Chassis structure of off-road vehicle and off-road vehicle

Abstract

The invention relates to an off-road vehicle chassis structure and an off-road vehicle, and belongs to the technical field of automobile chassis structures. The bottom protection plate assembly comprises a cabin protection plate, a battery pack protection plate, an oil tank protection plate and a motor protection plate which are detachably arranged on the chassis assembly, are sequentially distributed in the length direction of the chassis assembly and are not overlapped with one another; the engine room protection plate, the battery pack protection plate, the oil tank protection plate and the motor protection plate are each provided with a longitudinal groove penetrating in the length direction of the chassis, and the engine room protection plate is provided with an oblique groove which is communicated with the longitudinal groove in the engine room protection plate and obliquely extends backwards to the outer side. The cabin protection plate, the battery pack protection plate, the oil tank protection plate and the motor protection plate are sequentially distributed in the length direction of the chassis assembly and installed on the chassis assembly in a non-overlapping mode, and the protection plates can be independently disassembled, assembled and replaced and do not affect one another; a user can flexibly select the protection plates with different thicknesses or protection levels for assembly or replacement according to actual protection requirements, and efficient customized configuration is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile chassis structure, in particular to an off-road vehicle chassis structure and off-road vehicle. BACKGROUND

[0002] The structure design and arrangement of the current automobile bottom guard plate are the key difficulties of automobile protection, especially under off-road working conditions, the bottom of the vehicle is easily damaged by rock, sand, silt and other impacts, and the protection demand is significantly different due to the differences in vehicle structure, use environment and road conditions, resulting in that the industry has not formed a unified protection standard.

[0003] In the prior art, the off-road vehicle bottom guard plate generally adopts a crimping structure, which is fixed by pressing the front plate against the rear plate and cooperating with the bolt connection, but this design causes the disassembly process to be operated in sequence, and the front guard plate needs to be removed layer by layer to access the rear components during maintenance, which greatly prolongs the maintenance time; at the same time, the bottom guard plate structure after installation is easy to form air turbulence, which not only reduces the passability of the vehicle, but also significantly increases the wind resistance coefficient of the whole vehicle, thereby increasing the energy consumption.

[0004] Therefore, it is necessary to research and improve the existing structure, provide an off-road vehicle chassis structure and off-road vehicle, so as to achieve the purpose of higher practical value. SUMMARY

[0005] The embodiment of the present application provides an off-road vehicle chassis structure and off-road vehicle to solve the problems of difficult disassembly and poor wind resistance performance of the off-road vehicle bottom guard plate structure in the prior art.

[0006] In a first aspect, the embodiment of the present application provides an off-road vehicle chassis structure, comprising: a chassis assembly; a bottom guard plate assembly comprising a cabin guard plate, a battery pack guard plate, a fuel tank guard plate and a motor guard plate which are arranged in sequence and do not overlap with each other along the length direction of the chassis assembly and are detachably arranged on the chassis assembly; The cabin guard plate, the battery pack guard plate, the fuel tank guard plate and the motor guard plate are all provided with longitudinal grooves arranged through along the length direction of the chassis, and the cabin guard plate is provided with a diagonal groove which is in communication with the longitudinal groove thereon and extends to the outside rearwardly.

[0007] In the first aspect, in some embodiments, the middle part of the cabin guard plate protrudes to both sides to form lugs, and the lugs on both sides are symmetrically distributed in the width direction of the cabin guard plate.

[0008] In the first aspect, in some embodiments, the longitudinal grooves on the cabin guard plate, the battery pack guard plate, the fuel tank guard plate and the motor guard plate all protrude downward to form longitudinal ribs, and the longitudinal ribs are distributed at intervals along the width direction of the chassis assembly.

[0009] In some embodiments of the first aspect, the oblique grooves are arranged in two groups and symmetrically distributed along the width direction of the cabin panel, the longitudinal grooves and the oblique grooves on the cabin panel are arranged in a downward protruding manner, and the downward protruding height of the oblique grooves is less than or equal to the downward protruding height of the longitudinal grooves.

[0010] In some embodiments of the first aspect, the cabin panel, the battery pack panel, the oil tank panel and the motor panel are all provided with bolt holes, and the peripheral area of the bolt hole is upwardly raised to form a boss, and the boss is used for accommodating the head of the bolt.

[0011] In some embodiments of the first aspect, the upper surface of the battery pack panel is connected with a plurality of reinforcing crossbeams which are spaced apart along the length direction of the battery pack panel, and the two ends of the reinforcing crossbeams are respectively connected with a connecting frame used for connecting the chassis assembly.

