A lightweight unmanned container transport vehicle

Abstract

The present invention discloses a lightweight unmanned container transport vehicle, which belongs to the technical field of logistics and transportation equipment. The lightweight unmanned container transport vehicle provided by the present invention includes a frame assembly, two axles connected to the frame assembly, a shell and two AGV brackets; the two AGV brackets are located at both ends of the frame assembly in the length direction, and the shell is arranged on the periphery of the frame assembly; high-voltage cabinets, low-voltage cabinets, battery cabinets, hydraulic hydrogen fuel cabinets and liquid cooling cabinets are arranged on both sides of the frame assembly; the upper bearing surface of the frame assembly is greater than two meters above the ground. The lightweight unmanned container transport vehicle provided by the present invention provides sufficient repair and maintenance space through the optimization of the spatial layout, meeting the needs of safe and efficient repair and maintenance.

Description

Technical Field

[0001] The present invention belongs to the technical field of logistics transportation equipment, and specifically relates to a lightweight unmanned container transport vehicle. Background Art

[0002] With the rapid development of 5G communication and unmanned driving technology, container transport vehicles at the terminal have gradually changed from manned to unmanned. Automated Guided Vehicle (AGV) has been widely used in recent years due to its advantages such as automation, flexibility and punctuality. The AGV currently used uses more new energy for energy supply and has the characteristics of lightweight. For example, the Chinese invention patent with application number 202210547351.9 discloses an unmanned container transport vehicle frame assembly and an unmanned container transport vehicle. The frame assembly includes a main beam and a battery rack support arm. The main beam includes a web and a lower wing plate connected in sequence. The battery rack support arm is fixedly connected to the web, and the battery rack support arm abuts the lower wing plate, and the angle between the normal direction of the abutment surface and the normal direction of the web is greater than zero; the main beam is made of aluminum alloy. The lightweight of the unmanned container transport vehicle frame assembly is achieved while ensuring the stability of the vehicle driving process. However, this generation of 5G intelligent unmanned container transport vehicles has a compact overall structure and basically no maintenance space inside the vehicle. When performing repair and maintenance operations, it needs to rely on other equipment to assist, such as lifting machines and trenches, and the repair and maintenance work is time-consuming and labor-intensive. When emergency repairs are required in the middle of the vehicle, personnel are required to drill into a narrow and limited space with high voltage electricity, which is prone to safety accidents. And because of its own short height, it cannot adapt to the default container release height recognized by the unmanned ship to shore (STS) model of some automated ports, which brings difficulties to the fully unmanned automated operation of the port. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a lightweight unmanned container transport vehicle with safe and sufficient repair and maintenance space.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a lightweight unmanned container transport vehicle, including a frame assembly, and two axles, a shell and two AGV brackets connected to the frame assembly; the two axles are located below the frame assembly, the two AGV brackets are located at both ends of the frame assembly in the length direction, and the shell is arranged on the periphery of the frame assembly; high-voltage cabinets, low-voltage cabinets, battery cabinets, hydraulic hydrogen fuel cabinets and liquid cooling cabinets are provided on both sides of the frame assembly; the upper bearing surface of the frame assembly is greater than two meters above the ground.

