Rail-mounted light-weight gantry crane
By adopting a tensile-compressive lightweight structure and a trolley weight-reducing mechanism on the rail-mounted gantry crane, the problem of the heavy beam was solved, costs and energy consumption were reduced, and the operating accuracy and reliability of the equipment were improved.
Patent Information
- Application Number
- CN202511059187.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-09-05
AI Technical Summary
The existing rail-mounted gantry crane beam is designed to be thick and bulky, resulting in high manufacturing costs, high energy consumption and high maintenance costs.
It adopts a tensile and compressive lightweight structure and a trolley weight reduction mechanism. The middle rigidity of the beam is enhanced through the middle column, pull rod and connecting seat, which disperses the weight of the self-propelled trolley and the hoisted container, reduces the stress on the middle part of the beam and prevents bending.
It achieves lightweight design, reduces manufacturing costs and energy consumption, and improves the operating accuracy and reliability of the equipment.
Smart Images
Figure CN120589618A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of gantry crane equipment, in particular to a rail-type lightweight gantry crane. Background Art
[0002] With the continued expansion and deepening of international trade, container shipping, thanks to its numerous advantages, including low costs, minimal cargo damage, and high transport efficiency, has rapidly become a vital link connecting the global economy. The rise of this transportation model has not only significantly boosted the volume of international trade but also driven innovation and development in the logistics industry. For ports specializing in container shipping, to accommodate the growing cargo throughput and increasing operational efficiency, container handling machinery and yard facilities are undergoing a profound transformation from traditional to automated, high-speed, and large-scale.
[0003] The application of automation technology is particularly critical in this transformation process. It not only improves the safety and reliability of port operations but also significantly enhances overall operational efficiency. High-speed loading and unloading systems, such as automated quay cranes and automated guided vehicles (AGVs), significantly shorten vessel stays in port and accelerate cargo turnover through precise scheduling and efficient collaborative operations, further enhancing port competitiveness. Furthermore, the powerful handling capabilities of large-scale loading and unloading machinery, such as post-Panamax quay cranes, enable ports to handle larger container vessels, meeting the growing demand for cargo transportation.
[0004] However, as container handling equipment evolved, rail-mounted gantry cranes, crucial equipment in container yards, gradually began to experience design limitations. To meet beam stiffness requirements and ensure stability and safety during operation, gantry crane girders were often designed to be thick and heavy. While this design improved the equipment's load-bearing capacity to a certain extent, it also introduced a series of problems.
[0005] First, the manufacturing cost of the equipment has increased significantly. Due to the large girder, high material consumption, and complex manufacturing process, the overall manufacturing cost of gantry cranes remains high. Second, operating energy consumption is high. The thick girder not only increases the weight of the equipment itself but also increases energy consumption during operation, which is undoubtedly a significant challenge for modern ports pursuing green and low-carbon development. Third, maintenance costs are high. The equipment's complex structure and susceptibility to environmental factors such as wind, sun, and corrosion during use increase both the difficulty and cost of maintenance. Summary of the Invention
[0006] The purpose of the present invention is to provide a rail-mounted lightweight gantry crane to address the deficiencies of the above-mentioned prior art and achieve the purpose of lightweighting.
[0007] The present invention provides a rail-type lightweight gantry crane, comprising a gantry, a traveling mechanism, a self-propelled trolley and a sling, wherein the gantry comprises a main beam and support legs, support legs are respectively installed at both ends of the main beam, the lower ends of the two legs are respectively fixedly connected to the traveling mechanism, a self-propelled trolley is installed on the main beam, an electric drum is installed on the self-propelled trolley, and the electric drum is connected to the sling through a first steel wire rope; it is characterized in that: a tension and compression lightweight structure is installed on the gantry, the tension and compression lightweight structure comprises an intermediate column, a pull rod and a first connecting seat, intermediate columns are respectively vertically fixedly installed at the middle positions of the two main beams, and the upper ends of the two intermediate columns are connected through a connecting rod; first connecting seats are respectively installed at both ends of the main beam, one end of the first pull rod is connected to the first connecting seat, and the other end is connected to the upper end of the intermediate column; the gantry is connected to the self-propelled trolley through a trolley weight reduction mechanism.
[0008] Furthermore, one end of the first pull rod is hinged to the first connecting seat via a pin, and the other end is hinged to the upper end of the middle column via a pin.
