Underground logistics transportation motor car and transportation system

Abstract

The invention provides an underground logistics transportation bullet train and a transportation system, and relates to the technical field of logistics transportation, and the transportation bullet train comprises a bottom frame used for bearing goods to be transported; the two power bogies are arranged at the bottom of the chassis; the two hydraulic braking systems are arranged on the two power bogies correspondingly, and the output ends of the two hydraulic braking systems are used for braking the two power bogies correspondingly; the traction electric transmission system is arranged at the bottom of the bottom frame; the automatic driving vehicle-mounted signal system is arranged on the bottom frame; the vehicle-mounted control unit is electrically connected with the two power bogies, the two hydraulic braking systems, the traction electric transmission system and the automatic driving vehicle-mounted signal system; the transportation system does not occupy ground resources and is beneficial to relieving urban traffic congestion and improving living and traffic environment quality.

Description

Technical Field

[0001] This invention belongs to the field of logistics and transportation, and more specifically, relates to an underground logistics transportation vehicle and transportation system. Background Technology

[0002] Currently, there is some basic theoretical research on urban underground logistics transportation systems in China, but it mainly focuses on the planning and demonstration of underground logistics transportation systems. To date, research on underground logistics transportation equipment (vehicles) is limited, and no related products have been developed. Urban logistics transportation systems still primarily rely on ground transportation vehicles for goods transport, such as trucks and vans. While these modes of transportation are widely used, they face numerous problems and challenges due to rapid urban development and increasingly severe traffic congestion. For example: ① Traffic congestion. In medium and large cities, ground traffic congestion is severe, resulting in slow-moving logistics vehicles and low transportation efficiency. Traffic congestion is particularly severe during peak hours, greatly affecting the timeliness of logistics delivery. ② Heavy environmental burden. Ground logistics systems rely on traditional vehicles, and fuel-powered vehicles emit large amounts of carbon dioxide and other pollutants during transportation, increasing air and noise pollution. This does not meet the requirements of green and low-carbon development and threatens residents' health and reduces their quality of life. ③ High logistics costs. Fuel costs for ground transportation, time losses due to traffic congestion, and labor costs are all at a high level, increasing the operational burden on logistics companies. ④ Space constraints. Narrow roads and limited parking in city centers make it difficult for logistics vehicles to find suitable loading and unloading points, further reducing delivery efficiency. ⑤ Safety hazards. Frequent traffic accidents during ground logistics transportation pose significant safety risks, especially those involving large trucks.

[0003] As the final link in the supply chain, urban logistics and transportation systems play a vital economic and social role. However, with rapid market expansion, existing urban ground logistics and transportation systems have placed immense pressure on society and the environment. Accelerated urbanization and the continuous increase in population and vehicles have exacerbated problems such as road congestion and environmental pollution, making current logistics supply methods insufficient to meet the demands of low-carbon, intelligent, and high-quality urban development. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an underground logistics transport vehicle and system, thereby solving the problems mentioned in the background art, such as the enormous pressure that existing urban ground logistics transport systems have placed on society and the environment, and the increasing number of people and vehicles due to the rapid urbanization process, leading to more serious problems such as road congestion, environmental pollution, high logistics costs, space constraints, and safety hazards.

[0005] To achieve the above objectives, the present invention provides an underground logistics transport vehicle, the transport vehicle comprising: A chassis frame, used to carry goods to be transported; Two powered bogies are mounted at the bottom of the underframe; Two hydraulic braking systems are respectively installed on the two power bogies, and the output ends of the two hydraulic braking systems are respectively used to brake the two power bogies; A traction electric drive system, wherein the traction electric drive system is disposed at the bottom of the underframe; An autonomous driving vehicle signal system, wherein the autonomous driving vehicle signal system is mounted on the chassis; The vehicle control unit is electrically connected to the two power bogies, the two hydraulic braking systems, the traction electric drive system, and the autonomous driving vehicle signal system.

[0006] Preferably, the underground logistics transport vehicle further includes: The carriage is located on top of the underframe, and has two openings on both sides, each of which is hinged to a side door; Four side door opening and closing systems are provided, with one side door opening and closing system provided between each side door and the opening, and the vehicle control unit is electrically connected to the side door opening and closing system; Two coupler buffer systems are respectively connected to both ends of the underframe.

[0007] Preferably, the top of the base frame has eight load-bearing areas along its axis, each load-bearing area being used to hold a pallet, and the base frame includes: frame; A central crossbeam, the two ends of which are respectively connected to the middle of the two sides of the frame; Two reinforcing crossbeams are provided, one of which is provided on each side of the middle crossbeam, and the two ends of the reinforcing crossbeams are respectively connected to the two sides of the frame. Four supporting beams are provided, with two supporting beams on each side of the central beam, and a reinforcing beam between the two supporting beams on each side. The two ends of each supporting beam are connected to the two sides of the frame, and a load-bearing area is provided on both sides of each supporting beam.

[0008] Three longitudinal beams are arranged at intervals, and each longitudinal beam is connected to the middle crossbeam, the reinforcing crossbeam, and the supporting crossbeam; Flooring, the chassis being laid on the frame.

[0009] Preferably, the frame comprises: Two side beams and two end beams are provided, with the two side beams spaced apart. One end beam is connected to one end of each of the two side beams at both ends, and the other end beam is connected to the other end of each of the two side beams at both ends. The side beams are fish-belly shaped. Two traction beams, each of which is connected to one of the two end beams; Eight side support beams are provided, with four side support beams on each side of the central crossbeam, and the four side support beams on each side are used to connect to the power bogie.

