Unmanned logistics vehicle chassis and unmanned logistics vehicle

Abstract

The utility model provides an unmanned logistics vehicle chassis and an unmanned logistics vehicle. The unmanned logistics vehicle chassis comprises a vehicle frame assembly, a front suspension assembly and a rear suspension assembly, wherein the front suspension assembly and the rear suspension assembly are arranged on the vehicle frame assembly; the upper surface of the frame assembly is used for mounting a container; the front suspension assembly comprises a transversely-arranged plate spring arranged in the width direction of the frame, the two ends of the transversely-arranged plate spring are connected with the knuckle assemblies respectively, and the middle of the transversely-arranged plate spring is connected with the frame assembly. The rear suspension assembly comprises plate spring suspension assemblies arranged left and right at intervals, each plate spring suspension assembly comprises a plate spring set formed by stacking a plurality of plate springs, the two ends of each plate spring set are connected to the frame assembly, and the middle of each plate spring set is connected to the rear axle assembly. According to the chassis of the unmanned logistics vehicle, the front suspension assembly with the transverse plate spring structure and the rear suspension assembly with the plate spring suspension assembly structure are adopted, so that the chassis is high in bearing capacity, low in manufacturing cost and good in using effect.

Description

Technical Field

[0001] This utility model relates to the field of logistics transportation technology, and in particular to an unmanned logistics vehicle chassis. This utility model also relates to an unmanned logistics vehicle equipped with the aforementioned unmanned logistics vehicle chassis. Background Technology

[0002] The logistics industry is developing rapidly, with the number of express delivery orders increasing every year. The demand for manpower and vehicles is also gradually increasing. However, the increase in the number of delivery personnel is leading to a continuous rise in labor costs, exacerbating the contradiction between business needs and labor costs. Traditional logistics vehicles can no longer resolve this contradiction. To reduce labor costs, driverless logistics vehicles are gradually replacing traditional logistics transportation methods.

[0003] In related technologies, autonomous logistics vehicles include a chassis and a cargo box mounted on the chassis. The chassis integrates front and rear axle assemblies, steering systems, braking systems, power supply systems, and drive systems. However, the current autonomous logistics vehicle chassis have a relatively complex structural layout, high manufacturing costs, and their load-bearing capacity needs further improvement. Utility Model Content

[0004] In view of this, the present invention aims to propose an unmanned logistics vehicle chassis, which can improve the chassis's load-bearing capacity and reduce manufacturing costs.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] An unmanned logistics vehicle chassis includes a frame assembly, and a front suspension assembly and a rear suspension assembly mounted on the frame assembly;

[0007] The upper surface of the frame assembly is used to mount the cargo box;

[0008] The front suspension assembly includes a transverse leaf spring arranged along the width of the vehicle frame. Both ends of the transverse leaf spring are connected to the steering knuckle assembly, and the middle part of the transverse leaf spring is connected to the vehicle frame assembly.

[0009] The rear suspension assembly includes leaf spring suspension components arranged at intervals on the left and right sides. Each leaf spring suspension component includes a leaf spring group consisting of multiple leaf springs stacked together. The two ends of the leaf spring group are connected to the vehicle frame assembly, and the middle part of the leaf spring group is connected to the rear axle assembly.

[0010] Furthermore, the transverse leaf spring is a single spring steel plate arranged along the width direction of the vehicle; in the width direction of the vehicle, the middle part of the spring steel plate arches upward along the height direction of the vehicle and is connected to the frame assembly, and the thickness of the spring steel plate gradually decreases from the middle to the end.

[0011] Further, a front contact edge assembly located on the front side of the front suspension assembly and a rear contact edge assembly located on the rear side of the rear axle assembly are provided on the frame assembly; and / or, the upper surface of the frame assembly is a flat surface, and a positioning structure and a connecting structure are provided on the upper surface. The positioning structure and the connecting structure are diagonally distributed, and the positioning structure is used for positioning and cooperating with the cargo box, and the connecting structure is used for detachably connecting with the cargo box.