[0005] The beneficial effects of the present invention are as follows: the lightweight unmanned container transport vehicle provided by the present invention adopts a two-bridge arrangement, and at the same time the overall frame is raised, leaving sufficient repair and maintenance space at the bottom, which fully meets the needs of safe and efficient repair and maintenance; and each equipment cabinet and frame assembly are detachable, which is convenient for replacement, greatly reducing the difficulty of equipment maintenance; the loading height of the whole vehicle is designed according to the default container placement height recognized by the unmanned shore crane model, solving the matching problem of vehicle-crane joint adjustment hardware in some ports BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 A schematic diagram of the structure of a lightweight unmanned container transport vehicle according to a specific embodiment of the present invention Figure 2 It is a partial side view of a lightweight unmanned container transport vehicle according to a specific embodiment of the present invention; Figure 3 It is a partial top view of a lightweight unmanned container transport vehicle according to a specific embodiment of the present invention; Figure 4 It is a partial back view of a lightweight unmanned container transport vehicle according to a specific embodiment of the present invention; Figure 5 A partial cross-sectional view of a lightweight unmanned container transport vehicle according to a specific embodiment of the present invention; Figure 6 It is a partial structural schematic diagram of a vehicle frame assembly according to a specific embodiment of the present invention; Figure 7 A cross-sectional view of a vehicle frame assembly according to a specific embodiment of the present invention; Figure 8 It is a schematic structural diagram of a housing according to a specific embodiment of the present invention; Fig. 9 A partial exploded view of a housing according to a specific embodiment of the present invention; Fig.10 It is a structural schematic diagram of a boom support according to a specific embodiment of the present invention; Fig.11 It is a cross-sectional view of the boom support after installation according to a specific embodiment of the present invention; Fig.12 It is a structural schematic diagram of a vehicle axle and a suspension after being connected according to a specific embodiment of the present invention; Fig.13 It is a schematic diagram of the local structure of the frame assembly, the axle and the suspension after being connected according to a specific embodiment of the present invention; Description of labels: 1. Frame assembly; 11. Main frame; 12. Sub-frame; 13. Side guard cantilever; 14. Downward pressure detection mechanism; 21. Axle; 22. Suspension; 221. H-frame; 222. Elastic element; 3. Shell; 31. Frame; 32. Skin; 4. AGV bracket; 41. base; 42. bracket; 5. High-voltage cabinet; 6. Low-voltage cabinet; 7. Battery cabinet; 8. Hydraulic hydrogen fuel cabinet; 9. Liquid cooling cabinet; 10. boom bracket; 101. cantilever; 102. supporting frame. DETAILED DESCRIPTION

[0006] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0007] Please refer to Figures 1 to 5 A lightweight unmanned container transport vehicle includes a frame assembly 1, two axles 21 connected to the frame assembly 1, a shell 3 and two AGV brackets 4; the two axles 21 are located below the frame assembly 1, the two AGV brackets 4 are located at both ends of the frame assembly 1 in the length direction, and the shell 3 is arranged on the periphery of the frame assembly 1; a high-voltage cabinet 5, a low-voltage cabinet 6, a battery cabinet 7, a hydraulic hydrogen fuel cabinet 8 and a liquid cooling cabinet 9 are arranged on both sides of the frame assembly 1; the upper bearing surface of the frame assembly 1 is greater than two meters above the ground.

[0008] From the above description, it can be seen that the beneficial effects of the present invention are: the lightweight unmanned container transport vehicle provided by the present invention adopts a two-bridge layout, and the overall frame can be raised by about 2.3m, that is, the upper load-bearing surface of the frame assembly is about 2.3m above the ground. Compared with the existing four-bridge layout, a high and sufficient repair and maintenance space is reserved at the bottom, which meets the needs of safe and efficient repair and maintenance; although the total weight is slightly increased compared with before, the load is doubled through the optimization of the spatial layout; by carrying a detachable modular equipment cabinet, each device is allocated to the equipment cabinet according to its type, which is convenient for replacement and greatly reduces the difficulty of equipment maintenance; the whole vehicle loading height can meet the default box placement height recognized by the unmanned shore crane model, which is convenient for use in ports for fully unmanned automated operations. The lightweight unmanned container transport vehicle provided by the present invention adds a hydrogen fuel extended-range hybrid power that can be replaced with hydrogen for energy replenishment, and adds a fast energy replenishment method, so that fast energy replenishment at any position in the work site and ultra-long endurance of the lightweight unmanned container transport vehicle can be achieved, further improving transportation efficiency. Figure 5 The dotted part is the maintenance space.

[0009] Furthermore, an inverter module (such as a rectifier, an input reactor, a filter reactor, a filter capacitor, a pre-charged lightning protection component, etc.) installed in the high-voltage cabinet 5 can be directly connected to the port high-voltage AC power grid for charging.

[0010] Further, refer to Figure 6 and Figure 7The frame assembly 1 includes a main frame 11 and a sub-frame 12 connected by riveting; at least one sub-frame 12 is respectively provided at both ends of the main frame 11 in the length direction, and the sub-frame 12 is arranged on the lower side of the main frame 11.

[0011] Further, refer to Figure 6 and Figure 7 The main frame 11 includes at least two mutually parallel main longitudinal beams and at least two main cross beams; the main cross beam is arranged between two oppositely arranged main longitudinal beams and is perpendicular to the main longitudinal beams. The more main cross beams there are, the stronger the bearing capacity of the main frame 11. The sub-frame 12 includes at least two mutually parallel secondary longitudinal beams and at least two secondary cross beams. The structure of the secondary cross beam is the same as that of the main cross beam, and the difference between the secondary longitudinal beam and the main longitudinal beam is that an arc-shaped clearance groove is opened at one end of the secondary longitudinal beam to provide more maintenance space.