[0010] Preferably, the hydraulic braking system includes: Two brake discs, the two brake discs being connected to the axles of the power bogie; Two brake calipers are mounted on the frame of the power bogie and are used to clamp the brake disc. A hydraulic brake control unit, which is connected to the two brake calipers via an oil circuit; An accumulator, wherein the accumulator is connected to the hydraulic brake control unit via an oil circuit; An auxiliary release device, which is connected to the two brake calipers via an oil circuit; An electronic control unit, which is electrically connected to the hydraulic brake control unit; A pump control module, which is electrically connected to the electronic control unit and the hydraulic brake control unit; A speed sensor is connected to the axle and is electrically connected to the electronic control unit; Two pressure sensors are connected to two brake calipers respectively, and the two pressure sensors are electrically connected to the electronic control unit.

[0011] Preferably, the traction electric drive system includes: A current collector, which is dynamically electrically connected to the power supply rail; A high-voltage electrical box, which is electrically connected to the current receiver; The traction inverter is electrically connected to the high-voltage electrical box and electrically connected to the two power bogies. An auxiliary converter is electrically connected to the output terminal of the high-voltage electrical box and to the auxiliary electrical components of the transport vehicle. An overvoltage suppression resistor is provided in the circuit of the traction inverter.

[0012] Preferably, the carriage includes: Two end walls, the bottoms of which are respectively connected to both ends of the base frame; A top frame plate, the two ends of which are respectively connected to the top of the two end walls; A pair of side columns, the bottom ends of the two side columns of the pair of side columns are respectively connected to the two sides of the base frame, the top ends of the two side columns of the pair of side columns are respectively connected to the two sides of the top frame plate, and the opening is formed between the end wall and the side columns.

[0013] Preferably, the high-voltage electrical box includes: Box; A three-position selector switch is installed inside the housing. The three-position selector switch can be switched to the power off position, the workshop power supply position, and the current collector power supply operation position. A traction fuse and an auxiliary fuse are respectively connected to the circuits of the traction inverter and the auxiliary converter.

[0014] An underground logistics transportation system, the transportation system comprising: A tunnel network, wherein the tunnels are used to connect multiple loading and unloading areas; Underground logistics transport vehicles are used to run on tracks within a network of tunnels. Multiple on-board control subunits are installed on multiple transport vehicles, and the multiple on-board control subunits are electrically connected to the on-board control units on the multiple transport vehicles; Multiple turnout control units are respectively installed in multiple turnout areas of the underground tunnel network, and the multiple turnout control units are electrically connected to the turnout mechanisms of the multiple turnout areas. Multiple loading and unloading control units are provided, and the multiple turnout control units are respectively located in multiple loading and unloading areas. The multiple loading and unloading control units are electrically connected to the loading and unloading mechanisms of the multiple loading and unloading areas. The dispatch center subunit is signal-connected to the vehicle control subunit and electrically connected to the turnout control unit and the loading and unloading control unit.

[0015] Preferably, the transportation system further includes one on-board control subunit that can be signal-connected to the turnout control unit, the loading and unloading control unit, and the other on-board control subunits; When one of the transport vehicles cannot determine the status of the preceding transport vehicle, the on-board control subunit of one of the transport vehicles establishes a connection with the adjacent front and rear turnout control units until the ID of the preceding transport vehicle is found and then the connection is disconnected. Once the ID of the preceding transport train is found, one of the transport trains establishes a connection with the preceding transport train until the preceding train passes through the turnout area or loading / unloading area and then disconnects. When one of the transport vehicles needs to pass through a turnout position or loading / unloading area, a connection is established with the turnout control unit or loading / unloading control unit ahead in the direction of travel, and the connection is disconnected when one of the transport vehicles safely passes through the turnout position area or loading / unloading area.

[0016] This invention provides an underground logistics transport vehicle and transport system, which has the following advantages: the underground logistics transport system utilizes multiple underground logistics transport vehicles to coordinate transportation in a tunnel network. Compared with traditional ground transportation, this transport system does not occupy ground resources, helps to alleviate urban traffic congestion, improves the quality of living and transportation environment, and the underground intensive transportation can also significantly reduce energy costs, while making up for the limitations and singularity of ground vehicle logistics.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0019] Figure 1 A side view of an underground logistics transport vehicle according to an embodiment of the present invention is shown. Figure 2 A side view of an underground logistics transport vehicle with its side door open, according to an embodiment of the present invention, is shown. Figure 3 A bottom view of the underframe structure of an underground logistics transport vehicle according to an embodiment of the present invention is shown; Figure 4 A bottom view schematic diagram of the hydraulic braking system of an underground logistics transport vehicle according to an embodiment of the present invention is shown; Figure 5 A side view of the carriage structure of an underground logistics transport vehicle according to an embodiment of the present invention is shown; Figure 6 A bottom view of the top frame structure of an underground logistics transport vehicle according to an embodiment of the present invention is shown; Figure 7 A bottom view schematic diagram of the traction electric drive system of an underground logistics transport vehicle according to an embodiment of the present invention is shown. Figure 8A schematic diagram of a hydraulic braking system on two power bogies of an underground logistics transport vehicle according to an embodiment of the present invention is shown. Figure 9 A flowchart of an underground logistics transportation system according to an embodiment of the present invention is shown; Figure 10 A real-time connection diagram of an underground logistics transportation system according to an embodiment of the present invention is shown; Figure 11 A connection diagram is shown for an underground logistics transportation system according to an embodiment of the present invention when the operating condition of the preceding transportation vehicle cannot be determined by the transport vehicle. Figure 12 The diagram illustrates a connection of an underground logistics transportation system according to an embodiment of the present invention when a transport vehicle needs to pass through a turnout. Figure 13 The diagram shows a connection of a transport vehicle in an underground logistics transport system according to an embodiment of the present invention when it needs to pass through a loading and unloading process. Figure 14 A connection diagram is shown for determining the operating conditions of a forward transport vehicle in an underground logistics transport system according to an embodiment of the present invention. Figure 15 The diagram illustrates the connection of a transport vehicle in an underground logistics transport system according to an embodiment of the present invention when the transport vehicle is in the forward transport vehicle operating condition and needs to pass through a turnout; Figure 16 The diagram illustrates the connection of a transport vehicle in an underground logistics transport system according to an embodiment of the present invention when the vehicle is in the forward transport vehicle operating condition and needs to pass through the loading and unloading operating condition.