[0012] Further, a battery system is provided on the frame assembly, and the battery system is located between the front suspension assembly and the rear suspension assembly.

[0013] Further, the battery system includes a power battery pack connected to the frame assembly.

[0014] Further, the frame assembly is a frame structure and includes two first longitudinal beams arranged at intervals, two second longitudinal beams, at least one first cross beam connected between the two first longitudinal beams, and at least one second cross beam connected between the two second longitudinal beams; the distance between the two first longitudinal beams is less than the distance between the two second longitudinal beams, and the rear ends of the two first longitudinal beams are connected to the second cross beam near the front ends of the second longitudinal beams.

[0015] Further, connecting longitudinal beams are respectively provided below each of the second longitudinal beams. Each connecting longitudinal beam is connected to the corresponding second longitudinal beam through a vertical connecting beam, and a reinforcing cross beam is provided between the two connecting longitudinal beams; each of the second longitudinal beams, the vertical connecting beam, each of the connecting longitudinal beams and the reinforcing cross beam jointly enclose a receiving cavity for receiving the power battery pack; the housing of the power battery pack is connected to each of the connecting longitudinal beams and the reinforcing cross beam.

[0016] Further, there are two reinforcing cross beams corresponding to the front end and the rear end of the power battery pack; and / or, the cross section of the reinforcing cross beam is in a "channel" shape.

[0017] Further, a tire pressure monitoring device is further included. The tire pressure monitoring device includes a tire pressure receiver on the frame assembly and tire pressure sensors provided on each wheel at the bottom of the frame assembly.

[0018] Compared with the prior art, the present utility model has the following advantages:

[0019] The unmanned logistics vehicle chassis described in this utility model adopts a front suspension assembly with a transverse leaf spring structure and a rear suspension assembly with a leaf spring suspension component, namely an integral bridge leaf spring structure. By utilizing the structure of the front and rear suspension assemblies, the chassis has a strong load-bearing capacity. Moreover, its structure is simple, easy to arrange, and compact. Compared with the four-link non-independent suspension structure of the front suspension assembly, its manufacturing cost is lower and it has a better performance.

[0020] Furthermore, by employing a single spring steel plate arranged along the width of the vehicle for the transverse leaf spring, and by gradually decreasing the thickness of the spring steel plate from the middle to the ends, the use of a variable cross-section single spring steel plate offers high material utilization, excellent performance, and significantly improves the roll stiffness of the suspension, thereby ensuring the vehicle's roll performance during cornering. The inclusion of front and rear contact edge assemblies on the frame assembly facilitates obstacle or pedestrian detection, enabling pedestrian protection and emergency stop functions for unmanned logistics vehicles. The flat upper surface of the frame assembly ensures the cargo box is unaffected by chassis factors, enhancing the vehicle's platform design and increasing cargo box space utilization.

[0021] Secondly, the battery system on the chassis assembly is positioned between the front and rear suspension assemblies, allowing the longitudinal beams of the power battery to be evenly distributed across the front and rear axles. This results in a more balanced load distribution between the front and rear axles and facilitates the placement of related components of the power battery system, as well as matching with exterior mounting points. Using a power battery pack enables on-board charging, eliminating the need for removing and replacing the power battery.

[0022] Furthermore, the vehicle frame assembly adopts a frame structure, and the distance between the two first longitudinal beams is smaller than the distance between the two second longitudinal beams, which is beneficial for the arrangement of the front suspension assembly and is simple in structure and easy to manufacture. Vertical connecting beams and connecting longitudinal beams are set below each second longitudinal beam, and together with reinforcing crossbeams, they form the housing cavity for the power battery pack. This structure is simple, easy to manufacture, and has high structural strength.

[0023] At the same time, the battery pack casing is connected to all connecting longitudinal beams and reinforcing crossbeams. This allows the reinforcing crossbeams to not only improve the structural strength of the vehicle frame assembly but also enhance the reliability of the connection between the battery pack and the vehicle frame assembly. Additionally, the reinforcing crossbeams can serve as force transmission channels in the event of a side collision, helping to disperse the impact force and thus providing a certain degree of protection for the battery pack.

