A new type of port portal crane

Abstract

This utility model discloses a novel port gantry crane, comprising an upper actuator and a lower traveling and rotating mechanism. The lower traveling and rotating mechanism is located below the upper actuator. The upper actuator is used for the crane's vertical lifting and horizontal displacement, while the lower traveling and rotating mechanism is used for the crane's travel and rotation. This utility model features a simplified structure and reduced cost. It eliminates complex components such as wire ropes, drums, and racks, employing a rigid boom and hydraulic cylinder drive, resulting in a simpler structure. Reduced material usage lowers the overall weight and manufacturing costs. Furthermore, the hydraulic cylinders require less maintenance than wire ropes and racks, reducing maintenance costs. The rigid boom eliminates the problem of flexible swaying, improving material handling and alignment accuracy, and increasing lifting and luffing speeds, significantly improving operational efficiency. Moreover, it can adapt to various materials such as containers and bulk cargo without changing the lifting gear, further reducing operational downtime.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically a new type of port gantry crane. Background Technology

[0002] In material handling operations at port terminals, gantry cranes are one of the core pieces of equipment. Existing mature gantry cranes are mainly divided into two categories: single-arm gantry cranes and four-bar linkage gantry cranes. Both types of cranes use wire rope hoisting mechanisms. The single-arm type achieves luffing via wire rope, while the four-bar linkage type achieves luffing via rack and pinion extension. However, both types have the following significant drawbacks:

[0003] The hoisting mechanism consists of multiple components such as a motor, reducer, drum, brake, and wire rope. The luffing mechanism also relies on wire rope or rack, resulting in a complex overall structure and high manufacturing costs. Furthermore, wire ropes are prone to wear, and racks are prone to jamming, leading to frequent and costly maintenance. The wire rope, being a flexible structure, is susceptible to swaying during material handling and alignment. The hoisting and luffing speeds are limited by the stability of this flexible structure, resulting in low alignment accuracy and low operational efficiency. Existing ports are mostly multi-material ports, requiring the loading and unloading of containers and bulk cargo. However, existing gantry cranes require changing different spreaders to adapt to different materials, resulting in complex spreader mechanisms and time-consuming and labor-intensive replacement processes, further reducing operational efficiency. Therefore, we offer a new type of port gantry crane. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of port gantry crane to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel port gantry crane, comprising an upper actuator and a lower traveling and rotating mechanism, wherein the lower traveling and rotating mechanism is disposed below the upper actuator, the upper actuator is used for the crane's vertical lifting and horizontal displacement movement, and the lower traveling and rotating mechanism is used for the crane's traveling and rotating movement.

[0006] Preferably, the upper actuator includes a turntable, a machine room, a driver's cab, a main articulated seat, a main boom, a tie rod, a connecting rod, a counterweight, a secondary boom, a main cylinder, and a secondary cylinder. The machine room is installed on the turntable and has an electro-hydraulic drive mechanism inside. The driver's cab is installed on the turntable.

[0007] Preferably, the main hinge seat is fixed on the turntable, the end of the main boom near the main hinge seat is hinged to the main hinge seat, the right end of the pull rod is hinged to the main boom via a connecting rod, the left end of the pull rod is hinged to the auxiliary boom, and the end of the main boom near the auxiliary boom is hinged to the auxiliary boom.

[0008] Preferably, the counterweight is fixed to the connecting rod on the side away from the secondary boom, one end of the main hydraulic cylinder is hinged to the turntable, and the other end of the main hydraulic cylinder is hinged to the middle of the main boom. The main hydraulic cylinder is used to drive the angle adjustment of the main boom. One end of the secondary hydraulic cylinder is hinged to the middle of the main boom, and the other end of the secondary hydraulic cylinder is hinged to the middle of the connecting rod. The secondary hydraulic cylinder is used to drive the angle adjustment of the connecting rod.