[0020] Explanation of reference numerals in the attached figures: 1. Underframe; 1.1 Traction beam; 1.2 Side beam; 1.3 Middle crossbeam; 1.4 Support crossbeam; 1.5 Reinforcing crossbeam; 1.6 Longitudinal beam; 1.7 End beam; 1.8 Side bearing support beam; 2. Hydraulic braking system; 2.1 Auxiliary release device; 2.2 Hydraulic brake control unit; 2.3 Electronic control unit; 2.4 Accumulator; 2.5 Brake disc; 2.6 Brake caliper; 2.7 Speed ​​sensor; 2.8 Pump control module; 3. Car body; 3.1 End wall; 3.2 Top frame plate; 3.3 Side columns; 3.4 Top end beam; 3.5 Longitudinal beam; 3.6 Cross beam; 3.7 Connecting beam; 4. Traction electric drive system; 4.1 Current collector; 4.2 Traction inverter; 4.3 Overvoltage suppression resistor; 4.4 High voltage electrical box; 4.5 Auxiliary converter; 4.6 Traction motor; 5. Side door; 6. Power bogie; 7. Coupler and buffer system; 8. Side door opening and closing system; 9. Fixing device; 10. Automatic driving vehicle signal system; 11. Pallet. Detailed Implementation

[0021] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0022] like Figure 1 As shown, the present invention provides an underground logistics transport vehicle, the transport vehicle comprising: Base frame 1, used to carry the goods to be transported; Two powered bogies 6 are mounted at the bottom of the base frame 1; Two hydraulic braking systems 2 are respectively installed on two power bogies 6, and the output ends of the two hydraulic braking systems 2 are used to brake the two power bogies 6 respectively. Traction electric drive system 4 is installed at the bottom of the base frame 1; The autonomous driving vehicle signal system 10 is mounted on the chassis. The vehicle control unit is electrically connected to two power bogies 6, two hydraulic braking systems 2, a traction electric drive system 4, and an autonomous driving vehicle signal system 10.

[0023] Specifically, to address the enormous pressure that existing urban ground logistics transportation systems place on society and the environment, and the increasing population and vehicle numbers due to rapid urbanization leading to more severe problems such as road congestion, environmental pollution, high logistics costs, space constraints, and safety hazards, this invention provides an underground logistics transportation vehicle. This underground logistics transportation system utilizes multiple underground logistics transportation vehicles to coordinate transportation within a tunnel network. Compared to traditional ground transportation, this system does not occupy ground resources, helps alleviate urban traffic congestion, improves the quality of the living and transportation environment, and the intensive underground transportation can also significantly reduce energy costs, while compensating for the limitations and singularity of ground-based vehicle logistics.

[0024] like Figure 2 As shown, preferably, the underground logistics transport vehicle also includes: Carriage 3 is located on top of the base frame 1. Carriage 3 has two openings on both sides, and each opening is hinged to a side door 5. Four side door opening and closing systems 8 are provided, with one side door opening and closing system 8 between each side door 5 and the opening, and the vehicle control unit is electrically connected to the side door opening and closing system 8; Two coupler buffer systems 7 are connected to both ends of the underframe 1.

[0025] Specifically, according to the usage requirements of the transport vehicle, both sides of the transport vehicle must meet the requirements for loading and unloading pallets. Each set of pallets requires side doors 5 on both sides. Therefore, the side doors 5 on both sides of each set of pallets are considered as one group. Due to the width of the carriage 3, the opening and closing systems 8 of the side doors 5 on both sides are arranged in an alternating manner. The side door 5 mainly consists of a side door panel, an opening and closing mechanism, and a locking device.

[0026] This transport train operates as a single vehicle. Its rescue coupler and buffer system 7 primarily functions as a rescue coupling and traction system for the transport train. When a single transport train malfunctions and cannot operate normally, it can be coupled with another transport train and towed to the maintenance workshop (depot). Aside from uncoupling, coupling is achieved only after a slight collision between the transport trains, while also meeting requirements for light weight, small size, and relatively simple structure. In operation, coupling two transport trains ensures the train can smoothly pass through R50m curves while meeting the load requirements of the transport trains. The coupler and buffer system 7 mainly consists of four parts: an installation system, a buffer system, a centering and suspension system, and a coupling system.

[0027] like Figure 3 As shown, preferably, the top of the base frame 1 is provided with eight bearing areas along the axis of the base frame 1, each bearing area is used to hold a tray 11, and the base frame 1 includes: frame; The middle crossbeam 1.3 has two ends connected to the middle of both sides of the frame; Two reinforcing crossbeams 1.5 are provided on each side of the middle crossbeam 1.3, and the two ends of the reinforcing crossbeams 1.5 are connected to the two sides of the frame respectively. There are four supporting beams 1.4. Two supporting beams 1.4 are set on each side of the middle beam 1.3. A reinforcing beam 1.5 is set between the two supporting beams 1.4 on each side. The two ends of the supporting beams 1.4 are connected to the two sides of the frame respectively. A load-bearing area is set on both sides of each supporting beam 1.4.

[0028] Three longitudinal beams 1.6 are spaced apart, and each longitudinal beam 1.6 is connected to the middle crossbeam 1.3, the reinforcing crossbeam 1.5, and the supporting crossbeam 1.4; The flooring and base are laid on the frame; The framework includes: Two side beams 1.2 and two end beams 1.7 are provided, with the two side beams 1.2 spaced apart. The two ends of one end beam 1.7 are connected to one end of each of the two side beams 1.2, and the two ends of the other end beam 1.7 are connected to the other ends of each of the two side beams 1.2. The side beams 1.2 are fish-belly shaped. Two traction beams 1.1 are connected to two end beams 1.7 respectively; Eight side support beams 1.8, four side support beams 1.8 are provided on each side of the central crossbeam 1.3, and the four side support beams 1.8 on each side are used to connect with the power bogie 6.