[0024] Furthermore, the reinforcement beams are arranged in two spaced-apart configurations at the front and rear ends of the corresponding power battery pack. This further improves the reliability of the connection between the power battery pack and the vehicle frame assembly, enhances the structural strength of the vehicle frame assembly, and also helps to disperse collision forces, protecting the power battery pack. The cross-section of the reinforcement beams is designed in a "U" shape, which is simple in structure, easy to manufacture, and also helps to improve the reliability of the connection between the reinforcement beams and the connecting longitudinal beams. The installation of tire pressure monitoring devices facilitates real-time monitoring of the tire pressure of each vehicle, allowing for timely understanding of the tire pressure status, thereby improving the driving safety of autonomous logistics vehicles.

[0025] Another objective of this utility model is to provide an unmanned logistics vehicle, which is equipped with the unmanned logistics vehicle chassis described above.

[0026] The unmanned logistics vehicle of this utility model adopts the unmanned logistics vehicle chassis described above, which has the characteristics of simple structure, easy layout and compact layout. It not only makes the chassis have strong load-bearing capacity, but also has low manufacturing cost and good performance. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a first-view structural schematic diagram of the unmanned logistics vehicle chassis described in an embodiment of the present invention;

[0029] Figure 2 This is a second-view structural schematic diagram of the unmanned logistics vehicle chassis described in an embodiment of the present invention;

[0030] Figure 3 This is a third-view structural diagram of the unmanned logistics vehicle chassis described in an embodiment of the present utility model.

[0031] Figure 4 This is a first-view structural schematic diagram of the transverse leaf spring described in an embodiment of the present invention;

[0032] Figure 5 This is a second-view structural schematic diagram of the transverse leaf spring described in an embodiment of the present invention;

[0033] Figure 6 This is a partial structural schematic diagram of the frame assembly described in an embodiment of the present utility model;

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Frame assembly; 2. Battery pack; 3. Tire pressure monitoring system; 5. IBS; 61. Positioning pin; 62. Connecting hole; 7. Wheel speed processor; 8. Front contact assembly; 9. Fuse box; 10. Body control unit; 11. Charging port; 12. Motor controller; 13. Rear contact assembly; 14. Rear suspension assembly; 15. On-board charger integrated DC / DC converter; 16. Battery compartment; 17. Steering system; 18. Front suspension assembly; 19. Battery; 20. Vehicle controller; 21. Drive motor; 22. EPB;

[0036] 100. Front wheel; 200. Rear wheel; 101. First longitudinal beam; 102. Second longitudinal beam; 103. First crossbeam; 104. Second crossbeam; 105. Vertical connecting beam; 106. Connecting longitudinal beam; 107. Reinforcing crossbeam; 181. Spring steel plate; 1811. Middle section; 1812. Connecting section; 1813. End section; 18101. First connecting hole; 18102. Second connecting hole. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0038] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0040] Additionally, it should be noted that the directional terms used in the description of this utility model, such as "up," "down," "left," "right," "front," and "rear," are defined based on the vehicle's vertical, horizontal, and longitudinal directions. Specifically, the vehicle's vertical direction is also its height direction (Z-direction), its longitudinal direction is also its length direction (X-direction), and its horizontal direction is also its width direction (Y-direction).

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] This embodiment relates to an unmanned logistics vehicle chassis, which is beneficial for improving the load-bearing capacity of the chassis and reducing manufacturing costs.

[0044] In terms of overall structure, such as Figures 1 to 3 As shown, the unmanned logistics vehicle chassis of this embodiment includes a frame assembly 1, and a front suspension assembly 18 and a rear suspension assembly 14 mounted on the frame assembly 1. The upper surface of the frame assembly 1 is used to mount the cargo box. The front suspension assembly 18 includes transverse leaf springs arranged along the width direction of the frame. Both ends of the transverse leaf springs are connected to steering knuckle assemblies, and the middle portion of the transverse leaf springs is connected to the frame assembly 1. The rear suspension assembly 14 includes leaf spring suspension assemblies arranged at intervals on the left and right sides. Each leaf spring suspension assembly includes a leaf spring group consisting of multiple leaf springs stacked together. Both ends of the leaf spring group are connected to the frame assembly 1, and the middle portion of the leaf spring group is connected to the rear axle assembly.