[0009] Furthermore, an ear plate is installed at the inner end of the side column, and a second connecting seat is installed on the beam. The ear plate of the side column and the second connecting seat are connected through a second pull rod, one end of the second pull rod is hinged to the ear plate, and the other end is hinged to the second connecting seat.
[0010] Furthermore, the trolley weight reduction mechanism includes a side column, a first guide wheel, a second guide wheel, a third guide wheel and a fourth guide wheel. The side columns are vertically installed at both ends of the beam, the upper end of the side column is rotatably connected to the first guide wheel through an axis, and the lower end of the side column is provided with a cavity with openings on both sides, and the lower cavity of the side column is rotatably connected to the second guide wheel through an axis; the two ends of the beam are respectively provided with a placement groove, in which the third guide wheel and the fourth guide wheel are installed, and the fourth guide wheel is rotatably connected to the inner wall of the placement groove through an axis; one end of the second steel wire rope is connected to the self-propelled trolley, and the other end successively passes around the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel at one end of the main beam, and then passes around the fourth guide wheel, the third guide wheel, the second guide wheel and the first guide wheel at the other end of the main beam and is connected to the self-propelled trolley.
[0011] Furthermore, a sliding frame is installed in the beam placement groove, and the sliding frame is connected to the third guide wheel through an axis rotation. The third guide wheel is located above the fourth guide wheel, and symmetrically distributed sliding grooves are provided on both side walls of the placement groove. The two side plates of the sliding frame are respectively placed in the sliding grooves, and the two slide together. A spring is installed in the sliding groove, and the outer end of the spring is connected to the outer end wall of the sliding groove, and the inner end of the spring is pressed against the outer end wall of the sliding frame.
[0012] Furthermore, a hydraulic cylinder is fixedly installed in the placement groove, and the hydraulic cylinder is placed at the outer end of the sliding frame. The inner rod of the hydraulic cylinder faces the outer end of the sliding frame, and correspondingly, the inner rod of the hydraulic cylinder is fixedly connected to the top plate.
[0013] Furthermore, lifting rings are respectively installed on both sides of the self-propelled trolley, and a connecting hole is provided on the main beam, which connects the placement grooves at both ends of the main beam.
[0014] Furthermore, one end of the second steel wire rope is connected to the lifting ring, and the other end is connected to the lifting ring on the self-propelled trolley.
[0015] Compared with the prior art, the present invention has the following outstanding beneficial effects: 1. The main beam of the gantry of the present invention is equipped with a lightweight tension and compression structure, which includes an intermediate column, a tension rod and a first connecting seat. The middle position of the main beam is connected to the two ends of the beam through the intermediate column and the connecting rod, thereby enhancing the rigidity of the middle position of the beam without widening or thickening the beam; 2. The gantry of the present invention is equipped with a trolley weight reduction mechanism, which can distribute the weight of the self-propelled trolley and the hoisted container to both ends of the beam, reducing the stress on the middle part of the beam and preventing it from bending due to stress, which affects the accuracy of automated operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a front view of the present invention; Figure 3 is a top view of the present invention; Figure 4 It is a cross-sectional view of the AA portion of the present invention; Figure 5 yes Figure 4 A partial enlarged view of part B; Among them, 1. Gantry; 11. Support legs; 12. Main beam; 2. Walking mechanism; 3. Self-propelled trolley; 4. Electric reel; 5. Tension and compression lightweight structure; 51. Middle column; 52. First pull rod; 53. First connecting seat; 6. Trolley weight reduction mechanism; 61. Side column; 62. Second pull rod; 63. Second connecting seat; 64. First guide wheel; 65. Second guide wheel; 66. Third guide wheel; 67. Fourth guide wheel; 68. Second steel wire rope; 69. Hydraulic cylinder; 610. Sliding frame; 611. Spring. DETAILED DESCRIPTION
[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0018] like Figures 1-3As shown, the present invention includes a gantry 1, a traveling mechanism 2, a self-propelled trolley 3, a sling, a tension-compression lightweight structure 5 and a trolley weight reduction mechanism 6.
[0019] The gantry 1 includes a main beam 12 and support legs 11. The support legs 11 are fixedly installed at both ends of the main beam 12. The lower ends of the two support legs 11 are fixedly connected to the walking mechanism 2. A self-propelled trolley 3 is installed on the main beam 12. The main beam 12 provides a track for the operation of the self-propelled trolley 3. An electric drum 4 is installed on the self-propelled trolley 3, and the electric drum 4 is connected to the sling through a first steel wire rope.
[0020] The above structure is a common structure of a gantry crane, and its specific connection relationship will not be repeated here.