[0012] From the above description, it can be seen that by adding a sub-frame in the height direction of the main frame, the torsional and bending resistance of the frame assembly is greatly improved, so that the high-voltage cabinet, low-voltage cabinet, battery cabinet, etc. can be integrated on the frame to ensure the carrying capacity of the unmanned container transport vehicle. At the same time, sub-frames are respectively arranged at both ends of the main frame to keep the load of the frame assembly balanced.

[0013] Further, refer to Fig.12 and 13 The axle 21 is connected to the frame assembly 1 through a suspension 22, and the suspension 22 includes an H-shaped frame 221 and an elastic element 222 arranged thereon. The elastic element 222 includes a bottom steel plate, a rubber elastic member and a top steel plate arranged in sequence from bottom to top.

[0014] As can be seen from the above description, the elastic element is connected to the side of the main frame and the subframe through the connecting assembly. The above connecting structure realizes the integrated connection of the main frame, the subframe and the suspension. The matching structure of the above frame assembly and the axle can double the load after changing from four axles to two axles.

[0015] Further, refer to Figure 1 The AGV bracket 4 includes a base 41 and a bracket 42 rotatably connected to the base 41; the base 41 limits the lower container in the width direction, and the bracket 42 limits the upper container in the width direction.

[0016] From the above description, it can be seen that the AGV bracket is detachably connected to the frame assembly. By setting the AGV bracket, it is possible to achieve upper and lower double layers, that is, the simultaneous transportation of two 40-foot containers, which significantly improves the loading and unloading efficiency without affecting the original transportation capacity.

[0017] Further, refer to Figure 8 and Fig. 9The outer shell 3 includes a frame 31 and a skin 32 detachably connected to the frame 31 .

[0018] From the above description, it can be seen that the skin and the frame are not an integrated structure. The skin and the frame at different positions have different shapes and sizes. The skin and the frame are connected with screws. When there is an emergency repair or other need, such as the need to replace the hydraulic oil pump or hydraulic motor, the connection structure between the skin and the frame at any position can be simply disassembled. Under non-workshop conditions and with the cooperation of a forklift, the key components can be quickly replaced in a short time in the working environment. It overcomes the difficulty of disassembling the outer shell during maintenance of traditional unmanned container transport vehicles. The skin and the frame are welded, and the entire assembly needs to be disassembled for emergency repairs, resulting in high maintenance costs.

[0019] Furthermore, the high-voltage cabinet 5 , the low-voltage cabinet 6 , the battery cabinet 7 , the hydraulic hydrogen fuel cabinet 8 and the liquid cooling cabinet 9 are connected to the frame assembly 1 via a boom bracket 10 .

[0020] From the above description, it can be seen that a hydrogen fuel cell and a hydrogen storage system are arranged in the hydraulic hydrogen fuel cabinet, and a detachable loading method is adopted, which can realize two energy replenishment methods: hydrogen replacement and hydrogen refueling; at the same time, it can overcome the problem that when the unmanned container transport vehicle is a pure electric energy source, it can only be recharged by DC charging through a charging pile, and the energy replenishment speed is slow.

[0021] Further, refer to Fig.10 and Fig.11 The boom support 10 includes two symmetrically arranged cantilevers 101 and a supporting frame 102 , and the supporting frame 102 is arranged through the two cantilevers 101 .

[0022] From the above description, it can be seen that the cantilever is connected to the main frame, and the cabinet is mounted on the support frame, thereby realizing the rapid connection and disassembly of each cabinet and the frame assembly. Moreover, this cantilever bracket is lightweight, which is conducive to reducing the weight of the whole vehicle, improving energy efficiency and load capacity. At the same time, a shock absorber can be further installed at the position where the cabinet is set on the support frame to effectively protect the carried equipment from impact and vibration during transportation, extend the service life of the equipment and improve the operating stability.

[0023] Further, refer to Figure 3 , the high-voltage cabinet 5 and the low-voltage cabinet 6 are located on different sides of the frame assembly 1, and the battery cabinet 7 and the hydraulic hydrogen fuel cabinet 8 are located on different sides of the frame assembly 1. Preferably, the high-voltage cabinet 5, the battery cabinet 7 and the liquid cooling cabinet 9 are arranged on one side, and the low-voltage cabinet 6 and the hydraulic hydrogen fuel cabinet 8 are arranged on the other side.