[0029] Specifically, each load-bearing area is equipped with a pallet 11 by a fixing device 9. The fixing device 9 is existing technology. The external dimensions of the pallet 11 conform to the international standard pallet of ISO 6780-2003 (1200mm×1000mm×150mm), which meets the requirements of the application environment in a small-diameter underground tunnel of 3500mm. Under the premise of meeting transportation requirements, the length of the underframe 1 is shortened to the maximum extent to reduce the vehicle's weight and improve the vehicle's ability to pass through curves.

[0030] Because the transport vehicle uses a single-axle powered bogie 6 with a relatively large self-weight, which accounts for nearly half of the transport vehicle's self-weight, and various system components also need to be installed on the transport vehicle, the self-weight of the transport vehicle is insufficient. As the main load-bearing structure, the underframe 1 should have the characteristics of low self-weight and high load-bearing capacity. When designing the underframe 1, the lightweight optimization of each component should be carried out on the premise of ensuring structural strength. Since the underframe 1 structure without a central beam has the characteristics of good load-bearing structural strength and low self-weight, the underframe structure of the urban underground logistics transport vehicle adopts a central beam-less frame load-bearing structure.

[0031] Based on the interface and pallet (cargo) location of each system component of the transport vehicle, the structure, strength, and rigidity of the underframe 1 are analyzed. After comprehensive consideration and optimization, the composition scheme of the underframe 1 of the transport vehicle is as follows: the underframe 1 is a frame-type all-steel welded structure without a central beam, mainly composed of traction beam 1.1, side beam 1.2, central crossbeam 1.3, support crossbeam 1.4, reinforcing crossbeam 1.5, longitudinal beam 1.6, end beam 1.7, etc., and the main plates are made of Q450NQR1 high-strength weathering steel. The traction beam 1.1 is a double-web variable cross-section box structure with a traction seat, formed by welding upper and lower cover plates and web plates; the side beam 1.2 is a single H450×200×8×13mm steel section bent into a fish belly shape; the middle cross beam 1.3 is an I-shaped structure formed by welding upper and lower cover plates and web plates; the longitudinal beam 1.6 is a channel-shaped structure formed by pressing steel plates; the end beam 1.7 is an L-shaped structure formed by pressing steel plates and welding it with the lower cover plate to form a channel-shaped structure; the pallet 11 (cargo) bearing position is provided with a support cross beam 1.4 of a channel-shaped structure formed by pressing steel plates; the corresponding position of the rubber side bearing of the power bogie 6 is provided with a side bearing support beam 1.8 of a channel-shaped structure; a 5mm thick steel floor is laid on the base frame 1.

[0032] like Figure 4 and Figure 8 As shown, preferably, the hydraulic braking system 2 includes: Two brake discs 2.5 are connected to the axle of the power bogie 6; Two brake calipers 2.6 are mounted on the frame of the power bogie 6, and the two brake calipers 2.6 are used to clamp the brake disc 2.5 respectively; The hydraulic brake control unit 2.2 is connected to the two brake calipers 2.6 via an oil circuit. Accumulator 2.4 is connected to hydraulic brake control unit 2.2 via an oil circuit; The auxiliary release device 2.1 is connected to the two brake calipers 2.6 via an oil circuit; Electronic control unit 2.3 is electrically connected to hydraulic brake control unit 2.2; Pump control module 2.8, which is electrically connected to electronic control unit 2.3 and hydraulic brake control unit 2.2; Speed ​​sensor 2.7 is connected to the axle and is electrically connected to electronic control unit 2.3; Two pressure sensors are connected to the two brake calipers 2.6 respectively, and the two pressure sensors are electrically connected to the electronic control unit 2.3.

[0033] Specifically, the transport vehicle employs an axle-controlled hydraulic braking system, assembled from an auxiliary release device 2.1, a hydraulic brake control unit (HBCU) 2.2, an electronic brake control unit (EBCU) 2.3, a pump control module 2.8, an accumulator 2.4, a brake disc 2.5, two brake calipers 2.6, a speed sensor 2.7, and connected cables and pipes. Each axle of the power bogie 6 is equipped with an independent hydraulic brake system 2. This hydraulic brake system 2 receives commands from the onboard control unit and controls the braking force of the corresponding axle. After receiving a release command from the transport vehicle control unit, the hydraulic brake control unit 2.2 builds up the pressure required for release; upon receiving a braking command from the onboard control unit, the hydraulic brake control unit 2.2 applies the required braking pressure based on the braking command. The electronic brake control unit 2.3 receives data from the pressure sensor and speed sensor 2.7 to calculate the braking force, thereby controlling the hydraulic brake control unit 2.2 to adjust the pressure of the two brake calipers 2.6 to achieve mechanical braking. Simultaneously, the electronic brake control unit 2.3 feeds back fault or warning information to the onboard control unit.

[0034] An accumulator 2.4 (2.8L, an energy storage container connected to the hydraulic brake control unit) is paired with the hydraulic brake control unit 2.2 to store energy, reducing the workload of the hydraulic pump in the hydraulic brake control unit 2.2. Simultaneously, in the event of a hydraulic pump malfunction or power loss, the accumulator 2.4 can complete at least three braking / releasing cycles. When the hydraulic brake system 2 is operating, hydraulic oil flows from the hydraulic pump and solenoid valve of the hydraulic brake control unit 2.2 to the accumulator 2.4. When oil needs to be supplied to the brake caliper 2.6, the solenoid valve of the hydraulic brake control unit 2.2 opens, and the accumulator 2.4 outputs pressure to the brake caliper 2.6 through the solenoid valve, thus actuating the brake caliper 2.6.