[0012] In some embodiments of the first aspect, the cabin panel, the battery pack panel, the oil tank panel and the motor panel are all provided with through holes which communicate with the longitudinal grooves thereon, and the through holes are spaced apart along the length direction of the longitudinal grooves.

[0013] In some embodiments of the first aspect, the chassis assembly comprises a frame and a front crossbeam, a front subframe, a front hanger, a rear hanger and a rear subframe which are connected to the frame and are spaced apart along the length direction of the frame; The cabin panel is connected with the front crossbeam and the front subframe, the battery pack panel is connected with the front subframe and the front hanger, the oil tank panel is connected with the front hanger and the rear hanger, and the motor panel is connected with the rear hanger and the rear subframe.

[0014] In some embodiments of the first aspect, the motor panel comprises a first panel and a second panel, the first panel is connected with the rear hanger and the rear subframe, the second panel is connected with the rear subframe, and a gap is arranged between the first panel, the second panel and the oil tank panel for exposing an exhaust pipe.

[0015] In some embodiments of the first aspect, the front hanger comprises a front support connected to the frame, and a front mounting beam connected to the front support and used for mounting the battery pack panel and the oil tank panel; The rear hanger comprises a rear support connected to the frame, and a rear mounting beam connected to the rear support and used for mounting the oil tank panel and the motor panel.

[0016] The second aspect provides an off-road vehicle, comprising: The off-road vehicle chassis structure according to any one of the above.

[0017] The technical scheme provided by the present application has the following beneficial effects: The off-road vehicle chassis structure and the off-road vehicle are provided, and the bottom guard plate assembly comprises a cabin guard plate, a battery pack guard plate, an oil tank guard plate and a motor guard plate which are detachably arranged on the chassis assembly and sequentially distributed along the length direction of the chassis assembly and do not overlap with each other; the cabin guard plate, the battery pack guard plate, the oil tank guard plate and the motor guard plate are all provided with longitudinal grooves arranged through along the length direction of the chassis; and the cabin guard plate is provided with an oblique groove which is communicated with the longitudinal groove on the cabin guard plate and extends to the outside in a rearward and inclined manner.

[0018] Therefore, by arranging the cabin guard plate, the battery pack guard plate, the oil tank guard plate and the motor guard plate on the chassis assembly in a sequentially distributed and non-overlapping manner along the length direction of the chassis assembly, each guard plate can be independently disassembled and replaced without affecting each other; the user can flexibly select the guard plates with different thicknesses or protection levels for assembly or replacement according to actual protection requirements, so as to realize efficient customized configuration. Meanwhile, the longitudinal grooves on each guard plate are through in the length direction of the chassis, can be aligned to form a continuous air guide channel, effectively reduce the wind resistance coefficient of the whole vehicle and reduce energy consumption; the oblique groove on the cabin guard plate is communicated with the longitudinal groove, guides the airflow to the wheel area, assists the brake disc in heat dissipation and significantly improves the brake performance. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is a structure top view of the bottom guard plate assembly of the embodiment of the present application. Figure 2 It is a structure bottom view of the bottom guard plate assembly of the embodiment of the present application. Figure 3 It is a structure bottom view of the front subframe of the embodiment of the present application. Figure 4 It is an installation schematic diagram of the cabin guard plate of the embodiment of the present application. Figure 5 It is an installation schematic diagram of the oil tank guard plate of the embodiment of the present application. Figure 6 It is a structure schematic diagram of the motor guard plate of the embodiment of the present application.

[0021] In the drawings, the component list represented by each sign is as follows: 1, cabin guard plate; 101, lug; 2, battery pack guard plate; 3, oil tank guard plate; 4, motor guard plate; 401, first guard plate; 402, second guard plate; 5, longitudinal groove; 6, inclined groove; 7, bolt hole; 8, boss; 9, reinforcing cross beam; 10, connecting frame; 11, through hole; 12, frame; 13, front cross beam; 14, front subframe; 15, exhaust pipe; 16, front support; 17, front mounting beam; 18, rear support; 19, rear mounting beam. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The embodiments of the present application provide an off-road vehicle chassis structure and an off-road vehicle to solve the problems of difficult disassembly and poor wind resistance performance of the off-road vehicle bottom guard plate structure in the prior art.