[0009] Preferably, the lower traveling and rotating mechanism includes a lower main beam, an end beam, two running mechanisms, a cable reel, a cylinder, a slewing support, and a ladder platform. The cylinder is fixed to the top of the lower main beam, and the slewing support is located on the top of the cylinder and fixedly connected to the bottom of the turntable. The slewing support enables the upper actuator to rotate 360°.

[0010] Preferably, there are two end beams, which are respectively fixed to both ends of the lower main beam. The running mechanism is installed at the bottom of the end beam and is used to drive the crane to move as a whole. The cable reel is fixed to the side of the lower main beam and is used to supply power to the crane. The ladder platform is fixed to the side of the cylinder.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model features a simplified structure and reduced costs. It eliminates complex components such as wire ropes, drums, and racks, employing a rigid boom and hydraulic cylinder drive, resulting in a simpler structure. Reduced material usage lowers the overall weight and manufacturing costs. Furthermore, the hydraulic cylinders require less maintenance than wire ropes and racks, further reducing maintenance costs. The rigid boom eliminates the problem of flexible swaying, improving material handling and alignment accuracy, and increasing lifting and luffing speeds, significantly enhancing operational efficiency. It can adapt to various materials such as containers and bulk cargo without requiring changes to the lifting gear, further reducing downtime. The CNC hydraulic drive system can achieve preset trajectory operation, and with the assistance of vision and positioning systems, unmanned operation can be achieved, reducing reliance on operator skills. Even in the event of complete hydraulic failure, the counterweight can achieve self-balancing, preventing the risk of tipping over. Attached Figure Description

[0013] Figure 1 This is a structural cross-sectional view of the front view of this utility model;

[0014] Figure 2 This is a structural cross-sectional view of the upper actuator of this utility model (front view).

[0015] Figure 3 This is a structural cross-sectional view of the lower traveling and rotating mechanism of this utility model, taken from the front view.