[0035] Each axle is equipped with two sets of passive hydraulic brake calipers 2.6 and brake discs 2.5. The brake calipers 2.6 are spring-operated and have both hydraulic and manual release functions. Manual release is achieved via adjusting nuts, ensuring emergency response in case of failure and initial adjustment of brake shoe clearance when replacing brake pads. Each axle control unit is equipped with an auxiliary release device 2.1 for remote release of the spring-operated brake calipers 2.6. Each axle end is equipped with a multi-channel speed sensor 2.7, which generates a speed signal and transmits it to the electronic brake control unit 2.3. When the hydraulic pressure drops to 0 bar, maximum braking force is applied, the hydraulic pressure rises, and the brake calipers 2.7 gradually release.

[0036] The electronic brake control unit 2.3 controls the start and stop of the hydraulic pump in the hydraulic brake control unit 2.2 via the pump control module 2.8 (PCM), and has soft-start function and current-limiting overload protection function. To save layout space, the electronic brake control unit 2.3 and the pump control module 2.8 are integrated into a single mounting box.

[0037] The auxiliary release device 2.1 is used to provide auxiliary release of the brake caliper 2.6 under fault conditions. When electric auxiliary release is required, triggering the auxiliary release button or switch in the driver's cab energizes the two-position two-way solenoid valve, activating the auxiliary release device. Simultaneously, a pressure switch sends a signal to start the hydraulic pump, which outputs hydraulic oil to the auxiliary release circuit. When the pressure in the circuit reaches the upper operating point of the pressure switch, the hydraulic pump stops working. When the pressure in the circuit drops below the lower set value of the pressure switch, the hydraulic pump restarts until the pressure reaches the upper operating point again. When the electro-hydraulic pump stops working, the check valve prevents hydraulic oil backflow, maintaining the pressure in the auxiliary release circuit. When the pressure in the auxiliary release circuit reaches the release pressure of the brake caliper 2.6, the pressure switch outputs an auxiliary release status signal to the vehicle control unit.

[0038] To save installation space at the bottom of the transport vehicle, the electronic brake control unit 2.3 and the pump control module 2.8 are integrated into a dedicated mounting box and connected to the hydraulic control unit 2.2 via cables. The hydraulic brake control unit 2.2 is connected to the accumulator 2.4 via a 12*1.5mm stainless steel pipe, and a quick-connect fitting is provided at the connection interface of the hydraulic brake control unit 2.2; the hydraulic brake control unit 2.2 is connected to the brake caliper 2.6 via an 8*1mm stainless steel pipe and a tee fitting; the auxiliary release device 2.1 is connected to the brake caliper 2.6 via an 8*1mm stainless steel pipe and a tee fitting, and a quick-connect fitting is provided at the connection interface of the auxiliary release device 2.1.

[0039] like Figure 7 As shown, preferably, the traction electric drive system 4 includes: Current collector 4.1 is dynamically electrically connected to the power supply rail; High-voltage electrical box 4.4 is electrically connected to current collector 4.1; Traction inverter 4.2 is electrically connected to high-voltage electrical box 4.4 and to two power bogies 6. Auxiliary converter 4.5 is electrically connected to the output terminal of high-voltage electrical box 4.4, and is electrically connected to the auxiliary electrical components of the transport vehicle. Overvoltage suppression resistor 4.3 is installed in the circuit of traction inverter 4.2.

[0040] Specifically, the traction electric drive system 4 is hoisted under the base frame 1. The DC 750V current is supplied to the traction electric drive system 4 of the transport vehicle through the third rail current collector 4.1, and then to the traction inverter 4.2 and auxiliary converter 4.4 through the high-voltage electrical box 4.4.

[0041] The auxiliary converter 4.5 is installed on the side wall of the high-voltage electrical box 4.4. The auxiliary converter 4.5 mainly provides DC24V power to the control of the traction system of the power bogie 6, the control of the auxiliary power system, communication equipment, hydraulic braking system 2, side door opening and closing device 8 and vehicle control unit.

[0042] Based on the operational requirements of the transport vehicle and the main circuit architecture of the traction system, the traction inverter 4.2 adopts a 2C2M drive control mode. Each traction inverter 4.2 contains two power modules used to control the two traction motors 4.6 of the traction system. The traction inverter 4.2 has a certain ability to withstand sudden changes in input voltage and provides protection against input overvoltage, input undervoltage, output overvoltage, and overheating faults. It also has protection against output load overcurrent, phase loss, and short circuit faults. The traction inverter 4.2 has an automatic restart function in the over-power-out zone.

[0043] Specifically, the overvoltage suppression resistor 4.3 contains two sets of resistor circuits, used during the resistive braking operation of the traction inverter 4.2 to dissipate the energy generated by the traction motor during braking. The design of the overvoltage suppression resistor 4.3 is matched with the electrical parameters of the traction inverter 4.2. The chopper and overvoltage suppression resistor body of the overvoltage suppression resistor 4.3 have complete detection and protection. The heat generated by the overvoltage suppression resistor 4.3 will not have any adverse effects on other equipment under the vehicle or on the transport vehicle.

[0044] The traction motor 4.6 is a three-phase asynchronous motor. During traction, the traction motor 4.6 converts the electrical energy supplied by the traction inverter 4.2 into mechanical energy, which is then transmitted to the wheelset via a gear transmission. During braking, the traction motor 4.6 converts the mechanical energy generated by the wheelset into electrical energy, which is then fed back to the power grid via the traction inverter 4.2 (regenerative braking); or it is consumed by the overvoltage suppression resistor 4.3 via the braking chopper module (resistive braking). When the wheels wear to the specified limit, the traction motor 4.6 can operate safely at a speed equivalent to the maximum speed of the transport vehicle.