[0024] Referring to Figures 1 to 6 The first aspect of the embodiments of the present application provides an off-road vehicle chassis structure, comprising: a chassis assembly; a bottom guard plate assembly comprising a cabin guard plate 1, a battery pack guard plate 2, an oil tank guard plate 3, and a motor guard plate 4 which are detachably arranged on the chassis assembly and sequentially distributed along the length direction of the chassis assembly and do not overlap with each other; The cabin guard plate 1, the battery pack guard plate 2, the oil tank guard plate 3, and the motor guard plate 4 are all provided with longitudinal grooves 5 arranged through along the length direction of the chassis, and the cabin guard plate 1 is provided with an inclined groove 6 which is in communication with the longitudinal groove 5 thereon and extends to the outside rearwardly.

[0025] The off-road vehicle chassis structure of the embodiments of the present application realizes the independent disassembly and replacement functions of each guard plate by arranging the cabin guard plate 1, the battery pack guard plate 2, the oil tank guard plate 3, and the motor guard plate 4 on the chassis assembly sequentially along the length direction of the chassis assembly and not overlapping with each other, and completely solves the disadvantages of the traditional crimping type structure which needs to be disassembled layer by layer.

[0026] In actual use, the user can flexibly configure guard plates of different thicknesses or protection levels according to different off-road environments, such as rocky road surfaces or muddy road sections, to realize rapid customized protection, complete local maintenance without disassembling other guard plates, and significantly improve maintenance efficiency.

[0027] Meanwhile, the longitudinal grooves 5 provided on the surfaces of the respective guards pass through in the length direction of the chassis and can be aligned to form a continuous air guide channel, which can effectively guide the airflow to flow smoothly through the chassis, reduce the wind resistance coefficient of the whole vehicle, and reduce energy loss during driving.

[0028] In particular, the oblique grooves 6 designed on the engine compartment guard 1 are in precise communication with the longitudinal grooves 5, which can direct the airflow to the wheel area, accelerate the heat dissipation of the brake disc, avoid brake overheating, and significantly improve the brake response performance and safety in off-road conditions.

[0029] In terms of implementation, the guard is firmly installed through standard bolt fasteners, and the longitudinal grooves 5 can be flexibly provided on the upper surface, the lower surface, or both of the guard, ensuring that the protection strength and aerodynamic optimization can be considered in various complex road conditions, thereby providing comprehensive protection for the performance of the whole vehicle.

[0030] In the first aspect, in some optional embodiments, referring to Figures 1 to 6 The embodiment of the present application provides an off-road vehicle chassis structure, and longitudinal grooves 5 on the engine compartment guard 1, the battery pack guard 2, the fuel tank guard 3 and the motor guard 4 of the off-road vehicle chassis structure are all downwardly protruding to form longitudinal ribs, and the longitudinal ribs are distributed in a spaced manner in the width direction of the chassis assembly.

[0031] In the embodiment of the present application, the longitudinal grooves 5 on the engine compartment guard 1, the battery pack guard 2, the fuel tank guard 3 and the motor guard 4 are all downwardly protruding to form longitudinal ribs, and these ribs are distributed in a spaced manner in the width direction of the chassis assembly.

[0032] Meanwhile, the protection range of the lug 101 covers the upper half shaft rubber sleeve, avoiding direct damage to the rubber components by stone impact, ensuring the integrity and service life of the rubber components, thereby improving the overall reliability of the chassis and the durability of the whole vehicle.

[0033] In the first aspect, in some optional embodiments, referring to Figures 1 to 6 The embodiment of the present application provides an off-road vehicle chassis structure, and longitudinal grooves 5 on the engine compartment guard 1, the battery pack guard 2, the fuel tank guard 3 and the motor guard 4 of the off-road vehicle chassis structure are all downwardly protruding to form longitudinal ribs, and the longitudinal ribs are distributed in a spaced manner in the width direction of the chassis assembly.

[0034] In the embodiment of the present application, the longitudinal grooves 5 on the engine compartment guard 1, the battery pack guard 2, the fuel tank guard 3 and the motor guard 4 are all downwardly protruding to form longitudinal ribs, and these ribs are distributed in a spaced manner in the width direction of the chassis assembly.

[0035] The longitudinal ribs of the battery pack guard plate 2, the oil tank guard plate 3 and the motor guard plate 4 are precisely aligned in the width direction, ensuring that the air guide channels from the front to the rear of the chassis are continuously through. The alignment and interval distribution design enables the upper and lower surfaces of the guard plate to form double-layer air guide channels, effectively guiding the smooth flow of air along the length direction of the chassis, avoiding turbulence or stagnation of air at the junction of the guard plate, thereby significantly reducing the drag coefficient of the whole vehicle.