[0045] At this point, in the above structure, the front suspension assembly 18 adopts a transverse leaf spring structure, and the rear suspension assembly 14 adopts a leaf spring suspension component, namely an integral bridge leaf spring structure. This makes the chassis have a strong load-bearing capacity, and its structure is simple, easy to arrange and compact. Compared with the front suspension assembly 18 adopting a four-link non-independent suspension structure, its manufacturing cost is lower.

[0046] Based on the above overview, for a more detailed explanation, please refer to [link / reference needed]. Figures 1 to 3 As shown, the unmanned logistics vehicle chassis of this embodiment includes a frame assembly 1, and a front suspension assembly 18, a rear suspension assembly 14, a rear axle assembly, a contact edge assembly, a tire pressure monitoring device, a battery system, a steering system 17, a braking system, and a drive system mounted on the frame assembly 1. The upper surface of the frame assembly 1 is used to mount a cargo box (not shown in the figure). As a preferred embodiment, the upper surface of the frame assembly 1 is flat, which ensures that the cargo box is not affected by chassis factors, strengthens the platform nature of the vehicle, and increases the space utilization of the cargo box. Furthermore, as a preferred embodiment, this embodiment has a positioning structure and a connecting structure on the upper surface, which are diagonally distributed. The positioning structure is used to position and cooperate with the cargo box, and the connecting structure is used for detachable connection with the cargo box.

[0047] Specifically, the positioning structure includes a positioning pin 61 on the upper surface, and the connection structure includes a connection hole 62 on the upper surface. In practice, the positioning hole at the bottom of the cargo box is positioned and engaged with the positioning pin 61, and is screwed together with the bottom of the cargo box by a connector such as a bolt or screw passing through the connection hole 62, so that the cargo box is well fixed on the chassis.

[0048] This embodiment, through its positioning and connection structures, ensures the installation accuracy of the cargo box pair, thus guaranteeing the accuracy of the autonomous driving sensors. It is worth noting that the positions of the positioning pins 61 and the positioning holes can be adaptively adjusted according to the size requirements of the cargo box or express delivery locker, as well as the performance requirements of the entire vehicle, thereby maximizing the platform's versatility.

[0049] In this embodiment, the transverse leaf spring in the front suspension assembly 18 is, as a preferred implementation, such as... Figures 3 to 5 As shown, the transverse leaf spring is a single spring steel plate 181 arranged along the width direction of the vehicle. Furthermore, in the width direction, the middle of the spring steel plate 181 arches upwards along the height direction of the vehicle and connects to the frame assembly 1. The thickness of the spring steel plate 181 gradually decreases from the middle to the end. In this case, the transverse leaf spring in the front suspension assembly 18 uses a single spring steel plate 181, and the thickness of the spring steel plate 181 gradually decreases from the middle to the end. That is, the front suspension assembly 18 uses a single-piece spring steel plate 181 with a variable cross-section. This has high material utilization, excellent performance, and can significantly improve the roll stiffness of the suspension, thereby helping to ensure the roll performance of the entire vehicle during cornering.

[0050] For details, please refer to Figure 4 and Figure 5 The spring steel plate 181, projected in the vehicle width direction, has a straight middle section 181131, a connecting section 181232 connecting both ends of the middle section 181131 and sloping downwards in the vehicle height direction, and an end section 181333 connected to the connecting section 181232. The end section 181333 slopes upwards in the vehicle height direction, thus better matching the camber angle of the left and right wheels.

[0051] In this embodiment, the thickness d1 of the middle section 181131 is greater than the thickness d2 of the connecting section 181232, and the thickness d2 of the connecting section 181232 is greater than the thickness d3 of the end section 181333. The thickness d2 of the connecting section 181232 gradually decreases along the direction from the middle to the end. Through the design of the shape and variable cross-section of the spring steel plate 1813, it not only has good structural strength but also high material utilization and excellent performance.