[0045] like Figure 5 and Figure 6 As shown, preferably, the carriage 3 includes: The bottoms of the two end walls 3.1 are respectively connected to the two ends of the base frame 1; Top frame plate 3.2, both ends of top frame plate 3.2 are connected to the top of the two end walls 3.1 respectively; A pair of side columns 3.3, the bottom ends of the two side columns 3.3 are respectively connected to the two sides of the base frame 1, and the top ends of the two side columns 3.3 are respectively connected to the two sides of the top frame plate 3.2. An opening is formed between the end wall 3.1 and the side columns 3.3.

[0046] Specifically, while meeting the requirements for cargo transportation, the standard pallet 11 is centrally positioned to minimize the width of the cargo compartment, thereby reducing the vehicle's weight. The cargo compartment 3 provides an independent, enclosed box structure for loading goods, mainly composed of end walls 3.1, a top frame plate 3.2, and side columns 3.3. The end walls 3.1, top frame plate 3.2, and side columns 3.3 work together to form four 1800mm × 5000mm door frames for installing side doors 5. To reduce the weight of the compartment while meeting strength requirements, the top frame plate 3.2 includes two top end beams 3.4, two top longitudinal beams 3.5, multiple top transverse beams 3.6, two connecting beams 3.7, and a top cover. The top frame structure is formed by connecting two top end beams 3.4 and two top longitudinal beams 3.5. Multiple top transverse beams 3.6 are connected to the inside of the frame. Two connecting beams 3.7 are connected between the two top transverse beams 3.6 in the middle. The top cover plate is connected to the top frame structure. All components of the top frame plate 3.2 are made of aluminum alloy profiles of the same material but different specifications, and are connected and fixed by profile fittings. The end plates of the end walls 3.1 and the top cover plate of the top frame plate are made of 3mm aluminum sheets and are riveted to each connecting beam.

[0047] Preferably, the high-voltage electrical box 4.4 includes: Box; A three-position selector switch is installed inside the box. The three-position selector switch can switch to the power off position, the workshop power supply position, and the current collector power supply position. The traction fuse and the auxiliary fuse are connected to the circuits of the traction inverter 4.2 and the auxiliary converter 4.5, respectively.

[0048] Specifically, the high-voltage electrical box 4.4 is mounted on a base frame and contains a three-position selector switch, surge arrester, traction fuse, auxiliary fuse, and workshop power socket. The three-position selector switch is a multi-mode selector switch used for main circuit mode selection, with three modes: normal operation, grounding, and workshop power, for connecting the current collector main circuit, grounding, and workshop power plug. During vehicle maintenance and repair, the three-position selector switch, when in the ground position, physically disconnects the power supply to the traction inverter 4.2, auxiliary converter 4.5, and current collector 4.1, ensuring reliable grounding. This mechanical operation completely avoids the risk of electric shock to maintenance personnel during maintenance and repair, achieving the first level of high-voltage circuit safety protection. When operating within the vehicle depot, the three-position selector switch, in the workshop position, physically disconnects the power supply to the traction inverter 4.2, auxiliary converter 4.5, and current collector 4.1, while connecting the depot power supply to the auxiliary converter 4.5. The auxiliary converter 4.5 can then operate under depot power supply. During normal vehicle operation, the three-position selector switch, in the running position, allows the traction inverter 4.2 and auxiliary converter 4.5 to operate normally. Surge arresters are used to prevent damage to the insulation of electrical equipment from external overvoltages and overvoltages caused by misoperation, providing protection for the traction equipment. The traction fuse and auxiliary fuse are connected to the traction inverter 4.2 and auxiliary converter 4.5 respectively to provide overload and grounding protection and prevent grounding faults. The workshop power socket is used to supply power to the auxiliary converter 4.5 in the warehouse.

[0049] like Figure 9 and Figure 10 As shown, an underground logistics transportation system includes: Tunnel network, tunnels are used to connect multiple loading and unloading areas; Underground logistics transport vehicles are used to run on tracks within a network of tunnels. Multiple on-board control subunits are installed on multiple transport vehicles, and the multiple on-board control subunits are electrically connected to the on-board control units on the multiple transport vehicles; Multiple turnout control units are installed in multiple turnout areas of the underground tunnel network, and each turnout control unit is electrically connected to the turnout mechanism of the multiple turnout areas. Multiple loading and unloading control units and multiple turnout control units are respectively set in multiple loading and unloading areas, and the multiple loading and unloading control units are electrically connected to the loading and unloading mechanisms of the multiple loading and unloading areas respectively; The dispatch center subunit is signal-connected to the vehicle control subunit and electrically connected to the turnout control unit and loading / unloading control unit.

[0050] Specifically, the transportation system consists of a dispatch center subunit, an onboard control subunit, a turnout control unit, and a loading / unloading control unit. The onboard control subunit is located on each transport vehicle, with one unit installed on each vehicle, and performs functions such as speed measurement and positioning, route search, operational protection, operational control, and sleep / wake-up. The dispatch center subunit is located in the ground control center, and performs functions such as generating and issuing dispatch commands. The turnout control unit is located in the turnout area, with one unit installed at each turnout, and performs functions such as counting train IDs passing through the turnout, turningout operation, and turningout status monitoring. The loading / unloading control unit is located next to the loading / unloading mechanism, with one unit installed at each loading / unloading point, and performs functions such as operating the loading / unloading mechanism and monitoring its status.

[0051] like Figure 11 Figure 15 As shown, the branch control unit is connected to the dispatch center subunit via optical fiber; the loading and unloading control unit is connected to the dispatch center subunit via optical fiber; and the vehicle control subunit is connected to the dispatch center subunit in real time via wireless network.