[0036] The interval distribution of the longitudinal ribs further optimizes the air flow path, preventing local air accumulation and improving aerodynamic efficiency. At the same time, each guard plate adopts a corrugated plate structure with a wave-shaped cross-section. The wave-shaped surface not only significantly enhances the structural rigidity and impact resistance of the guard plate, enabling it to effectively resist external impacts such as gravel and sand in off-road conditions, but also reduces air resistance through the streamlined profile.

[0037] The diagonal grooves 6 of the engine compartment guard plate 1 are connected with the longitudinal ribs, precisely guiding the air flow to the wheel area, accelerating the heat dissipation of the brake disc, avoiding overheating during braking, and improving the brake response performance. This integrated design combines protection strength, aerodynamic optimization and heat dissipation function, enabling the chassis to ensure high-strength off-road protection while optimizing the overall vehicle drag, reducing energy consumption and providing users with a more reliable and efficient off-road driving experience.

[0038] In some optional embodiments of the first aspect, referring to Figures 1 to 6 The off-road vehicle chassis structure provided by the embodiments of the present application is provided with two groups of diagonal grooves 6 symmetrically distributed along the width direction of the engine compartment guard plate 1. The longitudinal grooves 5 and the diagonal grooves 6 on the engine compartment guard plate 1 are both downwardly protruding, and the downward protruding height of the diagonal grooves 6 is less than or equal to the downward protruding height of the longitudinal grooves 5.

[0039] In the embodiments of the present application, the diagonal grooves 6 on the engine compartment guard plate 1 are designed in a structure of two groups symmetrically distributed along the width direction, ensuring the balance and precision of air flow guidance. Each group of diagonal grooves 6 is connected with the longitudinal grooves 5 of the engine compartment guard plate 1, forming a through air flow channel to guide the air flow at the lower part of the chassis to the wheel areas on both sides of the vehicle.

[0040] This design significantly improves the heat dissipation efficiency of the brake disc, effectively inhibits the overheating problem caused by high-intensity braking in off-road conditions, and thus greatly enhances the response sensitivity and braking safety of the brake system. In specific implementation, the number of diagonal grooves 6 can be flexibly configured, for example, six in each group, to achieve more uniform air distribution and more stable heat dissipation effect.

[0041] Meanwhile, the longitudinal groove 5 and the oblique groove 6 on the cabin guard plate 1 are both designed with a downward protruding structure, but the protruding height of the oblique groove 6 is strictly optimized to be less than or equal to the protruding height of the longitudinal groove 5. This key design detail not only guarantees the airflow guiding function, but also significantly reduces the impact of the grooves on the passability of the chassis bottom.

[0042] Under complex off-road conditions, the shallow protruding height of the oblique groove 6 effectively reduces the probability of contact with obstacles such as gravel and sand, avoiding the risk of groove jamming or scratching, and ensuring smooth passage of the vehicle in rugged terrain.

[0043] Through this fine structure coordination, the chassis design not only enhances the reliability of the brake system in harsh environments, but also takes into account the vehicle's aerodynamic efficiency and passability, allowing the off-road vehicle to maintain efficient heat dissipation while avoiding interruptions caused by bottom structure interference when passing obstacles at high speed, ultimately providing users with a safer and more durable off-road driving experience.

[0044] In the first aspect, in some optional embodiments: Figures 1 to 6 As shown in the figure, the off-road vehicle chassis structure provided by the embodiments of the present application is provided with a cabin guard plate 1, a battery pack guard plate 2, an oil tank guard plate 3, and a motor guard plate 4, and bolt holes 7 are arranged on the cabin guard plate 1, the battery pack guard plate 2, the oil tank guard plate 3, and the motor guard plate 4, and the peripheral area of the bolt hole 7 is upwardly raised to form a boss 8, and the boss 8 is used to accommodate the head of the bolt.

[0045] In the embodiments of the present application, the cabin guard plate 1, the battery pack guard plate 2, the oil tank guard plate 3, and the motor guard plate 4 are all designed with an upwardly raised boss 8 structure in the peripheral area of the bolt hole 7. The boss 8 precisely accommodates the bolt head, which is completely shielded during vehicle driving, effectively avoiding the risk of direct impact of gravel, sand, or rocks on the bolt under off-road conditions.

[0046] The height of the boss 8 is scientifically optimized to ensure that the bolt head is always in a protected state when the vehicle passes through rugged terrain at high speed, avoiding bolt breakage, deformation, or loosening caused by external impact. This design fundamentally eliminates the problem of guard plate fixation failure caused by bolt cutting, and prevents tearing or structural damage of the installation structure due to stress concentration of the bolt, such as the edge of the guard plate or the connection point of the chassis, completely eliminating secondary failures.