[0052] In addition, the spring steel plate 181 has first connecting holes 18101 at both ends and a second connecting hole 18102 in the middle. The two ends of the spring steel plate 181 are respectively connected to the left and right steering knuckle assemblies through connectors passing through the corresponding first connecting holes 18101, and the middle part of the spring steel plate 181 is connected to the frame assembly 1 through a connector passing through the second connecting hole 18102. In order to improve the reliability of the connection of the spring steel plate 181 to the frame assembly 1, a leaf spring seat is provided in the middle part of the spring steel plate 181. The leaf spring seat is used to connect to the frame assembly 1. In a specific implementation, for example, the middle part of the spring steel plate 181 is accommodated in the receiving groove on the leaf spring seat, and then the leaf spring seat is screwed together with the frame assembly 1 through a connector, thereby fixing the middle part of the spring steel plate 181 to the frame assembly 1.

[0053] The rear suspension assembly 14 of this embodiment includes leaf spring suspension assemblies arranged at intervals on the left and right sides. Each leaf spring suspension assembly includes a leaf spring group consisting of multiple leaf springs stacked together. The two ends of the leaf spring group are connected to the frame assembly 1, and the middle part of the leaf spring group is connected to the rear axle assembly. That is, the rear suspension assembly 14 adopts a solid axle leaf spring structure non-independent suspension. In specific implementation, the front end of the leaf spring group is located close to the receiving cavity of the power battery pack 2 described below, the rear end of the leaf spring group is connected to the second longitudinal beam 102 in the frame assembly 1 through a bracket, and the middle part is connected to the rear axle assembly through a U-bolt.

[0054] The rear axle assembly integrates a reducer, which is directly connected to the drive motor 21. This saves on mounting brackets and drive shafts, resulting in a compact structure and high transmission efficiency. Furthermore, the rear suspension assembly 14 with its leaf spring suspension component structure reduces the overall vehicle cost while ensuring overall vehicle performance.

[0055] In a preferred embodiment, the vehicle frame assembly 1 includes a front contact edge assembly 8 located in front of the front suspension assembly 18 and a rear contact edge assembly 13 located behind the rear axle assembly. Both the front contact edge assembly 8 and the rear contact edge assembly 13 include sensors. These sensors are used to collect signals for pedestrian protection and emergency stop upon impact, which facilitates the detection of obstacles or people and helps ensure the safe operation of the unmanned logistics vehicle.

[0056] In this embodiment, the battery system is located between the front suspension assembly 18 and the rear suspension assembly 14. This distributes the power battery's longitudinal beams evenly across the front and rear axles, resulting in a more balanced load distribution between the front and rear axles. It also facilitates the arrangement of related components of the power battery system and the matching of exterior trim mounting points. The steering system 17 and braking system are located at the front of the vehicle frame.

[0057] In a preferred embodiment, the battery system of this example includes a power battery pack 2 connected to the vehicle frame assembly 1. In this case, the battery pack mounted on the vehicle frame assembly 1 can be charged throughout the vehicle, eliminating the need for removing and replacing the power battery.

[0058] Combination Figures 1 to 3 As shown, the frame assembly 1 in this embodiment is a frame structure, including two first longitudinal beams 101 and two second longitudinal beams 102 arranged at intervals, at least one first crossbeam 103 connected between the two first longitudinal beams 101, and at least one second crossbeam 104 connected between the two second longitudinal beams 102. The two first longitudinal beams 101 are specifically located in front of the two second longitudinal beams 102, the distance between the two first longitudinal beams 101 is smaller than the distance between the two second longitudinal beams 102, and the rear ends of the two first longitudinal beams 101 are connected to the second crossbeam 104 near the front end of the second longitudinal beams 102. In this configuration, the front and rear arrangement of the first longitudinal beams 101 and second longitudinal beams 102, with the distance between the two first longitudinal beams 101 being smaller than the distance between the two second longitudinal beams 102, facilitates the arrangement of the front suspension assembly 18 and results in a simple structure that is easy to manufacture.