[0016] In the diagram: 1. Upper actuator; 11. Turntable; 12. Machine room; 13. Driver's cab; 14. Main articulated seat; 15. Main boom; 16. Tie rod; 17. Connecting rod; 18. Counterweight; 19. Sub-boom; 110. Main cylinder; 111. Sub-cylinder; 2. Lower traveling and rotating mechanism; 21. Lower main beam; 22. End beam; 23. Traveling mechanism; 24. Cable reel; 25. Cylinder; 26. Slewing bearing; 27. Ladder platform. 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] Please see Figure 1-3A novel port gantry crane includes an upper actuator 1 and a lower traveling and rotating mechanism 2. The upper actuator 1 is used for the crane's vertical lifting and horizontal displacement. The upper actuator 1 includes a turntable 11, a machine room 12, a driver's cab 13, a main articulation seat 14, a main boom 15, a tie rod 16, a connecting rod 17, a counterweight 18, a secondary boom 19, a main hydraulic cylinder 110, and a secondary hydraulic cylinder 111. The turntable 11 serves as the mounting base for the upper actuator 1, supporting all upper components such as the machine room 12, driver's cab 13, and main articulation seat 14, providing an integrated installation platform for each structure. The machine room 12 is mounted on the turntable 11 and contains an electro-hydraulic drive mechanism. The integrated electro-hydraulic drive mechanism within the machine room 12 provides the entire... The upper actuator 1 provides the power source for its movement. The driver's cab 13 is mounted on the turntable 11, providing the operator with a workspace. Inside, there is a control panel linked to the CNC hydraulic drive system, serving as the core node for human-machine interaction. The main hinge seat 14 is fixed to the turntable 11. The end of the main boom 15 closest to the main hinge seat 14 is hinged to it. The main hinge seat 14 provides a rotatable support point for the main boom 15 and is the rotation axis for adjusting its angle. The main boom 15 is a rigid load-bearing and transmission component, receiving the driving force of the main cylinder 110 and causing the four-bar linkage to deform. The right end of the tie rod 16 is hinged to the main boom 15 via a connecting rod 17. One end of the connecting rod 17 is hinged to the main boom 15, and the other end is connected to the tie rod 16. Simultaneously bearing the driving force of the counterweight 18 and the auxiliary cylinder 111, the four-bar linkage acts as the force transmission intermediary and counterweight mounting carrier. The left end of the tie rod 16 is hinged to the auxiliary boom 19. The tie rod 16, connecting rod 17, main boom 15, and auxiliary boom 19 together form a four-bar linkage, constraining the movement trajectory of the auxiliary boom 19. The end of the main boom 15 closest to the auxiliary boom 19 is hinged to the auxiliary boom 19. The counterweight 18 is fixed to the connecting rod 17 and the side away from the auxiliary boom 19. The counterweight 18 balances the weight of the upper actuator 1, preventing the mechanism from tilting due to load imbalance. During normal operation, it balances the load, reduces cylinder driving force loss, and lowers energy consumption. It achieves self-balancing of the crane through its own weight, preventing the upper mechanism from overturning. The auxiliary boom 19 serves as the actuator carrier for material grabbing. The main boom 110 can be connected to a universal lifting device. Lifting and translating are achieved through the deformation of a four-bar linkage, directly driving material loading and unloading. One end of the main hydraulic cylinder 110 is hinged to the turntable 11, and the other end is hinged to the middle of the main boom 15. The main hydraulic cylinder 110 is used to drive the angle adjustment of the main boom 15. The hydraulic drive offers fast response and stable power, making it more reliable than traditional rack and pinion drives and wire rope drives, reducing the frequency of failures. Working in conjunction with the auxiliary hydraulic cylinder 111, it achieves precise deformation of the four-bar linkage, avoiding errors from manual operation and reducing operational difficulty. One end of the auxiliary hydraulic cylinder 111 is hinged to the middle of the main boom 15, and the other end is hinged to the middle of the connecting rod 17. The auxiliary hydraulic cylinder 111 is used to drive the angle adjustment of the connecting rod 17. The auxiliary hydraulic cylinder 111 works in coordination with the main hydraulic cylinder 110.Precise control of the four-bar linkage deformation enables the sub-boom 19 to move along a preset trajectory without manual fine-tuning. The hydraulic drive exhibits no mechanical wear, resulting in low maintenance costs and a long service life. The electro-hydraulic drive mechanism within the machine room 12 is electrically connected to an external CNC hydraulic drive system, controlling the combined operation of the main cylinder 110 and the auxiliary cylinder 111 to achieve horizontal translation or vertical lifting of the crane. The CNC hydraulic drive system can preset the horizontal translation trajectory and vertical lifting parameters, eliminating the need for manual operation of individual cylinders and reducing reliance on operator skill levels. The operator's cab 13 contains a control panel electrically connected to the CNC hydraulic drive system, used to select the crane's operating mode or adjust operating parameters. The main boom 15, tie rod 16, connecting rod 17, and sub-boom 19 together constitute a four-bar linkage. The main cylinder 110 and auxiliary cylinder 111 drive the deformation of the four-bar linkage, thereby lifting and translating the end of the sub-boom 19 away from the main hinge seat 14.

[0019] The lower traveling and rotating mechanism 2 is located below the upper actuator 1. The lower traveling and rotating mechanism 2 is used for the crane's travel and rotation. The lower traveling and rotating mechanism 2 includes a lower main beam 21, end beams 22, two traveling mechanisms 23, a cable reel 24, a cylinder 25, a slewing support 26, and a ladder platform 27. The lower main beam 21 serves as the load-bearing main beam of the lower mechanism, bearing the entire weight of the upper actuator 1 and components such as the lower end beams 22 and traveling mechanisms 23. It is the core of the entire machine's weight support. The cylinder 25 is fixed to the top of the lower main beam 21. The slewing support 26 is located on the top of the cylinder 25 and is fixedly connected to the bottom of the turntable 11. The slewing support 26 enables the upper actuator 1 to rotate 360°. The slewing support 26 achieves 360° rotation of the upper actuator 1 through rolling friction. The end beam 22... Two components are fixed to the two ends of the lower main beam 21. The end beam 22 provides installation support and travel guidance for the running mechanism 23. The running mechanism 23 is installed at the bottom of the end beam 22 and is used to drive the crane to move as a whole. The cable reel 24 is fixed to the side of the lower main beam 21 and is used to supply power to the crane. The cable reel 24 synchronously winds up and unwinds the cable as the crane moves, providing continuous power to the whole machine. The ladder platform 27 is fixed to the side of the cylinder 25 and provides a passage for workers to go up and down the equipment and a standing platform for maintenance. The running mechanism 23 includes a travel motor, a reducer and wheels. The travel motor drives the wheels to rotate through the reducer, and the wheels are compatible with the dock rail. The travel motor drives the wheels to roll along the dock rail through the speed adjustment of the reducer, so as to realize the overall movement of the crane.