[0047] By eliminating bolt-related failures, the present solution significantly reduces maintenance difficulty and cost, reduces the frequency of user forced downtime due to accidental damage to chassis components, and improves the reliability and use economy of the vehicle.

[0048] In addition, the boss 8 design is integrated with the overall structure of the guard plate, which does not affect the regular installation and disassembly operation of the bolt, and ensures the convenience of the maintenance process, allowing users to quickly complete the replacement of the local guard plate without dealing with complex connection problems.

[0049] The innovation solves the industry pain point of bolt damage in traditional chassis design through a simple and efficient mechanical structure, not only strengthens the impact resistance of the chassis in harsh environments, but also significantly prolongs the service life of the vehicle, provides users with a safer, more economical and more worry-free long-term use experience, and realizes the perfect unity of protection reliability and maintenance convenience.

[0050] In the first aspect, in some optional embodiments: referring to Figures 1 to 6 The embodiment of the present application provides a chassis structure of an off-road vehicle, and the upper surface of the battery pack guard plate 2 is connected with a plurality of reinforcing cross beams 9 distributed along the length direction of the battery pack guard plate 2, and the two ends of the reinforcing cross beam 9 are respectively connected with a connecting frame 10 for connecting the chassis assembly.

[0051] In the embodiment of the present application, the upper surface of the battery pack guard plate 2 is firmly installed with a plurality of reinforcing cross beams 9 distributed along the length direction by welding or bolt connection, and these cross beams form a continuous support network, which significantly improves the overall structural stiffness and impact resistance of the guard plate.

[0052] The interval layout of the reinforcing cross beam 9 is precisely designed to ensure that when the battery pack guard plate 2 is subjected to external impacts such as rock impact and sand scouring under off-road working conditions, the stress can be evenly dispersed to the entire guard plate area, avoiding deformation or fracture caused by local stress concentration, thereby providing reliable protection for the battery pack in all directions.

[0053] The two ends of the cross beam are welded with a special connecting frame 10, which is rigidly fixed with the chassis assembly, not only strengthening the overall bonding strength between the battery pack guard plate 2 and the chassis, but also effectively suppressing the vibration transmission caused by road bumps during high-speed driving, preventing the connection point from loosening or failing.

[0054] This connection mode takes into account the engineering practicability and maintenance convenience: welding connection is suitable for long-term high-strength protection scene, providing permanent fixed protection; bolt connection allows users to quickly disassemble the cross beam or guard plate when needed, without the need to disassemble other chassis parts to complete local maintenance, greatly shortening the repair time and reducing the operation complexity.

[0055] Through the synergistic effect of the reinforcing cross beam 9 and the connecting frame 10, the battery pack guard plate 2 exhibits excellent structural stability in complex off-road environments, significantly reducing the risk of battery pack exposure caused by guard plate failure, and prolonging the service life of the battery system.

[0056] At the same time, the uniformly distributed reinforcing cross beams 9 optimize the weight distribution of the guard plate, avoiding the influence of local overweight on the balance of the vehicle, ensuring the smooth passability and control stability of the vehicle on rough roads.

[0057] The design not only enhances the protection level of the battery pack, but also reduces the long-term use cost of the user by simplifying the maintenance process, making the off-road vehicle have high reliability and economy in extreme working conditions, and bringing the user a safer and more efficient driving experience.

[0058] In the first aspect, in some optional embodiments, referring to Figures 1 to 6 As shown in the figure, the off-road vehicle chassis structure provided by the embodiments of the present application is provided with through holes 11 communicating with the longitudinal grooves 5 on the cabin guard plate 1, the battery pack guard plate 2, the oil tank guard plate 3 and the motor guard plate 4, and the through holes 11 are distributed along the length direction of the longitudinal grooves 5.

[0059] In the embodiments of the present application, the cabin guard plate 1, the battery pack guard plate 2, the oil tank guard plate 3 and the motor guard plate 4 are all provided with through holes 11 communicating with the longitudinal grooves 5, and these through holes 11 are scientifically distributed along the length direction of the longitudinal grooves 5 to form a continuous sand and liquid leakage channel.