[0059] It should be noted that, in this embodiment, the first longitudinal beam 101 and the second longitudinal beam 102 in the frame assembly 1 are preferably made of square finished steel tubes. This utilizes the mature and reliable characteristics of square finished steel tubes as raw materials, which can ensure the vehicle's precision and rigidity requirements, while also eliminating the need for mold making. This not only reduces the overall vehicle manufacturing cost but also shortens the overall vehicle manufacturing cycle.

[0060] As a preferred embodiment, in this embodiment, such as Figure 6 As shown, each of the second longitudinal beams 102 is provided with a connecting longitudinal beam 106 below it. Each connecting longitudinal beam 106 is connected to the corresponding second longitudinal beam 102 via a vertical connecting beam 105. Furthermore, a reinforcing crossbeam 107 is provided between two connecting longitudinal beams 106. The second longitudinal beams 102, the vertical connecting beams 105, the connecting longitudinal beams 106, and the reinforcing crossbeam 107 together form a rectangular frame structure. The interior of this frame structure constitutes the accommodating cavity for the power battery pack 2. The shell of the power battery pack 2 is connected to each connecting longitudinal beam 106 and the reinforcing crossbeam 107.

[0061] At this point, in the above structure, the housing of the power battery pack 2 is connected to each of the connecting longitudinal beams 106 and the reinforcing crossbeams 107. In this way, the reinforcing crossbeams 107 can not only improve the structural strength of the frame assembly 1, but also improve the reliability of the connection between the power battery pack 2 and the frame assembly 1. At the same time, the reinforcing crossbeams 107 can also serve as a force transmission channel when the vehicle is involved in a side collision, which helps to disperse the collision force and thus can protect the power battery pack 2 to a certain extent.

[0062] Specifically, referring to Figure 6 As shown, in this embodiment, there are two reinforcing crossbeams 107 corresponding to the front end and the rear end of the power battery pack 2. This can further improve the connection reliability between the power battery pack 2 and the vehicle frame assembly 1, further enhance the structural strength of the vehicle frame assembly 1. At the same time, it can also further facilitate the dispersion of collision forces and protect the power battery pack 2.

[0063] Moreover, as a preferred embodiment, in this embodiment, the cross-section of each reinforcing crossbeam 107 is in a "C" shape. This setting has the advantages of simple structure, being conducive to processing and preparation, and also being conducive to improving the connection reliability between the reinforcing crossbeam 107 and each connecting longitudinal beam 106. At the same time, by utilizing the structural characteristics of the "C" shape, the structural strength of the vehicle frame assembly 1 can also be enhanced.

[0064] During specific implementation, both ends of each reinforcing crossbeam 107 are respectively welded to the connecting longitudinal beams 106 on both sides, and the side parts of each reinforcing crossbeam 107 and the connecting longitudinal beams 106 on both sides are in the same plane. The power battery pack 2 is supported on each connecting longitudinal beam 106 and each reinforcing crossbeam 107. And the side connecting edges on the shell of the power battery pack 2 are respectively screwed to the connecting longitudinal beams 106 on both sides, and the front and rear connecting edges on the shell of the power battery pack 2 are respectively screwed to the front and rear two reinforcing crossbeams 107.

[0065] At this time, by using the two arranged reinforcing crossbeams 107, on the one hand, the connection reliability between the battery pack and the vehicle frame assembly 1 can be improved, on the other hand, the overall structural strength of the vehicle frame assembly 1 can be enhanced. At the same time, the two crossbeams can also serve as a force transmission channel during the side collision of the driverless logistics vehicle, and play a role in protecting the power battery pack 2 by dispersing the collision force.

[0066] As a preferred embodiment, the chassis of the driverless logistics vehicle in this embodiment further includes a tire pressure monitoring device. The tire pressure monitoring device includes a tire pressure receiver 3 on the vehicle frame assembly 1 and tire pressure sensors. The tire pressure sensors are arranged on each wheel at the bottom of the vehicle frame assembly 1. Among them, the tire pressure receiver 3 is arranged on the second crossbeam 104 near the front end of the second longitudinal beam 102 and is located in the accommodating cavity, and the tire pressure receiver 3 is wirelessly connected to the vehicle controller 20. At this time, the setting of the tire pressure monitoring device is conducive to realizing the real-time monitoring of the tire pressure of each vehicle tire, timely understanding the tire pressure state, and thus is conducive to improving the driving safety of the driverless logistics vehicle.

