1. In one embodiment of the present invention, the hoisting mechanism includes a drive motor 23, two drive motors 23 are mounted on the top of the adjusting slide rod 21, the output end of the drive motor 23 is fixedly connected to a connecting shaft 24, a plurality of partition plates 25 are fixedly connected to the outside of the connecting shaft 24 for separation, a plurality of hoisting ropes 27 are provided on the outside of the connecting shaft 24 for hoisting, and a support frame 26 is fixedly connected to the outside of each partition plate 25 for supporting the connecting shaft 24.

[0032] During operation, the operator first starts the drive motor 23, which drives the connecting shaft 24 to rotate synchronously, thereby winding or releasing multiple sets of lifting ropes 27. Multiple partition plates 25 divide the effective working area of ​​the connecting shaft 24 into multiple independent sections, ensuring that each lifting rope 27 is arranged in an orderly manner and does not interfere with each other during the winding and unwinding process. At the same time, the support frame 26 enhances the bending strength of the connecting shaft 24, ensuring its rotational stability and structural reliability under heavy load.

[0033] 2. In one embodiment of the present invention, a lifting ring 28 is fixedly connected to the bottom end of the lifting rope 27 for lifting goods. A tension sensor 45 is also installed on the inner side of the lifting ring 28 for detecting gravity. A wireless transmission head 44 is installed on the outer side wall of the lifting ring 28 for wirelessly transmitting gravity data.

[0034] During operation, the worker first attaches the lifting ring 28 to the lifting point or pallet of the goods; the tension sensor 45 senses and measures the load it bears in real time, and continuously transmits the gravity data to the outside in the form of wireless signal through the wireless transmitter 44, providing the system with real-time and accurate load information of each lifting point, realizing the transformation of the lifting process from "blind lifting" to "visual perception".

[0035] 3. In one embodiment of the present invention, the adjustment mechanism includes a connecting groove 4, which is provided in multiple ways on the inner side wall of the adjusting slide rod 21. A telescopic cylinder 41 is also installed in the connecting groove 4. The output end of the telescopic cylinder 41 is fixedly connected to a telescopic push rod 43. The front end of the telescopic push rod 43 is arc-shaped and has protruding plates on both sides for limiting and pushing the hoisting rope 27.

[0036] During operation, the operator first activates the telescopic cylinder 41 at a specific position under the instruction of the control system, pushing the telescopic push rod 43 at its front end to extend outward. Through the arc-shaped front end and the raised plate structure on both sides, the telescopic push rod 43 can accurately and stably contact and push the corresponding lifting rope 27, changing the effective length of the rope at that lifting point, thereby finely adjusting the height of the goods below and achieving local fine adjustment of the goods' posture.

[0037] 4. In one embodiment of the present invention, a wireless transmission head 42 is inserted at the rear end of the telescopic cylinder 41 for controlling the operation of the telescopic cylinder 41, and the wireless transmission head 42 is also wirelessly connected to a wireless transmission head 44.

[0038] During operation, the staff first issues instructions through the central control system, and the instruction signals are received through wireless transmission head 42. Through the wireless data link established between wireless transmission head 42 and wireless transmission head 44, the uploading of tension sensing data and the issuance of pneumatic execution instructions are realized, forming a complete wireless monitoring and closed-loop control system. This avoids cumbersome wired connections and improves the system's response speed and layout flexibility.

[0039] Wireless Transmitter 2 44: As a monitoring terminal, its core function is data acquisition. It has a built-in analog-to-digital converter module, which is electrically connected to the tension sensor 45 to acquire the analog voltage signal detected by the sensor in real time and convert it into digital load data. Subsequently, it packages and sends out the data through its built-in wireless transmission module such as Wi-Fi or Zigbee.

[0040] Wireless Transmission Head 1 42: As a control terminal, its core function is to receive commands and drive the actuator. It is inserted into the solenoid valve control interface of the telescopic cylinder 41. Internally, it integrates a wireless receiving module, a microprocessor (MCU), and a drive circuit. It is responsible for receiving command signals from the central control system or directly from Wireless Transmission Head 2 44. After being parsed by the MCU, the drive circuit outputs control current to open or close the solenoid valve of the telescopic cylinder 41, thereby controlling the extension and retraction of the cylinder.

[0041] Telescopic cylinder 41: As the execution terminal, it is the final action execution mechanism. It receives the control signal sent by the wireless transmission head 42, and drives the telescopic push rod 43 to move by extending or retracting the cylinder shaft, physically pushing or releasing the hoisting rope 27, directly changing the height of the hoisting point;

[0042] The tension sensors 45 on all lifting rings 28 continuously measure their force values ​​F1, F2, F3...Fn.

[0043] Working principle: When this device is needed, firstly, drive motor 23 drives the connecting shaft 24 to rotate, allowing the connecting shaft 24 to adjust the height of multiple sets of lifting ropes 27. Then, the lifting ring 28 is placed on the object to be lifted. Then, drive motor 23 drives the connecting shaft 24 to rotate in the opposite direction, allowing the connecting shaft 24 to lift the object through the lifting ring 28. During lifting, if the object is heavier or has a different shape, it may become heavier. At this time, the tension sensor 45 detects the weight of the lifted item and detects the heavier telescopic push rod 43. Then, the telescopic push rod 43 transmits the data to the wireless transmitter 42 through the wireless transmitter 44. Then, the wireless transmitter 42 controls the telescopic cylinder 41 at the lighter end to work, allowing the telescopic cylinder 41 to extend and retract the telescopic push rod 43 to push the lifting rope 27, causing the lighter end of the lifting rope 27 to rise, thus compensating for the heavier end.

