Chassis system and vehicle with same

Abstract

The invention relates to the field of vehicles, in particular to a chassis system and a vehicle with the chassis system. A rear axle assembly, a spare tire assembly and a charging system are arranged on the frame; the rear axle assembly comprises a rear axle unit and a driving motor connected to the rear axle unit. The charging system comprises an electric control system, a battery pack and a charging port assembly. The electric control system is arranged in an area between the spare tire assembly and the rear axle assembly; the charging port assembly and the battery packs, the electric control system and the battery packs, and the electric control system and the driving motor are connected through wire harness units. Through the integrated design of the electric control system, the battery pack and the charging port assembly, the length of the wire harness unit can be reduced, wire harness damage during charging or using is reduced, and the charging efficiency is improved; in addition, the electric control system is arranged in the area between the spare tire assembly and the rear axle assembly; through the arrangement, the length of a wire harness between the electric control system and the driving motor is reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically to a chassis system and a vehicle having the chassis system. Background Technology

[0002] With the rapid development of the new energy vehicle industry, people have placed higher demands on vehicle range, charging efficiency, safety performance, and ease of maintenance. As the core carrier of a vehicle, the rationality of the chassis system's layout directly affects the overall performance of the vehicle.

[0003] In existing electric vehicle chassis designs, the layout of key components such as the electronic control system, drive motor, battery pack, and charging system is often quite dispersed.

[0004] This decentralized layout has many inherent drawbacks:

[0005] First, from a safety perspective, many existing designs fail to provide effective collision protection for high-voltage electronic control systems. These systems may be directly exposed at the rear or side of the vehicle, making them highly susceptible to damage in rear-end collisions or side impacts, potentially leading to high-voltage leaks or even vehicle malfunction, posing a serious safety hazard.

[0006] Secondly, from an energy efficiency perspective, the dispersed layout of components results in excessively long high-voltage wiring harnesses (such as motor drive harnesses and charging harnesses) connecting these components. Increased harness length directly leads to increased resistance, causing significant power transmission losses. This not only reduces drive efficiency and affects driving range but also slows down charging speed and reduces charging efficiency. Especially for high-current fast charging circuits, excessively long harness paths bring even greater energy losses and thermal management challenges.

[0007] From the perspective of structural layout and maintenance, the existing chassis layout lacks overall integration and has low space utilization.

[0008] Meanwhile, the access ports for key components such as the electronic control system are often designed on the top or inside. When maintenance or repair is required, a large number of body panels or other components usually need to be disassembled, which is cumbersome, time-consuming and labor-intensive, greatly increasing the maintenance costs and time in the later stage.

[0009] Furthermore, existing wiring harness management methods are rather crude, failing to fully utilize the vehicle frame structure for effective fixation and guidance. Long wiring harnesses are prone to interference and wear with surrounding components in the vibration environment of vehicle operation, posing a short circuit risk, and their messy layout is also detrimental to electromagnetic compatibility.

[0010] Therefore, there is an urgent need in this field for a new chassis system design that can fundamentally solve the above problems and achieve a chassis layout that is highly safe, efficient, highly integrated, and easy to maintain.

[0011] The existing patent CN 117818756 A - A gasoline range-extended electric light truck chassis and automobile does not explicitly disclose the technical content that solves the above-mentioned technical problems.

[0012] Therefore, in order to improve or solve at least one of the above technical problems, it is necessary to optimize the design of the existing vehicle chassis system. Summary of the Invention

[0013] The purpose of this invention is to provide a chassis system that can reduce charging energy consumption.

[0014] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0015] A chassis system includes a frame; a rear axle assembly, a spare tire assembly, and a charging system are mounted on the frame;

[0016] The rear axle assembly includes a rear axle unit and a drive motor connected to the rear axle unit;

[0017] The charging system includes an electronic control system, a battery pack, and a charging port assembly; the electronic control system is located in the area between the spare tire assembly and the rear axle assembly.