[0067] Furthermore, in this embodiment, the steering system 17 employs an electric power steering (EPS) system for electronically controlled steering. The steering motor directly drives the steering knuckle to rotate, achieving 100° rotation of the front wheels and thus steering the vehicle. This structure is simple and saves space. The steering gear is connected to the chassis assembly 1, ensuring reliable and safe steering operation of the unmanned logistics vehicle chassis. The steering system 17 can receive signals from the entire vehicle to control steering, achieving unmanned steering.

[0068] In this embodiment, a front brake is provided on the front wheel 100 at the bottom of the frame assembly 1, and a rear brake is provided on the rear wheel 200. The braking system includes a service braking system and an emergency braking system. The service braking system includes an IBS5 (Intelligent Battery Sensor), which is electrically connected to the front brake and is mounted on the front side of the battery system. The emergency braking system includes an EPB22 (Electrical Park Brake), which is electrically connected to the rear brake and is mounted on the rear side of the battery system.

[0069] The service braking system uses IBS5 as its power source, enabling unmanned braking. Braking force is transmitted to the front brakes hydraulically, thus achieving braking. The brake fluid reservoir is integrated with the IBS5, reducing the risk of brake fluid leakage. Both the emergency braking and parking brake systems use EPB22 brakes, with the EPB22 actuator located on the rear brakes, providing braking redundancy and improving the safety of the unmanned logistics vehicle.

[0070] In some specific embodiments, the low-voltage module in the battery system includes a battery 19, a fuse box 9, a vehicle control unit (VCU), a body control module (BCM), a wheel speed processor 7, and a tire pressure receiver 3. In the width direction of the autonomous logistics vehicle, the battery 19, fuse box 9, vehicle control unit (VCU), and body control module (BCM) are all located on the right side of the frame assembly 11, and are located within the battery compartment 16, with the wheel speed processor 7 located at the front of the battery compartment 16.

[0071] In this embodiment, the drive system includes a motor controller 12 and an on-board charger integrated DC / DC converter 15. The motor controller 12 and the on-board charger integrated DC / DC converter 15 are located at the rear of the battery compartment 16 and at the front of the rear axle assembly. The EPB 22 is located at the rear of the rear axle assembly. This arrangement allows for the separation of the high-voltage and low-voltage systems, thereby improving vehicle safety and handling. The motor controller 12, the on-board charger integrated DC / DC converter 15, and the charging port 11 of the power battery pack 2 are located between the power battery pack 2 and the drive motor 21. This optimizes the length of the high-voltage wiring harness, ensures the compactness of the high-voltage system, and reduces the impact of EMC (Electromagnetic Compatibility) on various vehicle components.

[0072] It is worth mentioning that the specific structures of the steering system 17, braking system and drive system in this embodiment can refer to mature structures in the prior art.

[0073] The unmanned material vehicle chassis of this embodiment has the characteristics of strong load-bearing capacity, simple structure and compact layout. Compared with the front suspension assembly 18 which adopts a four-link non-independent suspension structure, it also has the advantage of lower manufacturing cost.

[0074] Example 2

[0075] This embodiment relates to an unmanned logistics vehicle, which is equipped with the unmanned logistics vehicle chassis described in Embodiment 1.

[0076] The unmanned logistics vehicle of this embodiment adopts the unmanned logistics vehicle chassis of Embodiment 1, which not only makes the chassis have strong load-bearing capacity and low manufacturing cost, but also has the characteristics of simple structure, easy layout and compact arrangement. At the same time, the unmanned material vehicle of this embodiment can be adapted to long-distance urban distribution scenarios, such as urban open roads (motor roads and non-motor roads), semi-closed and closed park scenarios, and has good usage effect.