[0024] Furthermore, the frame assembly 1 is provided with a side guard cantilever 13 and a downward pressure detection mechanism 14; the side guard cantilever 13 and the downward pressure detection mechanism 14 are distributed on both sides of the frame assembly 1; the side guard cantilever 13 is used to limit the position of the container, and the downward pressure detection mechanism 14 is used to detect whether there is a container and identify the type of container. Fourteen downward pressure detection mechanisms 14 can be set, seven on each side of the frame assembly 1, including three in the middle of a single side and two near each end. The side guard cantilever 13 and the downward pressure detection mechanism 14 are both detachably connected to the frame assembly 1, preferably by riveting.

[0025] As can be seen from the above description, the side guard cantilever is an overall upwardly lifted structure, which can prevent the container from shifting in the width direction of the frame assembly. At the same time, it is connected to the frame assembly by riveting, which is convenient for disassembly for maintenance work such as rust prevention and repainting. The side guard cantilever can be provided with a mounting hole for installing a downward pressure detection mechanism, so that the downward pressure detection mechanism is located in the container loading area, and can be used to identify whether there is a container at its position. At the same time, by arranging it at different positions, it can realize the identification of different types of containers and quantities.

[0026] Furthermore, more than 80% of the hydraulic pipelines of the lightweight unmanned container transport vehicle are hard pipes (stainless steel pipes), and the rest are soft pipes.

[0027] From the above description, it can be seen that only a small part of the moving parts, the connection between the steering valve group and the steering cylinder, the brake cylinder of the steering axle brake system to the middle of the axle, and the rear of the hydraulic station to the main oil pipe, retain the use of hoses, avoiding the problem of limited service life of hoses, easy aging, and regular replacement. At the same time, it also reduces the problem of hydraulic system failure due to cracking and oil leakage of hoses, thereby reducing the cost of use and the probability of failure.

[0028] Furthermore, it also includes a high-voltage AC busbar charging device, which can be charged during operation intervals, so that the vehicle can be quickly charged and have a long endurance at any location in the operation site.

[0029] In one or more embodiments: A lightweight unmanned container transport vehicle comprises a frame assembly 1, two axles 21 connected to the frame assembly 1, a housing 3 and two AGV brackets 4; Two axles 21 are located below the vehicle frame assembly 1, two AGV brackets 4 are located at both ends of the vehicle frame assembly 1 in the length direction, and the housing 3 is arranged on the periphery of the vehicle frame assembly 1; high-voltage cabinets 5, low-voltage cabinets 6, battery cabinets 7, hydraulic hydrogen fuel cabinets 8 and liquid cooling cabinets 9 are arranged on both sides of the vehicle frame assembly 1, the high-voltage cabinets 5, battery cabinets 7 and liquid cooling cabinets 9 are arranged on one side, and the low-voltage cabinets 6 and hydraulic hydrogen fuel cabinets 8 are arranged on the other side; the upper bearing surface of the vehicle frame assembly 1 is 2.3m above the ground; The frame assembly 1 includes a main frame 11 and a sub-frame 12 connected by riveting; at least one sub-frame 12 is respectively provided at both ends of the main frame 11 in the length direction, and the sub-frame 12 is arranged on the lower side of the main frame 11; the main frame 11 and the sub-frame 12 are connected by riveting; The axle 21 is connected to the frame assembly 1 through a suspension 22, and the suspension 22 includes an H-shaped frame 221 and an elastic element 222 arranged thereon; the elastic element 222 includes a bottom steel plate, a rubber elastic member and a top steel plate arranged in sequence from bottom to top; The frame assembly 1 is provided with a side guard cantilever 13 and a downward pressure detection mechanism 14; the side guard cantilever 13 and the downward pressure detection mechanism 14 are distributed on both sides of the frame assembly 1; the side guard cantilever 13 is used to limit the position of the container, and the downward pressure detection mechanism 14 is used to detect whether there is a container and identify the type of the container; seven downward pressure detection mechanisms 14 are arranged on both sides of the frame assembly 1, including three in the middle and two near each end; The AGV bracket 4 includes a base 41 and a bracket 42 rotatably connected to the base 41; the base 41 limits the lower container in the width direction, and the bracket 42 limits the upper container in the width direction; the base 41 of the AGV bracket is connected to the side guard cantilever 13 located at both ends of the frame assembly 1 by riveting; The outer shell 3 includes a frame 31 and a skin 32 detachably connected to the frame 31 by screws; The high-voltage cabinet 5, the low-voltage cabinet 6, the battery cabinet 7, the hydraulic hydrogen fuel cabinet 8 and the liquid cooling cabinet 9 (water cooling) are connected to the frame assembly 1 through the boom bracket 10; The boom support 10 includes two symmetrically arranged cantilevers 101 and a support frame 102, and the support frame 102 is arranged through the two cantilevers 101; the cantilever 101 is connected to the main frame 11, and the high-voltage cabinet 5, the low-voltage cabinet 6, the battery cabinet 7, the hydraulic hydrogen fuel cabinet 8 and the liquid cooling cabinet 9 are mounted on the support frame 102; More than 80% of the hydraulic lines of the lightweight unmanned container transporter are stainless steel pipes, and the rest are hoses; The lightweight unmanned container transport vehicle is provided with a high-voltage AC busbar charging device, and the hydraulic hydrogen fuel cabinet 8 is provided with a hydrogen fuel cell and a quick-detachable hydrogen storage tank.