[0018] The charging port assembly is connected to the battery pack, the electronic control system is connected to the battery pack, and the electronic control system is connected to the drive motor via a wiring harness unit.

[0019] The electronic control system, battery pack, and charging port assembly are all located near the rear axle assembly; the charging port assembly is located on the outer side of the vehicle frame and near the electronic control system; the inspection port in the electronic control system is arranged downwards.

[0020] The charging system includes a support unit, which includes a lower support unit; the lower support unit includes two parallel lower mounting brackets spaced apart; each lower mounting bracket is connected at both ends to two longitudinal beams in the vehicle frame.

[0021] The support unit includes an upper support unit, which includes two parallel upper mounting brackets spaced apart. Each upper mounting bracket is connected at both ends to two longitudinal beams in the vehicle frame.

[0022] The upper support unit is located above the drive motor.

[0023] The frame includes two spaced longitudinal beams; the two longitudinal beams are connected by multiple crossbeams.

[0024] The longitudinal beam includes a web, an upper flange, and a lower flange; the upper flange and the lower flange are distributed on opposite sides of the web; the vertical cross-section of the longitudinal beam is shaped like the Chinese character "[";

[0025] The upper support unit overlaps the upper flange of the longitudinal beam;

[0026] The lower support unit is connected to the lower flange of the longitudinal beam.

[0027] The wiring harness unit includes a fast charging harness, a slow charging harness, an electronic control power supply harness, and a motor power supply harness; the charging port assembly is connected to the battery pack via the fast charging harness;

[0028] The charging port assembly is connected to the electronic control system via a slow charging harness;

[0029] The battery pack is connected to the electronic control system via an electronic control power supply harness;

[0030] The electronic control system is connected to the drive motor via a motor power supply harness;

[0031] The fast charging harness, the electronic control power supply harness, and the motor power supply harness are connected to the upper support unit.

[0032] The fast charging harness, the electronic control power supply harness, and the motor power supply harness are all connected to the upper support unit; the fast charging harness crosses the longitudinal beam of the vehicle frame and connects to the upper support unit.

[0033] The power supply harness and the fast charging harness are connected to the vehicle frame via a limiting bracket; the limiting bracket includes a U-shaped frame; the U-shaped frame is provided with an inclined mounting plate; the inclined mounting plate is arranged at an angle; and the inclined mounting plate is provided with a waist-shaped groove.

[0034] A vehicle including the chassis system.

[0035] The advantages of this invention are:

[0036] This invention discloses a chassis system and a vehicle having the chassis system.

[0037] This invention, through the integrated design of the electronic control system, battery pack, and charging port assembly, can reduce the length of the wiring harness unit, reduce damage to the wiring harness during charging or use, and improve charging efficiency.

[0038] In addition, in this invention, the electronic control system is located in the area between the spare tire assembly and the rear axle assembly; this arrangement reduces the length of the wiring harness between the electronic control system and the drive motor.

[0039] In this invention, the inspection port of the electronic control system faces downwards to meet the needs of later maintenance without the need for disassembly and maintenance.

[0040] The electronic control system of this invention is positioned in front of the spare tire to avoid impacting the safety of the multiple electronic control systems in the event of a rear vehicle collision. The electronic control system is positioned between two longitudinal beams to avoid impacting the safety of the electronic control system in the event of a side collision.

[0041] Placing the charging port assembly close to the electronic control system can also reduce the length of the charging cable, thereby reducing cable loss during charging and improving charging efficiency. Attached Figure Description

[0042] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0043] Figure 1 This is an isometric view of the first perspective of the present invention.

[0044] Figure 2 This is a top view of the present invention.

[0045] Figure 3 This is a partial enlarged view of the limiting bracket in this invention.