[0020] In use, the main hydraulic cylinder 110 and the auxiliary hydraulic cylinder 111 are started to drive the main boom 15 and the connecting rod 17 to move at an angle. According to the linkage mechanism principle, this drives the lifting and horizontal displacement of the auxiliary boom 19, thus realizing the function of the crane.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new type of port portal crane, characterized in that: It includes an upper actuator (1) and a lower traveling and rotating mechanism (2). The lower traveling and rotating mechanism (2) is located below the upper actuator (1). The upper actuator (1) is used for the crane's vertical lifting and horizontal displacement movement, and the lower traveling and rotating mechanism (2) is used for the crane's traveling and rotating movement.

2. The new type of port portal crane according to claim 1, characterized in that: The upper actuator (1) includes a turntable (11), a machine room (12), a driver's cab (13), a main articulated seat (14), a main boom (15), a tie rod (16), a connecting rod (17), a counterweight (18), a secondary boom (19), a main cylinder (110), and a secondary cylinder (111). The machine room (12) is installed on the turntable (11) and is equipped with an electro-hydraulic drive mechanism inside. The driver's cab (13) is installed on the turntable (11).

3. The new type of port portal crane according to claim 2, characterized in that: The main hinge seat (14) is fixed on the turntable (11). The main boom (15) is hinged to the main hinge seat (14) at one end near the main hinge seat (14). The right end of the tie rod (16) is hinged to the main boom (15) through the connecting rod (17). The left end of the tie rod (16) is hinged to the auxiliary boom (19). The main boom (15) is hinged to the auxiliary boom (19) at one end near the auxiliary boom (19).

4. The new type of port portal crane according to claim 3, characterized in that: The counterweight (18) is fixed on the connecting rod (17) and on the side away from the secondary boom (19). One end of the main cylinder (110) is hinged to the turntable (11), and the other end of the main cylinder (110) is hinged to the middle of the main boom (15). The main cylinder (110) is used to drive the angle adjustment of the main boom (15). One end of the secondary cylinder (111) is hinged to the middle of the main boom (15), and the other end of the secondary cylinder (111) is hinged to the middle of the connecting rod (17). The secondary cylinder (111) is used to drive the angle adjustment of the connecting rod (17).

5. The new type of port portal crane according to claim 4, characterized in that: The lower walking and rotating mechanism (2) includes a lower main beam (21), an end beam (22), two running mechanisms (23), a cable reel (24), a cylinder (25), a slewing support (26), and a ladder platform (27). The cylinder (25) is fixed to the top of the lower main beam (21), and the slewing support (26) is located on the top of the cylinder (25) and fixedly connected to the bottom of the turntable (11). The slewing support (26) enables the upper actuator (1) to rotate 360°.

6. The new type of port portal crane according to claim 5, characterized in that: The number of end beams (22) is two and they are fixed at both ends of the lower main beam (21). The running mechanism (23) is installed at the bottom of the end beam (22) and is used to drive the crane to move as a whole. The cable reel (24) is fixed to the side of the lower main beam (21) and is used to supply power to the crane. The ladder platform (27) is fixed to the side of the cylinder (25).

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