[0060] The core of the design is to reasonably plan the size and distribution density of the through holes 11, so that they can efficiently deal with the problem of foreign matter intrusion in off-road scenes: when driving on bumpy roads, sand, mud and other particulate matter can be quickly discharged through the through holes 11, avoiding the accumulation of corrosive environment or hindering the function of the grooves on the surface of the guard plate; At the same time, the size of the through hole 11 is dynamically optimized according to the actual working condition, including the size of sand and stone particles, the complexity of the terrain, etc., to ensure that the drainage effect is smooth and unobstructed in different off-road environments. In the water working condition, the through hole 11 cooperates with the longitudinal groove 5 to build an efficient drainage system, so that the water flow is quickly diverted to the outside of the chassis when the vehicle passes through the water accumulation area, completely eliminating the impact risk of water accumulation on the bottom electrical devices such as battery pack and motor controller, and effectively preventing electrical short circuit or component aging.

[0061] The interval distribution design of the through hole 11 further guarantees the uniformity of drainage, avoiding local water flow retention or turbulent flow, so as to maintain a dry environment at the bottom of the chassis and prolong the service life of precision components. This integrated structure does not need to add complex components, but only needs to optimize the derivative function of the existing groove to achieve the multiple protection goals of sand and liquid leakage and drainage.

[0062] At the same time, the layout of the through hole 11 is integrated with the overall structure of the guard plate, which does not affect the structural strength of the chassis, and significantly improves the maintenance convenience. When cleaning or checking, the user does not need to disassemble the guard plate, but only needs to observe or clean the internal storage through the through hole 11.

[0063] This design not only solves the problem of electrical failures caused by water accumulation in traditional chassis, but also optimizes the aerodynamic performance of the vehicle by simplifying the drainage path. This enables off-road vehicles to have high reliability, low failure rate and long service life under complex road conditions, bringing users a safer and more economical off-road experience.

[0064] Firstly, in some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides an off-road vehicle chassis structure. The chassis assembly of the off-road vehicle chassis structure includes a frame 12 and a front crossbeam 13, a front subframe 14, a front hanger, a rear hanger, and a rear subframe that are connected to the frame 12 and spaced apart along the length of the frame 12. The engine compartment guard plate 1 connects the front crossbeam 13 and the front subframe 14, the battery pack guard plate 2 connects the front subframe 14 and the front suspension, the fuel tank guard plate 3 connects the front suspension and the rear suspension, and the motor guard plate 4 connects the rear suspension and the rear subframe.

[0065] In this embodiment, the chassis assembly uses the frame 12 as the core supporting skeleton, and key supporting components such as the front crossbeam 13, front subframe 14, front suspension, rear suspension and rear subframe are scientifically spaced along the length of its bottom to form a stable chassis structure network.

[0066] This layout not only significantly improves overall rigidity but also provides a reliable benchmark for the precise installation of the skid plate components. Specifically, the engine compartment skid plate 1 is rigidly connected to the front crossbeam 13 and the front subframe 14 at the front end of the frame 12 via bolts and fasteners; the battery pack skid plate 2 is connected to the front subframe 14 and the front suspension via bolts and fasteners; the fuel tank skid plate 3 is connected to the front suspension and the rear suspension via bolts and fasteners; and the motor skid plate 4 is connected to the rear suspension and the rear subframe via bolts and fasteners. The rear subframe is not shown in the figure.

[0067] Each skid plate is arranged sequentially along the length of the chassis, with strict non-overlapping joints to ensure seamless protection of the protected areas. This design completely solves the problem of complex disassembly and assembly caused by overlapping installations of traditional skid plates. Users can independently remove skid plates for specific areas without disassembling adjacent components, significantly reducing maintenance time and simplifying operations.

[0068] Meanwhile, the bolted connection method ensures high-strength fixation while maintaining the maintainability of the structure: in rugged off-road conditions, the precise docking of the skid plate and chassis components effectively disperses external impact forces, avoiding structural deformation or failure caused by local stress concentration.

[0069] Firstly, in some alternative embodiments: see Figures 1 to 6As shown, this application embodiment provides an off-road vehicle chassis structure. The motor guard plate 4 of the off-road vehicle chassis structure includes a first guard plate 401 and a second guard plate 402. The first guard plate 401 is connected to the rear suspension and the rear subframe, and the second guard plate 402 is connected to the rear subframe. A gap is provided between the first guard plate 401, the second guard plate 402 and the fuel tank guard plate 3 to expose the exhaust pipe 15.

[0070] In this embodiment, the motor guard plate 4 is innovatively divided into a first guard plate 401 and a second guard plate 402, achieving a balance between functional optimization and ease of installation through a split structure. The two ends of the first guard plate 401 are reliably connected to the rear hanger and the rear subframe by bolts, forming a rigid support for the front end of the motor area; both ends of the second guard plate 402 are fixed to the rear subframe by bolts, ensuring the stability and strength of the rear structure.