[0046] The markings in the above figures are all:

[0047] 1. Chassis, 2. Electronic control system, 3. Rear axle unit, 4. Drive motor, 5. Spare tire assembly, 6. Charging port assembly. Detailed Implementation

[0048] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0049] A chassis system includes a frame 1; a rear axle assembly, a spare tire assembly 5, and a charging system are mounted on the frame 1; the rear axle assembly includes a rear axle unit 3 and a drive motor 4 connected to the rear axle unit 3; the charging system includes an electronic control system 2, a battery pack 11-1, and a charging port assembly 6; the electronic control system 2 is located in the area between the spare tire assembly 5 and the rear axle assembly; the charging port assembly 6 is connected to the battery pack 11-1, the electronic control system 2 is connected to the battery pack 11-1, and the electronic control system 2 is connected to the drive motor 4 via wiring harnesses. The units are connected; the electronic control system 2 of this invention is located close to the drive motor 4 on the rear axle, which minimizes the length of the high-current motor power supply harness 9 connecting them; this reduces the power loss caused by cable resistance and improves the vehicle's power efficiency and range; the charging port assembly 6 is located close to the electronic control system 2, which shortens the slow charging harness 93 (connecting the charging port 62 to the electronic control system 2) and the electronic control power supply harness 91 (connecting the electronic control system 2 to the battery pack 11-1); this reduces energy loss during charging and improves charging efficiency.

[0050] The charging port assembly 6 is directly connected to the battery pack 11-1 via a wiring harness, which is typically the path designed for fast charging harness 92. The fast charging current is directly sent to the battery pack 11-1 without passing through the electronic control system 2, making the path more direct and meeting the requirements of high current and low loss for fast charging.

[0051] The spare tire-electronic control-rear axle longitudinal beam 11 protective structure of this invention greatly reduces the risk of damage to the core electronic control system 2 in a rear-end collision.

[0052] The electronic control system 2 is arranged between the left and right longitudinal beams 11 of the frame 1; the high-strength longitudinal beam 11 structure is used as a "collision beam" to effectively avoid the direct impact of side collisions on the electronic control system 2.

[0053] This invention considers the layout of the electronic control system 2, the charging system and the drive rear axle as a whole, which reflects a high degree of system integration, reduces the dispersed layout of parts, and is conducive to the lightweighting and modular production of the whole vehicle.

[0054] Furthermore, in this invention, the electronic control system 2, battery pack 11-1, and charging port assembly 6 are all arranged close to the rear axle assembly; the charging port assembly 6 is arranged on the outer side of the frame 1 and close to the electronic control system 2; the inspection port in the electronic control system 2 is arranged downwards; based on the above design, the components are concentrated close to the rear axle assembly; the above arrangement can achieve the shortest energy transmission path and improve efficiency.

[0055] The electronic control system 2 serves as the "command center" for driving electric power, the battery pack 11-1 serves as the "energy reservoir," and the drive motor 4 serves as the "actuator." The three are centrally located near the rear axle, which minimizes the length of the high-power motor power supply harness 9 and the electronic control power supply harness 91 connecting them. This significantly reduces energy loss caused by cable resistance, directly improving the vehicle's driving efficiency and driving range. The shorter harnesses also mean lower inductance and better electromagnetic compatibility, which helps the system operate stably. At the same time, the centralized layout also facilitates unified thermal management of high-voltage components.

[0056] The charging port assembly 6 is located on the outside of the frame 1 and close to the electronic control system 2. The charging port 62 is close to the electronic control system 2, so that the slow charging harness 93 (AC charging) connecting the two can be minimized. For slow charging, a shorter harness can reduce energy loss during transmission, improve charging efficiency, and ensure that more grid power is charged into the battery. The short harness also means lower material costs, lighter weight, and simpler assembly process.

[0057] The access panel of the electronic control system 2 is arranged downwards. Traditionally, the access panel is arranged upwards or inwards, which means that the upper body panels need to be removed during maintenance, which is time-consuming, labor-intensive and costly. The downward-facing access panel allows maintenance personnel to directly inspect, diagnose or replace modules from under the chassis after the vehicle is lifted, which greatly simplifies the maintenance process.