[0044] Each wireless transmitter 44 transmits its corresponding force data wirelessly to a central controller in real time. After receiving the data from all lifting points, the central controller quickly determines whether the cargo is in a balanced state. If it finds that the force on one or more lifting points is significantly less than that on other lifting points, it is determined that this side is "lighter" and there is an off-center load. The central controller generates a control command, specifies the lifting point position that needs to be adjusted, i.e., the corresponding telescopic cylinder, and commands it to retract. The wireless transmitter 42 at the target position receives the wireless command from the controller, and its internal MCU drive circuit is turned on, supplying power to the solenoid valve on the retracting side of the telescopic cylinder 41.

[0045] The main control chip uses STMicroelectronics' STM32F407 series. Its workflow is entirely based on standard processes of existing automation technology. The controller continuously receives data packets from all wireless transmitters via its connected wireless gateway. Its built-in program (logic) parses these data packets according to a predetermined communication protocol (such as Modbus RTU over RF or a custom lightweight protocol), extracting the real-time load value of each lifting point. The controller then sends the parsed data to its internal control algorithm for calculation. This algorithm is typically a simple comparison logic: calculating the average load of all valid lifting points and setting an allowable deviation threshold (such as ±10% of the average). If the load value of any lifting point is consistently lower than (average load - threshold), it is determined to be a "light load point" and requires compensation.

[0046] Once an adjustment is determined to be necessary, the controller immediately generates a control command. This command contains the address of the target actuator (a wireless transmitter with a specific serial number, 42) and the action to be performed (e.g., "cylinder retraction"). This command is transmitted through the wireless gateway, following the same wireless communication protocol.

[0047] The recommended STM32 is a commercially available general-purpose industrial control product. Its datasheet, programming methods and application examples are well-known to those skilled in the art and are not original to this patent.

[0048] Example 2: This example is basically the same as the previous example, except that an adjustment component is added to drive the device to move. The adjustment component includes a support base plate 3, which is fixedly connected to the bottom end of the adjustment slide rod 21. A second drive motor 31 is installed on the top of the support base plate 3. A connecting gear 32 is fixedly connected to the output end of the second drive motor 31. A connecting tooth groove 22 is also provided on the bottom end of the connecting slide sleeve 12 near the connecting slide groove 2 for meshing with the connecting gear 32.

[0049] During operation, the staff first start the drive motor 31 according to the specific lateral position of the goods to be hoisted. The drive motor 31 drives the connecting gear 32 to rotate. The meshing of the gear with the connecting tooth groove 22 fixed on the connecting sleeve 12 generates driving force, thereby driving the entire adjusting slide rod 21 smoothly and accurately.

[0050] Working principle: When this device is needed, the drive motor 31 is controlled to work according to the position of the item to be hoisted. The drive motor 31 will drive the connecting gear 32 to mesh with the connecting tooth groove 22, and the connecting gear 32 will drive the adjusting slide rod 21 to realize the overall position adjustment of the device for easy hoisting.

[0051] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-lifting-point gantry spreader, characterized by: It includes two connecting pulleys (1), and two support rods (11) are fixedly connected to the top of the two connecting pulleys (1). Two connecting sleeves (12) are also fixedly connected to the top of the two support rods (11) for adjusting the overall position of the device. Two connecting grooves (2) are provided on the side of the two connecting sleeves (12) that are close to each other, and an adjusting rod (21) is slidably connected between the two connecting grooves (2); the outer side wall of the adjusting rod (21) and the inner side wall of the connecting sleeve (12) are provided with adjusting components for driving the adjusting rod (21) to move. The top of the adjusting slide rod (21) is provided with a multi-point hoisting mechanism for hoisting materials; the inner side wall of the adjusting slide rod (21) is provided with an adjusting mechanism for adjusting the force.

2. A multi-lifting point spreader according to claim 1, characterized in that: The hoisting mechanism includes a drive motor (23), which is mounted on the top of the adjusting slide rod (21) in two configurations. The output end of the drive motor (23) is fixedly connected to a connecting shaft (24). Multiple partition plates (25) are fixedly connected to the outside of the connecting shaft (24) for separation. Multiple sets of hoisting ropes (27) are provided on the outside of the connecting shaft (24) for hoisting. Each partition plate (25) is fixedly connected to a support frame (26) for supporting the connecting shaft (24).

3. A multi-point gantry crane according to claim 2, characterized in that: The bottom end of the lifting rope (27) is fixedly connected to a lifting ring (28) for lifting goods. A tension sensor (45) is also installed on the inner side of the lifting ring (28) for detecting gravity. A wireless transmission head (44) is installed on the outer side wall of the lifting ring (28) for wirelessly transmitting gravity data.

4. A multi-point gantry crane according to claim 1, characterized in that: The adjustment mechanism includes a connecting groove (4), which is provided in multiple ways on the inner side wall of the adjusting slide rod (21). A telescopic cylinder (41) is also installed in the connecting groove (4). A telescopic push rod (43) is fixedly connected to the output end of the telescopic cylinder (41). The front end of the telescopic push rod (43) is arc-shaped and has protruding plates on both sides for limiting and pushing the hoisting rope (27).

5. A multi-point gantry crane according to claim 4, characterized in that: The telescopic cylinder (41) is equipped with a wireless transmission head one (42) at its rear end for controlling the operation of the telescopic cylinder (41). The wireless transmission head one (42) is also wirelessly connected to a wireless transmission head two (44).

6. A multi-point gantry crane according to claim 1, characterized in that: The adjustment assembly includes a support base plate (3), which is fixedly connected to the bottom end of the adjustment slide rod (21). A second drive motor (31) is installed on the top of the support base plate (3). A connecting gear (32) is fixedly connected to the output end of the second drive motor (31). A connecting tooth groove (22) is also provided on the bottom end of the connecting slide sleeve (12) near the connecting slide groove (2) for meshing with the connecting gear (32).

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