[0052] Preferably, the transportation system further includes one on-board control subunit that can be signal-connected to the turnout control unit, the loading and unloading control unit, and the other on-board control subunits; When one of the transport vehicles cannot determine the status of the preceding transport vehicle, the on-board control subunit of one of the transport vehicles establishes a connection with the adjacent front and rear turnout control units until the ID of the preceding transport vehicle is found and then the connection is disconnected. When one of the transport vehicles needs to pass through the turnout area, a connection is established with the turnout control unit ahead in the direction of travel, and the connection is disconnected until the transport vehicle safely passes through the turnout area. When one of the transport vehicles moves to the front of the loading and unloading area, it establishes a connection with the loading and unloading control unit until the transport vehicle leaves the loading and unloading area and the connection is disconnected.

[0053] Once the ID of the preceding transport train is found, one of the transport trains establishes a connection with the preceding transport train until the preceding train passes through the turnout area or loading / unloading area and then disconnects. When one of the transport vehicles needs to pass through a turnout position or loading / unloading area, a connection is established with the turnout control unit or loading / unloading control unit ahead in the direction of travel, and the connection is disconnected when one of the transport vehicles safely passes through the turnout position area or loading / unloading area.

[0054] Specifically, the automated driving vehicle signaling system 10 is connected to the turnout control unit, loading and unloading control unit, and other automated driving vehicle signaling systems of transport vehicles via a wireless network on demand and in a time-sharing manner. The automated driving vehicle signaling system consists of an on-board host, a wireless unit, a beacon antenna, a wireless antenna, a speed sensor, a magnetic navigation sensor, and a millimeter-wave radar.

[0055] The automated driving onboard signaling system 10 provides functions such as automatic protection, automated driving, and sleep / wake-up for transport vehicles, working in conjunction with the onboard control unit to achieve fully automated operation control of the transport vehicles. The automated driving onboard signaling system can control train speed based on conditions such as track status, switch positions, and the position of the preceding train, preventing train overspeeding, ensuring safe headway between following trains, and achieving automatic train tracking operation in accordance with the fail-safe principle.

[0056] In summary, when the underground logistics transportation system of this application is implemented using an underground logistics transport vehicle, as the first transport vehicle in China specifically designed for 3500mm small-diameter underground tunnels, this invention fills a market gap and demonstrates independent innovation capabilities. Currently, the urban logistics industry urgently needs efficient and adaptable transportation solutions, and this invention, with its specialized design, precisely meets the diversified needs of modern urban logistics, demonstrating its potential to fundamentally improve transportation efficiency.

[0057] The transport vehicle has a load capacity of up to 16 tons and can transport eight pallets that meet the ISO 6780-2003 standard at the same time. This powerful load capacity not only reduces the number of transport trips and lowers the unit transport cost, but also significantly improves the efficiency of logistics operations, providing enterprises with considerable economic returns and contributing to the overall optimization of the supply chain.

[0058] The high-speed transport train can operate at a maximum speed of 80 km / h. This high-speed performance ensures the timeliness of the logistics system, meeting the needs of rapid urban delivery and enabling efficient and smooth logistics operations in busy urban environments. The high speed will directly promote the modernization of urban logistics networks and improve the responsiveness to the delivery of fast-moving consumer goods and emergency supplies.

[0059] This transport vehicle employs an advanced intelligent control system and multi-sensor fusion technology, achieving fully automated, driverless operation. This level of intelligence significantly enhances the system's safety and flexibility. As urban logistics environments become increasingly complex, adaptive transportation systems will be a future trend.

[0060] This transport vehicle utilizes a third-rail traction electric drive system, ensuring zero emissions and low noise during operation, fully demonstrating its responsibility to the ecological environment. This environmentally friendly feature aligns perfectly with national sustainable development policies, not only reducing negative impacts on urban air quality but also laying a solid foundation for building a green urban logistics system. Globally, green and environmentally friendly logistics solutions are receiving increasing attention, and this application will serve as an important tool for promoting the sustainable development of urban logistics.

[0061] This transport train utilizes a single-axle bogie, giving it excellent stability and maneuverability in confined underground tunnels and optimizing space utilization. Its scientifically designed structural layout ensures safe operation in complex environments and improves overall transport efficiency. This structural optimization not only enhances the train's adaptability but also provides a feasible technical solution for the future construction of underground logistics networks in more cities.

[0062] This transportation system utilizes clean energy and intelligent control technology, significantly reducing the energy consumption and maintenance needs of the transport vehicles over long-term use, thereby lowering operating costs. This economic advantage gives operating companies greater flexibility in cost control, promoting sustainable development in the industry. Simultaneously, the introduction of intelligent control technology reduces the risk of human error, enhancing overall transportation safety.

[0063] By integrating the aforementioned advantages, this application achieves efficient group pallet transportation, significantly improving the overall efficiency of urban logistics. High load capacity, high speed, intelligent operation, and environmentally friendly design work together to form an efficient and sustainable logistics ecosystem. This not only provides substantial economic benefits to enterprises but also makes a positive contribution to promoting the modernization and sustainable development of urban logistics.

[0064] The transport vehicle described in this application demonstrates significant advantages over existing technologies in terms of load-bearing capacity, speed, intelligence level, environmental protection characteristics, and economic benefits. Its advanced design concept and technological implementation provide new ideas and directions for the innovative development of the urban logistics industry, foreshadowing a completely new landscape for future logistics transportation.

[0065] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An underground logistics transport vehicle, characterized in that, The transport vehicle includes: A chassis frame, used to carry goods to be transported; Two powered bogies are mounted at the bottom of the underframe; Two hydraulic braking systems are respectively installed on the two power bogies, and the output ends of the two hydraulic braking systems are respectively used to brake the two power bogies; A traction electric drive system, wherein the traction electric drive system is disposed at the bottom of the underframe; An autonomous driving vehicle signal system, wherein the autonomous driving vehicle signal system is mounted on the chassis; The vehicle control unit is electrically connected to the two power bogies, the two hydraulic braking systems, the traction electric drive system, and the autonomous driving vehicle signal system.