[0058] Furthermore, the charging system in this invention includes a support unit, which includes a lower support unit 7; the lower support unit 7 includes two parallel lower mounting brackets 71 spaced apart; each lower mounting bracket 71 is connected at both ends to two longitudinal beams 11 in the frame 1; the support unit also includes an upper support unit 8, which includes two parallel upper mounting brackets 81 spaced apart, each upper mounting bracket 81 being connected at both ends to two longitudinal beams 11 in the frame 1; the support unit disclosed in this invention can essentially be used as a crossbeam unit of the frame 1, facilitating the construction of a robust load-bearing platform; in this invention, the ends of the upper mounting brackets 81 and the lower mounting brackets 71 are respectively fixed to the left and right longitudinal beams 11 of the frame 1, which is equivalent to building multiple "crossbeams" between the longitudinal beams 11. This design greatly enhances the structural rigidity and integrity of the rear of the frame 1, avoiding deformation of the frame 1 due to component weight or driving vibration.

[0059] In addition, both the upper support unit 8 and the lower support unit 7 of this invention are double support structures. This design provides standardized installation points for the electronic control system 2, battery pack 11-1, wiring harness, etc.

[0060] The components can be pre-assembled on the bracket to form a sub-assembly, and then hoisted onto the frame 1 as a whole, which greatly simplifies the production and assembly process and improves production efficiency.

[0061] In this invention, the upper support unit 8 is typically used to support and fix high-voltage wiring harnesses (such as fast charging wiring harness 92, motor power supply wiring harness 9) to isolate them from moving parts below (such as drive motor 4) and avoid interference and wear.

[0062] It may also provide mounting points for other accessories above the drive motor 4.

[0063] The lower support unit 7 is typically used to support heavy components such as the electronic control system 2.

[0064] In this invention, the lower mounting bracket 71 and the upper mounting bracket 81 are respectively connected to the two longitudinal beams 11, which can effectively transfer and distribute the vertical load of the load-bearing components and the impact force during driving to the two main longitudinal beams 11, thus avoiding stress concentration.

[0065] In the event of a collision, this robust frame, composed of longitudinal and transverse beams, can more effectively transfer and absorb collision energy, protecting the core components installed within it.

[0066] Furthermore, in this invention, the upper support unit 8 is located above the drive motor 4. This arrangement allows the motor power supply harness 9 to be longitudinally connected to the drive motor 4 from above the frame 1 during subsequent use, which facilitates the routing of the motor power supply harness 9. At the same time, the upper support unit 8 being located above the drive motor 4 ensures the strength and rigidity of the frame 1 above the drive motor 4.

[0067] Furthermore, in this invention, the frame 1 includes two spaced longitudinal beams 11; the two longitudinal beams 11 are connected by multiple crossbeams; each longitudinal beam 11 includes a web 111, an upper flange 111, and a lower flange 112; the upper flange 111 and the lower flange 112 are distributed on opposite sides of the web 111; the vertical cross section of the longitudinal beam 11 is U-shaped; the upper support unit 8 overlaps the upper flange 111 of the longitudinal beam 11; the lower support unit 7 is connected to the lower flange 112 of the longitudinal beam 11; the longitudinal beam 11 of this invention is a U-shaped beam, which can ensure the bending and torsional stiffness of the longitudinal beam 11.

[0068] The web 111 mainly bears shear stress, while the upper and lower flanges 112 mainly bear bending stress. This structure can effectively resist forces and moments from all directions, ensuring the robustness of the frame 1 base.

[0069] The upper support unit 8 overlaps the upper flange 111, which facilitates the installation and fixation of the upper support unit 8 on the frame 1.

[0070] In this invention, the lower support unit 7 is connected to the lower flange 112, which facilitates the installation of the lower support unit 7 on the frame 1.

[0071] In addition, the longitudinal beam 11 of the present invention has an upper flange 111 and a lower flange 112; during subsequent installation and connection, the upper flange 111 and the lower flange 112 can provide an installation reference for the upper support unit 8 and the lower support unit 7.