[0071] This split layout allows the motor guard plate 4 to connect along the overall length of the chassis while avoiding overlap with adjacent components, significantly improving overall installation efficiency. A key design feature is the dedicated gap between the first guard plate 401, the second guard plate 402, and the fuel tank guard plate 3. This gap precisely corresponds to the position of the exhaust pipe 15, ensuring that the exhaust pipe 15 is fully exposed during vehicle operation. This effectively promotes heat dissipation and prevents overheating or performance degradation of the exhaust pipe 15 due to guard plate obstruction, thereby improving the reliability and durability of the engine system.

[0072] Furthermore, the first skid plate 401 and the second skid plate 402 can be rigidly connected to the rear subframe via a dedicated reinforcing bracket. This not only strengthens the overall structural rigidity of the skid plates but also effectively suppresses vibration transmission caused by bumps in off-road conditions, preventing the skid plates from shifting or loosening. This bracket connection method balances strength and maintainability. When it is necessary to inspect the exhaust pipe 15 or motor components, the corresponding skid plate can be directly removed without affecting other areas, significantly shortening maintenance time.

[0073] Firstly, in some alternative embodiments: see Figures 1 to 6 As shown, this application embodiment provides an off-road vehicle chassis structure. The front suspension of the off-road vehicle chassis structure includes a front bracket 16 connected to the frame 12, and a front mounting beam 17 connected to the front bracket 16 and used to install the battery pack guard plate 2 and the fuel tank guard plate 3. The rear suspension includes a rear bracket 18 connected to the frame 12, and a rear mounting beam 19 connected to the rear bracket 18 for mounting the fuel tank guard plate 3 and the motor guard plate 4.

[0074] In this embodiment, the front suspension bracket features an innovative modular design, consisting of a front support 16 bolted to the central crossbeam of the frame 12 and a front mounting beam 17 bolted to the front support 16. The front mounting beam 17 serves as a key lifting support component, specifically designed for the precise positioning and installation of the battery pack guard plate 2 and the fuel tank guard plate 3. The front support 16 is scientifically distributed along the central crossbeam of the frame 12, forming a stable support network to ensure that the battery pack guard plate 2 and the fuel tank guard plate 3 are subjected to uniform stress during installation.

[0075] The rear suspension adopts a symmetrical layout, consisting of a rear bracket 18 bolted to the longitudinal beams on both sides of the frame 12 and a rear mounting beam 19 connected to the rear bracket 18. The rear mounting beam 19 is specifically designed to provide an installation reference for the fuel tank guard plate 3 and the motor guard plate 4. The rear end of the battery pack guard plate 2 and the front end of the fuel tank guard plate 3 are connected at the front mounting beam 17, while the rear end of the fuel tank guard plate 3 and the front end of the motor guard plate 4 are connected at the rear mounting beam 19.

[0076] The entire underbody protection plate is connected to the frame 12 with bolts, maintaining a certain gap between the plates to avoid installation interference. During aftermarket assembly with the frame 12, the front bracket 16 and rear bracket 18 are installed first, followed by the front mounting beam 17 and rear mounting beam 19. Finally, the engine compartment protection plate 1, battery pack protection plate 2, fuel tank protection plate 3, and motor protection plate 4 are installed—assembly can be completed in just three steps. Disassembly is the reverse of the assembly process.

[0077] When the vehicle is in motion and encounters an impact, the underbody protection plate will collapse first, followed by the collapse of bracket 18, thus better protecting the internal structure of the vehicle body. At the same time, the bolted installation method ensures high-strength fixation while allowing users to independently disassemble and install specific areas, such as the battery pack or motor area, without having to remove adjacent protection plates, significantly reducing maintenance time.

[0078] This design enhances protection in critical areas while avoiding the negative impact of redundant structures on off-road capability, enabling the vehicle to maintain efficient passage and stable braking in rugged terrain. Ultimately, the coordinated layout of the front and rear pylons achieves a harmonious balance between protective reliability, aerodynamic performance, and ease of maintenance, providing comprehensive protection for the long-term stable operation of off-road vehicles in extreme environments.

[0079] See Figures 1 to 6 As shown, a second aspect of this application provides an off-road vehicle, including: The off-road vehicle chassis structure of any of the above embodiments.