[0030] To sum up, the lightweight unmanned container transport vehicle provided by the present invention retains the lightweight structure of the previous generation, and its weight has increased slightly compared with the previous one, from four bridges to two bridges, but the height of the cargo platform has been greatly increased from 1.5 meters to 2.3 meters, doubling the load; by optimizing the spatial layout, the maintenance space of the product has been greatly improved, and a detachable modular equipment cabinet is installed to realize rapid equipment replacement and maintenance; the charging method has added an AC busbar charging function, and the power has added a hydrogen fuel extended-range hybrid power that can be replaced with hydrogen for energy replenishment, that is, it combines four charging modes of hydrogen replacement, hydrogen refueling, busbar charging, and manual emergency charging, which greatly increases the energy replenishment efficiency and improves the operating efficiency, so that the lightweight unmanned container transport can achieve rapid energy replenishment and ultra-long endurance at any location in the work site; by carrying an AGV bracket, the carrying efficiency can be doubled; the skeleton and the skin use a fully assembled structure, and in an emergency, key components can be quickly replaced with the assistance of a forklift at any site; the hydraulic pipeline of the whole vehicle has basically realized a basic full-hard pipe architecture, reducing the use cost and the probability of failure.

[0031] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lightweight unmanned container transport vehicle, characterized in that: It includes a frame assembly, two axles connected to the frame assembly, a shell and two AGV brackets; the two AGV brackets are located at the two ends of the frame assembly in the length direction, and the shell is arranged on the periphery of the frame assembly; high-voltage cabinets, low-voltage cabinets, battery cabinets, hydraulic hydrogen fuel cabinets and liquid cooling cabinets are arranged on both sides of the frame assembly; the upper bearing surface of the frame assembly is greater than two meters above the ground.

2. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: The frame assembly comprises a main frame and a sub-frame connected by riveting; at least one sub-frame is respectively provided at both ends of the main frame in the length direction, and the sub-frame is arranged on the lower side of the main frame.

3. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: The axle is connected to the frame assembly via a suspension, and the suspension comprises an H-shaped frame and an elastic element arranged thereon.

4. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: The AGV bracket includes a base and a bracket rotatably connected to the base; the base limits the position of the lower container in the width direction, and the bracket limits the position of the upper container in the width direction.

5. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: The shell includes a frame and a skin detachably connected to the frame.

6. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: The high-voltage cabinet, the low-voltage cabinet, the battery cabinet, the hydraulic hydrogen fuel cabinet and the liquid cooling cabinet are connected to the frame assembly through a boom bracket.

7. The lightweight unmanned container transport vehicle according to claim 6, characterized in that: The boom bracket comprises two symmetrically arranged cantilevers and a supporting frame, and the supporting frame is arranged through the two cantilevers.

8. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: The high-voltage cabinet and the low-voltage cabinet are located on different sides of the frame assembly, and the battery cabinet and the hydraulic hydrogen fuel cabinet are located on different sides of the frame assembly.

9. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: The frame assembly is provided with a side stop cantilever and a downward pressure detection mechanism; the side stop cantilever and the downward pressure detection mechanism are distributed on both sides of the frame assembly; the side stop cantilever is used to limit the container, and the downward pressure detection mechanism is used to detect whether there is a container and identify the type of container.

10. The lightweight unmanned container transport vehicle according to claim 1, characterized in that: It includes hydraulic pipelines, more than 80% of which are hard pipes, and the rest are soft pipes.

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