[0072] In this invention, the upper support unit 8 and the lower support unit 7 are staggered, and the upper support unit 8, the lower support unit 7 and the frame 1 are arranged in a triangle, which can ensure the structural strength of the rear axle area of ​​the frame 1.

[0073] Furthermore, in this invention, the wiring harness unit includes a fast charging harness 92, a slow charging harness 93, an electronic control power supply harness 91, and a motor power supply harness 9; the charging port assembly 6 is connected to the battery pack 11-1 via the fast charging harness 92; the charging port assembly 6 is connected to the electronic control system 2 via the slow charging harness 93; the battery pack 11-1 is connected to the electronic control system 2 via the electronic control power supply harness 91; the electronic control system 2 is connected to the drive motor 4 via the motor power supply harness 9; the fast charging harness 92, the electronic control power supply harness 91, and the motor power supply harness 9 are mounted on the upper support unit 8; the arrangement of the fast charging harness 92, the slow charging harness 93, the electronic control power supply harness 91, and the motor power supply harness 9 facilitates the connection and communication between the corresponding components.

[0074] In this invention, the fast charging harness 92, the electronic control power supply harness 91, and the motor power supply harness 9 are all attached to the upper support unit 8. Based on this arrangement, this invention facilitates the support height of the fast charging harness 92, the electronic control power supply harness 91, and the motor power supply harness 9, avoiding the influence of gravity that causes the harnesses to sag.

[0075] In addition, in this invention, the fast charging harness 92 passes over the longitudinal beam 11 of the frame 1 and overlaps the upper support unit 8. Here, the fast charging harness 92 passing over the longitudinal beam 11 of the frame 1 means that after the fast charging harness 92 is introduced into the frame 1 from the charging bracket 61 in the charging port assembly 6, the fast charging harness 92 passes under the longitudinal beam 11, then passes over the lower support unit 7, and finally overlaps the upper support unit 8. This design allows the longitudinal beam 11 and the upper support unit 8 to cooperate with each other, so as to achieve the tensioning and fixing of the fast charging harness 92.

[0076] In the vibrating environment of vehicle operation, loose wiring harnesses will collide and rub against the frame 1, producing abnormal noise. Over time, this can lead to wear of the wiring harness insulation layer, causing short circuits or even fire risks. This invention achieves tensioning and fixing through the cooperation of the longitudinal beam 11 and the upper bracket, fundamentally eliminating the sway of the wiring harness and avoiding the above-mentioned problems.

[0077] Furthermore, in this invention, the electronic control power supply harness 91 and the fast charging harness 92 are connected to the vehicle frame 1 via a limiting bracket 10. The limiting bracket 10 is mainly used to limit the position of the electronic control power supply harness 91 and the fast charging harness 92 near the battery pack 11-1. In actual use, the electronic control power supply harness 91 and the fast charging harness 92 are overlapped on the upper bracket unit 8. Before the battery pack 11-1 is introduced, the electronic control power supply harness 91 and the fast charging harness 92 are introduced from top to bottom. During connection, the end connectors of the electronic control power supply harness 91 and the fast charging harness 92 are easily affected by longitudinal force. This invention, through the setting of the limiting bracket 10, can limit the position of the electronic control power supply harness 91 and the fast charging harness 92, reducing the risk of the electronic control power supply harness 91 and the fast charging harness 92 detaching from the battery pack 11-1.

[0078] Specifically, the limiting bracket 10 in this invention includes a U-shaped frame 101; the U-shaped frame 101 is connected to the crossbeam of the vehicle frame 1; and an mounting inclined plate 102 is provided on the U-shaped frame 101; the mounting inclined plate 102 is arranged at an angle; the mounting inclined plate 102 of this invention is arranged at an angle, which is mainly relative to the horizontal plane; the subsequent electronic control power supply harness 91 and fast charging harness 92 are respectively connected to the mounting inclined plate 102 through harness clips, so that the inclined mounting inclined plate 102 has a good guiding and binding effect, ensuring the stability of the connection between the electronic control power supply harness 91 and the fast charging harness 92 and the battery pack 11-1.