2. The underground logistics transport vehicle according to claim 1, characterized in that, The underground logistics transport vehicle also includes: The carriage is located on top of the underframe, and has two openings on both sides, each of which is hinged to a side door; Four side door opening and closing systems are provided, with one side door opening and closing system provided between each side door and the opening, and the vehicle control unit is electrically connected to the side door opening and closing system; Two coupler buffer systems are respectively connected to both ends of the underframe.

3. The underground logistics transport vehicle according to claim 1, characterized in that, The top of the base frame has eight load-bearing areas along its axis, each load-bearing area being used to hold a tray. The base frame includes: frame; A central crossbeam, the two ends of which are respectively connected to the middle of the two sides of the frame; Two reinforcing crossbeams are provided, one of which is provided on each side of the middle crossbeam, and the two ends of the reinforcing crossbeams are respectively connected to the two sides of the frame. Four supporting beams are provided, with two supporting beams on each side of the central beam, and a reinforcing beam between the two supporting beams on each side. The two ends of the supporting beams are respectively connected to the two sides of the frame, and a load-bearing area is provided on both sides of each supporting beam. Three longitudinal beams are arranged at intervals, and each longitudinal beam is connected to the middle crossbeam, the reinforcing crossbeam, and the supporting crossbeam; Flooring, the chassis being laid on the frame.

4. The underground logistics transport vehicle according to claim 3, characterized in that, The framework includes: Two side beams and two end beams are provided, with the two side beams spaced apart. One end beam is connected to one end of each of the two side beams at both ends, and the other end beam is connected to the other end of each of the two side beams at both ends. The side beams are fish-belly shaped. Two traction beams, each of which is connected to one of the two end beams; Eight side support beams are provided, with four side support beams on each side of the central crossbeam, and the four side support beams on each side are used to connect to the power bogie.

5. The underground logistics transport vehicle according to claim 1, characterized in that, The hydraulic braking system includes: Two brake discs, the two brake discs being connected to the axles of the power bogie; Two brake calipers are mounted on the frame of the power bogie and are used to clamp the brake disc. A hydraulic brake control unit, which is connected to the two brake calipers via an oil circuit; An accumulator, wherein the accumulator is connected to the hydraulic brake control unit via an oil circuit; An auxiliary release device, which is connected to the two brake calipers via an oil circuit; An electronic control unit, which is electrically connected to the hydraulic brake control unit; A pump control module, which is electrically connected to the electronic control unit and the hydraulic brake control unit; A speed sensor is connected to the axle and is electrically connected to the electronic control unit; Two pressure sensors are connected to two brake calipers respectively, and the two pressure sensors are electrically connected to the electronic control unit.

6. The underground logistics transport vehicle according to claim 1, characterized in that, The traction electric drive system includes: A current collector, which is dynamically electrically connected to the power supply rail; A high-voltage electrical box, which is electrically connected to the current receiver; The traction inverter is electrically connected to the high-voltage electrical box and electrically connected to the two power bogies. An auxiliary converter is electrically connected to the output terminal of the high-voltage electrical box and to the auxiliary electrical components of the transport vehicle. An overvoltage suppression resistor is provided in the circuit of the traction inverter.

7. The underground logistics transport vehicle according to claim 2, characterized in that, The carriage includes: Two end walls, the bottoms of which are respectively connected to both ends of the base frame; A top frame plate, the two ends of which are respectively connected to the top of the two end walls; A pair of side columns, the bottom ends of the two side columns of the pair of side columns are respectively connected to the two sides of the base frame, the top ends of the two side columns of the pair of side columns are respectively connected to the two sides of the top frame plate, and the opening is formed between the end wall and the side columns.

8. The underground logistics transport vehicle according to claim 6, characterized in that, The high-voltage electrical box includes: Box; A three-position selector switch is installed inside the housing. The three-position selector switch can be switched to the power off position, the workshop power supply position, and the current collector power supply operation position. A traction fuse and an auxiliary fuse are respectively connected to the circuits of the traction inverter and the auxiliary converter.

9. An underground logistics transportation system, characterized in that, The transportation system includes: A tunnel network, wherein the tunnels are used to connect multiple loading and unloading areas; The underground logistics transport vehicle according to any one of claims 1-8 is used to run on tracks in a tunnel network; Multiple on-board control subunits are installed on multiple transport vehicles, and the multiple on-board control subunits are electrically connected to the on-board control units on the multiple transport vehicles; Multiple turnout control units are respectively installed in multiple turnout areas of the underground tunnel network, and the multiple turnout control units are electrically connected to the turnout mechanisms of the multiple turnout areas. Multiple loading and unloading control units are provided, and the multiple turnout control units are respectively located in multiple loading and unloading areas. The multiple loading and unloading control units are electrically connected to the loading and unloading mechanisms of the multiple loading and unloading areas. The dispatch center subunit is signal-connected to the vehicle control subunit and electrically connected to the turnout control unit and the loading and unloading control unit.

10. An underground logistics transportation system according to claim 9, characterized in that, The transportation system also includes one on-board control subunit that can be signal-connected to the turnout control unit, the loading and unloading control unit, and the other on-board control subunits; When one of the transport vehicles cannot determine the status of the preceding transport vehicle, the on-board control subunit of one of the transport vehicles establishes a connection with the control units of the two adjacent turnouts before and after it finds the ID of the preceding transport vehicle and then disconnects the connection. Once the ID of the preceding transport train is found, one of the transport trains establishes a connection with the preceding transport train until the preceding train passes through the turnout area or loading / unloading area and then disconnects. When one of the transport vehicles needs to pass through a turnout position or loading / unloading area, a connection is established with the turnout control unit or loading / unloading control unit ahead in the direction of travel, and the connection is disconnected when one of the transport vehicles safely passes through the turnout position area or loading / unloading area.

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