[0077] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An unmanned logistics vehicle chassis, characterized in that: It includes a frame assembly (1), and a front suspension assembly (18) and a rear suspension assembly (14) disposed on the frame assembly (1). The upper surface of the frame assembly (1) is used to mount the cargo box; The front suspension assembly (18) includes a transverse leaf spring arranged along the width direction of the frame, with both ends of the transverse leaf spring connected to the steering knuckle assembly and the middle part of the transverse leaf spring connected to the frame assembly (1). The rear suspension assembly (14) includes leaf spring suspension components arranged at intervals on the left and right sides. Each leaf spring suspension component includes a leaf spring group consisting of multiple leaf springs stacked together. The two ends of the leaf spring group are connected to the frame assembly (1), and the middle part of the leaf spring group is connected to the rear axle assembly.

2. The unmanned logistics vehicle chassis according to claim 1, characterized in that: The transverse leaf spring is a single spring steel plate (181) arranged along the width direction of the vehicle. In the vehicle width direction, the middle part of the spring steel plate (181) arches upward along the vehicle height direction and is connected to the frame assembly (1), and the thickness of the spring steel plate (181) is gradually reduced from the middle to the end.

3. The unmanned logistics vehicle chassis according to claim 1, characterized in that: The frame assembly (1) is provided with a front contact edge assembly (8) located in front of the front suspension assembly (18) and a rear contact edge assembly (13) located behind the rear axle assembly; and / or, The upper surface of the frame assembly (1) is a plane, and a positioning structure and a connecting structure are provided on the upper surface. The positioning structure and the connecting structure are diagonally distributed, and the positioning structure is used to position and cooperate with the cargo box, and the connecting structure is used to detachably connect with the cargo box.

4. The unmanned logistics vehicle chassis according to claim 1, characterized in that: The frame assembly (1) is equipped with a battery system located between the front suspension assembly (18) and the rear suspension assembly (14).

5. The unmanned logistics vehicle chassis according to claim 4, characterized in that: The battery system includes a power battery pack (2) connected to the frame assembly (1).

6. The unmanned logistics vehicle chassis according to claim 5, characterized in that: The frame assembly (1) is a frame structure and includes two first longitudinal beams (101) and two second longitudinal beams (102) arranged at intervals, at least one first crossbeam (103) connected between the two first longitudinal beams (101), and at least one second crossbeam (104) connected between the two second longitudinal beams (102). The distance between the two first longitudinal beams (101) is less than the distance between the two second longitudinal beams (102), and the rear ends of the two first longitudinal beams (101) are connected to the second crossbeam (104) near the front end of the second longitudinal beam (102).

7. The unmanned logistics vehicle chassis according to claim 6, characterized in that: A connecting longitudinal beam (106) is provided below each of the second longitudinal beams (102). Each of the connecting longitudinal beams (106) is connected to the corresponding second longitudinal beam (102) through a vertical connecting beam (105), and a strengthening cross beam (107) is provided between the two connecting longitudinal beams (106). The second longitudinal beams (102), vertical connecting beams (105), connecting longitudinal beams (106) and the strengthening cross beam (107) together enclose a receiving cavity for receiving the power battery pack (2). The housing of the power battery pack (2) is connected to each of the connecting longitudinal beams (106) and the strengthening cross beam (107).

8. The chassis of an unmanned logistics vehicle according to claim 7, wherein: There are two strengthening cross beams (107) corresponding to the front end and the rear end of the power battery pack (2); and / or The cross section of the strengthening cross beam (107) is in a "U" shape.

9. The chassis of an unmanned logistics vehicle according to any one of claims 1 to 8, wherein: It further includes a tire pressure monitoring device. The tire pressure monitoring device includes a tire pressure receiver (3) on the vehicle frame assembly (1) and tire pressure sensors provided on each wheel at the bottom of the vehicle frame assembly (1).

10. An unmanned logistics vehicle, wherein: The unmanned logistics vehicle is provided with the chassis of an unmanned logistics vehicle according to any one of claims 1 to 9.

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