[0021] The gantry 1 is equipped with a tensile and compressive lightweight structure 5, which includes an intermediate column 51, a pull rod and a first connecting seat 53. The intermediate columns 51 are respectively fixed vertically in the middle positions of the two main beams 12, and the upper ends of the two intermediate columns 51 are connected by a connecting rod.
[0022] The first connecting seats 53 are fixedly installed at both ends of the main beam 12. One end of the first pull rod 52 is hinged to the first connecting seat 53 through a pin, and the other end is hinged to the upper end of the middle column 51 through a pin.
[0023] like Figure 4 and 5 As shown, the gantry 1 is provided with a trolley weight reduction mechanism 6, which includes a side column 61, a first guide wheel 64, a second guide wheel 65, a third guide wheel 66 and a fourth guide wheel 67. The two ends of the beam are respectively and vertically fixed with side columns 61, the upper end of the side column 61 is rotatably connected to the first guide wheel 64 through an axis, and the lower end of the side column 61 is provided with a cavity with openings on both sides, and the lower cavity of the side column 61 is rotatably connected to the second guide wheel 65 through an axis.
[0024] In the optimized solution, an ear plate is fixedly installed on the inner end of the side column 61, and a second connecting seat 63 is fixedly installed on the beam. The ear plate of the side column 61 and the second connecting seat 63 are connected through a second pull rod 62. One end of the second pull rod 62 is hinged to the ear plate, and the other end is hinged to the second connecting seat 63.
[0025] The two ends of the beam are respectively provided with placement grooves, and the third guide wheel 66 and the fourth guide wheel 67 are installed in the placement grooves. The fourth guide wheel 67 is rotatably connected to the inner wall of the placement groove through an axis, and a sliding frame 610 is installed in the placement groove. The sliding frame 610 is rotatably connected to the third guide wheel 66 through an axis. The third guide wheel 66 is located above the fourth guide wheel 67. The two side walls of the placement groove are respectively provided with symmetrically distributed sliding grooves, and the two side plates of the sliding frame 610 are respectively placed in the sliding grooves, and the two slide together. A spring 611 is installed in the sliding groove, and the outer end of the spring 611 is connected to the outer end wall of the sliding groove, and the inner end of the spring 611 is pressed against the outer end wall of the sliding frame 610.
[0026] In the optimized solution, a hydraulic cylinder 69 is fixedly installed in the placement groove, and the hydraulic cylinder 69 is placed at the outer end of the sliding frame 610. The inner rod of the hydraulic cylinder 69 faces the outer end of the sliding frame 610, and correspondingly, the inner rod of the hydraulic cylinder 69 is fixedly connected to the top plate.
[0027] The two sides of the self-propelled trolley 3 are respectively fixedly installed with lifting rings, and a connecting hole is provided on the main beam 12, which connects the placement grooves at both ends of the main beam 12. One end of the second steel wire rope 68 is fixedly connected to the lifting ring, and the other end passes through the first guide wheel 64, the second guide wheel 65, the third guide wheel 66 and the fourth guide wheel 67 at one end of the main beam 12 in sequence, passes through the connecting hole on the main beam 12, and passes through the fourth guide wheel 67, the third guide wheel 66, the second guide wheel 65 and the first guide wheel 64 at the other end of the main beam 12 in sequence and is fixedly connected to the lifting ring on the self-propelled trolley 3.
[0028] The operation process is as follows: when the self-propelled trolley 3 moves on the main beam 12, it drives the second steel wire rope 68 to move around the guide wheel, and the third guide wheel 66 can pre-tighten the second steel wire rope 68. When the self-propelled trolley 3 is in motion, the second steel wire rope 68 is always kept in a pre-tightened state, which exerts a certain upward pulling force on the self-propelled trolley 3, thereby reducing the pressure of the self-propelled trolley 3 on the main beam 12; when the self-propelled trolley 3 lifts the container through the electric reel 4 and the sling, the hydraulic cylinder 69 is started, so that the inner rod of the hydraulic cylinder 69 drives the sliding frame 610 to move toward the inner end, so that the two third guide wheels 66 tighten the second steel wire rope 68, so that the second steel wire rope 68 generates an upward pulling force on the self-propelled trolley 3, thereby reducing the pressure of the self-propelled trolley 3 and the container on the main beam 12.
[0029] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to it without departing from the spirit and scope of the present invention are within the scope of protection of the present invention.