[0079] A vehicle including the chassis system.

[0080] Example:

[0081] This invention discloses a chassis system, including a frame 1; the frame 1 is equipped with a rear axle assembly, a spare tire assembly 5, and a charging system; the rear axle assembly includes a rear axle unit 3 and a drive motor 4 connected to the rear axle unit 3; the charging system includes an electronic control system 2, a battery pack 11-1, and a charging port assembly 6; the electronic control system 2 is arranged in the area between the spare tire assembly 5 and the rear axle assembly; the charging port assembly 6 is connected to the battery pack 11-1, the electronic control system 2 is connected to the battery pack 11-1, and the electronic control system 2 is connected to the drive motor 4 via wiring harnesses. The units are connected; the electronic control system 2, battery pack 11-1, and charging port assembly 6 are all arranged close to the rear axle assembly; the charging port assembly 6 is arranged on the outer side of the frame 1 and close to the electronic control system 2; the inspection port in the electronic control system 2 is arranged downwards; based on the above design, the length of the three-phase wire from the electronic control system 2 to the drive motor 4 can be reduced, the wiring harness loss can be reduced, and the range can be improved; the inspection port of the electronic control system 2 is arranged downwards, which makes it convenient to troubleshoot from below; the charging system is arranged behind the rear wheel close to the electronic control system 2, which can reduce charging power consumption and improve charging efficiency.

[0082] In this invention, the electronic control system 2 is located between the rear axle assembly and the spare tire assembly 5; the drive motor 4 is fixed on the rear axle unit 3; the electronic control system 2 and the drive motor 4 are connected by a three-phase wire; the charging socket is arranged behind the rear axle and fixed on the side of the frame 1, and the charging socket and the electronic control system 2 are connected by a charging cable harness.

[0083] The electronic control system 2 of this invention is arranged behind the drive motor 4 and connected through a shorter three-phase wiring harness; the inspection port of the electronic control system 2 faces downward to meet the needs of later maintenance without removing the upper structure; the electronic control system 2 is arranged in front of the spare tire to avoid the impact of rear vehicle collisions on the safety of the electronic control system 2 controller; the electronic control system 2 is arranged inside the longitudinal beam 11 to avoid the impact of side collisions on the safety of the electronic control system 2 controller; the charging port assembly 6 is arranged close to the electronic control system 2 to reduce the length of the charging harness, which can reduce the harness loss during charging and improve charging efficiency.

[0084] The new energy electric control system 2 mentioned in this invention includes an electric control system 2, an integrated rear axle assembly, a spare tire assembly 5, a charging system, and a vehicle frame 1; wherein the electric control system 2 includes an electric control system 2 controller and a lower support unit 7 and an upper support unit 8; the rear axle assembly includes an integrated rear axle and a drive motor 4; the spare tire assembly 5 includes a spare tire and a spare tire fixing bracket; the charging system includes a charging port 62, a charging bracket 61, a charging harness, and a charging harness fixing bracket; the vehicle frame 1 includes two longitudinal beams 11; the two longitudinal beams 11 are the left longitudinal beam 11, the right longitudinal beam 11, and the rear crossbeam of the vehicle frame 1.

[0085] The controller of the electronic control system 2 is fixed on the lower support unit 7, which is fixed on the frame 1. The controller of the electronic control system 2 is connected to the drive motor 4 through the motor power supply harness 9. The upper support unit 8 is fixed to the longitudinal beam 11 of the frame 1. The controller of the electronic control system 2, the lower support unit 7, and the upper support unit 8 are arranged in front of the spare tire assembly 5 and the rear crossbeam of the frame 1, forming two layers of protection to avoid damage to the electronic control system 2 that may be caused by a rear collision. The controller of the electronic control system 2 and the lower support unit 7 are located between the left longitudinal beam 11 and the right longitudinal beam 11 of the frame 1 to avoid damage to the electronic control system 2 that may be caused by a side collision.