[0080] In this embodiment, the off-road vehicle adopts the chassis structure described in the above embodiment. This chassis structure, through the coordinated design of independently detachable underbody protection components and optimized longitudinal grooves 5 and oblique grooves 6, effectively reduces the overall vehicle drag coefficient, improves airflow efficiency, and significantly enhances the chassis's protection strength and ease of maintenance on rough terrain, providing users with a more reliable and economical off-road driving experience.

[0081] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0082] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A chassis structure for an off-road vehicle, characterized in that, include: Chassis assembly; The underbody assembly includes a cabin underbody (1), a battery pack underbody (2), a fuel tank underbody (3), and a motor underbody (4) that are detachably disposed on the chassis assembly and distributed sequentially along the length of the chassis assembly and do not overlap with each other. The engine compartment guard plate (1), battery pack guard plate (2), fuel tank guard plate (3) and motor guard plate (4) are all provided with longitudinal grooves (5) that run through the chassis length direction. The engine compartment guard plate (1) is provided with oblique grooves (6) that communicate with the longitudinal grooves (5) and extend backward to the outside.

2. The off-road vehicle chassis structure as described in claim 1, characterized in that: The middle part of the cabin liner (1) protrudes to both sides to form lugs (101), and the lugs (101) on both sides are symmetrically distributed in the width direction of the cabin liner (1).

3. The off-road vehicle chassis structure as described in claim 1, characterized in that: The longitudinal grooves (5) on the engine compartment guard plate (1), battery pack guard plate (2), fuel tank guard plate (3) and motor guard plate (4) all protrude downward to form longitudinal ribs, and the longitudinal ribs are distributed at intervals along the width direction of the chassis assembly.

4. The off-road vehicle chassis structure as described in claim 1, characterized in that: The oblique grooves (6) are provided in two sets and are symmetrically distributed along the width direction of the cabin liner (1). The longitudinal grooves (5) and oblique grooves (6) on the cabin liner (1) are both provided to protrude downwards, and the downward protrusion height of the oblique grooves (6) is less than or equal to the downward protrusion height of the longitudinal grooves (5). The engine compartment guard plate (1), battery pack guard plate (2), fuel tank guard plate (3) and motor guard plate (4) are all provided with bolt holes (7), and the surrounding area of ​​the bolt holes (7) is raised to form a boss (8), which is used to accommodate the bolt head.

5. The off-road vehicle chassis structure as described in claim 1, characterized in that: The upper surface of the battery pack guard plate (2) is connected to a plurality of reinforcing crossbeams (9) spaced apart along the length of the battery pack guard plate (2), and the two ends of the reinforcing crossbeams (9) are respectively connected to connecting brackets (10) for connecting the chassis assembly.

6. The off-road vehicle chassis structure as described in claim 1, characterized in that: The engine compartment guard plate (1), battery pack guard plate (2), fuel tank guard plate (3) and motor guard plate (4) are all provided with through holes (11) that connect to the longitudinal grooves (5) thereon. The through holes (11) are distributed at intervals along the length of the longitudinal grooves (5).

7. The off-road vehicle chassis structure as described in claim 1, characterized in that: The chassis assembly includes a frame (12) and a front crossbeam (13), a front subframe (14), a front hanger, a rear hanger, and a rear subframe that are connected to the frame (12) and spaced apart along the length of the frame (12). The engine compartment guard plate (1) connects the front crossbeam (13) and the front subframe (14), the battery pack guard plate (2) connects the front subframe (14) and the front pylon, the fuel tank guard plate (3) connects the front pylon and the rear pylon, and the motor guard plate (4) connects the rear pylon and the rear subframe.

8. The off-road vehicle chassis structure as described in claim 7, characterized in that: The motor guard plate (4) includes a first guard plate (401) and a second guard plate (402). The first guard plate (401) is connected to the rear suspension and the rear subframe, and the second guard plate (402) is connected to the rear subframe. A gap is provided between the first guard plate (401), the second guard plate (402) and the fuel tank guard plate (3) to expose the exhaust pipe (15).

9. The off-road vehicle chassis structure as described in claim 7 or 8, characterized in that: The front suspension includes a front bracket (16) connected to the vehicle frame (12) and a front mounting beam (17) connected to the front bracket (16) for mounting the battery pack guard plate (2) and the fuel tank guard plate (3). The rear suspension includes a rear bracket (18) connected to the frame (12) and a rear mounting beam (19) connected to the rear bracket (18) for mounting the fuel tank guard plate (3) and the motor guard plate (4).

10. An off-road vehicle, characterized in that, include: The off-road vehicle chassis structure according to any one of claims 1 to 9.

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