Claims
1. A rail-type lightweight gantry crane, comprising a gantry (1), a traveling mechanism (2), a self-propelled trolley (3) and a sling, wherein the gantry (1) comprises a main beam (12) and support legs (11), the two ends of the main beam (12) are respectively mounted with support legs (11), the lower ends of the two support legs (11) are respectively fixedly connected to the traveling mechanism (2), the main beam (12) is mounted with a self-propelled trolley (3), the self-propelled trolley (3) is mounted with an electric drum (4), and the electric drum (4) is connected to the sling via a first steel wire rope; the characteristics are as follows: The gantry (1) is provided with a tension-compression lightweight structure (5), which includes an intermediate column (51), a pull rod and a first connecting seat (53). The intermediate columns (51) are respectively fixedly installed vertically at the intermediate positions of the two main beams (12), and the upper ends of the two intermediate columns (51) are connected by a connecting rod; the first connecting seats (53) are respectively installed at the two ends of the main beam (12), one end of the first pull rod (52) is connected to the first connecting seat (53), and the other end is connected to the upper end of the intermediate column (51); the gantry (1) is connected to the self-propelled trolley (3) through the trolley weight reduction mechanism (6).
2. The rail-mounted lightweight gantry crane according to claim 1, characterized in that: One end of the first pull rod (52) is hinged to the first connecting seat (53) via a pin, and the other end is hinged to the upper end of the middle column (51) via a pin.
3. The rail-mounted lightweight gantry crane according to claim 1, characterized in that: An ear plate is installed at the inner end of the side column (61), and a second connecting seat (63) is installed on the beam. The ear plate of the side column (61) and the second connecting seat (63) are connected through a second pull rod (62), and one end of the second pull rod (62) is hinged to the ear plate, and the other end is hinged to the second connecting seat (63).
4. The rail-mounted lightweight gantry crane according to claim 1, characterized in that: The trolley weight reduction mechanism (6) includes a side column (61), a first guide wheel (64), a second guide wheel (65), a third guide wheel (66) and a fourth guide wheel (67). The two ends of the beam are respectively vertically mounted with a side column (61). The upper end of the side column (61) is rotatably connected to the first guide wheel (64) through an axis. The lower end of the side column (61) is provided with a cavity with two openings on both sides. The lower cavity of the side column (61) is rotatably connected to the second guide wheel (65) through an axis. The two ends of the beam are respectively provided with a placement groove, and the placement groove is installed with the third guide wheel (66). The third guide wheel (66) and the fourth guide wheel (67) are rotatably connected to the inner wall of the placement groove through an axis; one end of the second steel wire rope (68) is connected to the self-propelled trolley (3), and the other end of the second steel wire rope is passed through the first guide wheel (64), the second guide wheel (65), the third guide wheel (66) and the fourth guide wheel (67) at one end of the main beam (12) in sequence, and then passed through the fourth guide wheel (67), the third guide wheel (66), the second guide wheel (65) and the first guide wheel (64) at the other end of the main beam (12) in sequence to be connected to the self-propelled trolley (3).
5. The rail-mounted lightweight gantry crane according to claim 4, characterized in that: A sliding frame (610) is installed in the beam placement groove. The sliding frame (610) is connected to the third guide wheel (66) through an axis rotation. The third guide wheel (66) is located above the fourth guide wheel (67). Symmetrically distributed sliding grooves are provided on both side walls of the placement groove. The two side plates of the sliding frame (610) are placed in the sliding grooves respectively. The two side plates slide together. A spring (611) is installed in the sliding groove. The outer end of the spring (611) is connected to the outer end wall of the sliding groove, and the inner end of the spring (611) is pressed against the outer end wall of the sliding frame (610).
6. The rail-mounted lightweight gantry crane according to claim 5, characterized in that: A hydraulic cylinder (69) is installed in the placement groove. The hydraulic cylinder (69) is placed on the outer end of the sliding frame (610). The inner rod of the hydraulic cylinder (69) faces the outer end of the sliding frame (610). Correspondingly, the inner rod of the hydraulic cylinder (69) is connected to the top plate.
7. The rail-mounted lightweight gantry crane according to claim 6, characterized in that: Both sides of the self-propelled trolley (3) are respectively fixedly mounted with lifting rings, and a connecting hole is provided on the main beam (12), and the connecting hole connects the placement grooves at both ends of the main beam (12).
8. The rail-mounted lightweight gantry crane according to claim 7, characterized in that: One end of the second steel wire rope (68) is connected to the lifting ring, and the other end is connected to the lifting ring on the self-propelled trolley (3).