[0086] The three-phase interface of the electrical control system 2 is located behind the integrated bridge near the motor, and the three-phase wire harness is shorter and consumes less power.

[0087] The spare tire mounting bracket is fixed below the left longitudinal beam 11 and the right longitudinal beam 11 of the frame 1. The spare tire is fixed on the spare tire mounting bracket, which is located in front of the rear crossbeam of the frame 1.

[0088] The charging system is located on the outside of the left longitudinal beam 11 of the frame 1. The charging bracket 61 is fixed on the longitudinal beam 11 of the frame 1, and the charging port 62 is fixed on the charging bracket 61. The charging port 62 is connected to the controller of the electronic control system 2 through a charging cable harness. The charging cable harness is fixed on the charging cable harness fixing bracket, which is fixed on the longitudinal beam 11 of the frame 1. The charging port 62 is located close to the controller of the electronic control system 2. The charging cable harness is short, consumes less power, and has high charging efficiency.

[0089] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A chassis system, characterized in that, Includes a vehicle frame; the vehicle frame is equipped with a rear axle assembly, a spare tire assembly, and a charging system; The rear axle assembly includes a rear axle unit and a drive motor connected to the rear axle unit; The charging system includes an electronic control system, a battery pack, and a charging port assembly; the electronic control system is located in the area between the spare tire assembly and the rear axle assembly. The charging port assembly is connected to the battery pack, the electronic control system is connected to the battery pack, and the electronic control system is connected to the drive motor via a wiring harness unit.

2. The chassis system according to claim 1, characterized in that, The electronic control system, battery pack, and charging port assembly are all located near the rear axle assembly; the charging port assembly is located on the outer side of the vehicle frame and near the electronic control system; the inspection port in the electronic control system is arranged downwards.

3. A chassis system according to claim 1, characterized in that; The charging system includes a support unit, which includes a lower support unit; the lower support unit includes two parallel lower mounting brackets spaced apart; each lower mounting bracket is connected at both ends to two longitudinal beams in the vehicle frame.

4. A chassis system according to claim 3, characterized in that; The support unit includes an upper support unit, which includes two parallel upper mounting brackets spaced apart. Each upper mounting bracket is connected at both ends to two longitudinal beams in the vehicle frame.

5. A chassis system according to claim 4, characterized in that; The upper support unit is located above the drive motor.

6. A chassis system according to claim 4, characterized in that; The frame includes two spaced longitudinal beams; the two longitudinal beams are connected by multiple crossbeams. The longitudinal beam includes a web, an upper flange, and a lower flange; the upper flange and the lower flange are distributed on opposite sides of the web; the vertical cross-section of the longitudinal beam is shaped like the Chinese character "["; The upper support unit overlaps the upper flange of the longitudinal beam; The lower support unit is connected to the lower flange of the longitudinal beam.

7. A chassis system according to claim 4, characterized in that; The wiring harness unit includes a fast charging harness, a slow charging harness, an electronic control power supply harness, and a motor power supply harness; the charging port assembly is connected to the battery pack via the fast charging harness; The charging port assembly is connected to the electronic control system via a slow charging harness; The battery pack is connected to the electronic control system via an electronic control power supply harness; The electronic control system is connected to the drive motor via a motor power supply harness; The fast charging harness, the electronic control power supply harness, and the motor power supply harness are connected to the upper support unit.

8. A chassis system according to claim 7, characterized in that; The fast charging harness, the electronic control power supply harness, and the motor power supply harness are all connected to the upper support unit; the fast charging harness crosses the longitudinal beam of the vehicle frame and connects to the upper support unit.

9. A chassis system according to claim 7, characterized in that; The electronic control power supply harness and the fast charging harness are connected to the vehicle frame through a limiting bracket; The limiting bracket includes a U-shaped frame; the U-shaped frame is provided with an inclined mounting plate; the inclined mounting plate is arranged at an angle. The mounting ramp is provided with a waist-shaped groove.

10. A vehicle, characterized in that, Includes the chassis system as described in any one of claims 1-9.

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